CN218873688U - Vacuum precision casting furnace with casting heater - Google Patents
Vacuum precision casting furnace with casting heater Download PDFInfo
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- CN218873688U CN218873688U CN202223113615.4U CN202223113615U CN218873688U CN 218873688 U CN218873688 U CN 218873688U CN 202223113615 U CN202223113615 U CN 202223113615U CN 218873688 U CN218873688 U CN 218873688U
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Abstract
The utility model belongs to the technical field of vacuum casting, especially, relate to a take vacuum precision casting stove of casting mould heater. The horizontal layout structure is adopted, the continuous design is adopted, and the efficient production capacity is realized. Comprises a casting furnace body; the furnace is characterized in that the furnace body adopts a horizontal layout and comprises a smelting chamber and a casting chamber; the melting chamber and the casting chamber are separated by an isolation valve, and both the melting chamber and the casting chamber are provided with vacuum systems for vacuumizing; and a smelting coil is arranged in the smelting chamber, and a smelting heater is arranged above the smelting chamber.
Description
Technical Field
The utility model belongs to the technical field of vacuum casting, especially, relate to a take vacuum precision casting stove of casting mould heater.
Background
The vacuum precision casting furnace is a special metallurgical equipment for precision casting under vacuum or protective atmosphere, and is mainly used for producing thin-wall castings, fine-grained castings and other special process high-temperature alloy precision castings. The traditional vacuum precision casting furnace adopts a vertical double-chamber structure, a casting mold chamber is arranged below, and a smelting chamber is arranged above. The smelting chamber is used for the inductor to carry out secondary remelting on the base metal alloy, and a casting heating system is also needed in the smelting chamber. And pouring the molten metal in the crucible into the casting mold after the secondary remelting is finished, and moving the casting mold downwards at a certain speed according to different processes. Until the smelting chamber is completely moved out, the two chambers are sealed and separated by the water-cooled isolating valve. The mould chamber is emptied and a new mould is loaded. The melting chamber is also fed with new alloy for the next working cycle by the feeding mechanism.
The traditional vacuum precision casting furnace is not provided with a casting mold heater according to the process requirements, but when producing thin-wall castings, fine-grain castings and other castings with special process requirements, the temperature of the casting mold (shell) can not meet the process requirements. This may result in coarse grains on the surface of the casting, under-casting, and other process defects. Therefore, when producing thin-wall castings, fine-grain castings and other castings with special process requirements, a casting mold heater is arranged in the vacuum furnace to ensure that the temperature of the casting mold (casting mold) meets the process requirements. The traditional vacuum precision casting furnace is also provided with a built-in casting heater, but the traditional vacuum precision casting furnace is arranged below the side of the smelting coil, and the casting mold completely treats the inside of the heater during casting. The conventional layout has the following drawbacks.
1. The great sight shielding is generated during pouring, and the pouring operation is not facilitated.
2. The isometric crystal pouring speed is generally high, the situation that molten liquid splashes during pouring is easy to produce, the mould heater is seriously damaged by the splashes, and the maintenance workload of the mould heater is increased.
3. In the isometric crystal pouring process, the lifting height of the casting mold is often required to be adjusted according to different casting molds, but when the casting mold heater is used, the adjustment is realized just after the heater is fixed, so that the pouring effect is not ideal.
Disclosure of Invention
The utility model provides a vacuum precision casting furnace with a casting mold heater aiming at the defects existing in the prior art.
In order to realize the purpose, the utility model adopts the following technical proposal, comprising a casting furnace body; the furnace body adopts a horizontal layout and comprises a smelting chamber and a casting chamber; the melting chamber and the casting chamber are separated by an isolation valve, and both the melting chamber and the casting chamber are provided with vacuum systems for vacuumizing; and a smelting coil is arranged in the smelting chamber, and a smelting heater is arranged above the smelting chamber.
Further, the vacuum system connected with the smelting chamber is a low vacuum system, and the vacuum system connected with the casting chamber is a high vacuum system.
Furthermore, the smelting coil is connected with an induction smelting turnover mechanism, the induction smelting turnover mechanism comprises a rotating disk mechanism, namely a rotary supporting disk, the smelting coil is fixed on the flat inner ring of the rotary support, and the rotary supporting disk is driven by a driving mechanism to drive the inner ring of the rotary supporting disk to rotate so as to turn over the smelting coil.
Furthermore, the turnover mechanism is arranged on a translation mechanism, the translation mechanism comprises an installation plate fixed in the inner cavity of the smelting chamber, two parallel guide rails are arranged on the installation plate, the two guide rails are connected with a translation plate through slide blocks, the slide blocks are connected on the guide rails in a sliding manner, and the slide blocks are fixedly connected with the translation plate; the mounting plate is also provided with a linear driving mechanism, and the linear driving mechanism is connected with the sliding block and drives the translation plate on the sliding block to move back and forth along the guide rail.
Further, the smelting chamber is provided with a casting mold lifting mechanism which is positioned below the casting mold heater; the casting mold lifting mechanism comprises a screw rod lifter, the screw rod lifter is used for lifting a casting mold tray, the casting mold is placed on the casting mold tray, and the casting mold moves up and down in the smelting chamber along with the casting mold tray.
Furthermore, a casting mold is arranged outside the casting mold chamber and comprises a casting mold chamber door, an outer translation vehicle, an inner translation vehicle and an inner translation driving mechanism, and a casting mold tray is placed on the inner translation vehicle; the casting mold chamber door is arranged on one side of the outer translation trolley, and when the outer translation trolley moves towards the casting chamber, the casting mold chamber door is tightly attached to the casting mold chamber flange, so that the closing action of the casting mold chamber is completed; a platform is arranged on one side of the casting mould chamber door, which is far away from the outer translation vehicle, and an inner translation vehicle is arranged on the platform; the inner translation trolley is connected with the inner translation driving mechanism, the inner translation driving mechanism is positioned on the outer translation trolley, the movable part of the inner translation driving mechanism penetrates through the casting chamber door and then is connected with the inner translation trolley, and the inner translation driving mechanism pushes the inner translation trolley and the casting tray to enter the specified position of the smelting chamber.
Furthermore, a feeding bin and a temperature measuring mechanism are arranged above the smelting chamber.
Compared with the prior art the utility model discloses beneficial effect.
1. And a horizontal layout structure and a continuous design are adopted, so that the production capacity is high-efficiency.
2. The water-cooling isolating valve is adopted to separate the smelting chamber from the casting chamber, and the feeding bin and the temperature measuring mechanism are matched, so that the smelting chamber is kept at vacuum heat in a plurality of production periods, and the equipment has a continuous production function.
3. The method is particularly suitable for isometric crystal casting processes needing matching with heaters in furnaces, such as thin-wall castings, fine-grain castings and other casting products with special process requirements.
4. The large-size casting mold has the functions of a large-size casting mold heater and a smelting coil in translation, and is suitable for the precise casting process of a large-size casting mold.
Drawings
The present invention will be further described with reference to the accompanying drawings and the following detailed description. The scope of protection of the present invention is not limited to the following description.
FIG. 1 is a schematic view showing the overall structure of a vacuum precision casting furnace with a mold heater.
Fig. 2 is a structural schematic diagram of the melting coil overturning mechanism.
Fig. 3 is a schematic structural diagram of a melting coil translation mechanism.
FIG. 4 is a schematic structural view of a mold lifting mechanism.
Fig. 5 is a schematic structural view of a casting vehicle.
In the figure, 1 is a smelting chamber; 2 is a casting mold chamber; 3 is a feeding mechanism; 4, a temperature measuring mechanism; 5 is a smelting coil; 6 is a casting mould heater; 7 is a casting mould lifting mechanism; 8 is an isolation valve; 9 is a casting vehicle; 10 is a casting mould translation mechanism; 11 is a casting mould; 12 is a high vacuum system; 13 is a low vacuum system; 14 is a mould heater baffle; 15 is temperature thermocouple; 16 is a casting mould tray;
17 is a rotating disk driving mechanism, 18 is a rotating disk mechanism (namely a rotary supporting disk), 19 is a water-cooling coaxial electrode, and 20 is a totally enclosed smelting coil;
21 is a servo reducer I, 22 is a guide rail, 23 is an installation plate, and 24 is a translation plate;
25 is a casting mould tray, 26 is a dynamic seal guide lubricating device, 27 is a lifting shaft, 28 is a ball screw, and 29 is a servo speed reducer II;
Detailed Description
The utility model is developed aiming at the defect that the traditional vacuum precision casting furnace is exposed when producing thin-wall castings, fine-grain castings and other castings with special technological requirements.
As shown in fig. 1-5, in particular, it adopts a horizontal double-chamber layout, the melting chamber and the casting chamber are separated by an isolation valve, both chambers are provided with vacuum systems, and can be independently evacuated; the smelting coil has a translation function; the casting mould heater is arranged at a fixed position above the smelting chamber.
Preferably, the horizontal double-chamber continuous structure ensures that main working units such as a casting mold heater, a smelting coil and the like in the smelting chamber are kept in a vacuum thermal state, so that the equipment has the capacity of continuous operation.
Preferably, the two furnace chambers are separated by an isolation valve, so that the smelting chamber can be kept in a vacuum hot state in a continuous working state.
Preferably, a translatable melting coil is employed. When smelting, the coil is in the smelting position, and the operations of temperature measurement, material feeding and the like can be carried out. During pouring, the smelting thin line is translated to a pouring position and can perform translation motion by matching with a pouring curve.
Preferably, a fixed mold heater is adopted, when the mold moves to a specified position of the smelting chamber, the mold lifting mechanism transfers the shell to the mold heater for heat preservation and heating process operation, and when the heating process is completed, the mold lifting mechanism lowers the mold to a pre-position for pouring operation.
As shown in fig. 1, a melting chamber 1, a casting chamber 2, a charging mechanism 3, a temperature measuring mechanism 4, a melting coil 5, a casting heater 6, a casting lifting mechanism 7, a water-cooled isolating valve 8, a casting mold 9, a casting translation mechanism 10, a casting mold 11, a high vacuum system 12, a low vacuum system 13 and the like form a main body of the equipment, and a vacuum furnace structure with a horizontal layout is formed.
Wherein, the smelting chamber 1 and the casting chamber 2 are in a welding structure and form a furnace body part together.
The smelting coil 5, the casting mould heater 6 and the water-cooling isolating valve 8 are arranged in the smelting chamber 1, and the smelting chamber 1 and the casting mould chamber 2 are respectively provided with an independent furnace door for installation and casting operation. The water-cooling isolating valve 8 is arranged in the smelting chamber 1 and used for realizing sealing between the smelting chamber 1 and the casting chamber 2, and the water-cooling isolating valve 8 adopts a water-cooling structure to prevent the valve plate from deforming in a hot state for a long time. The smelting coil 5 has both the turning casting function and the translation function, and can ensure a stable casting curve. The mold heater 6 adopts an induction heating method. And a casting mold heater baffle 14 is arranged at the communication position of the casting mold heater and the smelting chamber, the connection modes are various, and the baffle can be hinged to the top of the smelting chamber or inserted.
The casting mould 9 is arranged outside the casting mould chamber 2 and mainly has two functions, namely, the casting mould 9 is used as a furnace door function of the casting mould chamber 2 to ensure that the casting mould 11 enters the chamber casting mould chamber 2, and the casting mould 11 is stably conveyed to a specified position in the smelting chamber 1, namely right below the casting mould heater 6, and is lifted into the casting mould heater 6 by the casting mould lifting mechanism 7 together with the casting mould tray 16 as a carrier of the casting mould translation mechanism 10. The temperature measuring mechanism 4 is positioned on the smelting chamber 2, the smelting coil 5 is positioned right above the translation initial position, and the temperature measuring thermocouple 15 is immersed into the mother alloy melt being smelted through the self mechanism to carry out smelting temperature measuring operation.
The equipment operation flow outline:
1. preparing the alloy and the casting mold, performing routine inspection on the equipment, feeding back the functions of all parts to be normal, and starting the equipment after alarming without abnormality;
2. the master alloy is placed in a crucible of the melting coil 5, and the mold 11 is placed on a mold tray 16.
3. The water-cooling isolating valve 8 is in a closed state, the furnace door is closed, and the smelting chamber 1 and the casting chamber 2 are evacuated from low to high vacuum degrees respectively through a high vacuum system 12 and a low vacuum system 13.
4. After the vacuum degree of the melting chamber 1 reaches a specified value, the mold heater 6 is powered on, and the heating operation is carried out according to a preset program.
5. After the smelting chamber 1 and the casting chamber 2 reach the specified vacuum degree, the water-cooling isolation valve 8 is opened, and the smelting chamber 1 is communicated with the casting chamber 2.
6. The mold translation mechanism 10 drives the mold tray 16 to move the mold 11 to a predetermined position in the melting chamber 1, which is directly above the mold lifting mechanism 7.
7. The mold lifting mechanism 7 works to lift the mold 11 and separate the mold translation mechanism 10. The mould heater baffle 14 is opened, and the mould 11 is quickly lifted to a specified position in the mould heater 6 by the power provided by the mould lifting mechanism 7, so that the mould 11 is heated.
8. When the casting mould 11 reaches the preset temperature and is kept warm for a period of time according to the process, the intermediate frequency power supply is started, the high-power electrification is carried out on the smelting coil 5, and at the moment, the master alloy is melted. At this time, the temperature measuring thermocouple 15 can be immersed in the mother alloy melt by the temperature measuring mechanism 4 to measure the temperature. When the mother alloy melt reaches a specified temperature and has pouring conditions, the temperature measuring mechanism 4 must draw the temperature measuring thermocouple 15 back into the mechanism.
9. After the smelting coil 5 finishes the preset remelting process, the casting mold lifting mechanism 7 quickly lowers the casting mold 11 to a preset pouring position, the baffle 14 of the casting mold heater is closed, and the casting mold heater 6 keeps the heat preservation state continuously.
10. The smelting coil 5 is translated according to a set program to a specified pouring position, and a master alloy melt is poured into the casting mold 11 according to a set pouring curve.
11. After the casting is finished and the casting is kept still for a plurality of minutes according to the established process, the casting mold translation mechanism 10 works, the hydraulic cylinder 14 drives the casting mold tray 16 to move the casting mold 11 to the specified position of the casting mold chamber 2, and the water-cooling isolation valve 8 is closed to isolate the smelting chamber 1 from the casting mold chamber 2.
12. And (3) standing according to the process requirement (if the requirement exists), after the casting mold is cooled to a certain temperature, closing the vacuum valve by the low vacuum system 13, performing the vacuum breaking operation on the casting mold chamber 2, moving the casting mold 9 outwards, and completely separating the casting mold 11 from the casting mold chamber 2.
13. The mold 11 is taken out and new master alloy is charged into the melting coil 5 by the charging mechanism 3 without breaking vacuum.
14. The continuous production process can be realized by repeating the steps 2 to 13.
Example 1, the melting coil was composed of a red copper coil, a stainless steel support, an insulating material, and the like. The induction smelting turnover mechanism comprises a totally enclosed smelting coil 20, a water-cooling coaxial electrode 19, a rotating disk driving mechanism 17, a rotating disk mechanism 18 and an inductor supporting frame; wherein, the surfaces of the totally enclosed smelting coil 20, the water-cooling coaxial electrode 19, the conductive pipeline, the coupling joint and the flange are subjected to insulation treatment by adopting a spraying process, so that the discharge breakdown phenomenon in a vacuum high-temperature environment is avoided, the operation reliability of the equipment is improved, and the long-term maintenance-free use is ensured. The water-cooling coaxial electrode 19 is connected with the totally enclosed smelting coil 20, and the water-cooling coaxial electrode 19 is fixed on the rotating disc mechanism 18 and is driven to turn over by the rotating disc mechanism 18. The connection of the rotary disk drive mechanism 17 to the rotary disk, etc. refers to the rotary support disk and its drive mechanism, and is not described herein for the prior art.
In example 3, the mold lifting mechanism includes a mold tray, a lifting shaft 27, a rolling seal guide lubricating device 26, a ball screw 28 transmission pair, a servo reduction motor, and the like. The lifting speed of the casting mould can be adjusted, and the process requirements are met. The lifting rod is introduced into the vacuum chamber from the bottom of the vacuum chamber; the casting mould tray is arranged at the top end of the lifting rod; the casting mould is arranged on a casting mould tray, the casting mould tray is arranged on the casting mould together with the casting mould when the casting mould is loaded, and the casting mould moves up and down in the casting mould tray together with the casting mould.
In example 4, a mold is placed outside the mold chamber, and when the mold is placed on the mold pallet during operation, the inner translation mechanism is controlled by the inner translation driving mechanism 33 to process the retracted state. When the outer translation vehicle 31 moves towards the furnace body direction, the casting chamber door 30 is tightly attached to the casting chamber flange, and the closing of the casting chamber is completed. Then the inner translation driving mechanism 33 pushes the inner translation vehicle 32 and the mould tray to enter the designated position of the smelting chamber, and the mould lifting mechanism lifts the mould tray to be separated from the inner translation vehicle 32.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as satisfy the operation needs, all be in the protection scope of the utility model.
Claims (4)
1. The vacuum precision casting furnace with the casting heater comprises a casting furnace body; the method is characterized in that: the furnace body adopts a horizontal layout and comprises a smelting chamber and a casting chamber;
the melting chamber and the casting chamber are separated by an isolation valve, and both the melting chamber and the casting chamber are provided with vacuum systems for vacuumizing;
a smelting coil is arranged in the casting chamber, and a casting heater is arranged above the smelting chamber;
the smelting coil is connected with an induction smelting turnover mechanism, the induction smelting turnover mechanism comprises a rotating disk mechanism, namely a rotary supporting disk, the smelting coil is fixed on the flat inner ring of the rotary support, and the rotary supporting disk is driven by a driving mechanism to drive the inner ring of the rotary supporting disk to rotate so as to turn the smelting coil;
the turnover mechanism is arranged on a translation mechanism, the translation mechanism comprises an installation plate fixed in the inner cavity of the smelting chamber, two parallel guide rails are arranged on the installation plate, the two guide rails are connected with a translation plate through a sliding block, the sliding block is connected on the guide rails in a sliding manner, and the sliding block is fixedly connected with the translation plate; the mounting plate is also provided with a linear driving mechanism, and the linear driving mechanism is connected with the sliding block and drives the translation plate on the sliding block to move back and forth along the guide rail;
the smelting chamber is provided with a casting mold lifting mechanism which is positioned below the casting mold heater; the casting mold lifting mechanism comprises a screw rod lifter, the screw rod lifter is used for lifting a casting mold tray, the casting mold is placed on the casting mold tray, and the casting mold moves up and down in the smelting chamber along with the casting mold tray.
2. The vacuum precision casting furnace with a casting heater according to claim 1, characterized in that: the vacuum system connected with the smelting chamber is a low vacuum system, and the vacuum system connected with the casting chamber is a high vacuum system.
3. The vacuum precision casting furnace with a mold heater according to claim 1, wherein: the casting mold is arranged outside the casting mold chamber and comprises a casting mold chamber door, an outer translation trolley, an inner translation trolley and an inner translation driving mechanism, and a casting mold tray is placed on the inner translation trolley; the casting mold chamber door is arranged on one side of the outer translation trolley, and when the outer translation trolley moves towards the casting chamber, the casting mold chamber door is tightly attached to the casting mold chamber flange, so that the closing action of the casting mold chamber is completed; a platform is arranged on one side of the casting mould chamber door, which is far away from the outer translation vehicle, and an inner translation vehicle is arranged on the platform; the inner translation vehicle is connected with the inner translation driving mechanism, the inner translation driving mechanism is positioned on the outer translation vehicle, the movable part of the inner translation driving mechanism penetrates through the casting chamber door and then is connected with the inner translation vehicle, and the inner translation driving mechanism pushes the inner translation vehicle and the casting tray to enter the specified position of the melting chamber.
4. The vacuum precision casting furnace with a casting heater according to claim 1, characterized in that: and a feeding bin and a temperature measuring mechanism are arranged above the smelting chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223113615.4U CN218873688U (en) | 2022-11-22 | 2022-11-22 | Vacuum precision casting furnace with casting heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223113615.4U CN218873688U (en) | 2022-11-22 | 2022-11-22 | Vacuum precision casting furnace with casting heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218873688U true CN218873688U (en) | 2023-04-18 |
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ID=85949080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223113615.4U Active CN218873688U (en) | 2022-11-22 | 2022-11-22 | Vacuum precision casting furnace with casting heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218873688U (en) |
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2022
- 2022-11-22 CN CN202223113615.4U patent/CN218873688U/en active Active
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