Patent ID: 8513569
Filing Date: 2013-08-20
Classification: B23K

Abstract:
1. A drawn arc welding process comprising the steps of: providing a work piece; providing a welding tool holding a metal object onto the work piece; providing a power supply outputting a preset current; providing an arc voltage sensing device; lifting the metal object and drawing a pilot arc current; energizing a welding current locally melting the metal object and forming a weld pool in the work piece; measuring an arc voltage; accumulating an arc energy; predicting the arc voltage for a remaining time of the welding process; calculating the time of the remaining welding process so that the sum of the accumulated arc energy and remaining arc energy equal to a desired energy set point; plunging the metal object into the locally melted work piece forming a weld between the metal object and the work piece to achieve the calculated time of the remaining weld.