Manufacturing process of automobile longitudinal bearing beam

Abstract

The invention discloses a manufacturing process of an automobile longitudinal bearing beam. The process comprises the following steps: (a) blanking; (b) removing oil and rust from the blanked material; (c) performing hot stamping forming on the clean material; (d) performing final punching and trimming on the formed piece; and (e) performing rust prevention treatment. The hot stamping is performed in a closed cavity filled with nitrogen; a plate is uniformly heated to 770-780 DEG C to form a uniform austenite structure and then is pressed by using a stamping die; then the temperature reduction process is quickly finished at a constant speed in the stamping die; and finally the automobile longitudinal bearing beam is in a uniform martensite structure. Through the invention, high strength can be realized as long as the wall thickness of the automobile longitudinal bearing beam is just 6 mm; the shortcomings of cold stamping, such as crack, excessive rebound and the like, are avoided; the automobile longitudinal bearing beam has high anti-collision level and is safe and reliable; the automobile becomes light, the automobile oil consumption is reduced, and CO2 discharge is reduced; and moreover, the generation of an oxidized layer on the automobile longitudinal bearing beam is avoided at a high temperature, and therefore regular cleaning of oxidized layers is not required.

Description

technical field [0001] The invention relates to a manufacturing process of auto parts, in particular to a manufacturing process of an automobile longitudinal bearing beam. Background technique [0002] In modern society, as our main means of transportation, the demand for automobiles is increasing, and the production volume is also increasing accordingly, so the production volume of auto parts is also increasing. Various sheet metal parts such as roof, car wall, car cover, roof side beams, suspension brackets, longitudinal load beams account for a large proportion of auto parts, and the manufacturing process of these sheet metal parts directly affects Its final strength, hardness, and the thickness of the selected sheet, etc., will have an impact on the overall quality of the car and consumables. [0003] The sheet metal parts in the prior art auto parts generally adopt the cold stamping manufacturing process. The cold stamping manufacturing process is easy to process and s...

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Problems solved by technology

[0004] In view of the above situation, the present invention provides a manufacturing process of the longitudinal load-bearing beam of the automobile. By adopting the method of hot stamping, the longitudinal load-bearing beam of the automobile caused by cold stamping is easy to crack, low in strength, low in anti-collision level, excessive springback, and affecting the The question of car safety

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