1. Study on optimization of thermal spinning process of accumulator shell
- Author
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Bin Li, Peihao Zhu, Yinhong Xiao, Wenpeng Ma, Xiang Li, and Yunan Li
- Subjects
0209 industrial biotechnology ,Materials science ,Mechanical Engineering ,Constitutive equation ,Composite number ,Alloy steel ,02 engineering and technology ,engineering.material ,Multi-objective optimization ,Industrial and Manufacturing Engineering ,Finite element method ,Accumulator (energy) ,020303 mechanical engineering & transports ,020901 industrial engineering & automation ,0203 mechanical engineering ,Thermal ,engineering ,General Materials Science ,Composite material ,Spinning - Abstract
In view of the shortcomings of the existing hot spinning process technology of the accumulator shell, a method for optimizing the multi-spinning process parameters is proposed. The Johnson-Cook constitutive model of the accumulator shell material – 34CrMo4 alloy steel − was established with its parameters obtained experimentally. The finite element simulation was carried out for the hot spinning and closing process. Based on which, three parameters with the greatest influence on the spinning formation were studied: spinning temperature, spindle speed and friction coefficient. Combined with the central composite test, the response surface model and the mapping relationship between the three parameters and the maximum mises stress as well as the maximum wall thickness increment of the shell were established. The Pareto optimized solution set was obtained through multi-objective optimization. Under the condition of not affecting product quality, the optimized solution with low spinning temperature and high spindle speed is selected to reduce energy loss and improve work efficiency. The results indicate that the optimized process is experimentally verified to reduce the process temperature by nearly 30 °C, and the efficiency is increased by 25%.
- Published
- 2020