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Analysis of the problem of screw quality and its cause analysis
1. The head of the screw is crooked. The reason is that the first punch of the screw mold is not properly installed and the machine is adjusted incorrectly.
2. The head of the screw is not round. The reason is the improper selection of the first punch of the screw mold or the insufficient filling of the first punch.
3. The screws have burrs or burrs. The reason is that the first punch is poorly formed, which is mainly caused by the excessive gap between the punch and the die hole or the short punch. (Guide: Torque wrench for high-strength bolt construction)
4. The screw head is cracked, and the screw head has cracks. The reason may be that the quality of the screw wire itself is defective, so before the screw wire is headed, it must be inspected by the quality department and tapped with a lotion. Especially the stainless steel screw wire, it is necessary to check that the one is stainless steel 201 and the other is stainless steel 304. It may also be due to the wrong use of a die (such as a die with a hexagonal washer head for the pan head), and the viscosity of the lubricating oil.
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Contact Person: Steven Yan
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One-stop manufacturer for all kind of stamping products and CNC lathed products.