When we first looked at this robotic welding application, the productivity side was already well taken care of. The robots were doing their job efficiently and consistently.
The concern was what was happening around them.
Robotic welding can generate a significant amount of fine metal fumes, and because the process runs continuously, those fumes can build up quickly if the extraction system is not designed properly. For us, the objective was not simply to install a dust collector. We had to make sure the fumes were captured where they were generated and moved through the system reliably.
How We Approached the Weld Fume Extraction system
The first thing we focused on was source capture.
In my experience, this is where many weld-fume systems go wrong. You can have a good dust collector and a powerful fan, but if the hood is not positioned correctly or the airflow at the welding point is inadequate, the fumes will still escape into the work area.
We therefore looked at the hood arrangement, airflow requirements, duct routing and the pressure losses across the complete system.
The centrifugal fan was selected based on the actual system requirement, not just the airflow requirement. It had to provide sufficient airflow while also overcoming the resistance created by the hoods, ductwork and dust collector.
Key Consideration was the Filtration
Welding fumes contain very fine particulates, so the dust collector had to be selected specifically for this application.
We considered the expected dust loading, filtration requirements and operating conditions before finalising the collector. The idea was to ensure that the system could handle the welding process continuously without making filter performance an afterthought.
We also paid attention to what happened after filtration. Depending on the application and applicable requirements, the cleaned air had to be either safely discharged or recirculated through a properly designed arrangement.
What We Delivered
We handled the project as a complete weld-fume extraction system rather than supplying individual pieces of equipment.
Our scope included:
- Source-capture hoods
- Welding-fume dust collector
- Centrifugal exhaust fan
- Ductwork
- Controls and accessories
- Installation
- System commissioning
What I Took Away From the Project
The biggest takeaway for me was simple, weld-fume extraction is a system design problem, not a dust collector selection exercise.
The fan, hood, ductwork and collector all have to work together. If one part is incorrectly selected, the performance of the entire system can suffer.
That is how we approach projects at Atmax Filtration, we look at the complete application, understand what is happening on the shop floor, and then engineer the extraction system around the actual process.
From engineering and equipment selection to installation and commissioning, our focus is on building a system that works reliably in the real operating environment.