The characteristics of automobile covering parts include three aspects:
1, process characteristics
(1) the stamping process is mainly depended on the practice experience and data accumulation. The stamping process of automobile panels is mainly produced by long-term accumulation of production practice experience and accumulated data.
(2) the stamping process is a complex process. Because of the large size and complex shape, the cover is difficult to locate and move. As a result, the cover member is more complex to use, while the progressive die is rarely used.
(3) the basic process of punching, covering the forming process, trimming and punching process of flanging and shaping process.
(4) a press with a large working table and a relatively small nominal pressure. To suppress the press of automobile covering parts is generally the work surface is larger, in order to adapt to the relatively large size of the structure. Commonly used for closed four point mechanical press.
2, structural characteristics
(1), large size: the car is a large industrial products consumer goods. Automobile panel is a part that covers the engine and the chassis. The size of the structure depends on the size of the body.
(2), sheet thin: in order to reduce the car weight, covering parts of the plate are relatively thin.
(3) complex shape: in order to meet the needs of functional and aesthetic, automotive panels are generally composed of three-dimensional regular surface and irregular surface combination of composite surface. ,
(4) the expression of the model: as a result of the covering part is a solid surface, it is very difficult to fully express the shape and size of the automobile panel with mechanical drawing.
3, quality characteristics
(1), the size of high precision: when the connection is a curved surface. Natural smooth transition. After the covering piece is overlapped with the covering piece, the two overlapping surface is a surface which is mutually bonded without gap. The body should be a piece of Arts and crafts for people to enjoy.
(2) the surface quality is strict: the automobile covering part directly reflects the appearance quality of the automobile.
(3) rigid structure: whether it is the cab of a truck or the body of a passenger car, and the covering parts of the passenger car should have enough rigidity. In particular, no beam structure of the body parts, their strength and rigidity. Lack of rigidity, not only will cause the deformation of the whole body, but also make the car travel to produce noise.
(4) processing technology is good: good process mainly refers to the feasibility of a stamping molding. The manufacturing process of automobile panel is more complicated. Stamping die is quite expensive.
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