Method and die for molding backseat side cover plate of automobile

Abstract

The invention discloses a method and a die for molding a backseat side cover plate of an automobile. The method for molding the backseat side cover plate of the automobile comprises the following steps of: blanking and making a blank; performing drawing forming, namely performing primary drawing and secondary forming, wherein the primary drawing is used for the initial molding of a convex hull and the molding of a plate part of the backseat side cover plate, and the secondary drawing is used for the final molding of the convex hull; trimming and punching; and flanging, and performing hole flanging. The die for molding the backseat side cover plate of the automobile is used for primary drawing in the method for molding the backseat side cover plate of the automobile, and comprises an upper die holder, a lower die holder, an upper die, a lower die, a lower die support, a positioning block and an elastic device. According to the method and the die for molding the backseat side cover plate of the automobile, the die and a molded curved surface of the plate part of the blank of the backseat side cover plate are matched to resist the relatively large internal stress generated by a convex hull structure in the drawing process, so that the blank of the backseat side cover plate is reliably positioned, the positioning failure which is caused by the relative motion of the blank of the backseat side cover plate and the die can be effectively prevented, and the molding quality is ensured; and the product has high structural strength, and can meet the requirements of fatigue strength of vehicle bodies.

Description

technical field [0001] The invention relates to a method for manufacturing auto parts and a mould, in particular to a method for forming an automobile rear seat side cover and a mould. Background technique [0002] The rear seat side cover is a body part installed at the bottom of the rear seat of the car. It needs to meet the fatigue strength requirements of the car body. It is one of the load-bearing points of the car body and affects the safety and comfort of the car. The rear seat side cover is generally left and right The two symmetrical ones are both irregularly curved panel structures with convex hulls formed by integral drawing of metal plates. In the prior art, the manufacture of the rear seat side cover usually requires blanking, drawing forming, and trimming. Punching and flanging and flanging, among which blanking is used to process the blank of flat structure, and drawing forming is used for forming the curved surface of the blank. Drawing forming includes prima...

AI Technical Summary

Problems solved by technology

[0002] The rear seat side cover is a body part installed at the bottom of the rear seat of the car. It needs to meet the fatigue strength requirements of the car body. It is one of the load-bearing points of the car body and affects the safety and comfort of the car. The rear seat side cover is generally left and right The two symmetrical ones are both irregularly curved panel structures with convex hulls formed by integral drawing of metal plates. In the prior art, the manufacture of the rear seat side cover usually requires blanking, drawing forming, and trimming. Punching and flanging and flanging, among which blanking is used to process the blank of flat structure, and drawing forming is used for forming the curved surface of the blank. Drawing forming includes primary drawing and secondary drawing, and primary drawing is convex hull The primary forming, the second drawing is for the forming of the plate and the completion of the convex hull forming. The disadvantage is that it is difficult to position the billet of the flat structure during the first drawing, and the large internal stress generated during the drawing process of the convex hull structure easily leads to the positioning of the blank. Ineffectiveness causes relative sliding between the blank and the mold, wrinkling of the workpiece after processing, poor surface quality, easy to form more stress concentration points and cracks, local damage and fracture, unable to meet the fatigue strength requirements of the car body

Images