A robot welding workstation frame may fit the factory floor but not the truck, container, building door or installation route. Splitting it into modules solves the logistics problem only if robot, fixture, positioner and guarding relationships can be recovered at the destination. An arbitrary cut through a welded base can exchange one transport issue for weeks of site alignment.
An effective RFQ treats modular shipping and reassembly as part of the mechanical design. The OEM or integrator owns cell coordinates, equipment alignment, process access, foundations and final acceptance. The robot welding frame factory can fabricate and trial-assemble released modules, but it should not invent installation datums or certify the complete welding cell.
Survey the logistics path before setting split lines
Provide origin and destination handling constraints before the frame is detailed. Include permitted package size and mass, container or vehicle limits, lifting equipment, building openings, floor routes, overhead restrictions and available staging area. If equipment must be installed in sequence, show that sequence.
The largest transport envelope may not be the frame itself. Positioner stands, service platforms, fixture subframes and guarding modules can create awkward packages. Decide which equipment ships installed, removed or represented by gauges during the shop trial.
Transport information should be project-specific. DRAmetal should not promise a module will fit a route that has not been surveyed by the responsible installation team.
Choose split lines from functional relationships
Place module joints away from precision mounting zones, high-load nodes and areas that are difficult to access on site. A split line should support fabrication, inspection, lifting and reassembly. It should not require field welding near machined pads unless the released installation and requalification plan explicitly allows it.
Bolted joints with controlled locating features are often easier to verify than a site-welded seam, but their suitability depends on the responsible structural design. Define which joint surfaces transfer load, which features locate the module and which fasteners provide clamp force. Do not ask bolts to correct an uncontrolled gap.
For large robot welding cell components, separate the common floor base from positioner, pedestal, tooling or guard supports where this preserves useful interfaces. Avoid splitting through the shared coordinate relationship without a method to recover it.
Build a datum-transfer strategy
The released drawing should connect module datums to the complete cell coordinate system. Machined pads, dowel holes, keys, tooling balls or approved gauge interfaces can help recover relationships after shipment. Cosmetic frame edges and paint boundaries should not become installation references.
Define the support condition for shop inspection and site reassembly. A frame measured on an inspection table may respond differently after leveling and anchoring. If foundation or floor variation is expected, show where adjustment is permitted and where the frame must seat directly.
The robotics frame FAI and datum checklist can organize the relationship among support points, free-state inspection, restrained inspection and installation datums. The project still needs its own approved criteria.
Design lifting and temporary support features
Every module needs an approved handling method. The responsible engineer should define lifting points, orientation, center-of-gravity information, spreader requirements and any temporary braces. Lifting eyes and fork pockets should connect to structure capable of carrying the released handling loads.
Temporary braces must be identifiable and removable without damaging functional surfaces. If a brace controls geometry during transport, the installation plan should state when it is removed and what supports replace it. Do not allow packaging timber or straps to become undeclared structural supports.
Protect workers and equipment through a qualified lift plan and site procedure. A fabricator can manufacture released lifting features but does not approve cranes, rigging, personnel access or installation safety.
Perform a controlled shop trial assembly
Trial assembly verifies that modules, joints, hardware and access work together before shipment. Assemble the frame on the released supports, follow the planned sequence and use production-intent hardware. Record shims, joint gaps, locator seating and tightening sequence where required.
Install approved equipment or interface gauges to verify robot, positioner, fixture and guard-support relationships. A gauge-based check can be useful when customer equipment is unavailable, provided the gauge and method are released.
| Trial-assembly question | Evidence | Responsible acceptance |
|---|---|---|
| Do modules seat on intended locators? | Joint contact and locator record | Mechanical design/quality plan |
| Are fasteners and tools accessible? | Assembly-sequence observation | OEM and supplier review |
| Are shared equipment datums recovered? | Dimensional or interface-gauge results | Released FAI plan |
| Can modules be lifted without distortion? | Approved handling demonstration | Qualified lift and mechanical team |
| Can guards and services attach after assembly? | Representative fit check | Integrator |
The trial does not qualify robot paths, welding process, controls or safeguarding. Those remain part of integrator commissioning.
Preserve configuration through packout
Marking and packaging should link each module, joint hardware set, shim or locator to the released assembly without placing uncontrolled markings on visible or precision surfaces. Use a packing map and hardware grouping appropriate to the project.
Protect machined pads, dowel holes, flange faces, threads, finished panels and cable-entry surfaces. Separate heavy modules from thin guards and covers. Corrosion prevention should match material, finish, route and storage expectations supplied by the buyer.
Package the records needed at site: approved assembly sequence, module configuration, hardware list, inspection status and open deviation references. Documents should identify the correct revision; a generic installation sheet can reintroduce an obsolete setup.
Plan receiving and site reassembly
The receiving plan should check package condition, module identity, protected datums, hardware completeness and visible transport damage before assembly begins. Record concerns before removing all bracing so the condition remains traceable.
Site reassembly should follow the same controlled locating and tightening logic used during the shop trial. Define foundation preparation, leveling method, anchor scope and the point at which temporary supports are removed. Field-drilled holes, uncontrolled shims and forced alignment need engineering review rather than becoming permanent installation practice.
After reassembly, verify the project-defined module and equipment relationships. The integrator then installs and calibrates the robot, positioner, tooling, services, controls and safeguarding. Any site modification affecting the mechanical baseline should return through configuration control before repeat frames are built.
Issue a comparable modular-frame RFQ
Include:
- Complete workstation layout and mechanical supply boundary.
- Robot, positioner, fixture, guarding and service interfaces.
- Destination route, package and handling constraints.
- Released structural and transport loads.
- Approved split lines and module-joint design.
- Cell datum system and site-recovery method.
- Lifting points, braces and support conditions.
- Shop trial-assembly and FAI requirements.
- Packout, preservation and receiving records.
- Site foundation, alignment, anchoring and final-validation ownership.
Review robotics frame and chassis fabrication and custom sheet-metal frames and weldments for the relevant mechanical scope. The robotic welding cell base-frame guide provides complementary datum and fixture context, and the robotics industry hub connects the package to other robot applications.
DRAmetal manufactures, inspects and packs released frame modules and drawing-defined components. The OEM, system integrator and qualified structural, installation, safety and electrical professionals retain responsibility for application design, cell coordinates, foundations, rigging, controls, safeguarding, regulatory requirements, certification and final commissioning. When the modular package is released, send the workstation-frame RFQ for review.
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