TIG Welding

Product Introduction

TIG Welding is a precision welding service for manufacturers requiring clean, strong and dimensionally controlled welded components. Hehua Machinery Technology (Kunshan) Co., Ltd. provides TIG/GTAW argon welding together with MIG/MAG, spot, submerged arc, brazing and robotic welding to meet different material, thickness and production requirements.

The service supports welding of carbon steel, stainless steel, aluminum alloy, cast iron, ductile iron and copper alloy. Customers can provide drawings, samples or raw materials for OEM and ODM processing, with integrated cutting, fixture fabrication, welding, straightening, CNC secondary machining and surface finishing.

Key Features

• Precision TIG/GTAW argon welding

• MIG/MAG and CO2 welding available

• Spot and robotic automatic welding

• Carbon steel, stainless steel and aluminum welding

• Cast iron, ductile iron and copper alloy processing

• Dissimilar metal welding available

• Custom OEM and ODM production

• Small-batch and mass production support

• Integrated post-weld machining and finishing

• Air and water tightness testing for pressure parts

• NDT inspection available for critical weldments

• Full material and quality traceability

TIG Welding Service

TIG welding uses a controlled arc and inert argon shielding to produce precise and clean welds. It is particularly suitable for stainless steel, aluminum alloy, thin sheet components and assemblies where weld appearance, dimensional accuracy and joint quality are important.

The welding process is selected according to material type, plate thickness, structural load, sealing requirements and appearance requirements. This helps achieve stable welding performance while reducing deformation, rework and rejection rates.

Materials We Weld

Carbon Steel: Suitable for equipment frames, machinery brackets, bases and heavy-duty structural components.

Stainless Steel 304/316: Suitable for corrosion-resistant enclosures, fluid equipment, food-related equipment and exposed assemblies.

Aluminum Alloy: Suitable for lightweight structures, equipment housings and components requiring high strength-to-weight performance.

Cast Iron & Ductile Iron: Suitable for specialized machinery and heavy-duty welded assemblies.

Copper Alloy: Available for applications requiring specific electrical or thermal characteristics.

Dissimilar metal welding can also be evaluated according to the material combination and technical requirements.

Welding Processes

OEM & ODM Welding

The TIG Welding service supports one-stop OEM and ODM manufacturing based on customer drawings, physical samples or supplied materials.

The complete process can include:

1. Drawing and technical review

2. Material preparation and blanking

3. Welding fixture fabrication

4. TIG or other process welding

5. Post-weld straightening

6. CNC secondary machining

7. Deburring and grinding

8. Surface finishing

9. Dimensional inspection

10. Packaging and delivery

Small prototype orders and large-volume production are both supported.

Precision & Quality Control

Hehua applies process controls throughout welding production. Overall dimensional tolerance can reach ±0.1 to ±0.3 mm, while post-straightening flatness can reach ≤0.03 mm/100 mm according to project requirements.

Weld quality is controlled to minimize defects such as:

• Porosity

• Slag inclusion

• Cracks

• Excessive deformation

• Dimensional deviation

For pressure-related welded components, air and water tightness testing can be performed. First-article inspection, periodic batch inspection and shipment inspection reports are available according to customer requirements.

Drawing & Sample Support

Customers can submit 2D CAD drawings or 3D files in formats including STEP, IGS, SolidWorks and UG. Reverse engineering from physical samples is also supported for legacy parts, replacement assemblies and non-standard equipment.

Before production, engineers review the design and identify potential welding deformation, cracking and manufacturability issues. Welding DFM optimization can be provided to improve production stability and reduce rejection rates.

Post-Weld Surface Treatment

To provide a complete finished component, post-weld treatments include:

• Grinding

• Straightening

• Shot blasting

• Black oxide

• Electrophoresis

• Dacromet

• Powder coating

• Galvanization

• Anodizing

• Polishing

Surface finishing can be selected according to corrosion resistance, appearance and application requirements. Salt spray testing reports can also be provided when required.

Production Capacity

The production system combines manual welding stations with robotic welding cells and supporting cutting, straightening and polishing workshops. Integrated stamping, CNC machining and welding enables one-stop component manufacturing.

• Monthly capacity: up to 30,000 sets

• Standard delivery: approximately 12–25 days

• Prototype sampling: approximately 3–7 days

• Rush production: priority scheduling available

• On-time delivery rate: ≥98%

Actual lead time depends on material, component complexity, order quantity and finishing requirements.

Typical Applications

Automotive Equipment: Structural components, brackets and machinery parts.

Rail Transit: Welded assemblies and structural components for rail vehicles and equipment.

Aerospace & Wind Power: Precision metal components and structural weldments.

Construction Machinery: Heavy-duty brackets, frames and equipment bases.

Industrial Machinery: Machine frames, housings and supporting structures.

Semiconductor Equipment: Precision racks and structural components for high-end equipment.

New Energy Equipment: Welded structures and equipment components.

Technical Service & Support

Hehua Machinery Technology (Kunshan) Co., Ltd. provides technical support throughout the manufacturing cycle, including fixture design, welding process optimization, deformation control and defective-part rework.

For overseas customers, remote technical support is available. Technical communication and process review are provided before production to help ensure that the finished weldments meet the required specifications.

Quality Certifications

The company has passed ISO 9001 quality management system certification, IATF 16949 automotive quality system certification and EN 15085 rail vehicle and components welding system certification. Its welders have also passed EN 9606-1 qualification certification.

Available quality services include material inspection, welding process inspection, dimensional inspection, MT magnetic particle testing, UT ultrasonic testing, air tightness testing and hydrostatic testing for applicable products.

Why Choose Our TIG Welding Service?

• Professional industrial welding experience

• Qualified welding personnel

• Multiple welding technologies

• Advanced robotic welding capability

• Strict dimensional and weld quality control

• OEM/ODM customization

• Prototype through mass production

• One-stop machining and surface treatment

• Material traceability and inspection documentation

• Support for automotive, rail, aerospace, energy and industrial equipment

FAQ

Q1: What materials can you TIG weld?
TIG welding is available for stainless steel, aluminum alloy and other suitable metal materials. Carbon steel and additional alloys can be processed using appropriate welding methods.

Q2: Can you manufacture according to our drawings?
Yes. Customers can provide 2D CAD, 3D STEP, IGS, SolidWorks or UG files. Physical sample-based reverse engineering is also available.

Q3: Do you support small orders?
Yes. Prototype, sampling, small-batch and mass-production orders are supported.

Q4: Can you provide surface treatment after welding?
Yes. Grinding, polishing, powder coating, galvanization, anodizing, electrophoresis and other finishing processes are available.

Q5: Can pressure welded parts be tested?
Yes. Air tightness, water tightness, hydrostatic and applicable NDT inspections can be arranged for pressure-related components.

Company Profile

Shanghai Hehua Machinery Technology Co., Ltd. was established in 2005, with Hehua Machinery Technology (Kunshan) Co., Ltd. established in 2018. The company specializes in key metal parts and components for automotive, rail transit, aerospace, wind power, nuclear power, industrial machinery, semiconductor equipment and new energy equipment.

The company operates a production facility of more than 17,800 m² with over 160 employees and annual sales exceeding RMB 110 million. Hehua Machinery Technology (Kunshan) Co., Ltd. combines welding, machining and finishing capabilities to provide customized metal component manufacturing for global industrial customers.

Product Summary

TIG Welding provides precision welding and integrated metal fabrication for stainless steel, aluminum, carbon steel and other industrial materials, with OEM/ODM support, robotic production, inspection and post-weld finishing. Hehua Machinery Technology (Kunshan) Co., Ltd. delivers customized welded components for demanding industrial equipment and machinery applications.