Control of Gas-Metal-Arc Welding Using Arc-Light Sensing

摘要

In this development of closed-loop control of the gas-metal-arc welding processusing light emitted by the arc, two process parameters were controlled in real time: arc length and droplet-transfer frequency. An arc-length sensor and controllers to regulate arc length and to actuate welding current were developed. The transfer frequency depended on current, wire-feed speed, and electrode extension, these results led to the design of a transfer-frequency controller.