Nanocrystalline magnetic core winding method for spot welding in winding process

By fixing the shape of the nanocrystalline magnetic core during the winding process, the problem of the preparation of small stack thick and large-size magnetic cores in the prior art requires special customization of internal molds and fixtures, and low-cost and high-efficiency magnetic core preparation and maintenance are achieved.

CN119724904APending Publication Date: 2025-03-28GUANGZHOU JINCIHAINA NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202510063010.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-15
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

In the prior art, when preparing nanocrystalline magnetic cores with extremely large outer diameter and extremely small stack thickness, it is necessary to specially customize metal inner molds and fixtures, resulting in high cost and complex operation.

Method used

Spot welding technology is used during the winding process. By making a winding inner mold of suitable size, the strip is wound and a continuous and uniform micro solder joint is formed during the process to fix the core shape.

Benefits of technology

This method does not require special preparation of internal support tools, which are low in cost and simple in operation. It can achieve high retention force characteristics of the magnetic ring, and can directly perform annealing and magnetic field heat treatment to improve production efficiency.

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Abstract

The invention discloses a nanocrystalline magnetic core winding method for spot welding in the winding process, and the method comprises the following steps: S1, manufacturing a winding inner mold according to the size requirement; s2, the winding inner mold is installed on a winding machine, then the strip is wound on the outer side of the winding inner mold, and the winding inner mold rotates to start to wind the strip; s3, in the winding process, a spot welding electrode is clamped to make continuous contact with the surface of the strip, so that welding spots are formed; s4, after the strip is wound to the designed size, winding is stopped, winding is ended, and the strip is wound and subjected to spot welding to form a magnetic core; s5, the magnetic core is taken down, and the magnetic core is annealed in an annealing furnace; and S6, finally, the magnetic core is transferred to the rear-section assembling, detecting, packaging and shipping procedures. Compared with a conventional method for preparing a small-stack-thickness and large-size magnetic ring, the winding method provided by the invention has the advantages that a spot welding method in winding does not need to specially prepare an inner support jig, so that the method is low in cost, the winding process is optimized, the operation is simple and convenient, and the magnetic ring can obtain the characteristic of high retention force.
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