CAD/CAM-based Position/Force Control for a Ball-End Abrasive Tool and Its Application to an Industrial Robot

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概要

• 論文の詳細を見る

• Control of robotic mold polishing is considered in this paper. CAD/CAM-based position/force controller that simultaneously performs stable force control and exact pick feed control along curved surface is presented for articulated-type industrial robots. The force feedback loop controls the polishing force consisting of the contact force and the kinetic friction force. During mold polishing, the position feedback loop has a delicate contribution to the force feedback loop in Cartesian space so that the abrasive tool does not deviate from the desired trajectory but keeps a constant pick feed. When a mold polishing robot runs, cutter location (CL) data with normal vectors are used for not only a desired trajectory of tool translational motion but also desired contact directions given to a mold. The CL data allow the robot to realize a complete non-taught operation of the position and the contact direction. In this paper, a simple experiment is conducted by using an industrial robot with a ball-end abrasive tool in order to evaluate the effectiveness of the proposed method. The target workpiece is an aluminum PET bottle blow mold after NC machining, whose curved surface has small cusp marks with each pick feed of about 0.3 mm height. The results show that the proposed mold polishing robot with the CAD/CAM-based position/force controller can uniformly remove the cusp marks and further achieve mirror-like surface quality without undesirable over-polishing.

• 社団法人 日本機械学会の論文

著者

• WATANABE Keigo

  Department of Intelligent Mechanical Systems, Okayama University

• Nagata Fusaomi

  Dep. Of Electronics And Computer Sci. Tokyo Univ. Of Sci.

• NAGATA Fusaomi

  Department of Electronics and Computer Science, Tokyo University of Science

• HASE Tetsuo

  Research and Development Center, Meiho Co. Ltd.

• HAGA Zenku

  Research and Development Center, Meiho Co. Ltd.

• OMOTO Masaaki

  Research and Development Center, Meiho Co. Ltd.

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• CAD/CAM-based Position/Force Control for a Ball-End Abrasive Tool and Its Application to an Industrial Robot
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