Automated Multi-Point Resistance Welding System for Metal Door Manufacturing — Gantry Frame, Synchronous Multi-Head, Galvanized Steel Capable

Door panel production involves welding multiple reinforcement ribs or edge profiles onto a large galvanized steel sheet. On a standard single-gun spot welder, the operator must manually position the panel, weld one point, reposition, weld the next, and repeat — dozens of times per door. Each manual reposition introduces weld spacing inconsistency. Each single-point cycle adds seconds that multiply into minutes per door. At hundreds of doors per day, this bottleneck defines the production line's ceiling.

This Xinwei gantry multi-head resistance welding system is purpose-built to break that bottleneck. The gantry frame spans the entire door panel. Multiple welding heads, positioned according to the door's reinforcement layout, press and weld simultaneously in one cycle. The operator loads the panel, starts the cycle, and removes the finished door. Every reinforcement point is welded with identical parameters and spacing. The result is consistent structural integrity from the first door of the shift to the last, at a throughput that single-gun welding cannot match.

Every Xinwei gantry system undergoes pre-delivery testing with actual door panel samples. We verify:

• Weld nugget consistency across all electrode positions on the panel
• Panel flatness before and after welding to confirm minimal thermal deformation
• Pull-out strength testing on welded reinforcement points
• Galvanized coating integrity at and around weld zones

This is not a standard-configuration machine. Xinwei engineers work with your door panel design to configure: