MIG Welding

Product Introduction

For industrial metal fabrication projects requiring strong joints, consistent quality and scalable production, MIG Welding provides a flexible solution for carbon steel, stainless steel, aluminum, cast iron and other weldable metals.

The service supports drawing-based, sample-based and raw-material processing, covering welding, fixture fabrication, blanking, straightening, CNC secondary machining and surface finishing. Both manual and robotic welding are available for prototype, small-batch and mass-production requirements.

Welded assemblies can be supplied with dimensional inspection, weld quality inspection, air tightness testing and applicable non-destructive testing. Post-weld grinding, straightening and surface treatment are also available to provide ready-to-use components for industrial machinery and equipment manufacturing.

Key Service Advantages

One-Stop OEM & ODM Welding

MIG Welding supports custom processing based on 2D drawings, 3D models, physical samples or supplied raw materials.

The integrated service can include:

• Material preparation and blanking

• Welding fixture fabrication

• MIG/MAG welding

• TIG welding

• Spot welding

• Robotic welding

• Post-weld straightening

• CNC secondary machining

• Grinding and deburring

• Surface finishing

• Final inspection and packaging

This integrated workflow reduces the need for multiple suppliers and supports both prototype development and recurring bulk production.

Multiple Metal Materials

The available material range includes:

• Carbon steel

• Galvanized steel

• 304 stainless steel

• 316 stainless steel

• Aluminum alloy

• Cast iron

• Ductile iron

• Copper alloy

• Selected dissimilar metal combinations

Material selection can be matched to structural strength, corrosion resistance, weight, operating environment and application requirements.

Material test certificates can be provided, while material traceability is available for applicable production orders.

Multiple Welding Processes

The welding capability covers different processes according to material, thickness, joint structure and appearance requirements:

• MIG/MAG welding

• CO₂ welding

• TIG/GTAW argon welding

• Spot welding

• Fillet welding

• Submerged arc welding

• Brazing

• Robotic automatic welding

For each project, the welding process can be selected according to plate thickness, load requirements, joint design, dimensional requirements and appearance expectations.

Manual and Robotic Welding

Manual welding stations support customized and low-to-medium volume projects, while robotic welding cells are available for standardized high-volume production.

This combination allows the production process to accommodate prototypes, small orders, recurring batches and long-term OEM programs.

Dimensional and Weld Quality Control

The stated overall dimensional tolerance is approximately ±0.1–±0.3mm, with post-straightening flatness up to ≤0.03mm/100mm under applicable production conditions.

Welds are inspected for common defects including:

• Porosity

• Slag inclusion

• Cracking

• Incomplete weld quality

• Dimensional deformation

Pressure-related welded assemblies can undergo air tightness, water tightness or hydrostatic testing according to project requirements.

Welding Service Capabilities

Applications

Compressor Frames

Welded frames and structural components can be manufactured for compressor equipment, including heavy-duty frames and pressure-related housings.

Construction Machinery Components

The service supports brackets, equipment bases, load-bearing structures and other welded metal components used in construction machinery.

Industrial Equipment Frames

Custom welded structures can be produced for industrial machinery, equipment bases, housings and supporting assemblies.

Pressure Welded Assemblies

For applicable pressure parts, additional air tightness, water tightness, hydrostatic and NDT inspection can be arranged according to technical requirements.

Sheet Metal Structures

Thin and medium-thickness sheet metal assemblies can be processed with attention to appearance, deformation control and dimensional accuracy.

Heavy-Duty Structural Parts

Carbon steel, stainless steel, cast iron and ductile iron welding capabilities support structural components requiring high load-bearing performance.

Equipment and Spare Parts

Drawing-based production and reverse engineering are available for non-standard equipment components, legacy weldments and replacement parts.

Precision and Deformation Control

Welding heat can cause dimensional changes and structural deformation. To control these effects, the production process can include welding sequence optimization, fixture design, post-weld straightening and dimensional inspection.

Before production, engineers can review drawings and evaluate potential risks related to welding deformation, cracking and joint accessibility.

For applicable projects, free welding DFM optimization is available to help improve manufacturability and reduce deformation and rejection rates.

Drawing and Reverse Engineering Support

The service is compatible with common engineering drawing and 3D model formats, including:

• 2D CAD

• STEP

• IGS

• SolidWorks

• UG

For customers without complete drawings, physical samples can be used for reverse engineering and reproduction of existing welded components.

This capability is applicable to:

• R&D prototypes

• Imported assembly replacement

• Legacy equipment parts

• Non-standard machinery frames

• Spare-part reproduction

• Structural cost optimization

Drawing review can be completed within approximately 24 hours for applicable projects.

Quality Control

Hehua Machinery Technology (Kunshan) Co., Ltd. operates an established quality management system supporting inspection from incoming materials through finished welded assemblies.

Quality control can include:

1. Incoming material inspection

2. Material identification and traceability

3. Welding process inspection

4. Patrol inspection during production

5. Post-weld straightening inspection

6. First-article dimensional inspection

7. Periodic batch inspection

8. Weld appearance inspection

9. Air tightness testing

10. Water tightness testing

11. MT magnetic particle testing

12. UT ultrasonic testing

13. Hydrostatic testing where required

14. Final inspection and documentation

Inspection reports and applicable testing certificates can be supplied with shipments according to order requirements.

Certifications and Welding Qualifications

The production organization has obtained:

• ISO 9001 Quality Management System Certification

• IATF 16949 Automotive Quality System Certification

• EN 15085 Rail Vehicle and Components Welding System Certification

• EN 9606-1 qualified welders

These certifications and qualifications support applications involving automotive, rail transit and other industrial equipment manufacturing requirements.

Post-Weld Surface Treatment

To provide finished components suitable for different operating environments, a range of post-weld treatments is available:

• Grinding

• Deburring

• Straightening

• Shot blasting

• Black oxide

• Electrophoresis

• Dacromet

• Powder coating

• Galvanization

• Anodizing

• Polishing

Surface treatment can be selected according to corrosion resistance, appearance, wear resistance and application environment.

For outdoor or corrosion-sensitive components, applicable salt spray test reports can be provided upon request.

Production and Delivery

The production facility combines manual welding stations with automated robotic welding cells and supporting processing equipment for cutting, straightening and polishing.

Monthly production capacity can reach up to 30,000 sets, supporting both small-batch custom orders and long-term bulk production programs.

Typical standard orders can be completed within 12–25 days, while urgent projects may receive priority scheduling subject to production capacity and technical requirements.

Export documentation and customs clearance documents can be prepared for applicable international orders.

Custom OEM & ODM Process

A typical custom welding workflow includes:

1. Drawing or Sample Review
Provide drawings, 3D files, samples or raw material information for technical evaluation.

2. DFM and Process Review
Engineers review weld joints, material selection, fixture requirements, deformation risks and machining requirements.

3. Prototype Sampling
Samples can be produced within approximately 3–7 days for applicable projects.

4. Welding Production
The appropriate manual, semi-automatic or robotic welding process is selected according to the product structure and order volume.

5. Post-Weld Processing
Straightening, grinding, CNC machining and surface treatment are completed according to requirements.

6. Inspection
Dimensional, weld quality, airtightness and NDT inspections are performed where specified.

7. Packing and Delivery
Finished assemblies are prepared with applicable inspection and export documentation.

After-Sales Technical Support

Technical support covers fixture design, welding process optimization, production improvement and defect correction.

For overseas buyers, remote technical support is available for production matching, assembly requirements and process adjustments. Domestic after-sales responses are available within 24 hours, while overseas remote technical support is targeted within 72 hours.

For non-artificial welding defects covered by the warranty terms, applicable rework support can be provided.

Company & Manufacturing Capability

Hehua Machinery Technology (Kunshan) Co., Ltd. is a metal component and high-end equipment manufacturing company serving automotive, rail transit, aerospace, wind power, nuclear power, industrial machinery, semiconductor equipment and new energy equipment applications.

Shanghai Hehua Machinery Technology Co., Ltd. was established in 2005, with Hehua Machinery Technology (Kunshan) Co., Ltd. established in 2018. The Kunshan facility covers more than 17,800 square meters and employs more than 160 people.

The company reports annual sales exceeding RMB 110 million and maintains production and quality systems for customized metal parts and welded assemblies.

B2B Custom Welding Supply

The service is suitable for equipment manufacturers, machinery companies, engineering contractors, OEM buyers, spare-parts distributors and industrial procurement teams requiring customized welded metal components.

Buyers can provide drawings, 3D files, physical samples or material specifications for quotation and technical evaluation. Production can be arranged for prototypes, small batches, recurring orders and mass-production programs.

Product Summary

MIG Welding provides custom metal welding and fabrication for industrial frames, brackets, equipment housings, pressure assemblies and structural components, with multiple welding processes, robotic production, precision inspection, NDT and post-weld surface treatment available.