What are the steps and basic processes of automobile sheet metal parts processing?

2020-03-13 16:13:51

Why stainless steel is not used for automobile sheet metal parts?

At present, the sheet metal materials used in automobile are basically cold-rolled galvanized steel sheet, which has been stamping for many times, which requires that the materials must have good ductility and shape fixing ability, while the ductility and shape fixing ability of stainless steel is relatively poor, and the stamping plasticity is not good, so it is difficult to meet the process requirements of multiple stamping and complex forming.

The basic process of sheet metal processing is divided into: blanking, bending, stretching, forming and welding. In these five basic processes, each process should pay attention to the strict requirements of the process, and should not be careless at all. A slight deviation in one process will affect the quality of sheet metal processing products.

1、 Blanking. Cutting processing methods include general punching, digital punching, cutting by shearing machine, laser cutting and wind cutting. Among them, digital punching and laser cutting are the main ways of sheet metal cutting.

2、 Bend. There are many factors to be considered in bending, such as the small bending radius of the bending part, the height of the straight edge of the bending part, the distance between the holes on the bending part, the process incision of the local bending, the bending edge with beveled edge should avoid the deformation area, the design requirements of the dead edge, the process positioning hole added in the design, and the relevant dimensions of the bending part, the processability and the rebound of the bending part should be considered.

3、 Stretch. During drawing, it is necessary to calculate various data, including the requirements for the fillet radius between the bottom of the drawing part and the straight wall, the fillet radius between the flange and the wall of the drawing part, the diameter of the inner cavity of the circular drawing part, the fillet radius between the adjacent arms of the rectangular drawing part, the relationship between the height and the diameter of the circular flangeless drawing part during one-time forming, the dimension standards and precautions on the drawing of the drawing part Xiang et al.

4、 Forming. After forming the sheet metal products, some processing should be done to the products. There are stiffener structure, limit size of punch distance and flange distance, manufacture of louver and inner control flanging.

5、 Welding. This is the last process of the automobile sheet metal parts processing process, but also pay attention to the welding method and process technology. Welding methods include arc welding, electroslag welding, gas welding, plasma arc welding, fusion welding, pressure welding and brazing. Arc welding and gas welding are the main methods of sheet metal processing.

The four important steps of sheet metal processing are cutting, punching / cutting, folding and welding.

Sheet metal is sometimes used as sheet metal. The word comes from English plate metal. Generally, some sheet metal is pressed by hand or die to produce plastic deformation, to form the desired shape and size, and further to form more complex parts through welding or a small amount of machining, such as chimneys commonly used in families, tin furnaces, and automobile shells are sheet metal parts.

Sheet metal processing is called sheet metal processing. For example, the use of plates to make chimneys, iron buckets, oil tanks, ventilation pipes, elbows, Tianyuan places, funnel-shaped, etc. the main process of automotive stamping parts is cutting, bending and edge buckle, bending and forming, welding, riveting, etc., which requires certain geometric knowledge.

Sheet metal parts are sheet metal parts, which can be processed by stamping, bending, stretching and other means. A general definition is the parts with constant thickness in the process of processing. The corresponding parts are casting parts, forging parts, machining parts, etc. for example, the iron shell outside the car is sheet metal parts, and some cabinets made of stainless steel are sheet metal parts.