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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 18    No. 5    October 2008

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3D FEA simulation of 4A11 piston skirt isothermal forging process
DONG Wan-peng(董万鹏), CHEN Jun(陈 军)

Department of Plasticity Engineering, Shanghai Jiao Tong University, Shanghai 200030, China

Abstract:To eliminate the defects during piston skirt isothermal forming process, simulations under different process parameters such as the deformation temperature and friction factor were analyzed with the rigid-plastic FEA. Deformation pattern, metal flow and influence of process parameters were concluded. The prediction load value with a relative error of 4.98% is more accurate to the testing one than that from the empirical formula whose relative error is up to 50.8%. Finally, based on the simulation results, an improved process at 300 ℃ and 0.005−0.05 s−1 was verified without any defects by the physical try-out.

 

Key words: finite element analysis(FEA); piston skirt; isothermal forming; internal combustion engines

ISSN 1672-7029
CN 43-1423/U

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