1. Touch inspection
Wipe the surface of the auto stamping part with a clean gauze. The inspector needs to wear touch gloves and touch the surface of the stamping part along the longitudinal direction of the stamping part. This inspection method depends on the experience of the inspector. If necessary, the detected suspicious area can be polished with a whetstone and verified, but this method can be regarded as an effective rapid inspection method.
2. Oiling inspection
Wipe the surface of the auto stamping part with a clean gauze. Then use a clean brush to apply oil evenly to the entire outer surface of the stamping in the same direction. Put the oiled stamping parts under strong light for inspection. It is recommended to erect the stamping parts on the body position. With this method, tiny pits, slumps, and ripples on stamping parts can be easily found.
3. Grinding of flexible gauze
Wipe the surface of the auto stamping part with a clean gauze. Use a flexible sand mesh to close to the surface of the stamping part and grind it to the entire surface in the longitudinal direction, and any pitting and indentation will be easily found.
4. Whetstone grinding
- (1) First wipe the surface of the stamping parts with a clean gauze, then use a whetstone (20×20×100mm or larger) for grinding, and use a relatively small whetstone to polish the places with arcs and hard-to-reach places (Example: 8×100mm semi-circular whetstone)
- (2) The choice of whetstone particle size depends on the surface condition (such as roughness, galvanizing, etc.). Fine-grained Whetstone is recommended. The direction of whetstone grinding is basically carried out in the longitudinal direction, and it fits well with the surface of the stamping parts, and some special places can also supplement the horizontal grinding.
5. Visual inspection
Visual inspection is mainly used to find abnormal appearance of automobile stamping parts: it is mainly manifested in the appearance of imprinting, scratches, missing processes, etc., which is not much different from the three points.
6. Inspection tool
Put the stamping parts into the product-specific inspection tool, and test the automobile stamping parts according to the operation requirements of the inspection tool manual, mainly to check whether the position of the product is consistent with the physical assembly
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