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Segmented hydraulic forming subframe

A hydroforming and subframe technology, which is applied to vehicle parts, substructures, transportation and packaging, etc., can solve the problems of high processing cost, large processing equipment for one-piece hydroforming subframes, and difficult material supply, etc. The effect of improving flexibility

Inactive Publication Date: 2010-02-17
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The one-piece hydroformed subframe has some limitations. For example, the bulging blank of the one-piece hydroformed subframe is long and is a circular tube with equal wall thickness. The material is not easy to flow in from both ends for replenishment, resulting in the central part of the subframe The material thinning is serious in some places where the features are excessive; the processing equipment for the one-piece hydroforming subframe is large, and the processing cost is high; if the installation hard point of the body changes, or the subframe interferes with the chassis parts, the modification cost of the subframe is extremely high

Method used

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Experimental program
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Embodiment Construction

[0017] Concrete implementation steps of the present invention are as follows:

[0018] like Figure 1 to Figure 4 As shown, according to the layout of the body and chassis, the sub-frame is designed, and the sub-frame is divided into five sections: front cross member (3), left longitudinal member (1), right longitudinal member (5), left connecting pipe (2) and Right connection tube (4).

[0019] Through CAE analysis, the thickness and material of each pipe fitting are determined so that the sub-frame meets the strength requirements.

[0020] Design and process hydraulic bulging molds.

[0021] Separately form the pipe fittings of each section of the subframe.

[0022] The pipe diameters at the two ends of the left connecting pipe (2) and the right connecting pipe (4) are expanded to cover the front beam (3), the left longitudinal beam (1) and the right longitudinal beam (5), and an opening is set at the expanded pipe diameter. Plug the welding groove (6), assemble the subf...

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Abstract

The invention relates to a segmented hydraulic forming subframe formed by welding five segments of hydraulic forming pipe fittings. The subframe comprises a left longitudinal beam (1), a left connecting pipe (2), a front crossbeam (3), a right connecting pipe (4) and a right longitudinal beam (5). The five segments of pipe fittings are all hydraulically formed, and both ends of each connecting pipe are respectively overlapped and soldered with each crossbeam and each longitudinal beam. Compared with an integral hydraulic forming subframe, the segmented hydraulic forming subframe has small forming equipment, convenient processing, good material flowability in forming, reduction rate decrease and cost saving due to only partial part and mould are changed in design change.

Description

technical field [0001] The invention relates to the field of automobile manufacturing, in particular to a segmented hydroforming auxiliary frame. Background technique [0002] The sub-frame of the automobile generally adopts the stamping and forming structure of the steel plate and welds it, see Figure 5 . Many foreign automobile companies have gradually adopted the hydroformed sub-frame with the front beam and side beams integrated, see Image 6 . Compared with stamping forming, the hydroforming subframe can reduce the weight by more than 50%; the material utilization rate is high; the welding process is reduced, and the upper and lower bodies of the subframe are not welded, which improves the assembly efficiency. [0003] The one-piece hydroformed subframe has some limitations. For example, the bulging blank of the one-piece hydroformed subframe is long and is a circular tube with equal wall thickness. The material is not easy to flow in from both ends for replenishment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D21/02
Inventor 芮玉龙王正中吴泽勋
Owner CHERY AUTOMOBILE CO LTD