A high-frequency induction hardening coil capable of uniform heating

Abstract

The present invention belongs to the technical field of high-frequency hardening coils, and specifically discloses a high-frequency induction hardening coil capable of uniform heating. The coil is characterized by comprising a coil diameter adaptive mechanism and a coil rotation mechanism. The coil diameter adaptive mechanism comprises an elastic induction coil, a centrifugal convergence assembly, and a sliding guide mechanism. The elastic induction coil is slidably arranged in the sliding guide mechanism, and the centrifugal convergence assembly is annularly arranged in the sliding guide mechanism. This solution adopts a rotational speed control scheme, combined with a counterweight block and a convergence rope to achieve convergence of the elastic induction coil, overcoming the technical bias that the diameter of a rotating object increases with increasing rotation speed, and achieving the technical effect that the faster the rotation speed, the smaller the diameter of the elastic induction coil. At the same time, through the alternating connection of the brush and two semicircular extension plates during rotation, the frequency can also be automatically regulated.

Description

Technical Field

[0001] The invention belongs to the technical field of high-frequency quenching coils, and in particular relates to a high-frequency induction quenching coil capable of being heated evenly. Background Art

[0002] Induction heating uses the principle of electromagnetic induction to generate eddy currents within a workpiece. When the alternating current output by the device passes through the inductor coil, it generates an alternating magnetic field, which in turn generates eddy currents within the workpiece. These eddy currents generate heat due to resistance, thereby heating the workpiece.

[0003] Generally speaking, in order to ensure the heating effect, the shape of the coil should match the workpiece. For example, a circular coil is preferred for a cylindrical part, and the inner diameter of the coil should be slightly larger than the outer diameter of the workpiece.

[0004] This means that in order to achieve the best heating effect, each diameter of the workpiece must be matched with a coil of different diameter. The current practice is to sacrifice some heating efficiency and energy utilization by matching different workpieces with one or several universal coils.

[0005] For different workpieces, not only are the coil diameter requirements different, but the frequency requirements for current direction conversion are also different: for small-diameter workpieces, due to their thin thickness, the frequency can be increased to increase the heating speed; but for large-diameter parts, due to the existence of the skin effect, the higher the frequency, the shallower the heating depth of the workpiece. At this time, the heating depth can only be increased by reducing the frequency to adapt to the situation of large-diameter workpieces with thick walls; this frequency adjustment generally needs to be performed actively. Summary of the Invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a high-frequency induction hardening coil that can be heated evenly; in order to achieve the adjustment of the coil diameter, this scheme adopts a rotation speed control scheme, combined with a counterweight block and a tightening rope to achieve the convergence of the elastic induction coil, overcoming the technical prejudice that the diameter of the rotating object increases with the increase of the rotation speed, and achieving the technical effect that the faster the rotation speed, the smaller the diameter of the elastic induction coil; at the same time, through the alternating connection of the brush and the two semicircular extension plates during the rotation process, the frequency can also be automatically regulated.

[0007] Since the elastic induction coil used in this solution is actually a special-shaped coil, the special-shaped coil has the defect of uneven heating compared with the circular coil. Therefore, most workpieces need to be equipped with an additional rotation mechanism when heating. However, since the coil itself is rotating, the present invention can still achieve relative rotation between the coil and the workpiece without setting up a workpiece rotation mechanism, thereby just smoothing out the technical disadvantages brought by the special-shaped coil.

[0008] The technical solution adopted by the present invention is as follows: The present invention proposes a high-frequency induction quenching coil that can be heated evenly, which is characterized by: including a coil diameter adaptive mechanism and a coil rotation mechanism, the coil diameter adaptive mechanism includes an elastic induction coil, a centrifugal bunching component and a sliding guide mechanism, the elastic induction coil is slidably arranged in the sliding guide mechanism, and the centrifugal bunching components are annularly arranged in the sliding guide mechanism.

[0009] Furthermore, the coil rotating mechanism includes an electrode, and a semicircular extension plate is provided on the electrode. The two semicircular extension plates form a ring, and the two semicircular extension plates do not contact each other.

[0010] By rotating the coil, on the one hand, the inner diameter of the elastic induction coil can be dynamically adjusted, and on the other hand, the direction of the current inside the elastic induction coil can be changed by rotation, creating conditions for the change of the magnetic field direction inside the elastic induction coil.

[0011] Preferably, the elastic induction coil is elastic and has a tendency to automatically expand when stationary. When the elastic induction coil slides along the sliding guide mechanism, the inner diameter of the elastic induction coil changes accordingly due to the folding and expansion of the elastic induction coil itself.

[0012] Wherein, brushes are symmetrically provided on the elastic induction coil and are in sliding contact with the semicircular extension plate.

[0013] The frequency of current conversion in the elastic induction coil is proportional to the rotation speed of the elastic induction coil. Through the above-mentioned rotation adjustment method, the technical effect of automatically and gradually reducing the magnetic field conversion frequency as the inner diameter of the elastic induction coil increases can be achieved.

[0014] Compared with circular coils, special-shaped coils have the disadvantage of uneven heating at different angles; however, since the special-shaped coils of this device can rotate at high speed while working, they can perfectly eliminate the defect of uneven heating of special-shaped coils and smooth out the technical disadvantages brought about by the use of special-shaped coils.

[0015] Furthermore, the centrifugal convergence component is evenly distributed in a ring shape, and the centrifugal convergence component includes a convergence rope and a counterweight chute. The counterweight chute is evenly distributed in a ring shape in the sliding guide mechanism. A sliding buckle is provided at one end of the convergence rope, and the convergence rope is slidably arranged in the adjacent sliding buckle. A counterweight block is provided at the other end of the convergence rope, and the counterweight block is slidably arranged in the counterweight chute.

[0016] When the rotation speed changes, the counterweight block can apply different amounts of pulling force to the restraining rope, thereby controlling the restraining force of the restraining rope; for the elastic induction coil that is in an unfolded state in the free state, the folding degree of the elastic induction coil can be adjusted by changing the restraining force; by designing the weight of the counterweight block, the matching parameters of the restraining force and the rotation speed of the restraining rope can be adjusted to a suitable state.

[0017] Preferably, the sliding guide mechanism includes a magnetic composite frame and a sliding guide plate, the sliding guide plate is symmetrically arranged inside the magnetic composite frame, the sliding guide plate is evenly distributed with guide grooves in an annular shape, the elastic induction coil is evenly distributed with guide slide columns in an annular shape, and the guide slide columns are engaged and slidably arranged in the guide grooves.

[0018] As a further preferred embodiment of the present invention, the weight of the counterweight is greater than the weight of the elastic induction coil, so when the coil diameter adaptive mechanism rotates as a whole, the counterweight can slide toward the outside and reduce the diameter of the elastic induction coil by tightening the tightening rope.

[0019] The guide slide column can limit the motion trajectory of the characteristic point on the elastic induction coil, and when the tightening force of the tightening rope is evenly distributed, the elastic induction coil can be evenly expanded and folded.

[0020] Preferably, the brush and the semicircular extension plate are electrically connected when in contact, the elastic induction coil, brush, electrode and semicircular extension plate are made of conductive materials, and the remaining parts inside the magnetic composite frame are all made of non-metallic materials, and the magnetic composite frame has the function of shielding the magnetic field.

[0021] Except for the elastic induction coil, brushes, electrodes and semicircular extension plates, the interior of the magnetic composite frame is made of high-temperature resistant non-metallic materials, thereby preventing these parts from being inductively heated in the magnetic field.

[0022] Furthermore, the coil rotation mechanism also includes a support assembly and a drive assembly, the coil diameter adaptive mechanism is provided in the support assembly, and the magnetic conductive composite frame is driven by the drive assembly.

[0023] Furthermore, it also includes a support cooling mechanism, which includes a support column and a PTFE plate base, and the support column is arranged on the PTFE plate base.

[0024] Preferably, the support assembly includes a support shell and a bearing, the support shell is arranged on the support column, and the bearing is arranged between the support shell and the magnetic conductive composite frame.

[0025] As a further preferred embodiment of the present invention, the driving assembly includes a driving motor, a driving gear and a driven gear, the driving gear is arranged on the output shaft of the driving motor, the driven gear is arranged below the magnetic composite frame, and the driving gear and the driven gear are engaged for transmission.

[0026] Preferably, the supporting cooling mechanism also includes a cooling component, which includes a heat sink. The heat sink can dissipate heat from the coil diameter adaptive mechanism and the coil rotation mechanism. A joint is provided on the heat sink, and the coolant enters the interior of the heat sink through the joint.

[0027] Most of the heat in the coil diameter adaptive mechanism and the coil rotation mechanism is conducted out and dissipated to the outside through the cooling component, so that the coil diameter adaptive mechanism and the coil rotation mechanism can be maintained within an ideal operating temperature range for a long time.

[0028] The beneficial effects achieved by the present invention using the above structure are as follows:

[0029] (1) By rotating the coil, on the one hand, the inner diameter of the elastic induction coil can be dynamically adjusted; on the other hand, the direction of the current inside the elastic induction coil can be changed by rotation, creating conditions for the change of the magnetic field direction inside the elastic induction coil.

[0030] (2) The frequency of current conversion in the elastic induction coil is proportional to the rotation speed of the elastic induction coil. Through the above-mentioned rotation adjustment method, the technical effect of automatically and gradually reducing the magnetic field conversion frequency as the inner diameter of the elastic induction coil increases can be achieved.

[0031] (3) Compared with circular coils, special-shaped coils have the disadvantage of uneven heating at different angles; however, since the special-shaped coils of this device can rotate at high speed while working, they can perfectly eliminate the defect of uneven heating of special-shaped coils and smooth out the technical disadvantages brought about by the use of special-shaped coils.

[0032] (4) When the rotation speed changes, the counterweight block can apply different amounts of tension to the draw rope, thereby controlling the draw force of the draw rope; for the elastic induction coil that is in the unfolded state in the free state, the folding degree of the elastic induction coil can be adjusted by changing the draw force; by designing the weight of the counterweight block, the matching parameters of the draw force of the draw rope and the rotation speed can be adjusted to a suitable state.

[0033] (5) The motion trajectory of the characteristic point on the elastic induction coil can be restricted by the guide slide. When the restraining force of the restraining rope is evenly distributed, the elastic induction coil can be evenly unfolded and folded.

[0034] (6) Except for the elastic induction coil, brush, electrode and semicircular extension plate, the interior of the magnetic composite frame is made of high-temperature resistant non-metallic materials, thereby preventing these parts from being inductively heated in the magnetic field.

[0035] (7) Most of the heat in the coil diameter adaptive mechanism and the coil rotation mechanism is extracted and dissipated to the outside through the cooling component, so that the coil diameter adaptive mechanism and the coil rotation mechanism can be maintained in an ideal operating temperature range for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a front view of a high-frequency induction hardening coil capable of uniform heating proposed by the present invention;

[0037] Figure 2 This is a left view of a high-frequency induction hardening coil capable of uniform heating proposed by the present invention;

[0038] Figure 3 A top view of a high-frequency induction hardening coil capable of uniform heating proposed by the present invention;

[0039] Figure 4 for Figure 2 A cross-sectional view along the cutting line AA;

[0040] Figure 5 for Figure 1 A cross-sectional view along the cutting line BB;

[0041] Figure 6 for Figure 2 A cross-sectional view along the cutting line CC;

[0042] Figure 7 This is a schematic diagram of a half-section structure of a high-frequency induction hardening coil capable of uniform heating proposed by the present invention;

[0043] Figure 8 for Figure 4 A partial enlarged view of point Ⅰ in the middle;

[0044] Figure 9 for Figure 7 A partial enlarged view of the middle II;

[0045] Figure 10 for Figure 6 A partial enlarged view of point III in the middle;

[0046] Figure 11 Schematic diagram of the force direction and electrical connection of the elastic induction coil.

[0047] Among them, 1. Coil diameter adaptive mechanism, 2. Coil rotation mechanism, 3. Support cooling mechanism, 4. Elastic induction coil, 5. Centrifugal convergence assembly, 6. Sliding guide mechanism, 7. Brush, 8. Guide slide column, 9. Condensation rope, 10. Counterweight block, 11. Counterweight slide groove, 12. Magnet composite frame, 13. Sliding guide plate, 14. Sliding buckle, 15. Guide slide groove, 16. Electrode, 17. Support assembly, 18. Drive assembly, 19. Semicircular extension plate, 20. Support shell, 21. Bearing, 22. Drive motor, 23. Drive gear, 24. Driven gear, 25. Support column, 26. Teflon plate base, 27. Cooling assembly, 28. Heat sink, 29. Connector.

[0048] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0051] like Figures 1 to 10 As shown, the present invention proposes a high-frequency induction hardening coil capable of uniform heating, characterized in that it includes a coil diameter adaptive mechanism 1 and a coil rotation mechanism 2, the coil diameter adaptive mechanism 1 includes an elastic induction coil 4, a centrifugal bunching component 5 and a sliding guide mechanism 6, the elastic induction coil 4 is slidably arranged in the sliding guide mechanism 6, and the centrifugal bunching component 5 is annularly arranged in the sliding guide mechanism 6.

[0052] The coil rotating mechanism 2 includes an electrode 16 , on which a semicircular extension plate 19 is provided. The two semicircular extension plates 19 form a ring, and the two semicircular extension plates 19 do not contact each other.

[0053] By rotating the coil, on the one hand, the inner diameter of the elastic induction coil 4 can be dynamically adjusted, and on the other hand, the current direction inside the elastic induction coil 4 can be changed by rotation, creating conditions for changing the direction of the magnetic field inside the elastic induction coil 4.

[0054] The elastic induction coil 4 is elastic and has a tendency to automatically expand when stationary. When the elastic induction coil 4 slides along the sliding guide mechanism 6, the inner diameter of the elastic induction coil 4 changes accordingly due to the folding and expansion of the elastic induction coil 4 itself.

[0055] Brushes 7 are symmetrically provided on the elastic induction coil 4 and are in sliding contact with the semicircular extension plate 19 .

[0056] The frequency of current conversion in the elastic induction coil 4 is proportional to the rotation speed of the elastic induction coil 4. Through the above-mentioned rotation adjustment method, the technical effect of automatically and gradually reducing the magnetic field conversion frequency as the inner diameter of the elastic induction coil 4 increases can be achieved.

[0057] Compared with circular coils, special-shaped coils have the disadvantage of uneven heating at different angles; however, since the special-shaped coils of this device can rotate at high speed while working, they can perfectly eliminate the defect of uneven heating of special-shaped coils and smooth out the technical disadvantages brought about by the use of special-shaped coils.

[0058] The centrifugal convergence assembly 5 is evenly distributed in a ring shape. The centrifugal convergence assembly 5 includes a convergence rope 9 and a counterweight chute 11. The counterweight chute 11 is evenly distributed in a ring shape in the sliding guide mechanism 6. A sliding buckle 14 is provided at one end of the convergence rope 9. The convergence rope 9 is slidably arranged in the adjacent sliding buckle 14. A counterweight block 10 is provided at the other end of the convergence rope 9. The counterweight block 10 is slidably arranged in the counterweight chute 11.

[0059] When the rotation speed changes, the counterweight 10 can apply different amounts of tension to the binding rope 9, thereby controlling the binding force of the binding rope 9; for the elastic induction coil 4 that is in the unfolded state in the free state, the folding degree of the elastic induction coil 4 can be adjusted by changing the binding force; by designing the weight of the counterweight 10, the matching parameters of the binding force of the binding rope 9 and the rotation speed can be adjusted to a suitable state.

[0060] The sliding guide mechanism 6 includes a magnetic composite frame 12 and a sliding guide plate 13. The sliding guide plate 13 is symmetrically arranged inside the magnetic composite frame 12. Guide grooves 15 are evenly distributed in an annular manner on the sliding guide plate 13. Guide slide columns 8 are evenly distributed in an annular manner on the elastic induction coil 4. The guide slide columns 8 are engaged and slidably arranged in the guide grooves 15.

[0061] The weight of the counterweight 10 is greater than the weight of the elastic induction coil 4 , so when the coil diameter adaptive mechanism 1 rotates as a whole, the counterweight 10 can slide toward the outside and reduce the diameter of the elastic induction coil 4 through the tightening of the tightening rope 9 .

[0062] The guide slide 8 can limit the movement trajectory of the characteristic point on the elastic induction coil 4. When the tightening force of the tightening rope 9 is evenly distributed, the elastic induction coil 4 can be evenly unfolded and folded.

[0063] The brush 7 and the semicircular extension plate 19 are electrically connected when in contact. The elastic induction coil 4, the brush 7, the electrode 16 and the semicircular extension plate 19 are made of conductive materials. The remaining parts located inside the magnetic composite frame 12 are all made of non-metallic materials. The magnetic composite frame 12 has the function of shielding the magnetic field.

[0064] Except for the elastic induction coil 4, the brush 7, the electrode 16 and the semicircular extension plate 19, the interior of the magnetic composite frame 12 is made of high-temperature resistant non-metallic materials, thereby preventing these parts from being inductively heated in the magnetic field.

[0065] The coil rotating mechanism 2 further includes a supporting assembly 17 and a driving assembly 18 . The coil diameter adaptive mechanism 1 is disposed in the supporting assembly 17 , and the magnetic conductive composite frame 12 is driven by the driving assembly 18 .

[0066] The cooling device further includes a support cooling mechanism 3 , which includes a support column 25 and a PTFE plate base 26 . The support column 25 is provided on the PTFE plate base 26 .

[0067] The support assembly 17 includes a support shell 20 and a bearing 21 . The support shell 20 is disposed on the support column 25 , and the bearing 21 is disposed between the support shell 20 and the magnetic conductive composite frame 12 .

[0068] The driving assembly 18 includes a driving motor 22, a driving gear 23 and a driven gear 24. The driving gear 23 is arranged on the output shaft of the driving motor 22, and the driven gear 24 is arranged below the magnetic composite frame 12. The driving gear 23 and the driven gear 24 are engaged for transmission.

[0069] The supporting cooling mechanism 3 also includes a cooling component 27, which includes a heat sink 28. The heat sink 28 can dissipate heat from the coil diameter adaptive mechanism 1 and the coil rotation mechanism 2. A joint 29 is provided on the heat sink 28, and the coolant enters the interior of the heat sink 28 through the joint 29.

[0070] Most of the heat in the coil diameter adaptive mechanism 1 and the coil rotating mechanism 2 is conducted away and dissipated to the outside through the cooling component 27 , thereby enabling the coil diameter adaptive mechanism 1 and the coil rotating mechanism 2 to be maintained within an ideal operating temperature range for a long time.

[0071] like Figure 11 As shown, the two electrodes 16 are respectively connected to the positive and negative poles of the DC power supply. The arrow indicates the direction of the pulling force of the counterweight 10 on the tightening rope 9 during rotation. The two dotted concentric circles respectively represent the minimum inner diameter and the maximum inner diameter of the elastic induction coil 4. The elastic induction coil 4 is in an unfolded state in its natural state. At this time, the inner diameter of the elastic induction coil 4 is the largest (but not a standard circle). As the tightening rope 9 is tightened, the elastic induction coil 4 can be contracted and folded toward the center. At this time, the inner diameter of the elastic induction coil 4 decreases.

[0072] The two brushes 7 on the elastic induction coil 4 are symmetrically arranged, and the electrodes 16 and the semicircular extension plate 19 are also symmetrically arranged. Therefore, the two brushes 7 contact different semicircular extension plates 19 at the same time. When the electrodes 16 remain unchanged, the direction of the current in the elastic induction coil 4 changes alternately.

[0073] During specific use, the user first needs to place the metal workpiece on top of the support shell 20 through an external clamping device. The part of the workpiece to be heated is roughly cylindrical. The workpiece and the support shell 20 are coaxially arranged, and the part to be heated is located inside the elastic induction coil 4. The two electrodes 16 are respectively connected to the positive and negative poles of the DC power supply.

[0074] Then, the drive motor 22 is started. The rotation speed of the drive motor 22 is set according to the diameter of the workpiece to be heated. The larger the diameter of the workpiece, the slower the rotation speed of the drive motor 22. The smaller the diameter of the workpiece, the faster the rotation speed of the drive motor 22.

[0075] When the driving motor 22 rotates the magnetic composite frame 12 through the meshing transmission of the driving gear 23 and the driven gear 24, the elastic induction coil 4 and the counterweight 10 also rotate accordingly. The elastic induction coil 4 and the counterweight 10 both have a tendency to move outward during rotation. However, since the counterweight 10 has a larger mass, the counterweight 10 can pull the binding rope 9 to bind when sliding in the counterweight chute 11, and overcome the elastic force of the elastic induction coil 4 itself to reduce the outer diameter of the elastic induction coil 4. Due to the guidance and positioning of the guide chute 15 on the guide slide 8, the elastic induction coil 4 can contract and expand evenly. When the outer diameter of the elastic induction coil 4 is reduced, the inner diameter of the elastic induction coil 4 will also be reduced until the inner diameter of the elastic induction coil 4 is slightly larger than the part to be heated of the workpiece.

[0076] During the rotation of the elastic induction coil 4, the brush 7 also slides in contact with the semicircular extension plate 19. Since the direction of the electrode 16 remains unchanged, a single brush 7 is alternately electrically connected to the two semicircular extension plates 19. Furthermore, the two brushes 7 are in contact with different semicircular extension plates 19 at the same time. Therefore, when the elastic induction coil 4 is energized, current flows inside the elastic induction coil 4, and the direction of the current changes back and forth.

[0077] When the direction of the current in the elastic induction coil 4 changes back and forth, the magnetic field generated by the elastic induction coil 4 also changes back and forth, thereby causing an induced current to appear inside the workpiece to be heated, thereby achieving induction heating of the part to be heated.

[0078] During the heating process, the magnetic composite frame 12 has the function of shielding the magnetic field. Therefore, the interior of the magnetic composite frame 12 is an induction heating area. Except for the elastic induction coil 4, brush 7, electrode 16 and semicircular extension plate 19, which are made of conductive materials, the other parts inside the magnetic composite frame 12 are all made of high-temperature resistant non-metallic materials, thereby avoiding the situation where these parts are also subjected to induction heating in the magnetic field.

[0079] The heat in the coil diameter adaptive mechanism 1 and the coil rotating mechanism 2 can be dissipated through the heat dissipation plate 28 and taken out through the circulation of the coolant. The coolant circulation system can be connected through the connector 29.

[0080] After heating is completed, the workpiece is placed in the quenching liquid through an external clamping device to complete the quenching.

[0081] During the induction heating process, due to the existence of the skin effect, the higher the frequency, the shallower the heating depth of the workpiece. Therefore, the larger the diameter of the workpiece and the thicker the thickness, the lower the heating frequency should be to ensure the heating depth; the smaller the diameter of the workpiece and the thinner the thickness, the higher the heating frequency can be to improve the heating efficiency.

[0082] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0083] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A high-frequency induction hardening coil capable of uniform heating, characterized in that: It includes a coil diameter adaptive mechanism and a coil rotation mechanism. The coil diameter adaptive mechanism includes an elastic induction coil, a centrifugal bunching component and a sliding guide mechanism. The elastic induction coil is slidably arranged in the sliding guide mechanism, and the centrifugal bunching components are annularly arranged in the sliding guide mechanism. The coil rotating mechanism includes an electrode, and a semicircular extension plate is provided on the electrode, wherein the two semicircular extension plates form a ring, and the two semicircular extension plates do not contact each other; The elastic induction coil is elastic and has a tendency to automatically expand when stationary. When the elastic induction coil slides along the sliding guide mechanism, the inner diameter of the elastic induction coil changes accordingly due to the folding and expansion of the elastic induction coil itself. The elastic induction coil is symmetrically provided with brushes that are in sliding contact with the semicircular extension plate; The centrifugal bunching assembly is evenly distributed in an annular shape, and includes a bunching rope and a counterweight chute. The counterweight chute is evenly distributed in an annular shape in a sliding guide mechanism. One end of the bunching rope is provided with a sliding buckle, and the bunching rope is slidably arranged in an adjacent sliding buckle. The other end of the bunching rope is provided with a counterweight block, and the counterweight block is slidably arranged in the counterweight chute. The sliding guide mechanism includes a magnetic composite frame and a sliding guide plate, wherein the sliding guide plate is symmetrically arranged inside the magnetic composite frame, the sliding guide plate is evenly distributed with guide grooves in an annular pattern, and the elastic induction coil is evenly distributed with guide slide posts in an annular pattern, and the guide slide posts are engaged and slidably arranged in the guide grooves; The weight of the counterweight block is greater than the weight of the elastic induction coil, so when the coil diameter adaptive mechanism rotates as a whole, the counterweight block can slide toward the outside and reduce the diameter of the elastic induction coil through the tightening of the tightening rope; The brush and the semicircular extension plate are electrically connected when in contact; the elastic induction coil, brush, electrode and semicircular extension plate are made of conductive materials; the remaining parts located inside the magnetic composite frame are all made of non-metallic materials; the magnetic composite frame has the function of shielding the magnetic field; The coil rotating mechanism further includes a supporting assembly and a driving assembly. The coil diameter adaptive mechanism is provided in the supporting assembly, and the magnetic conductive composite frame is driven by the driving assembly.

2. The high-frequency induction hardening coil capable of uniform heating according to claim 1, characterized in that: It also includes a supporting cooling mechanism, which includes a supporting column and a PTFE plate base, and the supporting column is arranged on the PTFE plate base.

3. The high-frequency induction hardening coil capable of uniform heating according to claim 2, characterized in that: The support assembly includes a support shell and a bearing. The support shell is arranged on the support column, and the bearing is arranged between the support shell and the magnet conductive composite frame.

4. The high-frequency induction hardening coil capable of uniform heating according to claim 3, characterized in that: The driving assembly includes a driving motor, a driving gear and a driven gear. The driving gear is arranged on the output shaft of the driving motor, and the driven gear is arranged below the magnetic conductive composite frame. The driving gear and the driven gear are meshed for transmission.

5. The high-frequency induction hardening coil capable of uniform heating according to claim 4, characterized in that: The support cooling mechanism also includes a cooling component, which includes a heat sink. The heat sink can dissipate heat from the coil diameter adaptive mechanism and the coil rotation mechanism. A joint is provided on the heat sink, and the coolant enters the interior of the heat sink through the joint.

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