WO2013176096A1 - Laminated body and method for manufacturing same - Google Patents

Laminated body and method for manufacturing same Download PDF

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Publication number
WO2013176096A1
WO2013176096A1 PCT/JP2013/063990 JP2013063990W WO2013176096A1 WO 2013176096 A1 WO2013176096 A1 WO 2013176096A1 JP 2013063990 W JP2013063990 W JP 2013063990W WO 2013176096 A1 WO2013176096 A1 WO 2013176096A1
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Prior art keywords
magnet
laminated
magnet member
laminate
laminated body
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PCT/JP2013/063990
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French (fr)
Japanese (ja)
Inventor
雄一郎 山内
真也 宮地
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日本発條株式会社
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Publication of WO2013176096A1 publication Critical patent/WO2013176096A1/en

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles
    • 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
    • H01F41/0253—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 for manufacturing permanent magnets
    • H01F41/026—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 for manufacturing permanent magnets protecting methods against environmental influences, e.g. oxygen, by surface treatment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0205—Magnetic circuits with PM in general
    • H01F7/021—Construction of PM
    • 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
    • H01F41/0253—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 for manufacturing permanent magnets

Definitions

  • the present invention relates to a laminate including a magnet used for a motor disposed in, for example, a device in an automobile or the like, a household appliance, and the like, and a method for manufacturing the laminate.
  • a magnet member having a magnet is used for a motor disposed in a device in an automobile or the like, a device for home appliances, or the like.
  • the motor include those used in various devices such as an IPM (Interior Permanent Magnet) motor, a motor for precision equipment such as a hard disk drive, and a vibration motor for a mobile phone.
  • the magnet member is also used for small speakers and the like.
  • a rare earth magnet such as a neodymium magnet having a strong magnetism or a samarium cobalt magnet having excellent heat resistance is used.
  • the magnetism of the magnet may be lost during joining.
  • neodymium magnets and samarium cobalt magnets have inherent Curie temperatures, which are transition temperatures at which a ferromagnetic material transitions to a paramagnetic material, and are 310 ° C. and 830 ° C., respectively.
  • Curie temperatures are transition temperatures at which a ferromagnetic material transitions to a paramagnetic material, and are 310 ° C. and 830 ° C., respectively.
  • This demagnetization may change the performance of the magnet.
  • a samarium cobalt magnet since re-magnetization after demagnetization is impossible, once demagnetized, there is a possibility that it cannot be used as a laminate.
  • the magnet and the metal have different thermal expansion coefficients, and the magnet and the mounting member may be separated due to a difference in thermal expansion occurring before and after joining.
  • the magnet since the magnet has thermal expansion anisotropy, it is not suitable for high-temperature bonding.
  • This invention is made in view of the above, Comprising: It aims at providing the manufacturing method of a laminated body and a laminated body which can join a magnet member and an attachment member, without changing magnetism. .
  • a laminate according to the present invention includes a magnet member having a magnet, and a magnetic material that is laminated on the magnet member and accelerates powder containing a metal material together with a gas. And a laminated member made of a metal film formed by spraying and depositing in a solid state on the surface of the member.
  • the laminate according to the present invention is characterized in that, in the above invention, the magnet member has a plating layer covering the surface of the magnet.
  • the laminate according to the present invention is characterized in that, in the above invention, the magnet is a rare earth magnet.
  • the laminate according to the present invention is characterized in that, in the above-mentioned invention, the metal material is either copper or aluminum.
  • the manufacturing method of the laminated body concerning this invention is a manufacturing method of the laminated body which consists of a magnet member, and the metal membrane
  • the metal film is formed by accelerating a powder containing a metal material made of aluminum together with a gas and spraying and depositing the powder in a solid state on the surface.
  • a laminated member made of a metal film formed by accelerating a powder containing a metal material together with a gas and spraying and depositing the powder on the surface of the magnet member in a solid phase state is provided as a magnet. Since the members are laminated and joined, the magnet member and the attachment member can be joined without changing the magnetism.
  • FIG. 1 is a perspective view schematically showing a configuration of a laminate according to an embodiment of the present invention.
  • 2 is a cross-sectional view taken along line AA in FIG.
  • Drawing 3 is a mimetic diagram showing the outline of the cold spray device used for manufacture of the layered product concerning an embodiment of the invention.
  • FIG. 1 is a perspective view schematically showing the configuration of the laminate according to the present embodiment.
  • 2 is a cross-sectional view taken along line AA in FIG.
  • a laminated body 1 shown in FIGS. 1 and 2 includes a plate-like magnet member 10 having at least a magnet 10 a which is a rare earth magnet such as a neodymium magnet or a samarium cobalt magnet, and a laminated member laminated on one main surface of the magnet member 10. 11.
  • the laminated body 1 is used for the motor arrange
  • the magnet member 10 includes a magnet 10a and a plating layer 10b in which the surface of the magnet 10a is plated.
  • the plating layer 10b is made of copper plating.
  • the plating layer 10b functions as an antioxidant for the magnet 10a.
  • the magnet 10a is a plate-like permanent magnet, and is, for example, a rare earth magnet such as a neodymium magnet having strong magnetism or a samarium cobalt magnet having excellent heat resistance.
  • Neodymium magnets and samarium cobalt magnets have the inherent Curie temperature and thermal expansion anisotropy (see Table 1) as described above.
  • neodymium magnets generate a very strong magnetic field, but are easily broken mechanically, and the temperature change of the magnetic force is large.
  • Samarium cobalt magnets have excellent heat resistance and can be used up to about 350 ° C., while the strength of the magnetic field is smaller than that of neodymium magnets of the same shape.
  • the magnet 10a can be selected according to the use to be used.
  • the laminated member 11 is formed using, for example, copper (including a copper alloy) or aluminum (including an aluminum alloy).
  • the laminated member 11 is attached to a predetermined position of the motor.
  • the laminated member 11 is a metal film formed by a cold spray method described later.
  • the metal film film material
  • any metal or alloy having conductivity in addition to the above-described copper and aluminum can be applied.
  • FIG. 3 is a schematic diagram showing an outline of a cold spray apparatus used for forming a metal film.
  • the metal film formation by the cold spray method is performed by, for example, a cold spray apparatus 20 shown in FIG.
  • the cold spray device 20 contains a gas heater 21 that heats a compressed gas, a powder supply device 22 that contains powder (powder, such as copper or aluminum) that is sprayed on the sprayed object, and supplies the powder to the spray gun 24.
  • a gas nozzle 23 for injecting material powder mixed with the compressed gas heated by the spray gun 24 toward the surface of the magnet member 10 is provided.
  • the compressed gas helium, nitrogen, air or the like is used.
  • the supplied compressed gas is supplied to the gas heater 21 and the powder supply device 22 by valves 25 and 26, respectively.
  • the compressed gas supplied to the gas heater 21 is heated to, for example, 50 to 900 ° C. and then supplied to the spray gun 24. More preferably, the compressed gas is heated so that the upper limit temperature of the powder sprayed onto the surface of the magnet member 10 is kept below the melting point of the coating material. By keeping the heating temperature of the powder below the melting point of the coating material, the oxidation of the coating material can be suppressed.
  • the compressed gas supplied to the powder supply device 22 is supplied to the spray gun 24 so that, for example, material powder having a particle size of about 10 to 100 ⁇ m in the powder supply device 22 has a predetermined discharge amount.
  • the heated compressed gas is accelerated to a supersonic speed (about 340 m / s or more) by a gas nozzle 23 having a tapered wide shape.
  • the powder supplied to the spray gun 24 is accelerated by the injection of the compressed gas into the supersonic flow, and collides with the surface of the magnet member 10 at a high speed in the solid state to form a film.
  • the laminated body 1 in which the laminated member 11 is bonded to the magnet member 10 can be formed by covering the surface of the magnet member 10 with a metal film by the above-described treatment. In addition, you may adjust the surface shape by performing surface processing processes, such as cutting, after film formation.
  • the attachment member (laminated member 11) joined to the magnet member 10 is made of a metal film formed by the cold spray method.
  • the magnet member and the mounting member can be joined without changing the angle. For this reason, no phase transition occurs in the magnet, and there is no need to perform re-magnetization after the laminate is manufactured. Therefore, this process can be reduced and the manufacturing cost can be reduced.
  • a metal having a low melting point for example, aluminum
  • the cold spray method can form a dense metal film as compared with welding, thermal spraying, and the like that are processed at a high temperature, so that the electrical conductivity of the laminated member is improved. . Therefore, a laminate having good electrical conductivity can be produced.
  • the laminated member 11 has been described as covering one surface of the columnar magnet member 10. However, the laminated member 11 may cover a part of the surface of the magnet member 10, or one or more. It may cover an arbitrarily selected surface.
  • the plating layer 10b includes nickel plating
  • the nickel plating has high hardness, and it is difficult to laminate copper or aluminum by the cold spray method with respect to nickel plating, so copper plating or silver plating is applied on the nickel plating. It is preferable that a two-layer structure in which copper plating or silver plating is exposed on the outer surface of the magnet member 10 is preferable.
  • a metal film laminated member is formed on the surface of the magnet 10a without providing the plating layer 10b. It may be.
  • the main surface of the magnet member 10 has been described as a rectangular plate shape, but not limited to this shape, the main surface may be a circle or an ellipse, It may be spherical.
  • a laminate can be produced by forming a metal film on the surface of each shaped magnet member.
  • the laminate and the method for producing the laminate according to the present invention are useful for joining the magnet member and the attachment member without changing the magnetism.

Abstract

Provided are a laminated body and a method for manufacturing the laminated body such that it is possible to bond a magnet member to an attachment member without changing the magnetization. The laminated body includes: a magnet member (10) comprising a magnet; and a laminated member (11) made of a metal coating laminated on the magnet member (10). The metal coating is formed by accelerating and spraying a powdered material containing a metal material in a solid phase state, together with a gas, over a surface of the magnet member (10) so that the powdered material is deposited thereon. Thereby, the magnet member (10) and the laminated member (11) can be bonded without changing the magnetization.

Description

積層体および積層体の製造方法LAMINATE AND METHOD FOR PRODUCING LAMINATE
　本発明は、例えば、自動車等における機器や、家電用機器等に配設されるモータに用いられる磁石を含む積層体および積層体の製造方法に関する。 The present invention relates to a laminate including a magnet used for a motor disposed in, for example, a device in an automobile or the like, a household appliance, and the like, and a method for manufacturing the laminate.
　従来、自動車等における機器や、家電用機器等に配設されるモータには、磁石を有する磁石部材が用いられる。モータとしては、ＩＰＭ（Interior　Permanent　Magnet）モータ、ハードディスクドライブなどの精密機器用モータ、携帯電話の振動用モータなど、様々な機器に用いられているものが挙げられる。なお、磁石部材は、小型スピーカーなどにも用いられている。また、磁石としては、永久磁石であって、強力な磁性を有するネオジム磁石や、耐熱性に優れるサマリウムコバルト磁石などの希土類磁石が用いられている。 Conventionally, a magnet member having a magnet is used for a motor disposed in a device in an automobile or the like, a device for home appliances, or the like. Examples of the motor include those used in various devices such as an IPM (Interior Permanent Magnet) motor, a motor for precision equipment such as a hard disk drive, and a vibration motor for a mobile phone. The magnet member is also used for small speakers and the like. As the magnet, a rare earth magnet such as a neodymium magnet having a strong magnetism or a samarium cobalt magnet having excellent heat resistance is used.
　一般に、希土類磁石に対する穿孔や切欠き形状の加工は難しいため、樹脂や金属からなる取付部材を磁石部材に積層した積層体を形成することによって、機器の所定の位置に取り付けるための取付性を向上させている（例えば、特許文献１を参照）。この技術では、例えば磁石部材と純銅板とを８００℃程度に加熱して、磁石と純銅板との接触部分において液相を生じさせて両者を接合している。 Generally, it is difficult to drill or cut a notch shape for rare earth magnets, so by forming a laminated body in which a mounting member made of resin or metal is laminated on a magnet member, the mounting property for mounting at a predetermined position of the device is improved. (For example, refer to Patent Document 1). In this technique, for example, a magnet member and a pure copper plate are heated to about 800 ° C., and a liquid phase is generated at a contact portion between the magnet and the pure copper plate to join them together.
特開平８－７８２３１号公報JP-A-8-78231
　しかしながら、特許文献１が開示する技術では、接合温度が約８００℃と高温であるため、接合時において磁石の磁性が失われてしまうおそれがあった。例えば、ネオジム磁石、サマリウムコバルト磁石は、強磁性体が常磁性体に相転移する転移温度である固有のキュリー温度を有しており、それぞれ３１０℃、８３０℃である。このキュリー温度を超えて磁石を加熱すると消磁する。この消磁によって磁石の性能が変化する可能性がある。特にサマリウムコバルト磁石の場合、消磁後の再着磁が不可能であるため、いったん消磁すると、積層体として使用できなくなるおそれがある。 However, in the technique disclosed in Patent Document 1, since the joining temperature is as high as about 800 ° C., the magnetism of the magnet may be lost during joining. For example, neodymium magnets and samarium cobalt magnets have inherent Curie temperatures, which are transition temperatures at which a ferromagnetic material transitions to a paramagnetic material, and are 310 ° C. and 830 ° C., respectively. When the magnet is heated above this Curie temperature, it is demagnetized. This demagnetization may change the performance of the magnet. In particular, in the case of a samarium cobalt magnet, since re-magnetization after demagnetization is impossible, once demagnetized, there is a possibility that it cannot be used as a laminate.
　また、表１に示すように、磁石および金属はそれぞれ異なる熱膨張係数を有しており、接合前後に生じる熱膨張差によって磁石と取付部材とが剥離するおそれもある。加えて、磁石は、熱膨張異方性を有しているため、高温の接合には適していない。
Figure JPOXMLDOC01-appb-T000001
 Further, as shown in Table 1, the magnet and the metal have different thermal expansion coefficients, and the magnet and the mounting member may be separated due to a difference in thermal expansion occurring before and after joining. In addition, since the magnet has thermal expansion anisotropy, it is not suitable for high-temperature bonding.
Figure JPOXMLDOC01-appb-T000001
　本発明は、上記に鑑みてなされたものであって、磁性を変化させることなく磁石部材と取付部材とを接合することが可能な積層体および積層体の製造方法を提供することを目的とする。 This invention is made in view of the above, Comprising: It aims at providing the manufacturing method of a laminated body and a laminated body which can join a magnet member and an attachment member, without changing magnetism. .
　上述した課題を解決し、目的を達成するために、本発明にかかる積層体は、磁石を有する磁石部材と、前記磁石部材に積層され、金属材料を含む粉体をガスと共に加速し、前記磁石部材の表面に固相状態のままで吹き付けて堆積させることによって形成される金属皮膜からなる積層部材と、を備えたことを特徴とする。 In order to solve the above-described problems and achieve the object, a laminate according to the present invention includes a magnet member having a magnet, and a magnetic material that is laminated on the magnet member and accelerates powder containing a metal material together with a gas. And a laminated member made of a metal film formed by spraying and depositing in a solid state on the surface of the member.
　また、本発明にかかる積層体は、上記の発明において、前記磁石部材は、前記磁石の表面を覆うメッキ層を有することを特徴とする。 Further, the laminate according to the present invention is characterized in that, in the above invention, the magnet member has a plating layer covering the surface of the magnet.
　また、本発明にかかる積層体は、上記の発明において、前記磁石は、希土類磁石であることを特徴とする。 The laminate according to the present invention is characterized in that, in the above invention, the magnet is a rare earth magnet.
　また、本発明にかかる積層体は、上記の発明において、前記金属材料は、銅またはアルミニウムのうちのいずれかであることを特徴とする。 The laminate according to the present invention is characterized in that, in the above-mentioned invention, the metal material is either copper or aluminum.
　また、本発明にかかる積層体の製造方法は、磁石部材と、該磁石部材に積層する積層部材としての金属皮膜と、からなる積層体の製造方法であって、前記磁石部材の表面に、銅またはアルミニウムからなる金属材料を含む粉体をガスと共に加速し、前記表面に固相状態のままで吹き付けて堆積させることによって前記金属皮膜を形成させることを特徴とする。 Moreover, the manufacturing method of the laminated body concerning this invention is a manufacturing method of the laminated body which consists of a magnet member, and the metal membrane | film | coat as a laminated member laminated | stacked on this magnet member, Comprising: Alternatively, the metal film is formed by accelerating a powder containing a metal material made of aluminum together with a gas and spraying and depositing the powder in a solid state on the surface.
　本発明によれば、金属材料を含む粉体をガスと共に加速し、磁石部材の表面に固相状態のままで吹き付けて堆積させることによって形成される金属皮膜からなる積層部材（取付部材）を磁石部材に積層して接合するようにしたので、磁性を変化させることなく磁石部材と取付部材とを接合することができるという効果を奏する。 According to the present invention, a laminated member (attachment member) made of a metal film formed by accelerating a powder containing a metal material together with a gas and spraying and depositing the powder on the surface of the magnet member in a solid phase state is provided as a magnet. Since the members are laminated and joined, the magnet member and the attachment member can be joined without changing the magnetism.
図１は、本発明の実施の形態にかかる積層体の構成を模式的に示す斜視図である。FIG. 1 is a perspective view schematically showing a configuration of a laminate according to an embodiment of the present invention. 図２は、図１のＡ－Ａ線断面図である。2 is a cross-sectional view taken along line AA in FIG. 図３は、本発明の実施の形態にかかる積層体の製造に使用されるコールドスプレー装置の概要を示す模式図である。Drawing 3 is a mimetic diagram showing the outline of the cold spray device used for manufacture of the layered product concerning an embodiment of the invention.
　以下、本発明を実施するための形態を図面と共に詳細に説明する。なお、以下の実施の形態により本発明が限定されるものではない。また、以下の説明において参照する各図は、本発明の内容を理解し得る程度に形状、大きさ、および位置関係を概略的に示してあるに過ぎない。すなわち、本発明は各図で例示された形状、大きさ、および位置関係のみに限定されるものではない。 Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by the following embodiment. The drawings referred to in the following description only schematically show the shape, size, and positional relationship so that the contents of the present invention can be understood. That is, the present invention is not limited only to the shape, size, and positional relationship illustrated in each drawing.
　まず、本発明の実施の形態にかかる積層体について、図面を参照して詳細に説明する。図１は、本実施の形態にかかる積層体の構成を模式的に示す斜視図である。図２は、図１のＡ－Ａ線断面図である。図１，２に示す積層体１は、ネオジム磁石、サマリウムコバルト磁石などの希土類磁石である磁石１０ａを少なくとも有する板状の磁石部材１０と、磁石部材１０の一方の主面に積層される積層部材１１と、を備える。積層体１は、例えば、自動車等における機器や、家電用機器等に配設されるモータに用いられる。 First, the laminated body concerning embodiment of this invention is demonstrated in detail with reference to drawings. FIG. 1 is a perspective view schematically showing the configuration of the laminate according to the present embodiment. 2 is a cross-sectional view taken along line AA in FIG. A laminated body 1 shown in FIGS. 1 and 2 includes a plate-like magnet member 10 having at least a magnet 10 a which is a rare earth magnet such as a neodymium magnet or a samarium cobalt magnet, and a laminated member laminated on one main surface of the magnet member 10. 11. The laminated body 1 is used for the motor arrange | positioned at the apparatus in a motor vehicle etc., the apparatus for household appliances, etc., for example.
　磁石部材１０は、図２に示す断面図のように、磁石１０ａと、磁石１０ａの表面にメッキ処理が施されたメッキ層１０ｂと、からなる。本実施の形態では、メッキ層１０ｂが銅メッキからなるものとして説明する。銅メッキからなるメッキ層１０ｂによって磁石１０ａの表面を覆うことによって、メッキ層１０ｂが、磁石１０ａの酸化防止材として機能する。 As shown in the cross-sectional view of FIG. 2, the magnet member 10 includes a magnet 10a and a plating layer 10b in which the surface of the magnet 10a is plated. In the present embodiment, the description will be made assuming that the plating layer 10b is made of copper plating. By covering the surface of the magnet 10a with the plating layer 10b made of copper plating, the plating layer 10b functions as an antioxidant for the magnet 10a.
　磁石１０ａは、板状をなす永久磁石であって、例えば強力な磁性を有するネオジム磁石や、耐熱性に優れるサマリウムコバルト磁石などの希土類磁石である。ネオジム磁石やサマリウムコバルト磁石は、上述したような固有のキュリー温度や、熱膨張異方性（表１参照）を有する。また、ネオジム磁石は、非常に強い磁場を発生する一方、機械的に破壊され易く、磁力の温度変化が大きい。サマリウムコバルト磁石は、耐熱性に優れ、３５０℃程度まで使用可能である一方、磁場の強度は、同一形状のネオジム磁石と比して小さい。磁石１０ａは、使用する用途に応じて選択することができる。 The magnet 10a is a plate-like permanent magnet, and is, for example, a rare earth magnet such as a neodymium magnet having strong magnetism or a samarium cobalt magnet having excellent heat resistance. Neodymium magnets and samarium cobalt magnets have the inherent Curie temperature and thermal expansion anisotropy (see Table 1) as described above. In addition, neodymium magnets generate a very strong magnetic field, but are easily broken mechanically, and the temperature change of the magnetic force is large. Samarium cobalt magnets have excellent heat resistance and can be used up to about 350 ° C., while the strength of the magnetic field is smaller than that of neodymium magnets of the same shape. The magnet 10a can be selected according to the use to be used.
　積層部材１１は、例えば銅（銅合金を含む）やアルミニウム（アルミニウム合金を含む）などを用いて形成される。積層部材１１は、モータの所定の位置に取り付けられる。 The laminated member 11 is formed using, for example, copper (including a copper alloy) or aluminum (including an aluminum alloy). The laminated member 11 is attached to a predetermined position of the motor.
　ここで、積層部材１１は、後述するコールドスプレー法によって形成される金属皮膜である。金属皮膜（皮膜材料）としては、上述した銅やアルミニウムのほか、導電性を有する金属または合金であれば適用可能である。 Here, the laminated member 11 is a metal film formed by a cold spray method described later. As the metal film (film material), any metal or alloy having conductivity in addition to the above-described copper and aluminum can be applied.
　つづいて、積層部材１１（金属皮膜）の形成について、図３を参照して説明する。積層部材１１は、例えばコールドスプレー法によって形成される。図３は、金属皮膜の形成に使用されるコールドスプレー装置の概要を示す模式図である。コールドスプレー法による金属皮膜形成は、例えば図３に示すコールドスプレー装置２０によって行われる。 Subsequently, formation of the laminated member 11 (metal film) will be described with reference to FIG. The laminated member 11 is formed by, for example, a cold spray method. FIG. 3 is a schematic diagram showing an outline of a cold spray apparatus used for forming a metal film. The metal film formation by the cold spray method is performed by, for example, a cold spray apparatus 20 shown in FIG.
　コールドスプレー装置２０は、圧縮ガスを加熱するガス加熱器２１と、被溶射物に溶射する粉末（粉体、例えば銅やアルミニウムなど）を収容し、スプレーガン２４に供給する粉末供給装置２２と、スプレーガン２４で加熱された圧縮ガスと混合された材料粉末を磁石部材１０の表面に向けて噴射するガスノズル２３とを備えている。 The cold spray device 20 contains a gas heater 21 that heats a compressed gas, a powder supply device 22 that contains powder (powder, such as copper or aluminum) that is sprayed on the sprayed object, and supplies the powder to the spray gun 24. A gas nozzle 23 for injecting material powder mixed with the compressed gas heated by the spray gun 24 toward the surface of the magnet member 10 is provided.
　圧縮ガスとしては、ヘリウム、窒素、空気などが使用される。供給された圧縮ガスは、バルブ２５，２６により、ガス加熱器２１と粉末供給装置２２とにそれぞれ供給される。ガス加熱器２１に供給された圧縮ガスは、例えば５０～９００℃に加熱された後、スプレーガン２４に供給される。より好ましくは、磁石部材１０の表面に噴射される粉末の上限温度を皮膜材料の融点以下に留めるように圧縮ガスを加熱する。粉末の加熱温度を皮膜材料の融点以下に留めることにより、皮膜材料の酸化を抑制することができる。 As the compressed gas, helium, nitrogen, air or the like is used. The supplied compressed gas is supplied to the gas heater 21 and the powder supply device 22 by valves 25 and 26, respectively. The compressed gas supplied to the gas heater 21 is heated to, for example, 50 to 900 ° C. and then supplied to the spray gun 24. More preferably, the compressed gas is heated so that the upper limit temperature of the powder sprayed onto the surface of the magnet member 10 is kept below the melting point of the coating material. By keeping the heating temperature of the powder below the melting point of the coating material, the oxidation of the coating material can be suppressed.
　粉末供給装置２２に供給された圧縮ガスは、粉末供給装置２２内の、例えば、粒径が１０～１００μｍ程度の材料粉末が、所定の吐出量となるようにスプレーガン２４に供給される。加熱された圧縮ガスは先細末広形状をなすガスノズル２３により超音速（約３４０ｍ／ｓ以上）に加速される。スプレーガン２４に供給された粉末は、この圧縮ガスの超音速流の中への投入により加速され、固相状態のまま磁石部材１０の表面に高速で衝突して皮膜を形成する。 The compressed gas supplied to the powder supply device 22 is supplied to the spray gun 24 so that, for example, material powder having a particle size of about 10 to 100 μm in the powder supply device 22 has a predetermined discharge amount. The heated compressed gas is accelerated to a supersonic speed (about 340 m / s or more) by a gas nozzle 23 having a tapered wide shape. The powder supplied to the spray gun 24 is accelerated by the injection of the compressed gas into the supersonic flow, and collides with the surface of the magnet member 10 at a high speed in the solid state to form a film.
　上述した処理によって、磁石部材１０の表面を金属皮膜で覆うことで、積層部材１１を磁石部材１０に接合した積層体１を形成することができる。なお、皮膜形成後、切削加工等の表面加工処理を施すことによって、表面の形状を調整してもよい。 The laminated body 1 in which the laminated member 11 is bonded to the magnet member 10 can be formed by covering the surface of the magnet member 10 with a metal film by the above-described treatment. In addition, you may adjust the surface shape by performing surface processing processes, such as cutting, after film formation.
　上述した実施の形態によれば、磁石部材１０に接合される取付部材（積層部材１１）が、コールドスプレー法によって形成された金属皮膜からなるようにしたので、磁石が有するキュリー温度以下において、磁性を変化させることなく磁石部材と取付部材とを接合することができる。このため、磁石に相転移が生じず、積層体製造後に再着磁処理を行う必要がない。したがって、かかる工程を削減することができ、製造コストを低減することが可能となる。 According to the above-described embodiment, the attachment member (laminated member 11) joined to the magnet member 10 is made of a metal film formed by the cold spray method. The magnet member and the mounting member can be joined without changing the angle. For this reason, no phase transition occurs in the magnet, and there is no need to perform re-magnetization after the laminate is manufactured. Therefore, this process can be reduced and the manufacturing cost can be reduced.
　また、上述した実施の形態によれば、コールドスプレー法によって低温で接合処理を行うため、融点の低い金属（例えばアルミニウム）を積層部材として用いることができる。また、銅やアルミニウムを積層部材として用いることによって、導電性に優れた積層体を得ることが可能となる。 Further, according to the above-described embodiment, since the joining process is performed at a low temperature by the cold spray method, a metal having a low melting point (for example, aluminum) can be used as the laminated member. Moreover, it becomes possible to obtain a laminated body excellent in conductivity by using copper or aluminum as a laminated member.
　また、上述した実施の形態によれば、コールドスプレー法では、高温で処理する溶接や溶射法等と比して緻密な金属皮膜を形成させることができるため、積層部材の電気伝導性が向上する。したがって、良好な電気伝導性を有する積層体を作製することができる。 Further, according to the above-described embodiment, the cold spray method can form a dense metal film as compared with welding, thermal spraying, and the like that are processed at a high temperature, so that the electrical conductivity of the laminated member is improved. . Therefore, a laminate having good electrical conductivity can be produced.
　なお、本実施の形態では、積層部材１１が、柱状をなす磁石部材１０の一面を覆うものとして説明したが、磁石部材１０の面の一部を覆うものであってもよいし、１または複数の任意に選択された面を覆うものであってもよい。 In the present embodiment, the laminated member 11 has been described as covering one surface of the columnar magnet member 10. However, the laminated member 11 may cover a part of the surface of the magnet member 10, or one or more. It may cover an arbitrarily selected surface.
　また、メッキ層１０ｂは、ニッケルメッキを含む場合、ニッケルメッキは硬度が高く、ニッケルメッキに対してコールドスプレー法による銅やアルミニウムの積層が困難であるため、ニッケルメッキ上に銅メッキまたは銀メッキを施して、磁石部材１０の外表面に銅メッキまたは銀メッキが露出する２層構造とすることが好ましい。 In addition, when the plating layer 10b includes nickel plating, the nickel plating has high hardness, and it is difficult to laminate copper or aluminum by the cold spray method with respect to nickel plating, so copper plating or silver plating is applied on the nickel plating. It is preferable that a two-layer structure in which copper plating or silver plating is exposed on the outer surface of the magnet member 10 is preferable.
　なお、磁石１０ａの表面に対して、コールドスプレー法による銅やアルミニウムの積層が可能な場合は、メッキ層１０ｂを設けずに、磁石１０ａの表面に対して金属皮膜（積層部材）を形成するものであってもよい。 When copper or aluminum can be laminated on the surface of the magnet 10a by the cold spray method, a metal film (laminated member) is formed on the surface of the magnet 10a without providing the plating layer 10b. It may be.
　また、本実施の形態では、磁石部材１０の主面が矩形をなす板状であるものとして説明したが、この形状に限らず、主面が円または楕円をなすものであってもよいし、球状をなすものであってもよい。各形状の磁石部材の表面に金属皮膜を形成することで積層体の作製が可能である。 Further, in the present embodiment, the main surface of the magnet member 10 has been described as a rectangular plate shape, but not limited to this shape, the main surface may be a circle or an ellipse, It may be spherical. A laminate can be produced by forming a metal film on the surface of each shaped magnet member.
　以上のように、本発明にかかる積層体および積層体の製造方法は、磁性を変化させることなく磁石部材と取付部材とを接合するのに有用である。 As described above, the laminate and the method for producing the laminate according to the present invention are useful for joining the magnet member and the attachment member without changing the magnetism.
　１　積層体
　１０　磁石部材
　１０ａ　磁石
　１０ｂ　メッキ層
　１１　積層部材
　２０　コールドスプレー装置
　２１　ガス加熱器
　２２　粉末供給装置
　２３　ガスノズル
　２４　スプレーガン
　２５，２６　バルブ DESCRIPTION OF SYMBOLS 1 Laminated body 10 Magnet member 10a Magnet 10b Plating layer 11 Laminated member 20 Cold spray apparatus 21 Gas heater 22 Powder supply apparatus 23 Gas nozzle 24 Spray gun 25, 26 Valve

Claims (5)

  1. 　磁石を有する磁石部材と、
    　前記磁石部材に積層され、金属材料を含む粉体をガスと共に加速し、前記磁石部材の表面に固相状態のままで吹き付けて堆積させることによって形成される金属皮膜からなる積層部材と、
    　を備えたことを特徴とする積層体。     A magnet member having a magnet;
    A laminated member made of a metal film that is laminated on the magnet member and is formed by accelerating a powder containing a metal material together with a gas and spraying and depositing the powder on the surface of the magnet member in a solid state;
    A laminate comprising:
  2. 　前記磁石部材は、前記磁石の表面を覆うメッキ層を有することを特徴とする請求項１に記載の積層体。 The laminate according to claim 1, wherein the magnet member has a plating layer covering a surface of the magnet.
  3. 　前記磁石は、希土類磁石であることを特徴とする請求項１または２に記載の積層体。 The laminate according to claim 1 or 2, wherein the magnet is a rare earth magnet.
  4. 　前記金属材料は、銅またはアルミニウムのうちのいずれかであることを特徴とする請求項１～３のいずれか一つに記載の積層体。 The laminate according to any one of claims 1 to 3, wherein the metal material is copper or aluminum.
  5. 　磁石部材と、該磁石部材に積層する積層部材としての金属皮膜と、からなる積層体の製造方法であって、
    　前記磁石部材の表面に、銅またはアルミニウムからなる金属材料を含む粉体をガスと共に加速し、前記表面に固相状態のままで吹き付けて堆積させることによって前記金属皮膜を形成させることを特徴とする積層体の製造方法。     A method for producing a laminate comprising a magnet member and a metal film as a laminate member laminated on the magnet member,
    The metal film is formed on the surface of the magnet member by accelerating a powder containing a metal material made of copper or aluminum together with a gas and spraying and depositing the powder in the solid state on the surface. A manufacturing method of a layered product.
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