The ground‑rail welding workstation, also known as 7th‑axis robotic ground track welding system, is engineered for automatic welding of over‑sized structural workpieces such as H‑beams and box beams. A 6‑axis welding robot is mounted on precision floor‑mounted linear track. Acting as external 7th axis, the ground rail synchronizes with robot motion to break the reach limit of fixed robotic cells and realize continuous long‑seam welding in one pass.

This workstation consists of 6‑axis welding robot, high‑precision ground‑rail travelling mechanism, servo‑driven rack‑and‑pinion unit, welding power source, water‑cooled welding torch, arc seam‑tracking sensor and electrical control cabinet. Customizable rail length ranges from 6 m to 16 m with maximum travelling speed of 20 m/min and ±0.1 mm repeat positioning accuracy. Dual‑station layout on both sides of track allows loading‑unloading while welding for higher uptime. Automatic lubrication module ensures reliable long‑term operation.

Supporting MIG/MAG and TIG welding processes, the system adopts arc‑tracking technology to compensate assembly tolerances for fillet welds and multi‑layer multi‑pass welding. It is widely applied for steel‑structure beams, construction machinery frames, rail‑transport components and ship sub‑assemblies. Heavy workpieces no longer require frequent hoisting and flipping. Uniform bead formation lowers rework rate.

Modular design simplifies on‑site commissioning. Configurations include single‑robot single‑rail or dual‑robot shared‑rail modes. It eases the shortage of skilled welders and improves workshop working conditions with long service life, serving as a flexible automated welding solution for heavy‑duty manufacturing.