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在工具制造中,有些工件需要控制螺纹的齿顶宽度。例如在螺纹环规制造中,加工大径沟槽用的专用丝锥,其螺纹的齿顶宽度A就需严加控制,见图1。虽然工具显徽镜可直接测量齿顶宽度,但必须将其换算成直径方向的数值才能使用。而用三针量法得到的恰是直径方向的数值,它能直接向操作者提供砂轮所应进刀的数据。再加上三针量法本身具有轻便、
In toolmaking, some workpieces need to control the thread crest width. For example, in the manufacture of thread ring gauges, the use of special taps for the machining of large-diameter grooves requires a tight control of the thread width A on the threads, as shown in FIG. 1. Although the tool can be directly emblem Hui mirror measuring tooth top width, but it must be converted into diameter values can be used. With the three-pin method is exactly the value of the diameter direction, it can provide the operator directly to the wheel should feed the data. Coupled with the three-pin method itself has a light,