Why Choose DeepLink for Custom Metal Welding Services

DeepLink Metal Fab operates 25+ certified welding stations including robotic TIG, MIG, spot, and laser welding cells, delivering plus-minus 0.5mm joint precision on assemblies from single-piece prototypes to high-volume production. As an ISO 9001:2015 certified custom metal welding service provider in China, our AWS/ISO 9606 certified welders handle everything from ultra-thin sheet metal (0.5mm) to heavy structural plate (25mm) for automotive, aerospace, industrial equipment, and construction clients worldwide.

Metal Welding Capabilities

• Welding Technology: TIG (GTAW), MIG (GMAW), spot welding, laser welding, plasma welding, robotic welding, brazing
• Materials: Stainless steel (304/316/321), aluminum (5052/6061/7075), carbon steel, mild steel, galvanized steel, copper, brass, titanium
• Thickness Range: 0.5mm to 25mm (varies by process and material)
• Joint Tolerance: plus-minus 0.5mm
• Weld Standards: AWS D1.1, D1.2, D1.6, ISO 3834, EN 15085
• Welder Certifications: AWS Certified, ISO 9606 qualified
• Quality Testing: Visual inspection, dye penetrant (PT), ultrasonic (UT), X-ray (RT), hydrostatic pressure testing
• Order Volume: 1 piece prototype to 50,000+ mass production
• Lead Time: 2-3 days for prototypes, 10-20 days for production

What is Metal Welding?

Metal welding is a fabrication process that joins two or more metal parts by heating them to their melting point, applying pressure, or both, to form a permanent metallurgical bond. Unlike mechanical fasteners (bolts, rivets) or adhesives, welded joints deliver strength equal to or greater than the parent metal, making welding essential for structural assemblies, pressure vessels, and load-bearing metal fabrications.

Common Metal Welding Methods

• TIG Welding (GTAW): Uses non-consumable tungsten electrode with inert argon shielding gas. Produces clean, precise welds on thin materials (0.5mm+). Ideal for stainless steel, aluminum, and titanium in aerospace, medical, and food-grade applications.
• MIG Welding (GMAW): Uses continuous wire electrode with active shielding gas. Fast, versatile, and cost-effective for medium-thick steel and aluminum in general fabrication and automotive.
• Spot Welding: Joins overlapping sheet metal using localized heat and pressure from electrode tips. Standard for automotive body panels and appliance chassis at 500-1000 spots per minute.
• Laser Welding: Uses focused laser beam for narrow, deep welds with minimal heat-affected zone. Ideal for medical implants, battery cells, and precision electronic assemblies.
• Robotic Welding: Multi-axis robots deliver consistent weld quality at high production rates. Essential for automotive frames, exhaust systems, and repeatable structural assemblies.

Key Advantages of Custom Metal Welding

• Structural Integrity: Welded joints often stronger than parent metal, load-bearing capable
• Design Flexibility: Join dissimilar geometries and thicknesses impossible with fasteners
• Corrosion Resistance: No seams or crevices where corrosion initiates
• Weight Reduction: Eliminates rivets, bolts, and lap joints
• Cost-Effective: Robotic welding delivers unbeatable per-part cost at production volumes

Common Applications of Custom Welded Metal Assemblies

Custom metal welding serves industries including automotive (chassis frames, exhaust systems, fuel tanks), aerospace (structural assemblies, engine mounts, fuel systems), construction (structural steel, bridge components, HVAC ducts), industrial equipment (pressure vessels, storage tanks, machinery frames), medical devices (surgical carts, equipment housings), and consumer products (bicycles, furniture, appliances).

How DeepLink Custom Metal Welding Service Works

From CAD file upload to certified welded assemblies delivered worldwide, our custom metal welding workflow ensures joint integrity, dimensional accuracy, and full quality traceability.

1. Upload CAD Files and Get Quote

Upload 3D STEP/STP/SLDPRT assembly files with weld symbols and joint specifications. Our engineering team responds within 24 hours with recommended welding process (TIG/MIG/spot/laser), fixture requirements, and lead time.

2. Free DFM Analysis with Weld Optimization

Our welding engineers verify joint accessibility, distortion risk, and heat-affected zone impact. We recommend joint design adjustments (fillet vs butt, single vs double bevel), weld sequencing, and fixture strategy to minimize distortion and cost.

3. Precision Cutting, Fit-Up, and Fixturing

Component parts laser-cut or CNC-machined to plus-minus 0.1mm accuracy, then assembled in custom welding fixtures for repeatable joint alignment. Tack welds hold assembly during full welding.

4. Certified Welding Production

AWS/ISO 9606 certified welders and robotic welding cells apply process-specific parameters (current, voltage, wire feed, gas flow) monitored by digital weld data acquisition systems for full traceability of every joint.

5. Non-Destructive Testing and Global Shipping

Weld quality verified via visual inspection, dye penetrant (PT), ultrasonic (UT), X-ray (RT), or hydrostatic pressure testing per customer specification. Weld inspection reports available on request. DDP shipping to 50+ countries via DHL, FedEx, or sea freight for bulk orders.

Available Post-Welding Surface Finishes for Custom Welded Assemblies

DeepLink offers comprehensive post-weld cleaning and finishing services to remove heat discoloration, prevent corrosion, and achieve target appearance on your custom welded metal assemblies.

Weld Grinding and Polishing

Mechanical grinding removes weld beads and reinforcement, followed by progressive polishing (#3, #4, mirror #7/#8) for architectural, sanitary, and food-grade applications where flush seamless surfaces are required.

Pickling and Passivation (Stainless Steel)

Chemical pickling removes heat tint and chromium-depleted zones near welds. Passivation restores protective chromium oxide layer for maximum corrosion resistance on stainless steel weldments.

Powder Coating and Painting

Post-weld sandblasting followed by electrostatic powder coating or industrial painting in 200+ RAL colors. Ideal for structural steel, industrial frames, and outdoor equipment.

Hot-Dip Galvanizing

Molten zinc bath deposits 65-150 micrometer zinc coating on welded steel structures for decades of outdoor corrosion protection. Standard for construction, agricultural, and utility applications.

Electropolishing (Stainless Steel)

Electrochemical polishing for medical, pharmaceutical, and semiconductor weldments requiring ultra-smooth, biocompatible surfaces free of contamination.