KR102428568B1 - Laminatied rare earth pernanent magnet manufacturing method for improvement electric vehicle motor - Google Patents

Abstract

It relates to a method for manufacturing a multilayer split rare-earth magnet for improving the performance of an electric vehicle driving motor,
A material sintering step of dividing and sintering the magnet material formed from the raw material of the rare earth alloy powder into a plurality of pieces; A bonding lamination step of bonding and laminating the magnet material divided and molded into a plurality of sintered materials; A polishing step of rounding the corners of the bonded and laminated magnet material; A plating step of forming a plating layer for corrosion prevention on the surface of the magnet material; and, in the material sintering step, the magnet material is dividedly molded in the form of a lower member, a plurality of intermediate members, and an upper member, or a pair of finishing members, Through the technical composition of split molding in the form of a number of intermediate members and connecting members
In the bonding lamination step, it is possible to precisely laminate and assemble the magnet material divided into multiple pieces, and it is possible to prevent leakage of the insulating adhesive to the outer surface of the laminated magnet material. can make a big contribution.

Description

Manufacturing method of laminated split rare-earth magnet for improving the performance of electric vehicle driving motor

The present invention relates to a method of manufacturing a multilayer split rare earth magnet for improving the performance of a motor for driving an electric vehicle, and more particularly, to reduce eddy current loss, a magnet material formed from a raw material of a rare earth alloy powder is divided into a plurality of pieces and sintered It relates to bonding and laminating the magnet material after doing so, grinding the corners, and forming a plating layer for corrosion prevention on the surface.

In general, motors used in green cars such as hybrid vehicles, electric vehicles and plug-in hybrids require high speed and high output, so a rare earth magnet (Nd series) synchronous motor (PMSM) is used, and consists of a rotor, a stator, a housing and a shaft. .

In addition, a motor using a high-energy rare-earth magnet is widely applied to a drive system that is essential for miniaturization and weight reduction in all industries including green cars.

Since rare earth magnets have high conductivity, eddy currents are generated during motor driving. These eddy currents appear as heat loss, and there is a problem in that the performance of the magnet and motor efficiency are reduced due to heat generation.

In addition, for miniaturization, the speed of the motor is continuously increasing, and accordingly, the eddy current loss is also increased.

In particular, since the heat of the rotor is structurally difficult to cool, and the temperature rise of the magnet causes deterioration of the performance of the magnet, an alternative to reduce the eddy current of the magnet is needed.

Recently, as an eddy current reduction measure for electric vehicle driving motors, the optimal design of the motor shape for eddy current reduction and the division and assembly of magnets are performed.

However, if the rotor is manufactured by dividing the magnet, the process becomes complicated and causes an increase in the manufacturing cost. This includes an insulating layer, but is formed as a single block, so that the motor is easily manufactured and the eddy current is reduced. Split-type rare earth magnet design and manufacturing technology is required.

The following Patent Document 1 discloses a method for manufacturing a split-stack type permanent magnet capable of suppressing eddy current generation.

The manufacturing method of the divided laminated permanent magnet of Patent Document 1 includes a first step of dividing the permanent magnet base material; a second step of treating the entire surface of the divided magnet piece with an insulating coating; a third step of bonding the insulating film-treated magnet pieces; a fourth step of processing the joined body to have a predetermined dimension; and a fifth step of applying an insulating coating treatment to the entire surface of the joined body after processing.

The following Patent Document 2 discloses an apparatus for manufacturing a permanent magnet disposed in a rotating electric machine in which a plurality of magnet pieces formed by breaking and dividing along a notch groove are aligned with each other by interposing an adhesive between the fracture surfaces, and manufacturing the same A method is disclosed.

The following Patent Document 3 discloses a method of manufacturing a permanent magnet in which two or more divided permanent magnets are assembled and manufactured.

The method for manufacturing a split-layer rare earth magnet according to the prior art is manufactured by bonding and laminating a sintered magnet material in a rectangular shape, then polishing the surface and plating it.

Japanese Patent Laid-Open No. 2003-134750 (published on May 09, 2003) Republic of Korea Patent Publication No. 10-2013-0020915 (published on March 04, 2013) Republic of Korea Patent Publication No. 10-2012-0116849 (published on October 23, 2012)

However, in the method of manufacturing a split-layer rare earth magnet according to the prior art, it is difficult to precisely laminate the magnet material in the bonding and lamination process, and the insulating adhesive applied to the adhesive surface of the magnet material in the process of pressurizing the magnet material with a lamination jig. In the polishing process performed after the bonding and lamination process, the surface of the magnet material was cut and polished to remove the leaked insulating adhesive, and at the same time, the flatness and dimensions had to be corrected.

Therefore, the manufacturing method of the split-layer type rare earth magnet according to the prior art has a problem in that the productivity of the split-layer type rare earth magnet is not good because it requires a lot of work, manpower and time.

The present invention is to solve the problem of the surface brushing apparatus for wooden flooring according to the prior art, and its purpose is to reduce the number of manufacturing processes by efficiently bonding and laminating magnet materials that have been divided and molded into multiple pieces and sintered. The object of the present invention is to provide a method for manufacturing a split-layer rare-earth magnet for improving the performance of a motor for driving an electric vehicle, which can be reduced to improve productivity and reduce costs.

In order to achieve the above object, the method for manufacturing a multilayer split rare earth magnet for improving the performance of a motor for driving an electric vehicle according to the present invention comprises dividing a magnet material formed from a raw material of a rare earth alloy powder into a plurality of pieces and sintering it. material sintering step; A bonding lamination step of bonding and laminating the magnet material divided and molded into a plurality of sintered materials; A polishing step of rounding the corners of the bonded and laminated magnet material; A plating step of forming a plating layer to prevent corrosion on the surface of the magnet material; and, in the material sintering step, the magnet material is dividedly molded in the form of a lower member, a plurality of intermediate members, and an upper member, or a pair of finishing members, It is characterized in that it is divided and molded in the form of a plurality of intermediate members and connecting members.

In the method for manufacturing a split-layer rare earth magnet for improving the performance of a motor for driving an electric vehicle according to the present invention, the magnet material is divided into a lower member, a plurality of intermediate members, and an upper member in the material sintering step, wherein the lower member is the upper center It is molded in a form in which a fitting protrusion is provided, and a plurality of intermediate members are formed in a form in which a fitting groove into which the fitting protrusion of the lower member is inserted and coupled is provided at the center of the lower end and a fitting protrusion is provided at the center of the upper end, and the upper member is at the bottom It is characterized in that it is molded in a form in which a fitting groove into which the fitting protrusion of the upper intermediate member is inserted and coupled is provided in the center.

In the method for manufacturing a split-layer rare earth magnet for improving the performance of an electric vehicle driving motor according to the present invention, an insulating adhesive is applied only to the outer surface of the fitting protrusion of the lower member and the outer surface of the fitting protrusion of each intermediate member in the bonding application step. characterized in that

In the method for manufacturing a split-layer rare earth magnet for improving the performance of a motor for driving an electric vehicle according to the present invention, in the material sintering step, the magnet material is divided and molded into a pair of finishing members, a plurality of intermediate members, and connecting members, at this time the finishing member is molded in a form in which fitting grooves into which the upper end and lower end of the connecting member are inserted and coupled are provided at the center of the upper end and the lower end, and a plurality of intermediate members are molded in a form in which a fitting hole through which the connecting member is penetrated is provided in the center, and the connecting member is It is characterized in that it is molded in the form of a rod.

The method for manufacturing a split-layer rare earth magnet for improving the performance of a motor for driving an electric vehicle according to the present invention is characterized in that an insulating adhesive is applied only to the outer surface of the rod-shaped connecting member in the bonding lamination step.

According to the method for manufacturing a split-layer rare earth magnet for improving the performance of a motor for driving an electric vehicle according to the present invention, it is possible to precisely laminate and assemble a plurality of split-molded magnet materials in the bonding lamination step, and the outside of the laminated magnet material Since it is possible to prevent the insulating adhesive from leaking to the surface, it is possible to reduce the number of manufacturing man-hours, such as removing the leaked insulating adhesive by grinding the outer surface of the magnet material after the main lamination step, or eliminating the need to correct the dimensions. , it is possible to reduce the manpower and time required for it, and it can greatly contribute to the productivity improvement and cost reduction of the multilayer split type rare earth magnet.

1 is a process flow diagram of a method for manufacturing a split-layer type rare-earth magnet for improving the performance of a motor for driving an electric vehicle according to the present invention;
2 is a front view and a plan view of a first embodiment of a magnet material of a method for manufacturing a laminated split type rare-earth magnet for improving the performance of a motor for driving an electric vehicle;
3 is a front view and a plan view of a second embodiment of a magnet material of a method for manufacturing a laminated split-type rare-earth magnet for improving the performance of a motor for driving an electric vehicle;
4 is an exploded bonding cross-sectional view and a combined cross-sectional view of a first embodiment of a magnet material of a method for manufacturing a laminated split-type rare earth magnet for improving the performance of a motor for driving an electric vehicle;
5 is an exploded bonding cross-sectional view and a combined cross-sectional view of a second embodiment of a magnet material of a method for manufacturing a split-layer type rare earth magnet for improving the performance of a motor for driving an electric vehicle;

Hereinafter, a method for manufacturing a split-layer type rare-earth magnet for improving the performance of a motor for driving an electric vehicle according to the present invention will be described in detail with reference to the accompanying drawings. For reference, sizes of components, thicknesses of lines, etc. shown in the drawings referenced to describe the present invention may be expressed somewhat exaggeratedly for convenience of understanding.

In addition, the terms used in the description of the present invention are defined in consideration of functions in the present invention, and thus may vary according to user, operator intention, custom, and the like. Therefore, the definition of this term should be made based on the content throughout the present specification.

And in the present application, terms such as 'comprise' and 'have' refer to the existence of specific numbers, steps, operations, components, parts, or combinations thereof described in the specification, but one or more other It is to be understood that this does not preclude the possibility of addition or presence of features or numbers, steps, operations, components, parts, or combinations thereof.

In addition, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only this embodiment makes the disclosure of the present invention complete, and the scope of the invention to those of ordinary skill in the art It is provided for complete disclosure.

Therefore, the present invention can be made various changes and can have various forms, implementation examples (態樣, aspects) (or embodiments) will be described in detail in the specification. However, this is not intended to limit the present invention to a specific disclosed form, and it should be understood to include all changes, equivalents or substitutes included in the technical spirit of the present invention, and the expression in the singular used herein is clearly different from the context. Unless otherwise indicated, plural expressions are included.

However, in describing the present invention, detailed descriptions of well-known or well-known functions or configurations will be omitted in order to clarify the gist of the present invention.

Hereinafter, "upper", "downward", "front" and "rear" and other directional terms are defined based on the state shown in the drawings.

1 is a process flowchart of a method for manufacturing a split-layer type rare-earth magnet for improving the performance of a motor for driving an electric vehicle according to the present invention.

According to the present invention, a method for manufacturing a split-layer rare earth magnet for improving the performance of a motor for driving an electric vehicle includes a material sintering step, a bonding lamination step, a polishing step, and a plating step.

The material sintering step is a step of dividing and sintering the magnet material 100 formed from the raw material of the rare earth alloy powder into a plurality of pieces.

2 is a front view and a plan view of a first embodiment of a magnet material of a method for manufacturing a split-stack rare earth magnet for improving the performance of a motor for driving an electric vehicle, and FIG. 3 is a split-laminated type for improving the performance of a motor for driving an electric vehicle. It is a front view and a top view of 2nd Embodiment of the magnet material of the manufacturing method of a rare-earth magnet.

In the material sintering step, the magnet material 100 is dividedly molded into the first embodiment of the lower member 110 , a plurality of intermediate members 120 , and the upper member 130 , or a pair of finishing members 140 , a plurality of intermediate members The member 150 and the connecting member 160 may be dividedly molded into the second embodiment.

When the magnet material 100 is dividedly molded into the first embodiment of the lower member 110, a plurality of intermediate members 120, and the upper member 130, the lower member 110 is a fitting protrusion 111 in the center of the upper end. is formed in the form provided, and a plurality of intermediate members 120 are provided with a fitting groove 121 into which the fitting protrusion 111 of the lower member 110 is inserted and coupled at the center of the lower end, and at the same time, a fitting protrusion 122 at the center of the upper end. The upper member 130 is formed in a form in which a fitting groove 131 into which the fitting protrusion 122 of the upper intermediate member 120 is inserted and coupled is provided at the center of the lower end.

In the first embodiment, the fitting protrusion 111 of the lower member 110, the fitting groove 121 and the fitting protrusion 122 of the intermediate member 120, and the fitting groove 131 of the upper member 130 are precisely laminated. It is molded in a rectangular planar shape to achieve

In addition, when the magnet material 100 is dividedly molded into the second embodiment of the pair of closing members 140 , the plurality of intermediate members 150 , and the connecting members 160 , the closing member 140 is the upper center or It is molded in a form in which a fitting groove 141 into which the upper end or the lower end of the connecting member 160 is inserted and coupled is provided at the center of the lower end, and the plurality of intermediate members 150 have fitting holes 151 through which the connecting member 160 is penetrated in the center. ) is formed in the provided form, and the connecting member 160 is formed in the form of a rod.

In the second embodiment, the fitting groove 141 of the closing member 140, the fitting hole 151 of the intermediate member 150, and the rod-shaped connecting member 160 are formed in the first embodiment to achieve precise lamination. It is molded into a rectangular planar shape like , but may be molded into other planar shapes.

The bonding lamination step is a step of bonding and laminating the magnet material 100 divided and molded into a plurality of pieces and sintered.

4 is a bonding and decomposed cross-sectional view and a coupling cross-sectional view of a first embodiment of a magnet material of a method for manufacturing a laminated split-type rare earth magnet for improving the performance of a motor for driving an electric vehicle, and FIG. It is a bonding lamination|stacking decomposition cross-sectional view and a bonding cross-sectional view of a second embodiment of a magnet material of a method for manufacturing a split-laminated rare earth magnet.

In the case of the first embodiment of the magnet material in the bonding lamination step, the insulating adhesive is applied only to the fitting projection 111 portion of the lower member 110 and the fitting projection 122 portion of each intermediate member 120, and then the lower member ( A plurality of intermediate members 120 are sequentially stacked and coupled to 110), and the upper member 120 is laminated to the upper intermediate member 120, and then the lower end of the lower member 110 and the upper member 130 are laminated with a lamination jig. The upper end is press-bonded in the direction of the intermediate member 120 .

In the case of the second embodiment of the magnet material in the bonding lamination step, an insulating adhesive is applied only to the outer surface of the connection member 160 and the connection member 160 is inserted and coupled into the fitting groove 141 of the lower finishing member 140 . Each intermediate member 150 is put into the connecting member 160 to stack and combine a plurality of intermediate members 150 on top of the lower finishing member 140 in sequence, and the connection protruding from the upper end of the upper intermediate member 150 After inserting and coupling the upper finishing member 140 to the member 160 to laminate and combine the upper finishing member 140 to the upper intermediate member 150, the lower end and the upper finishing member 140 of the lower finishing member 140 with a lamination jig ) and press-adhesive to the upper end of the intermediate member 150 in the direction.

In the method for manufacturing a split-layer rare earth magnet for improving the performance of a motor for driving an electric vehicle according to the present invention, an insulating adhesive is applied only to the fitting protrusions 111 and 122 or the connecting member 160 of the split-molded magnet material 100 . Therefore, while it is possible to secure a sufficient adhesive area in the bonding lamination step, the surplus insulating adhesive does not leak to the outer surface of the magnet material 100 when bonding and adhering the laminated magnet material 100 by pressing with a lamination jig. won't

The polishing step is a step of rounding the corners of the magnet material 100 bonded and stacked in the bonding lamination step.

In the polishing step, a method of barrel finishing in which the bonded and laminated magnet material 100 is put into a barrel filled with a bead-shaped abrasive member and rotated to polish the edge of the magnet material 100 can be used.

The plating step is a step of forming a plating layer for corrosion prevention on the surface of the magnet material 100 after the polishing step.

The metal plated on the surface of the magnet material 100 in the plating step is nickel, titanium, aluminum, and other metals with excellent corrosion resistance.

According to the present invention, a method for manufacturing a split-layer rare earth magnet for improving the performance of a motor for driving an electric vehicle is a method for manufacturing a magnet material 100 in a material sintering step, including a lower member 110, a plurality of intermediate members 120, and an upper member 130. ), or divided into a pair of finishing members 140 , a plurality of intermediate members 150 , and connecting members 160 .

And, in the bonding lamination step, the magnet material 100 divided into a plurality of pieces through fitting protrusions 111, 122, fitting grooves 121, 131, 141, and fitting holes 151 can be precisely laminated and assembled. there will be

And by applying the insulating adhesive only to the fitting protrusions 111 and 122 or the connecting member 160 in the bonding lamination step, it is possible to prevent the insulating adhesive from leaking to the outer surface of the magnet material 100 during the lamination process.

Therefore, according to the method for manufacturing a split-layer rare-earth magnet for improving the performance of a motor for driving an electric vehicle according to the present invention, the outer surface of the magnet material 100 is polished after the main lamination step to remove the leaked insulating adhesive or correct the dimensions. It is possible to reduce the number of manufacturing man-hours, such as eliminating the need for a manufacturing process, and to reduce the required manpower and time, thereby improving the productivity and reducing the cost of the multilayer split rare-earth magnet.

The invention made by the present inventors has been described in detail according to the above embodiments, but the present invention is not limited to the above embodiments and various modifications can be made without departing from the gist of the present invention.

100: magnet material
110: lower member
111, 122: fitting projection
120, 150: intermediate member
121, 131, 141: fitting groove
130: upper member
140: finishing member
151: fitting hole
160: connection member

Claims (5)

delete delete delete a material sintering step of dividing and sintering the magnet material 100 formed from the raw material of the rare earth alloy powder into a plurality of pieces;
A bonding lamination step of bonding and laminating the magnet material 100 divided and molded into a plurality of sintered;
A polishing step of rounding the corners of the bonded and laminated magnet material 100;
Including; a plating step of forming a plating layer for corrosion prevention on the surface of the magnet material 100;
In the material sintering step, the magnet material 100 is divided and formed into a pair of finishing members 140 , a plurality of intermediate members 150 , and a connection member 160 ,
The closing member 140 is molded in a form in which a fitting groove 141 into which the upper end and the lower end of the connecting member 160 are inserted and coupled is provided at the center of the upper end and the center of the lower end,
A plurality of intermediate members 150 are molded in a form in which a fitting hole 151 through which the connection member 160 passes is provided in the center,
A method of manufacturing a split-layer rare-earth magnet for improving the performance of an electric vehicle driving motor, characterized in that the connecting member 150 is formed in a rod shape. 5. The method of claim 4,
A method for manufacturing a split-layer rare-earth magnet for improving the performance of a motor for driving an electric vehicle, characterized in that the insulating adhesive is applied only to the outer surface of the rod-shaped connecting member 160 in the bonding lamination step.

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