平板流铸工艺中冷却辊的温度场数值模拟

Thermal Analysis for Cooling Rolls in Planar-flow Melt Spinning

摘要:

采用有限元分析方法（Finite Element Analysis, FEA）对平板流铸工艺（Planar-flow Melt Spinning, PFMS）生产非晶带材过程中的冷却辊进行了稳态温度场数值模拟，获得了冷却辊温度场及其热流的分布特点，并探讨了辊外径、辊厚、辊速3个参数对辊表面温度的影响规律。结果表明：增大辊外径，减小辊厚，降低辊速，均有助于降低辊面温度。由正交试验结果可知，对辊外表面温度的影响作用由大到小的顺序依次为辊厚、辊速、辊外径；对辊内表面温度的影响作用由大到小的顺序依次为辊速、辊外径、辊厚。最后通过综合平衡分析，得出了能将辊面温度控制在目标范围内的参数优化设计方案。此项研究为非晶带材平板流铸成形的模具设计及工艺优化实践提供了理论支持

Abstract:

A steady-state thermal analysis for cooling rolls in planar-flow melt spinning (PFMS) was carried out using finite element analysis. The effects of the roll diameter, the roll thickness and the roll casting speed on the temperature of cooling roll were investigated. Results show that the temperature of the cooling roll can be decreased by increasing the roll diameter, decreasing the roll thickness and reducing the roll casting speed. Based on the orthogonal process analysis, the roll thickness is the main influence factor of outside surface temperature of the roll, followed by the casting speed and the roll diameter. The roll casting speed has the most obvious influence on inside surface temperature of the roll while the effects of the roll diameter and the roll thickness are less remarkable. Finally by considering various important indexes including mechanical strength, control stability as well as thermal requirements, the parameter optimization design to keep the surface temperature of the cooling roll in the specific range was obtained.