9-Axis Gantry Welding Robot Workstation
The gantry type multi additional axis dual machine intelligent welding workstation is mainly used for robot automated welding of various steel structure buildings, bridges, ships and other structures. The workstation meets the welding requirements of various corner welds such as H-shaped steel structures, bridge slab units, and horizontal plates, and has continuous upgrading conditions. It will also adapt to welding in other scenarios in the future. Each gantry welding workstation includes a control system, gantry walking mechanism, 2 sets of arc welding robots, 2 sets of robot welding power supplies and cooling water tanks, 2 sets of intelligent welding vision systems, and 2 sets of water cooling gun systems.
Product Images
Assembly diagram of the Gantry Nine-Axis Workstation
Parameters of the Gantry Nine-Axis Workstation
| subitem | unit | content |
| applicable scenarios | / | Mainly used for bridge structure plate units, H-beams, and other assembly components such as transportation rails |
| equipment specifications | m | 24*7.5*4.8 |
| total power | KW | 37 |
| Maximum working range | m | 24*5*1.5 |
| average welding efficiency | m/day | 160~220(The structural types are different) |
Performance of the Gantry Dual-Machine Nine-Axis Workstation
| Application processes | Cutting, marking, welding |
| Environmental protection equipment | optional equipment |
| Work Coordinate System | PCS1、PCS2、PCS3 |
| Working range | 24000*5000*1500 |
| Working hours | 7*20H |
| Welding Process Package | CO2/80% CO2+20%AR solid core carbon steel, CO2flux-cored carbon steel DC and pulse welding |
| Welding Material Type | spool packaging、drum packaging |
| applicable scenarios | Welding of large enclosures, H-beams, columns, bridge plates, large bulkheads, and other structural components |
| Motion mode | Nine-axis linkage |
| Auxiliary Axis | Optional Ground Track and Gantry |
Workflow of the Gantry Dual-Machine Nine-Axis Workstation
1)Manually or via conveyor chain, transport the components to be welded to the workstation frame, positioning them near point P；
2)(Simultaneously or in advance) Operators rotate the model consistently and create nodes based on the component number and placement；
3)If the placement deviation is too large, use a camera to identify the component’s positioning point P. If the placement is close enough, operators directly load the model and initiate scanning；
4)After scanning is complete, the system initiates welding；
5)Once the welding of the entire component is completed, transport the component to the subsequent workstation. If there is no component model, the equipment can be operated for welding using visual interaction. After placing the component on the workstation, operators take photos of the welding areas using a camera, match the process, and initiate scanning for welding. Compared to model-driven operations, this method increases the relative workload for operators
Applicable Component Display (Partial)
Which workpieces suit a 9-axis gantry welding robot?
The dual-robot gantry arrangement is intended for large structural steel assemblies, including bridge plate units, H-beams and related fabricated components. Its attraction is the ability to arrange welding work across a broad installation area. The two robot packages and the gantry travel must be planned around the positions of the actual welds, the support frames and the component loading route.
Start the selection with the weld map. Identify whether the part is a flat panel, a beam with exposed joints, a tall assembly or a box-like structure with restricted openings. These geometries can have similar outside dimensions and very different access requirements. Stiffener height, clear distance between plates and the direction from which the torch must approach each seam are often more useful than a single overall width.
The published 24 × 7.5 × 4.8 m installation dimensions and 24 × 5 × 1.5 m working-range reference describe the listed configuration. The installed space is not the same as the accessible joint envelope. Loading aisles, end travel, supports, torch orientation and fixtures must be included in the final layout. The quotation should state the usable range and the joints included in the production plan.
Understand the complete dual-robot configuration
The existing configuration description includes the control system, gantry mechanism, two arc-welding robots, two welding power-source and cooling packages, two vision systems and two water-cooled torch systems. Compare quotations for this complete delivered scope. A price for the gantry frame or a robot arm alone cannot be compared directly with an integrated installation.
The motion arrangement should define the work assigned to each robot and how their permitted areas are coordinated. Two robots do not guarantee twice the output. Some seams cannot be approached simultaneously; scanning, loading and handling may remain shared operations. Agree the production sequence and record whether the quoted trial result uses one robot or both.
| Configuration issue | Question for the layout review | Why it affects production |
|---|---|---|
| Travel and height | Which joints remain accessible at the travel limits? | End zones and tall stiffeners can change usable coverage |
| Two robot packages | How are work areas and sequences coordinated? | Interference or shared tasks can limit simultaneous use |
| Model or visual workflow | Which part data and operator steps are needed? | Part variety changes preparation and changeover time |
| Welding package | Which procedures, passes and torch consumables are included? | The required weld quality sets the process scope |
| Handling and support | How are parts loaded, turned and removed? | Crane access and fixture occupation affect total cycle time |
A practical production workflow
Prepare and place the structural component on its supports, using the reference arrangement agreed for the cell. Check part identity, orientation and the stability of the assembly. Material preparation and joint fit-up should be ready before the scanning sequence begins. Avoid treating the robot as a remedy for uncontrolled assembly variation.
In a model-driven workflow, select the correct component model and its placement. The existing workflow describes location checks when placement differs substantially, followed by scanning and welding. For work without a prepared model, a visual interaction approach may require more operator input. Confirm the intended method on your own component family rather than assuming both methods have the same preparation time.
Review the generated path, process assignment and sequence during commissioning. Welding then follows the accepted setup. Include robot coordination, cleaning and the necessary changes in torch approach in the cycle. After completion, inspect the joints and transfer the component to its next operation. Handling time, incomplete seams and rework should remain visible in the production record.
Problems to investigate during the sample trial
A gantry can bring the welding packages to different areas of a long or broad assembly and may reduce repeated movement of the workpiece. The sample trial should show which joints become accessible and where a second setup is still necessary. A successful demonstration on a flat plate does not establish access to every internal corner of a more complex assembly.
Use representative geometry and joint preparation. Include the awkward intersections, stops and changes of height, not only a straight seam in the easiest position. Establish the required inspection method before the trial. Record the accepted output alongside scanning time, torch cleaning and handling so that the production estimate can be compared with the workshop baseline.
The existing metres-per-day figures are configuration references and depend on the structural type. They should not become a fixed delivery promise for a different component. Weld size, number of passes, joint length, robot access and available handling capacity all affect accepted-part output. A quotation based on your drawings and trial is the useful basis for a production commitment.
Gantry, cantilever or ground rail?
Compare the 8-axis cantilever for suitable plate units needing a cantilever working arrangement. A ground rail workstation may be appropriate where long components stay within the lateral reach of the robot. For compact parts, a single robot station can avoid specifying travel that the task does not require.
The 7-axis and 8-axis gantry pages describe other layouts in this family. Compare configuration-specific working ranges and motion diagrams, rather than assuming that the same axis number always means the same machine scope. Select the simplest arrangement that meets the weld access, handling and output requirements.
Five questions to ask before ordering
Does a dual-robot gantry double production output?
Not automatically. Output depends on whether both robots can weld useful seams at the same time and on shared scanning, handling and loading steps. Compare accepted-part cycle times for the proposed sequence.
Can this workstation weld inside any box girder?
Internal welding requires a separate access review. Opening size, torch posture, sensor visibility, cable routing and the assembly sequence can restrict access. Submit internal joint drawings and representative samples before accepting that application.
Is the installation footprint the maximum component size?
No. Installation dimensions include the mechanical arrangement. The accessible joints must be checked against usable travel, supports and robot reach, together with the required loading and operating clearances.
Do we need a model for every component?
The existing workflow provides model-driven and visual-interaction approaches. Their preparation steps differ. Agree which method will be used for each production family and check the resulting operator workload in a trial.
What information is needed for a gantry quotation?
Provide part and weld drawings, material, thickness, mass, daily production demand, quality requirements and a floor plan. Include the crane or conveyor arrangement and the sequence used to turn or transfer the workpiece.
Box girder welding in production
See our box girder gantry welding case study for the measured scanning and welding times, the accessible-joint workflow and the basis for evaluating a comparable component.
Discuss your component and production target
Send your component drawings, weld requirements and floor layout through the enquiry form below. We can review the joint access and the appropriate configuration before preparing a quotation.
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