Analysis of teeth loss at the tip of the thread rubbed by the thread rolling board above M6

Analysis of the reasons for the tooth loss and peeling caused by the analysis of the thread tip part of the thread rolling board above M6:
In the rolling process of the bare nails used for screws above M6, the tip of the tip must be squeezed from a straight polished rod into a tip of 50 degrees, which produces a large amount of excess residue, and the resulting residue is digested in two ways:
One: the discharge is discharged to generate residual material (commonly known as iron dung);
Second: squeeze into a tooth pattern at the tip;
The improvements are as follows:
1. For thread rolling boards above M6, the tip milling teeth are deeper than those of common specifications.
The mill is larger so that the excess material can be attached to the tip.
2. When feeding, the thread rolling board increases the discharge, so that the excess residual material will be discharged into iron dung.
The areas that the screw factory can improve are:
The length of light nails used in large-size screws is strictly controlled (shorter than ordinary small-size screws)