CN105772661A - Quick alloy solidification equipment and quick alloy solidification method using same - Google Patents
Quick alloy solidification equipment and quick alloy solidification method using same Download PDFInfo
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- CN105772661A CN105772661A CN201410830156.2A CN201410830156A CN105772661A CN 105772661 A CN105772661 A CN 105772661A CN 201410830156 A CN201410830156 A CN 201410830156A CN 105772661 A CN105772661 A CN 105772661A
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Abstract
The invention provides quick alloy solidification equipment. The quick alloy solidification equipment comprises a furnace body, an induction coil, a crucible, a tundish with the bottom being connected with a nozzle, a cooling device and a control center. The crucible is located inside the induction coil and fixedly connected with the induction coil. The induction coil can rotate around a horizontal shaft under the action of a rotating device. The tundish is installed in an impending mode through a supporting device, and the supporting device is provided with a weight sensor. In an operating state, the tundish and alloy liquid in the tundish generate pressure on the supporting device under the gravity action, the pressure signal is detected and sent to the control center through the gravity sensor and is compared with the preset reference value through the control center, so that a rotating device is controlled; thus, the dumping angle of the crucible is adjusted, so that the amount of the alloy liquid poured within unit time is kept stable; and therefore, the whole quick solidification process is in a relative balanced state, and the performance consistency and the quality of products in the manufacturing process are improved.
Description
Technical field
The present invention relates to the technical field of metallurgical equipment making molten metal alloy rapid solidification, particularly relate to a kind of alloy rapid solidification equipment and the method utilizing this equipment to carry out alloy rapid solidification.
Background technology
The manufacturing process of metal alloy generally includes the processes such as component proportion, melting, solidification, heat treatment.Specifically, including by the element such as metal (such as ferrum, copper, nickel etc.) and nonmetal (such as carbon, boron) of two or more according to certain ingredients proportioning, at high temperature it is fused into liquid, then through nature or forced cooling process, is frozen into block or other shapes of goods.Wherein, solidification refer to metal alloy by liquid to solid state transformation, be a kind of phase transition process.As a rule, metal freezing is the generation of crystal or crystal grain and the process grown up.It addition, metal solidification process is accompanied by the phenomenons such as change in volume, gas precipitation and element segregation, therefore this process not only determines the structure of alloy, tissue and performance, but also affects plastic working and the heat treatment in later stage.
For ease of manufacturing all kinds of difform electronically or mechanically element, except the minority techniques such as casting, major part bulk metal first has to be ground into the shapes such as granule, band or thin slice, then through process molding such as sintering or bondings, is finally processed into required electronically or mechanically element.About the method that bulk metal is broken into granule, early stage adopts simple mechanical crushing method, but the residual stress that this method is brought is very big, and it is difficult to ensure that epigranular；The airflow milling that developed the ball milling adding steel ball and liquid medium later, utilizes high pressure draught that material is clashed into mutually, for methods such as the suction hydrogen of rare earth alloy are broken.Wherein, fast melt-quenching technology is adopted to be ejected on the rotation roulette of water-cooled by the aluminium alloy of molten condition, it is possible to obtain the alloy of the shapes such as granule, band or thin slice easily.Being additionally, since this method and have high rate of cooling (about 1,000,000 degree per second), can obtain the amorphous metal that slow cooling process cannot be prepared, such material is dramatically different and amorphous metal at electromagnetic performance and mechanical properties.Difference according to composition and purposes, it is possible to mainly have with the functional material of melt-quenching method manufacture: as the rare earth alloy containing neodymium or praseodymium of permanent magnet material, bismuth system alloy as thermoelectric material, the chromiumcopper as switch contact material, the iron-nickel alloy as soft magnetic materials, magnesium alloy etc. as structural material.
According to the difference of oxidation resistance, the melting of alloy selects to carry out in air, inert atmosphere protection or vacuum, and as copper alloy or nickel alloy can in atmosphere, and rare earth alloy, magnesium alloy etc. must in the smelting furnaces of vacuum or inert atmosphere protection.Except alloying component, the cooling rotary speed of wheel disc, alloy liquid stream the technological parameter such as flow velocity all can affect form and the performance of alloy powder.
The Chinese invention patent " vacuum quick quenching furnace " that the patent No. is ZL92105431.9 discloses a kind of device manufacturing metal dust with chill roll.It comprises vaccum case, smelting furnace, nozzle bag, nozzle, fast quenching roller, and moves and controlling organization for the nozzle bag of spacing between moving nozzle bag and adjustment nozzle and fast quenching roller, and furnace shell is divided into fixing and moveable two parts.
The patent No. is the preparation method that the Chinese invention patent " preparation method of a kind of anisotropy complex phase rare earth permanent magnetism rapid tempering belt " of ZL200810060511.7 discloses a kind of anisotropy complex phase rare earth permanent magnetism rapid tempering belt, the solid solution of one layer of cobalt with (0002) plane texture or cobalt, the Hard Magnetic phase R of complex phase rare earth permanent magnetism material is formed at roll surface2T14M orientation of easy magnetization axis in fast quenching process of setting is subject to the induction with texture roll surface.
The Chinese invention patent " induction overflow quick quenching technique and equipment " that publication number is CN101722311A discloses a kind of induction overflow quick-quenching method for producing fast quenching NdFeB magnetic powder and equipment, adopt Frequency Induction Heating, raw material or Nd Fe B alloys ingot are fused into aluminium alloy, then it is poured over certain speed in the tundish of a particular design, alloy is taken turns by the water-cooled molybdenum of the overfall of tundish a to high speed rotating or on copper wheel, rapidly cools to form neodymium iron boron fast quenching thin strap.
The Chinese invention patent " vacuum smelting fast solidification stove " that publication number is CN1517659A discloses a kind of for producing permanent-magnet rare-earth NdFeB alloy material and the vacuum smelting fast solidification stove of rare earth hydrogen storage alloy material, including vacuum system, vacuum furnace shell, induction heater coils, crucible, tundish and runner, the runner side that it is characterized in that in vacuum furnace shell is provided with cylinder, cylinder outer wall cladding chiller.
Equipment involved by above-mentioned patent or technique are all by melted aluminium alloy injection or be poured into chill roll and carry out rapid solidification, the expulsion pressure of aluminium alloy, topple over speed, and the parameter such as the linear velocity of chill roll can regulate.
It is noted that the aluminium alloy temperature of molten condition is significantly high, for instance ferrous alloy fusing point is at about 1500 degree, and namely the moment of contact cooling roller releases huge heat.One of key parameter of rapidly solidified alloy quality is rate of cooling, its with aluminium alloy temperature, aluminium alloy closely related to factors such as the distance of chill roll, chill roll surface temperature, chill roll rotary speed, aluminium alloy poring rates.Wherein, first few items factor is easily controlled, and aluminium alloy temperature is maintained near fusing point such as by the detection of thermoelectricity occasionally infrared radiation thermometer；The tundish that can pass through different structure and size adjusts the aluminium alloy distance to chill roll,；Chill roll surface temperature can be regulated by the cooling water temperature passed into；The electric rotating machine that can pass through to be attached thereto regulates chill roll rotary speed etc..But, to accurately control aluminium alloy poring rate highly difficult.
For small-sized alloy rapid solidification equipment, the alloy of melting once only has more than ten gram or at most several kilograms, owing to alloy density big (if ferroalloy density is more than 7 grams every cubic centimetre) event volume is little, the time of the cast of corresponding aluminium alloy or injection only has several seconds or at most one or two minutes, and now the poring rate of aluminium alloy is little on the impact of product properties.But for alloy rapid solidification equipment large-scale, batch micro operations purposes, due to the alloy mass of melting huge (such as 100 kilograms even 1 ton), in this case, the aluminium alloy cast of single heat or injecting time just can extend several tens minutes.If adopting continuous feeding and discharging to design again, corresponding injecting time was likely to especially up to a few hours or more.Therefore, control aluminium alloy poring rate particularly important, be otherwise easy for occurring that the alloy powder cooling effect of leading portion in casting process, stage casing and back segment differs, affect concordance and the stability of batches performance.
Alloy melting generally carries out in crucible, and its structure is the cup-shaped end of with or bowl-shape.Fluence is watered by the poring rate of dump angle control aluminium alloy and the aluminium alloy in the unit interval regulating crucible.The frame for movement being connected with crucible can adopt the hydraulic stem driven by proportional hydraulic valve or by motor-driven gear.Controlling part and generally adopt PID regulator or programmable controller, crucible entirety dump angle (0 to 90 degree) is divided into some sections, every section has corresponding angle on target and transformation period, thus progressively being poured out by the aluminium alloy in crucible.The process of alloy liquid monotone increasing or minimizing, this control mode is relatively more effective, if but aluminium alloy change is more complicated, and sum up only by test of many times, divide more segmentation and adapt to, but still cannot realize real-time monitoring.
This toppling over further difficulty is that of mode, in the unit interval, the flow of aluminium alloy is not only relevant with the dump angle of crucible, also relevant to the liquid level of aluminium alloy in crucible.When liquid level is in a high position, crucible dump angle is little can flow out；When liquid level is in low level, crucible dump angle is big could flow out, and is not therebetween simple linear relationship.Along with pouring out of aluminium alloy, in crucible, the liquid level of aluminium alloy is in variable condition.For single heat situation of alloy raw material mass conservation, alloy liquid level high visibility is for progressively to decline；But the situations such as or continuous charging reinforced for midway, then alloy liquid level height change is more complicated, and the dump angle of crucible needs real-time monitoring, therefore, will maintain that whole to topple over the poring rate of aluminium alloy in the stage stable, control more complicated.
Summary of the invention
The technical purpose of the present invention is for above-mentioned the deficiencies in the prior art, it is provided that a kind of alloy rapid solidification equipment, utilizes this equipment can control aluminium alloy and is cast on chiller with stable speed, thus obtaining the alloy product of uniform quality, stable performance.
The present invention realizes the technical scheme that above-mentioned technical purpose adopts: a kind of alloy rapid solidification equipment, the tundish of nozzle and cooling roller device is connected including body of heater, induction coil, crucible, bottom, alloy in crucible melts inflow tundish after into liquid under induction coil effect, is cast on cooling roller device through nozzle and solidifies；It is characterized in that:
Described crucible is positioned at inside induction coil, and fixing with induction coil is connected；Described induction coil connects tumbler, and this tumbler is used for making induction coil around horizontal axis, drives crucible to topple over, and aluminium alloy flows out；
Described tundish is by a unsettled installation of support arrangement, and a described support arrangement includes support and support bar, and support bar one end is connected with support, and the other end is used for support crucible, makes crucible unsettled fixing；Arranging weight sensor on support, they are between the two ends of support bar, and contact with support bar；
Described alloy rapid solidification equipment also includes control centre；
During duty, support bar is produced pressure with the aluminium alloy in tundish by tundish under gravity, weight sensor detects this pressure signal and is sent to control centre, and it is compared by control centre with the reference value set, to control tumbler.
As a kind of implementation, described tumbler is called " gear train " formula, and mainly by driving gear, driven gear and connecting rod form；Connecting rod one end is connected with induction coil, and the other end is connected with driven gear；Under electric rotating machine drives, driving gear rotates, and drives driven gear to rotate, and connecting rod concomitant rotation, so that induction coil rotates.
As another kind of implementation, described tumbler is called " worm and gear " formula, and mainly by active worm screw, driven worm gear and connecting rod form；Connecting rod one end is connected with induction coil, and the other end is connected with driven worm gear；Actively the slot form of worm screw and driven worm gear match, and under electric rotating machine drives, actively worm screw carries out straight line or rotational motion, drives driven worm gear wheel, and connecting rod concomitant rotation, so that induction coil rotates.
As another kind of implementation, described tumbler is called " spin axis " formula, is mainly made up of spin axis device and connecting rod；Connecting rod one end is connected with induction coil, and the other end is connected with spin axis device；Spin axis device carries out axial rotation under external force, and drivening rod rotates, so that induction coil rotates.As preferably, described spin axis device is connected with hydraulic stem, hydraulic stem lift under external force drives, and drives spin axis device to carry out axial rotation.
Described weight sensor is not limit, it is possible to adopt resistance-strain type, condenser type, photo-electric, fluid pressure type etc..
As preferably, arranging heater outside described tundish, for heating the aluminium alloy in tundish.Described heater can adopt the mode such as induction coil or resistance heater cladding to heat.
As preferably, described alloy rapid solidification equipment also sets up liquid level sensor, for detecting the alloy liquid level in tundish, and this testing result is sent to control centre, it is compared by control centre with the reference liquid level set, according to comparative result: the actual height of alloy liquid level exceedes or this reference liquid level not enough, control centre will regulate and control tumbler, to reduce or to increase the induction coil rotational angle around trunnion axis, namely reduce or increase the dump angle of crucible, thus reducing or increase the discharge of aluminium alloy.When adopting this preferred measure to be prevented from weight sensor operational failure, this alloy rapid solidification equipment remains able to normal operation.Described liquid level sensor kind is not limit, the one in including electromagnetic induction, radiation source, photoelectric sensor etc..
As preferably, described alloy rapid solidification equipment also includes vacuum extractor, for body of heater evacuation.Described vacuum extractor includes vacuum machine, and this vacuum machine is connected with furnace shell by pipeline, including mechanical pump, lobe pump, diffusion pump etc..As preferably, described vacuum extractor also includes transfer chamber, and this transfer chamber volume is less than body of heater volume, and including interior hatchcover and outer hatchcover, outer hatchcover is connected with the external world when opening, and interior hatchcover is connected with body of heater when opening；Vacuum machine is connected with transfer chamber by pipeline, the vent valve of the extraction valve of body of heater, the vent valve of body of heater, the extraction valve of transfer chamber and transfer chamber all can independent opening and closing, when body of heater is identical with the air pressure of transfer chamber, the interior hatchcover of transfer chamber is opened.
As preferably, described alloy rapid solidification equipment also includes collection device, for collecting the alloy powder that solidification is splashed down.In order to be cooled down further by the alloy powder splashed down, collection device preferably includes takes advantage of charging tray, stirring blade and fan etc., described takes advantage of charging tray to be preferably to take advantage of charging tray with cold water jacket.It is highly preferred that described collection device also includes at least one piezoelectric transducer, it is converted into the signal of telecommunication is sent to control centre for alloy powder being fallen into quality (pressure) change brought.
Described material is preferably ordinary carbon steel or rustless steel etc..Consider heat radiation, furnace shell can be designed as double-decker, be provided with water-cooled jacket set, or the copper pipe disk of employing hollow water flowing is around being welded on furnace shell top etc..
As preferably, described tundish and nozzle all adopt resistant to elevated temperatures ceramic material.
As preferably, adopting high-temperature ceramics binding agent by closely coupled to described tundish and nozzle.
As preferably, described cooling roller device includes chill roll, runner motor and mechanical fastener etc..Chill roll is metal material, and inner hollow passes into cooling medium, and cooling medium is not limit, including water or wet goods.Runner motor adopts converter or servo-driver etc., and rotating speed is adjustable.
As preferably, the rotational angle of described induction coil is 0-90 degree.
The process that alloy rapid solidification equipment of the present invention carries out alloy rapid solidification is adopted to comprise the steps:
Step 1: the raw material prepared or alloy pig are loaded crucible；As preferably, by vacuum extractor, body of heater being carried out evacuation；
Step 2: induction coil electrified regulation, after arriving design temperature, runner driven by motor chill roll starts to rotate；Under tumbler effect, induction coil rotates, and makes crucible tilt, and aluminium alloy begins to flow into tundish；
Step 3: when the alloy liquid level in tundish reach a certain height, under gravity, aluminium alloy flows out from nozzle, weight sensor detects the weight signal of aluminium alloy in tundish and tundish and is sent to control centre, it is compared by control centre with the reference signal value set, to control tumbler, such as, when this output signal value is more than reference signal value, aluminium alloy dump angle is too fast, otherwise then aluminium alloy flip angle is spent slowly, regulates the dump angle of crucible in real time from there through drive motor；
Being set as of described reference signal value: set the calibrated altitude scope of aluminium alloy in tundish, when the actual height of aluminium alloy reaches this calibrated altitude, the weight of the aluminium alloy in tundish and tundish causes that one end of support bar is applied with certain pressure to weight sensor, weight sensor detects this pressure signal and is sent to control centre, and this signal value is reference signal value.
In sum, alloy rapid solidification equipment provided by the invention can adjust crucible dump angle according to aluminium alloy weight in tundish, by changing the dump angle of crucible in real time, the alloy liquid measure of cast in the unit interval is made to remain stable for, therefore whole rapid solidification is in the state of relative equilibrium, thus improve concordance and the quality of properties of product in manufacture process.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of alloy rapid solidification equipment in the embodiment of the present invention 1；
Fig. 2 is the tundish structure schematic diagram of alloy rapid solidification equipment in the embodiment of the present invention 1；
Fig. 3 is the vacuum extractor structural representation of alloy rapid solidification equipment in the embodiment of the present invention 1；
Fig. 4 is the tumbler structural representation of alloy rapid solidification equipment in the embodiment of the present invention 1；
Fig. 5 is the tumbler structural representation of alloy rapid solidification equipment in the embodiment of the present invention 2；
Fig. 6 is the tumbler structural representation of alloy rapid solidification equipment in the embodiment of the present invention 3.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail, but should not limit the scope of the invention with this.
Accompanying drawing in Fig. 1 to Fig. 6 is labeled as: body of heater 1, charging aperture 2, discharging opening 3, evacuation unit 4, crucible 5, induction coil 6, tundish 7, heater 8, nozzle 9, liquid level sensor 10, material bearing disc 11, blade 12, water inlet 13, outlet 14, chill roll 15, electrical control cabinet 16, heating power supply 17, support bar 18, support 19, weight sensor 20, transfer chamber 21, outer end cap 22, inner end cap 23, the extraction valve 24 of transfer chamber, the extraction valve 25 of body of heater, the vent valve 26 of transfer chamber, the vent valve 27 of body of heater, magnetic fluid movable sealing 28, coil connecting rod 29, driven gear 30, Timing Belt 31, driving gear 32, driven worm gear 33, actively worm screw 34, spin axis device 35, hydraulic stem 36.
Embodiment 1:
In the present embodiment, overall structure and the critical piece of alloy rapid solidification equipment are as it is shown in figure 1, mainly include body of heater 1, induction coil 6, crucible 5, tundish 7, nozzle 9, cooling roller device and control centre.
Body of heater 1 loads its internal mechanical part for fixing, and is isolated with external environment such as empty gas and water etc. by these parts.Material is ordinary carbon steel or rustless steel.Body of heater 1 is provided above charging aperture 2, is arranged below discharging opening 3.Charging aperture 2 is for loading the raw material or alloy pig that prepare.Discharging opening 3 is for exporting the alloy powder after rapid solidification processes.Charging aperture 2 and discharging opening 3 can connect material transfer chamber further so that equipment becomes continuous operation operating from single heat startup-shutdown.
Cooling roller device includes chill roll 15, runner motor and mechanical fastener etc..Chill roll 15 is metal material, and inner hollow passes into cooling medium, and cooling medium is not limit, including water or wet goods.Runner motor adopts converter or servo-driver etc., and rotating speed is adjustable.
Crucible 5 is the cylindrical shape end of with, and material adopts the one in aluminium oxide, magnesium oxide, carborundum or quartz.Induction coil 6 is the hollow water-cooled copper pipe of dish curl, and the two ends (both positive and negative polarity) of copper pipe connect heating power supply 17 through body of heater 1, and the sealing between itself and body of heater 1 adopts magnetic fluid movable sealing, and therefore induction coil 6 is unlikely to gas leakage when rotating.The internal diameter of induction coil 6 is more bigger than the external diameter of crucible 5, it is internal that crucible 5 is positioned at induction coil 6, and adopt the material such as magnesia, Calx induction coil 6 and crucible 5 to be fixed together, thus crucible 5 is toppled over therewith when induction coil 6 is around horizontal axis, aluminium alloy melted in crucible 5 flows out.In order to when crucible 5 is toppled over, aluminium alloy can accurately fall into tundish 7, tundish 7 can do funnel.The material of tundish 7 adopts the one in carborundum, aluminium oxide, boron nitride and magnesium oxide.Nozzle 9 is connected bottom tundish 7.The material of nozzle 9 is the one in quartz, aluminium oxide, aluminium oxide and boron nitride.Adopt ceramic glue bonding between nozzle 9 and tundish 7, form through high temperature sintering.
The outside of nozzle 9 and tundish 7 arranges heater 8, it is simple to play auxiliary heat effect to falling into aluminium alloy therein.Heater 8 can adopt the mode of induction coil or resistance heater cladding to heat.
Material bearing disc 11, for accepting the alloy powder splashed down after chill roll 15 rapid solidification, is then come out of the stove from discharging opening 3.Blade 12 is loaded in the top of material bearing disc 11 and can rotate under driven by motor, and each blade is uniformly arranged in pairs, such as two pairs, three equities, is used for stirring alloy powder, makes alloy powder be evenly distributed on material bearing disc 11 on the one hand, be unlikely to enrichment and pile up；Promote the heat radiation of alloy powder on the other hand.In order to promote the heat radiation of alloy powder further, it is also possible to arrange fan coolling alloy powder, it is also possible to carrier 11 is designed as the double-decker with water-cooling jacket, in Fig. 1, water-cooling jacket includes water inlet 13 and outlet 14).Fig. 2 show the structural representation of the tundish 7 of the present embodiment alloy rapid solidification equipment.
Support 19 is fixed on the bottom position of body of heater 1.Support bar 18 one end connects support heater 8, and the other end is connected with support 19.Tundish 7 and nozzle 9 are placed in the inside of heater 8, and under the support of support bar 18, crucible is unsettled fixing.Heater 8 is used for heating tundish 7 and nozzle 9, and by outside automatically controlled and temp measuring system, the two can be heated to 500～800 degree by heater 8.Arranging weight sensor 20 on support 19, they are between the two ends of support bar 18, and contact with support bar 18.
When crucible 5 is toward before pouring aluminium alloy in tundish 7, owing to tundish 7, nozzle 9 and heater 8 have certain weight (i.e. initial weight), as schemed the structure of unsettled setting, the one end causing support bar 18 is applied with certain pressure to corresponding weight sensor 20, now weight sensor 20 detects this pressure signal and is sent to control centre, and this signal value is initial reference signal value.
Induction coil 6 connects tumbler, and this tumbler is used for making induction coil 6 around horizontal axis, drives crucible 5 to topple over, and aluminium alloy flows out.In this enforcement, as shown in Figure 4, mainly by driving gear 32, driven gear 30, coil connecting rod 29 and electric rotating machine form tumbler structural representation.Coil connecting rod 29 one end is connected with induction coil 6, and the other end is connected with driven gear 30 by magnetic fluid movable sealing 28.Driving gear 32 is driven by electric rotating machine, drives driven gear 30, coil connecting rod 29 concomitant rotation again through connected Timing Belt 31, thus driving induction coil 6 around horizontal axis, crucible 5 is toppled over, and pours out aluminium alloy therein.
In the present embodiment, alloy rapid solidification equipment also sets up vacuum extractor, in order to the alloy that smelting solidification is oxidizable.This vacuum extractor includes evacuation unit 4 and transfer chamber 21, is illustrated in figure 3 transfer chamber 21 and the exhaust pipe schematic diagram of this alloy rapid solidification equipment.
Evacuation unit 4 is made up of mechanical pump, lobe pump and diffusion pump, each other by placed in series.The exhaust capacity of each pump is relevant with the volume of furnace shell 1.When having only to the vacuum of about 100Pa, individually open mechanical pump；Lobe pump only can use when mechanical pump is opened, for improving the speed bled；When needing the vacuum of below 1Pa, it is necessary to open diffusion pump.The exhaust pipe of body of heater 1 and transfer chamber 21 is linked to evacuation unit 4 by same pipeline.The vent valve 26 of the extraction valve 25 of body of heater 1, the vent valve 27 of body of heater 1, the extraction valve 24 of transfer chamber 21 and transfer chamber 21 all can independent opening and closing, so when body of heater 1 is identical with the air pressure of transfer chamber 21, the interior hatchcover 23 of transfer chamber 21 can be opened.
Adopt the process that this alloy rapid solidification equipment carries out alloy rapid solidification as follows:
Step 1: open the charge door 2 above body of heater 1, loads crucible 5 by the raw material prepared or alloy pig, opens vacuum pump unit 4 evacuation, when arriving the vacuum of about 100Pa, be filled with a small amount of argon；When the non-oxidizable rare earth alloy of melting or magnesium alloy etc., it is possible to save the pumping process of vacuum pump unit 4；
Step 2: the temperature control instrument in electrical control cabinet 16, according to the temperature program(me) set, controls induction coil 6 and heater 8 electrified regulation, after arriving design temperature, runner driven by motor chill roll 15 starts to rotate；Under tumbler effect, induction coil 6 rotates, and makes crucible 5 tilt, and aluminium alloy begins to flow into tundish 7；
Step 3: when the alloy liquid level in tundish 7 reach a certain height, under gravity, a part of aluminium alloy starts to flow out from nozzle 8, the aluminium alloy not yet flowed out adds the weight of tundish 7, weight sensor 20 detects this weight signal and is sent to control centre, it is compared by control centre with the reference signal value set, to control tumbler.Such as, when when this output signal value is more than reference signal value, aluminium alloy dump angle is too fast, otherwise then aluminium alloy flip angle is spent slowly, regulates the dump angle of crucible in real time from there through drive motor.
Being set as of described reference signal value: when the aluminium alloy height in tundish 7 reaches a calibrated altitude, owing to the aluminium alloy in tundish 7, nozzle 9, heater 8 and tundish 7 has certain weight, the one end causing support bar 18 is applied with certain pressure to corresponding weight sensor 20, now weight sensor 20 detects this pressure signal and is sent to control centre, and this signal value is reference signal value.
In the present embodiment, alloy rapid solidification equipment can also arrange liquid level sensor 10, for detecting the alloy liquid level in tundish 7, and this testing result is sent to control centre, it is compared by control centre with the reference liquid level set, according to comparative result: the actual height of alloy liquid level exceedes or this reference liquid level not enough, control centre will regulate and control tumbler, to reduce or to increase the induction coil rotational angle around trunnion axis, namely reduce or increase the dump angle of crucible, thus reducing or increase the discharge of aluminium alloy.When adopting this preferred measure to be prevented from weight sensor 20 operational failure, this alloy rapid solidification equipment remains able to normal operation.Liquid level sensor 10 can adopt the detection modes such as electromagnetic induction, radioactive source and photoelectric effect.
When arranging this liquid level sensor 10, the process of above-mentioned alloy rapid solidification also comprises the steps 4: step 4: liquid level sensor 15 detects alloy liquid level all the time and is sent to control centre, it is compared by control centre with the reference altitude value set, to control tumbler, when being increased beyond this reference altitude value when alloy liquid level, control centre will control tumbler.Such as, when this detection height value is more than reference signal value, aluminium alloy dump angle is too fast, otherwise then aluminium alloy flip angle is spent slowly, regulates the dump angle of crucible in real time from there through drive motor.
The program that above step all can pass through programmable controller prepared in advance is sequentially run, and whole process is without manual intervention.It addition, install transfer chamber 21 and attached exhaust pipe additional at charge door 2 and discharging opening 3, it is possible to achieve the reinforced and discharging process of serialization, improve production efficiency further
Embodiment 2:
In the present embodiment, alloy rapid solidification equipment is substantially the same manner as Example 1, institute the difference is that, in this enforcements rotation apparatus structure schematic diagram as it is shown in figure 5, be mainly made up of active worm screw 34, driven worm gear 33, coil connecting rod 29 and electric rotating machine；Coil connecting rod 29 one end is connected with induction coil 6, and the other end is connected with driven worm gear 33 by magnetic fluid movable sealing 28；Actively the slot form of worm screw 34 and driven worm gear 33 match, under electric rotating machine drives, actively worm screw 34 carries out straight line or rotational motion, driven worm gear 33 is driven to rotate, coil connecting rod 29 concomitant rotation, thus driving induction coil 6 around horizontal axis, crucible 5 is toppled over, and pours out aluminium alloy therein.
Embodiment 3:
In the present embodiment, alloy rapid solidification equipment is substantially the same manner as Example 1, institute the difference is that, in this enforcements rotation apparatus structure schematic diagram as shown in Figure 6, be mainly made up of spin axis device 35, coil connecting rod 29；Coil connecting rod 29 one end is connected with induction coil 6, and the other end is connected with spin axis device 35 by magnetic fluid movable sealing 28；Spin axis device 35 is connected with hydraulic stem 36, the Hydraulic Station being made up of reversal valve, proportional hydraulic valve, oil pressure pump etc. provides driving force to hydraulic stem 36, hydraulic stem 36 lifts, drive spin axis device 35 axial-rotation, coil connecting rod 29 concomitant rotation, thus driving induction coil 6 around horizontal axis, crucible 5 is toppled over, and pours out aluminium alloy therein.
The specific embodiment of the present invention is described by above-mentioned word, it must be noted that, the content that the present invention comprises is not limited thereto, under the premise without departing from essential scope of the present invention, can doing various amendment, replacement and change, these equivalents also belong to the restriction scope of claims of the present invention.
Claims (10)
1. an alloy rapid solidification equipment, the tundish of nozzle and cooling roller device is connected including body of heater, induction coil, crucible, bottom, alloy in crucible melts inflow tundish after into liquid under induction coil effect, is cast on cooling roller device through nozzle and solidifies；It is characterized in that:
Described crucible is positioned at inside induction coil, and fixing with induction coil is connected；Described induction coil connects tumbler, and this tumbler is used for making induction coil around horizontal axis, drives crucible to topple over, and aluminium alloy flows out；
Described tundish is by a unsettled installation of support arrangement, and a described support arrangement includes support and support bar, and support bar one end is connected with support, and the other end is used for support crucible, makes crucible unsettled fixing；Arranging weight sensor on support, they are between the two ends of support bar, and contact with support bar；
Described alloy rapid solidification equipment also includes control centre；
During duty, support bar is produced pressure with the aluminium alloy in tundish by tundish under gravity, weight sensor detects this pressure signal and is sent to control centre, and it is compared by control centre with the reference value set, to control tumbler.
2. alloy rapid solidification equipment as claimed in claim 1, is characterized in that: described tumbler is mainly made up of driving gear, driven gear, connecting rod and electric rotating machine；Connecting rod one end is connected with induction coil, and the other end is connected with driven gear；Under electric rotating machine drives, driving gear rotates, and drives driven gear to rotate, and connecting rod concomitant rotation, so that induction coil rotates.
3. alloy rapid solidification equipment as claimed in claim 1, is characterized in that: described tumbler is mainly made up of active worm screw, driven worm gear, connecting rod and electric rotating machine；Connecting rod one end is connected with induction coil, and the other end is connected with driven worm gear；Actively the slot form of worm screw and driven worm gear match, and under electric rotating machine drives, actively worm screw carries out straight line or rotational motion, drives driven worm gear wheel, and connecting rod concomitant rotation, so that induction coil rotates.
4. alloy rapid solidification equipment as claimed in claim 1, is characterized in that: described tumbler is mainly made up of spin axis device and connecting rod；Connecting rod one end is connected with induction coil, and the other end is connected with spin axis device；Spin axis device carries out axial rotation under external force, and drivening rod rotates, so that induction coil rotates.
5. alloy rapid solidification equipment as claimed in claim 1, is characterized in that: described weight sensor adopts resistance-strain type, condenser type, photo-electric or fluid pressure type.
6. alloy rapid solidification equipment as claimed in claim 1, is characterized in that: arrange heater outside described tundish.
7. alloy rapid solidification equipment as claimed in claim 1, is characterized in that: also set up liquid level sensor, for detecting the alloy liquid level in tundish, and this testing result is sent to control centre.
8. alloy rapid solidification equipment as claimed in claim 1, is characterized in that: also include vacuum extractor.
9. alloy rapid solidification equipment as claimed in claim 1, is characterized in that: the rotational angle of described induction coil is 0-90 degree.
10. the method utilizing in claim 1 to 9 the alloy rapid solidification equipment described in any claim to carry out alloy rapid solidification, is characterized in that: comprise the steps: to adopt the process that alloy rapid solidification equipment of the present invention carries out alloy rapid solidification to comprise the steps:
Step 1: the alloy raw material prepared or alloy pig are loaded crucible；
Step 2: induction coil electrified regulation, after arriving design temperature, runner driven by motor chill roll starts to rotate；Under tumbler effect, induction coil rotates, and makes crucible tilt, and aluminium alloy begins to flow into tundish；
Step 3: when the alloy liquid level in tundish reach a certain height, under gravity, aluminium alloy flows out from nozzle, weight sensor detects the weight signal of aluminium alloy in tundish and tundish and is sent to control centre, it is compared by control centre with the reference signal value set, to control tumbler；
Being set as of described reference signal value: set the calibrated altitude scope of aluminium alloy in tundish, when the actual height of aluminium alloy reaches this calibrated altitude, the weight of the aluminium alloy in tundish and tundish causes that one end of support bar is applied with certain pressure to weight sensor, weight sensor detects this pressure signal and is sent to control centre, and this signal value is reference signal value.
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