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Feed Rate Determination Method for Tool Path Interpolation Considering Piecewise-Continued Machining Segments with Cornering Errors and Kinematic Constraints

Syh-Shiuh Yeh
Department of Mechanical Engineering, National Taipei University of Technology, Taipei, Taiwan

Abstract—Computer numerical control (CNC) machine tools operated at high speeds and under high-acceleration machining conditions with discontinuous tool paths cause undesirable vibrations because of the rigidity of the mechanical structure and abrupt changes in the feed rates. Therefore, this study develops a feed rate determination method for tool path interpolation to determine proper feed rates at the junctions of adjacent piece-wise continued machining segments. This method helps limit over-cutting, feed acceleration, and feed jerk values at junctions. Experiments conducted on a three-axis CNC milling machine using a tool path with different corner angles successfully validated the executing performance and feasibility of the approaches developed in this study.

Index Terms—feed rate determination, path interpolation, cornering errors, kinematic constraints

Cite: Syh-Shiuh Yeh, "Feed Rate Determination Method for Tool Path Interpolation Considering Piecewise-Continued Machining Segments with Cornering Errors and Kinematic Constraints," International Journal of Mechanical Engineering and Robotics Research, Vol. 8, No. 3, pp. 354-360, May 2019. DOI: 10.18178/ijmerr.8.3.354-360