Phase-Division-Based Dynamic Optimization of Linkages for Drawing Servo Presses |
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Authors: | Zhi-Gang Zhang Li-Ping Wang Yan-Ke Cao |
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Affiliation: | 1.JIER Machine-Tool Group Co., Ltd,Jinan,China;2.Department of Mechanical Engineering,Tsinghua University,Beijing,China |
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Abstract: | Existing linkage-optimization methods are designed for mechanical presses; few can be directly used for servo presses, so development of the servo press is limited. Based on the complementarity of linkage optimization and motion planning, a phase-division-based linkage-optimization model for a drawing servo press is established. Considering the motion-planning principles of a drawing servo press, and taking account of work rating and efficiency, the constraints of the optimization model are constructed. Linkage is optimized in two modes: use of either constant eccentric speed or constant slide speed in the work segments. The performances of optimized linkages are compared with those of a mature linkage SL4-2000A, which is optimized by a traditional method. The results show that the work rating of a drawing servo press equipped with linkages optimized by this new method improved and the root-mean-square torque of the servo motors is reduced by more than 10%. This research provides a promising method for designing energy-saving drawing servo presses with high work ratings. |
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