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Manufacturing method of frame

A manufacturing method and a technology for a vehicle frame, which are applied in the manufacturing field of the vehicle frame, can solve the problems of rising cost, disadvantageous weight reduction and the like, and achieve the effect of suppressing the reduction of plate thickness

Active Publication Date: 2022-07-26
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, upgrading of materials has become a major cause of cost increases, and reinforcement measures based on reinforcements or increased plate thickness are not conducive to weight reduction

Method used

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  • Manufacturing method of frame
  • Manufacturing method of frame
  • Manufacturing method of frame

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0062] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0063] figure 1 It is a figure which shows the frame of embodiment of this invention.

[0064] The vehicle body frame 10 is a frame member for a vehicle such as an automobile, and has a shape extending in a predetermined direction with a polygonal (consisting of a plurality of general planes) cross-sectional shape. The vehicle body frame 10 of the present embodiment is a press-molded product formed by press-molding a metal plate (steel plate), except for the plate portion 11 extending in a predetermined direction Y (hereinafter referred to as the longitudinal direction Y) and the portion extending from the plate portion 11 . In addition to the three general surfaces constituted by a pair of left and right side parts 12 and 13 extending downward from both ends of the left and right, a pair of flange parts 14 and 15 extending outward from the lower ends of the side part...

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PUM

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Abstract

The present invention provides a method of manufacturing a vehicle frame, which can easily impart plastic strain uniformly, and can achieve flattening while suppressing a reduction in the plate thickness of a portion to which plastic strain has been imparted. In the pre-straining step of imparting pre-strain to the frame (10), the following steps are performed: a first pressing step, in which a corrugated shape (21) is formed by pressing, and the corrugated shape (21) repeats waves along the arc. waveform, the height (H) of each wave is set to give a height equivalent to a pre-strain equivalent to half of the target plastic strain; and the second pressing step is to flatten the waveform shape (21) by press forming to make the given Pre-strain multiplier.

Description

technical field [0001] The present invention relates to a manufacturing method of a vehicle frame. Background technique [0002] For bending and compressive forces acting on the frame, if the target withstand load cannot be obtained, upgrade the material to a higher-strength material, or add reinforcements (patches or ribs), or increase the plate thickness and other measures (for example, refer to Patent Documents 1 and 2). However, the upgrading of materials is the main cause of the increase in cost, etc., and reinforcement measures based on the increase of reinforcement members and plate thicknesses are not conducive to weight reduction. [0003] On the other hand, as a technique for increasing the strength of a metal plate, a plastic deformation technique for refining crystals by shear deformation using trapezoidal grooves is disclosed (Non-Patent Document 1). Regarding the technology described in this Non-Patent Document 1, as Figure 14 As shown, the metal plate is su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D13/02B21D13/10B21D53/88C21D9/00C21D1/26B62D21/00
CPCB21D13/02B21D13/10B21D53/88C21D9/0068C21D1/26B62D21/00
Inventor 林诚次兴津贵隆泷川辉
Owner HONDA MOTOR CO LTD