What is automobile sheet metal? Do you know

2019-10-11 11:42:50

Automobile sheet metal is a technical means of automobile repair. In this respect, automobile sheet metal is equal to automobile sheet metal repair. It means that automobile body should be repaired after collision, that is, all the work except anti-corrosion and decoration spraying. For example, automobile body damage analysis, automobile body measurement, automobile body sheet metal shaping, stretch correction, stress relief welding, automobile body accessories assembly, adjustment and so on.

Auto sheet metal is a processing method of automobile maintenance, also called cold work, that is to say, direct point, if the body appearance is damaged and deformed, it needs the process of sheet metal. The automobile crash repair has developed from the original "smash-pull welding repair" to the second manufacturing assembly of the automobile body. The repair of vehicles in collision accidents is no longer a simple knocking of sheet metal, and the quality of repair can not be observed by naked eyes alone. Maintenance personnel should not only understand the technical parameters and size of the body, but also master the material characteristics of the body, transfer the deformation trend and stress points of the body, and the production process of the body, such as welding technology. On the basis of mastering these knowledge, maintenance personnel also need to use advanced measuring tools, through accurate three-dimensional measurement of the body, to judge the direct and indirect damage and deformation of the body, as well as the hidden dangers due to the body deformation, to formulate a complete body repair program, and then with the correct maintenance technology and accurate three-dimensional dimension data of the key points of the body, the body will be measured. The key points are restored to the original position and the damaged body is restored to the state when it leaves the factory.

In automobile manufacturing and maintenance, the shape of many automobile sheet metal parts is very complex. To avoid the difficulty of sheet metal, sheet metal materials must have good technological performance requirements, that is:

Sheet metal materials must have good plasticity. It should have the ability to produce permanent deformation without being destroyed under the action of external forces. For cold-working parts, good cold plasticity is needed, such as stamping parts of automobile parts; for hot-working parts, good thermoplasticity is needed, such as hot forging spring leaf, hot rivet, etc.

Good solderability. Many automobile sheet metal parts are welded together by spot welding, oxygen welding, arc welding or gas shielded welding, so it is required that sheet metal parts have good welding performance. This is especially important in automobile repair and repair. The materials with good weldability have high welding strength and low cracking tendency.

3. Low price, economical and practical. For any component of automobile, economy should be taken into account when working conditions are satisfied. Nonferrous metals are not used for ferrous metals; precious metals are never used for nonferrous metals. The life of automotive sheet metal components should be compatible with that of other automotive components.

4. Good chemical stability. Most Automotive Panels Work in the open air environment, often in contact with water and steam, especially mufflers, often at higher temperatures and corrosive gases. This requires that sheet metal parts must have good chemical stability, which requires not only corrosion resistance and strong rust resistance at room temperature, but also not corrosion and deformation under high temperature or sun exposure.

5. Good dimensional accuracy and internal quality of sheet metal. The dimension accuracy and inherent quality of sheet metal have a great impact on sheet metal processing, especially on die parts.