Development of a novel variable rake angle mechanism for noncircular turning and its control

• Published in: Journal of mechanical science and technology Vol. 24; no. 5; pp. 1035 - 1040
• Main Authors: Kim, Byung-Sub, Tsao, Tsu-Chin
• Format: Journal Article
• Language: English
• Published: Heidelberg Korean Society of Mechanical Engineers 01.05.2010; Springer Nature B.V; 대한기계학회
• Subjects: Actuators; Applied sciences; Computer science; control theory; systems; Control; Control system synthesis; Control theory. Systems; Dynamical Systems; Engineering; Exact sciences and technology; Industrial and Production Engineering; Inverse kinematics; Kinematics; Mechanical Engineering; Rake angle; Repetitive controllers; Rotational; Turning; Vibration; 기계공학; Noncircular turning; Robust control; Variable rake angle mechanism; Repetitive control; System with two degrees of freedom; Replacement problem; Machining; Control synthesis; Turning; Experimental study; Modeling; Inverse problem; Rake angle; Engineering design; Maneuverability; Mechanism synthesis; Kinematics; Robustness; Actuator
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-010-0318-3

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.