Robotic TIG Welding

TIG welding thick to thin materials has not always been easy for an automated system. The introduction of Micro-Start technology allows for a low amperage starting (2 amps) on thin materials that automatically transitions to a high amperage for thicker materials. New digital communication technology on a robotic system can automatically adjust procedures based on the torch location as it weaves from thick materials (high amperage) to thin materials (low amperage) for automated, consistent penetration control.

Torch design has evolved dramatically. Smaller profile torches and improvement in the design of the gas diffusers and lenses which smooth out the shielding gas flow and allow for greater tungsten stickout can provide better access to tight joint configurations.

Production Monitoring software (web-based Production Monitoring 2 software now available for Lincoln Electric Power Wave welding power sources) can aid in weld data collection and is designed to allow fabricators to analyze and improve their welding operations and processes. It also aids in meeting ISO, Six Sigma, statistical process control (SPC), quality cost delivery (QCD), overall equipment effectiveness (OEE), and lean manufacturing efforts.

Conclusion

Numerous aviation repair and overhaul organizations, small and large, regularly use TIG welding processes in their daily activities — and this will not change. However, in a high-repetition production setting, or a small-batch maintenance setting, the best way to determine if your company can benefit from robotic TIG welding is to consult with a manufacturer. Manufacturers can review your prints or apply a robot to your own actual parts for a no-charge productivity improvement analysis. Application engineers analyze your current welding processes and procedures and then propose improvements to provide the best return on investment and increase productivity and quality control for your shop floor. AMT

This article was provided by The Lincoln Electric Company. The company will showcase its welding equipment at EAA AirVenture, Booths 49-51. More information is available at www.lincolnelectric.com.