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Robot-carried gun
The welding gun is mounted on the robot, which moves from spot to spot around a part held in a fixed fixture.
Robotic spot welding cells
We build robotic spot welding cells that place every weld on sheet metal and body parts with the same force, current and position.
Definition
What is robotic spot welding?
Robotic spot welding (resistance spot welding) is the use of a robot to join overlapping sheet metal parts by clamping them between two electrodes and passing an electric current through a single point. The robot brings the welding gun to every spot at the same angle and position, while the weld controller keeps force, current and weld time identical at each spot.
A spot welding cell typically consists of a high-payload robot, a servo or pneumatic welding gun, a weld controller, an electrode tip dresser, a cooling water unit and a part fixture. The robot can carry the gun, or it can pick up the part and present it to a stationary gun.
Automotive suppliers join body parts, brackets and reinforcements this way, and appliance manufacturers use it for cabinets and panels. Because the weld data for every spot is logged, the process is also fully traceable.
Cell types
The spot welding solution that fits your production
We define the cell layout with you based on part size, number of spots and line speed.
Robot-carried part
The robot picks up the part and presents it to a stationary welding gun, shortening the cycle for small and medium parts.
Servo welding gun
Electrode force and closing speed are set in the program, giving more stable welds across different sheet thicknesses.
Electrode maintenance
Automatic tip dressing and electrode changing keep weld quality steady throughout the shift.
Multi-station cells
With a turntable or two stations, the robot keeps welding while the operator loads the next part.
Weld data and traceability
Current, force and time are logged for every spot, and out-of-range welds are flagged.
Benefits
What robotic spot welding brings to production
Results that vary from operator to operator in manual spot welding become identical on every part with a robot.
- Consistent weld qualityEvery spot is placed with the same position, force and current, and no spot is missed.
- Short cycle timeThe robot moves quickly and continuously between spots.
- Relief from heavy workOperators no longer carry heavy welding guns by hand or suffer repetitive strain.
- Less scrapWeld control and electrode maintenance reduce weak or burnt spots.
- Traceable productionWeld data is stored per part and is ready for quality audits.
Areas of use
Where is robotic spot welding used?
It is most efficient in series production of sheet metal parts joined with many weld spots.
Automotive suppliers
Body parts, brackets, reinforcements and seat frames.
Home appliances
Cabinets, panels and inner sheet metal housings.
Sheet metal fabrication
Cabinets, enclosures and box-type sheet metal products.
Agricultural and construction machinery
Cab, guard and body panels.
Electrical enclosures
Panel enclosures and mounting plates.
Upgrading existing lines
Replacing the robot, gun and weld controller in older spot welding cells.
Should I choose a servo gun or a pneumatic gun?
With a servo gun, electrode force and closing speed are set in the program, which gives more stable results on different sheet thicknesses and coated steels and also shortens the cycle time. For a single part type and a lower investment target, a pneumatic gun may be enough. We make the choice together based on your part list and line speed.
How often are electrode tips replaced?
Tips flatten with use and weld quality drops. An automatic tip dresser in the cell reshapes the tips after a set number of spots, and fully worn tips are replaced on schedule. This keeps quality steady throughout the shift.
Can we move our manual spot welding to a robot?
In most cases, yes. We review your parts, spot locations and existing fixtures, then design a layout the robot can reach and new fixtures where needed. Simulation shows you the cycle time before installation.
Woirtech
Let us strengthen your production together
Share your application and goals, and together we will define the right robot cell, layout and investment plan for you.
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