A gear heat treatment system and process

Abstract

The application relates to the technical field of gear heat treatment, and discloses a gear heat treatment system and a treatment process. The gear heat treatment system comprises a preheating box, a carburizing box, a fixed ring, a driving source, a quenching box and a hanger. The fixed ring penetrates through the preheating box and the carburizing box, both end faces of the fixed ring in the axial direction are fixedly provided with sealing plates, the fixed ring is provided with a first communication part and a second communication part, the driving source drives the fixed ring to rotate at a fixed angle, four baffle plates are uniformly and spacedly distributed along the circumference of the fixed ring, a preheating cavity is communicated with the preheating box through the first communication part, a carburizing cavity is communicated with the carburizing box through the second communication part, the sealing plates are provided with loading grooves which penetrate through the sealing plates, a feeding cavity is communicated with the loading grooves, the hanger is used for fixing and hanging the gear, and the gear sequentially passes through the preheating cavity, the carburizing cavity and a transition cavity in sequence along with the rotation of a rotating shaft and then enters the quenching box. The application can be more suitable for the scene of small-batch and high-precision gears.

Description

Technical Field

[0001] This application relates to the technical field of gear heat treatment, and in particular to a gear heat treatment system and process. Background Technology

[0002] Gear heat treatment mainly employs the logic of surface carburization, microstructure strengthening, and stress release to achieve the core properties of surface hardness and core toughness. The main processes of gear heat treatment include preheating, carburizing, cooling transition, quenching, and tempering. The main heat treatment systems are continuous furnaces and box furnaces.

[0003] Continuous furnaces are directly connected. Taking a continuous furnace consisting of a pusher-type carburizing furnace, a quenching chamber, and a pusher-type slow cooling furnace as an example, the carburizing furnace outlet of the pusher-type carburizing furnace is connected to one side of the sealed front chamber of the quenching chamber, and the carburizing furnace outlet is equipped with a sealed furnace door. The sealed front chamber of the quenching chamber acts as a "transfer platform," where the carburizing furnace discharge mechanism selectively pushes the workpieces processed by the pusher-type carburizing furnace to the workpiece quenching moving mechanism in the sealed front chamber, and then into the quenching tank for quenching. There are various methods for transporting gears in continuous furnaces, commonly including conveyor belts, roller systems, and traveling beams.

[0004] Box furnaces typically lack a dedicated cooling chamber. After carburizing, the gears are cooled to a certain temperature within the furnace before being removed and air-cooled, then reloaded for quenching. Before reloading, the gears undergo pre-treatment processes such as cleaning and inspection to ensure quenching quality. Gear transport within the box furnace relies primarily on manual labor or simple mechanical devices.

[0005] Box furnaces are more suitable for small batches of low-precision gears, while continuous furnaces are suitable for large batches of high-precision gears. In some laboratories, where small batches of high-precision gears need to be processed, only continuous furnaces can be used, but continuous furnaces have a larger overall footprint. Summary of the Invention

[0006] To better suit scenarios involving small-batch, high-precision gears, this application provides a gear heat treatment system and process.

[0007] In a first aspect, this application provides a gear heat treatment system, which adopts the following technical solution:

[0008] A gear heat treatment system, comprising:

[0009] Preheating box;

[0010] A carburizing box is fixed above the preheating box, and the inlet of the carburizing box and the outlet of the preheating box can be connected.

[0011] A fixing ring, which passes through the preheating box and the carburizing box, has sealing plates fixedly installed on both ends of the fixing ring along the axial direction;

[0012] The drive shaft is coaxially arranged with the fixed ring;

[0013] The drive source drives the drive shaft to rotate at a fixed angle;

[0014] The partition has four partitions evenly spaced along the circumference of the drive shaft, which divide the inner cavity of the fixing ring into four cavities, namely, a feeding cavity, a preheating cavity, a carburizing cavity, and a transition cavity in a counterclockwise direction. The fixing ring is provided with a first connecting part and a second connecting part. The preheating cavity is connected to the preheating box through the first connecting part, and the carburizing cavity is connected to the carburizing cavity through the second connecting part. The sealing plate has a through-hole for a loading groove, and the feeding cavity is connected to the loading groove.

[0015] When the drive shaft stops, the partitions respectively block the feed inlet of the preheating box, the discharge outlet of the preheating box, and the discharge outlet of the carburizing box;

[0016] The quenching box has its inlet connected to the transition cavity via a through slot.

[0017] The bracket, used for fixing and attaching the gear, slides into the fixed ring through the feeding chamber and passes through it sequentially as the drive shaft rotates.

[0018] The tube passes through a preheating chamber, a carburizing chamber, and a transition chamber before entering the quenching chamber.

[0019] By adopting the above technical solution, the carburizing box is fixed above the preheating box, and the fixing ring runs through the preheating. It adopts a vertical stacking and coaxial through-through design. Compared with the horizontal connection structure of traditional continuous furnaces (such as the horizontal connection between the pusher carburizing furnace and the quenching chamber), it greatly reduces the equipment footprint. Through the four-chamber partitioning and the fixed-angle rotation of the partition, the continuous flow of "feeding, preheating, carburizing, and transition" is realized, and the automatic and precise transfer of workpieces in a closed environment is achieved. Moreover, the transition chamber is directly connected to the quenching box through the through groove, which reduces the cumbersome process of air cooling and reloading after carburizing in the box furnace.

[0020] The partition plate slides into contact with the inner wall of the fixed ring and the sealing plate to form a seal, physically isolating each process stage. This allows preheating, carburizing, and quenching (connected by the transition cavity) to be carried out in their respective optimal atmospheres and temperatures without interference. In particular, the design of the transition cavity provides a controlled cooling zone for the carburized gears, avoiding oxidation, decarburization, or quenching cracking problems that may occur if the gears are directly quenched after being taken out of the furnace. When the drive shaft stops, the partition plate precisely seals each box opening, reducing the leakage of heat and carburizing medium in the preheating box and carburizing box. The bracket itself only installs a small number of gears, making it more suitable for scenarios involving small batches and high-precision gears.

[0021] Optionally, the bracket includes a support portion that contacts the two partitions and a bonding plate that fits against the inner wall of the fixing ring. The bonding plate is an arc plate with its center coaxial with the fixing ring. The bonding plate is provided with a first through hole and a first through groove. The bracket rotates with the drive shaft, and the first through hole connects to the first connecting portion or the first through groove connects to the second connecting portion.

[0022] By adopting the above technical solution, the arc-shaped bonding plate is coaxial with the fixing ring, ensuring the stability of the bracket when it rotates with the drive shaft. When the bracket rotates into the preheating box, the first through hole and the first connecting part are connected, and the first through groove is blocked by the fixing ring. When the bracket moves from the preheating box into the carburizing box, the first through hole and the first connecting part are misaligned, and the first through groove and the second connecting part gradually connect. The preheating box and the carburizing box remain independent and not connected. When the first through groove and the second connecting part are fully connected, the bracket is located in the carburizing box.

[0023] Optionally, the sealing plate is equipped with a push rod and a power component that drives the push rod to slide in a sealed manner. One end of the push rod is located in the transition cavity, and the push rod pushes the hanger to slide horizontally into the quenching box.

[0024] By adopting the above technical solution, the automatic and smooth transfer of the hanger from the transition cavity to the quenching box is realized, reducing manual operation and improving the automation level and safety of the production process.

[0025] Optionally, a rotating shaft is rotatably installed inside the quenching box, and the support part of the hanging bracket is slidably inserted into the rotating shaft. The quenching medium used for quenching inside the quenching box is located below the rotating shaft, and the hanging bracket is immersed in the quenching medium as the rotating shaft rotates.

[0026] By adopting the above technical solution, the gears can be cooled uniformly during the quenching process, which improves the quenching quality and reduces problems such as deformation and cracks caused by uneven cooling.

[0027] Optionally, the quenching box is connected to a cleaning box, which is close to the carburizing box. The cleaning box is equipped with a nozzle, a dryer, and a conveyor belt. The nozzle and the dryer are installed on the side wall of the cleaning box. After the discharge port door of the quenching box is opened, the rotating shaft drives the hanger to be placed on the conveyor belt. The quenching box is provided with a pusher for driving the rotating shaft away from the hanger.

[0028] By adopting the above technical solution, after the gear quenching is completed, the discharge port door of the quenching box opens, the telescopic component drives the rotating shaft to leave the hanging frame, the hanging frame falls onto the conveyor belt, the conveyor belt drives the hanging frame to move, the nozzle cleans the gear, and the dryer dries the cleaned gear.

[0029] Optionally, the cleaning chamber is connected to a tempering chamber.

[0030] By adopting the above technical solution, after the gears are cleaned and dried in the cleaning box, they enter the tempering box for tempering treatment via a conveyor belt or other conveying device.

[0031] Optionally, one end of the bonding plate in the arc direction is hinged to the support portion, and the other end is detachably connected to the support portion. The support portion is equipped with a pin for a gear to pass through, and the pin extends in the radial direction of the bonding plate.

[0032] By adopting the above technical solution, when installing the gear, the gear is passed through the pin, and then the end of the bonding plate that is detachably connected to the support is fixed; when disassembling the gear, the detachable connection is disconnected, the bonding plate is rotated around the hinge end, and the gear is taken out.

[0033] Optionally, the pin is slidably connected to multiple partition rods, the two ends of the partition rods are variable diameter structures, the outer diameter of the two ends of the partition rods is smaller than the outer diameter of the middle part of the partition rods, and one end of the partition rods abuts against the bonding plate.

[0034] By adopting the above technical solution, mutual collision and squeezing of gears during heat treatment are effectively prevented, the processing quality of gears is improved, and the system can adapt to the processing needs of gears of different sizes, thus increasing the versatility of the system.

[0035] Secondly, this application provides a gear heat treatment process, which adopts the following technical solution:

[0036] A gear heat treatment process, using the aforementioned gear heat treatment system, includes the following steps:

[0037] S1. Install the gears to be processed one by one onto the hanger;

[0038] S2. Turn on the drive source to allow the bracket to enter the preheating chamber;

[0039] S3. After preheating is complete, the drive source continues to work, and the bracket enters the carburizing chamber;

[0040] S4. After carburizing is completed, the bracket enters the transition cavity through the drive source;

[0041] S5. When the hanger leaves the transition cavity, the hanger is pushed into the quenching box by the push rod. The hanger slides onto the rotating shaft and rotates with the rotating shaft, so that the gear is immersed in the quenching medium for cooling.

[0042] S6. After quenching, open the quenching box door. The rotation degree of the shaft increases. Send the hanger and gear into the cleaning box. The gear is cleaned and dried.

[0043] S7. After drying, the gears are conveyed out of the cleaning box by a conveyor belt and transferred to the tempering box for tempering treatment.

[0044] By adopting the above technical solution, the gear is installed on the hanger and enters the feeding chamber through the loading chute. When the drive source is turned on, the hanger sequentially enters the preheating box, carburizing box, and transition chamber, and is pushed into the quenching box by the push rod. In the quenching box, the gear is quenched by rotating the shaft. Then, it enters the cleaning box for cleaning and drying, and finally enters the tempering box for tempering. This achieves efficient and automated heat treatment for small batches of high-precision gears, improves the quality and production efficiency of the gears, and meets the needs of laboratories and other scenarios for heat treatment of small batches of high-precision gears.

[0045] In summary, this application includes at least one of the following beneficial effects:

[0046] 1. The preheating box and carburizing box are designed to be stacked vertically, and a fixed ring running through them serves as a transmission channel. The fixed ring is divided into four functional chambers (feeding, preheating, carburizing, and transition). The drive source controls the rotation of 90 degrees each time to realize the step-by-step transmission of the workpiece, which reduces the plane space occupied by the equipment and allows the gears to automatically and continuously go through key processes such as preheating, carburizing, and transition in a closed environment.

[0047] 2. A sliding seal is formed between the partition plate and the inner wall of the fixed ring and the sealing plate, which physically isolates each chamber, allowing preheating and carburizing to be carried out independently and at their optimal temperature and atmosphere without interference. Moreover, the transition chamber provides a controlled buffer cooling zone for the carburized gear, avoiding direct exposure to air or rapid cooling. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the overall structure of the gear heat treatment system according to an embodiment of this application;

[0049] Figure 2 This is a side view schematic diagram of a gear heat treatment system according to an embodiment of this application;

[0050] Figure 3 It is a manifestation Figure 2 AA section view;

[0051] Figure 4 This is a schematic diagram illustrating the structure of the gear heat treatment system according to an embodiment of this application, showing the driving gear and the driven gear;

[0052] Figure 5 This is a partial cross-sectional schematic diagram of a gear heat treatment system according to an embodiment of this application;

[0053] Figure 6 This is a schematic diagram of the overall structure of the hanger in the gear heat treatment system according to an embodiment of this application;

[0054] Figure 7 It is a manifestation Figure 2 BB section view;

[0055] Figure 8 It is a manifestation Figure 2 CC section view;

[0056] Figure 9 This is a schematic diagram illustrating the gear heat treatment system of this application, showing the gear submerged in coolant;

[0057] Figure 10 This is a cross-sectional view of the gear heat treatment system according to an embodiment of this application, showing the screw and slider engagement;

[0058] Figure 11 This is a process flow diagram of gear heat treatment according to an embodiment of this application.

[0059] Explanation of reference numerals in the attached drawings: 100, Preheating box; 200, Carburizing box; 300, Quenching box; 310, Rotating shaft; 320, Screw; 330, Sliding block; 400, Cleaning box; 410, Nozzle; 420, Dryer; 430, Conveyor belt; 500, Tempering box; 600, Fixing ring; 610, Sealing plate; 611, Loading trough; 612, Through slot; 613, Push rod; 601, Feeding chamber; 602, Preheating chamber; 603. 604. Carburizing chamber; 605. Transition chamber; 606. First connecting part; 607. Second connecting part; 700. Drive shaft; 710. Partition plate; 720. Drive gear; 730. Driven gear; 800. Hanger; 810. Support part; 811. Pin; 812. Divider rod; 813. Insertion hole; 820. Adhesive plate; 821. First through hole; 822. First through groove; 823. Bolt; 830. Sealing plate; 10. Box door. Detailed Implementation

[0060] The following is in conjunction with the appendix Figure 1 -Appendix Figure 11 This application will be described in further detail.

[0061] In a first aspect, embodiments of this application provide a gear heat treatment system.

[0062] Reference Figure 1 A gear heat treatment system includes a preheating box 100, a carburizing box 200, a quenching box 300, a cleaning box 400, and a tempering box 500, wherein the carburizing box 200 is installed on the upper surface of the preheating box 100.

[0063] Reference Figure 2 and Figure 3A retaining ring 600 passes through the preheating box 100 and the carburizing box 200, passing sequentially through the inlet and outlet of the preheating box 100 and the outlet of the carburizing box 200. The inlet and outlet of the carburizing box 200 are the same, and they face the same direction. The retaining ring 600 is fixedly installed between the preheating box 100 and the carburizing box 200.

[0064] Reference Figure 1 and Figure 2 Both ends of the fixed ring 600 are fixedly installed with sealing plates 610. The sealing plates 610 and the fixed ring 600 are located inside the preheating box 100 and the carburizing box 200. The drive shaft 700 passes through the preheating box 100 and the carburizing box 200, and the drive shaft 700 also passes through the two sealing plates 610.

[0065] Reference Figure 2 and Figure 3 Four partitions 710 are fixedly installed on the drive shaft 700. The four partitions 710 are evenly distributed along the circumference of the drive shaft 700. The partitions 710 divide the inner cavity of the fixing ring 600 into four cavities, which are, in counterclockwise order, the feeding cavity 601, the preheating cavity 602, the carburizing cavity 603, and the transition cavity 604.

[0066] A drive source is installed between the carburizing box 200 and the preheating box 100 to drive the drive shaft 700 to rotate at a fixed angle. The drive source drives the drive shaft 700 to rotate by 90° each time. The position of the same partition 710 changes, but the partition 710 still blocks the feed inlet and outlet of the preheating box 100 and the outlet of the carburizing box 200. At the feed inlet of the preheating box 100, the partition 710 prevents outside air from entering the preheating box 100, reducing heat loss; at the outlet of the preheating box 100, the partition 710 prevents the leakage of heat and carburizing medium from the preheating box 100 and the carburizing box 200.

[0067] Specifically, refer to Figure 4 The drive source includes a motor, a drive gear 720, and a driven gear 730. The motor and the drive gear 720 are fixedly connected, and the driven gear 730 and the drive shaft 700 are coaxially fixedly connected. The drive gear 720 and the driven gear 730 mesh.

[0068] Reference Figure 5 The fixing ring 600 has a first connecting part 605 in the preheating chamber 602 to connect the preheating box 100 and the preheating chamber 602, and the fixing ring 600 has a second connecting part 606 in the carburizing chamber 603 to connect the carburizing box 200 and the carburizing chamber 603.

[0069] Reference Figure 4The sealing plate 610 has a loading groove 611 for communicating with the feeding chamber 601.

[0070] Reference Figure 4 and Figure 5 A gear heat treatment system also includes a bracket 800 for supporting the gear, which enters the feed chamber 601 through a feed chute. The bracket 800 includes a support portion 810 and a contact plate 820. The two mutually perpendicular outer side walls of the support portion 810 are in close contact with the two partitions 710 within the fixing ring 600, providing stable support for the bracket 800. During the rotation of the bracket 800 with the drive shaft 700, the support portion 810 maintains good contact with the partitions 710, ensuring stable operation of the bracket 800 within the fixing ring 600.

[0071] Reference Figure 5 The bonding plate 820 is attached to the inner wall of the fixing ring 600 and is shaped as an arc plate. The central axis of the bonding plate 820 is coaxial with the central axis of the fixing ring 600. The bonding plate 820 is provided with a first through hole 821 and a first through groove 822, which are offset from each other.

[0072] When the hanger 800 rotates with the drive shaft 700, and the hanger 800 rotates into the preheating box 100, the first through hole 821 and the first connecting part 605 gradually connect, and the first through groove 822 is blocked by the fixing ring 600. The hot air in the preheating box 100 can enter the preheating cavity 602 where the hanger 800 is located through the first connecting part 605 and the first through hole 821 to preheat the gear.

[0073] As the bracket 800 moves from the preheating box 100 into the carburizing box 200, the first through hole 821 and the first connecting part 605 are misaligned, and the bracket 800 gradually moves away from the first connecting part 605, ensuring that the preheating box 100 and the carburizing box 200 remain independent and unconnected. The first through slot 822 and the second connecting part 606 gradually connect. When the first through slot 822 and the second connecting part 606 are fully connected, the bracket 800 is completely located inside the carburizing box 200, and the carburizing medium inside the carburizing box 200 can enter the carburizing chamber 603 through the second connecting part 606 and the first through slot 822 to perform carburizing treatment on the gear.

[0074] Reference Figure 4 and Figure 6 A sealing plate 830 is also fixedly connected to one end face of the bracket 800 along the axial direction. When the bracket 800 is installed into the feeding chamber 601 inside the fixing ring 600, the sealing plate 830 seals the loading groove 611. During the process of the bracket 800 entering the preheating box 100 along with the rotation of the drive shaft 700, the heat in the preheating box 100 is not easily lost.

[0075] Reference Figure 6One end of the bonding plate 820 in the arc direction is hinged to the support part 810, and the other end is detachably connected to the support part 810, such as by a bolt 823 passing through the bonding plate 820 and threadedly connecting the bolt 823 and the support part 810, thus fixing the bonding plate 820 and the support part 810 together. A pin 811 is fixedly installed on the support part 810, and the gear is coaxially sleeved with the pin 811, with a gap between them. A partition rod 812 is coaxially inserted through the pin 811, and multiple partition rods 812 slide on one pin 811. The pin 811 extends radially along the bonding plate 820. One end of the pin 811 contacts the bonding plate 820. The two ends of the partition rod 812 have a variable diameter structure, with the outer diameter at both ends being smaller than the outer diameter at the middle. The outer walls of the two partition rods 812 abut against the gear, and the gear is fixedly installed between the two partition rods 812. When multiple gears are mounted on the pin 811, the separator rod 812 prevents the gears from colliding and squeezing against each other. Because the separator rod 812 can slide on the pin 811 and has its own variable diameter structure, it can be flexibly adjusted according to the bore size and number of gears, increasing the system's versatility and enabling it to adapt to the processing needs of gears of different sizes and specifications.

[0076] Reference Figure 7 and Figure 8 The quenching box 300 is securely mounted on another sealing plate 610, which has a through groove 612. The cross-section of the through groove 612 is the same as that of the hanger 800. A door 10 is installed at the inlet of the quenching box 300. When the door 10 is opened by moving upwards with a cylinder, the through groove 612 becomes a connecting channel between the inlet of the quenching box 300 and the transition cavity 604, allowing the hanger 800, which has completed the carburizing and transition stages in the transition cavity 604, to smoothly enter the quenching box 300. An inert gas is connected to the fixing ring 600 at the transition cavity 604, ensuring that the hanger 800 has no oxygen contact after entering the transition cavity 604 and can be appropriately cooled, providing a transition for the gear during the process from the carburizing box 200 to the quenching box 300.

[0077] A push rod 613 and a power component that drives the push rod 613 to slide in a sealed manner are also installed on the sealing plate 610. One end of the push rod 613 is always inserted into the sealing plate 610. The power component is a cylinder or an electric telescopic rod. When the hanger 800 enters the transition cavity 604 with the rotation of the drive shaft 700, the gear cools down to a temperature suitable for entering the quenching box 300. The quenching box 300 opens, the power component starts to work, pushes the push rod 613, the push rod 613 contacts the sealing plate 830, and smoothly pushes the hanger 800 to slide horizontally into the quenching box 300.

[0078] Reference Figure 7 and Figure 8A rotating shaft 310 is rotatably installed inside the quenching chamber 300. The rotating shaft 310 is driven to rotate by a motor whose rotation angle can be controlled. A through-hole 813 is provided on the support part 810 of the hanger 800. The hanger 800 enters the quenching chamber 300, and the support part 810 of the hanger 800 slides into the rotating shaft 310 through the through-hole 813. There is strong friction between the rotating shaft 310 and the hanger 800; when the rotating shaft 310 rotates, it pulls the hanger 800 along with it.

[0079] Reference Figure 9 The coolant used for quenching in the quenching chamber 300 is located below the rotating shaft 310. When the rotating shaft 310 starts to rotate, the bracket 800 will closely follow the rotation of the rotating shaft 310 and gradually be immersed in the coolant. During this process, the gears on the bracket 800 can evenly contact the coolant, achieving a uniform cooling effect.

[0080] A gear heat treatment system also includes a cleaning chamber 400 and a tempering chamber 500. The cleaning chamber 400 is closely connected to the quenching chamber 300, forming an important link in the gear heat treatment process. The cleaning chamber 400 is close to the carburizing chamber 200. This layout design makes the structure of the entire heat treatment system more compact and reasonable, reduces the transportation distance and time of gears between different treatment stages, and improves production efficiency.

[0081] Reference Figure 7 and Figure 8 Inside the cleaning tank 400, a nozzle 410, a dryer 420, and a conveyor belt 430 are installed. The nozzle 410 and the dryer 420 are installed on the side wall of the cleaning tank 400, facing the conveyor belt 430.

[0082] When the gear needs to be transferred from the quenching box 300 to the cleaning box 400, first open the box door 10 of the quenching box 300 outlet, control the motor, increase the rotation angle of the rotating shaft 310, and let the hanger 800 fall on the conveyor belt 430.

[0083] Reference Figure 10 The quenching chamber 300 is equipped with a pusher for driving the rotating shaft 310 away from the hanger 800. The pusher includes a screw 320 and a slider 330. The slider 330 is connected to a base for mounting a motor. When the screw 320 is rotated, the slider 330 slides horizontally. The screw 320 can also be connected to a motor as a power source for rotation. The rotation of the screw 320 drives the slider 330 to slide, driving the rotating shaft 310 away from the hanger 800, but one end of the rotating shaft 310 always remains inside the quenching chamber 300.

[0084] After the rotating shaft 310 leaves the hanger 800, the conveyor belt 430 drives the gear on the hanger 800 to move closer to the nozzle 410 and then stops, closing the door 10 of the quenching box 300's inlet. The nozzle 410 starts, spraying cleaning fluid onto the end of the hanger 800 where the sealing plate 830 is not installed. The cleaning fluid can be clean water, a special cleaning agent, or a mixture of both, selected according to the dirt on the gear surface and process requirements. The spray angle and pressure of the nozzle 410 are precisely adjusted to ensure that the cleaning fluid evenly covers the gear surface, effectively removing impurities, oil, and oxide scale remaining on the gear surface during quenching, providing a clean surface for subsequent drying and tempering treatments.

[0085] After the gears are cleaned and dried in the cleaning chamber 400, they enter the tempering chamber 500 for tempering. The cleaning chamber 400 and the tempering chamber 500 are connected by a conveyor belt 430 or other conveying device, allowing the hanger 800 to smoothly enter the tempering chamber 500 and ensuring that the gears can be smoothly transferred from the cleaning chamber 400 to the tempering chamber 500. Inside the tempering chamber 500, the gears are heated to a certain temperature and maintained for a period of time, and then slowly cooled.

[0086] Furthermore, the preheating furnace, carburizing furnace, and quenching furnace of the gear heat treatment system are all existing technologies and do not require fundamental changes. Each has its own temperature control system. The carburizing furnace also has a gas control system for controlling inert gases and carburizing gases (such as a mixture of methane or propane and nitrogen), which will not be elaborated upon in this application. The partition 710, the rotating shaft 310, and the bracket 800 are themselves made of non-thermal conductive materials, or their surfaces are coated with non-thermal conductive materials.

[0087] The implementation principle of a gear heat treatment system according to an embodiment of this application is as follows:

[0088] First, the gear is installed on the hanger 800, and the hanger 800 is fed into the feed chamber 601 through the loading groove 611 on the sealing plate 610. Then, the drive source is turned on, causing the drive shaft 700 to rotate, driving the hanger 800 into the preheating box 100, the carburizing box 200, and the transition chamber 604 in sequence. In the transition chamber 604, the hanger 800 completes the transition treatment after carburizing, and the push rod 613, driven by the power component, pushes the hanger 800 horizontally into the quenching box 300. As the hanger 800 leaves the transition chamber 604, it slides onto the rotating shaft 310 in the quenching box 300. The rotating shaft 310 rotates, causing the hanger 800 to be immersed in the coolant for quenching. After quenching, the rotating shaft 310 rotates again, sending the hanger 800 into the cleaning box 400. The nozzle 410 in the cleaning box 400 cleans the gear, and the dryer 420 dries the cleaned gear. Finally, the gear enters the tempering chamber 500 via conveyor belt 430 for tempering treatment, completing the entire gear heat treatment process.

[0089] Secondly, embodiments of this application provide a gear heat treatment process.

[0090] Reference Figure 11 A gear heat treatment process employing the aforementioned gear heat treatment system to perform comprehensive heat treatment on gears includes key steps such as preheating, carburizing, transition, quenching, cleaning, and tempering. Specifically, it includes the following steps:

[0091] S1. Install the gears to be processed one by one onto the hanger 800, ensuring that each gear is securely installed and evenly spaced. Check whether each unit of equipment, such as the preheating box 100, carburizing box 200, quenching box 300, cleaning box 400 and tempering furnace, is working properly, and ensure that the temperature control system is accurate.

[0092] S2. Turn on the drive source to allow the bracket 800 to slowly enter the preheating chamber 602. The preheating box 100 and the preheating chamber 602 are connected through the first through hole 821 and the first connecting part 605. The preheating temperature is set to 450℃, and the preheating time is 60 minutes. This step aims to eliminate internal stress in the gears and prepare them for subsequent carburizing treatment.

[0093] S3. After preheating, the drive source continues to work, and the bracket 800 enters the carburizing chamber 603. It is connected through the first through groove 822 and the second connecting part 606, so that the carburizing box 200 and the carburizing chamber 603 are connected. The carburizing temperature is set to 920℃ and the carburizing time is 180 minutes. During this process, carburizing gas (such as a mixture of methane or propane and nitrogen) is introduced into the carburizing box 200, so that the gear surface absorbs carbon atoms to form a high carbon layer, thereby improving the surface hardness and wear resistance of the gear.

[0094] S4. After carburizing, the hanger 800 enters the transition cavity 604 through the drive source. The temperature of the transition cavity 604 is set to 850℃ and held for 30 minutes. This step is used to balance the temperature difference between the inside and outside of the gear, reduce thermal stress, and prepare for quenching.

[0095] S5. When the hanger 800 leaves the transition cavity 604, it is quickly pushed into the quenching box 300 by the push rod 613. At the same time, the hanger 800 slides onto the rotating shaft 310. The hanger 800 rotates with the rotating shaft 310, so that the gear is immersed in the coolant for cooling. The quenching medium is oil quenching, and the quenching temperature is 840℃ (directly transferred from the temperature of the transition cavity 604 without additional heating). The quenching time is determined according to the size and material of the gear, generally 10-20 minutes. During this period, the rotating shaft 310 does not move to ensure uniform cooling of the gear, forming a martensitic structure and improving hardness and strength.

[0096] S6. After quenching, open the door 10 of the quenching chamber 300. The rotation degree of the shaft 310 increases, and the hanger 800 along with the gear is sent into the cleaning chamber 400. Use a high-pressure water gun or spray system to thoroughly clean the gear to remove residual quenching oil and other impurities from the surface. The cleaning water temperature is controlled at about 60℃, and the cleaning time is about 15 minutes. After cleaning, use a hot air circulation system to dry the gear at 100℃ for 10 minutes to ensure that the gear surface is dry and free of moisture.

[0097] S7. After drying, the gears are conveyed out of the cleaning box 400 via the conveyor belt 430 and transferred to the tempering box 500 for tempering treatment. The tempering temperature is set to 200℃ and the tempering time is 120 minutes. After the tempering treatment is completed, all heating sources are turned off. After the temperature inside the tempering furnace has cooled naturally to room temperature, the gears are taken out from the rack 800 for quality inspection and packaging.

[0098] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gear heat treatment system, characterized by, The utility model relates to a kind of carburizing box and quenching box, including: Preheating box (100);Carburizing box (200), the carburizing box (200) is fixed above the preheating box (100), fixed ring (600) is through the preheating box (100) and the carburizing box (200), both ends of the fixed ring (600) axial surface are fixedly installed with sealing plate (610);Driving shaft (700), coaxial with the fixed ring (600) is arranged;Driving source, driving the driving shaft (700) fixed angle rotation;Baffle (710), the baffle (710) is evenly spaced with four along the circumference of the driving shaft (700), the baffle (710) separates four cavities in fixed ring (600) inner chamber, in anticlockwise direction, it is feed cavity (601) in turn, preheating cavity (602), carburizing cavity (603) and transition cavity (604), the fixed ring (600) is provided with first communication part (605) and second communication part (606), the preheating cavity (602) is communicated with the preheating box (100) by the first communication part (605), the carburizing cavity (603) is communicated with the carburizing cavity (603) by the second communication part (606), the sealing plate (610) is through and is provided with loading slot (611), the feed cavity (601) is communicated with the loading slot (611);When the driving shaft (700) stops, the baffle (710) blocks the feed inlet of the preheating box (100) respectively, the discharge outlet of the preheating box (100) and the discharge outlet of the carburizing box (200);The feed inlet of the carburizing box (200) and the discharge outlet of the preheating box (100) are communicated by the baffle (710) rotation driven by the driving shaft (700);Quenching box (300), the feed inlet of the quenching box (300) is communicated with the transition cavity (604) by through slot (612);Hanger (800) is used for gear fixedly hanged, the hanger (800) is slid into through feed cavity (601) and enters fixed ring (600) inside, sequentially passes through preheating cavity (602), carburizing cavity (603) and transition cavity (604) along with the driving shaft (700) rotation, and then enters the quenching box (300) inside; The hanger (800) includes and two the baffle (710) contact support part (810), and the fixed ring (600) inner wall is attached to the attachment plate (820), the attachment plate (820) is circular arc plate, and the center is coaxial with the fixed ring (600);Attachment plate (820) is provided with first through-hole (821) and first through slot (822), the hanger (800) is rotated along with the driving shaft (700), the first through-hole (821) and the first communication part (605) or the first through slot (822) and the second communication part (606) are communicated; The sealing plate (610) is provided with a push rod (613) and a power element for driving the push rod (613) to seal and slide, one end of the push rod (613) is located in the transition cavity (604), and the push rod (613) pushes the hanger (800) to slide horizontally into the quenching box (300).

2. The gear heat treatment system of claim 1, wherein The quenching box (300) is provided with a rotating shaft (310) rotatably installed therein, the support part (810) of the hanger (800) is slidably inserted into the rotating shaft (310), the quenching medium for quenching in the quenching box (300) is located below the rotating shaft (310), and the hanger (800) is immersed in the quenching medium by rotating the rotating shaft (310).

3. A gear heat treatment system according to claim 2, wherein The quenching box (300) is connected with a cleaning box (400), the cleaning box (400) is close to the carburizing box (200), the cleaning box (400) is provided with a shower head (410), a dryer (420) and a conveying belt (430), the shower head (410) and the dryer (420) are installed on the side wall of the cleaning box (400), after the discharge door (10) of the quenching box (300) is opened, the rotating shaft (310) is rotated to drive the hanger (800) to be placed on the conveying belt (430), and the quenching box (300) is provided with a pushing element for driving the rotating shaft (310) to move away from the hanger (800).

4. A gear heat treatment system according to claim 3, wherein The cleaning box (400) is connected with a tempering box (500).

5. The gear heat treatment system of claim 1, wherein One end of the arc-shaped direction of the fitting plate (820) is hinged to the support part (810), and the other end is detachably connected to the support part (810), the support part (810) is provided with a bolt (811) for passing through the gear, and the bolt (811) extends along the radial direction of the fitting plate (820).

6. A gear heat treatment system according to claim 5, wherein A plurality of partition rods (812) are slidably connected to the bolt (811), both ends of the partition rod (812) are variable-diameter structures, the outer diameter of both ends of the partition rod (812) is smaller than the outer diameter of the middle part of the partition rod (812), and one end of the partition rod (812) abuts against the fitting plate (820).

7. A gear heat treatment process characterized by, The gear heat treatment system of claim 4 is used for processing, and the processing comprises the following steps: S1, the gears to be processed are installed on the hanger (800) one by one; S2, the driving source is started, and the hanger (800) enters the preheating cavity (602); S3, after preheating, the driving source continues to work, and the hanger (800) enters the carburizing cavity (603); S4, after carburizing, the hanger (800) enters the transition cavity (604) through the driving source; S5, when the hanger (800) leaves the transition cavity (604), the hanger (800) is pushed into the quenching box (300) through the push rod (613), the hanger (800) slides onto the rotating shaft (310), the hanger (800) rotates with the rotating shaft (310), and the gears are immersed in the quenching medium for cooling; S6, after quenching, the box door (10) of the quenching box (300) is opened, the rotating degree of the rotating shaft (310) is increased, the hanger (800) and the gears are sent into the cleaning box (400), the gears are cleaned and dried; S7, the gears after drying are sent out of the cleaning box (400) through the conveying belt (430) and are transferred to the tempering box (500) for tempering treatment.

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