EP3590621A1 - Unité de came de matrice pourvue d'un dispositif de rappel auxiliaire - Google Patents

Unité de came de matrice pourvue d'un dispositif de rappel auxiliaire Download PDF

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Publication number
EP3590621A1
EP3590621A1 EP17866374.6A EP17866374A EP3590621A1 EP 3590621 A1 EP3590621 A1 EP 3590621A1 EP 17866374 A EP17866374 A EP 17866374A EP 3590621 A1 EP3590621 A1 EP 3590621A1
Authority
EP
European Patent Office
Prior art keywords
cam
return device
cam slider
slider
auxiliary return
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP17866374.6A
Other languages
German (de)
English (en)
Other versions
EP3590621A4 (fr
Inventor
Yoon Sun Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3590621A1 publication Critical patent/EP3590621A1/fr
Publication of EP3590621A4 publication Critical patent/EP3590621A4/fr
Withdrawn legal-status Critical Current

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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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/32—Perforating, i.e. punching holes in other articles of special shape
    • B21D28/325—Perforating, i.e. punching holes in other articles of special shape using cam or wedge mechanisms, e.g. aerial cams
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/40—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by wedge means

Definitions

  • the present invention relates to a mold cam unit having an auxiliary return device, and more particularly, to a mold cam unit in which an auxiliary return device is additionally provided to a cam slider and a cam driver to ensure efficient return movement of the cam slider, resulting in increased operational efficiency.
  • a mold cam unit is mounted to a press mold to change the operating direction of vertical reciprocating motion so as to enable angular motion.
  • a cam slider 3 is mounted on the lower surface of a box-shaped cam base 1 so as to be slidable in the longitudinal direction, a spring groove 6, into which a return spring 5 may be inserted, is formed in the cam slider 3, and a cam driver 7 is provided thereunder.
  • a punch which has completed a punching operation on a panel product, is configured to return in an opposite direction only by the elasticity of the return spring. Therefore, in a panel such as a high-tension steel plate having increased tensile strength and a panel having increased thickness, the resistance between the punching pin and the panel is increased, thus stopping return movement of the cam slider.
  • the cam slider may not easily move forwards due to the elasticity of the return spring at the time at which the cam slider initially comes into contact with the cam driver, which may cause increased shock force.
  • vertical surface pressure is increased, which may accelerate abrasion of a contact surface and reduce the lifespan of the cam device.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a mold cam unit, which may be used for a high-tension steel plate or the like, and may minimize friction during movement of a cam slider, thereby ensuring efficient return movement thereof.
  • a mold cam unit having an auxiliary return device including:
  • a cam base (20) including a slide portion formed in an installation space defined in a lower portion of a box-shaped body;
  • a cam slider (30) located in the space of the cam base (20) and including therein a return spring (32) so as to reciprocatingly move along the slide portion;
  • a cam driver (40) including a slide plate (41) mounted on an upper surface thereof to guide a lower slide groove (31) in the cam slider (30) to enable movement of the cam slider (30);
  • a pressure member (50) provided on a lower surface of the cam slider (30) and including a downwardly bent pressure surface (51); and the auxiliary return device (60) provided on a side surface of the cam driver (40) that faces the pressure surface (51) and configured to come into contact with the pressure surface (51) via forward movement of the cam slider (30), thereby being elastically compressed.
  • the cam slider (30) may include a positioning recess (33) formed in the lower surface thereof, and the pressure member (50) may include a positioning protrusion (52) formed on one surface thereof, which is in close contact with the lower surface of the cam slider (30).
  • the cam driver (40) may include an installation hole (42) formed in the side surface thereof, into which the auxiliary return device (60) is inserted, and a separation-preventing piece (43) fixedly provided on an outer wall surface thereof to prevent separation of the auxiliary return device (60).
  • the auxiliary return device (60) may include a housing (61) including one side surface formed with a passage hole and a remaining side surface that is open, a push member (62) including a push surface (62a) formed on one side thereof so as to be located in the passage hole (61a) in the housing (61) and configured to be guided so as to move along an inner space of the housing (61), a cover (63) configured to close the remaining side surface of the housing (61), and an elastic member (64) located between the push member (62) and the cover (63).
  • a housing (61) including one side surface formed with a passage hole and a remaining side surface that is open
  • a push member (62) including a push surface (62a) formed on one side thereof so as to be located in the passage hole (61a) in the housing (61) and configured to be guided so as to move along an inner space of the housing (61)
  • a cover (63) configured to close the remaining side surface of the housing (61)
  • an elastic member (64) located between the push member (62) and the cover (63).
  • auxiliary return device to a mold cam unit, it is possible to efficiently return a cam slider and a punching pin, which have completed a punching operation on a recently used type of panel having increased thickness, such as a high-tension steel plate having increased tensile strength. This may prevent faults of a product and malfunction.
  • an inner elastic member of the auxiliary return device is replaceable so as to be replaced and used to correspond to various products, such as a high-tension steel plate, it is possible to increase product satisfaction.
  • a mold cam unit having an auxiliary return device according to the present invention is devised to additionally provide the auxiliary return device to a cam slider and a cam driver so as to ensure efficient return movement of the cam slider, resulting in increased operational efficiency.
  • the mold cam unit broadly includes a cam base 20 in which a slide portion is formed in the installation space defined in the lower portion of a box-shaped body, a cam slider 30, which is located in the space of the cam base 20 and includes therein a return spring 32 so as to reciprocatingly move along the slide portion, and a cam driver 40, which includes a slide plate 41 mounted on the upper surface thereof to guide a lower slide groove 31 in the cam slider 30 to enable movement of the cam slider 30.
  • the mold cam unit is configured to perform a punching operation by changing the direction of vertical reciprocating motion of a press mold.
  • the cam unit further includes an auxiliary return device 60 in order to enable the cam slider 30, which has completed a punching operation, to efficiently perform return movement despite resistance between the punching pin 16 and the panel.
  • a pressure member 50 which includes a downwardly bent pressure surface 51, is provided on the lower surface of the cam slider 30.
  • the auxiliary return device 60 is provided on the side surface of the cam driver 40 so as to face the pressure surface 51. As the cam slider 30 moves forwards, the auxiliary return device 60 is brought into contact with the pressure surface 51, thereby being elastically compressed.
  • the cam slider 30 further includes a positioning recess 33 formed in the lower surface thereof
  • the pressure member 50 further includes a positioning protrusion 52 formed on one surface thereof, which is in close contact with the lower surface of the cam slider 30.
  • the configuration in which the positioning protrusion 52 and the positioning recess 33 are formed to have a trapezoidal shape so that they are provisionally assembled via insertion along the side surface thereof and are then coupled to each other is included in the scope of the present invention.
  • the auxiliary return device 60 mounted on the cam driver 40 includes a housing 61 having a pipe shape, one side surface of which is bent inwards to form a central passage hole 61a and the other side surface of which is open, a push member 62 having a push surface 62a formed on one side thereof so as to be slidably located in the passage hole 61a in the housing 61, the push member 62 being guided to move along the inner space of the housing 61, a cover 63 configured to close the other side surface of the housing 61, and an elastic member 64 located between the push member 62 and the cover 63.
  • the auxiliary return device 60 is configured by inserting the push member 62, which has the push surface 62a and is formed with a stepped separation preventing portion 62b, and the elastic member 64 into the housing 61, and thereafter closing the housing 61 with the cover 63.
  • the elastic member 64 elastically pushes the push member 62 in the leftward direction in the drawing so that the push surface 62a passes through the passage hole 61a and is exposed to the outside of the housing 61, the stepped separation preventing portion 62b is caught by the inner wall of the housing 61, which prevents separation of the push member 62.
  • the housing 61 and the cover 63 are coupled to each other using a known structure, such as screw-threads or clips.
  • the cover 63 may be configured so as to be easily separated from the housing 61 to enable easy replacement of the push member 62 and the elastic member 64.
  • the configuration in which the elastic member 64 includes stacked or abutted disc springs so that another disc spring may be added in consideration of the punching resistance strength of a panel is included in the scope of the present invention.
  • auxiliary return device 60 configured as described above is inserted into an installation hole 42, which is formed in the side surface of the cam driver 40, and a separation-preventing piece 43 is fixedly provided on the outer wall surface of the cam driver 40 to prevent separation of the auxiliary return device 60.
  • the separation-preventing piece 43 has a plate shape, and when screw members (not illustrated) provided on opposite sides of the separation-preventing piece are fastened and fixed to the side surface of the cam driver 40, the housing 61 of the auxiliary return device 60 is caught by the central surface of the separation-preventing piece, whereby separation of the auxiliary return device 60 is prevented.
  • FIGS. 6 to 8 illustrate the sequence of operating the mold cam unit according to the present invention.
  • a panel to be punched is mounted on the jig 14, or replacement of a punched panel is performed.
  • the pressure surface 51 of the pressure member 50 mounted on the underside of the cam slider 30 is brought into contact with the push surface 62a of the auxiliary return device 60, which protrudes from the side surface of the cam driver 40, thereby causing the push member 62 to move in the same direction as the direction in which the cam driver 30 moves so as to compress the elastic member 64.
  • the cam slider 30 moves in the rightward direction in the drawing, so that the punching pin 16, which is provided on the front end of the cam slider, punches the panel mounted on the jig 14. Thereafter, when a punching operation is completed, the cam slider 30 including the punching pin 16 returns in the leftward direction in the drawing.
  • the return movement of the cam slider 30, as illustrated in FIG. 9 is stably implemented by the elasticity of the elastic member 64 of the auxiliary return device 60 as well as the elasticity of the return spring 32 connected to the cam base 20. Then, considering the following operating sequence, the cam driver 40 and the cam slider 30 are separated from each other as illustrated in FIG. 6 , and the punched panel is separated from the cam slider.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
EP17866374.6A 2017-03-03 2017-03-03 Unité de came de matrice pourvue d'un dispositif de rappel auxiliaire Withdrawn EP3590621A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2017/002311 WO2018159884A1 (fr) 2017-03-03 2017-03-03 Unité de came de matrice pourvue d'un dispositif de rappel auxiliaire

Publications (2)

Publication Number Publication Date
EP3590621A1 true EP3590621A1 (fr) 2020-01-08
EP3590621A4 EP3590621A4 (fr) 2020-11-04

Family

ID=63370997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17866374.6A Withdrawn EP3590621A4 (fr) 2017-03-03 2017-03-03 Unité de came de matrice pourvue d'un dispositif de rappel auxiliaire

Country Status (2)

Country Link
EP (1) EP3590621A4 (fr)
WO (1) WO2018159884A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109465330A (zh) * 2018-12-04 2019-03-15 北京汽车股份有限公司 冲压模具的侧冲孔机构
CN115709244B (zh) * 2022-11-09 2023-06-09 珠海信城智能制造有限公司 一种具有自动脱模功能的层级分离式成型模具

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000326023A (ja) * 1999-05-20 2000-11-28 Sankyo Oilless Industry Inc カムユニット
KR100353911B1 (ko) * 2000-08-24 2002-09-27 현대자동차주식회사 자동차용 버클의 높이조절장치
JP2004237320A (ja) * 2003-02-06 2004-08-26 Sankyo Oilless Industry Inc カムスライダの戻し機構
JP4922888B2 (ja) * 2007-10-02 2012-04-25 三協オイルレス工業株式会社 カム装置
JP2012071312A (ja) * 2010-09-27 2012-04-12 Suzuki Motor Corp カム装置

Also Published As

Publication number Publication date
WO2018159884A1 (fr) 2018-09-07
EP3590621A4 (fr) 2020-11-04

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