When manufacturing large steel structures, offshore equipment and large‑bore valves, ultra‑long weld seams and oversized workpieces often restrict factory output. Conventional single‑robot gantry equipment delivers slow cycle speed, while manual welding struggles with thermal deformation and the shortage of senior welders. The dual‑robot gantry welding workstation builds an integrated automated welding solution for heavy‑duty parts. Two welding robots are installed on a travelling heavy‑duty gantry frame. Long‑travel ground rails extend working zones, and dual‑robot coordinated operation meets mass‑production demands for heavy components.

This workstation consists of heavy‑duty gantry frame, long‑stroke ground rails, dual‑robot units, synchronous motion control system, laser seam‑tracking module, welding power sources, safety guarding and HMI control cabinet. The twin robots can weld symmetric seams on both sides of workpieces simultaneously or process separate zones independently. Built‑in anti‑collision logic avoids path interference and guarantees reliable continuous long‑hour production. Supporting MIG/MAG, TIG and plasma cladding, it handles structural welding for box girders, bridge steel units and offshore frames, as well as alloy cladding reinforcement for sealing surfaces of large ball valves, butterfly valves and nuclear‑grade valve bodies.

Synchronized dual‑robot welding generates balanced heat input to mitigate thermal distortion of large weldments and cut post‑weld correction and rework, bringing significant productivity improvement over single‑robot gantry systems. Laser seam‑tracking captures assembly gaps and clamping offset in real‑time and adjusts welding trajectories automatically. Saved process recipes can be reused to ensure highly consistent weld quality and reduce welding defects during mass production. Only one operator is required for supervision to ease labour‑recruitment pressure. Enclosed barriers isolate arc flash and welding fume for a safer workshop environment.

Gantry span and rail travel length can be customised according to actual workpiece dimensions to fit various site conditions. Full turn‑key service covers on‑site installation, commissioning and hands‑on training, helping heavy‑industry manufacturers break large‑part welding bottlenecks and achieve cost reduction, quality improvement and higher efficiency.