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论述了 Ｃ Ｏ２ 短路过渡过程及波形控制的基本概念， 针对熔滴过渡过程中的不同阶段， 利用 Ｉ Ｇ Ｂ Ｔ逆变弧焊电源动特性好， 响应速度快 （小于１ ｍ ｓ） 的优势， 分别对燃弧和短路， 尤其是短路全过程施加合理的控制信号， 在输出端得到符合工艺要求的焊接电流波形， 从而控制焊接过程的飞溅、焊丝的熔化、熔滴的过渡及焊缝的成形。简要介绍了基于上述理论设计的时代集团公司 Ａ１２０５００ 气保护焊机， 该机输出电流范围５０～５００ Ａ， 输出电压范围１５～４５ Ｖ， 完全适应０８～１６ ｍ ｍ 实芯钢焊丝的全位置焊接要求。
In this paper, the basic concepts of C O2 short circuit transition and waveform control are discussed. In view of the different stages during the droplet transfer, the advantages of I G B T inverter arc welding power source with good dynamic characteristics and fast response (less than 1 m s) Respectively, the arc and short circuit, especially short circuit the whole process of applying a reasonable control signal obtained at the output of the welding current waveform in line with the process requirements, and thus control the welding process splash, wire melting, droplet transfer and weld formation . The A120500 gas shielded welder based on the above theory is briefly introduced. The output current range is 50 ~ 500 A and the output voltage range is 15 ~ 45 V, which fully meets the requirements of 018 ~ Core steel wire all-position welding requirements.