SYSTEM AND METHOD FOR DELIVERING NEGATIVE POLARITY CURRENT TO RELEASE GAS FROM A WELDING PUDDLE

摘要

The invention described herein generally pertains to a system and method related to reducing magnetic arc blow and steering the arc with two or more ground connections on the workpiece. The invention employs an AC switch component that is configured to activate one of the two or more ground connections to complete an electrical connection via the arc between the electrode and the workpiece. The activated ground connection can be used to counteract a buildup of magnetic field due to arc blow. Moreover, AC switch component can be configured to manipulate a direction of an arc based on activated a ground connection. In addition, AC switch component can oscillate between two or more ground connections to agitate a puddle formed by an electrode to release gas from the puddle and reduce porosity of a resulting weld.

主权项

1. A welder system, comprising:
a power source that creates an arc between an electrode and a workpiece; a gas that shields the arc; a puddle that is formed by the electrode; two or more ground connections in electric connectivity with the workpiece; an AC switch component that is configured to activate one of the two or more ground connections to complete an electrical connection via the arc between the electrode and the workpiece; and the AC switch component is further configured to oscillate a ground connection to complete the electrical connection between the two or more ground connections which agitates the puddle and releases gas from the puddle to reduce porosity in a weld created by the puddle.