Automating a useful subassembly can be a stronger first project than trying to automate every weld on the finished product. The correct boundary captures meaningful recurring work without concealing additional handling or the final welding that remains outside the cell.
In this Article
- Find the repeat work inside the finished product
- Compare two levels of scope
- A route comparison for a fabricated product
- Worked example: a common bracket across three models
- Check the handoff to the next operation
- Keep the first project accountable
Find the repeat work inside the finished product
Identify assemblies that appear across multiple models or return regularly in production. Ask which have stable joints and a clear point in the manufacturing sequence.
The purpose is not to select the easiest possible sample. Choose a subassembly that represents meaningful work. Automating a convenient but insignificant weld may produce a good demonstration without addressing the department's actual demand.
Compare two levels of scope
A complete-product approach may require more reach, positioning, and coordination. A subassembly approach may offer a narrower review but leave final welding elsewhere. Both arrangements can be valid, depending on the application.
Robotic arc welding is a system-level process. Compare the proposed production routes, including work transferred between stations, rather than treating the robot's portion as disconnected from the rest of manufacturing.
A route comparison for a fabricated product
| Route stage | Subassembly automation concept | Full-product automation concept |
|---|---|---|
| Initial components | Presented to a defined subassembly setup | Prepared for a larger assembly route |
| Robotic work | Named recurring subassembly welds | Named welds across the larger product |
| Later work | Final assembly and any remaining seams | Any welds or tasks outside the larger scope |
| Main comparison | Useful repeat workload versus added transfers | Broader coverage versus greater application scope |
This is a scope framework, not a claim that either route has a lower cost for every product.
Worked example: a common bracket across three models
Imagine three product models sharing the same welded support bracket. Final assembly differs substantially, but the bracket is a recurring standalone operation. Reviewing the bracket as a family can create a defined first workload without solving every model-specific final weld.
The benefit depends on that bracket representing meaningful demand. A trivial repeated weld does not become a strong investment simply because it appears on many drawings. Count the actual work and the requirements of the complete route.
Check the handoff to the next operation
Ask whether the automated subassembly fits the downstream assembly method and acceptance requirements. If the proposed route introduces extra transfers, storage, or a second setup, include them in the comparison. Savings inside the cell should not be assessed while ignoring extra work outside it.
Keep the first project accountable
Define success in terms of the chosen subassembly's accepted output and operational role. Future products can be evaluated later, but the initial case should not depend entirely on unspecified expansion. Where the bracket geometry is constrained, seven-axis access can be examined within that clear boundary.
Related Reading
- How to Pick the First Part for 7-Axis Cobot Welding
- Cobot Welding for Fabricated Steel Production: What Makes a Strong First Application
Discuss Your Welding Application
Works Cited
TWI. "Robotic Arc Welding." TWI, https://www.twi-global.com/technical-knowledge/job-knowledge/robotic-arc-welding-135. Accessed 14 Sept. 2026.