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近年来,在机械加工厂里流传着一道考核高级车工的理论与实际操作水平的试题。加工零件是孔板(图1)和柱板(图2),其材料均为HT150。试题的要求如下: (1) 利用普通车床,在孔板上加工三个φ20H7的圆孔,在柱板上加工三个φ20f6的圆柱,使柱板上的三个圆柱与孔板上的三个圆孔在任意方位均能正确配合。 (2) 允许被考核者设计、制造简易工装,并在加工时使用。 (3) 加工时,允许在孔板和柱板上作出必要的工
In recent years, in the mechanical processing plant circulating a test of advanced turner theory and practical level of the test. The machined parts are orifice plates (Figure 1) and column plates (Figure 2), all of which are made of HT150. The requirements of the test questions are as follows: (1) The use of ordinary lathe, the hole in the processing of three φ20H7 round hole in the cylinder plate processing three φ20f6 cylinder so that the column on the cylinder and the orifice on the three Hole in any direction can be the correct match. (2) Allowing the examinees to design and manufacture simple tooling and use them during processing. (3) When processing, it is allowed to make the necessary work on the orifice plate and cylinder plate