Inner and outer double-circle scanning induction heating quenching induction coil
By designing the internal and external double-ring scanning induction heating quenching induction ring, the problem of metallographic adjustment and low quenching efficiency during real-axis quenching without quenching of the clamping ring groove is solved, and the quenching effect with low energy consumption and high efficiency is achieved. Products with a smaller ratio of transition length to depth to hardened layer.
Patent Information
- Application Number
- CN202411284442.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2024-12-20
AI Technical Summary
In the prior art, when quenching the real shaft of the clamping ring groove without quenching, metallographic adjustment is difficult, low quenching efficiency and high energy consumption, especially when the ratio of the transition length to depth of the hardened layer is less than 1.8, the traditional upper and lower ring double. The ring induction ring cannot be effectively quenched, and the single-turn induction ring has problems of low efficiency and high energy consumption.
Design an inner and outer double-ring scanning induction heating and quenching induction ring, including the inner and outer rings of the induction ring, the axis of the inner ring and the outer ring overlap and are connected in series. The ring-shaped channel in the middle of the inner ring is used to insert the solid axis to realize the other The area is scan-induced heating and quenched by quenching, and the outer ring is arranged on the outside of the inner ring to form a structure with a low vertical height, and the inner and outer cooling water cavity is connected, and manufactured by welding splicing and turning.
Reduces the difficulty of controlling the transition length of the hardened layer, improves the quenching efficiency and energy efficiency, requires lower power, faster scanning speed, and significantly reduces energy consumption. It is suitable for products with a smaller ratio of transition length to depth of the hardened layer, solving the traditional The problem of metallographic adjustment difficulty and low quenching efficiency in technology.
Smart Images
Figure CN119162412A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of induction heating and quenching, and in particular relates to an inner and outer double-circle scanning induction heating and quenching induction ring. Background Art
[0002] For a real shaft with a clamping ring groove at the fixed end, the following two schemes are usually adopted for heat treatment of the real shaft: one is to perform scanning induction heating quenching on the entire real shaft, that is, the clamping ring groove position of the real shaft needs to be quenched; the other is to perform scanning induction heating quenching on other areas of the real shaft except the clamping ring groove, that is, the clamping ring groove position of the real shaft does not need to be quenched.
[0003] For the real shaft that needs quenching of the clamping ring groove, such as Figure 1 As shown, the ratio between the length of the hardened layer transition area obtained after quenching, that is, the hardened layer transition length and the hardened layer depth is usually larger, the hardened layer transition is smooth, and the metallographic adjustment difficulty, that is, the heat treatment difficulty is smaller, wherein the hardened layer depth represents the vertical distance from the workpiece surface to the specified limit hardness, wherein the hardened layer transition area includes the hardened area and the unhardened area, wherein Figure 1 The actual object corresponding to the hardened layer transition area in Figure 2 The area in box B in Figure 2 A schematic diagram showing a real shaft that has been quenched as a whole but has not yet been machined with a clamping ring groove, where the area indicated by arrow C in frame B represents the hardened area, and the area indicated by arrow D represents the unhardened area. Figure 1 The reference numeral 1 in the figure indicates the clamping ring groove. Figure 1 The 0.5MIN in the figure means that at least 0.5mm of horizontal space should be left from the end of the real shaft without quenching. Figure 1 The 16.9MAX in the figure represents the maximum horizontal distance between the end of the real shaft and the position corresponding to the minimum depth of the hardened layer, that is, the A1 position. Figure 1 R3.9MIN in it represents the minimum vertical distance between the center line of the real axis and the inner edge of the hardened layer.
[0004] For the real shaft whose clamping ring groove does not need to be quenched, due to the design strength requirements, such as Figure 3 As shown, the length of the hardened layer transition area obtained after quenching, that is, the ratio between the hardened layer transition length and the hardened layer depth, is usually small, the hardened layer transition is steep, and the metallographic adjustment difficulty, that is, the heat treatment difficulty is greater. Figure 3 The actual object corresponding to the hardened layer transition area in Figure 4 The area in box E in Figure 4 A schematic diagram showing a real shaft that has been quenched but the clamping ring groove has not been quenched, wherein the area indicated by the arrow F in the frame E represents the hardened area, and the area indicated by the arrow G represents the unhardened area. Figure 3 and Figure 4 The reference numeral 1 in the table indicates a clamping ring groove. Figure 3 The 0.5MIN in the figure means that at least 0.5mm horizontal spacing should be left from the right end of the clamping ring groove on the real shaft without quenching. Figure 3 The 16.9MAX in the figure represents the maximum horizontal distance between the end of the real shaft and the position corresponding to the minimum depth of the hardened layer, that is, the A1 position. Figure 3 R3.9MIN in the formula indicates the minimum vertical distance between the center line of the real axis and the inner edge of the hardened layer. In addition, especially when the ratio between the transition length of the hardened layer and the depth of the hardened layer is less than 1.8, such as Figure 5 As shown in the figure, the ratio between the transition length of the hardened layer and the depth of the hardened layer of a certain solid shaft product is 1.49, which means that the difficulty of metallographic adjustment, that is, the difficulty of heat treatment, is extremely high. Figure 5 The depth of the hardened layer in the sample is 4.1mm, and the transition length of the hardened layer is 6.1mm. If the upper and lower double-circle induction coil is used for quenching, the real axis needs to be vertically inserted into the middle annular channel of the upper and lower double-circle induction coil. However, due to the large vertical height of the upper and lower double-circle induction coil, the transition length of the hardened layer will exceed 6.1mm during quenching. Therefore, the upper and lower double-circle induction coil cannot be used for quenching. Figure 5 In order to quench the solid shaft products in the process, a single-turn induction coil with a small vertical height is required for quenching. However, the single-turn induction coil has the problems of low quenching efficiency and high energy consumption. Figure 5 The reference numeral 1 in the figure also indicates a clamping ring groove. Summary of the invention
[0005] In view of the above-mentioned defects of the prior art, the present invention provides an inner and outer double-ring scanning induction heating quenching induction ring, which has low metallographic adjustment difficulty, high quenching efficiency and low energy consumption when quenching the real shaft whose clamping ring groove does not need to be quenched.
[0006] The technical solution adopted by the present invention to solve its technical problem is:
[0007] An inner and outer double-ring scanning induction heating quenching induction ring comprises an inner ring of the induction ring and an outer ring of the induction ring arranged outside the inner ring of the induction ring, the axes of the inner ring of the induction ring and the outer ring of the induction ring coincide with each other and are connected in series, the top height of the inner ring of the induction ring is flush with the top height of the outer ring of the induction ring, and the bottom height of the inner ring of the induction ring is flush with the bottom height of the outer ring of the induction ring; the inner ring of the induction ring comprises an inner ring and an outer ring whose axes coincide with each other, the inner ring is hollow and the outer edge of the inner ring is sealed and fixedly connected with the inner edge of the outer ring, so that the hollow area of the inner ring forms an inner cooling water cavity; the outer ring of the induction ring is hollow and the hollow area forms an outer cooling water cavity; the middle annular channel of the inner ring of the induction ring is used to insert a real shaft that does not need quenching in the clamping ring groove, so as to realize scanning induction heating quenching of other areas of the real shaft.
[0008] Furthermore, the cross section of the inner ring is a hollow wedge shape, the outer side of the inner ring is thick and the inner side is thin, and the cross section of the outer ring is a rectangle.
[0009] Furthermore, the inner ring of the induction coil is formed by turning.
[0010] Furthermore, the outer edge of the inner ring is connected to the inner edge of the outer ring by welding.
[0011] Furthermore, the cross section of the outer ring of the induction coil is a hollow rectangle.
[0012] Furthermore, the outer ring of the induction coil is formed by turning or by winding a formed copper tube.
[0013] Furthermore, the top end of the outer ring is flush with the top end of the outer ring of the induction coil, and the bottom end of the outer ring is flush with the bottom end of the outer ring of the induction coil.
[0014] Furthermore, the inner cooling water cavity is communicated with the outer cooling water cavity.
[0015] Furthermore, one end of the inner ring of the induction coil is connected to a cooling water inlet joint, the other end of the inner ring of the induction coil is connected to one end of the outer ring of the induction coil, and the other end of the outer ring of the induction coil is connected to a cooling water outlet joint.
[0016] Furthermore, an insulating material is provided in the gap between the inner ring of the induction coil and the outer ring of the induction coil.
[0017] Compared with the prior art, the beneficial effects of the present invention are:
[0018] The inner and outer double-ring scanning induction heating quenching induction ring of the present invention comprises an inner ring of the induction ring and an outer ring of the induction ring arranged outside the inner ring of the induction ring, the axes of the inner ring of the induction ring and the outer ring of the induction ring coincide and are connected in series, the top height of the inner ring of the induction ring is flush with the top height of the outer ring of the induction ring, and the bottom height of the inner ring of the induction ring is flush with the bottom height of the outer ring of the induction ring; the inner ring of the induction ring comprises an inner ring and an outer ring whose axes coincide, the inner ring is hollow and the outer edge of the inner ring is sealed and fixedly connected with the inner edge of the outer ring, so that the hollow area of the inner ring forms an inner cooling water cavity; the outer ring of the induction ring is hollow and the hollow area forms an outer cooling water cavity; the middle annular channel of the inner ring of the induction ring is used to insert a real shaft that does not need quenching in the clamping ring groove, so as to realize scanning induction heating quenching of other areas of the real shaft. Since the outer ring of the induction coil is arranged on the outside of the inner ring of the induction coil, the axes of the inner ring of the induction coil and the outer ring of the induction coil coincide, the top height of the inner ring of the induction coil is flush with the top height of the outer ring of the induction coil, and the bottom height of the inner ring of the induction coil is flush with the bottom height of the outer ring of the induction coil. Compared with the traditional upper and lower double-ring induction coil in the background technology, the vertical height of the inner and outer double-ring scanning induction heating quenching induction coil in the present invention is relatively low. When quenching the real shaft whose clamping ring groove does not need to be quenched, the transition length of the hardened layer will not exceed the range of process requirements, and the transition length of the hardened layer can be controlled within the range of process requirements. Therefore, the metallographic adjustment is easy, and it is suitable for scanning induction heating quenching of shaft products with a small ratio of the transition length of the hardened layer to the depth of the hardened layer; and since the inner and outer double-ring scanning induction heating quenching induction coil in the present invention It comprises an inner ring of induction ring and an outer ring of induction ring connected in series, so that when a real shaft whose clamping ring groove does not need quenching is quenched, the quenching efficiency is high and the energy consumption is low. Specifically, the inner and outer double-ring scanning induction heating quenching induction ring in the present invention requires lower power, has a faster scanning speed, and has a faster quenching cycle, that is, a processing cycle, which can greatly reduce energy consumption and has a significant energy-saving effect. It can solve the problem of difficulty in metallographic adjustment faced when using traditional upper and lower double-ring induction rings to quench a real shaft whose clamping ring groove does not need quenching, and can solve the problem of low quenching efficiency and high energy consumption faced when using traditional single-ring induction rings to quench a real shaft whose clamping ring groove does not need quenching; in addition, the inner and outer double-ring scanning induction heating quenching induction ring in the present invention can be used to replace other occasions where single-ring scanning induction heating quenching is required, and is popularizable. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a partial half-section schematic diagram of the solid shaft after scanning induction heating quenching;
[0020] Figure 2 It is a partial physical schematic diagram of a real shaft that has been subjected to scanning induction heating quenching as a whole but has not yet been machined with a clamping ring groove;
[0021] Figure 3It is a partial half-section schematic diagram of the area other than the clamping ring groove on the real shaft after scanning induction heating quenching;
[0022] Figure 4 It is a partial physical schematic diagram of the areas other than the clamping ring groove on the real shaft after scanning induction heating quenching;
[0023] Figure 5 It is a half-section schematic diagram of other areas on the real shaft except the clamping ring groove after scanning induction heating quenching so that the ratio between the transition length of the hardened layer and the depth of the hardened layer is 1.49;
[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the inner and outer double-circle scanning induction heating quenching induction coil in the present invention;
[0025] Figure 7 for Figure 6 A schematic diagram of the three-dimensional structure in another direction;
[0026] Figure 8 for Figure 7 A schematic diagram of a three-dimensional cross-sectional structure in another direction;
[0027] Fig. 9 It is a schematic diagram of the main cross-sectional structure of the inner and outer rings of the induction coil;
[0028] Fig.10 It is a schematic diagram of the main cross-sectional structure of the inner ring in the inner ring of the induction coil;
[0029] Fig.11 It is a schematic diagram of the main cross-sectional structure after the outer edge of the inner ring of the induction coil is welded and spliced with the inner edge of the outer ring;
[0030] Fig.12 This is a partial physical picture obtained after the inner and outer double-ring scanning induction heating quenching induction ring of the present invention is used to quench the real shaft whose clamping ring groove does not need to be quenched;
[0031] Fig.13 This is a partial physical picture of the result obtained after a conventional single-turn induction coil is used to quench a real shaft whose clamping ring groove does not require quenching in the comparative example.
[0032] Explanation of the reference numerals in the figure: 1. clamping ring groove, 201. inner ring of the induction coil, 20101. inner ring, 20102. outer ring, 20103. inner cooling water cavity, 202. outer ring of the induction coil, 20201. outer cooling water cavity, 203. cooling water inlet connector, 204. cooling water outlet connector. DETAILED DESCRIPTION
[0033] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.
[0034] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0035] 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, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or 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.
[0036] like Figure 6-Figure 11 As shown, an inner and outer double-ring scanning induction heating quenching induction ring includes an inner ring 201 and an outer ring 202 arranged outside the inner ring 201. The axes of the inner ring 201 and the outer ring 202 coincide with each other and are connected in series. The top height of the inner ring 201 is flush with the top height of the outer ring 202, and the bottom height of the inner ring 201 is flush with the bottom height of the outer ring 202. The inner ring 201 includes an inner ring 202 whose axes coincide with each other. 101 and outer ring 20102, the inner ring 20101 is hollow and the outer edge of the inner ring 20101 is sealed and fixedly connected with the inner edge of the outer ring 20102, so that the hollow area of the inner ring 20101 forms an inner cooling water cavity 20103; the outer ring 202 of the induction coil is hollow and the hollow area forms an outer cooling water cavity 20201; the middle annular channel of the inner ring 201 of the induction coil is used to insert the clamping ring groove of the real shaft that does not need quenching, so as to realize scanning induction heating quenching of other areas of the real shaft.
[0037] Since the induction coil outer ring 202 is arranged on the outside of the induction coil inner ring 201, the axes of the induction coil inner ring 201 and the induction coil outer ring 202 coincide, the top height of the induction coil inner ring 201 is flush with the top height of the induction coil outer ring 202, and the bottom height of the induction coil inner ring 201 is flush with the bottom height of the induction coil outer ring 202. Compared with the traditional upper and lower double-circle induction coil in the background technology, the vertical height of the inner and outer double-circle scanning induction heating quenching induction coil in the present invention is relatively low. When quenching the real shaft whose clamping ring groove does not need to be quenched, the transition length of the hardened layer will not exceed the range of process requirements, and the transition length of the hardened layer can be controlled within the range of process requirements. Therefore, the metallographic adjustment is easy, and it is suitable for scanning induction heating quenching of shaft products with a small ratio of the hardened layer transition length to the hardened layer depth. In addition, since the inner and outer double-circle scanning induction coil in the present invention The induction heating quenching induction ring comprises an inner ring 201 and an outer ring 202 connected in series, so that when the real shaft whose clamping ring groove does not need quenching is quenched, the quenching efficiency is high and the energy consumption is low. Specifically, the inner and outer double-circle scanning induction heating quenching induction ring in the present invention requires lower power, has a faster scanning speed, and has a faster quenching cycle, that is, a faster processing cycle, which can greatly reduce energy consumption and has a significant energy-saving effect. It can solve the problem of difficulty in metallographic adjustment when the traditional upper and lower double-circle induction ring is used to quench the real shaft whose clamping ring groove does not need quenching, and can solve the problem of low quenching efficiency and high energy consumption when the traditional single-circle induction ring is used to quench the real shaft whose clamping ring groove does not need quenching; in addition, the inner and outer double-circle scanning induction heating quenching induction ring in the present invention can be used to replace other occasions where single-circle scanning induction heating quenching is required, and is popularizable.
[0038] The cross section of the inner ring 20101 is a hollow wedge shape and the outer side of the inner ring 20101 is thick and the inner side is thin. Fig.10 , the cross section of the outer ring 20102 is rectangular, see Fig. 9 The inner ring 201 of the induction coil is formed by turning; the outer edge of the inner ring 20101 is welded to the inner edge of the outer ring 20102, Fig.11 .
[0039] The cross section of the induction coil outer ring 202 is a hollow rectangle; the induction coil outer ring 202 is formed by turning or by winding a formed copper tube.
[0040] The top of the outer ring 20102 is flush with the top of the induction ring outer ring 202 , and the bottom of the outer ring 20102 is flush with the bottom of the induction ring outer ring 202 .
[0041] Among them, the inner cooling water cavity 20103 and the outer cooling water cavity 20201 are connected.
[0042] Preferably, one end of the induction coil inner ring 201 is connected to a cooling water inlet connector 203, the other end of the induction coil inner ring 201 is connected to one end of the induction coil outer ring 202, and the other end of the induction coil outer ring 202 is connected to a cooling water outlet connector 204. Figure 6 and Figure 7 .
[0043] In this way, when the inner and outer double-ring scanning induction heating quenching induction ring of the present invention is used to quench the real shaft whose clamping ring groove does not need to be quenched, the external cooling water enters the inner ring 201 of the induction ring through the cooling water inlet joint 203 to cool the inner ring 201 of the induction ring to prevent the inner ring 201 of the induction ring from burning out due to excessively high temperature, and the cooling water in the inner ring 201 of the induction ring that has undergone heat exchange enters the outer ring 202 of the induction ring to cool the outer ring 202 of the induction ring to prevent the outer ring 202 of the induction ring from burning out due to excessively high temperature, and the water in the outer ring 202 of the induction ring that has undergone heat exchange is discharged outwardly through the cooling water outlet joint 204.
[0044] An insulating material is provided in the gap between the induction coil inner ring 201 and the induction coil outer ring 202. Preferably, the insulating material is polytetrafluoroethylene.
[0045] Example
[0046] The inner and outer double-ring scanning induction heating quenching induction ring of the present invention is used to quench the real shaft whose clamping ring groove does not need quenching. The total length L of the processed real shaft is 668.5 mm, the diameter D of the real shaft is 21.7-23.9 mm, the depth of the hardened layer is 4.1 mm, and the local object obtained after quenching is shown in FIG. Fig.12 ,in Fig.12 The area indicated by the arrow H in the middle represents the hardened area.
[0047] Comparative Example
[0048] A conventional single-turn induction ring is used to quench a real shaft whose clamping ring groove does not require quenching, for comparative testing. The inner diameter of the single-turn induction ring in the comparative example is the same as the inner diameter of the inner ring 201 of the induction ring in the inner and outer double-turn scanning induction heating quenching induction ring in the embodiment. The vertical height of the single-turn induction ring in the comparative example is the same as the vertical height of the outer ring 202 of the induction ring in the inner and outer double-turn scanning induction heating quenching induction ring in the embodiment. The total length and diameter of the real shaft processed in the comparative example are the same as those in the embodiment, respectively. The required hardened layer depth in the comparative example is the same as that in the embodiment. The local object obtained after quenching in the comparative example is shown in FIG. Fig.13 ,in Fig.13 The area indicated by the arrow J in the middle represents the hardened area.
[0049] When the metallographic depth at the position corresponding to the minimum depth required for the hardened layer in the embodiment and the comparative example is the same, the morphology of the hardened layer in the embodiment is similar to that in the comparative example, see Fig.12 and Fig.13 ; In addition, during quenching, the difficulty of metallographic adjustment in the embodiment is the same as that in the comparative example.
[0050] In addition, the comparative data of the embodiments and comparative examples during the quenching test are shown in Table 1.
[0051] Table 1 Comparative data of the embodiments and comparative examples during quenching test
[0052]
[0053] It can be seen from Table 1 that, compared with the use of a traditional single-circle induction ring to quench a real shaft whose clamping ring groove does not require quenching, when the inner and outer double-circle scanning induction heating quenching induction ring of the present invention is used to quench a real shaft whose clamping ring groove does not require quenching, the required average power is lower, the average scanning speed is higher, the energy consumption is less, the cycle is faster, and the metallographic depth at the A1 position in the actual object obtained after quenching is the same as that in the comparative example, and the metallographic structure, i.e., the martensite level, is the same as that in the comparative example.
[0054] In summary, when the inner and outer double-ring scanning induction heating quenching induction ring of the present invention is used to quench the real shaft whose clamping ring groove does not need to be quenched, the quenching efficiency can be improved and the energy consumption can be reduced while reducing the difficulty of metallographic adjustment. Specifically, it can realize the function of reducing the difficulty of metallographic adjustment of the traditional single-ring induction ring, and achieve the effect of high efficiency and energy saving of the traditional upper and lower double-ring induction ring. The inner and outer double-ring scanning induction heating quenching induction ring of the present invention is suitable for scanning induction heating quenching of shaft products with a small ratio of hardened layer transition length to hardened layer depth.
[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.
Claims
1. An inner and outer double-ring scanning induction heating quenching induction coil, Features: The invention comprises an induction ring inner ring (201) and an induction ring outer ring (202) arranged outside the induction ring inner ring (201), wherein the axes of the induction ring inner ring (201) and the induction ring outer ring (202) coincide with each other and are connected in series, the top height of the induction ring inner ring (201) is flush with the top height of the induction ring outer ring (202), and the bottom height of the induction ring inner ring (201) is flush with the bottom height of the induction ring outer ring (202); the induction ring inner ring (201) comprises an inner ring (20101) and an outer ring (20202) whose axes coincide with each other. 102), the inner ring (20101) is hollow and the outer edge of the inner ring (20101) is sealed and fixedly connected to the inner edge of the outer ring (20102) so that the hollow area of the inner ring (20101) forms an inner cooling water cavity (20103); the outer ring (202) of the induction coil is hollow and the hollow area forms an outer cooling water cavity (20201); the central annular channel of the inner ring (201) of the induction coil is used to insert a clamping ring groove for a real shaft that does not need to be quenched, so as to realize scanning induction heating quenching of other areas of the real shaft.
2. According to claim 1, an inner and outer double-ring scanning induction heating quenching induction coil, Features: The cross section of the inner ring (20101) is a hollow wedge shape, and the outer side of the inner ring (20101) is thick and the inner side is thin. The cross section of the outer ring (20102) is a rectangle.
3. According to claim 1, an inner and outer double-ring scanning induction heating quenching induction coil, Features: The induction coil inner ring (201) is formed by turning.
4. According to claim 1, an inner and outer double-ring scanning induction heating quenching induction coil, Features: The outer edge of the inner ring (20101) and the inner edge of the outer ring (20102) are spliced by welding.
5. The inner and outer double-ring scanning induction heating quenching induction coil according to claim 1, Features: The cross section of the induction coil outer ring (202) is a hollow rectangle.
6. The inner and outer double-ring scanning induction heating quenching induction coil according to claim 1, Features: The outer ring (202) of the induction coil is formed by turning or by winding a formed copper tube.
7. The inner and outer double-ring scanning induction heating quenching induction coil according to claim 1, Features: The top height of the outer ring (20102) is flush with the top height of the induction coil outer ring (202), and the bottom height of the outer ring (20102) is flush with the bottom height of the induction coil outer ring (202).
8. The inner and outer double-ring scanning induction heating quenching induction coil according to claim 1, Features: The inner cooling water cavity (20103) and the outer cooling water cavity (20201) are connected.
9. The inner and outer double-ring scanning induction heating quenching induction coil according to claim 8, Features: One end of the induction coil inner ring (201) is connected to a cooling water inlet joint (203), the other end of the induction coil inner ring (201) is connected to one end of the induction coil outer ring (202), and the other end of the induction coil outer ring (202) is connected to a cooling water outlet joint (204).
10. The inner and outer double-ring scanning induction heating quenching induction coil according to claim 1, Features: An insulating material is provided at the gap between the inner ring (201) of the induction coil and the outer ring (202) of the induction coil.