Analysis for relative motion in ultrasonic welding of aluminium sheet
Analysis for relative motion in ultrasonic welding of aluminium sheet
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DOI：
10.1179/1362171812y.0000000066
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发表时间：
2013-01
影响因子：
3.3
通讯作者：
Tomohiro Sasaki;Takehiko Watanabe;Yusuke Hosokawa;Atsushi Yanagisawa
中科院分区：
文献类型：
--
作者：
Tomohiro Sasaki;Takehiko Watanabe;Yusuke Hosokawa;Atsushi Yanagisawa
用高速摄像机对纯铝薄板的超声波焊接过程进行了观察。用数字图像相关法分析了焊接接头和铝板的动态振动特性。焊接过程包括以下三个阶段。首先，与焊接头接触的上部试样振动。在此阶段确认了部分焊接区域的形成。第二，上试件的振动幅度减小，而焊接头与上试件之间的摩擦力增大。在第二阶段中确认了部分结合区域的生长。第三，由于夹紧力，焊接部分开始塑性变形。第三阶段接头强度达到最大值。分析表明，焊接头和上部试样之间的相对运动主要影响接头强度的增加。
Ultrasonic welding of pure aluminium sheets was observed with a high speed video camera. The dynamic vibration behaviours of a welding tip and aluminium sheets were analysed using the digital image correlation method. The welding process consisted of the following three stages. First, the upper specimen in contact with the weld tip vibrated. The formation of partially welded regions was confirmed at this stage. Second, the vibration amplitude of the upper specimen decreased, while friction between the weld tip and the upper specimen increased. Growth of the partially bonded region was confirmed in the second stage. Third, the welding part began to plastically deform owing to the clamping force. The joint strength reached its maximum value at the third stage. The analysis demonstrated that the relative motion between the weld tip and the upper specimen predominantly affected the increase in joint strength.