CN203437641U - Orientation pressing device of radiation ring with large height-diameter ratio - Google Patents
Orientation pressing device of radiation ring with large height-diameter ratio Download PDFInfo
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- CN203437641U CN203437641U CN201320537872.2U CN201320537872U CN203437641U CN 203437641 U CN203437641 U CN 203437641U CN 201320537872 U CN201320537872 U CN 201320537872U CN 203437641 U CN203437641 U CN 203437641U
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- core iron
- radiation ring
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Abstract
The utility model discloses an orientation pressing device of a radiation ring with a large height-diameter ratio. The orientation pressing device is arranged on a support of a pressing machine, and an upper pressing head, a lower pressing head, the support and a controller are arranged on the pressing machine. The orientation pressing device is characterized in that a cushion block is arranged on the lower surface of the upper pressing head, and a tubular upper punch is arranged on the lower surface of the cushion block. A first cylindrical cavity is arranged in the cushion block, and upper core iron is arranged in the upper punch, wherein the upper end of the upper core iron is arranged in the first cylindrical cavity, and the upper core iron can vertically move relative to the upper punch. A tubular lower punch used for penetrating into a second cylindrical cavity is arranged on the upper surface of the lower pressing head, lower core iron is arranged in the lower punch, and the lower core iron is exposed out of the upper end of the lower punch. The controller is electrically and respectively connected with the pressing machine and a magnet exciting coil. The orientation pressing device has the advantages of being suitable for manufacturing the radiation ring with the large height-diameter ratio, low in transformation investment and wide in application range.
Description
Technical field
The utility model relates to permanent-magnet material and makes field, especially relates to a kind of for making the orientation pressure setting of larger ratio of height to diameter radiation ring of the radiation ring of larger ratio of height to diameter.
Background technology
The advantages such as sintered NdFeB radiation ring product is mainly used in high-grade rare-earth permanent-magnet electric machine field, has and is convenient to assembling, and electric machine rotation is steady, noise is little, market prospects are good.The main bugbear of production radiation ring is how to obtain the high and uniform radially oriented magnetic field of magnetic field intensity.Current radial oriented technology mainly contains two kinds: a kind of is the bipolar head method that liquidates, and produces after utilizing two relative exciting fields of homopolarity to liquidate and is orientated to extraradial magnetic field, for example patent CN00125615.7; Another kind of method for alignment is four extremely poly-magnetic methods, adopts the method for four cartridge homopolarities poly-magnetic to center to be orientated, for example patent CN01111509.2.
The lower shortcoming in radial oriented magnetic field when bipolar the extremely poly-magnetic method of the method and four that liquidates exists the radiation ring of making larger ratio of height to diameter.According to magnetic field continuity principle, when the ratio of height to diameter of molded blank is greater than 1, even if in the ideal situation (magnetic resistance, leakage field, magnetic loss etc. are all disregarded) and adopt the ferro-cobalt that saturated pole intensity is the highest (
h o be about 2.4T) do core iron, when core iron magnetic field intensity reaches capacity, alignment magnetic field is only 1.25T, lower than NdFeB magnetic powder, is orientated conventional 1.5T.In actual production, magnetic resistance, leakage field are unavoidable, so when to adopt prior art to prepare ratio of height to diameter be 0.5 radial oriented radiation ring, alignment magnetic field is difficult to reach 1.5T, cannot realize the making of the radial oriented radiation ring of larger ratio of height to diameter high-performance.
Chinese patent CN00125615.7, authorizes open day May 2 calendar year 2001, discloses the manufacture craft of the radial oriented sintered NdFeB radiation of a kind of one-shot forming ring, and a. inserts the good powder of scale in the cavity impression of lower mould; B. by the program control hydraulic press that starts of CP machine, patrix is drawn close to counterdie, now seaming chuck, upper plug, upper electromagnet DL synchronization suspend after walking to seaming chuck and contacting with negative template; C. power-on and power-off magnet after suspending, radiation ring is magnetized and start radial oriented simultaneously; D. when reach >=1.5T of the magnetic field intensity magnetizing, seaming chuck continues to press down and carries out two-way compacting, release during reach >=15 MPa of pressure; E. go up lower electromagnet oppositely demagnetize (now having completed the radial oriented action of powder); F. patrix lifting, counterdie exit, the depanning of radiation ring; G. the radiation ring after depanning carry out sintering product.This invention adopts is the bipolar head method that liquidates, and has that equipment interoperability is poor, the lower shortcoming of radiation ring height of made.
Summary of the invention
Goal of the invention of the present utility model is the low problem of radiation ring ratio of height to diameter of making in prior art in order to overcome, and provides a kind of for making the orientation pressure setting of larger ratio of height to diameter radiation ring of the radiation ring of larger ratio of height to diameter.
To achieve these goals, the utility model is by the following technical solutions:
An orientation pressure setting for radiation ring, described orientation pressure setting is located on the support of press, and described press is provided with seaming chuck, push-down head, support and controller; Described seaming chuck lower surface is provided with cushion block, and cushion block lower surface is provided with tubulose upper punch; In cushion block, be provided with the first cylindrical cavity, in upper punch, be provided with the upper core iron that upper end is positioned at the first cylindrical cavity and can moves up and down with respect to upper punch;
Described support is provided with two coaxial excitation coils and the former between two magnet exciting coils; The axis parallel of magnet exciting coil, in horizontal plane, is equipped with circular yoke in two magnet exciting coils, and former is made by permeability magnetic material, and former is provided with the second cylindrical cavity, and former contacts with two circular yokes respectively;
Described push-down head upper surface is provided with for penetrating the tubulose low punch in the second cylindrical cavity, is provided with lower core iron in low punch, and lower core iron exposes outside low punch upper end; Controller is electrically connected to press and magnet exciting coil respectively.
Vertical press refers to the press that magnetic field orientating direction is vertical with pressing direction, is that domestic topmost permanent-magnet material is prepared press at present, and in neodymium iron boron field, occupation rate reaches more than 90%.
The utility model has the advantages that device is simple and practical, be placed on common vertical press and can use, can on a press, realize the all-round of square, cylinder and radiation ring magnet and produce, greatly improve the utilization rate of press, reduce press and drop into.Meanwhile, when orientation compacting, by Multistep feeding, can in the situation that not affecting radiation ring performance, improve radiation ring height.Former of the present utility model, lower core iron, upper punch and low punch surround for putting the die cavity of magnetic.
Use the process of the utility model making larger ratio of height to diameter radiation ring as follows:
Permanent magnetism powder is put into die cavity, press drives seaming chuck descending, upper and lower core iron is closed, magnet exciting coil energising produces magnetic field, magnetic field homopolarity is relative, and the magnetic line of force is orientated magnetic through die cavity after assembling in former, then enters core iron, by upper and lower core iron, derive, and get back to yoke formation magnetic loop by press support.
In orientation, complete compacting, then, seaming chuck is up, drives upper punch and upper core iron to depart from former;
In die cavity, again add magnetic, repeat orientation compacting, through repeatedly putting into the process of magnetic, orientation compacting, obtain the radiation ring green compact of larger ratio of height to diameter, radiation ring green compact maximum height can be concordant with former upper surface.The radiation ring green compact that orientation compacting is obtained are put into vacuum sintering furnace sintering, and 1000 ~ 1120 ℃ of sintering temperatures, are incubated 0.5 ~ 6 hour, and carry out necessary temper.
Orientation pressure setting of the present utility model is realized the orientation of larger ratio of height to diameter radiation ring and is suppressed on common vertical press by rational magnetic Circuit Design, on same press according to need of production more changing device both can produce parallel-oriented magnet and also can make radially oriented magnet; By repeatedly adding magnetic, orientation compacting to improve radiation ring height, radiation ring height can be enhanced about more than once.
As preferably, the axial section of described upper core iron is in T shape, and described upper punch upper end is provided with outside horizontally extending annular edge, and annular edge is connected with cushion block lower surface; The internal diameter of described upper punch is less than the diameter of the first cylindrical cavity; In described the first cylindrical cavity, be provided with spring, both ends of the spring is connected with upper core iron upper end with seaming chuck lower surface respectively.
As preferably, upper punch and low punch are made by nonmagnetic steel material.
As preferably, described former is made by pure iron material.
As preferably, the height of former is 25 millimeters to 45 millimeters.
As preferably, the ratio between the height of former and lower core iron external diameter is 2:1 to 2.4:1.
Therefore, the utlity model has following beneficial effect: (1) is applicable to make larger ratio of height to diameter radiation ring; (2) investment for trnasforming urban land is few, applied widely; (3) simple in structure, easy to use.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is another kind of structural representation of the present utility model.
In figure: seaming chuck 1, push-down head 2, cushion block 3, upper punch 4, the first cylindrical cavity 5, upper core iron 6, magnet exciting coil 7, circular yoke 8, the second cylindrical cavity 9, low punch 10, lower core iron 11, spring 12, die cavity 13, former 14.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Embodiment is as shown in Figure 1 and Figure 2 a kind of orientation pressure setting of larger ratio of height to diameter radiation ring, and orientation pressure setting is located on the support of press, and press is provided with seaming chuck 1, push-down head 2, support and controller; Seaming chuck lower surface is provided with cushion block 3, and cushion block lower surface is provided with tubulose upper punch 4; In cushion block, be provided with the first cylindrical cavity 5, in upper punch, be provided with the upper core iron 6 that upper end is positioned at the first cylindrical cavity and can moves up and down with respect to upper punch;
Support is provided with two coaxial excitation coils 7 and the former between two magnet exciting coils 14; The axis parallel of magnet exciting coil, in horizontal plane, is equipped with circular yoke 8 in two magnet exciting coils, former is made by permeability magnetic material, and former is provided with the second cylindrical cavity 9, and former contacts with two circular yokes respectively;
Push-down head upper surface is provided with for penetrating the tubulose low punch 10 in the second cylindrical cavity, is provided with lower core iron 11 in low punch, and lower core iron exposes outside low punch upper end; Controller is electrically connected to press and magnet exciting coil respectively.
The axial section of upper core iron is in T shape, and upper punch upper end is provided with outside horizontally extending annular edge, and annular edge is connected with cushion block lower surface; The internal diameter of upper punch is less than the diameter of the first cylindrical cavity; In the first cylindrical cavity, be provided with spring 12, both ends of the spring is connected with upper core iron upper end with seaming chuck lower surface respectively.Upper punch and low punch are made by nonmagnetic steel material.Ratio between the height of former and lower core iron external diameter is 2:1.Upper and lower core iron and former adopt pure iron material, and the advantage of pure iron material is that price is low, and magnetic conductivity is high.Selecting is highly the former of 40 millimeters.
Adopt the process of the utility model making radiation ring as follows:
Adopt ingot casting method to prepare Nd Fe B alloys, adopt Mechanical Method to prepare meal+airflow milling and prepare fine powder, the equal granularity of magnetic is 4.2 μ m;
In controller, the number of times of default orientation compacting is 3 times, and the pressure adding on upper and lower pressure head during orientation compacting is for the first time 4 MPas, and the dwell time is 2 seconds; Be orientated for the second time pressing pressure 6 MPas, pressurize 4 seconds; Be orientated for the third time pressing pressure 10 MPas, pressurize 12 seconds;
Use the process of the utility model making larger ratio of height to diameter radiation ring as follows:
Permanent magnetism powder is put into die cavity, press drives seaming chuck descending, upper and lower core iron is closed, magnet exciting coil energising produces magnetic field, magnetic field homopolarity is relative, and the magnetic line of force is orientated magnetic through die cavity after assembling in former, then enters core iron, by upper and lower core iron, derive, and get back to yoke formation magnetic loop by press support.
In orientation, complete compacting, then, seaming chuck is up, drives upper punch and upper core iron to depart from former;
In die cavity, again add magnetic, repeat orientation compacting, through repeatedly putting into the process of magnetic, orientation compacting, obtain the radiation ring green compact of larger ratio of height to diameter, radiation ring green compact maximum height can be concordant with former upper surface.The radiation ring green compact that orientation compacting is obtained are put into vacuum sintering furnace sintering, and 1000 ~ 1120 ℃ of sintering temperatures, are incubated 0.5 ~ 6 hour, and carry out necessary temper.
Dividing three orientation compactings is that the object of front twice pressurization is that the magnetic after orientation is fixed in order to reduce the ratio of height to diameter of each orientation compacting radiation ring; The magnetic pine dress of each orientation compacting is highly 20 millimeters, is highly about 12 millimeters after compacting; But leave space will to further raising density, to improve the repeatedly adhesion of radiation interannular; The object of last pressurization is further to improve shaped radiation ring density.
Should be understood that the present embodiment is only not used in restriction scope of the present utility model for the utility model is described.In addition should be understood that those skilled in the art can make various changes or modifications the utility model after having read the content of the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (6)
1. an orientation pressure setting for larger ratio of height to diameter radiation ring, described orientation pressure setting is located on the support of press, and described press is provided with seaming chuck (1), push-down head (2), support and controller; It is characterized in that, described seaming chuck lower surface is provided with cushion block (3), and cushion block lower surface is provided with tubulose upper punch (4); In cushion block, be provided with the first cylindrical cavity (5), in upper punch, be provided with the upper core iron (6) that upper end is positioned at the first cylindrical cavity and can moves up and down with respect to upper punch;
Described support is provided with two coaxial excitation coils (7) and the former between two magnet exciting coils (14); The axis parallel of magnet exciting coil, in horizontal plane, is equipped with circular yoke (8) in two magnet exciting coils, former is made by permeability magnetic material, and former is provided with the second cylindrical cavity (9), and former contacts with two circular yokes respectively;
Described push-down head upper surface is provided with for penetrating the tubulose low punch (10) in the second cylindrical cavity, is provided with lower core iron (11) in low punch, and lower core iron exposes outside low punch upper end; Controller is electrically connected to press and magnet exciting coil respectively.
2. the orientation pressure setting of a kind of larger ratio of height to diameter radiation ring according to claim 1, is characterized in that, the axial section of described upper core iron is in T shape, and described upper punch upper end is provided with outside horizontally extending annular edge, and annular edge is connected with cushion block lower surface; The internal diameter of described upper punch is less than the diameter of the first cylindrical cavity; In described the first cylindrical cavity, be provided with spring (12), both ends of the spring is connected with upper core iron upper end with seaming chuck lower surface respectively.
3. the orientation pressure setting of larger ratio of height to diameter radiation ring according to claim 1, is characterized in that, upper punch and low punch are made by nonmagnetic steel material.
4. the orientation pressure setting of larger ratio of height to diameter radiation ring according to claim 1, is characterized in that, described former is made by pure iron material.
5. according to the orientation pressure setting of the larger ratio of height to diameter radiation ring described in claim 1 or 2 or 3 or 4, it is characterized in that, the height of former is 25 millimeters to 45 millimeters.
6. according to the orientation pressure setting of the larger ratio of height to diameter radiation ring described in claim 1 or 2 or 3 or 4, it is characterized in that, the ratio between the height of former and lower core iron external diameter is 2:1 to 2.4:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320537872.2U CN203437641U (en) | 2013-09-02 | 2013-09-02 | Orientation pressing device of radiation ring with large height-diameter ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320537872.2U CN203437641U (en) | 2013-09-02 | 2013-09-02 | Orientation pressing device of radiation ring with large height-diameter ratio |
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| CN203437641U true CN203437641U (en) | 2014-02-19 |
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| CN201320537872.2U Expired - Lifetime CN203437641U (en) | 2013-09-02 | 2013-09-02 | Orientation pressing device of radiation ring with large height-diameter ratio |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106925777A (en) * | 2015-12-29 | 2017-07-07 | 中核北方核燃料元件有限公司 | A kind of annular dispersion fuel core base mould and forming method |
| CN109346309A (en) * | 2018-11-27 | 2019-02-15 | 杭州科德磁业有限公司 | It is a kind of for being molded the electromagnetism oriented moulding system of anisotropic bonded magnet |
| CN110899693A (en) * | 2019-12-09 | 2020-03-24 | 株洲钻石切削刀具股份有限公司 | Forming method and forming device for powder metallurgy part |
-
2013
- 2013-09-02 CN CN201320537872.2U patent/CN203437641U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106925777A (en) * | 2015-12-29 | 2017-07-07 | 中核北方核燃料元件有限公司 | A kind of annular dispersion fuel core base mould and forming method |
| CN109346309A (en) * | 2018-11-27 | 2019-02-15 | 杭州科德磁业有限公司 | It is a kind of for being molded the electromagnetism oriented moulding system of anisotropic bonded magnet |
| CN110899693A (en) * | 2019-12-09 | 2020-03-24 | 株洲钻石切削刀具股份有限公司 | Forming method and forming device for powder metallurgy part |
| CN110899693B (en) * | 2019-12-09 | 2022-06-14 | 株洲钻石切削刀具股份有限公司 | Forming method and forming device for powder metallurgy part |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |