CN219297577U

CN219297577U - Induction heater for quenching step shaft with round corners

Info

Publication number: CN219297577U
Application number: CN202320655400.0U
Authority: CN
Inventors: 谢文; 王正; 胡分员; 伍祥; 余存虎; 罗瑾锋
Original assignee: Hubei Tianshu Induction Technology Co ltd
Current assignee: Hubei Tianshu Induction Technology Co ltd
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-07-04
Anticipated expiration: 2033-03-29

Abstract

The utility model provides an induction heater for quenching a step shaft with a round corner, which comprises the following components: the first induction part is in a fan-shaped annular structure and is provided with a first end and a second end which are oppositely arranged; the second induction part is in a single-coil spiral annular structure and is provided with a third end and a fourth end which are oppositely arranged, the third end is fixedly connected with the second end, the fourth end is positioned at one side of the first end, and the connecting line of the first end and the fourth end is parallel to the central axis of the first induction part; the first electrode is fixedly connected with the first end of the first sensing part; and the second electrode is fixedly connected with the fourth end of the second sensing part. The induction heater is of a single-coil spiral structure, and reduces the magnetic field distribution of the induction heater on the axial surface when the axial surface of the step shaft is covered as much as possible, so that the magnetic field distribution is uniformly distributed on the axial surface and the transition fillet as much as possible, and the axial surface of the step shaft and the transition fillet are uniformly heated.

Description

Induction heater for quenching step shaft with round corners

Technical Field

The utility model relates to the technical field of quenching, in particular to an induction heater for quenching a stepped shaft with a round angle.

Background

In some step shaft workpiece production processes, induction quenching strengthening is required to be carried out on the shaft surface and the transition fillet of the step shaft so as to improve the wear resistance.

The single-circle circular inductor is used for quenching in two working procedures, and is influenced by the structure of a part, so that the round angle part quenched firstly is easily tempered in the shaft surface quenching process after the round angle quenching is finished, and meanwhile, the single-circle circular inductor has limited shaft surface coverage area and low heating efficiency.

As disclosed in the patent with publication number CN201447491U, a stepped shaft quenching inductor is a semi-closed magnetic field induction section formed by two side-by-side and symmetrical induction pipes, and the above stepped shaft quenching inductor can perform large-area induction heating on the axial surface of the stepped shaft, but cannot ensure that the stepped shaft and the transition fillet can be effectively heated, because the magnetic field distribution of the semi-closed magnetic field induction section is stronger, the magnetic field intensity distributed at the fillet is weaker, the current is too small, the heating efficiency is lower, and the uniform heating at the stepped shaft and the transition fillet cannot be realized.

Disclosure of Invention

In view of the above, the utility model provides an induction heater for quenching a step shaft with a round angle, which solves the problem that a semi-closed magnetic inductor cannot ensure uniform heating at the shaft surface and the transition round angle of the step shaft.

The technical scheme of the utility model is realized as follows:

the utility model provides an induction heater for quenching a step shaft with a round corner, which comprises the following components:

the first induction part is in a fan-shaped annular structure and is provided with a first end and a second end which are oppositely arranged;

the second induction part is in a single-coil spiral annular structure and is provided with a third end and a fourth end which are oppositely arranged, the third end is fixedly connected with the second end, the fourth end is positioned at one side of the first end, and the connecting line of the first end and the fourth end is parallel to the central axis of the first induction part;

the first electrode is fixedly connected with the first end of the first sensing part;

and the second electrode is fixedly connected with the fourth end of the second sensing part.

On the basis of the technical scheme, preferably, the central angle of the first sensing part is 30-180 degrees.

Still further, preferably, the first sensing portion and the second sensing portion are both provided with a magnetizer.

Still further, preferably, an arc rounded corner is provided at the outer edge of the inner ring of the first sensing part.

On the basis of the technical scheme, the device further comprises a third sensing part, one end of the third sensing part is fixedly connected with the first end of the first sensing part, the other end of the third sensing part horizontally extends and is flush with the fourth end of the second sensing part, and the first electrode is fixedly connected with one end of the third sensing part far away from the first sensing part.

Further, preferably, the first electrode, the third sensing portion, the second sensing portion and the second electrode are all hollow copper tubes.

Preferably, a first cooling liquid joint is arranged at one end of the first electrode, which is far away from the third sensing part, and a second cooling liquid joint is arranged at one end of the second electrode, which is far away from the second sensing part.

Preferably, the first electrode and the second electrode are respectively provided with a conductive connecting piece, and the conductive connecting pieces are used for being connected with quenching equipment.

Compared with the prior art, the utility model has the following beneficial effects:

(1) According to the induction heater disclosed by the utility model, the first induction part and the second induction part which are connected with each other are arranged, the first induction part is in a fan-shaped annular structure, the second induction part is in a single-circle spiral annular structure, the first induction part can realize induction heating of the transition round angle of the step shaft, meanwhile, the first induction part and the second induction part are matched to realize heating of the shaft surface of the step shaft, the whole induction heater is in a single-circle spiral structure, and when the shaft surface of the step shaft is covered as much as possible, the magnetic field distribution of the induction heater on the shaft surface is reduced, so that the magnetic field distribution is uniformly distributed on the shaft surface and the transition round angle as much as possible, and the shaft surface of the step shaft and the transition round angle are uniformly heated;

(2) Through setting the central angle of the first induction part, the proper perimeter of the first induction part is ensured, the magnetic field distribution of the first induction part at the transition fillet can be ensured to the greatest extent, and the heating efficiency of the transition fillet is improved; (3) Through all being provided with the magnetizer in first response portion and second response portion, can adjust the magnetic field distribution of induction heater in the axial plane of step axle and transition fillet department through the quantity of adjustment magnetizer in first response portion and second response portion, make the two magnetic field distribution general even to further guarantee the even heating of axial plane of step axle and transition fillet department.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of an induction heater according to the present disclosure;

FIG. 2 is a schematic view of a first perspective view of a three-dimensional assembly of an induction heater and a stepped shaft according to the present disclosure;

FIG. 3 is a schematic view of a second perspective view of a three-dimensional assembly of an induction heater and a stepped shaft according to the present disclosure;

FIG. 4 is a schematic view of an induction heater and stepped shaft plane assembly structure of the present disclosure;

FIG. 5 is a schematic diagram of a planar assembly structure of a first sensing portion, a second sensing portion and a magnetizer according to the present disclosure;

reference numerals:

1. a first sensing part; 11. a first end; 12. a second end; 2. a second sensing part; 21. a third end; 22. a fourth end; 3. a first electrode; 4. a second electrode; 13. arc round corners; 5. a third sensing part; 6. a first coolant joint; 7. a second coolant joint; 8. a conductive connection; s, a step shaft; s1, an axial surface; s2: a transition fillet; 9, a step of performing the process; a magnetic conductor.

Detailed Description

The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

In some related art, the induction heater is a single-turn circular inductor, and this structure can only achieve the purpose of separately quenching the fillet and the axial surface. In other related art, induction heaters are generally constructed in the form of a spiral coil wound with square, rectangular, circular, or anisotropic copper tubing. This kind of structure is higher to the efficiency when the axial face heating of step axle, but when carrying out transition fillet department heating simultaneously, then can exist because of most magnetic fields are distributed to the axial face, leads to the magnetic field intensity that the fillet department distributes weaker, and the electric current is too little, and heating efficiency is lower, can't realize step axle and transition fillet department and evenly heat.

In order to solve the technical problems, the embodiment of the utility model discloses an induction heater for quenching a step shaft with a round corner, which is used for simultaneously carrying out induction heating quenching on the shaft surface S1 of the step shaft S and the transition round corner S2 of the step shaft S.

As shown in fig. 1, in combination with fig. 2 to 4, the induction heater for quenching a stepped shaft S with rounded corners according to the present embodiment includes a first induction part 1, a second induction part 2, a first electrode 3, and a second electrode 4.

The first sensing portion 1 is in a fan-shaped annular structure, the first sensing portion 1 is provided with a first end 11 and a second end 12 which are oppositely arranged, and the first end 11 and the second end 12 are respectively located at two ends of the first sensing portion 1 in the length direction.

The second induction part 2 is of a single-coil spiral annular structure, the second induction part 2 is also of a copper pipe structure, electric conduction and heat conduction are facilitated, the second induction part 2 is provided with a third end 21 and a fourth end 22 which are oppositely arranged, and the third end 21 and the fourth end 22 are respectively located at two ends of the second induction part 2 in the length direction.

In the present embodiment, the third end 21 is fixedly connected to the second end 12, the fourth end 22 is located at one side of the first end 11, and the connecting line of the first end 11 and the fourth end 22 is parallel to the central axis of the first sensing portion 1. The first induction part 1 and the second induction part 2 are mutually connected and then wound into a single spiral coil, and the first electrode 3 is used for being fixedly connected with the first end 11 on the first induction part 1; the second electrode 4 is fixedly connected with the fourth end 22 on the second sensing part 2. The quenching transformer is connected with the first electrode 3 and the second electrode 4 to realize the electrifying of the single spiral coil formed by the first induction part 1 and the second induction part 2.

By adopting the technical scheme, the first induction part 1 is arranged into a fan-shaped annular structure, the second induction part 2 is arranged into a single-coil spiral annular structure, the first induction part 1 can realize induction heating on the transition fillet S2 of the step shaft S, meanwhile, the first induction part 1 and the second induction part 2 are matched to realize heating on the shaft surface S1 of the step shaft S, the whole induction heater is of a single-coil spiral structure, and when the shaft surface S1 of the step shaft S is covered as much as possible, the magnetic field distribution of the induction heater on the shaft surface S1 is reduced, so that the magnetic field distribution is uniformly distributed on the shaft surface S1 and the transition fillet S2 as much as possible, and the uniform heating of the shaft surface S1 of the step shaft S and the transition fillet S2 is ensured.

In this embodiment, the horizontal distance between the first end 11 and the fourth end 22 is greater than the width of the axial surface S1 of the step shaft S, so that the circumference of the single-turn spiral coil formed by the first sensing portion 1 and the second sensing portion 2 is increased, so that the axial surface S1 of the step shaft S can be covered, induction heating of the axial surface S1 of the step shaft S is achieved, and meanwhile, the first sensing portion 1 can correspond to the transition fillet S2 of the step shaft S, and the transition fillet S2 performs induction heating.

In order to enable the first induction part 1 to dispense more magnetic field at the transition fillet S2, the present embodiment sets the central angle of the first induction part 1 to 30 ° -180 °. In this embodiment, the central angle is preferably 90 °, so that the first sensing portion 1 can have a longer circumference, so that the first sensing portion 1 and the transition fillet S2 have more corresponding areas, and a stronger magnetic field distribution at the transition fillet S2 is ensured. Meanwhile, the central angle cannot be too small, if the central angle is too small, the circumference of the first induction part 1 is small, the magnetic field distribution is weak, and if the central angle is too large, the magnetic field distribution at the axial surface S1 is too large, and the magnetic field distribution of the axial surface S1 and the transition fillet S2 cannot be balanced.

Although the adjustment of the magnetic field distribution at the transition fillet S2 and the axial surface S1 can be achieved by adjusting the circumference of the first induction part 1, there is a certain limitation that the magnetic field distribution at the axial surface S1 and the transition fillet S2 of the whole induction heater cannot be well achieved as uniformly as possible.

In this embodiment, the magnetic conductors 9 are disposed on the first sensing portion 1 and the second sensing portion 2, and the number of the magnetic conductors 9 on the first sensing portion 1 and the second sensing portion 2 is adjusted to adjust the magnetic field distribution of the induction heater at the axial surface S1 and the transition rounded corner S2 of the step shaft S, so that the magnetic field distribution of the two is substantially uniform, thereby further ensuring uniform heating at the axial surface S1 and the transition rounded corner S2 of the step shaft S.

Specifically, referring to fig. 5, a certain number of magnetic conductors 9 are added to the first induction unit 1 and the second induction unit 2, respectively, to perform debugging, during induction heating, it is observed whether the axial surface S1 and the transition fillet S2 are heated simultaneously, and if there is a sequence, a part of magnetic conductors 9 are added to the induction unit heated later, or a part of magnetic conductors 9 may be removed from the induction unit heated earlier.

In the present embodiment, the magnetizer 9 may be a silicon steel sheet.

As some preferred embodiments, an arc-shaped fillet 13 is arranged at the outer edge of the inner ring of the first sensing part 1. The edge of the first sensing part 1 can keep a safe distance from the transition fillet S2, and touch ignition between the edge of the first sensing part 1 and the transition fillet S2 is avoided.

As some embodiments, the present embodiment further includes a third sensing portion 5, and the third sensing portion 5 is also provided as a hollow copper tube. One end of the third sensing part 5 is fixedly connected with the first end 11 of the first sensing part 1, the other end of the third sensing part 5 horizontally extends and is flush with the fourth end 22 of the second sensing part 2, and the first electrode 3 is fixedly connected with one end, far away from the first sensing part 1, of the third sensing part 5. By adopting the technical scheme, the third induction part 5 can cover the axial surface S1 of the step shaft S to realize uniform magnetic field distribution of the axial surface S1. In addition, by providing the third sensing portion 5, the first electrode 3 and the second electrode 4 can be kept parallel.

In order to realize heat dissipation of the first sensing part 1, the second sensing part 2 and the third sensing part 5, a first cooling liquid joint 6 is arranged at one end of the first electrode 3 far away from the third sensing part 5, and a second cooling liquid joint 7 is arranged at one end of the second electrode 4 far away from the second sensing part 2. The first electrode 3 is filled with cooling liquid through the first cooling liquid joint 6, the cooling liquid flows along the first electrode 3, the third sensing part 5, the first sensing part 1, the second sensing part 2 and the second electrode 4, and finally flows out through the second cooling liquid joint 7, so that the whole induction heater is cooled in a circulating way.

In this embodiment, the first electrode 3 and the second electrode 4 are respectively provided with a conductive connecting member 8, and the conductive connecting member 8 is used for connecting with quenching equipment. The induction heating device is connected with quenching equipment through a conductive connecting piece 8, the whole induction heater is kept motionless in the working process, the step shaft S is inserted into the induction heater, and induction heating is carried out on the shaft surface S1 and the transition fillet S2 on the step shaft S by rotating the step shaft S.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. An induction heater for quenching a stepped shaft with rounded corners, comprising:

the first induction part (1) is in a fan-shaped annular structure, and the first induction part (1) is provided with a first end (11) and a second end (12) which are oppositely arranged;

the second induction part (2) is in a single-coil spiral annular structure, the second induction part (2) is provided with a third end (21) and a fourth end (22) which are oppositely arranged, the third end (21) is fixedly connected with the second end (12), the fourth end (22) is horizontally positioned on one side of the first end (11), and the connecting line of the first end (11) and the fourth end (22) is parallel to the central axis of the first induction part (1);

the first electrode (3) is fixedly connected with the first end (11) on the first induction part (1);

and the second electrode (4) is fixedly connected with the fourth end (22) on the second induction part (2).

2. An induction heater for quenching a stepped shaft with rounded corners as claimed in claim 1, wherein: the central angle of the first induction part (1) is 30-180 degrees.

3. An induction heater for quenching a stepped shaft with rounded corners as claimed in claim 1 or 2, wherein: the first induction part (1) and the second induction part (2) are both provided with magnetizers (9).

4. An induction heater for quenching a stepped shaft with rounded corners as claimed in claim 2, wherein: an arc round corner (13) is arranged at the outer edge of the inner ring of the first induction part (1).

5. An induction heater for quenching a stepped shaft with rounded corners as claimed in claim 1, wherein: still include third induction part (5), the one end of third induction part (5) and first end (11) fixed connection on first induction part (1), the other end level of third induction part (5) extends and flushes with fourth end (22) on second induction part (2), and first electrode (3) and third induction part (5) keep away from the one end fixed connection of first induction part (1).

6. An induction heater for quenching a stepped shaft with rounded corners as claimed in claim 5, wherein: the first electrode (3), the third sensing part (5), the second sensing part (2) and the second electrode (4) are all arranged as hollow copper tubes.

7. An induction heater for quenching a stepped shaft with rounded corners as claimed in claim 6, wherein: one end of the first electrode (3) far away from the third induction part (5) is provided with a first cooling liquid joint (6), and one end of the second electrode (4) far away from the second induction part (2) is provided with a second cooling liquid joint (7).

8. An induction heater for quenching a stepped shaft with rounded corners as claimed in claim 6, wherein: the first electrode (3) and the second electrode (4) are respectively provided with a conductive connecting piece (8), and the conductive connecting pieces (8) are used for being connected with quenching equipment.