Annealing device for die steel production

Abstract

The annealing device for die steel production belongs to the field of die steel production, and comprises a box body, a cavity is formed in the box body, one end of the box body is open, a plurality of heating strips are fixedly installed on the inner wall of the box body, a sealing cover is arranged at the open end of the box body, the upper end of the sealing cover is hinged to the box body, and a first rotating shaft is rotatably installed in the box body; one end of the first rotating shaft penetrates through the box body, and the first rotating shaft located in the box body is hollow. A plurality of supports distributed in a circumferential array mode are fixedly installed on the first rotating shaft, clamping mechanisms used for fixing die steel are arranged on the supports, in the heating process, a servo motor drives a plurality of blades on the inner shaft to rotate and generate air flow, the high-temperature air flow in the box body is continuously guided into an inner cavity of the die steel, and therefore the die steel is heated. The temperature of the die steel inner cavity is consistent with the temperature in the box body, and the problem that the temperature inside and outside the die steel is not uniform is avoided. By keeping the internal and external temperatures of the die steel consistent, thermal stress caused by temperature difference can be reduced, so that the risks of deformation and cracking are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of die steel production, and particularly relates to an annealing device for die steel production. Background Art

[0002] The annealing device for die steel production is a kind of heat treatment equipment, mainly used for annealing die steel to improve its processing performance and service performance. The annealing device heats the die steel to a certain temperature, keeps it warm for a period of time, and then cools it at a certain speed, so that the internal structure of the die steel changes, thereby achieving the purpose of improving its hardness, toughness, processing performance, etc. The annealing process usually includes three stages: heating, holding, and cooling.

[0003] There is an existing annealing equipment and annealing method for efficient and rapid processing and production of die steel with a publication number of CN114891968B, which specifically discloses an annealing box and a third motor. The annealing box includes a heating tube member. A ring gear is arranged in the middle of the outer wall of the heating tube member. A number of through holes are distributed on both sides of the ring gear on the outer wall of the heating tube member. A number of resistance wires are distributed around the axis of the inner wall of the heating tube member, and one end of the resistance wire is in contact with a conductive slip ring. A number of L-shaped brackets are arranged at both ends of the heating tube member. The device can disperse the heating air flow inside and outside the heating tube member through the through holes on the outer wall of the heating tube member.

[0004] When the existing annealing device for die steel production anneals strip-shaped die steel, there is a through cavity inside the strip-shaped die steel. During the annealing process, there is an uneven heating phenomenon between the inner cavity and the outside of the die steel, and the air circulation in the inner cavity of the die steel is not smooth, resulting in the temperature rising speed in the inner cavity of the die steel being slower than that on the outer surface of the die steel. To solve the above problems, we propose an annealing device for die steel production. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem of uneven heating between the inner cavity and the outside of the die steel when the existing annealing device for die steel production anneals die steel, and to propose an annealing device for die steel production.

[0006] In order to achieve the above purpose, the present invention adopts the following technical scheme: An annealing device for die steel production, including a box body. There is a cavity inside the box body and one end is open. A plurality of heating strips are fixedly installed on the inner wall of the box body. A sealing cover is arranged at the open end of the box body. The upper end of the sealing cover is hinged to the box body. A first rotating shaft is rotatably installed inside the box body. One end of the first rotating shaft penetrates the box body, and the first rotating shaft inside the box body is hollow.

[0007] A plurality of brackets distributed in a circumferential array are fixedly installed on the first rotating shaft. Clamping mechanisms for fixing die steel are provided on the brackets. An inner shaft is provided in the first rotating shaft. One end of the inner shaft penetrates the first rotating shaft and is rotatably installed on the first rotating shaft. A plurality of blades are provided in the inner cavity of the first rotating shaft. The blades are fixedly installed on the inner shaft. A plurality of conduction mechanisms are installed on the first rotating shaft. The conduction mechanisms are used to introduce the airflow generated by the blades into the inner cavity of the die steel. A driving mechanism is provided outside the box body.

[0008] Preferably, the driving mechanism is used to drive the first rotating shaft to rotate intermittently and synchronously drive the blades to rotate. A controller is installed outside the box body. The controller is used to control the operation of a plurality of heating bars.

[0009] Preferably, the clamping mechanism includes two symmetrically distributed clamping plates. The lower ends of the clamping plates penetrate the brackets and can slide up and down. A screw rod penetrates through the clamping plates. The screw rod is threadedly connected to the clamping plates. The lower end of the screw rod is rotatably installed on the brackets.

[0010] Preferably, anti-slip patterns are provided on the surfaces of the clamping plates and the brackets. The brackets are provided with hollow structures. The clamping plates are provided with hollow structures.

[0011] Preferably, a plurality of air inlets are provided at one end of the first rotating shaft. The air inlets are communicated with the inner cavity of the first rotating shaft. The conduction mechanism includes a T-shaped pipe. Both ends of the T-shaped pipe are provided with openings. The T-shaped pipe is fixedly installed on the first rotating shaft and one port is communicated with the inner cavity of the first rotating shaft. An inner spline groove is provided at the other end of the T-shaped pipe. A slidable communication pipe is inserted into the T-shaped pipe. The communication pipe is L-shaped. The communication pipe is in spline fit with the T-shaped pipe and is in a communicating state. The upper end of the communication pipe is communicated and fixedly installed with an exhaust hood. The exhaust hood faces the inner cavity of the die steel. An elastic member is provided between the T-shaped pipe and the communication pipe. Both ends of the elastic member are respectively fixedly connected to the T-shaped pipe and the communication pipe.

[0012] Preferably, the driving mechanism includes a motor seat fixedly installed outside the box body. A servo motor is fixedly installed on the motor seat. The output shaft end of the servo motor is fixedly connected to the outer end of the inner shaft. An incomplete gear is fixedly installed on the output shaft of the servo motor. A gear ring is provided outside the box body. The gear ring is sleeved on the first rotating shaft and is fixedly connected to the first rotating shaft. A second rotating shaft is rotatably installed outside the box body. A first gear is fixedly installed on the second rotating shaft. The first gear meshes with the gear ring. A second gear is fixedly installed at the end of the second rotating shaft. The second gear meshes with the incomplete gear.

[0013] Preferably, a protective cover is fixedly installed outside the box body. The protective cover covers the first rotating shaft, the inner shaft, the servo motor, and the second gear.

[0014] Preferably, a pushing mechanism is provided inside the box body. The pushing mechanism is installed on multiple exhaust hoods and is used to push the multiple exhaust hoods to move.

[0015] Preferably, the pushing mechanism includes multiple inclined blocks and multiple ejector rods. The inclined blocks and the ejector rods are arranged in pairs and each pair is distributed in a circular array. The inclined blocks are provided with inclined surfaces. The inclined blocks are respectively fixedly installed on the exhaust hoods. One end of the ejector rod is fixedly installed on the inner side of the box body, and the other end of the ejector rod contacts the inclined surface on the inclined block.

[0016] Preferably, a heat insulation layer is provided outside the box body. A temperature detector is installed on the sealing cover, and the temperature measuring probe of the temperature detector is located inside the box body.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The servo motor drives the bracket on the first rotating shaft to rotate intermittently, thereby driving the die steel to rotate intermittently around the first rotating shaft inside the box body. During the heating process, the relative position between the die steel and the heating strip is continuously adjusted. By dynamically adjusting the position of the die steel and the heating strip, it can ensure that all parts of the die steel are evenly heated. This helps to avoid the phenomenon of local overheating or overcooling, thereby improving the heating uniformity.

[0018] During the heating process, the servo motor drives multiple blades on the inner shaft to rotate and generate air flow, continuously introducing the high-temperature air flow inside the box body into the inner cavity of the die steel, so that the temperature inside the inner cavity of the die steel is consistent with the temperature inside the box body, avoiding the problem of uneven temperature inside and outside the die steel. By keeping the temperature inside and outside the die steel consistent, the thermal stress caused by the temperature difference can be reduced, thereby reducing the risk of deformation and cracking.

[0019] During the rotation of the die steel, the inclined block contacts the ejector rod. The ejector rod pushes the inclined block and moves it towards the T-shaped pipe. The exhaust hood pushes the die steel to move. When the ejector rod separates from the inclined block, the elastic force of the elastic part drives the T-shaped pipe and the exhaust hood to reset. After the die steel moves, the contact surfaces between the die steel and the bracket and the clamping plate change, so that all positions on the surface of the die steel are heated, avoiding the problem that the contact surfaces between the die steel and the bracket and the clamping plate cannot be heated, and effectively reducing the heating dead angle of the die steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic three-dimensional structure diagram of an annealing device for die steel production proposed by the present invention Figure 1 ; Figure 2 is a schematic structure diagram of an annealing device for die steel production proposed by the present invention Figure 2 ; Figure 3 is a schematic internal structure diagram of the box body in an annealing device for die steel production proposed by the present invention Figure 1; Figure 4 Schematic diagram of the internal structure of the box body in an annealing device for die steel production proposed by the present invention Figure 2 ; Figure 5 Partial enlarged schematic diagram of the structure at the clamping plate in an annealing device for die steel production proposed by the present invention; Figure 6 Partial enlarged cross-sectional view of the structure at the first rotating shaft in an annealing device for die steel production proposed by the present invention; Figure 7 Enlarged schematic diagram of the structure of the driving mechanism in an annealing device for die steel production proposed by the present invention.

[0021] In the figure: box body 1, heating strip 2, sealing cover 3, first rotating shaft 4, bracket 5, inner shaft 6, blade 7, clamping plate 8, screw 9, air inlet 10, T-shaped pipe 11, connecting pipe 12, exhaust hood 13, elastic member 14, motor base 15, servo motor 16, incomplete gear 17, gear ring 18, second rotating shaft 19, first gear 20, second gear 21, protective cover 22, inclined block 23, ejector rod 24, temperature detector 25, controller 26, die steel 27. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0023] Refer to Figures 1-7 , an annealing device for die steel production, including a box body 1, the box body 1 is internally provided with a cavity and one end is open, a plurality of heating strips 2 are fixedly installed on the inner wall of the box body 1, a sealing cover 3 is arranged at the open end of the box body 1, the upper end of the sealing cover 3 is hinged on the box body 1, a first rotating shaft 4 is rotatably installed in the box body 1, one end of the first rotating shaft 4 penetrates through the box body 1, and the first rotating shaft 4 located inside the box body 1 is hollow. A plurality of brackets 5 distributed in a circumferential array are fixedly installed on the first rotating shaft 4, and a clamping mechanism for fixing die steel is provided on each of the brackets 5. An inner shaft 6 is arranged inside the first rotating shaft 4, one end of the inner shaft 6 penetrates through the first rotating shaft 4 and is rotatably installed on the first rotating shaft 4. A plurality of blades 7 are arranged in the inner cavity of the first rotating shaft 4, and the blades 7 are fixedly installed on the inner shaft 6. A plurality of conduction mechanisms are installed on the first rotating shaft 4, and the conduction mechanisms are used to introduce the air flow generated by the blades 7 into the inner cavity of the die steel. A driving mechanism is arranged outside the box body 1. The driving mechanism is used to drive the first rotating shaft 4 to rotate intermittently and synchronously drive the blades 7 to rotate.

[0024] Among them, a plurality of air inlets 10 are provided at one end of the first rotating shaft 4, and the air inlets 10 communicate with the inner cavity of the first rotating shaft 4. The conduction mechanism includes a T-shaped pipe 11 with both ends open. The T-shaped pipe 11 is fixedly installed on the first rotating shaft 4 and one port thereof communicates with the inner cavity of the first rotating shaft 4. An internal spline groove is provided at the other end of the T-shaped pipe 11. A slidable communication pipe 12 is inserted into the T-shaped pipe 11. The communication pipe 12 is L-shaped, and the communication pipe 12 is in spline fit with the T-shaped pipe 11 and is in a communicating state. An exhaust hood 13 is fixedly installed at the upper end of the communication pipe 12 and communicates with it. The exhaust hood 13 faces the inner cavity of the die steel. An elastic member 14 is provided between the T-shaped pipe 11 and the communication pipe 12, and both ends of the elastic member 14 are fixedly connected to the T-shaped pipe 11 and the communication pipe 12 respectively. The driving mechanism includes a motor base 15 fixedly installed outside the box body 1. A servo motor 16 is fixedly installed on the motor base 15. The output shaft end of the servo motor 16 is fixedly connected to the outer end of the inner shaft 6. An incomplete gear 17 is fixedly installed on the output shaft of the servo motor 16. A gear ring 18 is provided outside the box body 1. The gear ring 18 is sleeved on the first rotating shaft 4 and is fixedly connected to the first rotating shaft 4. A second rotating shaft 19 is rotatably installed outside the box body 1. A first gear 20 is fixedly installed on the second rotating shaft 19. The first gear 20 meshes with the gear ring 18. A second gear 21 is fixedly installed at the end of the second rotating shaft 19. The second gear 21 meshes with the incomplete gear 17.

[0025] A working schematic diagram of the device can be referred to Figure 3 and Figure 4 As shown, the die steel 27 is respectively placed on the brackets 5 and fixed by the clamping mechanism. The sealing cover 3 is closed and the heating strip 2 is started. The heating strip 2 heats the die steel 27. The servo motor 16 drives the incomplete gear 17 to rotate. The incomplete gear 17 intermittently drives the second gear 21 to rotate. The second gear 21 and the second rotating shaft 19 rotate synchronously. The first gear 20 on the second rotating shaft 19 rotates and drives the gear ring 18 to rotate. The gear ring 18 and the first rotating shaft 4 rotate synchronously. The brackets 5 on the first rotating shaft 4 rotate intermittently, so as to drive the die steel 27 to rotate intermittently around the first rotating shaft 4 in the box body 1, and continuously adjust the relative position between the die steel 27 and the heating strip 2 during the heating process.

[0026] By dynamically adjusting the position of the die steel and the heating strip 2, it can be ensured that all parts of the die steel are evenly heated. This helps to avoid the phenomenon of local overheating or overcooling, thereby improving the heating uniformity.

[0027] The heating uniformity is crucial for the performance of the die steel. If the heating is uneven, it may cause problems such as uneven microstructure and large hardness difference in the die steel after annealing, affecting its service performance and lifespan. Dynamically adjusting the position of the die steel and the heating strip 2 helps to accelerate the heating speed and shorten the annealing cycle. This is because uniform heating can reduce the heat loss and time waste caused by local overheating or overcooling.

[0028] After the heating is completed, keep warm for a period of time before cooling.

[0029] During the heating process, the inner shaft 6 is driven to rotate by the servo motor 16. Multiple blades 7 on the inner shaft 6 rotate to generate air flow. The air flow in the box body 1 enters the inner shaft 6 from the port of the first rotating shaft 4 and multiple air inlets 10, then enters the connecting pipe 12 through multiple T-shaped pipes 11, and finally is discharged from multiple exhaust hoods 13. The air flow discharged from the exhaust hoods 13 blows into the inner cavity of the die steel 27, so as to continuously introduce the high-temperature air flow in the box body 1 into the inner cavity of the die steel 27, making the temperature in the inner cavity of the die steel 27 consistent with the temperature in the box body 1, and avoiding the problem of uneven temperature inside and outside the die steel 27. By keeping the temperature inside and outside the die steel consistent, the thermal stress caused by temperature difference can be reduced, thereby reducing the risk of deformation and cracking.

[0030] Embodiment two proposed based on embodiment one: Refer to Figures 2-7 , the clamping mechanism includes two symmetrically distributed clamping plates 8. The lower end of the clamping plate 8 penetrates through the bracket 5 and can slide up and down. A screw rod 9 penetrates through the clamping plate 8. The screw rod 9 is threadedly connected with the clamping plate 8. The lower end of the screw rod 9 is rotatably installed on the bracket 5.

[0031] Place the die steel 27 on the bracket 5 respectively and fix it through the clamping mechanism. Specifically, place the die steel 27 between the bracket 5 and the clamping plate 8, and drive the clamping plate 8 to move down by rotating the screw rod 9. The clamping plate 8 closely adheres to the die steel 27 to realize the fixation of the die steel 27.

[0032] Anti-slip patterns are provided on the surfaces of both the clamping plate 8 and the bracket 5. By setting the anti-slip patterns, the friction between the clamping plate 8, the bracket 5 and the die steel 27 is increased. During the process of fixing the die steel 27, the die steel 27 is not likely to slide. The bracket 5 is provided with a hollow structure, and the clamping plate 8 is provided with a hollow structure, which can increase the heating area of the die steel 27 and improve the heating efficiency.

[0033] A protective cover 22 is fixedly installed outside the box body 1. The protective cover 22 covers the first rotating shaft 4, the inner shaft 6, the servo motor 16, and the second gear 21. The structures inside it are protected by the protective cover 22.

[0034] Among them, a pushing mechanism is provided inside the box body 1. The pushing mechanism is installed on multiple exhaust hoods 13 and is used to push the multiple exhaust hoods 13 to move. The pushing mechanism includes multiple inclined blocks 23 and multiple ejector rods 24. The inclined blocks 23 and the ejector rods 24 are arranged in pairs and each pair is distributed in a circular array. An inclined surface is provided on the inclined block 23. The inclined blocks 23 are respectively fixedly installed on the exhaust hoods 13. One end of the ejector rod 24 is fixedly installed on the inner side of the box body 1, and the other end of the ejector rod 24 contacts the inclined surface on the inclined block 23.

[0035] During the rotation of the die steel 27, the exhaust hood 13 rotates synchronously with the die steel 27, and the inclined block 23 on the exhaust hood 13 rotates synchronously. During the rotation of the inclined block 23, it will come into contact with the ejector rod 24. The ejector rod 24 pushes the inclined block 23 and causes it to move towards the T-shaped pipe 11. One end of the connecting pipe 12 slides within the T-shaped pipe 11 and always remains in a connected state. The elastic member 14 is compressed, and the exhaust hood 13 simultaneously pushes the die steel 27 to move. After the ejector rod 24 separates from the inclined block 23, the elastic force of the elastic member 14 drives the T-shaped pipe 11 and the exhaust hood 13 to reset. After the die steel 27 moves, the contact surfaces between the die steel 27 and the bracket 5 and the clamping plate 8 change, so that all positions on the surface of the die steel 27 are heated, avoiding the problem that the contact surfaces between the die steel 27 and the bracket 5 and the clamping plate 8 cannot be heated, and effectively reducing the heat dead angle of the die steel 27.

[0036] A controller 26 is installed outside the box body 1, and the controller 26 is used to control the operation of multiple heating bars 2. A heat insulation layer is provided outside the box body 1, and a temperature detector 25 is installed on the sealing cover 3. The temperature measuring probe of the temperature detector 25 is located inside the box body 1. By controlling the operation of the heating bars 2 through the controller 26, it is convenient to control the internal temperature of the box body 1. The box body 1 is insulated through the heat insulation layer to avoid excessive heat dissipation inside the box body 1 during the heating process. By measuring the internal temperature of the box body 1 in real time through the temperature detector 25, it is convenient to intuitively display the internal temperature of the box body 1.

[0037] Overall working principle: Place the die steel 27 on the bracket 5 respectively and fix it through the clamping mechanism. Specifically, place the die steel 27 between the bracket 5 and the clamping plate 8, and drive the clamping plate 8 to move downward by rotating the screw rod 9. The clamping plate 8 closely adheres to the die steel 27 to achieve the fixation of the die steel 27.

[0038] Close the sealing cover 3 and start the heating bars 2. The heating bars 2 heat the die steel 27. Drive the incomplete gear 17 to rotate through the servo motor 16. The incomplete gear 17 intermittently drives the second gear 21 to rotate. The second gear 21 and the second rotating shaft 19 rotate synchronously. The first gear 20 on the second rotating shaft 19 rotates and drives the gear ring 18 to rotate. The gear ring 18 and the first rotating shaft 4 rotate synchronously. The bracket 5 on the first rotating shaft 4 rotates intermittently, thereby driving the die steel 27 to rotate intermittently around the first rotating shaft 4 inside the box body 1, and continuously adjusting the relative position between the die steel 27 and the heating bars 2 during the heating process.

[0039] During the heating process, the inner shaft 6 is driven to rotate by the servo motor 16. Multiple blades 7 on the inner shaft 6 rotate to generate air flow. The air flow in the box body 1 enters the inner shaft 6 from the ports of the first rotating shaft 4 and multiple air inlets 10, then enters the connecting pipe 12 through multiple T-shaped pipes 11, and finally is discharged from multiple exhaust hoods 13. The air flow discharged from the exhaust hoods 13 blows into the inner cavity of the die steel 27, so as to continuously introduce the high-temperature air flow in the box body 1 into the inner cavity of the die steel 27, making the temperature in the inner cavity of the die steel 27 consistent with the temperature in the box body 1. During the rotation of the die steel 27, the exhaust hoods 13 rotate synchronously with the die steel 27, and the inclined blocks 23 on the exhaust hoods 13 rotate synchronously. During the rotation of the inclined blocks 23, they will come into contact with the ejector rods 24. The ejector rods 24 push the inclined blocks 23 and cause them to move towards the T-shaped pipes 11. One end of the connecting pipe 12 slides in the T-shaped pipes 11 and always remains in a connected state. The elastic member 14 is compressed, and at the same time, the exhaust hoods 13 push the die steel 27 to move. When the ejector rods 24 are separated from the inclined blocks 23, the elastic force of the elastic member 14 drives the T-shaped pipes 11 and the exhaust hoods 13 to reset. After the die steel 27 moves, the contact surfaces of the die steel 27 with the bracket 5 and the clamping plate 8 change.

[0040] After the heating is completed, keep it warm for a period of time and then carry out the cooling work. After the die steel is cooled, take out the die steel in the box body 1.

[0041] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An annealing device for the production of die steel, comprising a box body (1), the interior of the box body (1) is provided with a cavity and one end is open, a plurality of heating strips (2) are fixedly installed on the inner wall of the box body (1), a sealing cover (3) is arranged at the open end of the box body (1), the upper end of the sealing cover (3) is hinged to the box body (1), and it is characterized in that, A first rotating shaft (4) is rotatably installed inside the box body (1). One end of the first rotating shaft (4) penetrates through the box body (1), and the first rotating shaft (4) located inside the box body (1) is hollow. A plurality of brackets (5) distributed in a circumferential array are fixedly installed on the first rotating shaft (4). A clamping mechanism for fixing die steel is provided on each of the brackets (5). An inner shaft (6) is provided inside the first rotating shaft (4). One end of the inner shaft (6) penetrates through the first rotating shaft (4) and is rotatably installed on the first rotating shaft (4). A plurality of blades (7) are provided in the inner cavity of the first rotating shaft (4). The blades (7) are fixedly installed on the inner shaft (6). A plurality of conduction mechanisms are installed on the first rotating shaft (4). The conduction mechanisms are used to introduce the airflow generated by the blades (7) into the inner cavity of the die steel. A driving mechanism is provided outside the box body (1).

2. The annealing device for die steel production according to claim 1, characterized in that, The driving mechanism is used to drive the first rotating shaft (4) to rotate intermittently and synchronously drive the blades (7) to rotate. A controller (26) is installed outside the box body (1). The controller (26) is used to control the operation of a plurality of heating bars (2).

3. An annealing device for die steel production according to claim 1, characterized in that, The clamping mechanism includes two symmetrically distributed clamping plates (8). The lower ends of the clamping plates (8) penetrate through the brackets (5) and can slide up and down. A screw rod (9) penetrates through the clamping plates (8). The screw rod (9) is threadedly connected to the clamping plates (8). The lower end of the screw rod (9) is rotatably installed on the brackets (5).

4. An annealing device for the production of die steel according to claim 3, characterized in that, Anti-slip patterns are provided on the surfaces of the clamping plates (8) and the brackets (5). The brackets (5) are provided with hollow structures. The clamping plates (8) are provided with hollow structures.

5. An annealing device for die steel production according to claim 2, characterized in that, A plurality of air inlets (10) are provided at one end of the first rotating shaft (4). The air inlets (10) are communicated with the inner cavity of the first rotating shaft (4). The conduction mechanism includes a T-shaped pipe (11). Both ends of the T-shaped pipe (11) are open. The T-shaped pipe (11) is fixedly installed on the first rotating shaft (4) and one port is communicated with the inner cavity of the first rotating shaft (4). An inner spline groove is provided at the other end of the T-shaped pipe (11). A slidable connecting pipe (12) is inserted into the T-shaped pipe (11). The connecting pipe (12) is arranged in an L shape. The connecting pipe (12) is in spline fit with the T-shaped pipe (11) and is in a communicating state. The upper end of the connecting pipe (12) is communicated and fixedly installed with an exhaust hood (13). The exhaust hood (13) faces the inner cavity of the die steel. An elastic member (14) is provided between the T-shaped pipe (11) and the connecting pipe (12). Both ends of the elastic member (14) are respectively fixedly connected to the T-shaped pipe (11) and the connecting pipe (12).

6. An annealing device for die steel production according to claim 2, characterized in that, The driving mechanism includes a motor base (15) fixedly installed outside the box body (1). A servo motor (16) is fixedly installed on the motor base (15). The output shaft end of the servo motor (16) is fixedly connected to the outer end of the inner shaft (6). An incomplete gear (17) is fixedly installed on the output shaft of the servo motor (16). A gear ring (18) is provided outside the box body (1). The gear ring (18) is sleeved on the first rotating shaft (4) and fixedly connected to the first rotating shaft (4). A second rotating shaft (19) is rotatably installed outside the box body (1). A first gear (20) is fixedly installed on the second rotating shaft (19). The first gear (20) meshes with the gear ring (18). A second gear (21) is fixedly installed at the end of the second rotating shaft (19). The second gear (21) meshes with the incomplete gear (17).

7. An annealing device for the production of die steel according to claim 6, characterized in that, A protective cover (22) is fixedly installed outside the box body (1). The protective cover (22) covers the first rotating shaft (4), the inner shaft (6), the servo motor (16), and the second gear (21).

8. An annealing device for die steel production according to claim 5, characterized in that, A pushing mechanism is provided inside the box body (1). The pushing mechanism is installed on a plurality of exhaust hoods (13). The pushing mechanism is used to push the plurality of exhaust hoods (13) to move.

9. An annealing device for the production of die steel according to claim 8, characterized in that, The pushing mechanism includes a plurality of inclined blocks (23) and a plurality of ejector rods (24). The inclined blocks (23) and the ejector rods (24) are arranged in pairs and each pair is distributed in a circumferential array. An inclined surface is provided on the inclined block (23). The inclined blocks (23) are respectively fixedly installed on the exhaust hoods (13). One end of the ejector rod (24) is fixedly installed inside the box body (1). The other end of the ejector rod (24) contacts the inclined surface on the inclined block (23).

10. An annealing device for the production of die steel according to claim 1, characterized in that, A heat insulation layer is provided outside the box body (1). A temperature detector (25) is installed on the sealing cover (3). The temperature measuring probe of the temperature detector (25) is located inside the box body (1).

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