注射机模具加热系统的温度场快速优化

Fast optimization of thermal field for mould heating system of injection machine

针对注射机模具加热系统中电热板表面温度场不均匀问题,结合线性热传导叠加原理,提出一种快速温度场优化方法来优化电热板中热管的功率分布.根据线性热传导问题的数学定义,结合线性系统的基本性质得出了线性热传导叠加原理,并且给出了线性热传导温度场的快速优化算法.通过分析单根电热管对电热板温度场的敏度响应获取热管的温度误差,在此基础上结合线性热传导温度场优化算法,利用Matlab软件计算出电热板中热管的功率分布,有限元模拟优化后的电热板温度场符合行业标准.通过实验测量优化后电热板的温度场,实测结果与数值模拟结果相吻合,验证了该优化方法的可行性.

For the non-uniform distibution of thermal field on the surface of electric heating plate in the mould heating system of injection machine,the fast optimization algorithm of thermal field was put forward to optimize the power distribution of heat pipe in the electric heating plate through combining the linear thermal conduction superposition principle.According to the mathematical definition of linear thermal conduction and combining the fundamental nature of linear system,the linear thermal conduction superposition principle was obtained,and the fast optimization algorithm of linear thermal conduction thermal field was given.Through analyzing the sensitivity response of the single heat pipe to the thermal field of electric heating plate,the temperature error of the pipe was obtained.Based on above analysis and combined with the optimization algorithm,the power distribution of the pipe was calculated using Matlab software.The thermal field of electric heating plate,optimized by finite element simulation,accords with the industry-standard.For the optimized thermal field of electric heating plate,the experimental results match with the numerical simulation results,which verifies the feasibility of the present optimization method.