CN104162380A - Semi-solid alloy solution permanent magnet mixing device available for test - Google Patents
Semi-solid alloy solution permanent magnet mixing device available for test Download PDFInfo
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- CN104162380A CN104162380A CN201410378936.8A CN201410378936A CN104162380A CN 104162380 A CN104162380 A CN 104162380A CN 201410378936 A CN201410378936 A CN 201410378936A CN 104162380 A CN104162380 A CN 104162380A
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Abstract
The invention discloses a semi-solid alloy solution permanent magnet mixing device available for a test. The semi-solid alloy solution permanent magnet mixing device is formed by assembling a plurality of permanent magnets and a servo motor as well as a control system, wherein a rotary cylinder is made of a soft magnetic material with high magnetic permeability and eight stages of internal closed gradual-change systems are combined, so that a fixed steel structure is designed, a smaller gap is ensured, and a temperature measuring system is increased. A permanent magnet is driven by a motor to generate a rotary magnetic field so that an induction current is generated by a semi-solid ally solution, thus the alloy solution is rotated, the magnetic induction intensity of a center magnetic field can be adjusted according to the quantity and relative distance of magnetic blocks, and a working environment is met by adopting a cold air system. The permanent magnet mixing device has the functions of solving the problem of high cost of testing, homogenizing ingredients, eliminating the segregation, improving the product quality, preventing the oxidization, and improving the testing precision.
Description
Technical field
The present invention relates to a kind of permanent magnetic device stirring for semi-solid alloy, belong to non-ferrous metal metallurgy and magnetic material utilizes research field, particularly semi-solid alloy technical field of smelting.
Background technology
Smelting furnace magnetic stirring technique proposed in the thirties in 20th century, but in a very long time afterwards, in the exploitation of product, in the concept of electromagnetic agitation, hover always, for many years due to many defects of electromagnetic agitation own, (equipment investment is huge, equipment volume is huge, power consumption is large, safeguard and be difficult for), limited the propagation and employment (in Chinese promotion and application especially slow) of magnetic stirring technique in metal smelt industry, and mechanical type stirs, fluid pressure type stirs directly contact high temperature aluminum liquid, equipment life is short, stir not thorough, also slowly step down from the stage of history.
Permanent magnetic stirring is to utilize the alternating magnetic field producing after the permanent magnet motion of particular combination to carry out noncontact stirring to metal liquid.Permanent magnetic stirrer is equivalent to the motor of the use magnetic field of permanent magnet that air gap is very large, and inductor is equivalent to the stator of motor, and liquation is equivalent to the rotor of motor.The built-in multipole magnetic field of permanent magnetic stirring produces travelling-magnetic-field under the drive of motor, and the metal liquid in magnetic field and molten bath interacts and produces magnetic force, thereby promote metal liquid, does directed movement, plays the effect of stirring.Hence one can see that, and permanent magnetic stirring is that molten metal is carried out to noncontact stirring, can foul solution.The suffered mixing power of the liquation of melt outside is larger, and the suffered mixing power of inner liquation is less; Whole stove liquation is under the promotion of rotating excitation field, Concentric rotation, the melt of rotation is under the effect of centrifugal force, the part that proportion is larger is thrown to the surrounding of smelting furnace, the part that proportion is less is stayed center, and once the larger part of proportion is thrown to the surrounding of smelting furnace, this agitating mode just has no idea to make them to stove central motion, thereby aggravated the inhomogeneities of melt, the speed of rotation is higher, this segregation phenomenon is more outstanding, stirs and has become centrifugation, can not realize the even of liquation chemical composition.If reduce rotary speed to alleviate centrifugal force, just lower near the rotating excitation field speed of pivot part, according to electromagnetic induction principle, smelting furnace core just can not obtain enough mixing powers, make central part be difficult to rotation, speed is lower, and the area of heart portion is just larger, not revolvable part is just larger, can not realize the object stirring equally.The larger this phenomenon of stove is just more outstanding.
In addition, the tender and lovely of permanent magnet is also the major reason that affects permanent magnetism agitating apparatus development.The permanent magnet that permanent magnetism agitating apparatus is used generally adopts the permanent-magnet materials such as neodymium iron boron, the advantage of these permanent-magnet materials is that volume is little, magnetic energy product is high, significantly shortcoming is to responsive to temperature, poor heat stability, will demagnetize, and this setting can only be accomplished 80 ℃～180 ℃ (setting of the permanent magnet of different cultivars is different) once environment temperature surpasses setting, the operating temperature that improves permanent magnet is one of difficult point of permanent-magnet material researcher, is difficult in a short time have breakthrough.Just because of the bad temperature characterisitic of permanent magnet, limited the scope of application of permanent-magnet material.The cooling blower of several permanent magnetism agitating apparatus that use at present obtains ceaselessly lowers the temperature to permanent magnet, as long as aluminium temperature of smelting furnace does not reduce, even if stop stirring, blower fan can not stop, and is exactly this reason.
Summary of the invention
The object of the invention is take electromagnetic induction principle as basis, a kind of semi-solid alloy solution permanent magnetism agitating apparatus that can be used for test is provided.
The present invention described in can be used for test semi-solid alloy permanent magnetism agitating apparatus structure comprise: center heating rod, temperature measurer, cylinder crucible, permanent magnets, rotating disc, servomotor, fixed mount, semi-solid alloy solution;
Fixed mount stationary cylinder crucible, center heating rod and temperature measurer; At cylinder crucible center, put into center heating rod and form central heat source, in cylinder crucible inside, put into temperature measurer, by transfer of data, input computer formation temperature measuring system;
Described permanent magnets is selected ALNiCo8 model, and its Curie temperature is 860 ℃, and operating temperature is 550 ℃, and the forming temperature of magnesium alloy is lower than 500 ℃;
Described servomotor specification 1FK7 50W, turns power for rotating disk provides, and to guarantee permanent magnets High Rotation Speed, magnetic patch rotary speed can regulate simultaneously, to control experimental variable.
Described cylinder is made by the soft magnetic materials of high permeability, and crucible shell adopts non-magnetic stainless steel plate to make.
The applicable scope of this permanent-magnet magnetic agitator is to determine if want to increase the volume of semisolid solution according to the central magnetic field of magnetic patch.The quantity of adjustable magnetic patch and the relative distance of magnetic patch.Because the maximum permissible temperature of magnetic patch is 550 ° of left and right, so this equipment adopts the air-cooled working environment that meets.Because the magnetic field of magnetic patch cannot regulate, so reduce the gap of magnetic patch and crucible as far as possible.Because the magnetic field of magnetic stirrer will penetrate crucible, so the shell of crucible must adopt the manufacture of non-magnetic stainless steel plate.Owing to requiring the speed of magnetic patch rotation to regulate, in order to reduce design cost, adopt servomotor.
Compared with prior art, the invention has the beneficial effects as follows: because being is applied in the melting furnace of drum type brake, adopt side-mounted permanent magnetism Stirring, ingenious a whole set of rational scheme that visualizes, design necessary crucible size, effectively reduce porosity, increased the magnetic induction intensity of rotating excitation field.
At melt center, add center heating rod, imitate the situation of rehoroll-casting process center high temperature, obtain whereby the most effectively testing analogy, the research process of setting simple with tradition compared, and can more analyse in depth the heat-transfer mechanism of Rheologic.In addition, because smelting furnace core can not obtain enough mixing powers, make central part be difficult to rotation, can make core melt after adding heating rod, to make up the deficiency of mixing power, realize the object stirring.
Melt center has added temperature measuring set, this is significant with the temperature analysis of research semi-solid alloy process of setting for test, temperature control system is that can to carry out real time temperature to whole process of setting nearer, measure temperature variation curve, this is conducive to further deepen the impact research that alloy crystal grain forms.
The semisolid permanent magnetism agitating apparatus of test use is very rare at present, this appropriate design has been simplified complete alloy synthesis device, cost and testing expenses have been reduced, increased the control of empirical factor simultaneously, as temperature, wind speed and rotating speed etc., more stress different factors to the analysis of experimental result and research.Basic research itself has certain exploration, and the result in research process, unsuccessful test and undesirable result all may have reference value, even if failed experience is also valuable.Rationally effectively test provides reliable test platform with permanent magnetism agitating apparatus for basic research.
Accompanying drawing explanation
Fig. 1 is semi-solid alloy solution permanent magnetism agitating apparatus basic structure front view;
In figure: 1 center heating rod, 2. temperature measurer, 3. 4. permanent magnets of cylinder crucible (containing non-magnetic stainless steel shell), 5. 6. servomotor, 7. fixed mount (containing dismountable protection device) of rotating disc (with permanent magnets fixed-link);
Fig. 2 is semi-solid alloy solution permanent magnetism agitating apparatus basic structure schematic top plan view;
In figure: 8. semi-solid alloy solution, 9. permanent magnets, 10. temp measuring system (position-movable), 11. center heating rods.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Can first determine the size of cylinder crucible in Fig. 1, the internal diameter of crucible inner core is accomplished to φ 320 mm, and guarantee that it is stainless steel casing, outer casing thickness can be selected 5mm thick steel products, and crucible height design is 320 mm, then according to design size, manufactures fixed mount.Fixedly steelframe total height is set as 1 m, in Fig. 1, temperature measurer and center heating rod height can be located 600 mm, heating rod thickness is 40 mm, temperature measurer is removable at the node at highest point steelframe place, to guarantee to measure the temperature of difference in solution, the quantity of temperature measurer is determined by testing conditions permit own, also by test accuracy, is determined simultaneously, generally speaking, 8 points for measuring temperature of placement are enough; The contact point at heating rod and the highest steelframe place need to be fixed, but is not welded, and provides can retract mode and assemble.
In Fig. 1 the design height of permanent magnets be 160 mm between 240 mm, fused solution is no more than 2/3 of cylinder crucible pot body.The applicable scope of this permanent-magnet magnetic agitator is to determine according to the central magnetic field of magnetic patch, the central magnetic field of this agitator 600 ~ 800Gs for Intensity Design.If want to increase the volume of semisolid solution, the quantity of adjustable magnetic patch and the relative distance of magnetic patch.Because the maximum permissible temperature of magnetic patch is 550 ° of left and right, so this equipment adopts the air-cooled working environment that meets, in Fig. 1, do not provide air cooler, this is external component, does not affect system assembles.Owing to requiring the speed of magnetic patch rotation to regulate, in order to reduce design cost, adopt servomotor.In Fig. 1, rotating disc servomotor in Fig. 1 provides and turns power, adjustable rotating speed size, rotating disk is fixedly connected with welding manner with permanent magnets, and permanent magnets thickness is according to providing manufacturer to determine, finally guarantee that air gap is less than 20mm, i.e. distance between crucible outer wall and permanent magnet.
After rotating disk and permanent magnets are assembled, be arranged in fixed mount, guarantee that fixed mount fixes motionlessly, because air gap is very little, vibrations or minute movement all may cause permanent magnet and cylinder crucible to collide, and unnecessary loss occurs.Definite says, rotating disk outside still needs fixed mount, can pass through steel-pipe welding, itself and fixed mount is fixed as one, to guarantee whole system safe operation.
When system works, semi-solid-state metal solution is to melt in other smelting furnace, limited by the Curie temperature of permanent magnet, after temperature is first measured in suggestion, enters in crucible again, opens temp measuring system, the temperature at Real-Time Monitoring diverse location place simultaneously.As can be seen from the figure permanent magnetic stirring transposition of the present invention is simple in structure, and cost is low, is applicable to improving the refinement of semi-solid alloy crystal grain particle and relevant basic research for test.
Claims (4)
1. one kind can be used for the semi-solid alloy solution permanent magnetism agitating apparatus of testing, it is characterized in that, described semi-solid alloy permanent magnetism agitating apparatus structure comprises: center heating rod, temperature measurer, cylinder crucible, permanent magnets, rotating disc, servomotor, fixed mount, semi-solid alloy solution;
Fixed mount stationary cylinder crucible, center heating rod and temperature measurer; At cylinder crucible center, put into center heating rod and form central heat source, in cylinder crucible inside, put into temperature measurer, by transfer of data, input computer formation temperature measuring system.
According to claim 1 a kind of can be used for test semi-solid alloy solution permanent magnetism agitating apparatus, it is characterized in that: described permanent magnets is selected ALNiCo8 model, its Curie temperature is 860 ℃, and operating temperature is 550 ℃, and the forming temperature of magnesium alloy is lower than 500 ℃.
3. a kind of semi-solid alloy solution permanent magnetism agitating apparatus that can be used for test according to claim 1, is characterized in that: described servomotor specification 1FK7 50W, turns power for rotating disk provides.
4. a kind of semi-solid alloy solution permanent magnetism agitating apparatus that can be used for test according to claim 1, is characterized in that: described cylinder is made by the soft magnetic materials of high permeability, and crucible shell adopts non-magnetic stainless steel plate to make.
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| CN201410378936.8A CN104162380A (en) | 2014-08-04 | 2014-08-04 | Semi-solid alloy solution permanent magnet mixing device available for test |
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| CN201410378936.8A CN104162380A (en) | 2014-08-04 | 2014-08-04 | Semi-solid alloy solution permanent magnet mixing device available for test |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108067148A (en) * | 2016-11-11 | 2018-05-25 | 江苏睿阳精密工业股份有限公司 | A kind of permanent magnetism agitating apparatus for metal semi-solid slurrying |
| CN109154542A (en) * | 2016-03-17 | 2019-01-04 | Sk电信有限公社 | Biological sample pre-processing device |
| CN110102220A (en) * | 2019-05-06 | 2019-08-09 | 上海交通大学 | Permanent magnet mixing plant and melt preparation method suitable for melt preparation |
| CN112772101A (en) * | 2021-03-03 | 2021-05-11 | 石河子大学 | Electromagnetic drive control device for liquid manure |
| CN113893752A (en) * | 2021-09-13 | 2022-01-07 | 中南大学 | Lifting type permanent magnetic stirring device and method |
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| CN2673885Y (en) * | 2003-12-16 | 2005-01-26 | 洪腾生 | Agitator for electroplating jewelry |
| CN1864839A (en) * | 2006-04-17 | 2006-11-22 | 王丽军 | Intelligent heating stirrer and method for controlling same |
| CN203123915U (en) * | 2012-12-16 | 2013-08-14 | 淮南联合大学 | Electromagnetic heating-type magnetic stirring apparatus |
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2014
- 2014-08-04 CN CN201410378936.8A patent/CN104162380A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2673885Y (en) * | 2003-12-16 | 2005-01-26 | 洪腾生 | Agitator for electroplating jewelry |
| CN1864839A (en) * | 2006-04-17 | 2006-11-22 | 王丽军 | Intelligent heating stirrer and method for controlling same |
| CN203123915U (en) * | 2012-12-16 | 2013-08-14 | 淮南联合大学 | Electromagnetic heating-type magnetic stirring apparatus |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109154542A (en) * | 2016-03-17 | 2019-01-04 | Sk电信有限公社 | Biological sample pre-processing device |
| CN108067148A (en) * | 2016-11-11 | 2018-05-25 | 江苏睿阳精密工业股份有限公司 | A kind of permanent magnetism agitating apparatus for metal semi-solid slurrying |
| CN110102220A (en) * | 2019-05-06 | 2019-08-09 | 上海交通大学 | Permanent magnet mixing plant and melt preparation method suitable for melt preparation |
| CN112772101A (en) * | 2021-03-03 | 2021-05-11 | 石河子大学 | Electromagnetic drive control device for liquid manure |
| CN112772101B (en) * | 2021-03-03 | 2024-04-05 | 石河子大学 | Electromagnetic driving control device for liquid fertilizer |
| CN113893752A (en) * | 2021-09-13 | 2022-01-07 | 中南大学 | Lifting type permanent magnetic stirring device and method |
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Application publication date: 20141126 |