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Less interference tool-path planning method for quarter revolution penetration and retraction trajectories in internal cylindrical thread helical milling

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Abstract

Critical interference error can be mostly resulted from illogical tool-path generations in the penetration and retraction segments of internal cylindrical thread helical milling. Therefore, a less interference tool-path planning method is proposed for the quarter revolution penetration and retraction trajectories in internal cylindrical thread helical milling. Firstly, the parametric expression of the complete tool path of internal cylindrical thread helical milling is established; after that, a definition of eccentricity parameter m is given to adjust the radius of the penetration and retraction trajectories, and Z-axis coordinate of any point on the tool path is defined as a function of the θ; thus, the planned penetration and retraction trajectories in internal cylindrical thread helical milling with the m are derived; finally, the proper eccentricity parameter m is decided to improve the machining accuracy of thread by exploring the influence of the m on the interference error. Taking the experimental of milling, an M20 × 1.5 thread using a φ8 × 1.5 cutter as one of the examples that indicate the maximum interference error of the planning method (m = 0.4) can be reduced by 30.93%, compared with the original trajectory, and can dramatically improve the precision of internal cylindrical thread helical milling.

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Acknowledgments

The authors acknowledge and express their sincere thanks towards Zhuzhou Cemented Carbide Cutting Tools Co. Ltd. of China for providing cutting tool data for the study.

Funding

This work is supported by the key program of Hunan Provincial Department of Science and Technology of China (No.2016GK2014), Hunan Provincial Natural Science Foundation of China (No. 2020JJ6035), program of the Hunan Provincial Department of Education (No.19 K094),key program of Xiangtan Science and Technology Bureau, Hunan, China (No.CG- ZD20201003), and general program of Xiangtan Science and Technology Bureau, Hunan, China (No.CG- YB20201007), which the authors greatly appreciate.

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  1. School of Mechanical Engineering, Xiangtan University, Xiangtan, 411105, Hunan, People’s Republic of China

    Zihua Hu, Yiran Tang, Yuanhao Fan, Changjiang Qin, Xudong Zhang, Yeming Zou & Xiaogao Chen

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  1. Zihua Hu
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  2. Yiran Tang
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  3. Yuanhao Fan
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  4. Changjiang Qin
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  5. Xudong Zhang
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  6. Yeming Zou
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  7. Xiaogao Chen
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Correspondence to Zihua Hu.

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Hu, Z., Tang, Y., Fan, Y. et al. Less interference tool-path planning method for quarter revolution penetration and retraction trajectories in internal cylindrical thread helical milling. Int J Adv Manuf Technol 111, 2687–2703 (2020). https://doi.org/10.1007/s00170-020-06253-2

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  • DOI: https://doi.org/10.1007/s00170-020-06253-2

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