全位置TIG焊管机电弧长度自适应控制技术

Self-adaptation control technology of arc length for all-position TIG tube welding machine

采用微型计算机技术和逐次线性拟合算法确定了管-管环焊缝焊接中全位置平滑的电弧长度控制参数,通过对脉冲焊接电流期间的电弧电压进行实时采样,实现了全位置TIG焊管机的电弧长度自适应控制。控制系统动态响应速度快、调节精度高且工作性能稳定可靠。试验结果表明,焊缝熔宽均匀,表面成形美观。

The smooth control parameter of arc length for the all-position of tube girth welding is formed by the microcomputer technology and successive linear fitting arithmetic, for the purpose of realizing the self-adaptation control of arc length in all-position TIG tube welding machine, by real-time sampling arc voltage during pulse welding current period. And the control system has the advantages of high speed of dynamic response, high precise of adjustment, stable and reliable property of function. The experimental results show that the weld melt- width is even, and weld face shape is beautiful.