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在用耐热温度数据记录仪测温实验的基础上,建立了网带式连续钎焊炉内钢坯升温过程的数学模型,利用有限元软件ANSYS对其温度场进行有限元数值模拟。通过计算出45钢坯料不同表面温度的实时换热系数,同时将环境温度作为时间的函数施载,模拟得到坯料在钎焊炉中各区段的温度场的实时分布情况。同时模拟计算了钎焊炉加热段内坯料特征点处温度随时间的变化曲线,并与测温曲线进行了对比。结果表明:模拟计算值与实测数据吻合良好,温差值最大为9℃,验证了所建传热模型的正确性。
On the basis of temperature measurement experiment with heat-resistant temperature data logger, the mathematic model of billet temperature rise in mesh-belt continuous brazing furnace was established. The temperature field was simulated by finite element software ANSYS. The real-time heat transfer coefficient of different surface temperature of 45 steel billets was calculated, and the ambient temperature was applied as a function of time to simulate the real-time distribution of the temperature field of billet in each section of the brazing furnace. At the same time, the temperature curve of the billet in the heating zone of the brazing furnace was simulated and compared with the temperature measurement curve. The results show that the calculated values are in good agreement with the measured data, and the maximum temperature difference is 9 ℃, which verifies the correctness of the heat transfer model.