Abstract
A prototype tool stage with a variable rake angle mechanism has been developed and controlled. The objective of the variable rake angle mechanism is to provide two-degrees-of-freedom to the conventional noncircular turning process, so that the rotational tool mechanism can compensate for the rake angle change caused by the noncircular cam profile itself while the translational tool motion generates the cam profile. Inverse kinematics, kinematic sensitivity and stiffness, and design of the variable rake angle mechanism are discussed. Robust repetitive controllers are designed for two actuators in the variable rake angle mechanism. Two actuators operate together to change the tool position as well as the tool angle. Experimental results on the variable rake angle mechanism support the design concept and control approach.
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This paper was recommended for publication in revised form by Associate Editor Dae-Eun Kim
Byung-Sub Kim received the B.E. degree from Chung-Ang University, Korea, in 1990 and the M.S. degree from KAIST, Korea, in 1992 and the Ph.D. degree from the University of Illinois at Urbana-Champaign, U.S.A. in 2001, all in mechanical engineering. He worked as a post-doc at UCLA from 2001–2003 and joined Korea Institute of Machinery & Materials in August 2003. His research includes modeling and control of mechanical systems, high precision machine tools, and mechatronics. His recognition includes the 2002 O. Hugo Shuck Best Paper Award from the American Automatic Control Council for his paper presented at 2001 American Control Conference.
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Kim, BS., Tsao, TC. Development of a novel variable rake angle mechanism for noncircular turning and its control. J Mech Sci Technol 24, 1035–1040 (2010). https://doi.org/10.1007/s12206-010-0318-3
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DOI: https://doi.org/10.1007/s12206-010-0318-3