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Formed article for vehicle body structural member

A technology for formed products and car bodies, which is applied to vehicle components, superstructure sub-assemblies, superstructures, etc., can solve the problems of reduced dimensional accuracy and difficulty in obtaining shapes, and achieve the effect of reducing residual stress and improving dimensional accuracy.

Inactive Publication Date: 2009-10-28
TOYOTA JIDOSHA KK
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When a "high-tensile steel sheet" having a higher tensile strength than ordinary steel sheets is used, problems such as a decrease in dimensional accuracy generated after formation become serious, and when a so-called "ultra-high-tensile steel sheet" with a higher tensile strength than a high-tensile steel sheet is used When using "steel plate", this problem becomes more serious and it becomes difficult to obtain the desired shape

Method used

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  • Formed article for vehicle body structural member
  • Formed article for vehicle body structural member
  • Formed article for vehicle body structural member

Examples

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Embodiment Construction

[0037] FIG. 1 shows the structure of a molded article 10 for a vehicle body member according to a first embodiment of the present invention in a perspective view. FIG. 2 shows a plan view of a molded product 10 for a body member. FIG. 3 shows a side view of the molded article 10 for a vehicle body member when viewed from the arrow L side in FIG. 2 . FIG. 4 shows a side view of the molded product 10 for a vehicle body member when viewed from the arrow R side in FIG. 2 , that is, from the opposite side compared to the case of FIG. 3 .

[0038] As shown in these figures, the molded product 10 for a vehicle body member includes a top wall portion 11 that can be regarded as a gradation portion forming wall. The top wall portion 11 includes a lower flat portion 12 in a flat shape. A top wall transition portion 13 , which may be regarded as a first transition portion, continuously extends from one end of the lower flat portion 12 relative to the longitudinal direction of the top wa...

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Abstract

A formed article (10) for a vehicle body structural member includes: a first gradually varying portion (13) that is curved around an axis extending in a width direction of a top wall portion (11)and the width of the top wall portion (11) varies; and a second gradually varying portion (21, 26) in which the width of a leg wall portion (19) varies so as to cancel the variation in the width of the top wall portion (11) in the first gradually varying portion (13). The shape of a gradually-varying-portion ridge (14, 16) that is a boundary between the first gradually varying portion (13) and the second gradually varying portion (21, 26) is made substantially the same both in a plan view that is viewed along the thickness direction of the top wall portion and in a side view that is viewed along the width direction of the top wall portion.

Description

technical field [0001] The present invention relates to a formed product of a body member for a vehicle body part, and more particularly to a formed product of a body member made of a steel plate (high-tensile steel plate) or A steel sheet (ultra high-tensile steel sheet) having a higher tensile strength than the high-tensile steel sheet is formed. Background technique [0002] For example, Japanese Patent Application Publication No. 2006-281312 (JP-A-2006-281312) discloses a roof rail outer reinforcement provided along the top side of the vehicle body and a center pillar provided along the center pillar. A vehicle body member of an upper reinforcement or a center pillar lower reinforcement formed to have a hat-shaped cross-section opened toward one side in a vehicle transverse direction. A body member having this structure is formed by drawing (pressing) a flat steel plate. [0003] In recent years, a so-called "high-tensile steel sheet" having a tensile strength higher t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D25/04C21D7/00
CPCB62D25/06B62D25/04C21D7/00
Inventor 宫下敏也
Owner TOYOTA JIDOSHA KK
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