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在车床上通常会遇到这种工作,工件是一长度和直径均为152.4mm 的铝管,其两端面需加工。加工后的端面必须与外径垂直。管坯由锯床下料。要想通过车床夹盘,是很难保证工件的同心要求的。下面介绍一种简单的定心装置,就可解决这个问题。用一个旧滚动轴承,压入钢轴一端,然后紧固在车床的转位刀架上(图1)。当安装工件时,夹盘先稍稍夹紧;车床开始以慢速旋转;同时移动横刀架,直到轴承与工件接触。当横刀架继续向前时,工件的同心位置就很容易察看到了。这时,主轴停转,然后把工件牢牢夹紧。当车削完一端后,将另一端颠倒过来,夹紧并车削。
This type of work is commonly encountered in lathes, where the workpiece is an aluminum tube with a length and diameter of 152.4 mm, both ends of which are to be machined. The finished face must be perpendicular to the outside diameter. Tube blank by the sawing machine. To pass the lathe chuck, it is difficult to ensure the concentric requirements of the workpiece. The following describes a simple centering device, you can solve this problem. With an old roller bearing, press in one end of the steel shaft and fasten it to the turret of the lathe (Fig. 1). When installing the workpiece, the chuck is slightly clamped first; the lathe begins to rotate at a slow speed; and at the same time the cross-carrier is moved until the bearing contacts the workpiece. When the crosshead to continue forward, the concentric position of the workpiece is very easy to see. At this time, the spindle stops and the workpiece is firmly clamped. When finished turning the other end, the other end upside down, clamping and turning.