Induction quenching device

Abstract

The utility model relates to the technical field of induction quenching, and particularly discloses an induction quenching device which comprises a clamping and fixing chuck, a rotating table and an induction quencher. Wherein the clamping and fixing chuck is used for clamping a workpiece; the rotating table is used for driving the clamping and fixing chuck to rotate; the induction quencher comprises a support, a quenching liquid pipe and a plurality of silicon steel sheets, the silicon steel sheets are stacked in a rod shape, and the quenching liquid pipe is used for being externally connected with quenching liquid to spray the quenching liquid to a workpiece. The induction quenching device not only can ensure that the quenching gap is uniform, but also can ensure that induction current is uniformly distributed in a workpiece hardening area, so that the depth uniformity of an induction quenching layer can be improved, and the quenching quality is improved. In addition, the rotary table rotates to enable the part to rotate at a constant speed, quenching of workpieces with different diameters can be achieved, the inductor is different from a conventional annular inductor which can only quench workpieces with one diameter, and the inductor has better universality. And the height of the laminated silicon steel sheets can be set according to the quenching height of the workpiece to meet the quenching requirements of different heights.

Description

Technical Field

[0001] The utility model relates to the technical field of induction quenching, and more specifically to an induction quenching device. Background Art

[0002] Induction quenching is often used for surface hardening of parts such as gears and shafts to improve the wear resistance and fatigue strength of parts. Since induction quenching has fast heating speed and short heating time, there is no oxidation and decarburization after quenching, and the deformation of the workpiece is small. Therefore, induction quenching has been widely used in heat treatment production.

[0003] At present, the induction hardening of shaft parts is processed by conventional annular induction hardeners. However, due to the structure of the annular induction hardener itself, the induction hardening of a small section of the journal adjacent to the boss or flange cannot be realized, and thus the design requirements of the journal cannot be met, resulting in defects. In addition, the annular inductor is limited by its size and can usually only be used to quench workpieces of one diameter, with poor versatility. In addition, the conventional annular inductor is fixed to the surface of the part and needs to be moved up and down for quenching, so the quenching uniformity is poor. After the induction quenching is completed, due to the small distance between the annular inductor and the workpiece, it is inconvenient to hoist, so it may be necessary to disassemble the inductor to remove the workpiece, which is inconvenient to operate. The applicability and coordination of the induction quenching device are the key factors that determine the quenching effect and efficiency of the parts. In addition, due to the characteristics of fast heating speed, short time and fast operation of induction quenching, the induction quenching process has high requirements on the performance of fast and stable positioning of the part tooling, convenient and easy operation of the rotating operation, and quenching quality.

[0004] Therefore, how to effectively solve the problem that the annular induction hardener has a poor induction hardening effect on shaft parts is a problem that technical personnel in this field need to solve. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an induction hardening device, the structural design of which can effectively solve the problem of poor induction hardening effect of shaft parts.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] An induction hardening device, comprising:

[0008] A clamping fixed chuck is used to clamp the workpiece;

[0009] A rotating table, provided on the clamping and fixing chuck, for driving the clamping and fixing chuck to rotate;

[0010] The induction hardener comprises a bracket, a quenching liquid pipe and a plurality of silicon steel sheets. The quenching liquid pipe and the plurality of silicon steel sheets are both arranged on the bracket, and the plurality of silicon steel sheets are stacked in a rod shape. The quenching liquid pipe is used for externally connecting quenching liquid to spray the quenching liquid onto the workpiece.

[0011] Optionally, in the above-mentioned induction quenching device, the quenching liquid pipe includes a quenching liquid main pipe, at least a portion of which is arranged parallel to the stacking direction of the silicon steel sheets, and a plurality of liquid spray holes are opened on the portion parallel to the silicon steel sheets.

[0012] Optionally, in the above-mentioned induction quenching device, each of the silicon steel sheets is arranged in the quenching liquid main pipe.

[0013] Optionally, in the above-mentioned induction quenching device, each of the silicon steel sheets is nested outside the quenching liquid main pipe, and a fixing buckle is provided to cooperate with the quenching liquid main pipe, and the fixing buckle is used to clamp with different positions of the quenching liquid main pipe and press the multiple silicon steel sheets.

[0014] Optionally, in the above-mentioned induction quenching device, the quenching liquid main pipe includes a first vertical pipe and a second vertical pipe relative to each other, the top ends of the first vertical pipe and the second vertical pipe are connected by a first horizontal pipe, the bottom end of the first vertical pipe is connected to the second horizontal pipe, the bottom end of the second vertical pipe is connected to the third horizontal pipe, the second horizontal pipe and the third horizontal pipe are respectively arranged on the bracket, each of the silicon steel sheets and the liquid spray holes are arranged on the first vertical pipe, and the silicon steel sheet at the bottom layer is located at the bottom end of the first vertical pipe.

[0015] Optionally, in the above-mentioned induction quenching device, the quenching liquid pipe includes a quenching liquid nozzle, one end of the quenching liquid nozzle has a liquid inlet for externally connecting quenching liquid, and the other end has a nozzle.

[0016] Optionally, in the above-mentioned induction quenching device, the quenching liquid nozzle is a flexible tube.

[0017] Optionally, in the above-mentioned induction quenching device, the plurality of silicon steel sheets are detachably connected to the bracket respectively, so as to adjust the number of the silicon steel sheets stacked on the bracket.

[0018] Optionally, in the above-mentioned induction quenching device, the clamping fixed chuck includes a chassis coaxially fixedly connected to the rotating table and a plurality of chucks arranged on the chassis, the plurality of chucks are distributed at intervals along the circumference of the chassis, and each of the chucks is slidably arranged on the chassis along the radial direction of the chassis and can be locked at different positions of the sliding stroke by a locking component so as to clamp the outer peripheral surface of the workpiece.

[0019] Optionally, the induction hardening device comprises four chucks, and the four chucks are arranged opposite to each other in pairs.

[0020] The induction hardening device provided by the utility model comprises a clamping fixed chuck, a rotating table and an induction hardening device. The clamping fixed chuck is used to clamp the workpiece; the rotating table is arranged on the clamping fixed chuck and is used to drive the clamping fixed chuck to rotate; the induction hardening device comprises a bracket, a quenching liquid pipe and a plurality of silicon steel sheets, the quenching liquid pipe and the plurality of silicon steel sheets are both arranged on the bracket, and the plurality of silicon steel sheets are stacked in a rod shape, and the quenching liquid pipe is used to connect the quenching liquid externally to spray the quenching liquid onto the workpiece.

[0021] When the induction quenching device provided by the utility model is used to perform induction quenching on the flange journal, output shaft journal and other positions, the workpiece is clamped on the clamping fixed chuck and placed on the rotating table, and the induction quencher is placed at the position corresponding to the part of the workpiece to be quenched. The rotating table is rotated to make the part rotate at a uniform speed, and the induction head formed by multiple silicon steel sheets quickly heats the surface of the workpiece, and the quenching liquid pipe sprays the quenching liquid to the workpiece to cool and complete the quenching. With this induction quenching device, the induction quencher is fixed relative to the surface of the workpiece and does not need to be quenched by moving up and down. It can not only ensure the uniformity of the quenching gap, but also ensure that the induced current is evenly distributed in the hardening area of ​​the workpiece, thereby improving the uniformity of the induction quenching layer depth and improving the quenching quality. In addition, by rotating the rotating table to make the part rotate at a uniform speed, the quenching of workpieces of different diameters can be achieved, which is different from the conventional annular inductor that can only quench workpieces of one diameter, and has better versatility. And the height of the stacked silicon steel sheets can be set according to the height of the workpiece to be quenched to meet the quenching requirements of different heights.

[0022] In a preferred embodiment, the quenching liquid pipe includes a quenching liquid main pipe and a quenching liquid nozzle, and a liquid spray hole is opened on the quenching liquid main pipe. The quenching liquid is sprayed through the liquid spray hole and the quenching liquid is sprayed on the workpiece through the quenching liquid nozzle, so that the distribution area of ​​the quenching liquid is wider and more uniform, thereby improving the quenching effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the flange;

[0025] Figure 2 It is the structural diagram of the output shaft;

[0026] Figure 3 This is a structural schematic diagram of an induction quenching device according to a specific embodiment of the utility model;

[0027] Figure 4 A schematic diagram of an induction hardening device performing induction hardening on a flange journal;

[0028] Figure 5 Schematic diagram of the induction hardening device performing induction hardening on the output shaft journal.

[0029] The following are marked in the accompanying drawings:

[0030] The clamping and fixing chuck 100, the rotating table 200, and the induction hardener 300;

[0031] Chassis 110, chuck 120;

[0032] Bracket 310 , quenching liquid pipe 320 , silicon steel sheet 330 , quenching liquid main pipe 321 , spray hole 322 , quenching liquid spray pipe 323 , spray port 324 , fixing buckle 340 , first vertical pipe 3211 , second vertical pipe 3212 , first transverse pipe 3213 , second transverse pipe 3214 , third transverse pipe 3215 . DETAILED DESCRIPTION

[0033] The utility model discloses an induction hardening device to improve the induction hardening effect of shaft parts.

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] The induction hardening device provided by the utility model is applicable to but not limited to the induction hardening of parts such as flange journals and output shaft journals. For the convenience of explanation, the following embodiments are described by taking the flange journal and output shaft journal as examples. Figure 1 and Figure 2 , respectively showing the structures of the flange journal 1 and the output shaft journal 2 and the positions of the corresponding induction hardening areas A.

[0036] See also Figure 3-Figure 5 , Figure 3 This is a structural schematic diagram of an induction quenching device according to a specific embodiment of the utility model; Figure 4 A schematic diagram of an induction hardening device performing induction hardening on a flange journal; Figure 5 Schematic diagram of the induction hardening device performing induction hardening on the output shaft journal.

[0037] In a specific embodiment, the induction hardening device provided by the utility model includes a clamping fixed chuck 100, a rotating table 200 and an induction hardener 300. Among them, the clamping fixed chuck 100 is used to clamp the workpiece. The rotating table 200 is arranged on the clamping fixed chuck 100, and is used to drive the clamping fixed chuck 100 to rotate. It can be understood that the rotating table 200 can be equipped with a driving device to realize rotation and drive the clamping fixed chuck 100 to rotate, and the rotating table 200 can also be connected to an external driving device to rotate under the drive of the driving device and drive the clamping fixed chuck 100 to rotate. The induction hardener 300 includes a bracket 310, a quenching liquid pipe 320 and a plurality of silicon steel sheets 330. The bracket 310 is used to provide support, and the induction hardener 300 can be fixed as a whole to a position corresponding to the workpiece as needed, such as fixing the bracket 310 to a CNC robot arm to move with the CNC robot arm to correspond to the workpiece. Specifically combined with electronic scanning positioning, the CNC mechanical arm drives the induction quencher 300 to move to achieve automatic control. The quenching liquid pipe 320 and multiple silicon steel sheets 330 are both arranged on the bracket 310, and the multiple silicon steel sheets 330 are stacked in a rod shape. The quenching liquid pipe 320 is used to connect the quenching liquid to spray the quenching liquid onto the workpiece. Multiple silicon steel sheets 330 are stacked, and the specific stacking height can be set according to the required quenching height of the workpiece. The specific stacking height of multiple silicon steel sheets 330 is not less than the required quenching height of the workpiece. Multiple silicon steel sheets 330 are connected and turned on to generate an alternating magnetic field. When the induction head composed of multiple silicon steel sheets 330 approaches the surface of the workpiece, an induced current will be generated inside the workpiece. Due to the action of the resistor, the parts are heated. Due to the "skin effect" of the current, the current density on the surface of the workpiece is the largest, and the core current is almost zero. The surface of the workpiece will be heated to the quenching temperature within a few seconds, and the quenching liquid is sprayed on the workpiece through the quenching liquid pipe 320 to cool and quench the surface of the workpiece.

[0038] When the induction quenching device provided by the utility model is used to perform induction quenching on the flange journal, output shaft journal and other positions, the workpiece is clamped on the clamping fixed chuck 100 and placed on the rotating table 200, and the induction quencher 300 is placed at the position of the workpiece to be quenched. The rotating table 200 is rotated to make the part rotate at a uniform speed, and the induction head formed by multiple silicon steel sheets 330 quickly heats the surface of the workpiece, and the quenching liquid pipe 320 sprays the quenching liquid to the workpiece to cool and complete the quenching. With this induction quenching device, the induction quencher 300 is fixed relative to the surface of the workpiece and does not need to be quenched by moving up and down. It can not only ensure the uniformity of the quenching gap, but also ensure that the induced current is evenly distributed in the hardening area of ​​the workpiece, thereby improving the uniformity of the induction quenching layer depth and improving the quenching quality. In addition, by rotating the rotating table 200 to make the part rotate at a uniform speed, the quenching of workpieces of different diameters can be achieved, which is different from the conventional annular inductor that can only quench workpieces of one diameter, and has better versatility. Furthermore, the induction quenching device can set the height of the stacked silicon steel sheets 330 according to the required quenching height of the workpiece to meet the quenching requirements of different heights.

[0039] In some embodiments, the quenching liquid pipe 320 includes a quenching liquid main pipe 321, at least a portion of which is arranged parallel to the stacking direction of the silicon steel sheet 330, and a plurality of liquid spray holes 322 are provided on the portion parallel to the silicon steel sheet 330. One end of the quenching liquid main pipe 321 is a liquid inlet, and the other end is a liquid outlet, which is used for the circulation of the quenching liquid. By providing the liquid spray holes 322 on the quenching liquid main pipe 321, the quenching liquid flowing in the quenching liquid main pipe 321 is sprayed out from the liquid spray holes 322, and the sprayed quenching liquid is used for cooling and quenching after induction heating, and the spraying area is larger and more uniform. Specifically, the top of the distribution area of ​​the liquid spray holes 322 is not lower than the topmost silicon steel sheet 330, and the bottom of the distribution area of ​​the liquid spray holes 322 is not higher than the bottommost silicon steel sheet 330, so as to better spray the quenching liquid in the induction heating area.

[0040] In some embodiments, each silicon steel sheet 330 is arranged on the quenching liquid main pipe 321. That is, the quenching liquid main pipe 321 is arranged on the bracket 310, and the silicon steel sheet 330 is arranged on the quenching liquid main pipe 321, so there is no need to set a supporting structure corresponding to the silicon steel sheet 330. The structure is simpler and more compact, which is convenient for induction quenching of parts such as the journal. Of course, the silicon steel sheet 330 should not block the spray hole 322. Specifically, the silicon steel sheet 330 is sleeved outside the quenching liquid main pipe 321, and the silicon steel sheet 330 can be specifically U-shaped, and the two ends of the U-shaped opening are respectively separated from the edge of the quenching liquid main pipe 321. Then, the quenching liquid main pipe 321 is respectively provided with spray holes 322 at the gap position, that is, a row of spray holes 322 is respectively provided on both sides of the quenching liquid main pipe 321 corresponding to the silicon steel sheet 330. Spraying the quenching liquid from both sides of the silicon steel sheet 330 makes the spraying area larger and more uniform.

[0041] In some embodiments, each silicon steel sheet 330 is sleeved outside the quenching liquid main pipe 321, and a fixed buckle 340 is provided to cooperate with the quenching liquid main pipe 321. The fixed buckle 340 is used to clamp with different positions of the quenching liquid main pipe 321 and press the multiple silicon steel sheets 330. It can be understood that each silicon steel sheet 330 is sleeved outside the quenching liquid main pipe 321, not in a ring shape, but has an opening to meet the setting of the liquid spray hole 322. Specifically, the silicon steel sheet 330 is inlaid and combined with the quenching liquid main pipe 321. The fixed buckle 340 can be specifically U-shaped and can be clamped outside the quenching liquid main pipe 321. Two fixed buckles 340 can be provided, respectively provided below the bottommost silicon steel sheet 330 and above the topmost silicon steel sheet 330, so as to clamp the stacked silicon steel sheets 330 from both ends. Alternatively, only one fixing buckle 340 may be provided, and a lug may be provided on the quenching liquid main pipe 321, the lug being provided below the silicon steel sheet 330 at the bottom, and the fixing buckle 340 being provided above the silicon steel sheet 330 at the top, so that the stacked silicon steel sheets 330 can be clamped from both ends. By providing the fixing buckle 340, it is convenient to increase or decrease the number of silicon steel sheets 330 according to the required quenching height of the workpiece. After the silicon steel sheets 330 are increased or decreased to an appropriate number, that is, after the overall height of the stacked silicon steel sheets 330 meets the required quenching height of the workpiece, the silicon steel sheets 330 can be conveniently fixed by the fixing buckle 340.

[0042] In some embodiments, the quenching liquid main pipe 321 includes a first vertical pipe 3211 and a second vertical pipe 3212 opposite to each other, the top ends of the first vertical pipe 3211 and the second vertical pipe 3212 are connected by a first transverse pipe 3213, the bottom end of the first vertical pipe 3211 is connected to a second transverse pipe 3214, the bottom end of the second vertical pipe 3212 is connected to a third transverse pipe 3215, the second transverse pipe 3214 and the third transverse pipe 3215 are respectively arranged on the bracket 310, each silicon steel sheet 330 and the liquid spray hole 322 are arranged on the first vertical pipe 3211, and the silicon steel sheet 330 at the bottom layer is located at the bottom end of the first vertical pipe 3211. By arranging the silicon steel sheet 330 at the bottom end of the first vertical pipe 3211, the interference with the induction head is greatly reduced, and a small section of the journal corresponding to the boss or flange can still be effectively induction hardened, further improving the quenching effect and the versatility of the device.

[0043] In some embodiments, the quenching liquid pipe 320 includes a quenching liquid nozzle 323, one end of the quenching liquid nozzle 323 has a liquid inlet for externally connecting quenching liquid, and the other end has a nozzle 324. Through the cooperation between the quenching liquid nozzle 323 and the quenching liquid main pipe 321, the quenching liquid can be sprayed on the workpiece at the same time to improve the quenching effect. The number of quenching liquid nozzles 323 can be set as needed, such as two quenching liquid nozzles 323 are respectively set on both sides of the corresponding silicon steel sheet 330. Specifically, one end of the two quenching liquid nozzles 323 on each side can be connected to the quenching liquid through the main pipe.

[0044] In some embodiments, the quenching liquid nozzle 323 is a flexible tube. The flexible tube facilitates flexible adjustment of the nozzle 324 position of the quenching liquid nozzle 323 as needed to better meet the induction quenching treatment of workpieces of different sizes.

[0045] In some embodiments, a plurality of silicon steel sheets 330 are detachably connected to the bracket 310 to adjust the number of silicon steel sheets 330 stacked on the bracket 310. By detachably connecting the silicon steel sheets 330 to the bracket 310, the number of silicon steel sheets 330 can be increased or decreased as needed, such as for shaft necks of different lengths, thereby adjusting the height of the induction head formed by the stacked silicon steel sheets 330, that is, one device can achieve quenching of shaft necks of various sizes, further improving versatility. Moreover, the installation of this induction quencher 300 does not interfere with the parts. After quenching, the induction quencher 300 does not need to be disassembled. The parts can be directly hoisted, or the induction quencher 300 can be directly operated to exit the working area, such as by driving the induction quencher 300 to exit the working area through a CNC robot arm, which is safer and more convenient to operate.

[0046] In some embodiments, the clamping and fixing chuck 100 includes a chassis 110 coaxially fixedly connected to the rotating table 200 and a plurality of chucks 120 arranged on the chassis 110, wherein the plurality of chucks 120 are distributed at intervals along the circumference of the chassis 110, and each chuck 120 is slidably arranged on the chassis 110 along the radial direction of the chassis 110 and can be locked at different positions of the sliding stroke by a locking component to clamp the outer peripheral surface of the workpiece. The locking component can specifically be a bolt, a buckle, etc., which is not specifically limited here. The chuck 120 acts from different positions on the outer peripheral surface of the workpiece to clamp the workpiece, which is convenient for disassembly and assembly, and is convenient for induction hardening of the shaft neck and other parts of the workpiece. In other embodiments, the clamping and fixing chuck 100 can also use other conventional clamps to clamp the workpiece.

[0047] In some embodiments, four chucks 120 are included, and the four chucks 120 are arranged opposite to each other in pairs. Specifically, the four chucks 120 are evenly distributed along the circumference of the chassis 110. The reliability of clamping the workpiece can be ensured by the cooperation of the four chucks 120. In other embodiments, the number of chucks 120 can also be set as needed.

[0048] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An induction hardening device, It is characterized in that include: A clamping fixed chuck (100) for clamping a workpiece; A rotating platform (200) is disposed on the clamping and fixing chuck (100) and is used to drive the clamping and fixing chuck (100) to rotate; An induction hardener (300) comprises a bracket (310), a quenching liquid pipe (320) and a plurality of silicon steel sheets (330), wherein the quenching liquid pipe (320) and the plurality of silicon steel sheets (330) are both arranged on the bracket (310), and the plurality of silicon steel sheets (330) are stacked in a rod shape, and the quenching liquid pipe (320) is used for externally connecting a quenching liquid and spraying the quenching liquid onto the workpiece.

2. The induction hardening device according to claim 1, It is characterized in that The quenching liquid pipe (320) comprises a quenching liquid main pipe (321), at least a portion of which is arranged parallel to the stacking direction of the silicon steel sheets (330), and a plurality of liquid spray holes (322) are provided on the portion parallel to the silicon steel sheets (330).

3. The induction hardening device according to claim 2, It is characterized in that Each of the silicon steel sheets (330) is arranged on the quenching liquid main pipe (321).

4. The induction hardening device according to claim 3, It is characterized in that Each of the silicon steel sheets (330) is nested outside the quenching liquid main pipe (321), and a fixing buckle (340) is provided in cooperation with the quenching liquid main pipe (321). The fixing buckle (340) is used to be clamped with different positions of the quenching liquid main pipe (321) and to press the plurality of silicon steel sheets (330) tightly.

5. The induction hardening device according to claim 2, It is characterized in that The quenching liquid main pipe (321) comprises a first vertical pipe (3211) and a second vertical pipe (3212) which are opposite to each other. The top ends of the first vertical pipe (3211) and the second vertical pipe (3212) are connected via a first transverse pipe (3213). The bottom end of the first vertical pipe (3211) is connected to a second transverse pipe (3214). The bottom end of the second vertical pipe (3212) is connected to a third transverse pipe (3215). The second transverse pipe (3214) and the third transverse pipe (3215) are respectively arranged on the bracket (310). Each of the silicon steel sheets (330) and the liquid spray holes (322) are arranged on the first vertical pipe (3211), and the silicon steel sheets (330) at the bottom layer are located at the bottom end of the first vertical pipe (3211).

6. The induction hardening device according to any one of claims 1 to 5, It is characterized in that The quenching liquid pipe (320) comprises a quenching liquid nozzle (323), one end of the quenching liquid nozzle (323) is provided with a liquid inlet for externally connecting quenching liquid, and the other end is provided with a nozzle (324).

7. The induction hardening device according to claim 6, It is characterized in that The quenching liquid spray pipe (323) is a flexible pipe.

8. The induction hardening device according to any one of claims 1 to 5, It is characterized in that The plurality of silicon steel sheets (330) are respectively detachably connected to the bracket (310) so as to adjust the number of the silicon steel sheets (330) stacked on the bracket (310).

9. The induction hardening device according to any one of claims 1 to 5, It is characterized in that The clamping fixed chuck (100) comprises a chassis (110) coaxially fixedly connected to the rotating table (200) and a plurality of chucks (120) arranged on the chassis (110), wherein the plurality of chucks (120) are distributed at intervals along the circumference of the chassis (110), and each of the chucks (120) is slidably arranged on the chassis (110) along the radial direction of the chassis (110) and can be locked at different positions of the sliding stroke by a locking component so as to clamp the outer peripheral surface of the workpiece.

10. The induction hardening device according to claim 9, It is characterized in that It comprises four clamps (120), and the four clamps (120) are arranged opposite to each other in pairs.

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