脉冲频数对pulsed DE-GMAW焊缝成形的分析

发布时间：2018-05-26 10:45

本文选题：脉冲旁路耦合电弧焊 + 峰值脉冲　；参考：《焊接学报》2017年06期

【摘要】：针对脉冲旁路耦合电弧焊(pulsed DE-GMAW)焊接过程中熔滴过渡和焊缝成形控制难题,基于高速摄像等在内的硬件系统和x PC的快速原型软件系统构成的试验系统,对不同的脉冲数量对熔滴过渡和焊缝成形的影响进行了分析.结果表明,在主路电流不变的情况下,随着双脉冲旁路电流的峰值脉冲数增加,自由过渡的次数增加;随着双脉冲旁路电流的基值脉冲数增加,短路过渡的次数增加.但较多的短路过渡次数会导致焊接过程不稳定,产生较大飞溅.在此基础上,确立了双脉冲旁路电流的双脉冲峰值脉冲数与基值脉冲数匹配来控制熔滴过渡方式,因此获得较好的焊缝成形.
[Abstract]:Aiming at the problems of droplet transfer and weld forming control in pulsed DE-GMAW (pulsed arc welding) welding process, the test system based on high-speed camera and the rapid prototyping software system of x PC is developed. The effects of different pulse numbers on droplet transfer and weld formation are analyzed. The results show that the number of free transitions increases with the increase of the peak pulse number of the double pulse bypass current and the number of short circuit transitions with the increase of the basic pulse number of the double pulse bypass current. However, more short-circuit transition times will lead to unstable welding process, resulting in large spatter. On this basis, the matching of double pulse peak pulse number with basic pulse number is established to control droplet transfer mode, so better weld formation is obtained.
【作者单位】：兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室;
【基金】：国家自然科学基金资助项目(51205179) 兰州理工大学红柳青年资助项目(Q201202)
【分类号】：TG444.72

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