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Preform, hydroforming method, and hydroformed product

A preform, hydroforming technology, applied in the superstructure sub-assembly, cantilever mounted on the pivot, the superstructure, etc., can solve the problems of stable strength and quality of hydroformed products and excellent difficulties.

Inactive Publication Date: 2006-04-05
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the manufacturing method has a problem that it is rather difficult to reliably form reinforcing ribs and keep the strength quality of the hydroformed product stable and excellent at the same time

Method used

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  • Preform, hydroforming method, and hydroformed product
  • Preform, hydroforming method, and hydroformed product
  • Preform, hydroforming method, and hydroformed product

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0092] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0093] figure 1 is a perspective view to aid in the description of the hydroformed article according to Example A1; figure 2 It is a top view, and the auxiliary description is applied figure 1 Automobile parts of hydroformed products shown.

[0094] The hydroformed product 60 has outer surfaces 61, 62 forming a hollow structure and reinforcing ribs 63, 64, and is applied to automotive parts requiring light weight and high rigidity, such as side members or beam members of suspension parts 65. The hydroformed article 60 can also be applied to a pillar part, an axle part, or a vehicle body side part.

[0095] The outer surfaces 61, 62 have side walls 61A, 62A inclined relative to the overlapping surface OS and top end portions 61B, 62B surrounded by the side walls 61A, 62A. The reinforcing ribs 63, 64 divide the hollow cross-sections of the outer surfaces 61, 62...

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Abstract

The invention provides a pre-molding body, which has edges which are overlapped and jointed with each other. The invention also includes a first external component and a second external component used for forming the outer surface of the hydraulic-pressure molded product; and a reinforcing component, which is jointed to the first external component and the second external component so as to form reinforcing ribs. The reinforcing ribs partitions the hollow cross section of the outer surface. The reinforcing component has such sizes which can restrain the stretch along the tensile force direction; the stretch is due to the tensile force produced during the hydraulic-pressure molding.

Description

technical field [0001] The present invention relates to preforms, methods of hydroforming, and hydroformed articles. Background technique [0002] Typical automotive body structural members, such as side sill members, have a hollow structure to improve the absorption capacity of collision shocks, and the hollow structure is provided with internal reinforcement members to enhance its strength, which is used as a typical hydraulic pressure for car body structural members Shaped articles are produced by supplying hydraulic pressure to the inside of a preform having two outer members and a reinforcing member (for example, see Japanese Nos. 2003-320960 and 2004-82142) to expand and deform it. Pending Patent Application Bulletin). Contents of the invention [0003] However, the reinforcement ribs are formed by the linear expansion of the reinforcement member without any inflow of matter, unlike the case of the outer member, so that the chances of the reinforcement member breaki...

Claims

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Application Information

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IPC IPC(8): B21C37/15B21D26/02B21D26/021B21D26/023B21D26/059B21D53/88B60G7/00B62D25/00
Inventor 上野和人三田村一広真岛聪原冈孝吉留正朗金房英人
Owner NISSAN MOTOR CO LTD
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