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二、定位孔和定位轴任意边随机接触在一批工件定位中,工件定位孔与定位心轴(或定位销)为任意边随机接触。图9所示工件安装在垂直放置的心轴上即属此种定位方式;用心轴定位在卧式铣床键槽时,虽然心轴为水平放置,但在心轴上装卸工件是在机床旁边的工作台上进行的,所以其工件定位孔和心轴仍为任意边随机接触。现仍以铣精密沟槽为例讨论此种定位方式下的△JW和△BC。
Second, the positioning hole and the positioning axis random contact random edge In a group of workpiece positioning, the workpiece positioning hole and positioning mandrel (or positioning pin) for random random contact. Figure 9 shows the workpiece mounted on the mandrel is placed in such a vertical positioning that; with mandrel positioning horizontal milling machine keyway, although the mandrel is placed horizontally, but in the mandrel on the loading and unloading of workpieces in the table next to the machine On the work, so the workpiece positioning hole and the mandrel is still random edge random contact. Still milling precision trench as an example to discuss this positioning method △ JW and △ BC.