CN110379614A - A kind of processing technology of magnetic patch - Google Patents
A kind of processing technology of magnetic patch Download PDFInfo
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- CN110379614A CN110379614A CN201910564488.3A CN201910564488A CN110379614A CN 110379614 A CN110379614 A CN 110379614A CN 201910564488 A CN201910564488 A CN 201910564488A CN 110379614 A CN110379614 A CN 110379614A
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- magnetic patch
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- 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
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- 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
- H01F41/0266—Moulding; Pressing
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention discloses a kind of processing technologys of magnetic patch, are related to magnetic material manufacture field, mainly include the following steps: Step 1: raw material is carried out impeller blasting；Step 2: raw material is melted, carries out getting rid of tape handling later, obtain rejection tablet mixing；Step 3: hydrogen tear is managed；Step 4: airflow milling operates powder processed；Step 5: powder pressing formation is obtained blank；Step 6: static pressure is waited to operate, wire cutting is carried out later, and receive leftover pieces；Step 7: carrying out high temperature sintering after to the end of wire cutting to blank and obtaining semi-finished product；Step 8: obtaining finished product magnetic patch after semi-finished product are carried out mill processing.By using above-mentioned technical proposal cutting efficiency can either be improved in this way, and can reduce the loss of equipment and the energy by wire cutting as between equal static pressure and sintering step.
Description
Technical field
The present invention relates to magnetic material manufacture field, in particular to a kind of processing technology of magnetic patch.
Background technique
With the constantly promotion of social production level, magnetic material institute application field also becomes increasingly wider.Wherein, neodymium
Iron boron is relatively popular a kind of magnetic material on the market now, is by neodymium, iron, boron (Nd2Fe14B) the tetragonal formed
It is crystal.In nineteen eighty-two, the assistant river true man of Sumitomo Special Metals have found neodium magnet.The magnetic energy product (BHmax) of this magnet is greater than
Samarium cobalt magnet is the maximum substance of whole world magnetic energy product at that time.Later, Sumitomo Special Metals successful development powder metallurgic method is led to
With motor corporation's successful development whirl spraying smelting process, ndfeb magnet can be prepared.
This magnet is the permanent magnet for being only second to absolute zero holmium magnet magnetic now and most-often used Rare-Earth Magnetic
Iron.Ndfeb magnet is widely used in electronic product, such as hard disk, mobile phone, earphone and battery-powered tool etc..
Meanwhile in the prior art in the production process of neodymium iron boron, it is common that by cutting step be placed on the last one link into
Row operation.And the step of sintering is had gone through due to neodymium iron boron at this time, so that integral hardness is relatively high.So on the one hand
It is easy that cutting equipment is caused to wear in cutting process, the leftover pieces on the other hand generated can not carry out efficiently reuse.
Summary of the invention
The object of the present invention is to provide a kind of processing technologys of magnetic patch, can not only reduce the mill of equipment in cutting process
Energy consumption is undermined, meanwhile, the leftover pieces cut down also can be utilized efficiently.
Foregoing invention purpose of the invention has the technical scheme that a kind of processing technology of magnetic patch,
Include the following steps:
Step 1: the raw material for having prepared completion is carried out impeller blasting；
Step 2: the raw material that cleaning is completed is melted, the raw material of melting is carried out getting rid of tape handling later, to obtain rejection tablet
Mixing；
Step 3: the rejection tablet mixing that step 2 is obtained carries out hydrogen tear reason；
Step 4: raw material is carried out airflow milling and operates powder processed after the completion of hydrogen is broken；
Pressing formation is carried out Step 5: powder made from step 4 is added in mold, obtains blank；
Step 6: blank is carried out equal static pressure operation, wire cutting is carried out further according to the shape for needing to produce later, and receive corner
Material；
Step 7: carrying out high temperature sintering after to the end of wire cutting to blank and obtaining semi-finished product；
Step 8: obtaining finished product magnetic patch after semi-finished product are carried out mill processing.
By using above-mentioned technical proposal, the step of wire cutting, is placed between equal static pressure and sintering, caused in this way
Energy consumption and the degree of equipment loss will be in much lower after sintering step than wire cutting.
This is because the green density after waiting static pressure is less than 4kg/m3, and the density of sintered semi-finished product is most
Greater than 7.6kg/m3.Thus, the hardness of blank wants low for semi-finished product.Although secondly, phase between the raw material of blank inside
Mutual adhesive attraction, but there has been no chemical reaction in itself, thus globality is poor, and change has been completed inside semi-finished product
Reaction is learned, globality is preferable.Thus, more more convenient than wire cutting semi-finished product when cutting on line blank.
Meanwhile if carrying out wire cutting again after sintering, since semi-finished product hardness is high and frangible, thus that leftover pieces generate
Grain is larger, and the phenomenon that semi-finished product corner is snapped even easily occurs.So last yield rate is relatively low.And wire cutting is located at
Between equal static pressure and sintering, then last yield rate is also higher.
Preferably, the wire cutting of step 6 can be single line cutting or multi-wire saw.
Preferably, the speed of wire cutting is 10000~20000mm2/h。
By using above-mentioned technical proposal, if carrying out wire cutting to semi-finished product, speed can typically up to be reached
3000mm2/h.This is because being more than this speed, the corner after semi-finished product cutting is easy to produce apparent burr, seriously affects
To the quality of product.Meanwhile damage is also be easy to cause for linear cutting equipment.
And when carrying out wire cutting to blank, speed control is in 10000~20000mm2/ h not only ensure that magnetic patch is higher
Production efficiency, meanwhile, also without generating apparent burr and causing the damage of linear cutting equipment.
Preferably, during wire cutting, blank is in nitrogen atmosphere.
By using above-mentioned technical proposal, during wire cutting, blank be easy thus frictional heat generation and increase problem.
And nitrogen can protect blank, and blank is avoided to be contacted with the oxygen in air, and in the case where higher problem
Oxidation reaction occurs, and influences final product quality.
Preferably, in step 7, before sintering, blank is coated first with asbestos.
By using above-mentioned technical proposal, under the package of asbestos, magnetic patch can be effectively improved and during the sintering process can
It is enough heated evenly, to be conducive to improve the quality of product.
Preferably, muti-piece blank progress plate is uniformly put, asbestos is recycled to coat muti-piece blank simultaneously later
Come.
By using above-mentioned technical proposal, muti-piece blank is subjected to unified cladding, on the one hand can either guarantee sintering uniformly,
On the other hand the dosage of the material of asbestos can also be reduced.
Preferably, the leftover pieces collected in step 6 are used alone or are used in mixed way with virgin material.
By using above-mentioned technical proposal, be conducive to the utilization efficiency for improving leftover pieces in this way.
Preferably, leftover pieces and virgin material are with mass ratio for 1: (3~5) are mixed in step 4.
Through the above technical solutions, raw material after being matched with aforementioned proportion and the original being all formulated by virgin material
Material is compared, and the heat treatment of the magnetic patch manufactured is smaller.
Preferably, leftover pieces exclusive use need to be according to the operation of step 4 to step 8.
By using above-mentioned technical proposal, leftover pieces are used alone and only need be crushed with airflow milling, thus
Improve the efficiency for reusing leftover pieces.
In conclusion advantageous effects of the invention are as follows:
1, by wire cutting as etc. between static pressure and sintering step, cutting efficiency can either be improved in this way, and equipment can be reduced
With the loss of the energy；
2, leftover pieces and virgin material are used in mixed way, can be improved the service efficiency of leftover pieces in this way, while producing
The similar performance of magnetic patch and conventional magnetic patch；
3, pass through nitrogen during wire cutting to be protected, can be avoided what blank was oxidized in this way, and then ensure that magnetic patch
Quality.
Detailed description of the invention
Fig. 1 is a kind of processing process figure of magnetic patch.
Specific embodiment
Below in conjunction with attached drawing 1, the present invention is described in more detail.
Embodiment one,
A kind of processing technology of magnetic patch, includes the following steps:
Step 1: the raw material for having prepared completion is added in shot-blasting machine, impeller blasting is carried out；
It is melted completely Step 2: the raw material that cleaning is completed is put into smelting furnace, melt is transferred to gets rid of band machine later
In carry out getting rid of tape handling, to obtain rejection tablet mixing；
Step 3: the rejection tablet mixing that step 2 obtains is added to progress hydrogen tear reason in hydrogen broken furnace, the broken material of hydrogen is obtained；
Powder processed is operated Step 4: the broken material of hydrogen is then transferred in airflow mill and carries out airflow milling, the average particle size of powder is less than
5um；
Pressing formation is carried out Step 5: powder made from step 4 is added in mold, obtains blank；
Step 6: blank is carried out equal static pressure operation, later under the protection of nitrogen atmosphere, with speed in the way of multi-wire saw
Degree is 10000mm2/ h cuts blank, and collects leftover pieces；
Step 7: after laying flat the blank of muti-piece well cutting, got up with the unified cladding of asbestos after to the end of wire cutting,
And be put into sintering furnace, and 1000~1100 DEG C, and heat preservation sintering 6 hours are warming up to 50 DEG C/min speed, to obtain half
Finished product；Step 8: obtaining finished product ndfeb magnet after semi-finished product are carried out mill processing.
Wherein, it is 99.35% that raw material, which is prepared by the weight percentage of major ingredient, and the weight percentage 0.4% of auxiliary material adds
The weight percentage for adding object is 0.25% progress.
Also, major ingredient is made of B, Fe and PrNd, is 33.2% in weight percentage of this PrNd in major ingredient, major ingredient
In B weight percentage be 1%, surplus Fe, auxiliary material is made of Al, Co, and the weight percentage of the Al in auxiliary material is
The weight percentage of 1%, the Co in auxiliary material are 99%, and additive is made of Nb and Zr, the weight percent of the Nb in additive
Content is 80%, and the weight percentage of the Zr in additive is 20%.
Comparative example one,
The difference of itself and embodiment one is only that cutting step is located at after sintering, meanwhile, the speed of cutting is 3000mm2/ h,
To obtain finished product ndfeb magnet.
Comparative example two,
The difference of itself and embodiment one is only that cutting step is located at after sintering, meanwhile, the speed of cutting is 10000mm2/
H, to obtain finished product ndfeb magnet.
Embodiment two,
A kind of processing technology of magnetic patch, includes the following steps:
Step 1: the raw material for having prepared completion is added in shot-blasting machine, impeller blasting is carried out；
It is melted completely Step 2: the raw material that cleaning is completed is put into smelting furnace, melt is transferred to gets rid of band machine later
In carry out getting rid of tape handling, to obtain rejection tablet mixing；
Step 3: the rejection tablet mixing that step 2 obtains is added to progress hydrogen tear reason in hydrogen broken furnace, the broken material of hydrogen is obtained；
Step 4: the broken material of hydrogen and leftover pieces are mixed with mass ratio for 1: 3, it is then transferred to progress airflow milling operation in airflow mill
The average particle size of powder processed, powder is less than 5um；
Pressing formation is carried out Step 5: powder made from step 4 is added in mold, obtains blank；
Step 6: blank is carried out equal static pressure operation, later under the protection of nitrogen atmosphere, with speed in the way of multi-wire saw
Degree is 20000mm2/ h cuts blank, and collects leftover pieces；
Step 7: after laying flat the blank of muti-piece well cutting, got up with the unified cladding of asbestos after to the end of wire cutting,
And be put into sintering furnace, and 1000~1100 DEG C, and heat preservation sintering 6 hours are warming up to 50 DEG C/min speed, to obtain half
Finished product；Step 9: obtaining finished product ndfeb magnet after semi-finished product are carried out mill processing.
Wherein, raw material, which is prepared, presses major ingredient, auxiliary material and additive, and the weight percentage of major ingredient is 98.90%, the weight of auxiliary material
Percentage composition 0.75% is measured, the weight percentage of additive is 0.35%.
Also, major ingredient is made of B, Fe and PrNd, and wherein weight percentage of the PrNd in major ingredient is 31.14%, main
The weight percentage of B in material is 0.98%, and surplus Fe, auxiliary material is made of Al, Co, Cu, the weight hundred of the Al in auxiliary material
Dividing content is 13.33%, and the weight percentage of the Co in auxiliary material is 66.67%, and the weight percentage of the Cu in auxiliary material is
20%, additive is made of Ga and Zr, and the weight percentage of the Ga in additive is 57.1%, the weight of the Zr in additive
Percentage composition is 42.9%.
Embodiment three,
A kind of processing technology of magnetic patch, the difference with embodiment two are only that the broken material of hydrogen and leftover pieces are mixed for 1: 4 with mass ratio
It closes, and cutting speed is 15000mm2/h。
Example IV,
A kind of processing technology of magnetic patch, the difference with embodiment two are only that the broken material of hydrogen and leftover pieces are mixed for 1: 5 with mass ratio
It closes.
Comparative example three,
The difference of itself and embodiment two is that cutting step is located at after sintering, meanwhile, the speed of cutting is 3000mm2/ h, and
Leftover pieces are not incorporated into, to obtain finished product ndfeb magnet.
Comparative example four,
The difference of itself and embodiment two is that cutting step is located at after sintering, meanwhile, the speed of cutting is 3000mm2/ h, from
And obtain finished product ndfeb magnet.
Embodiment five,
A kind of processing technology of magnetic patch, includes the following steps,
Powder processed, the average grain of powder are operated Step 1: the leftover pieces of embodiment two are transferred in airflow mill and carry out airflow milling
Degree is less than 5um；
Pressing formation is carried out Step 2: powder made from step 1 is added in mold, obtains blank；
Step 3: blank is carried out equal static pressure operation, later under the protection of nitrogen atmosphere, with speed in the way of single line cutting
Degree is 20000mm2/ h cuts blank, and collects leftover pieces；
Step 4: after laying flat the blank of muti-piece well cutting, got up with the unified cladding of asbestos after to the end of wire cutting,
And be put into sintering furnace, and 1000~1100 DEG C, and heat preservation sintering 6 hours are warming up to 50 DEG C/min speed, to obtain half
Finished product；Step 5: obtaining finished product ndfeb magnet after semi-finished product are carried out mill processing.
Using magnetic property automatic measuring instrument AMT-4 (production of Mianyang, Sichuan bipolar electrolytic Co., Ltd), by GB/T 3217
Regulation test method after being heated to 60 DEG C and keeping the temperature 30s, detected, obtain the result as shown in following table one:
One embodiment one of table to embodiment five and comparative example one magnetic patch into comparative example four magnetic result
It can be seen that the application from the comparison of embodiment one and comparative example one and comparative example two in upper table one to effectively improve
The integrity degree of processing efficiency and magnetic patch is higher, meanwhile, the performance parameter of magnetic patch does not also change substantially.Secondly, according to embodiment
Two, embodiment three and example IV and comparative example three and comparative example four compare as can be seen that the application is by by leftover pieces
It is used in mixed way with virgin material, there is no increasing failure for the performance of the finished product magnetic patch produced.Furthermore embodiment five and right
Ratio three compares as can be seen that the application directly uses leftover pieces production its magnetic behavior failure of magnetic patch relatively low.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (9)
1. a kind of processing technology of magnetic patch, includes the following steps:
Step 1: the raw material for having prepared completion is carried out impeller blasting；
Step 2: the raw material that cleaning is completed is melted, the raw material of melting is carried out getting rid of tape handling later, to obtain rejection tablet
Mixing；
Step 3: the rejection tablet mixing that step 2 is obtained carries out hydrogen tear reason；
Step 4: raw material is carried out airflow milling and operates powder processed after the completion of hydrogen is broken；
Pressing formation is carried out Step 5: powder made from step 4 is added in mold, obtains blank；
Step 6: blank is carried out equal static pressure operation, wire cutting is carried out further according to the shape for needing to produce later, and receive corner
Material；
Step 7: carrying out high temperature sintering after to the end of wire cutting to blank and obtaining semi-finished product；
Step 8: obtaining finished product magnetic patch after semi-finished product are carried out mill processing.
2. a kind of processing technology of magnetic patch according to claim 1, it is characterised in that: the wire cutting of step 6 can be single
Wire cutting or multi-wire saw.
3. a kind of processing technology of magnetic patch according to claim 1 or 2, it is characterised in that: the speed of wire cutting is 10000
~20000mm2/h。
4. a kind of processing technology of magnetic patch according to claim 3, it is characterised in that: during wire cutting, at blank
In nitrogen atmosphere.
5. a kind of processing technology of magnetic patch according to claim 1, it is characterised in that: before sintering, first sharp in step 7
Blank is coated with asbestos.
6. a kind of processing technology of magnetic patch according to claim 5, it is characterised in that: it is uniform that muti-piece blank is carried out plate
It puts, asbestos is recycled to coat simultaneously by muti-piece blank later.
7. a kind of processing technology of magnetic patch according to claim 1, it is characterised in that: the corner material list collected in step 6
It solely uses or is used in mixed way with virgin material.
8. a kind of processing technology of magnetic patch according to claim 7, it is characterised in that: leftover pieces and virgin material are with mass ratio
1: (3~5) are mixed in step 4.
9. a kind of processing technology of magnetic patch according to claim 7, it is characterised in that: leftover pieces exclusive use need to be according to step
Rapid four to step 8 operation.
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| CN201910564488.3A CN110379614A (en) | 2019-06-26 | 2019-06-26 | A kind of processing technology of magnetic patch |
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| CN201910564488.3A CN110379614A (en) | 2019-06-26 | 2019-06-26 | A kind of processing technology of magnetic patch |
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| CN104576021A (en) * | 2014-11-26 | 2015-04-29 | 宁波宏垒磁业有限公司 | NdFeB magnet sintering method |
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2019
- 2019-06-26 CN CN201910564488.3A patent/CN110379614A/en active Pending
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| JP2015032669A (en) * | 2013-08-01 | 2015-02-16 | 日産自動車株式会社 | Method for producing sintered magnet |
| CN104576021A (en) * | 2014-11-26 | 2015-04-29 | 宁波宏垒磁业有限公司 | NdFeB magnet sintering method |
| CN104907558A (en) * | 2015-06-28 | 2015-09-16 | 浙江康盈磁业有限公司 | A rare earth permanent magnetic material preparing method |
| CN107475631A (en) * | 2017-05-24 | 2017-12-15 | 安徽省瀚海新材料股份有限公司 | A kind of sintered NdFeB pressed compact processing method |
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