在车床上紧定车刀,一般都用方头螺栓。但使用一段时间后,方头变形,如果再用力过猛,会损坏螺纹,甚至扭断螺栓或损伤刀架螺孔,刀体也会因留下压痕而损坏。为了克服这些缺点,笔者对刀架螺栓进行了改进,以C620等车床刀架螺栓为例,说明如下: 螺栓如图1所示,将原方头螺栓头部车成球面,再车一个R1.5的弧槽。压垫如图2所示,开口的长度为周长的三分之一左右,以使钢丝环顺利插入。压 Tight lathe on the lathe, usually with square head bolts. However, after using for a period of time, the square head deforms. If the re-use force is too high, it will damage the thread and even break the bolt or damage the screw hole of the tool holder. The body will also be damaged by leaving the indentation. In order to overcome these shortcomings, the author of the turret bolt has been improved to C620 lathe turret bolts, for example, described as follows: The bolt shown in Figure 1, the original square bolt head car into a spherical, and then a R1 car. 5 arc groove. Pressure pad shown in Figure 2, the length of the opening length of about one-third, so that the smooth insertion of steel wire ring. Pressure