method for automatic guidance of an arc schweißbrenners

摘要

The position of an electrode holder is adjusted w.r.t. a joint between two workpieces which are to be welded together. At least two characteristic quantities of the arc parameters are derived from the arco burning between the electrode holder and different regions of the sides of the joint. The characteristic quantities are mathematically coordinated and the result is compared with a control value which corresponds to the desired position of the electrode holder, and a control margin, which corresponds to the difference between the result of the calculation and the control value is used to position the electrode holder. The welding arc itself acts as a sensor determining the relative position between the electrode holder and the joint.