Gantry Welding Robots

Category Overview

Gantry welding robots integrate multi-axis overhead bridge structures with automated welding controllers to process large-format, heavy structural components. Unlike articulated arm robots restricted by reach limits, gantry systems utilize dual-side driven overhead rails to expand the longitudinal working envelope without sacrificing torch positioning rigidity. These systems accommodate structural workpieces exceeding 3 meters in width and 12 meters in length, applying continuous MIG/MAG, Submerged Arc Welding (SAW), or TIG processes across heavy plate assemblies.

Gantry Welding Robot For Large Workpieces
The Chuanglida Intelligent Equipment Gantry Welding Robot is engineered for structural fabrication of oversized components that exceed articulated arm reach. Built on a stress-relieved steel...

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Gantry Welding Robot For Structural Steel
The Borun Gantry Welding Robot is engineered for automated joining of heavy structural steel components, including H-beams, box columns, and bridge girders. Built on a rigid dual-side driven...

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Long-Span Gantry Welding System
The Long-Span Gantry Welding System automates continuous welding for oversized structural components where manual manipulation or standard-reach positioners fail. Built with a rigid structural...

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Large Gantry Welding Robot
The Boruntes Large Gantry Welding Robot is an industrial automated platform engineered for structural fabrication of oversized, heavy metal components. Built around a rigid overhead gantry...

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Dual-Robot Gantry Welding System
The Borunstech Dual-Robot Gantry Welding System integrates two independent or synchronized 6-axis industrial robots mounted on an overhead structural steel gantry bridge. Designed for workpieces...

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Single-Robot Gantry Welding System
The Single-Robot Gantry Welding System mounts a 6-axis articulated industrial robot onto an overhead dual-rail bridge structure. Designed to weld long, heavy, or bulky workpieces, this...

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Product Range

Model Series	Structure Type	Longitudinal Travel (X-Axis)	Transverse Span (Y-Axis)	Primary Welding Process	Target Applications
BRG-S Series	Single-Bridge Gantry	6,000 - 18,000 mm	2,000 - 5,000 mm	MIG/MAG, Flux-Cored Arc	Box columns, heavy beams, structural frames
BRG-D Series	Double-Bridge Dual-Carriage	8,000 - 24,000 mm	3,000 - 6,000 mm	Tandem MIG/MAG, Submerged Arc (SAW)	Ship panels, wind tower sections, large tanks
BRG-C Series	Cantilever Gantry	4,000 - 12,000 mm	1,500 - 3,000 mm	TIG / Plasma Seam Welding	Stainless steel pressure vessels, thin-wall cylinders

Technical Specifications

Specification	Details
Control System	Multi-axis industrial CNC controller via EtherCAT bus communication
Positional Repeatability	+/- 0.1 mm (Linear axes)
Maximum Traverse Speed	15,000 mm/min (X/Y axes)
Z-Axis Vertical Stroke	Standard 800 mm (Optional up to 1,500 mm)
Drive Mechanism	AC servo motors with planetary gearboxes and precision ground helical rack-and-pinion assemblies
Guide Rail Specification	Induction-hardened linear guide rails (Class P5)
Welding Power Source Compatibility	Digital welding packages from Lincoln Electric, Miller, Fronius, or EWM (350A - 1000A)
Input Power Supply	3-Phase AC 380V +/- 10%, 50/60Hz

Key Features

Rigid Bridge Architecture: Heavy-walled structural steel gantry beams are stress-relieved via high-temperature annealing and precision-machined on a floor-type boring mill to prevent deflection over long spans.

Dual-Side Synchronized Drive: X-axis utilizes dual servo motors and gearboxes linked through electronic gear-ratio synchronization on floor-mounted rack tracks to eliminate mechanical skewing.

Anti-Backlash Transmission

Helical rack-and-pinion assemblies paired with preload gearboxes eliminate dead zone backlash for consistent torch vector control during directional reversals.

Integrated Seam Tracking

Real-time laser triangulation or arc-sensing sensors compensate for thermal distortion and workpiece fit-up variations during multi-pass runs.

Tooling Protection

Vertical Z-axis columns incorporate pneumatic or motorized slide units equipped with crash-protection breakaway mechanisms.

Applications

Structural Steel

Fabrication of heavy H-beams, built-up box columns, crane girders, and bridge structural members.

Energy & Power

Longitudinal and circumferential seam welding for wind turbine tower cans, transformer corrugated walls, and pressure vessels.

Shipbuilding

Panel assembly lines, bulkhead stiffener welding, and large hull section fabrication.

Heavy Transport

Chassis frames for mining trucks, railway freight car bodies, and earthmoving machinery booms.

Optional Equipment & Integration

Seam Tracking Systems: Laser displacement sensors for automatic real-time correction of joint deviations along Y and Z axes.

Wire Feed Management: Barrel-pack wire feeders with dual-wire push-pull mechanisms and automated contact tip cleaning/anti-spatter spraying stations.

Flux Recovery Units: Pneumatic separation cyclones and heating hoppers configured for Submerged Arc Welding (SAW) setups.

Manipulation Interfaces: Synchronized digital I/O handshaking for motorized turning rolls, positioners, or hydraulic clamping fixtures.

Fume Extraction: Local exhaust ventilation ducts mounted directly to the gantry carriage.

Customization

Envelope Expansion

Customized rail lengths and bridge spans engineered to match specific factory floor dimensions and maximum workpiece sizes.

Multi-Torch Configurations

Multi-wire SAW setups or dual-station configurations sharing a single gantry bridge.

Software Integration

Post-processors tailored for offline programming software (Robotmaster / Hypertherm) or custom HMI interfaces integrated into existing MES plant networks.

Environmental Hardening

Thermal shielding and sealed cabling conduits for high-temperature or heavy dust environments.

Manufacturing, Quality Control & Factory Acceptance Testing

ISO 9001 Quality Framework

All manufacturing processes, material traceability protocols, and assembly procedures comply with ISO 9001 quality management standards.

Thermal Stress Relief

Gantry bridge frames and column weldments undergo thermal annealing in a gas-fired furnace at 600°C to 650°C for 6 hours followed by controlled cooling.

Precision Machining

Guide rail mounting surfaces on gantry beams and floor tracks are milled and ground in a single setup on a CNC gantry milling machine to ensure straightness parallelism within 0.05 mm/m.

Laser Interferometer Calibration

Assembled systems undergo dynamic laser interferometer calibration to verify axis positioning accuracy, straightness, and pitch/yaw errors.

Standards & Safety

Electrical Compliance

Control cabinets built to IEC 60204-1 (Safety of machinery - Electrical equipment of machines) utilizing CE-certified components (Schneider, Siemens).

Structural Integrity

Structural calculations comply with AWS D1.1 (Structural Welding Code) and ISO 13920 (Welding - General tolerances for welded constructions).

Safety Interlocks

Emergency stop mushroom buttons on both gantry sides, perimeter light curtains, optical safety scanners, and physical over-travel limit switches on all axes.

Product Selection Guide

01/

Define Workpiece Dimensions: Determine maximum length, width, and weight to establish required X-axis rail length and Y-axis bridge clearance.

02/

Select Welding Process: Choose MIG/MAG for high-speed structural fillets, Submerged Arc (SAW) for deep-penetration thick plate butt joints, or TIG for stainless steel vessels.

03/

Evaluate Joint Complexity: Select standard CNC path control for repetitive straight-line bevels, or add laser seam tracking if thermal distortion or fit-up gaps vary across batches.

04/

Determine Duty Cycle & Station Layout: Assess single-station load/unload times versus dual-station shuttle setups to match throughput targets.

FAQ

Q: What is the maximum span available for the gantry bridge?

A: Standard transverse spans range from 2,000 mm to 6,000 mm. Extended spans up to 8,000 mm are engineered on a project-by-project basis following finite element analysis (FEA) structural deflection checks.

Q: How does the system prevent rail misalignment over long tracks (>12 meters)?

A: Floor tracks are anchored to reinforced concrete foundations using precision leveling shims and chemical anchor bolts. The dual-side rack-and-pinion drive uses independent absolute encoders coupled with master-slave electronic gearing to correct any mechanical lag dynamically.

Q: Can the gantry system integrate with third-party welding power sources?

A: Yes. The CNC controller features standard analog (0-10V) and digital communication interfaces (Modbus, Profinet, CANopen) to interface with Lincoln, Miller, Fronius, EWM, and other industrial welding power supplies.

Q: What foundation preparation is required prior to installation?

A: A reinforced concrete foundation pad with a thickness of at least 300 mm (flatness tolerance within +/- 2 mm over the total track length) is required. Foundation layout drawings and anchor bolt placement specifications are provided during the engineering design phase.

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