Touch test: wipe the surface of the outer cover with clean gauze. The inspector needs to wear touch gloves to touch along the longitudinal direction of the automobile stamping parts and close to the surface of the stamping parts. This inspection method depends on the inspector's experience. If necessary, polish the detected suspicious area with an oilstone and verify it, but this method is an effective and rapid inspection method.

Wipe the surface of the outer cover with clean gauze. Then use a clean brush to evenly oil the entire outer surface of the stamping parts in the same direction. Put the oiled metal stamping parts under strong light for inspection. It is recommended to put the stamping parts on the vehicle body. During the stamping process, metal stamping parts have good surface quality and smooth and beautiful appearance because the surface of the material is not damaged, which provides convenient conditions for surface painting, electroplating, phosphating and other surface treatment. With this method, it is easy to find tiny pits, pits and ripples on the metal stamping parts.

Special stamping enterprises. For example, the stamping of aviation parts belongs to this type of enterprise, but these craft factories are also classified into some large factories.

The automobile factory has 4 major processes (4 major workshops), namely the stamping workshop, welding workshop, painting workshop, and assembly workshop. Automobile stamping parts are produced in the stamping workshop. To give you an example, all the metal shells you see on the car shell are stamped parts. The basic principle is to use the steel plate as a designed and manufactured mold, and use a press according to the designed process (from 10 tons to 2000 tons) pressed into the required medium shape.

We all know that tires not only support the weight of the entire car body, but also absorb shocks and vibrations caused by uneven road surfaces during driving. The condition of tires directly affects the smooth driving, safety and fuel consumption of the car. If the tire is damaged during driving, such as a puncture or leakage caused by a foreign object puncturing the tire, not to mention the possible traffic accidents, it is enough to be unable to drive and delay on the road.

It is better not to ask for help to repair the car, this is the voice of many car owners. Because only if you truly love your car, you will not be black-handed by some black car repairers. There are some commonly used auto parts on the car, which require the owner to have certain maintenance skills, so as not to be able to calmly deal with emergencies.