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在大量生产偏心销子时,由于尺寸规格多,而每种尺寸的需要量不大,如果用自动车床加工就不合算。但因为总数还不少,如果直接采用通常的四爪卡盘加工,则又显得不经济。这时,可以采用附图所介绍的一种辅助卡胎。一、卡胎的结构(见附图)辅助卡胎中包括表面淬过火的方形钢块3。方形四边磨平并且相互垂直。钢块的四边带有台阶,便于轴向定位。前部车有螺纹,和淬过火的圆螺母4相配。中心镗有圆孔,其前部有退拔,与套筒夹头2相配。套筒夹头的末端
In the mass production of eccentric pins, due to the size and size, and the need for each size is not large, if the use of automatic lathe is not cost-effective. However, because the total number is still quite small, it is uneconomical if the usual four-jaw chuck is directly used. At this time, one of the auxiliary card tires described in the accompanying drawings may be used. First, the structure of the tire (see attached drawings) The auxiliary tire includes surface quenched over the square steel 3. Square four sides polished and perpendicular to each other. Four sides of the block with steps to facilitate axial positioning. The front car is threaded and matches the quenched round nut 4. Bored with a center hole, the front of the withdrawal, and the sleeve chuck 2 match. End of collet chuck