A kind of inner gear ring soft nitriding residual stress elimination device

Abstract

The utility model relates to stress elimination technical field discloses a kind of inner tooth ring soft nitriding residual stress elimination device, including annealing box, the inside top of annealing box is provided with bearing frame, the inside of bearing frame is provided with temperature recovery mechanism, the temperature recovery mechanism is used to anneal inner tooth ring, the inside bottom of annealing box is provided with rotating mechanism, the rotating mechanism is used to rotate inner tooth ring, the right side of annealing box is provided with exhaust mechanism, the outside front side of annealing box is provided with opening and closing mechanism, the temperature recovery mechanism includes temperature recovery channel, the outside top of temperature recovery channel is fixedly connected in the inside of bearing frame. In the utility model, through temperature recovery channel top controllable fan and bottom electric heating block, heating wire cooperation, form up and down circulation heating airflow, eliminate internal and external temperature difference, avoid tooth and tooth root local heating shortage, improve heat conduction efficiency, shorten annealing time, give consideration to uniformity and high efficiency.

Description

Technical Field

[0001] This utility model relates to the field of stress relief technology, and in particular to a device for relieving residual stress after soft nitriding of an internal gear ring. Background Technology

[0002] The residual stress after soft nitriding of the internal gear ring refers to the stress generated on the surface layer after soft nitriding due to the infiltration of nitrogen and carbon atoms to form a hardened layer, which is asynchronous with the internal matrix due to the transformation of the structure and the expansion of the volume. During nitriding, the volume expansion of the surface layer is constrained by the matrix to generate compressive stress, which improves fatigue strength. If the process is improper, the stress distribution is uneven or too large, which will lead to deformation and cracking. The stress state directly affects the wear resistance, fatigue resistance and service life of the internal gear ring in automotive transmission equipment.

[0003] After the internal gear ring is soft nitrided, residual stress can cause the part to deform and crack, reducing fatigue strength and life. The residual stress relief device eliminates stress uniformly by optimizing the equipment structure and process, improving the dimensional accuracy and performance of the part, extending its service life, meeting the high precision and high reliability requirements of automotive parts, and promoting the advancement of automotive transmission equipment component manufacturing technology.

[0004] When tempering to eliminate residual stress from soft nitriding of the internal gear ring, traditional tempering equipment, due to the unilateral arrangement of heating elements, results in uneven heating of the inner and outer ring structure of the internal gear ring, a large temperature difference between the tooth and the tooth root, inconsistent stress elimination, and when parts are stacked, the inner layer is hindered from heating, requiring extended heat preservation time, which is inefficient and cannot accurately match the stress release requirements of complex structures, making it difficult to balance uniformity and high efficiency. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides a residual stress relief device after soft nitriding of an internal gear ring. It aims to improve the problem in the prior art where the tempering equipment has uneven heating inside and outside the annular structure of the internal gear ring due to the unilateral arrangement of the heating element, resulting in inconsistent stress relief, inability to accurately match the stress release requirements of complex structures, and difficulty in balancing uniformity and efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a device for relieving residual stress after soft nitriding of an internal gear ring, comprising a tempering box, a support frame provided on the top inner side of the tempering box, a reheating mechanism provided on the inner side of the support frame, the reheating mechanism being used to temper the internal gear ring, a rotating mechanism provided on the bottom inner side of the tempering box, the rotating mechanism being used to rotate the internal gear ring, an exhaust mechanism provided on the right side of the tempering box, and an opening and closing mechanism provided on the front outer side of the tempering box;

[0007] The reheating mechanism includes a reheating channel. The top outer side of the reheating channel is fixedly connected to the inner side of the support frame. A controllable fan is fixedly connected to the top inner side of the reheating channel. Multiple heating blocks are fixedly connected to the left and right sides of the bottom inner side of the reheating channel. Heating wires are fixedly connected between adjacent heating blocks. Metal support rods are fixedly connected to the four corners of the top of the support frame.

[0008] As a further description of the above technical solution:

[0009] The rotating mechanism includes a rotating motor, the top of which is fixedly connected to the bottom outer side of the tempering box. A rotating groove column is fixedly connected to the bottom inner side of the tempering box. A rotating block column is rotatably connected inside the rotating groove column. The output end of the rotating motor passes through the tempering box and the bottom of the rotating groove column and is fixedly connected to the bottom of the rotating block column. Multiple bearing plates are fixedly connected to the top of the rotating block column. Each of the multiple bearing plates has a bearing support rod fixedly connected to its top. Support components are respectively provided around the top of the multiple bearing plates.

[0010] As a further description of the above technical solution:

[0011] The support assembly includes multiple support rods, the bottoms of which are fixedly connected to the top periphery of multiple support plates, and each of the support rods has a limit block at its top.

[0012] As a further description of the above technical solution:

[0013] The exhaust mechanism includes an exhaust pipe, the left side of which is connected to the outside right side of the tempering box. A filter screen is provided on the lower middle part of the inner side of the exhaust pipe, activated carbon is fixedly connected to the upper middle part of the inner side of the exhaust pipe, and a protective component is provided on the top of the exhaust pipe.

[0014] As a further description of the above technical solution:

[0015] The protective assembly includes multiple stainless steel rods, the bottoms of which are fixedly connected to the top perimeter of the exhaust pipe, and the tops of which are fixedly connected to the same trapezoidal dome.

[0016] As a further description of the above technical solution:

[0017] A temperature sensor is fixedly connected to the inside left side of the tempering chamber, and a temperature control display is fixedly connected to the outside left side of the tempering chamber.

[0018] As a further description of the above technical solution:

[0019] The opening and closing mechanism includes two hinges. The rear sides of both hinges are fixedly connected to the front left end of the tempering box, and the right sides of both hinges are rotatably connected to a sealing plate door.

[0020] As a further description of the above technical solution:

[0021] A heat-resistant glass plate is fixedly connected to the top front side of the sealing panel door, and a heat-insulating handle is fixedly connected to the right front side of the sealing panel door.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, a controllable fan at the top of the reheat channel works in conjunction with a heating block and heating wire at the bottom to form an up-and-down circulating heating airflow. The fan forces convection to ensure that the hot air evenly covers the inner tooth ring structure. The heating block and heating wire provide multi-faceted heating to eliminate the temperature difference between the inside and outside, avoiding insufficient heating in certain areas of the teeth and tooth roots. The metal support structure ensures reasonable channel spacing, prevents stacked heat shielding, improves heat conduction efficiency, shortens tempering time, and balances uniformity and high efficiency.

[0024] 2. In this utility model, the rotating motor drives the rotating block column to rotate the bearing plate, so that the internal gear ring rotates once in the tempering box, breaking the temperature dead zone of traditional static heating. Combined with airflow circulation, it achieves uniform circumferential heating. The support component suspends the parts in the air, eliminating the contact heat shield between the bottom and the bearing surface, shortening the temperature difference balance time between the upper and lower surfaces, improving efficiency, and avoiding local stress residue caused by stacking. Attached Figure Description

[0025] Figure 1 This is a perspective view of a device for relieving residual stress after soft nitriding of an internal gear ring according to the present invention.

[0026] Figure 2 This is a front view of a device for relieving residual stress after soft nitriding of an internal gear ring according to the present invention.

[0027] Figure 3 This is a schematic diagram of the temperature sensor in a device for relieving residual stress after soft nitriding of an internal gear ring, as proposed in this utility model.

[0028] Figure 4 This is a structural exploded view of the reheating mechanism in a device for relieving residual stress after soft nitriding of an internal gear ring proposed in this utility model.

[0029] Figure 5 This is a structural exploded view of the rotating mechanism in the internal gear ring residual stress relief device after soft nitriding proposed in this utility model;

[0030] Figure 6This is a structurally exploded view of the exhaust mechanism in a device for relieving residual stress after soft nitriding of an internal gear ring, as proposed in this utility model.

[0031] Legend:

[0032] 1. Tempering chamber; 2. Support frame; 3. Reheating mechanism; 301. Reheating channel; 302. Controllable fan; 303. Heating wire; 304. Heating block; 305. Metal support rod; 4. Rotating mechanism; 401. Rotating motor; 402. Rotating groove column; 403. Rotating block column; 404. Support plate; 405. Supporting support rod; 406. Support assembly; 4061. Support rod; 4062. Limiting block; 5. Exhaust mechanism; 501. Exhaust pipe; 502. Filter screen; 503. Activated carbon; 504. Protective assembly; 5041. Stainless steel rod; 5042. Trapezoidal dome; 6. Temperature display controller; 7. Temperature sensor; 8. Opening and closing mechanism; 801. Hinge; 802. Sealing door; 9. Heat-resistant glass plate; 10. Insulated handle. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0034] Reference Figure 3 and Figure 4 An embodiment of this utility model provides a device for relieving residual stress after soft nitriding of an internal gear ring, comprising a tempering box 1, a support frame 2 provided on the top inner side of the tempering box 1, a reheating mechanism 3 provided on the inner side of the support frame 2, the reheating mechanism 3 being used to temper the internal gear ring, a rotating mechanism 4 provided on the bottom inner side of the tempering box 1, the rotating mechanism 4 being used to rotate the internal gear ring, an exhaust mechanism 5 provided on the right side of the tempering box 1 for discharging harmful gases, and an opening and closing mechanism 8 provided on the front outer side of the tempering box 1 for sealing the box and opening it at the end of tempering;

[0035] The reheating mechanism 3 includes a reheating channel 301. The top outer side of the reheating channel 301 is fixedly connected to the inner side of the support frame 2. A controllable fan 302 is fixedly connected to the top inner side of the reheating channel 301. Multiple heating blocks 304 are fixedly connected to the left and right sides of the bottom inner side of the reheating channel 301. Heating wires 303 are fixedly connected between adjacent heating blocks 304. Metal support rods 305 are fixedly connected to the four corners of the top of the support frame 2. Through the cooperation of the controllable fan 302 at the top of the reheating channel 301 with the heating blocks 304 and heating wires 303 at the bottom, an up-and-down circulating heating airflow is formed. The controllable fan 302 forces convection to make the hot air evenly cover the inner tooth ring structure. The heating blocks 304 and heating wires 303 heat from multiple sides to eliminate the temperature difference between the inside and outside, and avoid insufficient heating in the tooth and tooth root. The metal support rods 305 support the structure to ensure reasonable channel spacing and prevent stacking heat shielding.

[0036] Specifically, the reheating mechanism 3 solves the problem of uneven heating during the tempering of the internal gear ring. The top of the outer side of the reheating channel 301 is fixedly connected to the inner side of the support frame 2, forming a stable heating space structure. The controllable fan 302 on the top of the inner side can flexibly adjust the wind speed according to the tempering requirements to achieve directional flow and efficient circulation of hot air. When the internal gear ring is placed below the reheating channel 301, the controllable fan 302 forces the hot air to flow rapidly, breaking the phenomenon of hot air stagnation during traditional static heating, so that the hot air evenly wraps all parts of the annular structure of the internal gear ring, avoiding the occurrence of local low temperature areas.

[0037] Multiple heating blocks 304 and heating wires 303 arranged on the left and right sides of the bottom inner side of the reheat channel 301 form a multi-dimensional heat source matrix. The heating blocks 304 can generate high-intensity heat, and the heating wires 303 help to achieve uniform heat distribution and replenishment. The two work together to transfer heat from top to bottom, and the air driven by the top controllable fan 302 passes through and is guided, eliminating the temperature difference between the inner and outer layers of the inner gear ring. It can accurately act on every corner, avoid local insufficient heating caused by structural differences, and ensure that the entire inner gear ring receives a consistent heat input during the tempering process.

[0038] The metal support rods 305 at the four corners of the top of the support frame 2 not only stabilize the reheat channel 301, but also reasonably control the distance between the tempering box 1 and the reheat channel 301, prevent heat accumulation, and hinder heat transfer, thereby effectively improving the overall tempering efficiency and quality, allowing residual stress to be fully and evenly eliminated, and ensuring the stability and reliability of the internal gear ring performance.

[0039] Reference Figure 2 , Figure 3 and Figure 5The rotating mechanism 4 includes a rotating motor 401. The top of the rotating motor 401 is fixedly connected to the bottom of the outer side of the tempering box 1. A rotating groove column 402 is fixedly connected to the bottom of the inner side of the tempering box 1. A rotating block column 403 is rotatably connected inside the rotating groove column 402. The output end of the rotating motor 401 passes through the tempering box 1 and the bottom of the rotating groove column 402 and is fixedly connected to the bottom of the rotating block column 403. Multiple bearing plates 404 are fixedly connected to the top of the rotating block column 403. Each of the multiple bearing plates 404 is fixedly connected to a bearing support rod 405. The rotating motor 401 drives the rotating block column 403 to rotate the bearing plates 404, so that the internal gear ring rotates once inside the tempering box 1, breaking the temperature dead zone of traditional static heating. With the help of airflow circulation, uniform circumferential heating is achieved. Support components 406 are respectively provided around the top of the multiple bearing plates 404. The support components 406 suspend the parts and eliminate the contact heat shield between the bottom and the bearing surface, shortening the temperature difference balance time between the upper and lower surfaces.

[0040] Specifically, the rotating mechanism 4 effectively solves the problem of uneven heating during the tempering of the internal gear ring. The rotating motor 401 is fixed to the bottom of the outer side of the tempering box 1, and its output end passes through the box body and is stably connected to the rotating slot column 402 and the rotating block column 403, forming a reliable power transmission path. When the rotating motor 401 starts, the rotating block column 403 rotates smoothly in the rotating slot column 402, driving the multiple bearing plates 404 at the top to rotate synchronously, so that the internal gear ring placed on the bearing support rod 405 can achieve circumferential motion. This dynamic heating method breaks the limitations of traditional static tempering, allowing each part of the internal gear ring to pass through the high temperature area directly below the reheating channel 301 in sequence, eliminating the temperature dead angle caused by the fixed position. During the rotation, the contact between the surface of the internal gear ring and the hot air is more sufficient and uniform. Combined with the upper and lower circulating airflow formed by the reheating mechanism 3, it realizes all-round and multi-angle heat exchange, ensuring that the complex structural parts of the teeth and tooth roots can obtain a consistent heating effect.

[0041] The support component 406 adopts a special structure to suspend the internal gear ring, avoiding direct contact between the bottom of the part and the bearing plate 404, effectively eliminating the thermal shielding phenomenon caused by contact thermal resistance in traditional support methods.

[0042] Reference Figure 2 , Figure 5 and Figure 6The support assembly 406 includes multiple support rods 4061, the bottoms of which are fixedly connected to the top periphery of multiple support plates 404. Each of the multiple support rods 405 has a limit block 4062 at its top. The exhaust mechanism 5 includes an exhaust pipe 501, the left side of which is connected to the outside right side of the tempering box 1. A filter screen 502 is provided in the lower middle part of the inner side of the exhaust pipe 501. Activated carbon 503 is fixedly connected in the upper middle part of the inner side of the exhaust pipe 501. A protective assembly 504 is provided at the top of the exhaust pipe 501 for exhaust. The protective assembly 504 includes multiple stainless steel rods 5041, the bottoms of which are fixedly connected to the top periphery of the exhaust pipe 501. The tops of which are fixedly connected to the same trapezoidal dome 5042.

[0043] Specifically, the support component 406 and the exhaust mechanism 5 ensure the heating effect of the internal gear ring while taking into account environmental protection and equipment protection. Multiple support rods 4061 in the support component 406 are vertically fixed around the top of the bearing plate 404 in a matrix distribution to form a stable support frame. This distributed support structure can evenly distribute the weight of the internal gear ring and avoid deformation caused by excessive local stress. The limit block 4062 at the top precisely locks the internal gear ring to prevent displacement or tilting on the bearing support rod 405, ensuring that the internal gear ring remains stable during rotation. At the same time, it further improves the suspension effect, minimizes the bottom heat shield, and accelerates heat transfer.

[0044] The exhaust mechanism 5 emphasizes practicality and environmental protection. The exhaust pipe 501 runs through the right side of the tempering box 1, promptly discharging the oil fumes and volatile organic compounds generated during the tempering process. The internal filter 502 intercepts particulate impurities in the exhaust gas, preventing pipe blockage. The activated carbon 503, with its adsorption capacity, efficiently removes harmful gases and odors from the exhaust gas, reducing environmental pollution. The protective component 504 at the top of the exhaust pipe 501 uses multiple stainless steel rods 5041 to build a frame, with a trapezoidal dome 5042 at the top. On the one hand, it effectively prevents rainwater and debris from entering the exhaust pipe 501, preventing pipe corrosion and blockage. On the other hand, the design of the trapezoidal dome 5042 helps guide the airflow smoothly, reducing wind resistance and ensuring exhaust efficiency. The stainless steel material is corrosion-resistant and high-strength, adaptable to complex industrial environments, extending the service life of the exhaust equipment and ensuring the stable and environmentally friendly operation of the entire residual stress relief device.

[0045] Reference Figure 1 , Figure 2 and Figure 3A temperature sensor 7 is fixedly connected to the inside left side of the tempering chamber 1, and a temperature control display 6 is fixedly connected to the outside left side of the tempering chamber 1. The opening and closing mechanism 8 includes two hinges 801. The rear sides of the two hinges 801 are fixedly connected to the front left end of the tempering chamber 1. The right sides of the two hinges 801 are rotatably connected to a sealing plate door 802. A heat-resistant glass plate 9 is fixedly connected to the top front side of the sealing plate door 802. A heat-insulating handle 10 is fixedly connected to the front right end of the sealing plate door 802 for sealing the chamber and opening it when the tempering is finished.

[0046] Specifically, the internal left-side fixed temperature sensor 7 can monitor the temperature inside the chamber in real time and accurately transmit the data to the external left-side control temperature display 6. The operator can intuitively read the temperature value and adjust the heating parameters of the reheating mechanism 3 and the speed of the controllable fan 302 in a timely manner according to the requirements of the internal gear ring tempering process to ensure that the temperature inside the chamber is always maintained within the set range and to avoid over-tempering or under-tempering.

[0047] The opening and closing mechanism 8 is hinged to the front left end of the tempering chamber 1 via two hinges 801, enabling the flexible opening and closing of the sealing plate door 802. When closed, the sealing plate door 802 fits tightly against the tempering chamber 1, effectively preventing heat loss and harmful gas leakage, ensuring a stable tempering environment. When opened, it allows operators to quickly install and remove the internal gear ring, improving work efficiency. The heat-resistant glass plate 9 on the top front of the sealing plate door 802 allows operators to observe the tempering status of internal parts without opening the chamber, avoiding frequent opening and closing that could affect the temperature stability inside the chamber. The heat-insulating handle 10 on the front right end is made of heat-insulating material, effectively isolating high temperatures during tempering to prevent accidental burns to operators and ensure operational safety. It also facilitates effortless opening and closing, making the entire tempering operation process more convenient and safer.

[0048] Working principle: When in use, the operator pulls the sealing plate door 802 through the heat insulation handle 10 of the opening and closing mechanism 8, opens the tempering box 1 using the hinge 801, places the inner gear ring on the bearing support rod 405 of the rotating mechanism 4, and the supporting thin rod 4061 and the limiting block 4062 of the support component 406 work together to suspend and fix the inner gear ring and prevent it from shifting. After closing the sealing plate door 802, the device enters the working state.

[0049] The reheating mechanism 3 is activated first, and the electric heating block 304 and heating wire 303 at the bottom of the inner side of the reheating channel 301 start to heat up, constructing a multi-dimensional heat source matrix. The generated heat is evenly distributed in the tempering box 1. At the same time, the controllable fan 302 at the top of the reheating channel 301 starts to operate, driving the hot air to flow in a directional direction and forming a heating airflow that circulates up and down. Under the forced convection of the controllable fan 302, this hot air evenly covers the annular structure of the inner gear ring, avoiding local low temperature areas, effectively eliminating the temperature difference between the inner and outer layers of the inner gear ring, and ensuring that the complex structural parts of the teeth and tooth roots can receive consistent heat input.

[0050] The rotating mechanism 4 operates synchronously. The rotating motor 401 drives the rotating block column 403 to rotate in the rotating groove column 402, which drives the bearing plate 404 and the internal gear ring on the bearing support rod 405 to perform circumferential motion. During the rotation of the internal gear ring, each part passes through the high temperature area directly below the heat return channel 301 in sequence, breaking the temperature dead zone that exists in traditional static heating. Combined with the hot air circulation formed by the heat return mechanism 3, it realizes all-round and multi-angle heat exchange, making the internal gear ring more evenly heated.

[0051] During the tempering process, the temperature sensor 7 inside the tempering chamber 1 on the left side monitors the temperature inside the chamber in real time and transmits the data to the control temperature display 6 on the outside left side. The operator can intuitively understand the temperature situation through the control temperature display 6 and flexibly adjust the heating power of the electric heating block 304 and heating wire 303 in the tempering mechanism 3 and the speed of the controllable fan 302 according to the tempering process requirements of the internal gear ring, so as to ensure that the temperature inside the chamber is always maintained in a suitable range and avoid over-tempering or under-tempering.

[0052] The oil fumes and volatile organic compounds generated during the tempering process are discharged in time by the exhaust mechanism 5. When the exhaust gas is discharged through the exhaust pipe 501, the internal filter screen 502 first intercepts particulate impurities to prevent pipe blockage. Then, the activated carbon 503 plays an adsorption role to remove harmful gases and odors from the exhaust gas. The purified gas is then discharged through the protective component 504 at the top of the exhaust pipe 501. The stainless steel rod 5041 and trapezoidal dome 5042 of the protective component 504 can not only block rainwater and debris from entering the exhaust pipe 501 to prevent pipe corrosion and blockage, but also optimize the airflow direction, reduce wind resistance, and ensure exhaust efficiency.

[0053] After tempering is complete, the operator opens the sealing plate door 802 again through the opening and closing mechanism 8, and uses the heat-resistant glass plate 9 to observe the condition of the internal gear ring during tempering. After confirming that everything is correct, the part is taken out through the heat-insulating handle 10. Throughout the process, the various mechanisms work closely together, effectively solving the problem of uneven heating of the internal gear ring during tempering. At the same time, environmental protection and operational safety are taken into account, achieving efficient and uniform elimination of residual stress after soft nitriding of the internal gear ring, and ensuring the performance stability and reliability of the internal gear ring.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for relieving residual stress after soft nitriding of an internal gear ring, comprising a tempering chamber (1), characterized in that: The tempering box (1) has a support frame (2) on the top inner side, a reheating mechanism (3) on the inner side of the support frame (2), the reheating mechanism (3) is used to temper the internal gear ring, a rotating mechanism (4) is provided on the bottom inner side of the tempering box (1), the rotating mechanism (4) is used to rotate the internal gear ring, an exhaust mechanism (5) is provided on the right side of the tempering box (1), and an opening and closing mechanism (8) is provided on the front outer side of the tempering box (1). The reheating mechanism (3) includes a reheating channel (301), the top of the outer side of the reheating channel (301) is fixedly connected to the inner side of the support frame (2), a controllable fan (302) is fixedly connected to the top of the inner side of the reheating channel (301), a plurality of electric heating blocks (304) are fixedly connected to the left and right sides of the bottom of the inner side of the reheating channel (301), heating wires (303) are fixedly connected between adjacent electric heating blocks (304), and metal support rods (305) are fixedly connected to the four corners of the top of the support frame (2).

2. The residual stress relief device after soft nitriding of an internal gear ring according to claim 1, characterized in that: The rotating mechanism (4) includes a rotating motor (401). The top of the rotating motor (401) is fixedly connected to the bottom of the outer side of the tempering box (1). A rotating groove column (402) is fixedly connected to the bottom of the inner side of the tempering box (1). A rotating block column (403) is rotatably connected inside the rotating groove column (402). The output end of the rotating motor (401) passes through the tempering box (1) and the bottom of the rotating groove column (402) and is fixedly connected to the bottom of the rotating block column (403). A plurality of bearing plates (404) are fixedly connected to the top of the rotating block column (403). A bearing support rod (405) is fixedly connected to the top of each of the plurality of bearing plates (404). Support components (406) are respectively provided around the top of the plurality of bearing plates (404).

3. The residual stress relief device after soft nitriding of an internal gear ring according to claim 2, characterized in that: The support assembly (406) includes a plurality of support rods (4061), the bottoms of which are fixedly connected to the top periphery of a plurality of bearing plates (404), and the tops of the plurality of bearing supports (405) are provided with limit blocks (4062).

4. The residual stress relief device after soft nitriding of an internal gear ring according to claim 1, characterized in that: The exhaust mechanism (5) includes an exhaust pipe (501), the left side of which is connected to the outside right side of the tempering box (1), a filter screen (502) is provided on the lower inner side of the exhaust pipe (501), activated carbon (503) is fixedly connected to the upper inner side of the exhaust pipe (501), and a protective component (504) is provided on the top of the exhaust pipe (501).

5. The residual stress relief device after soft nitriding of an internal gear ring according to claim 4, characterized in that: The protective component (504) includes a plurality of stainless steel rods (5041), the bottoms of which are fixedly connected to the top of the exhaust pipe (501) around the perimeter, and the tops of which are fixedly connected to the same trapezoidal dome (5042).

6. The residual stress relief device after soft nitriding of an internal gear ring according to claim 1, characterized in that: A temperature sensor (7) is fixedly connected to the inside left side of the tempering chamber (1), and a temperature control display device (6) is fixedly connected to the outside left side of the tempering chamber (1).

7. The residual stress relief device after soft nitriding of an internal gear ring according to claim 1, characterized in that: The opening and closing mechanism (8) includes two hinges (801). The rear sides of the two hinges (801) are fixedly connected to the front left end of the tempering box (1), and the right sides of the two hinges (801) are rotatably connected to a sealing plate door (802).

8. The residual stress relief device after soft nitriding of an internal gear ring according to claim 7, characterized in that: A heat-resistant glass plate (9) is fixedly connected to the top front side of the sealing plate door (802), and a heat-insulating handle (10) is fixedly connected to the right front side of the sealing plate door (802).

Images