• 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:
    In the centrifugal casting of iron pipes, molten metal from a tilt ladle 13 is supplied to an inclined pour trough or channel 14 whose outlet nose 16 is relatively axially movable within a rotating mold 3. To compensate for the reduction in the hydrostatic thrust of the molten metal in the pour channel when the metal supply is terminated near the end of the casting operation, the inclination of the channel 14 is gradually increased to thereby maintain a constant flow rate at the nose 16. Further, to compensate for the reduction of the height of fall due to the tilting of the pour channel and the attendant lowering of the downwardly sloping nose, the point of articulation 22 of the channel 14 within the mold is also raised in synchronism with the increased tilting of the channel.
    公开号:SU1373303A3
    申请号:SU853865855
    申请日:1985-03-15
    公开日:1988-02-07
    发明作者:Этьенн Бернар；Пьеррель Мишель；Франсуа МИШЕЛЬ
    申请人:Понт-А-Муссон С.А. (Фирма)；
    IPC主号:
    专利说明:

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    The invention relates to foundry and can be used in the centrifugal casting of pipes or other tubular metal bodies with a socket.
    The purpose of the invention is to improve the quality of the casting by improving the distribution of the metal on the inner surface of the mold.
    FIG. 1 shows a device for carrying out the method, a partial sectional view of a centrifugal casting apparatus containing a feeding device with liquid iron; Fig, 2 - filling device installation; on fig.Z - section LA in figure 2; figure 4 - section bb in figure 2; on fig.Z - section bb In figure 2; figure 6 - section GG in figure 2; 7 - the device, a general view; on Fig - gating channel of the device in an inclined position; figure 9 - toe gating channel in an inclined position; Fig. 10 shows the throat of the gating channel inside the rotating mold, cross section; in fig. 11 — a filling device with a gasket for adjusting the initial height of the filling neck, a section in FIG. 12 is the same, without a gasket for adjusting the initial height of the filling neck, a section; FIG. 13 shows the support frame of the channel tray, the general view of FIG. 14 - channel tray, obliy view.
    A device for carrying out the proposed method (Figures 1 and 2) is used in the installation 1 for centrifugally casting cast-iron pipes 2 of large diameter with a socket, for example, with a diameter of 700-1200 mm. The installation contains a rotating mold 3 of centrifugal casting placed rotatably inside the casing 4 by means of rollers 5 mounted on the base 6, at least one of the rollers 5 is driven to drive the rotation of the mold 3, and the axis of rotation of each of the rollers 5 parallel to axis xx.
    Liquid cast iron of the mold 3 is supplied with a casting device 7, including a movable carriage 8, moving with the help of wheels 9 along rails 10 parallel to the axis X-X, in order to introduce the assembly 11 (channel and tray) into the mold 3 to its most remote end. flare 12.
    The filling device 7 (Figures 1-6) is a tilting casting bucket 13, partially shown in the form of its drain nose.
    The node 11 consists of a sloping downward channel 14 in the direction of the mold 3, and the channel 14 in the upper part is provided with a discharge chute 15, and in the lower part - a pouring neck 16, with a greater slope (approximately + 10) than the slope of the channel itself, while the channel 14 in its straight part between the drain chute 15 and the casting neck 16 is held by the channel bracket 17 in the form of a chute with a profile adjoining the channel 14 profile. In the upper part, namely the drain chute 15, the channel bracket 17 is provided with the bottom of the fork 18 (Fig.1,2,4 and 8), in which The head includes a piston rod piston rod 19, used to tilt the channel at the end of the cast pipe, the casing of which enters plug 20, which is integral with the tray 21 carrying the bracket 17, and at the bottom of the channel very close to its other end, channel bracket 17 in its upper part it has on both sides two pins 22 (6-9) with an axis YY, orthogonal to axis Х-X, abutting at the bottom of two transverse cuts (or semi-bearings) V-shaped, made next to the bottom end of tray 21. Tray 21 is made in the form of a nearly horizontal beam, hollow 4/5 of its length, for receiving and covering the mating and rounded profile of the bracket 17 of the channel.
    Tray 21 always stands on the carriage 8 (Figures 1-5, 7, 8, 13 and 14), but is not attached to the carriage
    8. Tray 21 indirectly rests on the frame 23 of the carriage 8 in the form of a tilting beam as follows: the tray 21 stands for a support adjustable on the viewport, consisting of two side jacks 24, whose bodies located on each side of the tray 21 are fixedly attached to the tray and placed in its lower part at a distance from its upper
    end of about 1/5 of its total length. Close to the edge of the specified upper end (FIGS. 2 and 3), the tray 21 is provided in its upper part with an upwardly open half-bearing 25,
    in certain cases, raised by means of a sealing gasket 26. The half-bearing 25 rests against the mountain with a fixed adjustment (time to cast) of the intermediate frame 29 on the trolley 8. Taking into account the considerable force
    a horizontal axle 27 with the Z-Z axis, ortho-s, which should be attached to the mahogonal axis XX, fixed perpendicularly to two side flanges 28 located symmetrically on both sides of the tray 21.
    The side flanges 28 are formed at a time with the intermediate frame 29 between the carriage 8 and the tray 21. Each flange 28 forms an angular lever with the frame 29. Due to two horizontal axles 30 with a WW axis, parallel to the t5 of the ZZ axis and orthogonal to the X-X axis, which are made with it at the same time and are located under the axle 27, the intermediate frame 29-, which runs parallel to the node 11 (channel-tray) 20 from the node 11 above the carriage 8, articulate in the upper part by means of the trunnions 30, located on the bend of the corner levers, with two
    Vicu 36 to lift the mass of the node 11 (composite channel-tray), manipulation of the flywheel 36 can be facilitated by using a jack 37, which is installed between the upper part of the frame 23 of the trolley 8 and the lower part of the intermediate frame 29. The jack 37 raises the frame 29 when manipulating the flywheels 36.
    Tray 21 is not rigidly attached to the trolley B, but is mounted on it in the form of a tilting beam, supported on trolley 8 by means of flanges 28 and a height-adjustable frame 29. Above the frame 29, the tray 21 is connected to frame 29 by means of semi-bearing 25 on the trunnion 27 of flanges 28 and rests on frame 29 by means of support jacks 24. Consequently, the tray 21 with bearings (not shown) is made with a beam that can swing
    at the same time with the side and parallel posts 31 of the frame 23 of the carriage 8, and is located in the lower part between the jacks 24 of the tray 21 and the adjustable supports on the carriage 8.
    On the upper side of the intermediate frame 29, which has the shape of a bracket open upwards, are installed (on each side of the tray 21) two spherically concave support plates 32. The plates 32 respectively serve as a support for the piston rods 33 of the house- and crates 24.
    The initial location of the gutter channel 14, or rather the height of the end of the casting neck 16 relative to the inner lower component of the mold 3, is achieved by means of screw jacks 34 with fixed adjustment during casting. Responsibly from the side of each support plate 32 between the lower part of the intermediate plate the frame 29 and the upper part of the frame 23 of the carriage 8. The end of each screw of the jack 34 enters the hole made in the intermediate frame 29, while at the other end there is a cylindrical and smooth head Single abuts a spherical profile part 35 on the upper frame 23, the trolley 8. Managing each jackscrew is provided integrally made with it flywheel 36. The screw jacks 34 comprise a support
    Vicu 36 to lift the mass of the node 11 (composite channel-tray), manipulation of the flywheel 36 can be facilitated by using a jack 37, which is installed between the upper part of the frame 23 of the trolley 8 and the lower part of the intermediate frame 29. The jack 37 raises the frame 29 when manipulating the flywheels 36.
    Tray 21 is not rigidly attached to the trolley B, but is mounted on it in the form of a tilting beam, supported on trolley 8 by means of flanges 28 and a height-adjustable frame 29. Above the frame 29, the tray 21 is connected to frame 29 by means of semi-bearing 25 on the trunnion 27 of flanges 28 and is supported on frame 29 by support jacks 24. Therefore, tray 21 b5
    0
    between the position shown by the continuous lines and the position shown by the intermittent lines (Fig.7 and 8) along the jacks 24, during Q pouring, leaning on the pin 27 by means of half-bearing 25.
    The device works as follows.
    Since the sprue channel 14 and its bracket (Figs. 1, 2, 7, 11, and 12) rest on the tray 21, first coordinate the height h of the end of the casting neck 16 relative to the lower component of the mold 3 using only screw jacks 34 if the chill mold has diameter 700-900 mm (fixed adjustment just before casting).
    In the case when the diameter of the chill mold exceeds 900 mm, the fixed adjustment by screw jacks 34 is preceded by the removal of the thickened gasket 26 and the installation of the gasket 38 between the support plates 32 with spherical depressions and the upper side of the intermediate frame 29 (fixed adjustment before casting).
    Since the casting device 7 with the carriage 8 is farthest from the mold 3 (Figures 1 and 2), the start of the pipe casting cycle is included. In this case, the mold 3 is rotated around its axis XX at the time
    51373
    m, like a carriage 8 moving along rails 10, moves to machine 1 for centrifugal casting. In this case, the sprue channel 14 and its bracket 17, which lies at the bottom of the chute 21, penetrate inside the mold 3 while pouring liquid iron by tilting the bucket 13 forward onto the drain chute 15 of the sprue channel 14 at exactly the right moment in such a way that Cast iron appears on the casting neck 16 of the channel 14 when the channel enters the level of the socket 12 of the mold.
    When the bell is filled with cast iron, the casting device 7 with the cart 8 moves back, continuing to pour the cast iron along the cylindrical body of the mold 3. At the moment when the various neck 16 of the channel 14 approaches the end of the mold 3, the iron supply is stopped simultaneously, tilting back the ladle 13, and begin to tilt channel 14 (Fig. 8).
    While the bracket 17 of the gating channel 14 is connected to the tray 21 by means of its pins 22, the jacks 24, called compensatory, raise, in synchronization with the jack 19, the tray 21 above the intermediate frame 29. During this movement, the tray 21 its other end rests on a hinged pin 27 with the axis ZZ, which is carried by the intermediate frame 29.
    Following this, the axis Y-U of the pivots 22 of tipping the bracket 17 of the gating channel 14 moves upwards, describing a small arc around the axis ZZ (shown by arrows in FIGS. 8 and 9) and thus leads to an automatic correction and lifting the height h of the end of the casting neck. as it approaches the lower component of the mold 3, the change in the inclination of the channel 14 and its cantilever part in the lower part of the spherical, low axis of the V-axle 22.
    Automatic wake up high
    You h, casting neck 16 can be avoided by moving the hinge Y-U bracket 17 gating channel 14 as close as possible to the end of the casting neck. However, in terms of design features, this is not possible due to a change in the slope and the brightly bent slope of the casting neck 16 relative to the channel 14 itself, since



    ..
    0

    this inclined gap is caused by the sum of the superimposed and conjugated thickenings of the bottom, channel 14 (channel bracket 17), tray 21, which are expressed in excessive lifting of channel 14 above the lower component of the mold 3, which should be compensated. This excessive lift already exceeds the allowable height of the cast iron (about 100 mm) inside the molds, and the significant thickness of the chute 21 cannot be reduced due to its rigidity and the length of its cantilever part hanging over the neck 16 at the bottom of its fulcrum materialized mi support plates 32, which also can not be reduced.
    In addition, the pins 22 would not be able to withstand intense thermal radiation if they were placed next to the end of the casting neck 16.
    When channel 14 is completely emptied and, consequently, the pipe is cast, jacks 19 and 24 return to their original position and, therefore, node 11 (channel 14 is channel bracket 17) and tray 21 return to the lower initial position. The device 7 with the trolley 8 continues to move away from the mold 3.
    When the pipe is cast, it solidifies, removing it. Installation
    free for new pouring.
    I
    If conditions are made. require, for example, a very frequent change of the diameters of the molds 3 in order to limit the time of the initial adjustment of the casting device 7, it is relatively easy for the operations of replacing the molds 3 to introduce automation of the adjustment. So, for example, screw jacks 34 with manual control and with gaskets 26 and 38 can be threaded: thread on hydraulic jacks. In the same way, it is possible to extend or reduce the limits of adjustments to the initial height h, of the channel, depending on the use of molds 3 of larger or smaller diameter.
    Depending on the diameter of the molds It is possible to use the shims of the adjustment of the tray 21 in height in its two supporting zones on the intermediate frame 29.
    So, for example, for diameters of 700–900 mm, molds 3 reduce the upper support of the tray 21 on the trunnion 27 by installing a gasket 26 between the tray 21 and the semi-bearing 25 for diameters greater than 900 mm.
    Raise the lower support of the tray 21 on the plates 32, install sealing gaskets 38 between the plates 32 and the intermediate frame 29, and turn on the gasket 26 (Fig. 11). Consequently, thanks to the screw jacks 34, it is possible to adjust the initial height h, the end of the casting neck 16 relative to the level of the lower component of the mold 3, by a few tenths of a degree, without changing the flow direction, the initial inclination of the tray 21 of the bracket 17 and the runner channel 14, which is about 1, and this small angular change A (FIG. 7) is increased. Changing the inclination of the casting channel 14 or the angle A is not necessary due to the significant gain ratio associated with a significant length L of the casting channel 14, measured between the casting neck 16 and the supports, materialized jacks 24 and spherical recesses of the plates 32. The length L may, for example reach 7 m.
    Adjusting the initial height h of the casting neck is required not only before the start of a series of outlets, but also during the replacement of molds of different diameters. The mold 3 is mounted on the Katkov frame of the rollers 5 for its rotation. The height position of these rollers is constant (shown in Fig. 10 by continuous strokes), while
    50
    the axial space 38 separating them between the plates 32 with the spherical one is also at the same level. The mold 3 is mounted on the rollers 5, while the end of the casting neck 16 is in its original position in height h relative to the lower component of the mold 3, If the molds 3 replace the molds For intermittent strokes of a larger diameter than the diameter of the mold 3 This new chill mold is located closer to the filler neck than in the previous case. The new position of the neck 16 relative to the mold
    55
    KIM recess and the upper surface of the intermediate frame 29. Then eliminate the gasket installed between the bearing 25 and the upper part of the tray 21 (Fig. 3), to bring excessive inclination of the channel 14 associated with the previous addition of the gaskets 38, to the optimum position of the outflow, those. a negative inclination of 1 ° in the direction of the centrifugal casting machine, with the final height adjustment h, complemented by the action of screw jacks 34.

    0 5
    0
    is a height position h incompatible with optimal casting conditions. Therefore, it is necessary to raise the filler neck to obtain a height h corresponding to a height h |, i.e. the optimum conditions for the outflow of iron to the automatisation of the channel at the end of the casting.
    In practice, the changes in height h, h, hj of the filler neck, corresponding to a certain change in the diameter of the mold, are relatively small. For example, if you replace a 700 mm diameter shade with a 900 mm diameter mold, the correctable differences in height are about 170 mm for an angular change of A by 1 and screw jacks 34 allow you to make this correction, and the stroke of the screw jacks is extremely limited due to the need for correction inside the diametral plug. i
    This does not occur when using
    On the Katkov frame 5, chill molds with a diameter of 1000-1200 mm correspond to the permissible capacity of machines for centrifugal casting of pipes using the proposed filling devices. Indeed, in order to maintain the height of the casting neck acceptable under these conditions, the inclination of the channel and the angle A are forced to abnormally change by an amount beyond the permitted tolerances and causing the inversion of channel 14 (ascending channel 14 towards the mold 3), and therefore negative on. expiry board. To partially correct this deficiency, as well as to complement the deliberately limited adjustment possibilities of the screw jacks 34, sealing gaskets are installed (Fig. 11).
    five
    five
    0
    38 between the plates 32 with spherical
    KIM recess and the upper surface of the intermediate frame 29. Then eliminate the gasket installed between the bearing 25 and the upper part of the tray 21 (Fig. 3), to bring excessive inclination of the channel 14 associated with the previous addition of the gaskets 38, to the optimum position of the outflow, those. a negative inclination of 1 ° in the direction of the centrifugal casting machine, with the final height adjustment h, complemented by the action of screw jacks 34.
    For molds 3 with a diameter of 700 to 900 mm and molds 3 with a diameter of 900 to 1200 mm, it is provided that the stroke of the screw pistons 34 will be in the average adjustment position for the average diameter of the mold 3, included in each of the two diametrically forks, respectively, 700 to 900 and 900 to 1200 mm, in order to regulate the slope of the channel 1D around the average optimal value, not over the fork tolerances allowed for the slope of the channel 14.
    Therefore, with this arrangement, the tray 21 can have an angular vertical displacement A thanks to the screw jacks 34 (Fig. 7) to achieve a constant initial height h, the casting neck 16 20 above the lower component of the mold 3 of different diameters. In addition, thanks to jacks 24 (upper part of assembly 11) and hinge 22 with axis Y of bracket 17 on tray 21 (lower 25 of assembly 11), it is possible to maintain a constant height h of casting neck 16 synchronously with the inclination of channel 14 by means of a jack 19 at the end of the pipe casting, while without the invention’s principles, the inclination of the channel 14 through the jack 19 at the end of the casting would cause the casting neck 16 to approach the mold 3, taking into account the position of the hinge 22 with the axis Y of the bracket 17 of channel 14 on the tray 21 and its hanging console at the bottom of the hinge 22. Ta In this way, optimal conditions for the outflow of iron during the entire Q duration of the casting can be ensured.
    In addition, thanks to the yctaHOBKe of the intermediate frame 29 with flanges 28 between the tray 21 and the carriage 8, the fixed adjustments of the tray 21 (before casting) can be improved by means of these means.
    权利要求:
    Claims (7)
    [1]
    1. A method of centrifugally casting pipes, including pouring a liquid metal into a rotatable mold and tilting the chute at the end of casting, characterized in that, in order to improve the quality of the casting by improving the distribution of metal on the inner surface of the mold, the distance from rof is 137330310
    The sides of the gutter are kept constant up to the lower generatrix of the surface of the rotated mold.
    [2]
    2. Devices for centrifugal casting of pipes containing a mold, a chute, a carriage for moving the chute along the mold, a tray on which the chute and a support are located equal to the length of the tray, connected to it from the toe of the chute with trunnions tilting with a jack connected to it, characterized in that, in order to improve the quality of the casting by improving the distribution of the metal on the inner surface of the mold, it is provided with an intermediate frame connected to Tei by means of a pair of burners ontalnyh trunnions and height-adjustable support, wherein the tray is mounted on the intermediate frame to swing through a horizontal shaft and dual jacks integral with the tray.
    [3]
    3. A device according to claim 2, characterized in that the intermediate frame is connected to the end of the tray by means of horizontal pins and a shaft, which are interconnected by a pair of flanges which are integral with the intermediate frame, the tray being provided with a bearing supported on the shaft which is located under horizontal pins.
    [4]
    4. A device according to claim 2, characterized in that the twin jacks are provided with rods with shaped ends supported on an intermediate frame by means of spherical concave plates.
    [5]
    5. The device according to claim 2, characterized in that the intermediate frame with flanges is made in the form of L-shaped levers, in the corners of which horizontal pins are placed.
    [6]
    6. The device according to claim 2, characterized in that the height-adjustable support of the intermediate frame is a pair of re; removable jacks with flywheel control.
    [7]
    7. The device according to claim 2, characterized in that it is provided with an additional jack located on the trolley under the intermediate frame.
    35
    50
    55
    FIG.
    P, S
    21
    eleven
    2
    FIG. five
    yyash
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    FIG. one
    15
    xhuhuuuhhhhuh: xxxx x.llllh M l4XXXXX4XXXWS 44 X d
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    FIG. 9
    FIG. ten
    J7
    11
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    eight
    FIG. 12
    FIG. 13
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    同族专利:
    公开号 | 公开日
    GB8506644D0|1985-04-17|
    FR2561146B1|1986-08-29|
    BR8501174A|1985-11-12|
    GB2155829B|1987-05-28|
    FR2561146A1|1985-09-20|
    US4632172A|1986-12-30|
    JPH0453611B2|1992-08-27|
    GB2155829A|1985-10-02|
    JPS60213349A|1985-10-25|
    DE3509235C1|1985-12-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1745424A|1925-08-27|1930-02-04|John E Hubbell|Method for casting pipes|
    FR646882A|1926-01-09|1928-11-16|Metallurg D Aubrives Et Viller|Device allowing the manufacture by centrifugal force of cylindrical hollow bodies whose diameter is small compared to the length, or of any diameter, but of great length|
    DE704037C|1939-08-20|1941-03-21|Eisenwerke Akt Ges Deutsche|Method and device for the simultaneous casting of several hollow bodies in a centrifugal casting machine|
    JPS559270B2|1977-06-03|1980-03-08|
    FR2459698B1|1979-06-25|1983-04-15|Pont A Mousson|AT392228B|1988-11-28|1991-02-25|Brugger Gottfried|METHOD AND DEVICE FOR SPIN CASTING COPPER OR ITS ALLOYS, IN PARTICULAR BRONZE|
    DE4019368A1|1990-06-18|1991-12-19|Hoechst Ag|METHOD FOR THE PRODUCTION OF TUBULAR SHAPED PARTS FROM HIGH-TEMPERATURE-SUPRALEITER-MATERIAL AND A PLANT FOR ITS IMPLEMENTATION|
    GB2299534B|1994-02-18|1998-04-22|New Pro Foundries Limited|Metal composite casting method|
    GB2286786A|1994-02-18|1995-08-30|New Pro Foundries Limited|Metal composite casting|
    US20080096039A1|2006-10-19|2008-04-24|Gm Global Technology Operations, Inc.|Method of making precursor hollow castings for tube manufacture|
    CN101879588B|2010-07-29|2012-01-25|新兴铸管股份有限公司|Separated pouring truck of centrifugal machine|
    FR3031922A1|2015-01-23|2016-07-29|Kubota Kk|FUSION METAL SUPPLY STRUCTURE AND CASTING MACHINE|
    CN106862518A|2017-04-28|2017-06-20|新兴铸管股份有限公司|A kind of hot-die centrifuge pours into a mould vehicle control|
    CN110586912A|2019-10-25|2019-12-20|哈尔滨博实自动化股份有限公司|Self-adaptive casting trough mechanism for ferroalloy casting operation|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8404249A|FR2561146B1|1984-03-16|1984-03-16|CENTRIFUGAL CASTING PROCESS AND DEVICE|
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