CN103658565A - Method and special equipment for manufacturing semi-solid metal slurry in low superheat degree permanent magnet stirring mode - Google Patents
Method and special equipment for manufacturing semi-solid metal slurry in low superheat degree permanent magnet stirring mode Download PDFInfo
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- CN103658565A CN103658565A CN201310571084.XA CN201310571084A CN103658565A CN 103658565 A CN103658565 A CN 103658565A CN 201310571084 A CN201310571084 A CN 201310571084A CN 103658565 A CN103658565 A CN 103658565A
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Abstract
The invention discloses a method and special equipment for manufacturing semi-solid metal slurry in a low superheat degree permanent magnet stirring mode. The method includes the following steps of melting refining, quantitative fluid taking, semi-solid slurry preparing, and dumping and pressing injecting, wherein in the working procedure of semi-solid slurry preparing, when a fluid spoon moves to the position above the special equipment, a switch of a lifting mechanism is turned on, the fluid spoon is made to be located in the middle of the interior of a stirring vessel, at the moment, a motor is started, liquid metal is stirred in a rotating permanent magnetic field, the temperature of the liquid metal is lowered, when the temperature of metal melt is lowered to a set technological temperature, a controller controls the lifting mechanism to return to the initial position, and then manufacturing of the semi-solid slurry is completed. According to the method and special equipment, when the slurry is manufactured, the semi-solid slurry is stirred in a non-contact mode, and therefore the semi-solid slurry is not polluted, oxidized impurities can not be formed easily either, and the semi-solid slurry is pure.
Description
Technical field
The present invention relates to a kind of low overheat permanent magnetic stirring and prepare method and the special equipment of semi-solid metal slurry.
Background technology
In semi-solid-state metal (or alloy) rheological molding technology, there is the preparation of semi-solid metal slurry of spherical primary phase in most crucial position.Reducing making semisolid slurry cost, raising preparation quality, shortened process, preparing fast is online the focus of this technology industrialization research and concern.
At present, the preparation method of existing semi-solid metal slurry (special arrangement or the equipment that comprise slurrying) mainly contains following several: mechanical mixing method, electromagnetic stirring method, inclined plane method, liquidus curve casting, chemical grain refinement method, swing roller method, ultrasonic wave facture, spray deposition, damper tube method, serpentine channel method, metal bath mixing method etc.In these methods, except mechanical mixing method, electromagnetic stirring method and inclined plane method comparative maturity, other method or production cost are higher or technological process complicated, so the bibliographical information of rarely seen industrialization aspect.
Summary of the invention
In order to overcome the shortcomings such as in existing making semisolid slurry process, cost is high, technological process is complicated, the invention provides method and special equipment that a kind of low overheat permanent magnetic stirring is prepared semi-solid metal slurry.
The technical solution used in the present invention is:
Low overheat permanent magnetic stirring is prepared the method for semi-solid metal slurry, it is characterized in that: described method comprises the steps:
(1) melting refinement operation: the degree of superheat of liquid metal is controlled in 80～100 ℃ of temperature ranges during melting, then liquid towards metal carries out refining, standing after refining, skim, detect chemical composition and air content, until chemical composition, reach GB and air content reaches after die casting requirement, the degree of superheat of liquid metal is controlled in 10～30 ℃ of temperature ranges;
(2) quantitative soup operation: adopt the soup feeding machine supporting with die casting machine to get soup, before getting soup, soup ladle is preheating to 350～450 ℃, according to the weight summation of foundry goods, slag trap, running gate system and material cake, determine the soup amount of getting, the soup ladle of having got given soup amount is moved to directly over the special equipment of preparing semi-solid metal slurry;
(3) prepare semi solid slurry material process: the switch that starts elevating mechanism in the time of directly over soup ladle moves to special equipment, make soup ladle be placed in stirred vessel bosom position, starter motor now, make liquid metal be stirred and lower the temperature in the permanent-magnetic field of rotation, when the temperature of metal bath drops to the technological temperature of setting, controller is controlled elevating mechanism and is returned to initial position, and now semi-solid metal slurry is prepared complete;
(4) topple over and injection operation: the above-mentioned soup ladle that fills the semi-solid metal slurry preparing is moved to compression chamber of die casting machine top by soup feeding machine, semi-solid metal slurry is directly poured in advance preheated pressure chamber, then directly injection.
Further, described soup ladle is made by ceramic material, and its surface is coated with boron nitride coating layer.
A kind ofly be exclusively used in the equipment that low overheat permanent magnetic stirring described above is prepared the method for semi-solid metal slurry, it is characterized in that: comprise protective cover and be located at elevating mechanism, Stirring mechanism, cooling body and the controlling organization in protective cover, described elevating mechanism, Stirring mechanism and cooling body are all controlled by described controlling organization; Described Stirring mechanism comprises stirred vessel, motor, turntable and permanent-magnet steel, and described cooling body comprises cooling jacket and for measuring the temperature sensor of metal bath temperature, described temperature sensor is connected with described controlling organization;
Described protective cover comprises protective cover and low protection cover, described upper protective cover is connected with motor support plate, on low protection cover, part is connected with motor support plate, lower part is fixed on base, described motor is installed in low protection cover by described motor support plate, described elevating mechanism is arranged in described motor support plate, and on described upper protective cover, low protection cover, part and motor support plate can move up and down under the effect of elevating mechanism;
One end of the turning cylinder of described motor is in transmission connection through described motor support plate and the center that is arranged on the turntable in protective cover, the surrounding of described turntable is symmetrically arranged with described permanent-magnet steel, directly over turntable described in described stirred vessel is arranged on, the surrounding of described stirred vessel and bottom are provided with the cooling jacket that inside is connected with cooling medium.
Further, described elevating mechanism consists of cylinder, and described cylinder one end is connected with described motor support plate, and the other end is installed on base.
Further, described permanent-magnet steel is made by Nd Fe B alloys.
Further, described magnet steel is fixedly mounted on the surrounding of turntable by fixed head.
In the present invention, after superpower permanent-magnet steel is selected, the number of poles of magnet steel assembling determines by required stirring intensity, and be generally assembled into four utmost points or sextupole, position is evenly arranged on fixed head, is respectively N and the S utmost point at the two poles of the earth at diameter two ends.The stirring intensity of liquid metal is also decided by motor speed simultaneously.
Beneficial effect of the present invention is embodied in:
(1) special equipment of semi-solid metal slurry of the present invention is arranged on position between melting furnace (or holding furnace) and compression chamber of die casting machine, take up room very little, the slurry preparing can be toppled over to die casting immediately, save the course of conveying of slurry, make the temperature of slurry controlled;
(2) when preparing slurry, semi solid slurry is contactless stirring, thereby not contaminated, is also difficult for forming oxide inclusion, and semi solid slurry is purer.
Accompanying drawing explanation
Fig. 1 is that low overheat permanent magnetic stirring of the present invention is prepared semi-solid metal slurry device schematic diagram.
The specific embodiment
In the present embodiment, motor support plate and turntable are made of austenitic stainless steel, and fixed head is done with A3 steel; The magnetic field intensity of superpower permanent-magnet steel is selected according to the number of the size of agitator internal diameter and slurry; Cooling jacket is made of austenitic stainless steel; Temperature sensor is nickel chromium triangle/nisiloy type thermocouple; Upper protective cover and low protection cover all adopt austenitic stainless steel to make.
Nickel chromium triangle/nisiloy type thermocouple is arranged in the inner bottom side of soup ladle and exceeds 10～15mm position, bottom surface, is used for immediately measuring the temperature of metal bath in soup ladle.
With reference to Fig. 1, low overheat permanent magnetic stirring is prepared the method for semi-solid metal slurry, and described method comprises the steps:
(1) melting refinement operation: the degree of superheat of liquid metal is controlled in 80～100 ℃ of temperature ranges during melting, then liquid towards metal carries out refining, standing after refining, skim, detect chemical composition and air content, until chemical composition, reach GB and air content reaches after die casting requirement, the degree of superheat of liquid metal is controlled in 10～30 ℃ of temperature ranges;
(2) quantitative soup operation: adopt the soup feeding machine supporting with die casting machine to get soup, before getting soup, soup ladle is preheating to 350～450 ℃, according to the weight summation of foundry goods, slag trap, running gate system and material cake, determine the soup amount of getting, the soup ladle of having got given soup amount is moved to directly over the special equipment of preparing semi-solid metal slurry;
(3) prepare semi solid slurry material process: the switch that starts elevating mechanism in the time of directly over soup ladle moves to special equipment, make soup ladle be placed in stirred vessel 1 bosom position, now starter motor 8, make liquid metal be stirred and lower the temperature in the permanent-magnetic field of rotation, when the temperature of metal bath drops to the technological temperature of setting, controller is controlled elevating mechanism and is returned to initial position, and now semi-solid metal slurry is prepared complete;
(4) topple over and injection operation: the above-mentioned soup ladle that fills the semi-solid metal slurry preparing is moved to compression chamber of die casting machine top by soup feeding machine, semi-solid metal slurry is directly poured in advance preheated pressure chamber, then directly injection.
Further, described soup ladle is made by ceramic material, and its surface is coated with boron nitride coating layer.
A kind ofly be exclusively used in the equipment that low overheat permanent magnetic stirring described above is prepared the method for semi-solid metal slurry, comprise protective cover and be located at elevating mechanism, Stirring mechanism, cooling body and the controlling organization in protective cover, described elevating mechanism, Stirring mechanism and cooling body are all controlled by described controlling organization; Described Stirring mechanism comprises stirred vessel 1, motor 8, turntable 5 and permanent-magnet steel 3, described cooling body comprises cooling jacket 2 and for measuring the temperature sensor of metal bath temperature, described temperature sensor is connected with described controlling organization;
Described protective cover comprises protective cover 6 and low protection cover 10, described upper protective cover 6 is connected with motor support plate 7, on low protection cover 10, part is connected with motor support plate 7, lower part is fixed on base 11, described motor 8 is installed in low protection cover 10 by described motor support plate 7, described elevating mechanism is arranged in described motor support plate 7, and on described upper protective cover 6, low protection cover 10, part and motor support plate 7 can move up and down under the effect of elevating mechanism;
One end of the turning cylinder of described motor 8 is in transmission connection through described motor support plate 7 and the center that is arranged on the turntable 5 in protective cover 6, the surrounding of described turntable 5 is symmetrically arranged with described permanent-magnet steel 3, directly over turntable 5 described in described stirred vessel 1 is arranged on, the surrounding wall of described stirred vessel 1 and bottom are provided with the cooling jacket 2 that inside is connected with cooling medium.
Further, described elevating mechanism consists of cylinder 9, and described cylinder 9 one end are connected with described motor support plate 7, and the other end is installed on a base 11, and the levelness of described base 11 is regulated by fot screw 12.
Further, described permanent-magnet steel 3 is made by Nd Fe B alloys.
Further, described magnet steel is fixedly mounted on the surrounding of turntable 5 by fixed head 4.
Content described in this description embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also and in those skilled in the art, according to the present invention, conceive the equivalent technologies means that can expect.
Claims (5)
1. low overheat permanent magnetic stirring is prepared the method for semi-solid metal slurry, it is characterized in that: described method comprises the steps:
(1) melting refinement operation: the degree of superheat of liquid metal is controlled in 80～100 ℃ of temperature ranges during melting, then liquid towards metal carries out refining, standing after refining, skim, detect chemical composition and air content, until chemical composition, reach GB and air content reaches after die casting requirement, the degree of superheat of liquid metal is controlled in 10～30 ℃ of temperature ranges;
(2) quantitative soup operation: adopt the soup feeding machine supporting with die casting machine to get soup, before getting soup, soup ladle is preheating to 350～450 ℃, according to the weight summation of foundry goods, slag trap, running gate system and material cake, determine the soup amount of getting, the soup ladle of having got given soup amount is moved to directly over the special equipment of preparing semi-solid metal slurry;
(3) prepare semi solid slurry material process: the switch that starts elevating mechanism in the time of directly over soup ladle moves to special equipment, make soup ladle be placed in stirred vessel bosom position, starter motor now, make liquid metal be stirred and lower the temperature in the permanent-magnetic field of rotation, when the temperature of metal bath drops to the technological temperature of setting, controller is controlled elevating mechanism and is returned to initial position, and now semi-solid metal slurry is prepared complete;
(4) topple over and injection operation: the above-mentioned soup ladle that fills the semi-solid metal slurry preparing is moved to compression chamber of die casting machine top by soup feeding machine, semi-solid metal slurry is directly poured in advance preheated pressure chamber, then directly injection.
2. low overheat permanent magnetic stirring as claimed in claim 1 is prepared the method for semi-solid metal slurry, it is characterized in that: described soup ladle is made by ceramic material, and its surface is coated with boron nitride coating layer.
3. be exclusively used in low overheat permanent magnetic stirring as claimed in claim 1 and prepare the equipment of the method for semi-solid metal slurry, it is characterized in that: comprise protective cover and be located at elevating mechanism, Stirring mechanism, cooling body and the controlling organization in protective cover, described elevating mechanism, Stirring mechanism and cooling body are all controlled by described controlling organization; Described Stirring mechanism comprises stirred vessel, motor, turntable and permanent-magnet steel, and described cooling body comprises cooling jacket and for measuring the temperature sensor of metal bath temperature, described temperature sensor is connected with described controlling organization;
Described protective cover comprises protective cover and low protection cover, described upper protective cover is connected with motor support plate, on low protection cover, part is connected with motor support plate, lower part is fixed on base, described motor is installed in low protection cover by described motor support plate, described elevating mechanism is arranged in described motor support plate, and on described upper protective cover, low protection cover, part and motor support plate can move up and down under the effect of elevating mechanism;
One end of the turning cylinder of described motor is in transmission connection through described motor support plate and the center that is arranged on the turntable in protective cover, the surrounding of described turntable is symmetrically arranged with described permanent-magnet steel, directly over turntable described in described stirred vessel is arranged on, the surrounding of described stirred vessel and bottom are provided with the cooling jacket that inside is connected with cooling medium.
4. equipment as claimed in claim 3, is characterized in that: described elevating mechanism consists of cylinder, and described cylinder one end is connected with described motor support plate, and the other end is installed on a base.
5. equipment as claimed in claim 4, is characterized in that: described permanent-magnet steel is made by Nd Fe B alloys.
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| CN201310571084.XA CN103658565A (en) | 2013-11-13 | 2013-11-13 | Method and special equipment for manufacturing semi-solid metal slurry in low superheat degree permanent magnet stirring mode |
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| CN201310571084.XA CN103658565A (en) | 2013-11-13 | 2013-11-13 | Method and special equipment for manufacturing semi-solid metal slurry in low superheat degree permanent magnet stirring mode |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103962539A (en) * | 2014-03-27 | 2014-08-06 | 慈溪阿尔特新材料有限公司 | Turbulent-flow channel pouring method for preparing semi-solid metal slurry and device special for turbulent-flow channel pouring method for preparing semi-solid metal slurry |
| CN105170962A (en) * | 2015-09-06 | 2015-12-23 | 张卫红 | Aluminium alloy semisolid three-in-one rapid cooling slurrying device and method |
| CN105750521A (en) * | 2016-03-02 | 2016-07-13 | 慈溪阿尔特新材料有限公司 | Semi-solid rheologic die-casting method capable of refining primary silicon of high-silicon aluminum alloy and device thereof |
| CN113893752A (en) * | 2021-09-13 | 2022-01-07 | 中南大学 | Lifting type permanent magnetic stirring device and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962539A (en) * | 2014-03-27 | 2014-08-06 | 慈溪阿尔特新材料有限公司 | Turbulent-flow channel pouring method for preparing semi-solid metal slurry and device special for turbulent-flow channel pouring method for preparing semi-solid metal slurry |
| CN105170962A (en) * | 2015-09-06 | 2015-12-23 | 张卫红 | Aluminium alloy semisolid three-in-one rapid cooling slurrying device and method |
| CN105750521A (en) * | 2016-03-02 | 2016-07-13 | 慈溪阿尔特新材料有限公司 | Semi-solid rheologic die-casting method capable of refining primary silicon of high-silicon aluminum alloy and device thereof |
| CN105750521B (en) * | 2016-03-02 | 2018-01-30 | 慈溪阿尔特新材料有限公司 | A kind of semi-solid rheological pressure casting method and its device that can refine silumin primary silicon |
| 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: 20140326 |