CO_2焊机在使用中常常出现粘丝现象,即在焊接完毕停焊时,焊丝往往会粘在焊缝上,影响焊接质量,也增加焊工的劳动强度,因而不可避免地要影响生产效率。为此我厂对天津产 NBC—200CO_2焊机作了自动断丝技术改造。实现自动断丝功能的原理是:在焊接结束时,先停送丝电机,经过一段时间延迟之后, CO_2 welder often appear in the use of sticky wire phenomenon, that is, in the welding stop welding, the wire will often stick to the weld, affecting the quality of welding, but also increase the labor intensity of the welder, which will inevitably affect the production efficiency. To this end I plant Tianjin NBC-200CO_2 welding machine made automatic broken wire technology. Automatic broken wire to achieve the principle of function is: at the end of the welding, the first stop wire motor, after a period of delay,