When grinding the workpiece shown in Figure 1, the right end hole needs to be positioned with the left end hole. The mountain can be seen from the figure, the coaxiality tolerance between the holes at both ends is φ0.012mm, and the tolerance of the positioning hole is 0.021mm. Obviously, the general mandrel positioning method can not guarantee the processing requirements of the workpiece. To this end, we have designed the one shown in Figure 2.
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