Die nitriding furnace

Abstract

The utility model discloses a die nitriding strengthening furnace belongs to die nitriding equipment technical field, it includes: outer furnace body, the inside of outer furnace body is provided with the inner bag, is established with the cavity between the inner bag and outer furnace body, the inside of inside is provided with the die, the top of outer furnace body is provided with the furnace cover, the bottom fixed mounting of furnace cover has the wind shelter, the inside of wind shelter is provided with heating assembly, avoids the nitriding effect difference caused by local temperature difference, accelerates heat transfer simultaneously, improves heating efficiency, shortens the time of die preheating and nitriding reaction, and circulates under the pump body effect flow, can according to the temperature change dynamic regulation heat dissipation efficiency in the inner bag, realizes the quick installation and disassembly of furnace cover and outer furnace body, and realizes double fixed, improves the sealing property and stability of furnace body, avoids the heat loss or gas leakage caused by furnace cover loosening in the nitriding process, guarantees the stability of reaction environment.

Description

Technical Field

[0001] This utility model relates to the field of mold nitriding equipment technology, and in particular to a mold nitriding strengthening furnace. Background Technology

[0002] In the mold manufacturing industry, nitriding is a key process for improving the surface hardness, wear resistance, corrosion resistance, and fatigue resistance of molds, and is widely used in the strengthening treatment of various high-precision molds such as cold-work molds and hot-work molds. However, traditional mold nitriding strengthening furnaces have many technical pain points in practical applications, making it difficult to meet the requirements of efficient and high-quality nitriding processes. Traditional nitriding furnaces mostly adopt static heating or a single heat source design, which easily leads to local differences in heat distribution within the furnace, resulting in uneven heating of different parts of the mold. This directly results in inconsistent nitriding layer depth and hardness in the mold, affecting mold performance and lifespan, especially for complex-shaped molds. The nitriding reaction requires extremely high temperature stability, but traditional equipment cooling systems are mostly passive heat dissipation or fixed-flow circulation, making it difficult to dynamically adjust heat dissipation efficiency based on real-time furnace temperature. This easily leads to excessively high or fluctuating temperatures, resulting in incomplete or excessive nitriding, reducing product yield. The sealing performance of the furnace lid and body directly affects the stability of the nitriding atmosphere. Traditional fixed structures (such as bolted connections) can ensure sealing, but the disassembly and assembly process is cumbersome, time-consuming, and labor-intensive, severely impacting furnace loading and unloading efficiency and hindering mass production. Meanwhile, some convenient opening and closing structures have poor sealing, easily leading to heat loss and gas leakage, damaging the reaction environment. Therefore, we propose a mold nitriding strengthening furnace to solve this problem. Utility Model Content

[0003] The purpose of this invention is to provide a mold nitriding strengthening furnace to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A mold nitriding strengthening furnace includes: an outer furnace body, an inner liner inside the outer furnace body, a cavity between the inner liner and the outer furnace body, a mold inside the inner liner, a furnace cover at the top of the outer furnace body, a fan hood fixedly installed at the bottom of the furnace cover, a heating assembly inside the fan hood, and the heating assembly including: two sets of fans and rotating shafts, a connecting shaft fixedly installed at the top of each of the two sets of fans, both of the connecting shafts rotatably extending through to the top of the furnace cover, and a fixed mounting on the top of each of the two sets of connecting shafts. There is a second set of bevel gears, and both sets of the second sets of bevel gears are rotatably mounted on the top of the furnace cover. Two sets of first sets of bevel gears are fixedly mounted on the outside of the rotating shaft. The first sets of bevel gears mesh with the corresponding second sets of bevel gears. Short pipes and water outlet pipes are fixedly mounted on both sides of the outer furnace body. The short pipes and water outlet pipes pass through the inner liner and the cavity, respectively. A connecting pipe and an installation pipe are respectively provided at one end of the short pipes and the water outlet pipes. An air inlet box and a water tank are fixedly mounted at one end of the connecting pipe and the installation pipe, respectively. A water inlet pipe is fixedly mounted on the top of the water tank.

[0005] Preferably, the top of the furnace cover has two sets of placement slots and sliding grooves inside. The placement slots and sliding grooves on the same side are each provided with a disassembly assembly. The disassembly assembly includes: a frame, a sliding plate that is slidably installed inside the frame, an insert plate and a pull rod that are fixedly installed at both ends of the sliding plate, a connecting plate that is fixedly installed at one end of the frame, a square plate that is fixedly installed on one side of the connecting plate, and an insert block that is fixedly installed on one side of the square plate. The insert block is movably inserted into the inside of the outer furnace body.

[0006] Preferably, the two sets of frames are slidably installed inside the corresponding placement slots, and each set of frames is provided with a spring. The two ends of the two sets of springs are fixedly connected to the corresponding slide plate and the top of the frame, respectively. The top of each set of pull rods is fixedly installed with a pull plate.

[0007] Preferably, the two sets of square plates are slidably installed inside the corresponding slide grooves, and each set of slide grooves is provided with a second spring. The two ends of the two sets of springs are fixedly connected to the inner wall of one side of the corresponding square plate and slide groove, respectively.

[0008] Preferably, two sets of short plates are fixedly installed on the top of the furnace cover, and the rotating shaft is rotatably installed inside the two sets of short plates. A motor is fixedly installed on one side of the short plate located on the front side, and the output shaft of the motor is fixedly connected to the rotating shaft. Heating plates are fixedly installed at the bottom of the two sets of fans, and the heating plates are fixedly installed on the inner walls of both sides of the fan cover.

[0009] Preferably, an air inlet pipe and an exhaust pipe are fixedly installed on one side of the outer furnace body, and both the air inlet pipe and the exhaust pipe penetrate into the interior of the outer furnace body. An air pump and a pump body are fixedly installed at one end of the short pipe and the water outlet pipe. One end of the air pump and the pump body are fixedly connected to a connecting pipe and an installation pipe, respectively. An air inlet pipe is fixedly installed on one side of the air inlet box, and a drain pipe is fixedly installed on the rear side of the outer furnace body.

[0010] In this utility model, a mold nitriding strengthening furnace is equipped with a heating component, a water tank, a water outlet pipe, and a pump. A motor drives a rotating shaft to rotate, which is driven by the meshing of bevel gear one and bevel gear two, driving two sets of connecting shafts and a fan to rotate. At the same time, the heating plate generates heat, and the fan blows the heat into the inner liner through the shroud. After absorbing the heat from the outer furnace body and the inner liner, the heat is circulated back to maintain a stable internal temperature. The forced circulation air supply design allows the heat to be evenly blown into the inner liner through the shroud, making the heating of each part of the mold in the inner liner more uniform, avoiding differences in nitriding effect caused by local temperature differences. It also accelerates heat transfer, improves heating efficiency, and shortens the preheating and nitriding reaction time of the mold. Furthermore, the circulating flow under the action of the pump can dynamically adjust the heat dissipation efficiency according to the temperature changes in the inner liner, effectively avoiding excessively high or fluctuating temperatures, ensuring that the nitriding reaction always takes place within the set optimal temperature range, which is beneficial to improving the quality stability of the nitrided layer of the mold. In this utility model, a mold nitriding strengthening furnace is equipped with a disassembly assembly, an air inlet box, an air pump, and connecting pipes. During the nitriding strengthening process, the pull plate is first pulled to move the pull rod and slide plate, compressing spring one to disengage the insert plate from its limit position, and spring two pushes the square plate and insert block to move. Then, the pull plate is released, and under the reset action of springs one and two, the insert plate is re-inserted into the furnace cover. The air inlet box introduces external gas through the air inlet pipe, which is then transported to the inner liner via the connecting pipe and short pipe (in conjunction with the air pump) to provide the required atmosphere for the nitriding reaction. This allows for rapid installation and disassembly of the furnace cover and outer furnace body, achieving double fixation, improving the furnace's sealing and stability, preventing heat loss or gas leakage due to a loose furnace cover during nitriding, ensuring the stability of the reaction environment, and ensuring that the forced airflow of the air pump can precisely control the gas flow rate and velocity, ensuring that the required nitriding atmosphere concentration is quickly formed and maintained within the inner liner, promoting a uniform and thorough nitriding reaction on the mold surface, and improving the quality of the nitrided layer. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of a mold nitriding strengthening furnace proposed in this utility model; Figure 2 This is a cross-sectional structural diagram of a mold nitriding strengthening furnace proposed in this utility model; Figure 3 This is a schematic diagram of the heating component structure proposed in this utility model; Figure 4 for Figure 2 A magnified view of part A in the middle.

[0012] In the diagram: 1. Outer furnace body; 2. Inner liner; 3. Furnace cover; 4. Heating assembly; 401. Rotating shaft; 402. Bevel gear one; 403. Bevel gear two; 404. Connecting shaft; 405. Fan; 5. Disassembly assembly; 501. Pull plate; 502. Frame; 503. Pull rod; 504. Slide plate; 505. Insert plate; 506. Connecting plate; 507. Square plate; 508. Insert block; 509. Spring one; 510. Spring two; 6. Wind hood; 7. Heating plate; 8. Mold; 9. Water tank; 10. Water outlet pipe; 11. Connecting pipe; 12. Air inlet box; 13. Air inlet pipe; 14. Exhaust pipe; 15. Pump body; 16. Water outlet pipe. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Reference Figure 1-4 A mold nitriding strengthening furnace includes: an outer furnace body 1, an inner liner 2 inside the outer furnace body 1, a cavity between the inner liner 2 and the outer furnace body 1, a mold inside the inner liner 2, a furnace cover 3 at the top of the outer furnace body 1, a fan hood 6 fixedly installed at the bottom of the furnace cover 3, a heating assembly 4 inside the fan hood 6, the heating assembly 4 including: two sets of fans 405 and a rotating shaft 401, a connecting shaft 404 fixedly installed at the top of each of the two sets of fans 405, both connecting shafts 404 rotatably extending through to the top of the furnace cover 3, and a bevel gear 4 fixedly installed at the top of each of the two connecting shafts 404. 03. Two sets of bevel gears 403 are rotatably mounted on the top of the furnace cover 3. Two sets of bevel gears 402 are fixedly mounted on the outside of the rotating shaft 401. The two sets of bevel gears 402 mesh with the corresponding bevel gears 403. Short pipes and water outlet pipes 10 are fixedly mounted on both sides of the outer furnace body 1. The short pipes and water outlet pipes 10 pass through the inner liner 2 and the cavity, respectively. A connecting pipe 11 and an installation pipe are respectively provided at one end of the short pipes and the water outlet pipes 10. An air inlet box 12 and a water tank 9 are fixedly mounted at one end of the connecting pipe 11 and the installation pipe, respectively. A water inlet pipe 16 is fixedly mounted on the top of the water tank 9.

[0015] In this embodiment, the top of the furnace cover 3 has two sets of placement slots and sliding grooves. Both the placement slots and sliding grooves on the same side are equipped with disassembly components 5. The disassembly components 5 include: a frame 502; a sliding plate 504 is slidably installed inside the frame 502; an insert plate 505 and a pull rod 503 are fixedly installed at both ends of the sliding plate 504; a connecting plate 506 is fixedly installed at one end of the frame 502; a square plate 507 is fixedly installed on one side of the connecting plate 506; and an insert block 5 is fixedly installed on one side of the square plate 507. 08. The insert block 508 is movably inserted into the inside of the outer furnace body 1 to facilitate the quick installation and removal of the furnace cover 3. The two sets of frames 502 are slidably installed in the corresponding placement slots. The inside of each set of frames 502 is provided with a spring 509. The two ends of the two sets of springs 509 are fixedly connected to the corresponding sliding plate 504 and the top of the frame 502 respectively. The top of each set of pull rods 503 is fixedly installed with a pull plate 501 to facilitate the quick reset of the insert plate 505 and to facilitate the double fixation of the furnace cover 3.

[0016] In this embodiment, two sets of square plates 507 are slidably installed inside corresponding slide grooves. Springs 510 are installed inside both slide grooves. The two ends of each spring 510 are fixedly connected to the corresponding square plate 507 and one side inner wall of the slide groove, facilitating the repositioning of the insert block 508 and the quick installation and removal of the furnace cover 3. Two sets of short plates are fixedly installed on the top of the furnace cover 3. A rotating shaft 401 is rotatably installed inside the two sets of short plates. A motor is fixedly installed on one side of the front short plate, and the motor's output shaft is fixedly connected to the rotating shaft 401. The bottom of the two sets of fans 405... A heating plate 7 is fixedly installed on both sides of the inner wall of the hood 6 to facilitate heating of the gas inside the inner liner 2. An air inlet pipe 13 and an exhaust pipe 14 are fixedly installed on one side of the outer furnace body 1. Both the air inlet pipe 13 and the exhaust pipe 14 extend into the interior of the outer furnace body 1. An air pump and a pump body 15 are fixedly installed at one end of the short pipe and the water outlet pipe 10. One end of the air pump and the pump body 15 are fixedly connected to the connecting pipe 11 and the installation pipe, respectively. An air inlet pipe is fixedly installed on one side of the air inlet box 12. A drain pipe is fixedly installed on the rear side of the outer furnace body 1 to facilitate stable operation of the device.

[0017] In this embodiment, during the nitriding strengthening treatment of mold 8, the pull plate 501 is first pulled to move the pull rod 503 and the slide plate 504, compressing the first spring 509 to disengage the insert plate 505 from its limit position, and the second spring 510 pushes the square plate 507 and the insert block 508 to move. Then, the pull plate 501 is released, and under the reset action of the first spring 509 and the second spring 510, the insert plate 505 is re-inserted into the interior of the furnace cover 3, and the insert block 508 is re-inserted into the interior of the outer furnace body 1. This facilitates the installation and double fixation of the furnace cover 3 and the outer furnace body 1. When the equipment is running, the motor drives the rotating shaft 401 to rotate. The rotating shaft 401 drives the two sets of connecting shafts 404 and the fan 405 to rotate through the meshing transmission of the first bevel gear 402 and the second bevel gear 403. At the same time, the heating plate 7 generates heat, and the fan 405 dissipates the heat. Heat is blown into the inner liner 2 through the fan hood 6, heating the mold 8 placed inside. The air inlet box 12 introduces external gas through the air inlet pipe, which is then transported to the inner liner 2 via the connecting pipe 11 and a short pipe (in conjunction with the air pump), providing the necessary atmosphere for the nitriding reaction. Gases generated during the reaction are discharged through the exhaust pipe 14. The cavity serves a cooling function; coolant in the water tank 9 is replenished through the water inlet pipe 16. Under the action of the pump 15, the coolant enters the cavity through the mounting pipe and the water outlet pipe 10, absorbing heat from the outer furnace body 1 and the inner liner 2 before circulating back to maintain a stable internal temperature. The reaction gas required for nitriding is introduced into the outer furnace body 1 through the air inlet pipe 13, ensuring a suitable nitriding environment is formed inside the inner liner 2. Through the synergistic effect of heating, atmosphere control, and temperature regulation, the nitriding strengthening treatment of the mold 8 is achieved. After treatment, the mold 8 can be removed by reversing the operation to disassemble component 5 and open the furnace cover 3.

[0018] The above provides a detailed description of a mold nitriding strengthening furnace provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A mold nitriding strengthening furnace, characterized in that, include: An outer furnace body (1) is provided with an inner liner (2) inside the outer furnace body (1). A cavity is provided between the inner liner (2) and the outer furnace body (1). A mold (8) is provided inside the inner liner. A furnace cover (3) is provided at the top of the outer furnace body (1). A wind hood (6) is fixedly installed at the bottom of the furnace cover (3). A heating assembly (4) is provided inside the wind hood (6). The heating assembly (4) includes: two sets of fans (405) and a rotating shaft (401). A connecting shaft (404) is fixedly installed at the top of each of the two sets of fans (405). Both sets of connecting shafts (404) rotate through to the top of the furnace cover (3). A bevel gear (4) is fixedly installed at the top of each of the two sets of connecting shafts (404). 03), both sets of bevel gears (403) are rotatably mounted on the top of the furnace cover (3). Two sets of bevel gears (402) are fixedly mounted on the outside of the rotating shaft (401). The two sets of bevel gears (402) mesh with the corresponding bevel gears (403). Short pipes and water outlet pipes (10) are fixedly mounted on both sides of the outer furnace body (1). The short pipes and water outlet pipes (10) pass through the inner liner (2) and the cavity, respectively. A connecting pipe (11) and an installation pipe are respectively provided at one end of the short pipe and the water outlet pipe (10). An air inlet box (12) and a water tank (9) are fixedly mounted at one end of the connecting pipe (11) and the installation pipe, respectively. A water inlet pipe (16) is fixedly mounted on the top of the water tank (9).

2. The mold nitriding strengthening furnace according to claim 1, characterized in that, The top of the furnace cover (3) has two sets of placement slots and sliding slots. The placement slots and sliding slots on the same side are equipped with disassembly components (5). The disassembly components (5) include: a frame (502), a sliding plate (504) is slidably installed inside the frame (502), and a plug plate (505) and a pull rod (503) are fixedly installed at both ends of the sliding plate (504). A connecting plate (506) is fixedly installed at one end of the frame (502), a square plate (507) is fixedly installed on one side of the connecting plate (506), and a plug block (508) is fixedly installed on one side of the square plate (507). The plug block (508) is movably inserted into the interior of the outer furnace body (1).

3. The mold nitriding strengthening furnace according to claim 2, characterized in that, The two sets of frames (502) are slidably installed inside the corresponding placement slots. A spring (509) is provided inside the two sets of frames (502). The two ends of the springs (509) are fixedly connected to the corresponding slide plate (504) and the top of the frame (502) respectively. A pull plate (501) is fixedly installed at the top of the two sets of pull rods (503).

4. A mold nitriding strengthening furnace according to claim 2, characterized in that, The two sets of square plates (507) are slidably installed inside the corresponding slide grooves. The two sets of slide grooves are each provided with a second spring (510). The two ends of the two sets of second springs (510) are fixedly connected to the inner wall of one side of the corresponding square plate (507) and the slide groove, respectively.

5. A mold nitriding strengthening furnace according to claim 1, characterized in that, Two sets of short plates are fixedly installed on the top of the furnace cover (3). The rotating shaft (401) is rotatably installed inside the two sets of short plates. A motor is fixedly installed on one side of the short plate located on the front side. The output shaft of the motor is fixedly connected to the rotating shaft (401). A heating plate (7) is fixedly installed at the bottom of the two sets of fans (405). The heating plate (7) is fixedly installed on the inner walls of both sides of the fan cover (6).

6. A mold nitriding strengthening furnace according to claim 1, characterized in that, An air inlet pipe (13) and an exhaust pipe (14) are fixedly installed on one side of the outer furnace body (1). The air inlet pipe (13) and the exhaust pipe (14) both penetrate into the interior of the outer furnace body (1). An air pump and a pump body (15) are fixedly installed at one end of the short pipe and the water outlet pipe (10). One end of the air pump and the pump body (15) are fixedly connected to the connecting pipe (11) and the installation pipe, respectively. An air inlet pipe is fixedly installed on one side of the air inlet box (12). A drain pipe is fixedly installed on the rear side of the outer furnace body (1).

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