CN104001902A - Integrated high-temperature alloy pressure regulating precision casting device - Google Patents
Integrated high-temperature alloy pressure regulating precision casting device Download PDFInfo
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Abstract
The invention provides an integrated high-temperature alloy pressure regulating precision casting device. The device comprises a temperature control system, a pressure regulating furnace and a pressure regulating gas line control system, and the temperature control system comprises a pressure regulating in-furnace temperature measuring system, a resistor heating system and an intermediate-frequency induction heating system, wherein the resistor heating system and the pressure regulating in-furnace temperature measuring system are used for preheating a liquid lifting pipe and a profile shell, and the intermediate-frequency induction heating system is used for melting alloy. The pressure regulating furnace is composed of an upper tank, a lower tank and a middle separation plate. One end of the pressure regulating gas line control system is connected with vent holes of the upper tank and the lower tank of the pressure regulating furnace, the other end of the pressure regulating gas line control system is connected with a vacuum system and an inertia gas source in sequence, and the pressure regulating gas line control system is used for controlling the vacuum degree and pressure in the pressure regulating furnace. According to the integrated high-temperature alloy pressure regulating precision casting device, the whole pressure regulating casting process can be carried out in vacuum, the possibility of alloy oxidization is reduced, near net forming casting is achieved, and the filling capacity of a thin-wall casting can be improved obviously.
Description
Technical field
The present invention relates to casting speciality field, particularly, relate to a kind of integral type high temperature alloy pressure regulation hot investment casting device.
Background technology
In recent years, the high speed development along with fields such as Aeronautics and Astronautics, oil, chemical industry, naval vessel, automobiles, more and more embodies following characteristics to the requirement of high-temperature alloy thin-section casting: (1) lightweight; (2) integration; (3) precise treatment.Adapt with it, high temperature alloy complex thin-wall foundry goods has huge development prospect.
For high-temperature alloy thin-section casting, the Laplce's power being caused by liquid alloy surface tension and viscous force have great impact to filling the flow regime of type, improved the difficulty that aluminium alloy fills type, very easily there is various casting flaw, and the complicated structure of thin-section casting itself makes mold filling pressure be difficult to be distributed accurately, the mobile shortage of alloy liquid is effectively controlled., and pressure-adjusting casting method is fairly obvious for the effect that improves thin-section casting quality therefore.Utilize this device can obtain the rule that affects on melt filling behavior and feeding capacity such as running gate system, pouring technology, explore complex thin-wall foundry goods pressure regulation precision casting pouring system principle and method, realize the saving of complex thin-wall foundry goods, manufacture efficiently.
Through the literature search of prior art is found: the Chinese invention patent that application number is 200410009617.6 relates to a kind of pressure-adjusting casting method and adjustable pressure casting crucible, this patent is mentioned designed adjustable pressure casting device and is substantially applicable to the fusing points such as aluminium alloy compared with low-alloy, can prevent to a certain extent the generation of pore, shrinkage porosite.But the design of the aspects such as the alloy melting of this patent part, elevated-temperature seal, pressure curve adjustment link cannot meet the requirement of high temperature alloy precision-investment casting.
Application number is that 201310036959.6 Chinese invention patent relates to a kind of complex alloys aluminium casting thin foundry goods technique, and this device, based on aluminium alloy casting design, has overcome the problems such as slag inclusion and pore to a certain extent.The casting process of this patent is that the pouring type filling velocity that adopts clearance type and bottom filling to combine is 60～80mm/s, and pouring temperature is 715～725 ℃.But this technique cannot be suitable for for high temperature alloy, the Counter-gravity Mould Filling speed of high temperature alloy will be far below the speed of this patent, and pouring temperature exceeds this patent more than 1 times.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of integral type high temperature alloy pressure regulation hot investment casting device, can guarantee that adjustable pressure casting process whole process carries out under vacuum, reduce the possibility of alloy oxidation, realize nearly whole net shape casting, can significantly promote the stowage capacity of thin-section casting.
For realizing above object, the invention provides a kind of integral type high temperature alloy pressure regulation hot investment casting device, this device comprises: temperature control system, pressure regulation stove, pressure regulation air-path control system, wherein: described temperature control system comprises temp measuring system, resistive heating system and Frequency Induction Heating system in pressure regulation stove, and in described pressure regulation stove, temp measuring system comprises contact temperature-measuring system and contactless temperature-measuring system; Described pressure regulation stove is comprised of upper tank body, lower tank and the median septum of stacking successively, and adopts movable joint lead screw to clamp between upper tank body, median septum, lower tank; Described pressure regulation air-path control system one end is connected with pressure regulation stove, the other end is connected with inertia source of the gas successively with vacuum system, for controlling vacuum and the pressure in pressure regulation stove;
Described contact temperature-measuring system is arranged at the median septum downside of pressure regulation stove, for preheating stalk and shell, guarantees that whole pressure regulation process is without abolishing vacuum condition; Described contactless temperature-measuring system, described Frequency Induction Heating system are all arranged in the lower tank of pressure regulation stove, Frequency Induction Heating system is built-in for melted alloy crucible, described contactless temperature-measuring system is arranged at the top of crucible, for measuring in real time aluminium alloy temperature; Described resistive heating system is arranged at respectively in the upper tank body of pressure regulation stove and median septum downside.
Preferably, described Frequency Induction Heating system is comprised of Medium frequency induction coil, fixed electrode, water-cooled cable, intermediate frequency induction heating power supply, crucible, wherein: it is inner that Medium frequency induction coil and crucible are arranged at pressure regulation stove lower tank, and crucible is built in Medium frequency induction coil, for melted alloy.
Preferably, described upper tank body is vault construction, and the inside top of upper tank body is welded with in order to pressure ring fastening, that compress sandbox, on the vault of upper tank body, is welded with hanger.
Preferably, casting mold and stalk are installed in described upper tank body, stalk enters in the crucible of lower tank through median septum, resistive heating system; In the middle of the inner casing of casting mold and upper tank body, sandbox is installed, and sandbox is arranged in the resistive heating system of upper tank body, sandbox upper end is provided with the foundary weight that presses solidly casting mold.
Preferably, automatic rising-sinking platform is also installed in described lower tank, automatic rising-sinking platform is for crucible up and down, in order to improve aluminium alloy utilization ratio, to reduce the time in stalk bottom immersion aluminium alloy.
Preferably, in described median septum, be provided with the dowel hole corresponding with upper and lower tank body alignment pin.
Preferably, described upper and lower tank body is equipped with passage, and upper and lower tank body is connected to pressure regulation air-path control system by passage.
Preferably, described resistive heating system place is equipped with contact temperature-measuring system, in order to measure the preheat temperature of sandbox, stalk, is convenient to the implementation of casting process; And above crucible, flame-retardant fibre board place is provided with contactless temperature-measuring system, measures in real time the temperature of alloy, is convenient to the temperature of temperature control system Based Intelligent Control aluminium alloy.
In the present invention, be provided with preheating shell, stalk is heated by resistive system, abolishes the process that vacuum environment is installed shell, stalk after having avoided alloy melting to complete, and subtracts low-alloyed degree of oxidation; Meanwhile, in lower tank, be provided with automatic rising-sinking platform, can control in real time bushing position, put forward heavy alloyed utilization ratio, reduce stalk and aluminium alloy time of contact, lifting process reliability simultaneously.
Compared with prior art, the present invention has following beneficial effect:
(1) real time temperature that can effectively realize aluminium alloy, casting mold, stalk is controlled, and that has improved adjustable pressure casting process can be handling.
(2) stopped the link that aluminium alloy produces oxidation, the generation of the defect such as can effectively reduce oxidation, pore in foundry goods, be mingled with.
(3) reduce the time that stalk contacts with aluminium alloy, reduced the technological requirement to stalk, improved the utilization rate of aluminium alloy simultaneously.
Accompanying drawing explanation
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is high temperature alloy adjustable pressure casting unit layout figure;
Fig. 2 is high temperature alloy adjustable pressure casting furnace accretion composition;
In figure: temperature control system 1, pressure regulation stove 2, pressure regulation air-path control system 3, upper tank body 4, resistive heating system 5, sandbox 6, movable joint lead screw 7, median septum 8, fastening bolt 9, automatic rising-sinking platform 10, lower tank 11, foundary weight 12, quartz sand 13, shell 14, passage 15, alignment pin 16, stalk 17, contact temperature-measuring system 18, flame-retardant fibre board 19, contactless temperature-measuring system 20, alumina crucible 21, passage 22, Frequency Induction Heating system 23.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art further to understand the present invention, but not limit in any form the present invention.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
As shown in Figure 1 and Figure 2, the present embodiment provides a kind of integral type high temperature alloy pressure regulation hot investment casting device, comprises three major parts: temperature control system 1, pressure regulation stove 2 and pressure regulation air-path control system 3, concrete:
Described temperature control system 1 comprises contact temperature-measuring system 18, contactless temperature-measuring system 20, resistive heating system 5 and Frequency Induction Heating system 23, wherein: contact temperature-measuring system 18 is fixed on median septum 8 downsides of pressure regulation stove 2, for preheating stalk 17 and shell 14, guarantee that whole pressure regulation process is without abolishing vacuum condition; Resistive heating system 5 is separately fixed in the upper tank body 4 of pressure regulation stove 2 downside with median septum 8; Contactless temperature-measuring system 20, Frequency Induction Heating system 23 are installed in lower tank 10, the built-in crucible 21 for melted alloy of Frequency Induction Heating system 23, and contactless temperature-measuring system 20 is arranged on crucible 21 tops, for measuring in real time aluminium alloy temperature.
Described pressure regulation stove 2 comprises upper tank body 4, median septum 8 and the lower tank 11 of stacking successively, and median septum 8 is separated the upper tank body of pressure regulation stove 24 and lower tank 11; Between upper tank body 4, median septum 8, lower tank 11, adopt 8 movable joint lead screw 7 to clamp.
Described pressure regulation air-path control system 3 is arranged at pressure regulation stove 2 bodies of heater outsides, and its one end is connected with pressure regulation stove 2, and the other end is connected successively with vacuum system, inertia source of the gas, for regulating vacuum and the pressure in pressure regulation stove 2; Pressure regulation air-path control system 3 is by computer software control, and the pressure of realizing in pressure regulation process changes.
In the present embodiment, described upper tank body 4 is vault construction, outer wall, inner pressure ring material selection 1Cr18Ni9Ti corrosion resistant plate, and median septum 8 adopts 16MnR pressure vessel special-purpose steel, and structural pressure is all manufactured by 1.0MPa pressure design.Median septum 8 be equipped with 3 with 3 dowel holes that alignment pin 16 is corresponding on upper tank body 4, lower tank 11.The inside top of upper tank body 4 is welded with in order to pressure ring fastening, that compress sandbox, is welded with 3 for the hanger of handling on vault.
In the present embodiment, the interior installation casting mold 14 of described upper tank body 4 and stalk 17, stalk 17 enters in the crucible 21 of lower tank 11 through median septum 8, resistive heating system 5; In the middle of the inner casing of casting mold 14 and upper tank body 4, sandbox 6 is installed, and sandbox 6 is arranged in upper tank body 4 resistive heating system 5; Sandbox 6 upper ends are provided with foundary weight 12 and are used for pressing solidly casting mold 14.
In the present embodiment, described upper tank body 4 is provided with passage 15, lower tank 11 is provided with passage 22, and passage 15,22 is all connected to pressure regulation air-path control system 3.
In the present embodiment, described Frequency Induction Heating system 23 is comprised of Medium frequency induction coil, fixed electrode, water-cooled cable, intermediate frequency induction heating power supply, crucible 21, Medium frequency induction coil is built-in with the crucible 21 that melted alloy is used, Medium frequency induction coil and crucible 21 are all arranged at lower tank 11 inside of pressure regulation stove 2, and Medium frequency induction coil is connected with intermediate frequency induction heating power supply through lower tank 11.
In the present embodiment, in described lower tank 11, be also provided with automatic rising-sinking platform 10, automatic rising-sinking platform 10 is for crucible up and down 21, in order to improve aluminium alloy utilization ratio, to reduce the time in stalk 17 bottoms immersion aluminium alloys.
The present embodiment, after stalk 17, casting mold 14 install, utilizes pressure regulation air-path control system 3 to regulate pressure regulation stove 2 interior vacuums; Temperature control system 1 preheating stalk 17 and casting mold 14, melted alloy; The vacuum and the pressure that when alloy reaches pouring temperature, utilize pressure regulation air-path control system 3 to realize in pressure regulation stove 2 regulate.
When the present embodiment said apparatus is used for high-temperature alloy casting adjustable pressure casting, first open the lower tank 11 of pressure regulation stove 2, alloy is packed in crucible 21, automatic rising-sinking platform 10 is adjusted to correct position; Median septum 8 is installed, stalk 17 is put well through median septum 8, stalk 17 boss downsides are placed refractory seals pad; Sandbox 6 is placed on to correct position, casting mold 14 is placed in sandbox 6 and is docked with stalk 17, stalk 17 boss place parcel refractory seals pad and aluminium oxide coating; In sandbox 6, pour quartz sand 13 into, put foundary weight 12, upper tank body 4 on suitable bonnet is adjusted in position, by locking between upper and lower tank body 4,11, makes effective sealing between upper tank body 4, lower tank 11, shell 14, stalk 17; Upper tank body 4, lower tank 11 are vacuumized; By resistive heating system 5 preheating stalks 17 and casting mold 14, to suitable temperature, be incubated 1 hour; Melted alloy, to suitable temperature, is filled with argon gas in lower tank 11, prevents alloy oxidation, and makes molten alloy along stalk 17, be pressed into casting mold 14 die cavities under the effect of pressure reduction; After filling type and completing, under the condition that upper tank body 4, lower tank 11 vacuums are constant, upper tank body 4, lower tank 11 pressure are regulated keeping, it is applying argon gas, make its pressure change rapidly malleation into from negative pressure, and according to technique needs, maintain the malleation value of setting; Adjust median septum downside resistive heating system 5 heating-up temperatures simultaneously, prevent the interior alloy graining of stalk 17; After casting solidification completes, to upper and lower tank body 4,11 releases, make the interior aluminium alloy of stalk 17 pass back into crucible 21 immediately, open upper tank body 4, cooling after by casting mold 14 and quartz sand 13 pour out, separated, by the foundry goods demoulding.
Above specific embodiments of the invention are described.It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or modification within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (8)
1. an integral type high temperature alloy pressure regulation hot investment casting device, it is characterized in that, comprise: temperature control system, pressure regulation stove, pressure regulation air-path control system, wherein: described temperature control system comprises temp measuring system, resistive heating system and Frequency Induction Heating system in pressure regulation stove, and in described pressure regulation stove, temp measuring system comprises contact temperature-measuring system and contactless temperature-measuring system; Described pressure regulation stove is comprised of upper tank body, lower tank and the median septum of stacking successively, and adopts movable joint lead screw to clamp between upper tank body, median septum, lower tank; Described pressure regulation air-path control system one end is connected with pressure regulation stove, the other end is connected with inertia source of the gas successively with vacuum system, for controlling vacuum and the pressure in pressure regulation stove;
Described contact temperature-measuring system is arranged at the median septum downside of pressure regulation stove, for preheating stalk and shell, guarantees that whole pressure regulation process is without abolishing vacuum condition; Described contactless temperature-measuring system, described Frequency Induction Heating system are all arranged in the lower tank of pressure regulation stove, the built-in crucible for melted alloy of Frequency Induction Heating system, described contactless temperature-measuring system is arranged at the top of crucible, for measuring in real time aluminium alloy temperature; Described resistive heating system is arranged at respectively in the upper tank body of pressure regulation stove and median septum downside.
2. a kind of integral type high temperature alloy pressure regulation hot investment casting device according to claim 1, it is characterized in that, described Frequency Induction Heating system is comprised of Medium frequency induction coil, fixed electrode, water-cooled cable, intermediate frequency induction heating power supply, crucible, wherein: it is inner that Medium frequency induction coil and crucible are arranged at pressure regulation stove lower tank, and crucible is built in Medium frequency induction coil, for melted alloy.
3. a kind of integral type high temperature alloy pressure regulation hot investment casting device according to claim 1, is characterized in that, described upper tank body is vault construction, and the inside top of upper tank body is welded with in order to pressure ring fastening, that compress sandbox, on the vault of upper tank body, is welded with hanger.
4. according to a kind of integral type high temperature alloy pressure regulation hot investment casting device described in claim 1 or 3, it is characterized in that, shell and stalk are installed in described upper tank body, stalk enters in the crucible of lower tank through median septum, resistive heating system; In the middle of the inner casing of casting mold and upper tank body, sandbox is installed, and sandbox is arranged in the resistive heating system in upper tank body, sandbox upper end is provided with the foundary weight that presses solidly casting mold.
5. a kind of integral type high temperature alloy pressure regulation hot investment casting device according to claim 1, it is characterized in that, automatic rising-sinking platform is also installed in described lower tank, automatic rising-sinking platform is for crucible up and down, in order to improve aluminium alloy utilization ratio, to reduce the time in stalk bottom immersion aluminium alloy.
6. a kind of integral type high temperature alloy pressure regulation hot investment casting device according to claim 1, is characterized in that, described upper and lower tank body is equipped with passage, and upper and lower tank body is connected to pressure regulation air-path control system by passage.
7. a kind of integral type high temperature alloy pressure regulation hot investment casting device according to claim 1, is characterized in that, described resistive heating system place is equipped with contact temperature-measuring system, in order to measure the preheat temperature of sandbox, stalk, is convenient to the implementation of casting process; And above crucible, flame-retardant fibre board place is provided with contactless temperature-measuring system, measures in real time the temperature of alloy, is convenient to the temperature of temperature control system Based Intelligent Control aluminium alloy.
8. a kind of integral type high temperature alloy pressure regulation hot investment casting device according to claim 1, is characterized in that, is provided with the dowel hole corresponding with upper and lower tank body alignment pin in described median septum.
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| CN201410186654.8A CN104001902B (en) | 2014-05-05 | 2014-05-05 | Integral type high temperature alloy pressure regulation hot investment casting device |
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| CN201410186654.8A CN104001902B (en) | 2014-05-05 | 2014-05-05 | Integral type high temperature alloy pressure regulation hot investment casting device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105710344A (en) * | 2016-04-14 | 2016-06-29 | 北京北冶功能材料有限公司 | Vacuum casting device for high-temperature alloy base materials and application method |
| CN106424657A (en) * | 2016-09-07 | 2017-02-22 | 上海华培动力科技有限公司 | Pressure-adjustable casting method for producing black metal casting |
| CN107900311A (en) * | 2017-11-10 | 2018-04-13 | 湖北三江航天万峰科技发展有限公司 | Thin-walled nacelle monolithic molding mould and its manufacturing process |
| CN110421144A (en) * | 2019-08-21 | 2019-11-08 | 上海交通大学 | A kind of high temperature alloy floating wall tile precision casting under adjustable pressure method of additional electromagnetic field effect |
| CN111203514A (en) * | 2020-01-10 | 2020-05-29 | 谷英梅 | Precision casting method for high-temperature alloy complex thin-wall casting |
| CN111375743A (en) * | 2018-12-29 | 2020-07-07 | 沈阳铸造研究所有限公司 | Casting device and precision casting method for high-temperature alloy part with complex structure |
| CN111799961A (en) * | 2020-06-19 | 2020-10-20 | 重庆金康动力新能源有限公司 | Motor rotor and end ring casting equipment and method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105710344A (en) * | 2016-04-14 | 2016-06-29 | 北京北冶功能材料有限公司 | Vacuum casting device for high-temperature alloy base materials and application method |
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| CN107900311A (en) * | 2017-11-10 | 2018-04-13 | 湖北三江航天万峰科技发展有限公司 | Thin-walled nacelle monolithic molding mould and its manufacturing process |
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| CN111375743A (en) * | 2018-12-29 | 2020-07-07 | 沈阳铸造研究所有限公司 | Casting device and precision casting method for high-temperature alloy part with complex structure |
| CN111375743B (en) * | 2018-12-29 | 2022-05-10 | 沈阳铸造研究所有限公司 | Casting device and precision casting method for high-temperature alloy part with complex structure |
| CN110421144A (en) * | 2019-08-21 | 2019-11-08 | 上海交通大学 | A kind of high temperature alloy floating wall tile precision casting under adjustable pressure method of additional electromagnetic field effect |
| CN111203514A (en) * | 2020-01-10 | 2020-05-29 | 谷英梅 | Precision casting method for high-temperature alloy complex thin-wall casting |
| CN111799961A (en) * | 2020-06-19 | 2020-10-20 | 重庆金康动力新能源有限公司 | Motor rotor and end ring casting equipment and method thereof |
| CN111799961B (en) * | 2020-06-19 | 2023-09-19 | 重庆金康动力新能源有限公司 | Motor rotor and end ring casting equipment and method thereof |
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