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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 2    April 2003

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Numerical simulation and optimization of 
clearance in sheet shearing process
QIN Si-ji(秦泗吉), LI Hong-bo(李洪波), 
PENG Jia-geng(彭加耕), LI Shou-ben(李硕本)

Institute of Forging & Stamping, Yanshan University, 
Qinhuangdao 066004, China

Abstract:An analysis model to simplify the shearing and blanking process was developed. Based on the simplified model, the shearing process was simulated by FEM and analyzed for various clearances. An optimum clearance in the process was determined by new approach based on orientation of the maximum shearing stress on the characteristic line linking two blades, according to the law of crack propagation and experiments. The optimum clearance determined by this method can be used to dictate the range of reasonable clearance. By the new approach, the optimum clearance can be obtained conveniently and accurately even if there is some difference between the selected points, where the initial crack is assumed originated, and the actual one, where the initial crack occurs really.

 

Key words:  sheet shearing and blanking; cyclical symmetry model; clearance, optimization; FEM

ISSN 1672-7029
CN 43-1423/U

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