During the use of stamping dies, in order to ensure the safe use of quality, we can confirm through a series of tests.
1. Whetstone polishing
1) First, wipe the surface of the outer cover with a clean gauze, and then polish with oilstone (20×20×100mm or larger), and polish with relatively small oilstone for areas with arcs and places that are difficult to reach. (For example: 8×100mm semi-circular whetstone).
2) The choice of the whetstone particle size depends on the surface condition (such as roughness, galvanizing, etc.). It is recommended to use fine-grained oilstone. The direction of whetstone polishing is basically along the longitudinal direction, and it fits well on the surface of the stamping parts, and some special places can also be supplemented with horizontal polishing.
2. Touch inspection
Clean the surface of the outer cover with a clean gauze. The inspector needs to wear touch gloves to 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, 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.
3. Visual inspection
Visual inspection is mainly used to find abnormal appearance and macro defects of stamping parts.
4. Oiling inspection
Clean the surface of the outer cover 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 that the stamping parts be erected on the car body. This method can easily find tiny pits, pits, and ripples on the stamping parts.
5. Inspection tool inspection
Put the stamping parts into the inspection tool, and inspect the stamping parts according to the operating requirements of the inspection tool manual.
6. Polishing of flexible gauze
Clean the surface of the outer cover with a clean gauze. Use a flexible sand net to close the surface of the stamping part and grind it to the entire surface in the longitudinal direction. Any pitting or indentation will be easily found.
