Automobile panels have complex shapes and require high surface quality. To process high-quality stamping parts with the least mold cost and the least equipment, it is necessary to prepare a reasonable and lean process plan, which has high requirements for the operating level of the craftsmen.

Classification of covers

Classified by function and location, it can be divided into three categories: external covering parts, internal covering parts and skeleton covering parts. There are special requirements for the appearance quality of external cladding and skeleton cladding, and the shape of internal cladding is often more complex.

According to the technical characteristics, they are classified as follows:

(1) A cover that is symmetrical to a plane. Such as hood, dash panel, rear panel, radiator cover and radiator cover etc. This kind of cover can be further divided into those with shallow depth and concave curved shape, those with uniform depth and complex shape, those with large depth difference and complex shape, and those with deep depth.

(2) Asymmetrical cover. Such as the inner and outer panels of the car door, fenders, side panels, etc. This kind of cover can be divided into shallow and relatively flat, uniform in depth and complex in shape, and deep in depth.

(3) A cover that can be double stamped. The so-called double stamping means that the left and right parts form a closed part that is easy to form by one person, and it also refers to a semi-closed cover that becomes two parts after being cut.

(4) Covering parts with a flange plane. For example, the inner panel of a car door, the flange surface can be directly selected as the binder surface.

(5) Covering parts that are pressed and formed. The process schemes of the above types of covering parts are different, and the mold The design structure is also very different.