Analysis of Ultrasonic Welding Process using Optical Measurement

超声焊接是一种固态焊接技术，利用光学测量的运动分析方法对其进行了基础研究。采用数字相关法分析了超声焊接试验过程中焊接工具相对于工作材料的相对运动。将运动分析结果应用于应变场的可视化，评价了超声焊接过程中材料的动态行为。结果表明，焊接工具与工件材料之间的相对运动对焊缝界面组织的发展有很大的影响。

Basic study on ultrasonic welding, which is one of solid state bonding technique, has been performed using motion analysis by optical measurement. Relative motion of weld tool, with respect to the working materials, during ultrasonic welding tests are analyzed using the digital correlation method. The dynamic behavior of material during the ultrasonic welding has been evaluate applying the result of motion analysis to the visualization of strain field. It has been clarified that the relative motion between the weld tool and work material strongly affect the microstructure development at the weld interface.