CN202910263U - Device capable of being used for continuously preparing semi-solid slurry - Google Patents

Device capable of being used for continuously preparing semi-solid slurry Download PDF

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Publication number
CN202910263U
CN202910263U CN 201220493112 CN201220493112U CN202910263U CN 202910263 U CN202910263 U CN 202910263U CN 201220493112 CN201220493112 CN 201220493112 CN 201220493112 U CN201220493112 U CN 201220493112U CN 202910263 U CN202910263 U CN 202910263U
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semi
slurry
cooling
solid
solid slurry
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康永林
周冰
郜俊震
张军
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Beijing University of Technology
University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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Abstract

A device capable of being used for continuously preparing semi-solid slurry belongs to the technical field of semi-solid metal processing. The device capable of being used for continuously preparing the semi-solid slurry comprises a discharge opening, a heating element, a cooling element, stirring cooling ribbed slabs, a feeding opening, a bearing, a gear, stirring shafts, a bearing base, a gasket, an air hole, an insulating layer, a stainless steel taper tube, a graphite internal taper tube and a graphite blocking. The slurry is in a supercooled state due to the fact that alloy melt is subject to the cooling functions of a tube wall and the ribbed slabs during the preparation process; primary solid phase forms into a spherical shape and the semi-solid slurry is obtained due to the shearing function of the stirring ribbed slabs. The slurry outflow speed is controlled through the graphite blocking, and the semi-solid slurry is combined with conventional devices such as, a die-casing device, a rolling device, a forging device and the like to perform rheolytic formation. The device capable of being used for continuously preparing the semi-solid slurry has the advantages of being compact in structure, simple in detachment, high in temperature control accuracy, stable and reliable in continuous preparation, free of slurry blocking and being maintained periodically but not being cleaned every day.

Description

A kind of continuous production semi solid slurry materials device
Technical field
The utility model relates to a kind of floor and stirs cone cartridge type semi-solid slurry preparation device and method.Belong to the semisolid metal processing technology field.
Background technology
Since phase early 1970s, the researchers such as the M C Flemings of Massachusetts Institute Technology have founded the concept of semi-solid metal forming, and the preparation of semi-solid metal slurry and forming technique have caused the extensive concern of countries in the world as a kind of novel technology.Semi-solid processing is the method for utilizing metal from liquid state to Solid State Transformation or forming from solid-state characteristic to having liquid state changes (being liquid-solid coexistence) process, this new manufacturing process combines the strong point of solidifying processing and plastic working, be that processing temperature is lower than liquid, fill type steady, impact little to mold hot; Resistance of deformation is less than solid-state, thereby is conducive to be shaped complicated part and reduce power consumption, enhances productivity.
Semi-solid state forming technique mainly comprises thixotropic forming and rheological molding.Thixotropic forming technique is that the semi solid slurry that will prepare is cast as first blank, after post bake, forms processing again, and the controllability of its technique is strong, process stabilization and easy to operate, but technological process is long, and energy consumption is large, and cost is higher.Rheological molding technique is carried out rheological molding processing by the semi solid slurry of preparation, has the characteristics such as production procedure is short, relative cost is low, equipment is simple, is subject in recent years generally paying attention to both at home and abroad, and development rapidly.No matter be thixotropic forming or rheological molding, all include semisolid slurrying and semi-solid-state shaping two parts, wherein, slurrying is the basis of whole process and crucial, how to stablize, effectively prepare have rounding, the study hotspot that tiny, semi solid slurry uniform non-dendritic structure becomes the semi-solid processing field.
The preparation of high-quality semi solid slurry is prerequisite and the key of semisolid metal processing technology, at present, existing multiple semi-solid slurry preparation device and method, for example: BP UK9922696 has proposed double helix mechanical agitation rheological molding technique; European patent EP 0745691A1 has proposed New Rheocasting (NRC) technology; US Patent No. 6645323B2 has proposed Semi-solid Rheocasting (SSR) rheological molding technique etc.
Evening is carried out in domestic research work for semi-solid processing, but development rapidly.Non-ferrous metal is studied many scientific research institutions and the colleges and universities such as total institute, Harbin Institute of Technology, University of Science ﹠ Technology, Beijing, Shanghai University, University Of Nanchang, the Central China University of Science and Technology, conduct in-depth research at aspects such as Semi-Solid Metals Forming theory, slurry rheological behaviour, forming technologies, and develop semi-solid slurry preparation device and the method that differs from one another, representational have: melt disperses mixed pulp device (patent: 200620018003.9); Do not wait the compound preparation method of curve extruding-shear-induced isothermal spherocrystallization semisolid blank (patent: 03132471.1); Suspension cone bucket type semi-solid metal slurry preparation facilities (patent: 200810114097.3); Low overheat adds light current magnetic stirring pulping technology (patent: 00109540.74); A undaform inclination version vibration pulping device (patent: 200710011510.9); A kind of device for preparing light alloy semisolid slurry (patent 201120425807.1) etc.
The apparatus and method of above various preparation semi-solid alloy slurries respectively have the characteristics of oneself, but also all there is deficiency separately, great majority also just rest on the laboratory research stage, still new pulping device and technology need be proposed, so that simplification technique, reduce cost, progressively promote the commercial Application of semisolid metal processing technology.
Summary of the invention
The purpose of this utility model is to provide a kind of device of continuous production semi solid slurry, solves the problem that continous-stable prepares semi solid slurry.The principle that this device adopts cooling and shears, alloy melt is subject to boring the cooling effect of barrel and floor in preparation process, make slurry be in cold state, is subject to again stirring simultaneously the shear action of floor, nascent solid phase direct growth is spherical, obtains the tiny semi solid slurry of crystal grain.
A kind of floor stirs cone cartridge type semi-solid slurry preparation device, mainly stir cooling floor, 5 charging apertures, 6 bearings, 7 gears, 8 shafts, 9 bearing blocks, 10 pads, 11 passages, 12 heat-insulation layers, 13 stainless steel pricker cylinders, 14 cone cylinder liners, 15 graphite obstructions etc. by 1 discharging opening, 2 heating element heaters, 3 cooling elements, 4 and form (seeing accompanying drawing 1), wherein stainless steel pricker cylinder, cone cylinder liner have consisted of the alloy melt teeter chamber, liner adopts the materials little with the alloy solution compatibility such as graphite ceramic, can effectively reduce the sizing problem of alloy melt.Be tied with heating element heater and cooling element outside the teeter chamber, there is heat-insulation layer the outside again, cooperates attemperating unit (not marking among the figure) can realize the temperature stabilization of teeter chamber in the continuous production process.Discharging opening is arranged at the bottom of teeter chamber, and charging aperture and passage are arranged at the top, can lead to protective gas, to reduce the oxidation of alloy.Shaft is arranged in the middle of the teeter chamber, be fixed on the bearing block by bearing, the shaft bottom has several to stir the cooling floor, stir the disk that cooling floor top is welded with inclination, the shaft bottom is fixed with graphite with bolt and stops up, the Position Control of stopping up is stopped up and the slit of graphite liner by regulating, and realizes the rate of outflow of slurry in the continuous slurry preparation process.Shaft drives High Rotation Speed by buncher by travelling gear, rotational speed regulation scope 0~800rad/min, and rotating speed is higher, and shear strength is larger.
Preferably, the teeter chamber adopts the design of cone cartridge type, and a cone cylinder liner material be graphite or the ceramic material little with alloy melt affinity, cone angular range: α=5 ~ 80 °.
Preferably, puddler adopts along axisymmetric stirring cooling floor, and High Rotation Speed alloy melt stirs under the drive of buncher; Stir the gap of cooling floor and teeter chamber's inwall existence 2 ~ 10mm, stirring cooling ribs sheet material matter is steel or pottery, and the quantity that stirs the cooling floor is 1 ~ 10.
Preferably, the graphite obstruction is 0 ~ 10mm with the adjustable clearance scope of cone cylinder liner.
The utility model device utilizes churned mechanically method, when alloy melt is flowed through device interior, it is cooled off and applies stirring, when slurry flows from high to low along the cone barrel, because the stirring action of floor, slurry exists along the circular motion of cone barrel, has promoted that its Heterogeneous Nucleation and crystal grain on cone barrel and floor is free; Alloy melt internal temperature field distribution in flow process is substantially even simultaneously, there is not the cold gradient of obvious mistake, destroyed the environment that dendrite generates, thereby be uniform-distribution with the semi solid slurry of a certain proportion of spherical nascent solid phase in the acquisition liquid matrix, the semi solid slurry for preparing directly can be delivered to former by discharging opening, make the semisolid part, also can continuously prepare the semisolid ingot casting.
The utility model has been realized the quick preparation of semi solid slurry, and continuous operation stability is high, is a kind of advanced person's semi-solid-state metal processing unit (plant), and its advantage is:
1, this apparatus structure is compact, and is simple to operate, convenient disassembly.By using different supports with the semi solid slurry outlet as far as possible near former, to save the slurry course of conveying, thereby to realize the integral process process from the making semisolid slurry to the rheological molding.Application prospect is extensive, comprises the non-ferrous alloys such as aluminium alloy, magnesium alloy.
2, in the making semisolid slurry process, alloy melt has sufficient heat convection with the cone barrel, not only played the effect of cold fuse-element along the floor of shaft circle distribution, the simultaneously shear agitation effect of floor, temperature field, the one-tenth another arena of melt are evenly distributed substantially, have destroyed the environment that dendrite generates, the semi solid slurry crystallite dimension of preparation is close, good sphericity, and be evenly distributed.
3, the temperature of teeter chamber, shear strength, the slurry rate of outflow all can be accomplished accurate control, are convenient to the preparation of the semi-solid metal slurry of variety classes, different performance requirement; In addition, in the whipping process, can pass into protective gas, further reduce oxidation, guarantee the quality of semi solid slurry.
4, the part that contacts with alloy melt of this device mostly adopts the high purity graphite material, and graphite guide is hot good, and smooth surface is little with alloy melt affinity, generally can not occur buildup, putty problem in the shear agitation process; If occur, only need teeter chamber's temperature is mentioned the above uniform temperature of liquidus curve, buildup will be melted, be flowed out, and has guaranteed the reliability of the utility model device long time continuous working.
Description of drawings
Fig. 1 is that floor stirs cone cartridge type semi-solid slurry preparation device structural representation;
Among the figure: 1 discharging opening, 2 heating element heaters, 3 cooling elements, 4 stir cooling floor, 5 charging apertures, 6 bearings, 7 gears, 8 shafts, 9 bearing blocks, 10 pads, 11 passages, 12 heat-insulation layers, 13 stainless steel pricker cylinders, 14 cone cylinder liners, the obstruction of 15 graphite.
Fig. 2 is for stirring the schematic cross section of floor.
The specific embodiment
Below in conjunction with example structure of the present utility model and implementation result are described further:
Example 1:
(1) test is 615 ℃ with the liquidus curve of ZL101A aluminium alloy, alloy is melted in crucible electrical resistance furnace, when treating that alloy temperature reaches 720 ℃ of left and right sides, carbon trichloride after will drying with bell jar is pressed into melt lower curtate (addition be aluminium alloy gross weight 0.5%), and swing gently, carry out degasification, the deslagging refining of alloy melt and process, at last the alloy melt temperature is down to 630 ℃ of insulations.
(2) setting the utility model device teeter chamber temperature is 590 ℃, it is 500rad/min that the unlatching buncher makes agitating auger bar rotating speed, graphite stops up and is controlled at certain altitude, after parameter reaches setting value, the aluminium alloy that previous step is melted is poured in the teeter chamber of the utility model device by charging aperture, pour into the alloy amount and be about 3 kilograms, alloy melt flows from the top down along the cone barrel, under the abundant cooling of floor and barrel, the temperature of melt drops to below the liquidus curve, and under the shear agitation effect of floor, nascent nucleus quantity increases and is grown to sphere, and the aluminium alloy of bottom stops up with the slit of liner from graphite and slowly flows out, at this moment, the alloy melt temperature is in semi solid zone, is uniform-distribution with a certain proportion of spherical nascent solid phase in its liquid matrix.
Example 2:
(1) test is 640 ℃ with the liquidus temperature of 7075 aluminium alloys, it is in 400 ℃ the crucible electrical resistance furnace that the aluminium alloy ingot is put into preheat temperature, refining after the aluminium alloy temperature reaches 720 ℃, carbon trichloride after will drying with bell jar is pressed into melt lower curtate (addition be aluminium alloy gross weight 0.5%), and swing gently, carry out degasification, the deslagging refining of alloy melt and process, at last the alloy melt temperature is down to 650 ℃ of insulations.
(2) setting the utility model device teeter chamber temperature is 600 ℃, it is 500rad/min that the unlatching buncher makes agitating auger bar rotating speed, after parameter reaches setting value, the aluminium alloy that previous step is melted continues to be poured in the teeter chamber of the utility model device by charging aperture, pour into each approximately 3 kilograms of alloy amount, totally four times.Pouring into the alloy amount when more, teeter chamber's temperature rises, and temperature control box detects temperature and is higher than design temperature, the breather pipe ventilation, and drop in temperature is to design temperature, and ventilation stops; Alloy melt is uniform-distribution with a certain proportion of nascent solid phase in the alloy melt under the effect of shear agitation and cooling, the semi solid slurry for preparing flows out from discharging opening, enters slurry and collects in the crucible.

Claims (4)

1. a continuous production semi solid slurry materials device is characterized in that: stopped up (15) and formed by discharging opening (1), heating element heater (2), cooling element (3), stirring cooling floor (4), charging aperture (5), bearing (6), gear (7), shaft (8), bearing block (9), pad (10), passage (11), heat-insulation layer (12), stainless steel pricker cylinder (13), a cone cylinder liner (14), graphite; Wherein stainless steel pricker cylinder, cone cylinder liner have consisted of the alloy melt teeter chamber, are tied with heating element heater and cooling element outside the teeter chamber, and there is heat-insulation layer the outside again; Discharging opening is arranged at the bottom of teeter chamber, and charging aperture and passage are arranged at the top; Shaft is arranged in the middle of the teeter chamber, be fixed on the bearing block by bearing, the shaft bottom has several to stir the cooling floor, stirs the disk that cooling floor top is welded with inclination, the shaft bottom is fixed with graphite with bolt and stops up, and shaft is driven by travelling gear by buncher.
2. continuous production semi solid slurry materials device according to claim 1 is characterized in that: the teeter chamber adopts the design of cone cartridge type, and a cone cylinder liner material be graphite or the ceramic material little with alloy melt affinity, cone angular range: α=5~80 °.
3. continuous production semi solid slurry materials device according to claim 1 is characterized in that: puddler adopts along axisymmetric stirring cooling floor, and High Rotation Speed alloy melt stirs under the drive of buncher; Stir the gap of cooling floor and teeter chamber's inwall existence 2~10mm, stirring cooling ribs sheet material matter is steel or pottery, and the quantity that stirs the cooling floor is 1~10.
4. continuous production semi solid slurry materials device according to claim 1 is characterized in that: the adjustable clearance scope that graphite stops up with cone cylinder liner is 0~10mm.
CN 201220493112 2012-09-25 2012-09-25 Device capable of being used for continuously preparing semi-solid slurry Active CN202910263U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102909322A (en) * 2012-09-25 2013-02-06 北京科技大学 Continuous production device for semisolid slurry
CN103521734A (en) * 2013-10-14 2014-01-22 南昌大学 Rotary four-position machine capable of taking and injecting slurry cleanly
CN103590605A (en) * 2013-10-29 2014-02-19 林清辉 Feeding device of heat preservation material coating machine
CN105665654A (en) * 2016-04-06 2016-06-15 上海应用技术学院 Method and device for preparing semi-solid state slurry through intensive cooling stirring
CN106216617A (en) * 2016-09-14 2016-12-14 湖南涉外经济学院 Metal semi-solid slurry preparation facilities
CN106938326A (en) * 2017-05-17 2017-07-11 安徽中鑫压铸技术研发有限公司 Full-automatic air-cooled semi-solid slurrying machine
CN112775420A (en) * 2020-12-28 2021-05-11 湖南文昌新材科技股份有限公司 Rotating device for preparing composite material and preparation method of aluminum-based composite material

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102909322A (en) * 2012-09-25 2013-02-06 北京科技大学 Continuous production device for semisolid slurry
CN102909322B (en) * 2012-09-25 2015-01-07 北京科技大学 Continuous production device for semisolid slurry
CN103521734A (en) * 2013-10-14 2014-01-22 南昌大学 Rotary four-position machine capable of taking and injecting slurry cleanly
CN103521734B (en) * 2013-10-14 2015-08-12 南昌大学 Slip casting machine is got in a kind of rotary four station cleanings
CN103590605A (en) * 2013-10-29 2014-02-19 林清辉 Feeding device of heat preservation material coating machine
CN103590605B (en) * 2013-10-29 2015-07-01 林清辉 Feeding device of heat preservation material coating machine
CN104775601A (en) * 2013-10-29 2015-07-15 林清辉 Feeding device for heat-preservation material sprayer with driving mechanism II
CN104847095A (en) * 2013-10-29 2015-08-19 林清辉 Improved feeding device of thermal insulation material coating machine
CN105665654A (en) * 2016-04-06 2016-06-15 上海应用技术学院 Method and device for preparing semi-solid state slurry through intensive cooling stirring
CN106216617A (en) * 2016-09-14 2016-12-14 湖南涉外经济学院 Metal semi-solid slurry preparation facilities
CN106216617B (en) * 2016-09-14 2018-04-17 湖南涉外经济学院 Metal semi-solid slurry preparation facilities
CN106938326A (en) * 2017-05-17 2017-07-11 安徽中鑫压铸技术研发有限公司 Full-automatic air-cooled semi-solid slurrying machine
CN106938326B (en) * 2017-05-17 2019-11-12 安徽中鑫压铸技术研发有限公司 Full-automatic air-cooled semi-solid slurrying machine
CN112775420A (en) * 2020-12-28 2021-05-11 湖南文昌新材科技股份有限公司 Rotating device for preparing composite material and preparation method of aluminum-based composite material

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