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TENGHUI provides sheet metal welding services for custom brackets, panels, frames, chassis, enclosures, cabinets, and other fabricated assemblies. Available processes include laser welding, TIG welding, MIG welding, and resistance spot welding.
The welding method is selected according to your material, thickness, joint design, strength requirements, production quantity, and desired appearance. Controlled fit-up, suitable fixtures, and planned welding sequences help reduce thermal distortion and maintain important assembly dimensions.
Send your 2D drawings and 3D CAD files for a welding joint feasibility review and quotation.
Laser welding creates narrow, consistent weld seams with concentrated heat input. It is suitable for thin sheet metal, long seams, visible joints, and repeat production where reduced distortion and clean appearance are important.
TIG welding provides precise control over heat input and filler material. It is commonly used for stainless steel, aluminum, thin sheets, prototypes, complex joints, and cosmetic welds.
MIG welding provides faster welding speeds and efficient filler-metal deposition. It is suitable for carbon steel, stainless steel, aluminum frames, brackets, structural parts, and larger assemblies.
Spot welding joins overlapping sheet metal parts quickly and consistently. Typical applications include panels, cabinets, chassis, covers, brackets, and repeat production assemblies.
From structural steel frames to delicate cosmetic stainless and aluminum assemblies, we select suitable welding methods and fixtures to achieve high joint strength and minimal thermal distortion.
SPCC, SPHC, DC01, DC05, Q235, Q355
Commonly used for brackets, frames, panels, and structural chassis. Offers excellent weldability across all standard fusion processes with high joint strength.
SUS301, SUS304, SUS316, 316L
Requires controlled heat input and inert gas shielding to limit thermal distortion, prevent burn-through, and avoid heat tint discoloration on cosmetic exterior seams.
5052, 5754, 5083, 6061
Requires suitable filler wire (e.g., 4043 or 5356), thorough surface oxide cleaning, and pure argon shielding gas to prevent weld porosity and cracking.
SECC (Electrolytic), SGCC (Hot-Dip)
Requires engineering review because vaporized zinc affects weld pool stability and spatter. Resistance spot welding or zinc edge grinding is recommended for clean joints.
T2 Pure Copper, C110, H62, H65 Brass
High thermal conductivity requires high energy density (such as fiber laser welding) or silver brazing. Joint feasibility is evaluated based on sheet thickness and application.
From heavy-duty structural machine frames to clean-finished cosmetic electronics housings, explore our custom welded assemblies engineered for strength and precision.
Welded brackets, reinforcement braces, and heavy-duty structural frames designed to provide reliable load-bearing support, rigidity, and mechanical stability.
Precision-welded electronic chassis and multi-side enclosure bodies built to house internal PCB components securely while maintaining tight interface tolerances.
Robust electrical cabinets and automation control boxes featuring clean, sealed weld seams designed to protect sensitive internal electrical equipment.
Custom equipment faceplates, exterior side panels, and protective covers fabricated with smooth, high-cosmetic weld finishes and corner blending for industrial devices.
Safety machinery guards and reinforced mounting trays built to withstand rigorous industrial operational environments and secure moving automation components.
Specialized stainless steel and aluminum enclosures engineered for chemical corrosion resistance, cleanroom compliance, and lightweight structural performance.
Welding introduces localized heat, shrinkage, and residual stress. TENGHUI controls assembly precision and eliminates distortion through a structured 5-step engineering process.
Material specifications, weld symbols, joint clearances, weld sizes, assembly tolerances, and cosmetic face requirements are systematically verified before production starts.
Joint gaps, sheet alignment, torch access angles, and critical interface dimensions are validated on rigid modular clamping fixtures before any arc strikes occur.
Welding wattage, pulse current, travel speed, shielding gas flow rates, matched filler wires, and skip-welding sequences are calibrated to minimize heat-affected zones.
The initial welded assembly is inspected for bead profile, dimensional stability, post-weld angular distortion, and assembly mating before batch replication begins.
All accessible seams are visually checked for continuity, undercut, porosity, spatter, and burn-through. Critical flatness, squareness, and datums are verified per 2D prints.
Welded assembly accuracy depends on the cumulative interaction of raw materials, joint configurations, clamping fixtures, and thermal management during fabrication.
Base material thermal expansion rates and sheet/plate thicknesses directly influence localized heat distribution and volumetric shrinkage during the welding cycle.
Overall envelope dimensions, open-profile complexity, and asymmetrical spatial geometry dictate how cumulative residual stresses cause global thermal bowing or twist.
Fillet vs. groove joint types, total deposited seam length, and spatial placement relative to the neutral axis determine the concentration and symmetry of shrinkage forces.
Choosing between continuous hermetic seal welds and intermittent stitch/tack welding directly impacts overall heat input, cycle time, and total structural distortion.
Heavy-duty dedicated clamping fixtures and verified locating pins physically restrain dynamic movement and preserve tight relative component alignment while cooling.
Strict GD&T callouts for surface flatness, flange parallelism, and 90° squareness require balanced alternating weld passes and post-weld straightening operations.
Post-weld abrasive grinding, flush seam blending, or grain restoration can subtly alter local wall thickness and interface planes, which must be factored into finished tolerance planning.
Clear, standardized 2D drawings paired with 3D CAD models prevent fit-up ambiguity, accelerate engineering DFM review, and ensure precise welding execution.
Accurate base metal callouts and joint geometric parameters allow our welding engineers to select the exact torch setup, filler metal, and thermal sequence.
Specify the precise base alloy grade (e.g., SUS304, Al 5052-H32, SPCC) and exact sheet or plate thickness required for all welded assembly details.
Clearly indicate the specific welding method, leg/throat seam dimensions, total weld length, and exact spatial placement along all joint interfaces.
Define whether the joints require continuous full-seam liquid-tight sealing or structured intermittent stitch welding with pitch and length callouts.
TENGHUI offers a comprehensive suite of metal fusion and joining solutions, including:
The optimal welding process depends on part geometry, strength criteria, and cosmetic goals:
Our engineering team confirms the final process recommendation during pre-production DFM review.
We routinely weld carbon steels (SPCC, SPHC, Q235, Q355), stainless steels (SUS301, SUS304, SUS316/316L), and aluminum alloys (5052, 5754, 5083, 6061). Specialized projects involving galvanized steel (SECC/SGCC), copper, brass, or titanium are reviewed individually to evaluate joint feasibility, shielding gas requirements, and zinc-coating mitigation.
We mitigate localized thermal expansion and residual stress through structured engineering controls: rigid modular clamping fixtures, precision laser-cut fit-up tolerances, staggered tack-welding, symmetrical skip-welding sequences, and precise heat-input management (pulse current / fiber laser parameters).
Yes. Mechanical flush grinding, corner seam dressing, and cosmetic surface blending (brushed or grain restoration) are standard post-weld options. Please clearly indicate Class-A visible exterior surfaces and required seam blending callouts on your 2D drawings so we can plan grinding allowances and surface finishing operations accordingly.
To receive a detailed quote and welding DFM assessment within 24 hours, please provide:
If you have any questions or would like to book a session please contact us.
Once we receive your design files, our senior manufacturing engineers will manually perform a comprehensive DFM review and deliver an accurate, optimized quote within 24 hours.
