Air furnace for heat treatment of gear forging die

Abstract

The utility model relates to the technical field of gear forging dies, and discloses an air furnace for heat treatment of a gear forging die, which comprises a furnace body and an arranged electric heating tube, the rear end of the threaded lead screw is coaxially connected with a second driving motor, and the rear end of the threaded lead screw is sleeved with a first sliding block; the heat insulation side plates are connected with the first sliding blocks, hydraulic rods are installed on the outer side of the furnace body, and clamping plates are additionally arranged on the inner side of the furnace body. According to the air furnace for heat treatment of the gear forging die, after the die is fixed in the inner cavity of the furnace body through a hydraulic rod and a clamping plate, an electric heating pipe is powered on for temperature rise, a second driving motor drives a threaded lead screw to rotate on the furnace body, and a first sliding block drives a heat insulation side plate to move and be separated from the furnace body according to the rotating direction of the threaded lead screw; and after the thermal insulation side plate drives the clamping plate and the mold to move to the outside of the furnace body, the hydraulic rod drives the clamping plate to be separated from the mold, so that the mold falls onto material receiving equipment. And automatic material taking operation of the die can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of gear forging die technology, specifically to an air furnace for heat treatment of gear forging dies. Background Technology

[0002] Gear forging dies are essential tools in gear manufacturing, playing a crucial role in the gear forging process. The design elements of gear forging dies include die structure, die material, and die machining precision. The manufacturing process of gear forging dies involves multiple stages, including die design, material selection, machining, and heat treatment. The heat treatment stage involves subjecting the die to heat treatment to improve its hardness and wear resistance, thereby extending its service life. Heating equipment is a key component in the heat treatment process, such as vacuum furnaces, salt bath furnaces, and air furnaces.

[0003] A typical air furnace for heat treatment of gear forging dies usually consists of a furnace shell, furnace lining, furnace chamber, heating elements, ventilation system, and exhaust system. The die is first placed inside the furnace shell, then the heating elements in the furnace chamber are energized and heated to heat the die. The ventilation system maintains airflow within the furnace chamber, and the exhaust system removes waste gases and harmful gases.

[0004] Traditional air furnaces for heat treatment of gear forging dies involve first installing a rack inside the furnace chamber, then placing the die on top of the rack. The heating elements are typically installed at the bottom of the rack, resulting in uneven heating at the bottom or contact surfaces of the die compared to other parts. This also compromises the stability of the die. To address these issues, some air furnaces for gear forging dies incorporate clamps inside the furnace to hold and fix the die within the furnace chamber. During operation, the clamps periodically rotate the die, ensuring even heating and preventing movement during heat treatment. However, this method suffers from drawbacks. Since the clamps are usually fixed to the center of the furnace chamber with bolts, the temperature of the die and clamp structure drops slowly after heat treatment, making it difficult to remove the die from the furnace. Therefore, this paper proposes an air furnace for heat treatment of gear forging dies. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an air furnace for heat treatment of gear forging dies, thereby solving the aforementioned technical problem of the inconvenience in removing the dies from the air furnace.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an air furnace for heat treatment of gear forging dies, comprising:

[0009] The furnace body, and the door panel on the front of the furnace body, and the inner wall of the furnace body has positioning holes on both sides of the back side, and positioning grooves are provided on the upper and lower parts of both sides of the inner wall of the furnace body, and an electric heating tube is added to the bottom of the inner cavity of the furnace body.

[0010] A threaded screw is located at the upper and lower center of both sides of the furnace body, and a second drive motor is coaxially connected to the rear end of the threaded screw, and a first slider is sleeved on the rear end of the threaded screw.

[0011] Insulating side plates are located at the center of both sides of the furnace body and connected to the first slider. A hydraulic rod is installed on the outer side of the furnace body, and a clamping plate is added to the inner side. Positioning posts are installed on the back of the furnace body, corresponding to positioning holes. Positioning blocks are added to the top and bottom of the furnace body, corresponding to positioning grooves. After the mold is fixed in the inner cavity of the furnace body by the hydraulic rod and clamping plate, the electric heating tube is energized to heat the mold. After heat treatment, the second drive motor drives the threaded screw to rotate on the furnace body. The first slider, according to the direction of the threaded screw, moves the insulating side plates and separates them from the furnace body. After the insulating side plates, clamping plates, and mold move to the outside of the furnace body, the hydraulic rod drives the clamping plate to separate from the mold, allowing the mold to fall onto the receiving equipment. On the one hand, the mold can be unloaded without waiting for the temperature of the mold and clamping structure to drop, making it easier to remove the mold from the air furnace. On the other hand, it not only automates the unloading of the mold but also allows the clamping structure to be moved to the outside of the furnace body, facilitating the fixing of the mold to the clamping structure.

[0012] Preferably, a first drive motor is installed directly above the outer side of the door panel, and the first drive motor is coaxially connected to a rotating shaft, which is connected to the top of the door panel. The first drive motor drives the rotating shaft to rotate on the furnace body, so that the rotating shaft drives the door panel to rotate in the same direction, which facilitates the adjustment and fixing of the door panel.

[0013] Preferably, a rotating seat is rotatably connected to the outer center of the heat-insulating side plate, and a driven wheel is added to the outer center of the heat-insulating side plate and connected to the rotating seat. A limiting rotating rod is inserted into the center of the rotating seat and is rotatably connected to the hydraulic rod. The driven wheel drives the rotating seat to rotate on the heat-insulating side plate, while the rotating seat drives the limiting rotating rod to rotate in the same direction. At the same time, the hydraulic rod does not rotate with the limiting rotating rod, but drives the limiting rotating rod to move.

[0014] Preferably, the driven wheel is engaged with a driving wheel at its bottom, and a third drive motor is coaxially connected to the outer center of the driving wheel. The third drive motor drives the driving wheel, which in turn drives the driven wheel.

[0015] Preferably, an adjusting plate is vertically added to the center of the inner side of the heat-insulating side plate and connected to a limiting rotating rod, and a rotating head is added to the front of the adjusting plate. The limiting rotating rod drives the adjusting plate to move, and the rotating head rotates on the adjusting plate at the same time.

[0016] Preferably, the inner cavity of the adjusting plate is equipped with a bidirectional lead screw, which is coaxially connected to the rotating head. A second slider is fitted onto the front and rear ends of the bidirectional lead screw. A telescopic rod is installed on the inner front and rear ends and center of the adjusting plate, and is connected to the second slider. A return spring is installed in the inner cavity of the telescopic rod, and fits against the telescopic end of the telescopic rod. The telescopic end of the telescopic rod is connected to the clamping plate. The rotating head drives the bidirectional lead screw to rotate on the adjusting plate, while the second slider moves the connected telescopic rod and clamping plate in opposite directions according to the direction of the bidirectional lead screw, adjusting the distance between the two sets of clamping plates. The adjusting plate, through the telescopic rod, causes the clamping plates to fit against the mold. On the one hand, molds of different sizes can be fixed within a certain range; on the other hand, the return spring inside the telescopic rod avoids direct rigid restriction of the mold, preventing deformation during heat treatment.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides an air furnace for heat treatment of gear forging dies, which has the following beneficial effects:

[0019] This air furnace for heat treatment of gear forging dies uses hydraulic rods and clamping plates to fix the die within the furnace cavity. Electric heating elements are then energized to heat the die. After heat treatment, a second drive motor rotates a lead screw on the furnace body, causing the first slider to move and separate from the furnace body according to the lead screw's rotation. Once the lead screw, clamping plates, and die are moved outside the furnace, the hydraulic rod separates the clamping plates from the die. This allows for die removal without waiting for the die and clamping structure to cool down, facilitating the removal of the die from the air furnace and its descent onto a receiving device. This not only automates die removal but also allows the clamping structure to be moved outside the furnace, facilitating die fixation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the right side view of the furnace body and the heat insulation side plate of this utility model separated.

[0022] Figure 3 This is a schematic diagram of the thermal insulation side plate and its structure of the present invention;

[0023] Figure 4This is a cross-sectional view of the heat insulation side plate and adjustment plate of this utility model.

[0024] In the diagram: 1. Furnace body; 2. Door panel; 3. First drive motor; 4. Positioning hole; 5. Positioning groove; 6. Threaded screw; 7. Second drive motor; 8. Insulating side plate; 9. Positioning column; 10. Positioning block; 11. Rotary seat; 12. Driven wheel; 13. Drive wheel; 14. Third drive motor; 15. Limiting rod; 16. Hydraulic rod; 17. Adjusting plate; 18. Rotating head; 19. Bidirectional screw; 20. Telescopic rod; 21. Return spring; 22. Clamping plate; 23. Electric heating element. Detailed Implementation

[0025] 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.

[0026] This utility model provides a technical solution: an air furnace for heat treatment of gear forging dies, comprising: (see details) Figure 1 The furnace body 1 and the door panel 2 are provided on the front of the furnace body 1. Positioning holes 4 are provided on both sides of the back of the inner wall of the furnace body 1, and positioning grooves 5 are provided on the upper and lower parts of both sides of the inner wall of the furnace body 1. An electric heating tube 23 is provided at the bottom of the inner cavity of the furnace body 1.

[0027] Please see Figure 2 A threaded screw 6 is located at the upper and lower center of both sides of the furnace body 1, and a second drive motor 7 is coaxially connected to the rear end of the threaded screw 6, and a first slider is sleeved on the rear end of the threaded screw 6.

[0028] Please see Figure 3The heat-insulating side plates 8 are located at the center of both sides of the furnace body 1 and connected to the first slider. A hydraulic rod 16 is installed on the outer side of the furnace body 1, and a clamping plate 22 is added to the inner side of the furnace body 1. A positioning post 9 is installed on the back of the furnace body 1, corresponding to the positioning hole 4. Positioning blocks 10 are added to the top and bottom of the furnace body 1, corresponding to the positioning groove 5. After the mold is fixed in the inner cavity of the furnace body 1 by the hydraulic rod 16 and clamping plate 22, the electric heating tube 23 is energized to heat the mold. After heat treatment is completed, the second drive motor 7 drives the threaded screw 6 to rotate on the furnace body 1. The first slider, according to the rotation of the threaded screw 6, moves the heat-insulating side plates 8 and separates them from the furnace body 1. After the heat-insulating side plates 8 move the clamping plate 22 and the mold to the outside of the furnace body 1, the hydraulic rod 16 drives the clamping plate 22 to separate from the mold, causing the mold to fall onto the receiving equipment. On the one hand, the mold can be unloaded without waiting for the temperature of the mold and clamping structure to drop, making it easy to remove the mold from the air furnace; on the other hand, not only can the unloading of the mold be automated, but the clamping structure can also be moved to the outside of the furnace body 1, so as to make it easy to fix the mold on the clamping structure.

[0029] Please see Figure 2 A first drive motor 3 is installed on the outer side of the door panel 2, and a rotating shaft is coaxially connected to the first drive motor 3. The rotating shaft is connected to the top of the door panel 2. The first drive motor 3 drives the rotating shaft to rotate on the furnace body 1, so that the rotating shaft drives the door panel 2 to rotate in the same direction, which facilitates the adjustment and fixing of the door panel 2.

[0030] Please see Figure 4A rotating seat 11 is rotatably connected to the outer center of the heat insulation side plate 8, and a driven wheel 12 is added to the outer center of the heat insulation side plate 8 and connected to the rotating seat 11. A limiting rotating rod 15 is inserted into the center of the rotating seat 11 and is rotatably connected to the hydraulic rod 16. The driven wheel 12 drives the rotating seat 11 to rotate on the heat insulation side plate 8, and the rotating seat 11 drives the limiting rotating rod 15 to rotate in the same direction. At the same time, the hydraulic rod 16 does not rotate with the limiting rotating rod 15, but drives the limiting rotating rod 15 to move. A driving wheel 13 is meshed with the bottom of the driven wheel 12, and a third drive motor 14 is coaxially connected to the outer center of the driving wheel 13. The third drive motor 14 drives the driving wheel 13, and the driving wheel 13 drives the driven wheel 12. An adjusting plate 17 is vertically added to the inner center of the heat insulation side plate 8 and connected to the limiting rotating rod 15, and a rotating head 18 is added to the front of the adjusting plate 17. The limiting rod 15 drives the adjusting plate 17 to move, while the rotating head 18 rotates on the adjusting plate 17. A bidirectional lead screw 19 is installed inside the adjusting plate 17 and is coaxially connected to the rotating head 18. Second sliders are fitted onto the front and rear ends of the bidirectional lead screw 19. Telescopic rods 20 are installed on the inner front and rear ends and center of the adjusting plate 17 and are connected to the second sliders. A return spring 21 is installed inside the telescopic rod 20 and fits against its telescopic end. The telescopic end of the telescopic rod 20 is connected to the clamping plate 22. The rotating head 18 drives the bidirectional lead screw 19 to rotate on the adjusting plate 17, while the second slider moves in opposite directions according to the direction of the bidirectional lead screw 19, adjusting the distance between the two sets of clamping plates 22. The adjusting plate 17, through the telescopic rod 20, causes the clamping plates 22 to fit against the mold. On the one hand, it can fix molds of different sizes within a certain range; on the other hand, the return spring 21 inside the telescopic rod 20 can avoid direct rigid restriction of the mold, which would cause deformation during heat treatment.

[0031] This scheme: After the mold is fixed in the inner cavity of the furnace body 1 by the hydraulic rod 16 and the clamping plate 22, the electric heating tube 23 is energized to heat the mold. After heat treatment is completed, the second drive motor 7 drives the threaded screw 6 to rotate on the furnace body 1, while the first slider moves the heat insulation side plate 8 according to the direction of the threaded screw 6 and separates it from the furnace body 1. After the heat insulation side plate 8 moves the clamping plate 22 and the mold to the outside of the furnace body 1, the hydraulic rod 16 drives the clamping plate 22 to separate from the mold, so that the mold falls onto the receiving equipment. The first drive motor 3 drives the rotating shaft to rotate on the furnace body 1, so that the rotating shaft drives the door plate 2 to rotate in the same direction. The third drive motor 14 drives the drive wheel 13, which in turn drives the driven wheel 12. The driven wheel 12 drives the rotating seat 11 to rotate on the heat insulation side plate 8. The rotating seat 11 drives the limiting rotating rod 15 to rotate in the same direction. At the same time, the hydraulic rod 16 does not rotate with the limiting rotating rod 15, but drives the limiting rotating rod 15 to move. The limiting rotating rod 15 drives the adjusting plate 17 to move. The rotating head 18 drives the bidirectional lead screw 19 to rotate on the adjusting plate 17. The second slider drives the connected telescopic rod 20 and clamping plate 22 to move in opposite directions according to the direction of the bidirectional lead screw 19, adjusting the distance between the two sets of clamping plates 22. The adjusting plate 17 drives the clamping plate 22 to fit against the mold through the telescopic rod 20.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air furnace for heat treatment of gear forging dies, characterized in that, include: The furnace body (1) and the door panel (2) set on the front of the furnace body (1) are provided with positioning holes (4) on both sides of the inner wall of the furnace body (1), and positioning grooves (5) are provided on the upper and lower parts of both sides of the inner wall of the furnace body (1), and an electric heating tube (23) is added to the bottom of the inner cavity of the furnace body (1). A threaded screw (6) is set on the upper and lower parts of the center of both sides of the furnace body (1), and a second drive motor (7) is coaxially connected to the rear end of the threaded screw (6), and a first slider is sleeved on the rear end of the threaded screw (6). Insulating side plates (8) are set at the center of both sides of the furnace body (1) and connected to the first slider. A hydraulic rod (16) is installed on the outside of the furnace body (1) and a clamping plate (22) is added to the inside of the furnace body (1). A positioning column (9) is installed on the back of the furnace body (1) and corresponds to the positioning hole (4). A positioning block (10) is added to the top and bottom of the furnace body (1) and corresponds to the positioning groove (5).

2. The air furnace for heat treatment of gear forging dies according to claim 1, characterized in that: A first drive motor (3) is provided on the outer side of the door panel (2) and a rotating shaft is coaxially connected to the first drive motor (3), and the rotating shaft is connected to the top of the door panel (2).

3. The air furnace for heat treatment of gear forging dies according to claim 1, characterized in that: A rotating seat (11) is rotatably connected to the outer center of the heat insulation side plate (8), and a driven wheel (12) is added to the outer center of the heat insulation side plate (8) and connected to the rotating seat (11). A limiting rotating rod (15) is inserted into the center of the rotating seat (11) and is rotatably connected to the hydraulic rod (16).

4. An air furnace for heat treatment of gear forging dies according to claim 3, characterized in that: The driven wheel (12) is engaged with the driving wheel (13) at its bottom, and the outer center of the driving wheel (13) is coaxially connected to the third drive motor (14).

5. An air furnace for heat treatment of gear forging dies according to claim 3, characterized in that: An adjustment plate (17) is vertically added to the center of the inner side of the heat insulation side plate (8) and connected to the limiting rotating rod (15). A rotating head (18) is added to the front of the adjustment plate (17).

6. An air furnace for heat treatment of gear forging dies according to claim 5, characterized in that: The inner cavity of the adjusting plate (17) is provided with a bidirectional lead screw (19) and coaxially connected with the rotating head (18). The front and rear ends of the bidirectional lead screw (19) are fitted with second sliders. The front, rear ends and center of the inner side of the adjusting plate (17) are equipped with telescopic rods (20) and connected with the second sliders. The inner cavity of the telescopic rod (20) is provided with a return spring (21) and fits against the telescopic end of the telescopic rod (20). The telescopic end of the telescopic rod (20) is connected to the clamping plate (22).

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