Robot Welding

Product Introduction

Robot Welding by Hehua Machinery Technology (Kunshan) Co., Ltd. provides automated and precision welding services for industrial machinery, equipment frames, structural components, pressure assemblies, and customized metal parts. The service combines robotic welding with professional MIG, MAG, TIG, spot, fillet, submerged arc, and other welding processes.

The production team supports carbon steel, galvanized steel, stainless steel, aluminum alloy, cast iron, ductile iron, copper alloy, and selected dissimilar metal combinations. From drawing review and fixture fabrication to welding, straightening, CNC secondary machining, inspection, and surface finishing, customers can obtain an integrated OEM/ODM welding solution.

Key Product & Service Advantages

Automated Robot Welding

Robotic welding cells are available for repeatable mass production, helping maintain stable weld quality, consistent dimensions, and production efficiency. Manual welding stations are also available for prototypes, complex structures, and small-batch orders.

Multiple Welding Processes

Available welding processes include:

• MIG/MAG and CO2 welding

• TIG/GTAW argon welding

• Spot welding

• Fillet welding

• Submerged arc welding

• Brazing

• Robotic automatic welding

The welding method is selected according to material, plate thickness, structural load, appearance requirements, and production volume.

Wide Material Compatibility

The service supports:

• Carbon steel

• Galvanized steel

• 304/316 stainless steel

• Aluminum alloy

• Cast iron

• Ductile iron

• Copper alloy

• Selected dissimilar metals

Material test certificates and material traceability can be provided according to project requirements.

One-Stop OEM & ODM Welding

Customers can provide drawings, physical samples, or raw materials. The complete service can include blanking, welding fixture fabrication, welding, straightening, CNC secondary machining, grinding, and surface finishing.

The service supports prototype samples, small batches, and large-volume production.

Precision & Quality Control

The welding process is supported by dimensional and weld-quality inspection throughout production.

Key capabilities include:

• Overall dimensional tolerance: ±0.1–±0.3 mm

• Flatness after straightening: ≤0.03 mm/100 mm

• Weld inspection for porosity, slag inclusion, and cracks

• Air tightness testing for pressure components

• Water tightness testing when required

• First article dimensional inspection

• Periodic batch inspection

• NDT inspection for critical weldments

MT magnetic particle inspection, UT ultrasonic testing, and hydrostatic testing are available for qualified applications.

Post-Weld Processing

After welding, assemblies can undergo straightening, deburring, grinding, and other secondary operations to achieve the required dimensions and surface condition.

Available surface treatments include:

• Shot blasting

• Black oxide

• Electrophoresis

• Dacromet

• Powder coating

• Galvanization

• Anodizing

• Polishing

These options support both functional corrosion protection and appearance requirements.

Drawing & Reverse Engineering Support

Hehua accepts multiple engineering file formats, including:

• 2D CAD

• 3D STEP

• IGS

• SolidWorks

• UG

For customers without complete drawings, reverse engineering can be performed from physical samples. The team can also support reproduction of discontinued weldments, imported replacement parts, structural optimization, and welding deformation analysis.

Drawing reviews can be completed within 24 hours under standard project conditions.

Typical Applications

Robot Welding and customized welding services are suitable for:

• Compressor frames

• Construction machinery brackets

• Equipment bases

• Welded sheet metal housings

• Pressure pipe assemblies

• Industrial machinery structures

• Heavy-duty steel frames

• Aluminum components

• Stainless steel enclosures

• Semiconductor equipment structures

• New energy equipment

• Rail transit components

• Wind power equipment

• Aerospace-related metal components

• Customized industrial weldments

Production Capacity

Hehua operates manual welding stations and automated robotic welding cells with supporting cutting, straightening, polishing, CNC, and surface treatment capabilities.

• Monthly capacity: up to 30,000 sets

• Sampling time: approximately 3–7 days

• Standard delivery: approximately 12–25 days

• Rush orders: priority scheduling available

• On-time delivery rate: ≥98%

Integrated stamping, CNC machining, and welding services are available for projects requiring multiple manufacturing processes.

Custom Welding Process

1. Drawing or Sample Review

Customers provide 2D/3D drawings, samples, specifications, or raw materials.

2. DFM & Process Analysis

Engineers review weldability, deformation risks, joint design, material selection, and production requirements. Welding DFM optimization can help reduce deformation and rejection.

3. Fixture Fabrication

Dedicated welding fixtures can be designed and manufactured for repeatable positioning during batch production.

4. Welding Production

The appropriate manual or robotic welding process is selected based on the component design and production volume.

5. Straightening & Secondary Machining

Welded assemblies undergo straightening, deburring, CNC machining, grinding, or other required operations.

6. Quality Inspection

Dimensional inspection, weld inspection, air tightness testing, and NDT can be performed according to product requirements.

7. Surface Treatment & Delivery

The finished weldment can receive the required surface treatment before packaging and shipment.

Quality Certifications

Hehua Machinery Technology (Kunshan) Co., Ltd. operates under a certified quality management system and has obtained:

• ISO 9001 quality management system certification

• IATF 16949 automotive quality system certification

• EN 15085 rail vehicle and parts welding system certification

• EN 9606-1 welder qualification certification

For critical welded components, inspection documentation and NDT reports can be supplied according to project requirements.

After-Sales Technical Support

Technical support covers welding fixture design, process optimization, overseas assembly support, welding defect analysis, rework, and straightening.

• Domestic after-sales response: within 24 hours

• Overseas remote technical support: within 72 hours

• Continuous process optimization for mass production

• Rework support for qualified non-artificial welding defects during the warranty period

Why Choose Hehua Robot Welding?

• Robotic and manual welding capabilities

• Multiple welding process options

• Wide range of weldable metals

• OEM and ODM production support

• Drawing and sample-based manufacturing

• Reverse engineering capability

• Integrated CNC and post-weld processing

• Precision dimensional control

• Air tightness and NDT inspection

• Flexible small-batch and mass production

• Monthly capacity up to 30,000 sets

• ISO 9001 and IATF 16949 certified systems

• EN 15085 welding system certification

• Export-oriented quality and documentation support

Company Profile

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

The company was established as a subsidiary of Shanghai Hehua Machinery Technology Co., Ltd., which was founded in 2005. The Kunshan facility was established in 2018 and covers more than 17,800 m², with over 160 employees and annual sales exceeding RMB 110 million.

With integrated welding, machining, stamping, finishing, and quality inspection capabilities, Hehua provides customized metal components and structural assemblies for industrial equipment manufacturers and overseas OEM customers.

For customized Robot Welding projects, customers can submit drawings, samples, material specifications, required tolerances, production quantities, and surface treatment requirements for technical evaluation and quotation