Part quantity alone is a poor threshold for welding automation. Convert demand into the work the proposed cell would perform, then compare it with the available production time. Ten substantial weldments can represent more welding than hundreds of short brackets.
In this Article
- Count welding demand, not only pieces
- Separate sustained demand from short peaks
- A demand calculation with two different parts
- Check both the ordinary and peak release
- Define the requirement before choosing a category
Count welding demand, not only pieces
Estimate the recurring welding hours associated with each part family. Include the frequency of orders and the weld coverage intended for automation. A quantity forecast becomes useful when connected to the work the proposed cell would actually perform.
Do not assume that every current labor hour becomes an automated hour. Loading, preparation, and any remaining manual seams still belong in the production plan. This distinction keeps the opportunity from being overstated.
Separate sustained demand from short peaks
A product that runs continuously creates a different investment case from a large order that appears once. Both may be worth reviewing, but they do not justify the same utilization assumption.
Prepare a normal-week scenario and a busy-week scenario. Then ask what happens between major orders. Will the cell support another approved family, or will its intended workload temporarily disappear? This is especially important when the business case rests on a new customer forecast.
A demand calculation with two different parts
For illustration, Part A has 400 units per week with one minute of candidate welding each. Part B has 60 units with ten minutes each. Part A represents 400 minutes of candidate welding; Part B represents 600. The lower-volume part has the larger welding workload in this example.
These values are invented to explain the method. They are not robot cycle estimates. Current candidate welding time establishes the scale of the opportunity; a proposed cell's complete cycle must be assessed separately.
| Workload measure | Simple calculation | Meaning |
|---|---|---|
| Current candidate welding | Quantity multiplied by relevant manual welding time | Scale of the work under consideration |
| Proposed production demand | Quantity multiplied by proposed complete cycle | Time the proposed route would require |
| Available production time | Scheduled time less known unavailable time | Time realistically available to serve demand |
Do not mix these three quantities. A current manual workload cannot simply be subtracted from a robot's rated operating hours to produce a savings claim.
Check both the ordinary and peak release
Weekly demand can hide a customer requiring the whole quantity in one day. Conversely, a peak order may be spread across several weeks. The delivery pattern changes the capacity requirement without changing annual volume.
Map the required release schedule against available production time. Include other approved work assigned to the same cell. This creates a useful basis for comparing cobot and conventional arrangements under the same conditions.
Define the requirement before choosing a category
The question becomes whether a proposed configuration can serve a specific workload and delivery pattern, rather than whether the shop crosses a universal part-count boundary. Use that requirement to evaluate the complete method, including weld access, loading, and any remaining manual work.
Related Reading
- Cobot Welding for Production Runs: What Shops Should Prepare First
- Repeat Production Welding: When a Cobot Welding Cell Makes Sense
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.