What are the outstanding skills and functions of sheet metal in automobile maintenance?

2019-11-19 11:41:14

In automobile maintenance, sheet metal workers are using sheet metal and various types of materials to process different shapes of metal components through sheet metal processing skills. Automobile sheet metal components are widely used in automobile manufacturing and automobile repair. In addition, the automobile cover parts are mostly made of sheet metal, which is easy to be corroded and damaged, so sheet metal work plays an extremely important role in the automobile repair industry. As a good sheet metal worker, it is necessary to know all kinds of metal materials used for automobile sheet metal, mechanical functions of various materials, lofting, turning over and blanking knowledge of sheet metal, and how to use materials reasonably to ensure the quality and power of sheet metal work.

In modern times, automobile sheet metal parts are not only one of the most important transportation things in industry, agriculture and even all walks of life, but also one of the most important activities in human daily life. In the process of using, the automobile usually works in the extremely bad environment, heavy load, high speed, high vibration, high dust, and often in the sun and rain, the working temperature is very different, so the automobile sheet metal parts are sheet metal cover parts, which put forward a more serious request.

Because the automobile is often in high-speed, heavy load and repeated vibration condition in the work, it is necessary for the automobile sheet metal parts to have the strength, suitable hardness, excellent endurance and excellent anti fatigue function to ensure that the automobile does not deform or damage in the normal work, so as to meet the needs of transportation.

In automobile manufacturing and repair, the shape of many sheet metal structures is very complex. In order to prevent the difficulty of sheet metal work, it is necessary to appeal for sheet metal materials to have excellent skills and functions, namely:

(1) it is necessary for sheet metal materials to have excellent pressure processing function to ensure the smooth forming of sheet metal parts, that is, excellent plasticity. It is necessary to have the ability of enduring deformation without damage under the action of external force. For cold work parts, excellent cold plasticity is required, such as stamping parts of automobile parts; for hot work parts, excellent thermal plasticity is required, such as hot forging spring steel plate, hot riveting rivet, etc.

(2) excellent weldability. Many automobile sheet metal parts are welded together by spot welding, oxygen welding, arc welding or gas shielded welding, so it is necessary to appeal for excellent welding function of sheet metal parts. This is especially important in the repair of automobile. The materials with good weldability have high welding strength and little cracking tendency.

Most of the automobile cover parts work in the open air, often touching with water and steam, especially like muffler, often working under high temperature and corrosive gas. Therefore, it is necessary for sheet metal parts to have excellent chemical stability. It not only appeals to be corrosion-resistant and rust proof at room temperature, but also appeals not to be corroded and deformed under high temperature or sun exposure.

The scale accuracy and internal quality of sheet metal have great influence on sheet metal processing, especially on the molded parts. The detailed request is:

(1) the plate has high scale accuracy, uniform thickness and no deformation.

(2) the surface is flat, with high finish, and free of bubble, shrinkage cavity, scratch, crack and other defects.

(3) no serious rust, oxide skin and other attachments.

(4) the crystal structure and hardness have no obvious difference.