CN111063534B - Manufacturing process of high-filling easy-cutting iron-based amorphous nanocrystalline alloy iron core - Google Patents

Manufacturing process of high-filling easy-cutting iron-based amorphous nanocrystalline alloy iron core Download PDF

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CN111063534B
CN111063534B CN201911251379.2A CN201911251379A CN111063534B CN 111063534 B CN111063534 B CN 111063534B CN 201911251379 A CN201911251379 A CN 201911251379A CN 111063534 B CN111063534 B CN 111063534B
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iron core
iron
working chamber
polymer resin
based amorphous
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CN111063534A (en
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甘章华
吴传栋
胡骞
朱昭峰
陈雨峰
卢志红
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New Materials Technology Co ltd Jiangsu Amorphd
Wuhan University of Science and Engineering WUSE
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Wuhan University of Science and Engineering WUSE
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15308—Amorphous metallic alloys, e.g. glassy metals based on Fe/Ni
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
    • H01F41/0226—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) from amorphous ribbons

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  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
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  • Dispersion Chemistry (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

The invention discloses a manufacturing process of a high-filling easy-cutting iron-based amorphous nanocrystalline alloy iron core, which is characterized by comprising the following steps of: s1, obtaining a circular iron core through conventional processes such as smelting, spraying amorphous thin strips, winding, vacuum annealing and the like; s2, the iron core in the S1 is placed into a working chamber, and the working chamber is a cylindrical container which is slightly larger than the iron core in size. Adding a high molecular resin adhesive, and immersing the iron core; s3, putting the working chamber together with the iron core and the polymer resin adhesive into a high-speed centrifugal swinging cylinder of a supergravity machine, setting the supergravity acceleration to be 800-3000 g, and then rotating at a high speed for 3-10 min; s4, taking out the working chamber, pouring out the residual polymer resin glue, and taking out the iron core; s5, placing the iron core on a flat workbench, and placing for 24-48h at room temperature to obtain the required iron core.

Description

Manufacturing process of high-filling easy-cutting iron-based amorphous nanocrystalline alloy iron core
Technical Field
The invention relates to the field of iron core processing, in particular to a manufacturing process of a high-filling easy-cutting iron-based amorphous nanocrystalline alloy iron core.
Background
The iron-based amorphous/nanocrystalline alloy iron core has high magnetic conductivity and low iron core loss, and is widely applied to the fields of high-precision transformers, high-frequency power supplies and the like. The manufacturing process of the iron-based amorphous/nanocrystalline alloy iron core generally comprises the steps of smelting to obtain a master alloy, obtaining an amorphous alloy thin strip through strip throwing, winding and forming, and carrying out vacuum annealing to realize the conversion of the amorphous alloy into the amorphous/nanocrystalline alloy. Generally, the iron-based amorphous/nanocrystalline alloy core is in the shape of a solid of revolution, such as a circular ring, an oval ring, a rectangle, a racetrack, and the like. The shape of the rotor is relatively troublesome when winding a multi-turn coil, so that in order to facilitate wire winding and reduce loss, a plurality of downstream enterprises put forward the requirement that the iron-based amorphous/nanocrystalline alloy iron core needs to be cuttable.
The iron-based amorphous ribbon has certain toughness, but the toughness is sharply reduced after the iron-based amorphous/nanocrystalline alloy is changed into an iron-based amorphous/nanocrystalline alloy state through vacuum annealing, the iron-based amorphous/nanocrystalline alloy is usually in a brittle state, can not be directly cut, and has cuttability after being subjected to curing treatment.
The solidification treatment is to fill polymer resin glue or other glue into gaps of the thin strip in the iron core, and to solve the brittleness problem of the iron-based amorphous/nanocrystalline alloy thin strip by using the toughness of the polymer resin glue. Therefore, it is required that air or vacuum is not present between the gaps of the amorphous/nanocrystalline alloy thin strips, and the gaps of the amorphous thin strips are filled with the polymer resin paste.
At present, the amorphous industry usually adopts a vacuum impregnation process to carry out curing treatment, namely, iron-based amorphous/nanocrystalline alloy subjected to vacuum annealing treatment is put into a vacuum chamber, then the vacuum chamber is vacuumized, and polymer resin adhesive is added, so that the polymer resin adhesive is infiltrated into gaps between thin strips of an iron-based amorphous/nanocrystalline alloy iron core in a vacuum state. Because the thin band gap of the iron-based amorphous/nanocrystalline alloy iron core is very small and is usually only several micrometers, the high polymer resin adhesive is not easy to fill. If not filled, then amorphous/nanocrystalline alloy chips may be generated upon cutting.
In view of the foregoing, there is an urgent need for a technology capable of effectively filling a thin gap of an iron-based amorphous/nanocrystalline alloy core with a polymer resin paste to obtain an iron-based amorphous/nanocrystalline alloy core with a high filling rate and easy cutting.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a manufacturing process of a high-filling easy-cutting iron-based amorphous nanocrystalline alloy iron core with high filling rate and easy cutting.
In order to achieve the above object, the present invention adopts the following technical solutions:
a manufacturing process of a high-filling easy-cutting iron-based amorphous nanocrystalline alloy iron core is characterized by comprising the following steps:
s1, obtaining a circular iron core through conventional processes such as smelting, spraying amorphous thin strips, winding, vacuum annealing and the like;
s2, the iron core in the S1 is placed into a working chamber, and the working chamber is a cylindrical container which is slightly larger than the iron core in size. Adding a high molecular resin adhesive, and immersing the iron core;
s3, putting the working chamber together with the iron core and the polymer resin adhesive into a high-speed centrifugal swinging cylinder of a supergravity machine, setting the supergravity acceleration to be 800-3000 g, and then rotating at a high speed for 3-10 min;
s4, taking out the working chamber, pouring out the residual polymer resin glue, and taking out the iron core;
and S5, placing the iron core on a flat workbench, and placing for 24-48h at room temperature to obtain the required iron core.
Preferably, in step S2, the polymer resin adhesive is epoxy resin.
Still preferably, in step S2, the polymer resin glue immerses the iron core by 2cm to 3 cm.
More preferably, in the step S3, the high-gravity machine is a high-speed centrifuge with a large cylinder.
The invention has the advantages that: (1) the supergravity impregnation is adopted to replace vacuum impregnation, so that the thin strip gap of the iron-based amorphous/nanocrystalline alloy iron core can be better filled with the high-molecular resin adhesive, and the resin filling rate is more than 99%; (2) the iron core has the performance of easier cutting, and chips cannot fall out in the process of abrasive wheel cutting or linear cutting; (3) the high-speed centrifuge with the large charging barrel is adopted as the hypergravity machine in the iron core manufacturing process, the equipment is simple, the manufacture is easy, the evacuation is not needed in the dipping process, and the efficiency is high.
Drawings
Fig. 1 is an enlarged view of a cut surface of a core.
The meaning of the reference symbols in the figures: 1. an iron-based amorphous thin strip, 2, a high polymer resin adhesive.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
A manufacturing process of a high-filling easy-cutting iron-based amorphous nanocrystalline alloy iron core is characterized by comprising the following steps:
s1, obtaining a circular iron core (the iron core is an iron-based amorphous iron core or a nanocrystalline iron core) through conventional processes such as smelting, spraying an amorphous thin strip, winding, vacuum annealing and the like;
s2, the iron core in the S1 is placed into a working chamber, and the working chamber is a cylindrical container which is slightly larger than the iron core in size. Adding a high-molecular resin adhesive, wherein the high-molecular resin adhesive is epoxy resin and is immersed in the iron core, and the high-molecular resin adhesive is immersed in the iron core by 2-3 cm;
s3, placing the working chamber together with the iron core and the polymer resin adhesive into a high-speed centrifugal throwing cylinder of a high-gravity machine, wherein the high-gravity machine is a high-speed centrifugal machine with a large material cylinder, the high-gravity acceleration is set to be 800-3000 g, and then, rotating at a high speed for 3-10 min;
s4, taking out the working chamber, pouring out the residual polymer resin glue, and taking out the iron core;
and S5, placing the iron core on a flat workbench, and placing for 24-48h at room temperature to obtain the required iron core.
The filling rate can be calculated using the following formula.
Figure RE-GDA0002385407880000041
Wherein m is1，m3As actual measurement values of core mass before and after curing, m2From m1，ρIron，ρGlueAnd VGeneral assemblyAnd (4) calculating.
Before curing: vGeneral assembly＝VIron+VGapActual mass m1＝ρIron×VIron
After curing:mass m at 100% fill2＝ρIron×VIron+ρGlue×VGap
Mass m at a filling rate of f3＝ρIron×VIron+ρGlue×VGap×f
Specific example (a): the annular iron core is obtained by the conventional processes of smelting, spraying amorphous thin strips, winding, vacuum annealing and the like, and has the size of 47/77/28 (the inner diameter is 47mm, the outer diameter is 77mm, the height is 28mm) and the mass m1459.196 g;
s2, the iron core in the S1 is placed into a working chamber, and the working chamber is a cylindrical container which is slightly larger than the iron core in size. And adding a polymer resin adhesive, wherein the polymer resin adhesive is epoxy resin and immerses the iron core by 2 cm.
S3, placing the working chamber, the iron core and the epoxy resin into a high-speed centrifugal throwing cylinder of a supergravity machine, wherein the supergravity machine is a high-speed centrifugal machine with a large material cylinder, the supergravity acceleration is set to be 1000 g, and then the supergravity machine rotates at a high speed for 5 min;
s4, taking out the working chamber, pouring out the residual polymer resin glue, and taking out the iron core;
s5, placing the iron core on a flat workbench, placing the iron core at room temperature for 24 hours to obtain the required iron core, and measuring the mass m3480.625 grams.
The density of the iron-based amorphous/nanocrystalline alloy is found to be 7.20g/cm3The density of the epoxy resin was 1.20g/cm3The mass at 100% fill is calculated to be
Figure RE-GDA0002385407880000051
Figure RE-GDA0002385407880000052
Specific example (b): the annular iron core is obtained by the conventional processes of smelting, spraying amorphous thin strip, winding, vacuum annealing and the like, and the annular iron core is obtainedThe dimension is 47/77/28 (inner diameter 47mm, outer diameter 77mm, height 28mm), mass m1459.192 g;
s2, the iron core in the S1 is placed into a working chamber, and the working chamber is a cylindrical container which is slightly larger than the iron core in size. And adding a polymer resin adhesive, wherein the polymer resin adhesive is epoxy resin and immerses the iron core, and the polymer resin adhesive immerses the iron core by 3 cm.
S3, placing the working chamber, the iron core and the epoxy resin into a high-speed centrifugal throwing cylinder of a supergravity machine, wherein the supergravity machine is a high-speed centrifugal machine with a large material cylinder, the supergravity acceleration is set to be 1900 g, and then the supergravity machine rotates at a high speed for 8 min;
s4, taking out the working chamber, pouring out the residual polymer resin glue, and taking out the iron core;
s5, placing the iron core on a flat workbench, placing the iron core at room temperature for 30 hours to obtain the required iron core, and measuring the mass m3480.665 grams.
The density of the iron-based amorphous/nanocrystalline alloy is found to be 7.20g/cm3The density of the epoxy resin was 1.20g/cm3The mass at 100% fill is calculated to be
Figure RE-GDA0002385407880000061
Figure RE-GDA0002385407880000062
Specific example (iii): the annular iron core is obtained by the conventional processes of smelting, spraying amorphous thin strips, winding, vacuum annealing and the like, and has the size of 47/77/28 (the inner diameter is 47mm, the outer diameter is 77mm, the height is 28mm) and the mass m1459.198 g;
s2, the iron core in the S1 is placed into a working chamber, and the working chamber is a cylindrical container which is slightly larger than the iron core in size. And adding a polymer resin adhesive, wherein the polymer resin adhesive is epoxy resin and immerses the iron core, and the polymer resin adhesive immerses the iron core by 2.5 cm.
S3, placing the working chamber, the iron core and the epoxy resin into a high-speed centrifugal throwing cylinder of a supergravity machine, wherein the supergravity machine is a high-speed centrifugal machine with a large material cylinder, the supergravity acceleration is set to be 3000 g, and then rotating for 10min at a high speed;
s4, taking out the working chamber, pouring out the residual polymer resin glue, and taking out the iron core;
s5, placing the iron core on a flat workbench, placing the iron core at room temperature for 48 hours to obtain the required iron core, and measuring the mass m3480.692 grams.
The density of the iron-based amorphous/nanocrystalline alloy is found to be 7.20g/cm3The density of the epoxy resin was 1.20g/cm3The mass at 100% fill is calculated to be
Figure RE-GDA0002385407880000071
Figure RE-GDA0002385407880000072
As shown in fig. 1, the cutting surface of the iron core presents an obvious lamellar structure after being enlarged, the white layer is an iron-based amorphous/nanocrystalline alloy thin strip, the black layer is filled with high polymer resin glue, and the iron-based amorphous/nanocrystalline alloy thin strip on the cutting surface is completely free from fracture.
The invention has the advantages that: (1) the supergravity impregnation is adopted to replace vacuum impregnation, so that the thin strip gap of the iron-based amorphous/nanocrystalline alloy iron core can be better filled with the high-molecular resin adhesive, and the resin filling rate is more than 99%; (2) the iron core has the performance of easier cutting, and chips cannot fall out in the process of abrasive wheel cutting or linear cutting; (3) the high-speed centrifuge with the large charging barrel is adopted as the hypergravity machine in the iron core manufacturing process, the equipment is simple, the manufacture is easy, the evacuation is not needed in the dipping process, and the efficiency is high.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims (3)

1. A manufacturing process of a high-filling easy-cutting iron-based amorphous nanocrystalline alloy iron core is characterized by comprising the following steps:
s1, obtaining a circular iron core through conventional processes of smelting, spraying amorphous thin strips, winding and vacuum annealing;
s2, placing the iron core in the S1 into a working chamber, wherein the working chamber is a cylindrical container, the size of the working chamber is slightly larger than that of the iron core, and the iron core is immersed by adding the polymer resin adhesive; the polymer resin adhesive is epoxy resin;
s3, putting the working chamber together with the iron core and the polymer resin adhesive into a high-speed centrifugal swinging cylinder of a supergravity machine, setting the supergravity acceleration to be 800-3000 g, and then rotating at a high speed for 3-10 min;
s4, taking out the working chamber, pouring out the residual polymer resin glue, and taking out the iron core;
and S5, placing the iron core on a flat workbench, and placing for 24-48h at room temperature to obtain the required iron core.
2. The process for manufacturing the iron-based amorphous nanocrystalline alloy iron core with high filling and easy cutting according to claim 1, wherein in the step S2, the iron core is immersed by the polymer resin glue for 2-3 cm.
3. The process of claim 1, wherein in step S3, the high gravity machine is a high speed centrifuge with large cylinder.
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