我厂是生产天然气发动机的专业厂,在精镗机体主轴孔时遇到一个难题,因为要保证5个孔的同心度,所以是用一根长镗杆同时穿入所要镗的孔内,加工时先对好刀从孔端面镗进去2mm左右深,然后停机进行测量,因孔中穿入镗杆无法用卡尺等万能量具测量,只好用卡钳,效率低易出 I plant is the production of natural gas engine professional factory in the fine boring machine spindle hole encountered a problem, because to ensure the concentricity of the five holes, it is a long boring bar at the same time into the hole to be boring, processing When the first good knife boring from the hole end to about 2mm deep, and then shut down for measurement, because the hole into the boring bar can not be measured with a universal caliper and other measurements, had to use calipers, inefficient and easy