CN115041646B - Constant-pressure thin belt preparation method - Google Patents
Constant-pressure thin belt preparation method Download PDFInfo
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- CN115041646B CN115041646B CN202210760834.7A CN202210760834A CN115041646B CN 115041646 B CN115041646 B CN 115041646B CN 202210760834 A CN202210760834 A CN 202210760834A CN 115041646 B CN115041646 B CN 115041646B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
- B22D11/0642—Nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0648—Casting surfaces
- B22D11/0651—Casting wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
- B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
Abstract
The invention provides a method for preparing a thin strip with constant pressure, which relates to the technical field of preparation of thin strip alloy materials and comprises the following steps: the method comprises the steps of controlling a nozzle package to spray alloy liquid contained in the nozzle package to the surface of a rapidly rotating cooling roller through a nozzle on the side surface of the nozzle package so as to form a solid alloy strip, and continuously introducing inert gas into the nozzle package in the process of spraying the strip so as to compensate hydraulic pressure drop caused by liquid level drop of the alloy liquid in the process of strip manufacturing; and controlling the inflow amount of inert gas according to an air pressure fluctuation equation. The method has the beneficial effects that the real-time compensation air pressure value is calculated and controlled automatically in real time according to the air pressure fluctuation equation according to the technological parameters of the strip spraying, so that the constant pressure of the alloy liquid sprayed from the nozzle in the whole strip manufacturing process is ensured; only the rotation speed of the grabbing roller is monitored in real time, the intervention time of each calculation factor is relatively early, the instantaneity is relatively high, and the calculation is relatively accurate; the cooling distance of the strip can be increased by adopting a side spray casting strip manufacturing mode, and the prepared alloy strip has stable quality and better consistency.
Description
Technical Field
The invention relates to the technical field of preparation of ribbon-shaped alloy materials, in particular to a method for preparing a ribbon with constant pressure.
Background
The rapid development of the power electronics industry, up to high voltage power transmission, such as: the power transmission and transformation system takes a transformer as a core; as small as electronic components, such as: the power electronic frequency conversion equipment with the inductance and the electronic transformer as cores and the microelectronic field face the challenges of high frequency, high power conversion and high energy density, and the development of soft magnetic alloy materials is not separated. The Fe-based amorphous and nanocrystalline soft magnetic alloy is a main soft magnetic material for manufacturing devices such as high-power transformers, inductors, electronic transformers and the like, and the development progress of the power electronics field is directly determined by the development level of the Fe-based amorphous and nanocrystalline soft magnetic alloy.
The production process of amorphous and nanocrystalline alloy strips generally adopts a smelting furnace to smelt master alloy according to the chemical component proportion, then the master alloy is heated and remelted by an induction smelting furnace and then poured into a nozzle bag of a strip making machine, and the master alloy is sprayed onto the surface of a rapidly rotating cooling roller through a nozzle on the nozzle bag under pressure, so that the strip with the thickness of less than 40 mu m is prepared.
Under the frame of the production and preparation process, most of the strip spraying pressure of the strip making device is generated by the self weight of alloy liquid in the nozzle bag, but the generated pressure is smaller, so that the nozzle seam is wider, the sprayed strip is thicker, the toughness is poorer, and the strip making device is not suitable for being applied to high-frequency devices; in order to maintain stable spraying pressure, alloy liquid needs to be continuously injected into a nozzle bag, and is basically controlled by a tape maker manually, so that the influence of human factors is great; in the final stage of the strip spraying, when no alloy liquid is replenished, the pressure of the strip spraying is greatly reduced, so that the difference between the quality of the strip and the stable preparation stage is large, and basically, the strip can only be returned to the furnace again, thereby causing energy waste. The pressure drop caused by the drop of the liquid level is compensated by the air pressure of inert gas by adopting a sealed nozzle bag, but the air pressure compensation is basically carried out manually and in stages by depending on the experience of a tape producer, and the monitoring or measurement of the final tape spraying pressure is avoided, so that the influence of human factors is large, and the constant tape spraying pressure in the whole tape producing process cannot be ensured.
Patent CN 108145104B proposes to estimate the reduction amount of molten steel in the nozzle packet by calculating the volume of the produced strip by adopting a mode of assembling measuring instruments such as a thickness gauge, and calculate the required compensating air pressure in the nozzle packet by a certain formula, thereby ensuring the constant pressure in the nozzle packet, but the following problems still exist: the sprayed strip has short contact distance with the cooling roller, and the cooling effect is insufficient, so that the temperature is still higher after the grabbing roller grabs the strip, the toughness of the strip is seriously affected, and the preparation of the high-performance strip is restricted; the thickness gauge is required to be inserted after the strip is successfully grabbed and the grabbing equipment reaches the designated winding position, and the calculation influence factors are more, so that the calculation accuracy cannot be guaranteed.
Disclosure of Invention
The invention provides a constant-pressure thin strip preparation method aiming at the problems in the prior art, which comprises the steps of pre-configuring a thin strip preparation device, wherein the thin strip preparation device comprises a sealed nozzle bag, a cooling roller is arranged on the side surface of the nozzle bag, and a grabbing roller is arranged on one side of the cooling roller; the thin strip preparation method comprises the following steps:
controlling the nozzle package to spray alloy liquid contained in the nozzle package to the surface of the rapidly rotating cooling roller through a nozzle on the side surface of the nozzle package so as to form a solid alloy strip, and continuously introducing inert gas into the nozzle package in the process of spraying the strip so as to compensate the hydraulic pressure drop caused by the drop of the liquid level of the alloy liquid in the process of strip making;
controlling the inflow amount of the inert gas according to a pressure change equation, wherein the pressure change equation is as follows: p=p 0 +ρgW(π(r 2 v 2 /v 1 ) 2 -πr 1 2 )/A
Wherein p represents the real-time compensated air pressure value of the nozzle package, p 0 Representing the initial compensated air pressure value of the nozzle bag before the spraying of the strip, ρ representing the density of the alloy strip, g representing the gravitational acceleration, W representing the width of the alloy strip, A representing the cross-sectional area of the inner cavity of the nozzle bag, r 1 Represents the radius of the grabbing roller, r 2 Representing the radius of the chill roll, v 1 Representing the real-time rotation speed of the grabbing roller, v 2 Indicating the real-time rotational speed of the chill roll.
Preferably, the method for preparing the thin belt comprises the following steps:
step S1, preheating an inner cavity of the nozzle bag to a preset alloy liquid heat preservation temperature;
s2, pouring the melted alloy liquid into the nozzle package, adjusting the interval between the nozzle and the cooling roller, and then sealing the nozzle package;
s3, filling the inert gas into the nozzle bag so as to increase the actual compensating air pressure in the nozzle bag to the initial compensating air pressure value;
and S4, opening a valve of a liquid outlet of the nozzle bag, starting to spray the belt, and adjusting the inflow amount of the inert gas in real time according to the air pressure change equation in the belt spraying process so as to enable the actual compensation air pressure in the nozzle bag to be consistent with the real-time compensation air pressure value.
Preferably, in step S4, in the process of spraying the belt, the thin belt preparation device collects the rotational speeds of the grabbing roller and the cooling roller in real time, calculates a real-time compensation air pressure value according to the air pressure variation equation and the real-time rotational speeds of the grabbing roller and the cooling roller, and further adjusts the inflow amount of the inert gas in real time.
Preferably, the nozzle bag is provided with an air inlet which is connected with an external air inlet pipeline, and the air inlet pipeline is provided with a gas mass flow controller;
in the step S4, the thin strip preparation device automatically controls the valve of the gas mass flow controller according to the real-time compensated air pressure value calculated by the air pressure variation equation and the corresponding real compensated air pressure, and adjusts the inflow amount of the inert gas in real time, so that the real compensated air pressure in the nozzle bag is consistent with the real-time compensated air pressure value.
Preferably, the thin belt preparation device acquires the actual compensation air pressure through an air pressure sensor arranged on the nozzle bag.
Preferably, a heater and a temperature acquisition component are further arranged in the nozzle package, and after the step S2 is executed, the method further comprises the step of monitoring the actual temperature of the alloy liquid in the nozzle package in real time through the temperature acquisition component, and keeping the actual temperature consistent with the heat preservation temperature of the alloy liquid through automatic regulation and control of the heater.
Preferably, the inert gas is argon.
Preferably, a supporting roller is arranged between the cooling roller and the grabbing roller, and a compression roller is arranged between the cooling roller and the supporting roller.
The technical scheme has the following advantages or beneficial effects:
1) Compared with the existing technology of casting the strip on the top surface of the cooling roller, the method greatly increases the contact time and distance between the strip and the cooling roller, achieves better cooling effect, and the alloy strip prepared by the technical scheme has better toughness, performance and quality stability, and is more beneficial to the preparation of high-performance strips;
2) Filling alloy liquid into a sealed nozzle bag and spraying the alloy liquid, introducing inert gas into the nozzle bag in the process of spraying the alloy liquid, and compensating hydraulic pressure drop caused by the drop of the liquid level of the alloy liquid in the process of manufacturing the alloy liquid by using the air pressure of the inert gas, wherein the real-time compensation air pressure value is calculated and controlled automatically in real time according to an air pressure fluctuation equation according to the technological parameters of spraying the alloy liquid, so that the constant pressure sprayed out of the nozzle in the whole process of manufacturing the alloy liquid;
3) The method has the advantages that the volume of the strip is calculated when the strip is successfully grabbed, so that the consumption of alloy liquid in the nozzle bag and the required real-time compensation air pressure value are obtained, the intervention time of each calculation factor is relatively early, the instantaneity is relatively high, the calculation is relatively accurate, the calculation mode is not influenced by factors such as the strip-limiting time and the strip-discharging speed, the thickness of the strip is not required to be measured in real time, the rotating speed of the grabbing roller is only required to be monitored in real time, and the required real-time compensation air pressure value in the nozzle bag at different time intervals can be obtained through the change of the rotating speed ratio of the cooling roller to the rotating speed of the grabbing roller.
Drawings
FIG. 1 is a schematic view of a thin strip manufacturing apparatus according to a preferred embodiment of the present invention;
FIG. 2 is a flow chart of a method for producing a constant pressure ribbon according to a preferred embodiment of the present invention.
In the accompanying drawings: 1. a central console; 2. a nozzle pack; 3. a nozzle cup; 4. a nozzle; 5. a cooling roller; 6. a press roller; 7. a support roller; 8. a grabbing roller; 9. covering; 10. a valve; 11. packing the nozzle bag; 12. a silicon carbide rod; 13. a silicon carbide rod heater; 14. a gas mass flow controller; 15. an air inlet; 16. sealing cover of pouring gate; 17. a thermocouple; 18. an air pressure sensor; 19. a strip.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The present invention is not limited to the embodiment, and other embodiments may fall within the scope of the present invention as long as they conform to the gist of the present invention.
In a preferred embodiment of the present invention, based on the above-mentioned problems occurring in the prior art, there is now provided a constant pressure thin tape preparation method, as shown in fig. 1, by which the constant pressure thin tape preparation method of the present invention is implemented by pre-configuring a thin tape preparation apparatus comprising a center console 1, implementing control of the whole flow of thin tape preparation, wherein solid arrows in the drawing represent respective control signals output from the center console 1, and dotted arrows represent measurement data signals input from respective measurement mechanisms to the center console 1; the thin strip preparation device further comprises a sealed nozzle bag 2, a nozzle cup 3 is arranged on the side face of the nozzle bag 2, a nozzle 4 is arranged on the side face, away from the nozzle bag 2, of the nozzle cup 3, a cooling roller 5 is arranged on the side face of the nozzle bag 2, and a compression roller 6, a supporting roller 7 and a grabbing roller 8 are sequentially arranged on the other side of the cooling roller 5; the ribbon preparation method comprises:
the nozzle package 2 is controlled to spray an alloy liquid contained in the interior to the surface of the fast-rotating cooling roller 5 through a nozzle 4 on the side surface of the nozzle package 2 so as to form a solid alloy strip, and inert gas is continuously introduced into the nozzle package 2 in the process of strip spraying so as to compensate the hydraulic pressure drop caused by the drop of the liquid level of the alloy liquid in the process of strip making;
controlling the inflow amount of inert gas according to a pressure variation equation, wherein the pressure variation equation is p=p 0 +ρgW(π(r 2 v 2 /v 1 ) 2 -πr 1 2 )/A
Wherein, p represents the real-time compensated air pressure value of the nozzle package, unit: kPa; p is p 0 The initial compensated air pressure value of the nozzle bag before the spraying belt is expressed in units: kPa; ρ represents the density of the alloy strip in units of: g/cm3; g represents the gravitational acceleration, 9.8m/s2; w represents the width of the alloy strip in units of: mm; a represents the cross-sectional area of the inner cavity of the nozzle bag, and the unit is: mm2; r is (r) 1 The radius of the grip roll is indicated in units of: mm; r is (r) 2 The radius of the chill roll, unit: mm; v 1 The real-time rotation speed of the grabbing roller is represented, and the unit is: r/min;v 2 indicating the real-time rotation speed of the cooling roller, unit: r/min.
Specifically, in this embodiment, the air pressure variation equation may be preconfigured in the central console 1, and before the alloy strip is prepared, the spraying process parameters including the width W and the density ρ of the alloy strip to be prepared, and the initial compensated air pressure p may be preset by the central console 1 0 The cross-sectional area A of the inner cavity of the nozzle bag and the radius r of the grabbing roller 1 Radius r of cooling roller 2 For calculating the real-time compensation air pressure value, the above-mentioned technological parameter of spraying belt is the value which is unchanged in the course of making belt, and the real-time radius r of gripping roller 3 As the alloy strip is produced, since it is necessary to wind the alloy strip, the initial radius of the pinch roller 8 is gradually increased when the alloy strip is not wound, and therefore, only the parameter is required to be obtained in real time during the production of the alloy strip, the real-time radius r of the pinch roller 3 Can be calculated by the following formula: r is (r) 3 ＝r 2 v 2 /v 1 In which the rotational speed v of the gripping roller 2 The real-time monitoring can be carried out in the process of belt manufacturing, the real-time compensation air pressure value p is calculated in real time based on the parameter, the feeding amount of inert gas is adjusted according to the real-time compensation air pressure value p, the hydraulic pressure drop caused by the drop of the liquid level of alloy liquid in the process of belt manufacturing is compensated by the air pressure of the inert gas, and the constant pressure of the alloy liquid sprayed out of the nozzle 4 in the whole process of belt manufacturing is realized.
Wherein W (pi (r) 2 v 2 /v 1 ) 2 -πr 1 2 ) The volume of the strip 19, pgw (pi (r) 2 v 2 /v 1 ) 2 -πr 1 2 ) The weight of the alloy strip 19 successfully grabbed by the grabbing roller 8 can be represented, and then the consumption of the alloy liquid in the nozzle bag 2 and the required compensation air pressure value are obtained based on the weight of the prepared strip 19, the intervention time of each calculation factor is relatively early, the instantaneity is relatively strong, the calculation is relatively accurate, the calculation mode is not influenced by factors such as the strip-limiting time and the strip-discharging speed, and the thickness of the strip 19 is not required to be measured in real time.
Further specifically, after the above-mentioned tape-spraying process parameters are configured in the center console 1, as shown in fig. 2, the thin tape preparation method includes the steps of:
step S1, preheating an inner cavity of a nozzle bag to a preset alloy liquid heat preservation temperature;
s2, pouring the smelted alloy liquid into a nozzle package, adjusting the interval between the nozzle and a cooling roller, and then sealing the nozzle package;
s3, filling inert gas into the nozzle bag so as to raise the actual compensation air pressure in the nozzle bag to an initial compensation air pressure value;
and S4, opening a valve at a liquid outlet of the nozzle bag, starting to spray the belt, and adjusting the inflow amount of the inert gas in real time according to an air pressure change equation in the belt spraying process so as to enable the actual compensation air pressure in the nozzle bag to be consistent with the real-time compensation air pressure value.
Specifically, in this embodiment, the alloy liquid heat-preserving temperature may be pre-configured in the central control console 1 as the strip spraying process parameter, so that the central control console 1 can control the preheating of the inner cavity of the nozzle package 2 to the preset alloy liquid heat-preserving temperature. As shown in fig. 1, the thin strip preparation device comprises a nozzle package lower package 11, a silicon carbide rod 12 is embedded in the nozzle package lower package 11, the silicon carbide rod 12 is connected with a silicon carbide rod heater 13, and the central control console 1 preheats the inner cavity of the nozzle package 2 to a preset alloy liquid heat preservation temperature by regulating and controlling the silicon carbide rod 12 and the silicon carbide rod heater 13. The side of the nozzle package 11 is close to the position of package bottom and is equipped with a liquid outlet, and the nozzle package 11 is linked together with outside nozzle cup 3 through the liquid outlet, still is equipped with a valve 10 on the liquid outlet, and when valve 10 was closed, the shutoff liquid outlet, and at this moment, alloy liquid can not flow to nozzle cup 3, and when valve 10 was opened, alloy liquid flowed out by the liquid outlet, sprays the cooling roller 5 surface of fast rotation through nozzle cup 3 and nozzle 4 under the pressure effect, forms banded alloy material, i.e. solid alloy strip. The top cover of the nozzle bag 2 is provided with a bag cover 9, an air inlet 15 of an external air inlet pipeline is arranged on the bag cover 9 for introducing inert gas, and a gas mass flow controller 14 is arranged on the air inlet pipeline for adjusting the introducing amount of the inert gas in real time. The ladle cover 9 is further provided with a pouring gate sealing cover 16, and in step S2, the pouring gate sealing cover 16 is opened to pour the melted alloy liquid into the nozzle ladle 2. It will be appreciated that the whole thin strip preparation apparatus should also include a corresponding support structure and an actuating mechanism, which are not drawn in the figures for simplicity and clarity.
In the preferred embodiment of the present invention, in step S4, in the process of spraying the tape, the thin tape preparation device collects the rotational speeds of the grabbing roller 8 and the cooling roller 5 in real time, calculates the real-time compensated air pressure value according to the air pressure variation equation and the real-time rotational speeds of the grabbing roller 8 and the cooling roller 5, and further adjusts the inflow amount of the inert gas in real time.
In the preferred embodiment of the invention, the nozzle bag 2 is provided with an air inlet 15 which is connected with an external air inlet pipeline, and the air inlet pipeline is provided with a gas mass flow controller 14;
in step S4, the thin-strip preparation device automatically controls the valve of the gas mass flow controller 14 according to the real-time compensated air pressure value calculated by the air pressure variation equation and the corresponding real-time compensated air pressure, and adjusts the amount of inert gas introduced in real time, so that the real compensated air pressure in the nozzle package 2 is consistent with the calculated real-time compensated air pressure value.
In the preferred embodiment of the present invention, the strip preparation apparatus acquires the actual compensated air pressure by an air pressure sensor 18 provided on the nozzle pack 2.
In the preferred embodiment of the invention, a heater and a temperature acquisition component are further arranged in the nozzle bag 2, and after the step S2 is executed, the method further comprises the step of monitoring the actual temperature of the alloy liquid in the nozzle bag 2 in real time through the temperature acquisition component, and keeping the actual temperature consistent with the heat preservation temperature of the alloy liquid through automatic regulation and control of the heater.
Specifically, in this embodiment, the heater is a silicon carbide rod 12 and a silicon carbide rod heater 13 connected thereto, and the temperature acquisition component is a thermocouple 17.
In a preferred embodiment of the present invention, the inert gas is one of argon and nitrogen.
In the preferred embodiment of the invention, a supporting roller 7 is arranged between the cooling roller 5 and the grabbing roller 8, and a pressing roller 6 is arranged between the cooling roller 5 and the supporting roller 7.
In particular, in this embodiment, the pressing roller 6 ensures that the strip 19 still has sufficient time to contact the cooling roller 5 after the take-up of the gripping roller 8, to ensure the cooling effect and to act as a secondary cooling. The two support rollers 7 ensure that the strip 19 is stably conveyed at a high speed after being coiled by the grabbing roller 8, the instantaneity and the accuracy of measurement of the speed measuring sensor on the grabbing roller 8 are ensured, and the effect of cooling again can be achieved.
As a preferred embodiment, with reference to the flowchart of the thin strip preparation method in fig. 2, the specific working steps of the thin strip preparation device in this technical solution are as follows:
step one, setting preset width and density of alloy strips, radius and rotating speed of a cooling roller 5, initial radius of a grabbing roller 8, initial compensation air pressure value of a spraying belt, inner cavity cross-sectional area of a nozzle package 2, alloy liquid heat preservation temperature and other spraying belt process parameters in a central control console 1;
step two, opening a steel pouring port sealing cover 16 on a ladle cover 9 of the nozzle ladle 2, controlling a valve 10 of a liquid outlet to be closed through a central control console 1, closing an air inlet valve through a gas mass flow controller 14, and driving a silicon carbide rod 12 by a silicon carbide rod heater 13 to preheat the inner cavity of the nozzle ladle 2 to the alloy liquid heat preservation temperature.
And thirdly, pouring the smelted master alloy liquid into the nozzle ladle 2 from a steel pouring port, adjusting the interval between the nozzle 4 and the cooling roller 5, and closing the steel pouring port sealing cover 16.
And fourthly, starting the cooling roller 5, the compression roller 6, the supporting roller 7 and the grabbing roller 8 through the central control console 1, opening an air inlet valve of the air mass flow controller 14, filling argon into the nozzle bag 2, and lifting the initial compensation air pressure in the nozzle bag 2 to a set initial compensation air pressure value.
And fifthly, opening a valve 10 at a liquid outlet of the nozzle bag 2, starting to spray the belt, collecting the rotating speed of the grabbing roller 8 by the central control console 1 in real time, and automatically calculating and controlling the change of the compensating air pressure in real time according to a real-time radius calculation formula and a compensating air pressure change formula of the grabbing roller 8 to realize the preparation of the constant-pressure thin belt.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and drawings, and are intended to be included within the scope of the present invention.
Claims (8)
1. The constant-pressure thin strip preparation method is characterized in that a thin strip preparation device is pre-configured, the thin strip preparation device comprises a closed nozzle bag, a cooling roller is arranged on the side surface of the nozzle bag, and a grabbing roller is arranged on one side of the cooling roller; the thin strip preparation method comprises the following steps:
controlling the nozzle package to spray alloy liquid contained in the nozzle package to the surface of the rapidly rotating cooling roller through a nozzle on the side surface of the nozzle package so as to form a solid alloy strip, and continuously introducing inert gas into the nozzle package in the process of spraying the strip so as to compensate the hydraulic pressure drop caused by the drop of the liquid level of the alloy liquid in the process of strip making;
controlling the inflow amount of the inert gas according to a pressure change equation, wherein the pressure change equation is as follows: p=p 0 +ρgW(π(r 2 v 2 /v 1 ) 2 -πr 1 2 )/A
Wherein p represents the real-time compensated air pressure value of the nozzle package, p 0 Representing the initial compensated air pressure value of the nozzle bag before the spraying of the strip, ρ representing the density of the alloy strip, g representing the gravitational acceleration, W representing the width of the alloy strip, A representing the cross-sectional area of the inner cavity of the nozzle bag, r 1 Represents the radius of the grabbing roller, r 2 Representing the radius of the chill roll, v 1 Representing the real-time rotation speed of the grabbing roller, v 2 Indicating the real-time rotational speed of the chill roll.
2. The method of producing a thin strip according to claim 1, characterized in that the method comprises the steps of:
step S1, preheating an inner cavity of the nozzle bag to a preset alloy liquid heat preservation temperature;
s2, pouring the melted alloy liquid into the nozzle package, adjusting the interval between the nozzle and the cooling roller, and then sealing the nozzle package;
s3, filling the inert gas into the nozzle bag so as to increase the actual compensating air pressure in the nozzle bag to the initial compensating air pressure value;
and S4, opening a valve of a liquid outlet of the nozzle bag, starting to spray the belt, and adjusting the inflow amount of the inert gas in real time according to the air pressure change equation in the belt spraying process so as to enable the actual compensation air pressure in the nozzle bag to be consistent with the real-time compensation air pressure value.
3. The method according to claim 2, wherein in step S4, the thin strip preparation device collects the rotational speeds of the gripping roller and the cooling roller in real time during the strip spraying process, calculates the real-time compensation air pressure value according to the air pressure variation equation and the real-time rotational speeds of the gripping roller and the cooling roller, and further adjusts the inflow amount of the inert gas in real time.
4. The method of claim 2, wherein the nozzle pack is provided with an air inlet connected to an external air inlet pipe, and the air inlet pipe is provided with a gas mass flow controller;
in the step S4, the thin strip preparation device automatically controls the valve of the gas mass flow controller according to the real-time compensated gas pressure value calculated by the gas pressure variation equation and the corresponding real-time compensated gas pressure, and adjusts the inflow amount of the inert gas in real time, so that the real-time compensated gas pressure in the nozzle bag is consistent with the calculated real-time compensated gas pressure value.
5. The method according to claim 4, wherein the actual compensating air pressure is acquired by the apparatus through an air pressure sensor provided on the nozzle pack.
6. The method according to claim 2, wherein a heater and a temperature collecting unit are further provided in the nozzle pack, and the method further comprises monitoring the actual temperature of the alloy liquid in the nozzle pack in real time by the temperature collecting unit after the step S2 is performed, and keeping the actual temperature consistent with the alloy liquid holding temperature by automatically controlling the heater.
7. The method of claim 1, wherein the inert gas is one of argon and nitrogen.
8. The method of claim 1, wherein a backup roll is provided between the chill roll and the pinch roll, and a press roll is provided between the chill roll and the backup roll.
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| CN202210760834.7A CN115041646B (en) | 2022-06-30 | 2022-06-30 | Constant-pressure thin belt preparation method |
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| CN202210760834.7A CN115041646B (en) | 2022-06-30 | 2022-06-30 | Constant-pressure thin belt preparation method |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08277403A (en) * | 1995-04-06 | 1996-10-22 | Sumitomo Special Metals Co Ltd | Production of permanent magnet alloy powder for bond magnet and apparatus therefor |
| JP2002045952A (en) * | 2000-08-02 | 2002-02-12 | Ulvac Japan Ltd | Apparatus for producing metallic strip and its production method |
| CN202461467U (en) * | 2011-11-21 | 2012-10-03 | 滕州高科康纳合金材料有限公司 | Plunger type equal liquid level pressure amorphous belt building machine |
| CN103752785A (en) * | 2014-01-21 | 2014-04-30 | 罗冉 | Rapid solidification metal strip production device and method thereof |
| CN203679199U (en) * | 2014-01-21 | 2014-07-02 | 罗冉 | Production device for rapidly-solidified metal strip |
| CN106180605A (en) * | 2016-08-30 | 2016-12-07 | 河南中岳非晶新型材料股份有限公司 | A kind of ultracrystallite strip and band method processed thereof |
| CN108145104A (en) * | 2017-12-20 | 2018-06-12 | 宁波中科毕普拉斯新材料科技有限公司 | A kind of constant pressure system band method automatically controlled |
| CN207577378U (en) * | 2017-12-20 | 2018-07-06 | 宁波中科毕普拉斯新材料科技有限公司 | A kind of constant pressure tape producing apparatus automatically controlled |
| CN108296459A (en) * | 2018-01-24 | 2018-07-20 | 河南工学院 | A kind of non-crystaline amorphous metal production autocontrol method and control device |
| CN109248995A (en) * | 2018-11-29 | 2019-01-22 | 横店集团东磁股份有限公司 | A kind of preparation method of spray belt bag and nanocrystalline strip |
| CN111531142A (en) * | 2020-06-18 | 2020-08-14 | 中南大学 | Device and method for simulating double-roller thin-strip continuous casting technological process |
| CN112170857A (en) * | 2020-09-30 | 2021-01-05 | 宁波中科毕普拉斯新材料科技有限公司 | Preparation method of fine alloy powder |
| CN114058966A (en) * | 2021-10-09 | 2022-02-18 | 山东那美新材料科技有限公司 | Method for preparing high-silicon non-oriented electrical thin strip steel based on three-roll continuous casting machine |
| WO2022088585A1 (en) * | 2020-10-27 | 2022-05-05 | 安泰非晶科技有限责任公司 | Amorphous nanocrystalline alloy strip and manufacturing method therefor |
-
2022
- 2022-06-30 CN CN202210760834.7A patent/CN115041646B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08277403A (en) * | 1995-04-06 | 1996-10-22 | Sumitomo Special Metals Co Ltd | Production of permanent magnet alloy powder for bond magnet and apparatus therefor |
| JP2002045952A (en) * | 2000-08-02 | 2002-02-12 | Ulvac Japan Ltd | Apparatus for producing metallic strip and its production method |
| CN202461467U (en) * | 2011-11-21 | 2012-10-03 | 滕州高科康纳合金材料有限公司 | Plunger type equal liquid level pressure amorphous belt building machine |
| CN103752785A (en) * | 2014-01-21 | 2014-04-30 | 罗冉 | Rapid solidification metal strip production device and method thereof |
| CN203679199U (en) * | 2014-01-21 | 2014-07-02 | 罗冉 | Production device for rapidly-solidified metal strip |
| CN106180605A (en) * | 2016-08-30 | 2016-12-07 | 河南中岳非晶新型材料股份有限公司 | A kind of ultracrystallite strip and band method processed thereof |
| CN108145104A (en) * | 2017-12-20 | 2018-06-12 | 宁波中科毕普拉斯新材料科技有限公司 | A kind of constant pressure system band method automatically controlled |
| CN207577378U (en) * | 2017-12-20 | 2018-07-06 | 宁波中科毕普拉斯新材料科技有限公司 | A kind of constant pressure tape producing apparatus automatically controlled |
| CN108296459A (en) * | 2018-01-24 | 2018-07-20 | 河南工学院 | A kind of non-crystaline amorphous metal production autocontrol method and control device |
| CN109248995A (en) * | 2018-11-29 | 2019-01-22 | 横店集团东磁股份有限公司 | A kind of preparation method of spray belt bag and nanocrystalline strip |
| CN111531142A (en) * | 2020-06-18 | 2020-08-14 | 中南大学 | Device and method for simulating double-roller thin-strip continuous casting technological process |
| CN112170857A (en) * | 2020-09-30 | 2021-01-05 | 宁波中科毕普拉斯新材料科技有限公司 | Preparation method of fine alloy powder |
| WO2022088585A1 (en) * | 2020-10-27 | 2022-05-05 | 安泰非晶科技有限责任公司 | Amorphous nanocrystalline alloy strip and manufacturing method therefor |
| CN114058966A (en) * | 2021-10-09 | 2022-02-18 | 山东那美新材料科技有限公司 | Method for preparing high-silicon non-oriented electrical thin strip steel based on three-roll continuous casting machine |
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