常用的三爪卡盘为定心卡盘,将工件卡紧,中心已确定。随心卡盘不起定心作用,定心由其它方法完成。随心卡盘的结构如图1。随心卡盘制做简单,把旧的或精度比较差的卡盘体改制一下即可。将φ1加工成φ1-△,φ2加工成φ2+△。其△值可根据工件偏心的大小而定,一般取△=1～4毫米。H加工成比伞齿盘高1～2毫米。然后,将改进的卡盘 Commonly used three-jaw chuck centering chuck, the workpiece chuck, the center has been identified. Heart chuck can not afford to be centered, centering done by other means. Wrestling chuck structure shown in Figure 1. Freewheeling chuck system to do simple, the old or less accurate chuck body system can be transformed. Φ1 processed into φ1- △, φ2 processed into φ2 + △. The △ value according to the size of the eccentric workpiece, generally take △ = 1 ~ 4 mm. H is machined to be 1 to 2 mm above the bevel gear. Then, will improve the chuck