巴西专利BR112013030021B1 hot compression molding method and hot compression molding matrix

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专利摘要:
HOT COMPRESSION MOLDING METHOD AND HOT COMPRESSION MOLDING MATRIX. The present invention relates to a method of hot compression molding to mold a heated metal plate (K) using a molding matrix (20, 60) comprising an upper matrix (21) and a lower matrix (20). According to the method, the heated metal plate is arranged between the upper and lower matrix, the upper and lower matrix are brought together and the metal plate retained between the matrices is compressed. After the metal plate is compressed, a refrigerant in the form of a liquid or nevus is supplied through a plurality of supply holes provided to the lower matrix to a surface of the metal plate retained between the matrices, and once the refrigerant has just been When supplied, a gas is sprayed onto the surface of the metal plate through a plurality of supply holes. In this way, it is possible to remove, at maximum speed, the liquid refrigerant adhering to the metal plate when the liquid refrigerant supply is interrupted.
公开号:BR112013030021B1
申请号:R112013030021-3
申请日:2012-05-22
公开日:2021-01-12
发明作者:Hiroshi Fukuchi；Yuichi Ishimori
申请人:Nippon Steel Corporation；
IPC主号:

专利说明:

[0001] [0001] The present invention relates to a method of hot compression forming and a hot compression forming matrix of a metal sheet. BACKGROUND OF THE TECHNIQUE
[0002] [0002] In recent years, as a means of forming a metal sheet for auto parts using high strength metal sheet, hot compression forming has been increasingly employed. Hot compression formation forms a sheet of steel at a high temperature to thereby form it at a low strain resistance stage and then quickly cools it to harden it with sudden cooling. With hot compression forming, it is possible to press forming parts that are high in strength and high in shape accuracy without causing deformation or other forming problems after modeling.
[0003] [0003] Specifically, with the hot compression forming method, first, the steel sheet that has been heated in advance by a heating furnace to a predetermined temperature is supplied to a compression matrix. After that, in a state placed on the bottom matrix (matrix) or in a state raised from the bottom matrix by lifters or other fixings built into the bottom matrix, a top matrix (punch) is lowered to the limit of the background matrix. Then, the steel sheet is cooled for a certain time (usually 10 s to 15 s) to cool the steel sheet to a desired temperature. In addition, after the end of cooling, the formed steel sheet is removed from the matrix, then a new steel sheet that has been heated to a predetermined temperature is supplied to the compression matrix. The steel sheet is abruptly cooled, quenched and otherwise heat treated in the cooling process. Therefore, in hot compression formation, freely control the cooling rate from the point of view of the heat treatment characteristics of the steel sheet, obtain a uniform cooling rate in the steel sheet as a whole from the point of view of stability of quality, and shortening the time required for the cooling process after shaping the steel sheet from the point of view of productivity, are important.
[0004] [0004] As a means of shortening the cooling time of the formed steel sheet, it has been proposed not to make the die directly steal heat from the steel sheet, but to feed another medium, for example, water, to the surface of the steel sheet (e.g., PLT 1). In particular, in the hot compression forming apparatus which is described in PLT 1, the internal surface of the matrix is provided with a plurality of independent projections of certain heights and channels for water which are communicated with a plurality of locations on the internal surface of the matrix. matrix are provided within the matrix. Because of this, it is possible to run the refrigerant through the channels within the matrix in the gaps that are formed by the projections between the internal surface of the matrix and the steel sheet. For this reason, it is possible to cool the sheet metal in a short time and increase the productivity of the hot compression forming operation. In addition, this rapid cooling by rapid cooling allows the steel sheet to be increased in hardness and the strength of the formed part to be greatly improved.
[0005] [0005] In addition, as a means of shortening the time required for the cooling process after forming the steel sheet, it has been proposed to have a storage container to store a refrigerant as close to the metal sheet as possible (for example , PLT 2). In particular, the matrix that is described in PLT 2 is provided with a storage container that stores a refrigerant, a plurality of feed holes that feed the refrigerant that is stored in the storage container to the steel sheet, and a control device of refrigerant supply that is provided between the storage container and the supply ports. By having a refrigerant storage container arranged within the die in this way, it is possible to shorten the distance between the refrigerant storage location and the refrigerant supply locations. Because of this, it becomes possible to feed the refrigerant to the steel sheet immediately after the control device has sent a refrigerant feed instruction and therefore the compression time of the steel sheet at the end of the cooling process can be shortened. LIST OF QUOTES PATENT LITERATURE
[0006] [0006] PLT 1: JP Patent Publication No. 2005-169394A
[0007] [0007] PLT 2: JP Patent Publication 2007-136535A SUMMARY OF THE INVENTION TECHNICAL PROBLEM
[0008] [0008] In this respect, in general the rate of heat conduction of a liquid is higher than the rate of heat conduction of a gas and therefore when using a liquid refrigerant as a refrigerant to cool the metal sheet after being compressed, the metal sheet can be cooled quickly compared to using a refrigerant in the gaseous state. From this point of view, in both PLTs 1 and 2 above, as the refrigerant, a liquid, in particular water, is used.
[0009] [0009] In this regard, when a liquid refrigerant is used to cool the metal sheet, even after interrupting the liquid refrigerant supply, the liquid refrigerant remains on the surface of the metal sheet. This liquid refrigerant does not remain on the entire surface of the metal sheet evenly, but deposits locally on the surface of the metal sheet. In this case, the regions where the liquid refrigerant remains are rapidly cooled, while the regions where the liquid refrigerant does not remain are not so much cooled. For this reason, the metal sheet is unevenly cooled and as a result the metal sheet becomes uneven in strength. In addition, when using a liquid refrigerant comprised of water or another highly corrosive liquid (liquid that causes a metal, etc., to corrode easily), if the liquid refrigerant remains on the surface of the metal sheet, corrosion of the metal sheet will be caused.
[0010] [00010] For this reason, in order to suppress uneven resistance or corrosion of a metal sheet, it is considered necessary to remove the liquid refrigerant that has been deposited on the surface of the metal sheet as quickly as possible after compression.
[0011] [00011] Therefore, in consideration of the above problem, an objective of the present invention is to provide a hot compression forming method and a hot compression forming matrix that can remove the liquid refrigerant that has been deposited on the surface of the sheet metal as fast as possible when interrupting the liquid refrigerant supply. SOLUTION TO THE PROBLEM
[0012] [00012] The inventors studied various hot compression forming methods and various hot compression forming dies related to the removal of liquid refrigerant that was deposited on the surface of a metal sheet when interrupting the refrigerant supply in the state liquid.
[0013] [00013] As a result, they found that providing the hot compression forming matrix with a plurality of feeding holes capable of feeding fluid to the metal sheet and not only feeding the liquid refrigerant through the feeding holes on the surface of the metal sheet, but also by blowing a gas over the surface of the metal sheet, it is possible to remove the liquid refrigerant that has been deposited on the surface of the metal sheet member as quickly as possible by interrupting the supply of the refrigerant in the state liquid.
[0014] (1) Um método de formação por compressão a quente que dá forma a uma folha de metal aquecida usando uma matriz de formação que é compreendida de uma primeira matriz e uma segunda matriz, compreendendo as etapas de: dispor a folha de metal aquecida entre a primeira matriz e a segunda matriz; fazer a primeira matriz e a segunda matriz aproximarem-se para comprimir a folha de metal que está presa entre as duas matrizes; depois passar a folha de metal, alimentar refrigerante no estado líquido ou no estado de névoa à superfície da folha de metal que está presa entre as duas matrizes através de uma pluralidade de orifícios de alimentação que são providos a pelo menos uma da primeira matriz e da segunda matriz; e, depois do refrigerante acabar de ser alimentado, soprar um gás através da pluralidade de orifícios de alimentação à superfície da folha de metal. (2) O método de formação por compressão a quente, como descrito em (1), em que a primeira matriz e a segunda matriz são separadas antes de alimentar o gás à superfície da folha de metal. (3) O método de formação por compressão a quente, como descrito em (1) ou (2), em que um meio de comutação de fluido para comutar o refrigerante e o gás que são alimentados à pluralidade de orifícios de alimentação é provido no interior de pelo menos uma da primeira matriz e da segunda matriz. (4) O método de formação por compressão a quente, como descrito em (3), em que pelo menos uma da primeira matriz e da segunda matriz tem uma matriz externa nas quais os orifícios de alimentação são providos e uma matriz interna que é disposta de forma deslizável dentro da matriz externa; a matriz externa é provida em seu interior com tubos externos que são dispostos entre uma superfície de deslizamento entre a matriz externa e a matriz interna, e os orifícios de alimentação; a matriz interna é provida em seu interior com primeiros tubos internos que são dispostos entre a superfície de deslizamento e uma peça de conexão que é conectada a uma fonte de alimentação de refrigerante e com segundos tubos internos que são dispostos entre a superfície de deslizamento e uma peça de conexão que é conectada a uma fonte de alimentação de gás; e o meio de comutação de fluido faz a mátria externa e a matriz interna deslizarem com relação uma à outra para conectar os tubos externos com os primeiros tubos internos ou segundos tubos internos e, deste modo, comutar entre o refrigerante e o gás que são alimentados à pluralidade de orifícios de alimentação. (5) O método de formação por compressão a quente, como descrito em qualquer um de (1) a (4) acima, em que o refrigerante quer seja água ou óleo antiferrugem. (6) Uma matriz de formação por compressão a quente que comprime e resfria uma folha de metal aquecida, compreendendo: uma matriz externa provida com orifícios de alimentação que alimentam fluido à folha de metal; e uma matriz interna que é disposta de forma deslizável dentro da matriz externa, em que a matriz externa é provida em seu interior com tubos externos que são dispostos entre uma superfície de deslizamento entre a matriz externa e a matriz interna e os orifícios de alimentação; a matriz interna é provida em seu interior com primeiros tubos internos que são dispostos entre a superfície de deslizamento e uma peça de conexão que é conectada a uma fonte de alimentação de refrigerante e com segundos tubos internos que são dispostos entre a superfície de deslizamento e uma peça de conexão que é conectada a uma fonte de alimentação de gás; e os tubos externos, primeiros tubos internos, e segundos tubos internos são formados de modo que os tubos externos podem ser comutados entre pelo menos um estado conectado aos primeiros tubos internos e um estado conectado aos segundos tubos internos fazendo a matriz externa e a matriz interna moverem-se com relação uma à outra. (7) A matriz de formação por compressão a quente, como descrito em (6) acima, em que os tubos externos, primeiros tubos internos e segundos tubos internos são formados de modo que os tubos externos sejam comutados entre um estado conectado aos primeiros tubos internos, um estado conectado aos segundos tubos internos, e um estado não conectado aos dois tubos internos, fazendo a matriz externa e a matriz interna moverem-se com relação uma à outra. (8) A matriz de formação por compressão a quente, como descrito em (6) ou (7) acima, em que os comprimentos dos dutos dos tubos externos são iguais. (9) A matriz de formação por compressão a quente, como descrito em qualquer um de (6) a (8) acima, em que a matriz que é compreendida de matriz interna e de matriz externa é usada como pelo menos uma de uma matriz de topo e matriz de fundo para formação por compressão. (10) Matriz de formação por compressão a quente, como descrito em qualquer um de (6) a (9) acima, em que o refrigerante é qualquer um de água, óleo antiferrugem e névoas dos mesmos. [00014] The present invention was made based on the findings above and has as its essence the following: (1) A hot compression forming method that forms a heated metal sheet using a forming matrix that is comprised of a first matrix and a second matrix, comprising the steps of: arranging the heated metal sheet between the first matrix and second matrix; making the first die and the second die come together to compress the metal sheet that is stuck between the two dies; then passing the metal sheet, feeding refrigerant in liquid or mist state to the surface of the metal sheet that is trapped between the two dies through a plurality of feed holes that are provided to at least one of the first die and the second matrix; and, after the refrigerant has finished being fed, blow a gas through the plurality of feeding holes on the surface of the metal sheet. (2) The hot compression forming method, as described in (1), in which the first matrix and the second matrix are separated before feeding the gas to the surface of the metal sheet. (3) The hot compression forming method, as described in (1) or (2), wherein a fluid switching means for switching the refrigerant and gas that are fed to the plurality of supply ports is provided in the interior of at least one of the first matrix and the second matrix. (4) The hot compression forming method, as described in (3), in which at least one of the first die and the second die has an external die in which the feed holes are provided and an internal die which is arranged slidably within the external matrix; the external matrix is provided in its interior with external tubes that are arranged between a sliding surface between the external matrix and the internal matrix, and the feeding holes; the inner matrix is provided inside with first inner tubes that are arranged between the sliding surface and a connection piece that is connected to a refrigerant power supply and with second inner tubes that are arranged between the sliding surface and a connection piece that is connected to a gas power source; and the fluid switching medium causes the outer matrix and inner matrix to slide relative to each other to connect the outer tubes with the first inner tubes or second inner tubes and thus switch between the refrigerant and the gas that are fed the plurality of feed holes. (5) The hot compression forming method, as described in any one of (1) to (4) above, wherein the refrigerant is either water or anti-rust oil. (6) A hot compression forming matrix that compresses and cools a heated metal sheet, comprising: an external matrix provided with feeding holes that feed fluid to the metal sheet; and an internal matrix which is slidably disposed within the external matrix, wherein the external matrix is provided inside with external tubes that are disposed between a sliding surface between the external matrix and the internal matrix and the supply holes; the inner matrix is provided inside with first inner tubes that are arranged between the sliding surface and a connection piece that is connected to a refrigerant power supply and with second inner tubes that are arranged between the sliding surface and a connection piece that is connected to a gas power source; and the outer tubes, first inner tubes, and second inner tubes are formed so that the outer tubes can be switched between at least one state connected to the first inner tubes and a state connected to the second inner tubes making the outer matrix and the inner matrix move in relation to each other. (7) The hot compression forming matrix, as described in (6) above, in which the outer tubes, first inner tubes and second inner tubes are formed so that the outer tubes are switched between a state connected to the first tubes inner, a state connected to the second inner tubes, and a state not connected to the two inner tubes, causing the outer matrix and the inner matrix to move relative to each other. (8) The hot compression forming matrix, as described in (6) or (7) above, in which the lengths of the ducts of the external tubes are equal. (9) The hot compression forming matrix, as described in any one of (6) to (8) above, wherein the matrix which is comprised of the internal matrix and the external matrix is used as at least one of a matrix top and bottom matrix for compression formation. (10) Hot compression forming matrix, as described in any one of (6) to (9) above, in which the refrigerant is any one of water, anti-rust oil and mists thereof.
[0015] [00015] According to the present invention, it is possible to quickly remove the liquid refrigerant that was deposited on the surface of a metal sheet at the time of interrupting the liquid refrigerant supply and, as a result, it is possible to suppress the uneven strength of the formed metal sheet and the corrosion of the metal sheet. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] [00016] Figure 1 is a side view showing schematically the configuration of a hot compression forming apparatus.
[0017] [00017] Figure 2 is a plan view showing schematically the configuration of the hot compression forming apparatus.
[0018] [00018] Figure 3 is a longitudinal cross-sectional view showing schematically the configuration of a background matrix.
[0019] [00019] Figure 4 is a side cross-sectional view showing the background matrix configuration schematically.
[0020] [00020] Figure 5 is a longitudinal cross-sectional view showing the configuration close to the formation surface of the bottom matrix.
[0021] [00021] Figure 6 is a longitudinal cross-sectional view that shows schematically the configuration of the bottom matrix that is used in a hot compression forming matrix of a second modality.
[0022] [00022] Figure 7 is a side cross-sectional view showing schematically the configuration of the bottom matrix that is used in a hot compression forming matrix of a second modality.
[0023] [00023] Figure 8 is a view to explain the state where the top matrix is pushed down to a limit of the bottom matrix.
[0024] [00024] Figure 9 is a longitudinal cross-sectional view showing schematically the configuration of the background matrix according to a modification of the second modality.
[0025] [00025] Figure 10 is a side cross-sectional view showing schematically the configuration of a bottom matrix according to a modification of the second modality.
[0026] [00026] Figure 11 is a longitudinal cross-sectional view that shows schematically the configuration of a bottom matrix according to a modification of the second modality. DESCRIPTION OF MODALITIES
[0027] [00027] Below, with reference to the figures, the modalities of the present invention will be explained in detail. Note that, in the following explanation, similar components are assigned the same reference numbers.
[0028] [00028] Figure 1 is a side view showing schematically the configuration of a hot compression forming apparatus 1 according to the first embodiment of the present invention. Figure 2 is a plan view showing schematically the configuration of the hot compression forming apparatus 1.
[0029] [00029] As will be understood from figure 1 and figure 2, the hot compression forming apparatus 1 comprises a hot pressing forming matrix 10 to form a sheet of steel K, a refrigerant power supply 11 which the refrigerant (in the present embodiment, water) is fed to the hot compression forming matrix 10, a gas power source 12 that feeds gas (eg compressed air) used to be blown into the hot compression forming matrix 10 , and a control unit 13 that controls the hot compression forming apparatus 1.
[0030] [00030] The hot compression forming die 10 has a bottom die 20 which is arranged on a lower side and a top die 21 which is arranged on an upper side. The bottom matrix 20 is arranged on the base 22. The top matrix 21 is arranged vertically above the bottom matrix 20 and facing the bottom matrix 20 and is configured to be able to be lifted by a lifting mechanism 23 in the vertical direction. The lifting mechanism 23 performs a lifting operation based on a control signal from the control unit 13.
[0031] [00031] The bottom die 20 is provided with positioning pins 30 for positioning with pre-drilled holes P which are provided preliminarily in the steel sheet K. The positioning pins 30 are arranged to pass through the interior of the die. bottom 20 and extend vertically upward from the top surface of the bottom matrix 20.
[0032] [00032] The top ends of the positioning pins 30 are formed in substantially conical shapes. For this reason, by fitting the top ends of the substantially conical shapes into the pre-drilled holes P of the steel sheet K, as shown in figure 1 by the dashed line, the steel sheet K is supported and positioned. In particular, since the top ends of the positioning pins 30 are substantially tapered, appropriately adjusting the sizes of the pre-drilled holes P of the steel sheet K, the steel sheet K can be supported in a state with a clearance H a predetermined distance from the bottom matrix 20.
[0033] [00033] In addition, the positioning pins 30 are slidable with respect to the bottom matrix 20. In addition, they are supported on the top surface of the base 22 by means of polarization means not shown (for example, springs). For this reason, if the top die 21 goes down and the positioning pins 30 are pushed down, the steel sheet K is pushed down along with the positioning pins 30.
[0034] [00034] Figure 3 is a cross-sectional view when viewing the bottom matrix 20 from the front direction, while figure 4 is a cross-sectional view when viewing the bottom matrix 20 from the side direction. As shown in figure 3 and figure 4, the bottom matrix 20 has a forming surface 20a that contacts the steel sheet K at the time of compression. Within the bottom matrix 20, a distributor 40 is provided which is connected to the refrigerant power supply 11 and the gas power supply 12, and a plurality of tubes 41 that run through the interior of the bottom matrix 20 between the dispenser 20 and forming surface 20a. In the bottom matrix 20, thus configured, the fluid that is fed from the refrigerant power supply 11 and the gas power supply 12 is fed through the distributor 20 and the tubes 41 to the surface of the steel sheet K. Therefore , the ends of the tubes 41 on the sides of the forming surface 20a act as feeding holes 41a that feed fluid to the surface of the steel sheet K. Note that, in the example shown in figure 3, to facilitate the understanding of the drawing, the feeding holes 41a are provided only on the left and right sides of the bottom matrix 20 and are not provided in the center, but at present they are preferably arranged equally over the entire forming surface 20a including the central part.
[0035] [00035] Furthermore, on the forming surface 20a of the bottom matrix 20, as shown in figure 5, a plurality of independent projections of constant height 42 are formed over the entire surface of the region facing the steel sheet K. Speaking inversely , the forming surface 20a of the bottom die 20 is formed with recesses that are formed between the projections 42 on the entire surface of the region facing the steel sheet K. Because of this, when the top die 21 pushes down the bottom surface of the steel sheet K to a position that contacts the forming surface 20a of the bottom die 20, a gap is formed between the forming surface 20a and the bottom surface of the steel sheet K between the plurality of projections 42 For this reason, by feeding the coolant loosely from tubes 41, steel sheet K can be cooled quickly.
[0036] [00036] The distributor 40, as shown in figure 4, is connected via a refrigerant supply tube 45 to the refrigerant supply source 11 and is connected via a gas supply tube 46 to the gas supply source 12 The refrigerant supply pipe 45 is provided with a valve 47, while the gas supply pipe 46 is provided with a valve 48. Valve 47 and valve 48 are connected to control unit 13. Control unit 13 it is used to operate valve 47 and valve 48 to open and close. Therefore, by operating valve 47 which is supplied to the refrigerant supply pipe 45, the supply and interruption of the refrigerant is controlled, while operating valve 48 which is supplied to the gas supply pipe 46, the supply and interruption of the refrigerant. gas are controlled.
[0037] [00037] Note that, in the example shown in figures 1, 2 and 4, the refrigerant supply pipe 45 and gas supply pipe 46 are provided with valves 47 and 48. However, the connector 49 the refrigerant supply pipe 45 and the gas supply pipe 46 can be provided with a three-way valve to control the fluid that is fed to the distributor 40.
[0038] [00038] Furthermore, in the present embodiment, the forming surface 20a of the bottom matrix 20, as shown in figure 3 and figure 4, is provided with exhaust suction holes 50 which sucks in the refrigerant, etc. which is fed through the feed holes 41a to the surface of the steel sheet K and discharges the refrigerant around the surface of the steel sheet K. The exhaust suction holes 50 are connected to a suction tube 51, while the suction 51 is connected, for example, to a vacuum pump or other exhaust mechanism 52.
[0039] [00039] Note that, to make it possible for soda, etc. that is fed from the feed holes 41a, is discharged smoothly through the exhaust suction holes 50, the exhaust suction holes 50 must be at atmospheric pressure or less. That is, for example, if you open the end of the suction tube 51 on the side opposite the exhaust suction holes 50 into the atmosphere, the foreign coolant around the surface of the steel sheet K will be discharged outside the die. For this reason, the exhaust mechanism 52 does not necessarily need to be provided.
[0040] [00040] Note that, in the present modality, water is used as the refrigerant that is fed from the refrigerant 11 power supply, but in addition to water, antirust oil that has a rust prevention function or other refrigerant in the state liquid can also be used. In addition, a mist of water or anti-rust oil, etc. or other refrigerant can be used. In addition, in the present embodiment, as the gas that is fed from the gas supply 12, compressed air is used, but the invention is not limited to this. For example, as long as a gas that is fed at a pressure of atmospheric pressure or more, nitrogen gas or other gas except air can be used. In particular, when using nitrogen as the gas that is fed from the gas power source 12, the surroundings of the steel sheet K can be in a non-oxidizing atmosphere and therefore the rust of the steel sheet K can be still suppressed.
[0041] [00041] Next, the method of using the so configured hot compression forming apparatus 1 to form the steel sheet K by hot compression will be explained below.
[0042] [00042] First, when starting the compression formation of the steel sheet K, valves 47 and 48 are closed. Because of this, the tubes 41 of the bottom matrix 20 are not supplied with either refrigerant or gas. In such a state, a sheet of steel K which has been heated to a predetermined temperature (for example, 700oC to 1000oC) is placed by a transport device (not shown) between the bottom matrix 20 and the top matrix 21. Specifically, the steel sheet K is placed over the positioning pins 30 of the bottom die 20 so that the pre-drilled holes P fit into the positioning pins 30.
[0043] [00043] Then, the top die 21 is moved in the vertical direction to bring the bottom die 20 closer together to compress the steel sheet K that is trapped between the top die 21 and the bottom die 20. When the top die 21 descends to the limit of the bottom die the compression operation is completed, the valve 47 which is provided to the refrigerant supply pipe 45 is opened. When the valve 47 is opened, the refrigerant is fed from the refrigerant supply source 11 through the refrigerant supply tube 45, the distributor 40, the tubes 41 and the supply holes 41a to the surface of the steel sheet K. Because of this, the K steel sheet begins to cool quickly.
[0044] [00044] Furthermore, if the top die 21 is retained at the bottom die limit for a certain time and the steel sheet K is cooled to a temperature of, for example, 200oC or less, then valve 47 which it is provided to the refrigerant supply pipe 45 is closed and the valve 48 that is provided to the gas supply pipe 46 is opened. If valve 48 is opened, gas is blown from the gas supply 12 through gas supply tube 46, distributor 40, tubes 41 and supply holes 41a to the surface of steel sheet K. On this occasion, if the pressure of the gas that is fed from the feed holes 41a is too high, the pressurization energy becomes high, while, conversely, if too low the gas is no longer ejected uniformly from the feed 41a, and therefore the pressure is set at 0.1 to 1.0 MPa, preferably 0.3 to 0.7 MPa, more preferably 0.4 to 0.5 MPa. The flow rate is determined by the gas pressure and the shape of the nozzle and is set at 20 to 2000 ml / s, preferably 300 to 1000 ml / s, more preferably 400 to 700 ml / s.
[0045] [00045] In addition, the temperature of the gas which is fed from the feed holes 41a is fixed at 200oC or less, preferably at ordinary temperature. That is, the steel sheet K is cooled by the refrigerant below 200oC or less, so it is cooled down sharply. For this reason, if you blow 200oC or more gas, the steel sheet K reaches a temperature of 200oC or more, the steel sheet K is annealed, and the hardness drops.
[0046] [00046] Furthermore, in the present embodiment, together with the closing of the valve 47 or the opening of the valve 48, the top die 21 is increased to the limit of the top die. If the top die 21 increases in this way, the positioning pins 30 that have been pushed down by the top die 21 increase and the steel sheet K is separated from the forming surface 20a of the bottom die 20. Because of this , a gap is formed between the bottom surface of the steel sheet K and the forming surface 20a of the bottom die 20.
[0047] [00047] In addition, if gas is blown onto the surface of the steel sheet K and thereby finish removing the coolant on the surface of the steel sheet K, the formed steel sheet K is removed by the transport apparatus (not shown) from positioning pins 30 and is discharged from the hot compression forming apparatus 1. In addition, a new tested steel sheet K is placed by a transport device (not shown) on positioning pins 30 of the hot compression forming apparatus 1 and this series of steps in the hot compression forming operation is repeated.
[0048] [00048] Next, the advantageous effects of the hot compression forming matrix and the hot compression forming method according to the above modality will be explained.
[0049] [00049] According to the above modality, in the state with a steel sheet K placed in the same hot compression forming die 10, the surface of the steel sheet K was fed with refrigerant from the refrigerant power supply 11 and blown with gas from the gas power supply 12. For this reason, it is possible to blow gas onto the surface of steel sheet K immediately after interrupting the supply of refrigerant to the surface of steel sheet K. For this reason, it is possible to quickly remove the refrigerant that has been deposited on the surface of the K steel sheet.
[0050] [00050] Note that the time taken to remove the refrigerant that is deposited on the surface of the steel sheet K depends on the temperature and thickness of the sheet of a formed steel sheet K (that is, on the heating capacity of the steel sheet K). For example, if when making the pressure of the gas that is fed from the 41a 0.4MPa supply holes, when making the flow rate 60 to 70 ml / s, and when making the temperature a common temperature, if the temperature of a sheet thickness of 1.4 mm the steel sheet K just after compression is about 150oC, it is possible to remove the refrigerant that was deposited on the steel sheet K in about 3 s from the beginning of the gas blow. In addition, in the case of 1.2 mm sheet thickness of steel sheet K, it is possible to remove the refrigerant that has been deposited on steel sheet K in about 7 s from the beginning of the gas blow.
[0051] [00051] In this way, it is possible to quickly remove the refrigerant that has been deposited on the surface of the steel sheet K and, therefore, it is possible to suppress uneven cooling of the steel sheet K due to the refrigerant remaining on the surface of the steel sheet K in unevenly. Consequently, it is possible to keep the resistance of steel sheet K from becoming uneven. In addition, even when using water as a coolant, it is possible to prevent rust from forming due to the coolant that remains on the surface of the K steel sheet.
[0052] [00052] Furthermore, after being compressed by the hot compression forming die 10, the surface of the steel sheet K is sprayed with gas, so the crust that has formed on the surface of the steel sheet K due to compression , etc. can be removed. In particular, if the coolant is removed from the surface of the steel sheet K and the surface of the steel sheet K is dried, the crust peels off easily and, therefore, in the present embodiment, the crust can be removed more effectively.
[0053] [00053] Furthermore, in the above embodiment, the gap H is formed when the gas is blown over the surface of the steel sheet K. Such gap H being formed, the gas that is fed from the gas power source 12 through of the feed holes 41a is easily exhausted and the flow rate of the gas passing through the surface of the steel sheet K can be increased. Because of this, the refrigerant that has been deposited on the surface of the steel sheet K can be removed effectively. Note that if the clearance H is too small, it becomes difficult to extract the surrounding gas while conversely if too large, the blown gas will be dispersed and the blow effect will fall and therefore the clearance is 1 mm to 100 mm or so , preferably 5 to 20 mm, more preferably 8 to 15 mm.
[0054] [00054] Next, referring to figure 6 and figure 7, a second embodiment of the present invention will be explained. The configuration of the hot compression forming apparatus of the second embodiment is basically similar to the configuration of the hot compression forming apparatus of the first embodiment. However, in the hot compression forming apparatus of the second embodiment, the configuration of the bottom matrix 60 differs from the configuration of the bottom matrix 20 of the first embodiment.
[0055] [00055] Figure 6 is a longitudinal cross-sectional view similar to Figure 3 which schematically shows a bottom matrix 60 which is used in the hot compression forming apparatus of the second embodiment, while Figure 7 is a cross-sectional view. side similar to figure 4 which shows schematically the bottom matrix 60. As shown in figure 6 and in figure 7, the bottom matrix 60 has an outer matrix 61 that has a forming surface 61a that contacts the steel sheet K and a internal matrix 71 which is provided slidably with respect to the external matrix 61 within the external matrix 61. In the present embodiment, the internal matrix 71 has a rectangular cross-sectional shape. Note that, in figure 7, for the sake of illustration, the external matrix 61 is drawn slightly shorter than the internal matrix 71 in the lateral direction of figure 7.
[0056] [00056] The outer die 61 is provided with a plurality of outer tubes 64 running from the forming surface 61a which contacts the steel sheet K to the sliding surface 63 between the outer die 61 and the inner die 71, through the inner of the outer die 61. The ends of the outer tubes 64 on the sides of the forming surface 61a, in the same way as the feed holes 41a of the first embodiment, act like the feed holes 64a that feed the fluid to the surface of the steel sheet K. Therefore, it can be said that the outer tubes 64 are arranged between the feed holes 64a and the sliding surface 63. The forming surface 61a, like the forming surface 20a of the first embodiment, is formed with a plurality of projections.
[0057] [00057] In addition, the outer matrix 61 is supported by elastic members 65 on base 22. Like elastic members 65, for example, springs of predetermined stroke lengths are used. For this reason, if the top die 21 descends and pushes the outer die 61, the outer die 61 is guided by the sliding surface 63 while being pushed down. The guiding mechanism for sliding the outer matrix 61 and the inner matrix 71 can be provided separately from the sliding surface 63.
[0058] [00058] Within the inner matrix 71, a plurality of first inner tubes 72, a plurality of second inner tubes 73, a first distributor 74 that connects the plurality of first inner tubes 72 and the refrigerant power supply 11, and a second distributor 75 connecting the plurality of second inner tubes 73 and the gas supply 12 are provided. The first inner tubes 72 are provided in the same number as the outer tubes 64 of the outer die 61 and run from the sliding surface 63 to the first distributor 74 through the interior of the inner die 71. The second inner tubes 73 are also provided in the same number with the external tubes 64 of the external matrix 61 and run from the sliding surface 63 to the second distributor 75 through the interior of the internal matrix 71.
[0059] [00059] The first distributor 74, as shown in figure 7, connects through the refrigerant supply tube 45 to the refrigerant supply source 11 and therefore acts as a connecting piece that is connected to the supply source of refrigerant. refrigerant 11. On the other hand, the second distributor 75 connects through the gas supply tube 46 to the gas supply source 12 and therefore acts as a connecting piece that is connected to the gas supply source 12. The refrigerant supply pipe 45 is provided with valve 47, while the gas supply pipe 46 is provided with valve 48. Valve 47 and valve 48, in the same way as the first embodiment, are connected to the refrigeration unit. control 13. Control unit 13 is used to operate valve 47 and valve 48 to open and close.
[0060] [00060] The ends of the second inner tubes 73 on the sides of the sliding surface 63 are arranged to be aligned with the ends of the outer tubes 64 on the sides of the sliding surface 63 in the state where the outer die 61 is not pushed by the die top 21. Conversely, the ends of the first inner tubes 72 on the sides of the slide surface 63 are arranged so as not to be aligned with the ends of the outer tubes 64 on the sides of the slide surface 63 in the state where the outer die 61 does not. is pushed by the top die 21. Therefore, in the state where the outer die 61 is not pushed by the top die 21, only the second inner tubes 73, that is, only the gas supply 12, is connected to the outer tubes 64.
[0061] [00061] On the other hand, the ends of the first inner tubes 72 on the sides of the slide surface 63 are arranged to be aligned with the ends of the outer tubes 64 on the sides of the slide surface 63 in the state where the outer die 61 is pushed down to the bottom die limit by the top die 21. Conversely, the ends of the second inner tubes 73 on the sides of the slide surface 63 are arranged so as not to be aligned with the ends of the outer tubes 64 on the sides of the sliding surface 63 in the state where the outer die 61 is pushed down to the bottom die limit by the top die 21. Therefore, the state where the outer die 61 is pushed down to the bottom die limit by the die top 21, only the first inner tubes 72, that is, only the refrigerant power supply 11, is connected to the outer tubes 64.
[0062] [00062] In other words, in the present embodiment, the outer die 61 and the inner die 71 slide with respect to each other connected with the operation of the top die 21. Because of this, it is possible to switch between a state where the outer tubes 64 are connected to the first inner tubes 72 and a state where they are connected to the second inner tubes 73. Note that when with only the metal surfaces sliding together, it is difficult to seal the refrigerant against the pressure of the refrigerant, the ends of the inner tubes 72 and 73 on the sides of the sliding surface 63 or the ends of the outer tubes 64 on the sides of the sliding surface 63 can be provided with rubber rings or other sealing members.
[0063] [00063] Next, the method of using the so configured hot compression forming apparatus to form the K steel sheet with hot compression will be explained.
[0064] [00064] First, when starting the compression formation of the steel sheet K, the valve 48 which is supplied to the gas supply pipe 46 is closed and the valve 47 which is provided in the refrigerant supply pipe 45 is opened. On this occasion, the outer die 61 is not pushed by the top die 21 and therefore is lifted by the elastic members 65. Therefore, the inner tubes 64 are connected with the second inner tubes 73. For this reason, even if valve 47 is open, the refrigerant power supply 11 feeds refrigerant to the first inner tubes 72 at a predetermined pressure and does not feed refrigerant to the outer tubes 64. In other words, the refrigerant that is fed to the first inner tubes 72 is interrupted by the sliding surface 63 of the outer die 61 and is filled to a predetermined pressure at the ends of the first inner tubes 72. On the other hand, valve 48 is closed and therefore, even if the second inner tubes 73 and outer tubes 64 are connected, the tubes external 64 are not supplied with gas.
[0065] [00065] Next, a sheet of high temperature K steel is placed by a transport device (not shown) on the positioning pins 30 of the bottom die 60. Then, the top die 21 is moved in the vertical direction in order to approach the bottom matrix 60, for example, as shown in figure 8, to bring it down to the limit of the bottom matrix. Together with this, the steel sheet K and the outer die 61 of the bottom die 60 are pushed down in the vertical direction and the steel sheet K which is trapped between the top die 21 and the bottom die 60 is compressed.
[0066] [00066] On this occasion, the outer die 61 is pushed down to the limit of the bottom die, whereby the outer tubes 64 of the outer die 61 are disconnected from the second inner tubes 73 of the inner die 71 and are connected to the first inner tubes 72. Because of this, the refrigerant that was filled at the end of the first inner tubes 72 is immediately fed from the outer tubes 64 to the steel sheet K. The steel sheet K begins to be quickly cooled right after the sheet steel K be compressed.
[0067] [00067] Furthermore, if the outer die 61 is pushed down to the limit of the bottom die and whereby the outer tubes 64 and the second inner tubes 73 are disconnected, the valve 48 which is provided to the gas supply tube 46 is opened. For this reason, the second inner tubes 73 are fed with gas of a predetermined pressure. In other words, the refrigerant that was fed to the second inner tubes 73 is interrupted by the sliding surface 63 of the outer matrix 61 and is filled at a predetermined pressure from the ends of the second inner tubes 73.
[0068] [00068] Furthermore, if the top matrix 21 is retained at the bottom matrix limit for a certain time and the steel sheet K is cooled to a temperature of, for example, 200oC or less, then the bottom matrix 21 is raised to the top dead center. If the top die 21 is raised to the top die limit, the outer die 61 that has been pushed down to the bottom die limit is pushed vertically upward by the elastic members 65 that support the outer die 61. As a As a result, the outer tubes 64 are disconnected from the first inner tubes 72 and are connected to the second inner tubes 73. For this reason, the refrigerant supply from the outer tubes 64 to the steel sheet K is immediately interrupted. In addition, the gas that has been filled to the ends of the second inner tubes 73 is immediately fed from the outer tubes 64 to the steel sheet K and therefore the gas begins to be blown into the steel sheet K immediately after interrupt the refrigerant supply. On this occasion, the pressure, etc. of the gas is fed from the feed holes 64a are fixed in the same way as in the first embodiment.
[0069] [00069] Furthermore, when the cooler has just been removed from the surface of the steel sheet K by blowing gas on the surface of the steel sheet K, the formed steel sheet K is removed by the conveyor device (not shown) from positioning pins 30 and is discharged from the hot compression forming apparatus. After this, a new heated steel sheet K is placed by the transport apparatus (not shown) on the positioning pins 30 of the hot compression forming apparatus and this series of steps of the hot compression forming operation is repeated.
[0070] [00070] Next, the advantageous effects of the hot compression forming matrix and the hot compression forming method according to the above modality will be explained.
[0071] [00071] According to the present embodiment, the outer tubes 64 and the first inner tubes 72 and second inner tubes 73 are switched to be connected and disconnected making the outer matrix 61 and the inner matrix 71 move relative to each other . Therefore, in the present embodiment, a fluid switching means for switching the fluid that is fed to the plurality of supply ports 64a between a refrigerant and the gas can be said to be provided within the bottom matrix. For this reason, the outer tubes 64 and the first inner tubes 72 and second inner tubes 73 are switched to be connected and disconnected in closed positions to the supply holes 64a that feed fluid (refrigerant and gas) to the K steel sheet. In other words, control can be performed to feed and interrupt the fluid in the closed positions for the forming surface 61a of the outer matrix 61, i.e., the closed positions for the metal sheet K to which the fluid is to be fed.
[0072] [00072] For this reason, in the state where the second inner tubes 73 are closed by the sliding surface 63 of the outer matrix 61, the gas is fed in advance to the second inner tubes 73 to fill the gas to the ends of the second inner tubes 73. After that, the outer matrix 61 can be pushed upwards to connect the outer tubes 64 and the second inner tubes 73. Because of this, the gas that has been filled in the second inner tubes 73 can be quickly blown out from the outer tubes 64 to the steel sheet K. Therefore, compared to the first embodiment, it is possible to blow the gas to the surface of the steel sheet K more quickly after interrupting the supply of refrigerant to the surface of the steel sheet K.
[0073] [00073] Similarly, in the state where the first inner tubes 72 are closed by the sliding surface 63 of the outer matrix 61, the refrigerant is fed in advance to the first inner tubes 72 to fill the refrigerant to the ends of the first inner tubes 72. After this , the outer die 61 can be pushed down to the bottom die limit to connect the outer tubes 64 and the first inner tubes 72. Due to this, the refrigerant that is filled in the first inner tubes 72 can be quickly blown from from the outer tubes 64 to the steel sheet K.
[0074] [00074] Furthermore, for example, in the bottom matrix 60 which is shown in figure 4, for example, the total duct lengths from valves 47 and 48 to the supply orifices 41a closest to valves 47 and 48 ( supply holes on the right side of figure 4) and the total duct lengths for supply holes 41a furthest from valves 47 and 48 (supply holes on the left side of figure 4) differ greatly in length. For this reason, in the positions close to the valves 47 and 48 and the distant positions of the valves 47 and 48, the cooling times of the steel sheet K and the gas blowing times for the steel sheet K differ. In contrast, in the hot compression forming apparatus of the present embodiment, it is possible to obtain similar effects for the case where the valves are provided at the ends of the external tubes 64 on the sides of the sliding surface 63 and, therefore, it is possible to make the extremely small differences in duct lengths compared to the matrix and bottom 60 which is shown in figure 4.
[0075] [00075] Note that the outer tubes 64 of the outer matrix 61 are preferably equal in duct lengths. By making the outer tubes 64 equal in duct lengths, the connection times of the outer tubes 64 and the inner tubes 72 and 73 for the start of supplying refrigerant or gas to the steel sheet K become the same. In this case, it is possible to make the cooling start times and gas blowing start times uniform on the surface of the steel sheet K. As a result, the hardness of the steel sheet K after the formation of hot compression can be uniform over the surface.
[0076] [00076] Note that the background matrix 60 of the second embodiment can be changed in several ways. Below, modifications of the background matrix 60 are shown.
[0077] [00077] In the above embodiments, the outer die 61 which is supported by the elastic members 65 is pushed down by the top die 21, whereby the outer die 61 is slid against the inner die 71. However, if the outer die 61 and the inner matrix 71 can be slid with respect to each other, the inner matrix 71 can be slid and, in addition, both the outer matrix 61 and the inner matrix 71 can be slid. When making the side of the inner die 71, for example, as shown in figure 9, the outer die 61 can be directly arranged on the top surface of the base 22 and the inner die 71 can, for example, be slid by an actuator or another drive mechanism 80 in the up-down direction. In this case, the end time of the compression operation of the steel sheet K and the start time of the refrigerant supply can be controlled separately.
[0078] [00078] In addition, when using the drive mechanism 80, the state where the ends of the outer tubes 64 on the side of the sliding surface 63 are connected with the first inner tubes 72, the state where the ends of the outer tubes 64 in the side of the sliding surface 63 are connected with the second inner tubes 73, and in addition, the state where the ends of the outer tubes 64 on the sides of the sliding surface 63 are not connected to both the first inner tubes 72 and the second inner tubes 73 (i.e., the state where the ends of the outer tubes 64 on the sides of the sliding surface 63 face the inner wall surface of the inner matrix 71) can be switched between. In this case, valves 47 and 48 no longer need to be provided.
[0079] [00079] In addition, in the above embodiments, the matrices 61 and 71 were slid upwards to downward to connect the outer tubes 64 and the inner tubes 72 and 73. However, the arrangements of tubes 64, 71 and 73 and the relative sliding directions of the matrices 61 and 71 are not limited to those of the present modalities and can be fixed freely. For example, when making the dies 61 and 71 slide in the horizontal direction, as shown in figure 10, it is possible to arrange the outer matrix 61 and the inner matrix 71 offset in the horizontal direction and offset in the inner tubes 72 and 73 from the outer tubes 64 correspondents in the horizontal direction. In addition, for example, it is possible to slide the inner matrix 71 in the horizontal direction by the horizontal movement mechanism 85 in order to connect the first inner tubes 72 and outer tubes 64 or connect the second inner tubes 73 and outer tubes. In addition, for example, it is possible to make the inner matrix 71 substantially cylindrical in shape and to slide the inner matrix 71 in the circumferential direction so that inner tubes 72 and 73 and outer tubes 64 are connected.
[0080] [00080] Alternatively, as shown in figure 11, the inner matrix 71 does not need to be provided with the second inner tubes 73 and second distributor 75 and can be provided only with the first inner tubes 72 and first distributor 74. In this case, the first distributor 74, in the same way as distributor 40 of the first mode, can be connected to both the refrigerant power supply 11 and the gas power supply 12. When the internal matrix 71 is configured in this way, the refrigerant supply is initiated using the drive mechanism 80 to slide the internal matrix 71 with respect to the external matrix 61, but the gas supply is initiated by controlling the operation of valves 47 and 48.
[0081] [00081] Note that, in the above modalities, the bottom matrix 60 was configured by an external matrix 61 and an internal matrix 71, but the top matrix 21 can be configured by an external matrix and an internal matrix. Alternatively, both the bottom matrix 60 and the top matrix 21 can be configured by external matrices and internal matrices. In addition, the matrix comprised of external matrix and internal matrix can be used for both the projection matrix and the recessed matrix which are used for compression forming or can be used for both the projection matrix and the matrix in recess.
[0082] [00082] In addition, in the above modalities, the internal matrix 71 was provided only with a single distributor for each type of fluid, but it is also possible to provide a plurality of distributors for each type of fluid. In this case, for example, taking a refrigerant as an example, when the supply of refrigerant to a part of the distributors is interrupted, it is possible to interrupt the refrigerant supply from the first inner tubes 72 and outer tubes 64 that are connected to the first distributors 74 for which the supply has been interrupted, and continue to supply refrigerant from the first inner tubes 71 and outer tubes 64 remaining. That is, it is possible to selectively interrupt the refrigerant supply. Because of this, it is possible to control the portions of the steel sheet K that are fed with the refrigerant and change the hardness in the plane of the steel sheet K.
[0083] [00083] Furthermore, in the above embodiments, the hot compression forming operation of the steel sheet K as explained, but the invention can also be used to hot-form a metal sheet except the steel sheet.
[0084] [00084] Note that the present invention has been explained in detail based on the specific modalities, but a person skilled in the art can make various changes, corrections, etc. without leaving the claims and concept of the present invention. INDUSTRIAL APPLICABILITY
[0085] [00085] The present invention is useful when forming steel sheet by hot compression. REFERENCE LISTING 1 hot compression forming machine 10 hot compression forming matrix 11 refrigerant power supply 12 gas power supply 13 control unit 20 background matrix 20th forming surface 21 top matrix 22 base 23 lifting mechanism 30 positioning pin 40 distributor 41 tube 42 projection 60 background matrix 61 external matrix 63 sliding surface 64 outer tube 71 internal matrix 72 first inner tube 73 second inner tube 74 first distributor 75 second distributor K sheet steel Pre-drilled hole

权利要求:
Claims (10)
[0001]
Hot compression forming method that forms a heated metal sheet (K) using a forming matrix (10) that is comprised of a first matrix (20) and a second matrix (21), characterized by the fact that comprises the steps of: arranging the heated metal sheet (K) between said first matrix (20) and said second matrix (21); making said first die (20) and said second die (21) approach to compress the metal sheet (K) that is stuck between the two dies (20, 21); after compressing said metal sheet (K), feeding refrigerant in liquid or fog state to the surface of the metal sheet (K) which is trapped between the two dies (20, 21) through a plurality of feed holes (41a, 64a) which are provided with at least one of said first matrix (20) and said second matrix (21); and, after said refrigerant finishes being fed, blow a gas through said plurality of feeding holes (41a, 64a) on the surface of the metal sheet (K).
[0002]
Hot compression forming method according to claim 1, characterized in that said first matrix and second matrix (20, 21, 60) are separated before feeding said gas to the surface of the metal sheet (K).
[0003]
Hot compression forming method according to claim 1 or 2, characterized in that a fluid switching means for switching said refrigerant and said gas which are fed to said plurality of supply ports (41a, 64a) it is provided within at least one of said first matrix and second matrix (60).
[0004]
Hot compression forming method according to claim 3, characterized by the fact that at least one of said first die and said second die (60) has an external die (61) in which said feed holes (64a) are provided and an internal die (71) which is slidably arranged within said external die (61); said external matrix is provided in its interior with external tubes (64) which are arranged between a sliding surface (63) between the external matrix (61) and said internal matrix (71), and said feeding holes (64a); said internal matrix (71) is provided inside with first internal tubes (72) which are arranged between said sliding surface (63) and a connection part which is connected to a refrigerant power supply (11) and with seconds inner tubes (73) which are arranged between said sliding surface (63) and a connection part which is connected to a gas supply source (12); and said fluid switching means causes said external matrix (61) and said internal matrix (71) to slide relative to each other to connect said external tubes (64) with the first inner tubes (72) or second inner tubes (73) and thereby switching between said refrigerant and said gas which is fed to said plurality of supply ports (64a).
[0005]
Hot compression forming method according to any one of claims 1 to 4, characterized in that said refrigerant is either water or anti-rust oil.
[0006]
Hot compression forming matrix (60) that compresses and cools a heated metal sheet (K), characterized by the fact that it comprises: an external die (61) provided with feeding holes that feed fluid to said sheet of metal; and an internal matrix (71) which is slidably arranged within said external matrix (61), wherein said external matrix (61) is provided inside with external tubes (64) which are arranged between a sliding surface (63) between the external matrix (61) and said internal matrix (71) and said feeding holes ( 64a); said internal matrix (71) is provided inside with first internal tubes (72) which are arranged between said sliding surface (63) and a connection part which is connected to a refrigerant power supply (11) and with seconds inner tubes (73) which are arranged between said sliding surface (63) and a connection part which is connected to a gas supply source (12); and said outer tubes (64), first inner tubes (72), and second inner tubes (73) are formed so that said outer tubes (64) can be switched between at least one state connected to the first inner tubes (72) and one state connected to the second inner tubes (73) causing said outer matrix (61) and said inner matrix (71) to move with respect to each other.
[0007]
Hot compression forming matrix (60), according to claim 6, characterized by the fact that said external tubes (64), first internal tubes (72) and second internal tubes (73) are formed so that said tubes external (64) can be switched between a state connected to the first internal tubes (72), a state connected to the second internal tubes (73), and a state not connected to the two internal tubes (72, 73), making said external matrix ( 61) and said internal matrix (71) move with respect to each other.
[0008]
Hot compression forming matrix (60) according to claim 6 or 7, characterized by the fact that the duct lengths of the external tubes (64) are the same.
[0009]
Hot compression forming matrix (60) according to any one of claims 6 to 8, characterized in that the matrix (60) which is comprised of said internal matrix (71) and said external matrix (61) is used as at least one of a top die and a bottom die for compression forming.
[0010]
Hot compression forming matrix (60) according to any one of claims 6 to 9, characterized by the fact that said refrigerant is any one of water, an anti-rust oil, and mists thereof.

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同族专利:

公开号 | 公开日

WO2012161192A1|2012-11-29|

KR101525721B1|2015-06-03|

CA2836257A1|2012-11-29|

CA2836257C|2018-08-14|

EP2716378B1|2016-02-24|

US9433989B2|2016-09-06|

RU2552819C1|2015-06-10|

BR112013030021A2|2016-09-13|

TW201306962A|2013-02-16|

KR20130140888A|2013-12-24|

CN103547390B|2015-11-25|

JPWO2012161192A1|2014-07-31|

MX2013013240A|2014-01-08|

TWI501823B|2015-10-01|

ZA201308711B|2014-07-30|

US20140069162A1|2014-03-13|

ES2565391T3|2016-04-04|

EP2716378A1|2014-04-09|

CN103547390A|2014-01-29|

JP5418728B2|2014-02-19|

EP2716378A4|2014-12-24|

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法律状态:
2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

2019-09-10| B25D| Requested change of name of applicant approved|Owner name: NIPPON STEEL CORPORATION (JP) |

2020-01-07| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

2020-11-03| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

2021-01-12| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 22/05/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

JP2011-115176|2011-05-23|

JP2011115176|2011-05-23|

PCT/JP2012/063075|WO2012161192A1|2011-05-23|2012-05-22|Hot press molding method and hot press molding die|

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