CN104875106A - Grinding and polishing process and abrasive for inner bore of small circular ring sintered NdFeB magnet - Google Patents
Grinding and polishing process and abrasive for inner bore of small circular ring sintered NdFeB magnet Download PDFInfo
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- CN104875106A CN104875106A CN201510230360.5A CN201510230360A CN104875106A CN 104875106 A CN104875106 A CN 104875106A CN 201510230360 A CN201510230360 A CN 201510230360A CN 104875106 A CN104875106 A CN 104875106A
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- Prior art keywords
- grinding
- polishing process
- abrasive
- product
- beveler
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
- B24B31/067—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers involving a bowl formed as a straight through
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The present invention discloses a grinding and polishing process and abrasive for an inner bore of a small circular ring sintered NdFeB magnet. The grinding and polishing process comprises loading materials, replenishing chamfering liquid, unloading materials, sorting and transferring. The abrasive is mixed abrasive of yellow sand and brown corundum, for processing a 15kg NdFeB product once, 2-3L yellow sand and 25-30kg brown corundum are required in the mixed abrasive, bulk density of the yellow sand is 1-2 g/cm<3>, fineness modulus is 2.0-3.0, and average grain diameter is 0.4-0.6mm. The problem that a sintered magnet with a small hole is difficult to process by a vibrating and rolling chamfering machine can be effectively solved, and the purpose of processing annular magnets with inner bores having small diameters in large batch is achieved by improving the grinding and polishing process and replacing the abrasive.
Description
Technical field
The present invention relates to a kind of endoporus grinding and polishing process and abrasive material of small circle ring Sintered NdFeB magnet, belong to technical field of magnetic materials.
Background technology
Sintered NdFeB rare-earth permanent magnet material possesses higher remanent magnetism, coercivity and magnetic energy product, is widely used in modern industry.But the failure modes such as Sintered NdFeB magnet surface is but very easily oxidized, electrochemical corrosion, suction hydrogen-type corrosion, seriously govern the development of industry.Therefore surface Hardening Treatment is carried out to it and seem particularly important.Electroplating technology is one of important means of neodymium iron boron magnetic body surfacecti proteon.Before electroplating, specially treated must be carried out to magnet surface, to remove the oxide skin, iron rust, burr etc. on surface, also suitably will repair fillet simultaneously.
At present, modal is that utilization is vibrated, rolling beveler carries out surfacing, polishing and chamfering to sintered magnet.Beveler adopts the principle of spiral Rolling flow three-D vibration, and part and grinding stone are ground mutually, thus the oxide skin of removing magnet surface, iron rust and burr etc.May correspond to according to the material of workpiece and the difference of shape and select different grinding stones and grinding aid.The working (machining) efficiency of the method is high, and energy automated job, is applicable to the grinding, polishing, chamfer machining etc. of small-medium size part in enormous quantities.
But vibration, rolling beveler have certain requirement to processed magnet size, its diameter of bore of magnet of band endoporus must be greater than the size of abrasive material, to ensure that abrasive material can form effective grinding, polishing and chamfering etc. to magnet inner hole wall.As everyone knows, the loudspeaker of smart mobile phone, portable computer are made up of sintering magnetic Nd-Fe-B ring mostly, and its diameter of bore is very little, is generally only 2 ~ 3.5mm.The size of beveler abrasive material is generally greater than this kind of magnetic ring inner hole diameter, cause the grinding to its inner hole wall, polishing, endoporus fillet finishing etc. cause great difficulty, be difficult to ensure surface-treated effect, cause the adhesion of galvanization coating low, affect the resistance to corrosion of magnet.
The invention discloses a kind of endoporus grinding and polishing process and abrasive material of small circle ring Sintered NdFeB magnet, overcome vibration, rolling beveler to the problem of processing belt aperture magnet ring difficulty, the very little annular magnet of diameter of bore can be processed in enormous quantities.
Summary of the invention
In order to overcome vibration, rolling beveler is difficult to process narrow meshed sintered magnet, the invention provides a kind of endoporus grinding and polishing process and abrasive material of small circle ring Sintered NdFeB magnet, by improving grinding and polishing process, change abrasive material used, to reach the object of the very little annular magnet of processing diameter of bore in enormous quantities.
The technical solution adopted in the present invention is as follows:
An endoporus grinding and polishing process for small circle ring Sintered NdFeB magnet, comprises the following steps:
A, material loading: first add the abrasive material of regulation material and the chamfering liquid of normal concentration successively, then slowly added in beveler by magnet equably in batches, after checking that beveler is normal, start beveler, setting operating frequency;
B, add chamfering liquid: according to beveler type, charge etc., change a chamfering liquid every special time, before changing chamfering liquid, first old chamfering liquid is got rid of, and rinse well with clear water, the chamfering liquid required by last supplement art;
C, blanking: close down beveler, take out abrasive material and product after stopping completely;
D, sorting: rinse products of separated and abrasive material with clear water, easy arrisdefect or large gauge product should select product one by one gently with hand, the product that size is less, can, according to its different size, select the sorting frame of different sieve aperture to carry out sorting;
E, circulation: after product selecting is complete, be immersed in product in the Turnover Box of water, carry out product identification, and circulation is to respectively treating that pre-treatment is carried out in plated product rest area.
Described chamfering liquid is the aqueous solution of degreasing powder preparation, and water distribution ratio is 1:10-15, and the higher effect of concentration is better.
The operating frequency of described setting is 30Hz.
The described interval time adding chamfering liquid is 4-6 hour.
A described grinding and polishing, chamfer angle technique are always consuming time is 8-16 hour
Described abrasive material is the compound abrasive of yellow ground and Brown Alundum stone, single process 15kg neodymium iron boron product, and in compound abrasive, yellow ground needs 2-3L, and Brown Alundum stone needs 25-30kg, and wherein, the bulk density of yellow ground is 1-2g/cm
3, modulus of fineness is 2.0-3.0, and average grain diameter is 0.4-0.6mm.
Compared with prior art, the invention has the beneficial effects as follows:
The difficult problem that the present invention can solve vibration, rolling beveler is difficult to processing belt aperture sintered magnet, the present invention, by improving grinding and polishing process, changes abrasive material used, reaches the object of the very little annular magnet of processing diameter of bore in enormous quantities.
Accompanying drawing explanation
Fig. 1 is the grinding and polishing in vibration beveler of neodymium iron boron toroidal magnet, chamfering schematic diagram.
In figure, 1. yellow ground; 2. Brown Alundum stone; 3. ringshaped magnet; 4. base; 5. vibrator; 6. vibration container.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, first add the compound abrasive of yellow ground 1 and Brown Alundum stone 2 composition, wherein often process 15kg neodymium iron boron product, in compound abrasive, yellow ground needs 3L, and Brown Alundum stone needs 30kg.The bulk density of yellow ground is 1.5g/cm
3, modulus of fineness is about 3.0, and average grain diameter is about 0.5mm; Then add the chamfering liquid be mixed with degreasing powder, water distribution ratio is 1:10; Finally add the annular magnet 3 of needs processing; After checking that beveler is normal, start beveler, under the effect of vibrator 5, the compound abrasive that yellow ground 1 and Brown Alundum stone 2 form can the inner surface of effectively grinding and polishing annular magnet, and the operating frequency of setting is 30Hz; According to beveler type, charge etc., changed a chamfering liquid every 4-6 hour.Before changing chamfering liquid, first old chamfering liquid is got rid of, and rinse well with clear water, the chamfering liquid required by last supplement art; Finally before blanking, close down beveler, after stopping completely, take out abrasive material and product; A grinding and polishing, chamfer angle technique are always consuming time is 8-16 hour.During sorting magnet, rinse products of separated and abrasive material with clear water, easy arrisdefect or large gauge product should select product one by one gently with hand.The product that size is less, can, according to its different size, select the sorting frame of different sieve aperture to carry out sorting.After product selecting is complete, is immersed in by product in the Turnover Box of water, carries out product identification, circulation is to respectively treating that pre-treatment is carried out in plated product rest area.
Claims (6)
1. an endoporus grinding and polishing process for small circle ring Sintered NdFeB magnet, is characterized in that comprising the following steps:
A, material loading: first add the abrasive material of regulation material and the chamfering liquid of normal concentration successively, then slowly added in beveler by magnet equably in batches, after checking that beveler is normal, start beveler, setting operating frequency;
B, add chamfering liquid: according to beveler type, charge etc., change a chamfering liquid every special time, before changing chamfering liquid, first old chamfering liquid is got rid of, and rinse well with clear water, the chamfering liquid required by last supplement art;
C, blanking: close down beveler, take out abrasive material and product after stopping completely;
D, sorting: rinse products of separated and abrasive material with clear water, easy arrisdefect or large gauge product should select product one by one gently with hand, the product that size is less, can, according to its different size, select the sorting frame of different sieve aperture to carry out sorting;
E, circulation: after product selecting is complete, be immersed in product in the Turnover Box of water, carry out product identification, and circulation is to respectively treating that pre-treatment is carried out in plated product rest area.
2. the endoporus grinding and polishing process of a kind of small circle ring Sintered NdFeB magnet according to claim 1, is characterized in that: described chamfering liquid is the aqueous solution of degreasing powder preparation, and water distribution ratio is 1:10-15, and the higher effect of concentration is better.
3. the endoporus grinding and polishing process of a kind of small circle ring Sintered NdFeB magnet according to claim 1 and abrasive material, is characterized in that: the operating frequency of described setting is 30Hz.
4. the endoporus grinding and polishing process of a kind of small circle ring Sintered NdFeB magnet according to claim 1, is characterized in that: described in add chamfering liquid interval time be 4-6 hour.
5. the endoporus grinding and polishing process of a kind of small circle ring Sintered NdFeB magnet according to claim 1, is characterized in that: a described grinding and polishing, chamfer angle technique are always consuming time is 8-16 hour.
6. the abrasive material used in an endoporus grinding and polishing process according to claim 1, it is characterized in that: described abrasive material is the compound abrasive of yellow ground and Brown Alundum stone, single process 15kg neodymium iron boron product, in compound abrasive, yellow ground needs 2-3L, Brown Alundum stone needs 25-30kg, wherein, the bulk density of yellow ground is 1-2g/cm
3, modulus of fineness is 2.0-3.0, and average grain diameter is 0.4-0.6mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510230360.5A CN104875106A (en) | 2015-05-07 | 2015-05-07 | Grinding and polishing process and abrasive for inner bore of small circular ring sintered NdFeB magnet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510230360.5A CN104875106A (en) | 2015-05-07 | 2015-05-07 | Grinding and polishing process and abrasive for inner bore of small circular ring sintered NdFeB magnet |
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| CN104875106A true CN104875106A (en) | 2015-09-02 |
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| CN201510230360.5A Pending CN104875106A (en) | 2015-05-07 | 2015-05-07 | Grinding and polishing process and abrasive for inner bore of small circular ring sintered NdFeB magnet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480426A (en) * | 2019-09-03 | 2019-11-22 | 贵州航天精工制造有限公司 | A kind of polishing method of irregular inner hole |
| CN112760040A (en) * | 2020-12-08 | 2021-05-07 | 杭州电子科技大学 | Magnetic polishing solution suitable for die-casting aluminum alloy material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323251A (en) * | 1998-08-25 | 2001-11-21 | 杰弗里·威廉·麦克内尼 | Method and apparatus for media finishing |
| CN101909821A (en) * | 2008-03-06 | 2010-12-08 | 三菱重工业株式会社 | Shot peening device and oscillator for shot peening |
| CN102389871A (en) * | 2011-10-18 | 2012-03-28 | 安泰科技股份有限公司 | Method for forming aluminum coating on surface of neodymium iron boron magnet |
| CN202716152U (en) * | 2012-07-19 | 2013-02-06 | 常州市武进长虹结晶器有限公司 | Device for polishing outer surface of workpiece |
-
2015
- 2015-05-07 CN CN201510230360.5A patent/CN104875106A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323251A (en) * | 1998-08-25 | 2001-11-21 | 杰弗里·威廉·麦克内尼 | Method and apparatus for media finishing |
| CN101909821A (en) * | 2008-03-06 | 2010-12-08 | 三菱重工业株式会社 | Shot peening device and oscillator for shot peening |
| CN102389871A (en) * | 2011-10-18 | 2012-03-28 | 安泰科技股份有限公司 | Method for forming aluminum coating on surface of neodymium iron boron magnet |
| CN202716152U (en) * | 2012-07-19 | 2013-02-06 | 常州市武进长虹结晶器有限公司 | Device for polishing outer surface of workpiece |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480426A (en) * | 2019-09-03 | 2019-11-22 | 贵州航天精工制造有限公司 | A kind of polishing method of irregular inner hole |
| CN112760040A (en) * | 2020-12-08 | 2021-05-07 | 杭州电子科技大学 | Magnetic polishing solution suitable for die-casting aluminum alloy material and preparation method thereof |
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Application publication date: 20150902 |
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