Based on the investigation of the relationship between the are voltage and the are length in small current pulse TIG welding,a new are length sensing and control method has been put forward and realized with hardware circuits.

In order to solve the weld seam tracking problem in the pulse TIG welding process of some thin stainless steel workpiece with complicated curved surface,a high precision and rapidly responsing speed seam tracking method based on visual sensor has been developed in this paper.

Study on the arc tracking system of all-position pulsed TIG welding under high-pressure environment

The qualitative analysis is carried out on the behavior of the partial penetrated weld pool with welding current changing from pulsed peak value to base value during pulsed TIG welding.

Based on the experiment of twin-wire narrow gap welding in single pool mode by employing alternative pulsed arcs, the influences of welding parameters on the appearance of weld and welding process stability were investigated.

Lateral oscillation arc welding, high-speed-rotating arc welding, twin-wire welding, and ultra NGW(narrow gap welding) can all assure the fusion of side wall and improve the oppearance of weld in relatively small welding variables.

The hollow-axis motor drives the offset nozzle and rotates the arc on the tip of wire at high speed,so as to ensure enough penetration into the sidewalls in narrow gap welding.