Carburizing and quenching device for processing inner gear ring

Abstract

The utility model discloses a carburizing and quenching device for inner gear ring processing belongs to carburizing and quenching device technical field, aims at solving the lack of accurate clamping and positioning of the existing device to inner gear ring, leading to the problem of inner gear ring carburizing and quenching easy to appear deformation, carburizing uneven. The device includes the connecting disc, is equipped with the positioning taper column, the tooth cylinder, the clamping rod, the traction mechanism on the connecting disc, and the clamping rod inside is equipped with the interval block and the spring. Form the inner support to inner gear ring through the positioning taper column cooperation bolt fixed tooth cylinder, and the traction mechanism can drive the clamping rod synchronous regulation interval to realize the outer clamping, and the interval block realizes the layered support of inner gear ring, and the spring is then elastic adaptation different specifications inner gear ring. The device can offset the thermal stress and organizational stress when inner gear ring carburizing and quenching, reduce deformation, guarantee carburizing uniformity, adapt to a variety of specifications inner gear ring, convenient operation, effectively improve inner gear ring processing precision and efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of carburizing and quenching equipment, specifically a carburizing and quenching equipment for machining internal gear rings. Background Technology

[0002] Internal gear rings are core components of mechanical transmission systems, widely used in engineering machinery, new energy equipment, and precision transmission devices. Their surface hardness, wear resistance, and dimensional accuracy directly affect the overall transmission efficiency and service life. Carburizing and quenching are key processes for improving the surface performance of internal gear rings. However, during the drastic temperature changes of high-temperature carburizing and rapid quenching, internal gear rings are prone to deformation problems such as ellipticity, warping, and end runout due to uneven thermal stress and structural stress, which seriously affects machining accuracy and product qualification rate.

[0003] In existing technologies, such as the thin-walled internal gear ring carburizing and quenching device with national authorized patent announcement number CN214937694U, the outer shell tilt is limited only by support rods and springs, lacking a precise clamping and positioning structure for the internal gear ring, and thus cannot suppress deformation at the source. During processing, the internal gear ring is prone to deformation due to uneven stress, and the carburized layer of the internal gear ring in the same furnace has a large difference in surface hardness, resulting in poor deformation consistency, high subsequent rework rate and scrap rate, and making it difficult to meet the accuracy and stability requirements of batch processing of internal gear rings. Summary of the Invention

[0004] The purpose of this invention is to provide a carburizing and quenching device for machining internal gear rings, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A carburizing and quenching device for machining internal gear rings includes a connecting plate; a positioning cone is fixedly mounted on the upper surface of the connecting plate, the outer surface of the positioning cone is adapted for mounting a gear cylinder, and a first wing bolt is screwed into the positioning cone to lock and fix the gear cylinder; guide rail grooves are opened at all four ends of the upper surface of the connecting plate, and guide rail blocks are slidably mounted in the guide rail grooves; clamping rods are fixedly mounted on the upper surface of the guide rail blocks, and the four sets of clamping rods can jointly clamp the outer surface of the internal gear ring to be carburized and quenched, and in the clamping state, the protruding teeth of the internal gear ring and the outer surface of the gear cylinder are arranged opposite each other, and a carburizing gap is reserved for the flow of carburizing medium; a traction column is fixedly mounted on the lower surface of the guide rail blocks, the traction column is slidably mounted in a traction mechanism, and the traction mechanism is rotatably mounted on the inner lower surface of the connecting plate.

[0006] Preferably, each of the four sets of clamping rods has a heat insulation groove on one inner end, and a spacer block is slidably fitted in the heat insulation groove so that the distance between each pair of spacer blocks is suitable for supporting a set of internal gear rings; the surface of the spacer block is a trapezoidal inclined surface.

[0007] Preferably, each clamp rod is equipped with a spring in its heat insulation groove, and the two ends of the spring are respectively fixedly connected to one end of the heat insulation groove and one end of the spacer block, so that the spring can apply an outward spring force to the spacer block.

[0008] Preferably, the traction mechanism includes a turntable, which is rotatably mounted on the inner lower surface of the connecting plate; the upper surface of the turntable is provided with traction grooves at all four ends, and the traction grooves are suitable for the sliding assembly of the traction column.

[0009] Preferably, a lever is fixedly mounted on one end of the outer surface of the turntable, and the lever slides through and extends out from the protrusion; the protrusion is fixedly mounted on one end of the outer surface of the connecting plate.

[0010] Preferably, the upper surface of the protrusion has an arc-shaped opening, which is suitable for the sliding assembly of the threaded portion of the second wing bolt; the second wing bolt is threadedly assembled into the actuating rod through the arc-shaped opening.

[0011] Preferably, the tooth shape of the convex teeth on the outer surface of the gear cylinder is adapted to the tooth shape of the inner tooth of the inner gear ring to be carburized and quenched, and the distance between the tooth tip of the convex teeth and the tooth root of the inner tooth of the inner gear ring is not less than 1 / 2 of the carburizing distance.

[0012] Preferably, the clamping rod for holding the inner sidewall of the internal gear ring and the spacer block for supporting the top surface of the internal gear ring are both coated with a high-temperature resistant and anti-adhesion coating; the high-temperature resistant and anti-adhesion coating is a polytetrafluoroethylene coating or a ceramic-based coating, and the coating thickness is 50-150μm, which is suitable for the high-temperature environment requirements of the carburizing and quenching process, so as to reduce the risk of high-temperature adhesion between the internal gear ring and the clamping rod and the spacer block.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. Deformation control effect: Through the bidirectional constraint of the inner support of the gear cylinder and the outer clamping of the clamping rod, the thermal stress and structural stress generated by temperature changes during carburizing and quenching of the internal gear ring can be effectively offset, significantly reducing deformation problems such as ellipticity, warping, and end runout, and ensuring the dimensional accuracy and tooth profile consistency of the internal gear ring; at the same time, the turntable drives the clamping rod to adjust synchronously, avoiding additional deformation caused by uneven clamping force.

[0014] Carburizing uniformity effect: The carburizing gap reserved between the inner gear ring and the toothed cylinder ensures smooth flow of the carburizing medium, allowing the inner and outer surfaces of the inner gear ring to fully contact the medium, improving the uniformity of carburizing layer depth and surface hardness; the spacer block enables multiple sets of inner gear rings to be placed in layers, avoiding uneven heating and insufficient carburizing caused by stacking, further ensuring the consistency of the processing quality of gear rings in the same furnace.

[0015] Adaptability and ease of operation: The gear cylinder can be replaced according to the specifications of the internal gear ring, and the clamping rod can be quickly adjusted in distance through the pulling mechanism. With the elastic adaptation of the trapezoidal inclined surface of the spacer block and the spring, the device can be adapted to different specifications of internal gear rings. The design of the toggle rod and the wing bolt allows clamping and adjustment to be completed without complicated tools, simplifying the operation process and improving the efficiency of batch processing.

[0016] Stability and surface quality: The convex blocks and the second butterfly bolts lock the turntable to prevent the clamping rod from loosening during processing and ensure clamping stability; the high-temperature resistant and anti-adhesion coating on the clamping rod and the spacer blocks prevents the internal gear ring from sticking to the parts at high temperatures, reduces surface damage to the internal gear ring, lowers the rework rate, and further ensures the surface quality and processing reliability of the internal gear ring. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the carburizing and quenching device for machining internal gear rings according to this utility model. Figure 2 This is a schematic diagram of the structure of the toothed cylinder and the first wing bolt of this utility model; Figure 3 This is a schematic diagram of the structure of the clamping rod and the spacer block of this utility model; Figure 4 This is a schematic diagram of the traction mechanism of this utility model.

[0018] In the diagram: 1. Connecting disc; 101. Gear cylinder; 102. First wing bolt; 103. Clamping rod; 104. Protrusion; 105. Arc bend; 106. Guide rail block; 107. Traction column; 108. Spacer block; 109. Positioning cone column; 110. Guide rail groove; 111. Spring; 2. Pulling mechanism; 201. Turntable; 202. Traction groove; 203. Actuating rod; 204. Second wing bolt. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4This embodiment provides a carburizing and quenching device for machining internal gear rings, including a connecting plate 1; a positioning cone 109 is fixedly mounted on the upper surface of the connecting plate 1, the outer surface of the positioning cone 109 is suitable for the gear cylinder 101 to be sleeved and installed, and a first wing bolt 102 is screwed into the positioning cone 109 to lock and fix the gear cylinder 101; guide rail grooves 110 are opened at all four ends of the upper surface of the connecting plate 1, and guide rail blocks 106 are slidably mounted in the guide rail grooves 110. The upper surface of the guide block 106 is fixedly equipped with clamping rods 103. The four sets of clamping rods 103 can jointly clamp the outer surface of the inner gear ring to be carburized and quenched. In the clamping state, the convex teeth of the inner gear ring and the outer surface of the gear cylinder 101 are arranged opposite to each other, and a carburizing gap is reserved for the flow of carburizing medium. The lower surface of the guide block 106 is fixedly equipped with a traction column 107. The traction column 107 is slidably assembled in the traction mechanism 2. The traction mechanism 2 is rotatably assembled on the inner lower surface of the connecting plate 1.

[0021] In this design, the positioning cone 109 provides an installation reference for the gear cylinder 101. Together with the first wing bolt 102, it stably fixes the gear cylinder 101 onto the connecting plate 1, thus providing internal support for the internal gear ring. The traction mechanism 2 can drive the guide block 106 to slide along the guide groove 110 via the traction column 107, thereby driving the four sets of clamping rods 103 to synchronously adjust their spacing, achieving joint clamping of the outer surfaces of internal gear rings of different specifications, forming external constraints. Through the bidirectional action of the internal support of the gear cylinder 101 and the external clamping of the clamping rods 103, the thermal stress and structural stress generated by the drastic temperature changes during carburizing and quenching of the internal gear ring can be effectively offset, significantly reducing deformation problems such as ellipticity, warping, and end runout of the internal gear ring. Simultaneously, the opposing teeth on the outer surface of the internal gear ring and the gear cylinder 101, with a reserved carburizing gap, ensure smooth flow of the carburizing medium, allowing both the inner and outer surfaces of the internal gear ring to fully contact the carburizing medium, improving carburizing uniformity, and further ensuring the dimensional accuracy and tooth profile consistency of the internal gear ring.

[0022] Specifically, in this embodiment, each of the four sets of clamping rods 103 has a heat insulation groove on one inner end, and a spacer block 108 is slidably fitted in the heat insulation groove so that the distance between each pair of spacer blocks 108 is suitable for supporting a set of internal gear rings; the surface of the spacer block 108 is trapezoidal inclined. In this solution, the heat insulation groove on the inner side of the clamping rod 103 can reduce the heat transfer from the clamping rod 103 to the spacer block 108 during the carburizing and quenching process, and prevent the spacer block 108 from affecting the support stability due to overheating; the trapezoidal inclined surface design of the spacer block 108 can adapt to the shape of internal gear rings of different specifications, so that the spacer block 108 can stably support the internal gear rings; at the same time, each pair of spacer blocks 108 supports a set of internal gear rings, realizing the orderly layering of multiple sets of internal gear rings, avoiding problems such as uneven heating and insufficient carburizing caused by stacking of internal gear rings, further ensuring the positional stability of each set of internal gear rings during processing, and reducing deformation or carburizing differences caused by improper placement.

[0023] Specifically, in this embodiment, springs 111 are installed in the heat insulation grooves of the clamping rods 103. The two ends of the springs 111 are fixedly connected to one end of the heat insulation groove and one end of the spacer block 108, respectively, so that the springs 111 can apply an outward spring force to the spacer block 108. In this solution, the springs 111 in the heat insulation groove apply an outward spring force to the spacer block 108, which can make the spacer block 108 fit tightly against the outer surface of the internal gear ring. Even if there are slight differences in the specifications of the internal gear ring, the elastic adjustment of the springs 111 can maintain stable support and limitation, and prevent the internal gear ring from displacing due to vibration and stress changes during carburizing and quenching. At the same time, the elastic action of the springs 111, combined with the trapezoidal inclined surface of the spacer block 108, further expands the adaptability range of the device to internal gear rings of different specifications, ensuring that the internal gear rings placed in layers can be reliably constrained, and reducing processing errors caused by unstable support.

[0024] Specifically, in this embodiment, the traction mechanism 2 includes a turntable 201, which is rotatably mounted on the lower inner surface of the connecting plate 1. Traction grooves 202 are provided at all four ends of the upper surface of the turntable 201, and the traction grooves 202 are suitable for the sliding assembly of the traction column 107. In this scheme, when the turntable 201 of the traction mechanism 2 rotates, the traction grooves 202 on its surface generate radial thrust on the traction column 107 through the groove walls, driving the four sets of guide rail blocks 106 to slide synchronously along the guide rail grooves 110, thereby achieving synchronous opening and closing of the four sets of clamping rods 103. This synchronous adjustment method ensures that the clamping rods 103 are centered and clamp the internal gear ring, avoiding uneven clamping force on the internal gear ring due to asynchronous adjustment of the clamping rods 103, which could cause additional deformation. Simultaneously, through the cooperation of the turntable 201 and the traction grooves 202, the rotational motion is converted into radial movement of the clamping rods 103, simplifying the structure and operation of the clamping rod spacing adjustment and improving the device's adaptability to internal gear rings of different specifications.

[0025] Specifically, in this embodiment, a lever 203 is fixedly mounted on one end of the outer surface of the turntable 201. The lever 203 extends through and slides out from the protrusion 104; the protrusion 104 is fixedly mounted on one end of the outer surface of the connecting plate 1. In this solution, the lever 203 on the outer surface of the turntable 201 provides a convenient point of force application for the operator. Without the need for complex tools, the turntable 201 can be rotated by moving the lever 203, simplifying the adjustment operation of the pulling mechanism 2. The protrusion 104 guides and limits the sliding and rotation of the lever 203, preventing the lever 203 from deviating during the adjustment process, ensuring the smooth rotation of the turntable 201, and thus ensuring the synchronicity and stability of the guide rail block 106 and the clamping rod 103 during adjustment, avoiding the clamping and positioning deviation of the clamping rod 103 due to the deviation of the lever 203.

[0026] Specifically, in this embodiment, the upper surface of the protrusion 104 is provided with an arc-shaped opening 105, which is suitable for the sliding assembly of the threaded portion of the second wing bolt 204. The second wing bolt 204 is threadedly assembled into the actuating rod 203 through the arc-shaped opening 105. In this solution, the arc-shaped opening 105 on the protrusion 104 provides a reasonable stroke for the rotation of the actuating rod 203, which can adapt to the adjustment requirements of different spacings of the clamping rod 103 and meet the clamping requirements of different specifications of internal gear rings. The second wing bolt 204 is threadedly installed on the actuating rod 203 through the arc-shaped opening 105. After tightening, it can fix the actuating rod 203 on the protrusion 104, thereby locking the position of the turntable 201 and preventing the turntable 201 from rotating unexpectedly due to vibration, temperature changes, or other factors during the carburizing and quenching process, which would cause the clamping rod 103 to loosen. This ensures that the internal gear ring is always in a stable clamping state and reduces deformation or displacement caused by loose clamping.

[0027] Specifically, in this embodiment, the tooth shape of the protruding teeth on the outer surface of the gear cylinder 101 is adapted to the tooth shape of the inner tooth of the inner gear ring to be carburized and quenched, and the distance between the tooth tip of the protruding teeth and the tooth root of the inner tooth of the inner gear ring is not less than 1 / 2 of the carburizing distance. In this solution, the tooth shape of the protruding teeth on the outer surface of the gear cylinder 101 is adapted to the tooth shape of the inner tooth of the inner gear ring, which makes the protruding teeth of the gear cylinder 101 fit the inner tooth structure of the inner gear ring more closely, providing a more uniform internal support force for the inner gear ring and avoiding deformation caused by uneven local stress on the inner gear ring; at the same time, the reasonable distance between the tooth tip of the protruding teeth and the tooth root of the inner tooth of the inner gear ring, together with the reserved carburizing distance, can ensure that the carburizing medium can fully flow to the inner tooth area of ​​the inner gear ring, making the carburized layer on the inner and outer surfaces of the inner gear ring more uniform, improving the surface hardness consistency and tooth shape quality of the inner gear ring.

[0028] Specifically, in this embodiment, the clamping rod 103, which is used to clamp the inner sidewall of the internal gear ring, and the spacer block 108, which is used to support the top surface of the internal gear ring, are both coated with a high-temperature resistant and anti-adhesion coating. The high-temperature resistant and anti-adhesion coating is a polytetrafluoroethylene coating or a ceramic-based coating, and the coating thickness is 50-150μm, which is suitable for the high-temperature environment requirements of the carburizing and quenching process, so as to reduce the risk of high-temperature adhesion between the internal gear ring and the clamping rod 103 and the spacer block 108. In this design, the clamping rod 103 is used to clamp the inner wall of the internal gear ring, and the spacer block 108 is used to support the top surface of the internal gear ring. The high-temperature resistant and anti-adhesion coating can resist the high-temperature environment of carburizing and quenching, preventing the clamping rod 103 and the spacer block 108 from sticking to the internal gear ring at high temperatures, thus reducing damage to the surface of the internal gear ring caused by adhesion. At the same time, the coating does not affect the clamping stability of the clamping rod 103 or the supporting effect of the spacer block 108, ensuring that the internal gear ring can be smoothly removed from the device after processing, reducing the rework rate caused by adhesion, and further ensuring the surface quality of the internal gear ring.

[0029] Working principle: This device uses the connecting disc 1 as the basic load-bearing structure, and achieves precise machining of the internal gear ring through the synergistic effect of "internal support + external clamping + synchronous adjustment": 1. Internal support positioning: The positioning cone 109 on the upper surface of the connecting plate 1 provides an installation reference for the gear cylinder 101. The first wing bolt 102 locks the gear cylinder 101 onto the positioning cone 109. The protruding teeth on the outer surface of the gear cylinder 101 are opposite to the inner teeth of the inner gear ring, forming an internal support for the inner gear ring and providing radial positioning for the inner gear ring, thus preventing deformation of the inner side of the inner gear ring due to lack of constraint.

[0030] External clamping adjustment: The guide rail groove 110 of the connecting plate 1 provides a sliding path for the guide rail block 106. The guide rail block 106 connects the clamping rod 103 and the traction column 107. When the turntable 201 of the traction mechanism 2 rotates, the traction groove 202 on its surface pushes the traction column 107 through the groove wall, causing the guide rail block 106 to slide synchronously along the guide rail groove 110, thereby enabling the four sets of clamping rods 103 to open and close synchronously, achieving uniform clamping of the outer surface of the internal gear ring and forming external constraint.

[0031] Layered support and elastic adaptation: The heat insulation groove on the inner side of the clamping rod 103 reduces heat transfer. The spacer block 108 in the groove adapts to different specifications of internal gear rings through the trapezoidal inclined surface. With the outward pushing force of the spring 111, the spacer block 108 fits tightly against the internal gear ring, realizing layered support of multiple sets of internal gear rings and avoiding uneven heating caused by stacking. At the same time, the spring 111 can compensate for slight differences in the specifications of the internal gear rings and maintain stable constraint.

[0032] Carburizing and anti-adhesion protection: A pre-reserved carburizing gap is provided between the inner gear ring and the toothed cylinder 101 to ensure smooth flow of the carburizing medium and to allow the inner and outer surfaces of the inner gear ring to fully contact the medium; the high-temperature resistant anti-adhesion coating on the clamping surface of the clamping rod 103 and the supporting surface of the spacer block 108 resists the high temperature of carburizing and quenching and prevents the inner gear ring from sticking to the component.

[0033] Structural locking: The arc-shaped bend 105 on the protrusion 104 provides rotational stroke for the actuating rod 203. The second wing bolt 204 locks the position of the actuating rod 203, thereby fixing the turntable 201, preventing the clamping rod 103 from loosening during processing, and ensuring the stability of clamping and support.

[0034] How to use: 1. Gear cylinder selection and fixing: According to the specifications of the internal gear ring to be processed, select a gear cylinder 101 that matches the outer surface convex teeth, put the gear cylinder 101 on the positioning cone 109, and tighten the first wing bolt 102 to make the gear cylinder 101 stably fixed on the connecting plate 1.

[0035] Clamping rod spacing adjustment: Loosen the second butterfly bolt 204 on the protrusion 104, move the lever 203 outside the turntable 201, and drive the turntable 201 to rotate on the lower surface of the connecting plate 1; the traction groove 202 of the turntable 201 pushes the traction column 107, so that the guide block 106 slides along the guide groove 110, thereby adjusting the spacing of the four sets of clamping rods 103 until it matches the specifications of the internal gear ring to be processed.

[0036] Internal gear ring clamping: Insert the internal gear ring from above the clamping rod 103. The internal gear ring pushes the spacer block 108 to compress the spring 111 until the internal gear ring falls between the two sets of spacer blocks 108. Repeat the operation to place multiple sets of internal gear rings in layers between the corresponding spacer blocks 108, ensuring that the inner side of each set of internal gear rings is opposite to the convex teeth of the gear cylinder 101.

[0037] Structural locking and machining: After confirming that the internal gear ring is clamped in place, tighten the second wing bolt 204, lock the lever 203 through the arc bend 105, and fix the position of the turntable 201 and the clamping rod 103; send the entire device into the carburizing and quenching equipment, start the process, and after machining is completed, take out the device, loosen the second wing bolt 204 and the first wing bolt 102, and remove the internal gear ring and the gear cylinder 101.

[0038] Technical effects: 1. Deformation control effect: Through the bidirectional constraint of the inner support of the gear cylinder 101 and the outer clamping of the clamping rod 103, the thermal stress and structural stress generated by temperature changes during carburizing and quenching of the internal gear ring can be effectively offset, significantly reducing deformation problems such as ellipticity, warping, and end runout, and ensuring the dimensional accuracy and tooth profile consistency of the internal gear ring; at the same time, the turntable 201 drives the clamping rod 103 to adjust synchronously, avoiding additional deformation caused by uneven clamping force.

[0039] Uniform carburizing effect: The carburizing gap reserved between the inner gear ring and the toothed cylinder 101 ensures smooth flow of the carburizing medium, allowing the inner and outer surfaces of the inner gear ring to fully contact the medium, thus improving the uniformity of the carburizing layer depth and surface hardness; the spacer block 108 enables multiple sets of inner gear rings to be placed in layers, avoiding uneven heating and insufficient carburizing caused by stacking, and further ensuring the consistency of the processing quality of gear rings in the same furnace.

[0040] Adaptability and ease of operation: The gear cylinder 101 can be replaced according to the specifications of the internal gear ring. The clamping rod 103 can quickly adjust the spacing through the pulling mechanism 2. With the elastic adaptation of the trapezoidal inclined surface of the spacer block 108 and the spring 111, the adaptability range of the device to internal gear rings of different specifications is widened. The design of the actuating rod 203 and the wing bolts (102, 204) can complete the clamping and adjustment without complicated tools, simplifying the operation process and improving the efficiency of batch processing.

[0041] Stability and surface quality effects: The protrusion 104 and the second butterfly bolt 204 lock the turntable 201 to prevent the clamping rod 103 from loosening during processing and ensure clamping stability; the high-temperature resistant and anti-adhesion coating of the clamping rod 103 and the spacer block 108 prevents the internal gear ring from sticking to the parts at high temperatures, reduces surface damage to the internal gear ring, reduces the rework rate, and further ensures the surface quality and processing reliability of the internal gear ring.

[0042] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A carburizing and quenching apparatus for machining internal gear rings, characterized in that, Includes a connecting plate (1); a positioning cone (109) is fixedly mounted on the upper surface of the connecting plate (1), the outer surface of the positioning cone (109) is suitable for the gear cylinder (101) to be sleeved and installed, and is screwed into the positioning cone (109) by a first wing bolt (102) to lock and fix the gear cylinder (101); guide rail grooves (110) are provided at all four ends of the upper surface of the connecting plate (1), and guide rail blocks (106) are slidably mounted in the guide rail grooves (110); the guide rail blocks (106) are fixedly mounted on the upper surface of the connecting plate (1) to ... The upper surface of the guide block (106) is fixedly equipped with clamping rods (103). The four sets of clamping rods (103) can jointly clamp the outer surface of the inner gear ring to be carburized and quenched. In the clamping state, the inner gear ring and the convex teeth on the outer surface of the gear cylinder (101) are arranged opposite to each other, and a carburizing gap is reserved for the flow of carburizing medium. The lower surface of the guide block (106) is fixedly equipped with a traction column (107). The traction column (107) is slidably assembled in the traction mechanism (2). The traction mechanism (2) is rotatably assembled on the inner lower surface of the connecting plate (1).

2. The carburizing and quenching apparatus for machining internal gear rings according to claim 1, characterized in that, Each of the four sets of clamping rods (103) has a heat insulation groove on one end of its inner side. A spacer block (108) is slidably fitted in the heat insulation groove so that the distance between each pair of spacer blocks (108) is suitable for supporting a set of internal gear rings. The surface of the spacer block (108) is a trapezoidal inclined surface.

3. The carburizing and quenching apparatus for machining internal gear rings according to claim 2, characterized in that, Each clamp (103) is equipped with a spring (111) in the heat insulation groove. The two ends of the spring (111) are fixedly connected to one end of the heat insulation groove and one end of the spacer (108), so that the spring (111) can apply an outward spring force to the spacer (108).

4. The carburizing and quenching apparatus for machining internal gear rings according to claim 1, characterized in that, The traction mechanism (2) includes a turntable (201), which is rotatably mounted on the inner lower surface of the connecting plate (1); the upper surface of the turntable (201) is provided with traction grooves (202) at all four ends, and the traction grooves (202) are suitable for the traction column (107) to slide.

5. The carburizing and quenching apparatus for machining internal gear rings according to claim 4, characterized in that, A lever (203) is fixedly mounted on one end of the outer surface of the turntable (201). The lever (203) slides through and extends out from the protrusion (104). The protrusion (104) is fixedly mounted on one end of the outer surface of the connecting plate (1).

6. The carburizing and quenching apparatus for machining internal gear rings according to claim 5, characterized in that, The upper surface of the protrusion (104) is provided with an arc-shaped opening (105), and the arc-shaped opening (105) is suitable for the sliding assembly of the threaded part of the second wing bolt (204); the second wing bolt (204) is threadedly assembled into the lever (203) through the arc-shaped opening (105).

7. A carburizing and quenching apparatus for machining internal gear rings according to any one of claims 1-6, characterized in that, The tooth shape of the convex tooth on the outer surface of the tooth cylinder (101) is adapted to the tooth shape of the inner tooth of the inner tooth ring to be carburized and quenched, and the distance between the tooth tip of the convex tooth and the tooth root of the inner tooth of the inner tooth ring is not less than 1 / 2 of the carburizing distance.

8. The carburizing and quenching apparatus for machining internal gear rings according to claim 2, characterized in that, The clamping rod (103) for clamping the inner sidewall of the internal gear ring and the spacer block (108) for supporting the top surface of the internal gear ring are both coated with a high-temperature resistant and anti-adhesion coating. The high-temperature resistant and anti-adhesion coating is a polytetrafluoroethylene coating or a ceramic-based coating, and the coating thickness is 50-150μm, which is suitable for the high-temperature environment requirements of the carburizing and quenching process, so as to reduce the risk of high-temperature adhesion between the internal gear ring and the clamping rod (103) and the spacer block (108).

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