Surface heat treatment device for large-diameter shaft parts

Abstract

The utility model relates to the technical field of heat treatment equipment, in particular to a large-diameter shaft part surface heat treatment device which comprises a first frame body and a second frame body, the first frame body and the second frame body are arranged side by side in the length direction, and a clamping rotating device is arranged on the first frame body. The clamping and rotating device comprises a first moving assembly, a fixed clamping assembly and a movable clamping assembly, the movable clamping assembly is arranged on the opposite face of the fixed clamping assembly, a shaft part is arranged between the fixed clamping assembly and the movable clamping assembly in a clamped mode, the first moving assembly is arranged below the movable clamping assembly, and a movable quenching device is arranged on the second frame body. The movable clamping assembly is further provided with a pressure sensor assembly, the pressure sensor assembly is used for monitoring the stability of the shaft part clamped by the fixed clamping assembly and the movable clamping assembly, the clamping rotating device is provided with a protective cover assembly, and a water tank is arranged below the clamping rotating device and fixedly arranged on the first frame body.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment equipment, in particular to a surface heat treatment device for large-diameter shaft parts. Background Technique

[0002] In metal processing, in order to improve its surface hardness, strength, etc., heat treatment processing is carried out on the surface of metal workpieces to obtain non-diffusion transformation structures. At present, the existing surface heat treatment devices on the market have complex design structures, high costs, and are designed for most general parts. They have poor adaptability to large-diameter shaft workpieces with different diameters and lengths, and are prone to uneven surface heat treatment processing and poor effects. Therefore, it is necessary to design a special surface heat treatment device for large-diameter shaft workpieces to overcome the above problems. Summary of the Invention

[0003] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the utility model is to provide a surface heat treatment device for large-diameter shaft parts, which facilitates the surface heat treatment process of large-diameter shaft parts.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A surface heat treatment device for large-diameter shaft parts includes a first frame body and a second frame body. The first frame body and the second frame body are arranged side by side along the length direction. A clamping and rotating device is arranged on the first frame body. The clamping and rotating device includes a first moving component, a fixed clamping component, and a moving clamping component. A moving clamping component is arranged on the opposite surface of the fixed clamping component. A shaft part is clamped between the fixed clamping component and the moving clamping component. A first moving component is arranged below the moving clamping component. The first moving component is arranged on the first frame body. The first moving component includes a synchronous belt and lead screw transmission component and a linear guide rail component. A moving quenching device is arranged on the second frame body. The moving quenching device includes a second moving component and a quenching device. The second moving component is fixedly arranged on the second frame body. The second moving component includes a lead screw transmission component and a linear guide rail component. The quenching device is fixedly arranged on the second moving component. A pressure sensor component is further arranged on the moving clamping component. A protective cover component is arranged on the clamping and rotating device. A water tank is arranged below the clamping and rotating device. The water tank is fixedly arranged on the first frame body.

[0006] The fixed clamping component includes a base, a second motor, a clamping claw disc, and a first top pin shaft. The base is horizontally arranged above the first frame body and is arranged at one end of the first moving component. A second motor is arranged on the base. A clamping claw disc is fixedly arranged at the output shaft end of the second motor. A first top pin shaft is clamped at the end of the clamping claw disc. One end of the first top pin shaft is a cylindrical shaft, and the other end is a conical shaft.

[0007] The moving clamping assembly includes a mounting base plate, a support frame, a bearing cylinder, a rotating shaft, a bearing, and a bushing. The mounting base plate is fixedly arranged on the first moving assembly. A support frame is arranged on the mounting base plate, and a bearing cylinder is arranged on the support frame. A bearing is sleeved inside the bearing cylinder, and a rotating shaft is inserted through the bearing hole of the bearing. One end of the rotating shaft is provided with an end cover, and the other end is sleeved with a bushing. The end cover faces the fixed clamping assembly, and a second top pin shaft is arranged on the end cover. The second top pin shaft is arranged opposite to the first top pin shaft to cooperate with clamping the shaft part.

[0008] The second top pin shaft includes a cylindrical shaft. One end of the cylindrical shaft is provided with a mounting flange, and the mounting flange is fixedly arranged on the end cover. The other end of the cylindrical shaft is provided with a tapered shaft. A cylindrical cavity is also arranged inside the cylindrical shaft. The second top pin shaft is provided with a guiding pin hole penetrating along the central axis.

[0009] The pressure sensor assembly is arranged inside the cylindrical cavity. The pressure sensor assembly includes a first mounting block, a connecting plate, a pressure sensor, a second mounting block, a screw, a second linear rail set, a support fixing seat, a spring, and a guiding pin. The first mounting block is fixedly arranged on the end cover. A pressure sensor is inserted through the first mounting block, and the sensing head of the pressure sensor faces the inside of the cylindrical cavity. A connecting plate is arranged below the first mounting block. The second mounting block is arranged in parallel in front of the first mounting block, and the second mounting block is fixedly arranged on the connecting plate. A screw is slidably inserted through the second mounting block, and the screw head of the screw faces the sensing head of the pressure sensor. A second linear rail set is arranged in front of the second mounting block, and the second linear rail set is fixedly arranged on the connecting plate. The support fixing seat is fixedly arranged on the slider of the second linear rail set. The screw is screwed and fixed on the support fixing seat. The spring is sleeved on the rod and is arranged between the support fixing seat and the second mounting block. A guiding pin is inserted at the end of the screw, and the guiding pin is inserted through the guiding pin hole and extends out of the end face of the tapered shaft.

[0010] Clamping process holes are arranged on both end faces of the shaft part. The dimensions of the tapered shaft ends at the ends of the first top pin shaft and the second top pin shaft are matched with the aperture dimensions of the clamping process holes. The tapered shaft ends at the ends of the first top pin shaft and the second top pin shaft are top-mounted in the clamping process holes to clamp the shaft part.

[0011] The rotating shaft is provided with a through wire hole along the axis.

[0012] The shaft diameter of the cylindrical shaft of the first top pin shaft is matched with the clamping range of the clamping jaw disc.

[0013] The shield assembly includes a top plate, long side curtains, and end side plates. The top plate is arranged on the top of the first frame body. A set of end side plates are respectively arranged at the left and right ends of the first frame body. Long side curtains are arranged on the outer side of the first frame body. The top plate and the end side plates are made of transparent plates, and the long side curtains are made of transparent soft material curtains.

[0014] The beneficial effects of the present utility model:

[0015] A surface heat treatment device for large-diameter shaft parts of the present utility model arranges a clamping and rotating device and a moving quenching device side by side. The clamping and rotating device is provided with a fixed clamping component and a moving clamping component, which are used to clamp shaft parts of different length specifications. A motor and a clamping jaw disc are arranged on the fixed clamping component to clamp the shaft parts and realize the circumferential rotation of the shaft parts, ensuring uniform surface heat treatment effect of the shaft. The moving clamping component is arranged on a synchronous belt screw drive system and a linear guide rail group, and its position can be adjusted to adapt to the heat treatment operations of shaft parts of different lengths. A pressure sensor component is arranged on the moving clamping component to monitor the stability of clamping the shaft parts by the fixed clamping component and the moving clamping component, ensuring the stability of the device operation. The moving quenching device includes a quenching device, which is arranged on a screw drive system and is matched with a linear guide rail to ensure its operation stability. The quenching device can linearly displace along the shaft parts, and the rotation speed of the shaft parts is matched with the moving speed of the quenching device to ensure the surface heat treatment effect of the shaft parts. The structure of this device is simple, easy to operate, and has low cost. Description of the Drawings

[0016] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given in conjunction with the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation to the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the following drawings.

[0017] Figure 1 For the overall structure schematic Figure 1 ;

[0018] Figure 2 For the overall structure schematic Figure 2 ;

[0019] Figure 3 For the structural schematic diagram of the fixed clamping component and the moving clamping component;

[0020] Figure 4 For the structural schematic diagram of the moving clamping component;

[0021] Figure 5 For the structural schematic diagram of the pressure sensor component.

[0022] In the figure: 1 - First frame body, 2 - Second frame body, 3 - First moving component, 301 - First motor, 302 - First synchronous pulley, 303 - Second synchronous pulley, 304 - First lead screw assembly, 305 - First slide rail group, 4 - Fixed clamping component, 401 - Base, 402 - Second motor, 403 - Clamping jaw plate, 404 - First top pin shaft, 5 - Moving clamping component, 501 - Mounting base plate, 502 - Support frame, 503 - Bearing cylinder, 504 - Rotating shaft, 5041 - End cover, 5042 - Wiring hole, 505 - Second top pin shaft, 5051 - Mounting flange, 5052 - Cylindrical shaft, 5053 - Tapered shaft, 5054 - Cylindrical cavity, 5055 - Guide pin hole, 506 - Bearing, 507 - Bush, 6 - Shield component, 601 - Top plate, 602 - Long side curtain, 603 - End side plate, 7 - Second moving component, 701 - Third motor, 702 - Second lead screw group, 703 - Second slide rail group, 8 - Quenching equipment, 801 - Induction coil, 9 - Pressure sensor component, 901 - First mounting block, 902 - Connecting plate, 903 - Pressure sensor, 904 - Second mounting block, 905 - Screw, 906 - Second linear rail group, 907 - Support fixing seat, 908 - Blocking pin, 909 - Spring, 910 - Guide pin, 10 - Shaft part, 1001 - Clamping process hole, 11 - Water tank. Detailed implementation mode

[0023] To make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0024] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model.

[0025] Such as Figure 1 、 Figure 2As shown in the figure, a surface heat treatment device for large-diameter shaft parts includes a first frame 1, a second frame 2, a clamping and rotating device, and a moving quenching device. The first frame 1 and the second frame 2 are long frame structures and are arranged side by side along the length direction. A clamping and rotating device is arranged on the first frame 1 along the length direction. The clamping and rotating device includes a first moving component 3, a fixed clamping component 4, and a moving clamping component 5. The fixed clamping component 4 is arranged at the end of one side of the first frame 1, and the moving clamping component 5 is arranged on the opposite side of the fixed clamping component 4. The shaft part 10 is clamped between the fixed clamping component 4 and the moving clamping component 5. A first moving component 3 is arranged below the moving clamping component 5. The first moving component 3 is arranged on the first frame 1 and includes a synchronous belt and lead screw drive system and a linear guide group. A moving quenching device is arranged on the second frame 2. The moving quenching device includes a second moving component 7 and a quenching device 8. The second moving component 7 is fixedly arranged on the second frame 2. The second moving component 7 is a lead screw drive system. The quenching device 8 is fixedly arranged on the second moving component 7. The quenching device 8 can reciprocate on the second moving component 7. An induction coil 801 is arranged on the quenching device 8. The induction coil 801 is configured with an inductor and a supporting water spraying device, and the end is a circular ring structure. The induction coil 801 is arranged on one side of the shaft part 10, and the end circular ring of the induction coil 801 is sleeved on the shaft part 10 to perform heat treatment operations on the outer surface of the shaft part 10. A pressure sensor component 9 is also arranged on the moving clamping component 5 to detect the stability of clamping the shaft part 10 by the fixed clamping component 4 and the moving clamping component 5. A protective cover component 6 is arranged on the clamping and rotating device to prevent the coolant from splashing during heat treatment. A water tank 11 is arranged below the clamping and rotating device and is fixedly arranged on the first frame 1 to receive the cooling water generated by heat treatment.

[0026] Since the quenching device 8 and the induction coil 801 arranged thereon are general heat treatment equipment and accessories, their structures will not be described in detail here.

[0027] As Figure 2As shown in the figure, the first moving component 3 includes a first motor 301, a first synchronous pulley 302, a second synchronous pulley 303, a first lead screw assembly 304, and a first slide rail group 305. There are two sets of the first slide rail group 305, which are arranged along the length direction of the first frame body 1 and are disposed on the longitudinal beams on both sides of the first frame body 1. The first lead screw assembly 304 is arranged on the outer side wall of the first frame body 1 and is arranged along the length direction of the first frame body 1. A second synchronous pulley 303 is arranged at one shaft end of the first lead screw assembly 304, and a first synchronous pulley 302 is arranged to match the second synchronous pulley 303. The first synchronous pulley 302 is arranged at the output shaft end of the first motor 301. The moving clamping component 5 is fixedly arranged on the sliding seat of the first lead screw assembly 304 and the slider of the first slide rail group 305. The first motor 301 drives the first synchronous pulley 302 to operate. The first synchronous pulley 302 drives the second synchronous pulley 303 to rotate through a synchronous belt. The first lead screw assembly 304 connected to the second synchronous pulley 303 rotates and operates, and the moving clamping component 5 arranged on the first lead screw assembly 304 can move horizontally in a straight line.

[0028] As Figure 3 shown in the figure, the fixed clamping component 4 includes a base 401, a second motor 402, a clamping jaw disc 403, and a first top pin shaft 404. The base 401 is arranged across the top of the first frame body 1 and is arranged at one end of the side of the first moving component 3. A second motor 402 is arranged on the base 401. A clamping jaw disc 403 is fixedly arranged at the output shaft end of the second motor 402. The clamping jaw disc 403 in this embodiment is a three-jaw disc. A first top pin shaft 404 is clamped at the end of the three-jaw disc. One end of the first top pin shaft 404 is a cylindrical shaft, which is inserted into the clamping jaw disc 403. The shaft diameter of the cylindrical shaft is arranged to match the clamping range of the clamping jaw disc 403, and the other end is a conical shaft.

[0029] As Figure 3 、 Figure 4As shown, the movable clamping assembly 5 can move on the first moving assembly 3, and the movable clamping assembly 5 is arranged on the opposite side of the fixed clamping assembly 4. The movable clamping assembly 5 includes a mounting base plate 501, a support frame 502, a bearing cylinder 503, a rotating shaft 504, a bearing 506, and a bushing 507. The mounting base plate 501 is an L-shaped structure. The horizontal plate is fixedly arranged on the sliders of two groups of first slide rail groups 305, and the vertical plate is fixedly arranged on the sliding seat of the first lead screw assembly 304. Above the horizontal plate of the mounting base plate 501, there is a support frame 502. A bearing cylinder 503 is arranged on the support frame 502. A bearing 506 is sleeved inside the bearing cylinder 503. A rotating shaft 504 is inserted through the bearing hole of the bearing 506. At the other end of the rotating shaft 504, there is an end cap 5041. The end cap 5041 faces the fixed clamping assembly 4. A second top pin shaft 505 is arranged on the end cap 5041. The second top pin shaft 505 is arranged opposite to the first top pin shaft 404; at the other end of the rotating shaft 504, a bushing 507 is sleeved to fasten the relative position of the rotating shaft 504 and the bearing 506. As Figure 4 shown, the second top pin shaft 505 includes a cylindrical shaft 5052. At one end of the cylindrical shaft 5052, there is a mounting flange 5051. The mounting flange 5051 is fixedly arranged on the end cap 5041 arranged on the rotating shaft 504. At the other end of the cylindrical shaft 5052, there is a tapered shaft 5053 for cooperating with the tapered shaft arranged at the end of the first top pin shaft 404 to clamp the shaft part 10.

[0030] As Figure 3 shown, clamping process holes 1001 are arranged on both end faces of the shaft part 10. The tapered shaft end sizes at the ends of the first top pin shaft 404 and the second top pin shaft 505 are matched with the hole diameter sizes of the clamping process holes 1001. The tapered shaft ends at the ends of the first top pin shaft 404 and the second top pin shaft 505 are top-mounted in the clamping process holes 1001 to clamp the shaft part 10.

[0031] According to the different lengths of the shaft part 10, the movable clamping assembly 5 is set at a corresponding position to match the fixed clamping assembly 4 to clamp the shaft part 10.

[0032] As Figure 4 shown, a guide pin hole 5055 is arranged through the center axis of the second top pin shaft 505. A cylindrical cavity 5054 is also arranged inside the cylindrical shaft 5052 of the second top pin shaft 505. To make the clamping of the shaft part 10 by the fixed clamping assembly 4 and the movable clamping assembly 5 stable, a pressure sensor assembly 9 is arranged in the cylindrical cavity 5054 of the second top pin shaft 505. The pressure sensor assembly 9 is fixedly arranged on the end cap 5041 of the rotating shaft 504.

[0033] As Figure 5As shown in the figure, the pressure sensor assembly 9 includes a first mounting block 901, a connecting plate 902, a pressure sensor 903, a second mounting block 904, a screw 905, a second linear guide group 906, a support fixing seat 907, a spring 909, and a guide pin 910. The first mounting block 901 is vertically arranged and fixedly installed on the end cover 5041. The pressure sensor 903 is passed through the first mounting block 901, and the sensing head of the pressure sensor 903 faces the inside of the cylindrical cavity 5054. A connecting plate 902 is arranged below the first mounting block 901. A second mounting block 904 is arranged on the connecting plate 902. The second mounting block 904 is vertically and parallelly arranged in front of the first mounting block 901, and there is a certain distance between the second mounting block 904 and the first mounting block 901. A screw 905 is passed through the second mounting block 904. The screw 905 can slide on the second mounting block 904. The screw head of the screw 905 faces the sensing head of the pressure sensor 903, and the screw head of the screw 905 abuts against the sensing head of the pressure sensor 903. A second linear guide group 906 is arranged in front of the second mounting block 904. The second linear guide group 906 is fixedly installed on the connecting plate 902. The support fixing seat 907 is fixedly installed on the slider of the second linear guide group 906. The screw 905 is screwed and fixed on the support fixing seat 907. The spring 909 is sleeved on the rod 905 and is arranged between the support fixing seat 907 and the second mounting block 904. A guide pin 910 is inserted at the end of the screw 905. As Figure 3 shown, the guide pin 910 is passed through the guide pin hole 5055 and extends out of the end face of the tapered shaft 5053. When the tapered shaft ends of the first top pin shaft 404 and the second top pin shaft 505 are top-mounted in the clamping process hole 1001 and the shaft part 10 is clamped, the end of the guide pin 910 abuts against the bottom of the clamping process hole 1001. The guide pin 910 pushes the screw 905 to move. The screw head of the screw 905 gives a certain pressure to the sensing head of the pressure sensor 903. The pressure sensor 903 displays a certain pressure value. The pressure value range is set for the pressure sensor 903. If the pressure value is less than the set value, it means that the clamping on both sides of the shaft part 10 is loose and the clamping assembly 5 needs to be moved to clamp.

[0034] As Figure 4 shown, the rotating shaft 504 is provided with a through wire hole 5042 along the axis for the wiring of the tail line of the pressure sensor 903.

[0035] As Figure 2As shown in the figure, the second moving component 7 includes a third motor 701, a second lead screw group 702, and a second slide rail group 703. The second lead screw group 702 is fixedly arranged on the second frame body 2 along the length direction. One side shaft end of the second lead screw group 702 is connected to the output shaft of the third motor 701. One set of second slide rail groups 703 is arranged on each side of the second lead screw group 702. The bottom of the quenching device 8 is fixedly arranged on the sliding seat of the second lead screw group 702 and the slider of the second slide rail group 703. The third motor 701 drives the second lead screw group 702 to operate, and the quenching device 8 arranged on the second lead screw group 702 undergoes a horizontal linear displacement. The moving speed of the quenching device 8 on the second moving component 7 is set to match the heat treatment parameters of the shaft part 10.

[0036] As Figure 1 As shown in the figure, the shield component 6 includes a top plate 601, long side curtains 602, and end side plates 603. The top plate 601 is arranged on the top of the first frame body 1. One set of end side plates 603 is arranged at each of the left and right side ends. Long side curtains 602 are arranged on the outer side surface of the first frame body 1. The top plate 601 and the end side plates 603 are made of transparent plates, and the long side curtains 602 are made of transparent soft material curtains, which is convenient for observing the operation of the machine tool and performing maintenance and debugging in a timely manner.

[0037] As Figure 2As shown, first, the second moving component 7 drives the quenching device 8 to run to the fixed clamping component 4, that is, the initial position of the induction coil 801 is sleeved on the first top pin shaft 404. Next, the shaft part 10 is placed on the clamping and rotating device: the clamping process hole 1001 on one side of the shaft part 10 is correspondingly arranged with the tapered shaft at the end of the first top pin shaft 404 arranged on the fixed clamping component 4, and the clamping process hole 1001 on the other side of the shaft part 10 is correspondingly arranged with the tapered shaft 5053 at the end of the second top pin shaft 505 arranged on the moving clamping component 5. The first motor 301 is started to drive the moving clamping component 5 to move in the direction of the fixed clamping component 4. The first top pin shaft 404 and the second top pin shaft 505 clamp the shaft part 10. At the same time, the guide pin 910 arranged on the pressure sensor component 9 abuts against the bottom of the clamping process hole 1001, and the pressure value range of the pressure sensor 903 is set to determine the clamping state of the shaft part 10. After the shaft part 10 is clamped, the second motor 402 arranged on the fixed clamping component 4 is started, and the output shaft of the second motor 402 rotates. The shaft part 10 performs a circular rotational motion. At the same time, the quenching device 8 is started, and the second moving component 7 drives the quenching device 8 to move horizontally along the length direction of the shaft part 10, and the induction coil 801 performs heat treatment operations on the shaft part 10. The moving speed of the quenching device 8 and the rotational speed of the shaft part 10 need to be set according to the parameters set for the surface heat treatment effect of the shaft part 10. After the heat treatment operation is completed, the quenching device 8 stops working, the second motor 402 stops running, the second moving component 7 moves the quenching device 8 to the fixed clamping component 4, the induction coil 801 returns to the initial position, the first moving component 3 drives the moving clamping component 5 to move, releases the shaft part 10, removes the shaft part 10, and transports it to the next work station. Clamp a new shaft part 10 to be heat treated and repeat the above process for heat treatment operations.

Claims

1. A surface heat treatment device for large-diameter shaft parts, comprising a first frame (1) and a second frame (2), characterized in that: The first frame body (1) and the second frame body (2) are arranged side by side in the length direction. A clamping and rotating device is arranged on the first frame body (1). The clamping and rotating device includes a first moving component (3), a fixed clamping component (4), and a moving clamping component (5). The moving clamping component (5) is arranged on the opposite surface of the fixed clamping component (4). A shaft part (10) is clamped between the fixed clamping component (4) and the moving clamping component (5). A first moving component (3) is arranged below the moving clamping component (5). The first moving component (3) is arranged on the first frame body (1). The first moving component (3) includes a synchronous belt and lead screw transmission component and a linear guide rail component. A moving quenching device is arranged on the second frame body (2). The moving quenching device includes a second moving component (7) and a quenching device (8). The second moving component (7) is fixedly arranged on the second frame body (2). The second moving component (7) includes a lead screw transmission component and a linear guide rail component. The quenching device (8) is fixedly arranged on the second moving component (7). A pressure sensor component (9) is further arranged on the moving clamping component (5). A protective cover component (6) is arranged on the clamping and rotating device. A water tank (11) is arranged below the clamping and rotating device. The water tank (11) is fixedly arranged on the first frame body (1).

2. The surface heat treatment device for large-diameter shaft parts according to claim 1, characterized in that: The fixed clamping component (4) includes a base (401), a second motor (402), a clamping claw disc (403), and a first top pin shaft (404). The base (401) is horizontally arranged above the first frame body (1) and is arranged at one end of the side of the first moving component (3). A second motor (402) is arranged on the base (401). A clamping claw disc (403) is fixedly arranged at the output shaft end of the second motor (402). A first top pin shaft (404) is clamped at the end of the clamping claw disc (403). One end of the first top pin shaft (404) is a cylindrical shaft, and the other end is a tapered shaft.

3. The surface heat treatment device for large-diameter shaft parts according to claim 2, wherein: The moving clamping component (5) includes a mounting bottom plate (501), a support frame (502), a bearing cylinder (503), a rotating shaft (504), a bearing (506), and a shaft sleeve (507). The mounting bottom plate (501) is fixedly arranged on the first moving component (3). A support frame (502) is arranged on the mounting bottom plate (501). A bearing cylinder (503) is arranged on the support frame (502). A bearing (506) is sleeved inside the bearing cylinder (503). A rotating shaft (504) is inserted into the bearing hole of the bearing (506). One end of the rotating shaft (504) is provided with an end cover (5041), and a shaft sleeve (507) is sleeved on the other end. The end cover (5041) faces the fixed clamping component (4). A second top pin shaft (505) is arranged on the end cover (5041). The second top pin shaft (505) is arranged opposite to the first top pin shaft (404) to cooperate with clamping the shaft part (10).

4. A surface heat treatment device for large-diameter shaft parts according to claim 3, characterized in that: The second top pin shaft (505) includes a cylindrical shaft (5052). One end of the cylindrical shaft (5052) is provided with a mounting flange (5051), and the mounting flange (5051) is fixedly arranged on the end cover (5041). The other end of the cylindrical shaft (5052) is provided with a tapered shaft (5053). A cylindrical cavity (5054) is also arranged inside the cylindrical shaft (5052). A guide pin hole (5055) is arranged through the second top pin shaft (505) along the central axis.

5. The surface heat treatment device for large-diameter shaft parts according to claim 4, characterized in that: The pressure sensor assembly (9) is arranged inside the cylindrical cavity (5054). The pressure sensor assembly (9) includes a first mounting block (901), a connecting plate (902), a pressure sensor (903), a second mounting block (904), a screw (905), a second linear guide rail set (906), a support fixing seat (907), a spring (909), and a guide pin (910). The first mounting block (901) is fixedly arranged on the end cover (5041). The pressure sensor (903) is passed through the first mounting block (901). The sensing head of the pressure sensor (903) faces the inner side of the cylindrical cavity (5054). A connecting plate (902) is arranged below the first mounting block (901). The second mounting block (904) is arranged in parallel in front of the first mounting block (901). The second mounting block (904) is fixedly arranged on the connecting plate (902). The screw (905) is slidably passed through the second mounting block (904). The screw head of the screw (905) faces the sensing head of the pressure sensor (903). A second linear guide rail set (906) is arranged in front of the second mounting block (904). The second linear guide rail set (906) is fixedly arranged on the connecting plate (902). The support fixing seat (907) is fixedly arranged on the slider of the second linear guide rail set (906). The screw (905) is screwed and fixed on the support fixing seat (907). The spring (909) is sleeved on the rod (905) and is arranged between the support fixing seat (907) and the second mounting block (904). The end of the screw (905) is inserted with a guide pin (910). The guide pin (910) is passed through the guide pin hole (5055) and extends out of the end face of the tapered shaft (5053).

6. The surface heat treatment device for large-diameter shaft parts according to claim 4, characterized in that: Clamping process holes (1001) are arranged on both end faces of the shaft part (10). The sizes of the tapered shaft ends of the first top pin shaft (404) and the second top pin shaft (505) are matched with the aperture sizes of the clamping process holes (1001). The tapered shaft ends of the first top pin shaft (404) and the second top pin shaft (505) are top-mounted inside the clamping process holes (1001) to clamp the shaft part (10).

7. A surface heat treatment device for large-diameter shaft parts according to claim 3, characterized in that: The rotating shaft (504) is provided with a through wire hole (5042) along the axis.

8. The surface heat treatment device for large-diameter shaft parts according to claim 2, characterized in that: The shaft diameter of the cylindrical shaft of the first top pin shaft (404) is matched with the clamping range of the clamping jaw disc (403).

9. The surface heat treatment device for large-diameter shaft parts according to claim 1, characterized in that: The shield assembly (6) includes a top plate (601), long side curtains (602), and end side plates (603). The top plate (601) is disposed on the top of the first frame body (1). A set of end side plates (603) are respectively disposed at the left and right ends of the first frame body (1). Long side curtains (602) are disposed on the outer side surfaces of the first frame body (1). The top plate (601) and the end side plates (603) are made of transparent plates, and the long side curtains (602) are made of transparent soft material curtains.

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