CN103441625A - Local electroplating method of magnetic tile for rare earth permanent magnet motor rotor - Google Patents
Local electroplating method of magnetic tile for rare earth permanent magnet motor rotor Download PDFInfo
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- CN103441625A CN103441625A CN2013104005211A CN201310400521A CN103441625A CN 103441625 A CN103441625 A CN 103441625A CN 2013104005211 A CN2013104005211 A CN 2013104005211A CN 201310400521 A CN201310400521 A CN 201310400521A CN 103441625 A CN103441625 A CN 103441625A
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- magnetic shoe
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- magnetic tile
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Abstract
The invention discloses a local electroplating method of a magnetic tile for a rare earth permanent magnet motor rotor. The local electroplating method comprises the following steps: a purifying process is performed on a magnetic tile matrix before electroplating; the surface, which is used for connecting the motor rotor, of the magnetic tile matrix is painted with an overlay film capable of being dilacerated after solidification; after the overlay film is solidified, an electroplating process is performed on the magnetic tile matrix; the overlay film is dilacerated, and the surface, which is used for connecting the motor rotor, of the magnetic tile matrix is exposed; and the surface, which is used for connecting the motor rotor, of the magnetic tile matrix is purified. Advantages of the local electroplating method are that the surface, which is used for connecting the motor rotor, of the magnetic tile matrix is not covered by an electroplating layer so that a phenomenon that the magnetic tile is thrown out caused by that fact that the surface of the electroplating layer is relatively low in surface energy, or binding force between the electroplating layer and the magnetic tile matrix is poor when the motor rotor rotates under high temperature and high speed state is avoided. Therefore, binging strength between the magnetic tile and the motor rotor is enhanced. Besides, the magnetic tile is relatively high in corrosion resistance, and accuracy of the motor rotor is not affected so that the local electroplating method is applicable to motor rotors with various requirements.
Description
Technical field
The present invention relates to a kind of electro-plating method of magnetic shoe, especially relate to the selective plating method of a kind of rare-earth permanent magnet motor rotor with magnetic shoe.
Background technology
Along with the rare earth permanent-magnetic material performance improve constantly and perfect, particularly the improvement of the thermal stability of Nd-Fe-Bo permanent magnet material and power electronic element further developing and improving, the application of rare-earth permanent-magnet electric machine and exploitation have entered a new stage, at present motor forward ultrahigh speed, high temperature resistant future development.For this reason, to match with it can at a high speed and the making of the rare earth permanent-magnetic material that work under hot environment require also just more and more higher.
The rare-earth permanent magnet motor rotor assembly generally comprises rotor and sticks to the magnetic shoe on the rotor outer surface, and in order to guarantee the corrosion resistance of motor rotor component, rotor and magnetic shoe all need to carry out electroplating processes.Existing rare-earth permanent magnet motor rotor has two kinds usually with the electro-plating method of magnetic shoe, first method is electroplated by magnetic shoe matrix integral body, in the magnetic shoe obtained, the surface of magnetic shoe matrix all is plated layer and covers, and magnetic shoe is connected on the rotor after plating by bonding agent; Be first to use bonding agent to be connected on rotor the magnetic shoe matrix in second method, then the rotor and the magnetic shoe matrix integral body that link together electroplated.Intensity in above-mentioned first method between bonding agent and magnetic shoe, we are called bonding force, the size of this cohesive force depends on two factors: first factor be cover magnetic shoe can (wettability) for the surface of the lip-deep electrodeposited coating that connects rotor, the surface of this electrodeposited coating can higher (wettability be better), the compatibility of this electrodeposited coating and bonding agent is better, bonding force between the two is just larger, rotor is at high temperature during High Rotation Speed, magnetic shoe more is not easy to come off from rotor, otherwise, bonding force between the two is just less, magnetic shoe just more easily comes off from rotor, second factor is to cover magnetic shoe for the lip-deep electrodeposited coating that connects rotor and the adhesion of magnetic shoe matrix, adhesion between the two is larger, rotor is at high temperature during High Rotation Speed, this electrodeposited coating is not easy to be peeled off from the magnetic shoe matrix by bonding agent, thereby magnetic shoe more can not come off from rotor, otherwise adhesion between the two is less, this electrodeposited coating is just more easily by the bonding agent drawing crack, and magnetic shoe just more easily comes off from rotor.In above-mentioned first method, limitation due to electro-plating method, adhesive strength between magnetic shoe and rotor is poor, the surface of electrodeposited coating can be lower, adhesion between electrodeposited coating and magnetic shoe matrix is lower, when rotor, under hot environment during High Rotation Speed, magnetic shoe easily breaks away from and throws away from rotor, causes the accident.Although above-mentioned second method has met the rotor requirement that magnetic shoe can not come off from rotor when high temperature and high speed rotates, but in this method because bonding agent is non-conductive, usually there will be some position of motor rotor component not to be plated the phenomenon that layer covers, thereby these positions are can be very fast oxidized and corrode, and can very fast inwardly expansion come, corrosion resistance is poor; And said method can not be suitable for the rotor (as endoporus, the external diameter of axle) of having relatively high expectations, because, after implementing to electroplate, the size at some position of rotor will not reach requirement.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of adhesive strength that can improve between magnetic shoe and rotor, when rotor under hot environment during High Rotation Speed, magnetic shoe can not break away from from the electronics rotor, and corrosion resistance is stronger, the rare-earth permanent magnet motor rotor selective plating method of magnetic shoe that is applicable to the rotor of various requirement.
The present invention solves the problems of the technologies described above adopted technical scheme: the selective plating method of magnetic shoe for a kind of rare-earth permanent magnet motor rotor comprises the following steps:
1. the purified treatment before the magnetic shoe matrix being electroplated;
2. at the magnetic shoe matrix for connecting the overlay film with anticorrosive property that on the surface of rotor, brushing can remove after solidifying;
3. after overlay film solidifies, the magnetic shoe matrix is carried out to electroplating processes;
4. remove overlay film, the magnetic shoe matrix is come out for the surface that connects rotor;
5. the magnetic shoe matrix is carried out to local sandblast purified treatment for the surface that connects rotor.
Described step 2. middle overlay film comprises following component:
Methacrylate, mass percent is 30%～60%;
The metering system ethyl ester, mass percent is 30%～50%;
Sodium carboxymethylcellulose, mass percent is 10%～20%.
Described step 5. middle purified treatment is local sandblast.
Described local blasting treatment process is:
5.-1 preparation sandblast special fixture: get a substrate, offer a counterbore that size is identical with magnetic shoe overall dimension on described substrate; Described counterbore over against substrate on offer a window communicated with described counterbore, the size of described window and magnetic shoe matrix are for being connected the equal and opposite in direction without coating surface of rotor, in the time of within magnetic shoe is packed described counterbore into, the magnetic shoe matrix for connect rotor without coating surface over against described window and be exposed to described window fully;
5.-2 pack magnetic shoe in described counterbore into, during installation the magnetic shoe matrix for the surface that connects rotor over against counterbore, after installation the magnetic shoe matrix for connect rotor without coating surface over against described window;
5.-3 carry out sandblast, taking-up magnetic shoe after completing towards the magnetic shoe matrix in window.
Compared with prior art, the invention has the advantages that by the magnetic shoe matrix for the surface that connects rotor on the brushing overlay film that can remove after solidifying; After overlay film solidifies, the magnetic shoe matrix is carried out to electroplating processes; Now, the magnetic shoe matrix is not plated layer for the surface that connects rotor and covers, this surface directly is connected with rotor by bonding agent, avoided the electrodeposited coating surface can be lower because of surface, or the adhesion between electrodeposited coating and magnetic shoe matrix is poor, and the rotor occurred is under the high temperature and high speed rotation, the phenomenon that magnetic shoe is thrown out of, effectively strengthen the adhesive strength between magnetic shoe and rotor, extended the useful life of motor; In addition, in method of the present invention, the magnetic shoe matrix carries out integral body and electroplates and to obtain magnetic shoe after not needing to be connected on rotor by binding agent, and the magnetic shoe corrosion resistance is stronger, and can not affect the precision of rotor, is applicable to the rotor of various requirement;
When overlay film comprises the sodium carboxymethylcellulose that methacrylate that mass percent is 30%～60%, metering system ethyl ester that mass percent is 30%～50% and mass percent are 10%～20%, the overlay film of preparation is after being brushed to the magnetic shoe surface according to the above ratio, can (need not carry out special heating cure) at normal temperatures, just can within a few minutes, be solidified, it is extremely convenient to operate; The overlay film of preparation has extremely strong anti-chemical corrosive nature according to the above ratio, when electroplating, can not be corroded because of the strong acid and strong base characteristic of plating solution; Overlay film and the magnetic shoe matrix of preparation have certain adhesion according to the above ratio, and this adhesion is enough to meet the requirement that can not come off from the magnetic shoe matrix while electroplating, and after electroplating, can effortlessly from magnetic shoe, tear simultaneously, keep integrality.
After removing overlay film, when the magnetic shoe matrix is carried out to local blasting treatment for the surface that connects rotor, when this surface is connected on rotor by binding agent, can improve the adhesive strength between magnetic shoe and rotor.
The accompanying drawing explanation
The magnetic shoe matrix stereogram that Fig. 1 is brushing overlay film before electroplating in the inventive method;
Fig. 2 is the magnetic shoe stereogram after electroplating in the inventive method;
Fig. 3 is that the magnetic shoe that the inventive method obtains is connected to the stereogram on rotor by bonding agent;
The stereogram that Fig. 4 is the sandblast special fixture;
The front view that Fig. 5 is the sandblast special fixture;
The cutaway view that Fig. 6 is the sandblast special fixture;
Fig. 7 is the front view while in the sandblast special fixture, magnetic shoe being installed;
Fig. 8 is the cutaway view while in the sandblast special fixture, magnetic shoe being installed.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
Embodiment mono-: as shown in FIG. 1 to 3, the selective plating method of magnetic shoe for a kind of rare-earth permanent magnet motor rotor comprises the following steps:
1. the purified treatment before magnetic shoe matrix 1 being electroplated: adopt acid cleaning process to remove the foreign material such as grease on magnetic shoe matrix 1 surface;
2. magnetic shoe matrix 1 for the surface 11 that connects rotor on the brushing overlay film with anticorrosive property 2 that can remove after solidifying;
3. after overlay film 2 solidifies, magnetic shoe matrix 1 is carried out to electroplating processes, now, on magnetic shoe matrix 1, do not have the surface of overlay film 2 all to be covered by electrodeposited coating 12, and the local electrodeposited coating 12 covered by overlay film 2 on magnetic shoe matrix 1 can not arrive;
4. remove overlay film 2, magnetic shoe matrix 1 is come out for the surface 11 that connects rotor 3;
5. magnetic shoe matrix 1 is carried out to purified treatment for the surface 11 that connects rotor 3, purified treatment is local sandblast, obtains the rare-earth permanent magnet motor rotor magnetic shoe.
In the present embodiment, step 2. middle overlay film 2 comprises following component: methacrylate, and mass percent is 30%; The metering system ethyl ester, mass percent is 50%; Sodium carboxymethylcellulose, mass percent is 20%.At normal temperatures, above-mentioned several components are mixed according to corresponding ratio and the rear brushing that stirs forms overlay film 2 on magnetic shoe matrix 1, at normal temperatures, after a few minutes, overlay film 2 solidifies rapidly.
Adopt the method for the present embodiment to obtain rare-earth permanent magnet motor rotor with after magnetic shoe, magnetic shoe matrix 1 for the surface 11 that connects rotor on brushing one deck bonding agent, rare-earth permanent magnet motor rotor is connected to rotor 3 with magnetic shoe by bonding agent and gets on, bonding rotor is placed the regular hour under given conditions, and the connection that has just completed magnetic shoe and rotor is made.
Embodiment bis-: the present embodiment and embodiment mono-are basic identical, and difference only is in the present embodiment during step is 2. that overlay film 2 comprises following component: methacrylate, and mass percent is 60%; The metering system ethyl ester, mass percent is 30%; Sodium carboxymethylcellulose, mass percent is 10%.At normal temperatures, above-mentioned several components are mixed according to corresponding ratio and the rear brushing that stirs forms overlay film 2 on magnetic shoe matrix 1, at normal temperatures, after a few minutes, overlay film 2 solidifies rapidly.
Embodiment tri-: the present embodiment and embodiment mono-are basic identical, and difference only is in the present embodiment during step is 2. that overlay film 2 comprises following component: methacrylate, and mass percent is 45%; The metering system ethyl ester, mass percent is 40%; Sodium carboxymethylcellulose, mass percent is 15%.At normal temperatures, above-mentioned several components are mixed according to corresponding ratio and the rear brushing that stirs forms overlay film 2 on magnetic shoe matrix 1, at normal temperatures, after a few minutes, overlay film 2 solidifies rapidly.
Embodiment tetra-: the present embodiment is on the basis of above-mentioned all embodiment.When local sandblast, concrete processing procedure is: at first make the sandblast special fixture: get a substrate 4, offer a counterbore 5 that size is identical with magnetic shoe overall dimension on substrate 4; Counterbore 5 over against substrate 4 on offer a window 6 communicated with counterbore 5, the size of window 6 and magnetic shoe matrix 1 for the surperficial 11(that is connected rotor without the coating face) equal and opposite in direction, when magnetic shoe is packed counterbore 5 into when interior, magnetic shoe matrix 1 is for the surface 11 that connects rotor over against window 6 and be exposed to window 6 fully, and concrete structure as shown in Figure 4 and Figure 5; Magnetic shoe is packed in counterbore 5, during installation magnetic shoe matrix 1 for the surface 11 that connects rotor over against counterbore 5, after installation magnetic shoe matrix 1 for the surface 11 that connects rotor over against window 6, as shown in Figure 6; Sandblast is carried out, taking-up magnetic shoe after completing in surface 11 towards the magnetic shoe matrix 1 of window 6 interior exposures.
In the present embodiment, substrate 4 can be selected arc, and counterbore 5 is opened on the periphery of arc, and window 6 is opened on the inner headed face of arc.
In the present embodiment, obtain the rare-earth permanent magnet motor rotor of surface cleaning with after magnetic shoe, magnetic shoe matrix 1 for the surface 11 that connects rotor on brushing one deck bonding agent, when rare-earth permanent magnet motor rotor is connected to rotor 3 and gets on by bonding agent with magnetic shoe, unnecessary bonding agent will be from magnetic shoe matrix 1 for overflowing the magnetic shoe surrounding sealed to surrounding in the middle of the surface 11 that connects rotor, now, electrodeposited coating 12 and magnetic shoe matrix 1 are sealed by bonding agent fully for the junction on the surface 11 that is connected rotor, can avoid the adhesion strength between magnetic shoe oxidized and magnetic shoe and rotor larger.Bonding rotor is placed the regular hour, and the connection that has just completed magnetic shoe and rotor is made.
Claims (4)
1. the selective plating method of magnetic shoe for a rare-earth permanent magnet motor rotor is characterized in that comprising the following steps:
1. the purified treatment before the magnetic shoe matrix being electroplated;
2. at the magnetic shoe matrix for connecting the overlay film with anticorrosive property that on the surface of rotor, brushing can remove after solidifying;
3. after overlay film solidifies, the magnetic shoe matrix is carried out to electroplating processes;
4. remove overlay film, the magnetic shoe matrix is come out for the surface that connects rotor;
5. the magnetic shoe matrix is carried out to purified treatment for the surface that connects rotor.
2. the selective plating method of magnetic shoe for a kind of rare-earth permanent magnet motor rotor according to claim 1 is characterized in that during described step is 2. that overlay film comprises following component:
Methacrylate, mass percent is 30%～60%;
The metering system ethyl ester, mass percent is 30%～50%;
Sodium carboxymethylcellulose, mass percent is 10%～20%.
3. the selective plating method of magnetic shoe for a kind of rare-earth permanent magnet motor rotor according to claim 1, is characterized in that during described step 5. that purified treatment is local sandblast.
4. the selective plating method of magnetic shoe for a kind of rare-earth permanent magnet motor rotor according to claim 3 is characterized in that described local blasting treatment process is:
5.-1 preparation sandblast special fixture: get a substrate, offer a counterbore that size is identical with magnetic shoe overall dimension on described substrate; Described counterbore over against substrate on offer a window communicated with described counterbore, the size of described window and magnetic shoe matrix are for being connected the equal and opposite in direction without coating surface of rotor, in the time of within magnetic shoe is packed described counterbore into, the magnetic shoe matrix for connect rotor without coating surface over against described window and be exposed to described window fully;
5.-2 pack magnetic shoe in described counterbore into, during installation the magnetic shoe matrix for the surface that connects rotor over against counterbore, after installation the magnetic shoe matrix for connect rotor without coating surface over against described window;
5.-3 carry out sandblast, taking-up magnetic shoe after completing towards the magnetic shoe matrix in window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310400521.1A CN103441625B (en) | 2013-09-05 | 2013-09-05 | A kind of selective plating method of rare-earth permanent magnet motor rotor magnetic shoe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310400521.1A CN103441625B (en) | 2013-09-05 | 2013-09-05 | A kind of selective plating method of rare-earth permanent magnet motor rotor magnetic shoe |
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| CN103441625A true CN103441625A (en) | 2013-12-11 |
| CN103441625B CN103441625B (en) | 2015-08-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106737213A (en) * | 2017-01-03 | 2017-05-31 | 江苏中车电机有限公司 | A kind of yoke blasting craft of permanent magnet direct-driving aerogenerator rotor field spider |
| CN109428414A (en) * | 2017-08-25 | 2019-03-05 | 上海电驱动股份有限公司 | A kind of by-pass shunt formula permanent magnet |
| CN110802521A (en) * | 2019-11-15 | 2020-02-18 | 贵州航天南海科技有限责任公司 | Local sand blasting method for part |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106737213A (en) * | 2017-01-03 | 2017-05-31 | 江苏中车电机有限公司 | A kind of yoke blasting craft of permanent magnet direct-driving aerogenerator rotor field spider |
| CN109428414A (en) * | 2017-08-25 | 2019-03-05 | 上海电驱动股份有限公司 | A kind of by-pass shunt formula permanent magnet |
| CN110802521A (en) * | 2019-11-15 | 2020-02-18 | 贵州航天南海科技有限责任公司 | Local sand blasting method for part |
| CN110802521B (en) * | 2019-11-15 | 2021-08-31 | 贵州航天南海科技有限责任公司 | Local sand blasting method for part |
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| CN103441625B (en) | 2015-08-26 |
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