CN103341612B - Swing stirring device for preparing semisolid slurry and rheoforming equipment - Google Patents
Swing stirring device for preparing semisolid slurry and rheoforming equipment Download PDFInfo
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- CN103341612B CN103341612B CN201310298037.2A CN201310298037A CN103341612B CN 103341612 B CN103341612 B CN 103341612B CN 201310298037 A CN201310298037 A CN 201310298037A CN 103341612 B CN103341612 B CN 103341612B
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Abstract
The invention provides a swing stirring device for preparing semisolid slurry and rheoforming equipment, and belongs to the field of semisolid metal processing technology. The swing stirring device for preparing the semisolid slurry is composed of swing lifting rods, a swing power device, an alloy melt, fixed stirring rods, a supporting frame, a pony ladle, a stirring chamber, a small sprue, a crucible, heating elements, a die-casting machine, a pressing chamber of the die-casting machine, the semisolid slurry, an injection punch, an extruding machine, a pressing chamber of the extruding machine, an extruding punch and the like. Based on the principles of cooling and stirring, the alloy melt flows in the stirring chamber under the action of the swing stirring rods, the nucleation of the alloy melt is promoted to prepare the semisolid slurry under the stirring action of the fixed stirring rods, and the rheoforming equipment achieves rheoforming easily when matched with forming equipment, such as the die-casting machine, the extruding machine or a forging machine. The swing stirring device for preparing the semisolid slurry and the rheoforming equipment are simple in structure, small in investment, low in production cost, stable and reliable in continuous preparation work, and quite suitable for preparation and forming production of the semisolid metal slurry or blank.
Description
Technical field
The invention belongs to semisolid metal processing technology field, specifically provide a kind of equipment waving agitating device and prepare semi solid slurry and rheological molding.
Background technology
Since phase early 1970s, the researchers such as Massachusetts Institute Technology M C Flemings have founded the concept of semi-solid metal forming, and the preparation of semi-solid metal slurry and forming technique cause the extensive concern of countries in the world as a kind of novel technology.According to document " Behavior of metal alloys in the semisolid state " (M C Flemings, Metall Trans, 1991, 22A:957-981), " a kind of cone cartridge type semi-solid metal slurry that hangs is prepared and conveying device " (Kang Yonglin, Chinese patent, 200810114097.3, 2008) and " metal material semi-solid processing Theory and technology " (monograph: Kang Yonglin, Mao Weimin, Hu Zhuanqi, Science Press, 2004) report, the method obtaining semi-solid metal slurry is a lot, as mechanical mixing method, electromagnetic stirring method, strain the melt activation method caused, grain refinement and remelting process, turbulence effect method, single-screw paddling process, double helix paddling process, low overheat hang plate casting method, melt blend, bubble agitation method etc.Equally, above-mentioned document it is also proposed the reho-forming method of many semi-solid metal slurries, as traditional mechanical agitation type rheological molding, injection chamber prepare slurry formula rheological molding, single-screw mechanical agitation rheological molding, double helix mechanical agitation type rheological molding, low overheat hang plate cast-type rheological molding, CRP(Continuous Rheoconversion process) formula rheological molding, SEED(Swirled Enthalpy Equilibation Device) formula rheological molding etc.But in order to the preparation that reduces semi-solid metal slurry and shaping cost, the scholar of countries in the world, expert and industrial quarters, still in continuous effort, attempt the technology of preparing proposing new semi-solid metal slurry or blank.
Document " semi-solid processing of engineering alloys by a twin-screw rheomolding process. " (S Ji, Z Fan and M J Bevis, Mater Sci & Eng, 2001,299A:210-217) propose: double helix mechanical agitation stream becomes the equipment penetrating casting and mainly comprises liquid magnesium alloy feeding machanism, double helix mechanical agitation mechanism, injection mechanism and center-control mechanism.Becoming at double helix mechanical agitation stream penetrates in the equipment of casting, generally containing waving agitating device for making semisolid slurry, only overheated alloy melt steadily need be imported in double helix mechanical agitation bucket.Feeding machanism can ensure to provide to double helix mechanical agitation mechanism the liquid magnesium alloy that temperature is suitable and quantity is suitable; Liquid magnesium alloy, once enter stirring system, generally by the shearing that double helix agitator is strong, is quickly cooled to the fraction solid of expection; When semi-solid magnesium alloy slurry arrives transfer valve, nascent solid phase changes spherical particle into, and is evenly distributed in the liquid phase of low melting point; When transfer valve is opened, semi-solid magnesium alloy slurry enters pressure chamber, is pressed into mold cavity, and solidifies completely in a mold, finally forms machine components.But this double helix mechanical agitation stream becomes the semi-solid rheological molding penetrated casting machine and be only suitable for magnesium alloy.
Chinese patent 200810114097.3 proposes a kind of suspension cone bucket type semi-solid metal slurry preparation facilities, utilize pony ladle or feeding device that liquid metal is poured into pulping device, aluminium alloy, being subject to strong shear agitation effect by during gap between interior outer cone bucket, finally prepares the semi solid slurry of fine microstructures rounding; In this semi solid slurry equipment, generally containing waving agitating device for making semisolid slurry, only over-heat metal liquid need be poured in cone cylinder.
European patent EP 0745691A1 proposes New Rheocasting technology, is called for short NRC.Gather in NRC technology, first the degree of superheat of casting of molten metal is reduced, by molten metal founder on a tilt flat plate (or Inclined Pipe or slanted half-circle pipe), metal bath flows into mobile phone crucible, again through suitably cooled and solidified, metal paste in the semi-solid-state metal melt that this is carries out temperature adjustment, to obtain uniform as far as possible temperature field or fraction solid, final acquisition semi-solid metal slurry, again this semi-solid-state metal is rewarded and carry out rheo-diecasting or forging, just can be shaped various another to exist.In the equipment of New Rheocasting technique, generally containing waving agitating device for making semisolid slurry, only over-heat metal melt need be watered down reposefully tilt flat plate (Inclined Pipe or slanted half-circle pipe) and going up.
Chinese patent 200710176136.8 proposes a kind of preparation of semi-solid metal slurry and the equipment of rheological molding, superheated melt is poured into the tiltedly straight multiple tube passage be made up of tipping tube and vertical tube and carry out casting of molten metal, promote cooling and the forming core of this molten metal, prepare semi-solid metal slurry and rheological molding.In the equipment of this technology, generally containing waving agitating device for making semisolid slurry, only over-heat metal melt need be poured into oblique sprue.
In addition melt dispersion mixed pulp device (patent: 200620018003.9) is also had; Do not wait curve extruding-shear-induced isothermal spherocrystallization semisolid blank compound preparation method (patent: 03132471.1); Shear cast cold formula semi-solid slurry preparation device (patent: 200810107252.9); Low overheat adds light current magnetic stirring pulping technology (patent: 00109540.74); Undaform inclination version vibration pulping device (patent: 200710011510.9); A kind of device for preparing light alloy semisolid slurry (patent 201120425807.1) etc.In the equipment of above technology, all special agitating device that waves arranged for the preparation of light alloy semisolid slurries such as magnaliums, does not namely utilize and waves agitating device to reach cooling and stir alloy melt promotion forming core.
The various apparatus and method preparing semi-solid alloy slurry respectively have the feature of oneself above, but also all there is respective deficiency, great majority also just rest on the laboratory research stage, still need to propose new pulping device and technology, so that Simplified flowsheet, reduce costs, progressively promote the commercial Application of semisolid metal processing technology.
Summary of the invention
The object of the present invention is to provide a kind of preparation of semi solid slurry and the equipment of rheological molding.The principle that this device utilizes cooling and stirs, alloy melt, due to the effect of vacillating and lifting bar, produces flowing in teeter chamber, and the stirring action being subject to fixing puddler promotes alloy melt forming core, flows out after making semisolid slurry is good from cast gate.The formers such as this equipment and die casting machine, extruder or forging machine are easy to realize rheological molding.
Technical scheme of the present invention is: one is waved agitating device and prepared semi solid slurry and rheopectic shaper, is made up of vacillating and lifting bar, alloy melt, fixing puddler, support, pony ladle, teeter chamber, little cast gate, crucible, heating element heater, die casting machine and pressure chamber, semi solid slurry, injection punch head, extruder and pressure chamber and extruding drift; Described vacillating and lifting bar connects with teeter chamber's outer wall, and described fixing puddler is connected with teeter chamber by support, and crucible is combined with heating element heater; By vacillating and lifting bar, fixing puddler, support, teeter chamber, little cast gate and the agitating device that waves stirring power set composition are combined with die casting machine and pressure chamber and realize rheo-diecasting; By vacillating and lifting bar, fixing puddler, support, teeter chamber, little cast gate and the agitating device that waves stirring power set composition wave agitating device and are combined with extruder and pressure chamber and realize rheo-extrusion.
Semi solid slurry waves agitating device directly can carry out combination with die casting machine and pressure chamber 10 and realize rheo-diecasting, after the semi solid slurry 11 prepared enters die casting machine and pressure chamber 10, semi solid slurry 11 is pressed into die cavity according to technological parameter by injection punch head 12 to carry out filling type, obtains semi-solid products part; Also spare-crucible 8 can be combined with die casting machine and pressure chamber 10, after pouring the semi solid slurry 11 in spare-crucible 8 into compression chamber of die casting machine 10, semi solid slurry 11 is pressed into die cavity and fills type by injection punch head 12 simultaneously.
Semi solid slurry waves agitating device directly can realize rheo-extrusion shaping with extruder and pressure chamber 13 combination, after the semi solid slurry 11 prepared enters extruder and pressure chamber 13, semi solid slurry 11 is pressed into die cavity according to technological parameter by extruding drift 14 to carry out filling type, obtains semi-solid state extrusion part; Also spare-crucible 8 can be combined with extruder and pressure chamber 13, after pouring the semi solid slurry 11 in spare-crucible 8 into extruder pressure chamber 13, semi solid slurry 11 is pressed into die cavity and fills type by extruding drift 14 simultaneously.
The structure of waving agitating device is shown in Fig. 1 and Fig. 2, and vacillating and lifting bar 1 is symmetrically distributed in the both sides of teeter chamber 6, and lower end is connected with swinging driving device, and mode includes but not limited to circumferentially, reciprocating, swing etc.Symmetrical vacillating and lifting bar 1 make teeter chamber 6 back and forth reciprocating swing alloy melt is flowed.The frequency of waving is 10 ~ 120 beats/min.Fixing puddler 3 is fixed on the inside of teeter chamber 6, and puddler is made up of the contour cylinder of some, 10 ~ 200mm bottom distance teeter chamber 6 bottom the high 100 ~ 1000mm cylinder of cylinder.The shape of cylinder cross section comprises and is not limited to circle, square, triangle, ellipse.The material of cylinder comprises and is not limited to steel, pottery, graphite, copper.The material of teeter chamber 6 comprises and is not limited to steel, graphite, pottery, copper; Teeter chamber 6 interior shape comprises and is not limited to semicircle, semiellipse, rectangle, triangle; The inwall brushing ceramic coating of teeter chamber 6, the thickness of coating is 0.1 ~ 2mm; Or the inwall of teeter chamber 6 is equipped with anticorrosion and stick-proof liner; The temperature range of metal bath 2 is molten metal liquidus temperature-50 ° ~ 200 °; The temperature of teeter chamber 6 and fixing puddler 3 is lower than the solidus temperature of this metal bath.
The invention has the advantages that: be that the molten metal of-50 DEG C ~ 200 DEG C pours into teeter chamber by the degree of superheat, this over-heat metal is subject to the cooling effect of wall and puddler, simultaneously again under the effect of waving, melt produces flowing and stirs in teeter chamber, promote alloy melt forming core, prepare semi solid slurry, flow out after slurry prepares from little cast gate, the formers such as this equipment and die casting machine, extruder or forging machine are easy to realize rheological molding.
This equipment eliminates complicated electromagnetic agitation or mechanical stirring device, also complicated Prepared by Low Superheat Pouring is eliminated, also the difficulty of liquidus curve cast is greatly reduced, greatly reduce preparation energy consumption, excellent semi-solid metal slurry can be obtained equally, significantly reduce the preparation cost of semi-solid metal slurry.The production cost of simple in equipment, small investment, foundry goods, extrusion or forging is low, is very applicable to the rheological molding of semi-solid-state metal and the production of blank.
Accompanying drawing explanation
Fig. 1 prepares light alloy semisolid slurry schematic diagram for waving agitating device.
Fig. 2 is for waving agitating device side view.
Fig. 3 is for waving agitating device with die casting machine in conjunction with schematic diagram.
Fig. 4 is for waving agitating device with extruder in conjunction with schematic diagram.
In figure: 1 vacillating and lifting bar, 2-in-1 golden melt, 3 fixing puddlers, 4 supports, 5 pony ladles, 6 teeter chambers, 7 little cast gates, 8 crucibles, 9 heating element heaters, 10 die casting machines and pressure chamber, 11 semi solid slurries, 12 injection punch heads, 13 extruders and pressure chamber, 14 extrude drifts.
Detailed description of the invention
Below in conjunction with example, structure of the present invention and implementation result are described further.
As shown in Figure 1, one of the present invention is waved agitating device and is prepared semi solid slurry and rheopectic shaper, and agitating device, crucible 8, heating element heater 9, die casting machine and pressure chamber 10 that this equipment is made up of vacillating and lifting bar 1, fixing puddler 3, support 4, pony ladle 5, teeter chamber 6 and little cast gate 7 and injection punch head 12 form the rheo-extrusion former that rheo-diecasting former and extruder and pressure chamber 13 and extruding drift 14 form;
Wherein, wave the both sides that connecting rod 1 is symmetrically distributed in described teeter chamber 6, described wave connecting rod 1 upper end and the outer wall of described teeter chamber 6 affixed, described wave connecting rod 1 lower end and described swinging driving device affixed, wave connecting rod 1 described in described swinging driving device 15 passes through and drive that described teeter chamber 6 does circumferentially, reciprocating or oscillatory motion, described fixing puddler 3 is arranged on the center of described teeter chamber 6, affixed with described teeter chamber 6 by described support 4, the side of side, described teeter chamber 6 is provided with little cast gate 7.
example 1:
(1) liquidus curve of test ZL101A aluminium alloy is 615 DEG C, alloy is melted in crucible electrical resistance furnace, when alloy temperature reaches about 720 DEG C, with bell jar by carbon trichloride press-in melt lower curtate (addition is 0.5% of aluminium alloy gross weight) after oven dry, and swing gently, carry out the degasification of alloy melt, deslagging refining process, finally alloy melt temperature is down to 630 DEG C of insulations.
(2) set apparatus of the present invention and wave the teeter chamber of agitating device and puddler temperature is 200 DEG C, the frequency of waving is 30 beats/min, being poured into by alloy melt pony ladle 5 melted for previous step waves in the teeter chamber 6 of agitating device, under the driving of swinging driving device, under teeter chamber 6 is subject to the effect of both sides vacillating and lifting bar 1, generation is waved, waving of teeter chamber 6 drives the alloy melt in teeter chamber to produce motion, produce stirring action by fixing puddler 3 pairs of melts that support 4 is fixing simultaneously, this superheated melt is subject to the cooling effect of wall and fixing puddler 3, simultaneously again under the effect of waving, melt produces flowing and stirs in teeter chamber, promote alloy melt forming core, flow in crucible 8 from little cast gate 7 after slurry prepares, the temperature of slurry is in semi solid zone, a certain proportion of spherical nascent solid phase is uniform-distribution with in its liquid phase collective.
example 2:
(1) liquidus temperature of test A356 aluminium alloy is 615 DEG C, aluminium alloy ingot being put into preheat temperature is in the crucible electrical resistance furnace of 400 DEG C, refining after aluminium alloy temperature reaches 700 DEG C, with bell jar by carbon trichloride press-in melt lower curtate (addition is 0.5% of aluminium alloy gross weight) after oven dry, and swing gently, carry out the degasification of alloy melt, deslagging refining process, finally alloy melt temperature is down to 640 DEG C of insulations.
(2) set apparatus of the present invention and wave the teeter chamber of agitating device and puddler temperature is 250 DEG C, the frequency of waving is 60 beats/min, being poured into by alloy melt 2 melted for previous step waves in the teeter chamber 6 of agitating device, the cooling effect of wall and fixing puddler 3 is subject in this over-heat metal, simultaneously again under the effect of waving, melt produces flowing and stirs in teeter chamber 6, promote alloy melt 2 forming core, flow directly into die casting machine and pressure chamber 10 from little cast gate 7 after making semisolid slurry is good, carry out rheo-diecasting shaping by injection punch head 12.
Claims (4)
1. wave agitating device and prepare semi solid slurry and a rheopectic shaper, it is characterized in that being made up of vacillating and lifting bar (1), alloy melt (2), fixing puddler (3), support (4), pony ladle (5), teeter chamber (6), little cast gate (7), crucible (8), heating element heater (9), die casting machine and pressure chamber (10), semi solid slurry (11), injection punch head (12), extruder and pressure chamber (13) and extruding drift (14); Described vacillating and lifting bar (1) connects with teeter chamber (6) outer wall, and described fixing puddler (3) is connected with teeter chamber (6) by support (4), and crucible (8) and heating element heater (9) combine; By vacillating and lifting bar (1), fixing puddler (3), support (4), teeter chamber (6), little cast gate (7) and the wave agitating device and die casting machine and pressure chamber (10) that stir that power set form combine and realize rheo-diecasting; By vacillating and lifting bar (1), fixing puddler (3), support (4), teeter chamber (6), little cast gate (7) and the agitating device that waves stirring that power set form wave agitating device and extruder and pressure chamber (13) and combine and realize rheo-extrusion.
2. the agitating device that waves according to claim 1 prepares semi solid slurry and rheopectic shaper, it is characterized in that: vacillating and lifting bar (1) make teeter chamber back and forth reciprocating swing alloy melt is flowed; Vacillating and lifting bar (1) is symmetrically distributed in the both sides of teeter chamber (6), and lower end is connected with swinging driving device, and mode comprises circumferentially, reciprocating or swing; The frequency of waving is 10 ~ 120 beats/min.
3. the agitating device that waves according to claim 1 prepares semi solid slurry and rheopectic shaper, it is characterized in that: described fixing puddler (3) is made up of the contour cylinder of some, described height of column is 100 ~ 1000mm, apart from teeter chamber (6) bottom 10 ~ 200mm bottom cylinder; The shape of described cylinder cross section is circular, square, triangle or ellipse; The material of cylinder is steel, pottery, graphite or copper.
4. prepare semi solid slurry and rheopectic shaper according to the agitating device that waves described in claim 1 or 2, it is characterized in that: the material of described teeter chamber (6) is steel, graphite, pottery or copper; Teeter chamber (6) cross sectional shape is semicircle, semiellipse, rectangle or triangle; The inwall of teeter chamber (6) is coated with and is brushed with ceramic coating, and the thickness of described ceramic coating is 0.1 ~ 2mm; Or the inwall of teeter chamber (6) is equipped with anticorrosion and stick-proof liner; The temperature of teeter chamber (6) and fixing puddler (3) is lower than the solidus temperature of this metal bath.
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| CN104907527A (en) * | 2015-06-17 | 2015-09-16 | 深圳领威科技有限公司 | Semi-solid pulping equipment, semi-solid pulping system and semi-solid pulping method |
| CN104962470B (en) * | 2015-07-03 | 2017-07-28 | 西北农林科技大学 | A kind of automatic anaerobic ferment devices |
| CN107213865A (en) * | 2017-07-28 | 2017-09-29 | 洛阳市三诺化工有限公司 | The pendulum that a kind of retort for producing P204 phosphoric acid ester extractants is used |
| CN108580831A (en) * | 2018-05-21 | 2018-09-28 | 东风商用车有限公司 | A kind of semi-solid alloy pulping device and its application method |
| CN109799198B (en) * | 2018-12-19 | 2021-08-03 | 江阴秋毫检测有限公司 | Soil heavy metal detection process |
| CN111375739B (en) * | 2019-12-11 | 2021-11-09 | 金榀精密工业(苏州)有限公司 | Efficient controllable semi-solid die casting process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280526A (en) * | 1997-11-28 | 2001-01-17 | 联邦科学和工业研究组织 | Magnesium pressure casting |
| CN102062543A (en) * | 2011-01-12 | 2011-05-18 | 西安交通大学 | Electromagnetic stirring and vibration combined device for preparing semi-solid slurry of black metal |
| CN202762981U (en) * | 2012-09-10 | 2013-03-06 | 北京科技大学 | Composite stirring semi-solid slurry continuous preparation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000061615A (en) * | 1998-08-27 | 2000-02-29 | Meichuu:Kk | Method for pouring molten metal and device therefor |
| JP2006130520A (en) * | 2004-11-04 | 2006-05-25 | Toyota Motor Corp | Apparatus and method for supplying molten metal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280526A (en) * | 1997-11-28 | 2001-01-17 | 联邦科学和工业研究组织 | Magnesium pressure casting |
| CN102062543A (en) * | 2011-01-12 | 2011-05-18 | 西安交通大学 | Electromagnetic stirring and vibration combined device for preparing semi-solid slurry of black metal |
| CN202762981U (en) * | 2012-09-10 | 2013-03-06 | 北京科技大学 | Composite stirring semi-solid slurry continuous preparation device |
Non-Patent Citations (2)
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| JP特开2000-61615A 2000.02.29 * |
| JP特开2006-130520A 2006.05.25 * |
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