Fillet Welding Carriage & Corner Welding Tractor | H-Beam & Box Beam Automatic Fillet Welding

Fillet welding carriage welding horizontal seam on H-beam

Corner fillet welding carriage on vertical H-beam web

Fillet welding carriage welding vertical seam on I-beam

Ride the Corner. Double the Torch.

Made for steel structure fabrication: H-beams, box beams and welded frames. The carriage walks the corner joint directly — no track needed — with single-torch and dual-torch models covering fillet welds from 400 to 800 mm.

Ideal for steel structures, H-beams, box beams and frames
Walks the fillet joint directly — rubber-wheel (JJ) and magnetic steel-wheel (GJ) drive
Dual-torch versions weld two seams in one pass (400–800 mm range)
Swing width 0–32 mm, swing angle 0–30°
Intermittent welding supported on single-torch models

Request JJ/GJ Series Quote

Watch It Work

Application Videos

Corner carriage — fillet welding on structure

Corner carriage — H-beam / box beam fillet

Specifications

JJ / GJ Series Technical Data

Item	Specification
Carriage model	JJ-III-Q1/J (angle swing, trackless)
Drive mode	Rubber-wheel drive with internal permanent magnets
Welding speed	0–990 mm/min (digital display)
Minimum suction thickness	4 mm (magnetically permeable material)
Minimum travelling outer diameter	3000 mm (outside of shell)
Minimum travelling inner diameter	2900 mm (inside of shell)
Carriage dimensions (L×W×H)	308 × 260 × 288 mm
Carriage weight	9.2 kg
Swing mode	Angle swing
Swing angle	0–30° (digital, simulated value)
Swing speed	0–2700 mm/min
Dwell time left / right	0–4 s each
Centre offset compensation	360° rotation adjustment on the angle oscillator
Torch adjustment — vertical	65 mm (vertical slide)
Torch adjustment — horizontal	140 mm (main unit left/right rail)
Oscillator rotation	±60°
Torch nozzle travel angle	±25°
Magnet wheel tolerance	Permanent magnets keep full strength below 300 °C; the magnet arrangement does not affect the weld
Fillet width coverage (dual-torch versions)	400–800 mm web-to-flange fillet welds
Standard configuration	Carriage ×1 · Gen-III power unit ×1 · Gen-III angle oscillator · Two-axis adjustment assembly · Universal torch fixture ×1 · Tool kit ×1 · Documents ×1 · Packaging ×1

Options & Customization

GJ steel-wheel versions for scaled or heavy sections
Q2 dual-torch versions — both fillets of a beam welded in one pass
CZ-III-Q1 side-mount carriage for corners where the carriage cannot sit over the joint
Battery power pack, TIG / plasma / flame-cutting torch adapter, intermittent welding controller

Download the Datasheet

Full technical data for this machine in a printable English PDF — specifications, configuration and options. Hand it to your engineering team.

Download Datasheet (PDF)

Values are taken from the product operation manual. Custom configurations — track length, torch fixture, dual-torch setup, expanding-head size — are quoted to your workpiece.

Naming guide: JJ-III-Q1 = rubber-wheel corner welding · GJ-III-Q1 = steel-wheel corner welding · "Z-W" = straight swing, "J-W" = angle swing · Q2 = dual-torch version · "/W-W" = non-oscillating entry model with fixed torch.

CZ-III-Q1/J-W side-mount version carries the torch beside the carriage body — it reaches corner joints where the carriage cannot sit directly over the seam.

Model	Drive	Torch	Swing
JJ-III-Q1/Z-W	Rubber wheel	Single	Straight swing
JJ-III-Q1/J-W	Rubber wheel	Single	Angle swing
JJ-III-Q2/J-W	Rubber wheel	Dual	Angle swing
JJ-III-Q1/W-W	Rubber wheel	Single	No swing (fixed torch)
CZ-III-Q1/J-W	Rubber wheel · side-mount	Single	Angle swing
GJ-III-Q1/Z-W	Magnetic wheel	Single	Straight swing
GJ-III-Q1/J-W	Magnetic wheel	Single	Angle swing
GJ-III-Q2/J-W	Magnetic wheel	Dual	Angle swing

FAQ

Questions Engineers Ask About This Machine

Does the fillet carriage need a track?

No. The JJ rubber-wheel carriage carries permanent magnets inside the wheel assembly and runs directly on the workpiece. It is the fastest machine to reposition in a structural shop — no rails, no clamps, no scaffolding. It does require magnetically permeable material (carbon steel, Cr-Mo steel, low-alloy steel).

How wide a fillet can a dual-torch model cover?

Dual-torch versions (Q2) weld both fillets of a beam simultaneously and cover web-to-flange fillet widths from 400 to 800 mm. One pass does what used to take two setups, and both sides get the same parameters — the usual reason fabricators move to a dual-torch machine.

Will the magnets affect my weld quality?

No. The magnet structure and pole arrangement are designed so the magnetic field does not influence the arc or the weld. The wheels keep full magnet strength below 300 °C, so there is no fade from heat during normal production. Magnetism also means no wear parts to replace like a belt or rail.

Can it weld stainless steel, or run TIG and plasma?

For non-magnetically-permeable material such as stainless steel, a matching fixture is required so the carriage has something to grip. All controls use interference-resistant design, and the torch fixture accepts TIG torches, plasma cutting and flame cutting heads — clamp the nozzle in the fixture and go.

What is the minimum workpiece diameter for curved work?

Minimum travelling outer diameter is 3000 mm and minimum travelling inner diameter is 2900 mm, so the carriage works on large shells and vessels as well as flat beams. Welding speed runs 0–990 mm/min and the carriage weighs 9.2 kg.

Where It Works

Applications for the JJ / GJ Series Fillet

Machines are specified by weld type and workpiece, not by catalogue page. See how this series is used in real fabrication work:

Steel Structure WeldingFillet welds on H-beams, box beams, columns and frames. Shipbuilding WeldingHull and deck panel long seams, vertical and horizontal butt seams. Storage Tank WeldingShell long seams, vertical seams, circumferential seams and tank roofs. Boiler WeldingDrum circumferential seams, tube panels and header welds.

Corner / Fillet Welding Carriage — JJ & GJ Series