Cutting Force Adapted Control Application in Micropositioned Machining
Joon Hwang* and Eui-Sik Chung**
*Department of Aeronautical & Mechanical Design Engineering, ChungJu National University
72 Daehak-Ro, Chungju, Chung-Buk 380-702, Republic of Korea
**Department of Mechanical Design Engineering, Hanbat National University
16-1 Dukmyung-Dong, Yuseong-Gu, Daejeon 305-719, Republic of Korea
In the machining process, cutting force is a physical quantity well reflecting the process itself. Measured cutting force is used to identify the tool wear, surface roughness, chip formation, chatter stability and dynamic cutter runout problems. The cutting force linearity is used to measure and control the irregular cutting phenomena and machining process. We applied force-adaptive cutting control technology to evaluate chatter and real-time compensation for dynamic cutter runout. We proposed the concept of force-adaptive cutting control in the angle domain based upon proportional-integral control to control chip-load variation in machining. The micropositioning control of cutting tool or workpiece positioning using a low-friction sliding table and piezoelectric actuator changed the chip-load variation. Our results are expected to provide invaluable information in precision machining technology.
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