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Method and apparatus for manufacturing press component

一种制造方法、制造装置的技术，应用在压制零部件的制造和制造装置领域，能够解决加厚、制造成本上升、弯曲零部件重量增加等问题

Active Publication Date: 2018-03-27
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to ensure the strength required for curved parts, the thickness of the blank 10 has to be increased, which inevitably increases the weight of the curved parts and increases the manufacturing cost.

Method used

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  • Method and apparatus for manufacturing press component
  • Method and apparatus for manufacturing press component
  • Method and apparatus for manufacturing press component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0216] By using computer-based finite element method for the use of figure 1 Manufacturing device 20 shown in the manufacturing figure 2 Shown intermediate parts 11-1 (example of the present invention), and use Figure 20 For the pressed part (comparative example) manufactured by the manufacturing device 14 shown, the maximum plate thickness reduction rate at the intersection point a of the concave ridge line 11d and the flange 11e at the circumferential center position of the bent portion 13 was analyzed. .

[0217] The specifications of the analyzed intermediate parts 11-1 and pressed parts are as listed below.

[0218] ·The tensile strength of blanks 24 and 18: above 1180MPa, plate thickness: 1.6mm

[0219] ・Height of intermediate parts 11-1 and pressed parts (projection distance of vertical wall 11c in the product height direction): 60mm

[0220] ・Curvature R of the concave ridge line 11d of the intermediate part 11-1 and the pressed part 1 : 20mm when viewed sidewa...

Embodiment 2

[0226] By using computer-based finite element method for the use of figure 1 Manufacturing device 20 shown in the manufacturing figure 2 Shown intermediate parts 11-1 (example of the present invention), and use Figure 20 For the pressed parts manufactured by the manufacturing apparatus 14 shown (comparative example), the maximum plate thickness reduction rate at the intersection point a of the concave ridge line 11d and the flange 11e at the circumferential center position of the bent portion 13 was analyzed.

[0227] Table 1 summarizes the specifications and results of the analyzed intermediate parts 11-1 and pressed parts.

[0228] [Table 1]

[0229]

[0230] In this analysis, the dynamic explicit algorithm using the finite element method was used to calculate, and in the billet 24 with a tensile strength of 980 MPa, it was judged that the maximum plate thickness reduction rate: 15% or more was not at the above-mentioned intersection point a. For cracks, in the bill...

Embodiment 3

[0233] By using computer-based finite element method for the use of figure 1 Manufacturing device 20 shown in the manufacturing Figure 12 The intermediate part 30 (example of the invention) of the T-shaped part shown, and Figure 13 In the intermediate part 31 of the Y-shaped part shown, the maximum plate thickness reduction rate at the intersection point a of the concave ridge line and the flange at the circumferential center position of the bent part was analyzed.

[0234] Table 2 summarizes the specifications and results of the analyzed intermediate components 30 and 31 . In addition, the opening angles in Table 2 refer to Figure 12 , 13 The angle θ in .

[0235] [Table 2]

[0236]

[0237] In this analysis, calculation was performed using a dynamic explicit algorithm using the finite element method, and in the case of a material strength of 1180 MPa, it was judged that there was no crack at the intersection point when the maximum plate thickness reduction rate w...

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Abstract

The purpose of the present invention is to carry out press working by a free bending method on a blank comprising an ultra high-strength steel plate and manufacture a press component without cracks ina flange on the inside peripheral side of a curved part. A press component 11 having a hat shaped cross-sectional shape and a curved part 13 is manufactured by carrying out cold press working on a blank 24 comprising an ultra high-strength steel plate with a tensile strength of 1080 MPa or higher by the free bending method disclosed in the pamphlet for International Publication No. 2011 / 145679. By means of press working, a material flow facilitating part 19 is disposed in the vicinity of the portion of the blank 24 to be formed into a flange 11e that is on the inside peripheral side of the curved part 13 of the press component 11, and the material flow facilitating part 19 increases the flow amount by which the portion of the blank 24 to be formed into an end part 11f of the press component 11 flows into the portion of the blank 24 to be formed into the flange 11e on the inside peripheral side of the curved part 13 of the press component 11.

Description

technical field [0001] The present invention relates to a manufacturing method and manufacturing apparatus for pressed parts. Background technique [0002] The body shell of a motor vehicle has a composite structure (load-bearing structure). Composite structures consist of many framing members and shaped panels joined together. [0003] For example, front struts, center struts, side sills, roof sills, side sills, etc. are known as skeletal members. In addition, for example, a cowl ridge (Japanese: フードリッジ), a cowl, a front floor, a rear floor front side panel, a rear floor rear side panel, etc. are known as shaped members. [0004] Assemble frame members with closed sections such as front pillars, center pillars, and side sills by joining constituent members such as front pillar reinforcements, center pillar reinforcements, and side sill outer reinforcements to other constituent members such as outer panels and inner panels . [0005] Figure 14 It is an explanatory diagr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/26B21D22/02B21D24/00B21D24/04
CPCB21D22/22B21D53/88B21D22/26B21D24/04B21D22/06
Inventor 斋藤雅宽西村隆一田中康治宫城隆司山本昂
Owner NIPPON STEEL CORP
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