Abstract
Conical end-mills are widely used in CNC machining and the flank has a great influence on the performance of the end-mill. However, the complex structures of conical flank make it difficult to grind. The traditional method for conical flank grinding is to control the grinding wheel with a 3-axis archimedes helix motion, which cannot guarantee the accuracy of the desired flank parameters, i.e., relief angle and flank angle. To solve this problem, this paper proposed a wheel path generation method for 4-axis CNC conical flank grinding. In this model, the grinding processes were discretized into a finite of cylindrical end-mill grinding. For each cylindrical end-mill, the machined flank parameters could be calculated within the cross-section through the envelope theory. Additionally, the geometrical constraints to avoid interference and abnormal flank profile were developed based on the cylindrical end-mill. The wheel path was obtained by calculating the wheel’s position and orientation for the discretized cylindrical end-mill section by section. Also, an integral procedure was built to optimize and simulate the conical flank grinding. The simulation results showed that the proposed method had a wide range of applications that could provide a general solution for the conical CNC flanking operations and also could be extended to grind the complex surface of end-mills in the future study.
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Funding
This work was partially supported by the funds of the Key Research and Development Plan of Shandong Province (2019GSF108005), the Shandong Provincial Natural Science Foundation, China (ZR2017BEE018), and the China Postdoctoral Science Foundation(2016M592182).
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Yang, J., Wang, L., Fang, Y. et al. A novel approach to wheel path generation for 4-axis CNC flank grinding of conical end-mills. Int J Adv Manuf Technol 109, 565–578 (2020). https://doi.org/10.1007/s00170-020-05693-0
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DOI: https://doi.org/10.1007/s00170-020-05693-0