CN104157387B - A kind of permanent-magnetic clamp assembly and manufacture method thereof - Google Patents
A kind of permanent-magnetic clamp assembly and manufacture method thereof Download PDFInfo
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- CN104157387B CN104157387B CN201410406283.XA CN201410406283A CN104157387B CN 104157387 B CN104157387 B CN 104157387B CN 201410406283 A CN201410406283 A CN 201410406283A CN 104157387 B CN104157387 B CN 104157387B
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Abstract
The invention belongs to technology of instrument and meter field, relate to the manufacturing technology of a kind of inertia type instrument permanent magnet moment-meter assembly, be specially a kind of rare earth cobalt-based radial permanent magnetic ring assembly and manufacture method thereof.This permanent-magnetic clamp assembly uses Rare-Earth Cobalt base permanent magnetic alloy material, multiple radial pole piece (1) are prepared by powder metallurgy process preparation, each radial pole piece (1) has single pole orientation A, prepares by multiple radial pole piece (1) are adhesively fixed the permanent-magnetic clamp assembly forming cylinder-like structure.Permanent-magnetic clamp assembly mechanical strength is reliable, is easily achieved the precision process manufacture of magnetics under neutral state, and after magnetizing, magnetic pole surfaces radial magnetic field intensity is big, good evenness, solving radial permanent magnetic ring surface magnetism can be low, and uniform and stable property is poor, the problem that assembly precision is the highest.
Description
Technical field
The invention belongs to technology of instrument and meter field, relate to a kind of for high accuracy inertia type instrument core
Permanent-magnetic clamp assembly and manufacture method thereof in heart element permanent magnet moment-meter.
Background technology
Along with the development of aerospace industry, to the control accuracy of inertial navigation control system and steady
The qualitative requirements at the higher level that propose, and the miniaturization of system, lightweight development are to inertia type instrument parts
Structural volume and weight demands the harshest.Torquer is as gyroscope, accelerometer etc.
The critical component of inertial measuring unit, the quality of its service behaviour plays ten to inertia type instrument measurement
Divide important effect.All the time permanent magnet moment-meter due to stability and the linearity preferable and extensive
In inertia type instrument, the main composition assembly of permanent magnet moment-meter for be provided that stable, uniform,
The permanent-magnetic clamp in reliable radiation direction magnetic field.By to the performance of torquer permanent-magnetic clamp assembly and structure
Appropriate design is obtained in that good combination property, the permanent magnet moment-meter of compact conformation, thus realizes carrying
The precision and stability that high gyroscope etc. are measured, reduces physical size simultaneously, reduces weight.
Permanent magnet material middle rare earth-cobalt-base permanent magnet material compared with other kind permanent magnet materials magnetic property and
Stability general performance is best, is best suitable for the permanent magnet moment-meter permanent-magnetic clamp for manufacturing inertia type instrument
Assembly.Generally use for pairing on torquer permanent-magnetic clamp modular construction, manufacture permanent magnet moment-meter magnetic
Property assembly art methods mainly has two kinds: traditional method is by parallel magnetization permanent magnet material machine
Tool is processed into the arc angle tile-type magnet steel part not less than 30 degree, magnetizes under strong parallel magnetic field
After saturated, magnet steel part is bonded on circular support alloy shell one by one, in conjunction with forming magnetic unit
Part, assembling constitutes magnetic circuit and forms working gas gap magnetic field.Owing to permanent-magnet alloy belongs to hard brittle material,
Machining property is poor, and magnet steel part to be processed into the precision controlling of tile shape the highest, after magnetizing
Assembling bonding difficulty in ring set big, uniformity consistency is poor, easily causes structure asymmetric, and magnetic takes
Big to angular deviation, the assembly after magnetizing also is difficult to realize Precision Machining further so that magnet ring
Assembly surface Magnetic field inhomogeneity, stability is the highest, and permanent magnet moment-meter using effect is the best.
In order to improve uniformity and the precision of permanent magnet moment-meter permanent-magnetic clamp assembly, reduce harmful dry
Disturbing moment, enhanced stability, another kind of method have employed directly prepares radially oriented permanent-magnetic clamp
Technical matters.This method is based on radially oriented molding and magnetizing equipment, but by appointed condition
Limit the high wall magnet ring being difficult to be orientated good evenness and undersized permanent-magnetic clamp prepare requirement,
Meanwhile, itself there is anisotropy, molding orientation process discontinuity and heat in magnet ring material
The factors such as the internal stress that processing procedure produces make radial magnet ring easily ftracture, and the magnet ring degree of orientation is low,
Be difficult to obtain high surface magnetism energy, improve control moment, applied environment by a definite limitation,
Can not meet instrument miniaturization, in high precision, light-weighted growth requirement.
Inertia type instrument design feature requires that permanent magnet moment-meter structure is more accurate, and compact, performance is steady
Fixed reliable.Thus torquer permanent-magnetic clamp assembly must symmetrical configuration, it is easy to radial magnetize, have
High Surface field, and be evenly distributed, magnetic stability is good, is suitable to precision process processing with flexible
Assembling.Thus the structure design of beneficially permanent magnet moment-meter, reduce harmful moment, adapt to big
Moment variations, improves control accuracy and stability.The permanent-magnetic clamp assembly property that prior art manufactures
Low or uniformity is the highest, limit inertia member to high accuracy, small size weight, high stability
The further development of aspect, is derived from a kind of permanent-magnetic clamp meeting permanent magnet moment-meter development need
Assembly manufacture method is the most necessary.
Summary of the invention
It is an object of the invention to provide a kind of in inertia type instrument torquer permanent-magnetic clamp assembly and
Manufacture method, has high Surface field intensity for manufacture, and uniformity is good, it is easy to Precision Machining
Assembling, it is possible to meet the permanent-magnet component of torquer stability demand for development, mainly as inertia apparatus
Table function element.
For achieving the above object, technical scheme is as follows:
A kind of permanent magnet moment-meter permanent-magnetic clamp assembly, this permanent-magnetic clamp assembly uses rare cobalt base permanent magnetism
Alloy material, prepares multiple pole piece 1 by powder metallurgy process preparation, and each pole piece 1 has
There is single pole orientation A, by multiple pole piece 1 are adhesively fixed formation cylinder-like structure
Permanent-magnetic clamp assembly prepare.
The cross section of described single pole piece 1 is one section of circular arc, and the central angle of circular arc is 5～15 degree.
Permanent-magnetic clamp assembly is annular, and outside dimension is 10～30 millimeters.
The composition of the permanent-magnet alloy of this magnetic ring component (by weight %) is: Sm:24～
27%, Co:45～55%, Cu:3～6%, Zr:2～4%, surplus is Fe.
Remanent magnetism Br=10.5～11.5kGs of this alloy material, coercivity H=10～20kOe.
Single pole piece wall thickness (d) of described permanent-magnetic clamp assembly and single pole piece length (2)
The ratio of final size be 0.7～2.0；
The cylinder heights of described permanent-magnetic clamp assembly meets one or more groups permanent magnet moment-meter magnet ring and makes
Requirement.
The uniform radial magnetic of described permanent-magnetic clamp assembly is close more than 2500Gs.
The preparation method of a kind of permanent-magnetic clamp assembly, comprises the steps:
1) permanent-magnet alloy needed for this permanent-magnetic clamp assembly is first prepared；
2) permanent-magnet alloy meeting radially oriented requirement is processed into can be spliced into the strip of cylinder
Pole piece 1, the cross section of this pole piece 1 is one section of circular arc；
3) with conductive adhesive, multiple pole piece 1 are bonded to cylinder-like structure in a neutral state
Permanent-magnetic clamp base substrate, during permanent-magnetic clamp base substrate bonding, uses and sets according to torquer assembly internal-and external diameter
The fixture that meter manufactures is as constraint fixture；
4) after the cylindric permanent-magnetic clamp base substrate of molding being adhesively fixed and removes constraint fixture, surface throwing is carried out
Optical processing, then by machining and electric machining mode polish, directly or be processed further
Become to meet the permanent-magnetic clamp assembly that the design of torquer assembly requires；
5) acquisition of magnetizing in strong radial magnetic field before assembling has the torquer permanent-magnetic clamp group of different magnetic poles
Part.
Described step 2) use following powder metallurgical technique to complete:
A) become to be grouped into alloyage raw material by alloy raw material, carry out melting ingot casting；
B) after alloy cast ingot coarse crushing, at protective atmosphere downstream powder-grinding；
C) powder uses magnetic field orientating molding, and forming process adds lubricant, further through isostatic cool pressing
Process；
D) protective atmosphere sintering and gradient heat treatment；
E) acquisition meets the rare cobalt base permanent magnetic alloy material of radially oriented requirement.
In step b), powder size a size of 3.5～5 μm.
In step c), magnetic field intensity is more than 1.5T.
In step d), heat treating regime is sintering temperature 1200～1210 DEG C, and the time 0.5～1 is little
Time, then in 1170～1195 DEG C, solution treatment 2～4 hours, it is cooled to room temperature soon, 830～845
DEG C temper 3～12 hours, temperature control is quickly cooled to room temperature after being cooled to 350～400 DEG C.
The beneficial effects of the present invention is:
1) permanent-magnetic clamp assembly manufacture machining accuracy is easily controlled, it is achieved many groups manufacture simultaneously, reduces deviation,
Solve hard fragility permanent-magnet component difficulty processing problems.
2) assembly integral surface is made by the regulation and control of permanent-magnet alloy performance and the design of pole piece shape and structure
Magnetic field homogeneity is obviously improved, and reduces the difficulty that magnetizes simultaneously.
3) technical process is without the concern for overall magnet ring production process stress cracking problem, it is achieved highly oriented
Degree.Meanwhile, described method can realize small size, the system of the particular/special requirement permanent-magnetic clamp assemblies such as Gao Bi
Making, range of application is more extensive.
4) preparation method of permanent magnet moment-meter permanent-magnetic clamp assembly of the present invention makes heteropole in torquer
It is more symmetrical that magnetic ring component constitutes air-gap field structure, and uniformity improves, and is reducing volume weight
In the case of, magnetic assembly can provide sufficiently large gap density, enhances permanent magnetic torque
Device stability, adapts to big moment variations scope, and it is as the key function in high-precision meter
Element, can meet the accurate control applying inertia type instrument under varying environment, measurement requirement, reduce
Permanent magnet moment-meter error.
5) the torquer permanent-magnetic clamp modular construction symmetry manufactured by the present invention is good, and stability is high, table
Face magnetic field intensity improves more than 25%, and circle distribution is uniform.At control moment device permanent-magnetic clamp
Achieve high-performance, the manufacture of high stability permanent-magnetic clamp assembly in the case of assembly volume, improve
Environment resistant interference performance, reduces centroid motion, is particularly suitable for middle-size and small-size high accuracy top
Spiral shell instrument, in the inertia type instrument torquer such as accelerometer, manufacturing technology is conducive to the reality of inertia type instrument
Application.
Accompanying drawing explanation
Fig. 1 is the permanent-magnetic clamp assembly magnetic pole orientation schematic diagram of the present invention.
Fig. 2 is permanent-magnetic clamp assembly plan view of the present invention.
Reference
1 pole piece 2 single pole piece length
D single pole piece wall thickness A pole orientation
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, the detailed description of the invention of the present invention is made the most in detail
Describe.
The used technical scheme of the present invention is to use the rare cobalt base permanent magnetic alloy of good stability, adjusts
The performance of control permanent-magnet alloy, improves magnetic induction, controls coercivity so that permanent-magnetic clamp
Assembly is prone to magnetize and be provided that high magnetic energy exports, and permanent magnet material is processed in a neutral state
Meet the pole piece 1 of given shape dimensional requirement, directly use double-component conducting resinl to be bonded as intensity
Reliably, be suitable to the overall circulus of polish, constitute the coaxial magnetic pole of radial orientation, structure
Design improves Surface field uniformity, reduces assembly quality under meeting behavior pattern, reduces
Hard fragility permanent-magnet component difficulty of processing, reduces manufacturing defect, improves the accuracy of manufacture, and real
Now many group processing and manufacturings simultaneously, acquisition of magnetizing in strong radial magnetic field before assembling has different magnetic poles
The torquer permanent-magnetic clamp assembly of property, magnetic ring component Surface field intensity and uniformity can be adjusted further
Control, it is achieved that be suitable to high accuracy, good stability, the system of small size weight permanent magnet moment-meter parts
Make.
The permanent magnet moment-meter of present invention permanent-magnetic clamp assembly uses rare cobalt base permanent magnetic alloy material,
Becoming to be grouped into (by weight) is Sm:24～27%, Co:45～55%, Cu:3～6%,
Zr:2～4%, surplus is Fe.It is good that this kind of material has temperature stability, corrosion-resistant, anti-moves back
The features such as the magnetic energy product that magnetic energy power is strong and higher, remanent magnetism Br=10.5～11.5kGs, coercivity
Hc=10～20kOe, permanent-magnet alloy Properties Control makes permanent-magnetic clamp assembly be prone to magnetize, and has after magnetizing
There is high Surface field intensity, the strongest air gap flux density can be formed in torquer magnetic circuit.
The preparation method of above-mentioned permanent-magnet alloy is powder metallurgical technique, and technological process includes closing
Gold melting → dry or wet powder process → high-intensity magnetic field oriented moulding → protective atmosphere sintering and gradient heat
Process → obtain the rare cobalt base permanent magnetic alloy material meeting radially oriented requirement.
The permanent magnet moment-meter of present invention rare cobalt base permanent magnetic alloy material needed for permanent-magnetic clamp assembly
Concrete preparation method, comprise the steps:
A) form alloyage raw material by alloying component, carry out melting ingot casting；
B), after alloy cast ingot coarse crushing, at protective atmosphere downstream powder-grinding, powder size is a size of
3.5～5 μm；
C) powder uses magnetic field orientating molding, and magnetic field intensity is more than 1.5T, and forming process adds lubricant,
Process through isostatic cool pressing further；
D) protective atmosphere sintering and gradient heat treatment, wherein, heat treating regime is sintering temperature
1200～1210 DEG C, time 0.5～1 hour, then little in 1170～1195 DEG C of solution treatment 2～4
Time, it is cooled to room temperature soon, 830～845 DEG C of temper 3～12 hours, temperature control was cooled to 350～400
Room temperature it is quickly cooled to after DEG C；
E) acquisition meets the rare cobalt base permanent magnetic alloy material of radially oriented requirement.
The permanent magnet moment-meter permanent-magnetic clamp assembly of the present invention is bonded to cylindrical shape by multiple pole piece 1
The permanent-magnetic clamp assembly of structure, pole piece 1 symmetric arrays, ecto-entad is integrally fixed, such as Fig. 1
Shown in, described permanent-magnetic clamp assembly has multiple pole orientation A.Each pole orientation A of permanent-magnetic clamp assembly
For being orientated consistent single pole piece 1, single individual pole block 1 can be according to permanent magnet moment-meter group
Part design requires that machining forms.As in figure 2 it is shown, single pole piece wall thickness d and single magnetic
The ratio of the final size of pole block length 2 should meet 0.7～2.0, so ensure that permanent-magnetic clamp assembly
Surface field intensity, uniformity and reliability；The cylinder heights of described permanent-magnetic clamp assembly meets one
Group or many group permanent magnet moment-meter magnet rings make requirement, and the uniform radial magnetic of this kind of permanent-magnetic clamp assembly is close
More than 2500Gs.
The concrete preparation method of the permanent magnet moment-meter permanent-magnetic clamp assembly of the present invention, including walking as follows
Rapid:
F) torquer high-performance permanent magnet ring assemblies is the permanent magnet material utilizing above-mentioned process to prepare, and presses
Design requirement according to torquer permanent-magnetic clamp modular construction, the permanent magnet material of radially oriented requirement will be met
It is processed into the strip pole piece 1 that can be spliced into cylinder；
G) utilize high-strength bi-component conducting resinl that single pole piece 1 is bonded to cylinder in a neutral state
The permanent-magnetic clamp idiosome of shape structure, bonding process uses and manufactures and designs according to torquer assembly internal-and external diameter
Fixture as restraint device；
H) after manufacturing the cylindric permanent-magnetic clamp idiosome removing constraint fixture processed, after surface finish processes,
By machining and electric machining mode polish, directly it is further processed into meeting torquer group
The permanent-magnetic clamp assembly that part design requires, first processes circumference surfaces externally and internally during polish, more vertically
Direction electric machining becomes single permanent-magnetic clamp, permanent-magnetic clamp assembly pole piece 1 circumferentially tight symmetric arrays
Being combined into overall structure, described permanent-magnetic clamp assembly mechanical strength is reliable, easier at radial magnetic
Magnetize in Chang, it is thus achieved that uniform radial magnetic field, magnetic field intensity significantly improves.
I) acquisition of magnetizing in strong radial magnetic field before assembling has the torquer permanent-magnetic clamp group of different magnetic poles
Part.
The uniform radial magnetic of single permanent-magnetic clamp assembly surface of employing said method manufacture is close to be more than
2500Gs, improves more than 25% compared with original technology, and overall structure symmetry improves, and one
Cause is good, forms air-gap field uniformity and is obviously improved, further enhancing permanent magnet moment-meter
Precision, job stability and the scope of application.Permanent-magnetic clamp assembly of the present invention is in high accuracy inertia function
Parts demonstrate broad prospect of application, to promoting inertia type instrument to miniaturization, lightweight and height
Degree of stability direction is developed significant.
Embodiment 1
The permanent-magnet alloy process of preparing of embodiment 1 is: alloy raw material becomes to be grouped into (by weight
Than) it is Sm:25%, Co:49%, Cu:5%, Zr:2.8%, Fe:18.2% melting
Ingot casting, after alloy cast ingot coarse crushing, becomes about 5 μm at protective atmosphere airflow milling powder, powder
Using more than 1.5T high-intensity magnetic field oriented moulding, forming process adds lubricant, further through cold etc.
After static pressure processes, being sintered and tempering heat treatment, heat treating regime is sintering temperature 1205 DEG C,
1 hour time, then in 1175 DEG C of solution treatment 4 hours, it is cooled to room temperature soon, at 840 DEG C
Temper 12 hours, temperature control is quickly cooled to room temperature after being cooled to 400 DEG C.Test under room temperature
Permanent magnetic material performance index result, remanent magnetism Br=11.1kGs, coercivity H=17.8kOe, preparation
Rare cobalt based permanent magnetic material be prone to be magnetized into saturated, there is high magnetic flux density.
Design requirement according to torquer permanent-magnetic clamp modular construction, the permanent magnetism of magnetic property requirements will be met
Materials processing becomes to be spliced into the strip pole piece 1 of cylinder, and each pole piece can be formed after magnetizing
The permanent-magnet pole of one radial orientation of circumferential direction inside, single pole piece wall thickness d and single permanent magnetism
Block length 2 size ratio is 1.08, utilizes and meet in permanent magnet moment-meter assembly under magnetic neutral state
The stationary fixture of outside dimension manufacture requirements is fixed into looped cylindrical, passes through between adjacent pole block 1
Double-component conducting resinl is adhesively fixed into a single integrated structure, and after removing fixed jacket, mechanical strength is reliable,
It is directly used in precision process processing and manufacturing.After the drum surface polishing of circulus, pass through
Machining and electric machining mode polish, make powder sintered permanent magnet material for reducing processing technique
Self produce defect, first processing circumference surfaces externally and internally, be more in axial direction broken into single forever
Magnet ring, cylinder heights can meet many group permanent-magnetic clamp assemblies of producing once, it is achieved batch micro operations, institute
The method of stating reduces difficulty of processing, can obtain higher precision, improve structural symmetry.Polish
Good permanent-magnetic clamp assembly magnetizes in corresponding radial magnetic field, and circumferential is the most consistent
Radial magnetic pole, internal and external circumference is respectively N or S pole, circumferential magnetic field intensity and uniformity through inspection
Survey and regulation and control, it is thus achieved that a pair permanent-magnetic clamp assembly meeting magnetic polarity requirement assembles for parts.
Embodiment 2
The permanent-magnet alloy process of preparing of embodiment 2 is: alloy raw material becomes to be grouped into (by weight
Than) it is Sm:24.2%, Co:52.0%, Cu:3.0%, Zr:3.8%, the melting of surplus Fe
Ingot casting, after alloy cast ingot coarse crushing, becomes about 3.5 μm at protective atmosphere airflow milling powder, powder
End uses more than 1.5T high-intensity magnetic field oriented moulding, and forming process adds lubricant, further through cold
After isostatic pressed processes, being sintered and tempering heat treatment, heat treating regime is sintering temperature 1210
DEG C, 35 minutes time, then in 1195 DEG C of solution treatment 2 hours, it is cooled to room temperature soon,
840 DEG C of temper 5 hours, temperature control is quickly cooled to room temperature after being cooled to 400 DEG C.Under room temperature
Test permanent magnetic material performance index result, remanent magnetism Br=10.6kGs, coercivity H=19.6kOe.
The rare cobalt based permanent magnetic material of preparation designs requirement according to torquer permanent-magnetic clamp modular construction,
The permanent magnet material meeting magnetic property requirements is processed into the strip pole piece 1 that can be spliced into cylinder,
Each pole piece 1 can form the permanent-magnet pole of a radial orientation of circumferential direction inside after magnetizing, single
Individual pole piece wall thickness d is 1.92 with single permanent magnets length 2 size ratio, under magnetic neutral state
The stationary fixture meeting permanent magnet moment-meter assembly inside/outside diameter size manufacture requirements is utilized to be fixed into ring-type
Cylinder, is adhesively fixed into a single integrated structure by double-component conducting resinl between adjacent pole block 1, removes
After fixed jacket, mechanical strength is reliable, is directly used in precision process processing and manufacturing.Circulus
Drum surface polishing after, by machining and electric machining mode polish, for reducing
Processing technique makes the defect that powder sintered permanent magnet material self produces, first processing circumference surfaces externally and internally,
The most in axial direction being broken into single permanent-magnetic clamp, cylinder heights can meet to produce once organizes permanent magnetism more
Ring assemblies, it is achieved batch micro operations, described method reduces difficulty of processing, can obtain higher precision,
Improve structural symmetry.The permanent-magnetic clamp assembly that polish is good fills in corresponding radial magnetic field
Magnetic, the radial magnetic pole that circumferential is the most consistent, internal and external circumference is respectively N or S pole, circumference
Magnetic field intensity and uniformity are through detection and regulation and control, it is thus achieved that meet a pair permanent magnetism that magnetic polarity requires
Ring assemblies assembles for parts.
Embodiment 3
The permanent-magnet alloy process of preparing of embodiment 3 is: alloy raw material becomes to be grouped into (by weight
Than) it is Sm:27%, Co:47.8%, Cu:5.5%, Zr:2.2%, the melting of surplus Fe
Ingot casting, after alloy cast ingot coarse crushing, becomes about 4 μm at protective atmosphere airflow milling powder, powder
Using more than 1.5T high-intensity magnetic field oriented moulding, forming process adds lubricant, further through cold etc.
After static pressure processes, being sintered and tempering heat treatment, heat treating regime is sintering temperature 1200 DEG C,
50 minutes time, then in 1170 DEG C of solution treatment 3 hours, it is cooled to room temperature soon, at 830 DEG C
Temper 3.5 hours, temperature control is quickly cooled to room temperature after being cooled to 350 DEG C.Test under room temperature
Permanent magnetic material performance index result, remanent magnetism Br=11.4kGs, coercivity H=11.9kOe.
The rare cobalt based permanent magnetic material of preparation is prone to be magnetized into saturated, has high magnetic flux density.
Design requirement according to torquer permanent-magnetic clamp modular construction, the permanent magnet material of magnetic property requirements will be met
Being processed into the strip pole piece that can be spliced into cylinder, each pole piece can form one after magnetizing
The permanent-magnet pole of the radial orientation of circumferential direction inside, single permanent magnets wall thickness d and single permanent magnetism block length
Spending 2 size ratios is 0.7, utilizes and meet permanent magnet moment-meter assembly internal-and external diameter chi under magnetic neutral state
The stationary fixture of very little manufacture requirements is fixed into looped cylindrical, passes through double-component between adjacent pole block 1
Conducting resinl is adhesively fixed into a single integrated structure, and after removing fixed jacket, mechanical strength is reliable, directly
For precision process processing and manufacturing.After the drum surface polishing of circulus, by machinery
Processing and electric machining mode polish, make powder sintered permanent magnet material self for reducing processing technique
The defect produced, first processing circumference surfaces externally and internally, more in axial direction it is broken into single permanent-magnetic clamp,
Cylinder heights can meet many group permanent-magnetic clamp assemblies of producing once, it is achieved batch micro operations, described method
Reduce difficulty of processing, higher precision can be obtained, improve structural symmetry.Polish is good forever
Magnetic ring component magnetizes in corresponding radial magnetic field, the radial magnetic that circumferential is the most consistent
Pole, internal and external circumference is respectively N or S pole, circumferential magnetic field intensity and uniformity and through detection and adjusts
Control, it is thus achieved that a pair permanent-magnetic clamp assembly meeting magnetic polarity requirement assembles for parts.
Claims (9)
1. a permanent magnet moment-meter permanent-magnetic clamp assembly, it is characterised in that:
This permanent-magnetic clamp assembly uses rare cobalt base permanent magnetic alloy material, passes through powder metallurgy process
Preparation prepares multiple pole piece (1), and each pole piece (1) has single pole orientation A,
Prepare by multiple pole piece (1) being adhesively fixed the permanent-magnetic clamp assembly forming cylinder-like structure；
The composition of the permanent-magnet alloy of this magnetic ring component, by weight percentage, for: Sm:
24～27%, Co:45～55%, Cu:3～6%, Zr:2～4%, surplus is Fe；
Single pole piece wall thickness (d) of described permanent-magnetic clamp assembly and single pole piece length (2)
The ratio of final size be 0.7～2.0；
The cylinder heights of described permanent-magnetic clamp assembly meets one or more groups permanent magnet moment-meter magnet ring and makes
Requirement；
The uniform radial magnetic of described permanent-magnetic clamp assembly is close more than 2500Gs.
2. permanent-magnetic clamp assembly as claimed in claim 1, it is characterised in that:
The cross section of described single pole piece (1) is one section of circular arc, and the central angle of circular arc is 5～15
Degree.
3. permanent-magnetic clamp assembly as claimed in claim 1, it is characterised in that:
Permanent-magnetic clamp assembly is annular, and outside dimension is 10～30 millimeters.
4. permanent-magnetic clamp assembly as claimed in claim 1, it is characterised in that:
Remanent magnetism Br=10.5～11.5kGs of this alloy material, coercivity H=10～20kOe.
5. the preparation method of a permanent-magnetic clamp assembly as claimed in claim 1, it is characterised in that: bag
Include following steps:
1) permanent-magnet alloy needed for this permanent-magnetic clamp assembly is first prepared；The permanent magnetism of this magnetic ring component closes
The composition of gold copper-base alloy, by weight percentage, for: Sm:24～27%, Co:45～55%,
Cu:3～6%, Zr:2～4%, surplus is Fe；
2) permanent-magnet alloy meeting radially oriented requirement is processed into can be spliced into the strip of cylinder
Pole piece (1), the cross section of this pole piece (1) is one section of circular arc；Described permanent-magnetic clamp assembly
Single pole piece wall thickness (d) is 0.7～2.0 with the ratio of the final size of single pole piece length (2)；
3) with conductive adhesive, multiple pole piece (1) are bonded to cylindrical shape in a neutral state tie
The permanent-magnetic clamp base substrate of structure, during permanent-magnetic clamp base substrate bonding, uses inside and outside according to torquer assembly
The fixture that footpath manufactures and designs is as constraint fixture；
4) after the cylindric permanent-magnetic clamp base substrate of molding being adhesively fixed and removes constraint fixture, surface throwing is carried out
Optical processing, then by machining and electric machining mode polish, directly or be processed further
Become to meet the permanent-magnetic clamp assembly that the design of torquer assembly requires；
5) acquisition of magnetizing in strong radial magnetic field before assembling has the torquer permanent-magnetic clamp group of different magnetic poles
Part；The uniform radial magnetic of described permanent-magnetic clamp assembly is close more than 2500Gs.
6. the preparation method of permanent-magnetic clamp assembly as claimed in claim 5, it is characterised in that:
Described step 2) use following powder metallurgical technique to complete:
A) become to be grouped into alloyage raw material by alloy raw material, carry out melting ingot casting；
B) after alloy cast ingot coarse crushing, at protective atmosphere downstream powder-grinding；
C) powder uses magnetic field orientating molding, and forming process adds lubricant, further through isostatic cool pressing
Process；
D) protective atmosphere sintering and gradient heat treatment；
E) acquisition meets the rare cobalt base permanent magnetic alloy material of radially oriented requirement.
7. permanent-magnetic clamp assembly as claimed in claim 6, it is characterised in that:
In step b), powder size a size of 3.5～5 μm.
8. the preparation method of permanent-magnet alloy as claimed in claim 6, it is characterised in that:
In step c), magnetic field intensity is more than 1.5T.
9. the preparation method of permanent-magnet alloy as claimed in claim 6, it is characterised in that:
In step d), heat treating regime is sintering temperature 1200～1210 DEG C, and the time 0.5～1 is little
Time, then in 1170～1195 DEG C, solution treatment 2～4 hours, it is cooled to room temperature soon, at 830～845 DEG C
Temper 3～12 hours, temperature control is quickly cooled to room temperature after being cooled to 350～400 DEG C.
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| CN105012124B (en) * | 2015-08-25 | 2017-11-14 | 浙江和也健康科技有限公司 | A kind of high spatial magnetic energy field massage wheels and massager core |
| CN110783051A (en) * | 2019-12-13 | 2020-02-11 | 烟台首钢磁性材料股份有限公司 | Radiation-oriented sintered neodymium-iron-boron magnetic tile, preparation method and forming device |
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| JPS61136204A (en) * | 1984-12-06 | 1986-06-24 | Sankyo Seiki Mfg Co Ltd | Composite magnet |
| CN201845633U (en) * | 2010-09-21 | 2011-05-25 | 深圳市中震海磁电科技有限公司 | Sintered NdFeB multi-pole magnet ring |
| CN102364617A (en) * | 2011-11-25 | 2012-02-29 | 中国电子科技集团公司第九研究所 | High-uniformity radial orientation neodymium iron boron permanent magnet ring and method for preparing same |
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| CN2620359Y (en) * | 2003-05-27 | 2004-06-09 | 吴文胜 | High-performance radial tube shaped permanent magnetic ferrite |
| CN101552078A (en) * | 2009-01-04 | 2009-10-07 | 康双双 | Composite magnet |
| CN102766835B (en) * | 2012-07-26 | 2014-05-14 | 内蒙古科技大学 | Method for preparing high performance SmCo permanent magnet material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61136204A (en) * | 1984-12-06 | 1986-06-24 | Sankyo Seiki Mfg Co Ltd | Composite magnet |
| CN201845633U (en) * | 2010-09-21 | 2011-05-25 | 深圳市中震海磁电科技有限公司 | Sintered NdFeB multi-pole magnet ring |
| CN102364617A (en) * | 2011-11-25 | 2012-02-29 | 中国电子科技集团公司第九研究所 | High-uniformity radial orientation neodymium iron boron permanent magnet ring and method for preparing same |
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