Sheet Metal welding services
Sheet Metal Welding Services
TIG, MIG & Spot Welding
for Production-Ready Assemblies
Guanghao provides professional sheet metal welding services for prototypes through mass production. We combine laser cutting + CNC bending + welding + finishing under one roof in Foshan to deliver strong, clean, and consistent weldments-supported by an ISO 9001 quality system and fast logistics.
ISO 9001
Certified
2-3 Days
to Taiwan via SF Express
4-in-1
Cut + Bend + Weld + Finish
Foshan
Factory
01 - What We Weld
Sheet Metal Assemblies Built for Real Products
From simple brackets to complex multi-part housings, we weld sheet metal assemblies that must pass fit, function, and appearance requirements.
Equipment Housings & Covers
Protective covers and housings for industrial and commercial equipment applications.
Chassis, Frames & Brackets
Structural welded assemblies for load-bearing and support applications.
Electrical Boxes & Cabinets
Control boxes and cabinets requiring precise fit and reliable sealing.
Battery Boxes & New Energy
Enclosures for battery packs and charging equipment in new energy applications.
Server & Communication Housings
Chassis and housings for server racks and communication infrastructure.
Panels, Mounts & Sub-Assemblies
Fixtures, mounting hardware, and welded sub-assemblies for diverse applications.
02 - Welding Processes
TIG / MIG / Spot Welding
We select the process based on material, thickness, joint design, cosmetic requirements, and throughput.
TIG Welding (GTAW)
Gas Tungsten Arc Welding
Best for fine control, clean beads, cosmetic surfaces, thin materials, and stainless steel/aluminum applications where appearance matters.
MIG Welding (GMAW)
Gas Metal Arc Welding
Efficient for production, strong joints, and repeatable weld quality on steel/stainless where speed and throughput matter.
Spot Welding
Resistance Spot Welding
Ideal for sheet-to-sheet lap joints, brackets, cabinet structures, and fast, consistent joining without continuous beads.
03 - Materials
Materials We Weld
We support common sheet metals used in industrial manufacturing. If you have material grade, temper, and surface condition requirements, include them in the RFQ.
Stainless Steel
Steel / Mild Steel
Cold Rolled / Hot Rolled Steel
Galvanized Sheet
process planning required
Aluminum
Copper / Brass / Bronze
application dependent
Nickel Alloys / Titanium
consultation required
04 - Quality Standards
What "Good Welding" Means in Production
Professional customers don't just want a weld that "holds"-they need predictable, inspectable results. We engineer for:
Correct Weld Spec
Correct weld size, location, and continuity per drawing specifications and callouts.
Stable Fit-Up
Controlled gaps and stable fit-up before welding to ensure joint integrity.
Distortion Control
Protect flatness and assembly alignment through controlled heat input and sequencing.
Clean Bead Profile
Especially important for cosmetic faces and surfaces requiring finishing treatment.
Smooth Transitions
For finishing compatibility-powder coat, paint, plating, and other treatments.
05 - Distortion Management
Dimensional Control & Distortion Management
Thin sheet metal can warp if heat input and sequence aren't controlled. If your assembly has flatness, perpendicularity, or critical hole position requirements, mark them clearly as CTQ dimensions.
Proper Fixturing
Clamping strategies to hold parts in position during welding.
Tack Strategy
Welding sequence planning for optimal stress distribution.
Heat Input Control
Process parameters and travel speed management.
Joint Design Review
Fit-up review during drawing evaluation phase.
Post-Weld Correction
Straightening solutions when required and approved.
06 - Integrated Workflow
Welding + Sheet Metal Fabrication
One Supplier, One Timeline
Welding quality depends on upstream processes. Guanghao supports the full workflow-reducing miscommunication, shortening lead time, and improving final assembly fit.
Laser Cutting
0.5-6 mm, accuracy ±0.05 mm, minimum kerf 0.1 mm
CNC Bending / Forming
Bending accuracy ±0.1 mm, max length 3000 mm
Welding & Assembly
TIG / MIG / Spot Welding-process matched to requirements
Stamping
50-200 tons for high-volume consistency
Surface Treatment & Final QC
Complete finishing and quality verification before shipment
07 - Surface Finishing
Post-Weld Surface Finishing
We provide post-weld finishing options to meet cosmetic and performance specs. For stainless assemblies, specify whether heat tint control/cleanup is required for appearance and corrosion performance.
Grinding / Blending
Polishing
Sandblasting
Wire Drawing / Brushing
Spraying / Painting
Powder Coating
Electroplating
Anodizing (Aluminum)
Chemical Film / Coating
Electrochemical Nickel
Gold / Silver Plating
Other (Consultation)
08 - Quality Assurance
ISO 9001 Quality System & Pre-Shipment Inspection
Our welding service is managed under an ISO 9001 quality system with full-process monitoring and final verification. If you require inspection reports, define the format and CTQ features in your RFQ.
Drawing Review & Weld Callout Confirmation
Verify weld symbols, sizes, and acceptance criteria before production.
In-Process Checks
Fit-up, weld size, visual criteria per your spec.
Final Dimensional Inspection
For assembly interfaces and critical dimensions.
100% Inspection Before Shipment
Per your inspection plan and report format.
Rework / Containment Procedures
For nonconformance control and documented resolution.
09 - Weld Inspection
Optional Weld Inspection Methods
Depending on product requirements, we can support common inspection approaches. Tell us your acceptance standard or internal requirements so we can align the inspection plan.
Visual Testing
For bead profile, discontinuities, and workmanship evaluation.
Liquid Penetrant Testing
For surface-breaking indications (material dependent).
Magnetic Particle Testing
For ferromagnetic materials (steel)-detecting subsurface indications.
Leak Testing
For sealed enclosures-define method and acceptance criteria.
10 - Industries
Industries We Serve
Electronics & Electrical
Control boxes, cabinets, enclosures
Communication
Server chassis, housings
Automotive
Brackets, mounts, structural parts
Industrial Equipment
Guards, covers, frames
Architectural
Frames, signage structures
Furniture & Appliances
Supports, housings
New Energy
Charging housings, battery boxes
Lighting Equipment
Structures, mounts, housings
11 - Lead Time & Shipping
Fast Turnaround, Reliable Logistics
Prototype to production, with reliable delivery from Shenzhen to Taiwan.
Prototype to Production
Both supported-from single prototypes to volume production runs.
Fast Delivery
Simple builds move quickly; complex assemblies require additional time for fixtures and finishing.
Taiwan Delivery
Typically 2-3 days via SF Express (service/route dependent).
Need an Urgent Build?
Send your deadline and quantity-we'll evaluate feasibility and propose the fastest plan.
12 - RFQ Checklist
Get a Quote That Matches Your Spec
To quote accurately and avoid rework, include:
2D drawing (PDF) + revision
3D file (STEP/IGES) if available
Material grade + thickness + surface condition
Quantity (prototype + forecast)
Weld type and location (symbols/callouts)
Weld size/length/pitch (e.g., fillet size, intermittent pattern)
Cosmetic requirement: A-side/B-side, grinding/blending
Distortion/flatness/alignment requirements (CTQ)
Post-weld finishing (powder coat, plating, anodize, etc.)
Inspection requirements (VT/PT/MT/leak test) + report format
Delivery location and required date
13 - FAQ
Welding FAQ - For Engineers & Buyers
Can you weld assemblies after laser cutting and bending?
Yes. We commonly produce complete assemblies: laser cut → bend → weld → finish → inspect. Our integrated workflow ensures consistency and reduces lead time by keeping everything under one roof.
Which welding process should I choose - TIG or MIG?
TIG is often preferred for thin sheet and cosmetic welds; MIG is efficient for production and robust joints. We'll recommend the best option based on your drawings and requirements. You can also specify the process on your drawing.
Do you support spot welding for enclosures and cabinet structures?
Yes-spot welding is ideal for fast, consistent sheet-to-sheet joining. It's commonly used for cabinet structures, brackets, and lap joint configurations where continuous beads are not required.
Can you meet cosmetic requirements (clean welds, smooth surface for coating)?
Yes. Specify the cosmetic face and whether blending is required. We'll plan the weld and finishing process accordingly. We support grinding, polishing, sandblasting, and other post-weld surface treatments to achieve the desired appearance.
Ready to weld your next assembly?
Send your drawings and requirements-our engineers will get back to you with a quote and DFM feedback.
Get a Quote Now