本丈不是讲丝锥在使用中发生的所有问题,而是仅就下列两个问题,根据本人工作实践中所碰到的,提供大家参考。 一、丝锥前角的选择 前角γ(图1)是根据加工材料的不同来选择的。根据文献的介绍,汇总列于表1。 由表列数字来看,加工钢和合金钢所采用的前角数值范围很大,因此,在具体 This chapter does not speak of all the problems that occur in the use of tap. Instead, it serves as a reference for only the following two questions, which I encountered in my own work. First, the choice of tap rake angle γ (Figure 1) is based on the processing of materials to choose from. According to the introduction of the literature, the summary is shown in Table 1. From the table number of view, the processing of steel and alloy steel used by a wide range of values, therefore, in specific