EP3584019B1 - Dispositif d'arrachage pour moule de presse - Google Patents

Dispositif d'arrachage pour moule de presse Download PDF

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Publication number
EP3584019B1
EP3584019B1 EP17896382.3A EP17896382A EP3584019B1 EP 3584019 B1 EP3584019 B1 EP 3584019B1 EP 17896382 A EP17896382 A EP 17896382A EP 3584019 B1 EP3584019 B1 EP 3584019B1
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EP
European Patent Office
Prior art keywords
elastic
push
housing
punch
receiving portion
Prior art date
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Active
Application number
EP17896382.3A
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German (de)
English (en)
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EP3584019A4 (fr
EP3584019A1 (fr
Inventor
Yoon Sun Lee
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Individual
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Publication of EP3584019A4 publication Critical patent/EP3584019A4/fr
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Publication of EP3584019B1 publication Critical patent/EP3584019B1/fr
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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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/003—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
    • B21D45/006—Stripping-off devices
    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/06—Stripping-off devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/32—Discharging presses

Definitions

  • the present invention relates to a stripping device for a press mold, and more particularly to a stripping device for a press mold, which has an improved structure designed to separate a panel from a punch when the punch is retracted rearwards after performing a punching operation using a press mold in order to prevent the panel from being lifted along with the punch, thereby improving productivity and efficiency in a punching operation.
  • a cam unit for a mold is mounted on a press mold such that the cam unit is able to be tilted so as to change the direction of operation in a vertical reciprocating movement.
  • a cam slider 3 is mounted on the lower surface of a box-shaped cam base 1 so as to be anteroposteriorly slidable, and is provided therein with a spring hole 6 into which a return spring 5 is inserted.
  • a cam driver 7 is provided under the cam slider 3.
  • the conventional cam unit is constructed such that the punch, which has performed a punching operation on a panel product, is returned only by the elastic restoring force of the return spring, frictional resistance between the punch and the panel is increased in the case of recent panels such as a high-tensile steel plate having increased tensile strength and the case of a panel having increased thickness, thereby frequently causing problems with the returning movement of the punch.
  • the cam slider has to be moved forward at the moment of collision when the cam slider comes into contact with the cam driver, the cam slider cannot be smoothly moved forwards due to the high elasticity of the return spring, thereby increasing impulsive force. Subsequently, because the surface pressure between the contact surfaces is increased even while the cam driver is moved forwards, wear of the contact surfaces is accelerated, thereby shortening the service life of the cam device.
  • JP2007175779A discloses a puncher comprising a piercing punch, a punch retainer for holding the piercing punch, a cover which covers the piercing punch, from which the tip part of the piercing punch is projected and in the inside of which the whole punch retainer is housed, a stripper which is externally fitted to the piercing punch, pressing a work before piercing the work with the piercing punch, pulling out the piercing punch of the work after piercing, being housed in the cover and movable back and forth and having a stop flange formed at the rear end, and coil spring which is brought into contact with the stop flange of the stripper housed in the cover, with which the stripper outward is energized and also which is housed in the housing chamber.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a stripping device for a press mold, which is constructed such that a punch and a panel are able to be more conveniently separated from each other after a punching operation and a push member for pressing a panel is able to be replaced even in the state in which a punch holder and the punch are securely mounted on the front surface of the cam slider.
  • the present invention provides a stripping device (100) for a press mold, in which a punch holder (10) including a punch (16) is mounted on a front surface of an upper mold or a cam slider (3) for a press mold and in which a housing (30), which is provided therein with an elastic member (50) and a push member (70), is fixedly mounted on a front surface of the punch holder (10) such that the push member (70) is compressed against restoring force when contacting an object to be punched, the stripping device (100) including the housing (30), which includes a push-member-sliding portion (31) and an elastic-member-receiving portion (35), which are continuously formed in an inner cylindrical surface thereof toward a rear side from a front side, the housing (30) including a support flange (39) having therein a fixing hole (39a), which is formed in an outer peripheral surface of a rear end thereof so as to be coupled to the front surface of the punch holder (10) by means of a bolt,
  • the fixed plate (60) may be fitted into a fixed-plate-fitting groove (36), which is formed in a rear end of the elastic-member-receiving portion (35) so as to have a stepped portion, and the fixed plate (60) may be provided on an outer peripheral surface thereof with an inclined surface (61), which has a smaller diameter at a rear end thereof than at a front end thereof, and may be forcibly fitted into the rear end of the housing (30) so as to be integrally coupled to the housing (30).
  • the elastic-member-receiving portion (35) may include a concave fixed-plate-fitting groove (37), which is formed in an inner peripheral surface of a rear end thereof, and the fixed plate (60) may include a convex fixed-plate-fitting protrusion (62), which is formed on an outer peripheral surface thereof so as to correspond to the fixed-plate-fitting groove (37), the fixed plate (60) being forcibly fitted into the elastic-member-receiving portion (35) so as to be coupled thereto.
  • the push-member-sliding portion (31) of the housing (30) may include a protruding anti-rotation surface (33), and the guide part (71), which is slidably moved along an inner surface of the push-member-sliding portion (31), may include a rotation-blocking surface (71a) corresponding to the anti-rotation surface (33), whereby the push member (70) is slidable without being rotated.
  • the stripping device which is further provided to a cam unit for a mold, is able to efficiently return the cam slider and the punch, which have been used perform a punching operation on recent panels such as a high tension panel having increased tensile strength and a panel having increased thickness, so as to prevent the panel from being lifted along with the punch, thereby preventing defect and malfunction of products.
  • the stripping device according to the present invention is able to be mounted on an existing punch holder and allows the push member to be easily dismantled or replaced in the state of being mounted on the punch holder, it is possible to improve the convenience of a mounting operation and efficiency in the production of products.
  • the disc springs which are applied as the elastic member, allow realization of tensile strength higher than that of existing coil springs, and the fixed plate adapted to be forcibly fitted in the housing ensures stability of the stacked disc springs. Furthermore, since the stacked structure and the number of disc springs are controlled according to the kind of panel, it is possible to improve the efficiency of a punching operation using a mold.
  • a stripping device for a press mold according to the present invention has an improved structure designed to separate a panel from a punch when the punch is retracted rearwards after performing a punching operation using a press mold in order to prevent the panel from being lifted along with the punch, thereby improving productivity and the efficiency of a punching operation.
  • the stripping device 100 is mounted on a punch holder 10 including a punch 16 in front of a cam slider 3 for a press mold.
  • a housing 30 is provided therein with an elastic member 50 and a push member 70.
  • the push member 70 comes into contact with a panel P, the push member 70 is pushed rearwards while the elastic member 50 is compressed against the elastic restoring force thereof.
  • the cam slider 3 is retracted rearwards after the punching operation, the push member 70 is pushed forwards by virtue of the restoring force of the elastic member 50, thereby preventing the panel P, which is in contact with the push member 70, from being lifted along with the punch 16.
  • the stripping device 100 is assembled in such a manner that a movable plate 40, the elastic member 50 and a fixed plate 60 are inserted into the cylindrical housing 30 in that order and the end of the housing 30 at which the inserted fixed plate 60 is positioned is pressed and narrowed inwards, thereby fastening the fixed plate 60 to the housing 30.
  • the housing 30 includes a push-member-sliding portion 31 and an elastic-member-receiving portion 35, which are formed in the inner peripheral surface thereof in a downward direction from above in the drawings.
  • the housing 30 is provided on the outer peripheral surface thereof with a support flange 39, which projects outwards and has a fixing hole 39a, thereby enabling the housing 30 to be coupled to the front surface of the cam slider 30 by means of a fixing bolt.
  • the push-member-sliding portion 31 has a diameter smaller than that of the elastic-member-receiving portion 35 so as to define a stepped surface therebetween, the movable plate 40, which is received in the elastic-member-receiving portion 35, is blocked by the stepped surface, thereby restricting the movement of the movable plate 40.
  • the movable plate 40 is configured so as to have the same contour as that of the elastic-member-receiving portion 35 and to have a hole through which the punch 16 passes. Accordingly, the movable plate 40, which is inserted into the elastic-member-receiving portion 35, is blocked and supported by the stepped surface connected to the push-member-sliding portion 31.
  • the elastic member 50 is embodied by tray-shaped disc springs, which are configured so as to have the same contour as that of the elastic-member-receiving portion 35 and to have a central hole through which the punch 16 passes and which are inserted into the housing 30 so as to be stacked to each other.
  • the foremost disc spring that contacts the movable plate 40 supports the peripheral portion of the movable plate 40 so as to stably support the movable plate 40, which is slid along the elastic-member-receiving portion 35, as illustrated in FIG. 4 .
  • the fixed plate 60 is configured so as to have an outer diameter larger than the inner diameter of the elastic-member-receiving portion 35 and to have therein the central hole through which the punch 16 passes. Accordingly, the fixed plate 60 is fitted into the elastic-member-receiving portion 35 in an interference manner. The rear end of the housing is pressed and narrowed and is thus integrally coupled to the fixed plate 60.
  • the holes (having no reference numeral), which are centrally formed in the movable plate 40, the elastic member 50 and the fixed plate 60, allow the punch 16 to pass therethrough without interfering with the components. A description of the holes is omitted.
  • the rear end of the elastic-member-receiving portion 35 is formed so as to have a fixed-plate-fitting groove 36 having a stepped portion, and the fixed plate 60 is fitted into the fixed-plate-fitting groove 36 and is mounted therein.
  • the outer peripheral surface of the fixed plate 60 is configured such that the front end thereof that is fitted into the elastic-member-receiving portion 35 has a diameter smaller than that of the rear end thereof, thereby defining an inclined surface 61.
  • the rear end of the elastic-member-receiving portion 35 is provided in the inner peripheral surface thereof with a concave fixed-plate-fitting groove 37, and the fixed plate 60 is provided on the outer peripheral surface thereof with a convex fixed-plate-fitting protrusion 62 corresponding to the fixed-plate-fitting groove 37, as illustrated in FIG. 6 . Consequently, the fixed plate 60 can be integrally coupled to the housing 30 by forcibly fitting the fixed plate 60 into the elastic-member-receiving portion 35.
  • This embodiment also falls within the scope of the present invention.
  • the elastic-member-receiving portion 35 is first formed such that the rear end thereof, which is positioned outside the fixed-plate-fitting groove 37, is widened radially outwards, and the fixed plate 60 is fitted into the fixed-plate-fitting groove 37 such that the fixed-plate-fitting protrusion 62 is positioned in the fixed-plate-fitting groove 37. Subsequently, the rear end of the housing 30 is pressed radially inwards such that the fixed-plate-fitting protrusion 62 is integrally engaged with the fixed-plate-fitting groove 37.
  • Each of the fixed-plate-fitting groove 37 and the fixed-plate-fitting protrusion 62 may be formed so as to have various sections, such as a "U” shape or a "V" shape.
  • the push member 70 is slidably inserted along the push-member-sliding portion 31 connected to the elastic-member-receiving portion 35. Subsequently, a retaining ring 80 is fitted into the front end of the push-member-sliding portion 31 in order to prevent separation of the push member 70.
  • the push member 70 includes a guide part 71, which is centrally and longitudinally provided therein with a pin through hole 73 through which the punch 16 moves and which is slidably inserted into the push-member-sliding portion 31 from the front side so as to come into contact with the movable plate 40, and a projection part 72, which has a diameter smaller than that of the guide part 71 and which is integrally formed with the guide part 71.
  • the projection part 72 is configured so as to project further outwards than the push-member-sliding portion 31.
  • a ring-fitting groove 32 is formed in the inner peripheral surface of the push-member-sliding portion 31 in front of the guide part 71, and the retaining ring, which has an inner diameter smaller than the outer diameter of the guide part 71, is removably fitted into the ring-fitting groove 32, with the result that the guide part 71 of the push member 70 is blocked by the retaining ring 80, thereby preventing the push member 70 from being separated forwards.
  • the push-member-sliding portion 31 of the housing 30 is provided with a protruding anti-rotation surface 33, and the guide part 71 of the push member 70, which is slid along the inner surface of the push-member-sliding portion 31, is provided with a rotation-blocking surface 71a corresponding to the anti-rotation surface 33. Consequently, when the push member 70 is inserted into the housing 30, only the sliding movement of the push member 70 is allowed.
  • the housing which includes the push-member-sliding portion 31, is further provided in the outer surface thereof with a tool-fitting groove 34 communicating with the ring-fitting groove 31. Consequently, the retaining ring 80 is conveniently separated from the ring-fitting groove 32 by inserting a tool into the tool-fitting groove 34 and lifting the retaining ring 80.
  • the retaining ring 80 is configured so as to have a circular section in this embodiment, a general snap ring 81 may also be used, as illustrated in FIG. 6 .
  • the ring-fitting groove 32 is configured so as to have a rectangular section corresponding to the cross section of the snap ring 81.
  • the stripping device 100 which is constructed in the above-described manner, will be described with reference to FIGS 4 and 5 among the accompanying drawings.
  • the support flange 39 of the housing 30 is first disposed on the punch holder 10, which includes the punch 16, and is coupled thereto by fastening a fixing bolt to the punch holder 10 through the fixing hole 39a.
  • the punch 16 extends through the fixed plate 60, the elastic members 50 and the movable plate 40 in the housing 30 and is disposed in the pin through hole 73 in the push member 70.
  • the projection part 72 of the push member 70 first comes into contact with the panel P.
  • the punch holder 10 and the housing 30, which are coupled to the cam slider 3, are retracted rearwards and are moved to the initial positions thereof, and thus the push member 70 is pushed forwards by the restoring force of the compressed elastic members 50.
  • the projection part 72 of the push member 70 which comes into contact with the panel, is made of a metal material softer than that of the panel P in order to prevent damage to the panel P.
  • the push member 70 has to be replaced with a new push member 70.
  • the cam slider 3 is first retracted rearwards such that the projection part 72 of the push member 70 is projected forwards from the housing 30. Thereafter, the retaining ring 80 is removed from the ring-fitting groove 32 using an additional tool.
  • the guide part 71 of the push member 70 is slidably moved forwards along the push-member-sliding portion 31 and is thus separated from the housing 30, and the guide part 71 of a new push member 70 is inserted along the push-member-sliding portion 31.
  • the retaining ring 80 is fitted into the ring-fitting groove 32, thereby conveniently completing the replacement operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Claims (4)

  1. Dispositif de démontage (100) pour un moule à compression, dans lequel un support de poinçon (10) incluant un poinçon (16) est monté sur la surface antérieure d'un moule supérieur ou d'une glissière de came (3) pour un moule à compression, et dans lequel un boîtier (30), qui est procuré dedans avec un élément élastique (50) et un élément de poussée (70), est monté de manière fixe sur une surface de front du support de poinçon (10), de manière que ledit élément de poussée (70) soit comprimé contre la force de restauration, lorsqu'il prend contact avec un objet à poinçonner, ledit dispositif de démontage (100) comprenant :
    le boîtier (30), qui comprend une partie de glissage de l'élément de poussée (31), et une partie de réception de l'élément élastique (35), qui sont formées en continu dans une surface cylindrique intérieure de celui-ci vers un côté derrière depuis un côté de front, ledit boîtier (30) comprenant en outre une bride de support (39) ayant un trou de fixage (39a), qui est formé dans une surface périphérique extérieure d'une extrémité derrière de celui-ci, de manière à être couplé à la surface de front du support de poinçon (10) au moyen d'un boulon,
    une plaque mobile (40), qui est insérée dans la partie de réception de l'élément élastique (35) depuis le côté arrière, et est bloquée par une partie échelonnée entre la partie de réception de l'élément élastique (35) et la partie de glissage de l'élément de poussée (31), la plaque mobile (40) ayant un trou central formé dedans au travers duquel ledit poinçon (16) passe,
    l'élément élastique (50) ayant un trou central formé dedans au travers duquel ledit poinçon (16) passe, l'élément élastique (50) étant inséré dans la partie de réception de l'élément élastique (35), et l'élément élastique (50) étant comprimé, quand la plaque mobile (40) est bougée le long de la partie de réception de l'élément élastique (35),
    une plaque fixe (60), dans laquelle un trou central est formé au travers duquel ledit poinçon (16) passe, ladite plaque fixe (60) étant insérée dans une surface périphérique intérieure de la partie de réception de l'élément élastique (35) à travers une extrémité ouverte arrière de la partie de réception de l'élément élastique (35), et ensuite étant couplée à l'extrémité arrière du boîtier (30) en pressant l'extrémité arrière du boîtier (30) vers l'intérieur,
    ledit élément de poussée (70) comprenant une partie de guidage (71) procurée sur son côté arrière, qui est insérée à glissement dans la partie glissant l'élément de poussée 31 depuis le côté de front du boîtier (30), et qui vient en contact avec la plaque mobile (40), et une partie saillante (72) procurée sur son côté de front, qui présente un diamètre inférieur à celui de la partie de guidage (71), ledit élément de poussée (70) comprenant une perforation longitudinale traversante (73), au travers de laquelle le poinçon (16) est bougé, et
    une bague de retenue (80), qui est ajustée de manière amovible dans une rainure d'ajustement de bague (32), formée dans une surface périphérique intérieure d'une extrémité de front de ladite partie de glissage de l'élément de poussée (31), pour empêcher la partie de guidance (71) dudit élément de poussée (70) d'être bougée en avant.
  2. Dispositif de démontage selon la revendication 1, dans lequel la plaque fixée (60) est ajustée dans une rainure d'ajustement de plaque fixée (36), qui est formée dans une extrémité arrière de la partie de réception de l'élément élastique (35), pour avoir une partie échelonnée, et dans lequel ladite plaque fixe (60) est procurée sur son surface périphérique extérieure avec une surface inclinée (61), qui présente un diamètre à l'extrémité arrière inférieur à celui de sa partie de front, et est ajustée par force dans l'extrémité arrière du boîtier (30), pour être couplée intégralement au boîtier (30).
  3. Dispositif de démontage selon la revendication 1, dans lequel ladite partie de réception de l'élément élastique (35) comprend une rainure concave d'ajustement de plaque fixée (37), qui est formé dans une surface périphérique intérieure d'une extrémité derrière de celui-ci, et ladite plaque fixée (60) comprend une saillie convexe d'ajustement de plaque fixée (62), qui est formée sur une surface périphérique extérieure de celle-ci, pour correspondre à la rainure d'ajustement de plaque fixée (37), la plaque fixée (60) étant ajustée par force dans la partie de réception de l'élément élastique (35), pour être couplée à celle-ci.
  4. Dispositif de démontage selon la revendication 1, dans lequel la partie de glissage de l'élément de poussée (31) du boîtier (30) comprend une surface anti-rotation saillante (33), et la partie de guidage (71), qui est bougée à glissement le long d'une surface intérieure de la partie de glissage de l'élément de poussée (31), comprend une surface bloquante de rotation (71a) correspondant à la surface anti-rotation (33), ce qui fait que l'élément de poussée (70) est glissant sans être mis à rotation.
EP17896382.3A 2017-02-14 2017-02-14 Dispositif d'arrachage pour moule de presse Active EP3584019B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2017/001583 WO2018151337A1 (fr) 2017-02-14 2017-02-14 Dispositif d'arrachage pour moule de presse

Publications (3)

Publication Number Publication Date
EP3584019A1 EP3584019A1 (fr) 2019-12-25
EP3584019A4 EP3584019A4 (fr) 2020-10-07
EP3584019B1 true EP3584019B1 (fr) 2022-06-29

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Family Applications (1)

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EP17896382.3A Active EP3584019B1 (fr) 2017-02-14 2017-02-14 Dispositif d'arrachage pour moule de presse

Country Status (4)

Country Link
EP (1) EP3584019B1 (fr)
JP (1) JP6792121B2 (fr)
CN (1) CN110087794B (fr)
WO (1) WO2018151337A1 (fr)

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CN109454167B (zh) * 2018-12-25 2024-02-27 桂林电子科技大学 一种离合器整体式波形片单步成型模具
CN111745036B (zh) * 2020-06-30 2024-06-18 天津职业技术师范大学(中国职业培训指导教师进修中心) 一种汽车覆盖件修边模具
CN112275916B (zh) * 2020-09-22 2024-03-15 江西江铃汽车集团上饶实业有限公司 一种用于汽车配件冲压的模具安装机构
CN112974607B (zh) * 2021-02-23 2024-04-02 六安市道山网业有限公司 一种渔网网坠器生产加工装置
CN114211569B (zh) * 2021-12-15 2023-10-24 英科医疗科技股份有限公司 一种带有铁氟龙涂层的刀模
CN114273493B (zh) * 2021-12-21 2023-11-28 安徽共青机电装备制造股份有限公司 一种密封垫片加工用成型机
CN114535444A (zh) * 2022-02-28 2022-05-27 禧阅航空技术(上海)有限公司 一种冲压圆柱形筒体自动退料装置
CN114734598B (zh) * 2022-04-19 2023-12-22 合肥汇凌汽车零部件有限公司 一种能快速组装的汽车零部件模具
CN115555456A (zh) * 2022-09-21 2023-01-03 宁海县锐新模具有限公司 一种扣点限位机构

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JP4627956B2 (ja) * 2002-03-13 2011-02-09 株式会社アマダ 上型装置
JP4444618B2 (ja) * 2003-10-08 2010-03-31 株式会社アマダ パンチプレスにおけるパンチ金型とダイ金型との芯出し方法およびパンチ金型
JP5827453B2 (ja) * 2005-08-08 2015-12-02 ディヴィッド ジェイ メルリング パンチリテーナー用ストリッパーユニット
JP4871609B2 (ja) * 2006-02-24 2012-02-08 株式会社アマダ ストリッパープレート装着装置
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Also Published As

Publication number Publication date
WO2018151337A1 (fr) 2018-08-23
EP3584019A4 (fr) 2020-10-07
JP2020501909A (ja) 2020-01-23
EP3584019A1 (fr) 2019-12-25
JP6792121B2 (ja) 2020-11-25
CN110087794B (zh) 2021-02-26
CN110087794A (zh) 2019-08-02

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