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Slider movement planning based on improved S-curve acceleration algorithms for servo presses
WANG Jun, WU Kai, DING Wuxue
download PDFAbstract. Servo press is a forming equipment that uses a servo motor to drive a crank slider for stamping and deep drawing process. The servo drive can adjust the motor speed in real time and dynamically, which provides an important support for the dynamic adjustment of the crank slider movement. To realize the smooth reciprocating movement of the large-mass and high-inertia slider, it is necessary to develop a motor speed adjustment algorithm to achieve a good match between the movement load of the slider and the torque that the motor can bear, to ensure the operation safety of the whole machine. S-curve algorithms are often used for the planning of slider movement curves, which is easy to produce flexible impact on the motor. Therefore, to improve this situation, an improved S-curve algorithm is proposed based on the above common methods, which realizes the motion control method of smooth speed change. In this paper, a movement planning algorithm for servo press slider with improved S-curve is proposed based on the 7-phase S-curve acceleration algorithm. Firstly, the kinematic calculation of the crank slider mechanism is carried out. Secondly, 4 control points are set up to divide the slider movement curve of the typical drawing process, including the idle feed stage, deep drawing stage, idle return stage, and loading/unloading stage. Furthermore, the uniform acceleration stage and the uniform deceleration stage are removed, and the acceleration cusp was smoothed, and the improved S-curve algorithm was obtained. Finally, the large-scale crank slider servo press and its deep drawing parameters in a literature are taken as an example to solve the slider movement curves by using the improved S-curve. The results show that the improved S-curve algorithm can be used for servo press slide motion profile planning, which can realize efficient deep drawing process mode.
Keywords
Slider Movement Planning, Servo Press, S-Curve, Deep Drawing Process
Published online 9/15/2024, 11 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: WANG Jun, WU Kai, DING Wuxue, Slider movement planning based on improved S-curve acceleration algorithms for servo presses, Materials Research Proceedings, Vol. 44, pp 569-579, 2024
DOI: https://doi.org/10.21741/9781644903254-61
The article was published as article 61 of the book Metal Forming 2024
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] F. Peng, C. Wang, H. Chai, Z. Shao, S. Wang, B. Wang, Lightweight slider design for a servo press based on its layered structure, J. Tsinghua Univ. (Sci. Technol.) 12 (2020) 1016-1022. https://doi.org/10.16511/j.cnki.qhdxxb.2020.22.016
[2] F. Peng, P. Zhang, L. Wang, Z. Shao, D. Yang, K. Yang, Energy management of servo press lines based on flywheel speed adaptive planning, J. Tsinghua Univ. (Sci. Technol.) 11 (2020) 927-933. https://doi.org/10.16511/j.cnki.qhdxxb.2020.22.014
[3] L. Yang, S. Xu, W. Shi, H. GE, Research on S Type Acceleration and Deceleration Time Planning Algorithm with Beginning and End Speed Non-zero, J. Mech. Eng. 23 (2016) 199-206. https://doi.org/10.3901/JME.2016.23.199
[4] Q. Hao, L. Guan, L. Wang, Intelligent acceleration/deceleration control algorithm for drive force for a heavy duty hybrid machine tool, J. Tsinghua Univ. (Sci. Technol.). 11 (2020) 1770-1773, 1778. https://doi.org/10.3321/j.issn:1000-0054.2009.11.009
[5] Z. Liu, S. Zhang, L. Cai, J. Yang, B. Xu, P. Xu, Five-phase S-curve Control Method Based on Particle Swarm Optimization, J. Beijing Univ Technol. 5 (2015) 641-648. https://doi.org/10.11936/bjutxb2014060067
[6] X. Zhang, D. Zhu, F. Pan, Research on S-curve flexible Acc/Dec control algorithm in NC machining, Manuf. Autom. 12 (2020) 68-73. https://doi.org/10.3969/j.issn.1009-0134.2020.12.014
[7] J. Chen, S.S. Yeh, J. Sun, An S-curve Acceleration/Deceleration Design for CNC Machine Tools Using Quintic Feedrate Function, Comput – Aided Des & Appl. 4 (2011) 583-892. https://doi.org/10.3722/cadaps.2011.583-592
[8] X. Guo, C. Li, A New Flexible Acceleration and Deceleration Algorithm, Journal of Shanghai Jiaotong University. 2 (2003) 205-207. https://doi.org/10.3321/j.issn:1006-2467.2003.02.016
[9] Y. Chen, W. Guo, F. Gao, NURBS-Based Feature Modeling and Trajectory Planning for Ram Motion of Servo Mechanical Presses, J. Shanghai Jiaotong Univ. 1 (2009) 138-142. https://doi.org/10.3321/j.issn:1006-2467.2009.01.031
[10] X. Qu, Design and simulations of non-uniform speed motion curves for a slider-crank servo press, Assem. Autom. 3 (2018) 336-346. https://doi.org/10.1108/AA-10-2016-131
[11] W. Shang, S. Zhao, Servo Press Processing Bezier-Model with Optimum, J. Xi’an Jiaotong Univ. 3 (2012) 31-35.
[12] J. Gu, T. Wu, C. Li, B. Zhang. Y. Zhang, Trajectory Fairing Algorithm for Shrub Pruning Based on Improved Cubic B-spline, Trans. Chin. Soc. Agric. Mach. S1 (2021) 89-97. https://doi.org/10.6041/j.issn.1000-1298.2021.S0.012.
[13] P. Cheng, P. Chen, Y. Lin, Small mechanical press with double-axis servo system for forming of small metal products, Int. J. Adv. Manuf. Technol. 68 (2013) 2371-2381. https://doi.org/10.1007/s00170-013-4851-y
[14] H. Luo, The Research on Interpolation Algorithm of NURBS Curve Based on Milne-Hamming Method and Acceleration/Deceleration Control Algorithm, Nanjing: Nanjing University of Aeronautics and Astronautics, 2020.
[15] Q. Song, B. Guo, J. Li, W. Yin, Flexible Acceleration and Deceleration Control Algorithm for Servo Press, Trans. Chin. Soc. Agric. Mach. 6 (2013) 269-273. https://doi.org/10.6041/j.issn.1000-1298.2013.06.047
[16] H Lin, D Ye, X Wang, Y Liu, Motion planning of main drive system of high speed fine blanking press by double servo drive, J. Huazhong Univ. Sci. Technol. 4 (2018) 6-11. https://doi.org/10.13245/j.hust.180402
[17] Y. Sun, J. Hu. Y. Cheng, W. Ruan, Characteristics Analysis of Working Mechanisms for Servo Mechanical Presses, Appl. Mech. Mater. 220-223 (2012) 762-767. https://doi.org/10.4028/www.scientific.net/AMM.220-223.762
[18] W. Yin, J. Li, Q. Song, Planed and Optimized Drawing Trajectory for Heavy Servo Presses, CFHI Technol. 1 (2015) 1-5. https://doi.org/10.3969/j.issn.1673-3355.2015.01.001
