CN218050271U - Vacuum casting furnace - Google Patents
Vacuum casting furnace Download PDFInfo
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- CN218050271U CN218050271U CN202222540267.2U CN202222540267U CN218050271U CN 218050271 U CN218050271 U CN 218050271U CN 202222540267 U CN202222540267 U CN 202222540267U CN 218050271 U CN218050271 U CN 218050271U
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Abstract
A vacuum casting furnace is used for vacuum casting and comprises a smelting chamber, a casting chamber, a heat-preserving bag, a shell and a drawing mechanism; the upper top end of the smelting chamber is provided with a feed port, a first flap valve is arranged at the position of the feed port, the crucible is arranged in the smelting chamber, the heat-preservation bag is arranged at the lower bottom of the smelting chamber, and a through hole communicated with the casting mold chamber is formed in the side wall of the smelting chamber below the heat-preservation bag; the casting mold chamber is arranged below the smelting chamber and communicated with the smelting chamber, a second flap valve is arranged at the upper top end of the casting mold chamber, a through hole for a drawing mechanism to pass through is formed in the lower bottom end of the casting mold chamber, the drawing mechanism is arranged below the casting mold chamber, the shell is arranged at the upper top end of the drawing mechanism, the drawing mechanism passes through the through hole in the lower bottom end of the casting mold chamber, the shell is driven to ascend to enter the heat preservation bag, and the drawing mechanism descends to drive the shell to enter the casting mold chamber. The utility model discloses an above-mentioned design realizes reducing the shell and transporting the temperature loss in the smelting chamber, improves foundry goods casting quality.
Description
Technical Field
The utility model belongs to the technical field of metal material thermal treatment, concretely relates to vacuum melting and casting furnace.
Background
Most high-temperature alloy precision castings are in extreme environments of high temperature, high pressure, high load, high vibration and high corrosion for a long time, and have extremely high requirements on metallurgical quality, dimensional precision and grain size.
In the technical method for casting fine alloy grains, firstly, a shell is preheated outside a casting furnace and then is sent into a smelting chamber of the casting furnace, liquid metal smelted by the smelting chamber flows into the shell to finish the casting process, but temperature loss can occur in the process that the shell is preheated and then is sent into the smelting chamber of the casting furnace, and the difference between the casting temperature and the shell preheating temperature is larger by adopting the traditional thermal control method, so that the internal temperature and the external temperature of molten metal are uneven, the viscosity of alloy liquid is high, the fluidity is low, the solidification time is shortened, bubbles and inclusions cannot float upwards in time, the purity of a casting is reduced, and an undercasting defect is easy to generate on a thin-wall casting.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a vacuum casting furnace can avoid the loss of temperature on shell surface, reduces casting temperature and shell temperature difference, improves foundry goods casting quality, and concrete scheme is as follows.
A vacuum casting furnace comprises a smelting chamber, a casting chamber, a heat preservation bag, a shell and a drawing mechanism;
the upper top end of the smelting chamber is provided with a feed port, a first flap valve is arranged at the position of the feed port, a crucible is arranged in the smelting chamber and is positioned below the feed port, a heat-insulating bag is arranged at the lower bottom of the smelting chamber, and the bottom wall of the smelting chamber positioned below the heat-insulating bag is provided with a through hole communicated with the casting chamber;
the heat insulation bag comprises a pouring gate device, a cover plate, a heating heat insulation barrel and a water cooling ring, wherein the cover plate is arranged at the upper end of the heating heat insulation barrel;
the casting mold chamber is arranged below the smelting chamber and is communicated with the smelting chamber, a second flap valve is arranged at the position where the upper top end of the casting mold chamber is communicated with the smelting chamber, a through hole for a drawing mechanism to pass through is formed in the lower bottom end of the casting mold chamber, and the drawing mechanism is arranged below the casting mold chamber;
the shell is arranged at the upper top end of the drawing mechanism, the drawing mechanism penetrates through the through hole at the lower bottom end of the casting chamber, the shell is driven to enter the heat preservation bag by rising, and the shell is driven to enter the casting chamber by falling of the drawing mechanism.
As a supplement to the technical scheme, the drawing mechanism comprises a lifting rod, a fixed base, a sliding base, a motor, a screw rod and a sliding rail; the fixed base is arranged below the casting mold chamber, a vertically arranged slide rail is arranged on the fixed base, the sliding base is arranged on the slide rail and can vertically slide along the slide rail, and a vertical threaded hole is formed in the sliding base; the motor is fixedly arranged on the fixed base, the screw rod is in threaded connection with the threaded hole in the sliding base, one end of the screw rod is connected with a rotating shaft of the motor, and the other end of the screw rod is connected with the fixed base through a bearing; the lower end of the lifting rod is fixedly connected with the sliding base.
As a supplement of the technical scheme, the heating and heat-insulating cylinder body of the heat-insulating bag comprises a graphite cylinder and an electromagnetic induction coil, wherein the graphite cylinder is of a hollow cylinder body structure with an upper opening and a lower opening, and the electromagnetic induction coil is sleeved outside the graphite cylinder.
The smelting furnace is characterized by further comprising a diffusion pump and a first mechanical pump group, wherein the diffusion pump is communicated with the smelting chamber through a pipeline, and the first mechanical pump group is connected with the diffusion pump.
The temperature measuring and feeding mechanism comprises a feeding tower, a temperature measuring tower, a corner cylinder and a rotating base;
the corner cylinder is vertically arranged at the upper end of the casting chamber and located on one side of a feeding port of the casting chamber, the rotating base is arranged on a piston rod of the corner cylinder, the feeding tower and the temperature measuring tower are of vertically arranged columnar structures, one end of the rotating base in the length direction is connected with the side surface of the feeding tower, and the other end of the rotating base in the length direction is connected with the side surface of the temperature measuring tower.
As a supplement of the technical scheme, the device also comprises a second mechanical pump set which is respectively communicated with a feed inlet of the smelting chamber, the smelting chamber and the casting mold chamber through pipelines.
Has the advantages that: the utility model discloses a vacuum fusion casting furnace through setting up the heat preservation stove in the smelting chamber, moves into whole casting process and accomplishes in the heat preservation stove, can preheat the die shell in the heat preservation stove and heat up simultaneously before the casting, compensaties its temperature loss that transports the in-process in the heat preservation stove after externally preheating, solves the technical problem that casting temperature and die shell exist the difference in temperature, avoids the foundry goods to produce the technical problem of oweing the casting defect, promotes foundry goods casting quality. In addition, through the mechanism design of the drawing mechanism, the stability of the shell drawing process can be ensured, the vibration of the shell in the lifting process is reduced, and the stable growth of crystal grains is facilitated. The lifting speed of the casting mould can be adjusted by the rotating speed of the motor, the speed change in the orientation process is in stable transition, and proper buffering is provided for the beginning and the end of the movement.
Drawings
Fig. 1 is a schematic view of the three-dimensional structure of the present invention.
Fig. 2 is the schematic diagram of the structure of the thermal insulation bag of the utility model.
Fig. 3 is a schematic view of the structure of the thermal insulation bag of the present invention.
Fig. 4 is a schematic structural view of the gate device of the present invention.
Fig. 5 is a schematic view of the drawing mechanism of the present invention.
Fig. 6 is a schematic structural view of the feeding tower and the temperature measuring tower of the present invention.
In the figure: 1. the device comprises a smelting chamber, 2, a feeding port, 3, a casting chamber, 4, a heat-insulating bag, 5, a gate device, 6, a cover plate, 7, a water-cooling ring, 8, a graphite barrel, 9, an electromagnetic induction coil, 10, a shell, 11, a crucible, 12, a first flap valve, 13, a second flap valve, 14, a drawing mechanism, 15, a lifting rod, 16, a fixed base, 17, a sliding base, 18, a motor, 19, a screw, 20, a sliding rail, 21, a diffusion pump, 22, a first mechanical pump set, 23, a second mechanical pump set, 24, a feeding tower, 25, a temperature measuring tower, 26, an angle cylinder, 27, a rotary base and 28, and a heating heat-insulating barrel.
Detailed Description
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1 to 6, a vacuum melting and casting furnace for metal casting comprises a melting chamber 1, a casting chamber 3, a heat preservation bag 4, a shell 10 and a drawing mechanism 14.
Thermal-insulated package 4 includes runner device 5, apron 6, heating heat preservation barrel 28, water-cooling ring 7, heat preservation heating barrel is upper and lower both ends open-ended cavity column tubular structure, apron 6 sets up in the upper end of heating heat preservation barrel 28, and runner device 5 is funnel shaped structure and sets up on apron 6, and its inside liquid metal can flow into to casting in the shell 10 along runner device 5 after 11 upsets of crucible. The water cooling ring 7 is of an annular structure and is arranged at the lower end of the heating and heat-insulating cylinder 28 and used for cooling the cast shell 10 so as to cool and solidify the liquid metal in the shell 10. The water cooling ring 7 is connected with a water cooling cable.
The casting mold chamber 3 is arranged below the smelting chamber 1, the casting mold chamber 3 is communicated with the smelting chamber 1, a second flap valve 13 is arranged at the position where the upper top end of the casting mold chamber 3 is communicated with the smelting chamber 1, and the second flap valve 13 is used for controlling the communication or isolation of the smelting chamber 1 and the casting mold chamber 3. The cast shell 10 is subjected to a cooling molding process in the molding chamber 3. The lower bottom end of the casting mold chamber 3 is provided with a through hole for a drawing mechanism 14 to pass through, and the drawing mechanism 14 is arranged below the casting mold chamber 3.
The shell 10 is arranged at the upper top end of the drawing mechanism 14, and the drawing mechanism 14 has a lifting function. Before the casting process, preheating the shell 10 outside a casting furnace, heating the shell to 1100 ℃ and preserving heat for 1h, then placing the shell 10 at the upper end of a drawing mechanism 14, enabling the drawing mechanism 14 to ascend and penetrate through a through hole at the lower bottom end of the casting chamber 3, ascending to drive the shell 10 to enter a heat preservation bag 4, and then overturning a crucible 11 to finish the casting process. After the casting operation, the drawing device 14 is lowered to bring the mould shell 10 into the mould chamber 3.
As a preferred technical solution of this embodiment, as shown in fig. 2, the heating insulation cylinder 28 of the insulation bag 4 includes a graphite cylinder 8 and an electromagnetic induction coil 9, the graphite cylinder 8 is a hollow cylinder structure with an upper opening and a lower opening, the electromagnetic induction coil 9 is sleeved outside the graphite cylinder 8, and the whole insulation bag 4 is heated by heat generated by the electromagnetic induction coil 9.
In an embodiment of the present invention, as shown in fig. 5, the drawing mechanism 14 includes a lifting rod 15, a fixed base 16, a sliding base 17, a motor 18, a screw rod 19, and a sliding rail 20. The fixed base 16 is arranged below the casting mold chamber 3, and the upper top end of the fixed base 16 is fixedly connected with the lower bottom end of the casting mold chamber 3. The fixed base 16 is provided with a slide rail 20 which is vertically arranged, the sliding base 17 is arranged on the slide rail 20 and can vertically slide along the slide rail 20, and the sliding base 17 is provided with a vertical threaded hole. The motor 18 is fixedly arranged on the fixed base 16 through a base of the motor 18, the screw rod 19 is in threaded connection with a threaded hole in the sliding base 17, one end of the screw rod 19 is connected with a rotating shaft of the motor 18, the other end of the screw rod is connected with the fixed base 16 through a bearing, the screw rod 19 can be driven to rotate by the rotation of the motor 18, and the sliding base 17 can slide up and down on the sliding rail 20 in the rotating process of the screw rod 19; the lower end of the lifting rod 15 is fixedly connected with the sliding base 17. Through the structural design, the motor 18 can rotate to drive the lifting rod 15 to ascend or descend.
The utility model discloses an in an embodiment, still include diffusion pump 21, first mechanical pump group 22, diffusion pump 21 passes through the pipeline and smelts room 1 intercommunication, first mechanical pump group 22 with be connected with diffusion pump 21, first mechanical pump group 22 and diffusion pump 21 cooperation carry out the evacuation to smelting room 1, when reaching below 0.02Pa, carry out the alloy and smelt.
In an embodiment of the present invention, the system further comprises a second mechanical pump unit 23, wherein the second mechanical pump unit 23 is respectively communicated with the feeding port 2 of the smelting chamber 1, the smelting chamber 1 and the casting mold chamber 3 through pipelines. When the feeding port 2 is charged, the second mechanical pump unit 23 works to vacuumize the position of the feeding port 2. Before the casting process is started, the second mechanical pump group 23 works to vacuumize the casting chamber 3, and when the vacuum degree consistent with the smelting chamber 1 is reached, the second flap valve 13 is opened, and the drawing mechanism 14 is lifted to the set position at the lower part of the crucible 11 to wait for casting.
In an embodiment of the present invention, the temperature measuring feeding mechanism is further included, as shown in fig. 6, the temperature measuring feeding mechanism includes a feeding tower 24, a temperature measuring tower 25, a corner cylinder 26, and a rotating base 27.
The corner cylinder 26 is vertically arranged at the upper end of the casting chamber 3 and is positioned at one side of the feeding port 2 of the casting chamber 3, the rotating base 27 is arranged on a piston rod of the corner cylinder 26, and the feeding tower 24 and the temperature measuring tower 25 are both vertically arranged columnar structures. One end of the rotating bed 27 in the longitudinal direction is connected to the side surface of the charging tower 24, and the other end of the rotating bed 27 in the longitudinal direction is connected to the side surface of the temperature measuring tower 25. When the materials need to be fed into the smelting chamber 1, the corner cylinder 26 drives the feeding tower 24 to move to the position above the feeding port 2 of the smelting chamber 1, a telescopic shaft is arranged in the feeding tower 24, a pneumatic claw clamp is arranged at the lower end of the telescopic shaft and used for clamping the materials, and the pneumatic claw clamp extends into the smelting chamber 1 through the telescopic shaft to feed the crucible 11 of the smelting chamber 1. After feeding, the corner cylinder 26 drives the temperature measuring tower 25 to move to the position above the feeding port 2 of the smelting chamber 1, a telescopic shaft is arranged in the temperature measuring tower 25, a temperature sensor is arranged at the lower end of the telescopic shaft, and the temperature sensor extends into the smelting chamber 1 through the telescopic shaft to monitor the temperature in the smelting chamber 1.
The utility model discloses a working procedure as follows:
step 1: alloy smelting; firstly, opening a first flap valve 12, clamping materials by a feeding tower 24 and conveying the materials into a crucible 11 in a smelting chamber 1, then closing the first flap valve 12, carrying out preparation in a high vacuum environment of the smelting chamber 1 by the joint work of a diffusion pump 21, a first mechanical pump group 22 and a second mechanical pump group 23, and carrying out alloy smelting when a set vacuum degree is reached. In the process, the temperature of the alloy melt is accurately measured by the temperature measuring tower 25.
And 2, step: preheating and heat preservation preparation of the shell 10; placing the preheated shell 10 at the upper end of a lifting rod 15 of a drawing mechanism 14, preparing a vacuum environment for the casting mold chamber 3 through a second mechanical pump set, opening a second flap valve 13 when the vacuum degree is consistent with that of the smelting chamber 1, lifting the lifting rod 15 of the drawing mechanism 14 to a set position in a heat-insulation bag 4 of the smelting chamber 1 at the moment, and heating and insulating the shell 10 by the heat-insulation bag 4;
and 3, step 3: casting the alloy melt; after the alloy is melted, the crucible 11 is turned over, liquid metal flows into the shell 10 through the pouring gate device 5 on the heat-insulating bag 4, the lifting rod 15 of the drawing mechanism 14 stably descends to the casting mold chamber 3 under the drive of the motor 18 after casting, in the process, the shell 10 passes through the water-cooling ring 7 to be cooled, the second flap valve 13 is closed, the vacuum of the casting mold chamber 3 is broken at the moment, and the cast shell 10 is taken out. In the process of taking the shell 10 again, a new round of metal smelting process in the smelting chamber 1 is realized through the feeding tower 24 and the temperature measuring tower 25, and the continuous production of the casting is realized by repeating the operations.
The above description is only for the purpose of creating a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (6)
1. A vacuum casting furnace is characterized by comprising a smelting chamber (1), a casting mold chamber (3), a heat-preservation bag (4), a shell (10) and a drawing mechanism (14);
the upper top end of the smelting chamber (1) is provided with a feed port (2), a first flap valve (12) is arranged at the position of the feed port (2), a crucible (11) is arranged in the smelting chamber (1) and is positioned below the feed port (2), a heat-insulating bag (4) is arranged at the lower bottom of the smelting chamber (1), and the bottom wall of the smelting chamber (1) positioned below the heat-insulating bag (4) is provided with a through hole communicated with the casting chamber (3);
the heat insulation bag (4) comprises a pouring gate device (5), a cover plate (6), a heating heat insulation cylinder body (28) and a water cooling ring (7), wherein the cover plate (6) is arranged at the upper end of the heating heat insulation cylinder body (28), the pouring gate device (5) is of a funnel-shaped structure and is arranged on the cover plate (6), and the water cooling ring (7) is of an annular structure and is arranged at the lower end of the heating heat insulation cylinder body (28);
the casting mold chamber (3) is arranged below the smelting chamber (1), the casting mold chamber (3) is communicated with the smelting chamber (1), a second flap valve (13) is arranged at a position where the upper top end of the casting mold chamber (3) is communicated with the smelting chamber (1), a through hole for a drawing mechanism (14) to pass through is formed in the lower bottom end of the casting mold chamber (3), and the drawing mechanism (14) is arranged below the casting mold chamber (3);
the shell (10) is arranged at the upper top end of the drawing mechanism (14), the drawing mechanism (14) penetrates through a through hole at the lower bottom end of the casting chamber (3), the shell (10) is driven to enter the heat preservation bag (4) by rising, and the shell (10) is driven to enter the casting chamber (3) by falling of the drawing mechanism (14).
2. Vacuum melting and casting furnace according to claim 1, characterized in that the drawing mechanism (14) comprises a lifting rod (15), a fixed base (16), a sliding base (17), a motor (18), a screw (19) and a sliding rail (20); the fixed base (16) is arranged below the casting mold chamber (3), a vertically arranged slide rail (20) is arranged on the fixed base (16), the sliding base (17) is arranged on the slide rail (20) and can vertically slide along the slide rail (20), and a vertical threaded hole is formed in the sliding base (17); the motor (18) is fixedly arranged on the fixed base (16), the screw rod (19) is in threaded connection with a threaded hole in the sliding base (17), one end of the screw rod (19) is connected with a rotating shaft of the motor (18), and the other end of the screw rod is connected with the fixed base (16) through a bearing; the lower end of the lifting rod (15) is fixedly connected with the sliding base (17).
3. The vacuum casting furnace according to claim 1, wherein the heating and heat-preserving cylinder (28) of the heat-preserving container (4) comprises a graphite cylinder (8) and an electromagnetic induction coil (9), the graphite cylinder (8) is a hollow cylinder structure with an upper opening and a lower opening, and the electromagnetic induction coil (9) is sleeved outside the graphite cylinder (8).
4. Vacuum casting furnace according to claim 1, characterized by further comprising a diffusion pump (21), a first mechanical pump group (22), said diffusion pump (21) being in communication with the melting chamber (1) through a conduit, the first mechanical pump group (22) being connected to the diffusion pump (21).
5. The vacuum casting furnace as claimed in claim 1, further comprising a temperature measuring feeding mechanism, wherein the temperature measuring feeding mechanism comprises a feeding tower (24), a temperature measuring tower (25), a corner cylinder (26) and a rotating base (27);
the device comprises a casting chamber (3), a corner cylinder (26), a rotating base (27), a feeding tower (24) and a temperature measuring tower (25), wherein the corner cylinder (26) is vertically arranged at the upper end of the casting chamber (3) and is positioned on one side of a feeding port (2) of the casting chamber (3), the rotating base (27) is arranged on a piston rod of the corner cylinder (26), the feeding tower (24) and the temperature measuring tower (25) are both vertically arranged columnar structures, one end of the rotating base (27) in the length direction is connected with the side surface of the feeding tower (24), and the other end of the rotating base (27) in the length direction is connected with the side surface of the temperature measuring tower (25).
6. A vacuum casting furnace according to claim 1, characterized by further comprising a second mechanical pump unit (23), wherein the second mechanical pump unit (23) is respectively communicated with the feeding port (2) of the melting chamber (1), the melting chamber (1) and the mold chamber (3) through pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222540267.2U CN218050271U (en) | 2022-09-26 | 2022-09-26 | Vacuum casting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222540267.2U CN218050271U (en) | 2022-09-26 | 2022-09-26 | Vacuum casting furnace |
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| Publication Number | Publication Date |
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| CN218050271U true CN218050271U (en) | 2022-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222540267.2U Active CN218050271U (en) | 2022-09-26 | 2022-09-26 | Vacuum casting furnace |
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| CN (1) | CN218050271U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2022
- 2022-09-26 CN CN202222540267.2U patent/CN218050271U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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