• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PROCESS AND DEVICE FOR THE PRODUCTION OF MILLED METAL PLATES. The present invention relates to a process and a device for the production of grooved tubes (4; 104) of sheet metal (3), especially thick sheet metal, with a sheet metal being fed into a press. tube molding (1), where, resting on a lower tool (6), it is molded by an upper tool (9) that can be lifted and lowered by applying a bending force progressively to the grooved tube (4; 104) with edges longitudinal lines opposed to a posterior longitudinal seam weld with a slit (11; 111). In order to obtain widely rounded grooved tubes (104) with a narrow groove or slit (111), a grooved tube is initially produced with a non-round preform (13), as long as at least one step bending acting with respect to the medium predetermined by the longitudinal axis of the upper tool (9) immersing in the metal plate (3) progressively molded respectively to the left and right on the inside of the metal plate (3), a lesser deformation is carried out in relation to the other bending steps, and then, by applying a closing force (F) acting from outside on the preform (13) not round in (...).
    公开号:BR102012012992B1
    申请号:R102012012992-2
    申请日:2012-05-30
    公开日:2021-03-16
    发明作者:Mario Thome；Manfred Kolbe；Jochen Vochsen
    申请人:Sms Meer Gmbh；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a process for the production of grooved tubes of sheet metal, especially thick sheet metal, where a sheet metal is added to a tube molding press, in which, resting on a lower tool, is molded by an upper tool that can be lifted and lowered by applying a gradually bending force to the grooved tube with longitudinal edges opposed to a posterior longitudinal seam weld with a slit. The invention also relates to a device for carrying out the process.
    [0002] The process applied in practice for the production of sheet metal tubes includes the tube pressing process with molding or bending steps in tube presses. A tube bending or molding press usually has a bottom tool on a base frame consisting of two supporting or bending bodies arranged side by side in a lateral distance and an upper tool vertically adjustable from above against the bottom tool, supported by a device of liftable and lowerable bending, extending along the entire length of the sheet metal, with which a bending force can be applied on the sheet metal resting on the lower tool.
    [0003] For the production of a tube or a large tube by the progressive molding process, several successive work steps are required. The sheet metal in the first stage is curved at the longitudinal edges, usually in a separate edge bending press. The pre-bending of the longitudinal edges takes place so that the radius of the tube is uniformly shaped when deforming for the grooved tube in the region of the future seam, where the longitudinal edges of the curved sheet metal for the tube are uniformly shaped to oppose each other to welding the longitudinal seam with a slit.
    [0004] The sheet metal thus previously bent is then inserted into the tube molding press and subjected to the bending process itself. By pressing down the upper part of the press, a bending force is applied to the sheet metal, and under the action of the bending device and the upper molding tool, supported by it, a deformation of the sheet metal is established. This process is repeated several times until the sheet metal has been deformed into the grooved tube.
    [0005] By DE 42 15 807 C2 a tube bending or tube molding press made in frame construction mode became known. The device performed as a bending tool is guided vertically in lateral uprights of the frame. This upper bending tool is fixed mobile in piston-cylinder units in cardan to a small extent and is supported by them against the frame crosspiece. The support bodies of the bending tool are supported by a table, also supported by piston-cylinder units, which act coaxially to upper piston-cylinder units. The piston-cylinder units acting in mutual opposition must prevent the table from bending, even if the lower frame header bends under the workload of the press. To do this, individual piston-cylinder units are activated with more or less pressure.
    [0006] A large remaining gap in the groove of about 130 to 170 mm was found to be very problematic during the progressive molding process, influenced by the width of the bending device, which remains especially in thick wall tubes of for example 40 mm and, in addition, stresses in the grooved tube. A large groove width requires high closing forces on the stitched welding device and, due to the high stresses on the stitched pipe as well as residual stresses on the finished welded pipe, there is a danger of rupture of the stitching or weld seam. With markedly wide groove widths, the experienced machine operator is enabled by repeatedly pressing the tube molding press manually to have the groove closed as much as possible. This procedure not only takes a long time with a corresponding reduction in yield, but it cannot be performed with good reproducible quality.
    [0007] Therefore, the invention aims to provide a process and an installation of the type mentioned at the beginning without the mentioned disadvantages, especially also in thin-walled and small tubes in diameter, for example of about 800 mm, to provide in a manner simple production of circular cylindrical grooved tubes with reproducible quality.
    [0008] This objective is achieved with a process according to the invention by the fact that initially a grooved tube is produced with a non-round preform, in that at least in a bending step acting in relation to the medium predetermined by the axis lengthwise of the upper tool immersing in the progressively molded sheet metal respectively to the left and right on the inner side of the sheet metal, a lesser deformation is carried out in relation to the other bending steps, and then, by applying a closing force acting from outside on the non-round preform in specifically less deformed regions respectively on both sides of the medium, the finished grooved tube is molded.
    [0009] In so far as this is intentionally produced a non-round preform, cut to size, with partially smaller deformation, for example with a curvature of 12 ° instead of a curvature of 24 °, a mold can be molded wide circular grooved tube geometry with minimal groove. The basic condition is thus created by the less deformed regions so that the closing force then applied from the outside then also works in these less deformed regions clearly with greater support than in the other pipe segments and, as a result, leads to a widely grooved pipe. circular round with closed slit as narrowly as desired. Unlike relying on the experience of the machine operator, with unchanged quality, both the reproducibility and performance are improved.
    [00010] For both partially non-round deformation as well as for final or finishing molding, two bending steps or two pressing operations can be sufficient, namely, even when final molding with the closing force applied respectively to the left and to the left. right of the slot or groove.
    [00011] An advantageous measure according to the invention provides that the non-round preform is positioned in the manufacturing step before applying the closing force by rotating it clockwise or counterclockwise. Depending on the position, the closing force is thus introduced into the non-rounded preform on the left or right next to the groove or slot.
    [00012] According to a preferred proposal of the invention, the least deformed region to the right of the middle is rotated to a position of approximately 3 hours and the least deformed region to the left of the medium to a position of approximately 9 hours. With this previous positioning of the non-round preform on the support bodies of the lower tool, a very high bending moment can be obtained for the finishing molding.
    [00013] The purpose that serves as the basis for the invention is achieved with a device by the fact that for the deformation of the sheet metal for a non-round preform and then deformation for the grooved tube, a lower tool is foreseen with reversible means in its direction of rotation and a punch that can be activated from outside against the positioned preform. The finished grooved tube can thus be produced from the sheet metal in just one tube forming machine or press. The reversal of the direction of rotation then allows to position the non-round preform exactly in such a way that the closing force acts on the event site, namely, on both sides of the groove. Thus, the bending device of the tube molding press can also be used to apply the closing force from outside on the preform. Optionally, the press can be retrofitted with a press punch.
    [00014] A preferred embodiment of the invention to increase production yield provides that at least one tube molding press producing a non-round preform is post-connected with a closing press, which features the lower tool executed with reversible means in its direction of rotation and as a superior tool the punch that can be activated from outside against the positioned non-round preform. In the production flow, this follows the tube molding press, from which the non-round mold is ejected, a closing press, in which the adduced non-round preform is deformed in at least two successive steps, respectively to the direction and on the left next to the groove or slot for a finished grooved tube. The non-round pre-molding of the sheet metal can thus be carried out in a location independent of the final deformation for the grooved tube.
    [00015] The rotating means of the lower tool are executed, according to a proposal of the invention, like two rollers arranged with mutual distance, activated in rotation. The reversal of the direction of rotation of the rollers allows the non-round preform to be positioned for ready molding with optimum application of force. The time course on the one hand when pre-molding on the tube molding press and, on the other hand, the finishing on the closure press allows a post-connected closure press to serve two tube molding presses.
    [00016] One configuration of the invention provides for the rotatable rollers to be mounted with spring. The support of the non-round mold on the lower closing press tool can be improved by a stationary support body, provided between the rollers.
    [00017] Other features and details of the invention are apparent from the claims and the description below of an example of carrying out the invention represented in the drawings based on two individual presses. Show:
    [00018] Figure 1 - schematically, the gradual deformation (a) of a sheet metal for a grooved tube (b) in a tube molding press according to the current state of the art and in a diagram (c) in a example of predetermined dimension the finished grooved tube;
    [00019] Figure 2 - schematically, the production of a grooved tube according to the invention by producing a non-round preform, cut to size, in a tube molding press (a) usual, the production of a tube ready groove of the non-round preform in a closure press (b) post-connected to the tube molding press and, in a diagram with the dimensions as shown previously in Figure 1 c, the finished grooved tube (c), produced according to the invention;
    [00020] Figure 3 - as a detail of Figure 2, the closing press with the non-round preform inserted in it; and
    [00021] Figure 4 A, 4 B - the molding or posterior deformation of the non-round preform of the tube molding press represented schematically in at least two bending stages of the closing press, namely, in a first bending stage by activating the force of the non-round preform on the right next to the groove or slot (Figure 4 A) and after rotating the non-round preform in a second bending step by activating the force on the left next to the groove or slot (Figure 4 B)
    [00022] In a tube molding press 1 that has long been known, according to Figure 1 a metal plate 3 is molded or deformed, provided with edge curves 2 (according to Figure 3) on its longitudinal sides, in stages, for a grooved tube 4 ready. The sheet metal 3 then rests on a lower tool 6 with two support bodies 5 a, 5 b spaced apart, the deformation force being applied by a lifting and lowering upper tool 9, performed as a bending device with a molding tool arranged on its forward front end. The sheet metal 3 to be molded or deformed is guided by two side supports 10 a, 10 b side, of which the support 10 a is linearly displaceable and moves the required sheet segment forward to the next molding step. The finished grooved tube 4, as shown in Figure 1c, has a large groove or slot 11, which makes it extremely difficult to weld to a closed tube, welded in longitudinal seam, as shown in dashed lines in Figure 1c.
    [00023] The deformation of a metal plate 3 into a grooved tube 104, which has a markedly smaller groove or slit 111 (according to Figure 2 c), is performed according to Figure 2 a on a tube molding press 1 previously described . But with the proviso that in a region of the sheet metal located respectively to the right and to the left of the longitudinal axis of the curving device 7 and, thus, next to the groove or slot 11, the curving step is performed with a curvature smaller than in the other bending steps. There are, therefore, definitely two less deformed regions corresponding to the respective bending step, as shown in Figure 3, so that a non-round preform 13 is obtained, also cut to size for the finishing deformation.
    [00024] The non-round preform 13 produced in a first stage in the tube molding press 1, after transport or displacement of the tube molding press 1, is added to a post-connected closing press 14 in the process manufacturing, as shown in Figure 2 b. The closing press 14 features a lower tool 15, which consists of two rollers 16a, 16b provided spaced apart, reversibly driven in their direction of rotation, as indicated in Figure 2b by the double arrows, and on a stationary support body 17 , punctuating the distance between the rollers 16a, 16 b. The rotating rollers 16 a, 16 b can be mounted supported by an elastic means 18 (according to Figure 3). Opposed to the lower tool 15 is an upper tool 20 made with a punch 19. By the punch 19 the closing force is applied to produce the finished grooved tube 104, widely circular round, from the outside, for the non-round preform 13.
    [00025] For this purpose, the non-round preform 13 is positioned in such a way by the rotating rollers 16 a, 16 b that the region 12 b located on the right next to the groove or slot 11, less deformed, is in a position of 3 hours, as shown in Figure 3 by the mixed horizontal line.
    [00026] The steps of this first bending-closing step are shown in fig.4A, from left to right with the non-round preform 13 positioned, of the application of the closing force by punch 19 and punch 19 raised afterwards force acting.
    [00027] The second bending-closing step - in the same succession as before - is illustrated in Figure 4 B. To optimize the bending moment, the non-round preform 13, here unchanged in its left half, was such positioned that the least deformed region 12a on the left next to the groove or slot 11, assumes a 9 o'clock position. The closing force F (middle illustration) then applied on that side of the preform 13 takes the non-round preform 13 then into the broad, round, definitive shape of the grooved tube 104 ready with the markedly smaller groove or slit 111 , then obtained (illustration on the right externally). List of references 1 tube molding press 2 edge bending 3 sheet metal 4; 104 grooved tube 5a, b support body 6 lower tool 7 bending device 8 molding tool 9 upper tool (punch) 10a, b counter support 11; 111 groove / slot 12a, b less deformed regions 13 non-round mold 14 closing press 15 lower tool 16a, b rotating rollers 17 supporting body 18 elastic means 19 punching 20 upper tool F closing force
    权利要求:
    Claims (2)
    [0001]
    1. Process for the production of grooved tubes (4; 104) of sheet metal (3), especially thick sheet metal, where a sheet metal is added to a tube molding press (1), in which, resting on a lower tool (6), it is molded by an upper tool (9) that can be lifted and lowered by applying a bending force progressively to the grooved tube (4; 104) with longitudinal edges opposed to a posterior longitudinal seam welding with a slit (11; 111), characterized by the fact that initially a grooved tube is produced with a non-round preform (13), insofar as at least in a bending step acting in relation to the medium predetermined by the longitudinal axis of the upper tool (9) immersing itself in the metal plate (3) progressively molded respectively to the left and right on the inside of the metal plate (3), a smaller deformation is carried out in relation to the other bending steps, endo that the non-round preform (13) is positioned in the manufacturing stage before the application of the closing force (F) by rotating it clockwise or counterclockwise and then, by applying a closing force (F ) acting from outside on the non-round preform (13) in regions (12 a, 12 b) specifically less deformed respectively on both sides of the medium, the finished grooved tube (104) is molded.
    [0002]
    2. Process according to claim 2, characterized by the fact that the least deformed region (12 b) to the right of the medium is rotated to a 3 o'clock position and the least deformed region (12 a) to the left of the medium to a 9 o'clock position.
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    CN111954580A|2018-03-30|2020-11-17|杰富意钢铁株式会社|Method and apparatus for bending end of steel plate, and method and apparatus for manufacturing steel pipe|
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    法律状态:
    2013-11-05| B03A| Publication of an application: publication of a patent application or of a certificate of addition of invention|
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-10-29| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-06-09| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application according art. 36 industrial patent law|
    2021-01-19| B09A| Decision: intention to grant|
    2021-03-16| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 30/05/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102011103734.2|2011-05-31|
    DE102011103734|2011-05-31|
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