1
Assembly datum review
Identify mounting planes, hole patterns, door gaps, purchased parts, service access, and critical interfaces.
Checkpoint
Functional interfaces separated from cosmetic or noncritical dimensions.
Quality System
ISO 9001
Manufacturing Lead Time
Quoted by Scope
500+
Projects Completed
25+
Countries Served
25+
Years Experience
Dongguan
China Factory
Certified Quality & Compliance
Fabex operates a quality management system certified to GB/T 19001-2016 / ISO 9001:2015.
ISO 9001:2015 Certified
GB/T 19001-2016 quality management system
Assembly-focused fabrication
Built for welded, finished, and hardware-complete assemblies
This route is differentiated from custom sheet metal parts by focusing on integrated frames, cabinets, housings, and ready-to-install subassemblies.
| Capability | Fabex scope | Engineering checkpoint |
|---|---|---|
| Part envelope and logistics | One standalone part can be reviewed up to 5 m long x 3 m wide x 3 m high; multi-part assemblies can be longer when split for shipment | Most shipping pieces should target approximately 2.3 m or less in the relevant dimension. Consider standard 2440 x 1220 mm sheet stock, nesting, packed dimensions, container and truck clearances, lifting, route, and freight before release. |
| Materials and sections | Most work uses 0.6-5 mm material; suitable welded plate can exceed 10 mm; sheet, plate, tube, and angle are reviewed by process | Material grade, joint preparation, access, heat input, distortion control, and inspection requirements govern heavy welding. |
| Joining and CNC integration | MIG, TIG, spot welding, hardware integration, and CNC machining review up to approximately 200 mm | The machining value is not sheet-metal thickness; machine travel, workholding, material, geometry, joint method, and access are confirmed before quotation. |
| Assembly tolerances | Functional interfaces and overall assembly tolerances are agreed from the released drawing | The tolerance plan accounts for weld shrinkage, fixture strategy, process sequence, and coating buildup. |
| Finish and packout | In-house automated powder-coating line with custom colors and painting textures | Cosmetic zones and protected interfaces should be marked on the drawing. |
Not sure whether your part fits this capability?
Send your drawing, material, quantity, and delivery target. Our team will review the process route, manufacturability risks, and open questions before quotation.
Assembly engineering
Control the interfaces, fixture strategy, and final condition
Assembly fabrication succeeds when datums and interfaces are planned before individual pieces are cut.
2
Joint and fixture plan
Choose joint preparation, weld sequence, fixturing, fasteners, and inspection access.
Checkpoint
Distortion risks addressed before the first assembly.
3
Fit-up and finish
Verify subcomponent fit, control weld sequence, grind only specified surfaces, and protect masked areas.
Checkpoint
Assembly checked before irreversible finishing operations.
4
Final integration
Install specified hardware or purchased items, inspect interfaces, and pack to protect the finished assembly.
Checkpoint
Final condition matched to the approved bill of materials and drawing.
What changes your quoted cost
- Fixture complexity
- Weld length and access
- Grinding and cosmetic class
- Purchased hardware and assembly labor
- Finished size and export packaging
- Part count and material mix
How we plan your project
Welded subassembly program
See the commercial and engineering checkpoints Fabex uses to move this type of job from drawing review into controlled production.
Application
Drawing-defined sheet metal parts and assemblies
Material
Drawing-specified material and thickness
Quantity
Prototype through repeat production
Lead time
Confirmed after DFM and material review
Typical production challenge
Assembly alignment of subcomponents while maintaining consistent surfaces and edges.
Approach
Define assembly datums, simulate the weld sequence, inspect before coating, and verify final interfaces after hardware installation.
What you receive before release
Documented DFM findings, a proposed manufacturing route, quotation, and lead-time plan for your approval.
Assembly sourcing
Custom metal assembly FAQs
Questions specific to welded and finished subassemblies.
How is this service different from custom sheet metal fabrication?+
This page focuses on complete assemblies: multiple fabricated parts, welded or fastened together, finished, fitted with hardware, and inspected at assembly interfaces. The custom sheet metal page covers the broader part sourcing workflow.
Can you install customer-specified hinges, latches, inserts, or purchased parts?+
Yes, when part numbers, supply responsibility, installation method, and inspection criteria are defined. Fabex can quote customer-supplied or factory-procured hardware separately.
How do you control distortion in welded cabinets and frames?+
The plan can combine joint design, balanced weld sequencing, controlled heat input, fixtures, intermediate checks, and post-weld correction where appropriate.
Should cosmetic welds and ground surfaces be marked on the drawing?+
Yes. Mark exposed surfaces, required weld profile, grinding limits, coating class, and surfaces that must not be blended. This prevents unnecessary labor and inconsistent appearance.
Can assemblies be delivered ready for final installation?+
They can include specified finish, hardware, labels, protective packaging, and agreed inspection records. Electrical or other regulated integration must be defined and confirmed during quotation.
How is final assembly fit verified?+
Define the assembly datums, mating interfaces, critical clearances, hardware condition, and test method before production. Depending on the part, verification may use direct measurement, a checking fixture, customer-supplied mating parts, or a documented trial assembly.
Engineering before production
Three DFM checks that prevent expensive revisions
A useful fabrication quote begins with the manufacturing route, critical interfaces and realistic tolerances, not only a CAD model.
View the complete sheet metal DFM guideControl the critical features
Apply tight tolerances only to datums, mating features and functions that need them. Process and size govern what is practical; unnecessary precision adds setups, inspection, cost and lead time.
Reduce setup changes
Standardize bend radii, hole sizes, hardware and material thickness wherever the design permits.
Plan the full route
Check cutting, bending, welding, finishing, inspection and assembly access before releasing the drawing.
Customer Perspective
Trust is earned in the next order
B2B customers often give brief, practical feedback and show their trust through the next project.
Selected customers
- Huawei
- vivo
Full production programs, repeat orders, and multi-year supply — not one-off samples. References available for your sector on request.
Trust shown through repeat work
In contract manufacturing, the clearest reward is often another drawing, another production order, or a larger scope.
Confidential by default
We do not publish a customer's name, product, drawing or project details without written permission. That is not a lack of proof - it is how contract manufacturing works, and it is the same discretion we apply to your designs.
Free Design Review & Quote Drawing and requirement review Free design optimization review No obligation, no hidden fees
Ready for Your Custom Sheet Metal Fabrication?
Send your drawings and requirements for an engineering review, project-specific quotation, and manufacturing plan.