CN109719278A - Agitating type vacuum fine grain foundry furnace and its application method - Google Patents
Agitating type vacuum fine grain foundry furnace and its application method Download PDFInfo
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- CN109719278A CN109719278A CN201910210853.0A CN201910210853A CN109719278A CN 109719278 A CN109719278 A CN 109719278A CN 201910210853 A CN201910210853 A CN 201910210853A CN 109719278 A CN109719278 A CN 109719278A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009415 formwork Methods 0.000 claims abstract description 156
- 230000007246 mechanism Effects 0.000 claims abstract description 64
- 238000003756 stirring Methods 0.000 claims abstract description 41
- 238000013019 agitation Methods 0.000 claims abstract description 40
- 238000005266 casting Methods 0.000 claims abstract description 37
- 238000002844 melting Methods 0.000 claims abstract description 28
- 230000008018 melting Effects 0.000 claims abstract description 28
- 230000003028 elevating effect Effects 0.000 claims abstract description 25
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- 239000000956 alloy Substances 0.000 claims description 17
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
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- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005495 investment casting Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 238000005498 polishing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
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- 238000011105 stabilization Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The invention belongs to aircraft industry fine grain castings production apparatus field more particularly to a kind of agitating type vacuum fine grain foundry furnace and its application methods, including upper furnace chamber (1), lower furnace chamber (2), upper furnace chamber vacuum system (8) and lower furnace chamber vacuum system (9)；Formwork heater (3) and formwork temperature measuring equipment (10) are equipped in upper furnace chamber (1)；Melting coil (5), formwork stirring mechanism (6) and formwork elevating mechanism (7) are equipped in lower furnace chamber (2)；Formwork stirring mechanism (6) is fixed at lower furnace chamber (2) bottom center region；Formwork stirring mechanism (6) includes formwork agitation driving unit (11) and annular agitation pallet (601)；Formwork lifting disk (701) are fixed at the top of formwork elevating mechanism (7)；Formwork lifting disk (701) is equipped with formwork (14)；High production efficiency of the present invention, equipment dynamic stability is good, and global reliability is strong, easy to maintain.
Description
Technical field
The invention belongs to aircraft industry fine grain castings production apparatus field more particularly to a kind of agitating type vacuum fine grain foundry furnaces
And its application method.High temperature alloy fine grain castings production needed for being mainly used in aerospace and relevant industries.
Background technique
The main purpose of fine grain casting is the low cycle fatigue property in order to improve casting.Using high shell temperature and casting
Temperature, isometric fine grain casting is obtained by the agitation Mechanical Crushing casting crystalline grain of casting mold, and casting degree of purity is high.This technology master
It is used for the key positions such as aerospace engine.The equipment generally uses vertical structure, and furnace body is placed on workbench.Casting mold
Elevating mechanism is placed in melt pit, and vacuum system is placed on work ground.To reinforce rigidity, shell adds bee snail and T-type muscle.Inner wall and
Fire door flange is by fine polishing, convenient for removing melting volatile matter.Top installs coil, and radial water cooling crystallographic orientation device and casting mold stir
Dynamic fine grain casting device.Casting mold room is located at the top of working chamber, and water-jacket typ is cooling, and water-jacket typ is cooling, and inner wall and fire door flange are
Stainless steel plate, outer wall is common carbon steel plate, inner wall and fire door flange by fine polishing, convenient for removing melting volatile matter.Casting mold
It is separated between room and working chamber with flap valve, casting mold room can individually vacuumize, and casting mold room sets graphite electrode heater.Melting coil
It is connected by the water-cooled cable into outside electric shaft and furnace for the body sidewall that breaks with melting intermediate frequency power supply.
Existing vacuum fine grain foundry furnace still has that production efficiency is low, and equipment dynamic stability is poor, and global reliability is not high
Problem.
Summary of the invention
The present invention is directed to provide a kind of high production efficiency in place of overcome the deficiencies in the prior art, equipment dynamic stability
Good, global reliability is strong, agitating type vacuum fine grain foundry furnace easy to maintain.
The present invention also provides a kind of application methods of above-mentioned agitating type vacuum fine grain foundry furnace.
In order to solve the above technical problems, the present invention is implemented as follows:
Agitating type vacuum fine grain foundry furnace, including upper furnace chamber, lower furnace chamber, upper furnace chamber vacuum system and lower furnace chamber vacuum system；Institute
Furnace chamber fixation is stated to be placed on lower furnace chamber；The lower furnace chamber cavity is communicated through isolating valve with upper furnace chamber cavity；The upper furnace chamber
The working port of vacuum system and lower furnace chamber vacuum system is communicated with the working port of upper furnace chamber and lower furnace chamber respectively；On described
Formwork heater and formwork temperature measuring equipment are equipped in furnace chamber；In the lower furnace chamber be equipped with melting coil, formwork stirring mechanism and
Formwork elevating mechanism；The formwork stirring mechanism is fixed at lower furnace chamber bottom center region；The formwork stirring mechanism includes
Formwork stirs driving unit and annular agitation pallet；The power output end of the formwork agitation driving unit drives annular agitation support
Disc spins；Formwork lifting disk is fixed at the top of the formwork elevating mechanism；The formwork lifting disk is equipped with formwork；It is described
The minimum diameter of annular agitation pallet is greater than the diameter of formwork lifting disk.
As a preferred embodiment, positive anti-switching transmission mechanism can be used in formwork agitation driving unit of the present invention.
Further, water-cooling structure can be used in isolating valve of the present invention.
Further, the tapered structure of looping pit of annular agitation pallet of the present invention.
The application method of above-mentioned agitating type vacuum fine grain foundry furnace, can implement as follows:
A, master alloy is placed in lower furnace chamber in the crucible of melting coil, formwork is placed in the annular agitation support of formwork stirring mechanism
On disk；
B, isolating valve is in close state, and is closed fire door, is synchronized to upper furnace chamber and lower furnace chamber and vacuumize operation；
C, after upper furnace chamber and lower furnace chamber reach specified vacuum degree, isolating valve is opened；
D, formwork is raised to the designated position in upper furnace chamber in formwork heater by formwork elevating mechanism；Formwork heater is powered, right
Formwork is heated；Control is carried out to temperature-rise period by formwork temperature measuring equipment to acquire with data；
E, after reaching predetermined temperature, start intermediate frequency power supply, be powered to melting coil；When master alloy fusing, reach specified
Temperature and when having casting condition, formwork is displaced downwardly to the annular agitation support of formwork stirring mechanism in lower furnace chamber by formwork elevating mechanism
On disk, isolating valve is closed at this time；
F, melting coil pours into master alloy melt in formwork, and positive and negative rotation direction agitation formwork carries out fine grain to formwork stirring mechanism repeatedly
Operation；
G, to fine grain operation complete, reach formwork come out of the stove condition when, lower furnace chamber vacuum system by itself valve cutting with lower furnace
The connection of room；
H, the formwork that casting manipulations are completed is taken out；Cleaning or replacement melting coil in crucible, the formwork more renewed, prepare into
The next heat cycle operation of row.
The present invention is a kind of continuous shape vacuum fine grain foundry furnace, agitation stability height, productive temp fast with agitation speed
The features such as fast.The present invention uses vertical layout, and occupied area is small；The form separated using stirring mechanism with elevating mechanism, with biography
System structure, which is compared, has the characteristics that stability is high, highly reliable, easy to maintain.
Compared with prior art, the present invention has following features.
1, present invention employs vertical double-chamber layout, equipment is continuous type, high production efficiency.
2, formwork heating is placed in upper chamber by the present invention, and melting coil and fine grain agitation casting associated mechanisms are placed in lower furnace chamber,
The center of gravity of whole equipment can be moved down as far as possible, the dynamic stability of equipment increases substantially.
3, the present invention uses the thinking of stirring mechanism and formwork elevating mechanism independent design, it is ensured that Liang Zhong mechanism is in work
It is not interfere with each other as state, improves equipment moving stability and global reliability.
Detailed description of the invention
The invention will be further described with specific embodiment with reference to the accompanying drawings of the specification.Protection scope of the present invention
It is not only limited to the statement of following content:
Fig. 1 is overall structure of the present invention.
In figure: 1, upper furnace chamber；2, lower furnace chamber；3, formwork heater；4, isolating valve；5, melting coil；6, formwork shaker machine
Structure；601, annular agitation pallet；7, formwork elevating mechanism；701, formwork lifting disk；8, upper furnace chamber vacuum system；9, lower furnace chamber is true
Empty set system；10, formwork temperature measuring equipment；11, formwork stirs driving unit；12, formwork elevation driving unit；13, formwork lifting is dynamic
Sealing；14, formwork.
Specific embodiment
As shown, agitating type vacuum fine grain foundry furnace, including upper furnace chamber 1, lower furnace chamber 2, upper furnace chamber vacuum system 8 and under
Furnace chamber vacuum system 9；The fixation of upper furnace chamber 1 is placed on lower furnace chamber 2；2 cavity of lower furnace chamber is through isolating valve 4 and upper furnace chamber
1 cavity communicates；The working port of the upper furnace chamber vacuum system 8 and lower furnace chamber vacuum system 9 respectively with upper furnace chamber 1 and lower furnace chamber
2 working port communicates；Formwork heater 3 and formwork temperature measuring equipment 10 are equipped in the upper furnace chamber 1；In the lower furnace chamber 2
It is interior to be equipped with melting coil 5, formwork stirring mechanism 6 and formwork elevating mechanism 7；The formwork stirring mechanism 6 is fixed at lower furnace chamber 2
Bottom center region；The formwork stirring mechanism 6 includes formwork agitation driving unit 11 and annular agitation pallet 601；The mould
The power output end that shell stirs driving unit 11 drives annular agitation pallet 601 to rotate；The top of the formwork elevating mechanism 7 is solid
Surely it is equipped with formwork lifting disk 701；The formwork lifting disk 701 is equipped with formwork 14；In the minimum of the annular agitation pallet 601
Diameter is greater than the diameter of formwork lifting disk 701.
Formwork agitation driving unit 11 of the present invention uses positive anti-switching transmission mechanism.Formwork stirring section moving cell 11
Output shaft can drive annular agitation pallet 601 to rotate by gear transmission mode.When actual design, annular agitation pallet 601
Bottom can be fixed with bearing block.Annular agitation pallet 601 can be realized on bearing block to be rotated freely.Isolating valve of the present invention
4 use water-cooling structure.The tapered structure of looping pit of annular agitation pallet 601 of the present invention.The bottom structure of formwork 14 with
The structure of annular agitation 601 looping pit of pallet is consistent.Annular agitation pallet 601 can be by taper looping pit to the bottom of formwork 14
Portion forms support.
Agitating type vacuum fine grain foundry furnace is a kind of for carrying out the spy of fine grain hot investment casting under vacuum or protective atmosphere
Kind metallurgical equipment, this equipment are used for the fine grain casting of equiax crystal, predominantly leaf disk-like accessory.Such equipment and such equipment
Expansion equipment can be used for carrying out producing the fine grain hot investment casting product of high temperature alloy under vacuum (or protective atmosphere).Agitating type vacuum
Fine grain foundry furnace uses vertical double-chamber structure, and above, melting and casting room is in lower section for formwork room.Formwork room is mainly used for accommodating mould
Shell heater carries out the heating work before fine grain casting for formwork；Melting and casting room carries out base material alloy for inductor secondary
Remelting and fine grain casting technique operation；After formwork is completed to heat, formwork is moved to by elevating mechanism on the stirring mechanism of lower room,
Master alloy remelting simultaneously, which finishes, has casting condition, starts to carry out casting and fine grain operation.Isolating valve is closed upper and lower room at this time
It separates and maintains vacuum respectively；Lower furnace chamber vacuum breaker takes out casting (and formwork) after the completion of fine grain stirs operation, be put into new formwork and
Master alloy enters the subsequent work period.
Formwork for being transferred quickly the formwork racking machine to lower furnace chamber by formwork elevating mechanism of the present invention from upper furnace chamber
On structure.The present invention is laid out using vertical double-chamber, and the stirring mechanism of formwork is placed in lower furnace body and farthest guarantees that moving center of gravity uses up
It possibly reduces to improve the dynamic stability of equipment.The present invention is laid out using vertical double-chamber, passes through isolating valve between two furnace chambers
It separates, formwork when upper furnace chamber heats, open by isolating valve, and formwork is moved in upper chamber formwork heater by jacking system；Mould
Formwork is moved on lower room formwork stirring mechanism by jacking system after the completion of shell heating, isolating valve is closed, not under the influence of room it is broken
The operations such as vacuum plus master alloy, mold changing shell.Thus it can realize that upper chamber is protected to the hot state of vacuum under continuous duty.Agitation
Method fine grain is realized by a set of transmission mechanism with quickly positive anti-switching, can be mentioned in melting crystallization process in formwork
It is rotated for quick positive anti-switching, is tying solid crystal grain for being crushed, realizing fine grain casting.
The present invention solves the vibration generated in agitation method fine grain casting process, this vibration using above-mentioned
For stabilization of equipment performance be it is fatal, significantly impact the stability and effect of casting process.Formwork shaker machine of the present invention
Structure and formwork elevating mechanism are the Liang Tao mechanism independently arranged, are not interfered in terms of mechanical structure, it is ensured that
The vibration that equipment generates during stirring fine grain is sealed to elevating mechanism and reliability effect very little.
As shown, the present invention includes upper furnace chamber 1, lower furnace chamber 2, formwork heater 3, isolating valve 4, melting coil 5, formwork
Stirring mechanism 6, formwork elevating mechanism 7, upper furnace chamber vacuum system 8, lower furnace chamber vacuum system 9, formwork temperature measuring equipment 10, formwork stir
Dynamic driving unit 11 and formwork elevation driving unit 12.Above structure unit together constitutes the main body of equipment.Wherein upper furnace chamber 1
It is welded structure with lower furnace chamber 2, collectively constitutes oven body part.Formwork heater 3, formwork temperature measuring equipment 10 are placed in furnace chamber 1
In, upper furnace chamber 1 is equipped with independent fire door with lower furnace chamber 2, for installation and casting manipulations.Isolating valve 4 is placed in lower furnace chamber 2,
For realizing the sealing between upper furnace chamber 1 and lower furnace chamber 2, isolating valve 4 uses water-cooling structure, prevents for a long time in hot state valve plate
It is deformed.Melting coil 5, formwork stirring mechanism 6, formwork elevating mechanism 7 are placed in lower furnace chamber 2, wherein formwork elevator
The formwork lifting disk of structure 7 is passed through from the annular agitation pallet in formwork stirring mechanism 6, when formwork 14 is placed in formwork elevating mechanism
When 7, with formwork lifting disk synchronizing moving.When formwork lifting disk is reduced to annular agitation pallet or less, formwork 14 is detached from mould
Shell elevating mechanism 7 is placed on formwork stirring mechanism 6.Melting coil 5 is placed in lower furnace chamber 2, can be by the master alloy of secondary remelting
Being poured into will be in the formwork 14 on formwork stirring mechanism 6.
Above equipment application method is as follows:
1, prepare alloy and formwork used, and routine inspection is carried out to equipment, functions feedback is normal, after alarm without exception
Starting device；
2, in master alloy being placed in the crucible of melting coil 5, formwork 14 is placed in the taper fixed frame of formwork stirring mechanism 6
On；
3, isolating valve 4 is in closing shape and reaches, and closes fire door, synchronizes to upper furnace chamber 1 and lower furnace chamber 2 and carry out vacuumizing operation；
4, after upper furnace chamber 1 reaches specified vacuum degree with lower furnace chamber 2, isolating valve 4 is opened, and upper and lower furnace chamber 1 is connected to lower furnace chamber 2；
5, formwork elevating mechanism 7 works, and formwork 14 is raised to the designated position in the formwork heater 3 of upper furnace chamber 2, then formwork
Heater 3 is powered, and carries out formwork heating operation by set heating curve, is controlled by formwork temperature measuring equipment 10 to temperature-rise period
System is acquired with data；
6, after reaching predetermined temperature and keeping the temperature a period of time by technique, start intermediate frequency power supply, melting coil 5 is carried out high-power
It is powered, master alloy melts at this time, and reaches assigned temperature and have casting condition, while formwork elevating mechanism 7 is quick by formwork 14
It is displaced downwardly on the formwork stirring mechanism 6 in lower furnace chamber 2, in state to be cast, isolating valve 4 should be closed at this time, again by upper furnace
Room 1 is separated with lower furnace chamber 2；
7, melting coil 5 is poured into master alloy melt in formwork 14 by set casting curve, by given design scheme, is stood several
After minute, positive and negative rotation direction agitation formwork 14 carries out fine grain operation to formwork stirring mechanism 6 repeatedly；
8, to fine grain make complete latter time, and have formwork 14 come out of the stove condition when, lower furnace chamber vacuum system 9 pass through itself valve
Door cutting is contacted with lower furnace chamber 2, lower 2 vacuum breaker of furnace chamber；
9, the formwork 14 that casting manipulations are completed is taken out, is cleared up or is replaced the crucible in melting coil 5 by technique requirement, more renew
Formwork 14 be ready for the cycle operation of next heat；
11, repeatedly above 2~9 steps, it can be achieved that continous way production technology.
In the present invention unless specifically defined or limited otherwise, the terms such as term " setting ", " connection ", " fixation " are answered
It is interpreted broadly, for example, it may be being fixedly connected, may be a detachable connection, or is integral；It can be mechanical connection,
It can be electrical connection；It can be directly connected, the company inside two elements can also be can be indirectly connected through an intermediary
Logical or two elements interaction relationship unless otherwise restricted clearly for the ordinary skill in the art, can
To understand the concrete meaning of above-mentioned term in the present invention as the case may be.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. agitating type vacuum fine grain foundry furnace, which is characterized in that including upper furnace chamber (1), lower furnace chamber (2), upper furnace chamber vacuum system
(8) and lower furnace chamber vacuum system (9)；Upper furnace chamber (1) fixation is placed on lower furnace chamber (2)；Lower furnace chamber (2) the cavity warp
Isolating valve (4) is communicated with upper furnace chamber (1) cavity；The working end of the upper furnace chamber vacuum system (8) and lower furnace chamber vacuum system (9)
Mouth is communicated with the working port of upper furnace chamber (1) and lower furnace chamber (2) respectively；Formwork heater (3) are equipped in the upper furnace chamber (1)
And formwork temperature measuring equipment (10)；Melting coil (5), formwork stirring mechanism (6) and formwork lifting are equipped in the lower furnace chamber (2)
Mechanism (7)；The formwork stirring mechanism (6) is fixed at lower furnace chamber (2) bottom center region；The formwork stirring mechanism (6)
Including formwork agitation driving unit (11) and annular agitation pallet (601)；The power of formwork agitation driving unit (11) is defeated
Outlet drives annular agitation pallet (601) rotation；Formwork lifting disk is fixed at the top of the formwork elevating mechanism (7)
(701)；The formwork lifting disk (701) is equipped with formwork (14)；The minimum diameter of annular agitation pallet (601) is greater than mould
The diameter of shell lifting disk (701).
2. agitating type vacuum fine grain foundry furnace according to claim 1, it is characterised in that: the formwork stirs driving unit
(11) positive anti-switching transmission mechanism is used.
3. agitating type vacuum fine grain foundry furnace according to claim 2, it is characterised in that: the isolating valve (4) uses water
Air-cooled structure.
4. agitating type vacuum fine grain foundry furnace according to claim 3, it is characterised in that: the annular agitation pallet
(601) the tapered structure of looping pit.
5. a kind of application method of the agitating type vacuum fine grain foundry furnace as described in Claims 1 to 4, which is characterized in that by as follows
Step is implemented:
A, master alloy is placed in lower furnace chamber (2) in the crucible of melting coil (5), formwork (14) is placed in formwork stirring mechanism
(6) in annular agitation pallet (601)；
B, isolating valve (4) is in close state, and is closed fire door, is synchronized to upper furnace chamber (1) and lower furnace chamber (2) and vacuumize work
Industry；
C, after upper furnace chamber (1) and lower furnace chamber (2) reach specified vacuum degree, isolating valve (4) are opened；
D, formwork (14) is raised to the designated position in upper furnace chamber (2) in formwork heater (3) by formwork elevating mechanism (7)；Formwork
Heater (3) is powered, and heats to formwork；Control is carried out to temperature-rise period by formwork temperature measuring equipment (10) to adopt with data
Collection；
E, after reaching predetermined temperature, start intermediate frequency power supply, be powered to melting coil (5)；When master alloy fusing, reach finger
When determining temperature and having casting condition, formwork (14) is displaced downwardly to formwork stirring mechanism in lower furnace chamber (2) by formwork elevating mechanism (7)
(6) in annular agitation pallet (601), isolating valve (4) is closed at this time；
F, melting coil (5) pours into master alloy melt in formwork (14), and positive and negative rotation direction stirs mould to formwork stirring mechanism (6) repeatedly
Shell (14) carries out fine grain operation；
G, to fine grain operation complete, reach formwork (14) come out of the stove condition when, lower furnace chamber vacuum system (9) is cut off by itself valve
With the connection of lower furnace chamber (2)；
H, the formwork (14) that casting manipulations are completed is taken out；Crucible in cleaning or replacement melting coil (5), the formwork more renewed
(14), it is ready for next heat cycle operation.
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| CN201910210853.0A CN109719278A (en) | 2019-03-20 | 2019-03-20 | Agitating type vacuum fine grain foundry furnace and its application method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894266A (en) * | 2021-09-16 | 2022-01-07 | 沈阳铸造研究所有限公司 | Multi-chamber semi-continuous vacuum casting furnace |
| CN114309550A (en) * | 2021-12-31 | 2022-04-12 | 江苏永瀚特种合金技术股份有限公司 | Device and method for casting integral fine grains based on local area temperature adjustable system |
| CN114619021A (en) * | 2020-12-11 | 2022-06-14 | 中国科学院金属研究所 | Method for casting integral equiaxial fine-grained blade disc by mechanical oscillation method |
| CN114734024A (en) * | 2022-03-31 | 2022-07-12 | 上海元定科技有限公司 | Liquid metal cooling vacuum precision casting furnace and working method |
| CN115007803A (en) * | 2022-07-12 | 2022-09-06 | 上海交通大学 | Temperature control system and method for die shell for high-temperature alloy pressure-regulating precision casting |
| CN117020157A (en) * | 2023-07-26 | 2023-11-10 | 潍坊博源动力科技有限公司 | Vibration pressurizing fine-grain casting equipment and manufacturing process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114619021A (en) * | 2020-12-11 | 2022-06-14 | 中国科学院金属研究所 | Method for casting integral equiaxial fine-grained blade disc by mechanical oscillation method |
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| CN113894266A (en) * | 2021-09-16 | 2022-01-07 | 沈阳铸造研究所有限公司 | Multi-chamber semi-continuous vacuum casting furnace |
| CN113894266B (en) * | 2021-09-16 | 2024-01-19 | 沈阳铸造研究所有限公司 | Multichamber semicontinuous vacuum casting furnace |
| CN114309550A (en) * | 2021-12-31 | 2022-04-12 | 江苏永瀚特种合金技术股份有限公司 | Device and method for casting integral fine grains based on local area temperature adjustable system |
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