OEM manufacturers often need more than a company that can simply cut and weld metal. A reliable fabrication partner must be able to understand engineering drawings, select appropriate manufacturing processes, control weld quality, maintain dimensional accuracy, and support production as quantities increase.
Understanding how a custom fabrication project moves from a CAD drawing to a finished assembly can help engineers and purchasing teams choose the right manufacturing partner.
1. Start With a Complete Drawing Package
Successful fabrication begins with clear manufacturing information.
A typical RFQ package may include:
- CAD files and PDF drawings
- Material specifications
- Material thickness
- Dimensional tolerances
- Weld requirements
- Surface finish or coating requirements
- Estimated order quantities
- Required delivery schedule
Providing this information early allows the fabricator to evaluate the project accurately and identify potential manufacturing concerns before production begins.
2. Design for Manufacturability
A component that looks straightforward in CAD may present challenges during fabrication.
Bend locations, weld access, material availability, fixture requirements, distortion, tolerances, and assembly sequence can all affect manufacturing cost and repeatability.
Early communication between the OEM and fabricator can identify opportunities to simplify manufacturing without changing the intended function of the component.
3. Material Preparation and Forming
Once the design is approved, raw material is prepared according to the drawings.
Depending on the component, manufacturing may involve cutting, drilling, forming, bending, machining, or other preparation before welding begins.
Accurate preparation is particularly important for welded assemblies because inconsistent components can create fit-up problems later in production.
4. Welding and Assembly
The appropriate welding process depends on material, joint design, component geometry, production quantity, and quality requirements.
Manual welding provides flexibility for prototypes, complex components, repairs, and lower-volume production.
Robotic welding can be valuable for repeat-production assemblies where consistent part fit-up and accessible weld locations make automation practical.
Many OEM projects benefit from using both processes.
5. Fixtures and Production Repeatability
Fixtures help locate and hold components during welding and assembly.
For repeat-production parts, a properly designed fixture can improve dimensional consistency, control component positioning, and reduce setup time.
Fixture development becomes especially important when moving from prototypes into recurring production.
6. Inspection and Quality Control
Fabricated components should be inspected against the customer's drawing and manufacturing requirements.
Inspection may include dimensional verification, visual weld inspection, fit-up checks, and application-specific testing.
For products such as hydraulic reservoir tanks, leak testing can also be an important part of the manufacturing process.
7. Finishing and Delivery
Depending on the application, fabricated components may require painting, powder coating, surface preparation, or another protective finish.
Packaging should also be considered, particularly for finished assemblies that can be damaged during transportation.
Choosing a Custom Metal Fabrication Partner
OEM buyers should consider more than price when evaluating a fabrication supplier.
Important factors include manufacturing capability, welding experience, quality control, communication, production capacity, engineering support, and the ability to handle both prototypes and recurring production.
Engineered Welding, Inc. provides custom metal fabrication, robotic welding, welded assemblies, hydraulic reservoir tank manufacturing, and prototype-to-production support for OEM and industrial applications.
Companies looking for an experienced custom metal fabrication partner can learn more about Engineered Welding's manufacturing capabilities and discuss their CAD drawings and production requirements directly with the company.
Final Thoughts
Moving a fabricated product successfully from CAD drawing to production requires coordination between design, material preparation, forming, welding, fixturing, inspection, and finishing.
Selecting a fabrication partner with the right combination of equipment, manufacturing experience, communication, and production capability can help OEMs achieve more consistent results while simplifying their supply chain.
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