CN109676098B - One-furnace multi-ingot casting device and method for vacuum induction furnace - Google Patents
One-furnace multi-ingot casting device and method for vacuum induction furnace Download PDFInfo
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- CN109676098B CN109676098B CN201910166271.7A CN201910166271A CN109676098B CN 109676098 B CN109676098 B CN 109676098B CN 201910166271 A CN201910166271 A CN 201910166271A CN 109676098 B CN109676098 B CN 109676098B
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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
- B22D9/00—Machines or plants for casting ingots
- B22D9/003—Machines or plants for casting ingots for top casting
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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
- B22D39/00—Equipment for supplying molten metal in rations
- B22D39/04—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by weight
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Abstract
A vacuum induction furnace one-furnace multi-ingot casting device and a method thereof are disclosed, the device comprises a vacuum seal tank, an induction furnace body, an electric turntable, a support rod, a funnel-shaped flow damper, a chute, a mold fixing frame and a casting riser; the funnel-shaped current retarder is arranged on the electric turntable through the supporting rod, one end of the chute is connected with the funnel-shaped current retarder, the lower portion of the chute is provided with a heating coil, the molds are distributed annularly by taking the electric turntable as a center, the other end of the chute is positioned right above the pouring riser, and the weighing mechanism is arranged below the molds. The method comprises the following steps: the method comprises the following steps of sequentially hoisting a set number of moulds and pouring risers onto a mould fixing frame in a vacuum sealing tank, zeroing a weighing mechanism, adding metal raw materials into an induction furnace body, sealing the vacuum sealing tank and vacuumizing, melting the metal raw materials to a set temperature, leading molten metal into the moulds by a tilting induction furnace body, starting temperature compensation when the weight of the molten metal in the moulds reaches a set value 2/3, repeating the casting process until the casting of all the moulds is finished.
Description
Technical Field
The invention belongs to the technical field of smelting and casting, and particularly relates to a one-furnace multi-ingot casting device and method for a vacuum induction furnace.
Background
The vacuum induction furnace is used as a common vacuum device for smelting special materials, and melts metal raw materials in the furnace body by generating eddy current in the electromagnetic induction process so as to achieve the aim of smelting high-purity metal and alloy; with the improvement of the capacity of smelting equipment, most of the currently common vacuum induction furnaces are tonnage furnaces, and the corresponding casting molds of the vacuum induction furnaces are multiple, so that the following problems often occur in the casting process due to the independence of a casting system of the vacuum induction furnaces: firstly, in the casting process, a mould cannot be quickly and accurately placed below a casting nozzle; secondly, in the process of converting the die, the metal in the furnace body can generate temperature drop, thereby causing energy waste; thirdly, the molten metal in the mould easily produces "bridging" phenomenon in the solidification process, and along with going on of casting, the molten metal temperature in the furnace body is lower, will unable to solidify the feeding "under the bridge", therefore the casting produces quality problems such as loose and shrinkage cavity easily in the mould to it is lower to lead to the finished product rate.
To this end, those skilled in the art have devised various apparatus and methods for one-furnace multi-ingot casting, the following being illustrative:
the Chinese patent application with the publication number of CN105964956A discloses a method for smelting and casting a steel ingot in a vacuum induction furnace, wherein a circular guide rail is arranged in a furnace body, a casting vehicle is arranged on the guide rail, the casting vehicle moves in the guide rail through the extension and retraction of a hydraulic rod at one end, a mold can be accurately placed below a casting nozzle, and the quality problems of steel ingot shrinkage cavity and the like are avoided through the arrangement of the bottom communication of an ingot mold; however, the structure is more complicated due to the additional need of an in-furnace casting car and an out-furnace hydraulic rod, and when the number of cast molds is too large, the load quality of the hydraulic rod is also required to be higher.
The Chinese patent application with the publication number of CN203900455U discloses a rotary pouring mechanism of a vacuum induction furnace, wherein a plurality of molds are arranged on a rotary tray, and the molds are sequentially rotated to the lower part of a pouring nozzle through the movement of the rotary tray, so that multi-mold pouring is carried out; however, in the later stage of casting, the problem of ingot quality caused by the temperature reduction of the metal liquid cannot be avoided by the scheme, and the stress of the rotary tray becomes uneven along with the progress of casting, so that the accelerated abrasion of the rotary bearing is caused, and the consumption of smelting cost is increased.
The Chinese patent application with the publication number of CN205128856U discloses a casting and shunting device for producing high-temperature master alloy, which is characterized in that a diversion trench and a shunting disc are designed, molten steel is stably distributed to the shunting disc through the diversion trench, and then the molten steel is cast into each mould; however, the scheme is only to simply shunt the molten steel, the weight of each cast ingot cannot be accurately controlled, and in the later stage of casting, the quality problems such as shrinkage cavity and the like caused by low temperature of the molten steel cannot be avoided.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a one-furnace multi-ingot casting device and a one-furnace multi-ingot casting method for a vacuum induction furnace, which can quickly cast molten metal in a furnace body into a mold on the premise of ensuring that the mold does not move, and can supplement the temperature of the molten metal before the molten metal is cast into the mold in the later casting period, so that even if the molten metal in the mold generates a bridge-building phenomenon in the solidification process, the molten metal after temperature supplement can also perform solidification and feeding on the under-bridge phenomenon, thereby improving the ingot casting quality.
In order to achieve the purpose, the invention adopts the following technical scheme: a one-furnace multi-ingot casting device of a vacuum induction furnace comprises a vacuum sealing tank, an induction furnace body, an electric rotary table, a support rod, a funnel-shaped flow damper, a chute, a mold fixing frame and a casting riser; the electric turntable is arranged at the bottom of the vacuum sealing tank, the supporting rod is vertically and fixedly arranged on the electric turntable, and the funnel-shaped flow damper is fixedly arranged at the top of the supporting rod; the mold fixing frames are a plurality of in number, the mold fixing frames are uniformly distributed in the circumferential direction by taking the electric turntable as the center, a mold is placed on each mold fixing frame, and the top of each mold is provided with a pouring riser; one end of the chute is connected to the funnel-shaped flow retarder, the other end of the chute is positioned right above the casting riser, and the lower part of the chute is provided with a heating coil; the electric turntable is used for driving the supporting rod, the funnel-shaped flow damper and the chute to synchronously rotate.
A weighing mechanism is installed between the mould fixing frame and the tank bottom of the vacuum sealing tank, and a high-temperature-resistant heat-insulating gasket is installed between the mould fixing frame and the weighing mechanism.
The die is characterized in that two U-shaped clamping grooves are symmetrically formed in the die fixing frame, two lifting lugs are symmetrically arranged on the die and are clamped and matched with the U-shaped clamping grooves, and the die is hoisted through the lifting lugs.
And two lifting rings are symmetrically arranged on the pouring riser, and the pouring riser is hoisted through the lifting rings.
A one-furnace multi-ingot casting method of a vacuum induction furnace adopts the one-furnace multi-ingot casting device of the vacuum induction furnace, and comprises the following steps:
the method comprises the following steps: sequentially hoisting a set number of moulds to a mould fixing frame in a vacuum sealing tank, and ensuring that lifting lugs on the moulds accurately enter U-shaped clamping grooves on the mould fixing frame;
step two: hoisting a set number of pouring risers to the mold in sequence to ensure that the pouring risers are accurately butted with the mold;
step three: starting the electric turntable, and controlling the supporting rod, the funnel-shaped flow damper and the chute to synchronously rotate, so that the liquid outlet end of the chute is positioned right above the first pouring riser;
step four: zeroing all weighing mechanisms;
step five: adding metal raw materials into the furnace body of the induction furnace;
step six: sealing the vacuum sealing tank to finish the vacuum pumping in the tank;
step seven: starting the furnace body of the induction furnace to generate eddy current so as to melt the metal raw material in the furnace body of the induction furnace until the molten metal in the furnace body of the induction furnace reaches a set temperature;
step eight: tilting the furnace body of the induction furnace to enable molten metal in the furnace body of the induction furnace to enter a mold sequentially through a funnel-shaped flow damper, a chute and a pouring riser;
step nine: when the real-time weight value measured by the weighing mechanism reaches 2/3 of the set weight value, starting the heating coil, and supplementing the temperature of the molten metal flowing through the chute through the heating coil;
step ten: when the real-time weight value measured by the weighing mechanism reaches a set weight value, the induction furnace body is reset, and the heating coil is powered off;
step eleven: starting the electric turntable, controlling the supporting rod, the funnel-shaped flow damper and the chute to synchronously rotate, and moving the liquid outlet end of the chute to be right above the next pouring riser;
step twelve: repeating the eighth step to the eleventh step until the casting work of all the molds is completed;
step thirteen: and after the ingot in all the molds is cooled, opening the vacuum seal tank, taking all the molds out of the vacuum seal tank in sequence, demolding all the molds, and finishing the one-furnace multi-ingot casting process.
The invention has the beneficial effects that:
according to the one-furnace multi-ingot casting device and method for the vacuum induction furnace, disclosed by the invention, the molten metal in the furnace body can be rapidly cast into the mold on the premise that the mold does not move, and the temperature of the molten metal can be supplemented before the molten metal is cast into the mold at the later stage of casting, so that even if the molten metal in the mold generates a bridge-building phenomenon in the solidification process, the molten metal after temperature supplementation can be solidified and fed under the bridge, and the quality of cast ingots is improved.
Drawings
FIG. 1 is a schematic structural diagram of a vacuum induction furnace one-furnace multi-ingot casting device according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is an assembly view of a weighing mechanism, a high temperature resistant heat insulating spacer, a mold fixing frame, a mold and a casting riser;
in the figure, 1-a vacuum seal tank, 2-an induction furnace body, 3-an electric turntable, 4-a support rod, 5-a funnel-shaped flow damper, 6-a chute, 7-a mold, 8-a mold fixing frame, 9-a pouring riser, 10-a heating coil, 11-a weighing mechanism, 12-a high-temperature resistant heat insulation gasket, 13-a U-shaped clamping groove, 14-a lifting lug and 15-a lifting ring.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1 to 3, a one-furnace multi-ingot casting device for a vacuum induction furnace comprises a vacuum seal tank 1, an induction furnace body 2, an electric rotary table 3, a support rod 4, a funnel-shaped flow damper 5, a chute 6, a mold 7, a mold fixing frame 8 and a casting riser 9; the electric rotary table 3 is arranged at the bottom of the vacuum sealing tank 1, the support rod 4 is vertically and fixedly arranged on the electric rotary table 3, and the funnel-shaped flow damper 5 is fixedly arranged at the top of the support rod 4; the number of the die fixing frames 8 is multiple, the die fixing frames 8 are uniformly distributed in the circumferential direction by taking the electric turntable 3 as the center, a die 7 is placed on each die fixing frame 8, and a pouring riser 9 is arranged at the top of each die 7; one end of the chute 6 is connected to the funnel-shaped flow damper 5, the other end of the chute 6 is positioned right above the casting riser 9, and the lower part of the chute 6 is provided with a heating coil 10; the electric rotary table 3 is used for driving the support rod 4, the funnel-shaped flow damper 5 and the chute 6 to synchronously rotate.
A weighing mechanism 11 is installed between the mould fixing frame 8 and the bottom of the vacuum sealing tank 1, and a high-temperature-resistant heat-insulating gasket 12 is installed between the mould fixing frame 8 and the weighing mechanism 11.
The die fixing frame 8 is symmetrically provided with two U-shaped clamping grooves 13, the die 7 is symmetrically provided with two lifting lugs 14, the lifting lugs 14 are clamped and matched with the U-shaped clamping grooves 13, and the die 7 is hoisted through the lifting lugs 14.
Two lifting rings 15 are symmetrically arranged on the pouring riser 9, and the pouring riser 9 is lifted through the lifting rings 15.
A one-furnace multi-ingot casting method of a vacuum induction furnace adopts the one-furnace multi-ingot casting device of the vacuum induction furnace, and comprises the following steps:
the method comprises the following steps: sequentially hoisting a set number of moulds 7 onto a mould fixing frame 8 in the vacuum sealing tank 1, and ensuring that lifting lugs 14 on the moulds 7 accurately enter U-shaped clamping grooves 13 on the mould fixing frame 8;
step two: hoisting a set number of pouring risers 9 to the mold 7 in sequence to ensure that the pouring risers 9 are accurately butted with the mold 7;
step three: starting the electric turntable 3, controlling the support rod 4, the funnel-shaped flow damper 5 and the chute 6 to synchronously rotate, and enabling the liquid outlet end of the chute 6 to be positioned right above the first pouring riser 9;
step four: zeroing all weighing means 11;
step five: adding metal raw materials into the induction furnace body 2;
step six: sealing the vacuum sealing tank 1 to finish the vacuum pumping in the tank;
step seven: starting the induction furnace body 2 to generate eddy current so as to melt the metal raw material in the induction furnace body 2 until the molten metal in the induction furnace body 2 reaches a set temperature;
step eight: tilting the induction furnace body 2 to enable molten metal in the induction furnace body 2 to sequentially enter a mold 7 through a funnel-shaped flow damper 5, a chute 6 and a pouring riser 9;
step nine: when the real-time weight value measured by the weighing mechanism 11 reaches 2/3 of the set weight value, the heating coil 10 is started, and the metal liquid flowing through the chute 6 is subjected to temperature compensation through the heating coil 10;
step ten: when the real-time weight value measured by the weighing mechanism 11 reaches the set weight value, the induction furnace body 2 is reset, and the heating coil 10 is powered off;
step eleven: starting the electric turntable 3, controlling the support rod 4, the funnel-shaped flow damper 5 and the chute 6 to synchronously rotate, and moving the liquid outlet end of the chute 6 to be right above the next pouring riser 9;
step twelve: repeating the eighth step to the eleventh step until the casting work of all the molds 7 is completed;
step thirteen: and after the ingot in all the molds 7 is cooled, opening the vacuum sealing tank 1, taking all the molds 7 out of the vacuum sealing tank 1 in sequence, demolding all the molds 7, and finishing the one-furnace multi-ingot casting process.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.
Claims (2)
1. The utility model provides a vacuum induction furnace stove many ingots casting device which characterized in that: the device comprises a vacuum sealing tank, an induction furnace body, an electric rotary table, a supporting rod, a funnel-shaped flow damper, a chute, a mold fixing frame and a pouring riser; the electric turntable is arranged at the bottom of the vacuum sealing tank, the supporting rod is vertically and fixedly arranged on the electric turntable, and the funnel-shaped flow damper is fixedly arranged at the top of the supporting rod; the mold fixing frames are a plurality of in number, the mold fixing frames are uniformly distributed in the circumferential direction by taking the electric turntable as the center, a mold is placed on each mold fixing frame, and the top of each mold is provided with a pouring riser; one end of the chute is connected to the funnel-shaped flow retarder, the other end of the chute is positioned right above the casting riser, and the lower part of the chute is provided with a heating coil; the electric turntable is used for driving the supporting rod, the funnel-shaped flow damper and the chute to synchronously rotate; a weighing mechanism is arranged between the mould fixing frame and the bottom of the vacuum sealing tank, and a high-temperature-resistant heat-insulating gasket is arranged between the mould fixing frame and the weighing mechanism; the die fixing frame is symmetrically provided with two U-shaped clamping grooves, the die is symmetrically provided with two lifting lugs, the lifting lugs are clamped and matched with the U-shaped clamping grooves, and the die is hoisted through the lifting lugs; and two lifting rings are symmetrically arranged on the pouring riser, and the pouring riser is hoisted through the lifting rings.
2. A vacuum induction furnace one-furnace multi-ingot casting method adopts the vacuum induction furnace one-furnace multi-ingot casting device of claim 1, and is characterized by comprising the following steps:
the method comprises the following steps: sequentially hoisting a set number of moulds to a mould fixing frame in a vacuum sealing tank, and ensuring that lifting lugs on the moulds accurately enter U-shaped clamping grooves on the mould fixing frame;
step two: hoisting a set number of pouring risers to the mold in sequence to ensure that the pouring risers are accurately butted with the mold;
step three: starting the electric turntable, and controlling the supporting rod, the funnel-shaped flow damper and the chute to synchronously rotate, so that the liquid outlet end of the chute is positioned right above the first pouring riser;
step four: zeroing all weighing mechanisms;
step five: adding metal raw materials into the furnace body of the induction furnace;
step six: sealing the vacuum sealing tank to finish the vacuum pumping in the tank;
step seven: starting the furnace body of the induction furnace to generate eddy current so as to melt the metal raw material in the furnace body of the induction furnace until the molten metal in the furnace body of the induction furnace reaches a set temperature;
step eight: tilting the furnace body of the induction furnace to enable molten metal in the furnace body of the induction furnace to enter a mold sequentially through a funnel-shaped flow damper, a chute and a pouring riser;
step nine: when the real-time weight value measured by the weighing mechanism reaches 2/3 of the set weight value, starting the heating coil, and supplementing the temperature of the molten metal flowing through the chute through the heating coil;
step ten: when the real-time weight value measured by the weighing mechanism reaches a set weight value, the induction furnace body is reset, and the heating coil is powered off;
step eleven: starting the electric turntable, controlling the supporting rod, the funnel-shaped flow damper and the chute to synchronously rotate, and moving the liquid outlet end of the chute to be right above the next pouring riser;
step twelve: repeating the eighth step to the eleventh step until the casting work of all the molds is completed;
step thirteen: and after the ingot in all the molds is cooled, opening the vacuum seal tank, taking all the molds out of the vacuum seal tank in sequence, demolding all the molds, and finishing the one-furnace multi-ingot casting process.
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| CN110640130B (en) * | 2019-08-30 | 2021-06-08 | 益阳鸿源稀土有限责任公司 | Rare earth metal molten liquid pouring system |
| CN112325639A (en) * | 2020-11-04 | 2021-02-05 | 湖南中联志远车轮有限公司 | Metal casting furnace |
| CN113547089B (en) * | 2021-07-22 | 2022-08-16 | 重庆市机电设计研究院 | Quantitative pouring device for metal ingot production |
| CN114101604B (en) * | 2021-12-08 | 2023-08-18 | 贵州航天新力科技有限公司 | One-furnace multi-casting device of small vacuum induction furnace and use method thereof |
| CN114309498B (en) * | 2021-12-28 | 2023-10-20 | 江苏隆达超合金航材有限公司 | Flow distribution disc for pouring master alloy of high-temperature alloy |
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