Carburizing and quenching heat treatment equipment for gear

Abstract

The invention relates to the technical field of gear machining, in particular to gear carburizing and quenching heat treatment equipment which comprises a furnace body, a carburizing cavity is formed in the furnace body, a radiant tube used for heating the carburizing cavity is arranged in the carburizing cavity, a furnace opening is formed in the top of the furnace body, a supporting table is arranged at the bottom of the carburizing cavity, and a water outlet is formed in the supporting table. An isolation sleeve is arranged at the furnace opening in an up-down sliding mode, a first driving assembly is further arranged on the furnace body, a loading frame is installed in the isolation sleeve in a sliding mode, and the loading frame comprises a first partition plate, a connecting column, a second partition plate and an installing column; the isolation sleeve is matched with the supporting table and the first partition plate to form a closed quenching cavity in the carburizing cavity. The gear part is surrounded by the isolation sleeve to directly form the quenching cavity after carburizing is completed, so that the gear is directly quenched in the carburizing furnace, the transferring step of the high-temperature gear is reduced, and the situation that the gear falls off and hurts people in the transferring process is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of gear processing technology, specifically to a gear carburizing and quenching heat treatment equipment. Background Technology

[0002] Heat treatment refers to a metalworking process in which materials, in their solid state, are heated, held at temperature, and cooled to achieve the desired microstructure and properties. In gear manufacturing, surface carburizing is typically performed to improve the surface strength, fatigue strength, and corrosion resistance of gears. During gear surface carburizing, heat treatment is required to allow carbon to penetrate into the surface microstructure, resulting in a higher carbon content in the outer layer and thus improving the gear's performance.

[0003] The carburizing process for gears typically involves placing the gears inside a carburizing furnace for heating and carburizing. After carburizing, quenching is required to rapidly cool the gears and form a high-hardness carbide layer on the surface. Existing carburizing furnaces, such as pit-type carburizing furnaces, are vertical shafts that only have heating functions. Quenching requires lifting the gears from the top of the carburizing furnace and transferring them to a quenching tank. During the transfer of the gears to the quenching tank, the gears are extremely hot, and there is a risk of them falling and causing injury. Existing technologies also use sealed box furnaces combined with tempering furnaces and cleaning and unloading vehicles to form flexible production lines. Automating the production line for quenching gears after carburizing can, to some extent, prevent high-temperature gears from falling and causing injury. However, this assembly line method requires a large area and is suitable for large-scale gear production. For smaller manufacturers, it is costly, and the carburized layer on gears produced in sealed box furnaces is generally thinner than that produced in pit-type carburizing furnaces.

[0004] To address this issue, a carburizing and quenching heat treatment device for gears is proposed, which eliminates the transfer steps between devices during the carburizing and quenching of gears in a pit-type carburizing furnace, thus avoiding the possibility of high-temperature gears falling and causing injury. Summary of the Invention

[0005] The purpose of this invention is to provide a carburizing and quenching heat treatment device for gears. By setting a quenching chamber inside the pit-type carburizing furnace, the gears can be directly quenched inside the quenching chamber after carburizing, thereby solving the problem mentioned in the background art that gears are prone to falling and injuring people during the process of transferring them to the quenching pool after carburizing inside the pit-type carburizing furnace.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A gear carburizing and quenching heat treatment apparatus includes a furnace body with a carburizing chamber inside. A radiant tube for heating the carburizing chamber is installed inside the chamber. A circular furnace opening is located at the top of the furnace body. A supply assembly for providing dripping agent to the carburizing chamber is installed on the furnace body. A circulating fan for driving gas flow within the carburizing chamber is also installed on the furnace body. A support platform is located at the bottom of the carburizing chamber, and a drain outlet with a drain valve is installed at the drain outlet. An insulating sleeve, cylindrical in shape, is slidably mounted at the furnace opening, with an outer diameter equal to the furnace opening diameter. A first driving assembly is also installed on the furnace body for driving the insulating sleeve to slide vertically. The furnace is equipped with a loading frame, which includes a first partition, a connecting column, a second partition, and mounting columns. Both the first and second partitions are circular. The diameter of the first partition is the same as the inner diameter of the insulating sleeve. The connecting column is fixedly installed at the bottom of the first partition. The diameter of the second partition is smaller than that of the first partition. The second partition is fixedly installed at the end of the connecting column away from the first partition. There are multiple mounting columns, which are fixed to the second partition for loading gears. The first partition, in conjunction with the insulating sleeve, can completely seal the furnace opening. The furnace body is equipped with a second drive assembly for driving the loading frame to move up and down. The first partition is also equipped with a delivery pipe for supplying the liquid required for quenching, and a water supply valve is installed on the delivery pipe.

[0008] During gear carburizing, the insulating sleeve slides upwards and extends outside the carburizing chamber, while the loading frame carries the gear into the carburizing chamber. The first baffle, in conjunction with the wall thickness of the insulating sleeve, seals the furnace opening. The radiant tube provides radiant heating to the carburizing chamber, and the supply assembly provides the dripping agent to the carburizing chamber. The gear is heated and carburized inside the carburizing chamber. After the gear carburizing process is completed, the first drive assembly drives the insulating sleeve downwards. When the bottom of the insulating sleeve abuts and seals with the support platform, the insulating sleeve, together with the first baffle and the support platform, forms a closed quenching chamber inside the carburizing chamber. The gear on the loading frame is completely enclosed within the quenching chamber, while the radiant tube, supply assembly, circulating fan, and side walls of the carburizing chamber are isolated outside the quenching chamber by the insulating sleeve. Open the water supply valve of the delivery pipe to fill the quenching chamber from above with quenching liquid to quench the gear that has been carburized. After quenching, close the water supply valve and open the drain valve to discharge the quenching liquid inside the quenching chamber from the drain outlet. This will discharge the quenching liquid from the quenching chamber and the carburizing chamber, preventing the quenching liquid from contacting the side wall of the carburizing chamber and the radiant tube.

[0009] After the quenching liquid is drained, the drain valve is closed, and the second drive assembly drives the loading frame to move upward. When the loader extends outside the carburizing furnace, the worker can remove the carburized and quenched gear from the loading frame. Since the gear has already been quenched and cooled, there will be no risk of burns to the worker.

[0010] Furthermore, since the isolation sleeve isolates the radiation tube and the side wall of the carburizing chamber from the outside of the quenching chamber during gear quenching, it effectively prevents the temperature inside the carburizing chamber from dropping. After replacing the gears on the transfer rack, a new batch of gears can be placed back into the carburizing chamber for carburizing treatment, which helps to ensure the continuity of production.

[0011] It is worth noting that, from the moment the loading rack removes the carburized and quenched gears from inside the furnace until a new batch of gears is fully inserted into the furnace, the insulating sleeve always keeps the radiant tubes between the outside of the insulating sleeve and the inner wall of the furnace. This effectively prevents the high temperature inside the carburizing chamber from overflowing from the furnace opening, thus improving the working environment for workers and preventing them from being burned by the high temperature overflowing from the carburizing furnace when removing carburized and quenched gears or inserting a new batch of gears.

[0012] In addition, if tempering is required for the quenched gears, the loading rack can be lifted upwards by the first drive assembly instead of removing it from the furnace body after quenching, allowing the quenched gears to undergo tempering directly inside the carburizing chamber. This eliminates the need to move the gears and improves the ease of use of the equipment.

[0013] Preferably, a blocking ring is provided at the bottom of the insulating sleeve. The blocking ring is fixedly connected to the bottom of the insulating sleeve perpendicular to the side wall of the insulating sleeve, and the blocking ring is evenly distributed on the inner and outer sides of the insulating sleeve. Guide slopes are provided on both the inner and outer sides at the connection position between the insulating sleeve and the blocking ring. Inclined chamfers are provided at the outer edge of the lower side of the first partition and the lower side of the furnace opening, respectively, corresponding to the guide slopes on the inner and outer sides of the insulating sleeve.

[0014] During the carburizing process of the gear, the first drive assembly drives the isolation sleeve to extend upwards outside the carburizing chamber. At this time, the blocking ring abuts against the bottom surface of the furnace opening and the bottom surface of the first partition from the bottom of the first partition and the furnace opening, respectively. The blocking ring increases the contact area between the isolation sleeve and the furnace opening and the first partition, making it more difficult for the gas inside the carburizing chamber to flow out of the furnace body through the fit gap between the isolation sleeve and the furnace opening and the first partition. This helps to maintain pressure inside the carburizing chamber and ensure the effectiveness of the gear carburizing process.

[0015] The guide ramp and chamfered design further increase the contact area between the blocking ring and the bottom surface of the furnace opening and the bottom surface of the first baffle, helping to prevent gas leakage from the carburizing chamber. Moreover, the guide ramp acts as a guide, because the carburizing chamber is at a high temperature, and the gas pressure inside the chamber is higher than the external gas pressure during the carburizing process. This pressure pushes the blocking ring upwards, and under the guidance of the guide ramp, the blocking ring fits tightly against the gap between the insulating sleeve and the furnace opening and the first baffle, further improving the sealing effect of the carburizing chamber.

[0016] In addition, when the insulating sleeve moves downward and abuts against the support to form a quenching cavity, the blocking ring also increases the contact area between the insulating sleeve and the support, making it more difficult for the quenching liquid to flow out of the quenching cavity from the fit gap between the insulating sleeve and the support when quenching the gears inside the furnace.

[0017] Preferably, the support platform is provided with a convex ring, and the bottom of the blocking ring is provided with an annular groove that matches the convex ring. The convex ring and the annular groove can further increase the contact area between the blocking ring and the support platform, and make the fitting gap between the blocking ring and the support platform more meandering. This helps to prevent quenching liquid from flowing out of the quenching chamber from the fitting gap between the blocking ring and the support platform and into the carburizing chamber, affecting the temperature of the carburizing chamber, and further improving the stability of the equipment during use.

[0018] Preferably, the bottom of the first partition is vertically provided with a sliding groove, a sliding rod is slidably installed inside the sliding groove, a metal ball is fixedly installed at the bottom of the sliding rod, the metal ball is hollow inside, and a trigger button is provided at the top of the sliding groove, the trigger button is electrically connected to the drain valve.

[0019] The metal sphere detects the water level of the quenching fluid inside the quenching chamber. When the chamber is full, the fluid pushes the sphere up, triggering a sliding rod on top to press a button and activate the drain valve, allowing the quenching fluid to flow continuously from top to bottom. This metal sphere design ensures that all gears inside the quenching chamber are submerged in the quenching fluid, preventing gears located higher up from being unable to be fully immersed and ensuring optimal equipment performance.

[0020] Preferably, the insulating sleeve has a heat insulation cavity inside its side wall, and the heat insulation cavity is filled with aerogel. The aerogel has a heat insulation effect, and the combination of the heat insulation cavity and the aerogel reduces the heating of the quenching fluid by the carburizing cavity during gear quenching. This effectively prevents the quenching fluid from rapidly heating up due to the temperature inside the carburizing cavity after entering the quenching cavity, thus ensuring the quenching effect of the gear.

[0021] Preferably, the connecting column further comprises an upper half and a lower half, which are coaxially rotatably connected. The top of the upper half of the connecting column is fixedly connected to the bottom of the first partition, and the bottom of the lower half of the connecting column is fixedly connected to the top of the second partition. Multiple blades are fixedly installed on the lower half of the connecting column, each blade being inclined relative to the vertical direction. These multiple blades are evenly distributed and fixed to the lower half of the connecting column. The connecting column is divided into an upper half and a lower half, and is rotatably connected, allowing the second partition to drive the gear on it to rotate. When the quenching chamber is filled with quenching fluid, and the quenching fluid begins to flow out of the quenching chamber from the drain outlet, the quenching fluid flowing from top to bottom will wash over the blades of the connecting column and drive the connecting column to rotate. The gear can then rotate around the axis of the connecting column inside the quenching chamber. The rotating blades agitate the quenching fluid inside the quenching chamber, preventing localized overheating caused by the fluid remaining stagnant inside the chamber and failing to drain, which would negatively impact the quenching effect on the gears. This also prevents inconsistent temperatures within the quenching chamber, ensuring uniform performance in every gear produced.

[0022] When gears are carburized, the circulating fan inside the carburizing chamber disturbs the airflow inside the chamber, and the airflow can also drive the blades to rotate around the axis of the connecting column, which helps to improve the uniformity of gear carburizing.

[0023] Preferably, the second partition plate has multiple through holes, all of which penetrate both the upper and lower surfaces of the second partition plate. These through holes are evenly distributed circumferentially on the second partition plate with the connecting column axis as the reference. The through holes on the second partition plate help reduce the resistance of the quenching fluid as it flows downwards within the quenching chamber, thereby increasing the downward flow speed of the quenching fluid. This increased flow speed helps to better scour the blades, further increasing the rotational speed of the second partition plate and the lower half of the connecting column. This allows the gears on the mounting column to be cooled more evenly by the quenching fluid, further ensuring the quenching effect of each gear.

[0024] In addition, the through hole can reduce the residue of quenching liquid on the second partition, ensuring that the quenching liquid on the second partition can be discharged from the drain outlet to the outside of the carburizing chamber. This reduces the absorption and consumption of the temperature inside the carburizing chamber by the residual quenching liquid on the second partition when the isolation sleeve extends upward to the outside of the protective body, which helps to ensure the temperature stability inside the carburizing chamber.

[0025] Preferably, the connection between the conveying pipe and the first partition is aligned vertically with one of the blades, and the spacing between the blades is less than the diameter of the conveying pipe. This allows the conveying pipe to flush the blades and rotate the second partition as it delivers quenching fluid into the quenching chamber, and also ensures that the gears inside the quenching chamber are in uniform contact with the quenching fluid before the chamber is filled, further improving the uniformity of gear quenching.

[0026] Preferably, a flow meter is installed at the drain outlet, located below the drain valve, and electrically connected to the drain valve, trigger button, and first drive assembly. The flow meter detects whether the quenching fluid inside the quenching chamber has been completely discharged, ensuring that the first drive assembly can only drive the isolation sleeve upwards after the quenching fluid has been completely discharged. This prevents a large amount of quenching fluid from flowing from the quenching chamber into the carburizing chamber and affecting its temperature, thus ensuring the stability of equipment operation.

[0027] Preferably, the cross-section of the annular groove is an isosceles trapezoid, with the lower base length greater than the upper base length. The convex ring is made of metal and has a semi-circular cross-section, with a hollow deformation cavity inside. When the insulating sleeve moves downward, the annular groove squeezes the convex ring from top to bottom, with the lower part of the groove being larger than the upper part. This deformation of the convex ring ensures a tight fit between it and the annular groove, further improving the sealing of the quenching cavity and preventing the quenching liquid from seeping out of the cavity.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. The gear carburizing and quenching heat treatment equipment designed in this invention sets an isolation sleeve in the carburizing chamber of the pit-type carburizing furnace. After carburizing, the isolation sleeve surrounds the gear parts to directly form a quenching chamber, allowing the gear to be quenched directly inside the carburizing furnace. This eliminates the need for the high-temperature gear transfer step and effectively prevents the gear from falling and injuring people during the transfer process. In addition, the isolation sleeve can also prevent the high temperature of the carburizing furnace from overflowing and causing injury to workers when the gear is taken out of the carburizing furnace.

[0030] 2. The gear carburizing and quenching heat treatment equipment designed in this invention ensures the sealing of the carburizing chamber during the carburizing process by setting a blocking ring. It also sets a convex ring and annular groove to improve the sealing of the quenching chamber, preventing the quenching liquid inside the quenching chamber from seeping into the carburizing chamber and affecting the use of the carburizing chamber, thus ensuring the stability of the equipment during use.

[0031] 3. The gear carburizing and quenching heat treatment equipment designed in this invention also has multiple blades in the lower half of the connecting column. During the gear quenching process, the blades are driven to rotate by the flow of quenching liquid, so that the gear on the second partition can be quenched and cooled more evenly by the quenching liquid. In addition, the blades allow the gear to rotate when it is blown by the circulating fan during the carburizing process, so that the gear can also be carburized more evenly. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0033] Figure 2 This is a front view of the present invention;

[0034] Figure 3 This is a schematic diagram of the internal structure of the loading gear of the loading frame during carburizing treatment in this invention;

[0035] Figure 4 This is a schematic diagram of the internal structure of the quenching cavity formed inside the carburizing cavity according to the present invention;

[0036] Figure 5 This is a schematic diagram of the internal structure of the furnace when the loading rack is removed from the furnace body in this invention;

[0037] Figure 6 For the present invention Figure 4 Enlarged view of point A in the middle;

[0038] Figure 7 For the present invention Figure 4 Enlarged view of point B in the middle;

[0039] Figure 8 For the present invention Figure 4 Enlarged view of point C in the middle;

[0040] Figure 9 This is a three-dimensional view of the loading frame in this invention.

[0041] In the diagram: 1. Furnace body; 2. Carburizing chamber; 3. Radiant tube; 4. Furnace opening; 5. Support platform; 6. Drain outlet; 7. Drain valve; 8. Isolation sleeve; 9. First drive assembly; 10. Loading frame; 101. First partition plate; 102. Connecting column; 1021. Upper half; 1022. Lower half; 103. Second partition plate; 104. Mounting column; 11. Second drive assembly; 12. Quenching chamber; 13. Conveying pipe; 14. Water supply valve; 15. Blocking ring; 16. Guide ramp; 17. Inclined chamfer; 18. Convex ring; 19. Ring groove; 20. Slide groove; 21. Slide rod; 22. Metal sphere; 23. Trigger button; 24. Insulation chamber; 25. Aerogel; 26. Blade; 27. Through hole; 28. Flow meter; 29. ​​Deformation chamber; 30. Supply assembly; 31. Circulating fan. Detailed Implementation

[0042] Please see Figures 1 to 9 This invention provides a carburizing and quenching heat treatment device for gears, the technical solution of which is as follows:

[0043] A carburizing and quenching heat treatment device for gears, reference Figure 1 , Figure 2 and Figure 3 The furnace includes a furnace body 1, inside which is a carburizing chamber 2. A radiant tube 3 for heating the carburizing chamber 2 is installed inside the carburizing chamber 2. A circular furnace opening 4 is located at the top of the furnace body 1. A supply assembly 30 for providing dripping agent to the carburizing chamber 2 is installed on the furnace body 1. A circulating fan 31 for driving the gas flow inside the carburizing chamber 2 is also installed on the furnace body 1. The circulating fan 31 is located at the bottom of the carburizing chamber 2. A support platform 5 is located at the bottom of the carburizing chamber 2, and a drain outlet 6 is located on the support platform 5. A drain valve 7 is installed at the drain outlet 6, which is connected to a collection pool for collecting quenching liquid. An insulating sleeve 8 is slidably installed at the furnace opening 4. A heat insulation cavity 24 is located inside the side wall of the insulating sleeve 8, and the heat insulation cavity 24 is filled with aerogel 25. A first driving assembly 9 for driving the insulating sleeve 8 to slide up and down is also installed on the furnace body 1. In this embodiment, the first driving assembly 9 is an electric guide rail, and the slider of the electric guide rail is fixedly connected to the top of the insulating sleeve 8 with bolts. Of course, the first drive component 9 can also be replaced by other devices or mechanisms that can drive the object to move vertically up and down.

[0044] refer to Figures 3 to 5 as well as Figure 9A loading frame 10 is slidably installed inside the insulating sleeve 8. The loading frame 10 includes a first partition 101, a connecting column 102, a second partition 103, and a mounting column 104. The diameter of the second partition 103 is smaller than the diameter of the first partition 101. The connecting column 102 includes an upper half 1021 and a lower half 1022. The upper half 1021 and the lower half 1022 of the connecting column 102 are coaxially rotatably connected. The top of the upper half 1021 of the connecting column 102 is fixedly connected to the bottom of the first partition 101, and the top of the second partition 103 is fixedly connected to the lower half 1024 of the connecting column 102. At the bottom of 22, multiple blades 26 are fixedly installed on the lower half 1022 of the connecting column 102. Each blade 26 is inclined relative to the vertical direction, and the multiple blades 26 are evenly distributed and fixed on the lower half 1022 of the connecting column 102. The mounting column 104 is fixed on the second partition 103 for loading gears. The furnace body 1 is provided with a second drive assembly 11 for driving the loading frame 10 to move up and down. In this embodiment, the second drive assembly 11 is an electric cylinder, which is fixedly installed vertically downward on the frame at the top of the furnace body 1, and the output end of the electric cylinder is fixedly connected to the top of the first partition 101. In addition, the second drive assembly 11 can also be replaced by other devices or mechanisms that can drive objects to move vertically up and down. The first partition 101 is also equipped with a conveying pipe 13 for supplying the quenching liquid required for quenching to the quenching chamber 12. The conveying pipe 13 is connected to a storage tank for supplying quenching liquid. A water supply valve 14 is provided on the conveying pipe 13. The connection between the conveying pipe 13 and the first partition 101 is aligned vertically with one of the blades 26, and the spacing between the blades 26 is less than the diameter of the conveying pipe 13.

[0045] refer to Figure 4 as well as Figure 7 The first partition 101 has a vertically formed groove 20 at its bottom. A slide rod 21 is slidably installed inside the groove 20. A metal ball 22 is fixedly installed at the bottom of the slide rod 21. The metal ball 22 is hollow inside. A trigger button 23 is provided at the top of the groove 20. The trigger button 23 is electrically connected to the drain valve 7. A flow meter 28 is provided at the drain outlet 6. The flow meter 28 is located below the drain valve 7 and is electrically connected to the drain valve 7, the trigger button 23, and the first drive assembly 9.

[0046] refer to Figure 3 as well as Figure 9 The second partition 103 has multiple through holes 27, which all penetrate the upper and lower surfaces of the second partition 103. The multiple through holes 27 are evenly distributed on the second partition 103 with the axis of the connecting column 102 as the reference.

[0047] refer to Figures 4 to 5 as well as Figure 6 and Figure 8A blocking ring 15 is provided at the bottom of the insulating sleeve 8. The blocking ring 15 is fixedly connected to the bottom of the insulating sleeve 8 perpendicular to the side wall of the insulating sleeve 8. Guide ramps 16 are provided on both the inner and outer sides of the connection position between the insulating sleeve 8 and the blocking ring 15. Inclined chamfers 17 are provided on the outer edge of the lower side of the first partition plate 101 and the lower side of the furnace opening 4, respectively, corresponding to the guide ramps 16 on the inner and outer sides of the insulating sleeve 8. A convex ring 18 is provided on the support 5. The bottom of the blocking ring 15 is provided with an annular groove 19 that matches the convex ring 18. The cross-section of the annular groove 19 is an isosceles trapezoid, and the length of the lower base of the annular groove 19 is greater than the length of the upper base. The convex ring 18 is made of metal and has a semi-circular cross-section. A hollow deformation cavity 29 is provided inside the convex ring 18.

[0048] Initially, both the water supply valve 14 and the drain valve 7 are closed.

[0049] When using, refer to Figure 5 First, the first drive assembly 9 can be controlled to drive the insulating sleeve 8 into the carburizing chamber 2, causing the blocking ring 15 to abut against the support 5, thus sealing the radiant tube 3 between the furnace body 1 and the insulating sleeve 8. At this point, the radiant tube 3 can be activated first to preheat the space of the carburizing chamber 2 between the furnace body 1 and the insulating sleeve 8, thereby reducing the time required to subsequently heat the carburizing chamber 2. Because the insulating sleeve 8 isolates the radiant tube 3 within the sealed space between the furnace body 1 and the insulating sleeve 8, the temperature inside the furnace body 1 is difficult to dissipate from the furnace opening 4. At this point, the worker can fix the gear to the mounting column 104 of the loading frame 10.

[0050] After the gears are fixed, refer to Figure 3 as well as Figure 6The second drive assembly 11 is activated, extending the loading frame 10 vertically downwards from the furnace opening 4 into the insulating sleeve 8 and into the furnace body 1. The second drive assembly 11 is stopped when the top surface of the first partition 101 is flush with the top surface of the furnace body 1. Then, the first drive assembly 9 is controlled to move the insulating sleeve 8 upwards until the top surface of the blocking ring 15 at the lower end of the insulating sleeve 8 simultaneously contacts the top surface of the furnace body 1 and the bottom surface of the first partition 101. The first drive assembly 9 is then stopped. At this time, the guide ramp 16 also abuts against the inclined chamfer 17, exposing the gear on the loading frame 10 to the carburizing chamber 2, and the radiation tube 3 begins to heat the gear. The supply assembly 30 is then activated, dripping hydrocarbon organic liquids, such as kerosene, acetone, and ethanol, directly into the furnace, allowing the hydrocarbon organic liquids to decompose into carburizing components inside the carburizing chamber 2 to carburize the gear surface. Simultaneously, the circulating fan 31 is activated, agitating the gas inside the carburizing chamber 2, allowing the air containing carburizing components to make more thorough contact with the gear surface. When the circulating fan 31 disturbs the gas inside the carburizing chamber 2, the airflow will also wash the blades 26 on the connecting column 102, which will in turn drive the second partition 103 to rotate around the axis of the connecting column 102, which helps the carburizing of the gear to be more uniform.

[0051] After the gear carburizing process is completed, refer to Figure 4 The first drive assembly 9 drives the isolation sleeve 8 downward until the blocking ring 15 on the isolation sleeve 8 abuts against the upper surface of the support platform 5. At this time, the protruding ring 18 on the support platform 5 is engaged in the annular groove 19 on the blocking ring 15. As the annular groove 19 on the blocking ring 15 presses down on the protruding ring 18 on the support platform 5, the protruding ring 18 deforms towards the interior of the deformation cavity 29 and fits tightly against the side wall of the annular groove 19. At this time, the isolation sleeve 8, together with the support platform 5 and the first partition 101, forms a closed quenching cavity 12 inside the isolation sleeve 8.

[0052] Then refer to Figure 4 as well as Figure 7The water supply valve 14 is activated, and the quenching fluid required for gear quenching is supplied from top to bottom into the quenching chamber 12 through the delivery pipe 13 on the first partition 101. As the quenching fluid enters the quenching chamber 12 from top to bottom, it brushes against the blades 26 on the connecting column 102. The quenching fluid drives the second partition 103 to rotate around the axis of the connecting column 102, ensuring that each gear is cooled evenly by the quenching fluid at the beginning of quenching, thus guaranteeing the uniformity of quenching for each gear. As the quenching fluid gradually fills the quenching chamber 12, the water level inside the quenching chamber 12 continuously rises. When the water level inside the quenching chamber 12 rises to the metal sphere 22, the continued rise in water level will give the metal sphere 22 a buoyancy force, causing the slide rod 21 on the metal sphere 22 to move upward along the slide groove 20 until the top of the slide rod 21 contacts the trigger button 23. At this point, drain valve 7 opens, allowing quenching fluid to enter the quenching chamber 12 from the upper delivery pipe 13 while simultaneously draining it out of the quenching chamber 12 from the outlet, ensuring sufficient quenching and cooling of the gear. The diameter of drain outlet 6 must be the same as the inner diameter of delivery pipe 13 to maintain a relatively constant quenching fluid level inside the quenching chamber 12, ensuring sufficient quenching fluid for quenching and cooling of the gear.

[0053] Because the drain valve 7 is opened, the quenching liquid can be discharged and depressurized from the drain port 6. Since the diameter of the drain port 6 is the same as the inner diameter of the conveying pipe 13, the pressure inside the quenching chamber 12 can be kept stable. This effectively prevents the quenching liquid from overflowing from the gap between the blocking ring 15 and the support 5 into the carburizing chamber 2, causing the carburizing chamber 2 to lose temperature rapidly, as the pressure inside the quenching chamber 12 increases.

[0054] The drain valve 7, activated by the metal ball 22 at the top of the quenching chamber 12, ensures that all gears inside the quenching chamber 12 are submerged in the quenching liquid, preventing any gears from not being able to contact the quenching liquid.

[0055] As the quenching liquid continuously enters the quenching chamber 12 from the delivery pipe 13 and flows out of the quenching chamber 12 from the drain outlet 6 below, the flowing quenching liquid can also drive the blade 26 to rotate around the axis of the connecting column 102, thereby causing the gear on the mounting column 104 to also rotate around the axis of the connecting column 102, making the quenching of the gear more uniform.

[0056] After quenching is complete, refer to Figure 4 First, close the water supply valve 14 to stop filling the quenching chamber 12 with quenching liquid, and let the quenching liquid inside the quenching chamber 12 drain out from the drain outlet 6. When the flow meter 28 at the drain outlet 6 detects no flow, it means that the quenching liquid inside the quenching chamber 12 has been drained out. At this time, the drain valve 7 can be closed.

[0057] Subsequently, reference Figure 5The second drive assembly 11 is activated, causing the loading frame 10 to move upwards and extend outside the furnace body 1. Workers then remove the gear from the loading frame 10, obtaining the gear that has already undergone carburizing and quenching. This eliminates the need to transport the gear elsewhere for further quenching, preventing workers from being burned during the transfer of freshly carburized gears to the quenching tank.

[0058] In addition, refer to Figure 3 If tempering is required after quenching, the loading rack 10 can be left in place after quenching. Instead, the first drive assembly 9 can be controlled to extend the isolation sleeve 8 outside the furnace body 1, exposing the gears to the radiation tube 3 for tempering. After tempering, the isolation sleeve 8 can be re-inserted into the furnace body 1 to isolate the radiation tube 3. Then, the second drive assembly 11 can be controlled to remove the loading rack 10 from the furnace body 1, preventing workers from being burned by the high temperature inside the furnace body 1 at the furnace opening 4 and ensuring production safety.

[0059] Finally, if the gear needs to be rinsed and then tempered after quenching, a cleaning pipe can be connected to the top of the first partition 101 to supply cleaning fluid. After quenching, the gear can be cleaned with cleaning fluid and the cleaning fluid can be completely discharged from the quenching chamber 12. Then, the tempering process can be carried out directly inside the furnace body 1 according to the above operation.

[0060] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A gear carburizing and quenching heat treatment apparatus, comprising a furnace body (1), wherein a carburizing chamber (2) is provided inside the furnace body (1), a radiant tube (3) is provided inside the carburizing chamber (2), and a furnace opening (4) is provided at the top of the furnace body (1), characterized in that, The bottom of the carburizing chamber (2) is provided with a support platform (5), the support platform (5) is provided with a drain outlet (6), the drain outlet (6) is provided with a drain valve (7), the furnace opening (4) is provided with an isolation sleeve (8) that slides up and down, the furnace body (1) is also provided with a first drive assembly (9), the isolation sleeve (8) is slidably installed with a loading frame (10), the loading frame (10) includes a first partition (101), a connecting column (102), a second partition (103) and a mounting column (104), the connecting column (102) is installed at the bottom of the first partition (101), the second partition (103) is installed at the bottom of the second partition (104) and the connecting column (102) is installed at the bottom of the first partition (101). The mounting column (104) is fixedly installed on the end of the connecting column (102) away from the first partition (101). The mounting column (104) is fixed on the second partition (103) for loading gears. The furnace body (1) is provided with a second drive assembly (11). When the isolation sleeve is located in the carburizing chamber (2), the isolation sleeve (8) cooperates with the support platform (5) and the first partition (101) to form a closed quenching chamber (12) inside the carburizing chamber (2). The first partition (101) is also equipped with a conveying pipe (13) for supplying the quenching liquid required for quenching to the quenching chamber (12). The conveying pipe (13) is provided with a water supply valve (14).

2. The gear carburizing and quenching heat treatment equipment according to claim 1, characterized in that, The bottom of the insulating sleeve (8) is provided with a blocking ring (15). The blocking ring (15) is fixedly connected to the bottom of the insulating sleeve (8) perpendicular to the side wall of the insulating sleeve (8). Guide ramps (16) are provided on both the inner and outer sides of the connection position between the insulating sleeve (8) and the blocking ring (15). Inclined chamfers (17) are provided on the outer edge of the lower side of the first partition (101) and the lower side of the furnace opening (4) respectively corresponding to the guide ramps (16) on the inner and outer sides of the insulating sleeve (8).

3. The gear carburizing and quenching heat treatment equipment according to claim 2, characterized in that, The support platform (5) is provided with a protruding ring (18), and the bottom of the blocking ring (15) is provided with an annular groove (19) that matches the protruding ring (18).

4. The gear carburizing and quenching heat treatment equipment according to claim 1, characterized in that, The first partition (101) has a vertical groove (20) at the bottom. A slide rod (21) is slidably installed inside the groove (20). A metal ball (22) is fixedly installed at the bottom of the slide rod (21). The metal ball (22) is hollow inside. A trigger button (23) is provided at the top of the groove (20). The trigger button (23) is electrically connected to the drain valve (7).

5. The gear carburizing and quenching heat treatment equipment according to claim 1, characterized in that, The insulating sleeve (8) has a heat insulation cavity (24) inside its side wall, and the heat insulation cavity (24) is filled with aerogel (25).

6. The gear carburizing and quenching heat treatment equipment according to claim 1, characterized in that, The connecting column (102) includes an upper half (1021) and a lower half (1022). The upper half (1021) and the lower half (1022) of the connecting column (102) are coaxially rotatably connected. The top of the upper half (1021) of the connecting column (102) is fixedly connected to the bottom of the first partition (101), and the bottom of the lower half (1022) of the connecting column (102) is fixedly connected to the top of the second partition (103). A plurality of blades (26) are fixedly installed on the lower half (1022) of the connecting column (102). Each blade (26) is inclined relative to the vertical direction, and the plurality of blades (26) are evenly distributed and fixed on the lower half (1022) of the connecting column (102).

7. The gear carburizing and quenching heat treatment equipment according to claim 6, characterized in that, The second partition (103) has multiple through holes (27), all of which penetrate the upper and lower surfaces of the second partition (103). The multiple through holes (27) are evenly distributed on the second partition (103) with the axis of the connecting column (102) as the reference.

8. The gear carburizing and quenching heat treatment equipment according to claim 7, characterized in that, The connection between the conveying pipe (13) and the first partition (101) is aligned vertically with one of the blades (26), and the distance between the blades (26) is less than the diameter of the conveying pipe (13).

9. The gear carburizing and quenching heat treatment equipment according to claim 4, characterized in that, A flow meter (28) is provided at the drain outlet (6). The flow meter (28) is located below the drain valve (7), and the flow meter (28) is electrically connected to the drain valve (7), the trigger button (23), and the first drive assembly (9).

10. The gear carburizing and quenching heat treatment equipment according to claim 3, characterized in that, The cross-section of the annular groove (19) is an isosceles trapezoid, and the length of the lower base of the annular groove (19) with the isosceles trapezoidal cross-section is greater than the length of the upper base. The convex ring (18) is made of metal material, and the cross-section of the convex ring (18) is semi-circular. A hollow deformation cavity (29) is provided inside the convex ring (18).

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