热水泵回转阀的圆周上分布有许多孔,过去是用划线的方法确定孔的位置,然后进行加工,这种加工方法生产率低,而且质量不高。后来我们改进了一种带分度盘的等分圆周钻模。经使用证明,效果良好。 There are a number of holes distributed around the circumference of the hot water pump rotary valve. In the past, the position of the hole was determined by scribing, and then the processing was performed. The processing method was low in productivity and low in quality. Later, we improved an equidistant circumferential drill with indexing plate. The use of proof, the effect is good.