Preparation method of motor iron cores

A technology of iron core and soft magnetic metal, applied in the field of preparation of motor iron core, can solve the problems of slow processing speed, damage, edge drop, etc. Effect

Inactive Publication Date: 2016-10-19
白国华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In summary, it can be found that the current methods of using amorphous and nanocrystalline soft magnetic materials to prepare motor cores are based on punching, wire cutting, drilling, grinding wheel processing and other mechanical pr

Method used

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  • Preparation method of motor iron cores
  • Preparation method of motor iron cores
  • Preparation method of motor iron cores

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preparation example Construction

[0029] The preparation method of the motor iron core of the present invention is to laminate the soft magnetic metal strips, cut the laminates with a laser after fixing, stack the strip slices to a certain thickness, perform atmosphere annealing, solidify the adhesive, and spray paint. The invention has the advantages of high machining precision for preparing motor iron cores by laser cutting, no burr, small internal stress, and can process motor iron cores with complicated shapes. Using the laser method to prepare the motor core can simplify the production process, increase the processing speed and reduce the cost, and has broad application prospects in the field of high-speed motor manufacturing.

[0030] The present invention adopts concrete steps as follows:

[0031] 1) Soft magnetic metal strip lamination, fixed

[0032] One of the silicon steel strips, iron-based amorphous strips, iron-cobalt-based amorphous strips, and iron-based nanocrystalline strips is transversely ...

Embodiment 1

[0041] The FeSiB amorphous strip, with a width of 213mm and a thickness of 30um, is cut into 2m long fragments and laminated in a jig with a thickness of 5mm. figure 1 The lamination clamps shown are clamped to obtain a strip lamination. Place the strip lamination on the laser gun of the fiber laser, focus the laser light, and incident it vertically on the soft magnetic metal strip lamination. At the same time, pass the coaxial air. The laser power is 800W, and the cutting speed is 30m / min. figure 2 A section of soft magnetic metal strip is shown. Take advantage of image 3 In the mold shown, the soft magnetic metal strip slices are stacked to the design height of the iron core, clamped, and annealed in a nitrogen atmosphere. The annealing temperature is 250°C and the annealing time is 1h. Put the annealed iron core into the adhesive solution for 1 hour, so that the adhesive penetrates into the single-layer laminate. The adhesive solution is an alcohol solution of epoxy res...

Embodiment 2

[0044] The FeSiB amorphous strip, with a width of 170mm and a thickness of 30um, is cut into 2m-long pieces and laminated in a jig with a thickness of 3mm. figure 1 The lamination clamps shown are clamped to obtain a strip lamination. Place the strip lamination on the laser gun of the YAG laser, focus the laser, and incident it vertically on the soft magnetic metal strip lamination. At the same time, coaxial oxygen is passed through. The laser power is 500W and the cutting speed is 20m / min. figure 2A section of soft magnetic metal strip is shown. Take advantage of image 3 In the mold shown, the soft magnetic metal strip slices are stacked to the design height of the iron core, clamped, and annealed in an argon atmosphere. The annealing temperature is 300°C and the annealing time is 1.5h. Put the annealed iron core into the adhesive solution for 1.5h, so that the adhesive penetrates into the single-layer lamination. The adhesive solution is an acetone solution of epoxy resi...

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Abstract

The invention discloses a preparation method of motor iron cores. The preparation method mainly comprises the steps that 1, a soft magnetic metal strip is laminated and fixed; 2, lamination is cut by lasers to obtain strip slices; 3, the strip slices are stacked to a certain thickness, and atmosphere annealing is conducted; 4, the strip slices are immersed into a bonding agent for curing, and paint spraying is conducted. The preparation method has the advantages the motor iron cores are prepared through laser cutting, the machining precision is high, no rough edge exists, small internal stress is generated, and the motor iron cores in complex shapes can be machined. By preparing the motor iron cores through the laser method, the production technology can be simplified, the machining speed is increased, the cost is reduced, and the method has a wide application prospect in the field of high-speed motor manufacturing.

Description

technical field [0001] The invention relates to a method for preparing a motor iron core, in particular to a motor iron core prepared by a laser cutting method, and belongs to the technical field of motor design and manufacture. Background technique [0002] Traditional motor iron cores are generally made of silicon steel sheets using a punching method. The thickness of the silicon steel sheet is above 500um. Due to the low resistivity of the silicon steel sheet and the large thickness of the silicon steel sheet, it can only be used at low frequencies. With the development of technologies such as electric vehicles and magnetic recording in recent years, it is increasingly necessary for the motor to work at a frequency of several hundred hertz. Under this working condition, the thickness of the laminated sheets of the motor core is required to be as thin as possible, and the resistivity is as high as possible, so as to reduce loss and heat generation of the motor. Therefore,...

Claims

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Application Information

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IPC IPC(8): H02K15/02H02K15/12
CPCH02K15/02H02K15/12H02K2213/03
Inventor 白国华
Owner 白国华
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