| 摘要 |
PURPOSE:To improve the groove profiling accuracy in welding by moving an electrode in a groove width direction based on the variation of an arc voltage, etc. and further by moving it in the center axial line direction based of the integral value of the variation. CONSTITUTION:An arc voltage detector 6 is provided and an integrator 14, reference voltage setter 17, the phi setter 20 of an electrode and (n) setter 21 are arranged. The detected arc voltage E is fed to a peak voltage position setter 10 and integrator 14. The setter 10 detects the maximum value Etheta of the arc voltage and inputs it to a memorizer 11 as well and a X axis driver 12 moves a nozzle in the groove width direction. The nozzle is moved in the shaft center direction by a Y axis motor 19 so as to make the difference between the integral value Scf operated by the integrator 14 and the reference set voltage E0 zero. With this method, the groove profiling accuracy in welding is increased. |
