How to test the quality of hardware precision stamping parts
Stamping is one of the most internal processing methods used in hardware processing. Hardware precision stamping refers to the Mold for steel or non-ferrous metal plates under the premise of room temperature, which is formed into a specified pattern by the pressure required for processing by a press. How do Lamo hardware stamping manufacturers inspect the quality of hardware precision stamping parts? Let me share with you below.
Regarding the processing of hardware precision stamping parts, first of all, we must control the quality of the raw materials. The inspection time can be divided into the material acceptance and material washing before the inspection and inspection before the production and after the material. Next, the forming stamping parts can be inspected through the following five inspection techniques.
Hardware precision stamping parts
1. Touch detection
Wipe clean the surface of the outer cage cover with 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 skill depends on the inspector’s experience. If necessary, oilstone can be used to polish the detected suspicious area and verify it, but this technique can be regarded as an effective rapid detection technique.
2. Whetstone polishing
- 1. First, wipe the surface of the outer cage cover with clean gauze, and then use oil stone for polishing, and use smaller oil stone for arc-shaped and hard-to-reach places.
- 2. The selection of the whetstone particle size depends on the surface condition. It is recommended to use fine-grained oilstone. The direction of whetstone polishing is basically along the longitudinal direction, and it fits the surface of the stamping parts very well, and the lateral polishing can also be supplemented in a one-sided area.
- 3. Polishing of flexible gauze
Wipe clean the surface of the outer cage cover with 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.
4. oil testing
Wipe clean the surface of the outer cage cover with clean gauze. Then use a clean brush to apply oil evenly to the entire surface of the stamping part 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 body. With this method, small pits, pits, and ripples on the stamping parts can be found very easily.
Visual inspection is mainly used to find abnormal appearance and macro defects of stamping parts.
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