CN104505246B - Preparation method of magnet for automobile idle speed motor - Google Patents
Preparation method of magnet for automobile idle speed motor Download PDFInfo
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- CN104505246B CN104505246B CN201410734309.3A CN201410734309A CN104505246B CN 104505246 B CN104505246 B CN 104505246B CN 201410734309 A CN201410734309 A CN 201410734309A CN 104505246 B CN104505246 B CN 104505246B
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Abstract
The invention discloses a preparation method of a magnet for an automobile idle speed motor and aims to provide a preparation method of the magnet for an automobile idle speed motor, which is high in production efficiency and high in magnetic ring strength. A manufacturing process of granules is improved, a polar orientating mould is matched, a continuous discharge mode is switched to produce high-strength magnetic fields, so that the granules are arranged orderly; by virtue of an automatic feeding method, an automatic feeding system is used for directly feeding granules in a material storage cavity into a polar orientating pulse type pressing mould to improve the production efficiency, ensure the safety and the continuity of operation, and realize full automation of a radial molding process. The preparation method for the magnet for the automobile idle speed motor not only can be used for lowering the raw material loss, but also can be used for greatly improving the production efficiency; moreover, the quality of the product is improved, the tension strength in a radial magnetic ring product is improved, the safety during the use of the magnetic ring product is ensured, and the magnetic performances of the product are effectively improved.
Description
Technical field
The present invention relates to automobile electronics correlative technology field, refer in particular to a kind of system of idle motors of automobile magnet
Preparation Method.
Background technology
With the raising of people's living standard, family car was developed with swift and violent speed in the last few years.This has driven automobile
The demand of idle motors radial magnet also rapid growth therewith.Dry production full radial magnetic ring technical requirements are high, are subject to always
The monopolization of the offshore companies such as Japan, the U.S., such magnet relies on Japan and imported from America always, but because imported product price is held high
Expensive, have impact on the market demand.
Certainly, our domestic dry production technology in the past also having found out some full radial magnetic rings, such as adopt spoke
Penetrate magnetic field and produce such product.But in process of production, because powder particles are thinner, add the mould that molding alignment magnetic field leads to
Material magnetization, powder is difficult to smoothly enter die cavity, and the powder entering die cavity is distributed and uneven, and these problems cause mould
Tool easily damages, and production efficiency is extremely low, the low defect of magnet ring product strength preparing.
Content of the invention
The present invention is above-mentioned in order to overcome the shortcomings of to exist in prior art, there is provided a kind of production efficiency is high and magnet ring is strong
Spend the preparation method of high idle motors of automobile magnet.
To achieve these goals, the present invention employs the following technical solutions：
A kind of preparation method of idle motors of automobile magnet, by improving the processing technology of particulate material, cooperation is taken with pole
To mould, use continuous discharge mode instead and produce high-strength magnetic field and allow particulate material ordered arrangement, and use automatic feeding method, carry out footpath
To the comprehensive automation of molding procedure, concrete operation step is as follows：
(1) permanent ferrite prefiring material carries out secondary sand milling, and after sand milling, slip precipitation removes water, then with mould pressed compact premagnetization
Change, then by idiosome, in opposing magnetic field, demagnetization is processed, and residual magnetism is moved back only；
(2) demagnetization idiosome crushes powder processed, adds auxiliary additive, is then orientated pulse by automatic feeding system pole
Formula compacting tool set and interval condenser type pulsed field magnetization system carry out magnetic aligning compacting；
(3) blank is after high temperature sintering, then carries out the mill processing of circle product external end face, cleaning, go-on-go, and magnetize the works such as packaging
Sequence, is fully completed production.
By automatic feeding system, the particulate material in storage cavity is sent directly into pole to be orientated in pulsed compacting tool set, to carry
High efficiency and guarantee operate safety, seriality.Automation process improves and not only can decline raw material waste,
Production efficiency can be increased substantially, the quality of product is also improved simultaneously.Radial magnetic ring product internal tension intensity also from
Original 500N about bring up to more than 800N it is ensured that magnet ring product use when safety.Moreover, it relates to radial direction
Magnet ring production method can effectively improve the magnetic property of product compared with conventional preparation method.Therefore, will for same magnetic property
The magnet ring product asked, producing required specifications of raw materials by the method can decline, and magnetic property equally meets customer requirement, this
Sample can effectively reduce cost of material.
Preferably, in step (1), the slip after secondary sand milling goes water to water content 35%～36%, uses mould
Tool pressed compact premagnetization, mould adopts closed magnetic circuit to design, and the green density after mould pressed compact premagnetization controls in 2.9～3.2g/
cm3.Slurry is pressed into after blank, any impact will not be produced on the ordered arrangement of blank during circulation is transported.And it is former
The technique come is directly to magnetize traditional slip in single line bag magnetic field, and shortcoming has magnetizing field low, and water content is higher, no
Less than 40%, slip magnetization back magnetization physical characteristics are easily affected by environment and extraneous factor.
Preferably, in step (1), blank being demagnetized with opposing magnetic field in a mold, carrying out high-temperature process afterwards, place
Reason temperature is 600～800 DEG C, and process time is 1.5～3 hours, thoroughly moves back remainder magnetic.Former technique is then will under the state of magnetizing
Magnetization slip moves away Magnetic Field Source, operation inconvenience, and easy misoperation leads to part slip to change ordered nature, allows part
Magnetize the granule disordering again of ordered arrangement.The powder apparent density that former technique makes is typically in 0.9～1.1g/cm3, stream
Dynamic property is also very poor, and in more than 40 degree of angle of repose, feed powder hardly enters die cavity, has a strong impact on production efficiency.And the present invention preparation and
The particulate material becoming has higher apparent density, generally higher than 1.6g/cm3, mobility also significantly lifts, and angle of repose is not more than
30 degree, it is easy to even into die cavity, improve production efficiency.Simultaneously because particulate material has higher apparent density thus having more
Little charging ratio, it is possible to reduce concave die cavity, saves die cost, and performance improves closely on year-on-year basis under other technique the same terms
The advantage such as 17%.
Preferably, in step (2), described pole orientation pulsed compacting tool set include mould fuse, upper male mould, under
Punch, die inner sleeve, iron core, coiling group and cooling system, described mould fuse is placed in the centre of lower punch, described die
Inside it is placed on the outside of lower punch, described iron core is placed in the outside of die inner sleeve, described cooling system is placed in the outer of iron core
Side, described upper male mould is placed in the top of lower punch and corresponding with the position of lower punch, and described coiling group is placed in iron core
Upper end.Wherein：Coiling group is when making, then is equipped with the materials such as insulating paper, epoxide-resin glue.
Preferably, described mould fuse is made by high-permeability material, described upper male mould and lower punch are equal
It is made using not magnetic conduction or low magnetic permeability material, described die inner sleeve adopts high intensity not magnetic conduction or low magnetic permeability alloy
Material is made, and described iron core is made using high-permeability material, and described coiling group adopts a diameter of 2.5mm's
Cotton covered wire and coiling 3～5 circle, described cooling system is made using the good material of heat conductivity.Iron core pure iron or silicon steel
The high-permeability materials such as piece are made, and cooling system can be made using the good material of the heat conductivity such as 45# steel or fine copper.
Preferably, the descending pressing speed that described pole is orientated pulsed compacting tool set controls in 4～6 meter per seconds.To ensure
Magnetic charging system can during particulate material pressed compact (formed high intensity blank before) at least more than three times electric discharge magnetic efficiency, reach
To the purpose being fully oriented.
Preferably, in step (2), described interval condenser type pulsed field magnetization system is by commercial power AC-DC
And the capacitance group of energy storage and triggering discharge system composition, the capacitance of capacitance group be not less than 10000uF and meet continuous 4～
5 electric discharges are magnetized, and the discharge capacity of every group of electric capacity is not less than 2000uF, and each inter-spike intervals are between 0.01 second to 0.05 second.
Guarantee that its particulate material has sufficient time and magnetic field to make its ordered arrangement before being pressed into blank.
Preferably, in step (2), being controlled using the green density that pole is orientated after the completion of the compacting of pulsed compacting tool set
In 3.0～3.5g/cm3Between.
Preferably, in step (3), the temperature of blank high temperature sintering is 1220～1250 DEG C, after high temperature sintering
Green density reaches 4.9g/cm3More than.
The invention has the beneficial effects as follows：Raw material waste not only can be declined it is also possible to increase substantially production efficiency,
The quality of product is also improved simultaneously；Radial magnetic ring product internal tension intensity improves the peace it is ensured that when magnet ring product uses
Quan Xing；Effectively improve the magnetic property of product.
Brief description
Fig. 1 is the structural representation that pole of the present invention is orientated pulsed compacting tool set；
Fig. 2 is the schematic diagram of upper male mould running orbit.
In figure：1. mould fuse, 2. upper male mould, 3. lower punch, 4. die inner sleeve, 5. iron core, 6. coiling group, 7. cooling system
System.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment 1：
(1) secondary sand milling is carried out using our company's DM4240 permanent ferrite prefiring material, after sand milling, slip precipitation removes water, control
Slip moisture content processed is 36%, then carries out the magnetization precompressed of closed magnetic circuit mould, and die pressure is 10MPa, and precompressed green density is
2.97g/cm3, then by idiosome, in opposing magnetic field, demagnetization is processed, and temperature is 750 DEG C, and process time is 2.5 hours, by residual magnetism
Move back net.
(2) demagnetization idiosome crushes powder processed, adds PVA bonding agent, then uses improved pole in the present invention to be orientated pulsed
Compacting tool set (as shown in Figure 1) and condenser type pulsed field magnetization system carry out magnetic aligning compacting, and pressure is 12MPa, and green density is
3.4g/cm3.
(3) after 1220 DEG C of sintering of high temperature, green density reaches 4.9g/cm to blank3More than, then carry out circle product external end face
Mill processing, cleaning, go-on-go, magnetize the operations such as packaging, is fully completed production.Product is qualified can be delivered for use.
As shown in figure 1, pole orientation pulsed compacting tool set includes mould fuse 1, upper male mould 2, lower punch 3, die inner sleeve
4th, iron core 5, coiling group 6 and cooling system 7, mould fuse 1 is placed in the centre of lower punch 3, and die inner sleeve 4 is placed in lower punch 3
Outside, iron core 5 is placed in the outside of die inner sleeve 4, and cooling system 7 is placed in the outside of iron core 5, and upper male mould 2 is placed in the upper of lower punch 3
Square and corresponding with the position of lower punch 3, coiling group 6 is placed in the upper end of iron core 5.Mould fuse 1 is made by high-permeability material
Form, upper male mould 2 and lower punch 3 are all made using not magnetic conduction or low magnetic permeability material, die inner sleeve 4 adopts high intensity not
Magnetic conduction or low magnetic permeability alloy material are made, and iron core 5 is made using high-permeability material, and coiling group 6 adopts diameter
Cotton covered wire for 2.5mm and coiling 3～5 circle, cooling system 7 is made using the good material of heat conductivity.As shown in Fig. 2 being
The corresponding relation of upper male mould 2 and compacting process in upper male mould 2 running orbit, in figure vertical coordinate 1 is the top edge position of die inner sleeve 4
Put line, abscissa 0-T6 is the descending process of upper male mould 2, T1 is the time of contact of upper male mould 2 and die inner sleeve 4, and T1-T5 is arteries and veins
The impulse electricity time, T6, T7 do the range that upper male mould 2 pushes, and T7-T8 is the up process of upper male mould 2, according to upper male mould
2 running orbit, adjusts the time slot magnetized and time period, meets the progress of automatic feeding system, can guarantee that in pressure again
During system, particulate material has time enough to carry out orientations to ensure the performance of product.Wherein：Pole orientation pulsed compacting
The descending pressing speed of mould controls in 4～6 meter per seconds.
Embodiment 2：
(1) product preparation is carried out using our company's DM4036 permanent ferrite prefiring material, preparation method is with embodiment 1.Its
In：Pre-pressing die pressure 10MPa, precompressed green density is 3.08g/cm3, the demagnetization time is 2 hours, and temperature is 700 DEG C.
(2) demagnetization idiosome crushes powder processed, adds PVA bonding agent, then uses improved pole in the present invention to be orientated pulsed
Compacting tool set (with embodiment 1) and condenser type pulsed field magnetization system carry out magnetic aligning compacting, and pressure is 12MPa, and green density is
3.3g/cm3.
(3) after 1250 DEG C of sintering of high temperature, green density reaches 4.9g/cm to blank3More than, then carry out circle product external end face
Mill processing, cleaning, go-on-go, magnetize the operations such as packaging, is fully completed production.Product is qualified can be delivered for use.
Claims (8)
1. a kind of preparation method of idle motors of automobile magnet, is characterized in that, by improving the processing technology of particulate material, cooperation
Mould is orientated with pole, uses continuous discharge mode instead and produce high-strength magnetic field and allow particulate material ordered arrangement, and use automatic feeding method,
Carry out the comprehensive automation of radial direction molding procedure, concrete operation step is as follows：
(1) permanent ferrite prefiring material carries out secondary sand milling, and after sand milling, slip precipitation removes water, then with mould pressed compact premagnetization, so
By idiosome, in opposing magnetic field, demagnetization is processed afterwards, and residual magnetism is moved back only；
(2) demagnetization idiosome crushes powder processed, adds auxiliary additive, then passes through automatic feeding system and is orientated pulsed pressure with pole
Molding jig and interval condenser type pulsed field magnetization system carry out magnetic aligning compacting；Described pole orientation pulsed compacting tool set includes mould
Tool fuse (1), upper male mould (2), lower punch (3), die inner sleeve (4), iron core (5), coiling group (6) and cooling system (7), described
Mould fuse (1) be placed in the centre of lower punch (3), described die inner sleeve (4) is placed in the outside of lower punch (3), described
Iron core (5) is placed in the outside of die inner sleeve (4), and described cooling system (7) is placed in the outside of iron core (5), described upper male mould
(2) it is placed in the top of lower punch (3) and corresponding with the position of lower punch (3), described coiling group (6) is placed in iron core (5)
Upper end；
(3) blank is after high temperature sintering, then carries out the mill processing of circle product external end face, cleaning, go-on-go, and magnetize the operations such as packaging, entirely
Portion completes production.
2. a kind of preparation method of idle motors of automobile magnet according to claim 1, is characterized in that, in step (1)
In, the slip after secondary sand milling removes water to water content 35%～36%, and with mould pressed compact premagnetization, mould adopts closed magnetic
Road is designed, and the green density after mould pressed compact premagnetization controls in 2.9～3.2g/cm3.
3. a kind of preparation method of idle motors of automobile magnet according to claim 1 and 2, is characterized in that, in step
(1), in, blank is demagnetized with opposing magnetic field in a mold, carries out high-temperature process afterwards, treatment temperature is 600～800 DEG C, process
Time is 1.5～3 hours, thoroughly moves back remainder magnetic.
4. a kind of preparation method of idle motors of automobile magnet according to claim 1, is characterized in that, described mould
Fuse (1) is made by high-permeability material, and described upper male mould (2) and lower punch (3) are all using not magnetic conduction or low magnetic conductance
Rate material is made, and using high intensity, magnetic conduction or low magnetic permeability alloy material are not made described die inner sleeve (4), institute
The iron core (5) stated is made using high-permeability material, described coiling group (6) adopt a diameter of 2.5mm cotton covered wire and
Coiling 3～5 circle, described cooling system (7) is made using the good material of heat conductivity.
5. a kind of preparation method of the idle motors of automobile magnet according to claim 1 or 4, is characterized in that, described pole
The descending pressing speed of orientation pulsed compacting tool set controls in 4～6 meter per seconds.
6. a kind of preparation method of idle motors of automobile magnet according to claim 1, is characterized in that, in step (2)
In, described interval condenser type pulsed field magnetization system by commercial power AC-DC and discharge by the capacitance group of energy storage and triggering
System forms, and the capacitance of capacitance group is not less than 10000uF and meets continuous 4～5 electric discharges and magnetize, the electric discharge of every group of electric capacity
Capacity is not less than 2000uF, and each inter-spike intervals are between 0.01 second to 0.05 second.
7. a kind of preparation method of idle motors of automobile magnet according to claim 1, is characterized in that, in step (2)
In, controlled in 3.0～3.5g/cm using the green density that pole is orientated after the completion of the compacting of pulsed compacting tool set3Between.
8. a kind of preparation method of idle motors of automobile magnet according to claim 1, is characterized in that, in step (3)
In, the temperature of blank high temperature sintering is 1220～1250 DEG C, and the green density after high temperature sintering reaches 4.9g/cm3More than.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410734309.3A CN104505246B (en) | 2014-12-05 | 2014-12-05 | Preparation method of magnet for automobile idle speed motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734309.3A CN104505246B (en) | 2014-12-05 | 2014-12-05 | Preparation method of magnet for automobile idle speed motor |
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| CN104505246B true CN104505246B (en) | 2017-02-22 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1770338A (en) * | 2005-09-08 | 2006-05-10 | 浙江升华强磁材料有限公司 | Forming process for radially oriented magnetic ring |
| CN101169996A (en) * | 2007-09-07 | 2008-04-30 | 横店集团东磁股份有限公司 | A low power consumption Mn-Zn ferrite magnetic material for ultra-high temperature condition and its making method |
| CN101290827A (en) * | 2007-04-18 | 2008-10-22 | 天通控股股份有限公司 | Manganese-zinc ferrite material of high performance and power, and manufacturing method therefor |
| CN103265277A (en) * | 2013-06-14 | 2013-08-28 | 南通飞来福磁铁有限公司 | Preparation method of permanent magnetic ferrite |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3307418B2 (en) * | 1992-02-21 | 2002-07-24 | ティーディーケイ株式会社 | Molding method and method for manufacturing sintered magnet |
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- 2014-12-05 CN CN201410734309.3A patent/CN104505246B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1770338A (en) * | 2005-09-08 | 2006-05-10 | 浙江升华强磁材料有限公司 | Forming process for radially oriented magnetic ring |
| CN101290827A (en) * | 2007-04-18 | 2008-10-22 | 天通控股股份有限公司 | Manganese-zinc ferrite material of high performance and power, and manufacturing method therefor |
| CN101169996A (en) * | 2007-09-07 | 2008-04-30 | 横店集团东磁股份有限公司 | A low power consumption Mn-Zn ferrite magnetic material for ultra-high temperature condition and its making method |
| CN103265277A (en) * | 2013-06-14 | 2013-08-28 | 南通飞来福磁铁有限公司 | Preparation method of permanent magnetic ferrite |
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Denomination of invention: A Preparation Method for Magnets Used in Automobile Idle Motor Effective date of registration: 20230522 Granted publication date: 20170222 Pledgee: Dongyang Branch of China Construction Bank Co.,Ltd. Pledgor: HENGDIAN GROUP DMEGC MAGNETICS Co.,Ltd. Registration number: Y2023330000949 |