WO2018090989A1 - Dispositif et procédé de formage sous pression - Google Patents

Dispositif et procédé de formage sous pression Download PDF

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Publication number
WO2018090989A1
WO2018090989A1 PCT/CN2017/111837 CN2017111837W WO2018090989A1 WO 2018090989 A1 WO2018090989 A1 WO 2018090989A1 CN 2017111837 W CN2017111837 W CN 2017111837W WO 2018090989 A1 WO2018090989 A1 WO 2018090989A1
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WO
WIPO (PCT)
Prior art keywords
mold
lower mold
pressure forming
movable
sub
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PCT/CN2017/111837
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English (en)
Chinese (zh)
Inventor
王利民
Original Assignee
内蒙古万鼎科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN201621252855.4U external-priority patent/CN206169144U/zh
Priority claimed from CN201611022750.4A external-priority patent/CN108067574B/zh
Application filed by 内蒙古万鼎科技有限公司 filed Critical 内蒙古万鼎科技有限公司
Publication of WO2018090989A1 publication Critical patent/WO2018090989A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J13/00—Controls for manipulators
    • B25J13/02—Hand grip control means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J5/00—Manipulators mounted on wheels or on carriages
    • B25J5/02—Manipulators mounted on wheels or on carriages travelling along a guideway

Definitions

  • the present disclosure relates to the field of metal workpiece processing technology, for example, to a pressure forming apparatus and a pressure forming method based on the pressure forming apparatus.
  • Die forging is a forging method in which a metal blank is plastically deformed in a mold under an external force and filled into a cavity to obtain a forged piece of a desired shape and size.
  • the billet In the die forging process, the billet overall undergoes significant plastic deformation, and a large amount of plastic flow; the flowing billet fills the cavity, and after filling, maintains the pressure to form the desired shape.
  • die forging is also known as hot die forging.
  • die forging can forge forgings with more complex shapes and relatively accurate dimensions, and the production efficiency is relatively high. It can mass produce forgings with the same shape and size, which is convenient for the subsequent cutting process using automatic machine tools and automatic production line.
  • the forged piece after forging has a directional fibrous structure, that is, a streamline.
  • the reasonable die forging process and the mold are selected to make the distribution of the streamline consistent with the shape of the part, which can significantly improve the mechanical properties of the forging.
  • the die forging die includes an upper die 1 and a lower die 2 which are oppositely disposed and relatively movable, and a cavity 3 is formed between the upper die 1 and the lower die 2; as shown by b in FIG.
  • the billet 5 is placed in the cavity 3, and the pressure P acts on the upper mold to act on the billet 5; as shown by c in Fig. 1, under the action of the pressure P, the billet 5 is deformed and flows, and gradually fills the cavity 3.
  • the blank 5 is sufficiently flow-deformed to achieve the function of dense tissue.
  • the billet 5 After the billet 5 is deformed by pressure, it fills the space of the nearest cavity 3, and then the pressure is increased, pushing the billet 5 to fill further, the whole filling process is from near to far, if the shape of the workpiece is relatively complicated, it has a larger The length of the part, then because the flow path of the blank 5 is too long, often resulting in poor molding, uneven texture of the workpiece, especially when forging a thin wall structure with a large length, the difficulty will be greatly increased;
  • the wall thickness of the workpiece is often deliberately increased during the design of the mold, which brings about a negative effect of increasing the amount of machining in the later stage, and the process is complicated and economically unreasonable;
  • the pressure can be gradually increased to the preset maximum molding pressure, and then the pressure is maintained. At this time, due to the influence of the frictional resistance, the pressure applied to the lower portion of the blank 5 is inevitably smaller than the upper portion of the blank 5 The pressure received causes the force of the entire workpiece to be unbalanced;
  • the blank material flow should fill the cavity 3, at least the frictional resistance of the inner and outer surfaces, the frictional resistance required for molding is large, the molding pressure is high, and the mold is easy to wear and has a short service life;
  • Mold lubrication requirements are high. Due to the difference in lubrication of the mold surface, the resistance of the flow channel is uneven. It is easy to lubricate the position with low resistance. It is easy to form the flow prematurely. The position with high lubrication resistance is likely to form the flow too late. The entire forming end face is prone to material folding and flow disorder, which affects product quality.
  • the present disclosure proposes a pressure forming device that can solve the problem of molding difficulty and unevenness of the shape of the formed workpiece caused by the too long flow path of the blank.
  • the present disclosure also proposes a pressure forming method with high machining precision and small cutting allowance for a workpiece having a large length.
  • a pressure forming device comprising: an upper die, a lower die and a movable die
  • the upper mold and the lower mold are oppositely disposed and relatively movable;
  • the movable mold is disposed at at least one of: being inserted into the lower mold and sleeved outside the upper mold and the lower mold;
  • the movable mold is movable up and down with respect to the upper mold and the lower mold;
  • the upper mold, the lower mold and the movable mold together form a cavity, and the movable mold can be dynamically increased relative to the upper mold and the lower mold during molding of the blank to be processed.
  • the volume of the mold cavity is the volume of the mold cavity.
  • the movable mold is sleeved outside the upper mold and the lower mold, and a projected area of an upper surface of the lower mold is not equal to a projected area of a lower surface of the upper mold.
  • the moving mold comprises at least two sub-moving molds arranged to move in a radial direction of the sub-moving mold under the driving of the power unit.
  • the lower die includes at least two sub-dies that are radially movable under the drive of the power unit to cause the lower die to expand or contract in its own radial direction.
  • all of the sub-die forms a solid cylinder or a hollow cylinder during the pressure forming process, and after the pressure forming is finished, the motor is driven to move radially outward to drive the lower mold to expand. The inner side is moved radially inward to contract the lower mold.
  • the lower die includes at least two sub-dies that are fan-shaped and at least two sub-dies that are in the shape of a dove, the sub-die of the fan shape and the sub-die of the dome shape are arranged in a cross All of the sub-dies are arranged to form a hollow cylinder during the pressure forming process, and the sub-die and the fan-shaped sub-die are sequentially formed along the power device after the pressure forming is completed. The inner side is moved radially inward to contract the lower mold.
  • the gap width between the sidewall of the movable mold and the sidewall of the lower mold satisfies at least one of: unequal along the circumferential direction of the lower mold 2, and an axis along the lower mold 2 Not waiting.
  • the movable mold is moved by a power device at a predetermined speed in a direction to increase the volume of the cavity to deform the blank and fill the cavity space formed by the movement of the movable mold until the movable mode moves.
  • a power device at a predetermined speed in a direction to increase the volume of the cavity to deform the blank and fill the cavity space formed by the movement of the movable mold until the movable mode moves.
  • the pressure applied to the upper mold and the lower mold is removed to open the pressure forming device and take out the workpiece.
  • the pressure is applied to at least one of the upper mold 1 and the lower mold 2, and pressure is transmitted to the blank, and the pressure applied to the upper mold and/or the lower mold is pre- a maximum forming pressure P, at which pressure is applied to at least one of the upper mold 1 and the lower mold 2, pressure is transmitted to the blank, until the movable mold 4 is moved to a dead center, and the cavity 3 is formed.
  • the pressure value is always maintained during the forming process of the workpiece.
  • the movable mold is sleeved outside the upper mold and the lower mold, and the method for opening the pressure forming device during the taking out of the workpiece comprises:
  • the sub-die is moved radially inward to contract the lower mold to separate the lower mold from the workpiece.
  • the movable mold 4 is sleeved outside the upper mold 1 and the lower mold 2, and the opening pressure forming device comprises:
  • the sub-die 21 is moved radially inward to contract the lower mold 2, and the lower mold 2 is separated from the workpiece.
  • the moving the sub-die 21 radially inwardly shrinks the lower mold 2 The lower die 2 is separated from the workpiece and further includes:
  • the volume of the mold cavity is dynamically increased, and the billet will quickly fill the enlarged space in time to start filling from the nearest point, thus ensuring the filling.
  • the billet only takes the shortest process, the billet process is balanced, the streamline is even and stable, and the workpiece quality is uniform;
  • the movement speed of the outer mold can be controlled to accurately control the increase speed of the cavity volume, thereby achieving a perfect balance between the deformation amount of the blank and the volume increase of the cavity, and avoiding the deformation of the blank in the conventional pressure forming device. And the problem of difficulty in controlling the flow rate;
  • the pressure can be kept at the maximum during the whole molding process and the movement of the movable mold can be stopped at any time to maintain the pressure on the workpiece.
  • the strength of the billet structure is balanced and stable, and the quality of the formed workpiece is better, which avoids the traditional die forging process can only be completed at the end of the die forging.
  • the frictional resistance of the flow is from a friction surface of the upper or lower mold, the frictional resistance required to be formed is low, the molding pressure is low, the average life of the apparatus is long, and the cost is low;
  • the pressure forming method based on the above-described pressure forming apparatus provided by the present disclosure has high processing precision and a small cutting allowance for a workpiece having a large length and a thin wall thickness.
  • FIG. 1 is a schematic structural view of a pressure forming process of a pressure forming device in the related art
  • FIG. 2 is a schematic structural view of a pressure forming process of a pressure forming device of a first structure according to an embodiment
  • FIG. 3 is a schematic structural view of a pressure forming apparatus of a second structure according to an embodiment
  • FIG. 4 is a schematic structural view of a lower mold in a contracted state according to an embodiment
  • FIG. 5 is a schematic structural view of a lower mold in an open state according to an embodiment
  • FIG. 6 is a schematic structural view of a lower mold in a contracted state according to another embodiment
  • FIG. 7 is a schematic structural view of a lower mold in an open state according to another embodiment.
  • the pressure forming device provided in this embodiment comprises: an upper die 1, a lower die 2 and a movable die 4.
  • the upper die 1 and the lower die 2 are oppositely disposed and relatively movable, and the movable die 4 is sleeved outside the upper die 1 and the lower die 2.
  • the upper mold 1 and the lower mold 2 can move up and down, the upper mold 1, the lower mold 2 and the movable mold 4 together form a cavity 3.
  • the movable mold 4 moves relative to the upper mold 1 and the lower mold 2, and the movable mold
  • the gap between the inner wall of 4 and the outer wall of the upper die 1 or the lower die 2 is increased to dynamically increase the volume of the cavity 3;
  • the pressure forming device further includes a pressure assembly that provides pressure to the pressure forming device.
  • the pressure component can be a hydraulic cylinder.
  • the pressure forming device provided in this embodiment comprises: a movable mold 4 which can move up and down with respect to the upper mold 1 and the lower mold 2.
  • the volume of the cavity 3 is dynamically increased, and the blank 5 is quickly and continuously filled.
  • the large cavity space starts to fill from the nearest point, which ensures that the blank 5 is the shortest process, the billet 5 is balanced, the streamline is even and stable, and the workpiece texture is uniform, and because the billet 5 process is short.
  • the movement speed of the outer mold can be controlled to accurately control the increase speed of the cavity 3 volume, thereby achieving a perfect balance between the deformation amount of the blank 5 and the volume increase of the cavity 3, avoiding the tradition.
  • the deformation amount and the flow velocity of the blank 5 after the force is hard to control; in addition, the pressure can be kept the maximum during the entire molding process and the movement of the movable mold 4 can be stopped at any time to protect the workpiece.
  • the material structure of the billet is balanced and stable, and the quality of the formed workpiece is better, which avoids the problem that the conventional die forging can only maintain the pressure and the unevenness of the workpiece at the end of the die forging; furthermore, because the movable mold 4 can Moving, so the frictional resistance of the flow is from a friction surface of the upper die 1 or the lower die 2, the frictional resistance required for molding is low, the molding pressure is low, the average life of the device is long, and the cost is low; The flow of the stroke occurs, so the difference in resistance does not cause a change in the quality of the molding, so It can guarantee the stability of product quality and low lubrication requirements.
  • the projected area of the upper surface of the lower mold 2 is not equal to the projected area of the lower surface of the upper mold 1, so that the blank 5 flows during the molding process.
  • the movable mold 4 includes at least two sub-moving molds that are radially movable under the driving of the power unit to facilitate opening of the sub-moving mold by radially outwardly after the molding process ends.
  • Mode 4 The number of sub-moving molds is not particularly limited, and can be specifically set according to the size of the pressure forming device and the workpiece.
  • the power unit for driving the movable mold to move up and down with respect to the upper mold 1 and the lower mold 2 and to drive the movable mold to move in the radial direction may be a hydraulic cylinder.
  • the lower mold 2 includes at least two sub-down molds that are radially movable under the driving of the power unit to cause the lower mold 2 to expand and contract in the radial direction.
  • the power unit for driving the lower mold can be a hydraulic cylinder.
  • the gap width between the sidewall of the movable mold 4 and the sidewall of the lower mold 2 is not equal along the circumferential direction of the lower mold 2; or is unequal in the axial parallel direction of the lower mold 2;
  • the gap width between the side wall of 4 and the side wall of the lower mold 2 is unequal in the circumferential direction and is not equal in the axial direction.
  • the upper mold 1, the lower mold 2 and the movable mold 4 together form a cavity 3, and the cavity 3 has an irregular shape, and the gap width between the upper portion and the lower mold 2 of the movable mold 4 portion on the left side in the figure is shown.
  • D1 is smaller than the gap width d2 between the upper portion of the movable mold 4 portion on the right side in the drawing and the lower mold 2, and the gap width d2 between the upper portion and the lower mold 2 of the movable mold 4 portion on the right side in the drawing is smaller than the lower portion and the lower portion thereof.
  • the billet 5 is deformed downward to fill the cavity 3, d2 is larger than d1, and the forming resistance is low, the billet 5 is preferentially filled with a space having a gap width of d2, and the billet 5 passes through the gap width.
  • the cavity 3 is dynamically increased, and the blank 5 is gradually filled into the cavity 3 from the lower portion, so the lower gap width is obtained.
  • the d3 position has a large cross section and a large space, but it is also filled first.
  • the movable mold 4 is controlled to gradually decrease, and the blank 5 gradually fills the vacant space, so although the dimensions of d1 and d2 are different. Large, segregation of the flow does not occur, the position of the two will be filled simultaneously with the flow, so that the formation of workpieces with unequal wall thickness and axial unequal wall thickness in the circumferential direction can be well realized.
  • the embodiment further provides a pressure forming method based on the above pressure forming device, comprising:
  • the blank 5 to be processed is placed in a cavity 3 surrounded by the upper mold 1, the lower mold 2 and the movable mold 4;
  • the movable mold 4 is moved at a predetermined speed under the driving of the power unit to increase the volume of the cavity 3, and the billet 5 is rapidly deformed and filled with the cavity space formed by the movement of the movable mold 4 until the movable mold 4 moves to the end.
  • the pressure applied to at least one of the upper mold 1 and the lower mold 2 is removed, the pressure forming device is opened, and the workpiece is taken out.
  • the pressure forming method based on the above-described pressure forming apparatus provided by the present embodiment has high processing precision for a workpiece having a large length and a small wall thickness, uniform workpiece texture, and small cutting allowance.
  • the embodiment provides a pressure forming device, the structure of which is different from the pressure forming device provided by the above embodiment in that, as shown in FIGS. 4 and 5, all of the sub-die 21 are formed into a solid cylinder or hollow during the pressure forming process.
  • the cylinder after the end of the pressure forming, is first moved radially outwardly under the driving of the power unit to expand the lower mold and then move radially inward to contract the lower mold.
  • the power unit for driving the lower mold 21 in the radial direction may be a hydraulic cylinder disposed in a direction parallel to the axis of the pressure forming device and connected to the output shaft of the hydraulic cylinder to convert the linear reciprocating motion of the hydraulic cylinder output into the radial direction. Movement mechanism.
  • the embodiment further provides a pressure forming method based on the above pressure forming device, which is different from the pressure forming method provided in the first embodiment described above in that:
  • the method of opening the pressure forming device during the taking out of the workpiece includes:
  • the sub-die 21 is moved radially outward to cause the lower mold 2 to expand the workpiece in a radial direction, and then the sub-die 21 is moved radially inward to contract the lower mold to separate the lower mold 2 from the workpiece.
  • the step of raising the step of returning to the upper mold 1 and moving the sub-moving mold radially outward to open the movable mold 4 is not limited, that is, the step of returning to the upper mold 1 may be performed first, and then the radial movement of the sub-moving mold may be performed.
  • the step of moving the movable mold 4 to the outer side is also performed, and the step of moving the movable mold radially outward to open the movable mold 4 can be advanced, and the step of raising and returning to the upper mold 1 is performed.
  • the embodiment provides a pressure forming device, the structure of which is different from the pressure forming device provided by the above embodiment in that, as shown in FIG. 6 and FIG. 7, the lower die includes at least two sub-dies 21 which are fan-shaped and There are two sub-shaped lower molds 21, the fan-shaped sub-lower mold 21 and the sub-shaped sub-low mold 21 are alternately arranged, and all the sub-low molds 21 form a hollow cylinder during the pressure forming process, at the end of the pressure forming.
  • the sub-die 21 and the fan-shaped sub-die 21, which are driven by the power unit, are sequentially moved radially inwardly to contract the lower mold.
  • the embodiment further provides a pressure forming method based on the above pressure forming device, which is different from the pressure forming method provided by the above embodiment in that:
  • the method of opening the pressure forming device during the removal of the workpiece includes:
  • the lower mold 21 is moved radially inward to contract the lower mold 2, and the lower mold 2 is separated from the workpiece.
  • the sub-lower mold 21 in the shape of a dome and the sub-low mold 21 in the fan shape are sequentially radially. Moving inward to contract the lower die 2;
  • the order of raising the returning upper mold 1 and moving the sub-moving mold radially outward to open the movable mold 4 is not limited.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the embodiment provides a pressure forming device, which has the same structure as the pressure forming device provided by the above embodiment, and includes an upper die, a lower die and a movable die.
  • the upper die and the lower die are oppositely arranged and relatively movable, and the movable die is inserted.
  • the lower mold the upper mold, the lower mold and the movable mold together form a cavity.
  • the movable mold moves relative to the upper mold and the lower mold, and the gap between the outer wall of the movable mold and the inner wall of the lower mold increases.
  • the volume of the cavity is increased;
  • the pressure forming device further includes a pressure assembly that provides pressure to the pressure forming device.
  • the pressure component can be a hydraulic cylinder.
  • a set of movable molds disposed on the outer side of the upper mold and the lower mold and movable relative to the upper mold and the lower mold may be simultaneously provided.
  • the volume of the cavity of the pressure forming device can be dynamically increased, so that the billet flow is shorter, the billet flow is more balanced, the streamline is more uniform and the workpiece texture is more uniform.

Abstract

L'invention concerne un dispositif de formage sous pression et un procédé de formage sous pression correspondant. Le dispositif de formage sous pression comprend un moule supérieur (1), un moule inférieur (2) et un moule mobile (4), le moule supérieur (1) et le moule inférieur (2) étant disposés à l'opposé l'un de l'autre et pouvant se déplacer l'un par rapport à l'autre, et le moule mobile (4) est disposé dans au moins un des cas suivants : le moule mobile est inséré dans le moule inférieur (2) et est gainé à l'extérieur du moule supérieur (1) et du moule inférieur (2), et le moule mobile (4) peut se déplacer vers le haut et vers le bas par rapport au moule supérieur (1) et au moule inférieur (2); le moule supérieur (1), le moule inférieur (2) et le moule mobile (4) entourent conjointement une cavité de moule (3); et pendant le processus de formage d'une ébauche à traiter, le moule mobile (4) peut se déplacer vers le haut et vers le bas par rapport au moule supérieur (1) et au moule inférieur (2) de manière à augmenter dynamiquement le volume de la cavité de moule (3). Le dispositif de formage sous pression et le procédé de formage sous pression correspondant présentent une haute précision d'usinage et une faible surépaisseur d'usinage par coupe pour des pièces ayant une longueur relativement grande et une épaisseur de paroi relativement mince.
PCT/CN2017/111837 2016-11-18 2017-11-20 Dispositif et procédé de formage sous pression WO2018090989A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201621252855.4 2016-11-18
CN201621252855.4U CN206169144U (zh) 2016-11-18 2016-11-18 一种压力成型装置
CN201611022750.4A CN108067574B (zh) 2016-11-18 2016-11-18 一种压力成型装置及压力成型方法
CN201611022750.4 2016-11-18

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WO2018090989A1 true WO2018090989A1 (fr) 2018-05-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113354419A (zh) * 2021-07-02 2021-09-07 广东工业大学 一种晶粒[00l]高度定向的氮化硅基陶瓷及其制备方法和应用

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US4824617A (en) * 1986-07-30 1989-04-25 Inoue Mtp Kabushiki Kaisha Method for manufacturing plastic foam
CN1487877A (zh) * 2001-01-26 2004-04-07 用于注射－压缩模塑工艺的模具和方法
CN101065233A (zh) * 2004-09-20 2007-10-31 Ecim科技公司 制造塑料产品的装置和方法
CN101827695A (zh) * 2007-08-16 2010-09-08 迪亚布国际股份公司 挤压系统
CN102773976A (zh) * 2012-07-10 2012-11-14 华南理工大学 一种双向压缩模具及其实现方法与应用
WO2016088051A1 (fr) * 2014-12-01 2016-06-09 Sabic Global Technologies B.V. Moule-bloc
CN205436987U (zh) * 2016-03-22 2016-08-10 苏州银涛精密锻造有限公司 一种越野车减震器零件的精密锻造模具
CN206169144U (zh) * 2016-11-18 2017-05-17 内蒙古万鼎科技有限公司 一种压力成型装置

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Publication number Priority date Publication date Assignee Title
US4824617A (en) * 1986-07-30 1989-04-25 Inoue Mtp Kabushiki Kaisha Method for manufacturing plastic foam
CN1487877A (zh) * 2001-01-26 2004-04-07 用于注射－压缩模塑工艺的模具和方法
CN101065233A (zh) * 2004-09-20 2007-10-31 Ecim科技公司 制造塑料产品的装置和方法
CN101827695A (zh) * 2007-08-16 2010-09-08 迪亚布国际股份公司 挤压系统
CN102773976A (zh) * 2012-07-10 2012-11-14 华南理工大学 一种双向压缩模具及其实现方法与应用
WO2016088051A1 (fr) * 2014-12-01 2016-06-09 Sabic Global Technologies B.V. Moule-bloc
CN205436987U (zh) * 2016-03-22 2016-08-10 苏州银涛精密锻造有限公司 一种越野车减震器零件的精密锻造模具
CN206169144U (zh) * 2016-11-18 2017-05-17 内蒙古万鼎科技有限公司 一种压力成型装置

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Publication number Priority date Publication date Assignee Title
CN113354419A (zh) * 2021-07-02 2021-09-07 广东工业大学 一种晶粒[00l]高度定向的氮化硅基陶瓷及其制备方法和应用

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