Cold stamping process method for oil tank bracket of heavy vehicle

Abstract

The invention discloses a cold stamping process method for an oil tank bracket of a heavy vehicle. The cold stamping process method comprises the following steps of: 1) blanking; 2) preforming; 3) forming; 4) punching; and 5) punching, wherein the blanking in the step 1) comprises: forming the appearance of a blank; the preforming in the step 2) comprises: changing an included angle between two arms of the blank between 120 and 130 degrees to form a part, and performing one-step molding on the section of the part and pressing in place; and the forming in the step 3) comprises: performing angle forming on arc and linear transition areas of the part, so that the included angle between the two arms is finally in a 90-degree state of the product. The phenomenon that a part of the part is cracked in the punching process is avoided, and the yield of the finished product is greatly improved; and meanwhile, according to the test, the thinning over-proof potential hidden danger is completely eliminated.

Description

technical field [0001] The invention relates to a cold stamping process method of a heavy-duty vehicle fuel tank bracket. Background technique [0002] The shape of the fuel tank bracket for heavy-duty vehicles is an overall L-beam type, which is one of the more complicated beam-type parts of thick plates. It uses high-strength steel plates, and the cross-section The deformation section is not equal and the forming depth is large, and the forming depth in the middle arc area is the largest; the two ends are formed by large arcs; the angle between the two straight arms is 90° (such as Figure 1-Figure 3 shown). [0003] In addition to the radial tensile stress in the arc region and its own bending tensile stress in the forming of the bracket, the key is the additional tensile stress generated along the straight arm to both ends, which has reached a large value, which affects the forming stability of the workpiece . [0004] Due to the unique forming depth, variable cross s...

AI Technical Summary

Problems solved by technology

[0007] The outstanding defect of the original process is in Figure 4 Where shown, there is cracking or thinning out of tolerance

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