CN103071777A - Supersonic vibration based vacuum counter-pressure casting device and air path system thereof - Google Patents
Supersonic vibration based vacuum counter-pressure casting device and air path system thereof Download PDFInfo
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- CN103071777A CN103071777A CN2012105779060A CN201210577906A CN103071777A CN 103071777 A CN103071777 A CN 103071777A CN 2012105779060 A CN2012105779060 A CN 2012105779060A CN 201210577906 A CN201210577906 A CN 201210577906A CN 103071777 A CN103071777 A CN 103071777A
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Abstract
The invention relates to a supersonic vibration based vacuum counter-pressure casting device and an air path system thereof. The supersonic vibration based vacuum counter-pressure casting device comprises a main body part and an accessory part, wherein the main body part is mainly composed of an upper pressure can, a lower pressure can, a middle separating plate, a liquid-lifting pipe, a supersonic generating device and a base, wherein the liquid-lifting pipe is provided with a casting mounting plate and a supersonic accessing flange; the main body part is used for supplying metal liquid; the liquid-lifting pipe is used for connecting a holding furnace, melting furnace and a casting cavity; the casting cavity is placed into the upper pressure can and is mounted on the casting mounting plate; and the supersonic generating device is placed into the upper pressure can, is located between the casting mounting plate and the middle separating plate, is fixed on the liquid-lifting pipe and is sealed by using a flange. According to the invention, the supersonic wave generated by the supersonic generating device acts on the metal liquid, so that the gas generated in the metal liquid is removed through the supersonic vibration and the flowing property of the metal liquid is increased, and furthermore, a solidified dendritic crystal is broken under the effect of the supersonic vibration, the grains are refined, the casting defect is reduced and the shaping quality of the casting is increased.
Description
Technical field
The present invention relates to a kind of vacuum differential pressure casting device and air-channel system thereof based on ultrasonic vibration.
Background technology
The vacuum differential pressure casting technique is a kind of advanced person's antigravity accurate forming method, and it mainly has following advantage: (1) is easy to obtain that profile is complete, the foundry goods of dense structure.In the vacuum differential pressure casting process, molten metal improves mold-filling capacity at the vacuum condition lower charging type, and foundry goods solidifies (feeding capacity is 4-5 times of low pressure casting) under very high pressure (0.6Mpa) simultaneously, can obtain dense tissue.(2) reduce bleb, needle pore defect.Hot cracking tendency when (3) obviously reducing the large-scale complex thin-wall casting solidification.(4) the vacuum differential pressure casting can reduce setting time 20%-25%, and its crystal grain is to some extent refinement also.Northwestern Polytechnical University's counter-gravity casting equipments such as many covers adjustable pressure casting that have been the Aero-Space enterprise development have solved the key issue of some model projects.After this, the units such as the some other institution of higher learning of China such as Nanchang University of aviation, the Central China University of Science and Technology, Harbin Institute of Technology, Shenyang Institute of Technology are on the basis that the counter-pressure casting equipment and process reaches its maturity, also in research and development counter-pressure casting and vacuum differential pressure Casting Equipment.The vacuum differential pressure foundry engieering is applicable to metal mold, resin bonded sand mould, invested mould, gypsum mould etc., at present the vacuum differential pressure technology comparative maturity that is cast in metal mold, resin bonded sand mould aspect.
In recent years, the foundry goods of the various models in aircraft industry field is towards the future development of complicated, precise treatment, thin-walled property, lightweight, integration, and the shape of foundry goods becomes increasingly complex, and forming quality requires more and more higher.The product design technology levels such as aviation key components and parts such as engine crankcase body, blisk are more and more higher, this type foundry goods often is comprised of several large planes and curved surface, inside and outside shaped wall thickness ununiformity is even, particularly vestibule, oil circuit and oil circuit bend are many, and density requires very high, must carry out very high pressure experiment, guarantee non-leakage.For a certain model foundry goods, product approval need to repeatedly manufacture experimently and improve, and adopt traditional manufacturing process and technology not only to be difficult to satisfy quality and the required precision of foundry goods, and trial-produce period is long, and is expensive large.The mode of employing casting mold preheating can improve the cavity filling energy of vacuum differential pressure casting process, but part crystal grain becomes large, and performance is difficult to guarantee.
Summary of the invention
The object of the present invention is to provide a kind of vacuum differential pressure casting device and air-channel system thereof based on ultrasonic vibration, it has the advantage that reduces casting flaw, improves the casting forming quality.
The present invention is achieved like this, a kind of vacuum differential pressure casting device based on ultrasonic vibration, it comprises the upward pressure tank, casting mold, the casting mold installing plate, casting mold installing plate fixed support, central dividing plate, the insulation melting furnace, molten metal, the downforce tank, base, stalk, the ultrasonic generator mounting flange, the ultrasonic generator emitting head, downforce canister incoming gas mouth, the ultrasonic generator controller, upward pressure canister incoming gas mouth, straight pipe, ultrasonic generator ultrasonic transformer and ultrasonic generator, it is characterized in that being provided with casting mold in the upward pressure tank, the bottom of casting mold is connected on the casting mold installing plate, the support bracket fastened upper end of casting mold installing plate connects the casting mold installing plate, its lower end is connected on the upper surface of central dividing plate, be connected with upward pressure canister incoming gas mouth and straight pipe on the sidewall of upward pressure tank, the bottom of upward pressure tank is connected on the upper surface of central dividing plate, the top of downforce tank is connected on the lower surface of central dividing plate, be connected with downforce canister incoming gas mouth on the sidewall of downforce tank, be provided with the insulation melting furnace in the downforce tank, the insulation melting furnace is fixed on the base, one end of stalk is positioned at the insulation melting furnace, the other end is connected on the casting mold, stalk one side between casting mold installing plate and central dividing plate is provided with ultrasonic generator, ultrasonic generator connects the ultrasonic generator mounting flange, ultrasonic generator is by the ultrasonic generator emitting head, ultrasonic generator ultrasonic transformer and ultrasonic generator controller consist of, wherein an end of ultrasonic generator ultrasonic transformer connects the ultrasonic generator emitting head, and the other end connects the ultrasonic generator controller.A kind of air-channel system of the vacuum differential pressure casting device based on ultrasonic vibration, it comprises straight pipe, upward pressure canister incoming gas pipe, downforce canister incoming gas pipe, pressure-relief valve, vacuum valve, vavuum pump, air accumulator, upward pressure tank switch valve, downforce tank switch valve, the through swtich valve, upward pressure pressure tank control valve, downforce pressure tank control valve and communicating valve, the initiating terminal that it is characterized in that upward pressure canister incoming gas pipe connects upward pressure canister incoming gas mouth, the initiating terminal of downforce canister incoming gas pipe connects downforce canister incoming gas mouth, the end of straight pipe is connected on the air accumulator, be connected with the through swtich valve on the straight pipe, the end of upward pressure canister incoming gas pipe is connected on the air accumulator, be in series with successively from left to right upward pressure pressure tank control valve and upward pressure tank switch valve on the upward pressure canister incoming gas pipe, the end of downforce canister incoming gas pipe is connected on the air accumulator, be in series with successively from left to right downforce pressure tank control valve and downforce tank switch valve on the downforce canister incoming gas pipe, be connected with communicating valve between the initiating terminal of the initiating terminal of upward pressure canister incoming gas pipe and downforce canister incoming gas pipe, communicating valve links to each other with vacuum valve with pressure-relief valve respectively, and vacuum valve is connected with vavuum pump.
Technique effect of the present invention is: the ul-trasonic irradiation that the present invention produces ultrasonic generator is in molten metal, and ultrasonic vibration is carved and can effectively be got rid of the inner gas that produces of molten metal on the one hand, increases the mobile performance of molten metal in cavity filling process; On the other hand, " cavitation " effect that ultrasonic vibration produces also will be so that solidify the dendrite fracture, crystal grain thinning, minimizing casting flaw, raising casting forming quality.The present invention has utilized vacuum differential pressure casting Counter-gravity Mould Filling principle so that cavity filling process is steady, thereby reduces casting flaw; In filling and solidification processess, effectively foundry goods is carried out refinement thereby can apply ultrasonic vibration; This system is with the effective combination in two aspects, thereby the quality of raising foundry goods satisfies the part performance requirement.
Description of drawings
Fig. 1 is agent structure schematic diagram of the present invention.
Fig. 2 is gas circuit isoboles of the present invention.
Fig. 3 is the vacuum differential pressure foundary methods drawing based on ultrasonic vibration.
In the drawings, 1, upward pressure tank 2, casting mold 3, casting mold installing plate 4, casting mold installing plate fixed support 5, central dividing plate 6, insulation melting furnace 7, downforce tank 8, base 9, stalk 10, ultrasonic generator mounting flange 11, ultrasonic generator emitting head 12, downforce canister incoming gas mouth 13, ultrasonic generator controller 14, upward pressure canister incoming gas mouth 15, straight pipe 16, ultrasonic generator ultrasonic transformer 17, ultrasonic generator 18, pressure-relief valve 19, vacuum valve 20, vavuum pump 21, air accumulator 22, upward pressure tank switch valve 23, downforce tank switch valve 24, through swtich valve 25, upward pressure pressure tank control valve 26, downforce pressure tank control valve 27, communicating valve 28, downforce canister incoming gas pipe 29, upward pressure canister incoming gas pipe.
The specific embodiment
Below in conjunction with accompanying drawing and example specific works mode of the present invention is done further detailed elaboration, plan reaches from the vacuum differential pressure cast main body structure based on ultrasonic vibration and explains in detail based on 2 aspects of vacuum differential pressure casting technique of ultrasonic vibration;
(1) based on the vacuum differential pressure cast main body structure of ultrasonic vibration
As shown in Figure 1, mainly be to be consisted of by upward pressure tank 1, central dividing plate 5 and downforce tank 7 based on the vacuum differential pressure cast main body structure of ultrasonic vibration, central dividing plate 5 is separated into independent up and down confined space with main part.In downforce tank 7, include base 8 and holding furnace melting furnace 6, holding furnace melting furnace 6 directly is placed on the base 8, be responsible for melting metal and obtain molten metal, have downforce canister incoming gas mouth 12 in downforce tank 7 sides simultaneously, being used for downforce tank 7 provides and regulates pressure
In upward pressure tank 1, include the assemblies such as ultrasonic generator 17 and casting mold 2, casting mold 2 is fixed on the casting mold installing plate 3, casting mold installing plate 3 is fixed on the central dividing plate 5 by casting mold installing plate fixed support 4, stalk 9 is installed on above the casting mold installing plate 3 by flange, and pass in the holding furnace melting furnace 6 that central dividing plate 5 stretches into downforce tank 7, be used for molten metal is imported the die cavity of casting mold 2, ultrasonic generator 17 is fixed in crucible wall by ultrasonic generator mounting flange 10 with ultrasonic generator emitting head 11, fore-end is stretched in the molten metal, and be connected to ultrasonic generator controller 13 by ultrasonic generator ultrasonic transformer 16, whole ultrasonic generator 17 between casting mold installing plate 3 and central dividing plate 5, thereby make molten metal enter that casting mold 2 is front to be brought supersonic source in the foundry goods into.In upward pressure tank 1 side 2 air inlets are arranged, straight pipe 15 and upward pressure canister incoming gas mouth 14, wherein straight pipe 15 is used for directly ventilation, mainly be because upward pressure tank 1 pressure-raising is larger, the pressed gas that needs is more, and upward pressure canister incoming gas mouth 14 then is mainly used in regulating provides and regulate pressure in the upward pressure tank 1
(2) based on the vacuum differential pressure casting technique of ultrasonic vibration
As shown in Figure 2, the initiating terminal of upward pressure canister incoming gas pipe 29 connects upward pressure canister incoming gas mouth 14, the initiating terminal of downforce canister incoming gas pipe 28 connects downforce canister incoming gas mouth 12, the end of straight pipe 15 is connected on the air accumulator 21, be connected with through swtich valve 24 on the straight pipe 15, the end of upward pressure canister incoming gas pipe 29 is connected on the air accumulator 21, be in series with successively from left to right upward pressure pressure tank control valve 25 and upward pressure tank switch valve 22 on the upward pressure canister incoming gas pipe 29, the end of downforce canister incoming gas pipe 29 is connected on the air accumulator 21, be in series with successively from left to right downforce pressure tank control valve 26 and downforce tank switch valve 23 on the downforce canister incoming gas pipe 28, be connected with communicating valve 27 between the initiating terminal of the initiating terminal of upward pressure canister incoming gas pipe 29 and downforce canister incoming gas pipe 28, communicating valve 27 links to each other with vacuum valve 19 with pressure-relief valve 18 respectively, and vacuum valve 19 is connected with vavuum pump 20.
Vacuum differential pressure casting technique based on ultrasonic vibration mainly comprises 5 stages: vacuumize, type is filled in ultrasonic vibration, ultrasonic vibration is boosted, ultrasonic vibration pressurize and release, wherein ultrasonicly then mainly filling type, boosting and 3 stages of pressurize apply, be used for improving mold-filling capacity and casting forming quality, such as Fig. 3.Its specific implementation process is:
1) vacuumizes: the communicating valve 27 between downforce canister incoming gas pipe 28 and the upward pressure canister incoming gas pipe 29 is opened, at this moment the pressure in upward pressure tank 1 and the downforce tank 7
With
All be
, namely environmental pressure is opened vacuum valve 19 and vavuum pump 20 simultaneously, the gas of body interior is discharged, according to varying in size of part, will so that
=
=1-10KPa; Then vacuum valve 19, vavuum pump 20 and communicating valve 27 are closed, enter the next stage ultrasonic vibration and fill type;
2) type is filled in ultrasonic vibration: open downforce tank switch valve 23 and downforce tank control valve 26,21 pairs of downforce tanks 7 of air accumulator are filled with gas, and downforce tank 7 and upward pressure tank 1 will form a pressure reduction this moment
-
=
, molten metal under pressure will be by stalk 9 and through entering in the casting mold 2, wherein behind the ultrasonic generator emitting head 11
Size and metal species, casting mold 2 sizes relevant with resistance coefficient, general value is at 10-50KPa; When passing into pressed gas, open ultrasonic generator controller 13, supersonic source is added in the molten metal by ultrasonic generator emitting head 11 through ultrasonic generator ultrasonic transformer 16, form multi-form supersonic source thereby can change ultrasonic power, concrete form can be constant power
, perhaps adopt the trigonometric function pattern, perhaps adopt rectangular pattern, perhaps adopt pulse mode (cutting in and out), power can
With
Between change, form the supersonic source that intensity constantly changes, thereby strengthen the ultrasonic vibration effect, reduce the viscosity of molten metal, improve mold-filling capacity.
3) ultrasonic vibration boost phase: the ultrasonic aspect that applies continues to keep ultrasonic generator 17 power supply openings, and can change the different ultrasonic modes that applies, simultaneously also can be by changing
With
Size strengthen or reduce the intensity of supersonic source.Upward pressure tank switch valve 22 and upward pressure tank control valve 25 are opened in pressed gas adding aspect, and upward pressure tank 1 and downforce tank 7 boost simultaneously by control valve separately, and the downforce tank 7 and upward pressure tank 1 pressure reduction that keep setting are
, because upward pressure tank 1 volume is larger, for Quick relative superiority or inferiority pressurized tank pressure, can carry out ftercompction to upward pressure tank 1 by opening the through swtich valve, pressure tank 7 reaches dwell pressure instantly
=
The time, enter packing stage, to close gas and pass into valve, generally select this moment
For about 200-600KPa, make up pressure time about 1-2min.
4) ultrasonic vibration packing stage: to fill type the same with the ultrasonic vibration boost phase with ultrasonic vibration, continues to keep ultrasonic generator 17 power supply openings, and can change the different ultrasonic modes that applies, simultaneously also can be by changing
With
Size further strengthen or reduce the intensity of supersonic source.Pressed gas adding aspect, downforce tank 7 pressure are
, because the equipment sealing problem, upward pressure tank 1 and downforce tank 7
With
Have minor swing, should by the suitable supplementary pressure gas of control valve separately, keep downforce tank 7 and upward pressure tank 1 pressure reduction to be
Until molten metal solidifies fully, it is about 1-30min that this process continues the duration.
5) release: after molten metal solidifies fully, close ultrasonic generator 17, simultaneously the communicating valve 27 between upward pressure tank 1 and the downforce tank 7 and pressure-relief valve 18 are opened, the force value of upward pressure tank 1 and downforce tank 7 is reverted to
, open again upward pressure tank 1, take out foundry goods.
Claims (2)
1. vacuum differential pressure casting device based on ultrasonic vibration, it comprises the upward pressure tank, casting mold, the casting mold installing plate, casting mold installing plate fixed support, central dividing plate, the insulation melting furnace, molten metal, the downforce tank, base, stalk, the ultrasonic generator mounting flange, the ultrasonic generator emitting head, downforce canister incoming gas mouth, the ultrasonic generator controller, upward pressure canister incoming gas mouth, straight pipe, ultrasonic generator ultrasonic transformer and ultrasonic generator, it is characterized in that being provided with casting mold in the upward pressure tank, the bottom of casting mold is connected on the casting mold installing plate, the support bracket fastened upper end of casting mold installing plate connects the casting mold installing plate, its lower end is connected on the upper surface of central dividing plate, be connected with upward pressure canister incoming gas mouth and straight pipe on the sidewall of upward pressure tank, the bottom of upward pressure tank is connected on the upper surface of central dividing plate, the top of downforce tank is connected on the lower surface of central dividing plate, be connected with downforce canister incoming gas mouth on the sidewall of downforce tank, be provided with the insulation melting furnace in the downforce tank, the insulation melting furnace is fixed on the base, one end of stalk is positioned at the insulation melting furnace, the other end is connected on the casting mold, stalk one side between casting mold installing plate and central dividing plate is provided with ultrasonic generator, ultrasonic generator connects the ultrasonic generator mounting flange, ultrasonic generator is by the ultrasonic generator emitting head, ultrasonic generator ultrasonic transformer and ultrasonic generator controller consist of, wherein an end of ultrasonic generator ultrasonic transformer connects the ultrasonic generator emitting head, and the other end connects the ultrasonic generator controller.
2. the air-channel system of a kind of vacuum differential pressure casting device based on ultrasonic vibration as claimed in claim 1, it comprises straight pipe, upward pressure canister incoming gas pipe, downforce canister incoming gas pipe, pressure-relief valve, vacuum valve, vavuum pump, air accumulator, upward pressure tank switch valve, downforce tank switch valve, the through swtich valve, upward pressure pressure tank control valve, downforce pressure tank control valve and communicating valve, the initiating terminal that it is characterized in that upward pressure canister incoming gas pipe connects upward pressure canister incoming gas mouth, the initiating terminal of downforce canister incoming gas pipe connects downforce canister incoming gas mouth, the end of straight pipe is connected on the air accumulator, be connected with the through swtich valve on the straight pipe, the end of upward pressure canister incoming gas pipe is connected on the air accumulator, be in series with successively from left to right upward pressure pressure tank control valve and upward pressure tank switch valve on the upward pressure canister incoming gas pipe, the end of downforce canister incoming gas pipe is connected on the air accumulator, be in series with successively from left to right downforce pressure tank control valve and downforce tank switch valve on the downforce canister incoming gas pipe, be connected with communicating valve between the initiating terminal of the initiating terminal of upward pressure canister incoming gas pipe and downforce canister incoming gas pipe, communicating valve links to each other with vacuum valve with pressure-relief valve respectively, and vacuum valve is connected with vavuum pump.
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| CN201210577906.0A CN103071777B (en) | 2012-12-27 | 2012-12-27 | A kind of Vacuum Differential Pressure Casting manufacturing process based on ultrasonic vibration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103878341A (en) * | 2014-03-27 | 2014-06-25 | 哈尔滨工业大学 | Large cylindrical shell aluminum alloy casting low-pressure casting and shrinking control device |
| CN105258507A (en) * | 2015-10-14 | 2016-01-20 | 上海大学 | Device and method for controlling flowing of high-temperature materials |
| CN108237215A (en) * | 2018-01-22 | 2018-07-03 | 繁昌县琪鑫铸造有限公司 | A kind of casting vibrating device |
| CN109434077A (en) * | 2018-12-27 | 2019-03-08 | 南昌航空大学 | A kind of vacuum pressing and casting forming device and air-channel system based on electromagnetic field |
| CN110769952A (en) * | 2017-06-16 | 2020-02-07 | 麦格纳国际公司 | Die casting furnace system with ultrasonic unit for improving molten metal quality |
| CN111054897A (en) * | 2020-01-06 | 2020-04-24 | 广西润启互联网科技有限公司 | Die-casting equipment for 5G automobile parts |
| CN113333715A (en) * | 2021-05-28 | 2021-09-03 | 重庆长安汽车股份有限公司 | Low-pressure casting mold-filling pressure curve design method based on back pressure |
| CN114058993A (en) * | 2021-11-24 | 2022-02-18 | 山西江淮重工有限责任公司 | Ultrasonic treatment device and ultrasonic treatment method for high-temperature melt |
| CN115608965A (en) * | 2022-10-31 | 2023-01-17 | 哈尔滨工业大学 | Anti-gravity light alloy pouring method with ultrasonic mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878341A (en) * | 2014-03-27 | 2014-06-25 | 哈尔滨工业大学 | Large cylindrical shell aluminum alloy casting low-pressure casting and shrinking control device |
| CN105258507A (en) * | 2015-10-14 | 2016-01-20 | 上海大学 | Device and method for controlling flowing of high-temperature materials |
| CN105258507B (en) * | 2015-10-14 | 2017-05-31 | 上海大学 | A kind of high-temperature material flow control apparatus and method |
| CN110769952A (en) * | 2017-06-16 | 2020-02-07 | 麦格纳国际公司 | Die casting furnace system with ultrasonic unit for improving molten metal quality |
| CN108237215A (en) * | 2018-01-22 | 2018-07-03 | 繁昌县琪鑫铸造有限公司 | A kind of casting vibrating device |
| CN109434077A (en) * | 2018-12-27 | 2019-03-08 | 南昌航空大学 | A kind of vacuum pressing and casting forming device and air-channel system based on electromagnetic field |
| CN111054897A (en) * | 2020-01-06 | 2020-04-24 | 广西润启互联网科技有限公司 | Die-casting equipment for 5G automobile parts |
| CN113333715A (en) * | 2021-05-28 | 2021-09-03 | 重庆长安汽车股份有限公司 | Low-pressure casting mold-filling pressure curve design method based on back pressure |
| CN113333715B (en) * | 2021-05-28 | 2022-11-04 | 重庆长安汽车股份有限公司 | Low-pressure casting mold-filling pressure curve design method based on back pressure |
| CN114058993A (en) * | 2021-11-24 | 2022-02-18 | 山西江淮重工有限责任公司 | Ultrasonic treatment device and ultrasonic treatment method for high-temperature melt |
| CN114058993B (en) * | 2021-11-24 | 2024-03-15 | 山西江淮重工有限责任公司 | Ultrasonic treatment device and ultrasonic treatment method for high-temperature melt |
| CN115608965A (en) * | 2022-10-31 | 2023-01-17 | 哈尔滨工业大学 | Anti-gravity light alloy pouring method with ultrasonic mechanism |
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