| 摘要: |
| 波形控制方案是实现短路过渡CO2气体保护焊焊接质量的关键.针对目前常用的恒流波形控制方案焊丝干伸长适应能力差和恒压波形控制方案燃弧后期熔滴排斥作用明显,容易产生瞬时短路的不足,提出了一种新的波形控制方案-自然波形控制方案.该方案根据短路过渡时间和空间的不同,自动调整波形控制参数,在燃弧期间和短路期间都采用斜率控制方式,减少熔滴的排斥作用,实现熔滴与熔池的自然接触短路.结果表明,自然波形控制方案具有促进熔滴与熔池发生自然接触短路,熔滴过渡规律性强,焊接飞溅小,燃弧能量高的特点. |
| 关键词: 熔化极气体保护焊 数字控制系统 短路过渡 波形控制 |
| DOI： |
| 分类号: |
| 基金项目:南京理工大学博士科研基金资助项目(AB41941) |
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| The new type of low spatter and high energy waveform control technology for short-circuiting welding |
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FENG Yuehai1, LIU jia2, YIN Shuyan2, WANG Kehong1
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1.Department of Materials Science & Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;2.College of Mechanical Engineer and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China
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| Abstract: |
| The waveform control project is the key of realizing better control for CO2 short-circuiting welding.For the shortage of extension adaptability for constant-current waveform control project and the higher probability of transient short circuit occurring due to the bigger repulsion effect of droplet in arcing evening for constant-voltage waveform control project, a new waveform control method, NWC(natural waveform control), is brought forward.In order to reduce the repulsion effect of the droplet and realize the natural short circuiting transfer, the method not only adopts slope control mode in arc period and short-circuiting period, but also can automatically module waveform control parameters with the time and space information for short circuit welding.The experiment results validate the NWC project has the characteristics of improving the natural short circuit transfer, good regular waveform control effect and better arc stability. |
| Key words: gas metal arc welding digital control systems short-circuiting transfer waveform control |
