WO2019022634A1 - Procédé de formation d'une ébauche en feuille et dispositif de mise en œuvre - Google Patents

Procédé de formation d'une ébauche en feuille et dispositif de mise en œuvre Download PDF

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Publication number
WO2019022634A1
WO2019022634A1 PCT/RU2017/000632 RU2017000632W WO2019022634A1 WO 2019022634 A1 WO2019022634 A1 WO 2019022634A1 RU 2017000632 W RU2017000632 W RU 2017000632W WO 2019022634 A1 WO2019022634 A1 WO 2019022634A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
rod
housing
clamping device
ring
Prior art date
Application number
PCT/RU2017/000632
Other languages
English (en)
Russian (ru)
Inventor
Ринат Музахитович ГИЛЬФАНОВ
Сергей Николаевич КНЯЗЕВ
Петр Валентинович ТРУСОВ
Антон Юрьевич ЯНЦ
Original Assignee
Общество С Ограниченной Ответственностью "Самер" (Ооо "Самер")
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.)
Filing date
Publication date
Application filed by Общество С Ограниченной Ответственностью "Самер" (Ооо "Самер") filed Critical Общество С Ограниченной Ответственностью "Самер" (Ооо "Самер")
Priority to EP17894656.2A priority Critical patent/EP3453468A4/fr
Priority to CN201780013464.8A priority patent/CN109641256A/zh
Priority to KR1020187026400A priority patent/KR20200034916A/ko
Publication of WO2019022634A1 publication Critical patent/WO2019022634A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor
    • B21D24/08—Pneumatically or hydraulically loaded blank holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
    • B21D24/14—Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically

Definitions

  • the invention relates to mechanical engineering, in particular to the processing of metals by pressure, and can be used in stamping dies for controlling local efforts according to a given algorithm.
  • a known method of stamping a box from a sheet blank on a single-action press (RF patent for invention N ° 2527820, publ. September 10, 2014, bul. JN ° 25), which includes placing the blank in an extrusion die, pressing the blank flange by pressing the pressing surface matrices and the hood of the box by drawing in the flange of the workpiece into the gap between the punch and the die to form the wall of the box using a punch and die, the contours of which in the plan correspond to the contour of the wall of the box in plan with regard to the thickness of this wall after stretching and in the bottom of the box one or more holes, characterized in that pre-made sheet blank with punched holes located in places corresponding to dangerous sections in the process of drawing and located opposite the corner curves of the minimum radius of curvature of the box wall in the plan.
  • the disadvantage of this method is the low quality of the parts, as in the box-like parts are technological holes.
  • stamps for the implementation of each operation of this method of drawing contain the following main working parts: punch, die and clamp.
  • the punch is fixed on the fixed lower plate of the stamp, and the matrix on the movable upper plate.
  • Inside the die is an ejector of a stamped semi-finished product, acting from pusher using a stamp device or press.
  • the clamp through the pushers rests on the press pad or the stamp buffer, which provides the necessary force to press the flange of the sheet blank and push the inclined wall of the previous semi-finished product into the die matrix to extract the next semi-finished product.
  • the disadvantage of the described method is limited technological capabilities associated with the need to use at each technological transition of new technological equipment, which also needs to be replaced when changing manufactured parts.
  • a prior art device for controlling the load of a pillow and a pressing machine comprising a device for controlling the load of a pillow (RF patent for invention ⁇ »2401742, publ. 04/10/2010, bull. N ° 10), containing a pillow located under the press slider.
  • the control device contains a hydraulic cylinder that forms a die cushion, a hydraulic control valve connected to it, a hydraulic source, an opening degree control unit, a die cushion lowering speed determination unit, a signal correction unit.
  • the objective of the proposed technical solution is to increase the technological capabilities of the sheet punching process and the accuracy of the parts produced, as well as the possibility of its use on universal equipment.
  • a differentiated clamping device is installed in the die, which during the shaping of the workpiece ensures control of the flow and movement of the metal from the periphery to the zone of the deformation zone by controlling local forces.
  • Differentiated clamping device characterized in that the clamp is made of sectors fixed on the plate, and each sector of the clamp is equipped with a hydraulic device for transmitting forces according to a given algorithm.
  • the differentiated clamping device includes a hydraulic device for transmitting forces according to a given algorithm, includes a housing, a piston rod, rings with an internal surface of variable cross section, which with a peripheral surface of the piston form a gap that changes as the piston moves relative to the housing.
  • the differential clamping device may contain a hydraulic device for transmitting force according to a given algorithm, which consists of a housing, a rod with a piston, a rod is made hollow with radial holes, and a movable ring is installed on the piston, which has the ability to block the holes in the piston; an axial section of variable cross section is installed in the housing, one end of which is made in the form of a piston located in the cavity of the rod; , changing when moving a hollow rod with a piston and a ring relative to the axis.
  • a hydraulic device for transmitting force according to a given algorithm which consists of a housing, a rod with a piston, a rod is made hollow with radial holes, and a movable ring is installed on the piston, which has the ability to block the holes in the piston; an axial section of variable cross section is installed in the housing, one end of which is made in the form of a piston located in the cavity of the rod; , changing when moving a hollow rod with a piston
  • FIG. 1 shows the stamp sheet stamping with a differentiated clamping device
  • figure 2 stamp sheet punching with a differentiated clamping device, section AA
  • FIG. 3 shows a hydraulic device for transmitting force according to a predetermined algorithm in the first embodiment
  • figure 4 - hydraulic device for the transmission of forces for a given algorithm according to the second variant
  • figure 5 - stamp sheet stamping with a differentiated clamping device at the beginning of the process of forming
  • figure 6 - hydraulic device for the transmission of forces according to a given algorithm in the first embodiment at the beginning of the shaping process
  • figure 7 hydraulic device for the transmission of forces according to a given algorithm according to the second variant at the beginning of the shaping process
  • figure 9 for the transmission of forces for a given algorithm according to the first embodiment in the process of shaping
  • figure 10 hydraulic device for transmitting force according to a given algorithm according to the second variant in
  • a differential clamping device 5 consisting of several hydraulic devices 6 transmission of power according to a given algorithm and clamp 7.
  • Hydraulic device 6 transmission of force according to a given algorithm includes a housing 8, a rod 9, one end of which is fixed to the ver It plate 1 and the other is designed as a piston 10.
  • rings 11 which have a variable inner surface section 12. Between the peripheral surface of the piston 10 and the inner surface 12 of variable section rings 11 has a gap ⁇ .
  • a cover 13 is installed on the end surface of the housing.
  • a spring ring 14 is placed, limiting the stroke of the air piston 15 with sealing rings 16 installed between the housing 8 and the rod 9.
  • a spring 17 is installed between the air piston 15 and the cover 13 transferring the load according to a given algorithm, which contains a hollow rod 18 with radial holes 19, which can move along an axis of variable section 20, one end of which is made in the form of a piston 21 with seals 22, and the second through a threaded connection 23 is fixed in the housing 8.
  • the rod 18 has a piston 24 with holes 25 around its perimeter and sealed with rings 26. At one end of the piston 24 there is a ring 27.
  • the ring 27 together with the holes 25 and spring ring 28 installed in the piston 24, forms a check valve.
  • the clamp 7 consists of separate sectors 29 rigidly mounted on a common steel plate 30 to which the housings 8 of the hydraulic devices 6 for transmitting power are attached according to a predetermined algorithm. When this case 8 are located opposite the respective sectors 29.
  • Standard sheet metal punching technology involves the use of gas or mechanical springs, with local efforts being transferred to a rigid clamp.
  • the magnitude of the clamping force is chosen from the calculation, ensuring the flow of metal in the places of dislocation of maximum internal stresses at the initial moment of shaping and extends to the entire surface of the contact of the clamp with the part.
  • the force increases and does not depend on the value required for the optimal shaping process. In this case, such defects as excessive thinning up to rupture, or thickening up to wrinkling may occur.
  • the differential pressure device 5 clamps the workpiece with the calculated forces provided by the force transfer devices 6 according to a predetermined algorithm.
  • the magnitude of the force on each of the sectors 29 is different and corresponds to the optimal value for the shaping process at a given time and in the given pressure zone 7.
  • the change in the force for each force transfer device 6 according to a given algorithm is determined by the size of the gaps ⁇ or ⁇ .
  • the punch comes to the surface of the workpiece and begins to deform it.
  • changes in local efforts are required in the clamping sectors 29. Further deformation of the workpiece also leads to a redistribution of local efforts in the clamping sectors 29, which continues until the completion of the shaping process and is ensured by the control carried out by the device 6.
  • the operation of the hydraulic device 6 of the transmission of forces according to a given algorithm according to the first embodiment is as follows.
  • the rod 9 and the piston 10 are in the upper position, while the pressure in the cavity under the piston is equal to the atmospheric pressure.
  • the pressure in this case is determined by the speed of movement of the rod 9 and the size of the gap ⁇ between the inner surface of a variable section 12 of the rings 11 and the peripheral surface of the piston 10.
  • the speed of movement of the rod 9 depends on the speed of movement of the press ram and can change to zero.
  • the rings 1 1 installed inside the housing 8 are made with internal surfaces of variable cross-section 12.
  • the size of the gap ⁇ between them changes.
  • Changing the gap ⁇ allows you to adjust the flow rate of the working fluid from the cavity under the piston 10 into the cavity above the piston and, accordingly, controls the pressure in the cavity under the piston 10, which is transmitted through the housing 8 to the pressure sections 29.
  • the shape of the inner surfaces of the rings 1 1 is determined by calculation from the condition for ensuring an optimal shaping process for this pressing sector, and specifies, together with the peripheral surface of the piston 10, an algorithm for controlling the transmission of force from the press slide through the upper plate It is specific to the clamping sector 29.
  • the number of rings 11 depends on the complexity of the control algorithm.
  • the working fluid in the cavity above the piston moves the air piston 15, compressing the spring 17.
  • the speed of movement of the rod 18 depends on the speed of movement of the slide and the press can be changed to zero.
  • the axis 20, having a variable cross-section, is fastened to the bottom of the housing 8 by means of the thread 23.
  • the gap size ⁇ changes. Changing the gap ⁇ allows you to adjust the flow rate of the working fluid from the cavity under the piston 24 into the cavity above the piston and, accordingly, controls the pressure in the cavity under the piston 24, which through the housing 8 is transferred to the pressing section 29.
  • the shape of the surface of the axis 20 is determined by calculation from ensuring an optimal shaping process for this sector of the pressing 29 and, together with the opening of the ring 27, sets the algorithm for controlling the transfer of force from the press ram through the upper plate 1 to the specific production sector Izyma 29.
  • Sealing rings 26, placed on the piston 24, prevent the penetration of the working fluid in the cavity above the piston, bypassing the gap ⁇ .
  • the working fluid in the cavity above the piston moves the air piston 15, compressing the spring 17.
  • the positive effect from the application of the proposed technical solution is as follows. Managing the local efforts of pressing the workpiece to the matrix has a positive effect on the process of shaping, expands technological capabilities, allowing you to make parts from hard-to-deform materials, and also increases the accuracy of parts manufacturing.
  • the compactness of the differentiated clamping device and the possibility of using a relatively simple and reliable governing body that can be manufactured for this part allows it to be installed in standard dies used on universal equipment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Control Of Presses (AREA)

Abstract

L'invention se rapporte au domaine du génie mécanique et concerne notamment le travail des métaux sous pression, et peut être utilisée dans des presses d'emboutissage de feuilles pour commander des efforts locaux selon un algorithme donné. Le résultat technique de la présente invention consiste en une meilleure capacité industrielle du processus d'emboutissage de feuille et une plus grande précision des pièces fabriquées, et en la possibilité de l'utiliser sur un équipement universel. A cette fin, on dispose sur la presse un dispositif de pression différencié assurant, lors du changement de forme de l'ébauche, un ajustement du flux et du déplacement du métal depuis la périphérie vers la zone du foyer de déformation grâce à la commande d'efforts locaux. Le dispositif de pression différencié est caractérisé en ce la presse comprend des secteurs fixés sur une platine, et chaque secteur de la presse comporte un dispositif hydraulique de transmission de l'effort selon un algorithme donné. Le dispositif de pression différencié comprend un dispositif hydraulique de transmission de l'effort selon un algorithme donné, et comprend un corps et une tige avec un piston; dans le piston se trouvent des anneaux avec une surface interne de section changeante qui, avec la surface périphérique du piston, définit un jour qui change avec le déplacement du piston par rapport au corps. En outre, le dispositif de pression différencié peut comprendre un dispositif hydraulique de transmission de l'effort selon un algorithme donné qui comprend un corps et une tige avec un piston; la tige est creuse et comprend des ouvertures radiales, tandis que sur le piston est disposé un anneau mobile capable de fermer les ouvertures dans le piston; dans le corps se trouve un axe de section variable dont une extrémité consiste en un piston disposé dans la cavité de la tige; l'anneau mobile et l'axe de section variable forment un jour qui change lors du déplacement de la tige creuse avec le piston et l'anneau par rapport à l'axe.
PCT/RU2017/000632 2017-07-25 2017-08-30 Procédé de formation d'une ébauche en feuille et dispositif de mise en œuvre WO2019022634A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP17894656.2A EP3453468A4 (fr) 2017-07-25 2017-08-30 Procédé de formation d'une ébauche en feuille et dispositif de mise en oeuvre
CN201780013464.8A CN109641256A (zh) 2017-07-25 2017-08-30 控制片材冲压模具上局部力的方法以及用于其实施的区别压紧装置
KR1020187026400A KR20200034916A (ko) 2017-07-25 2017-08-30 시트 스탬핑용 다이에서 국부적인 힘을 제어하는 방법 및 이의 구현을 위한 특수 고정 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2017126796A RU2685624C2 (ru) 2017-07-25 2017-07-25 Способ листовой штамповки и дифференцированное прижимное устройство штампа листовой штамповки
RU2017126796 2017-07-25

Publications (1)

Publication Number Publication Date
WO2019022634A1 true WO2019022634A1 (fr) 2019-01-31

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PCT/RU2017/000632 WO2019022634A1 (fr) 2017-07-25 2017-08-30 Procédé de formation d'une ébauche en feuille et dispositif de mise en œuvre

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Country Link
EP (1) EP3453468A4 (fr)
KR (1) KR20200034916A (fr)
CN (1) CN109641256A (fr)
RU (1) RU2685624C2 (fr)
WO (1) WO2019022634A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN112775275A (zh) * 2021-01-11 2021-05-11 蔡月 一种高精度五金冲压模具

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RU2723857C1 (ru) * 2019-04-29 2020-06-17 Общество с ограниченной ответственностью "Кипер" Устройство для управления секторным прижимом штампа для листовой штамповки
CN110421639A (zh) * 2019-09-06 2019-11-08 东莞市日源盛橡胶绝缘制品有限公司 一种带r角鼠标脚垫的生产设备及其生产工艺
CN110899448B (zh) * 2019-12-03 2021-01-12 哈尔滨工业大学 一种压边力分区加载的装置及方法

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Publication number Priority date Publication date Assignee Title
CN112775275A (zh) * 2021-01-11 2021-05-11 蔡月 一种高精度五金冲压模具

Also Published As

Publication number Publication date
CN109641256A (zh) 2019-04-16
EP3453468A4 (fr) 2019-10-09
RU2017126796A3 (fr) 2019-01-25
RU2017126796A (ru) 2019-01-25
EP3453468A1 (fr) 2019-03-13
RU2685624C2 (ru) 2019-04-22
KR20200034916A (ko) 2020-04-01

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