Short answer: Resistance spot welded stamped assemblies should be quoted with a weld map, not only a part drawing. The RFQ should define material stack, coating, weld locations, access for electrodes, datum fixture, cosmetic limits, distortion control, peel or shear test requirements, sample quantity, and whether welding happens before or after plating, powder coating, or hardware insertion.
Spot welding can turn several giporma nga mga piyesa into a ready-to-install bracket, cover, shield, chassis feature, or reinforcement. It can also create distortion, marks, weak nuggets, coating burn, or missed welds if the joint design and inspection plan are vague.
Use this page with the paghulma sa metal welding and assembly guide, stamped metal assemblies guide, projection weld nut inspection guide, and flatness and warpage control guide.
Spot welded assembly RFQ decisions
| Decision | Why it matters | RFQ detail |
|---|---|---|
| Weld map | The tagasuplay needs exact weld count, location, and sequence. | Weld symbols, diameter target, spacing, and priority welds. |
| Stack and coating | Materyal thickness and coating change heat, marks, and strength. | Materyal stack, plating, galvanized layer, paint, and clean zones. |
| Access and fixturing | Electrodes must reach the joint without moving datums. | Electrode access, fixture datums, clamp points, and assembly orientation. |
| Strength evidence | Visual weld marks do not prove joint strength. | Peel, shear, chisel, macro, sample size, and report format. |
Start with the weld map and assembly function
A stamped assembly drawing should show which surfaces locate the product, which parts carry load, and which welds are structural, grounding-related, cosmetic, or only for handling. If the weld map is missing, the tagasuplay may quote the wrong weld count or choose a sequence that distorts the assembly.
Spot weld spacing, edge distance, flange width, stack thickness, and access are part of DFM. A weld too close to a bend or pierced hole can mark the part or lose strength. If the assembly also has inserted hardware, review sequence with the inserted hardware torque-out and push-out guide.
For assemblies that must sit flat against a mating frame, define the check condition before approval. A part may pass weld strength and still fail installation because weld shrinkage moves datums, bows a flange, or pulls holes out of position after the final fixture is released.
Coordinate welding with coatings and flatness
Galvanized steel, plated parts, pre-coated sheet, and powder coated components behave differently around welds. Some assemblies should be welded before finishing. Others need masked weld zones or post-weld cleaning. Define acceptable burn marks, spatter, discoloration, and exposed metal before the quote is compared.
Welding can also move holes, bend angles, and flatness. The RFQ should state whether the assembly is inspected free-state or in a fixture. For vibration-sensitive or load-bearing assemblies, connect the weld plan to the vibration fatigue guide and the run-at-rate capacity validation guide.
RFQ details to include
- Assembly drawing, BOM, individual part drawings, weld map, weld symbols, datum scheme, and critical stack dimensions.
- Materyal grades, thicknesses, coatings, plating, oil condition, and whether weld zones must be clean or masked.
- Electrode access, fixture datums, clamp points, assembly orientation, and cosmetic surfaces.
- Acceptance tests: visual standard, weld count, peel test, shear test, chisel check, macro section, or customer-specific report.
- Sequence with paghulma, deburring, plating, powder coating, hardware insertion, cleaning, and packaging.
- Annual volume, prototype samples, destructive test frequency, traceability, and target panahon sa paghatod.
How to compare tagasuplay answers
A strong tagasuplay response explains the weld sequence, fixture plan, inspection method, and coating interaction. A weak response only says welding is available. Ask whether destructive testing is included and how often it will be performed during production.
The quote should separate stamped components, welding fixture cost, weld labor or automation, destructive test samples, finishing, and packaging. Otherwise the lowest unit price may hide missing inspection or fixture work.
Ipadala assembly drawings, weld map, material stack, finish route, and test requirements through the kontak page. If the weld map is not final, use the RFQ form to request a DFM review before fixture and tooling costs are locked.
FAQ
What should be included in a spot welded stamped assembly RFQ?
Ipadala part drawings, assembly drawing, BOM, weld map, material stack, finish route, datum plan, test requirements, volume, and sample needs.
Can galvanized giporma nga mga piyesa be spot welded?
Often yes, but coating thickness, fumes, electrode wear, marks, and weld strength should be reviewed before production release.
Is visual inspection enough for spot welds?
Usually not for structural or safety-related assemblies. Peel, shear, chisel, macro, or customer-specific tests may be needed.
Should spot welding happen before or after coating?
It depends on coating, weld access, appearance, corrosion needs, and assembly sequence. The RFQ should define the preferred route or ask for both options.