An internal gear heat treatment apparatus and a heat treatment method thereof

Abstract

This invention relates to an internal gear heat treatment equipment and method, belonging to the field of internal gear heat treatment technology. It includes a frame assembly and an internal gear. A lifting assembly is fixedly installed in the middle of the frame assembly, and the internal gear is snapped onto the upper end of the lifting assembly. An installation assembly is fixedly installed on one side of the upper end of the frame assembly, and a heat treatment assembly is slidably snapped onto the installation assembly. During use, the lifting assembly facilitates the lifting and lowering of the internal gear, thus facilitating loading and unloading. The installation assembly drives the internal gear to rotate, and during rotation, the heat treatment assembly heats the inner side of the internal gear. During heat treatment, the laser heating head moves to ensure uniform heating of the teeth and recessed areas, improving the heat treatment effect and facilitating use. Simultaneous cleaning and cooling are performed while the internal gear rotates, simplifying operation.

Description

Technical Field

[0001] This invention relates to the field of internal gear heat treatment technology, and in particular to an internal gear heat treatment equipment and a heat treatment method thereof. Background Technology

[0002] An internal gear is a gear with teeth on an inner circle. It is typically used in internal meshing gear mechanisms, where the gear on the gear ring is the internal gear. With the development of modern industry and equipment, the application of internal gears is becoming increasingly widespread. Consequently, the quality of internal gears significantly affects the service life of equipment. To improve the performance of internal gears, heat treatment is required to process the teeth. After heat treatment, the hardness and wear resistance of the tooth surface are improved, thus extending the service life. Heat treatment equipment is required for this process, as illustrated in publication number CN103924043A, which describes an internal gear, its heat treatment method, and heat treatment equipment. In this case, the internal gear is integrally formed by an internal gear ring, a gear ring seat, and a half-shaft mounting hole. The half-shaft mounting hole extends from the gear ring seat. The internal gear ring consists of internal teeth, an outer ring, and an end face. The internal gear of this invention undergoes quenching of its tooth surface, outer circle, and end face separately. This process corrects the deformation caused by tooth surface quenching during outer circle and end face quenching, and increases the hardness of the outer circle and end face from 20-25 HRC to 30-50 HRC, significantly improving the hardness and toughness of the outer circle and end face of the integral internal gear. For example, publication number CN104561475A describes an internal gear heat treatment device, including an internal gear fixing device, a circular water supply header with multiple water nozzles on its inner side, each nozzle having an adjustable-angle nozzle, a high-frequency induction heater for heating the internal gear, and a controller. The controller controls the start-up, shutdown, and heating temperature of the high-frequency induction heater. The controller is also connected to the nozzles, stopping the spraying of cooling water when the internal gear reaches the martensitic transformation point. Simultaneously, the controller is electrically connected to a drive mechanism, automatically controlling the movement of the drive mechanism and thus controlling the rotation and vertical movement of the internal gear fixing device. This heat treatment device can minimize deformation of the internal gear during the quenching process, eliminate residual stress concentration in the internal gear caused by machining, reduce deformation caused by transformation and temperature gradient, and at the same time ensure the hardness and strength of the internal gear.

[0003] For example, publication number CN110241291A describes a method for improving the hardness of internal gears, comprising the following steps: Step 1: The entire internal gear undergoes solution treatment at a temperature of 400–450℃ for 4 hours; Step 2: After solution treatment, the outer cylindrical surface, upper end face, and lower end face of the internal gear are quenched at a temperature of 50–60℃; Step 3: After Step 2, the tooth surface of the internal gear is quenched at a temperature of 70–70℃; Step 4: After Step 3, the internal gear undergoes aging treatment at a temperature of 250–280℃ for 3 hours; Step 5: Natural cooling for 2 hours; Step 6: The outer cylindrical surface, upper end face, and lower end face of the internal gear are heated using an induction heater at a temperature of 200–220℃ for 1 hour; Step 7: Natural cooling to room temperature. This method can effectively improve the hardness of internal gears, making them more resistant to impact and extending their service life. However, during use, because the teeth of internal gears are uneven, current heat treatment equipment often uses electric heating. But during heating, the protrusions of the teeth and the depressions in the grooves often lead to uneven heating, resulting in different degrees of heat treatment in different parts of the internal gear, affecting the heat treatment effect and making it inconvenient to use. Summary of the Invention

[0004] To overcome the technical defects of the existing technology, the present invention provides an internal gear heat treatment equipment and its heat treatment method, which facilitates the movement of heating components according to protrusions and depressions, improves the heat treatment uniformity at different positions on the inner side of the internal gear, thereby improving the heat treatment effect, is convenient to use and easy to operate, and improves the heat treatment efficiency of internal gears.

[0005] The technical solution adopted in this invention is: a heat treatment device and method for internal gears, comprising a frame assembly and an internal gear, wherein a lifting assembly is fixedly installed at the middle position inside the frame assembly, the internal gear is snapped and fixed at the upper end of the lifting assembly, an installation assembly is fixedly installed on one side of the upper end of the frame assembly, and a heat treatment assembly is slidably snapped onto the installation assembly, the output end of the heat treatment assembly extends into the interior of the installation assembly, and the heat treatment assembly includes a slider, the slider being slidably snapped at the middle position of the upper end of the installation assembly, a movable plate is fixedly installed at the lower end of the slider, and laser heating heads are fixedly installed in a vertical array on the movable plate, with the output end of the laser heating heads facing the inner side of the internal gear, the frame assembly includes a liquid holding tank, and support legs are evenly fixedly installed at the lower end of the liquid holding tank, the lifting assembly being fixedly installed on the liquid holding tank. Inside the container, at the middle position, the mounting assembly is fixedly installed on the upper side of the liquid tank. During use, the technical solution is placed in the designated position via the support legs, and a cold extraction solution is injected into the liquid tank. During heat treatment, the internal gear is engaged with the lifting assembly, which allows the internal gear to move up and down. During processing, the internal gear rises into the mounting assembly via the lifting assembly and engages with the drive end in the mounting assembly. An external laser is activated, emitting laser light from the laser heating head and irradiating the internal gear to heat it, completing the heat treatment. During heat treatment, the internal gear rotates, facilitating sequential heating of the teeth and grooves inside the internal gear, improving the uniformity of the heat treatment process.

[0006] Preferably, the lifting assembly includes a lifting cylinder, which is fixedly installed in the middle of the interior of the liquid tank. A plane bearing is fixedly installed at the output end of the lifting cylinder, and a retaining plate is fixedly installed at the upper end of the plane bearing. The internal gear is fixedly installed on the upper end of the retaining plate, and the outer side of the retaining plate has a hollow structure. The lifting cylinder facilitates the lifting and lowering of the retaining plate. When the internal gear is engaged with the retaining plate, it is raised into the interior of the mounting assembly. Driven by the mounting assembly, the internal gear rotates on the retaining plate through the plane bearing, facilitating heat treatment at various positions of the internal gear and simplifying operation.

[0007] Preferably, the mounting assembly includes a mounting frame, which is L-shaped. A groove is formed at the middle of the upper end of the mounting frame, and the slider is slidably engaged within the groove. The movable plate is located at the lower end of the groove. A fan blade plate, also L-shaped, is fixedly mounted at the lower end of the mounting frame. An internal gear extends into the fan blade plate, and a notch is formed at the middle of one side of the fan blade plate. The output end of the laser heating head extends into the fan blade plate through the notch and irradiates the inner side of the internal gear. An air pump and a water pump are fixedly mounted on opposite sides of the upper end of the fan blade plate, and the output end of the water pump is fixedly mounted on the air pump. A liquid extraction pipe is fixedly installed, one end of which extends to the lower end of the liquid holding tank and communicates with the interior of the liquid holding tank. An air jet head and a water spray head are fixedly installed on both sides of the notch inside the fan blade, respectively. The air jet head is connected to the output end of the air pump, and the water spray head is connected to the output end of the water pump. A vertical pole is fixedly installed at the middle position of the upper end of the mounting frame, and a contact switch is fixedly installed at the lower end of the vertical pole. The contact switch contacts the middle position of the upper surface of the lifting assembly. A drive motor is fixedly installed at one end of the upper part of the mounting frame, and a drive gear is fixedly installed at the output end of the drive motor. The drive gear is located on the mounting frame. The lower side of the column is provided, and the drive gear meshes with the internal gear. A distance detector is fixedly installed on one side of the column, and the detection end of the distance detector illuminates the middle position of the drive gear. During use, the drive motor and the drive gear facilitate the drive of the internal gear, making it easy to rotate. Heat treatment is performed on various positions on the inner side of the internal gear. The column and the contact switch facilitate the control of the lifting height of the lifting cylinder. The distance detector facilitates the measurement of the distance between the column and the drive gear when the drive gear rotates. Due to the rotation of the drive gear, the column... The distance changes in a wave-like pattern, which facilitates the transmission and adjustment signals of the heat treatment component, allowing for adjustment of the distance between the laser heating head and the internal gear. This facilitates use, and during heat treatment, the air pump allows protective gas to be blown into the interior of the fan blades, not only removing impurities from the internal gear but also providing gas protection for the heat treatment area. After heat treatment, the water pump allows the cold extraction solution to be sprayed from the water nozzle, facilitating rapid cooling of the treated area and completing the heat treatment. After heat treatment, the lifting component allows the entire internal gear to be immersed in the cold extraction solution for subsequent processing, making it convenient to use.

[0008] Preferably, the heat treatment assembly further includes an electric telescopic rod, the output end of which is fixedly connected to the upper end of the slider. The electric telescopic rod is fixedly installed on the upper end of the mounting bracket and located at one end of the slide groove. During laser heating, the electric telescopic rod is opened and closed based on the value measured by the distance detector, thereby causing the slider to slide inside the slide groove. This allows adjustment of the distance between the laser heating head and the inner side of the internal gear, ensuring that the teeth and grooves are at the same distance from the laser heating head during heat treatment, guaranteeing that all positions are heated to the same degree and improving the heat treatment effect.

[0009] A heat treatment method for an internal gear heat treatment device, wherein the heat treatment process is as follows:

[0010] Step 1: Inject cold extraction liquid into the liquid tank and engage the internal gear with the locking plate in the lifting assembly;

[0011] Step 2: By opening the lifting cylinder, the internal gear rises into the interior of the mounting assembly, and the internal gear meshes with the drive gear, so that the contact switch contacts the locking plate.

[0012] Step 3: Turn on the external laser so that the laser is emitted from the laser heating head and the drive motor. The drive motor drives the drive gear to rotate, which in turn causes the internal gear to drive the snap-fit ​​disc to rotate on the plane bearing.

[0013] Step 4: Measure the distance between the pole and the drive gear using the distance detector, and control the contraction and extension of the electric telescopic pole according to the change in distance, so that the laser heating head moves to laser heat the teeth and grooves of the internal gear.

[0014] Step 5: During heat treatment, the air pump and the water pump are turned on. The air pump sprays protective gas through the jet nozzle, filling the inside of the fan blade plate with protective gas to protect the heat treatment area. The water pump sprays the cold extraction liquid through the water spray nozzle onto the inside of the internal gear for cooling, thus completing the heat treatment process.

[0015] The beneficial effects of this invention are as follows: During use, the lifting component facilitates the lifting and lowering of the internal gear, thereby facilitating loading and unloading. The mounting component drives the internal gear to rotate, and during rotation, the heat treatment component heats the inner side of the internal gear. During heat treatment, the laser heating head moves to ensure uniform heating of the teeth and recessed areas, improving the heat treatment effect and making it easy to use. Furthermore, simultaneous cleaning and cooling are performed while the internal gear rotates, making operation convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle.

[0018] Figure 3 This is a partial structural diagram of the frame assembly in this invention.

[0019] Figure 4 This is a schematic diagram of the installation component and the heat treatment component in this invention.

[0020] Figure 5 This is a partial structural diagram of the mounting components in this invention.

[0021] Figure 6 This is a structural schematic diagram of the mounting component from another angle in this invention.

[0022] Figure 7 This is a schematic diagram of the heat treatment component in this invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Frame assembly; 101. Liquid tank; 102. Support leg; 2. Internal gear; 3. Lifting assembly; 301. Lifting cylinder; 302. Surface bearing; 303. Clip plate; 4. Mounting assembly; 401. Mounting bracket; 402. Slide groove; 403. Fan blade; 404. Notch; 405. Air pump; 406. Water pump; 407. Liquid extraction pipe; 408. Jet nozzle; 409. Water spray head; 4010. Upright pole; 4011. Contact switch; 4012. Drive motor; 4013. Drive gear; 4014. Distance detector; 5. Heat treatment assembly; 501. Slider; 502. Movable plate; 503. Laser heating head; 504. Electric telescopic pole. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figure 1-7As shown, this embodiment provides an internal gear heat treatment device and its heat treatment method, including a frame assembly 1 and an internal gear 2. A lifting assembly 3 is fixedly installed in the middle of the interior of the frame assembly 1. The internal gear 2 is snapped and fixed to the upper end of the lifting assembly 3. An installation assembly 4 is fixedly installed on one side of the upper end of the frame assembly 1. A heat treatment assembly 5 is slidably snapped onto the installation assembly 4. The output end of the heat treatment assembly 5 extends into the interior of the installation assembly 4. The heat treatment assembly 5 includes a slider 501, which is slidably snapped into the middle of the upper end of the installation assembly 4. A movable plate 502 is fixedly installed at the lower end of the slider 501. Laser heating heads 503 are fixedly installed in a vertical array on the movable plate 502, and the output end of the laser heating heads 503 faces the inner side of the internal gear 2. The frame assembly 1 includes a liquid tank 101, and support legs 102 are evenly fixedly installed at the lower end of the liquid tank 101. The lifting assembly 3 is fixedly installed... The mounting assembly 4 is fixedly installed in the middle of the liquid tank 101, and fixedly installed on the upper side of the liquid tank 101. When in use, the technical solution is placed in the set position by the support leg 102, and the cold extraction solution is injected into the liquid tank 101. During heat treatment, the internal gear 2 is engaged with the lifting assembly 3. The lifting assembly 3 causes the internal gear 2 to rise and fall. During the treatment, the internal gear 2 is raised into the interior of the mounting assembly 4 by the lifting assembly 3 and engages with the drive end in the mounting assembly 4. The external laser is turned on, so that the laser is emitted from the laser heating head 503 and irradiates the internal gear 2 to heat the internal gear 2, thus completing the heat treatment. During the heat treatment, the internal gear 2 rotates, which facilitates the sequential heating of the teeth and grooves inside the internal gear 2, making the treatment convenient and improving the uniformity of the heat treatment.

[0026] The lifting assembly 3 includes a lifting cylinder 301, which is fixedly installed in the middle of the liquid tank 101. A plane bearing 302 is fixedly installed at the output end of the lifting cylinder 301, and a retaining plate 303 is fixedly installed at the upper end of the plane bearing 302. The internal gear 2 is fixedly installed on the upper end of the retaining plate 303. The outer side of the retaining plate 303 has a hollow structure. The lifting cylinder 301 facilitates the lifting and lowering of the retaining plate 303. When the internal gear 2 is engaged with the retaining plate 303, it is raised into the interior of the mounting assembly 4. After being driven by the mounting assembly 4, the internal gear 2 rotates on the retaining plate 303 through the plane bearing 302, which facilitates heat treatment at various positions of the internal gear 2 and makes operation convenient.

[0027] Mounting assembly 4 includes a mounting bracket 401, which is L-shaped. A groove 402 is formed at the middle of the upper end of the mounting bracket 401, and a slider 501 is slidably engaged inside the groove 402. A movable plate 502 is located at the lower end of the groove 402. A fan blade 403 is fixedly mounted at the lower end of the mounting bracket 401, and the fan blade 403 is L-shaped. An internal gear 2 extends into the fan blade 403, and a notch 404 is formed at the middle of one side of the fan blade 403. The output end of the laser heating head 503 extends into the fan blade 403 through the notch 404 and irradiates the inner side of the internal gear 2. An air pump 405 and a water pump 406 are fixedly mounted on both sides of the upper end of the fan blade 403, respectively. A liquid extraction pipe 407 is fixedly installed at the output end of the device. One end of the liquid extraction pipe 407 extends to the lower end of the liquid tank 101 and is connected to the interior of the liquid tank 101. An air jet head 408 and a water spray head 409 are fixedly installed on both sides of the notch 404 inside the fan blade plate 403. The air jet head 408 is connected to the output end of the air pump 405, and the water spray head 409 is connected to the output end of the water pump 406. A vertical pole 4010 is fixedly installed at the middle position of the upper end of the mounting bracket 401, and a contact switch 4011 is fixedly installed at the lower end of the vertical pole 4010. The contact switch 4011 contacts the middle position of the upper surface of the lifting assembly 3. A drive motor 4012 is fixedly installed at one end of the upper part of the mounting bracket 401, and the output end of the drive motor 4012 is fixed... A drive gear 4013 is installed on the lower side of the mounting bracket 401 and meshes with the internal gear 2. A distance detector 4014 is fixedly installed on one side of the upright 4010, and the detection end of the distance detector 4014 illuminates the middle position of the drive gear 4013. In use, the drive motor 4012 and the drive gear 4013 drive the internal gear 2, facilitating its rotation and heat treatment of various positions on the inner side of the internal gear 2. The height of the lifting cylinder 301 is controlled by the upright 4010 and the contact switch 4011. The distance detector 4014 facilitates measurement of the upright 4010 when the drive gear 4013 rotates. The distance between the laser heating head 503 and the internal gear 2 is varied in a wave-like pattern due to the rotation of the driving gear 4013. This facilitates the transmission of adjustment signals to the heat treatment component 5, adjusting the distance between the laser heating head 503 and the internal gear 2 for ease of use. During heat treatment, the air pump 405 blows protective gas into the interior of the fan blade plate 403, not only removing impurities from the internal gear 2 but also providing gas protection for the heat treatment area. After heat treatment, the water pump 406 sprays the cold extraction solution from the water spray head 409, facilitating rapid cooling of the treated area. After heat treatment, the lifting component 3 allows the internal gear 2 to be fully immersed in the cold extraction solution.Further processing will be performed for easier use.

[0028] The heat treatment assembly 5 also includes an electric telescopic rod 504, the output end of which is fixedly connected to the upper end of the slider 501. The electric telescopic rod 504 is fixedly installed on the upper end of the mounting bracket 401 and located at one end of the slide groove 402. During laser heating, the electric telescopic rod 504 is opened and closed based on the value measured by the distance detector 4014, thereby causing the slider 501 to slide inside the slide groove 402. This allows the length of the distance between the laser heating head 503 and the inner side of the internal gear 2 to be adjusted, thus ensuring that the teeth and grooves are at the same distance from the laser heating head 503 during heat treatment, guaranteeing that the degree of heating at each position is the same and improving the heat treatment effect.

[0029] The heat treatment process is as follows: Step 1: Inject cold extraction liquid into the liquid tank 101 and engage the internal gear 2 with the retaining plate 303 in the lifting assembly 3. Step 2: By opening the lifting cylinder 301, the internal gear 2 rises into the mounting assembly 4, and engages with the drive gear 4013, causing the contact switch 4011 to contact the retaining plate 303. Step 3: Turn on the external laser, so that the laser is emitted from the laser heating head 503 and drives the drive motor 4012. The drive motor 4012 drives the drive gear 4013 to rotate, thereby causing the internal gear 2 to drive the retaining plate 303 to rotate on the plane bearing 302. Step 4: Using distance detector 4014, measure the distance between the upright 4010 and the drive gear 4013, and control the contraction and extension of the electric telescopic rod 504 according to the change in distance, so that the laser heating head 503 moves to laser heat the teeth and grooves of the internal gear 2. Step 5: During heat treatment, turn on the air pump 405 and the water pump 406, and the air pump 405 sprays protective gas through the jet nozzle 408, so that the protective gas fills the inside of the fan blade plate 403 to provide gas protection for the heat treatment position. The water pump 406 sprays the cold extraction liquid through the water spray nozzle 409 to the inside of the internal gear 2 for cooling, thus completing the heat treatment process.

[0030] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. An internal gear heat treatment apparatus, characterized by: The assembly includes a frame assembly (1) and an internal gear (2). A lifting assembly (3) is fixedly installed in the middle of the interior of the frame assembly (1). The internal gear (2) is snapped and fixed to the upper end of the lifting assembly (3). An installation assembly (4) is fixedly installed on one side of the upper end of the frame assembly (1). A heat treatment assembly (5) is slidably snapped onto the installation assembly (4). The output end of the heat treatment assembly (5) extends into the interior of the installation assembly (4). The heat treatment assembly (5) includes a slider (501). The slider (501) is slidably snapped onto the middle of the upper end of the installation assembly (4). A movable plate (502) is fixedly installed at the lower end of the slider (501). A laser heating head (503) is fixedly installed in a vertical array on the movable plate (502). The output end of the laser heating head (503) faces the inside of the internal gear (2). The mounting component (4) includes a mounting bracket (401), and the mounting bracket (401) has an L-shaped structure. A groove (402) is provided at the middle of the upper end of the mounting bracket (401). A vertical pole (4010) is fixedly installed at the middle position of the upper end of the mounting bracket (401), and a contact switch (4011) is fixedly installed at the lower end of the vertical pole (4010). The contact switch (4011) is in contact with the middle position of the upper surface of the lifting assembly (3). A drive motor (4012) is fixedly installed at one upper end of the mounting bracket (401), and a drive gear (4013) is fixedly installed at the output end of the drive motor (4012). The drive gear (4013) is located on the lower side of the mounting bracket (401), and the drive gear (4013) meshes with the internal gear (2). A distance detector (4014) is fixedly installed on one side of the vertical pole (4010), and the detection end of the distance detector (4014) shines on the middle position of the drive gear (4013). The heat treatment assembly (5) further includes an electric telescopic rod (504), and the output end of the electric telescopic rod (504) is fixedly connected to the upper end of the slider (501). The electric telescopic rod (504) is fixedly installed on the upper end of the mounting bracket (401) and located at one end of the slide groove (402).

2. A process for heat treating an internal gear as set forth in claim 1, characterized in that: The frame assembly (1) includes a liquid tank (101), and support legs (102) are uniformly fixedly installed at the lower end of the liquid tank (101). The lifting assembly (3) is fixedly installed in the middle of the interior of the liquid tank (101), and the installation assembly (4) is fixedly installed on one side of the upper end of the liquid tank (101).

3. A device for heat treatment of an internal gear according to claim 2, characterized in that: The lifting assembly (3) includes a lifting cylinder (301), and the lifting cylinder (301) is fixedly installed in the middle of the inside of the liquid tank (101). A plane bearing (302) is fixedly installed at the output end of the lifting cylinder (301), and a snap-fit ​​plate (303) is fixedly installed at the upper end of the plane bearing (302). The internal gear (2) is snap-fitted and fixedly installed at the upper end of the snap-fit ​​plate (303), and the outer side of the snap-fit ​​plate (303) is a hollow structure.

4. A process and apparatus for heat treating an internal gear as set forth in claim 3, wherein: The slider (501) is slidably engaged inside the slide groove (402). The movable plate (502) is located at the lower end of the slide groove (402). The fan blade plate (403) is fixedly installed at the lower end of the mounting bracket (401). The fan blade plate (403) has an L-shaped structure. The internal gear (2) extends into the interior of the fan blade plate (403). A notch (404) is provided in the middle of one side of the fan blade plate (403). The output end of the laser heating head (503) extends into the interior of the fan blade plate (403) through the notch (404) and irradiates the inner side of the internal gear (2).

5. A process and apparatus for heat treating an internal gear as set forth in claim 4, wherein: An air pump (405) and a water pump (406) are fixedly installed on both sides of the mounting bracket (401) at the upper end of the fan blade (403). A liquid extraction pipe (407) is fixedly installed at the output end of the water pump (406). One end of the liquid extraction pipe (407) extends to the lower end of the liquid tank (101) and communicates with the interior of the liquid tank (101). An air jet head (408) and a water spray head (409) are fixedly installed on both sides of the notch (404) inside the fan blade (403). The air jet head (408) is connected to the output end of the air pump (405), and the water spray head (409) is connected to the output end of the water pump (406).

6. The heat treatment method of an internal gear heat treatment apparatus according to claim 5, characterized by, Includes the following steps: Step 1: Inject cold extraction liquid into the liquid tank (101) and engage the internal gear (2) with the engagement plate (303) in the lifting assembly (3); Step 2: By opening the lifting cylinder (301), the internal gear (2) is raised into the interior of the mounting assembly (4), and the internal gear (2) meshes with the drive gear (4013), so that the contact switch (4011) contacts the card plate (303); Step 3: Turn on the external laser so that the laser is emitted from the laser heating head (503) and the drive motor (4012). The drive motor (4012) drives the drive gear (4013) to rotate, which in turn causes the internal gear (2) to drive the snap-fit ​​plate (303) to rotate on the plane bearing (302). Step 4: Measure the distance between the pole (4010) and the drive gear (4013) using the distance detector (4014), and control the contraction and extension of the electric telescopic pole (504) according to the change in distance, so that the laser heating head (503) moves to laser heat the teeth and grooves of the internal gear (2); Step 5: During heat treatment, the air pump (405) and the water pump (406) are turned on, and the air pump (405) sprays protective gas through the jet head (408) so that the protective gas fills the inside of the fan blade plate (403) to provide gas protection for the heat treatment position. The water pump (406) sprays the cold extraction liquid through the water spray head (409) onto the inside of the internal gear (2) for cooling, thus completing the heat treatment process.

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