Han's Laser Delivers First X-Pin Hairpin Stator Laser Welding Machine For Mass Production

Han’s Laser has completed and delivered the first X-Pin hairpin stator laser welding machine, marking a major milestone in the industrialization of electric motor manufacturing. The successful delivery demonstrates a significant breakthrough in high-end equipment for new energy vehicle motors and provides a practical production solution for large-scale manufacturing of high-performance X-Pin hairpin stators.

As the automotive industry pushes toward lighter, more efficient, and higher power-density motors, X-Pin hairpin stator technology has become an important development direction. However, the transition from laboratory validation to mass production has remained difficult due to the complexity of the welding process.

Why X-Pin Hairpin Stators Are Difficult to Manufacture
Compared with conventional hairpin stator designs, X-Pin structures offer a more compact layout and higher electromagnetic efficiency. These advantages make them highly attractive for electric vehicle traction motors.

However, X-Pin production introduces several manufacturing challenges:

• No straight welding section, making weld path control extremely difficult
• Strict heat-affected zone requirements that demand highly precise thermal control
• Irregular terminal geometry that complicates clamping and positioning

For years, these issues have limited yield rates, slowed production ramp-up, and prevented broader industrial adoption.

A Flexible Laser Welding Machine Designed for Multi-Model Production
To address these challenges, Han’s Laser developed a dedicated X-Pin hairpin stator laser welder that combines precision positioning, intelligent sensing, process protection, and flexible manufacturing capability in one platform.

The system is designed to support mainstream stator core sizes and multiple slot-count configurations, allowing manufacturers to process different motor models on the same production line.

Its transfer mechanism is driven by a high-precision servo system with adjustable positioning, enabling rapid tooling changeovers and mixed-model production. This flexible architecture helps manufacturers respond more quickly to changing production requirements without sacrificing throughput.

Solving the Three Core Challenges of X-Pin Welding
1. Precise Path Control for Complex Weld Geometry
One of the biggest difficulties in X-Pin welding is the absence of a straight welding section. To solve this, the machine integrates a multi-axis galvanometer motion system capable of welding from multiple directions and angles.

The equipment also supports inclined welding, which reduces the risk of laser energy loss and improves weld formation consistency in confined or irregular spaces.

2. Accurate Heat Input Control to Protect Insulation
Because X-Pin stators have very strict heat-affected zone requirements, thermal control is critical. Excessive heat can damage the insulation coating on the copper wire and reduce long-term motor reliability.

Han’s Laser addresses this issue with a ring-shaped beam laser source. The center beam provides sufficient penetration depth, while the surrounding ring beam preheats and gradually cools the material.

This controlled energy distribution allows the laser welding machine to:

• Maintain strong weld joints
• Minimize heat damage
• Protect the insulation layer
• Improve overall process stability

Mechanical pull-force testing has confirmed that the weld strength meets demanding reliability standards for new energy vehicle motors

3. Reliable Clamping and Positioning for Irregular Structures
The irregular end geometry of X-Pin stators makes accurate positioning especially difficult. To overcome this, the laser welding equipment uses an internal stator expansion centering mechanism combined with a high-precision rotary positioning system.

This design ensures:
A modular quick-change structure further improves setup efficiency while maintaining precise repositioning accuracy during product changeovers.

Intelligent Sensing and AI-Assisted Process Control
The X-Pin laser welding machine integrates both 2D and 3D vision systems to identify and position each pin with high precision.

The system supports zoned welding strategies, allowing different areas of the stator to be processed according to their specific geometry and welding requirements.

In addition, welding data is uploaded and stored locally in real time, providing complete traceability throughout the production process.

Multiple Protection Systems for Cleaner, More Stable Production
To manage welding spatter and protect sensitive components, the equipment incorporates several layers of protection:
Together, these features create a cleaner production environment and improve equipment durability.

Full-Process Monitoring and Secure Process Management
The machine includes a built-in high-definition monitoring system that allows operators to observe the welding process in real time from an external display.

The welding software also features multi-level permission management, ensuring that process parameters remain secure and controlled. This supports the detailed process management required in modern intelligent manufacturing facilities.

A New Solution for Industrializing X-Pin Motor Technology
The successful delivery of this X-Pin hairpin stator laser welding machine represents more than a single equipment milestone. It demonstrates that the long-standing challenges of X-Pin industrialization can now be addressed with a scalable and repeatable manufacturing solution.

By combining advanced laser processing, intelligent sensing, precision positioning, and flexible automation, Han’s Laser has created a production-ready platform capable of supporting the next generation of high-performance electric motors.

As the new energy industry continues to grow, Han’s Laser will continue advancing its core laser technologies and intelligent equipment integration capabilities to help manufacturers achieve higher efficiency, better quality, and faster production scaling.

• Stable clamping of irregular workpieces
• Accurate center positioning
• High repeatability between cycles
• Air knife system to protect optical components
• Shielding plate to block weld debris and protect the stator
• Following dust extraction unit to remove smoke and particles
• Shielding gas system to stabilize the welding process