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1 引言在深孔的钻削加工中 ,由于工件材料内部组织不均匀、局部硬点以及钻头磨钝和排屑不畅等原因 ,使得钻头所受的扭矩过大 ,导致钻偏、钻头扭断、加工中断甚至工件报废。因此 ,有必要对钻削扭矩进行测量与控制 ,以便扭矩超过某一极限值时 ,钻头能够自动退回 ,实现过载保护 ,
1 Introduction In deep hole drilling, due to uneven internal organization of the workpiece material, local hard points and drill bit blunt and poor chip removal and other reasons, making the drill bit torque is too large, leading to bias, bit twist , Processing interruption or scrapped parts. Therefore, it is necessary to measure and control the drilling torque, so that when the torque exceeds a certain limit, the drill bit can be automatically returned to achieve overload protection,