Abstract
This study proposes a new, large-scale, eight-link mechanical press that consist of four single degree-of-freedom (DOF) planar eight-link mechanisms and has a carrying capacity of 2000 tons. Kinematic analysis of a single DOF planar eight-link mechanism is presented. On the basis of kinematic analysis and the required output displacement curve, a single DOF planar eight-link mechanism is synthesized using differential evolution algorithm. We propose the use of an improved minimum sum of displacement variance (MSDV) cost function to minimize the influence of processing error on the same positions of different single DOF planar eight-link mechanisms. The improved MSDV cost function enables the setting of different weights for different stages with one stroke depending on the importance of each stage. Simulation results show that the designed mechanical press is consistent with the requirements, and that the improved MSDV cost function effectively reduces the influence of machining error.
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Recommended by Associate Editor Gang-Won Jang
Xinfang Ge, who received his bachelor’s degree from the Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, is currently a graduate student in the same university. His research interests include structure design and vibration analysis in mechanical engineering.
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Ge, X., Zhu, C. & Jin, Y. Optimization design for a new large-scale eight-link mechanical press. J Mech Sci Technol 28, 1403–1410 (2014). https://doi.org/10.1007/s12206-013-1173-9
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DOI: https://doi.org/10.1007/s12206-013-1173-9