There are two main ways to solve the surface layer problem of automotive sheet metal parts

2022-07-25 17:00:44

Sheet metal parts refer to products processed by sheet metal technology. Sheet metal parts have been widely used in our daily life. Sheet metal parts have the characteristics of light weight, high strength, conductivity (can be used for electromagnetic shielding), low cost, good mass production performance and so on. When in use, the common problem is the corrosion of the outer surface.

There are two main ways to deal with the surface layer of sheet metal parts:

1. Clear processing.

The corrosion, dirt and oxide skin on the outer surface of steel plate and copper plate will affect the plate, and cracks, pores and so on may appear. So we need to clean the shape before connecting. Generally speaking, we can use acid washing method and mechanical method to deal with it.

2. Softening treatment.

In fact, it is to eliminate the residual stress during work hardening and production and restore the original plasticity, so we need to carry out softening treatment. Generally speaking, according to the requirements of softening, we can divide it into isothermal annealing, complete annealing, stress annealing and recrystallization annealing.

Automobile sheet metal is one of the main components of the automobile. The whole body in white is assembled by 400 ~ 500 stamping parts. In addition to its protective and aesthetic functions, sheet metal parts are also the main carrier for cars to withstand gas resistance. The quality and service life of sheet metal parts not only affect the appearance of the car, but also increase the resistance of air to the car due to quality and deformation, which will reduce the quality and performance of the whole car. Therefore, it is very important to ensure the quality of stamping parts. How to ensure the quality of stamping parts, we must first understand the common defects and their causes. This paper mainly introduces the common defects and causes of three types of stamping parts.