Whether the protective layer of the parts is damaged: Generally, manufacturers will coat a protective layer on the surface of automobile stamping parts when they leave the factory. Our common ones are piston pins, and the bearing bushes are protected by paraffin, but the cylinder liner and piston ring will be Apply anti-rust oil on the surface and wrap it with special paper for packaging. For example, piston valves must be soaked in anti-rust oil in advance, and then packed in plastic bags. If we find that the sealing sleeve is broken or the wrapping paper is damaged, and the paraffin and anti-rust oil are not in good condition, we should immediately apply for a return and exchange with the manufacturer.
Whether the rotating parts are flexible: When we purchase automotive stamping parts such as oil pumps and other rotating parts, we should first rotate the lower pump shaft by hand to see if it is flexible. When purchasing rolling bearings, we must first Support the inner ring of the bearing with one hand, and rotate the outer ring with the other hand. If the outer ring can rotate freely and quickly, and then stop slowly, it means that there is no problem. If the inflexibility is found during the rotation, it must be that the parts are deformed or corroded inside, and they must not be purchased.
Inspection of the whole part: Since it is called the whole part, it must be that all parts are complete, because only in this way can normal operation and complete assembly in the early stage be guaranteed. Because there will inevitably be individual small parts in the whole part, but if the small parts are left due to our negligence in inspection, it will cause the whole part to fail to work and be scrapped.
Generally, when we choose the material of automobile stamping parts, we must first consider the characteristics and application scope of the stamping type, and choose metal materials with different mechanical properties according to different situations. Only in this way can we effectively guarantee the quality of the product. On the other hand, it can also effectively save the use of materials.
Generally, when we buy materials for automobile stamping parts, the normal situation is to pay attention to the following points:
1. The first thing to consider is whether the material we choose has good economic performance.
Second, when purchasing materials for automotive stamping parts, you should first see if they can meet the performance requirements of common automotive parts on the market.
Third, the material selected by our country must have special technological properties.
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No matter what your metal fabrication needs are, Pintejin can offer the right solution: from single sheet metal part or sub-assembly of stamped metal parts to turnkey solutions for mechanical and electrical assemblies. We have the technology, equipment and the experience to fabricate customised metal products from aluminium sheet metal fabrication, steel, zinc plated steel, stainless steel sheet metal fabrication, brass and copper. Designs that require CNC machining of surfaces or components can be accommodated. We can supply polished, galvanized, zinc coated or powder coated finishes for any sheet metal work or stamped metal components. Coupled with our accurate and reliable metal fabricating equipment, we guarantee precision and repeatability in custom sheet metal work. You’ll be taking advantage of the best sheet metal fabrication china can produce.