High-frequency quenching auxiliary tool

Abstract

The invention discloses a high-frequency quenching auxiliary tool, and relates to the technical field of heat treatment auxiliary tools, the high-frequency quenching auxiliary tool comprises a main rod which is divided into a large-diameter rod section and a small-diameter rod section which are coaxial in the axial direction, and a first conical part is arranged at one end, away from the large-diameter rod section, of the small-diameter rod section and used for being inserted into a center hole of a main shaft; the conical surface of the large-diameter rod section is in contact with the orifice part of the center hole to realize guiding, and a second conical part is arranged at the joint of the small-diameter rod section and the large-diameter rod section and used for abutting against the edge of the orifice of the center hole; the movable sleeve is coaxially arranged outside the main rod in a sleeving mode and can slide in the axial direction of the main rod; the elastic piece is arranged between the movable sleeve and one end, far away from the small-diameter rod section, of the large-diameter rod section and is used for providing axial pre-tightening force for the movable sleeve to enable the movable sleeve to face the small-diameter rod section; when the second conical part abuts against the edge of the hole opening of the center hole, the movable sleeve tightly presses the end face of the main shaft under the action of the elastic piece. The high-frequency quenching auxiliary tool can limit the radial and axial runout of the main shaft during quenching rotation so as to ensure the quenching uniformity.

Description

Technical Field

[0001] This invention relates to the field of heat treatment auxiliary tools, and more specifically, to a high-frequency quenching auxiliary tooling. Background Technology

[0002] Due to space constraints within the engine, when component installation is difficult, it is necessary to manufacture components into separate structures, install them individually into the engine, and then assemble them together to achieve the desired performance and effect. As the core rotating component in such a separate structure, the spindle's end annular surface (e.g., the friction surface requiring reinforcement for bolt installation or torque transmission) and the R-angle area at the transition section bear significant assembly stress, resulting in a weak structure. Therefore, the spindle's end annular surface and R-angle area require high-frequency quenching to improve their surface hardness and wear resistance, ensuring the assembled separate structure is robust and reliable.

[0003] Currently, when performing high-frequency quenching on split spindles, traditional auxiliary tooling typically relies on the cylindrical surface of the spindle's inner bore for positioning. However, due to coaxiality errors between the inner bore and other reference surfaces during spindle machining, and because the tooling and the inner bore often have clearance or transition fits, this positioning method amplifies the original errors. This results in a significant increase in radial runout of the spindle during quenching rotation. Furthermore, existing tooling lacks a clamping mechanism for the spindle end face, failing to constrain axial runout. This causes the distance between the quenching equipment and the spindle to continuously change during rotation, leading to uneven heating of the spindle's quenching area, increasing the risk of cracks and causing severe economic losses.

[0004] Therefore, how to solve the problem that the spindle is prone to jumping during high-frequency quenching due to inaccurate positioning of traditional auxiliary tooling, resulting in unstable spindle quenching quality, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a high-frequency quenching auxiliary fixture that provides a stable radial rotation reference and axial constraint, thereby ensuring quenching uniformity.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A high-frequency quenching auxiliary fixture, used for clamping and positioning the spindle during high-frequency quenching, includes:

[0008] The main shaft is divided into a large-diameter section and a small-diameter section along the axial direction. The end of the small-diameter section away from the large-diameter section is provided with a first cone for insertion into the central hole of the main shaft. Its cone surface contacts the opening of the central hole to achieve guidance. The connection between the small-diameter section and the large-diameter section is provided with a second cone for abutting against the edge of the opening of the central hole.

[0009] The movable sleeve is coaxially sleeved outside the main rod and can slide along the axial direction of the main rod;

[0010] An elastic element is disposed between the movable sleeve and the end of the large-diameter rod segment away from the small-diameter rod segment, for providing the movable sleeve with an axial preload force that causes it to move toward the small-diameter rod segment;

[0011] When the second cone abuts against the edge of the central hole, the movable sleeve presses against the end face of the spindle under the action of the elastic element.

[0012] Preferably, the maximum diameter of the first cone is smaller than the diameter of the central hole, and the maximum diameter of the second cone is larger than the diameter of the central hole.

[0013] Preferably, the second cone is a smooth curved surface that forms a line contact with the chamfer of the central hole opening.

[0014] Preferably, one end of the movable sleeve that presses against the end face of the spindle is provided with an annular boss, which is used to wrap around the port of the spindle when the movable sleeve presses against the end face of the spindle.

[0015] Preferably, the side wall of the movable sleeve is provided with an axially extending elongated oval hole, and the large-diameter rod segment is provided with a corresponding pin hole, through which the positioning pin passes and is inserted into the pin hole.

[0016] Preferably, the inner wall of the movable sleeve is provided with an axially extending first guide portion, and the outer wall of the large-diameter rod segment is provided with a corresponding axially extending second guide portion, and the first guide portion and the second guide portion are slidably connected.

[0017] Preferably, the end of the large-diameter rod segment away from the small-diameter rod segment is provided with a base for connecting the elastic element.

[0018] Preferably, the base is threaded to the end of the large-diameter rod segment away from the small-diameter rod segment.

[0019] Preferably, the outer surface of the base is provided with an anti-slip structure.

[0020] Preferably, the base is provided with a mechanical interface for connecting to an external drive device.

[0021] The high-frequency quenching auxiliary fixture provided by this invention allows the operator to connect the large-diameter rod section of the fixture by hand or through an external drive device. The small-diameter rod section is aligned with the center hole of the spindle to be quenched. The fixture is then pushed axially towards the center hole, allowing the first tapered portion of the small-diameter rod section to enter the center hole first. The tapered surface of the first tapered portion contacts the opening of the center hole. Under the guidance of the tapered surface, even with slight alignment deviations, the small-diameter rod section can smoothly slide into the center hole, completing the initial positioning. At this point, the small-diameter rod section has a small radial movement space within the center hole, compensating for misalignment and preventing jamming. Continuing to apply axial pressure pushes the entire fixture further into the spindle until the second tapered portion abuts against and fits against the edge of the center hole opening. The fixture's radial limitation relative to the spindle completes the final positioning. At this point, the main rod cannot be pushed further axially. The operating or driving force continues, and under the axial preload generated by the continuous compression of the elastic element, the movable sleeve begins to slide along the main rod towards the spindle end face until it is pressed against the spindle end face, completing the clamping process. At this point, the second cone engages with the edge of the bore to achieve radial limiting of the spindle, while being pressed by the movable sleeve to achieve axial limiting. Finally, the high-frequency quenching equipment can be started, and the spindle rotates under the clamping of the fixture for uniform quenching. After quenching, the axial force applied to the fixture is removed. Under the restoring force of the elastic element, the movable sleeve first separates from the end face of the spindle, and then the entire fixture can be pulled out of the central hole of the spindle.

[0022] The beneficial effects of this invention are as follows:

[0023] By abutting the second cone against the edge of the central hole, the radial positioning reference is changed from the traditional inner hole surface to the edge of the central hole opening to avoid radial runout of the spindle during quenching rotation. Then, the movable sleeve driven by the elastic element continuously presses against the spindle end face to avoid axial runout of the spindle during quenching rotation. This ensures that the distance between the quenching equipment and the quenching area of ​​the spindle (such as the end annular surface and R angle) remains consistent during high-speed rotation, guaranteeing quenching uniformity.

[0024] During the tooling insertion process, the first cone can initially guide the centering. As it is pressed down, the second cone can automatically abut against the edge of the center hole and be positioned. The elastic force of the movable sleeve is used to automatically clamp the spindle end face, realizing rapid clamping and improving production efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the main rod provided by the present invention;

[0027] Figure 2 A schematic diagram of a high-frequency quenching auxiliary tooling for clamping a spindle provided by the present invention;

[0028] Figure 3 This is a schematic diagram of a high-frequency quenching auxiliary tooling used in this invention to clamp the spindle.

[0029] Figure label:

[0030] 1-Main shaft; 11-Large diameter shaft segment; 111-Second cone; 12-Small diameter shaft segment; 121-First cone;

[0031] 2-Modible sleeve; 3-Elastic element; 4-Octagonal hole; 5-Positioning pin; 6-Base; 7-Main shaft; 71-Center hole; 72-R angle; 73-End annular surface. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The core of this invention is to provide a high-frequency quenching auxiliary tooling that provides a stable radial rotation reference and axial constraint, thereby ensuring quenching uniformity.

[0034] It should be noted that in this embodiment, the orientation or positional relationship indicated by "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0035] Please refer to Figure 1 , Figure 2 and Figure 3 The present invention provides a specific embodiment of a high-frequency quenching auxiliary tooling for clamping and positioning the spindle 7 during high-frequency quenching, including a main rod 1, a movable sleeve 2 and an elastic element 3.

[0036] The main rod 1 is divided into a coaxial large-diameter rod segment 11 and a small-diameter rod segment 12. The end of the small-diameter rod segment 12 away from the large-diameter rod segment 11 is provided with a first cone 121 for insertion into the center hole 71 of the main shaft 7. Its cone surface contacts the opening of the center hole 71 for guidance. The connection between the small-diameter rod segment 12 and the large-diameter rod segment 11 is provided with a second cone 111 for abutting against the edge of the opening of the center hole 71. The movable sleeve 2 is coaxially sleeved on the outside of the main rod 1 and can slide along the axial direction of the main rod 1. The elastic element 3 is provided between the movable sleeve 2 and the end of the large-diameter rod segment 11 away from the small-diameter rod segment 12 for providing the movable sleeve 2 with an axial preload in the direction of the small-diameter rod segment 12. When the second cone 111 abuts against the edge of the opening of the center hole 71, the movable sleeve 2 presses against the end face of the main shaft 7 under the action of the elastic element 3.

[0037] It should be noted that the main rod 1 is coaxially and integrally formed from a large-diameter rod segment 11 and a small-diameter rod segment 12. The bottom end of the small-diameter rod segment 12 is provided with a first tapered portion 121. The maximum diameter of the first tapered portion 121 is smaller than the diameter of the center hole 71 of the main spindle 7. Even if the main spindle 7 and the tooling are initially misaligned, the first tapered portion 121 can smoothly slide into the center hole 71 without interference. Moreover, it is not difficult to imagine that the maximum diameter of the first tapered portion 121 should be consistent with the diameter of the small-diameter rod segment 12, so that after the small-diameter rod segment 12 is inserted into the center hole 71 along with the first tapered portion 121, there is radial movement space between it and the center hole 71. This allows the tooling and the main spindle 7 to have a certain degree of self-adaptive capability to absorb misalignment errors and avoid jamming.

[0038] The diameter of the small-diameter rod segment 12 is smaller than the diameter of the large-diameter rod segment 11. The connection between the top end of the small-diameter rod segment 12 and the bottom end of the large-diameter rod segment 11 forms a second cone 111. The maximum diameter of the second cone 111 is larger than the diameter of the central hole 71 of the spindle 7, so that when the tooling is advanced axially, the second cone 111 cannot pass through the central hole 71, and its cone surface must abut against the edge of the opening of the central hole 71 to complete the final radial positioning.

[0039] When using the high-frequency quenching auxiliary fixture described in the above embodiment, the operator holds or connects the large-diameter rod segment 11 of the fixture to the external drive device, aligns the small-diameter rod segment 12 of the fixture with the center hole 71 of the spindle 7 to be quenched, and then pushes the fixture axially toward the center hole 71, so that the first tapered part 121 of the small-diameter rod segment 12 first enters the center hole 71 of the spindle 7. The tapered surface of the first tapered part 121 contacts the opening of the center hole 71. Under the guiding action of the tapered surface, even if there is a slight centering deviation, the small-diameter rod segment 12 can smoothly slide into the center hole 71 and complete the initial positioning. At this time, the small-diameter rod segment 12 has a small radial movement space in the center hole 71 to compensate for the different axis errors and avoid jamming. Continue applying axial pressure to push the entire fixture into the spindle 7 until the second cone 111 abuts against and fits against the edge of the central hole 71. The fixture is radially limited relative to the spindle 7, completing the final positioning. At this point, the main rod 1 can no longer be pushed axially. The operating force or driving force continues, and under the axial preload generated by the continuous compression of the elastic element 3, the movable sleeve 2 begins to slide along the main rod 1 toward the end face of the spindle 7 until it is pressed against the end face of the spindle 7, completing the clamping. At this point, the second cone 111 engages with the edge of the hole to achieve radial limitation of the spindle 7, and is simultaneously pressed by the movable sleeve 2 to achieve axial limitation. Finally, the high-frequency quenching equipment can be started, and the spindle 7 rotates under the clamping of the fixture for uniform quenching. After quenching, the axial force applied to the fixture is removed. Under the restoring force of the elastic element 3, the movable sleeve 2 first separates from the end face of the spindle 7, and then the entire fixture can be pulled out of the central hole 71 of the spindle 7.

[0040] In the above embodiment, by having the second cone 111 abut against the edge of the central hole 71, the radial positioning reference is changed from the traditional inner hole surface to the edge of the central hole 71, so as to avoid radial runout of the spindle 7 during quenching rotation. Then, the movable sleeve 2 driven by the elastic element 3 continuously presses the end face of the spindle 7 to avoid axial runout of the spindle 7 during quenching rotation. This ensures that the distance between the quenching equipment and the quenching area of ​​the spindle 7 (such as the end annular surface 73 and R angle 72) remains consistent during high-speed rotation, thus ensuring quenching uniformity, avoiding cracks, and improving product quality.

[0041] In addition, during the tooling insertion process, the first cone 121 can initially guide the centering. As it is pressed down, the second cone 111 can automatically abut against the edge of the center hole 71 and be positioned. The elastic force of the movable sleeve 2 is used to automatically complete the clamping of the end face of the spindle 7, which realizes rapid clamping, improves production efficiency, reduces human error, and further improves product quality.

[0042] Based on the above embodiments, as a further preferred embodiment, the second cone portion 111 is a smooth curved surface, which forms a line contact with the chamfer of the opening of the central hole 71.

[0043] The opening of the center hole 71 is typically machined with a standard chamfer, which serves as a guide bevel. In this embodiment, the second cone 111 is machined into a smooth curved surface that mates with the chamfer line. Thus, when the tooling is installed in place, the smooth curved surface of the second cone 111 fits into the chamfered bevel of the center hole 71 opening. Compared to the traditional cylindrical surface (surface contact) fit, even if there is a centering deviation, the smooth curved surface can slide on the chamfered bevel until the contact forces on both sides are balanced, thereby automatically correcting the coaxiality of the spindle 7 and the tooling.

[0044] Based on the above embodiments, as a further preferred embodiment, the end of the movable sleeve 2 that presses against the end face of the spindle 7 is provided with an annular boss, which is used to wrap the port of the spindle 7 when the movable sleeve 2 presses against the end face of the spindle 7.

[0045] In this embodiment, an annular boss is provided at one end of the movable sleeve 2 that presses against the end face of the spindle 7. The annular boss extends inward in the axial direction and its cross-section is rectangular or slightly tapered. The inner diameter of the annular boss is slightly larger than the end diameter of the spindle 7, and the axial height of the annular boss can be set according to requirements, but it cannot cover the quenching area of ​​the spindle 7 (especially the R angle 72).

[0046] When the second tapered portion 111 abuts against the edge of the central hole 71, and the movable sleeve 2 presses against the end face of the spindle 7, the annular boss is fitted onto the outside of the end face of the spindle 7. The annular boss fits tightly against the non-quenched area near the end face of the spindle 7. Therefore, the end area of ​​the spindle 7 is wrapped by the annular boss from both the outer radial direction and the end face axial direction. On the one hand, this strengthens the radial and axial locking force on the spindle 7, more effectively preventing radial and axial runout of the spindle 7 during high-speed rotation. On the other hand, it protects the non-quenched area, preventing spatter generated during the quenching process.

[0047] Based on the above embodiments, as a further preferred option, please refer to... Figure 2 and Figure 3 The side wall of the movable sleeve 2 is provided with an axially extending elongated oval hole 4, and the large-diameter rod segment 11 is provided with a corresponding pin hole. The positioning pin 5 passes through the elongated oval hole 4 and is inserted into the pin hole.

[0048] In this embodiment, an axially extending elongated oval hole 4 is machined into the side wall of the movable sleeve 2, the axial length of which is greater than the working stroke of the movable sleeve 2, to avoid hindering the movement of the movable sleeve 2. A pin hole is machined at the position corresponding to the elongated oval hole 4 on the large-diameter rod segment 11. The positioning pin 5 is passed through the elongated oval hole 4 of the movable sleeve 2 and pressed into the pin hole of the large-diameter rod segment 11 for fixation. In this way, the elongated oval hole 4 and the positioning pin 5 cooperate to guide the axial sliding of the movable sleeve 2 and prevent rotation or tilting. The positioning pin 5 is fixed in the pin hole of the large-diameter rod segment 11, which can prevent the movable sleeve 2 from slipping off the small-diameter segment of the main rod 1 no matter where the movable sleeve 2 slides, and the length of the elongated oval hole 4 limits the maximum sliding stroke of the movable sleeve 2.

[0049] Based on the above embodiments, as a further preferred embodiment, the inner wall of the movable sleeve 2 is provided with an axially extending first guide portion, and the outer wall of the large-diameter rod segment 11 is provided with a corresponding axially extending second guide portion, and the first guide portion and the second guide portion are slidably connected.

[0050] Regarding the specific forms of the first and second guide portions, in one embodiment, an axially extending keyway is machined on the inner wall of the movable sleeve 2, and a guide key is machined on the outer wall of the large-diameter rod segment 11 at the position corresponding to the keyway. The guide key is inserted into the keyway and slides in contact with it. In this way, the sliding fit between the key and the keyway can constrain the movable sleeve 2 to slide only along the axial direction, ensuring that the movable sleeve 2 and the end face of the spindle 7 are always parallel, avoiding the risk of the spindle 7 being pushed off course due to tilting.

[0051] Based on the above embodiments, as a further preferred option, please refer to... Figure 2 and Figure 3 The end of the large-diameter rod segment 11 away from the small-diameter rod segment 12 is provided with a base 6 for the elastic element 3 to be connected.

[0052] In this embodiment, the base 6 has a groove on the side facing the movable sleeve 2, and the end of the elastic member 3 away from the movable sleeve 2 is fixed in the groove, which can provide a stable and reliable installation reference for the elastic member 3, prevent the elastic member 3 from radially tilting or twisting, and thus ensure that the clamping force is effectively transmitted to the movable sleeve 2.

[0053] Based on the above embodiments, as a further preferred embodiment, the base 6 is threadedly connected to the end of the large-diameter rod segment 11 that is away from the small-diameter rod segment 12.

[0054] In this embodiment, the base 6 is provided with a through hole with internal threads, and the end of the large-diameter rod segment 11 away from the small-diameter rod segment 12 is provided with external threads, allowing the base 6 to be directly screwed onto the large-diameter rod segment 11. This configuration allows the operator to rotate the base 6 to change the compression of the elastic element 3, thereby adjusting the axial preload of the movable sleeve 2 and setting the clamping force within a range sufficient to press against the end face of the spindle 7, thus better adapting to the quenching conditions of spindles 7 of different specifications. Furthermore, it facilitates the rotation and removal of the base 6, making it easy to remove and replace the elastic element 3, simplifying and speeding up maintenance.

[0055] Based on the above embodiments, as a further preferred embodiment, the outer surface of the base 6 is provided with an anti-slip structure.

[0056] In this embodiment, the anti-slip structure adopts, but is not limited to, knurled texture, raised dots, or stripes. Since there are often oil stains, water stains, or quenching liquid splashes at the quenching operation site, the surface of the base 6 is easily slippery. Setting an anti-slip structure can increase the friction coefficient of the base 6 and prevent the operator from slipping. For example, when rotating the base 6, the operator can hold the base 6 firmly to transmit torque, making the clamping force adjustment more accurate.

[0057] Based on the above embodiments, as a further preferred embodiment, the base 6 is provided with a mechanical interface for connecting to an external drive device.

[0058] In this embodiment, a mechanical interface is provided on the base 6, which is connected to an external drive device (such as a drive motor, servo cylinder, or robot end effector). This allows for fully automated clamping of the spindle 7, completely eliminating human error, saving time and effort, and significantly improving product quality and production efficiency. Furthermore, the thrust acting on the tooling can be applied smoothly along the axial direction, avoiding overload and misalignment that may occur during manual operation, effectively protecting the spindle 7 from structural damage due to impact.

[0059] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] The above provides a detailed description of a high-frequency quenching auxiliary tooling provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A high-frequency quenching auxiliary fixture, used for clamping and positioning the spindle (7) during high-frequency quenching, characterized in that, include: The main rod (1) is divided into a large-diameter rod segment (11) and a small-diameter rod segment (12) along the axial direction. The small-diameter rod segment (12) is provided with a first cone (121) at the end away from the large-diameter rod segment (11) for insertion into the center hole (71) of the main shaft (7). Its cone surface contacts the opening of the center hole (71) to achieve guidance. The connection between the small-diameter rod segment (12) and the large-diameter rod segment (11) is provided with a second cone (111) for abutting against the edge of the opening of the center hole (71). The movable sleeve (2) is coaxially sleeved outside the main rod (1) and can slide along the axial direction of the main rod (1); An elastic element (3) is provided between the movable sleeve (2) and the end of the large-diameter rod segment (11) away from the small-diameter rod segment (12), for providing the movable sleeve (2) with an axial preload in the direction of the small-diameter rod segment (12); When the second cone (111) abuts against the edge of the opening of the central hole (71), the movable sleeve (2) presses against the end face of the main shaft (7) under the action of the elastic member (3).

2. The high-frequency quenching auxiliary tooling according to claim 1, characterized in that, The maximum diameter of the first cone (121) is smaller than the diameter of the central hole (71), and the maximum diameter of the second cone (111) is larger than the diameter of the central hole (71).

3. The high-frequency quenching auxiliary tooling according to claim 1, characterized in that, The second cone (111) is a smooth curved surface, which forms a line contact with the chamfer of the opening of the central hole (71).

4. The high-frequency quenching auxiliary tooling according to claim 1, characterized in that, The movable sleeve (2) has an annular boss at one end that presses against the end face of the main shaft (7), which is used to wrap the port of the main shaft (7) when the movable sleeve (2) presses against the end face of the main shaft (7).

5. The high-frequency quenching auxiliary tooling according to claim 1, characterized in that, The side wall of the movable sleeve (2) is provided with an axially extending elongated oval hole (4), and the large-diameter rod segment (11) is provided with a corresponding pin hole. The positioning pin (5) passes through the elongated oval hole (4) and is inserted into the pin hole.

6. The high-frequency quenching auxiliary tooling according to claim 1, characterized in that, The inner wall of the movable sleeve (2) is provided with an axially extending first guide portion, and the outer wall of the large-diameter rod segment (11) is provided with an axially extending second guide portion. The first guide portion and the second guide portion are slidably connected.

7. The high-frequency quenching auxiliary tooling according to any one of claims 1 to 6, characterized in that, The large-diameter rod segment (11) is provided with a base (6) for connecting the elastic element (3) at the end away from the small-diameter rod segment (12).

8. The high-frequency quenching auxiliary tooling according to claim 7, characterized in that, The base (6) is threaded to the end of the large-diameter rod segment (11) away from the small-diameter rod segment (12).

9. The high-frequency quenching auxiliary tooling according to claim 7, characterized in that, The outer surface of the base (6) is provided with an anti-slip structure.

10. The high-frequency quenching auxiliary tooling according to claim 7, characterized in that, The base (6) is provided with a mechanical interface for connecting to an external drive device.

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