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An intelligent feedrate scheduling based on virtual machining

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Abstract

Off-line feedrate scheduling is an advanced methodology to automatically determine optimum feedrates for NC code modification. However, most existing feedrate scheduling systems have limitations in generating the optimised feedrates because they use the material removal rate or the cutting force model which is dependent on cutting conditions. This paper proposes a feedrate scheduling system based on an improved cutting force model that can predict cutting forces accurately in general end milling situations. Original blocks of NC code were divided into smaller ones with the optimised feedrates to adjust the peak value of cutting forces to a constant value. The acceleration and deceleration characteristics for a given machine tool were considered for realistic feedrate scheduling. Moreover, a modified type of Z-map model was developed to reduce the entry/exit angle calculation error in the cutting force prediction and named the moving edge node Z-map (ME Z-map). Pocket machining experiments show that the proposed method is accurate and efficient in maintaining the cutting force at a desired level.

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Acknowledgements

This work was supported by the Korean Research Foundation, grant no. KRF-2000-041-E00092.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Pohang University of Science and Technology, San 31 Hyoja-dong, Nam-gu, 790-784, Pohang, Kyungbuk, S. Korea

    Han Ul Lee & Dong-Woo Cho

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  1. Han Ul Lee
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  2. Dong-Woo Cho
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Correspondence to Dong-Woo Cho.

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Lee, H.U., Cho, DW. An intelligent feedrate scheduling based on virtual machining. Int J Adv Manuf Technol 22, 873–882 (2003). https://doi.org/10.1007/s00170-003-1609-y

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  • DOI: https://doi.org/10.1007/s00170-003-1609-y

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