What's our principle when we buy automobile stamping parts?

2021-07-06 09:17:40

Whether the protective layer of parts is damaged: when the automobile stamping parts are delivered, the general manufacturer will apply a protective layer on its surface. We usually have piston pins, and the bearing shells are protected by paraffin. However, the cylinder liner and piston ring will be coated with rust proof oil and wrapped with special paper for packaging. For example, piston valves must be soaked in rust proof oil in advance, Then wrap in plastic bags. If we find that the sealing sleeve is broken or the packing paper is damaged and paraffin and rust proof oil are not in good condition, we should apply for return and replacement with the manufacturer immediately.

Whether the rotating parts are flexible: when we choose the rotating parts such as the oil pump for stamping parts of automobile, we should first turn the pump shaft by hand. It is not flexible. When choosing rolling bearing, we should first support the inner ring of the bearing with one hand and the other hand to rotate the outer ring. If the outer ring can rotate freely and quickly, Then I will stop slowly, which means it is OK. If the inflexible situation is found during the rotation, it must be that the parts are deformed or rusted inside, and they must not be purchased.

Inspection of the whole part: since the whole part is called, it must be that all parts are complete, because only in this way can normal operation and complete assembly in the early stage be ensured. Because there are some small parts in the whole part, but if the small parts are left due to our negligence, it will cause the whole part to be unable to work and be scrapped.

When we choose the stamping parts, we should first consider the characteristics and the scope of stamping. According to different situations, we should choose metal materials with different mechanical properties. Only in this way can we effectively guarantee the quality of the products on the one hand, and on the other hand, we can effectively save the use of materials.

Generally, when we buy stamping parts, we should pay attention to the following points in normal situations:

1、 First of all, we should consider whether the materials we choose have good economic performance.

2、 Secondly, when purchasing stamping parts, it should be first to see whether it can meet the requirements of the common performance of automobile parts in the market.

3、 And it is the material that our country chooses must have special technological properties.