Problems Occurred in the Process of Thread Moulding

1. There are cracks in the processing, in addition to the regulation issue, screw thread rolling dies plates exist errors.

2. When in burning process, the thread spacing is too large, the stop time is too early or too late.

3. Crooked tail or broken tail. The debugging machine is too tight or too loose, which is likely to cause the screw fastener, like blind rivet nuts surface defects.

4. Torsion bar or rough threads. It needs to check the distance of the screw thread rolling dies plates, whether it is in proper; or the correction problem.