Development of a Three-Degree-of-Freedom Parallel Workpiece Table for Ceramic Grinding

Abstract:

The grinding precision and the surface characteristics of the engineering ceramic are hard to control because of the hardness and brittleness. In order to grind the engineering ceramic under ductile mode, it is necessary to reduce the displacement of the grinding machine for the limitation of its stiffness to keep the grinding parameters in micro scale. A three-degree-of-freedom parallel workpiece table for ceramic grinding is developed to compensate the deformation of grinding machine caused by grinding force during grinding process. Based on the principle of negative stiffness, the workpiece table can generate a displacement which is reverse to the loading direction to compensate the deformation of the grinding machine. The developed precise workpiece table is a three degree of freedom negative stiffness controllable parallel mechanism composed of three piezoelectric actuators and a flexible parallel mechanism. Then the characteristics, such as kinematics and workspace, of the workpiece table are studied.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 2361-2366
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.2361
• Online since: February 2012
• Authors: Jian Zhong Hu, Min Wang, Tao Zan, De Sheng Li
• Keywords: Ceramic Grinding, Kinematics, Piezoelectric Actuator, Workspace

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