CN201704357U - Electromagnet type transverse magnetic field thermal processing equipment - Google Patents
Electromagnet type transverse magnetic field thermal processing equipment Download PDFInfo
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- CN201704357U CN201704357U CN201020200248XU CN201020200248U CN201704357U CN 201704357 U CN201704357 U CN 201704357U CN 201020200248X U CN201020200248X U CN 201020200248XU CN 201020200248 U CN201020200248 U CN 201020200248U CN 201704357 U CN201704357 U CN 201704357U
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- magnetic field
- electromagnet
- transverse magnetic
- iron core
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Abstract
The utility model discloses electromagnet type transverse magnetic field thermal processing equipment the structure of which includes a heating furnace and an electromagnet; the direction of a magnetic field generated by the electromagnet is parallel with the vertical direction of the heating furnace; the structure of the heating furnace includes a furnace shell and a hearth formed by the furnace shell; and a heating body is arranged inside the furnace shell. When the electromagnet type transverse magnetic field thermal processing equipment is used for manufacturing a constant electromagnet core, an iron core to be processed is arranged in the hearth of the transverse magnetic field thermal processing equipment; the temperature inside the hearth is adjusted to a scope which is plus or minus 10 DE GC than the Curie temperature of the iron core by the heating body; an electromagnet is used to apply a magnetic field on the circumference direction of the iron core to be processed; the density of the magnetic field at the central point part of the hearth is 0 to 800 Gs, and is continuously adjustable. The electromagnet type transverse magnetic field thermal processing equipment can be used for processing crystalline or uncrystallized magnetically soft alloy iron core the Curie temperature of which is lower than 600 DEG C; the density of the magnetic field at the central point part of the hearth is high, which can reach 800Gs; and the electromagnet type transverse magnetic field thermal processing equipment has the advantages of low cost, high production efficiency, as well as low cost and energy consumption costs.
Description
Technical field
The utility model relates to Equipment for Heating Processing, is specially a kind of equipment of making permanent magnetic core, particularly utilizes transverse magnetic field thermal treatment to make the electromagnet type transverse magnetic field heat treatment equipment of permanent magnetic core.
Background technology
Soft magnetic materials all is widely used in modern electric power industry, power electronics industry and electronic industry.To the requirement of soft magnetic device, it is to need iron core under the effect of big magneticstrength H that a class is arranged, and has constant magnetic permeability μ, looks the use occasion difference, and its numerical value requires not wait from 10～200,000.
The present situation of permanent magnetoconductivity material is as follows:
(1) the permanent magnetoconductivity material that occurs the earliest is a magnetic powder core, and its magnetic permeability μ is generally 2～200, and material has straight iron powder, iron nickel powder, iron nickel molybdenum powder and iron aluminum silicon powder etc., closely during the last ten years, iron copper niobium silicon boron powder also occurred.
(2) utilize the demagnetization effects principle, offer an air gap in the heart, make magnetic permeability μ unshakable in one's determination reduce to 10～1000 and do not wait according to service requirements at the soft magnet of a closed magnetic circuit.
(3) producing permanent magnetic permeability iron core with the crystallization method, under crystallization temperature, is the trickle crystal grain of easy magnetization axis perpendicular to zone face with the iron-based non-crystalline alloy crystallization promptly, and its μ value is generally 500～4000.
(4) iron core is applied transverse magnetic field thermal treatment, for having horizontal preferably magnetic heat treatment effect, the magnetocrystalline anisotropy constant K of core material and magnetostriction coefficient λ s should go to zero, so magnetic permeability μ is higher, between 1000～200,000.Its treatment process is perpendicular to being added a magneticstrength H by the direction of heat treated closed magnetic circuit girth unshakable in one's determination, because iron core is opened a way with respect to the direction of the action of a magnetic field, has therefore produced a demagnetizing field H opposite with externally-applied magnetic field H at upper and lower ends unshakable in one's determination
N, then act on the true magnetic field H on the iron core
iFor:
H
i＝H-H
N＝H-Nd×J
Wherein, Nd is a demagnetizing factor unshakable in one's determination, and J is a magneticpolarization unshakable in one's determination under the treatment temp, and the J value of nanocrystalline iron core under 500 ℃ is generally more than the 1000Gs, therefore requires externally-applied magnetic field H high more good more, do not make squareness ratio B unshakable in one's determination otherwise reach
r/ B
sThe effect that goes to zero.
Magnetic field H is generally produced by the current coil of energising, can lead to direct current or low frequency ac.
Along with the electronic technology development, constantly increase for the demand unshakable in one's determination of magnetic permeability μ between 1000～200,000, as employed current transformer iron core, split hair caccuracy current transformer iron core, wideband common mode inductance iron core, high-power IGBT invertor iron core and unidirectional pulse transformer core etc. in the antitheft electric watt-hour meter.Therefore, need improve raising,, enlarge turnout to reduce cost to the transverse magnetic field heat treatment technics.
Be used for the heat treated equipment of transverse magnetic field at present mainly by vacuum heat treatment or by the heat treatment furnace of protective atmosphere and can form to Magnetic Field Source two portions that closed circuit iron core applies transverse field strength H.Solenoid type transverse magnetic field heat treatment furnace is at the outside sheathed solenoid coil of heat treatment furnace, places pending iron core at the burner hearth center.By prior heat treatment process, make iron core have best magnetic property, near Curie temperature unshakable in one's determination, add enough magneticstrength H simultaneously, the magnetic domain in the iron core is arranged along the externally-applied magnetic field direction, and maintain this direction all the time along with temperature descends.
For satisfying batch production requirements, the burner hearth of this equipment needs enough spaces, as Φ 400mm * 600mm; And required magneticstrength should be more than 1000Gs; Like this, the minimum outer diameter size of heat treatment furnace will be at Φ 800mm * 1000mm, and then solenoidal volume is very big, and the general magnetic field kinetic potential F that produces is not less than 180KATs, so cost cost height.If will reduce cost, then necessary minification, furnace volume also can reduce like this, and each quantity of handling unshakable in one's determination of producing also greatly reduces, and production efficiency is not high.
In addition, will the solenoid coil that apply magnetic field being cooled off when thermal treatment, is to use cooled with liquid nitrogen generally speaking, also needs to cause the raising of equipment manufacturing cost and production cost with the liquid nitrogen retrieving arrangement.
The Curie temperature of Al-Ni-Co permanent magnet is many more than 780 ℃, and the Curie temperature of amorphous alloy is at 200 ℃～370 ℃, nanometer crystal alloy is about 570 ℃, therefore in experiment, should adopt permanent magnet as Magnetic Field Source, be added in pending two ends unshakable in one's determination, put into heat treatment furnace together and process; But this is not suitable for scale operation, especially to amorphous alloy, because under the permanent the action of a magnetic field of fixed, the operation that picks and places iron core is very dangerous.
Therefore, need make improvements,, cut down the consumption of energy, reduce cost to enhance productivity to prior art.
The utility model content
The present invention aims to provide a kind of electromagnet type transverse magnetic field heat treatment equipment that utilizes transverse magnetic field thermal treatment to prepare permanent magnetic core.
A kind of transverse magnetic field heat treatment equipment comprises process furnace and electro-magnet, and the field direction that electro-magnet produced is parallel to the vertical direction with process furnace; The structure of process furnace comprises furnace shell and the formed burner hearth of furnace shell; The furnace shell inboard is provided with heating element.
The structure of electro-magnet comprises yoke and coil, and coil turn is outside yoke; Be preferably the electro-magnet that has than air gaps.
Aforesaid device can be used for preparing permanent magnetic core, step comprises: the burner hearth of pending iron core being put into the transverse magnetic field heat treatment furnace, utilize heating element temperature in the burner hearth to be heated in the scope of pending Curie temperature unshakable in one's determination ± 10 ℃, apply magnetic field with electro-magnet to direction perpendicular to the girth of pending iron core, in burner hearth central spot magneticstrength is 0～800Gs, and magneticstrength is adjustable continuously.
Iron core can be crystalline state or amorphous non-retentive alloy, and its Curie temperature is 100～600 ℃
This equipment can be used to handle crystalline state or the amorphous soft magnetic alloy iron core that Curie temperature is lower than 600 ℃, and the magneticstrength height of equipment center point reaches as high as 800Gs; Compare with solenoid type transverse magnetic field heat treatment furnace, cost reduces by more than 50, and reaches the same needed electric energy of magneticstrength and can be reduced to 1/5th of solenoid type transverse magnetic field heat treatment furnace, does not also need Magnetic Field Source is lowered the temperature; In addition, this equipment has bigger furnace volume, and the treatable quantity unshakable in one's determination of single production is increased, and can enhance productivity.Therefore, the present invention can save equipment and production cost greatly, cuts down the consumption of energy.
Description of drawings
Fig. 1 is the structural representation of electromagnet type transverse magnetic field heat treatment furnace among the embodiment 1
Fig. 2 is the longitudinal diagram 1-iron core of solenoid type transverse magnetic field heat treatment furnace among the comparative example, 2-process furnace, 201-furnace shell, the 202-burner hearth, 203-heating element, 3-electro-magnet, the 301-yoke, the 302-coil, 303-magnetic pole, 501-furnace shell, the 502-burner hearth, the 503-heating element, 504-thermal insulation layer, 505-solenoid coil
Embodiment
As shown in Figure 1, the electromagnet type transverse magnetic field heat treatment equipment, its structure comprises process furnace 2 and electro-magnet 3, the field direction that two magnetic poles 303 of electro-magnet are produced is parallel with the vertical direction of process furnace.
The structure of process furnace comprises the formed burner hearth 202 in furnace wall 201 and furnace wall; The inboard, furnace wall is around heating element 203.The size of burner hearth is Φ 400mm * 600mm.
The structure of electro-magnet comprises yoke 301 and coil 302, and coil encircling is outside yoke.The material of yoke is a pure iron.
The magneticstrength H calculating formula that electro-magnet produced is:
H＝N×I/L＝k×I
Wherein N is the number of turn of hot-wire coil, and I is a magnetzation current, and L is the electro-magnet gas length.Constant k value in the present embodiment is 38.3Oe/A.
Being added in magneticstrength H on the iron core is by the mmf that current coil produces the yoke of pure iron to be magnetized, and presses B=μ H, and magnetizer (being pure iron) is magnetized to the B value, if μ 5, then the magneticstrength of its generation is about 5 times of solenoid type.
The material unshakable in one's determination that uses is nano-crystal soft magnetic alloy, and as the nanocrystalline Shu Hejin band of 1K107, typical chemical molecular formula is Fe
73.5Cu
1Nb
3Si
13.5B
9, its Curie temperature is at 570 ℃.
Pending iron core vertically is placed in the burner hearth, carries out prior heat treatment process earlier, make iron core have best soft magnetic performance: promptly under vacuum, perhaps add dew-point temperature, temperature in the stove is heated to 470 ℃, insulation 1.5hr at-40 ℃ nitrogen or argon gas; Speed with 50 ℃/hr is warming up to 520 ℃, insulation 1.5hr; Speed with 50 ℃/hr is warming up to 540 ℃～570 ℃ again, insulation 1hr; Be cooled to 20～100 ℃.
Temperature in the burner hearth being readjusted in 560 ℃～580 ℃ the scope and be incubated 1hr, apply magnetic field with electro-magnet to the circumferential direction perpendicular to pending iron core, is 600Gs in burner hearth central spot magneticstrength.Applying neglecting greatly of magneticstrength magnetic permeability unshakable in one's determination reaches required numerical value and decides.As required, magneticstrength is adjustable continuously from 0 to 800Oe.
Handle the resulting permanent magnetic core in back with aforesaid method, its magnetic permeability μ can reach 1000～200,000.
The comparative example
As shown in Figure 2, a kind of solenoid type transverse magnetic field heat treatment furnace, its structure comprises outer field furnace shell 501, and iron core 1 vertically is placed on burner hearth 502 centers, radially outwards successively around heating element 503, thermal insulation layer 504 and solenoid coil 505.
Carry out prior heat treatment earlier, make iron core have best soft magnetic performance; When temperature reaches near the unshakable in one's determination Curie temperature (± 10 ℃) in stove, apply magneticstrength H, magnetic domain unshakable in one's determination is arranged along the externally-applied magnetic field direction, and maintains this direction all the time along with temperature descends, and then Tie Xin magnetization characteristic can form flat magnetic hysteresis loop.
At the center O point place of solenoid coil axis A-A ', magneticstrength is calculated as follows:
Wherein N is the number of turn of institute's coiling on the solenoid coil, and I is the solenoidal electric current (ampere) of flowing through, R
1Be pore radius in the solenoid coil, R
2Be the solenoid coil exradius, L is a solenoid length, α=R
1/ R
2, β=L/R
1
At size of burner hearth is under the situation of Φ 400mm * 600mm, if will reach the magnetic field of 600Gs, this equipment minimum outer diameter size will be at Φ 800mm * 1000mm, and then solenoidal volume is very big, and the general magnetic field kinetic potential F that produces is not less than 180KATs.In addition, also need cooling apparatus that solenoid coil is lowered the temperature.
From embodiment 1 and comparative example, among the embodiment 1, the magneticstrength H that is added on the iron core magnetizes the pure iron yoke by the mmf that current coil produces, press B=μ H, iron core is magnetized to the B value, if μ 5, then the magneticstrength of its generation is about 5 times of solenoid type (comparative example), therefore, embodiment 1 and comparative example are if will obtain identical magneticstrength, embodiment 1 required strength of current and energy consumption is comparative example's 1/5th, and do not need cooling apparatus that electro-magnet is lowered the temperature.
Claims (3)
1. an electromagnet type transverse magnetic field heat treatment equipment is characterized in that, comprises process furnace (2) and electro-magnet (3), and the field direction that electro-magnet (3) is produced is parallel with the vertical direction of process furnace (2);
The structure of process furnace (2) comprises furnace shell (201) and the formed burner hearth of furnace shell (201) (202); Furnace shell (201) inboard is provided with heating element (203).
2. the described a kind of electromagnet type transverse magnetic field heat treatment equipment of claim 1 is characterized in that, the structure of described electro-magnet comprises yoke (301) and coil (302), and coil (302) is looped around outside the yoke (301).
3. claim 1 or 2 described a kind of electromagnet type transverse magnetic field heat treatment equipments is characterized in that described electro-magnet (3) has air gap.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020200248XU CN201704357U (en) | 2010-05-21 | 2010-05-21 | Electromagnet type transverse magnetic field thermal processing equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020200248XU CN201704357U (en) | 2010-05-21 | 2010-05-21 | Electromagnet type transverse magnetic field thermal processing equipment |
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| CN201704357U true CN201704357U (en) | 2011-01-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824512A (en) * | 2010-05-21 | 2010-09-08 | 上海世路特种金属材料有限公司 | Electromagnet type transverse magnetic field heat treatment equipment and method for preparing permanent magnet iron corepermanent magnet |
| CN109439850A (en) * | 2018-12-25 | 2019-03-08 | 内蒙古科技大学 | A kind of material magnetic heat treatment system |
| CN114214507A (en) * | 2021-12-17 | 2022-03-22 | 安徽省湖滨机械厂 | Heat treatment device for high-performance iron-based amorphous nanocrystalline strip |
-
2010
- 2010-05-21 CN CN201020200248XU patent/CN201704357U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824512A (en) * | 2010-05-21 | 2010-09-08 | 上海世路特种金属材料有限公司 | Electromagnet type transverse magnetic field heat treatment equipment and method for preparing permanent magnet iron corepermanent magnet |
| CN101824512B (en) * | 2010-05-21 | 2012-09-05 | 上海世路特种金属材料有限公司 | Method for preparing permanent magnet iron core |
| CN109439850A (en) * | 2018-12-25 | 2019-03-08 | 内蒙古科技大学 | A kind of material magnetic heat treatment system |
| CN114214507A (en) * | 2021-12-17 | 2022-03-22 | 安徽省湖滨机械厂 | Heat treatment device for high-performance iron-based amorphous nanocrystalline strip |
| CN114214507B (en) * | 2021-12-17 | 2023-08-08 | 安徽省湖滨机械厂 | Heat treatment device for high-performance iron-based amorphous nanocrystalline strip |
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Granted publication date: 20110112 Termination date: 20150521 |
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