Sintering device for powder metallurgy gear ring

Abstract

The invention relates to the technical field of metal sintering, in particular to a sintering device for a powder metallurgy gear ring. A conveying belt used for conveying powder pressure alloy gear rings is arranged on the conveying frame, a machining box is arranged on the conveying frame, a stearic acid area, a heating area, a dewaxing area, a sintering area, a rapid cooling area and a gas quenching area are sequentially arranged in the machining box, and the conveying belt conveys the gold gear rings to pass through the machining box; the stearic acid area is used for adding stearic acid to the gear ring, a heating element used for preliminarily heating the gear ring is arranged in the heating area, a heating element used for heating, burning and dewaxing is arranged in the dewaxing area, a heating element used for sintering the gear ring is arranged in the sintering area, and the rapid cooling area is used for introducing cooling gas to cool the gear ring. The gas quenching area is used for introducing quenching gas, and the temperature in the heating area is lower than that in the sintering area; circulating fans and gas distributors are arranged in the heating area and the sintering area, and the circulating fans are used for blowing towards the corresponding gas distributors. And the temperature uniformity is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal sintering, in particular to a sintering device for a powder metallurgy gear ring. Background Art

[0002] Sintering refers to the process of transforming powdered materials into dense bodies. It is a traditional process that people have used to produce ceramics, powder metallurgy, refractory materials, ultra-high temperature materials, etc. After the powder is formed, it is sintered to obtain a dense body. The dense body obtained by sintering is a polycrystalline material, and its microstructure is composed of crystals, glass and pores.

[0003] Powder metallurgy technology is widely used to manufacture high-performance, complex-shaped metal parts. Sintering is a key step in powder metallurgy, and its equipment performance directly affects the final quality of the product. At present, although the sintering devices on the market can achieve basic sintering functions, the temperature uniformity needs to be improved. Summary of the invention

[0004] In order to solve the problem that the sintering devices on the market under the existing technology can achieve basic sintering functions but need to be improved in temperature uniformity, the present application provides a sintering device for metallurgical gear rings, and the specific solution is as follows.

[0005] A sintering device for a powder metallurgy gear ring, comprising a conveyor frame, on which a conveyor belt for conveying powder to press a gear ring is arranged, the conveyor frame is provided with a processing box, in which a stearic acid zone, a heating zone, a dewaxing zone, a sintering zone, a rapid cooling zone, and a gas quenching zone are sequentially arranged, and the conveyor belt transports the gear ring through the processing box; The stearic acid zone is used to add stearic acid toward the gear ring, the heating zone is provided with a heating element for preliminary heating of the gear ring, the dewaxing zone is provided with a heating element for heating combustion dewaxing, the sintering zone is provided with a heating element for sintering the gear ring, the rapid cooling zone is used to pass cooling gas to cool the gear ring, the gas quenching zone is used to pass quenching gas, and the temperature in the heating zone is lower than the temperature in the sintering zone; The heating zone and the sintering zone are both provided with a circulation fan and a gas distributor, and the circulation fan is used for blowing air toward the corresponding gas distributor.

[0006] By adopting the above technical scheme, a processing box is set on the conveyor frame and the processing box is divided into multiple areas, and stearic acid can be added into the gear ring in the stearic acid area. Stearic acid can be used as a catalyst for sintering, thereby improving the efficiency of the sintering reaction and further improving the product quality. Subsequently, after preheating and dewaxing, the wax on the gear ring can be removed and the gear ring can have a certain temperature, which is convenient for subsequent heating. The gear ring then enters the sintering area to complete the final sintering. After sintering, it is cooled through the rapid cooling area to facilitate the transportation of the product and improve the safety during discharge. Circulating fans and gas distributors are arranged in the heating area and the sintering area, which can make the air in the heating area and the sintering area more circulated, improve the uniformity of the atmosphere, make the gear ring evenly heated, and improve the sintering quality.

[0007] Optionally, a plurality of temperature sensors are provided in the processing box, and the temperature sensors are used to detect the temperature at different positions of the heating box and adjust the heating elements.

[0008] By adopting the above technical solution, multiple temperature sensors are set in the processing box to detect the temperature in real time, so that the temperature in the processing box can be adjusted according to the required temperature, reducing the situation where the temperature does not meet the requirements and affects the sintering quality, thereby further improving product quality.

[0009] Optionally, the rapid cooling zone is provided with a gas nozzle, and the processing box is also provided with an air inlet pipe at a position corresponding to the rapid cooling zone, the air inlet pipe is connected to the gas nozzle, and the air inlet pipe is connected to a nitrogen purge pipe, a propanol pipe, and an ammonia decomposition pipe.

[0010] By adopting the above technical solution, a gas nozzle is set in the rapid cooling zone, and the introduction of ammonia and propanol in decomposition can quickly cool the gear ring, while nitrogen can be used to purge the gear ring to achieve rapid cooling, and preliminary gas quenching can also be performed to improve safety during unloading and transportation.

[0011] Optionally, the gas quenching zone is also provided with the same gas nozzle, and a nitrogen pipe is provided on the processing box corresponding to the gas quenching zone, and the nitrogen pipe is connected to the corresponding gas nozzle.

[0012] By adopting the above technical solution, a gas nozzle is set in the gas quenching area, and the gas nozzle can introduce nitrogen to gas quench the product, and the product is further cooled by inert gas, impurities in the air are removed, and the possibility of oxidation and decarburization is reduced.

[0013] Optionally, a nozzle rack is provided in the processing box corresponding to the gas nozzle, and the nozzle rack includes a plurality of nozzle rods, the nozzle rods are arranged in parallel along the vertical direction, and the gas nozzles are mounted on the nozzle rods and are independently controlled.

[0014] By adopting the above technical solution, a nozzle rack is set in the processing box to set up multiple layers of gas nozzles. Multiple layers of independently controlled nozzles can be set up to ensure that the gear ring is subjected to uniform and controllable gas action during rapid cooling and gas quenching, thereby improving cooling efficiency and quenching effect.

[0015] Optionally, the gas nozzle includes an ultrasonic atomizing nozzle.

[0016] By adopting the above technical solution, the ultrasonic atomizing nozzle can achieve finer droplet distribution during the gas quenching process, further improving the quenching quality.

[0017] Optionally, the heating element comprises an infrared radiation heater.

[0018] By adopting the above technical solution, the infrared radiation heater can further improve the heating efficiency and energy saving.

[0019] Optionally, the conveyor belt includes a mesh belt, an outer conveyor roller and an inner conveyor roller, the mesh belt is connected to the outer conveyor roller and the inner conveyor roller and moves along the outer conveyor roller and the inner conveyor roller, the outer conveyor roller is arranged at the lower side of the processing box, the outer conveyor roller is rotatably connected to the conveying frame, the inner conveyor roller is arranged inside the processing box, the inner conveyor roller is rotatably connected to the processing box, a cleaning bucket is arranged at the bottom of the conveying frame, the cleaning bucket is arranged along the length direction of the conveying frame, a plurality of shower pipes are arranged in the cleaning bucket, and the shower pipes are used to spray coolant toward the mesh belt.

[0020] By adopting the above technical solution, a mesh belt is used to transport the gear ring, the mesh belt is more breathable and ventilated, the gear ring can be heated more evenly, and the mesh belt can be transported to the outside after heating. At this time, the mesh belt can be flushed by a shower pipe to wash away the wax on the mesh belt, thereby reducing the impact of the wax on the product during the subsequent sintering process. When the overall processing is completed, the flushing intensity of the shower pipe can be increased to cool down the processing box and the conveyor belt, thereby reducing the processing box and the conveyor belt from being kept in a high temperature state for a long time and reducing the service life.

[0021] Optionally, it also includes a positioning rod, which is detachably connected to the mesh belt, and the conveyor frame is provided with a mounting frame at the end of the processing box, and a positioning plate is fixedly provided on the mounting frame, and the positioning plate is provided on the lower side of the mesh belt and on the upper side of the cleaning bucket, and a positioning groove is provided on the positioning plate, and the positioning groove corresponds to the position of the positioning rod, and the positioning rod can slide along the positioning groove, and a sensing cylinder is also provided on the lower side of the positioning plate, and the sensing cylinder is provided corresponding to the shape of the positioning rod, and a temperature sensing component is provided in the sensing cylinder, and the temperature sensing component is electrically connected to the shower pipe and starts the shower pipe when a temperature increase signal is received.

[0022] By adopting the above technical solution, a positioning rod detachably connected to the mesh belt is provided, which can move with the mesh belt and needs to be placed in front of the first batch of sintered gear rings. Then, the position of the mesh belt movement can be judged according to the positioning rod. When the first batch of sintered gear rings are transported out, the positioning rod can be blocked by the positioning plate and moves toward the induction cylinder under the dual effects of gravity and interference. At this time, the shower pipe can be driven to clean the mesh belt, thereby reducing the waste of water resources.

[0023] Optionally, a pushing cylinder is also provided on the mounting frame, and the pushing cylinder is electrically connected to the temperature sensing component. A blocking plate is fixedly provided on the piston rod of the pushing cylinder, and the pushing cylinder can drive the blocking plate to move upward to block the product.

[0024] By adopting the above technical solution, a pushing cylinder is arranged on the mounting frame. When the temperature sensing component detects that the temperature has not been lowered to a temperature that can be sent out, the blocking plate is lifted by pushing and the product is sent to other areas for natural cooling.

[0025] In summary, this application has at least the following beneficial effects: 1. The present application solves the problem that the sintering devices on the market under the prior art can achieve basic sintering functions, but the temperature uniformity needs to be improved. The present application sets a circulating fan and a gas distributor in the heating zone and the sintering zone of the processing box, so as to form a uniform atmosphere in the heating zone and the sintering zone in the processing box, so that the temperature distribution in the heating zone and the sintering zone is more uniform, thereby further improving the uniformity of sintering and improving product quality.

[0026] 2. The present application also configures the mesh belt to be able to be wound out from the outside and cleaned through a shower pipe, which can not only cool the mesh belt but also clean the wax on the mesh belt to facilitate subsequent sintering, thereby further improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of the first embodiment.

[0028] Figure 2 It is a cross-sectional view of the first embodiment.

[0029] Figure 3 It is a three-dimensional diagram of the second embodiment.

[0030] Figure 4 It is a cross-sectional view of the second embodiment.

[0031] Description of reference numerals: 1. Conveyor rack; 11. Conveyor belt; 2. Processing box; 21. Stearic acid zone; 22. Heating zone; 221. Heating fan; 222. Gas distributor; 223. Infrared radiation heater; 23. Dewaxing zone; 24. Sintering zone; 25. Rapid cooling zone; 251. Gas nozzle; 252. Nozzle rack; 253. Nozzle rod; 254. Ultrasonic atomizing nozzle; 255. Nitrogen purge tube; 256. Propanol tube; 257. Ammonia decomposition tube; 26. Gas quenching zone; 261. Nitrogen tube; 27. Temperature sensor; 3. Mesh belt; 31. External conveying roller; 32. Internal conveying roller; 4. Cleaning bucket; 41. Shower pipe; 5. Mounting frame; 51. Positioning plate; 511. Positioning groove; 512. Temperature sensing component; 52. Push cylinder; 521. Blocking plate; 53. Sensing tube; 54. Positioning rod. DETAILED DESCRIPTION

[0032] The present application is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0033] Embodiment 1 A sintering device for a powder metallurgy gear ring, such as Figure 1 and Figure 2 As shown, it includes a conveyor frame 1, on which a conveyor belt 11 for conveying powder pressed gear rings is arranged, and the conveyor frame 1 is provided with a processing box 2, in which a stearic acid zone 21, a heating zone 22, a dewaxing zone 23, a sintering zone 24, a rapid cooling zone 25, and a gas quenching zone 26 are sequentially arranged, and the conveyor belt 11 conveys the gear rings through the processing box 2. In specific implementation, the processing box 2 needs to be connected to an external device to keep it fixed, and the gear rings can be transported along the conveyor frame 1 to complete multiple steps, sintered and sent out.

[0034] like Figure 1 and Figure 2 As shown, the stearic acid zone 21 is used to add stearic acid toward the gear ring, the heating zone 22 is provided with a heating element for preliminary heating of the gear ring, the dewaxing zone 23 is provided with a heating element for heating combustion dewaxing, the sintering zone 24 is provided with a heating element for sintering the gear ring, the rapid cooling zone 25 is used to pass cooling gas to cool the gear ring, and the gas quenching zone 26 is used to pass quenching gas, and the temperature in the heating zone 22 is lower than the temperature in the sintering zone 24. In a specific implementation, the heating element includes an infrared radiation heater 223, which can improve heating efficiency and energy saving, wherein the temperature of the stearic acid zone 21 and the heating zone 22 is 680 degrees Celsius, the temperature of the dewaxing zone 23 is 1000 degrees Celsius, and the temperature of the sintering zone 24 is 1090 degrees Celsius.

[0035] like Figure 1 and Figure 2As shown, a circulating fan and a gas distributor 222 are provided in both the heating zone 22 and the sintering zone 24. The circulating fan is used to blow air toward the corresponding gas distributor 222. In specific implementation, the gas distributor 222 is a device that makes the gas introduced in the gas-solid fluidized bed evenly distributed over the entire cross section. In conjunction with the circulating fan, a relatively uniform atmosphere can be formed inside the heating zone 22 and the sintering zone 24, so that the gear ring is heated more evenly.

[0036] like Figure 1 and Figure 2 As shown, a plurality of temperature sensors 27 are provided in the processing box 2, and the temperature sensors 27 are used to detect the temperature at different positions of the heating box and adjust the heating element. In specific implementation, the stearic acid zone 21, the heating zone 22, the dewaxing zone 23, the sintering zone 24, the rapid cooling zone 25, and the gas quenching zone 26 are all provided with temperature sensors 27, which can monitor the temperature in the processing box 2 in real time, facilitate timely temperature adjustment, and thus reduce the situation where the temperature is different from the product requirements and cause product quality problems.

[0037] like Figure 1 and Figure 2 As shown, the rapid cooling zone 25 is provided with a gas nozzle 251, and the processing box 2 is also provided with an air inlet pipe at a position corresponding to the rapid cooling zone 25, the air inlet pipe is connected to the gas nozzle 251, and the air inlet pipe is connected with a nitrogen purge pipe 255, a propanol pipe 256, and an ammonia decomposition pipe 257. In specific implementation, propanol can directly cool the product, ammonia can absorb heat through reaction, and nitrogen as an inert gas can play the role of purge and gas quenching.

[0038] like Figure 1 and Figure 2 As shown, the gas quenching zone 26 is also provided with the same gas nozzle 251, and a nitrogen pipe 261 is provided on the processing box 2 corresponding to the gas quenching zone 26, and the nitrogen pipe 261 is connected to the corresponding gas nozzle 251. A nozzle rack 252 is provided in the processing box 2 corresponding to the gas nozzle 251, and the nozzle rack 252 includes a plurality of nozzle rods 253, and the nozzle rods 253 are arranged in parallel along the vertical direction. The gas nozzle 251 is installed on the nozzle rods 253 and is independently controlled. In specific implementation, the gas nozzle 251 is arranged in multiple layers, and each layer of nozzles can independently adjust the gas flow and direction to ensure that the gear ring is subjected to uniform and controllable gas action during rapid cooling and gas quenching, thereby improving the cooling efficiency and quenching effect. The gas nozzle 251 includes an ultrasonic atomizing nozzle 254, and the ultrasonic atomizing nozzle can achieve smaller droplet distribution, further improving the quenching quality.

[0039] Working principle: The steps of powder metallurgy are the same as those of the prior art, but circulating fans and gas distributors 222 are added to the heating zone 22 and the sintering zone 24, which can form a uniform atmosphere in the processing box 2 and improve the uniformity of heating of the gear ring. At the same time, multi-layer nozzles are set to cool the product, further improving the gas quenching effect and cooling effect.

[0040] Embodiment 2 like Figure 3 and Figure 4 As shown, the main difference between Example 2 and Example 1 is that the conveyor belt 11 of Example 2 includes a mesh belt 3, an outer conveying roller 31 and an inner conveying roller 32, the mesh belt 3 is connected to the outer conveying roller 31 and the inner conveying roller 32 and moves along the outer conveying roller 31 and the inner conveying roller 32, the outer conveying roller 31 is arranged on the lower side of the processing box 2, the outer conveying roller 31 is rotatably connected to the conveying frame 1, the inner conveying roller 32 is arranged inside the processing box 2, the inner conveying roller 32 is rotatably connected to the processing box 2, a cleaning bucket 4 is arranged at the bottom of the conveying frame 1, the cleaning bucket 4 is arranged along the length direction of the conveying frame 1, a plurality of shower pipes 41 are arranged in the cleaning bucket 4, the shower pipes 41 are equidistantly arranged along the length direction of the cleaning bucket 4, and the shower pipes 41 are used to spray cooling liquid toward the mesh belt 3. In specific implementation, when the mesh belt 3 is heated in the processing box 2, the wax removed by heating will be contaminated onto the mesh belt 3. Therefore, when the mesh belt 3 is sent out, the mesh belt 3 is promptly flushed with coolant, which can not only clean the contaminated wax, but also further play a cooling role. Since the mesh belt 3 has been rapidly cooled when it is sent out, it is not easy to be damaged due to excessive temperature difference.

[0041] like Figure 3 and Figure 4As shown, it also includes a positioning rod 54, which is detachably connected to the mesh belt 3. The conveyor frame 1 is provided with a mounting frame 5 at the end of the processing box 2. A positioning plate 51 is fixedly provided on the mounting frame 5. The positioning plate 51 is provided on the lower side of the mesh belt 3 and on the upper side of the cleaning bucket 4. A positioning groove 511 is provided on the positioning plate 51. The positioning groove 511 is arranged corresponding to the position of the positioning rod 54. The positioning rod 54 can slide along the positioning groove 511. A sensing cylinder 53 is also arranged on the lower side of the positioning plate 51. The sensing cylinder 53 is arranged corresponding to the shape of the positioning rod 54. A temperature sensing component 512 is arranged in the sensing cylinder 53. The temperature sensing component 512 is electrically connected to the shower pipe 41 and starts the shower pipe 41 when a temperature increase signal is received. During specific implementation, the positioning rod 54 is detachably connected to the mesh belt 3 by a snap-on connection and can move with the mesh belt 3. It needs to be placed in front of the first batch of sintered gear rings. Then the movement position of the mesh belt 3 can be determined based on the positioning rod 54. When the first batch of sintered gear rings are transported out, the positioning rod 54 can be blocked by the positioning plate 51 and moves toward the sensing tube 53 under the dual effects of gravity and interference. The temperature sensing component 512 in the sensing tube 53 detects that the temperature rises, and it can be determined that the sensing rod has fallen. At this time, the shower pipe 41 can be controlled to clean the mesh belt 3.

[0042] like Figure 3 and Figure 4 As shown, the mounting frame 5 is also provided with a push cylinder 52, which is electrically connected to the temperature sensing component 512, and a blocking plate 521 is fixedly provided on the piston rod of the push cylinder 52, and the push cylinder 52 can drive the blocking plate 521 to move vertically upward to block the product. In specific implementation, the push cylinder 52 can move toward the mesh belt 3 without interfering with the mesh belt 3. When it moves to the top, the gear ring at the mesh belt 3 can be blocked by the blocking plate 521 and move toward both sides. At this time, temporary platforms for natural heat dissipation are set on both sides, so that the first batch of gear rings can be naturally cooled, and the internal temperature can be adjusted at the same time, which is convenient for subsequent processing.

[0043] Working principle: The basic working principle is the same as that of the first embodiment, but the mesh belt 3 can be cleaned and cooled outside the processing box 2 and then sent back into the processing box 2. At the same time, the shower pipe 41 can be started for cooling and cleaning after the first batch of gear ring processing is completed.

[0044] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sintering device for a powder metallurgy gear ring, characterized in that: The invention comprises a conveyor frame (1), wherein a conveyor belt (11) for conveying powder pressed gear rings is arranged on the conveyor frame (1), and a processing box (2) is arranged on the conveyor frame (1), and a stearic acid zone (21), a heating zone (22), a dewaxing zone (23), a sintering zone (24), a rapid cooling zone (25), and a gas quenching zone (26) are arranged in sequence in the processing box (2), and the conveyor belt (11) transports the gear rings through the processing box (2); The stearic acid zone (21) is used to add stearic acid toward the gear ring, the heating zone (22) is provided with a heating element for preliminary heating of the gear ring, the dewaxing zone (23) is provided with a heating element for heating combustion dewaxing, the sintering zone (24) is provided with a heating element for sintering the gear ring, the rapid cooling zone (25) is used to introduce cooling gas to cool the gear ring, and the gas quenching zone (26) is used to introduce quenching gas, and the temperature in the heating zone (22) is lower than the temperature in the sintering zone (24); The heating zone (22) and the sintering zone (24) are both provided with a circulation fan and a gas distributor (222), and the circulation fan is used to blow air toward the corresponding gas distributor (222).

2. A powder metallurgy ring gear sintering device according to claim 1, characterized in that: A plurality of temperature sensors (27) are arranged in the processing box (2), and the temperature sensors (27) are used to detect the temperature at different positions of the heating box and adjust the heating elements.

3. The sintering device for a powder metallurgy ring gear according to claim 1, characterized in that: The rapid cooling zone (25) is provided with a gas nozzle (251), and the processing box (2) is also provided with an air inlet pipe at a position corresponding to the rapid cooling zone (25), the air inlet pipe is connected to the gas nozzle (251), and the air inlet pipe is connected to a nitrogen purge pipe (255), a propanol pipe (256), and an ammonia decomposition pipe (257).

4. A powder metallurgy ring gear sintering device according to claim 3, characterized in that: The gas quenching zone (26) is also provided with a similar gas nozzle (251), and a nitrogen pipe (261) is provided on the processing box (2) corresponding to the gas quenching zone (26), and the nitrogen pipe (261) is connected to the corresponding gas nozzle (251).

5. The sintering device for a powder metallurgy gear ring according to claim 4, characterized in that: A nozzle rack (252) is provided in the processing box (2) corresponding to the gas nozzle (251), and the nozzle rack (252) includes a plurality of nozzle rods (253). The nozzle rods (253) are arranged in parallel along a vertical direction, and the gas nozzle (251) is mounted on the nozzle rods (253) and is independently controlled.

6. A powder metallurgy ring gear sintering device according to claim 5, characterized in that: The gas nozzle (251) includes an ultrasonic atomizing nozzle (254).

7. The sintering device for a powder metallurgy ring gear according to claim 1, characterized in that: The heating element comprises an infrared radiation heater (223).

8. The sintering device for a powder metallurgy gear ring according to claim 1, characterized in that: The conveyor belt (11) comprises a mesh belt (3), an outer conveyor roller (31) and an inner conveyor roller (32); the mesh belt (3) is connected to the outer conveyor roller (31) and the inner conveyor roller (32) and moves along the outer conveyor roller (31) and the inner conveyor roller (32); the outer conveyor roller (31) is arranged at the lower side of the processing box (2); the outer conveyor roller (31) is rotatably connected to the conveyor frame (1); the inner conveyor roller (32) is arranged inside the processing box (2); the inner conveyor roller (32) is rotatably connected to the processing box (2); a cleaning bucket (4) is arranged at the bottom of the conveyor frame (1); the cleaning bucket (4) is arranged along the length direction of the conveyor frame (1); a plurality of shower pipes (41) are arranged in the cleaning bucket (4); the shower pipes (41) are used to spray cooling liquid toward the mesh belt (3).

9. The sintering device for a powder metallurgy gear ring according to claim 8, characterized in that: The invention also comprises a positioning rod (54), wherein the positioning rod (54) is detachably connected to the mesh belt (3), the conveying frame (1) is provided with a mounting frame (5) at the end of the processing box (2), a positioning plate (51) is fixedly provided on the mounting frame (5), the positioning plate (51) is provided on the lower side of the mesh belt (3) and on the upper side of the cleaning bucket (4), a positioning groove (511) is provided on the positioning plate (51), the positioning groove (511) is arranged corresponding to the position of the positioning rod (54), the positioning rod (54) can slide along the positioning groove (511), a sensing cylinder (53) is further arranged on the lower side of the positioning plate (51), the sensing cylinder (53) is arranged corresponding to the shape of the positioning rod (54), a temperature sensing component (512) is arranged in the sensing cylinder (53), the temperature sensing component (512) is electrically connected to the shower pipe (41), and the shower pipe (41) is activated when a temperature increase signal is received.

10. The sintering device for a powder metallurgy gear ring according to claim 9, characterized in that: The mounting frame (5) is also provided with a pushing cylinder (52), the pushing cylinder (52) is electrically connected to the temperature sensing component (512), a blocking plate (521) is fixedly provided on the piston rod of the pushing cylinder (52), and the pushing cylinder (52) can drive the blocking plate (521) to move upward to block the product.

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