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Contact inspection

Use clean gauze to wipe the surface of the outer cover clean. The inspector needs to wear contact gloves to make contact with the outer surface of the stamping part along the longitudinal direction of the stamping part. This inspection method depends on the inspector’s experience. When necessary, oilstone can be used to polish the detected suspicious area and verify it, but this method can be regarded as an effective quick inspection method.

Whetstone polishing

  • 1. Clean the surface of the outer cover with clean gauze, and then use oilstone for polishing. Use relatively small oilstone for arcuate and hard-to-reach areas.
  • 2. The choice of whetstone particle size depends on the appearance. It is recommended to use fine-grained oilstone. The direction of whetstone grinding is basically in the longitudinal direction, and it fits well with the appearance of the stamping parts, and some special places can also compensate for the horizontal grinding.

Flexible gauze polishing

Use clean gauze to wipe the surface of the outer cover clean. Use a flexible sand net to close the surface of the stamping part and polish it to the entire surface in the longitudinal direction. Any pitting or indentation will be easily found.

Oiling inspection

Use clean gauze to wipe the surface of the outer cover clean. Then use a clean brush to apply oil evenly to the entire surface of the stamping in the same direction. Put the oiled stamping parts under strong light for inspection. It is recommended that the stamping parts be erected on the car body. This method can easily find tiny pits, pits, and ripples on the stamping parts.

Visual inspection

Visual inspection is mainly used to find the appearance abnormalities and macro defects of stamping parts.

 

 

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