WO2016194503A1 - プレス成形方法及びプレス成形金型 - Google Patents

プレス成形方法及びプレス成形金型 Download PDF

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Publication number
WO2016194503A1
WO2016194503A1 PCT/JP2016/062469 JP2016062469W WO2016194503A1 WO 2016194503 A1 WO2016194503 A1 WO 2016194503A1 JP 2016062469 W JP2016062469 W JP 2016062469W WO 2016194503 A1 WO2016194503 A1 WO 2016194503A1
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WO
WIPO (PCT)
Prior art keywords
press
die
punch
inclined wall
wall portion
Prior art date
Application number
PCT/JP2016/062469
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
遼 揚場
亮伸 石渡
平本　治郎
Original Assignee
Ｊｆｅスチール株式会社
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 Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to KR1020177033929A priority Critical patent/KR102003631B1/ko
Priority to CN201680030671.XA priority patent/CN107635684B/zh
Priority to MX2017015331A priority patent/MX2017015331A/es
Publication of WO2016194503A1 publication Critical patent/WO2016194503A1/ja

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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
    • B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
    • 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
    • B21D22/21—Deep-drawing without fixing the border of the blank

Definitions

  • the present invention relates to a press forming method and a press molding tool, and in particular, a press molding method and a press mold that suppress wrinkles from occurring in a crash forming. About.
  • Patent Document 1 discloses a method for manufacturing an L-shaped product by press working. According to this method, wrinkles are generated in the upper wall of the L-shaped product and fracture in stretch flange forming by pressing using a wrinkle holding pad (pad). It is said that it can be avoided.
  • Patent Document 2 discloses a method of manufacturing a part having an arc-shaped part at a corner without causing wrinkles on a side wall.
  • the method includes: a step of producing an intermediate molded part (preformed part) that does not mold the arc-shaped part; and a step of drawing the arc-shaped part from the intermediate molded product produced by the process to complete the corner part. Therefore, it is said that wrinkles can be avoided by making one or more notches starting from the edge side of the flange portion in a portion that does not reach the arcuate portion.
  • Patent Document 3 a metal sheet material is bent into a hat-shaped cross section, and immediately after the bending process is completed, a compressive force is applied to the vertical wall portion of the metal plate material.
  • a press mold (tool of press forming) is disclosed.
  • a pad load is applied in advance to a wrinkle-generating portion by using a wrinkle pressing pad mechanism having a power different from that of a press forming machine.
  • a method for preventing buckling of the blank material due to the surplus material can be applied to the upper surface of a part that can be sandwiched between a punch and a pad at the initial stage of press molding, but the inclination angle with respect to the drive direction (press molding direction) of the press machine. It cannot be applied to the inclined wall portion.
  • the manufacturing method of the L-shaped product by press work described in Patent Document 1 is to press the blank material with the punch and the pad and maintain the height of the pad as it is, so that the upper wall curved portion (arched portion) of the L-shaped product It suppresses wrinkles in the vicinity.
  • this method can suppress only wrinkles generated on the upper wall of the product and cannot be applied to suppress wrinkles generated on the inclined wall portion of the press-formed product.
  • Patent Document 2 has difficulty in productivity because at least two steps are required for manufacturing parts. Further, in the method described in Patent Document 2, since it is necessary to make an incision in the blank material, there is a problem that the shape of the product is significantly different from the original product shape.
  • the die is lifted laterally by a suspended slider attached to the upper die so as to be slidable.
  • the upper half of the vertical wall portion of the molded product is sandwiched and pressed against the lower half to compress the vertical wall portion.
  • the curvature of the slanted wall portion changes in the bending process. Therefore, the shape of the upper bending blade of the press die must be changed in accordance with the curvature of curvature in the bending process.
  • the press die described in Patent Document 3 the shape of the upper bending blade cannot be changed in the bending process. Therefore, the press die described in Patent Document 3 cannot manufacture a press-formed product having a slanted wall portion that curves in a convex shape.
  • the present invention has been made in view of the above, and has a top portion and an inclined wall portion having no flange at the end continuously on at least one side of the top portion.
  • press molding of a press-molded product in which the whole or a part of the press-curved product is curved convexly toward the inclined wall in the longitudinal direction of the press-molded product in plan view, the blank material is not cut, and It is an object of the present invention to provide a press molding method and a press mold that can form a wall portion in one step and can suppress the generation of wrinkles in the inclined wall portion.
  • the press molding method according to the present invention includes a top plate portion, and an inclined wall portion having no flange at the tip continuously on at least one side of the top plate portion, and the whole or a part of the inclined wall portion is a flat surface.
  • a press molding method in which a press-molded product that is convexly curved toward the inclined wall portion side in the longitudinal direction of the press-molded product is formed by a concave die and a convex punch, wherein the die shoulder portion of the die The first step of forming the foam by moving the die relative to the punch side in a state where the shoulder portion is in contact with the portion corresponding to the inclined wall portion of the blank material, and the inclined wall portion of the blank material A second step of sandwiching a portion closer to the end than the portion corresponding to the die with the die and the punch, and forming the die on the punch side in a state where the end portion is sandwiched. move relative to dead center) And a third step of forming the inclined wall portion.
  • the press molding method according to the present invention is characterized in that, in the above invention, at least the first step includes a step of pressing a portion corresponding to the top plate portion of the blank material with a pad.
  • the press-molding die according to the present invention has a top plate portion, and an inclined wall portion having no flange at the tip continuously to at least one side of the top plate portion, and the whole or a part of the inclined wall portion is A press-molding die for molding a press-molded product that is convexly curved toward the inclined wall portion in the longitudinal direction of the press-molded product in plan view, wherein a blank material is placed on the top plate portion to form the top plate portion.
  • a punch having a plate forming part, a slant wall forming part for forming the slant wall part, and a punch side locking part (locking portion) continuous from the slant wall forming part, and in cooperation with the slant wall forming part of the punch
  • a die having a slanted wall forming part for forming a slanted wall part of the press-formed product and a die side latching part continuous from the slanted wall molded part, and the punch side latching part and the die side latching
  • Each part is a parallel wall parallel to the press molding direction, and the bra Characterized in that it is sandwiched configured to be able to part of the end portion than the portion corresponding to the inclined wall portion in the click member.
  • the press-molding die according to the present invention is characterized in that, in the above-mentioned invention, a pad for pressing at least a part of a portion corresponding to the top plate portion of the blank material in cooperation with the punch is provided.
  • the top plate portion, the slant wall portion having no flange at the tip continuously to at least one side of the top plate portion, and the whole slant wall portion Alternatively, in press molding of a press-molded product that is partially convexly curved toward the inclined wall portion in the longitudinal direction of the press-molded product in plan view, the blank material is not cut and the inclined wall portion is It can shape
  • FIG. 1 is an explanatory view of a press mold according to an embodiment of the present invention.
  • FIG. 2 is a perspective view of a press-formed product according to the present invention.
  • FIG. 3 is an explanatory view of a conventional press-molding die.
  • FIG. 4 is a diagram for explaining a problem of a press-formed product formed by using a conventional press-molding die.
  • FIG. 5 is an explanatory view for explaining the press molding method according to the embodiment of the present invention.
  • FIG. 6 is a perspective view of a press-formed product as a target in the embodiment.
  • FIG. 7 is a perspective view of the press-molding die of the present invention used in the examples.
  • FIG. 8 is a diagram showing a molding process in the case where molding is performed using the press mold of the example of the present invention.
  • FIG. 9 is a perspective view of a press-formed product formed by using the press-molding die of the example of the present invention in Examples.
  • FIG. 10 is a perspective view of a blank material formed using a conventional press-molding die in the examples.
  • the press molding method includes a top plate portion 43 and a slant wall portion 45 having a flange at the tip continuously to at least one side of the top plate portion 43.
  • the press molded product 41 in which the entire or part of the inclined wall portion 45 is convexly curved toward the inclined wall portion 45 in plan view along the longitudinal direction of the press molded product 41 is converted into a convex punch and a concave die. It shape
  • the press mold used in the press molding method there is a press mold 1 as shown in FIG.
  • the press-formed product 41 that is the target shape of the press-molding in the present embodiment includes a top plate portion 43 and a slant wall portion that has no flange at the tip continuously to at least one side of the top plate portion 43. 45, and the whole or part of the inclined wall portion 45 is curved in a convex shape toward the inclined wall portion 45 in a plan view along the longitudinal direction of the press-formed product 41.
  • the inclined wall portion 45 continues to the top plate portion 43 via the connecting portion 47, and is inclined with respect to a direction (press forming direction) in which the die 5 is relatively moved to the punch 3 side when the press-formed product 41 is formed. ⁇ .
  • the press-molding die 1 includes a top plate forming portion 3 a on which a blank material 9 is placed and forming the top plate portion 43, and an inclined wall that forms the inclined wall portion 45.
  • a punch 3 having a punching side hook 3c continuous from the forming portion 3b and the inclined wall forming portion 3b, and the inclined wall portion 45 of the press-formed product 41 is formed in cooperation with the inclined wall forming portion 3b of the punch 3.
  • a die 5 having a die side latching portion 5c continuous from the inclined wall forming portion 5b and the inclined wall forming portion 5b.
  • the punch side latching part 3c and the die side latching part 5c are parallel walls parallel to the press molding direction (drive direction of the press), respectively, and the slant wall part in the blank material before molding bottom dead center. It is comprised so that the site
  • the clearance between the punch side latching portion 3c and the die side latching portion 5c is approximately equal to the thickness of the blank material 9, so that the portion corresponding to the inclined wall portion 45 in the blank material 9 during the molding. Further, the punch side latching portion 3c and the die side latching portion 5c can hold the portion closer to the end side in cooperation. In addition, by pressing to the bottom dead center while sandwiching the portion on the end portion side, it is possible to obtain a press-formed product 41 having a target shape in which generation of wrinkles in the inclined wall portion 45 is suppressed.
  • the press molding method according to the present embodiment is, for example, a molding using a press molding die 1 as shown in FIG. 1, and a first step in which a die 5 is moved relative to the punch 3 side to form a mold. And a second step of sandwiching a portion closer to the end portion than the portion corresponding to the inclined wall portion 45 in the blank 9, and further forming the die 5 on the punch 3 side while sandwiching the end portion portion. And a third step of forming the inclined wall portion 45 of the press-formed product 41 by relative movement to the dead point.
  • each said step is demonstrated in detail with reference to FIG.
  • First step In the first step, the blank material 9 is placed on the top plate forming portion 3 a of the punch 3, and the die 5 (for example, a die shoulder portion) is in contact with a portion corresponding to the inclined wall portion 45 in the blank material 9.
  • the die 5 for example, a die shoulder portion
  • the blank material 9 does not come into contact with the slant wall forming portion 3b of the punch 3 and deflection occurs as shown in FIG. 5 (b). .
  • This deflection becomes large when a steel plate having a high tensile strength is used as the blank material 9, and is particularly noticeable when a high strength steel plate having a tensile strength of 980 MPa class (class) or higher is used.
  • ⁇ Second step ⁇ In the second step, before the molding bottom dead center after the first step of forming the foam, a part closer to the end part than the part corresponding to the inclined wall part 45 in the blank material 9 is formed on the punch side latching part 3c and the die. This is a step in which the side latching portion 5c cooperates and holds (FIG. 5C). As described above, since the blank material 9 is bent in the first step, the blank material 9 does not come into contact with the slant wall forming portion 3b of the punch 3 and the end portion of the blank material 9 is hung on the punch side. It is clamped by the stop part 3c and the die side hook part 5c.
  • ⁇ Third step ⁇ In the third step, the die 5 is further moved relative to the punch 3 side to the bottom dead center in the state where the end side portion of the blank 9 is sandwiched by the punch side latching portion 3c and the die side latching portion 5c. In this step, the target shape of the press-formed product 41 is obtained (FIG. 5D).
  • the deflection generated in the blank material 9 is buckled in the thickness direction.
  • the blank material 9 is pressed by the inclined wall forming portion 5b of the die 5 and the inclined wall forming portion 3b of the punch 3 to form the inclined wall portion 45 (FIG. 2).
  • the wrinkles 49 are formed from the vicinity of the tip of the inclined wall portion 45 as shown in FIG. It may occur.
  • the wrinkle 49 is generated when a large compressive strain is generated in the forming process and the end portion of the blank 9 that is not restrained by the surrounding material is buckled in the thickness direction. Therefore, immediately before the end portion of the blank 9 is buckled in the thickness direction in the forming process, the off-plane deformation in the thickness direction of the end portion is constrained, thereby causing wrinkles in the inclined wall portion 45. It is thought that generation of 49 can be suppressed.
  • the punch 3 and the die 5 each have a punch side hook portion 3 c and a die side hook portion 5 c which are parallel walls parallel to the press molding direction. There is.
  • the portion on the end side of the blank 9 sandwiched between the punch side latching portion 3c and the die side latching portion 5c can be easily removed by the next process such as wrist-like or trimming.
  • the press-formed product 41 is not provided with the pad 7. May be formed.
  • the die 5 is preferably provided with a top plate forming portion (not shown) for forming the top plate portion 43 of the press-formed product 41.
  • the press molding die 1 includes the pad 7, and at least in the first step, the upper surface of the blank material 9 is pressed by the pad 7 for molding.
  • the position in the press molding direction of the part closer to the end part than the part to be performed is not changed, and the part on the end part side is surely secured at the predetermined position by the punch side latching part 3c and the die side latching part 5c in the second step. This is because it is sandwiched between the two.
  • the press molding method according to the present embodiment is not limited to using the punch side latching portion 3c and the die side latching portion 5c, but from a portion corresponding to the inclined wall portion 45 in the blank material 9 during the molding.
  • the portion on the end side can be sandwiched between the punch 3 and the die 5, other modes may be used.
  • a part of the punch 3 or the die 5 corresponding to the punch side latching part 3c or the die side latching part 5c may be moved in the middle of molding to sandwich the end of the blank material 9 in the middle of molding. Good.
  • FIG. 6 it has a top plate portion 43 and a slant wall portion 45 continuous on one side of the top plate portion 43, and the whole or a part of the slant wall portion 45 is a press-molded product.
  • the presence or absence of wrinkles generated in the inclined wall portion 45 of the press-formed product 41 was verified with respect to the press-formed product 41 curved in a convex shape toward the inclined wall portion 45 in plan view along the longitudinal direction of 41.
  • the dimensions of the press-formed product 41 are as follows.
  • the punch shoulder radius R of the connecting portion 47 connecting the top plate portion 43 and the inclined wall portion 45 is 7 mm, and the inclined angle ⁇ between the inclined wall portion 45 and the height direction of the press-formed product 41 is ⁇ .
  • the radius of curvature of the convex curve of the inclined wall portion 45 is 1600 mm
  • the length L in the longitudinal direction is 830 mm
  • the inclined length S of the inclined wall portion 45 is changed in the range of 20 mm to 40 mm.
  • the blank 9 used for forming the press-formed product 41 was a steel plate having a thickness of 1.2 mm and a tensile strength of 980 MPa.
  • a press-molded product 41 is molded using each of the press-molding die 21 (invention example) according to the present invention shown in FIG. 7 and the conventional press-molding die 11 (conventional example) shown in FIG. In each case, the inclination length S of the inclined wall portion 45 was changed to determine the presence or absence of wrinkles.
  • the press mold 21 in the present invention includes a punch 23 having a top plate forming part 23a, a slant wall forming part 23b, and a punch side latching part 23c, a die side latching part 25c, A die 25 having a slant wall forming portion 25b, and the positions of the punch side latching portion 23c and the die side latching portion 25c are the end portions in the range of about 1 mm from the tip of the blank 9. It changed according to the inclination length S of the inclined wall part 45 so that it might be clamped.
  • the press molding die 21 according to the present invention When the press molding die 21 according to the present invention is used (example of the present invention), the press molding die 21 and the blank material 9 in the molding process are molded to the bottom dead center in FIG.
  • the shape of the molded product 41 is shown in FIG.
  • FIG. 10 shows the results of the shapes of the press-molding die 11 and the blank material 9 in the molding process when the conventional-shaped press-molding die 11 is used (conventional example).
  • Table 1 shows the results of the presence or absence of wrinkles when the slope length S of the inclined wall portion 45 is changed.
  • produces in the edge part of the inclined wall part 45 after press molding is shown by (circle)
  • produce is shown by (circle).
  • the inclined wall portion 45 when the inclined length S of the inclined wall portion 45 is 35 mm or more, the inclined wall portion 45 is wrinkled. As shown in FIG. 10, until the middle of molding, the blank material 9 could be molded without causing wrinkles in the portion corresponding to the inclined wall portion 45, but the blank material 9 was bent near the bottom dead center of the molding. Wrinkles occurred in the process of pressing between the inclined wall forming portion 13b and the inclined wall forming portion 15b of the die 15.
  • the inclined wall portion 45 in the middle of the molding, by sandwiching a portion closer to the end portion than the portion corresponding to the inclined wall portion 45 in the blank material 9 (A in FIG. 8C), the inclined wall portion 45 Even when the inclined length S is 40 mm, the inclined wall portion 45 can be molded without generating wrinkles, which is a better result than the conventional example.
  • the present invention there is a top plate portion and an inclined wall portion without a flange at the tip continuously on at least one side of the top plate portion, and the whole or a part of the inclined wall portion is a press-formed product in a plan view.
  • the inclined wall portion can be formed in one step without making a notch in the blank material. It is possible to provide a press molding method and a press mold that can suppress the generation of wrinkles in the inclined wall portion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
PCT/JP2016/062469 2015-06-02 2016-04-20 プレス成形方法及びプレス成形金型 WO2016194503A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020177033929A KR102003631B1 (ko) 2015-06-02 2016-04-20 프레스 성형 방법 및 프레스 성형 금형
CN201680030671.XA CN107635684B (zh) 2015-06-02 2016-04-20 冲压成型方法及冲压成型模具
MX2017015331A MX2017015331A (es) 2015-06-02 2016-04-20 Metodo de moldeado por prensa y herramienta para moldeado por prensa.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015112321A JP6011680B1 (ja) 2015-06-02 2015-06-02 プレス成形方法及びプレス成形金型
JP2015-112321 2015-06-02

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WO2016194503A1 true WO2016194503A1 (ja) 2016-12-08

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JP (1) JP6011680B1 (zh)
KR (1) KR102003631B1 (zh)
CN (1) CN107635684B (zh)
MX (1) MX2017015331A (zh)
WO (1) WO2016194503A1 (zh)

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JP6973236B2 (ja) * 2018-03-29 2021-11-24 Ｊｆｅスチール株式会社 プレス成形方法
WO2020105647A1 (ja) * 2018-11-19 2020-05-28 日本製鉄株式会社 湾曲部材の製造方法
JP6919690B2 (ja) * 2018-12-06 2021-08-18 Ｊｆｅスチール株式会社 プレス部品の製造方法及び下金型の設計方法
JP2022049566A (ja) 2020-09-16 2022-03-29 東プレ株式会社 プレス成形品の製造方法および成形用金型

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JP5382281B1 (ja) * 2013-01-16 2014-01-08 新日鐵住金株式会社 プレス成形方法
JP2015027698A (ja) * 2013-06-27 2015-02-12 Ｊｆｅスチール株式会社 プレス成形方法及び装置

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JP2663701B2 (ja) * 1990-10-12 1997-10-15 日産自動車株式会社 プレス型
JPH0647135A (ja) 1992-07-30 1994-02-22 Sophia Co Ltd 遊技機
JP2005254279A (ja) 2004-03-11 2005-09-22 Toyota Auto Body Co Ltd プレス型
CN101745581B (zh) * 2008-11-29 2012-06-27 比亚迪股份有限公司 板料压弯成型模具及方法
CN102371309B (zh) * 2010-08-26 2013-07-31 哈尔滨建成集团有限公司 一种具有内凹侧壁的浅锥形件拉深成型复合模具
EP2644293B1 (en) * 2010-11-24 2016-07-27 Nippon Steel & Sumitomo Metal Corporation Method for manufacturing l-shaped product
CN203370953U (zh) * 2013-08-06 2014-01-01 崔奎强 一种拉深模具

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JP5382281B1 (ja) * 2013-01-16 2014-01-08 新日鐵住金株式会社 プレス成形方法
JP2015027698A (ja) * 2013-06-27 2015-02-12 Ｊｆｅスチール株式会社 プレス成形方法及び装置

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JP6011680B1 (ja) 2016-10-19
JP2016221558A (ja) 2016-12-28
KR102003631B1 (ko) 2019-07-24
KR20170139646A (ko) 2017-12-19
CN107635684B (zh) 2019-05-03
MX2017015331A (es) 2018-03-28
CN107635684A (zh) 2018-01-26

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