Stainless Steel TIG Welding Workstation

This workstation is specifically designed to meet the core welding requirements for high-purity stainless steel pressure vessels in the pharmaceutical, food, and fine chemical industries. It is dedicated to welding critical components such as longitudinal and circumferential seams of the cylinder body, heads, and nozzles. The base materials are 304 and 316L stainless steel, with a plate thickness range of 3 to 12mm. It employs a fully automatic pulsed TIG single-sided welding with double-sided formation process, using ER308L and ER316L low-carbon stainless steel solid wires, and is equipped with 99.999% high-purity argon gas for front protection and backside shielding or internal argon gas protection.

Project Challenges: Achieving high-quality single-sided welding with double-sided formation, where the backside weld bead must be smooth and free of oxidation without a backing. This requires millimeter-level precision control of arc heat input, molten pool behavior, and backside shielding gas. Any parameter fluctuation can lead to backside weld bead depression, incomplete penetration, or oxidation and blackening.

Project Highlights and Breakthroughs: Real-time precise control of dynamic welding torch orientation: Throughout the welding process, the robot not only moves along complex curves but also maintains the optimal orientation (tilt angle) and angle relative to the weld seam (working angle, travel angle) of the welding torch. The system ensures that the arc is always aligned with the fusion line and automatically adjusts parameters in different quadrants (such as uphill and downhill positions). It has overcome the problem of molten pool flow and uneven weld beads caused by position changes in intersecting line welding, achieving consistent weld formation throughout all positions and cycles, with quality stability far exceeding that of top welders.

Solving Customer Problems: It has completely replaced traditional manual welding or inefficient double-sided welding processes, eliminating the waste of time and materials caused by backside root cleaning, grinding, and secondary welding. The first-time welding pass rate is over 99.8%, with both internal and external weld quality meeting the highest industry standards. Production efficiency has increased by more than 200%, significantly reducing the customer's overall production costs and quality risks.