步进式电弧螺柱焊中螺柱送进深度的自动控制

在分析螺柱送进过程的基础上,对步进式电弧螺柱焊过程中螺柱送进深度的控制问题进行了研究。以焊接过程中螺柱与工件之间的相对位移为控制量,采用位移传感器检测螺柱送进过程中焊枪弹簧压缩位移,以此获知螺柱与工件之间的接触状态,实现对螺柱送进深度的控制。试验结果表明,步进式电弧螺柱可以实现螺柱送进深度的自动控制,无需在焊前预先设置螺柱送进深度;采用不同螺柱提升高度进行焊接时,控制系统可以做出相应的调整,保证合适的螺柱送进深度。将此方法用于螺柱穿透焊,能够有效减小间隙对焊接过程的影响,保证焊接过程的顺利实现。

AUTOCONTROL OF STUD PLUNGE DEPTH IN STEPPING ARC STUD WELDING

With the analysis of the stud plunge process, the control of stud plunge depth in the stepping arc stud welding is studied. The relative displacement between the stud and the workpiece during welding process is acted as the controlled variable. Through the acquisition of the compression displacement of spring in the welding gun by displacement sensor, the contact state between the stud and the workpiece is gained. Based on that, the control of stud plunge depth is realized. It is indicated from the test results that the autocontrol of stud plunge depth can be realized in stepping arc stud welding. The stud plunge depth need not be preset before welding. When the different stud lift heights are adopted in welding, the corresponding adjustment can be done by the control system to guarantee the adaptive stud plunge depth. That adopting the control method of stud plunge depth in penetration welding decreases the effects of gap on welding process, which ensures the trouble-free realization of penetration welding.