Press product forming method

A technology of stamping parts and stamping forming, which is applied in the field of stamping parts forming, can solve the problems of flange part wrinkle forming, defects, etc., and achieve the effect of suppressing folds or fold overlapping

Active Publication Date: 2013-09-11
TOPRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the case of a bent stamped part that is curved in a plan view or a side view, there is a problem of forming defects such as wrinkles on the flange due to excess material due to the bent shape.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0041] Such as figure 1 As shown, the curved stamping part 1 of the first embodiment is formed into a cross-sectional hat shape by the following parts: the top part 3 is arranged on the upper side and extends in the longitudinal direction L; The widthwise end edge 3a of the face portion 3 extends obliquely downward (direction intersecting with the top face portion 3); Curved and extended toward the left and right sides.

[0042] Further, the widthwise end edge 3a of the top surface portion 3 is formed along the longitudinal direction L, and is formed in an arc shape that curves upward UPR to protrude in a side view.

[0043] The method for forming a press part according to the present embodiment includes a preliminary forming step, a final forming step, and a flange portion flattening step.

[0044] Preparatory forming steps such as figure 2 Shown in (a) and (b) are the steps of forming the high rigidity portion 9 extending along the longitudinal direction L on both sides ...

Embodiment

[0049] Next, the procedure of forming the bent press part of the first embodiment using a die will be described in detail in comparison with a comparative example.

[0050] Such as image 3 As shown, the mold 21 is composed of an upper mold 23 and a lower mold 25 . The upper mold 23 is composed of a mounting plate 27 and an upper molding die 29 provided under the mounting plate 27 . The upper molding die 29 is formed in a U-shape in a front view, and has a pair of left and right upper molding parts 31 extending downward, and a connecting part 32 bridging the upper molding parts 31 and 31. constitute. In addition, the lower die 25 is composed of a mounting plate 33 and a lower molding die 35 provided on the upper side of the mounting plate 33 . The lower forming die 35 is formed in a T-shape in front view, and is composed of flange forming portions 36 on both sides in the left and right direction, and a lower forming portion 37 protruding upward from a central portion in the...

no. 2 Embodiment approach

[0061] Next, the second embodiment will be described, but the same components as those in the first embodiment will be denoted by the same reference numerals, and description thereof will be omitted.

[0062] In the curved stamped part 1 of the first embodiment, the widthwise end edge 3a of the top surface portion 3 is formed along the longitudinal direction L in a side view and is formed in an arc shape that is curved upward UPR to protrude.

[0063] However, the curved press part 51 of the second embodiment, such as Figure 8 As shown in (a), the curved inner widthwise end edge 53a and the curved outer widthwise end edge 53b of the top surface portion 53 are curved in an arc shape along the longitudinal direction L in plan view. in addition, Figure 8 The cross-sectional shape shown in (b) is the same as that of the first embodiment. figure 1 (b) In the same shape, the top surface portion 53 , the side wall portion 55 and the flange portion 57 form a cap shape. In additio...

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PUM

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Abstract

Provided is a press product forming method which, even under the circumstance of press-forming a curved press product, can inhibit occurring of poor forming such as wrinkles or wrinkle overlap on flange portions. The curved press product is formed into a hat-like cross-section including an upper surface portion, side wall portions, and flange portions. The press product forming method includes: a pre-forming step of forming, at a widthwise end portion of a flat plate-like blank, at least one bending portion extending along a longitudinal direction; and a main forming step of forming the upper surface portion and the side wall portions under a state in which the bending portion is left.

Description

technical field [0001] The invention relates to a forming method of stamping parts. Background technique [0002] Conventionally, there is known a technology (for example, refer to Patent Document 1) of stamping a stamped part that is bent and extended from a top surface portion to a direction perpendicular to the top surface portion from an end edge in the width direction of the top surface portion. The side wall portion and the flange portion bent from the end edge of the side wall portion and extending along the top portion form a cross-sectional hat shape. In this patent document 1, an example of a shaped pillar (Bpillar) is shown. [0003] Background technical literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2010-36217 [0006] However, in the case of a bent press part that is curved in a plan view or a side view, there is a problem that forming defects such as wrinkles in the flange part are likely to occur due to exces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/26
CPCB21D11/20B21D22/02
Inventor 小笠原健一
Owner TOPRE
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