Laser Welding

Product Introduction

Laser Welding service from Hehua Machinery Technology (Kunshan) Co., Ltd. provides customized metal welding and fabrication for industrial equipment, machinery components, structural assemblies and precision metal parts.

The welding capability covers carbon steel, galvanized steel, stainless steel, aluminum alloy, cast iron, ductile iron, copper alloy and selected dissimilar metal combinations. Depending on material, thickness, structure and application requirements, suitable welding processes can be selected from MIG/MAG, TIG, spot welding, fillet welding, submerged arc welding, brazing and robotic automatic welding.

For OEM and ODM projects, customers can provide 2D drawings, 3D CAD files, physical samples or raw materials. The service can integrate blanking, welding fixture fabrication, welding, straightening, CNC secondary machining and post-weld surface treatment into one production process.

Welded assemblies can undergo dimensional inspection, straightening, deburring, air tightness testing and other quality checks according to product requirements. For critical pressure components, NDT methods such as magnetic particle testing and ultrasonic testing are available.

Key Product & Service Advantages

1. One-Stop OEM & ODM Welding

Hehua supports welding projects from prototype development through mass production.

Available services include:

• Material preparation and blanking

• Welding fixture fabrication

• Manual welding

• Robotic automatic welding

• Straightening

• CNC secondary machining

• Deburring

• Grinding and polishing

• Surface treatment

• Final inspection

This integrated workflow helps reduce the need for multiple suppliers and simplifies production coordination.

2. Multiple Welding Processes

Different welding methods can be selected according to material, plate thickness, structural load and appearance requirements.

Available processes include:

• MIG/MAG welding

• CO2 welding

• TIG/GTAW argon welding

• Spot welding

• Fillet welding

• Submerged arc welding

• Brazing

• Robotic automatic welding

For high-volume standardized components, robotic welding cells can be used to improve production consistency.

3. Wide Range of Weldable Metals

The welding service supports various industrial metals, including:

• 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 product requirements.

Material test certificates and material traceability are available for applicable projects.

4. Welding for Structural and Pressure Components

The service covers both structural weldments and pressure-related assemblies.

Typical parts include:

• Compressor frames

• Construction machinery brackets

• Equipment bases

• Welded sheet metal housings

• Pressure pipe welded assemblies

• Heavy-duty machine frames

• Structural hardware

• Sealed equipment housings

• Industrial equipment components

For pressure parts, air tightness and water tightness testing can be arranged according to project requirements.

5. Dimensional and Weld Quality Control

Welded assemblies are inspected throughout production to control both dimensional accuracy and weld quality.

The stated overall dimensional tolerance is approximately ±0.1 to ±0.3 mm, depending on the part and process. After straightening, flatness can reach ≤0.03 mm/100 mm under applicable conditions.

Weld inspection focuses on preventing or identifying defects such as:

• Porosity

• Slag inclusion

• Cracks

• Deformation

• Dimensional deviation

• Leakage

First-article inspection and periodic batch inspection can be arranged, with inspection documentation supplied with shipments where required.

6. Drawing and Sample-Based Manufacturing

Customers can submit:

• 2D CAD drawings

• 3D STEP files

• IGS files

• SolidWorks files

• UG files

• Physical samples

Reverse engineering from physical samples is also available for suitable projects. This supports legacy weldment reproduction, imported-part replacement and non-standard equipment development.

Engineering teams can review drawings and identify potential welding deformation or cracking risks before production.

7. Manual and Robotic Production

The production system combines manual welding stations with automatic robotic welding cells.

Supporting production capabilities include cutting, straightening, polishing and integrated stamping, CNC machining and welding.

Monthly production capacity can reach up to 30,000 sets, supporting both prototype projects and long-term bulk production.

Welding Service Specifications

Actual tolerances, lead time and production capacity may vary according to material, geometry, welding process, order quantity and inspection requirements.

Welding Material Selection

Carbon Steel

Carbon steel is suitable for heavy-duty frames, equipment bases, brackets and structural assemblies where mechanical strength and structural rigidity are important.

Stainless Steel

304 and 316 stainless steel can be processed for equipment housings, enclosures, fluid-related equipment and applications requiring corrosion resistance.

Aluminum Alloy

Aluminum welding is suitable for lightweight structural components and equipment parts where weight reduction is an important consideration.

Cast Iron and Ductile Iron

Cast iron and ductile iron welding capabilities are available for selected industrial assemblies and repair or fabrication applications, subject to material and structural assessment.

Copper Alloy

Copper alloy welding is available for applicable industrial components. The welding process is selected according to the material characteristics and component design.

Welding Process Selection

The appropriate process is determined according to material, thickness, structural load, dimensional requirements and appearance.

For example, TIG welding can be selected when controlled welding and appearance requirements are important, while MIG/MAG welding is suitable for many structural and production applications. Spot welding can be used for suitable sheet metal structures, while robotic welding can be introduced for repeatable high-volume parts.

For each project, the engineering team can review the drawing and recommend a suitable welding process before production.

Welding Fixture and DFM Support

For custom projects, welding fixture design and fabrication are available.

Proper fixture design can help control assembly positioning, reduce welding deformation and improve repeatability during batch production.

Engineering support includes welding DFM review, with the stated goal of identifying potential deformation and rejection risks before production.

A dedicated engineer can communicate with customers regarding drawings, welding sequence, fixtures, material selection and production requirements.

Post-Weld Processing

After welding, additional processing can be arranged according to the final application.

Available services include:

• Straightening

• Deburring

• Grinding

• Polishing

• Shot blasting

• Black oxide

• Electrophoresis

• Dacromet

• Powder coating

• Galvanization

• Anodizing

These processes can be combined according to requirements for corrosion resistance, appearance, dimensional condition and operating environment.

Salt spray testing reports can be provided upon request for applicable surface treatment projects.

Quality Control

Hehua Machinery Technology (Kunshan) Co., Ltd. operates an ISO 9001 certified quality management system and applies inspection procedures throughout the production process.

Quality control can include:

1. Incoming material inspection

2. Material traceability

3. Welding process inspection

4. First-article inspection

5. Periodic batch inspection

6. Post-weld straightening inspection

7. Dimensional inspection

8. Weld appearance inspection

9. Air tightness testing

10. Water tightness testing

11. Magnetic particle testing

12. Ultrasonic testing

13. Final inspection

Inspection methods are selected according to the product structure, application and customer requirements.

Certifications and Welding Qualifications

The company has obtained ISO 9001 quality management system certification and IATF 16949 automotive quality system certification.

Its welding-related qualifications also include EN 15085 certification for rail vehicles and components, while welders have passed EN 9606-1 qualification certification.

These certifications and qualifications support production for automotive, rail transit and other industrial manufacturing applications.

Industries and Applications

The welding service can be used for components and assemblies in:

• Automotive equipment

• Rail transit

• Aerospace-related equipment manufacturing

• Wind power

• Nuclear power-related equipment

• Industrial machinery

• Semiconductor equipment

• New energy equipment

• Construction machinery

• Compressor equipment

• Industrial automation

• Equipment frames and racks

Typical products include machinery frames, brackets, housings, bases, pressure assemblies, structural components and customized equipment parts.

OEM & ODM Project Workflow

A typical custom welding project can follow the process below:

Step 1 — Drawing or Sample Submission
Provide 2D drawings, 3D files, samples or relevant technical specifications.

Step 2 — Engineering Review
The engineering team reviews material, geometry, welding method, deformation risks and production requirements.

Step 3 — Quotation
A quotation is prepared based on material, processing requirements, quantity and finishing requirements.

Step 4 — Prototype or Sample
Prototype samples can generally be arranged within 3–7 days depending on project complexity.

Step 5 — Inspection and Approval
The sample is inspected against the drawing and agreed requirements.

Step 6 — Mass Production
Approved parts move into manual or robotic production according to the selected process.

Step 7 — Post-Weld Processing
Straightening, grinding, machining and surface treatment are completed as required.

Step 8 — Final Inspection and Shipment
Final inspection reports and applicable testing documentation are prepared before shipment.

Production and Delivery Capacity

The production facility combines welding stations, robotic welding cells and supporting cutting, straightening and polishing capabilities.

Monthly capacity can reach up to 30,000 sets. Standard production orders are generally delivered within 12–25 days, while prototype projects can be completed in approximately 3–7 days depending on complexity.

Expedited production can be discussed for urgent projects.

For export orders, applicable customs clearance and shipping documents can be provided.

Company Profile

Hehua Machinery Technology (Kunshan) Co., Ltd. is a metal parts and components manufacturer serving high-end equipment manufacturing applications.

Shanghai Hehua Machinery Technology Co., Ltd. was established in 2005, while its subsidiary Hehua Machinery Technology (Kunshan) Co., Ltd. was established in 2018.

The company operates a plant covering more than 17,800 square meters and has over 160 employees. Its manufacturing capabilities support customers in automotive, rail transit, aerospace, wind power, nuclear power, industrial machinery, semiconductor equipment, new energy equipment and other industrial sectors.

The company provides key metal parts and components for equipment manufacturing and supports customized production for both prototype and volume requirements.

B2B Ordering Information

Before requesting a quotation, customers are recommended to provide:

• Product drawings

• 3D CAD files

• Material specification

• Part quantity

• Welding requirements

• Dimensional tolerances

• Surface treatment requirements

• Testing requirements

• Packaging requirements

• Delivery schedule

For a more accurate quotation, complete 3D files such as STEP or IGES together with 2D drawings can be provided.

FAQ

What welding processes do you offer?

The available processes include MIG/MAG, CO2 welding, TIG/GTAW, spot welding, fillet welding, submerged arc welding, brazing and robotic automatic welding.

What materials can be welded?

Supported materials include carbon steel, galvanized steel, 304/316 stainless steel, aluminum alloy, cast iron, ductile iron and copper alloy. Selected dissimilar metal welding is also available.

Can you manufacture from a sample?

Yes. Physical samples can be used for reverse engineering and reproduction of suitable welded assemblies.

Do you support OEM and ODM projects?

Yes. Customers can provide drawings, samples or raw materials, and the service can integrate blanking, fixture fabrication, welding, straightening, CNC machining and surface finishing.

Can you provide welding inspection reports?

Yes. Inspection documentation can be supplied according to project requirements. MT, UT, air tightness, water tightness and other applicable testing methods are available.

What is the prototype lead time?

Prototype samples generally take approximately 3–7 days, depending on part complexity, material and processing requirements.

What is the standard production lead time?

Standard orders are generally completed within 12–25 days, subject to quantity and project requirements.

Can welded parts receive surface treatment?

Yes. Available treatments include grinding, polishing, shot blasting, black oxide, electrophoresis, Dacromet, powder coating, galvanization and anodizing.

Can you provide engineering support before production?

Yes. Engineering review can cover welding process selection, fixture design, deformation risk and DFM optimization.

What happens if a welded part does not meet the agreed specifications?

The company states that nonconforming parts caused by manufacturing defects are subject to rework or replacement according to its quality policy and warranty terms.

Product Summary

Laser Welding provides customized welding and metal fabrication for industrial frames, housings, brackets, equipment bases and pressure assemblies, combining multiple welding processes, precision inspection, robotic production, post-weld treatment and OEM/ODM support.