CN109877299A - One kind getting rid of casting device and gets rid of casting centrifugal pan - Google Patents
One kind getting rid of casting device and gets rid of casting centrifugal pan Download PDFInfo
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- CN109877299A CN109877299A CN201910304855.6A CN201910304855A CN109877299A CN 109877299 A CN109877299 A CN 109877299A CN 201910304855 A CN201910304855 A CN 201910304855A CN 109877299 A CN109877299 A CN 109877299A
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Abstract
Casting device is got rid of the present invention relates to one kind and gets rid of casting centrifugal pan.One kind getting rid of casting device, including fixed frame, fixed frame is equipped with the crucible for containing the raw metal of molten condition, there is centrifugal pan below crucible, raw metal is atomized and is thrown away by centrifugal pan high speed rotation, and it is attached to cylindrical die inner wall, cooling medium runner is additionally provided on centrifugal pan, cooling medium can cool down the disk of disk body.Centrifugal pan cooling medium runner in centrifugal pan is passed through cooling medium and cools down to disk, when in diversion pipe bet to centrifugal pan of the raw metal by crucible bottom, heat exchange occurs with disk, reduce the heat of raw metal, it can cool down faster, raw metal can smoothly form the droplet of semisolid during throwing away, avoid atomizing particle still keeps the drop on liquid and mold mutually to fuse sample slump phenomenon caused by flowing when colliding with cylindrical die inner wall, make the plant for metal hollow ingot surfacing produced, thickness is uniform, with lesser crystal grain.
Description
Technical field
Casting device is got rid of the invention belongs to advanced metal material processing field shaping technique more particularly to one kind and gets rid of casting centrifugation
Disk.
Background technique
In recent years, with industrial expansions such as China's oil, chemical industry, nuclear power, thermoelectricitys, energy development and utilization efficiency are more next
Higher, the volume of resource equipment is also increasing, and the requirement to the performance and size of the hollow forging in resource equipment is also continuous
It improves.Such as nuclear reactor pressure container and petrochemical industry hydrogenator etc. " large-scale cylindrical member ", main nuclear power pipeline and ultra supercritical
Thermoelectricity main steam line etc. " heavy caliber thick wall alloy pipe ", fired power generating unit turbine generator guard ring and core main pump bearing ring
Deng the key core component that " middle-size and small-size annular element " is in these resource equipments；These key core components all pass through hollow forging
Processing obtains, service life and operational safety of the quality level of hollow forging concerning resource equipment, in addition to requiring preferably
Ambient temperature mechanical properties outside, also require to have certain high-temperature behavior, cryogenic property, creep strength, low temper brittleness tendency, anti-
Corrosive power and radiation resistance etc..The sky produced by processes such as the heating of conventional metals solid ingot, jumping-up, punching, reamings
Heart forging can no longer meet current demand, and cost is also relatively high.
The production of present hollow forging mostly passes through plant for metal hollow ingot and is produced, the production method of plant for metal hollow ingot have from
Add inner core casting, centreless casting etc. in heart casting, fixed ingot mould.Wherein centre spinning mainly passes through mold master
The high speed rotation of body makes the raw metal of the molten condition in die main body closely be fitted in mold under the action of centripetal force
Inner wall, but hollow forging coarse grains obtained by centre spinning, while can also go out during high-speed rotation
Existing segregation phenomena, the process of centrifugal casting are the flowings by liquid, and melt can also make blank shrinkage porosite and contracting occur in solidification
The defect in hole influences the quality of hollow forging.
In the Chinese invention application that application publication number is CN1300871A, a kind of centrifugal atomizing jet deposition dress is disclosed
It sets, is used to prepare bimetallic joint product, which includes fixed frame, is provided with and is accepted in crucible in molten on fixed frame
The funnel of the raw metal of state, lower portion are connected on the centrifugal pan below the raw metal water conservancy diversion to funnel by molten condition
Diversion pipe, centrifugal pan have accept raw metal disk body and drive the high-speed rotating connection shaft of centrifugal pan, molten
The raw metal of state falls in high-speed rotating centrifugal pan and is atomized and throws away along the rotation direction of centrifugal pan, the raw metal after atomization
It is attached on the inner wall of the ring-shaped work pieces of centrifugal pan setting, useful application cylinder shape die lifting is arranged in the bottom of ring-shaped work pieces
Screw mechanism.The raw metal of atomization is formed by the rotation of centrifugal pan, droplet is cooling in flight course, is deposited on ring
The inner wall of shape part finally prepares bimetallic joint product.
But above-mentioned centrifugal atomizing jetting precipitation device lacks molten drop cooling system, it can only be compound one layer on part
Than relatively thin molten metal, and when preparing thicker plant for metal hollow ingot, the fused raw material on centrifugal pan is fallen in due to temperature itself
Spend it is higher, be atomized into droplet raw metal radiate during throwing away it is also extremely limited, cause atomizing particle with tubular
Mould inner wall still keeps liquid when colliding, and is deposited into mould inner wall and is easy mutually fusion flowing, causes sample slump, make to give birth to
The metal hollow ingot surface of output is irregular and has biggish crystal grain, affects the quality of plant for metal hollow ingot.
Summary of the invention
The purpose of the present invention is to provide one kind to get rid of casting device, to solve in the prior art because of gold caused by cooling down deficiency
The problem of belonging to hollow ingot slump and coarse grains；Simultaneously the present invention also provides it is a kind of suitable for it is above-mentioned get rid of casting device get rid of casting from
Cartridge.
To achieve the above object, a kind of technical solution for getting rid of casting device of the present invention is: including fixed frame, on the fixed frame
Crucible equipped with the raw metal for containing molten condition, crucible bottom are connected with the diversion pipe of guidance raw metal flowing,
The lower section of the outlet of diversion pipe is equipped with centrifugal pan, and centrifugal pan includes disk body for accepting raw metal and is used for and motor passes
The connection structure of dynamic connection is betted onto the disk of disk body by the raw metal of the outlet outflow of diversion pipe, passes through centrifugal pan
High speed rotation is atomized and throws away, and metal being arranged around centrifugal pan, for receiving after being atomized is also equipped on the fixed frame
The cylindrical die of raw material is additionally provided with the centrifugal pan cooling medium runner for cooling medium circulation flowing on the centrifugal pan, cooling
Medium can cool down the disk of disk body.
A kind of beneficial effect for getting rid of casting device of the present invention is: when in use, motor drives centrifugal pan high by connection structure
Speed rotation, the centrifugal pan cooling medium runner in centrifugal pan is passed through cooling medium and cools down to disk, when raw metal by
When in the diversion pipe bet to centrifugal pan of crucible bottom, heat exchange will occur with disk, reduce the heat of raw metal, i.e.,
Increase the temperature in cylindrical die, raw metal has taken away the heat of raw metal when contacting and being atomized with disk
Amount, makes raw metal that can smoothly form the droplet of semisolid during throwing away, and the dendrite on droplet also can be with
Secondary fragmentation occurs for the barrel collision of cylindrical die, makes have uniform, lesser crystal grain in the plant for metal hollow ingot produced.
Further, the connection structure is the connection shaft for being set to disk body lower part, extending along disk body axis, centrifugal pan
Cooling medium runner include be distributed in the intracorporal disk body runner of disk, and be arranged in it is in connection shaft, be connected to disk body runner
Shaft runner, cooling medium passes through the shaft runner and passes in and out the centrifugal pan cooling medium runner；In the inside of centrifugal pan
Cooling medium runner is set, centrifugal pan is made also to be able to carry out sufficient cooling in the rotary course of high speed.
Further, the disk body includes circular plate body and the annular flange that plate body edge is arranged in, flange direction
Direction away from connection shaft extends；Annular flange can be such that raw metal in a molten state is atomized simultaneously at annular flange
It crosses annular flange to throw away outward, forms uniform droplet, improve the consistency of blank.
Further, the disk body includes circular plate body, is provided on plate body corresponding with the outlet of diversion pipe when use
Splicing groove, be also evenly distributed on plate body it is multiple be connected to splicing groove throw away channel, throw away channel around splicing groove in putting
Penetrate shape distribution；Raw metal in a molten state can expect to form more uniform small liquid using the conduit wall for throwing away channel
Drop, improves the consistency of blank.
Further, the preheating structure heated before diversion pipe bet to cylindrical die is equipped on the outside of cylindrical die,
There is the mold cooling medium runner for cooling medium circulation flowing in the cylinder of cylindrical die, cooling medium can be in the gold of atomization
Cylindrical die is cooled down when belonging to the barrel of raw material contact cylindrical die；Before blanking by preheating structure to cylindrical die into
Row heating, prevent the droplet of semisolid after the inner wall for touching cylindrical die to the cold directly condensation, hinder droplet it
Between fusion；Correspondingly, making tubular mould since heat exchange occurs for the inside of the droplet of semisolid and cylindrical die in bet
The temperature of tool increases, and will lead to the droplet fusing of semisolid after being increased to certain process, is unfavorable for the formation of hollow casting,
Cylindrical die is cooled down after the barrel of raw metal contact cylindrical die, there is the barrel surface of cylindrical die always
One layer of semi-solid layer, enables hollow casting smoothly to form.
Further, the entrance and exit of the mold cooling medium runner is separately positioned on the two of cylindrical die axis
Side, the bottom of cylindrical die is arranged in the entrance, described to export the top that cylindrical die is arranged in；Entrance and exit is in cylinder
The two sides of shape mold, and using the arrangement of bottom in and top out, make the more uniform of cylindrical die Temperature Distribution, it is empty to improve metal
The quality of heart ingot.
A kind of technical solution for getting rid of casting centrifugal pan of the present invention is: one kind getting rid of casting centrifugal pan, including for accepting molten condition
Raw metal disk body and connection structure for being connect with motor drive, the centrifugal pan be equipped with and followed for cooling medium
The dynamic centrifugal pan cooling medium runner of circulation, cooling medium can cool down the disk of disk body.
The beneficial effect that the present invention gets rid of casting centrifugal pan is: when in use, motor drives centrifugal pan high speed by connection structure
Rotation, the centrifugal pan cooling medium runner in centrifugal pan are passed through cooling medium and cool down to disk, when raw metal is betted
When on to centrifugal pan, heat exchange will occur with disk, reduce the heat of raw metal, even if environment temperature locating for centrifugal pan
Degree increases, and raw metal has taken away the heat of raw metal when contacting and being atomized with disk, got rid of raw metal
The droplet that semisolid can be smoothly formed during out makes the plant for metal hollow ingot produced have lesser crystal grain.
Further, the connection structure is the connection shaft for being set to disk body lower part, extending along disk body axis, centrifugal pan
Cooling medium runner include be distributed in the intracorporal disk body runner of disk, and be arranged in it is in connection shaft, be connected to disk body runner
Shaft runner, cooling medium passes through the shaft runner and passes in and out the centrifugal pan cooling medium runner；In the inside of centrifugal pan
Cooling medium runner is set, centrifugal pan is made also to be able to carry out sufficient cooling in the rotary course of high speed.
Further, the disk body includes circular plate body and the annular flange that plate body edge is arranged in, flange direction
Direction away from connection shaft extends；Annular flange can be such that raw metal in a molten state is atomized simultaneously at annular flange
It crosses annular flange to throw away outward, forms uniform droplet, improve the consistency of blank.
Further, the disk body includes circular plate body, is provided on plate body corresponding with the outlet of diversion pipe when use
Splicing groove, be also evenly distributed on plate body it is multiple be connected to splicing groove throw away channel, throw away channel around splicing groove in putting
Penetrate shape distribution；Raw metal in a molten state can expect to form more uniform small liquid using the conduit wall for throwing away channel
Drop, improves the consistency of blank.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the present invention gets rid of casting device embodiment one；
Fig. 2 is the schematic diagram that casting centrifugal pan is got rid of in Fig. 1；
Fig. 3 is the cross-sectional view that casting centrifugal pan is got rid of in Fig. 1；
Fig. 4 is Fig. 1 hollow mandrel upper end and the schematic diagram for getting rid of casting centrifugal pan junction；
Fig. 5 is the schematic diagram that casting centrifugal pan is got rid of in the embodiment two of the invention for getting rid of casting device；
Wherein: 1- rotating electric machine hanging plate, the left side 2- hanging plate, the left side 3- spindle motor, 4- centrifugal pan coolant intake, 5- centrifugal pan
Cooling water outlet mouth, 6- rotating electric machine, 7- inflating port, the cooling water inlet pipe of 8- mold, 9- mold base, the left side 10- lead screw, 11- are pre-
Hot stove, 12- vacuum chamber, 13- cylindrical die, 14- smelting furnace, 15- crucible, 16- stopper, 17- stopper bracket, 18- air inlet,
19- stopper control motor, 20- diversion pipe preheating furnace, 21- mold cooling water outlet pipe, 22- exhaust outlet, 23- diversion pipe, 24- centrifugation
Disk, 25- hollow shaft, the right side 26- lead screw, the right side 27- spindle motor, the right side 28- hanging plate, 29- flow chamber, the water inlet of 30- shaft
Runner, 31- shaft outlet passage, 32- splicing groove, 33- throw away channel.
Specific embodiment
Of the invention gets rid of casting device, by setting centrifugal pan cooling medium runner upper in centrifugal pan to centrifugal pan and centrifugation
Raw metal on disk cools down, to guarantee that the raw metal of atomization can smoothly form the droplet of semisolid, protects
Demonstrate,prove the hollow casting quality with higher of output.
The embodiment for getting rid of casting device of the invention is described further with reference to the accompanying drawing.
The embodiment for getting rid of casting device of the invention, including a fixed frame, the fixed frame in the present embodiment are a closing
Cabin, be provided with vacuum mold formation system, vacuum induction melting system and centrifugal pan high speed rotation cooling system in cabin, get rid of casting
Device further includes a control pressurer system.
As shown in Figure 1, vacuum mold formation system includes that the vacuum chamber 12 formed inside cabin is arranged in, in vacuum chamber 12
It is horizontally disposed to have mold base 9, the cylindrical die 13 that axis extends along the vertical direction, cylindrical die are fixed on mold base 9
13 diameter is 400mm ~ 1000mm, and cylindrical die 13 is equipped with the preheating structure heated to it, the cylinder of cylindrical die 13
There is the mold cooling medium runner for cooling medium circulation flowing in vivo, preheating structure and cooling medium make cylindrical die 13 always
It is maintained at certain temperature range；Vacuum mold formation system further includes the screw mechanism that cabin bottom is arranged in, screw mechanism
Mold base 9 can be controlled and cylindrical die 13 moves back and forth up and down.
Specifically, screw structure is the left side lead screw 10 control by left side spindle motor 3 and electric by right side lead screw
The right side lead screw 26 that machine 27 controls, left side lead screw 10 and right side lead screw 26 are distributed vertically and the axis pair of opposite cylindrical die 13
Title, left side spindle motor 3 and right side spindle motor 27 are fixed on the bottom of cabin by left side hanging plate 2 and right side hanging plate 28 respectively
Portion, in this way setting ensure that left side spindle motor 3, left side lead screw 10, right side spindle motor 27 and right side lead screw 26 vertical
Directional spreding makes cylindrical die 13 have good synchronism and stability.Tubular can be controlled and adjusted by screw structure
Mold 13 is moved back and forth up and down with the speed of 5 ~ 30mm/s, and the distance that cylindrical die 13 moves back and forth up and down is 500 ~ 1000mm,
It is able to produce out the hollow casting of different specification size.
Preheating structure is the preheating furnace 11 being set on 13 outer wall of cylindrical die, and preheating furnace 11 can be pre- by cylindrical die 13
Heat is to 400 DEG C ~ 600 DEG C, the hollow cavity that mold cooling medium runner surrounds between 13 outer wall of cylindrical die and inner wall, cooling
Medium, to cool down to cylindrical die, is used as cooling using water in the present embodiment in mold cooling medium runner internal circulation flow
Medium, the adjustable range of water flow are 3 ~ 5t/h, and good cooling results are drawn materials also fairly simple.
The entrance of mold cooling medium runner is arranged on the cooling water inlet pipe 8 of the mold being connected with hollow cavity bottom,
The outlet of mold cooling medium runner is arranged on the mold cooling water outlet pipe 21 being connected at the top of hollow cavity, and mold is cooling
The axis of water inlet pipe 8 and the axis of mold cooling water outlet pipe 21 are arranged relative to the axisymmetrical of cylindrical die 13, while the two
So that water is formd the type of cooling of bottom in and top out, keeps the temperature of cylindrical die 13 more uniform.The cooling water inlet pipe 8 of mold and mould
Having cooling water outlet pipe 21 is the telescoping tube with certain compensation effect, and when guaranteeing screw structure movement, cooling medium still can
It is enough to circulate in mold cooling medium runner.
Vacuum induction melting system includes the closed cabinet being arranged in above cabin, is fixed with smelting furnace 14, melting in cabinet
The inside of furnace 14 is equipped with crucible 15, and smelting furnace 14 can heat crucible 15, so that the raw metal in crucible 15 be melted
Change.The superheat state that is heated to of raw metal, the range of the degree of superheat can be 150 ~ 200 DEG C by crucible 15, it is ensured that in crucible 15
Raw metal can melt completely.
The bottom of crucible 15 is equipped with the mouth of a river phase with diversion pipe 23, crucible 15 and diversion pipe 23 by the bottom of crucible 15
Even, the also mating stopper 16 for being provided with the control mouth of a river and opening or closing of crucible 15, stopper 16 are fixed on and stopper control motor 19
It on connected stopper bracket 17, moves up or moves down by the stopper of control forward or reverse 16 of stopper control motor 19, play and beat
The effect at the mouth of a river is closed on or off.The diameter of diversion pipe 23 is 4 ~ 8mm, can effectively control the bet flow of raw metal, keep away
Exempt from the case where bet flow ambassador raw metal can not be atomized occur.The outside of diversion pipe 23, which is provided with, adds diversion pipe 23
Diversion pipe 23 can be preheating to 400 DEG C ~ 600 DEG C before blanking, prevented by the diversion pipe preheating furnace 20 of heat, diversion pipe preheating furnace 20
Raw metal is set in the inner wall of diversion pipe 23 during bet when stopper 16 is opened, and influences blanking.
Centrifugal pan high speed rotation cooling system includes diversion pipe 23 and the centrifugal pan 24 immediately below diversion pipe 23, is led
The distance for being exported to centrifugal pan 24 of flow tube 23 is 10 ~ 30mm, and the diameter of centrifugal pan 24 is 35mm ~ 80mm, and centrifugation disk rotating speed can
Adjustable range is 0 ~ 24000r/min, and the material of centrifugal pan 24 can select copper alloy or special steel, meet high revolving speed and height
The demand of warm operating condition.Can bet be atomized and be thrown away to the raw metal in its disk by the high speed rotation of centrifugal pan 24.
Inside cylindrical die 13 and concentric with cylindrical die 13, the hollow forging produced in this way is arranged in centrifugal pan 24
With good concentricity.It is connected by connection structure with rotating electric machine 6 below centrifugal pan 24, connection structure is in the present embodiment
Lower part in centrifugal pan disk body and the connection shaft extended along disk body axis, rotating electric machine 6 are fixed by rotating electric machine hanging plate 1
The bottom of cabin is hung over, rotating electric machine 6 is able to drive 24 high speed rotation of centrifugal pan, and the specific shaft that connects is hollow shaft 25；From
Raw metal in a molten state on centrifugal pan 24 is atomized by cartridge 24 by high speed rotation, and centered on centrifugal pan 24
It throws away around.
As shown in Fig. 2, the disk body of centrifugal pan 24 includes circular plate body and the annular flange that plate body edge is arranged in, it is convex
The direction that edge faces away from connection shaft extends；Annular flange can make raw metal in a molten state at annular flange
It is atomized and crosses annular flange and throw away outward, form uniform droplet, improve the consistency of blank.
As shown in Figure 3 and Figure 4, centrifugal pan 24 is provided with cavity, and cavity forms the flow chamber for cooling media flow
29, through-flow section of 24 lower part of centrifugal pan is connected through a screw thread just like hollow shaft 25 shown in Fig. 4, the upper end outer peripheral surface of hollow shaft 25
On be provided with the external screw thread (not shown) connecting with the lower thread of centrifugal pan 24, in order to improve centrifugal pan 24 and hollow shaft
25 sealing performance is additionally provided with gasket in the junction of the two.Hollow shaft 25 have the shaft for axially penetrating through hollow shaft into
Water flow passage 30, shaft water inlet flow channel 30 are connected by through-flow section with flow chamber 29, enter flowing for external cooling medium stream
In chamber 29；Be additionally provided in the axial wall of hollow shaft 25 it is around shaft water inlet flow channel 30, axially penetrating through hollow shaft 25 turn
Axis outlet passage 31, shaft outlet passage 31 are connected by through-flow section with flow chamber 29, for the cooling in flow chamber 29
Water outflow.
Since hollow shaft 25 needs high speed rotation, rotary joint is set in the lower end of hollow shaft 25, makes shaft water inlet flow channel
30 lower end is connected with centrifugal pan coolant intake 4, and shaft outlet passage 31 is connected with centrifugal pan cooling water outlet mouth 5, guarantees cold
But the circulation of medium.
Control pressurer system include the inflating port 7 of cabin bottom being connected with vacuum chamber 12, at the top of cabin with it is true
Empty room 12 is connected exhaust outlet 22 and the air inlet 18 in top of the box, by cabin outside vacuum evacuation device can be in cabin
Interior formation negative pressure can also make raw metal from height by air inlet 18 and inflating port 7 to protective gas is filled in cabin and cabinet
The molten condition of temperature avoids a possibility that traditional handicraft brings oxidation and pollution to solid-state is cooled to all not with atmosphere contact,
Decrease the content of impurity.
In melting, first raw metal is put into crucible 15, the water of 15 lower section of crucible is opened in the position for adjusting stopper 16
Mouth and collecting chamber exhaust outlet 22, carry out forvacuum to vacuum chamber 12, then open collecting chamber inflating port 7 and are filled with inert gas,
It by the intracorporal air discharge of the case of vacuum chamber 12 and vacuum induction melting system, then vacuumizes again, makes vacuum chamber 12 and true
Vacuum environment is formed in the cabinet of empty smelting system, the mouth of a river is closed in the position for then adjusting stopper 16, carries out to raw metal
Heating is passed through inert gas into the cabinet of vacuum induction melting system by air inlet 18 after raw metal fusing, to control metal
The rate of outflow of raw material.The fusing of raw metal and get rid of casting process all and be under the protection for vacuum environment or inert gas into
Row.
By the flow, water flow, the cylindrical die that adjust the revolving speed of centrifugal pan, the degree of superheat of raw metal, raw metal
The technological parameters such as 13 up and down motion speed, are capable of forming diameter 400mm ~ 1000mm, height 500mm ~ 1000mm, and thickness about 15 ~
The plant for metal hollow ingot ingot of 200mm, meets the needs of different.
The use process of the present embodiment is introduced by taking two kinds of plant for metal hollow ingot as an example below.
By taking the Mn18Cr18N plant for metal hollow ingot for preparing retaining ring as an example；
(1) it is first added the Mn18Cr18N raw material of melting as raw metal in crucible 15, the position by adjusting stopper 16 is beaten
The mouth of a river and the collecting chamber exhaust outlet 22 for opening 15 lower section of crucible, to the progress forvacuum of vacuum chamber 12 to 5Pa, after forvacuum,
It opens collecting chamber inflating port 7 and is passed through a small amount of argon gas, the vacuum pressure for being then evacuated to collecting chamber again is 1 kPa or so.
(2) by adjusting the mouth of a river of 15 lower section of position closing crucible of stopper 16, the power supply of smelting furnace 14 is opened, metal is made
Raw material starts to melt.The power supply for opening simultaneously diversion pipe preheating furnace 20 and preheating furnace 11, diversion pipe 23 and cylindrical die 13 is pre-
Heat is to 400 DEG C.
(3) air inlet 18 is opened, argon gas is passed through, pressurizes to working chamber, make 120 kPa of vacuum pressure of working chamber
Left and right, to guarantee that molten metal raw material can make raw metal bet that can be continuously available benefit with a nearly constant speed outflow diversion pipe
It repays.
(4) 15min is kept the temperature when molten metal raw material reaches 1550 DEG C, to ensure that there is no do not melt in raw metal
Alloying element or the high temperature compound that is likely to form, prevent the mobility of raw metal to be affected.
(5) diameter is that 54mm centrifugal pan 24 is adjusted to 12000r/min, led to by the power supply for opening centrifugal pan rotating electric machine 6
Enter circulating water, water flow 0.5t/h；Meanwhile the power supply of preheating furnace 11 is closed, open left side spindle motor 3 and right side silk
The power supply of thick stick motor 27, adjusting moving displacement are 500mm, the fortune up and down of movement velocity 10mm/s, Lai Shixian cylindrical die 13
It is dynamic.
(6) mouth of a river of 15 lower section of crucible is opened by adjusting the position of stopper 16, molten metal raw material is under diversion pipe
It infuses on high-speed rotating water cooling centrifugal pan 24, wherein the distance of draft tube outlets to centrifugal pan is 10mm, by centrifugal force
Effect makes metal liquid be atomized into tiny droplet, the tubular that it is 400mm to the diameter of preheating that centrifugal pan 24, which is delivered droplets on and got rid of,
On mold 13, then to recirculated cooling water is passed through in mold cooling medium runner, water flow 3t/h guarantees sample surfaces always
There is one layer of semi-solid layer, so that diameter 400mm is formed, height 500mm, the Mn18Cr18N plant for metal hollow ingot of thickness about 120mm.
For preparing bearing ring GCr15 plant for metal hollow ingot:
(1) it is first added the GCr15 raw material of melting as raw metal in crucible 15, earthenware is opened in the position by adjusting stopper 16
The mouth of a river of 15 lower section of crucible and collecting chamber exhaust outlet 22 carry out forvacuum to vacuum chamber 12 and open after forvacuum to 5Pa
Collecting chamber inflating port 7 is passed through a small amount of argon gas, and the vacuum pressure for being then evacuated to collecting chamber again is 4 kPa or so.
(2) by adjusting the mouth of a river of 15 lower section of position closing crucible of stopper 16, the power supply of smelting furnace 14 is opened, metal is made
Raw material starts to melt.The power supply for opening simultaneously diversion pipe preheating furnace 20 and cylindrical die preheating furnace 11, to diversion pipe 23 and tubular
Mold 13 is preheating to 500 DEG C.
(3) air inlet 18 is opened, argon gas is passed through, pressurizes to working chamber, make 150 kPa of vacuum pressure of working chamber
Left and right, to guarantee that molten metal raw material can make raw metal bet that can be continuously available benefit with a nearly constant speed outflow diversion pipe
It repays.
(4) 10min is kept the temperature when alloy melt reaches 1600 DEG C, to ensure that there is no the alloying elements not melted in molten steel
Or the high temperature compound being likely to form, prevent the mobility of alloy melt to be affected.
(5) diameter is that 80mm centrifugal pan 24 is adjusted to 15000r/min, led to by the power supply for opening centrifugal pan rotating electric machine 6
Enter circulating water, water flow 0.5t/h；Meanwhile the power supply of cylindrical die preheating furnace 11 is closed, open left side spindle motor 3
With the power supply of right side spindle motor 27, adjusting moving displacement is 750mm, movement velocity 15mm/s, Lai Shixian cylindrical die
It moves up and down.
(6) mouth of a river of 15 lower section of crucible is opened by adjusting the position of stopper 16, molten metal raw material is under diversion pipe
It infuses on high-speed rotating water cooling centrifugal pan 24, wherein the distance of draft tube outlets to centrifugal pan is 15mm, by centrifugal force
Effect makes metal liquid be atomized into tiny droplet, the tubular that it is 800mm to the diameter of preheating that centrifugal pan 24, which is delivered droplets on and got rid of,
Then to recirculated cooling water is passed through in mold cooling medium runner on mold 13, water flow 5t/h guarantees sample surfaces always
There is one layer of semi-solid layer, so that diameter 800mm is formed, height 750mm, the GCr15 plant for metal hollow ingot of thickness about 80mm.
After raw metal is completely melt in crucible, stopper is opened, the raw metal of the molten condition in crucible is passed through
Diversion pipe is fallen on centrifugal pan, and the interior cooling medium of centrifugal pan cooling medium runner cools down raw metal, due to gold
Belonging to raw material has certain degree of superheat, is at this time not in solidification, and raw metal is atomized and is thrown away by the high speed rotation of centrifugal pan,
In this course due to fast speed, raw metal by falling on centrifugal pan to being atomized this stage still in molten condition,
Raw metal can cool down again during throwing away and flying, and raw metal is capable of forming the droplet and shape of semisolid at this time
At dendrite, the dendrite formed when the droplet of semisolid impinges upon on the inner wall of cylindrical die will appear secondary fragmentation
Smaller dendrite is formed, since cylindrical die is further equipped with preheating structure and mold cooling medium runner, tubular knot can be controlled
Structure remains within the scope of certain temperature, and making sample surfaces always has the semi-solid layer of one layer of semisolid droplet formation,
Raw metal in semisolid will not flow in fusion when cylindrical die inner wall forms, and avoid sample slump.In this way
Mode obtained plant for metal hollow ingot ingot crystal grain, carbide it is tiny, segregation-free, consistency is high, degree of oxidation is small, to improve
The performance for processing obtained part can satisfy kind of a different demand.
The present invention gets rid of the embodiment two of casting device, with embodiment one the difference is that: the structure of centrifugal pan such as Fig. 3 institute
Showing, the disk body of centrifugal pan includes circular plate body, splicing groove 32 corresponding with the outlet of diversion pipe when use is provided on plate body,
Also be evenly distributed on plate body it is multiple be connected to splicing groove 32 throw away channel 33, throw away channel 33 around splicing groove 32 in radiation
Shape distribution；Raw metal in a molten state can expect to form more uniform small liquid using the conduit wall for throwing away channel 33
Drop, improves the consistency of blank, and centrifugal pan lower part has been connected through a screw thread hollow shaft 25, the sky in hollow shaft 25 and embodiment one
Mandrel structure is identical.
The present invention gets rid of the embodiment three of casting device, with embodiment one the difference is that: the cooling medium be air.
The present invention gets rid of the example IV of casting device, with embodiment one the difference is that: the outside of cylindrical die is not set
Preheating structure is set, by being heated into cooling medium runner by high temperature fluid to cylindrical die, setting being capable of letter in this way
Change the structure of cylindrical die.
The present invention gets rid of the embodiment five of casting device, with embodiment one the difference is that: the entrance of cooling medium runner
Or outlet is all disposed within the top of cylindrical die, or is all disposed within the bottom of cylindrical die.
The present invention gets rid of the embodiment six of casting device, with embodiment one the difference is that: the lower part of centrifugal pan is not provided with
Hollow connection shaft directly drives centrifugal pan high speed rotation by motor.
The present invention gets rid of the embodiment of casting centrifugal pan, identical as the above-mentioned centrifugation dish structure got rid of in casting device, no longer superfluous herein
It states.
Claims (10)
1. one kind gets rid of casting device, including fixed frame, the fixed frame is equipped with the earthenware for containing the raw metal of molten condition
Crucible, crucible bottom are connected with the diversion pipe of guidance raw metal flowing, and the lower section of the outlet of diversion pipe is equipped with centrifugal pan, centrifugal pan
Including the disk body for accepting raw metal and the connection structure for being connect with motor drive, flowed out by the outlet of diversion pipe
Raw metal bet in the disk of disk body, be atomized and throw away by the high speed rotation of centrifugal pan, also pacify on the fixed frame
Equipped with cylindrical die being arranged around centrifugal pan, for receiving the raw metal after being atomized, characterized in that on the centrifugal pan
It is additionally provided with the centrifugal pan cooling medium runner for cooling medium circulation flowing, cooling medium can carry out the disk of disk body cold
But.
2. according to claim 1 get rid of casting device, characterized in that the connection structure is to be set to disk body lower part, along disk
The connection shaft that body axis extends, centrifugal pan cooling medium runner include being distributed in the intracorporal disk body runner of disk, and setting exists
Shaft runner in connection shaft, being connected to disk body runner, cooling medium pass in and out the centrifugal pan by the shaft runner
Cooling medium runner.
3. according to claim 2 get rid of casting device, characterized in that the disk body includes circular plate body and is arranged in plate
The annular flange at body edge, flange face away from the direction protrusion of connection shaft.
4. according to claim 2 get rid of casting device, characterized in that the disk body includes circular plate body, is arranged on plate body
Splicing groove corresponding with the outlet of diversion pipe when having a use, be also evenly distributed on plate body it is multiple be connected to splicing groove throw away it is logical
Road throws away channel and radially distributes around splicing groove.
5. getting rid of casting device described in any one of -4 according to claim 1, characterized in that be equipped on the outside of cylindrical die in water conservancy diversion
The preheating structure that is heated to cylindrical die before pipe bet has the mould for cooling medium circulation flowing in the cylinder of cylindrical die
Has cooling medium runner, cooling medium can carry out cylindrical die when the raw metal of atomization contacts the barrel of cylindrical die
It is cooling.
6. according to claim 5 get rid of casting device, characterized in that the entrance and exit of the mold cooling medium runner point
The two sides of cylindrical die axis are not set, and the bottom of cylindrical die is arranged in the entrance, and the outlet is arranged in tubular mould
The top of tool.
7. one kind gets rid of casting centrifugal pan, disk body including the raw metal for accepting molten condition and it is used for and motor drive connects
The connection structure connect, characterized in that the centrifugal pan is equipped with the centrifugal pan cooling medium runner for cooling medium circulation flowing,
Cooling medium can cool down the disk of disk body.
8. according to claim 7 get rid of casting centrifugal pan, characterized in that the connection structure is to be set to disk body lower part, edge
The connection shaft that disk body axis extends, centrifugal pan cooling medium runner include being distributed in the intracorporal disk body runner of disk, and be arranged
Shaft runner in connection shaft, being connected to disk body runner, cooling medium pass in and out the centrifugation by the shaft runner
Disk cooling medium runner.
9. according to claim 8 get rid of casting centrifugal pan, characterized in that the disk body includes that circular plate body and setting exist
The annular flange at plate body edge, flange face away from the direction protrusion of connection shaft.
10. according to claim 8 get rid of casting centrifugal pan, characterized in that the disk body includes circular plate body, is set on plate body
Be equipped with splicing groove corresponding with the outlet of diversion pipe when use, be also evenly distributed on plate body it is multiple be connected to splicing groove throw away
Channel throws away channel and radially distributes around splicing groove.
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| CN201910304855.6A CN109877299B (en) | 2019-04-16 | 2019-04-16 | Casting device and casting centrifugal disc |
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| CN201910304855.6A CN109877299B (en) | 2019-04-16 | 2019-04-16 | Casting device and casting centrifugal disc |
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| CN115121779A (en) * | 2022-06-30 | 2022-09-30 | 河南科技大学 | Centrifugal jet forming device capable of adjusting axial size of annular blank |
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