我车间经常加工一些如图1的埋头螺丝,在加工端头的螺丝口时,过去是用手踞或铣床分度头来加工。这样加工不但效率低,工具消耗大,而且质量也不好。我车间王树春同志提出用如图2的工具来加工螺丝口,结 I often shop some of the countersunk head screws shown in Figure 1, in the process of the head screw mouth, the past is the use of hand or milling machine sub-head to processing. This process is not only inefficient, expensive tools, and the quality is not good. Comrade Wang Shu-chun, my workshop proposed the use of tools such as Figure 2 to machine screw mouth, knot