Selection of screw taps

发布时间：

2022-06-30

Although the method of cutting internal threads (nuts) is generally performed by lathe cutting or tapping with screws, screw tapping is almost always used in cases of small diameter and mass production.

Foreword

Most of the tapping operations are close to the final processing procedure, so once the tapping is broken, the gong hole is enlarged or reduced, and the teeth are cracked, etc., it will cause many bad products to suffer a lot of damage.

In recent years, with the progress of automatic and high-speed mechanical play, tapping machines have also used excellent machines equipped with guide and knife feeding machines. On the other hand, the material to be cut tends to be more and more difficult to cut, and the cutting conditions are usually single-shot, which has become more stringent.

Tapping is to first tap the thread with the lower hole drilled by the drill bit, which is to cut in a very narrow space and discharge the chips. The flow of chips varies depending on the material being cut, so it is ideal to use a tap that has been developed successfully according to the application.

The characteristics of the screw tap, its correct use, and the countermeasures when it occurs are explained in the following order.

1. Selection of screw taps

1-1 Name of each part of the screw tap (Figure 1)

螺丝攻各部的名称