What is a car sheet metal piece, do you know?

Automotive sheet metal (Metal Plate; SheetMetal [in English) technology is an auto repair, this car is equal to the sheet metal automotive sheet metal repair, refers to the car after the collision to repair the body, all the work is in addition to the spraying work of anticorrosion and decoration on the body outside the rest. Such as vehicle body damage analysis, vehicle body measurement, car body sheet metal shaping, tensile correction, stress relief welding, and car body accessories assembly, adjustment and so on.

Automobile sheet metal is a processing method of automobile maintenance, also called cold, direct point, if the body appearance damage and deformation, it needs the sheet metal process. Car collision repair has been developed from the original "smash and pull welding" to the two manufacturing assembly of the body. Repair of vehicle collision accidents is no longer a simple car sheet metal hammering, repair quality can not rely solely on the human eye to observe the appearance of the vehicle, the gap. Maintenance personnel not only to understand the technical parameters and the size of the body, the body must grasp the material characteristics, characteristics of the force transfer body deformation trend and force and production process of the body such as welding etc.. Based on mastering this knowledge, maintenance personnel must use advanced measurement tools, through the three-dimensional measurement of vehicle accurate, direct and indirect damage to determine the body deformation, and because the body deformation of the existence of hidden dangers, formulate a complete body repair scheme, then combined with three dimensional data maintenance process correctly and accurately fit of each key point, the body of each key point, return to the original position of the damaged body restored to factory state.

The shape of many automotive sheet metal parts is very complex in automobile manufacturing and maintenance. In order to avoid the difficulties of sheet metal, sheet metal materials must have good technological performance requirements.

1 the sheet metal material must have good plasticity. The ability to produce permanent deformation and not be destroyed by external force. For cold working parts, they must have good cold plasticity, such as automobile parts stamping parts. For hot working parts, they must have good thermal plasticity, such as hot forging spring steel plate, hot rivet rivet and so on.

2 good weldability. Many automotive sheet metal parts are welded together by spot welding, oxygen welding, arc welding or gas shielded welding. Therefore, the sheet metal parts must have good welding performance. This is especially important in the automotive repairing maintenance, good welding materials for welding high strength, cracking tendency.

3 low price, economical and practical. For any component of a car, the economy should be taken into account when the working conditions are met. It can be used in black metal, not nonferrous metal; it can be used for nonferrous metals, and no precious metals. The life of the automobile sheet metal components should be adapted to the life of the other components of the car.

4 good chemical stability. Automotive panels are mostly working in open air, often contacting with water and steam, especially mufflers, often working at high temperatures and corrosive gases. This requires that the sheet metal parts must have good chemical stability, which requires corrosion resistance and strong rust resistance at room temperature, and requires no corrosion or deformation under high temperature or sun exposure.

5 the size accuracy and internal quality of the good sheet. The size accuracy and internal quality of the plate have a great impact on the sheet metal processing, especially for the moulded parts.