Abstract
As servo presses were developed, forming modes became more diverse. However, limited by their own capabilities of motion mechanism, servo presses exhibited differences in the inputted and outputted motion curves, which caused result differences between forming analysis and actual forming. In order to change the servo motion curve to be similar to the actual motion curve, thus improving forming performance during finite element analysis. In this study, MATLAB software was used to construct a model of the motion behavior of a direct-drive servo press. The model was used to predict motion curves and compare metal forming times. However, the error between the motion curve of prediction model and the true motion curve is 13.84%. Therefore, the true motion curve was measured to construct a servo motion trend surface. Then, the servo motion trend surface was integrated with the prediction program to optimize the prediction model. Finally, the finite element analysis software DYNAFORM is used to explore the difference between the thinning ratio and forming force of cylindrical cups with the optimized servo motion curve such as the stepping curve, the coining curve, and the pulsating curve. The analysis result shows that between the optimized and actual servo motion curves, the thinning ratio and forming maximum force error are reduced by 4% and 4.11%, respectively.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This study was financially supported by Taiwan’s National Science and Technology Council (108–2221-E-992–064-MY3 and 111–2218-E-992–002) and the Frontier Metal Forming Research and Development Center from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project of Taiwan’s Ministry of Education.
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The authors’ contributions are as follows: all authors conceived and designed the study; Bor-Tsuen Lin, Chun-Chih Kuo, Kuo-Wang Liu, and Po-Hsien Li performed the theoretical deduction, performed the experiments and the finite element simulations, and performed the process optimization and analysis; Kuo-Wang Liu and Tse-Chang Li contributed to the interpretation of the results; Kuo-Wang Liu and Po-Hsien Li took the lead in writing the manuscript; Bor-Tsuen Lin, Tse-Chang Li and Chun-Chih Kuo contributed actively in writing the manuscript; all authors provided critical feedback and helped shape the research, analysis and manuscript.
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Lin, BT., Liu, KW., Li, TC. et al. Motion profile optimization of servo press in deep drawing process of SUS 304 stainless steel sheets. Int J Adv Manuf Technol 127, 4181–4198 (2023). https://doi.org/10.1007/s00170-023-11699-1
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DOI: https://doi.org/10.1007/s00170-023-11699-1