Full-automatic tilting-type drum carbonitriding furnace

Abstract

The invention discloses a full-automatic tilting-type roller carbonitriding furnace, and particularly relates to the technical field of metal material heat treatment, the full-automatic tilting-type roller carbonitriding furnace comprises a processing table, the processing table is provided with a partition wall and a quenching tank, the quenching tank is filled with quenching oil or quenching liquid, the quenching tank is internally provided with a quenching roller mechanism, and the quenching roller mechanism is provided with a quenching roller. A co-permeation heating furnace is arranged at the top of one end of the quenching tank, and a feeding lifting mechanism is arranged between the bottom of the other end of the quenching tank and the partition wall. The roller design with the spiral blades is adopted in the co-permeation heating furnace and the quenching tank, so that the steel balls are in a dynamic rolling state in the heating co-permeation and quenching processes, soft spots generated by traditional static treatment are eliminated, the thickness of a permeation layer is uniform and consistent, the quenching structure is uniform, and the product quality is greatly improved; through the design of the tilting-type furnace body, a high-temperature workpiece can be directly and rapidly transferred into a quenching medium under the protective atmosphere, the workpiece is prevented from being exposed in air, oxidation and decarburization are prevented, and the smoothness and performance of the surface of the workpiece are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology for metallic materials, and more specifically, to a fully automatic tilting drum carbonitriding furnace. Background Technology

[0002] Carbonitriding is a chemical heat treatment process that simultaneously diffuses carbon and nitrogen atoms into the surface of steel. It is widely used in parts requiring high hardness, high wear resistance, and good fatigue strength, such as bearing steel balls. This process involves heating the workpiece in a carbon- and nitrogen-rich atmosphere at a suitable temperature (typically 820-880℃), causing active carbon and nitrogen atoms to be absorbed and diffused onto the workpiece surface, forming a hard diffusion layer.

[0003] Traditional steel ball carbonitriding equipment typically employs stationary or mesh belt furnaces. In stationary furnaces, the steel balls accumulate in the feed basket, remaining relatively stationary. This makes it difficult for the contact points between the balls to be exposed to the carburizing and nitriding atmosphere, resulting in extremely thin or even absent carburized layers in these contact areas, forming "soft spots" that severely affect the overall wear resistance uniformity and service life of the steel balls. Furthermore, the loading and unloading process is cumbersome, leading to low production efficiency and high labor intensity.

[0004] While mesh belt furnaces can achieve continuous production, their complex structure, large footprint, and high equipment investment make them uneconomical for steel ball production in relatively small batches. Furthermore, the mesh belt is prone to deformation and damage during prolonged operation at high temperatures, resulting in high maintenance costs. Although the steel balls on the mesh belt move to some extent, localized accumulation and relative stillness still occur, failing to completely resolve the issue of processing uniformity.

[0005] Existing rotary carburizing furnaces have a rotating drum inside the furnace body, which tumbles the workpieces. While this improves the uniformity of heating to some extent, it still has the following drawbacks: After only completing the carburizing (or carbonitriding) heating process, the subsequent quenching requires transferring the high-temperature workpiece to a separate quenching tank. This process not only increases the number of equipment and floor space, but also causes the workpiece to be exposed to the air during the transfer, resulting in surface oxidation and temperature runaway before quenching, which seriously affects the quenching quality and poses safety hazards. The processes of feeding, discharging, and quenching are not well connected, making it difficult to form a continuous and closed automated production line; The drum structure does not consider how to efficiently and securely connect with upstream and downstream equipment (such as automatic feeders and integrated quenching tanks). Workpieces are prone to spillage during loading and unloading, and opening the furnace opening will cause drastic fluctuations in the atmosphere and temperature inside the furnace.

[0006] Therefore, there is an urgent need in this field for a high-efficiency, energy-saving, and reliable carbonitriding equipment that can achieve full-process automation, ensure uniform steel ball processing, and seamlessly integrate heating and quenching. Summary of the Invention

[0007] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a fully automatic tilting drum carbonitriding furnace. The technical problem to be solved by the present invention is: how to build a complete automated production line from feeding, weighing, heating and co-infiltration, quenching to discharging, which can significantly improve production efficiency, reduce labor intensity, and ensure the stability and repeatability of the process.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a fully automatic tilting drum carbonitriding furnace, comprising a processing table, a partition wall and a quenching tank on the processing table, the quenching tank being filled with quenching oil or quenching liquid, a quenching drum mechanism being provided in the quenching tank, a carbonitriding heating furnace being provided at the top of one end of the quenching tank, and a feeding and lifting mechanism being provided between the bottom of the other end of the quenching tank and the partition wall; The quenching roller mechanism includes a furnace base I, a material storage roller on the top of the furnace base I, a cylindrical shell on the outside of the material storage roller, a transmission assembly I fixed on the top of the cylindrical shell, and a feeding hopper fixed on one end of the furnace base I; The furnace base I includes a base I, a support frame fixed between one end of the base I and the feeding hopper, and a rolling assembly I between the top of the base I and the accumulating drum. The bottom surface of the base I forms an angle α with the horizontal line, with the angle α set to 3°-5°, so that the accumulating drum is in an inclined state, which is conducive to the collection and discharge of steel balls after quenching. The accumulating drum of the quenching drum mechanism is always rotating slowly, and its internal spiral blades catch the falling high-temperature steel balls and make them continuously and evenly tumble and cool in the quenching oil. Since the quenching drum is inclined, the quenched steel balls move towards the lower end under the push of the spiral blades and are finally discharged through the feeding hopper to enter the next process. The material storage drum includes a main rotating drum, in which guide spiral blades are fixedly installed. Guide spiral blades are also fixedly installed on the inner wall of the main rotating drum. The material storage drum has guide spiral blades inside and a rolling ring and a steering gear on its outer wall. It is supported on the drag wheel of the furnace base I by the rolling ring and driven to rotate by the transmission assembly I (drive motor and drive gear). Its rotation direction and speed are adjustable to control the residence time and tumbling state of the steel balls in the quenching oil, ensuring uniform cooling. When the main rotating drum rotates, the spiral blades drive the steel balls inside to continuously tumble and move forward, ensuring that the surface of all steel balls can be evenly exposed to the atmosphere, achieving carbonitriding without dead angles.

[0009] In a preferred embodiment, the co-diffusion heating furnace includes a furnace base II. A steering bearing is provided between the bottom support of one end of the furnace base II and the processing table. A deflection assembly is provided between the outer wall of the other end of the furnace base II and the processing table. An inner furnace cylinder is provided at the top of the furnace base II. Guide spiral blades are fixedly installed in the inner cavity of the inner furnace cylinder. The inner furnace cylinder is made of heat-resistant steel (such as Cr). 25 Ni 20 A long cylindrical component made of Si2 is supported on the trolley of furnace base II by a rolling ring. A drive motor drives the inner cylinder of the furnace to rotate slowly through a reducer (the speed is adjustable, for example, 0.5-3 rpm). The inner cylinder is equipped with a furnace shell. A drive motor is fixed at one end of the furnace shell. One end of the bottom of furnace base II is connected to the processing table through a steering bearing, and the other end of the outer wall is connected to the processing table through a deflection assembly. The deflection assembly is preferably an electric push rod, which is controlled by a PLC to precisely drive the entire co-infiltration heating furnace to deflect at a certain angle around the axis of the steering bearing (for example, the furnace opening is tilted upward when feeding and downward when discharging). The furnace body of the co-infiltration heating furnace is in a horizontal or slightly tilted state. A quantitative amount of steel balls is poured into the feed port of the co-infiltration heating furnace. The inner cylinder rotates slowly, and the steel balls are tumbled, heated and completed by the driving of the spiral blades. By introducing atmospheric components such as nitrogen, methanol, propane and ammonia, the carbon potential and nitrogen potential in the furnace are maintained and precisely controlled.

[0010] In a preferred embodiment, the furnace base II includes a base II and a rolling assembly II; Both the rolling assembly I and the rolling assembly II include a driven shaft. Both ends of the driven shaft are provided with rotating bearing seats. A drag wheel is provided on one side of the rotating bearing seat. The drag wheel is fixedly connected to the driven shaft, and the rotating bearing seat is fixedly connected to the inner wall of the corresponding base II or base I.

[0011] In a preferred embodiment, the deflection assembly includes an electric push rod, one end of which is connected to the furnace base II and is provided with a bogie, and the other end of which is connected to the processing table and is provided with a bogie bearing seat. The electric push rod is provided with steering holes at both ends, and the electric push rod is rotatably connected to the bogie and the steering bearing seat respectively through the steering holes; After the co-infiltration process is completed, the deflection component operates, causing the furnace opening of the co-infiltration heating furnace to tilt downwards. At the same time, the inner cylinder of the furnace accelerates or reverses, using the spiral blades to quickly and thoroughly discharge the high-temperature steel balls that have completed co-infiltration from the furnace body. The high-temperature steel balls fall directly into the quenching roller mechanism in the quenching tank below through the feeding hopper.

[0012] In a preferred embodiment, the furnace shell includes a furnace shell with an externally fixed heat-insulating lining made of refractory ceramic fiber anchored to the furnace shell. This type of heating furnace is not only energy-efficient but also has a long service life and is easy to maintain. End plates are fixed at both ends of the furnace shell, and multiple heaters are fixed to the inner wall of the furnace shell. The heaters are made of OCr material. 27 The heater is made of Al7Mo2 resistance strip and is fixed to the corresponding position in the furnace shell with ceramic nails and gaskets to form a heating system, ensuring efficient heating and energy-saving heat preservation. It is also equipped with two thermocouples, one inside and one outside the furnace shell, to detect temperature changes online. The drive motor is fixedly connected to one end plate, and the output shaft of the drive motor passes through the end plate and is connected to the inner cylinder of the furnace; the end of the inner cylinder away from the drive motor is set as an opening, and the open end of the inner cylinder passes through the end plate.

[0013] In a preferred embodiment, both the furnace inner cylinder and the material storage drum include a main rotating cylinder, and rolling rings are fixedly provided on both outer walls of the main rotating cylinder, with the rolling rings aligned with the drag wheels. A steering gear is also fixedly provided on the outer wall of the main rotating drum corresponding to the material storage drum, and both ends of the main rotating drum corresponding to the material storage drum are provided with inlets; the transmission component I includes a drive motor and a drive gear fixedly provided on the output shaft of the drive motor. The drive motor is fixedly provided on the outer wall of the top of the cylinder shell, and a through groove is provided at the alignment of the cylinder shell and the drive gear. The drive gear meshes with the steering gear through the through groove for transmission.

[0014] In a preferred embodiment, the hopper is configured as a hollow "√" shape, the top opening of the hopper is aligned with the opening corresponding to the co-infiltration heating furnace, and the bottom opening of the hopper is aligned with the inclined high-end feed inlet corresponding to the material storage drum. The outer diameter of the guide spiral blade is approximately equal to the inner diameter of the main rotating drum.

[0015] In a preferred embodiment, the feeding and lifting mechanism includes a lifting main frame, a mounting frame I fixedly provided at the bottom of the lifting main frame, a mounting frame II fixedly provided at the top of the lifting main frame, the mounting frame I being fixed to the bottom wall of the quenching tank by bolts, and the mounting frame II being fixed to the partition wall by bolts; The lifting main frame includes a transmission belt, and a transmission assembly II is provided on the outer wall of the lifting main frame; the transmission assembly II includes a motor, sprocket, chain and guide roller, and the transmission assembly II provides power traction for lifting the transmission belt; multiple storage hoppers are evenly fixed on the transmission belt, and multiple drainage holes are opened on the storage hoppers; the feeding and lifting mechanism is used to lift the steel balls processed by the quenching drum mechanism from the quenching tank to a height above the table surface of the processing table, so as to facilitate the subsequent processes.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention employs a drum design with spiral blades in both the co-diffusion heating furnace and the quenching tank, so that the steel balls are in a dynamic rolling state during the heating co-diffusion and quenching process, which completely eliminates the soft spots caused by traditional static treatment, resulting in consistent diffusion layer thickness, uniform quenching structure, and significantly improved product quality. 2. This invention, through its tiltable furnace design, enables the direct and rapid transfer of high-temperature workpieces to the quenching medium under a protective atmosphere, completely avoiding exposure of the workpieces to air, preventing oxidation and decarburization, and ensuring the smoothness and performance of the workpiece surface. 3. This invention integrates the heating furnace and quenching tank onto a single processing table, resulting in a compact structure, small footprint, and fully automated process from loading to unloading, leading to high production efficiency, low labor intensity, and good process stability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the co-infiltration heating furnace structure of the present invention.

[0019] Figure 3 For the present invention Figure 2 Enlarged view of the structure of section A in the middle.

[0020] Figure 4 This is a schematic diagram of the co-infiltration heating furnace (partially cut out) of the present invention.

[0021] Figure 5 For the present invention Figure 4 Enlarged view of the structure of section B in the middle.

[0022] Figure 6 This is a schematic diagram of the fire drum mechanism of the present invention.

[0023] Figure 7 This is a schematic diagram of the fire drum mechanism (excluding the cylinder shell) of the present invention.

[0024] Figure 8 This is a schematic diagram of the cross-sectional structure of the material storage drum of the present invention.

[0025] Figure 9 This is a schematic diagram of the feeding and lifting mechanism of the present invention.

[0026] Figure 10 This is a schematic diagram of the cross-sectional structure of the furnace inner cylinder of the present invention.

[0027] The attached diagram is labeled as follows: 10 processing table, 20 partition wall, 30 quenching tank, 40 co-infiltration heating furnace, 50 quenching roller mechanism, and 60 feeding and lifting mechanism. 401 Furnace base II, 402 Steering bearing, 403 Deflection assembly, 404 Furnace inner cylinder, 405 Furnace outer shell, 406 Drive motor; 4011 Base II, 4012 Driven Shaft, 4013 Rotary Bearing Housing, 4014 Drag Roller; 4031 Electric push rod, 4032 Bogie, 4033 Steering bearing housing; 4051 Furnace shell, 4052 Thermal insulation lining, 4053 End plate, 4054 Heater; 501 Furnace base I, 502 Material storage drum, 503 Cylinder shell, 504 Transmission assembly I, 505 Feed hopper; 5011 Base I, 5012 Support Frame, 5013 Rolling Assembly I; 5021 Main rotating drum, 5022 Rolling ring, 5023 Steering gear, 5024 Feed inlet, 5025 Guide spiral blade; 601 Lifting main frame, 602 Mounting frame I, 603 Mounting frame II, 604 Transmission belt, 605 Transmission assembly II, 606 Material storage hopper. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] This invention provides, for example Figure 1 The fully automatic tilting drum carbonitriding furnace shown includes a processing table 10, a partition wall 20 and a quenching tank 30 on the processing table 10, a quenching drum mechanism 50 in the quenching tank 30, a carbonitriding heating furnace 40 at the top of one end of the quenching tank 30, and a feeding and lifting mechanism 60 between the bottom of the other end of the quenching tank 30 and the partition wall 20. like Figures 6-8 The quenching drum mechanism 50 includes a furnace base I 501, a material storage drum 502 on the top of the furnace base I 501, a shell 503 on the outside of the material storage drum 502, a transmission assembly I 504 fixed on the top of the shell 503, and a feeding hopper 505 fixed on one end of the furnace base I 501; the furnace base I 501 includes a base I 5011, a support frame 5012 fixed between one end of the base I 5011 and the feeding hopper 505, a rolling assembly I 5013 between the top of the base I 5011 and the material storage drum 502, and the bottom surface of the base I 5011 forms an angle α with the horizontal line, the angle α being set to 3°-5°; the material storage drum 502 includes a main rotating drum 5021, and a guide spiral blade 5025 fixed in the inner cavity of the main rotating drum 5021. A steering gear 5023 is fixedly installed on the outer wall of the main rotating drum 5021 corresponding to the material storage drum 502, and both ends of the main rotating drum 5021 corresponding to the material storage drum 502 are provided with inlet ports 5024; the transmission assembly I 504 includes a drive motor and a drive gear fixedly installed on the output shaft of the drive motor. The drive motor is fixedly installed on the outer wall of the top of the cylinder shell 503, and a through groove is provided at the alignment of the cylinder shell 503 and the drive gear. The drive gear meshes with the steering gear 5023 through the through groove; the feeding hopper 505 is set in a hollow “√” shape. The top opening of the feeding hopper 505 is aligned with the opening corresponding to the co-infiltration heating furnace 40, and the bottom opening of the feeding hopper 505 is aligned with the inclined high-end inlet port 5024 corresponding to the material storage drum 502; the outer diameter of the guide spiral blade 5025 is equivalent to the inner diameter of the main rotating drum 5021; The quenching drum mechanism 50 is completely immersed in the oil in the quenching tank 30. The bottom surface of the furnace base I 5011 is machined to form a 5° angle with the horizontal plane. The rolling component I 5013 (including the drag wheel 4014) on it supports the rolling ring 5022 of the storage drum 502. The structure of the storage drum 502 is similar to that of the inner cylinder 404, but the size is slightly smaller. The outer wall of its main rotating drum 5021 is also equipped with a steering gear 5023. The drive motor of the transmission component I 504 is fixed on the top of the cylinder shell 503. Its drive gear passes through the through groove on the cylinder shell 503 and meshes with the steering gear 5023, driving the storage drum 502 to rotate at a speed of 2-5 rpm. The feeding hopper 505 is designed in the shape of a "√". Its upper opening is aligned with the discharge port of the co-infiltration heating furnace 40, and its lower opening is aligned with the feeding port 5024 of the high end (inclined high end) of the storage drum 502. like Figures 2-5 and Figure 10 The co-infiltration heating furnace 40 includes a furnace base II 401. A steering bearing 402 is provided between the bottom support of one end of the furnace base II 401 and the processing table 10. A deflection assembly 403 is provided between the outer wall of the other end of the furnace base II 401 and the processing table 10. A furnace inner cylinder 404 is provided on the top of the furnace base II 401. A guide spiral blade 5025 is fixedly provided in the inner cavity of the furnace inner cylinder 404. A furnace outer shell 405 is provided outside the furnace inner cylinder 404. A drive motor 406 is fixedly provided at one end of the furnace outer shell 405. The co-infiltration heating furnace 40 is mounted on the furnace base II 401. The top of one end of the quenching tank 30 and the bottom of one end of the furnace base II 401 are connected to the processing table 10 through a large steering bearing 402, serving as a tilting fulcrum. The outer wall on the other side is hinged to a set of deflection components 403. The deflection components 403 adopt an electric push rod 4031 with a rated thrust of 2 tons. Its two ends are rotatably connected to the furnace base II 401 and the processing table 10 through a steering frame 4032 and a steering bearing seat 4033, respectively. The electric push rod 4031 is controlled by a PLC, and its stroke is precisely adjustable, which can realize the tilt angle change of the furnace body. The furnace inner cylinder 404 rests on the trolley 4014 via rolling rings 5022 firmly welded to both ends of its outer wall. The furnace inner cylinder 404 is made of 5mm thick Cr 25 Ni 20 It is made of Si2 heat-resistant steel plate rolled and welded, and its inner wall is welded with continuous guide spiral blades 5025. Furnace base II 401 includes base II 4011 and rolling assembly II; both rolling assembly I 5013 and rolling assembly II include driven shaft 4012, both ends of driven shaft 4012 are provided with rotating bearing seats 4013, one side of rotating bearing seat 4013 is provided with a drag wheel 4014, the drag wheel 4014 is fixedly connected to driven shaft 4012, and the rotating bearing seat 4013 is fixedly connected to the inner wall of the corresponding base II 4011 or base I 5011 respectively; The deflection assembly 403 includes an electric push rod 4031. One end of the electric push rod 4031 is connected to the furnace base II 401 and a bogie 4032 is provided at the connection point of the electric push rod 4031 and the other end of the electric push rod 4031 is connected to the processing table 10 and a steering bearing seat 4033 is provided at the connection point of the processing table 10. Both ends of the electric push rod 4031 are provided with steering holes, and the electric push rod 4031 is rotatably connected to the bogie 4032 and the steering bearing seat 4033 respectively through the steering holes. The furnace shell 405 includes a furnace shell 4051, and an insulating lining 4052 made of refractory ceramic fiber is fixedly installed on the outside of the furnace shell 4051. This type of heating furnace is not only energy-saving but also has a long service life and is easy to maintain. End plates 4053 are fixedly installed at both ends of the furnace shell 4051. Multiple heaters 4054 are fixedly installed on the inner wall of the furnace shell 4051. The heaters 4054 are made of OCr material. 27 The heater 4054 is made of Al7Mo2 resistance strip and is fixed to the furnace shell 4051 at the corresponding position with ceramic nails and gaskets to form a heating system. It is equipped with two thermocouples located inside and outside the furnace shell 4051 respectively to detect temperature changes online. The drive motor 406 is fixedly connected to one end plate 4053 and the output shaft of the drive motor 406 passes through the end plate 4053 and is connected to the furnace inner cylinder 404. The end of the furnace inner cylinder 404 away from the drive motor 406 is set as an opening and the open end of the furnace inner cylinder 404 passes through the end plate 4053. The furnace inner cylinder 404 and the material storage drum 502 both include a main rotating drum 5021. Rolling rings 5022 are fixed on both sides of the outer wall of the main rotating drum 5021 and are aligned with the drag wheel 4014. The furnace shell 405 consists of a furnace shell 4051, a refractory ceramic fiber insulation lining 4052, and end plates 4053 at both ends. The heater 4054 uses OCr. 27 A l7The Mo2 resistance strip is fixed to the corresponding position on the inner wall of the furnace shell 4051 by ceramic nails. The output shaft of the drive motor 406 and its matching reducer passes through the end plate 4053 and is connected to the inner cylinder 404 of the furnace, driving it to rotate at a speed of 0.8-1.5 rpm. The end of the inner cylinder 404 away from the motor is an opening for feeding and discharging materials. like Figure 9 The feeding and lifting mechanism 60 includes a lifting main frame 601. A mounting frame I 602 is fixedly installed at the bottom of the lifting main frame 601, and a mounting frame II 603 is fixedly installed at the top of the lifting main frame 601. The mounting frame I 602 is fixed to the bottom wall of the quenching tank 30 by bolts, and the mounting frame II 603 is fixed to the partition wall 20 by bolts. The lifting main frame 601 includes a transmission belt 604, and a transmission assembly II 605 is provided on the outer wall of the lifting main frame 601. The transmission assembly II 605 includes a motor, sprockets, chain, and guide rollers, and provides power traction for lifting the transmission belt 604. Multiple storage hoppers 606 are evenly fixed on the transmission belt 604, and multiple seepage holes are opened on the storage hoppers 606. The lifting main frame 601 is fixed to the bottom wall of the quenching tank 30 and the partition wall 20 respectively by mounting frame I 602 and mounting frame II 603. A storage hopper 606 with seepage holes is fixed at regular intervals on the transmission belt 604. The transmission component II 605 consists of a motor, chain and sprocket, which drives the transmission belt 604 to run in a step-by-step manner.

[0030] Specifically, the co-diffusion heating furnace 40 is heated to 850°C and a protective atmosphere is introduced, and steel balls are poured into the furnace inner cylinder 404 of the co-diffusion heating furnace 40; The inner cylinder of the furnace, made of 404, rotates at 1 rpm. The steel balls tumble and move forward under the drive of the spiral blades, and carbonitriding is carried out at 850℃ for 120 minutes. When co-infiltration ends, the PLC controls the electric push rod 4031 to retract, causing the furnace opening of the co-infiltration heating furnace 40 to tilt downward. At the same time, the rotation speed of the inner cylinder 404 increases to 3 rpm (or briefly reverses), and the spiral blades quickly sweep all the steel balls out within 30 seconds, which fall into the quenching drum mechanism 50 through the feeding hopper 505. The material storage drum 502 of the quenching drum mechanism 50 rotates at a speed of 3 rpm, catches the high-temperature steel ball and makes it tumble and cool violently in the quenching oil for about 15 minutes. After quenching, the storage drum 502 continues to rotate, discharging the cooled steel balls through the discharge port at its lower end and the feeding hopper 505, and then resetting the equipment to prepare for the next batch of processing. The continuous, slow rotation of the drum keeps the steel balls inside in a slow-moving state, avoiding uneven surface treatment caused by the steel balls being stationary during carbonitriding (when the steel balls are stationary, the contact surfaces of adjacent steel balls are not carbonitrided), thus completely avoiding the problem of uneven diffusion layers caused by static contact. The unique combination of a tilting furnace body design and an integrated quenching drum mechanism achieves seamless connection between the heating and quenching processes within a closed system, preventing workpiece oxidation during transport and improving product quality and production safety. This invention couples a "tilting furnace body," a "heating furnace inner drum," and an "integrated quenching drum." The tilting furnace body solves the global problem of rapid and thorough material discharge from drum-type heating furnaces. The integrated quenching drum takes over this discharge and continues the dynamic processing, together forming the technical foundation for achieving fully automated, high-quality heat treatment. From entering the furnace to the end of quenching, the steel balls are always mechanically driven to move within the drum, with seamless connections between each process, requiring no manual intervention. This results in high production efficiency, low labor intensity, and avoidance of human error. This continuous dynamic processing mode is fundamental to ensuring flawless uniformity, something that traditional equipment (whether static furnaces, mesh belt furnaces, or single drum furnaces) cannot achieve. It reconstructs the carbonitriding heat treatment process, integrating and compressing it from a production line completed by multiple independent and discrete devices into a single integrated equipment.

[0031] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fully automatic tilting drum carbonitriding furnace, comprising a processing table (10), wherein the processing table (10) is provided with a partition wall (20) and a quenching tank (30), characterized in that: The quenching tank (30) is equipped with a quenching roller mechanism (50), a co-infiltration heating furnace (40) is provided at the top of one end of the quenching tank (30), and a feeding and lifting mechanism (60) is provided between the bottom of the other end of the quenching tank (30) and the partition wall (20). The quenching roller mechanism (50) includes a furnace base I (501), a material storage roller (502) is provided on the top of the furnace base I (501), a cylindrical shell (503) is provided on the outside of the material storage roller (502), a transmission assembly I (504) is fixedly provided on the top of the cylindrical shell (503), and a feeding hopper (505) is fixedly provided at one end of the furnace base I (501). The furnace base I (501) includes a base I (5011), a support frame (5012) is fixed between one end of the base I (5011) and the feeding hopper (505), a rolling assembly I (5013) is provided between the top of the base I (5011) and the material storage roller (502), and the bottom surface of the base I (5011) forms an angle of inclination α with the horizontal line, and the angle α is set to 3°-5°; The material storage drum (502) includes a main rotating drum (5021), and a guide spiral blade (5025) is fixedly provided in the inner cavity of the main rotating drum (5021).

2. The fully automatic tilting drum carbonitriding furnace according to claim 1, characterized in that: The co-infiltration heating furnace (40) includes a furnace base II (401). A steering bearing (402) is provided between the bottom support of one end of the furnace base II (401) and the processing table (10). A deflection assembly (403) is provided between the outer wall of the other end of the furnace base II (401) and the processing table (10). A furnace inner cylinder (404) is provided at the top of the furnace base II (401). A guide spiral blade (5025) is fixedly provided in the inner cavity of the furnace inner cylinder (404). A furnace outer shell (405) is provided outside the furnace inner cylinder (404). A drive motor (406) is fixedly provided at one end of the furnace outer shell (405).

3. The fully automatic tilting drum carbonitriding furnace according to claim 2, characterized in that: The furnace base II (401) includes a base II (4011) and a rolling assembly II; Both the rolling assembly I (5013) and the rolling assembly II include a driven shaft (4012). Both ends of the driven shaft (4012) are provided with rotating bearing seats (4013). A drag wheel (4014) is provided on one side of the rotating bearing seat (4013). The drag wheel (4014) is fixedly connected to the driven shaft (4012), and the rotating bearing seat (4013) is fixedly connected to the inner wall of the corresponding base II (4011) or base I (5011).

4. The fully automatic tilting drum carbonitriding furnace according to claim 2, characterized in that: The deflection assembly (403) includes an electric push rod (4031), a bogie (4032) is provided at one end of the electric push rod (4031) where it is connected to the furnace base II (401), and a steering bearing seat (4033) is provided at the other end of the electric push rod (4031) where it is connected to the processing table (10). The electric push rod (4031) has steering holes at both ends, and the electric push rod (4031) is rotatably connected to the bogie (4032) and the steering bearing seat (4033) through the steering holes respectively.

5. A fully automatic tilting drum carbonitriding furnace according to claim 3, characterized in that: The furnace shell (405) includes a furnace shell (4051), an insulating lining (4052) is fixedly provided on the outside of the furnace shell (4051), end plates (4053) are fixedly provided at both ends of the furnace shell (4051), and multiple heaters (4054) are fixedly provided on the inner wall of the furnace shell (4051). The drive motor (406) is fixedly connected to one end plate (4053), and the output shaft of the drive motor (406) passes through the end plate (4053) and is connected to the furnace inner cylinder (404); the end of the furnace inner cylinder (404) away from the drive motor (406) is set as an opening, and the open end of the furnace inner cylinder (404) passes through the end plate (4053).

6. The fully automatic tilting drum carbonitriding furnace according to claim 5, characterized in that: The furnace inner cylinder (404) and the material storage drum (502) both include a main rotating drum (5021), and rolling rings (5022) are fixedly provided on both outer walls of the main rotating drum (5021), and the rolling rings (5022) are aligned with the drag wheel (4014); The storage drum (502) is also fixedly provided with a steering gear (5023) on the outer wall of the main rotating drum (5021) corresponding to the storage drum (502), and both ends of the main rotating drum (5021) corresponding to the storage drum (502) are provided with inlets (5024); the transmission assembly I (504) includes a drive motor and a drive gear fixedly provided on the output shaft of the drive motor. The drive motor is fixedly provided on the outer wall of the top of the cylinder shell (503), and a through groove is provided at the alignment of the cylinder shell (503) and the drive gear. The drive gear meshes with the steering gear (5023) through the through groove.

7. A fully automatic tilting drum carbonitriding furnace according to claim 6, characterized in that: The feeding hopper (505) is set in a hollow "√" shape. The top opening of the feeding hopper (505) is aligned with the opening of the co-infiltration heating furnace (40). The bottom opening of the feeding hopper (505) is aligned with the inclined high-end feed inlet (5024) of the storage roller (502). The outer diameter of the guide spiral blade (5025) is equivalent to the inner diameter of the main rotating drum (5021).

8. The fully automatic tilting drum carbonitriding furnace according to claim 1, characterized in that: The feeding and lifting mechanism (60) includes a lifting main frame (601), a mounting frame I (602) is fixedly provided at the bottom of the lifting main frame (601), a mounting frame II (603) is fixedly provided at the top of the lifting main frame (601), the mounting frame I (602) is fixed to the bottom wall of the quenching tank (30) by bolts, and the mounting frame II (603) is fixed to the partition wall (20) by bolts; The lifting main frame (601) includes a transmission belt (604), and a transmission assembly II (605) is provided on the outer wall of the lifting main frame (601); the transmission assembly II (605) includes a motor, a sprocket, a chain and a guide roller, and the transmission assembly II (605) provides power traction for lifting the transmission belt (604); a plurality of storage hoppers (606) are uniformly fixed on the transmission belt (604), and a plurality of seepage holes are opened on the storage hoppers (606).

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