Eddy current heating device for wheel thermal assembly

Abstract

The present invention relates to an eddy current heating device for hot assembly of a wheel body in the technical field of brake wheel assembly in the lifting industry. The device comprises a movable trolley and a workbench. A support frame plate is vertically fixed to the workbench, a horizontal frame is fixed to the top of the support frame plate, and the workbench is divided into a preheating station, a heating station and a testing station in sequence along the longitudinal direction of the workbench; the front side of the upper table of the workbench is respectively provided with guide rails along the transverse direction of the workbench corresponding to the preheating station, the heating station and the testing station, and the movable trolley comprises a vehicle body, and guide wheels corresponding to the clamping guide rails are installed on the lower surface of the vehicle body; the horizontal frame is respectively provided with telescopic cylinders with telescopic rod ends downward corresponding to the preheating station, the heating station and the testing station, the telescopic rod ends of the preheating station and the heating station are coaxially fixed with a cap-type profiling cover, the cover wall of the cap-type profiling cover is surrounded by an induction heating coil, and the telescopic rod end of the testing station is connected with a temperature detection device; the eddy current heating device can improve the heating effect and efficiency of the wheel body.

Description

Technical Field

[0001] The invention relates to the technical field of brake wheel assembly in the lifting industry, and in particular to an eddy current heating device for hot assembly of a wheel body. Background Art

[0002] With the development of the lifting industry, customers have increasingly stringent requirements on product accuracy, appearance and service life. As a key guarantee for safe braking of cranes, the reliability and quality of the brake wheel play a vital role.

[0003] In the lifting industry, the matching tolerances of brake wheels, reducers, motor shafts, etc. are all interference fit tolerances. During assembly, the brake wheel is heated and expanded to perform hot assembly. Considering factors such as technical conditions, assembly efficiency and manufacturing costs, the traditional heating method is to extend the heating source into the inner hole of the brake wheel body for heating. Due to factors such as the brake wheel structure and size, the heating process often results in uneven heating, more thermal stress, and local high temperature color change on the brake surface, which leads to a decrease in the surface hardness of the brake wheel, seriously affecting the assembly quality and service life. In addition, the heating efficiency is low and there are great safety hazards. Such problems are common problems that need to be urgently solved in the industry. Summary of the invention

[0004] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the present invention discloses an eddy current heating device for wheel body thermal assembly, which can improve the heating effect and efficiency of the wheel body.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] A eddy current heating device for hot assembly of a wheel body comprises a movable trolley and a workbench, a support frame plate is vertically fixed on the rear side of the upper table surface of the workbench, a horizontal box frame is fixed on the top of the support frame plate, and the space between the horizontal box frame and the workbench is divided into a preheating station, a heating station and a testing station in the longitudinal direction of the workbench; the front side of the upper table surface of the workbench is respectively provided with guide rails along the transverse direction of the workbench corresponding to the preheating station, the heating station and the testing station, the movable trolley comprises a vehicle body on the upper surface for flatly placing the wheel body to be heated, and guide wheels corresponding to the clamping guide rails are installed on the lower surface of the vehicle body; the horizontal box frame is respectively provided with telescopic cylinders with telescopic rod ends downward corresponding to the preheating station, the heating station and the testing station, the telescopic rod ends of the preheating station and the heating station are coaxially fixed with cap-type contoured covers, the cover wall of the cap-type contoured cover is surrounded by an induction heating coil, and the telescopic rod end of the testing station is connected to a temperature detection device.

[0007] Furthermore, the cap-shaped contoured cover is configured as a composite flexible high-temperature resistant insulating shell having an annular cavity, and the induction heating coil is arranged in the annular cavity and surrounds the cap-shaped contoured cover axially for multiple turns.

[0008] Furthermore, the induction heating coil at the lower end of the cap-type contoured cover is radially arranged in multiple layers.

[0009] Furthermore, a temperature probe is suspended at the center of the hat-type contoured cover.

[0010] Furthermore, the telescopic rod end of the detection station is rotatably mounted with a rotary sleeve, and the temperature detection device includes a plurality of temperature measuring ends evenly mounted around the outer wall of the rotary sleeve.

[0011] Furthermore, the support frame plate surfaces are respectively installed with distance sensors corresponding to the preheating station, the heating station and the detection station, and a visual camera is installed on the lower surface of one end of the horizontal box frame; the horizontal box frame is provided with a control device which is respectively connected to the control signals of the distance sensor, the visual camera, the telescopic cylinder, the induction heating coil and the temperature detection device.

[0012] Furthermore, the guide rail comprises two straight rail sections which are spaced apart and arranged side by side, and the moving trolley is provided with four guide wheels corresponding to the two straight rail sections.

[0013] Furthermore, a support plate with a surface corresponding to the surface of the workbench is provided in front of the workbench, and a slide rail perpendicular to the guide rail is provided on the upper surface of the support plate. A movable plate that can move along the slide rail is clamped on the slide rail, and a curved rail section for turning and docking two adjacent slide rails is fixed on the upper surface of the movable plate.

[0014] Furthermore, the side edge of the frame support plate corresponding to the workbench is rotatably connected to the front top end of the workbench, a support rod is hinged at the middle of the front side of the workbench, and the outer rod end of the support rod correspondingly abuts against the support frame support plate.

[0015] Furthermore, the steps for using the eddy current heating equipment are as follows: first, place the guide wheel of the mobile trolley corresponding to the guide rail of the preheating station, and place the wheel body to be heated flat on the middle of the upper surface of the trolley body, then move the mobile trolley to the bottom of the cap-type contoured cover of the preheating station, and control the corresponding telescopic cylinder to drive the cap-type contoured cover to move downward until it is close to the set position of the outer wall of the hole sleeve in the wheel body to be heated, and then start the induction heating coil of the corresponding cap-type contoured cover for preheating. After the preheating time is reached, transfer the mobile trolley to the guide rail of the heating station, and also move to the position to put down the corresponding cap-type contoured cover for heating. After the heating is completed, transfer the mobile trolley to the detection station, control the corresponding telescopic cylinder to put down the temperature detection device, and extend it into the inner hole of the wheel body to be heated to check the temperature uniformity. If it is uneven, return to the heating station for uniform heating. After the temperature is uniform, remove the wheel body to complete a working cycle.

[0016] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects:

[0017] The eddy current heating equipment for hot assembly of a wheel body disclosed in the present invention realizes local rapid heating of the assembly part of the workpiece by arranging a cap-type contoured cover to fit the shape of the workpiece, which can ensure relatively uniform heating and avoid local overheating of thin-walled parts due to skin effect, thereby greatly improving the appearance quality and service life of the product; by arranging different workstations to independently control operations, preheating first and then heating, it can prevent overheating damage, reduce thermal stress, and avoid cracks. The added inspection station can also further ensure the uniformity of heating. The wheel body is conveniently transferred by a mobile cart for sequential operation, which realizes continuous operation of the entire equipment and greatly improves the operating efficiency. It is low in cost and energy consumption, the overall heating efficiency is improved by at least 200%, the cost is reduced by about 50%, and the comprehensive service life of the product is improved by about 15%, solving the assembly quality problem in the industry for decades. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the implementation structure of the present invention;

[0019] Figure 2 is a schematic cross-sectional structural diagram of the cap-type contoured cover;

[0020] Figure 3 is a schematic diagram of the structure of the hat-type contoured cover corresponding to the wheel body heating;

[0021] Figure 4 is a schematic diagram of the connection structure of the curved track section;

[0022] Figure 5 It is a schematic diagram of the connection structure between the support plate and the workbench.

[0023] In the figure: 1. workbench; 2. mobile trolley; 3. distance sensor; 4. wheel body; 5. cross box frame; 6. telescopic cylinder; 7. support frame plate; 8. hat-type contour cover; 9. visual camera; 10. temperature detection device; 11. guide rail; 12. induction heating coil; 13. frame support plate; 14. slide rail; 15. mobile plate; 16. curved rail section; 17. support rod. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction: Embodiment 1:

[0025] Combined with Figure 1-3The eddy current heating equipment for wheel body hot assembly described herein comprises a mobile trolley 2 and a workbench 1. A support frame plate 7 is vertically fixed on the rear side of the upper surface of the workbench 1. A horizontal frame 5 is fixed on the top of the support frame plate 7 to ensure that the horizontal frame 5 is firmly supported. The space between the horizontal frame 5 and the workbench 1 is divided into a preheating station, a heating station and a testing station in sequence along the longitudinal direction of the workbench 1; the front side of the upper surface of the workbench 1 is respectively provided with guide rails 11 along the transverse direction of the workbench 1 corresponding to the preheating station, the heating station and the testing station. The mobile trolley 2 shown herein comprises a vehicle body on the upper surface for laying the wheel body 4 to be heated flatly, and a guide wheel corresponding to the clamping guide rail 11 is installed on the lower surface of the vehicle body. The guide rail 11 is used for longitudinal positioning, and at the same time, it is convenient for the mobile trolley 2 to move along the guide rail 11 to deliver the wheel body 4 to be heated; as needed, the guide rail 11 comprises two straight rail sections spaced apart and arranged side by side, and the mobile trolley 2 is provided with four guide wheels corresponding to the two straight rail sections to ensure stable support movement;

[0026] The horizontal box frame 5 is respectively equipped with telescopic cylinders 6 with telescopic rod ends downward corresponding to the preheating station, the heating station and the testing station. The telescopic cylinder 6 is generally set as a hydraulic cylinder or an electric cylinder to facilitate the control of vertical telescopic extension. The telescopic rod ends of the preheating station and the heating station are coaxially fixed with a cap-type contoured cover 8. The specific structure is shown in the attached Figure 2 As shown, the diameter of the upper cylinder is smaller than that of the lower cylinder, and the middle part is tapered. Figure 3As shown, it can just extend into the wheel body 4 and cover the outside of the inner hole sleeve to ensure uniform heating and avoid local overheating. The cover wall of the cap-type profiling cover 8 is surrounded by an induction heating coil 12. The principle of magnetic field eddy current induction heating is used. According to the local heating shape of the workpiece, the density, wire number and winding method of the internal induction wire are arranged and combined in different ways to achieve uniform change of the magnetic field and controllable temperature rise rate; according to needs, the cap-type profiling cover 8 is set as a composite flexible high-temperature resistant insulating shell with an annular cavity, and the induction heating coil 12 is placed in the annular cavity and surrounds the cap-type profiling cover 8 axially for multiple turns to ensure that the cap-type profiling cover 8 is flexible. It can also change the shape of the cap-type profiling cover 8 according to the shape of different heated workpieces, fit the local heating part of the workpiece, and achieve flexible and rapid heating. The connection of the cap-type profiling cover 8 can adopt a quick plug-in method, and simple plug-in and pull-out can complete rapid power on and off, which is convenient to operate, has a low error rate, and is highly safe; in addition, the induction heating coil 12 at the lower end of the cap-type profiling cover 8 is radially arranged with multiple layers, adopts magnetic field superposition technology, and combines the brake wheel process The magnetic field is superimposed when the wall thickness of the bottom heating area of ​​the workpiece increases, and the magnetic field sensing range is increased, so that the temperature rise of the overall heating area remains at the same rate, and the magnetic field superposition technology can be adjusted and used at any time according to the workpiece situation; in addition, the temperature and time of induction heating can be directly set and controlled, and a temperature probe can be hoisted in the center of the cap-type contoured cover 8 to perform real-time temperature detection feedback to ensure that the temperature control is more accurate; the telescopic rod end of the detection station is connected with a temperature detection device 10 for detecting the uniformity of heating of the inner hole of the wheel body 4; as needed, the telescopic rod end of the detection station is rotatably covered with a rotary sleeve, and the temperature detection device 10 includes a plurality of temperature measuring ends uniformly installed on the outer wall of the rotary sleeve, and the temperature measuring end can be set as a temperature probe for contact temperature measurement, or as an infrared probe for non-contact temperature measurement. A plurality of temperature measuring ends are uniformly set so that the temperature of each point can be detected. The more the number of settings, the more detection points there are. Of course, it is also possible to save costs by setting one or two. By simply rotating the rotary sleeve, the detection position can be changed to achieve multi-point temperature detection.

[0027] According to needs, distance sensors 3 are installed on the surface of the support frame plate 7 corresponding to the preheating station, heating station and detection station respectively. When the mobile trolley 2 is set to automatically control the movement of the self-propelled trolley, the feedback information of the distance sensor 3 can be used to automatically control the wheel body 4 to be transported to the right position. A visual camera 9 is installed on the lower surface of one end of the horizontal box frame 5. The visual camera 9 can not only check the telescopic lifting height of the telescopic cylinder 6, but also can take pictures and monitor the working conditions of each station; a control device is provided in the horizontal box frame 5, which is respectively connected to the control signals of the distance sensor 3, the visual camera 9, the telescopic cylinder 6, the induction heating coil 12 and the temperature detection device 10. By independently controlling the actions between each station and the central master control of the control device, the fully automatic intelligent temperature control and flexible heating of the workpiece can be realized.

[0028] In implementing the eddy current heating device for wheel body hot assembly of the present invention, firstly, the guide wheel of the mobile trolley 2 is placed corresponding to the guide rail 11 of the preheating station, and the wheel body 4 to be heated is placed flat on the middle of the upper surface of the trolley body, and then the mobile trolley 2 is moved to the bottom of the cap-type profiling cover 8 of the preheating station, and the corresponding telescopic cylinder 6 is controlled to drive the cap-type profiling cover 8 to move down until it is close to the set position of the outer wall of the inner hole sleeve of the wheel body 4 to be heated, and then the induction heating coil 12 of the corresponding cap-type profiling cover 8 is started for preheating, and the preheating temperature rise rate is generally controlled at 40℃ / min~60℃ / min, and the preheating temperature is 60℃. After the preheating time is reached, the mobile trolley 2 is transferred to the guide rail 11 of the heating station, and the mobile trolley 2 is also moved to the bottom of the preheating station. The corresponding cap-type profiling cover 8 is put down in place for heating. The heating temperature rising speed is generally controlled at 80℃ / min~120℃ / min. After the heating is completed, the mobile trolley 2 is transferred to the detection station, and the temperature detection device 10 is put down by controlling the corresponding telescopic cylinder 6, and inserted into the inner hole of the wheel body 4 to be heated to check the temperature uniformity. If it is uneven, return to the heating station for uniform heating. In actual operation, the cap-type profiling cover 8 can ensure uniform heating. When individual unevenness occurs, it needs to be reheated. When heating, the prevention position of the wheel body 4 can be adjusted by rotating, or the cap-type profiling cover 8 can be adjusted by rotating. After the temperature is uniform, the wheel body 4 is removed to complete a working cycle. Embodiment 2:

[0029] Although the guide rail 11 is convenient for sending the mobile trolley 2 into position from the outside, it is troublesome to transfer each station. Figure 4 and 5 As shown, on the basis of Example 1, a support plate 13 is provided in front of the workbench 1, and a slide rail 14 is provided on the upper plate surface of the support plate 13, which is perpendicular to the guide rail 11. A movable plate 15 that can move along the slide rail 14 is clamped on the slide rail 14, and a curved rail section 16 for turning and docking two adjacent slide rails 14 is fixed on the upper plate surface of the movable plate 15. When the movable trolley 2 is transferred to the adjacent workstation, it is only necessary to move the movable plate 15 and make the two ends of the curved rail section 16 correspond to the two guide rails 11 of the adjacent workstation; according to needs, the side edge of the support plate 13 corresponding to the workbench 1 is rotatably connected to the top end of the front side of the workbench 1, and a support rod 17 is hinged in the middle part of the front side of the workbench 1, and the outer rod end of the support rod 17 corresponds to the support support plate 13. When the movable trolley 2 needs to be transferred to the adjacent workstation, the support plate 13 is rotated and lifted, and then the support rod 17 is used to support it stably. When it is not needed, the support plate 13 can be put down.

[0030] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. An eddy current heating device for wheel body thermal assembly, characterized by: The invention comprises a movable trolley (2) and a workbench (1), wherein a support frame plate (7) is vertically fixed on the rear side of the upper surface of the workbench (1), a horizontal frame (5) is fixed on the top of the support frame plate (7), and the space between the horizontal frame (5) and the workbench (1) is divided into a preheating station, a heating station and a testing station in sequence along the longitudinal direction of the workbench (1); the front side of the upper surface of the workbench (1) is respectively provided with guide rails (11) along the transverse direction of the workbench (1), corresponding to the preheating station, the heating station and the testing station, and the movable trolley (2) is fixed to the upper surface of the workbench (1). ) comprises a vehicle body whose upper surface is used to lay flat the wheel body (4) to be heated, and a guide wheel corresponding to the clamping guide rail (11) is installed on the lower surface of the vehicle body; the transverse box frame (5) is respectively installed with a telescopic cylinder (6) with the telescopic rod end facing downward corresponding to the preheating station, the heating station and the detection station, and the telescopic rod ends of the preheating station and the heating station are coaxially fixed with a cap-type profiling cover (8), and the cover wall of the cap-type profiling cover (8) is surrounded by an induction heating coil (12), and the telescopic rod end of the detection station is connected to a temperature detection device (10); The guide rail (11) comprises two straight rail sections spaced apart and arranged side by side, and the movable trolley (2) is provided with four guide wheels corresponding to the two straight rail sections; a support plate (13) is provided in front of the workbench (1) and its surface corresponds to the upper surface of the workbench (1); a slide rail (14) is provided on the upper surface of the support plate (13) and is perpendicular to the guide rail (11); a movable plate (15) capable of moving along the slide rail (14) is clamped on the slide rail (14); a curved rail section (16) for turning and docking two adjacent slide rails (14) is fixed on the upper surface of the movable plate (15); the side edge of the support plate (13) corresponding to the workbench (1) is rotatably connected to the top end of the front side of the workbench (1); a support rod (17) is hingedly connected to the middle part of the front side of the workbench (1); the outer rod end of the support rod (17) corresponds to the support support plate (13).

2. The eddy current heating device for wheel heat assembly according to claim 1 is characterized in that: The cap-shaped contoured cover (8) is configured as a composite flexible high-temperature resistant insulating shell having an annular cavity, and the induction heating coil (12) is arranged in the annular cavity and surrounds the cap-shaped contoured cover (8) multiple times along the axial direction.

3. The eddy current heating device for wheel thermal assembly according to claim 1 is characterized in that: The induction heating coil (12) at the lower end of the cap-type contoured cover (8) is provided with multiple layers in the radial direction.

4. The eddy current heating device for wheel thermal assembly according to claim 1 is characterized in that: A temperature probe is suspended at the center of the cap-type contoured cover (8).

5. The eddy current heating device for wheel heat assembly according to claim 1 is characterized in that: The telescopic rod end of the detection station is rotatably mounted with a rotary sleeve, and the temperature detection device (10) comprises a plurality of temperature measuring ends evenly mounted around the outer wall of the rotary sleeve.

6. The eddy current heating device for wheel heat assembly according to claim 1 is characterized in that: The support frame plate (7) is provided with distance sensors (3) on the surface corresponding to the preheating station, the heating station and the detection station respectively, and a visual camera (9) is installed on the lower surface of one end of the horizontal box frame (5); and a control device is provided in the horizontal box frame (5) and is connected to the control signals of the distance sensor (3), the visual camera (9), the telescopic cylinder (6), the induction heating coil (12) and the temperature detection device (10) respectively.

7. The eddy current heating device for wheel thermal assembly according to claim 1 is characterized in that: The steps for using the eddy current heating device are as follows: first, the guide wheel of the mobile trolley (2) is placed on the guide rail (11) of the preheating station, and the wheel body (4) to be heated is placed flat on the middle of the upper surface of the trolley body, and then the mobile trolley (2) is moved to the position directly below the cap-type profiling cover (8) of the preheating station, and the corresponding telescopic cylinder (6) is controlled to drive the cap-type profiling cover (8) to move downward until it is close to the set position of the outer wall of the inner hole sleeve of the wheel body (4) to be heated, and then the induction heating coil (12) of the corresponding cap-type profiling cover (8) is started. Preheating is performed. When the preheating time is reached, the movable carriage (2) is transferred to the guide rail (11) of the heating station and is also moved to the position to put down the corresponding cap-type contoured cover (8) for heating. After the heating is completed, the movable carriage (2) is transferred to the detection station, and the temperature detection device (10) is put down by controlling the corresponding telescopic cylinder (6) to extend into the inner hole of the wheel body (4) to be heated to check the temperature uniformity. If it is uneven, it returns to the heating station for uniform heating. After the temperature is uniform, the wheel body (4) is removed to complete a working cycle.

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