A method for manufacturing a hot stamping part of a bare board patch

Abstract

The invention discloses a method for manufacturing a hot stamping part of a bare plate patch, which includes blanking an uncoated steel plate to obtain a main material and a patch material, and setting a corrosion-resistant The high-performance metal material is bonded together, and the bonded main sheet and the patch sheet are spot-welded and then heated and hot-stamped in sequence to obtain a hot-stamped part with a patch-reinforced structure. The manufacturing method provided by the invention can form a corrosion-resistant transition layer at the junction of the hot stamping parts main sheet and the patch sheet, and the method adopts uncoated steel plate as the production plate, which can solve the problem of electrophoresis in the electrophoresis process of uncoated steel. The liquid cannot penetrate the mating surface of the patch piece and the main part, resulting in no corrosion resistance problem. In addition, compared with the method of directly using coated steel sheets for hot stamping, this manufacturing method is easy to weld and saves raw material costs.

Description

technical field [0001] The invention relates to the field of hot stamping forming, in particular to a method for manufacturing hot stamping parts of bare board patches. Background technique [0002] Patch board hot stamping technology is a kind of steel plate with two different shapes and sizes (that is, the main material and the patch material) are welded and fixed, and then the overall heating, stamping and other processes are carried out, so as to obtain a patched plate. The hot forming technology of hot stamping parts, which can enhance the local strength of welded steel plate parts, is mainly used for parts that need local reinforcement, such as B-pillars, door sills, etc. The advantage of this technology is that the obtained hot stamping parts have good collision safety, the partial performance of the automobile body can be adjusted, and at the same time, the cost of tooling and molds in the manufacturing process of the automobile body can be reduced, and it is easy to...

AI Technical Summary

Problems solved by technology

[0003] The steel for manufacturing the above-mentioned hot stamping parts can generally be divided into uncoated bare steel plate or coated steel plate. The uncoated bare steel plate is selected as the hot stamping material of the patch material and the main material. During the electrophoresis process of the whole vehicle, the electrophoretic fluid cannot penetrate into the gap between the patch material and the main material, resulting in no corrosion resistance on the surface of the patch material and the main material, which greatly limits the bare steel plate as a patch Use of plate parts

In order to make up for the above defects, at present, automobile manufacturers generally choose coated steel plates as raw material patch plates to process hot stamping parts and then carry out electrophoresis on the whole vehicle with the car body, and because the price of coated steel plates (such as AlSi plates) is generally lower The plate is high, and the scraps punched from the coated steel plate generally cannot be recycled and reused, which greatly increases the cost of the parts, and the welding process between the coated plate and the coated plate is prone to weak welding and false welding. The two layers of coating materials flow unevenly, causing the solder joints to bear huge tearing force and crack and fall off