CN104107909B - The forming method of hollow cylinder rare earth magnetic steel pressed compact - Google Patents

The forming method of hollow cylinder rare earth magnetic steel pressed compact Download PDF

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Publication number
CN104107909B
CN104107909B CN201410346968.XA CN201410346968A CN104107909B CN 104107909 B CN104107909 B CN 104107909B CN 201410346968 A CN201410346968 A CN 201410346968A CN 104107909 B CN104107909 B CN 104107909B
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pressed compact
rare earth
punch
hollow cylinder
magnetic steel
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CN104107909A (en
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王连生
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Sino Magnetics Technology Co Ltd
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Sino Magnetics Technology Co Ltd
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Abstract

The forming method that the invention discloses a kind of hollow cylinder rare earth magnetic steel pressed compact, comprises the steps: to provide mould, and mould comprises magnetic conductive board, clamping plate, support, multiple core, and mould is formed with upper cavity; Powder is packed in upper cavity; Upper punch is packed in upper cavity and suppressed, thereby form first half pressed compact; Turnover mould, makes upper punch down, takes out support, and then forms lower mode cavity; Powder is packed in lower mode cavity; Bottom punch is packed in lower mode cavity and suppressed, thereby form Lower Half pressed compact; Dismounting magnetic conductive board, clamping plate, upper punch and bottom punch, wait static pressure; After waiting static pressure, take out the multiple cores between first half pressed compact and Lower Half pressed compact, thereby form multiple hollow cylinder rare earth magnetic steel pressed compacts. Method inventory of the present invention is few, production efficiency is high, cost is low; Straight forming hollow cylinder rare earth magnetic steel pressed compact. Solve the technical barrier that existing method inventory is large, production efficiency is low, cost is high.

Description

The forming method of hollow cylinder rare earth magnetic steel pressed compact
Technical field
The present invention relates to neodymium iron boron manufacture field, particularly a kind of hollow cylinder Nd-Fe-B magnet steel pressed compactForming method.
Background technology
At present, the method for known production sintered NdFeB hollow cylinder rare earth magnetic steel is first according to order chiVery little and mill allowance determines blank dimension, designs, has manufactured mould, then according to known shrinkage ratioPack powder into die cavity, by compacting, etc. static pressure, fire rear formation cylinder blank, then pass through machinedCylindrical grinding, draw hole, form hollow cylinder rare earth magnetic steel finished product. The problem that the method exists: inventory is large,Production efficiency is low, and cost is high.
The information that is disclosed in this background technology part is only intended to increase the reason to general background of the present inventionSeparate, and should not be regarded as admitting or imply that in any form this information structure has been this area general technologyThe prior art that personnel are known.
Summary of the invention
The object of the present invention is to provide a kind of method of straight forming hollow cylinder Nd-Fe-B magnet steel pressed compact,To solve the technical barrier that existing method inventory is large, production efficiency is low, cost is high.
For achieving the above object, the invention provides a kind of forming method of hollow cylinder rare earth magnetic steel pressed compact,Comprise the steps: that a. provides mould, mould comprises magnetic conductive board, clamping plate, support, multiple core, mouldTool is formed with upper cavity; B. powder is packed in upper cavity; C. upper punch is packed in upper cavity and pressedSystem, thus first half pressed compact formed; D. turnover mould, makes upper punch down, takes out support, and then shapeBecome lower mode cavity; E. powder is packed in lower mode cavity; F. bottom punch is packed in lower mode cavity and suppressed, fromAnd formation Lower Half pressed compact; G. dismantle magnetic conductive board, clamping plate, upper punch and bottom punch, wait static pressure;H. after waiting static pressure, take out the multiple cores between first half pressed compact and Lower Half pressed compact, thus shapeBecome multiple hollow cylinder rare earth magnetic steel pressed compacts.
Preferably, in technique scheme, on support, offer the semicircle identical with the radius of multiple coresOpening, in the time carrying out above-mentioned steps a, multiple cores are positioned in the semicircular opening of support.
Preferably, in technique scheme, powder is neodymium iron boron powder.
Compared with prior art, the present invention has following beneficial effect:
Of the present invention method is simple, and inventory is few, production efficiency is high, cost is low; Straight forming skyHeart cylinder rare earth magnetic steel pressed compact. Solve the skill that existing method inventory is large, production efficiency is low, cost is highAn art difficult problem.
Brief description of the drawings
Fig. 1 is the forming method first half pressed compact schematic diagram of hollow cylinder rare earth magnetic steel pressed compact of the present invention.
Fig. 2 is the forming method Lower Half pressed compact schematic diagram of hollow cylinder rare earth magnetic steel pressed compact of the present invention.
Fig. 3 is the forming method first half pressed compact axonometric drawing of hollow cylinder rare earth magnetic steel pressed compact of the present invention.
Fig. 4 is the forming method Lower Half pressed compact axonometric drawing of hollow cylinder rare earth magnetic steel pressed compact of the present invention.
Main description of reference numerals:
1-support, 2-core, 3-upper punch, 4-first half pressed compact, 5-clamping plate, 6-magnetic conductive board, 7-bottom punch,8-Lower Half pressed compact.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that thisThe protection domain of invention is not subject to the restriction of detailed description of the invention.
Unless separately there is other clearly to represent, otherwise in whole description and claims, term " bagDraw together " or its conversion element of stating being understood to include as " comprising " or " including " etc. orPart, and do not get rid of other element or other part.
As shown in Figures 1 to 4, according to the hollow cylinder rare earth magnetic steel pressed compact of the specific embodiment of the inventionForming method, comprise the steps:
A. provide the mould being formed by magnetic conductive board 6, clamping plate 5, support 1, multiple core 2, this mould toolThere is upper cavity. Both sides before and after two magnetic conductive boards 6 are arranged at respectively, the left and right sides of magnetic conductive board 6 is tool respectivelyThere is protuberance. Two clamping plates 5 is arranged at respectively the left and right sides, is connected to the protuberance of magnetic conductive board 6 in the while.On support 1, offer the multiple semicircular openings corresponding with multiple cores 2, the radius of above-mentioned semicircular opening withThe radius of core 2 is identical, so that core 2 and support 1 can be combined closely. Support is put in to magnetic conductive board 6The bottom of the rectangular structure surrounding with clamping plate 5, finally puts into core 2 semicircular opening of support 1,The space on core 2 and support 1 top is upper cavity. The multiple cores 2 of above-mentioned once use have ensuredOnce can the multiple hollow cylinder rare earth magnetic steel of moulding pressed compact, in actual production, improve production efficiency.
B. powder is packed in upper cavity. In practical operation, those skilled in the art can press according to the first halfInternal diameter, external diameter and the length gauge of base 4 calculates the volume of each root hollow cylinder rare earth magnetic steel pressed compact, simultaneouslyAccording to the density of powder, calculate the use amount of powder, thereby can save to the full extent powderUse amount. In production, overcome the large problem of inventory, also saved production cost simultaneously. Above-mentioned powderBe preferably neodymium iron boron powder.
C. upper punch 3 is packed in upper cavity and suppressed, this is compressed to once compacting, once after compactingForm first half pressed compact 4. On upper punch 3, offer the multiple semicircular openings corresponding with multiple cores 2, shouldThe radius of semicircular opening is the external diameter of hollow cylinder rare earth magnetic steel pressed compact, and the radius of core 2 is hollowThe internal diameter of cylinder rare earth magnetic steel pressed compact.
D. above-mentioned mould and the patrix being made up of magnetic conductive board 6, clamping plate 5, support 1, multiple core 2 overturnsPunching 3, thus make upper punch 3 down, take out support 1, the position that support 1 is vacated is lower mode cavity.
E. powder is packed in lower mode cavity. Concrete grammar, with step b, therefore no longer describes in detail here.
F. bottom punch 7 is packed in lower mode cavity and suppressed, this is compressed to secondary compacting, after secondary compactingForm Lower Half pressed compact 8. Bottom punch 7 is just the same with structure and the quality of upper punch 3, thereby ensuresThe uniformity consistency of pressure when compacting, and then ensure hollow cylinder rare earth magnetic steel green density after mouldingUniformity.
G. dismantle magnetic conductive board 6, clamping plate 5, bottom punch 7 and upper punch 3, in the several steps through above-mentionedAfter, although first half pressed compact 4 and Lower Half pressed compact 8 forms the pressed compact of hollow cylinder rare earth magnetic steels, so itsForm and structure are not still very stable, need further to wait static pressure.
H. wait after static pressure, take out and be positioned at the core 2 that is clipped in first half pressed compact 4 and Lower Half pressed compact 8, extremelyThis forms hollow cylinder rare earth magnetic steel pressed compact.
In sum, the forming method of hollow cylinder rare earth magnetic steel pressed compact of the present invention, it is easy and simple to handle easilyOK, inventory is few, production efficiency is high, cost is low; Ensure straight forming hollow cylinder rare earth magnetic steel pressureBase.
The aforementioned description to concrete exemplary of the present invention is in order to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentionedInstruction, can much change and change. Exemplary embodiment is selected and the object described existsIn explaining certain principles of the present invention and practical application thereof, thereby make those skilled in the art can be realNow and utilize various exemplary of the present invention and various selection and change.Scope of the present invention is intended to be limited by claims and equivalents thereof.

Claims (3)

1. a forming method for hollow cylinder rare earth magnetic steel pressed compact, is characterized in that, described forming methodComprise the steps:
A., mould is provided, and described mould comprises magnetic conductive board, clamping plate, support, multiple core, described mouldBe formed with upper cavity;
B. powder is packed in described upper cavity;
C. upper punch is packed in described upper cavity and suppressed, thereby form first half pressed compact;
D. the described mould that overturns, makes described upper punch down, takes out described support, and then forms lower mode cavity;
E. described powder is packed in described lower mode cavity;
F. bottom punch is packed in described lower mode cavity and suppressed, thereby form Lower Half pressed compact;
G. dismantle described magnetic conductive board, described clamping plate, described upper punch and described bottom punch, wait static pressure;
H. through waiting after static pressure, take out between described first half pressed compact and described Lower Half pressed compact described inMultiple cores, thus multiple described hollow cylinder rare earth magnetic steel pressed compacts formed.
2. the forming method of hollow cylinder rare earth magnetic steel pressed compact as claimed in claim 1, is characterized in that,On described support, offer the semicircular opening identical with the radius of described multiple cores, when carrying out above-mentioned steps aTime, described multiple cores are positioned in the described semicircular opening of described support.
3. the forming method of hollow cylinder rare earth magnetic steel pressed compact as claimed in claim 1, is characterized in that,Described powder is neodymium iron boron powder.
CN201410346968.XA 2014-07-21 2014-07-21 The forming method of hollow cylinder rare earth magnetic steel pressed compact Active CN104107909B (en)

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CN104107909B true CN104107909B (en) 2016-05-25

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107309424A (en) * 2017-07-03 2017-11-03 生伦磁业有限公司 A kind of hollow magnet processing mold and hollow magnet processing technology

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1317384A (en) * 2000-03-28 2001-10-17 住友特殊金属株式会社 Powder pressing appts. and method for producing rere earch alloyed magnetic powder formed body
JP2007235017A (en) * 2006-03-03 2007-09-13 Matsushita Electric Ind Co Ltd Sheet-shaped rare earth bond magnet, its manufacturing method, and motor using it
JP2007254813A (en) * 2006-03-23 2007-10-04 Tdk Corp Method for producing rare earth sintered magnet and die for molding used therefor
CN201089013Y (en) * 2007-09-28 2008-07-23 宁波市聚友磁业有限公司 Special mould for implementing forming method of columniform permanent magnetic material having longitudinal through-hole
CN203356590U (en) * 2013-06-26 2013-12-25 北京盛磁科技有限公司 Pressing die for neodymium iron boron material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1317384A (en) * 2000-03-28 2001-10-17 住友特殊金属株式会社 Powder pressing appts. and method for producing rere earch alloyed magnetic powder formed body
JP2007235017A (en) * 2006-03-03 2007-09-13 Matsushita Electric Ind Co Ltd Sheet-shaped rare earth bond magnet, its manufacturing method, and motor using it
JP2007254813A (en) * 2006-03-23 2007-10-04 Tdk Corp Method for producing rare earth sintered magnet and die for molding used therefor
CN201089013Y (en) * 2007-09-28 2008-07-23 宁波市聚友磁业有限公司 Special mould for implementing forming method of columniform permanent magnetic material having longitudinal through-hole
CN203356590U (en) * 2013-06-26 2013-12-25 北京盛磁科技有限公司 Pressing die for neodymium iron boron material

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