Vacuum oil quenching furnace with stirring function

Abstract

The utility model discloses a vacuum oil quenching furnace with stirring function belongs to vacuum oil quenching furnace technical field. Including the furnace body and the furnace cover, the furnace cover is hinged with the furnace body through the hinge, and the furnace cover is locked and fixed with the furnace body, and the inside of furnace body is equipped with the gas outlet, and the gas outlet is connected with the gas outlet pipe, and the inside of furnace body is slid with the connecting frame, and the connecting frame is suspended in the inside of furnace body, and the inside of connecting frame is rotatably connected with the shaft, and the outside of shaft is distributed with four sets of fixed frame, and the inside of fixed frame is all installed with three sets of clamp, and the clamp is used for clamping the plate -shaped work piece, and the outside of furnace body is installed with motor, and the motor is connected with the shaft transmission, and the top of furnace body is installed with a plurality of shower nozzles, and a plurality of shower nozzles are arranged vertically, and a plurality of shower nozzles are connected with the oil injection pipe, and the inside of fixed frame is suspended with the plate -shaped work piece through the clamp, and is suspended and fixed, and rotates through the motor drive shaft, and makes every work piece all can be close to the shower nozzle, thereby realizes the consistency to the work piece quenching.

Description

Technical Field

[0001] This utility model relates to the field of vacuum oil quenching furnace technology, specifically a vacuum oil quenching furnace with a stirring function. Background Technology

[0002] Vacuum oil quenching furnaces are key equipment in the field of metal heat treatment. They heat workpieces in a vacuum environment and then quickly immerse the high-temperature workpieces in quenching oil to achieve cooling and hardening. This effectively avoids oxidation and decarburization of the workpieces and ensures the surface quality and mechanical properties of the treated workpieces. They are widely used in the processing of precision parts such as cutting tools, molds, and bearings.

[0003] In the quenching process of a traditional vacuum oil quenching furnace, the workpiece is usually placed statically on a fixture or rack and immersed in quenching oil. The quenching oil is typically delivered to the quenching area through a specific outlet. However, there are significant differences in the distance between the statically placed workpiece and the outlet: workpieces closer to the outlet receive continuous contact with fresh, low-temperature quenching oil, resulting in rapid and efficient cooling; while workpieces farther from the outlet are in contact with pre-existing high-temperature oil, leading to slower and less effective cooling. This difference in cooling due to distance from the outlet can cause significant deviations in the workpiece's hardness and microstructure, severely affecting the consistency of quenching quality. For parts with extremely high precision requirements, this can even lead to product scrap. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum oil quenching furnace with a stirring function to solve the problems mentioned in the background art.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0006] A vacuum oil quenching furnace with a stirring function includes a furnace body and a furnace cover. The furnace cover and furnace body are hinged together and locked together. An air outlet is provided on the inner side of the furnace body, and the air outlet is connected to an air outlet pipe. A connecting frame slides inside the furnace body and is suspended inside the furnace body. A rotating shaft is rotatably connected inside the connecting frame. Four sets of fixing brackets are evenly distributed around the outer side of the rotating shaft. Three sets of clamps are installed on the inner side of each fixing bracket for clamping. The furnace body contains a plate-shaped workpiece. A motor is installed on the outside of the furnace body and is connected to a rotating shaft. Several nozzles are installed on the top of the furnace body and are arranged longitudinally. The nozzles are connected to an oil injection pipe. The motor drives the rotating shaft to rotate, which in turn drives the plate-shaped workpieces on the fixed frame and fixture to rotate synchronously. This allows each workpiece to alternately approach the longitudinally arranged nozzles and uniformly contact the quenching oil, solving the temperature difference problem of "rapid cooling near oil and slow cooling far oil" in traditional static quenching and ensuring the consistency of the hardness and microstructure of the workpiece after quenching.

[0007] Furthermore, the fixture includes a first fixing plate and a second fixing plate installed inside the fixed frame, with a gap between the first fixing plate and the second fixing plate, and a clamping plate sliding within the gap. A screw is threadedly connected to the outer side of the second fixing plate, and the tail end of the screw is connected to the clamping plate. The distance between the clamping plate and the first fixing plate can be adjusted by the screw to accommodate plate-shaped workpieces of different thicknesses, providing stable clamping and convenient operation. The cooperation between the fixing plate and the clamping plate prevents the workpiece from loosening during rotary quenching, ensuring uniform cooling.

[0008] Furthermore, the clamping plate is made of ceramic fiber board, which is elastic and can buffer pressure during clamping to avoid scratching the workpiece surface; at the same time, it increases the friction with the workpiece and improves the clamping stability.

[0009] Furthermore, one end of the rotating shaft passes through the connecting frame and is coaxially connected to a gear. The furnace body is equipped with an internal gear disk. The output end of the motor is connected to the internal gear disk for transmission. The gear and the internal gear disk are meshed and connected. The gear and the internal gear disk mesh and transmit power stably to the rotating shaft, ensuring that the workpiece rotates at a uniform speed and avoiding uneven cooling caused by speed fluctuations. The meshing structure has a strong load-bearing capacity and is suitable for quenching heavy workpieces.

[0010] Furthermore, a flow guide is installed on the side of the internal gear disk. The flow guide is conical and can guide the quenching oil to flow towards the workpiece area, reducing oil splashing loss and preventing the oil from directly impacting the gear and internal gear disk, thus extending the service life of the transmission components.

[0011] Furthermore, the inner wall of the furnace body is provided with a pair of sliding grooves, and the wall surface of the sliding grooves is provided with limiting grooves. The length of the limiting grooves is less than the length of the sliding grooves, and the end face of the limiting grooves does not penetrate the end face of the sliding grooves. A pair of limiting blocks are installed on the side of the connecting frame near its end. The two sides of the connecting frame slide within the pair of sliding grooves, and the limiting blocks slide within the limiting grooves. A handle is installed on the side of the connecting frame. The sliding grooves and limiting blocks cooperate to guide the connecting frame to smoothly enter and exit the furnace body. The limiting grooves restrict the sliding stroke of the connecting frame to prevent it from completely detaching from the furnace body. The handles are convenient for operators to push and pull, improving the convenience of loading and unloading workpieces.

[0012] Furthermore, the furnace body has several liquid outlet grooves near its bottom, and liquid outlet pipes are connected between the liquid outlet grooves. The free end of each liquid outlet pipe is connected to a valve body. The hot oil after quenching is discharged in a concentrated manner through the liquid outlet grooves and liquid outlet pipes. The valve body can control the discharge speed, which facilitates the recycling and reuse of quenching oil. At the same time, it can seal the liquid outlet pipes to ensure the vacuum state inside the furnace body during quenching. Multiple sets of liquid outlet grooves accelerate the discharge and prevent oil accumulation in the furnace from affecting the next quenching.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the vacuum oil quenching furnace with stirring function has a motor-driven rotating shaft that drives the plate-shaped workpieces on the fixed frame and fixture to rotate synchronously, so that each workpiece can alternately approach the longitudinally arranged nozzles and uniformly contact the quenching oil, solving the temperature difference problem of "rapid cooling near oil and slow cooling far oil" in traditional static quenching, and ensuring the consistency of the hardness and microstructure of the workpiece after quenching. Attached Figure Description

[0014] Figure 1 This is a first three-dimensional structural schematic diagram of a vacuum oil quenching furnace with stirring function disclosed in an embodiment of the present utility model.

[0015] Figure 2 This is a second three-dimensional structural schematic diagram of a vacuum oil quenching furnace with stirring function disclosed in an embodiment of the present utility model;

[0016] Figure 3 for Figure 2 Enlarged schematic diagram of structure A in the middle;

[0017] Figure 4 This is a third three-dimensional structural diagram of a vacuum oil quenching furnace with stirring function disclosed in an embodiment of the present utility model;

[0018] Figure 5 for Figure 4 A magnified schematic diagram of the B-structure.

[0019] In the diagram: 1. Furnace body; 2. Furnace cover; 3. Gas outlet pipe; 4. Valve body; 5. Slide groove; 6. Connecting frame; 7. Limiting block; 8. Handle; 9. Rotating shaft; 10. Fixing frame; 11. Gear; 12. First fixing plate; 13. Second fixing plate; 14. Screw; 15. Clamping plate; 16. Gas outlet; 17. Liquid outlet groove; 18. Limiting groove; 19. Internal gear plate; 20. Drainage cover. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 - Figure 5This utility model provides a technical solution: a vacuum oil quenching furnace with a stirring function, including a furnace body 1 and a furnace cover 2. The furnace cover 2 and the furnace body 1 are hinged together and locked together. An air outlet 16 is provided on the inner side of the furnace body 1, and an air outlet pipe 3 is connected to the air outlet 16. A connecting frame 6 slides inside the furnace body 1 and is suspended inside the furnace body 1. A rotating shaft 9 is rotatably connected inside the connecting frame 6. Four sets of fixing brackets 10 are evenly distributed around the outer side of the rotating shaft 9. Three sets of clamps are installed on the inner side of each fixing bracket 10. The clamps are used to clamp plate-shaped workpieces. The furnace body 1 has a motor installed on its outer side, which is connected to the rotating shaft 9. Several nozzles are installed on the top of the furnace body 1, and these nozzles are arranged longitudinally. The nozzles are connected to the oil injection pipe. The workpiece is fixed on the fixed frame 10 by a clamp. The furnace body 1 is evacuated by a vacuum pump through the gas outlet pipe 3. During quenching, the oil injection pipe injects quenching oil into the furnace through the nozzles. The motor drives the rotating shaft 9 to rotate, and the workpiece moves in a circular motion with the fixed frame 10, passing through the nozzle areas in sequence and receiving quenching oil spray evenly, achieving "stirring" uniform cooling. The connecting frame 6 can slide in and out of the furnace body 1, which is convenient for loading and unloading workpieces.

[0022] As an embodiment of this utility model, the fixture further includes a first fixing plate 12 and a second fixing plate 13 installed on the inner side of the fixing frame 10, with a gap between the first fixing plate 12 and the second fixing plate 13, and a clamping plate 15 sliding in the gap. A screw 14 is threadedly connected to the outer side of the second fixing plate 13, and the tail end of the screw 14 is connected to the clamping plate 15. When the plate-shaped workpiece is placed between the first fixing plate 12 and the clamping plate 15, the screw 14 is tightened to push the clamping plate 15 to move towards the first fixing plate 12 until the workpiece is clamped. During the quenching process, the rigid constraint of the fixture prevents the workpiece from shifting due to centrifugal force or oil flow impact.

[0023] As an embodiment of this utility model, the clamping plate 15 is further made of ceramic fiber board. When the ceramic fiber board comes into contact with the workpiece, it undergoes slight deformation, which increases the contact area and wraps around the edge of the workpiece, thus preventing the workpiece from sliding and avoiding surface damage caused by direct contact with the metal clamp.

[0024] As an embodiment of this utility model, one end of the rotating shaft 9 passes through the connecting frame 6 and is coaxially connected to the gear 11. The furnace body 1 is provided with an internal gear disk 19. The output end of the motor is connected to the internal gear disk 19. The gear 11 and the internal gear disk 19 are meshed. The motor drives the internal gear disk 19 to rotate. The internal gear disk 19 drives the gear 11 and the rotating shaft 9 to rotate through the gear teeth. The gear transmission ratio is fixed so that the rotation speed of the rotating shaft 9 is strictly matched with the motor output to ensure the stable rotation rhythm of the workpiece.

[0025] As an embodiment of this utility model, a flow guide hood 20 is further installed on the side of the internal gear disk 19. The flow guide hood 20 is conical. After the quenching oil is sprayed from the nozzle, some of the oil flows down along the inner wall of the furnace body 1. The conical surface of the flow guide hood 20 guides the oil to the bottom of the furnace body 1, reducing the contamination of the gear meshing area. At the same time, the oil flow is gathered to enhance the cooling effect on the bottom of the workpiece.

[0026] As an embodiment of this utility model, the inner wall of the furnace body 1 is further provided with a pair of sliding grooves 5, and the wall surface of the sliding grooves 5 is provided with a limiting groove 18. The length of the limiting groove 18 is less than the length of the sliding groove 5, and the end face of the limiting groove 18 does not penetrate the end face of the sliding groove 5. A pair of limiting blocks 7 are installed on the side of the connecting frame 6 near its end. The two sides of the connecting frame 6 slide in the pair of sliding grooves 5, and the limiting blocks 7 slide in the limiting groove 18. A handle 8 is installed on the side of the connecting frame 6. The operator pushes the connecting frame 6 through the handle 8 to make it slide into the furnace body 1 along the sliding grooves 5. The limiting blocks 7 slide in the limiting groove 18 until the limiting blocks 7 abut against the end of the limiting groove 18, and the connecting frame 6 is positioned. Conversely, the connecting frame 6 can be slid out to facilitate the picking and placing of workpieces.

[0027] As an embodiment of this utility model, further, the furnace body 1 has a plurality of liquid outlet grooves 17 near its bottom end, and liquid outlet pipes are connected between the plurality of liquid outlet grooves 17. The free end of the liquid outlet pipes is connected to a valve body 4. After quenching is completed, the valve body 4 is opened, and the quenching oil in the furnace flows into the liquid outlet pipes through the liquid outlet grooves 17 under the action of gravity, and flows out of the furnace body 1 through the valve body 4, so as to realize the rapid discharge and recovery of oil, and prepare for the next round of quenching process.

[0028] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a control cabinet. The control circuit can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Furthermore, since this application is mainly used to protect mechanical devices, this application will not explain the control method and circuit connection in detail.

Claims

1. A vacuum oil quenching furnace with a stirring function, characterized in that, The furnace includes a furnace body (1) and a furnace cover (2). The furnace cover (2) and the furnace body (1) are hinged together and locked together. An air outlet (16) is provided on the inner side of the furnace body (1). The air outlet (16) is connected to an air outlet pipe (3). A connecting frame (6) slides inside the furnace body (1) and is suspended inside the furnace body (1). A rotating shaft (9) is rotatably connected inside the connecting frame (6). Four sets of fixing frames (10) are evenly distributed around the outer side of the rotating shaft (9). Three sets of clamps are installed on the inner side of each fixing frame (10). The clamps are used to hold plate-shaped workpieces. A motor is installed on the outer side of the furnace body (1). The motor is connected to the rotating shaft (9) for transmission. Several nozzles are installed on the top of the furnace body (1). The nozzles are arranged longitudinally and connected to an oil injection pipe.

2. The vacuum oil quenching furnace with stirring function according to claim 1, characterized in that, The clamp includes a first fixing plate (12) and a second fixing plate (13) installed inside the fixing frame (10), and there is a gap between the first fixing plate (12) and the second fixing plate (13), and a clamping plate (15) slides in the gap. A screw (14) is threadedly connected to the outer side of the second fixing plate (13), and the tail end of the screw (14) is connected to the clamping plate (15).

3. A vacuum oil quenching furnace with a stirring function according to claim 2, characterized in that, The clamp (15) is a ceramic fiberboard.

4. A vacuum oil quenching furnace with a stirring function according to claim 1, characterized in that, One end of the rotating shaft (9) passes through the connecting frame (6) and is coaxially connected to a gear (11). The furnace body (1) is provided with an internal gear disk (19). The output end of the motor is connected to the internal gear disk (19) for transmission. The gear (11) and the internal gear disk (19) are meshed together.

5. A vacuum oil quenching furnace with a stirring function according to claim 4, characterized in that, The inner toothed disc (19) is equipped with a flow hood (20) on its side, and the flow hood (20) is conical.

6. A vacuum oil quenching furnace with a stirring function according to claim 1, characterized in that, The inner wall of the furnace body (1) is provided with a pair of sliding grooves (5). The wall surface of the sliding grooves (5) is provided with a limiting groove (18). The length of the limiting groove (18) is less than the length of the sliding groove (5). The end face of the limiting groove (18) does not penetrate the end face of the sliding groove (5). A pair of limiting blocks (7) are installed on the side of the connecting frame (6) near its end. The two sides of the connecting frame (6) slide in the pair of sliding grooves (5). The limiting blocks (7) slide in the limiting grooves (18). A handle (8) is installed on the side of the connecting frame (6).

7. A vacuum oil quenching furnace with stirring function according to claim 1, characterized in that, The furnace body (1) has several liquid outlet grooves (17) near its bottom. The liquid outlet grooves (17) are connected to each other by a liquid outlet pipe, and the free end of the liquid outlet pipe is connected to a valve body (4).

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