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Abstract: Effective
control of temperature is key technique to realize aluminium isothermal
extrusion. On base of thermal conduction theory, equations to calculate
the needed thermal energy and heating power for container heating from
the room temperature to the desired value in aluminium extrusion and
equations to calculate the air-cooling quantity are gained. Based on
those equations, the heating and cooling system, which are used to
control temperature of the container in thermal extrusion is designed.
At the same time, the advantages and disadvantages of the container
induction heating are introduced. The temperature and stress
distribution in the container are simulated by FEM. Result reveals that
temperature of the container is uniform when it is heated and the
container heating must be in according with the process route because
thermal stress varies abruptly in the big temperature gradient. Then the
technique route to realize the temperature of the container is put
forward. Equations and the simulation result are used in the design of
100 MN oil-driven double action aluminium press and the product practice
shows equations is correct and simulation result is reliable.
Key words: Extrusion
Temperature control Container Heating and cooling FEM
CLC No: TG312
国家杰出青年科学基金(50225518)和西北工业大学博士创新基金(200209)资助项目.
Received 30520, received in revised form 20031013
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