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在车床上加工刚性不足的细长轴时,通常采用中心架来支承工件。为此,必须先在轴上精确地车出被中心架支承的轴颈。当由于某种原因,不能先车出轴颈时,采用中间套筒调整就很麻烦。这里介绍的自动定位中心架套筒,就很容易地达到调整目的。套筒的结构如附图所示。加工前,用与球面环4直径相同的心棒,先调节好中心架三个支承爪的位置,接着便把它固定。然后将套筒套在被加工轴上,并以螺钉2和7固定。这样便可把工件安装到机床上,使套筒被中心架支承着。自动定位的球面环4,是被碟形弹簧5压在套1的端面上,只要把工件转动几周,球面环4的轴线就能与
When machining a rigid shaft with insufficient rigidity on a lathe, the center frame is usually used to support the workpiece. For this purpose, the journal supported by the center frame must first be precisely articulated on the shaft. When, for some reason, you can not first get out of the journal, tuning with the middle sleeve can be cumbersome. The auto-centering sleeve described here is very easy to adjust. The structure of the sleeve is shown in the attached drawing. Before processing, with the spherical ring 4 the same diameter mandrel, first adjust the position of the center frame three support claws, and then it fixed. Then put the sleeve on the shaft to be machined, and fix with screws 2 and 7. This allows the workpiece to be mounted on the machine so that the sleeve is supported by the center frame. Automatic positioning of the spherical ring 4 is disc-shaped spring 5 is pressed on the end face of the sleeve 1, as long as the workpiece rotation for several weeks, the spherical ring 4 axis can be