US20200346268A1 - Press molding device and manufacturing method thereof - Google Patents

Press molding device and manufacturing method thereof Download PDF

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Publication number
US20200346268A1
US20200346268A1 US16/935,233 US202016935233A US2020346268A1 US 20200346268 A1 US20200346268 A1 US 20200346268A1 US 202016935233 A US202016935233 A US 202016935233A US 2020346268 A1 US2020346268 A1 US 2020346268A1
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US
United States
Prior art keywords
die
work piece
molding
trimming
blank holder
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.)
Abandoned
Application number
US16/935,233
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English (en)
Inventor
Tsutomu SERIZAWA
Koji OHBUCHI
Tamiya KIKAWA
Diyun MIAO
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.)
Unipres Corp
Original Assignee
Unipres Corp
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 Unipres Corp filed Critical Unipres Corp
Assigned to UNIPRES CORPORATION reassignment UNIPRES CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MIAO, DIYUN, KIKAWA, TAMIYA, OHBUCHI, KOJI, SERIZAWA, TSUTOMU
Publication of US20200346268A1 publication Critical patent/US20200346268A1/en
Abandoned legal-status Critical Current

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    • 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
    • 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
    • B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
    • 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
    • B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling

Definitions

  • PCT/JP2018/030347 The contents of the following PCT application are incorporated herein by reference: PCT/JP2018/030347.
  • the present invention relates to a press molding device and a manufacturing method thereof.
  • Non-Patent Document 1 discloses a manufacturing method which presses and molds a heated work piece while cooling the heated work piece and then cuts an end portion of the work piece by lowering a trim die.
  • the above-described manufacturing method requires, to prevent the trim die from moving ahead of a pad during molding, to provide a reaction force generation devices such as hydraulic tanker and hydraulic pressure generation device for controlling the hydraulic tanker in a metallic die.
  • Patent Document 1 discloses providing a regulation portion for regulating a posture of the work piece in the trim die and a blank holder so that the work piece does not contact a punch side cutting edge and a die side cutting edge during press molding of the work piece before trimming.
  • Non-Patent Document 1 “Press Technology August 2014” Vol. 52, No. 8, Pages 23-26 Development of a manufacturing method for in-die trim in hot stamp (hot stamping)”, NIKKAN KOGYO SHIMBUN, LTD.
  • Patent Document 1 Japanese Patent No. 6256571
  • a press molding device may be a press molding device that presses and molds the heated work piece while cooling the work piece.
  • the press molding device may include a first die for supporting the work piece.
  • the press molding device may include a second die that is arranged to face the first die.
  • the first die may include a punch having a first molding surface for molding the work piece.
  • the second die may include a die portion that includes the second molding surface facing the first molding surface and is used to mold the work piece.
  • the second die may include a trimming portion configured integrally with the die portion.
  • the trimming portion may include a blade portion that cuts an end portion of the work piece.
  • the die portion may include the flow path for circulating the refrigerant to cool the work piece along the second molding surface.
  • the first die may include a blank holder that is movably arranged along a side surface extending from the first molding surface of the punch and includes a supporting surface for supporting the end portion of the work piece.
  • the trimming portion may be fixed to a fixed surface of the die portion that faces the blank holder, which fixed surface extends from the second molding surface so that the trimming portion is configured integrally with the die portion.
  • the trimming portion may be removably fixed to the fixed surface of the die portion.
  • the trimming portion may include a clamping surface that faces the supporting surface and clamps the end portion of the work piece with the supporting surface and include a protrusion where the clamping surface protrudes toward the blank holder side than the blade.
  • the second molding surface may include a step portion for folding the work piece and molding a flange portion.
  • the blade may be provided to an inner side of a tangential line that is in contact with a corner portion of the projection and the step portion.
  • the die portion and the trimming portion are moved toward the first die and also the blank holder is moved along the side surface of the punch so that the work piece is pressed and molded with the first molding surface and the second molding surface and the blade may cut the end portion of the work piece before the die portion and the trimming portion reach a bottom dead point.
  • the heated work piece is pressed and molded while being clamped between the first die and the second die and being cooled so that a press-molded article is manufactured.
  • the first die may include the punch having the first molding surface for molding the work piece.
  • the first die may include the blank holder that is movably arranged along the side surface extending from the first molding surface of the punch and includes the supporting surface for supporting the end portion of the work piece.
  • the second die may include the die portion that includes the second molding surface facing the first molding surface and is used to mold the work piece.
  • the second die may include the trimming portion configured integrally with the die portion.
  • the trimming portion may include the blade portion for cutting the end portion of the work piece.
  • the die portion may include the flow path for circulating the refrigerant to cool the work piece along the second molding surface.
  • the manufacturing method may include a step in which with the end portion of the work piece being clamped between the blank holder and the trimming portion, the die portion and the trimming portion are moved toward the first die and also the blank holder is moved along the side surface of the punch so that the work piece is pressed and molded with the first molding surface and the second molding surface, and the blade portion cuts the end portion of the work piece before the die portion and the trimming portion reach the bottom dead point.
  • FIG. 1A is a drawing for explaining one example of a hot stamp in-die trim method.
  • FIG. 1B is a drawing for explaining one example of a hot stamp in-die trim method.
  • FIG. 1C is a drawing for explaining one example of a hot stamp in-die trim method.
  • FIG. 1D is a drawing for explaining one example of a hot stamp in-die trim method.
  • FIG. 2 is an enlarged view of a portion of a pad that molds the flange portion of the work piece.
  • FIG. 3A is a drawing for explaining a press molding device according to the present embodiment.
  • FIG. 3B is a drawing for explaining a press molding device according to the present embodiment.
  • FIG. 3C is a drawing for explaining a press molding device according to the present embodiment.
  • FIG. 4 is an enlarged view of a trimming portion and a portion of a die portion near the trimming portion.
  • a hot stamp molding also referred to as hot press molding, PHS or the like
  • PHS hot press molding
  • one possible solution is to cool the press-molded article to have an strength equivalent to 1500 MPa, and then cut thus cooled press-molded article.
  • a portion of the press-molded article that has been cooled and then cut has a high strength (hardness) and residual stress, and thus, there is a possibility that a delayed fracture occurs.
  • it is considered to cut the work piece in the high temperature condition before being cooled.
  • the strength (hardness) and the residual stress of the press-molded article are lowered, and thus, the possibility of the occurrence of the delayed fracture can be reduced.
  • FIG. 1A , FIG. 1B , FIG. 1C , and FIG. 1D is a drawing for explaining one example of the hot stamp in-die trim method in which the work piece in the high temperature condition is cut before being cooled. According to this manufacturing method, the heated work piece is pressed and molded while being cooled, and then the end portion of the work piece is cut by lowering the trim die.
  • the press molding device includes an upper die 10 and a lower die 30 .
  • a work piece 50 is arranged between the upper die 10 and the lower die 30 .
  • the upper die 10 includes a die holder 12 , a trim die 14 , a pad 16 , and a reaction force generation device 20 such as hydraulic tanker.
  • a pad 16 includes a flow path 19 that is arranged along a molding surface 16 a and is used to circulate a refrigerant such as water for cooling the work piece 50 .
  • the lower die 30 includes a punch holder 32 , a punch 34 , a blank holder 36 , and a reaction force generation device 38 such as spring.
  • the punch 34 includes the flow path 39 for circulating the refrigerant such as water for cooling the work piece 50 along a molding surface 34 a.
  • the trim die 14 is fixed to the die holder 12 .
  • the pad 16 is coupled to a reaction force generation device 20 so as to be movable in a direction toward and away from the die holder 12 .
  • the die holder 12 holds the reaction force generation device 20 .
  • the punch 34 is fixed to the punch holder 32 .
  • the blank holder 36 is coupled to the punch holder 32 via the reaction force generation device 38 so as to be movable in a direction toward and away from the punch holder 32 .
  • an end portion 52 of the heated work piece 50 is clamped between a clamping surface 14 a of the trim die 14 and the supporting surface 36 a of the blank holder 36 .
  • the die holder 12 receives a pressing pressure 11 and moves to the lower die 30 side.
  • the pad 16 receives a hydraulic pressure 17 from the reaction force generation device 20 and moves to the lower die 30 side together with the trim die 14 .
  • the work piece 50 is pressed and molded with the molding surface 16 a of the pad 16 and the molding surface 34 a of the punch 34 .
  • FIG. 2 is an enlarged view of a portion in FIG. 1C surrounded by a reference sign 60 .
  • a width w of the flange portion 54 of the work piece 50 is very shorter than a depth h of a deep drawing molding and therefore, it is sometimes difficult to secure the strength of the pad 16 .
  • the pad 16 includes the flow path 19 for circulating the refrigerant such as water for cooling the work piece 50 .
  • a thickness 16 c of the pad 16 is further reduced. Therefore, if the width of the flange portion of the press-molded article is narrow, it is sometimes more difficult to arrange and process the flow path 19 of the pad 16 while securing the strength of the pad 16 .
  • the press molding device does not use the hydraulic tanker and trims the work piece during the hot stamp molding process. Further, according to the press molding device, regardless of the shape of the work piece, it is possible to arrange the flow path to the pad while securing the strength of the pad.
  • a hot press molding apparatus presses and molds the heated work piece 500 while cooling the heated work piece 500 to manufacture the press-molded article.
  • the hot press molding apparatus includes the upper die 100 and the lower die 200 as metallic dies.
  • the upper die 100 is one example of the second die.
  • the lower die 200 is one example of the first die.
  • the upper die 100 may function as the first die and the lower die 200 may function as the second die.
  • the lower die 200 supports the work piece 500 .
  • the upper die 100 is arranged to face the lower die 200 .
  • the work piece 500 may be a plate material.
  • the blank material 500 may be the plate material made of a metal material such as hard steel, mild steel, aluminum, titanium or copper.
  • the lower die 200 includes a punch holder 202 , a punch 204 , a blank holder 206 , and a reaction force generation device 208 such as spring.
  • the punch 204 faces the upper die 100 and includes the molding surface 204 a for molding the work piece 500 .
  • the molding surface 204 a is one example of the first molding surface.
  • the blank holder 206 is movably arranged along the side surface 204 b that extends from the molding surface 204 a of the punch 204 to the punch holder 202 side and includes the supporting surface 206 a for supporting the end portion 502 of the work piece 500 .
  • the punch 204 includes the flow path 209 that is arranged along the molding surface 204 a and is used to circulate the refrigerant for cooling the work piece 500 .
  • the upper die 100 includes a die holder 102 , a die portion 104 , a movable pad 108 , and a trimming portion 110 .
  • the die portion 104 is fixed to the die holder 102 .
  • the die portion 104 includes the molding surface 104 a that faces the molding surface 204 a of the punch 204 and is sued to mold the work piece 500 .
  • the molding surface 104 a is one example of the second molding surface.
  • the die portion 104 includes the flow path 109 that is arranged along the molding surface 104 a and is used to circulate the refrigerant for cooling the work piece 500 .
  • the movable pad 108 includes the flow path 113 for circulating the refrigerant for cooling the work piece 500 .
  • the upper die 100 may not include the movable pad 108 .
  • the lower die 200 may not include the blank holder 206 .
  • the trimming portion 110 may be configured integrally with the die portion 104 . As a result, it is possible to prevent the strength of the die portion 104 from being reduced.
  • the trimming portion 110 is fixed to the fixed surface 104 b of the die portion 104 that faces the blank holder 206 , which fixed surface 104 b extends from the molding surface 104 a so that the trimming portion 110 is configured integrally with the die portion 104 .
  • the trimming portion 110 may be removably fixed to the fixed surface 104 b of the die portion 104 via the bolt 130 . Thereby, the replacement of the trimming portion 110 can be facilitated.
  • the trimming portion 110 may be physically integrated with the die portion 104 .
  • the trimming portion 110 may be made of the same material as the die portion 104 and may be physically integrated with the die portion 104 .
  • Integrally configuring the trimming portion 110 and the die portion 104 is a concept including a form in which the trimming portion 110 and the die portion 104 are separately configured and the trimming portion 110 and the die portion 104 are integrally connected by bolting, bonding and the like besides a form in which the trimming portion 110 and the die portion 104 are made of the same material and physically integrated.
  • the trimming portion 110 includes the blade 110 a for cutting the end portion 502 of the work piece 500 .
  • the trimming portion 110 has the blade 110 a at the side of the molding surface 104 a side.
  • the trimming portion 110 further includes the protrusion 112 that forms a step from the blade 110 a to the blank holder 206 side.
  • the protrusion 112 includes the clamping surface 110 b that faces the supporting surface 206 a of the blank holder 206 and clamps the end portion 502 of the work piece 500 with the supporting surface 206 a .
  • the clamping surface 110 b protrudes to the blank holder 206 side than the blade 110 a .
  • a cross section of the corner of the molding surface 204 a side of the protrusion 112 may be curved.
  • the pressing pressure 111 is added to the die holder 102 .
  • the die portion 104 and the trimming portion 110 move toward the lower die 200 and the blank holder 206 moves along the side surface 204 b of the punch 204 .
  • the work piece 500 is clamped between the die portion 104 and the punch 204 , is pressed with the molding surface 204 a and the molding surface 104 a , and is molded to a predetermined shape. Further, as illustrated in FIG. 3C , before the die portion 104 and the trimming portion 110 reach the bottom dead point, the blade 110 a cuts the end portion 502 of the work piece 500 . The blade 110 a may cut the end portion 502 of the work piece 500 immediately before the die portion 104 and the trimming portion 110 reach the bottom dead point.
  • the work piece 500 in the clamped state moves toward the lower die 200 that functions as the second die, and then is molded and cut.
  • the heated work piece 500 is molded toward the molding surface 204 a of the punch 204 while being pressed. If the work piece 500 contacts with the blade 110 a while the work piece 500 is pressed, the blade 110 a is likely to be abraded due to the friction with the work piece 500 . Therefore, the trimming portion 110 includes the protrusion 112 where the clamping surface 110 b protrudes to the blank holder 206 side than the blade 110 a . As a result, before the work piece 500 is cut and during pressing of the work piece 500 , the work piece 500 is less likely to contact the blade 110 a . Therefore, it is possible to prevent the abrasion of the blade 110 a due to the friction with the work piece 500 .
  • the trimming portion 110 is fixed to the fixed surface 104 b of the die portion 104 that faces the blank holder 206 , which fixed surface 104 b extends from the molding surface 104 a .
  • the trimming portion 110 is fixed to the die portion 104 instead of the die holder 102 .
  • the width of the die portion 104 is not limited to the width of the flange portion of the press-molded article. Therefore, it is possible to provide the flow path 109 for circulating the refrigerant such as water inside the die portion 104 without the limitation in the width of the flange portion of the press-molded article. As a result, even if the flow path 109 is provided, it is possible to prevent the reduction in the strength of the die portion 104 .
  • the molding surface 104 a of the die portion 104 includes the step portion 104 c for folding the work piece 500 and molding the flange portion.
  • the step portion 104 c is formed by standing from an end portion for molding the flange portion of the molding surface 104 a .
  • the blade 110 a may be provided inside a virtual tangential line 610 that is in contact with the corner portion 112 d of the protrusion 112 and the step portion 104 c .
  • the blade 110 a may be provided inside a tangent plane that is in contact with the corner portion 112 d and the step portion 104 c .
  • the blade 110 a may be provided outside the tangential line 610 as long as the blade 110 a is provided inside the molding analysis line.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Punching Or Piercing (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
US16/935,233 2018-08-15 2020-07-22 Press molding device and manufacturing method thereof Abandoned US20200346268A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/030347 WO2020035915A1 (ja) 2018-08-15 2018-08-15 プレス成形装置、及び製造方法

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/030347 Continuation WO2020035915A1 (ja) 2018-08-15 2018-08-15 プレス成形装置、及び製造方法

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US (1) US20200346268A1 (zh)
JP (1) JP6651057B1 (zh)
CN (1) CN111344080A (zh)
MX (1) MX2020009201A (zh)
WO (1) WO2020035915A1 (zh)

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CN112974580B (zh) * 2021-05-11 2021-07-30 四川英创力电子科技股份有限公司 一种弯折电路板及其加工设备和方法
KR102578761B1 (ko) * 2023-02-20 2023-09-13 민지훈 동부스바 가공시스템

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JPS5996529A (ja) 1982-11-24 1984-06-04 Hitachi Condenser Co Ltd 磁気記録媒体
JPH0644486Y2 (ja) * 1988-04-14 1994-11-16 株式会社ユタカ技研 面取り付きプレス装置
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CN103990712A (zh) * 2014-06-05 2014-08-20 昆山电子羽电业制品有限公司 一种切边冲孔的模具
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JP6314926B2 (ja) * 2015-07-21 2018-04-25 マツダ株式会社 プレス加工装置
JP6874534B2 (ja) * 2016-06-03 2021-05-19 日本製鉄株式会社 プレス成形品の製造方法及びプレス装置
JP6256571B1 (ja) * 2016-11-01 2018-01-10 マツダ株式会社 プレス加工装置
MX2019004639A (es) * 2016-11-01 2019-09-18 Unipres Corp Aparato de conformado por prensado en caliente y método de conformado por prensado en caliente.
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CN108372235B (zh) * 2018-02-12 2020-11-13 南京星乔威泰克汽车零部件有限公司 一种马氏体钢成形切边全自动热冲压模具及成形方法

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CN111344080A (zh) 2020-06-26
JPWO2020035915A1 (ja) 2020-08-20
WO2020035915A1 (ja) 2020-02-20
JP6651057B1 (ja) 2020-02-19
MX2020009201A (es) 2020-10-08

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