Cobot Welding ROI: Real Numbers from 3 US Fabrication Shops

Before a shop invests $85,000–$120,000 in a cobot welding cell, they need real numbers — not manufacturer projections. We followed three VTM customers through their first 18 months of cobot operation and documented the actual results.

Shop 1: HVAC component manufacturer, Houston TX

This shop runs a steady mix of HVAC brackets, duct fittings, and equipment frames in 14–16 gauge galvanized steel. Before the cobot, two welders handled the repetitive bracket production while two others did custom work.

Result at 18 months: The cobot handles all bracket production — 120–140 parts per shift. One welder was reassigned to custom fitting work that was previously outsourced. The other was promoted to cobot supervisor and cell programmer. Payback achieved at 14 months.

Shop 2: Structural steel fabricator, Atlanta GA

Higher-mix, lower-volume work with a focus on steel frames and platforms. Initial concern: the cobot wouldn't be flexible enough for their part variety.

Reality: The shop identified a core set of 22 frame configurations that represented 65% of their weld hours. Those were programmed first. The cobot now handles those, while skilled welders focus on the custom work. Payback projected at 22 months.

Shop 3: Automotive parts supplier, Detroit MI

High-volume, repeat production — the ideal cobot scenario. 240 parts per shift, mild steel brackets and sub-assemblies. The cobot hit full production speed in week 3.

Result: Quality reject rate dropped from 1.8% to 0.3%. The cobot's torch angle and travel speed are consistent to ±0.05mm — something even experienced welders can't sustain across a full shift. Payback at 11 months.

What the numbers actually show

• —Average payback period across all three shops: 15.7 months
• —Quality reject rate improvement: 50–85% reduction
• —Welder retention: all three shops kept every welder employed — reassigned to higher-value work
• —Overtime reduction: average 40% reduction in overtime welding hours