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在工具制造中,经常遇到如图1所示的零件。由于孔浅,用内径表无法测量孔径尺寸。做专用测量心轴不经济,既使有专用测量心轴,在加工过程中,当孔快到尺寸要求时,操作者心中无数,容易产生废品。以往我们是将L尺寸加大到用内径表能够测量的深度,当孔径加工到符合图纸要求,再切削端面,保证深度L,这样既费工又费料。为了提高经济效益,我们在游标卡尺上装了个杠杆
In the tool manufacturing, often encounter the parts shown in Figure 1. Due to the shallow hole, it is impossible to measure the aperture size with the ID meter. Do special measuring spindle is not economical, even if there is a special measuring spindle, in the process of processing, when the hole is approaching the size requirements, the operator countless hearts, prone to waste. In the past, we increased the L size to the depth that can be measured with the ID meter. When the aperture is machined to meet the requirements of drawings, the end surface is cut to ensure the depth L, which makes it both labor and expense. In order to improve economic efficiency, we put a lever on the vernier caliper