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用拉刀拉孔可以获得较高的表面质量,但也常会出现一些问题,而尤以圆孔拉削最甚。由于拉孔时拉刀是通过工件内壁的紧紧包围而进行切削的,故表面质量上存在的一些问题,往往因不能直接观察切削情况而难以辨明其原因。通过实践证明,拉刀本身的制造质量是影响拉孔表面质量的主要因素。为便于控制拉刀制造和修磨质量,合理使用拉刀,以利提高拉
Pull the hole with a broach can get a higher surface quality, but often there will be some problems, especially in the most round hole broaching. As the pull-hole when the broach through the workpiece wall tightly surrounded by cutting, so the surface quality of some of the problems are often not directly observed because of the cutting situation and difficult to identify its causes. Practice has proved that the quality of the broach itself is the main factor affecting the surface quality of the hole. In order to facilitate the control of broaching manufacturing and grinding quality, rational use broaches, to facilitate the pull