超声固结区域温度场分析及实验研究

Temperature Field Analysis and Experiment Research of Ultrasonic Consolidation Area

温度是影响超声固结质量的重要因素,针对固结区域温度难以直接测量的现状,通过数值模拟研究工艺参数对固结温度的影响。首先,基于Hertz接触理论和Coulomb摩擦定律分析了固结区域的摩擦功,建立了固结区域的发热模型;其次,建立了钛铝箔材的超声固结三维热传导有限元模型,并且分析了主要工艺参数对固结区域温度场分布的影响;最后,为了验证模型的有效性,建立了超声固结加工温度测试平台,通过在基板埋植热电偶的方式测量固结时的温度,发现实验结果与数值仿真结果变化趋势一致,证实了模型的有效性。

Temperature is an important factor affecting the quality of ultrasonic consolidation.Due to the difficulty of direct measurement of the temperature in the consolidated area,this research illustrated the influence of process parameters on the consolidation temperature through numerical simulation.Firstly,based on the Hertz contact theory and the Coulomb friction law,the friction work in the consolidation area is analyzed,and the heating model of the consolidation area is established.Secondly,the three-dimensional thermal conduction finite element model of titanium aluminum foil is established,and the influence of the main process parameters on the temperature field distribution in the consolidation area is analyzed.Finally,in order to verify the validity of the model,a temperature test platform for ultrasonic consolidation is established,and the temperature of consolidation is measured by means of embedding thermocouple in the substrate.It is found that the experimental results are basically consistent with the trend of the numerical simulation results,which confirms the validity of the model.