CN103441625B - A kind of selective plating method of rare-earth permanent magnet motor rotor magnetic shoe - Google Patents
A kind of selective plating method of rare-earth permanent magnet motor rotor magnetic shoe Download PDFInfo
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- CN103441625B CN103441625B CN201310400521.1A CN201310400521A CN103441625B CN 103441625 B CN103441625 B CN 103441625B CN 201310400521 A CN201310400521 A CN 201310400521A CN 103441625 B CN103441625 B CN 103441625B
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- magnetic shoe
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Abstract
The invention discloses a kind of selective plating method of rare-earth permanent magnet motor rotor magnetic shoe, comprise the following steps: the purified treatment before magnetic shoe matrix is electroplated; The overlay film that can remove after magnetic shoe matrix brushes solidification on the surface connecting rotor; After overlay film solidification, electroplating processes is carried out to magnetic shoe matrix; Remove overlay film, is come out in the surface that magnetic shoe matrix is used for connecting rotor; Purified treatment is carried out on the surface that magnetic shoe matrix is used for connecting rotor; Advantage is that magnetic shoe matrix is not plated layer covering for the surface connecting rotor, avoid electrodeposited coating surface because of surface energy lower, or the adhesion between electrodeposited coating and magnetic shoe matrix is poor, and the rotor occurred is under high temperature and high speed rotates, the phenomenon that magnetic shoe is thrown out of, enhances the adhesive strength between magnetic shoe and rotor, and magnetic shoe corrosion resistance is stronger, and the precision of rotor can not be affected, be applicable to the rotor of various requirement.
Description
Technical field
The present invention relates to a kind of electro-plating method of magnetic shoe, especially relate to a kind of selective plating method of rare-earth permanent magnet motor rotor magnetic shoe.
Background technology
Along with rare earth permanent-magnetic material performance improve constantly and perfect, the particularly improvement of the thermal stability of Nd-Fe-Bo permanent magnet material and further developing and improving of power electronic element, the application of rare-earth permanent-magnet electric machine and exploitation enter a new stage, current motor forward ultrahigh speed, high temperature resistant future development.For this reason, require also just more and more higher to the making of the rare earth permanent-magnetic material that can work under high speed and hot environment matched with it.
Rare-earth permanent magnet motor rotor assembly generally comprises rotor and sticks to the magnetic shoe on rotor outer surface, and in order to ensure the corrosion resistance of motor rotor component, rotor and magnetic shoe all need to carry out electroplating processes.The electro-plating method of existing rare-earth permanent magnet motor rotor magnetic shoe has two kinds usually, first method is electroplated by magnetic shoe matrix entirety, in the magnetic shoe obtained, the surface of magnetic shoe matrix is all plated layer covering, and magnetic shoe is connected on the rotor after plating by bonding agent; Be first use bonding agent to be connected on rotor magnetic shoe matrix in second method, then the rotor linked together and magnetic shoe matrix entirety 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 is the surface energy (wettability) covering the electrodeposited coating of magnetic shoe on the surface connecting rotor, the surface energy of this electrodeposited coating is higher (wettability is better), the compatibility of this electrodeposited coating and bonding agent is better, bonding force is between the two larger, rotor at high temperature High Rotation Speed time, magnetic shoe is more not easy to come off from rotor, otherwise, bonding force is between the two less, magnetic shoe is easier to come off from rotor, second factor covers the electrodeposited coating of magnetic shoe on the surface connecting rotor and the adhesion of magnetic shoe matrix, adhesion is between the two larger, rotor at high temperature High Rotation Speed time, this electrodeposited coating is not easy to be peeled off from magnetic shoe matrix by bonding agent, thus magnetic shoe more can not come off from rotor, otherwise adhesion is between the two less, this electrodeposited coating is more easily by bonding agent drawing crack, and magnetic shoe is easier to come off from rotor.In above-mentioned first method, due to the limitation of electro-plating method, adhesive strength between magnetic shoe and rotor is poor, the surface energy of electrodeposited coating is lower, adhesion between electrodeposited coating and magnetic shoe matrix is lower, when rotor in high temperature environments High Rotation Speed time, magnetic shoe easily from rotor depart from throw away, cause the accident.Although above-mentioned second method meets the rotor requirement that magnetic shoe can not come off from rotor when high temperature and high speed rotates, but because bonding agent is non-conductive in this method, some position that usually there will be motor rotor component is not plated the phenomenon of layer covering, thus these positions can be oxidized very soon and corrode, and can very fast inwardly expansion come, corrosion resistance is poor; Further, said method is to requiring that higher rotor (as endoporus, the external diameter of axle) can not be suitable for, because after implementing plating, 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 in high temperature environments High Rotation Speed time, magnetic shoe can not depart from from electronics rotor, and corrosion resistance is comparatively strong, is applicable to the selective plating method of the rare-earth permanent magnet motor rotor magnetic shoe of the rotor of various requirement.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of selective plating method of rare-earth permanent magnet motor rotor magnetic shoe, comprises the following steps:
1. the purified treatment before magnetic shoe matrix being electroplated;
The overlay film with anticorrosive property that 2. can remove after magnetic shoe matrix brushes solidification on the surface connecting rotor;
3., after overlay film solidification, electroplating processes is carried out to magnetic shoe matrix;
4. remove overlay film, is come out in the surface that magnetic shoe matrix is used for connecting rotor;
5. local sandblasting purified treatment is carried out on the surface being used for magnetic shoe matrix to connect rotor.
Described step 2. middle overlay film comprises following component:
Methacrylate, mass percent is 30% ~ 60%;
Metering system ethyl ester, mass percent is 30% ~ 50%;
Sodium carboxymethylcellulose, mass percent is 10% ~ 20%.
Described step 5. middle purified treatment is local sandblasting.
Described local blasting treatment process is:
5.-1 preparation sandblasting special fixture: get a substrate, described substrate is offered the counterbore that a size is identical with magnetic shoe overall dimension; The substrate that described counterbore is just right is offered a window communicated with described counterbore, the size of described window with magnetic shoe matrix for being connected the equal and opposite in direction without coating surface of rotor, when in the counterbore described in magnetic shoe loads, magnetic shoe matrix is just exposed in described window to described window for what connect rotor without coating surface completely;
5.-2 by magnetic shoe load described in counterbore in, during installation, magnetic shoe matrix is for connecting the surface of rotor just to counterbore, after installation magnetic shoe matrix for connect rotor without coating surface just to described window;
5.-3 carry out sandblasting towards the magnetic shoe matrix in window, taking-up magnetic shoe after completing.
Compared with prior art, the invention has the advantages that by brushing the overlay film that can remove after solidification on the surface connecting rotor at magnetic shoe matrix; After overlay film solidification, electroplating processes is carried out to magnetic shoe matrix; Now, magnetic shoe matrix is not plated layer for the surface connecting rotor and covers, this surface is directly connected with rotor by bonding agent, avoid electrodeposited coating surface because of surface energy lower, or the adhesion between electrodeposited coating and magnetic shoe matrix is poor, and the rotor occurred is under high temperature and high speed rotates, the phenomenon that magnetic shoe is thrown out of, effectively enhance the adhesive strength between magnetic shoe and rotor, extend the useful life of motor; In addition, in method of the present invention, magnetic shoe matrix does not need to be connected to by binding agent to carry out entirety plating after on rotor and obtain magnetic shoe, and magnetic shoe corrosion resistance is comparatively strong, and can not affect the precision of rotor, is applicable to the rotor of various requirement;
When overlay film comprise mass percent be 30% ~ 60% methacrylate, mass percent be 30% ~ 50% metering system ethyl ester and mass percent be the sodium carboxymethylcellulose of 10% ~ 20% time, the overlay film prepared according to the above ratio is after being brushed to magnetic shoe surface, (can need not carry out special heating cure) at normal temperatures, just can be solidified within a few minutes, it is extremely convenient to operate; The overlay film prepared according to the above ratio has extremely strong anti-chemical corrosive nature, when electroplating, can not be corroded because of the strong acid and strong base characteristic of plating solution; The overlay film prepared according to the above ratio and magnetic shoe matrix have certain adhesion, and this adhesion is enough to the requirement that can not come off from magnetic shoe matrix when meeting plating, simultaneously after plating, can effortlessly tear from magnetic shoe, keeps integrality.
After removing overlay film, when local blasting treatment is carried out for the surface connecting rotor to magnetic shoe matrix, when this surface is connected on rotor by binding agent, the adhesive strength between magnetic shoe and rotor can be improved.
Accompanying drawing explanation
Fig. 1 is the magnetic shoe matrix stereogram of brushing overlay film before plating in the inventive method;
Fig. 2 is the magnetic shoe stereogram in the inventive method after plating;
Fig. 3 is magnetic shoe that the inventive method obtains is connected on rotor stereogram by bonding agent;
Fig. 4 is the stereogram of sandblasting special fixture;
Fig. 5 is the front view of sandblasting special fixture;
Fig. 6 is the cutaway view of sandblasting special fixture;
Fig. 7 is front view when being provided with magnetic shoe in sandblasting special fixture;
Fig. 8 is cutaway view when being provided with magnetic shoe in sandblasting special fixture.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one: as shown in FIG. 1 to 3, a kind of selective plating method of rare-earth permanent magnet motor rotor magnetic shoe, 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 the grease on magnetic shoe matrix 1 surface;
2. magnetic shoe matrix 1 for connect rotor surface 11 on the overlay film 2 with anticorrosive property that can remove after brushing solidification;
3. after overlay film 2 solidifies, electroplating processes is carried out to magnetic shoe matrix 1, now, magnetic shoe matrix 1 does not have the surface of overlay film 2 all by electrodeposited coating 12 is covered, and the local electrodeposited coating 12 that on magnetic shoe matrix 1, film 2 covers can not arrive;
4. removing overlay film 2, comes out in the surface 11 being used for magnetic shoe matrix 1 to connect rotor 3;
5. purified treatment is carried out on the surface 11 being used for magnetic shoe matrix 1 connecting rotor 3, and purified treatment is local sandblasting, obtains 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%; Metering system ethyl ester, mass percent is 50%; Sodium carboxymethylcellulose, mass percent is 20%.At normal temperatures, above-mentioned several component is mixed according to the ratio of correspondence and brushes after stirring form overlay film 2 on magnetic shoe matrix 1, at normal temperatures, overlay film 2 i.e. rapid solidification after a few minutes.
After adopting the method for the present embodiment to obtain rare-earth permanent magnet motor rotor magnetic shoe, magnetic shoe matrix 1 for connect rotor surface 11 on brushing one deck bonding agent, rare-earth permanent magnet motor rotor magnetic shoe is connected to rotor 3 by bonding agent and gets on, bonding rotor is placed the regular hour under given conditions, and the connection just completing magnetic shoe and rotor makes.
Embodiment two: the present embodiment is substantially identical with embodiment one, difference to be only in the present embodiment that overlay film 2 comprises following component during step is 2.: methacrylate, and mass percent is 60%; Metering system ethyl ester, mass percent is 30%; Sodium carboxymethylcellulose, mass percent is 10%.At normal temperatures, above-mentioned several component is mixed according to the ratio of correspondence and brushes after stirring form overlay film 2 on magnetic shoe matrix 1, at normal temperatures, overlay film 2 i.e. rapid solidification after a few minutes.
Embodiment three: the present embodiment is substantially identical with embodiment one, difference to be only in the present embodiment that overlay film 2 comprises following component during step is 2.: methacrylate, and mass percent is 45%; Metering system ethyl ester, mass percent is 40%; Sodium carboxymethylcellulose, mass percent is 15%.At normal temperatures, above-mentioned several component is mixed according to the ratio of correspondence and brushes after stirring form overlay film 2 on magnetic shoe matrix 1, at normal temperatures, overlay film 2 i.e. rapid solidification after a few minutes.
Embodiment four: the present embodiment is on the basis of above-mentioned all embodiments.When local sandblasting, concrete processing procedure is: first make sandblasting special fixture: get a substrate 4, substrate 4 is offered the counterbore 5 that a size is identical with magnetic shoe overall dimension; The substrate 4 that counterbore 5 is just right is offered a window 6 communicated with counterbore 5, the size of window 6 with magnetic shoe matrix 1 for being connected the surperficial 11(of rotor without coating face) equal and opposite in direction, when magnetic shoe loads in counterbore 5, magnetic shoe matrix 1 is just exposed in window 6 to window 6 for the surface 11 connecting rotor completely, and concrete structure as shown in Figure 4 and Figure 5; Loaded by magnetic shoe in counterbore 5, during installation, magnetic shoe matrix 1 is for connecting the surface 11 of rotor just to counterbore 5, and after installation, magnetic shoe matrix 1 is for connecting the surface 11 of rotor just to window 6, as shown in Figure 6; Sandblasting is carried out, taking-up magnetic shoe after completing in the surface 11 of the magnetic shoe matrix 1 exposed in window 6.
In the present embodiment, substrate 4 can select 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, after obtaining the rare-earth permanent magnet motor rotor magnetic shoe of surface cleaning, magnetic shoe matrix 1 for connect rotor surface 11 on brushing one deck bonding agent, when rare-earth permanent magnet motor rotor magnetic shoe by bonding agent be connected to rotor 3 get on time, magnetic shoe surrounding seals middle for the surface 11 being used for connecting rotor from magnetic shoe matrix 1 to surrounding spilling by unnecessary bonding agent, now, electrodeposited coating 12 is sealed by bonding agent completely with the junction of magnetic shoe matrix 1 for the surface 11 being connected rotor, magnetic shoe can be avoided oxidized and adhesion strength between magnetic shoe and rotor is larger.The regular hour placed by bonding rotor, and the connection just completing magnetic shoe and rotor makes.
Claims (2)
1. a selective plating method for rare-earth permanent magnet motor rotor magnetic shoe, is characterized in that comprising the following steps:
1. the purified treatment before magnetic shoe matrix being electroplated;
The overlay film with anticorrosive property that 2. can remove after magnetic shoe matrix brushes solidification on the surface connecting rotor;
3., after overlay film solidification, electroplating processes is carried out to magnetic shoe matrix;
4. remove overlay film, is come out in the surface that magnetic shoe matrix is used for connecting rotor;
5. purified treatment is carried out on the surface being used for magnetic shoe matrix to connect rotor;
Described step 2. middle overlay film comprises following component:
Methacrylate, mass percent is 30% ~ 60%;
Metering system ethyl ester, mass percent is 30% ~ 50%;
Sodium carboxymethylcellulose, mass percent is 10% ~ 20%;
Described step 5. middle purified treatment is local sandblasting.
2. the selective plating method of a kind of rare-earth permanent magnet motor rotor magnetic shoe according to claim 1, is characterized in that described local blasting treatment process is:
5.-1 preparation sandblasting special fixture: get a substrate, described substrate is offered the counterbore that a size is identical with magnetic shoe overall dimension; The substrate that described counterbore is just right is offered a window communicated with described counterbore, the size of described window with magnetic shoe matrix for being connected the equal and opposite in direction without coating surface of rotor, when in the counterbore described in magnetic shoe loads, magnetic shoe matrix is just exposed in described window to described window for what connect rotor without coating surface completely;
5.-2 by magnetic shoe load described in counterbore in, during installation, magnetic shoe matrix is for connecting the surface of rotor just to counterbore, after installation magnetic shoe matrix for connect rotor without coating surface just to described window;
5.-3 carry out sandblasting towards the magnetic shoe matrix in window, taking-up magnetic shoe after completing.
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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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| 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 CN103441625A (en) | 2013-12-11 |
| CN103441625B true CN103441625B (en) | 2015-08-26 |
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| 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 |
| 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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| CN1075730A (en) * | 1992-02-23 | 1993-09-01 | 雷廷扬 | The preparation of isolative painting for electroplating |
| CN1548272A (en) * | 2003-05-08 | 2004-11-24 | 罗继林 | Local sand blasting method |
| CN1632174A (en) * | 2004-11-09 | 2005-06-29 | 徐菁 | Electroplating isolation glue |
| CN101373651B (en) * | 2007-08-23 | 2011-12-07 | 北京中科三环高技术股份有限公司 | Surface pretreating method of wet method spray sand type neodymium iron boron permanent magnetic material |
| CN101302636A (en) * | 2008-01-18 | 2008-11-12 | 深圳市深南电路有限公司 | Metal piece electroplating method |
| CN102260456A (en) * | 2010-05-31 | 2011-11-30 | 比亚迪股份有限公司 | Organosilicon coating material used for electroplating and its preparation method, and protective coating layer used for electroplating |
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