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Project Introduction: Special‑Purpose Projection‑Welding Machine for Motor Pole Shoes

Aug 27,2026

Motor pole shoes are core magnetic‑conducting components of new‑energy motor drive assemblies. Pole shoes are sensitive to welding heat input and deformation. Defects such as cold joints, uneven fusion and warpage‑deformation during welding readily bring about uneven motor magnetic circuits, operation jitter, increased noise and excessive temperature rise.

Developed for motor pole‑shoe welding conditions, the Haifei special‑purpose projection‑welding machine delivers dense weld spots and low workpiece deformation, effectively stabilizing motor magnetic‑circuit performance.

I Customer Background and Pain Points

The customer focuses on manufacturing stators‑rotors pole shoes, magnetic‑conducting accessories and other parts for new‑energy motors and servo motors.

Pain points of original welding processes:

1.Conventional welding features large heat‑affected zones. Workpieces easily suffer warpage and deformation under heat, causing uneven magnetic‑circuit gaps. Motors tend to produce jitter, abnormal noise and reduced energy‑efficiency during operation.

2.Unstable pressure and energy output of conventional equipment leads to inconsistent weld‑spot penetration, readily resulting in cold joints and insufficient strength.

3.Conventional welding easily causes spatter and surface oxidative burning damage.

4.Lack of process‑parameter system makes process solidification difficult; production data cannot be traced.

II Customer Requirements

1.Improve density and bonding strength of weld spots, stabilize workpiece fitting condition and reduce structural looseness and loosening problems.

2.Narrow welding heat‑affected zones and mitigate pole‑shoe warpage and deformation.

3.Balance welding pressure and energy output, unify weld‑spot penetration and structural strength, and reduce cold‑joint and weak‑weld defects.

4.Optimize welding forming effect, reduce spatter and surface burning damage; process data shall be storable and traceable.

III Custom‑Developed Solutions

Targeting customer requirements, the dedicated R&D team repeatedly tuned and optimized schemes considering welding difficulties of motor pole shoes.

1.Process verification: Conduct multiple groups of welding‑process tests for pole shoes of different specifications and structures. Optimize core parameters including welding pressure, energizing current, fusion duration and pressure‑hold cooling.

2.Equipment selection: Adopt special‑purpose projection‑welding machine for motor pole shoes. It features small heat‑affected zones to effectively mitigate pole‑shoe deformation. Welding pressure and energy output are smooth and balanced, producing full nuggets and uniform strength of weld spots.

3.Fixture design: Custom‑built exclusive positioning tooling for pole shoes effectively prevents workpiece offset and uneven gaps.

4.Core Advantages

Low deformation: free of deformation, stable magnetic circuit.

Firm weld spots: uniform weld spots, solid structure.

Good performance: low loss, consistent quality.

IV Delivery, After‑Sales Service and Customer Feedback

Pre‑acceptance and equipment inspection were completed. Continuous trial operation maintains stable welding pass rate. After commissioning, all original welding‑related production pain points are fully resolved. Timely, professional and thoughtful after‑sales service earns positive customer feedback.

V Haifei’s Mission of Meeting Customized Customer Demands

Haifei adheres to the philosophy of “Creating Value for Customers”. All work starts from customer requirements. What are your specific welding requirements? Do you need automation, integration or complete production‑line solutions? Please inform us, and Haifei will carry out targeted equipment R&D and customization for you.