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Neodymium segment magnets (arc-shaped magnets) are widely used in various brushless motors, fans, and high-performance power tools and pump products. Due to the hard and brittle nature of this magnet material, a single machining method often struggles to simultaneously achieve both precision and yield rates. Currently, the industry commonly employs a combined machining process of wire cutting and form grinding.
First, wire cutting is primarily used for machining the straight edges and angles (curvature) of neodymium iron boron sector magnets. CNC wire cutting enables precise control over sector angles, ensuring symmetrical consistency between left and right edges and effectively eliminating angular deviations caused by manual cutting. Additionally, wire cutting is a non-contact machining method, making it more suitable for brittle materials like neodymium iron boron. This significantly reduces risks such as chipping and hidden cracks, laying a solid foundation for subsequent finishing operations.
After completing angle and contour machining, the inner and outer circles of the magnetic segments are typically processed using a profile grinding machine. Profile grinding enables single-pass finishing of the arc contours, resulting in more stable roundness, concentricity, and dimensional tolerances for both inner and outer circles. Thickness and parallelism are also more readily controlled.
Neodymium Fan Shaped Magnet
The above outlines the processing techniques for fan-shaped (arc-shaped) neodymium magnets: wire cutting + forming grinding. This represents the mainstream solution for motor magnet processing today. Should your company require such fan-shaped magnets or fan-shaped magnets with holes, please contact our website's online customer service for a quote and delivery schedule.
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