CN102717051A - Pressure adjusting precision casting device of high temperature alloy complex thin wall casts - Google Patents
Pressure adjusting precision casting device of high temperature alloy complex thin wall casts Download PDFInfo
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- CN102717051A CN102717051A CN2012102195062A CN201210219506A CN102717051A CN 102717051 A CN102717051 A CN 102717051A CN 2012102195062 A CN2012102195062 A CN 2012102195062A CN 201210219506 A CN201210219506 A CN 201210219506A CN 102717051 A CN102717051 A CN 102717051A
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Abstract
The invention discloses a pressure adjusting precision casting device of high temperature alloy complex thin wall casts. The device comprises a medium frequency induction heating power supply, a pressure adjusting furnace, a pressure adjusting tank body lifting system, a pressure adjusting gas channel control system, a vacuum system and a gas tank. An upper tank body and a lower tank body in the pressure adjusting furnace are separated through a middle partition plate, and the medium frequency induction heating power supply is used for melting alloy and is connected with the lower tank body of the pressure adjusting furnace. The pressure adjusting furnace tank body lifting system is arranged above the pressure adjusting furnace and used for lifting the upper tank body. The pressure adjusting furnace is provided with a ventilation hole connected with the pressure adjusting gas channel control system on the outer portion of the pressure adjusting furnace. The pressure adjusting gas channel control system is sequentially connected with the vacuum system and the gas tank to achieve vacuum degree of pressure adjustment of the pressure adjusting furnace. The pressure adjusting precision casting device can effectively improve material utilization ratio, provides space for end-approaching cleaning casting, resolves the filling problems in casting of the complex thin wall casts, especially improves filling capability of the thin wall casts with the wall thickness smaller than 3mm, and is high in accuracy.
Description
Technical field
What the present invention relates to is a kind of pressure regulation hot investment casting device of high temperature alloy complex thin-wall foundry goods, and particularly a kind of pressure regulation technology of utilizing is carried out high-temperature alloy thin-section casting precision-investment casting device, belongs to the casting speciality field.
Background technology
Along with aviation, space flight, navigation; Automobile, the high speed development of medical treatment and petrochemical industry cause, high-performance; Special substance; The demand of high precision size degree and high quality casting day by day increases, and high-end hot investment casting is the important means that satisfies this demand, and the foundry goods thin-walled property is the developing direction of modern foundry engieering.The unconventional weight requirement and the high-end founding materials of high temperature alloy of high accuracy to size are all challenged to domestic existing hot investment casting equipment and technology.
For example; Britain AE PLC has used a series of complex thin-wall precision castings on novel aerospace craft; The appearance and size of these precision castings is generally at 300～600mm, and minimum wall thickness (MINI W.) reaches 0.8～1.5mm, and can control crystallite dimension; Be aided with hot isostatic pressing technique, improved the fatigue life of foundry goods significantly.U.S. Hitchiner company, PCC company and Howmet company are that U.S.'s GE engine has been cast a series of large thin-wall single-casting, and wherein minimum wall thickness (MINI W.) is far below domestic similar foundry goods.Basis is preferably being arranged abroad aspect the precise forming equipment of large and complex structure spare, but all the time China is being carried out strict blockade on new techniques, so autonomous innovation is the only way of China's development heavy castings precision casting technology.
At home, adjustable pressure casting has obtained successful Application as a kind of advanced person's casting technique on aluminium alloy large-sized foundry goods and magnesium alloy large-sized foundry goods.But aluminium alloy and magnesium alloy all belong to light metal, and the pressure that needs when adopting gravitational casting is low to be realized than being easier to.High temperature alloy density is bigger, and the pressure that adjustable pressure casting needs is big, and the device fabrication difficulty is bigger.Present domestic this type of device that still do not have.Utilize this device can obtain the rule that influences to melt fluidised form, filling behavior and feeding capacity such as running gate system under the pressure regulation condition, pouring technology and pressure regulation parameter; Explore high temperature alloy complex thin-wall foundry goods pressure regulation hot investment casting Design of Runner System principle and method; Realize the breakthrough of high temperature alloy complex thin-wall foundry goods pressure regulation precision molding technology, promote a large amount of complex thin-wall foundry goods hot investment casting equipments of using of China's space flight and aviation industrial circle.
Through the literature search of prior art is found: application number is that 01209399.8 Chinese invention patent relates to a kind of vacuum and protective gas circulation compression casting device, and this installs based on magnesium alloy cast, has overcome the problems such as problem, slag inclusion and pore of oxidation.The Design of device thinking remains based on application number 88106919.1 patents and proposes, and mode of heating and structural design also can't satisfy the requirement of high temperature alloy precision-investment casting.Because in high temperature alloy antigravity adjustable pressure casting device, the stalk material is selected and elevated-temperature seal is two hang-ups.Stalk is the passage of casting mold in liquid metal and the last jar that connects in following jar of the adjustable pressure casting device, and stalk charges into casting mold in impressed pressure effect lower edge to make molten metal.The stalk Material Selection is most important.
The patent No. is that 200820232358.7 utility model patent relates to a kind of quasi pressure adjusting casting machine, and it is lower that this patent is mentioned the adjustable pressure casting installation cost that is designed, and is applicable to aluminium alloy thin-walled casting.But the pressure control of this patent in filling type and solidifying can not reach desired pressure reduction in moment, fails to realize the instantaneous adjusting of pressure truly, so the called after quasi pressure adjusting casting machine.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of high temperature alloy complex thin-wall foundry goods adjustable pressure casting device is provided, to satisfy the requirement of high temperature alloy precision-investment casting.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is:
High temperature alloy complex thin-wall foundry goods adjustable pressure casting device of the present invention comprises: intermediate frequency induction heating power supply, pressure regulation stove, pressure regulation retort body elevator system, pressure regulation air-path control system, vacuum system and gas tank; Wherein: the last lower tank in the pressure regulation stove separates through median septum, adopts the movable joint lead screw to clamp between upper and lower tank body and the central dividing plate; Intermediate frequency induction heating power supply is used for melted alloy, is connected to the lower tank of pressure regulation stove; Pressure regulation retort body elevator system is arranged on pressure regulation stove top, is used to promote upper tank body; The pressure regulation stove is provided with passage, and this passage is connected to the pressure regulation air-path control system; The pressure regulation air-path control system is connected with vacuum system, gas tank successively, realizes that vacuum and the pressure in the pressure regulation stove is regulated.
Among the present invention, upper tank body is a vault construction, wherein the flange separator edge be equipped with lower tank on the corresponding dowel hole of alignment pin.Be welded with the hanger that supplies handling to use on the vault, and be furnished with suspender.Having one on the upper tank body sidepiece housing bleeds or air-filled pore.
Among the present invention, casting mold and stalk are installed in the upper tank body, stalk passes in the alumina crucible of median septum entering lower tank.
Among the present invention, a sand net is installed in the middle of the inner casing of casting mold and upper tank body.The casting mold upper end is laid foundary weight and is used for pressing solidly casting mold.
Among the present invention, the Medium frequency induction coil is installed in the lower tank, is placed the alumina crucible that melted alloy is used in the Medium frequency induction coil, the Medium frequency induction coil is connected with intermediate frequency induction heating power supply through lower tank.
Among the present invention, upper tank body and lower tank have passage, and in lower tank, temperature thermocouple are housed.
Among the present invention, pressure regulation stove disposed outside has vacuum system and pressure regulation air-path control system.The pressure regulation air-path control system realizes that by computer software control the pressure in the pressure regulation process changes.
The present invention has substantive distinguishing features and marked improvement, and the present invention has the following advantages:
(1) high temperature alloy pressure regulation precision-investment casting device utilizes that vacuum pre-treatment, negative pressure are filled type, pressure regulation is solidified; Means such as malleation feeding realize steadily efficiently filling type; Realize the foundry goods consecutive solidification, can effectively promote material use efficient, realize that nearly eventually clean shape casting provides the space.
(2) the adjustable pressure casting device can adopt negative pressure to fill type; And realization malleation feeding under the minimum differntial pressure principle; Thereby reduced requirement to mould permeability and intensity; Can produce the complicacy, thin-walled, the bulk metal foundry goods that are difficult to pour into a mould with other forming methods, solve the filling problem in the complex thin-wall casting pouring.Particularly wall thickness there is very big lifting less than the stowage capacity of the thin-section casting of 3mm.
(3) utilize high temperature alloy complex thin-wall pressure regulation hot investment casting device can obtain the high precision casting of dimensional accuracy, casting accuracy can reach between the CT4-CT6.
Description of drawings
Fig. 1 is a high temperature alloy adjustable pressure casting device floor plan.
Fig. 2 is a high temperature alloy adjustable pressure casting furnace accretion composition.
Among the figure: intermediate frequency induction heating power supply 1, pressure regulation stove 2, electric hoist 3, pressure regulation air-path control system 4, vacuum system 5, gas tank 6, casting mold 7; Median septum 8, upper tank body 9, lower tank 10, movable joint lead screw 11; Medium frequency induction coil 12, crucible 13, stalk 14, sand net 15; Foundary weight 16, passage 17 and 18, temperature thermocouple 19.
The specific embodiment
Elaborate in the face of embodiments of the invention down, present embodiment is that prerequisite is implemented with technical scheme of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As depicted in figs. 1 and 2, adjustable pressure casting device of the present invention comprises six major parts: intermediate frequency induction heating power supply 1, pressure regulation stove 2, pressure regulation retort body elevator system, pressure regulation air-path control system 4, vacuum system 5 and gas tank 6.Wherein: the last lower tank in the pressure regulation stove 2 separates through median septum, adopts the movable joint lead screw to clamp between upper and lower tank body and the central dividing plate; Intermediate frequency induction heating power supply 1 is used for melted alloy, is connected to the lower tank of pressure regulation stove 2; Pressure regulation retort body elevator system is arranged on pressure regulation stove 2 tops, is used to promote upper tank body; Pressure regulation stove 2 is provided with passage, and this passage is connected to pressure regulation air-path control system 4; Pressure regulation air-path control system 4 is connected with vacuum system 5, gas tank 6 successively, realizes that vacuum and the pressure in the pressure regulation stove is regulated.
In the present embodiment, the intermediate frequency induction heating power supply induction heating apparatus is made up of induction coil, fixed electrode, water-cooled cable, intermediate frequency power supply, crucible etc.Induction coil and crucible place pressure regulation stove 2 lower tanks 10 inside.
In the present embodiment, pressure regulation retort body elevator system adopts electric hoist 3 to realize.Upper tank body 9 goes up and down by the electric hoist control that is positioned at directly over the pressure regulation stove 2.
Present embodiment utilizes intermediate frequency induction heating power supply 1 melted alloy, and median septum 8 separates two tank bodies 9,10 up and down, when casting mold 7 is installed with stalk 14, utilizes electric hoist to promote upper tank body 9.Install, utilize pressure regulation air-path control system 4, vacuum system 5 and gas tank 6 to realize vacuum and pressure adjusting in the pressure regulation stove.
Specific embodiments of the present invention is following:
Electric hoist 3 places directly over the pressure regulation stove 2, and median septum 8 is separated the upper tank body 9 of pressure regulation stove 2 with lower tank 10.Adopt 8 movable joint lead screw 11 to clamp between upper tank body 9, lower tank 10 and the central dividing plate 8.
Pressure regulation stove 2 body of heater disposed outside have vacuum system 5 (2XZ-15 vavuum pump, valve, pipeline, filter, vacuum tank, compositions such as ball valve) and pressure regulation air-path control system 4.Pressure regulation air-path control system 4 realizes that by computer software control the pressure in the pressure regulation process changes.
When the present embodiment said apparatus is used for high temperature alloy complex thin-wall foundry goods adjustable pressure casting,, casting mold and stalk are preheated to 400 ℃ ~ 900 ℃ in external resistance furnace earlier according to different formwork materials; Utilize electric hoist to open on the pressure regulation stove jar, simultaneously stalk is passed median septum and put well, on the oblique flange face of stalk, coat absorbent cotton then, casting mold is placed on the stalk fixes, in the sand net, pour sand into, put foundary weight going up on the firm bonnet of casting mold jar; In the alloy melt during stalk inserted following jar, immediately will be up and down jar between locking, simultaneously to about jar and crucible vacuumize; When vacuum reaches requirement, charge into argon gas in the jar downwards, prevent alloy oxidation, and make molten alloy under the effect of pressure reduction, be pressed into the casting mold die cavity along stalk; After filling type and accomplishing, keeping under the constant condition of jar vacuum up and down, pressure tank is up and down regulated, promptly applying argon gas makes its pressure change malleation rapidly into from negative pressure, and according to arts demand, maintains the malleation value of setting; After casting solidification is accomplished, to crucible and vacuum (-tight) housing release, open loam cake immediately, casting mold and sand are poured out, and separated.After the cooling with the foundry goods demoulding.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (10)
1. a high temperature alloy complex thin-wall foundry goods hot investment casting device is characterized in that comprising: intermediate frequency induction heating power supply, pressure regulation stove, pressure regulation retort body elevator system, pressure regulation air-path control system, vacuum system and gas tank; Wherein: the last lower tank in the pressure regulation stove separates through median septum, adopts the movable joint lead screw to clamp between upper and lower tank body and the central dividing plate; Intermediate frequency induction heating power supply is used for melted alloy, is connected to the lower tank of pressure regulation stove; Pressure regulation retort body elevator system is arranged on pressure regulation stove top, is used to promote upper tank body; The pressure regulation stove is provided with passage, and this passage is connected to the outside pressure regulation air-path control system of pressure regulation stove; The pressure regulation air-path control system is connected with vacuum system, gas tank successively, realizes that vacuum and the pressure in the pressure regulation stove is regulated.
2. high temperature alloy complex thin-wall foundry goods hot investment casting device according to claim 1; It is characterized in that: said upper tank body is a vault construction; Wherein the flange separator edge be equipped with lower tank on the corresponding dowel hole of alignment pin, be welded with the hanger that supplies handling to use on the vault, and be furnished with suspender.
3. high temperature alloy complex thin-wall foundry goods hot investment casting device according to claim 2 is characterized in that: have one on the said upper tank body sidepiece housing and bleed or air-filled pore.
4. high temperature alloy complex thin-wall foundry goods hot investment casting device according to claim 2 is characterized in that: casting mold and stalk are installed in the said upper tank body, and stalk passes in the crucible of median septum entering lower tank.
5. high temperature alloy complex thin-wall foundry goods hot investment casting device according to claim 4 is characterized in that: a sand net is installed in the middle of the inner casing of said casting mold and upper tank body.
6. high temperature alloy complex thin-wall foundry goods hot investment casting device according to claim 4 is characterized in that: said casting mold upper end is laid foundary weight and is used for pressing solidly casting mold.
7. according to each described high temperature alloy complex thin-wall foundry goods hot investment casting device of claim 1-6; It is characterized in that: the Medium frequency induction coil is installed in the said lower tank; Place the alumina crucible that melted alloy is used in the Medium frequency induction coil, the Medium frequency induction coil is connected with intermediate frequency induction heating power supply through lower tank.
8. according to each described high temperature alloy complex thin-wall foundry goods hot investment casting device of claim 1-6, it is characterized in that: said upper tank body and lower tank have passage.
9. according to each described high temperature alloy complex thin-wall foundry goods hot investment casting device of claim 1-6, it is characterized in that: in the said lower tank temperature thermocouple is housed.
10. high temperature alloy complex thin-wall foundry goods hot investment casting device according to claim 1; It is characterized in that: said pressure regulation stove disposed outside has vacuum system and pressure regulation air-path control system; The pressure regulation air-path control system realizes that by computer software control the pressure in the pressure regulation process changes.
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| CN2012102195062A CN102717051A (en) | 2012-06-28 | 2012-06-28 | Pressure adjusting precision casting device of high temperature alloy complex thin wall casts |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071777A (en) * | 2012-12-27 | 2013-05-01 | 南昌航空大学 | Supersonic vibration based vacuum counter-pressure casting device and air path system thereof |
| CN103231017A (en) * | 2013-04-07 | 2013-08-07 | 上海交通大学 | High-temperature alloy complex thin-wall casting precise casting device |
| CN103302242A (en) * | 2013-06-18 | 2013-09-18 | 上海交通大学 | Precise casing method of tiles of floating wall of combustion chamber of aeroengine |
| CN104001902A (en) * | 2014-05-05 | 2014-08-27 | 上海交通大学 | Integrated high-temperature alloy pressure regulating precision casting device |
| CN104690249A (en) * | 2015-03-16 | 2015-06-10 | 河南科技大学 | Copper alloy vacuum counter-pressure casting machine |
| CN105665680A (en) * | 2016-04-06 | 2016-06-15 | 杨卫东 | Resistance furnace and control 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 |
| CN107321961A (en) * | 2017-07-27 | 2017-11-07 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of aluminium alloy thin-walled casting semi solid-state forming machine of crucible furnace formula compression solidification |
| CN108015225A (en) * | 2017-11-02 | 2018-05-11 | 中国航发哈尔滨东安发动机有限公司 | A kind of method for casting aluminium alloy of composite mould |
| CN108097922A (en) * | 2017-12-20 | 2018-06-01 | 西北工业大学 | A kind of metal-base composites vacuum low-pressure casting device and casting method |
| 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 |
| 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 |
| CN112548074A (en) * | 2019-09-26 | 2021-03-26 | 沈阳铸造研究所有限公司 | Pressure-regulating filling type high-pressure solidification casting device and casting method |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071777A (en) * | 2012-12-27 | 2013-05-01 | 南昌航空大学 | Supersonic vibration based vacuum counter-pressure casting device and air path system thereof |
| CN103071777B (en) * | 2012-12-27 | 2016-04-13 | 南昌航空大学 | A kind of Vacuum Differential Pressure Casting manufacturing process based on ultrasonic vibration |
| CN103231017A (en) * | 2013-04-07 | 2013-08-07 | 上海交通大学 | High-temperature alloy complex thin-wall casting precise casting device |
| CN103231017B (en) * | 2013-04-07 | 2015-10-28 | 上海交通大学 | A kind of high temperature alloy complex thin wall castings hot investment casting device |
| CN103302242A (en) * | 2013-06-18 | 2013-09-18 | 上海交通大学 | Precise casing method of tiles of floating wall of combustion chamber of aeroengine |
| CN104001902A (en) * | 2014-05-05 | 2014-08-27 | 上海交通大学 | Integrated high-temperature alloy pressure regulating precision casting device |
| CN104690249A (en) * | 2015-03-16 | 2015-06-10 | 河南科技大学 | Copper alloy vacuum counter-pressure casting machine |
| CN105665680A (en) * | 2016-04-06 | 2016-06-15 | 杨卫东 | Resistance furnace and control 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 |
| CN107321961A (en) * | 2017-07-27 | 2017-11-07 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of aluminium alloy thin-walled casting semi solid-state forming machine of crucible furnace formula compression solidification |
| CN108015225A (en) * | 2017-11-02 | 2018-05-11 | 中国航发哈尔滨东安发动机有限公司 | A kind of method for casting aluminium alloy of composite mould |
| CN108097922A (en) * | 2017-12-20 | 2018-06-01 | 西北工业大学 | A kind of metal-base composites vacuum low-pressure casting device and casting method |
| 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 |
| CN112548074A (en) * | 2019-09-26 | 2021-03-26 | 沈阳铸造研究所有限公司 | Pressure-regulating filling type high-pressure solidification casting device and casting method |
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Application publication date: 20121010 |