Optimization design for a new large-scale eight-link mechanical press

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 analys...

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Bibliographic Details
Published in:Journal of mechanical science and technology 2014, 28(4), , pp.1403-1410
Main Authors: Ge, Xinfang, Zhu, Chang’an, Jin, Yi
Format: Article
Language:English
Subjects:
Control
Cost function
Degrees of freedom
Displacement
Dynamical Systems
Engineering
Errors
Industrial and Production Engineering
Kinematics
Mathematical analysis
Mechanical Engineering
Mechanical presses
Optimization
Vibration
기계공학
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Summary: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.
ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-013-1173-9