A segmented induction hardening coil and heat treatment equipment

Abstract

The present invention relates to the technical field of heat treatment equipment, and in particular discloses a segmented induction quenching coil and heat treatment equipment. The segmented induction quenching coil comprises at least two hollow heating elements and a connecting unit. The at least two hollow heating elements are arranged on one side of a shaft to be processed and are sequentially connected along the axial direction of the shaft to be processed. An input port is provided at the upper end of each heating element and an output port is provided at the lower end. Among two adjacent heating elements, the output port of the upper heating element is connected to the input port of the heating element below it, and the two adjacent heating elements can slide relative to each other along the radial direction of the shaft to be processed. The connecting unit comprises a first mounting element provided with a first slide groove, a second mounting element and an adjusting component. The number of heating elements increases or decreases according to the number of shaft sections of the shaft to be processed. According to the change of the shaft diameter of each section, the adjusting component enables the two adjacent heating elements to move along the radial direction of the shaft to be processed, thereby realizing segmented heating adjustment, improving the heating method, improving the heating efficiency and reducing the production cost.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment equipment, and in particular to a segmented induction hardening coil and heat treatment equipment. Background Art

[0002] With the increasing popularity of automobiles and people's demand for automobiles, the manufacturing technology of automobile parts has also ushered in new opportunities and challenges. As the core components of the automobile, shaft parts such as the input shaft in the gearbox and the balance shaft in the balance module are required to have high mechanical properties such as surface wear resistance, yield strength, and tensile strength. Induction hardening heat treatment is an important special process in the processing of automobile parts. The mechanical properties of parts can be improved through overall induction hardening treatment. Induction hardening treatment has become one of the main heat treatment processes for automobile parts due to its high efficiency and low cost.

[0003] With the development of the automotive industry and the diversification of parts shapes, the design and manufacture of induction hardening coils have become a difficult point in the development of induction hardening processes. For example, for shaft parts with large differences in the diameter of multiple journals, the development of the overall induction hardening coil faces the problem of multiple debugging of the corresponding coils of different diameter journals. However, as a rigid object, the overall induction hardening coil can only be fine-tuned. If the distance needs to be adjusted significantly in multiple sections, it will inevitably greatly increase the cost and development time.

[0004] Therefore, there is an urgent need for a segmented induction hardening coil and a hardening device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a segmented induction hardening coil, which can adjust the radial distance between the induction hardening coil and the shaft to be processed in segments according to the changes in the multi-segment shaft diameter of the shaft to be processed, thereby improving the quenching effect, reducing production costs, facilitating adjustment, and improving processing efficiency.

[0006] Another object of the present invention is to provide a heat treatment device which can adjust the radial distance between the segmented induction hardening coil and the shaft to be processed, improve the quenching effect, reduce production costs, is easy to adjust, and has a wide range of uses.

[0007] In order to achieve the above objectives, the following technical solutions are provided:

[0008] A segmented induction hardening coil, used for induction heating a shaft to be processed, comprising:

[0009] At least two sections of hollow heating elements are arranged on one side of the shaft to be processed, and at least two sections of the heating elements are connected in sequence along the axial direction of the shaft to be processed. Each heating element has an input port at its upper end and an output port at its lower end. Among two adjacent heating elements, the output port of the upper heating element is connected to the input port of the lower heating element, and the two adjacent heating elements can slide relative to each other along the radial direction of the shaft to be processed;

[0010] A connecting unit, the connecting unit includes a first mounting member with a first sliding groove, a second mounting member and an adjusting assembly, the first mounting member is connected to one of the two adjacent heating members, one end of the second mounting member is slidably arranged in the first sliding groove, and the other end is connected to the other of the two adjacent heating members, and the adjusting assembly can make the second mounting member move relative to the first mounting member along the radial direction of the axis to be processed.

[0011] As an optional solution of the segmented induction hardening coil, the segmented induction hardening coil includes two heating elements, namely:

[0012] A first segmented heating element comprises a first body, wherein the first body is provided with a first input port and a first output port;

[0013] The second segmented heating element includes a second body, the second body is provided with a second input port and a second output port, the outer wall of the second input port is at least partially surrounded by a second slide groove, the first output port is inserted into the second input port from top to bottom, a portion of the outer wall surface of the first body abuts against the inner wall surface of the second slide groove, and the first body can move in the second slide groove along the radial direction of the axis to be processed.

[0014] As an optional solution for the segmented induction quenching coil, the adjustment assembly includes an elastic member and an adjustment bolt. The elastic member is provided between the side wall of the first slide groove close to the first body and the portion of the second mounting member located in the first slide groove. The elastic member is configured to make the second mounting member have a tendency to move away from the first body. A threaded hole is provided on the side wall of the first slide groove away from the first body. The adjustment bolt passes through the threaded hole and abuts against the second mounting member.

[0015] As an optional solution for the segmented induction hardening coil, a limiting plate is provided at the end of the portion of the second mounting member located at the first slide slot, and the width of the limiting plate is greater than the slot width of the first slide slot.

[0016] As an optional solution for the segmented induction hardening coil, the first mounting member is provided with a first clamping portion, and the second mounting member is provided with a second clamping portion, and the first clamping portion and the second clamping portion are respectively clamped on the outer wall surfaces of the first body and the second body.

[0017] As an optional solution of the segmented induction hardening coil, the segmented induction hardening coil further includes:

[0018] A third segmented heating element, the third segmented heating element comprising a third body, two ends of the third body are provided with a third input port and a third output port which are interconnected, the third input port is plugged with the second output port of the second segmented heating element;

[0019] A fourth segmented heating element, the fourth segmented heating element comprising a fourth body, both ends of the fourth body being provided with a fourth input port and a fourth output port which are mutually interpenetrating, the fourth input port being plugged into the third output port of the third segmented heating element;

[0020] The fifth segmented heating element comprises a fifth body, and both ends of the fifth body are provided with a fifth input port and a fifth output port which are interconnected, and the fifth input port is plugged into the fourth output port of the fourth segmented heating element.

[0021] As an alternative to the segmented induction hardening coil, the heating element is a copper tube with a rectangular channel inside.

[0022] As an optional solution for the segmented induction hardening coil, the first mounting member and the second mounting member are both made of plastic material.

[0023] As an optional solution of the heat treatment equipment, it includes an AC power supply and the segmented induction hardening coil as described above, and the AC power supply is electrically connected to both ends of the segmented induction hardening coil respectively.

[0024] As an optional solution for the heat treatment equipment, the heat treatment equipment also includes a cooling circulation device, the output end of the cooling circulation device is connected to one end of the segmented induction quenching coil, and the return end of the cooling circulation device is connected to the other end of the segmented induction quenching coil.

[0025] Compared with the prior art, the segmented induction hardening coil provided by the present invention has the following beneficial effects: the segmented induction hardening coil comprises at least two heating elements, the number of which can be increased or decreased accordingly according to the number of shaft segments of the shaft to be processed, and according to the change in the shaft diameter of each segment of the shaft to be processed, the adjustment component of the connecting unit can enable the corresponding two adjacent heating elements to move along the radial direction of the shaft to be processed. The segmented induction hardening coil can realize segmented heating adjustment for shaft parts with large differences in the diameters of multiple shaft necks, improve the heating method, improve the heating efficiency, and reduce the production cost.

[0026] The heat treatment equipment provided by the present invention has the following beneficial effects: according to the change of the shaft diameter of the shaft to be processed, the number of heating elements is increased or decreased, and the heating elements are relatively moved along the radial direction of the shaft to be processed by adjusting the components, thereby improving the quenching effect, reducing production costs, and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of the structure of a segmented induction hardening coil and a shaft to be processed provided in an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the explosion structure of the first segmented heating element and the second segmented heating element provided in an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of a segmented induction hardening coil provided in an embodiment of the present invention.

[0031] Reference numerals:

[0032] 100, segmented induction hardening coil; 200, shaft to be processed;

[0033] 1. first segmented heating element; 11. first body; 111. first input port; 112. first output port;

[0034] 2. second segmented heating element; 21. second body; 211. second input port; 212. second output port; 22. second chute;

[0035] 3. Connecting unit; 31. First mounting member; 311. First slide groove; 3111. Threaded hole; 32. Second mounting member; 321. Limiting plate; 33. Adjusting assembly; 331. Elastic member; 332. Adjusting bolt;

[0036] 4. The third segmented heating element; 41. The third body;

[0037] 5. The fourth segment heating element; 6. The fifth segment heating element. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is usually placed when in use, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, or to distinguish different structures or components, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The following combination Figures 1 to 3 The specific contents of this embodiment are described in detail. The present embodiment provides a segmented induction hardening coil for induction heating a shaft 200 to be processed. The segmented induction hardening coil 100 includes at least two hollow heating elements and a connecting unit 3. The at least two heating elements are arranged on one side of the shaft 200 to be processed. The at least two heating elements are sequentially connected along the axial direction of the shaft 200 to be processed. An input port is provided at the upper end of each heating element and an output port is provided at the lower end. Among two adjacent heating elements, the output port of the upper heating element is connected to the input port of the heating element below it, and the two adjacent heating elements can slide relative to each other in the radial direction of the shaft 200 to be processed; the connecting unit 3 includes a first mounting member 31 provided with a first slide groove 311, a second mounting member 32 and an adjusting component 33. The first mounting member 31 is connected to one of the two adjacent heating elements. One end of the second mounting member 32 is slidably arranged in the first slide groove 311, and the other end is connected to the other of the two adjacent heating elements. The adjusting component 33 can make the second mounting member 32 move relative to the first mounting member 31 in the radial direction of the shaft 200 to be processed.

[0042] For the shaft 200 to be processed with a large change in shaft diameter, the segmented induction hardening coil 100 provided in this embodiment includes at least two sections of heating elements. The number of heating elements can be increased or decreased accordingly according to the number of shaft sections of the shaft 200 to be processed. The adjustment component 33 of the connecting unit 3 enables the adjacent two sections of heating elements to move radially along the shaft 200 to be processed, and can be adjusted accordingly according to the change in the shaft diameter of each section of the shaft 200 to be processed. It can also meet different processing requirements and make corresponding adjustments according to the required gap distance between the heating element and the shaft 200 to be processed, so as to realize segmented heating adjustment of shaft parts, improve the heating method, improve heating efficiency, and reduce production costs. The heating element adopts an internal hollow structure, and the cooling liquid can circulate from the internal channel of the heating element. When in working state, the temperature of the heating element itself is reduced, so that the surrounding work is maintained at a normal temperature, and the comfort of the operator is improved.

[0043] Furthermore, if Figure 2 Combination Figure 3 As shown, in one embodiment of the present invention, the segmented induction hardening coil 100 specifically includes two heating elements, namely a first segmented heating element 1 and a second segmented heating element 2. The first segmented heating element 1 includes a first body 11, and the first body 11 is provided with a first input port 111 and a first output port 112. The first input port 111 and the first output port 112 can be arranged up and down along the diagonal of the first body 11; the second segmented heating element 2 includes a second body 21, and the second body 21 is provided with a second input port 211 and a second output port 212. The outer wall of the second input port 211 is at least partially surrounded by a second slide groove 22, and the first output port 112 can be inserted into the second input port 211 from top to bottom. Part of the outer wall surface of the first body 11 abuts against the inner wall surface of the second slide groove 22, and can move in the second slide groove 22 along the radial direction of the axis 200 to be processed; the first mounting member 31 of the connecting unit 3 is connected to the first body 11, and the second mounting member 32 is connected to the second body 21. In this embodiment, the first output port 112 of the first segmented heating element 1 is plugged into the second input port 211 of the second segmented heating element 2. The second slide groove 22 is radially extended along the axis 200 to be processed to avoid shaking or falling of the first body 11 when moving relative to the second body 21, thereby further ensuring the segmented movement stability of the segmented induction quenching coil 100, improving the quenching effect, and improving the processing efficiency.

[0044] Furthermore, if Figure 3As shown, the adjustment assembly 33 includes an elastic member 331 and an adjustment bolt 332. An elastic member 331 is provided between the side wall of the first slide groove 311 close to the first body 11 and the part of the second mounting member 32 located in the first slide groove 311. The elastic member 331 is configured to make the second mounting member 32 have a movement tendency away from the first body 11. A threaded hole 3111 is provided through the side wall of the first slide groove 311 away from the first body 11. The adjustment bolt 332 is penetrated through the threaded hole 3111 and abuts against the second mounting member 32. The elastic member 331 can be a compression spring, which is always in a compressed state, so that the second mounting member 32 always abuts against the end of the adjustment bolt 332. When the rotation adjustment bolt 332 moves in the direction close to the first body 11, the second mounting member 32 can immediately push the second body 21 along the second slide groove 22 to approach the first body 11, shorten the gap between the second body 21 and the shaft 200 to be processed, and improve the heating effect.

[0045] Furthermore, a stop plate 321 is provided at the end of the portion of the second mounting member 32 located in the first slide groove 311, and the width of the stop plate 321 is greater than the width of the first slide groove 311. When the second mounting member 32 moves relative to the first mounting member 31, it can keep moving in the set direction, and can also prevent the second mounting member 32 from sliding out of the first slide groove 311 to affect the adjustment accuracy.

[0046] Furthermore, the first mounting member 31 is provided with a first clamping portion, and the second mounting member 32 is provided with a second clamping portion, and the first clamping portion and the second clamping portion are respectively clamped on the outer wall surfaces of the first body 11 and the second body 21. The clamping method is adopted to facilitate the assembly and disassembly of the multi-stage heating element, and it is also convenient for maintenance personnel to replace parts when a fault occurs.

[0047] Furthermore, if Figure 1As shown, the segmented induction quenching coil 100 further includes a third segmented heating element 4, a fourth segmented heating element 5 and a fifth segmented heating element 6 which can be plugged into each other in sequence. The third segmented heating element 4 includes a third body 41, and the third input port and the third output port which are mutually connected are provided at both ends of the third body 41, and the third input port is plugged into the second output port 212 of the second segmented heating element 2; the fourth segmented heating element 5 includes a fourth body, and the fourth input port and the fourth output port which are mutually connected are provided at both ends of the fourth body, and the fourth input port is plugged into the third output port of the third segmented heating element 4; the fifth segmented heating element 6 includes a fifth body, and the fifth input port and the fifth output port which are mutually connected are provided at both ends of the fifth body, and the fifth input port is plugged into the fourth output port of the fourth segmented heating element 5. The third input port and the third output port at both ends of the third body 41 extend and penetrate in the vertical direction, and can be plugged into other corresponding segmented heating elements respectively, so as to extend the heating length of the entire segmented induction quenching coil 100. When the shaft 200 to be processed has a very long shaft section, the use range of the segmented induction hardening coil 100 is further expanded by adding a third segmented heating element 4 .

[0048] Furthermore, the heating element is a copper tube with a rectangular channel inside, which utilizes the characteristics of copper metal to improve thermal conductivity and reduce resistance.

[0049] Furthermore, the first mounting member 31 and the second mounting member 32 are made of non-conductive material to avoid electric shock during the adjustment process. Specifically, in the present embodiment, the first mounting member 31 and the second mounting member 32 are both made of plastic material. On the one hand, the insulating and non-conductive properties of the plastic material are utilized; on the other hand, the plastic material is cheap and easy to be integrally formed, and injection molding is adopted, which is convenient for manufacturing and can reduce production costs; on the other hand, the plastic material is corrosion-resistant and can extend the service life.

[0050] The installation and use of the segmented induction hardening coil 100 provided in this embodiment are as follows: 1) assemble from top to bottom in sequence; 2) start adjustment from the largest shaft diameter; 3) multiple rows of segmented induction hardening coils 100 can be arranged around the shaft 200 to be processed; 4) the shaft 200 to be processed needs to be in a state of rotating around the axis when heated.

[0051] The present embodiment also provides a heat treatment device, including an AC power supply and the segmented induction hardening coil 100 as described above, wherein the AC power supply is electrically connected to both ends of the segmented induction hardening coil 100. Specifically, the AC power supply is electrically connected to the uppermost end and the lowermost end of the segmented induction hardening coil 100. Further optionally, a frequency converter may be additionally provided at one end of the AC power supply to provide a corresponding current alternating frequency according to the processing requirements of the shaft 200 to be processed.

[0052] Furthermore, the heat treatment equipment also includes a cooling circulation device, the output end of the cooling circulation device is connected to one end of the segmented induction quenching coil 100, and the return end of the cooling circulation device is connected to the other end of the segmented induction quenching coil 100. Specifically, the output end of the cooling circulation device is connected to the uppermost end of the segmented induction quenching coil 100, and the return end is connected to the lowermost end of the segmented induction quenching coil 100, so as to reduce the heat conduction effect of the heating element itself on the external environment. Further optionally, the heat treatment equipment also includes a rapid spraying device, after the heating of the shaft 200 to be processed is completed, the rapid spraying device is aimed at the shaft 200 to be processed in a red-hot state to quickly spray a large amount of cooling water, and complete the last stage of the quenching treatment of the shaft 200 to be processed.

[0053] The working principle of the heat treatment equipment provided in this embodiment is: using the principle of electromagnetic induction, the parts to be processed cut the magnetic lines of force in the alternating magnetic field, generating an induced current on the surface of the parts to be processed, and based on the skin effect of the alternating current, the surface of the parts is quickly heated in the form of eddy currents, and then rapidly cooled to achieve quenching processing.

[0054] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A segmented induction hardening coil for induction heating a shaft to be processed (200), characterized in that: include: At least two sections of heating elements with hollow interiors are arranged on one side of the shaft (200) to be processed, the number of the heating elements can be increased or decreased accordingly according to the number of shaft sections of the shaft (200) to be processed, the at least two sections of the heating elements are connected in sequence along the axial direction of the shaft (200) to be processed, the upper end of each heating element is provided with an input port, and the lower end of each heating element is provided with an output port, and of two adjacent heating elements, the output port of the upper heating element is connected to the input port of the lower heating element, and the two adjacent heating elements can slide relative to each other along the radial direction of the shaft (200) to be processed; A connecting unit (3), the connecting unit (3) comprising a first mounting member (31) having a first sliding groove (311) therein, a second mounting member (32) and an adjusting assembly (33), the first mounting member (31) being connected to one of two adjacent heating members, one end of the second mounting member (32) being slidably disposed in the first sliding groove (311), and the other end being connected to the other of the two adjacent heating members, the adjusting assembly (33) being capable of enabling the second mounting member (32) to move relative to the first mounting member (31) along the radial direction of the axis to be processed (200); The segmented induction hardening coil includes two sections of heating elements, namely: A first segmented heating element (1) comprises a first body (11), wherein the first body (11) is provided with a first input port (111) and a first output port (112); The second segmented heating element (2) comprises a second body (21), the second body (21) being provided with a second input port (211) and a second output port (212), the outer wall of the second input port (211) being at least partially surrounded by a second slide groove (22), the first output port (112) being inserted into the second input port (211) from top to bottom, a portion of the outer wall surface of the first body (11) being in contact with the inner wall surface of the second slide groove (22), and being able to move in the second slide groove (22) along the radial direction of the shaft (200) to be processed; The adjustment assembly (33) comprises an elastic member (331) and an adjustment bolt (332); the elastic member (331) is provided between a side wall of the first slide groove (311) close to the first body (11) and a portion of the second mounting member (32) located in the first slide groove (311); the elastic member (331) is configured to make the second mounting member (32) have a tendency to move away from the first body (11); a threaded hole (3111) is provided through the side wall of the first slide groove (311) away from the first body (11); the adjustment bolt (332) is passed through the threaded hole (3111) and abuts against the second mounting member (32); The first mounting member (31) and the second mounting member (32) are both made of plastic material.

2. The segmented induction hardening coil according to claim 1, characterized in that: A limiting plate (321) is provided at the end of the portion of the second mounting member (32) located in the first sliding groove (311), and the width of the limiting plate (321) is greater than the groove width of the first sliding groove (311).

3. The segmented induction hardening coil according to claim 1, characterized in that: The first mounting member (31) is provided with a first clamping portion, and the second mounting member (32) is provided with a second clamping portion, and the first clamping portion and the second clamping portion are respectively clamped on the outer wall surfaces of the first body (11) and the second body (21).

4. The segmented induction hardening coil according to claim 3, characterized in that: The segmented induction hardening coil also includes: A third segmented heating element (4), the third segmented heating element (4) comprising a third body (41), two ends of the third body (41) being provided with a third input port and a third output port which are interconnected, the third input port being plugged into the second output port (212) of the second segmented heating element (2); A fourth segmented heating element (5), the fourth segmented heating element (5) comprising a fourth body, two ends of the fourth body being provided with a fourth input port and a fourth output port which are interconnected, the fourth input port being plugged into the third output port of the third segmented heating element (4); A fifth segmented heating element (6), the fifth segmented heating element (6) comprising a fifth body, two ends of the fifth body being provided with a fifth input port and a fifth output port which are interconnected, the fifth input port being plugged into the fourth output port of the fourth segmented heating element (5).

5. The segmented induction hardening coil according to claim 4, characterized in that: The heating element is a copper tube with a rectangular channel inside.

6. A heat treatment device, characterized in that: It comprises an AC power supply and a segmented induction hardening coil as claimed in any one of claims 1 to 5, wherein the AC power supply is electrically connected to two ends of the segmented induction hardening coil respectively.

7. The heat treatment equipment according to claim 6, characterized in that The heat treatment equipment further comprises a cooling circulation device, wherein an output end of the cooling circulation device is connected to one end of the segmented induction quenching coil, and a return end of the cooling circulation device is connected to the other end of the segmented induction quenching coil.

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