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1·Generally the punching machine can become Angle, processing the wear silk hole should do a special tooling.

一般打孔机都不能变角度，加工此穿丝孔需做一个专用工装。

2·Through the design special tooling realize parts wear silk hole processing;

通过设计专用工装实现零件穿丝孔的加工；

3·In general drilling, axes decline and diameter enlarged of the hole are the main problems to affect the precision of machine tooling.

麻花钻普通钻削中，孔轴线的偏斜和孔径的扩大是影响其加工精度的主要问题。

4·During machine manufacture, difference hole milling tool needs to be equiped with difference cylindrical tooling shaft.

在机械制造中，使用不同孔径的铣刀就需配不同外圆的刀杆。

5·Usually the hole-based system is used, as the results in a reduction in the variety of drill, reamer, broach and gauge tooling required.

通常使用的是基孔 制，因为这会减少所需要的钻头、铰刀、拉刀和计量工具的种类。