超声对等离子电弧的影响及焊接试验研究  

Effect of ultrasound on plasma arc and experimental research on welding

作　　者：范成磊[1] 谢伟峰[1] 杨春利[1] 林三宝[1] 孙清洁 范阳阳 

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,黑龙江哈尔滨150001 [2]哈尔滨工业大学(威海)山东省特种焊接技术重点实验室,山东威海264209 [3]东方电机有限公司,四川德阳618000

出　　处：《声学技术》2015年第1期29-34,共6页Technical Acoustics

基　　金：国家自然科学基金资助项目(51275134)

摘　　要：随着现代工业生产技术的发展,超声波在材料加工领域应用越来越广泛,相继出现了多种超声波与焊接相结合的方式,在一定程度上提高了焊接质量和生产效率,增强了焊接的适应性。详细介绍了一种超声电弧技术,即利用外加超声源调控等离子电弧作为相应热源进行焊接的技术。电弧试验研究显示,受超声调制的等离子电弧呈规则的圆锥形,压缩明显,电弧中心区压力增大。在焊接试验中,发现施加超声后,焊接熔滴尺寸更小,过渡频率明显增加,焊缝的熔宽和熔深都不同程度增加。利用该方法可以克服普通电弧焊接熔深浅、电弧能量不集中、焊接效率低等缺点。With the development of modern industry, the application of ultrasound in materials processing is getting more and more widespread and important. There are many ultrasonund- welding methods, all of those have improved welding quality and production efficiency to a certain degree, and enhance the adaptability of welding. An ultrasonic-arc technique, utilizing external ultrasonic source to regulate plasma arc（welding heat source）, is described in detail in this paper. The arc test shows that the shape of the arc modulated by ultrasound is conical instead of bell-shaped, and this compression effect is very obvious. While in the welding test, with ultrasound, the size of welding droplet is smaller than that without ultrasound, and the transition frequency is significantly increased. By using this method, some of the shortcomings in ordinary arc welding can be overcomed, such as arc energy divergence, the low quality of welds and low welding efficiency.

关 键 词：超声 等离子电弧 压缩效应 熔滴过渡 

分 类 号：TB559[理学—物理] TG456[理学—声学]