CN217428390U

CN217428390U - Induction heating device

Info

Publication number: CN217428390U
Application number: CN202220493620.3U
Authority: CN
Inventors: 杨青峰; 张原�; 魏悦彬; 潘国瑞; 崔智敏
Original assignee: Shenzhen Sking Intelligent Equipment Co Ltd
Current assignee: Shenzhen Sking Intelligent Equipment Co Ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-09-13
Anticipated expiration: 2032-03-08

Abstract

The utility model discloses an induction heating device, this induction heating device include bearing structure, heating structure, a plurality of temperature sensor and master controller. Heating structure and a plurality of temperature sensor all set up on bearing structure, and the heater is used for heating the work piece that bearing structure bore, and a plurality of temperature sensor are used for detecting the surface temperature of the work piece after the heating, and the master controller is connected with heating structure and a plurality of temperature sensor electricity respectively, and the master controller is used for receiving the surface temperature of the work piece that a plurality of temperature sensor detected to compare the surface temperature of work piece in expected temperature, thereby control heating structure's current strength according to the comparison result. Adopt the utility model provides an induction heating device can guarantee that the surface of work piece can the thermally equivalent and the surface temperature of work piece can heat to anticipated temperature to improve structural strength, wearability and the shock resistance of work piece.

Description

Induction heating device

Technical Field

The utility model relates to a heating technology field especially relates to an induction heating device.

Background

When the induction heating device heats a workpiece (such as a cuboid workpiece, a gear and the like), the surface of the workpiece needs to be uniformly heated, and the surface temperature of the workpiece can be heated to an expected temperature, so that the workpiece is ensured to have good structural strength, wear resistance and impact resistance. However, in the related art, when heating a workpiece, the induction heating apparatus cannot achieve the purpose of uniformly heating the surface of the workpiece, which results in low structural strength, and poor wear resistance and impact resistance of the heated workpiece.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model discloses induction heating device can guarantee that the surface of work piece can the thermally equivalent and the surface temperature of work piece can heat to anticipated temperature to improve structural strength, wearability and the shock resistance of work piece.

In order to achieve the above object, the utility model discloses an induction heating device, this induction heating device includes:

the bearing structure is used for bearing a workpiece;

the heating structure is arranged on the bearing structure and used for heating the workpiece;

the temperature sensors are arranged on the bearing structure and used for detecting the surface temperature of the workpiece heated by the heating structure; and

the main controller is electrically connected with the heating structure and the temperature sensors and used for receiving the surface temperature of the workpiece detected by the temperature sensors and comparing the surface temperature with an expected temperature so as to control the current intensity of the heating structure according to a comparison result.

As an optional implementation manner, in an embodiment of the present invention, the plurality of temperature sensors are disposed on the supporting structure at intervals, and the plurality of temperature sensors are configured to detect temperatures of different surfaces of the workpiece, or the plurality of temperature sensors are configured to detect temperatures of different positions on the same surface of the workpiece.

As an optional implementation manner, in an embodiment of the present invention, the bearing structure includes a bearing main body and a mounting rack connected to the bearing main body, the bearing main body is used for bearing the workpiece, the heating structure is disposed on the bearing main body, and the plurality of temperature sensors are disposed on the mounting rack.

As an optional implementation manner, in an embodiment of the present invention, the mounting frame is movably connected to the carrying body, and/or the plurality of temperature sensors are movably disposed on the mounting frame to adjust a position of the temperature sensor relative to the carrying body.

As an optional implementation manner, in the embodiment of the present invention, a plurality of angle adjustment components are disposed on the mounting frame, the plurality of temperature sensors are respectively disposed on the mounting frame through the plurality of angle adjustment components, the angle adjustment component is used for adjusting an included angle α between a detection direction of the temperature sensor and a preset direction, α is greater than or equal to 0 ° and less than or equal to 90 °, and the preset direction is a direction of the angle adjustment component toward the surface of the workpiece.

As an optional implementation manner, in an embodiment of the present invention, a groove is disposed on the bearing main body, and the mounting frame and/or the heating structure are disposed at the groove.

As an alternative, in an embodiment of the present invention, the heating structure is a ring structure, and the ring structure is used for the workpiece to pass through.

As an optional implementation manner, in an embodiment of the present invention, the heating structure includes a dual-frequency power supply and an induction coil electrically connected to the dual-frequency power supply, the dual-frequency power supply is electrically connected to the main controller, and the induction coil is used for heating the workpiece.

As an optional implementation manner, in an embodiment of the present invention, the induction heating apparatus further includes a driving structure, and the driving structure is configured to drive the workpiece to move relative to the bearing structure.

As an optional implementation manner, in an embodiment of the present invention, the heating structure is disposed adjacent to the temperature sensor and in front of the temperature sensor along a moving direction of the workpiece.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses an induction heating device detects the temperature of the different positions of work piece through setting up a plurality of temperature sensor to carry the temperature information after will detecting to the master controller, the master controller is again according to the temperature information of receipt and the comparison result control heating structure's of anticipated temperature current intensity. Therefore, on one hand, the current intensity of the heating structure at the corresponding position can be correspondingly adjusted through the temperature information detected by the temperature sensor, so that the induction heating device can uniformly heat different positions of the workpiece; on the other hand, the surface temperature of the workpiece is detected by the plurality of temperature sensors simultaneously, so that whether the surface temperature of the workpiece is heated to the expected temperature or not is judged. That is to say, adopt the utility model provides an induction heating device can guarantee that the surface of work piece can the thermally equivalent and the surface temperature of work piece can heat to anticipated temperature to improve structural strength, wearability and the shock resistance of work piece.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an induction heating device disclosed in an embodiment of the present invention;

fig. 2 is an exploded schematic view of an induction heating apparatus according to an embodiment of the present invention;

FIG. 3 is an enlarged view of the region L in FIG. 2;

fig. 4 is a schematic diagram of a dual frequency power supply of an induction heating apparatus according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an induction heating apparatus according to an embodiment of the present invention.

Description of the main reference numerals: 10. an induction heating device; 11. a load bearing structure; 111. a load bearing body; 112. a mounting frame; 112a, a first upright rod; 112b and a second vertical rod; 112c, a cross bar; 113. a groove; 12. a heating structure; 121. a dual-frequency power supply; 121a, an intermediate frequency power supply; 121b, a high frequency power supply; 122. an induction coil; A. a first transformer; B. a first resonant capacitor; C. a dual-frequency coupler; D. a second transformer; E. a first resonance coil; F. a second resonance coil; G. a third resonance coil; H. a fourth resonance coil; I. a second resonant capacitor; J. a third transformer; 13. a temperature sensor; 14. a master controller; 141. a temperature monitoring unit; 142. a regulatory unit; 143. a dual-frequency induction control unit; 143a, a first sub-control unit; 143b, a second sub-control unit; 15. an angle adjusting member; 16. a display; 20. and (5) a workpiece.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following examples and drawings.

Referring to fig. 1 to 3, an induction heating device 10 is provided for heating a workpiece 20 (such as a rectangular rod, a cylindrical rod, or a gear). In particular, the induction heating device 10 comprises a carrying structure 11, a heating structure 12, a temperature sensor 13 and a master controller 14. The carrying structure 11 is used for carrying the workpiece 20. A heating structure 12 is provided on the carrying structure 11, the heating structure 12 being configured to heat the workpiece 20 carried by the carrying structure 11. The number of the temperature sensors 13 is plural, the plurality of temperature sensors 13 are all disposed on the bearing structure 11, and the plurality of temperature sensors 13 are configured to detect the surface temperature of the workpiece 20 heated by the heating structure 12. The master controller 14 is electrically connected to the heating structure 12 and the plurality of temperature sensors 13, and the master controller 14 is configured to receive the surface temperatures of the workpieces 20 detected by the plurality of temperature sensors 13, compare the received surface temperatures of the workpieces 20 detected by the plurality of temperature sensors 13 with an expected temperature, that is, a predicted heating temperature of the surface of the workpiece 20, and then control the current intensity of the heating structure 12 according to the comparison result.

In the process of heating the workpiece 20, it is required to ensure that the surface of the workpiece 20 can be uniformly heated and can reach a desired temperature, so as to ensure that the workpiece 20 has good structural strength, wear resistance and impact resistance. Based on this, in the present embodiment, a plurality of temperature sensors 13 are provided to detect the temperatures of different positions of the workpiece 20, and the detected temperature information is transmitted to the main controller 14, and the main controller 14 controls the current intensity of the heating structure 12 according to the comparison result between the received temperature and the expected temperature. For example, if the temperature sensor 13 detects that the surface temperature of the workpiece 20 is lower than the desired temperature, the controller controls the heating structure 12 to increase the current intensity so that the workpiece 20 can be heated to the desired temperature; if the temperature sensor 13 detects that the surface temperature of the workpiece 20 is higher than the desired temperature, the controller controls the heating structure 12 to decrease the current intensity so that the heating structure 12 heats the workpiece 20 to the desired temperature. On one hand, the current intensity of the heating structure 12 at the corresponding position can be correspondingly adjusted through the temperature information detected by the temperature sensor 13, so that the induction heating device 10 can uniformly heat different positions of the workpiece 20; on the other hand, it is advantageous to determine whether or not the surface temperature of the workpiece 20 is heated to a desired temperature by simultaneously detecting the surface temperature of the workpiece 20 by the plurality of temperature sensors 13. That is, with the induction heating apparatus 10 provided in the present embodiment, it is possible to ensure that the surface of the workpiece 20 can be uniformly heated and the surface temperature of the workpiece 20 can be heated to a desired temperature, thereby improving the structural strength, wear resistance, and impact resistance of the workpiece 20. In addition, when the same workpiece 20 is heated, the power consumption of the induction heating apparatus 10 provided by the present embodiment is reduced by about 50% as compared with the power consumption of the heating apparatus in the related art.

It can be seen that the purpose of multipoint measurement can be achieved by providing a plurality of temperature sensors 13, so that the respective temperature sensors 13 can be mutually corrected to ensure the accuracy of detecting the surface temperature of the workpiece 20.

In some embodiments, the induction heating apparatus 10 further includes a driving structure (not shown) for driving the workpiece 20 to move relative to the bearing structure 11, so that the workpiece 20 can be heated by passing through the heating structure 12 in sequence, thereby achieving batch heating of the workpiece 20 and improving the processing efficiency of the workpiece 20.

Optionally, the driving structure may be a combined structure of a motor and a conveyor belt or a manipulator, as long as the driving structure can drive the workpiece 20 to move relative to the bearing structure, so that the workpiece 20 is sequentially heated by the heating structure 12. It should be noted that when the driving structure is a combination of a motor and a conveyor belt, the conveyor belt may be disposed on the bearing surface of the bearing structure 11 for bearing the workpiece 20, so that the workpiece 20 can be placed on the bearing surface and moved to the heating structure 12 to be heated by the conveyor belt.

Further, since the heating structure 12 is generally fixedly disposed on the carrying structure 11, the workpieces 20 can be heated by moving the workpieces 20 so that the workpieces 20 can pass through the heating structure 12 in sequence. In order that the surface temperature of the workpiece 20 detected by the temperature sensor 13 may be the surface temperature of the workpiece 20 heated by the heating structure 12, the heating structure 12 may be disposed adjacent to the temperature sensor 13 and in front of the temperature sensor 13 in the moving direction of the workpiece 20 (the X direction shown in fig. 1).

In some embodiments, the bearing structure 11 includes a bearing body 111 and a mounting frame 112 connected to the bearing body 111, the bearing body 111 is used for bearing the workpiece 20, the heating structure 12 is disposed on the bearing body 111, and the temperature sensor 13 is disposed on the mounting frame. That is, during the process of machining the workpiece 20, the manufacturer may place the workpiece 20 on the bearing surface of the bearing body 111 and pass the workpiece 20 through the heating structure 12 on the bearing body 111, thereby completing the heating operation of the workpiece 20.

In some embodiments, the bearing body 111 may be a bearing platform, and considering that the heating structure 12 and the mounting frame 112 are disposed on the bearing body 111, and the bearing body 111 is used for bearing the workpiece 20, therefore, in order not to affect the bearing body 111 to bear the workpiece 20, and simultaneously, to make the arrangement of the heating structure 12 and the mounting frame 112 on the bearing body 111 more compact, the bearing surface of the bearing body 111 for bearing the workpiece may be provided with a groove 113, and the mounting frame 112 and/or the heating structure 12 are/is disposed at the groove 113. That is, the mounting frame 112 may be disposed at the groove 113, the heating structure 12 may be disposed at the groove 113, or both the mounting frame 112 and the heating structure 12 may be disposed at the groove 113. The provision of the recess 113 in the carrier body 111 enables a portion of the mounting frame 112 and/or a portion of the heating structure 12 to be embedded in the recess 113, and the workpiece 20 can be evacuated, so that the workpiece 20 can pass through the heating structure 12 and the mounting frame 112 smoothly. Furthermore, as can be seen from the foregoing, whether or not the mounting bracket 112 and the heating structure 12 are both disposed at the recess, the heating structure 12 is always located in front of the mounting bracket 112 in the moving direction of the workpiece 20.

Further, heating structure 12 may be electrically connected to main controller 14 through the bottom of carrying body 111, and when heating structure 12 is disposed at groove 113 of carrying body 111, heating structure 12 may be electrically connected to main controller 14 through the bottom of groove 113. Like this, on the one hand the circuit setting of heating structure 12 is more reasonable, and on the other hand, can avoid the interconnecting link between heating structure 12 and the master controller 14 to appear on the bearing surface who bears main part 111 and influence the processing of work piece 20, simultaneously, also can avoid induction heating device 10 to melt the interconnecting link between heating structure 12 and the master controller 14 at the in-process of heating work piece 20 because the temperature of heating structure 12 is too high to influence induction heating device 10 and to work piece 20's heating or cause the incident. That is, electrically connecting heating structure 12 with main controller 14 through the bottom of carrying body 111 enables a reasonable routing of the connection between heating structure 12 and main controller 14.

In some embodiments, the plurality of temperature sensors 13 are disposed on the carrying structure 11 at intervals, that is, the plurality of temperature sensors 13 are disposed on the mounting frame 112 at intervals, for example, the number of the temperature sensors 13 may be two, three, four, five or more, which may be determined according to practical situations. A plurality of temperature sensors 13 are used to detect the temperature of different surfaces of the workpiece 20, or a plurality of temperature sensors 13 are used to detect the temperature of different locations on the same surface of the workpiece 20. That is, when the induction heating apparatus 10 only needs to heat one surface of the workpiece 20, the plurality of temperature sensors 13 may be used to detect the temperatures of different positions of the surface, thereby determining whether the surface of the workpiece 20 is uniformly heated and whether the surface temperature of the workpiece 20 reaches a desired temperature. When the induction heating apparatus 10 is required to heat two or more surfaces of the workpiece 20, the plurality of temperature sensors 13 may be used to detect the temperatures of different surfaces of the workpiece 20, so as to determine whether each heated surface of the workpiece 20 is uniformly heated and whether each surface temperature of the workpiece 20 reaches a desired temperature.

Wherein, when the workpiece 20 has a plurality of sides parallel to the moving direction of the workpiece 20, such as two sides, three sides, or four sides, etc., and the respective outer sides are not coplanar, the plurality of sides of the workpiece 20 constitute different surfaces of the workpiece 20. For example, assuming that the workpiece 20 is a rectangular parallelepiped columnar structure, the workpiece 20 may have four side surfaces parallel to the moving direction of the workpiece 20, the four side surfaces constituting different surfaces of the workpiece 20, and the temperature sensors 13 for detecting the temperatures of the different surfaces of the workpiece 20 may be understood as: the plurality of temperature sensors 13 are configured to detect at least two of the four side surfaces, for example, the plurality of temperature sensors 13 are configured to detect any three of the four side surfaces, and for example, the plurality of temperature sensors 13 are configured to detect the four side surfaces.

Taking the workpiece 20 as a rectangular parallelepiped columnar structure and heating all surfaces of the workpiece 20, the mounting frame 112 is a square frame with one open end, and the number of the temperature sensors 13 is three as an example. Specifically, the mounting frame 112 may include a first vertical rod 112a, a second vertical rod 112b and a cross rod 112c connected between the first vertical rod 112a and the second vertical rod 112b, which are disposed in parallel, and the first vertical rod 112a and the second vertical rod 112b are disposed on the bearing surface of the bearing body 111, and the first vertical rod 112a and the second vertical rod 112b are disposed on two opposite sides of the bearing body 111, so that the workpiece 20 can pass through a space between the first vertical rod 112a and the second vertical rod 112b to be borne on the bearing surface of the bearing body 111. The three temperature sensors 13 can be respectively disposed on the first vertical rod 112a, the second vertical rod 112b and the cross rod 112c, so that the three temperature sensors 13 can simultaneously detect the surface temperatures of the workpieces 20 on the bearing main body 111 in different directions. For example, the three temperature sensors 13 can simultaneously detect three surfaces of the workpiece 20 facing the first vertical rod 112a, the second vertical rod 112b and the cross rod 112c to obtain the temperatures of the three surfaces.

It should be noted that, since the number of the temperature sensors 13 is plural and each temperature sensor 13 is electrically connected to the main controller 14, the connection line between the temperature sensor 13 and the main controller 14 is many and complicated. In order to avoid the situation that the connection line between the temperature sensor 13 and the main controller 14 affects the operation of the induction heating device 10, and the connection line between the temperature sensor 13 and the main controller 14 is melted by the heating structure 12, thereby causing a safety accident, the present embodiment preferably fixes the connection line between the temperature sensor 13 and the main controller 14 on the mounting frame 112 along the periphery of the mounting frame 112 (i.e. along the first upright rod 112a, the cross rod 112c and the second upright rod 112 b).

Optionally, the temperature sensor 13 may be an infrared temperature sensor, a thermocouple temperature sensor, a thermistor temperature sensor, a platinum resistor temperature sensor, or the like, which may be selected according to actual situations, and this embodiment is not particularly limited thereto.

In order to realize that the detection positions of the plurality of temperature sensors 13 can be adjusted according to the size and shape of the workpiece 20 and the heating position of the workpiece 20, in some embodiments, the mounting frame 112 may be movably connected to the bearing main body 111, and/or the plurality of temperature sensors 13 may be movably disposed on the mounting frame 112 to adjust the positions of the temperature sensors 13 relative to the bearing main body 111, so as to adjust the detection positions of the temperature sensors 13 relative to the workpiece 20. That is, the mounting frame 112 is movably connected to the carrying body 111, or the temperature sensor 13 is movably disposed on the mounting frame 112, or the mounting frame 112 is movably connected to the carrying body 111, and the temperature sensor 13 is movably disposed on the mounting frame 112, which can be determined according to actual conditions.

Because in the process of heating the workpiece 20, the workpiece 20 passes through the mounting block 112, in order to avoid the influence of the position of the movable mounting block 112 on the operation of the heating structure 12, or because the movable mounting block 112 causes the mounting block 112 to drive the temperature sensor 13 to be away from the heating structure 12 together, the surface temperature of the workpiece 20 detected by the temperature sensor 13 is not the real-time temperature of the heated workpiece 20, and thus the processing yield of the workpiece 20 is influenced. Based on this, the present embodiment preferably adopts a mode that the mounting frame 112 is fixed on the bearing main body 111 and the plurality of temperature sensors 13 are movably arranged on the mounting frame 112 as an example. Specifically, the mounting frame 112 may be fixed to the bearing body 111 by a fixing member (e.g., a screw, a bracket, etc.), or may be fixed to the bearing body 111 by welding, which is not specifically required in this embodiment.

In some embodiments, in order to realize that the temperature sensor 13 is movable relative to the mounting frame 112 so as to adjust the angle of the temperature sensor 13 relative to the carrying body 111, a plurality of angle adjusting components 15 are disposed on the mounting frame 112, and the plurality of temperature sensors 13 are respectively disposed on the mounting frame 112 through the plurality of angle adjusting components 15, wherein the angle adjusting components 15 are used for adjusting the included angle α between the detection direction of the temperature sensor 13 and the preset direction. Here, the predetermined direction is a direction in which the angle adjustment member 15 faces the surface of the workpiece 20, that is, a direction of a ray perpendicular to a detection surface (the detection surface is the surface of the workpiece 20 detected by the temperature sensor 13 installed at the point) which is the aforementioned predetermined direction is made with a point at which the angle adjustment member 15 is installed on the mounting bracket 112 as a starting point. By providing the angle adjusting component 15, the temperature sensor 13 can flexibly control the size of the included angle α between the detection direction of the temperature sensor 13 and the preset direction, so that the temperature sensor 13 can correspondingly adjust the detection position of the temperature sensor 13 according to the size and shape of the workpiece 20 and the change of the heating position of the workpiece 20. For example, as can be seen from the foregoing, the mounting bracket 112 includes a first vertical rod 112a, a cross rod 112c and a second vertical rod 112b, the first vertical rod 112a, the cross rod 112c and the second vertical rod 112b are all provided with the temperature sensor 13, and then the first vertical rod 112a, the cross rod 112c and the second vertical rod 112b can be provided with the angle adjusting component 15 to provide the temperature sensor 13. In the initial state, the directions of the angle adjusting members 15 provided on the first upright 112a and the second upright 112b toward the surface of the workpiece 20 are parallel to the bearing surface of the bearing main body 111, and the directions of the angle adjusting members 15 provided on the cross bar 112c toward the surface of the workpiece 20 are perpendicular to the bearing surface of the bearing main body 111. When the angle needs to be adjusted, the angle adjusting component 15 on the first vertical rod 112a, the cross rod 112c and the second vertical rod 112b can be adjusted, so as to change the included angle of the temperature sensor 13 relative to the preset direction.

Alternatively, the angle adjusting member 15 may be a thrust ball universal joint, a constant velocity universal joint, a ball-and-cage universal joint, a tripod universal joint, a double-unit universal joint, or a universal wheel, and the like, which may be specifically selected according to actual conditions.

Further, the adjustable range of the included angle α between the preset direction and the detection direction of the temperature sensor 13 is 0 ° to 90 °, that is, the included angle α between the preset direction and the detection direction of the temperature sensor 13 is adjustable to 0 °, 15 °, 30 °, 45 °, 60 °, 75 °, or 90 °. This can enable the temperature sensor 13 to detect the temperature of each position on the detection surface of the workpiece 20.

In some embodiments, in order to enable the heating structure 12 to heat all surfaces of the workpiece 20, the heating structure 12 may be designed to be ring-shaped, that is, the heating structure 12 may be a ring-shaped structure, so that the workpiece 20 can be heated through the ring-shaped structure, and thus all surfaces of the workpiece 20 can be heated. It is understood that in other embodiments, when the induction heating device 10 only needs to heat one plane of the workpiece 20, the heating structure 12 may be designed to be linear; when the induction heating device 10 is used to heat only one arc surface of the cylindrical workpiece 20, the heating structure 12 may be designed to be arc-shaped. That is, the shape of the heating structure 12 may be a straight line, an arc, a ring, or a curve, and the like, and may be determined according to the shape of the heating surface of the workpiece 20, and the embodiment is not particularly limited.

Since the workpiece 20 may be in the shape of a rectangular parallelepiped, a cylinder, or a gear, when the surface of the non-uniform cylindrical workpiece 20 is heated, for example, when the surface of the gear is heated, different power frequencies are required for induction heating at different positions of the workpiece 20 for achieving a uniform heating depth. For example, in the case of a workpiece as a gear, since the gear has tooth tops and tooth bottoms, in order to heat the surfaces at the tooth tops and the tooth bottoms to the same temperature, the heating structures 12 having different power supply frequencies are used to heat the gear. Based on this, referring to fig. 4 in particular, in some embodiments, the heating structure 12 includes a dual-frequency power supply 121 and an induction coil 122 electrically connected to the dual-frequency power supply 121, the dual-frequency power supply 121 is electrically connected to the main controller 14, the induction coil 122 is used for heating the workpiece 20, and the shape of the induction coil 122 can be determined according to the shape of the heating surface of the workpiece 20, that is, as mentioned above, the shape of the induction coil 122 can be a linear type, an arc type, an annular type, a curved type, or the like, and can be determined according to actual situations. The dual-frequency power supply 121 is adopted, so that when the induction heating device 10 heats the non-uniform columnar workpiece 20, the power supplies with different frequencies can be adopted for heating according to different positions of the workpiece 20, the surface of the non-uniform columnar workpiece 20 is uniformly heated, the heating treatment effect is good, the distortion of the workpiece is small, the surface hardness is improved, the hardening layer is deepened, the uniformity of the surface hardness and the depth of the hardening layer is also ensured, and the performance index of the workpiece is favorably improved. In addition, the dual-frequency power supply 121 is adopted, and the workpiece 20 can be simultaneously subjected to induction heating by adopting two currents with different frequencies, so that the purpose of heating the corresponding part of the workpiece 20 by using different required frequencies is achieved, and further the heating process of the workpiece 20 is completed in the same stage, so that the heating time can be shortened, the heating efficiency can be improved, and the time, the labor and the cost are saved.

Further, the dual-frequency power supply 121 may include any two of an ultra-high frequency power supply, a super audio frequency power supply, a medium frequency power supply, and a power frequency power supply. Since the induction heating apparatus 10 provided in this embodiment can be used for processing a workpiece 20 having a large size, it is preferable that the dual-frequency power supply 121 is formed by synchronously coupling the intermediate-frequency power supply 121a and the high-frequency power supply 121 b. The medium-frequency power supply 121a is used for heating a position on the workpiece 20 far away from the induction coil 122, and the high-frequency power supply 121b is used for heating a position on the workpiece 20 near the induction coil 122. For example, when the workpiece 20 is a non-uniform cylinder of a gear shape, the medium frequency power supply 121a is used to heat the tooth root of the workpiece 20, and the high frequency power supply 121b is used to heat the tooth tip of the workpiece 20.

Specifically, the intermediate frequency power supply 121a and the high frequency power supply 121b form the dual frequency power supply 121 by being connected in parallel. The principle is roughly as follows: the intermediate frequency power supply 121a passes through the first transformer a, then passes through the first resonant capacitor B, and finally is connected to the double-frequency coupler C; and after the high-frequency power supply 121b passes through the second transformer D, the positive current sequentially passes through the first resonance coil E and the second resonance coil F, and the negative current sequentially passes through the third resonance coil G and the fourth resonance coil H, wherein a second resonance capacitor I is connected between the first resonance coil E and the second resonance coil F and between the third resonance coil G and the fourth resonance coil H, and the positive current passing through the second resonance coil F and the negative current passing through the fourth resonance coil H are finally connected to the dual-frequency coupler C and joined with the medium-frequency power supply 121a at the dual-frequency coupler C. After the intermediate frequency power source 121a and the high frequency power source 121b are converged at the dual frequency coupler C, they are supplied to the induction coil 122 through the third transformer J, so that the induction coil 122 can heat the workpiece 20.

Referring to fig. 5, in some embodiments, the master 14 includes a temperature monitoring unit 141, a regulating unit 142, and a dual-band sensing control unit 143. The temperature monitoring unit 141 is electrically connected to the temperature sensor 13, the regulating unit 142 is electrically connected to the temperature monitoring unit 141 and the dual-frequency sensing control unit 143, and the dual-frequency sensing control unit 143 is electrically connected to the dual-frequency power supply 121 of the heating structure 12. The temperature monitoring unit 141 is configured to control the temperature sensor 13 to perform temperature detection on the surface of the workpiece 20 and receive surface temperature information of the workpiece 20 detected by the temperature sensor 13, then feed back the received surface temperature information of the workpiece 20 detected by the temperature sensor 13 to the regulating unit 142, after the regulating unit 142 receives the surface temperature information of the workpiece 20 detected by the temperature sensor 13, compare the received surface temperature information with an expected temperature, and regulate and control the dual-frequency induction control unit 143 according to a comparison result, so as to control current intensity of the dual-frequency power supply 121 of the heating structure 12 (i.e., output frequency and output power of the dual-frequency power supply 121), thereby controlling heating intensity of the induction coil 122, and realizing regulation and control of the surface temperature when the workpiece 20 is heated.

That is, after the regulating unit 142 compares the surface temperature information fed back by the temperature monitoring unit 141 with the expected temperature, if the surface temperature of the workpiece 20 is found to be lower than the expected temperature, the regulating unit 142 controls the dual-frequency induction control unit 143 to increase the current intensity of the dual-frequency power supply 121 of the heating structure 12, so as to increase the heating intensity of the induction coil 122, and increase the surface temperature of the workpiece 20 after being heated to the expected temperature; if the surface temperature of the workpiece 20 is found to be higher than the desired temperature, the control unit 142 controls the dual-frequency induction control unit 143 to reduce the current intensity of the dual-frequency power supply 121 of the heating structure 12, so as to reduce the heating intensity of the induction coil 122, so that the heated surface temperature of the workpiece 20 is reduced to the desired temperature.

Specifically, the dual frequency sensing control unit 143 includes a first sub-control unit 143a and a second sub-control unit 143b, the first sub-control unit 143a is used for controlling the current intensity of the intermediate frequency power supply 121a, and the second sub-control unit 143b is used for controlling the current intensity of the high frequency power supply 121 b. Through the mutual cooperation between the first sub-control unit 143a and the second sub-control unit 143b, the current intensities of the medium-frequency power supply 121a and the high-frequency power supply 121b can be respectively controlled, so that the heating intensity of the induction coil 122 can be controlled, the surface of the workpiece 20 can be uniformly heated, the surface temperature of the workpiece 20 can be heated to a desired temperature, and the purposes of improving the structural strength, the wear resistance and the impact resistance of the workpiece 20 are achieved.

It is understood that the master controller 14 can be integrated on the motherboard of the control box, or the master controller 14 can be integrated on the motherboard of the terminal device (e.g., mobile phone, computer, etc.).

In some embodiments, in order to enable the processing personnel to know the comparison result of the master controller 14 in time, the induction heating apparatus 10 may further include a display 16 provided with a control button, and the display 16 is configured to display the operation condition of the induction heating apparatus 10, for example, the display 16 may display the surface temperature of the workpiece 20 detected by each temperature sensor 13 in real time and display information such as which areas of the workpiece 20 are processed, where the heating temperature reaches the expected temperature, and which areas do not reach or exceed the expected temperature, so as to facilitate the processing personnel to cut off the portions of the workpiece 20 that do not meet the heating requirement according to the processing condition of the workpiece 20 displayed by the display. The control buttons may be used to control the start or stop of the entire induction heating unit 10 or the start or stop of the main controller 14, the heating structure 12 or the temperature sensor 13 alone.

The heating process of the induction heating apparatus 10 of the present embodiment is explained below:

first, before heating the workpiece 20, the induction heating apparatus 10 is started, and then the workpiece 20 is placed on the bearing surface of the bearing main body 111, so that the workpiece 20 is driven by the driving structure to move relative to the bearing main body 111 and sequentially pass through the induction coil 122 and the mounting frame 112 of the heating structure 12. Then, in the process that the workpiece 20 passes through the induction coil 122, the temperature sensors 13 on the mounting rack 112 detect the temperatures of different positions on each surface of the workpiece 20 in real time, and transmit the detected surface temperature information to the temperature monitoring unit 141, the temperature monitoring unit 141 feeds back the received surface temperature information to the regulating unit 142, the regulating unit 142 compares the received surface temperature information with the expected temperature, and controls the first sub-control unit 143a and the second sub-control unit 143b of the dual-frequency induction control unit 143 according to the comparison result, so as to control the current intensities of the medium-frequency power supply 121a and the high-frequency power supply 121b, and further control the heating intensity of the induction coil 122, so that the surface temperature of the heated workpiece 20 can reach the expected temperature and the surface of the workpiece 20 can be uniformly heated, thereby improving the structural strength of the workpiece 20, Abrasion resistance and impact resistance.

The induction heating device disclosed by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained herein by applying a specific example, and the description of the above embodiment is only used to help understand the induction heating device and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be changes in the specific embodiments and the application range, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. An induction heating apparatus, characterized in that the induction heating apparatus comprises:

a bearing structure for bearing a workpiece;

2. The induction heating unit of claim 1, wherein the plurality of temperature sensors are spaced apart on the support structure, and wherein the plurality of temperature sensors are configured to detect temperatures of different surfaces of the workpiece, or wherein the plurality of temperature sensors are configured to detect temperatures of different locations on a same surface of the workpiece.

3. The induction heating apparatus according to claim 1, wherein the carrying structure comprises a carrying body for carrying the workpiece and a mounting bracket connected to the carrying body, the heating structure being provided on the carrying body, the plurality of temperature sensors being provided on the mounting bracket.

4. An induction heating unit as claimed in claim 3, wherein said mounting frame is movably connected to said carrying body and/or said plurality of temperature sensors are movably arranged on said mounting frame to adjust the position of said temperature sensors relative to said carrying body.

5. The induction heating apparatus according to claim 3, wherein a plurality of angle adjusting members are provided on the mounting frame, the plurality of temperature sensors are provided on the mounting frame through the plurality of angle adjusting members, respectively, the angle adjusting members are configured to adjust an included angle α between a detection direction of the temperature sensors and a preset direction, the included angle α is greater than or equal to 0 ° and less than or equal to 90 °, and the preset direction is a direction in which the angle adjusting members face the surface of the workpiece.

6. An induction heating unit as claimed in claim 3, characterized in that the carrier body is provided with a recess, at which recess the mounting frame and/or the heating structure is/are provided.

7. The induction heating unit according to any one of claims 1 to 6, wherein the heating structure is a ring-shaped structure for passing the workpiece therethrough.

8. The induction heating unit of any one of claims 1-6, wherein said heating structure comprises a dual frequency power supply and an induction coil electrically connected to said dual frequency power supply, said dual frequency power supply being electrically connected to said main controller, said induction coil being configured to heat said workpiece.

9. The induction heating unit of any one of claims 1 to 6, further comprising a drive arrangement for driving movement of the workpiece relative to the carrier arrangement.

10. The induction heating unit of claim 9, wherein the heating structure is disposed adjacent to and in front of the temperature sensor in a direction of movement of the workpiece.