Ultra-high tensile steel vehicle door anti-collision joist and method of manufacture

Abstract

The invention relates to a superhigh intensity steel vehicle door buffer beam. A beam body is an integrated component formed by a steel plate with a U-shaped cross section; the left part of the beam body is provided with a main positioning hole, the right part is provided with an auxiliary positioning hole; and the left end and the right end of the beam body are respectively provided with a weld faying surface. The invention is characterized in that the beam body is made of superhigh intensity steel with components: 0.11 percent of C, 0.2 percent of Si, 1.6 percent of Mn, less than or equal to 0.015 percent of P , less than or equal to 0.002 percent of S , 0.04 percent of Al and less than or equal to 0.015 percent of.Nb A manufacturing method of the superhigh intensity steel vehicle door buffer beam comprises the following steps that: 1. the forming and drawing are performed to obtain a primary model blank with a U-shaped cross section; 2. the trimming and punching are performed to obtain a beam body blank; 3. the edge is turned over and the shaping is performed to obtain a finished product. The superhigh intensity steel vehicle door buffer beam manufactured by the cold pressing forming method can effectively prevent or avoid the phenomena of cracking, twisting and rebounding deformation and guarantee the accuracy and intensity of the product.

Description

technical field [0001] The invention relates to auto parts and a manufacturing method thereof, in particular to an ultra-high-strength steel automobile door anti-collision beam and a manufacturing method thereof. Background technique [0002] As we all know, the anti-collision beam of the car door is one of the most important safety components of the car. It is very important for the safety protection of the occupants when the car has a side collision. Due to the high strength required, the selection of its material and molding process is very critical. Thermoforming materials and thermoforming processes are commonly used in many OEMs to manufacture automobile door anti-collision beams. The thermoforming process is generally: blanking → sheet coating → heating sheet → forming and cooling in the mold → sandblasting → laser cutting. Thermoforming materials mainly contain alloying elements such as manganese and boron to enhance their hardenability. The strength of the thermo...

AI Technical Summary

Problems solved by technology

Due to the use of thermoforming technology, the investment in equipment is large, and it is necessary to solve the problems of high temperature oxidation prevention and mold cooling system design, which is difficult to implement

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