This Pneumatic C-Frame Portable Spot Welder is a mobile welding solution engineered for applications demanding high rigidity and precise pressure control. Its defining feature is a unique integrated C-frame gun structure, which offers superior mechanical stiffness and resistance to deflection during welding compared to traditional suspended designs. This ensures electrode force is applied accurately and perpendicularly to the workpiece, significantly improving nugget consistency. The system integrates the welding power source, pneumatic-hydraulic booster, intelligent cooling, and controller into a mobile unit. An operator can effortlessly maneuver the gun via a balancer arm to access various points on the workpiece. It is particularly suited for scenarios requiring stable welding force and high positional repeatability, such as automotive component repair, structural reinforcement spot welding, and flexible, low-volume, high-mix production.

• Integrated C-Frame for High Rigidity: The welding gun features a monolithic C-frame construction for exceptional robustness and minimal deflection during welding. This provides a stable pressurizing path for the electrodes, forming the physical foundation for high-precision, high-strength spot welding, ideal for multi-layer sheets and projection welding.

• Programmable Four-Stage Force Control: The work cycle consists of independently programmable Squeeze, Weld, Hold, and Off stages. The intelligent controller ensures high welding current is only triggered after the preset electrode force is achieved, enabling precise synchronization of force and current to eliminate weak welds.

• Integrated Pneumatic-Hydraulic Drive & Cooling: Incorporates a pneumatic-hydraulic booster cylinder to deliver stable, high welding force using standard plant air. An efficient internal recirculating water cooling system continuously chills the transformer, thyristors, and electrodes, ensuring stability and longevity during prolonged operation.

• Ergonomic Mobility & Operation System: A balancer suspension with a swivel mechanism provides "zero-gravity" handling of the heavy welding gun, dramatically reducing operator fatigue. The control handle integrates the start switch, offering an intuitive and user-friendly interface.

• Programmable Multi-Mode Welding Capability: The controller supports storage and recall of multiple parameter sets, enabling execution of various complex processes including standard spot welding and multi-pulse welding (for thick plates or aluminum), meeting the welding needs of materials ranging from mild steel to high-strength steel and galvanized sheets.