Process for manufacturing beams of vehicle with varied sections

Abstract

A technology for manufacturing the cross-section varied main beam of car includes such steps as providing a strip of steel plate with proper width and length, rolling to become U-shaped, punching to form a narrow end part and an inclined transition segment, and cutting off the excessive side. Its advantages are high productivity, low requirement to die and punching machine, and low cost.

Description

technical field [0001] The invention relates to a method for manufacturing an automobile girder, in particular to a process method for manufacturing an automobile variable-section girder. Background technique [0002] as attached figure 1 As shown, the beams of trucks are mostly variable-section beams, and their cross-sectional shapes are similar to channel steel, except that they are made of bent steel plates. The height of the beam at one end of the cab is narrowed, and the upper side of the narrower end It is connected with the upper side of the rear part of the girder through a slope transition. The existing domestic traditional equipment and production technology for processing automobile variable cross-section girders are stamped and formed by large-scale presses, which have disadvantages such as insufficient process performance, low output, inflexible length adjustment, slow product transformation, and difficulty in forming an assembly line; at the same time , can n...

AI Technical Summary

Problems solved by technology

The existing domestic traditional equipment and production technology for processing automobile variable cross-section girders are stamped and formed by large-scale presses, which have disadvantages such as insufficient process performance, low output, inflexible length adjustment, slow product transformation, and difficulty in forming an assembly line; at the same time , still cannot meet the needs of punching super long tonnage vehicle variable cross-section beams over 10 meters

[0003] as attached image 3 As shown, there is also a method for processing variable-section beams. The method is to first roll the strip steel plate into an equilateral channel steel (as attached figure 2 ), and then cut off the redundant material of the variable cross-section part, and then weld the transition part of the variable cross-section part and the side connected with the transition part to the corresponding position of the equilateral channel steel. Although this method overcomes the shortcomings of the aforementioned method , but the variable-section beam made by this method has poor mechanical properties, which is likely to cause stress concentration, short service life, and cause vehicle accidents

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