CN103920879A - Near-net forming process of rare earth magnetic powder particles - Google Patents
Near-net forming process of rare earth magnetic powder particles Download PDFInfo
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- CN103920879A CN103920879A CN201410072717.7A CN201410072717A CN103920879A CN 103920879 A CN103920879 A CN 103920879A CN 201410072717 A CN201410072717 A CN 201410072717A CN 103920879 A CN103920879 A CN 103920879A
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Abstract
The invention discloses a near-net forming process of rare earth magnetic powder particles. The process includes the steps: 1) making the rare earth magnetic powder particles into briquettes in preset shapes by means of orientation briquetting, and sending the briquettes into a closed isolation box; 2) cutting the briquettes in the isolation box in a protective atmosphere to obtain blocks with shrinkage allowance and working allowance reserved; 3) sintering the blocks in vacuum to obtain a raw magnetic material. The near-net forming process of the rare earth magnetic powder particles lowers the difficulty in forming of the rear earth magnetic powder particles, improves processing efficiency, increases utilization rate of the raw material and guarantees final performances of products.
Description
[technical field]
The present invention relates to rare-earth magnetic particle processing technology, be specifically related to a kind of rare-earth magnetic particle near-net-shape processing technology.
[background technology]
Rare earth permanent-magnetic material is a kind of important basic function material, and its Main Function is to provide the magnetic flux of strength of stability, and does not consume the energy, is one of important means of saving the energy, in fields such as machinery, electronics, instrument and medical treatment, is applied widely.Rare earth permanent-magnetic material is used powder metallurgical technique manufacture.When magnetic material powder particulate is compressing, need to carry out high-intensity magnetic field orientation; due to the parallel magnetic flux in the two poles of the earth of alignment magnetic field and magnetic powder material each to magnetic anomaly; be orientated in compressing process; magnetic powder particles can rearrange along the magnetic line of force; compacting shape and the compacting size suitable with orientation forming press specification could obtain high magnetic orientations degree; the performance of the final sintered products of orientations degree direct influence, the oriented moulding link of rare earth permanent-magnetic material restricts the production of its small articles, shaped piece and even final products.In traditional handicraft, generally can only be orientated die mould and make larger square or cylindrical shape, after sintering, carry out again secondary cut processing, because powder sintered material piece hardness is very high and quality is more crisp, be difficult to processing, working (machining) efficiency is very low, in addition because the intrinsic value of rare-earth products is higher, cutter in processing and the loss of leftover pieces clout also account for larger cost proportion, so production cost is always higher.For solving above-mentioned working (machining) efficiency and processing cost problem, in technique, use the mould of different styles to be orientated Profile procoess now, with expectation, obtain the raw material that approach finished form size, change due to mold shape and compacting size, can affect the distribution of alignment magnetic field, and then affect the orientations of magnetic particulate, and have a strong impact on the final performance of sintered products, generally can only produce low trade mark magnetic material raw material.The magnetic material raw material of producing by this way the high trade mark is very difficult, in reality, seldom uses.
[summary of the invention]
For above-mentioned defect, the invention discloses a kind of rare-earth magnetic particle near-net-shape processing technology, reduced the difficulty of rare-earth magnetic grain forming processing, improve working (machining) efficiency and raw-material utilization rate, and guaranteed the final performance of product.
Technical scheme of the present invention is as follows:
A rare-earth magnetic particle near-net-shape processing technology, comprises the following steps:
1), by rare-earth magnetic orientation of particles die mould, make the base substrate of reservation shape and send in the shielded box of sealing;
2) in being full of the sealing shielded box of protective atmosphere, described base substrate is carried out to cutting processing, obtain being reserved with the material piece of allowance for shrinkage and allowance;
3) described material piece is placed in to vacuum sintering, obtains magnetic material raw material.
In rare-earth magnetic particle near-net-shape processing technology disclosed by the invention, magnetic is orientated to the base substrate obtaining after die mould and cuts, because after base substrate orientation die mould, density is not high, quality is softer, cutting is very easy to, and speed is very fast, reduced the difficulty of processing and forming; During stock layout, calculate in advance sintering shrinkage surplus and allowance for finish, can access the sintering raw material that approach very much finished form and size, reduced follow-up accurately machined workload, improved the utilization rate of material simultaneously; Whole process and outside air sealing isolation, avoid material to be oxidized in process, guaranteed the final performance of product.
[accompanying drawing explanation]
Fig. 1 is the process flow diagram of one embodiment of the invention.
[specific embodiment]
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As shown in Figure 1, rare-earth magnetic particle near-net-shape processing technology disclosed by the invention, comprises the following steps:
1), by rare-earth magnetic orientation of particles die mould, make the base substrate of reservation shape and send in the shielded box of sealing;
2) in being full of the sealing shielded box of protective atmosphere, described base substrate is carried out to cutting processing, obtain being reserved with the material piece of allowance for shrinkage and allowance;
3) described material piece is placed in to vacuum sintering, obtains magnetic material raw material.
In rare-earth magnetic particle near-net-shape processing technology disclosed by the invention, magnetic is orientated to the base substrate obtaining after die mould and cuts, because after base substrate orientation die mould, density is not high, quality is softer, cutting is very easy to, and speed is very fast, reduced the difficulty of processing and forming; During stock layout, calculate in advance sintering shrinkage surplus and allowance for finish, can access the sintering raw material that approach very much finished form and size, reduced follow-up accurately machined workload, improved the utilization rate of material simultaneously; Whole process and outside air sealing isolation, avoid material to be oxidized in process, guaranteed the final performance of product;
Further, described step 1) middle rare earth magnetic powder particle is suppressed by orientation forming press, and through isostatic cool pressing, makes the base substrate of reservation shape, obtains the base substrate of predetermined magnetizing direction and reservation shape;
Preferably, described rare-earth magnetic particle is made after the base substrate of reservation shape with sending into shielded box after packaging closures, described in be packaged in shielded box described base substrate carried out removing before cutting processing, avoid base substrate and air contacting surface to produce oxidation;
Preferably, described step 2) described in, base substrate is fixed in the positioning fixture of wire cutting machine, according to preset path, carries out cutting processing, obtains the material piece that is reserved with allowance for shrinkage and allowance;
Preferably, described step 2) the material piece obtaining in is arranged in sintering box, reaches predetermined quantity and is placed on sintering in vacuum, to enhance productivity;
Preferably, the cutting processing of described base substrate has been assisted by CAD/CAM software, before cutting processing, pass through CAD/CAM software optimization stock layout layout, calculate and reserved sintering shrinkage surplus and allowance for finish, by optimal layout layout, stock utilization is maximized, by calculating and reserved sintering shrinkage surplus and allowance for finish make base substrate farthest approach finished form after oversintering, reduce the waste of material in cutting processing and following process;
Preferably; described base substrate carries out blanking and the tailing of cutting processing and delivers to the recycling of orientation die mould place, and the blanking of base substrate cutting processing and tailing are without sintering, and whole process is in protective atmosphere; can directly deliver to orientation die mould place and recycle, improve stock utilization.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection domain of the present invention.
Claims (7)
1. a rare-earth magnetic particle near-net-shape processing technology, is characterized in that, comprises the following steps:
1), by rare-earth magnetic orientation of particles die mould, make the base substrate of reservation shape and send in the shielded box of sealing;
2) in being full of the sealing shielded box of protective atmosphere, described base substrate is carried out to cutting processing, obtain being reserved with the material piece of allowance for shrinkage and allowance;
3) described material piece is placed in to vacuum sintering, obtains magnetic material raw material.
2. rare-earth magnetic particle near-net-shape processing technology as claimed in claim 1, is characterized in that: described step 1) middle rare earth magnetic powder particle is suppressed by orientation forming press, and through isostatic cool pressing, makes the base substrate of reservation shape.
3. rare-earth magnetic particle near-net-shape processing technology as claimed in claim 1 or 2, it is characterized in that: described rare-earth magnetic particle is made after the base substrate of reservation shape with sending into shielded box after packaging closures, described in be packaged in shielded box described base substrate carried out removing before cutting processing.
4. the metallurgical near-net-shape processing technology of native powder of permanent-magnet material as claimed in claim 1, it is characterized in that: base substrate described step 2) is fixed in the positioning fixture of wire cutting machine, according to preset path, carry out cutting processing, obtain the material piece that is reserved with allowance for shrinkage and allowance.
5. the metallurgical near-net-shape processing technology of the native powder of permanent-magnet material as described in claim 1 or 4, is characterized in that: the material piece obtaining described step 2) is arranged in sintering box, reaches predetermined quantity and is placed on sintering in vacuum.
6. rare-earth magnetic particle near-net-shape processing technology as claimed in claim 1, it is characterized in that: the cutting processing of described base substrate has been assisted by CAD/CAM software, before cutting processing, by CAD/CAM software optimization stock layout layout, calculate and reserved sintering shrinkage surplus and allowance for finish.
7. rare-earth magnetic particle near-net-shape processing technology as claimed in claim 1, is characterized in that: described base substrate carries out blanking and the tailing of cutting processing and delivers to the recycling of orientation die mould place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410072717.7A CN103920879A (en) | 2014-02-28 | 2014-02-28 | Near-net forming process of rare earth magnetic powder particles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410072717.7A CN103920879A (en) | 2014-02-28 | 2014-02-28 | Near-net forming process of rare earth magnetic powder particles |
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| CN103920879A true CN103920879A (en) | 2014-07-16 |
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| CN201410072717.7A Pending CN103920879A (en) | 2014-02-28 | 2014-02-28 | Near-net forming process of rare earth magnetic powder particles |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889406A (en) * | 2015-06-28 | 2015-09-09 | 浙江康盈磁业有限公司 | Production device for rare-earth permanent magnet material |
| 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 |
| CN105478772A (en) * | 2014-09-15 | 2016-04-13 | 安泰科技股份有限公司 | Manufacturing method of molybdenum flat target material |
| CN105598446A (en) * | 2015-12-02 | 2016-05-25 | 董开 | Flexible forming method and device for rare earth permanent magnet material |
| CN109273236A (en) * | 2018-09-29 | 2019-01-25 | 飞磁电子材料(东莞)有限公司 | A kind of manufacturing method of quick FERRITE CORE sample |
| CN109285686A (en) * | 2018-08-22 | 2019-01-29 | 横店集团东磁股份有限公司 | A kind of cutting core production method |
| EP3627525A1 (en) * | 2018-08-16 | 2020-03-25 | Yantai Shougang Magnetic Materials Inc. | A method for improving performance of sintered ndfeb magnet and a special device thereof |
| CN114653939A (en) * | 2022-03-01 | 2022-06-24 | 山东汇嘉磁电科技有限公司 | Production and processing method of U-shaped magnetic powder core |
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| JPS55122804A (en) * | 1979-03-15 | 1980-09-20 | Toshiba Corp | Production of sintered part |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105478772A (en) * | 2014-09-15 | 2016-04-13 | 安泰科技股份有限公司 | Manufacturing method of molybdenum flat target material |
| CN105478772B (en) * | 2014-09-15 | 2018-12-04 | 安泰科技股份有限公司 | A kind of manufacturing method of molybdenum planar targets |
| CN104889406A (en) * | 2015-06-28 | 2015-09-09 | 浙江康盈磁业有限公司 | Production device for rare-earth permanent magnet material |
| 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 |
| CN105598446A (en) * | 2015-12-02 | 2016-05-25 | 董开 | Flexible forming method and device for rare earth permanent magnet material |
| EP3627525A1 (en) * | 2018-08-16 | 2020-03-25 | Yantai Shougang Magnetic Materials Inc. | A method for improving performance of sintered ndfeb magnet and a special device thereof |
| CN109285686A (en) * | 2018-08-22 | 2019-01-29 | 横店集团东磁股份有限公司 | A kind of cutting core production method |
| CN109285686B (en) * | 2018-08-22 | 2021-01-19 | 横店集团东磁股份有限公司 | Production method for cutting magnetic core |
| CN109273236A (en) * | 2018-09-29 | 2019-01-25 | 飞磁电子材料(东莞)有限公司 | A kind of manufacturing method of quick FERRITE CORE sample |
| CN114653939A (en) * | 2022-03-01 | 2022-06-24 | 山东汇嘉磁电科技有限公司 | Production and processing method of U-shaped magnetic powder core |
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Application publication date: 20140716 |
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