Vacuum induction melting furnace mold transmission device

Abstract

The utility model discloses a vacuum induction melting furnace die transmission device which comprises a furnace body, an automatic door is fixedly connected to the side wall of the furnace body, a first supporting frame is fixedly connected to the bottom of the inner wall of the furnace body through first supporting legs, and a second supporting frame is arranged on the side wall of the furnace body and close to the lower portion of the automatic door. The inner wall of the first supporting frame and the inner wall of the second supporting frame are rotationally connected with a first rotating shaft and a second rotating shaft through bearings correspondingly. The utility model relates to the technical field of vacuum induction melting furnace equipment, in particular to a mold transmission device of a vacuum induction melting furnace, which realizes automatic and intelligent control through the matching among a first rotating shaft, a second rotating shaft, a chain wheel, a slide way, a chain, a pulley and a bottom plate, and solves the problem that a traditional mold transmission device of the vacuum induction melting furnace is inconvenient to operate. The problem that the production efficiency is low due to the facts that the number of parts is large, the automation degree is low and modern efficient and high-precision production requirements cannot be met is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum induction melting furnace equipment, specifically a mold transmission device for a vacuum induction melting furnace. Background Technology

[0002] A vacuum induction melting furnace is a special metallurgical equipment that melts metal materials under vacuum or protective atmosphere conditions by means of medium frequency induction heating. In the operation of a vacuum induction melting furnace, the precise transmission of the mold is crucial.

[0003] In practical use, traditional vacuum induction melting furnace mold transmission devices often suffer from several drawbacks. For example, some transmission devices have complex structures and numerous parts, which not only increases the manufacturing cost of the equipment but also significantly increases the difficulty of subsequent maintenance. If a component fails, the entire transmission system may malfunction, severely impacting production progress. Furthermore, early transmission devices had low levels of automation, relying heavily on manual operation to adjust the mold position. This required highly skilled workers, and human error could easily lead to positioning deviations, affecting product quality stability. Additionally, traditional transmission devices struggle to achieve rapid and precise action switching during operation, failing to meet the demands of modern high-efficiency and high-precision production, resulting in low production efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a vacuum induction melting furnace mold transmission device, which solves the problems of low production efficiency caused by the numerous parts, low degree of automation, and inability to meet the needs of modern high-efficiency and high-precision production of traditional vacuum induction melting furnace mold transmission devices.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vacuum induction melting furnace mold transmission device, comprising a furnace body, an automatic door fixedly connected to the side wall of the furnace body, a first support frame fixedly connected to the bottom of the inner wall of the furnace body via a first support leg, a second support frame disposed on the side wall of the furnace body near the lower part of the automatic door, a first rotating shaft and a second rotating shaft rotatably connected to the inner wall of the first support frame and the inner wall of the second support frame respectively via bearings, sprockets fixedly connected to the outer walls of the first rotating shaft and the second rotating shaft respectively, chains meshing with the outer walls of the sprockets, two chains in total, both chains being fixedly connected to a base plate via buckles, and a casting mold fixedly connected to the top of the base plate, two casting molds in total.

[0006] Preferably, the ends of the first and second rotating shafts are fixedly connected to a coupling by bolts, the ends of the couplings are fixedly connected to a commutator, a connecting column is fixedly connected between the commutators, the outer wall of one end of the connecting column is rotatably connected to a support column by a bearing, and the other end of the connecting column is fixedly connected to a speed reducer.

[0007] Preferably, the surfaces of the first support frame and the second support frame are respectively provided with slide tracks, and the bottom of the base plate is fixedly connected to a pulley, with the outer wall of the pulley fitting against the inner wall of the slide track.

[0008] Preferably, a second support leg is fixedly connected to the bottom of the second support frame, and a third support leg is fixedly connected to the bottom of the reducer and the bottom of the commutator, respectively.

[0009] Preferably, a housing is bolted to the front side of the furnace body near the first rotating shaft, the first rotating shaft passes through the housing, a sealing ring is fixed to the inner wall of the housing, the inner wall of the sealing ring is attached to the outer wall of the first rotating shaft, an oil injection ring is fixed to the inner wall of the housing, and oil injection holes are respectively opened on the side wall of the housing and the side wall of the oil injection ring, and a plug is inserted into the side of the oil injection hole near the housing.

[0010] This utility model has the following beneficial effects: The vacuum induction melting furnace mold transmission device achieves automated and intelligent control through the cooperation between the first rotating shaft, the second rotating shaft, the sprocket, the slide rail, the chain, the pulley and the base plate. It can flexibly adjust the transmission speed, direction and start-stop time parameters of the mold according to different requirements of the melting process. It solves the problem of low production efficiency caused by the traditional vacuum induction melting furnace mold transmission device having many parts, low degree of automation and inability to meet the needs of modern high-efficiency and high-precision production.

[0011] By coordinating the housing, sealing ring, oil injection ring, oil injection hole, and plug, the sealing performance between the first rotating shaft and the furnace body is improved. This solves the problems of easy failure of the seal at the point where the first rotating shaft passes through the furnace body in the transmission device, which can lead to the destruction of the vacuum environment inside the furnace or the intrusion of external impurities into the molten metal, as well as the lack of long-term lubrication of the rotating shaft, which can lead to increased friction and wear at high temperatures. Attached Figure Description

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 for Figure 1 Exploded view;

[0014] Figure 3 for Figure 2 A structural schematic diagram of the first rotating shaft, the first support frame, and the first support leg;

[0015] Figure 4 for Figure 2 Structural diagram of the middle chain, base plate, and mold;

[0016] Figure 5 for Figure 2A schematic diagram of the structure of the second rotating shaft, the second support frame, and the second support leg;

[0017] Figure 6 for Figure 2 A schematic diagram of the middle shell structure.

[0018] In the diagram: 1. Furnace body; 2. Automatic door; 3. Reducer; 4. Connecting column; 5. Reversing device; 6. Support column; 7. First rotating shaft; 8. Second rotating shaft; 9. First support frame; 10. Sprocket; 11. Slide rail; 12. First support leg; 13. Chain; 14. Pulley; 15. Base plate; 16. Casting mold; 17. Shell; 18. Sealing ring; 19. Oil injection ring; 20. Oil injection hole; 21. Block; 22. Second support frame; 23. Second support leg; 24. Third support leg; 25. Coupling. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] Example 1, by Figures 1-6 It is understood that the vacuum induction melting furnace mold transmission device in this case includes a furnace body 1, an automatic door 2 fixedly connected to the side wall of the furnace body 1, a first support frame 9 fixedly connected to the bottom of the inner wall of the furnace body 1 through a first support leg 12, a second support frame 22 provided on the side wall of the furnace body 1 near the lower part of the automatic door 2, a first rotating shaft 7 and a second rotating shaft 8 respectively rotatably connected to the inner wall of the first support frame 9 and the inner wall of the second support frame 22 through bearings, a sprocket 10 fixedly connected to the outer wall of the first rotating shaft 7 and the second rotating shaft 8 respectively, a chain 13 meshing with the outer wall of the sprocket 10, two chains 13, a base plate 15 fixedly connected to both chains 13 through buckles, a casting mold 16 fixedly connected to the top of the base plate 15, two casting molds 16;

[0021] In the specific implementation process, it is worth noting that the sprocket 10, chain 13, pulley 14, and base plate 15 form the mold car, and the automatic door 2 is a ZKF-VD series vacuum isolation automatic door (suitable for vacuum degree ≤10⁻). 5Pa, operating temperature ≤1500℃), this model of door adopts a double-layer stainless steel frame structure (outer layer 304 stainless steel, inner layer 316L stainless steel), door panel thickness 12mm, equipped with an imported servo drive system (response time ≤0.5s) and fluororubber sealing ring (temperature resistance -20℃~200℃), can be linked with the mold transmission system through PLC, the door opening and closing stroke accuracy is ±0.2mm, meeting the requirements of high frequency (≥1000 times / day) operation, the bottom of the first support leg 12 can be connected to the furnace body 1 by bolts, this The bolts are M12×30mm 12.9 grade high-strength internal hex bolts. The first shaft 7 and the second shaft 8 are made of 40CrNiMoA alloy structural steel. The bearing between the first support frame 9 and the first shaft 7 is a 7010C angular contact ball bearing. The sprocket 10 is made of 20CrMnTi carburized steel. The chain 13 is made of 08B-1 stainless steel roller chain. The base plate 15 is made of 6061-T6 aluminum alloy. The first support frame 9 and the second support frame 22 are made of Q355B low alloy high-strength structural steel. The first support leg 12 is made of Q235B steel.

[0022] Transmission components (such as bearings) use vacuum grease to avoid the volatilization of ordinary grease and contamination of the furnace environment. An expansion gap (0.2-0.5mm) is reserved between the sealing seat and the mold car to prevent thermal deformation from causing seal failure. Before the mold car moves as a whole, it is necessary to confirm that the vacuum level in the furnace meets the standard (by detecting the pressure sensor) to prevent air from entering the furnace and causing safety accidents. During the casting process, the mold car's overall movement function is locked to avoid misoperation that could interrupt the casting process.

[0023] When moving the casting mold 16, the operator activates the automatic door 2 via an external controller to open the furnace body 1. Then, the first rotating shaft 7 and the second rotating shaft 8 rotate, driving the sprocket 10 to rotate. The sprocket 10 drives the chain 13 to move, which in turn moves the base plate 15. The base plate 15 then moves the casting mold 16, moving it from the second support frame 22 to the first support frame 9 inside the furnace body 1. Once the left-side casting mold 16 is in place (the position is confirmed by an encoder, which monitors the number of motor rotations in real time and calculates the base plate position based on the transmission mechanism's tooth pitch), the process is complete. The plate 15 is displaced, and the PLC system is used for closed-loop control to ensure that the repeatability of the positioning is ≤±1mm. This stops the first rotating shaft 7 and the second rotating shaft 8 from rotating. The melting inside the furnace body 1 is completed and poured into the left mold, and the first casting begins. After the casting of the left casting mold 16 is completed, the first rotating shaft 7 and the second rotating shaft 8 are rotated again, so that the right mold is replaced by the left mold. After the right mold is in place, the casting process is repeated. Through the alternating operation of the two molds, continuous or semi-continuous production can be carried out, realizing automated and intelligent control. The transmission speed, direction and start-stop time parameters of the mold can be flexibly adjusted according to the different requirements of the melting process.

[0024] Furthermore, the ends of the first rotating shaft 7 and the second rotating shaft 8 are fixedly connected to the coupling 25 by bolts, the end of the coupling 25 is fixedly connected to the commutator 5, the commutator 5 is fixedly connected to the connecting column 4, the outer wall of one end of the connecting column 4 is rotatably connected to the support column 6 through the bearing, and the other end of the connecting column 4 is fixedly connected to the reducer 3.

[0025] In the specific implementation process, it is worth noting that the commutator 5 is a WX-10 type cross shaft universal commutator, the coupling 25 is an MLZ type plum blossom-shaped flexible coupling, such as MLZ5, and the reducer 3 is an RV series worm gear reducer, such as RV50-30. The reducer 3 has a motor fixed to its front, which is a 110ST-M04030 type servo motor. There are three commutators 5, three couplings 25, and three reducers 3. There are three connecting columns 4, and the one on the right is supported by a support column 6. When the casting mold 16 needs to be moved, the operator connects the motor on the front of the reducer 3 to an external power supply. The motor drives the reducer 3 to rotate the connecting columns 4 on both sides, thereby driving the two corresponding commutators 5 to rotate. These two commutators 5 drive the first rotating shaft 7 to rotate. At the same time, the steering gear 5 in the middle position drives the right connecting column 4 to rotate, thereby driving the right steering gear 5 to rotate. This steering gear 5 drives the second rotating shaft 8 to rotate, realizing the overall automation of the mold rotation device.

[0026] Furthermore, slide rails 11 are respectively provided on the surface of the first support frame 9 and the surface of the second support frame 22, and a pulley 14 is fixedly connected to the bottom of the base plate 15, with the outer wall of the pulley 14 fitting against the inner wall of the slide rail 11.

[0027] In the specific implementation process, it is worth noting that the pulley 14 is made of polytetrafluoroethylene, which has good self-lubricating properties. It can slide smoothly without additional lubrication in high temperature and vacuum environments, and has high precision in matching with the slide rail 11, ensuring the linear motion accuracy of the base plate 15. When the base plate 15 moves, the base plate 15 drives the pulley 14 to move along the slide rail 11, which limits the pulley and prevents it from deviating, while also supporting the base plate 15.

[0028] Furthermore, a second support leg 23 is fixedly connected to the bottom of the second support frame 22, and a third support leg 24 is fixedly connected to the bottom of the reducer 3 and the bottom of the commutator 5 respectively.

[0029] In the specific implementation process, it is worth noting that the material of the second support leg 23 and the third support leg 24 is Q235B, which is rust-proofed. The second support leg 23 and the third support leg 24 support the second support frame 22, the commutator 5 and the reducer 3 respectively, ensuring the stability of the relative position of the transmission system and the furnace body.

[0030] Example 2, by Figure 1 , Figure 2 and Figure 6 It can be seen that the front side of the furnace body 1 is fixed to the shell 17 by bolts on the side near the first rotating shaft 7. The first rotating shaft 7 passes through the shell 17. The inner wall of the shell 17 is fixed to a sealing ring 18. The inner wall of the sealing ring 18 is attached to the outer wall of the first rotating shaft 7. The inner wall of the shell 17 is fixed to an oil injection ring 19. The side wall of the shell 17 and the side wall of the oil injection ring 19 are respectively provided with oil injection holes 20. A plug 21 is inserted into the side of the oil injection hole 20 near the shell 17.

[0031] In the specific implementation process, it is worth noting that the shell 17 is made of stainless steel, such as 304 stainless steel, the sealing ring 18 is made of fluororubber, the oil injection ring 19 is made of brass, and the plug 21 is made of rubber.

[0032] The fluororubber sealing ring 18 on the inner wall of the shell 17 is tightly fitted to the outer wall of the first rotating shaft 7 under the action of pre-tightening force, forming an initial radial seal. During the vacuuming process of the furnace body 1, the sealing ring 18 is further pressed against the rotating shaft surface under the action of internal and external pressure difference to compensate for the small gap. When the first rotating shaft 7 rotates, the sealing ring 18 maintains dynamic contact with the shaft surface. The low coefficient of friction of the fluororubber material can reduce frictional heat generation, and its elastic deformation ability can absorb the small radial runout of the rotating shaft to maintain the sealing performance. The staff can replace the sealing ring 18 regularly.

[0033] The staff can periodically remove the plug 21 from the oil injection hole 20 and inject vacuum grease (such as perfluoropolyether grease, which will not volatilize or decompose under high vacuum and high temperature conditions) into the mating area between the first rotating shaft 7 and the oil injection ring 19 through the oil injection hole 20. After completion, the staff can reinsert the plug 21 into the oil injection hole 20, which can effectively lubricate the first rotating shaft 7, reduce friction and wear, and improve the sealing between the first rotating shaft 7 and the furnace body 1.

Claims

1. A mold transmission device for a vacuum induction melting furnace, comprising a furnace body (1), characterized in that: An automatic door (2) is fixedly connected to the side wall of the furnace body (1). A first support frame (9) is fixedly connected to the bottom of the inner wall of the furnace body (1) via a first support leg (12). A second support frame (22) is provided on the side wall of the furnace body (1) near the bottom of the automatic door (2). A first rotating shaft (7) and a second rotating shaft (8) are respectively rotatably connected to the inner wall of the first supporting frame (9) and the inner wall of the second supporting frame (22) via bearings. A sprocket (10) is fixedly connected to the outer wall of the first rotating shaft (7) and the second rotating shaft (8). A chain (13) is meshed with the outer wall of the sprocket (10). There are two chains (13). Both chains (13) are fixedly connected to a base plate (15) via buckles. A casting mold (16) is fixedly connected to the top of the base plate (15). There are two casting molds (16).

2. The vacuum induction melting furnace mold transmission device according to claim 1, characterized in that: The ends of the first shaft (7) and the second shaft (8) are fixedly connected to a coupling (25) by bolts. The ends of the coupling (25) are fixedly connected to a commutator (5). A connecting column (4) is fixedly connected between the commutators (5). A support column (6) is rotatably connected to the outer wall of the connecting column (4) at one end by a bearing. A speed reducer (3) is fixedly connected to the connecting column (4) at the other end.

3. The vacuum induction melting furnace mold transmission device according to claim 1, characterized in that: The surface of the first support frame (9) and the surface of the second support frame (22) are respectively provided with slide rails (11), and the bottom of the base plate (15) is fixed with a pulley (14), and the outer wall of the pulley (14) is attached to the inner wall of the slide rail (11).

4. The vacuum induction melting furnace mold transmission device according to claim 3, characterized in that: The bottom of the second support frame (22) is fixed with a second support leg (23).

5. The vacuum induction melting furnace mold transmission device according to claim 2, characterized in that: The bottom of the reducer (3) and the bottom of the commutator (5) are respectively fixed with a third support leg (24).

6. The vacuum induction melting furnace mold transmission device according to claim 1, characterized in that: The furnace body (1) has a shell (17) fixed to the side of the front of the furnace body (1) near the first rotating shaft (7) by bolts. The first rotating shaft (7) passes through the shell (17). A sealing ring (18) is fixed to the inner wall of the shell (17). The inner wall of the sealing ring (18) is attached to the outer wall of the first rotating shaft (7). An oil injection ring (19) is fixed to the inner wall of the shell (17). An oil injection hole (20) is opened on the side wall of the shell (17) and the side wall of the oil injection ring (19). A plug (21) is inserted into the side of the oil injection hole (20) near the shell (17).

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