D.K. Choi, Y.T. Oh, and S.J. Kim (Korea)
Cutting torque, tool wear, spindle motor current
Cutting torque was estimated using the spindle motor current and controlled through feedrate manipulation for prevention of tool failure. A PID controller was used to control the cutting torque measured indirectly from the spindle motor current. The effect of cutting torque control on tool wear was also investigated. Experimental results showed that the cutting torque was regulated well at a given reference level and the risk of tool failure was reduced remarkably through cutting torque control. Moreover, the suggested cutting torque control system does not disturb the cutting process and is practical in industrial environment.
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