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在组合机床上,为完成孔内切槽、车端面等需横向走刀的工艺,经常采用各种结构的偏心传动特种工具。图1所示为此类工具的一个实例。这是一根偏心进给车端面刀。其工作原理是,开始工作时,动力头带动整个工具前进,当到达车端面的位置时,螺母3即被夹具挡住,心轴5停止轴向移动,刀杆1继续前进。由于心轴5上有螺旋槽,它除了作切削回转外,同时又因为心轴5的中心与孔的中心(即导向套中心)有一偏心值,故心轴还作附加回转,从而使心轴上的刀头与孔中心的距离增大,完
In the combination of machine tools, in order to complete the hole slot, car face and other cross-cutting process, often using a variety of structural eccentric drive special tools. Figure 1 shows an example of such a tool. This is an eccentric feeding end-face knife. Its working principle is that at the beginning of work, the power head drives the entire tool to move forward. When the end of the vehicle reaches the position of the car, the nut 3 is blocked by the clamp, the spindle 5 stops moving axially, and the cutter bar 1 continues to move forward. Because the mandrel 5 has a spiral groove, which in addition to cutting rotation, but also because the center of the mandrel 5 and hole center (ie, the center of the guide sleeve) has an eccentric value, so the mandrel is also additional rotation, so that the mandrel On the head and the hole center distance increases, finished