Frame inductor for heating permanent magnet workpiece

Abstract

According to the frame inductor for heating the permanent magnet workpieces, the height of the induction coil copper pipe in the frame inductor can be adjusted according to the heights of different permanent magnet workpieces. The maximum height can be adjusted to the minimum height, and all the permanent magnet workpieces within the height range can be heated through the same frame inductor so as to be suitable for external heating of various permanent magnet workpieces with different heights. And an infrared thermometer mounting bracket is designed on the frame inductor, and an infrared temperature measuring hole is reserved in an induction coil, so that the frame inductor can be interconnected with an induction heating power supply to realize'constant-temperature closed-loop PID (Proportion Integration Differentiation) operation 'automatic temperature control, and the temperature uniformity of a permanent magnet workpiece is more effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy automobile parts manufacturing, and specifically to a frame inductor for heating a permanent magnet workpiece, which is applied to the occasions of external induction heating of permanent magnet workpieces with different heating requirements to solidify glue on the surface of the permanent magnet workpiece. Background Art

[0002] New energy vehicle drive motors and ABS (anti-lock braking system), EPS (electric power steering system) and other automotive parts require the use of permanent magnet workpieces, such as NdFeB permanent magnets. Due to the increasing demand for new energy vehicles and the continuous technological innovation, the size and structure of permanent magnet workpieces have become more diverse, and higher requirements have been placed on heating.

[0003] At present, most of the permanent magnet workpieces are heated by resistive ovens for glue curing, that is, electrical energy is converted into heat by using resistance wires. The heat is transferred to the permanent magnet workpiece that needs to be heated indirectly by heat transfer (conduction, convection, radiation), so as to achieve the purpose of heating the permanent magnet workpiece for glue curing.

[0004] The resistance oven baking heating method has the following disadvantages:

[0005] 1. When the door of the resistance oven is opened, most of the heat in the oven is dissipated into the air, causing a waste of electric energy, slow heating speed, extremely long baking time, and too long glue curing time, affecting the curing effect; 2. Because the permanent magnet workpiece is placed in the baking oven as a whole for heating, it is impossible to achieve online automated production of the assembly line; 3. Due to the long-term high-temperature aging of the resistance wire, the maintenance workload of the furnace is large and the maintenance cost is high; when the resistance wire is partially damaged and cannot work normally, the heating temperature in the furnace cannot be accurately controlled, thus affecting the quality of the permanent magnet workpiece.

[0006] The prior art also uses induction heating to make the permanent magnet workpiece generate eddy current effect and heat. Specifically, the induction heating power supply passes high-frequency current to the inductor, and an alternating magnetic field will be generated inside the inductor. The permanent magnet workpiece placed in the alternating magnetic field in the inductor can generate induced electromotive force induction, and an alternating current is generated on the surface of the permanent magnet workpiece, so that the permanent magnet workpiece is quickly heated. The permanent magnet workpiece is heated from room temperature to the target temperature (135±3)℃. The temperature needs to be controlled by ±5℃ during the heating process. After reaching the target temperature, the temperature uniformity needs to reach ±3℃, and then keep warm for 5 minutes. After completion, the equipment stops working. The entire heating production cycle is about 10 minutes, so that the glue between the multiple stacked permanent magnet blocks is accelerated to solidify.

[0007] The inductor used in conventional induction heating is a fixed inductor. Due to the fixed shape and structure of the inductor itself, the alternating current generated on the permanent magnet workpiece will be unevenly distributed, resulting in uneven temperature on the permanent magnet workpiece, so the glue will not cure well, thus affecting the performance of the permanent magnet workpiece. In addition, conventional inductors can only heat permanent magnet workpieces of a specific height. For permanent magnet workpieces with different heating height requirements, they can only be heated by frame inductors of another size. As a result, each specification of permanent magnet workpiece needs to be equipped with an inductor of the corresponding size, which cannot achieve one-to-many and is difficult to effectively utilize resources. Utility Model Content

[0008] The technical problems to be solved by the utility model are: the glue will not solidify well due to the uneven temperature on the permanent magnet workpiece, thus affecting the performance of the permanent magnet workpiece, and the conventional sensor can only heat the permanent magnet workpiece of a specific height.

[0009] The technical solution of the utility model is to provide a frame inductor for heating a permanent magnet workpiece, which is used to heat the permanent magnet workpiece. The frame inductor comprises:

[0010] The induction coil copper tube group includes a plurality of induction coil copper tubes stacked in layers, each of which is connected end to end to form a hollow area for placing a permanent magnet workpiece, the outer side of the induction coil copper tube is wrapped with insulating cloth, and the induction coil copper tube is welded with a plurality of screws;

[0011] The inner insulating plate is arranged inside the induction coil copper tube group and is fixedly connected to the induction coil copper tube group by a mounting plate connecting block, so as to isolate the radiation temperature transmitted when the permanent magnet workpiece is heated;

[0012] The upper support bar, the side support bar and the lower support bar are arranged outside the induction coil copper tube group, and are respectively located above, on the left and right sides and below the induction coil copper tube group. The upper support bar, the side support bar and the lower support bar are all provided with adjustable waist holes for support bars in the front length direction and through holes are provided on the side. Multiple screw rods pass through the multiple adjustable waist holes for support bars and are fixed by screws to adjust the height of the induction;

[0013] The insulating frame front panel is arranged outside the induction coil copper tube group, the insulating frame front panel is provided with an opening matching the hollow area, and the insulating frame front panel is fixedly connected to the induction coil copper tube group through the support bar fixing screws passing through the through holes of the upper support bar, the side support bar and the lower support bar;

[0014] The side panel of the insulating frame is arranged outside the copper tube group of the induction coil and is fixedly connected to the front panel of the insulating frame through the mounting plate connecting block;

[0015] The water joint extension copper tube is arranged outside the induction coil copper tube group and fixedly connected to the top of the induction coil copper tube group;

[0016] The copper busbar and the water access quick-twist water joint are fixedly connected to the water joint extension copper pipe, the copper busbar is fixedly connected to the connecting cable of the induction heating power supply, and the water is connected to the quick-twist water joint to cool the frame sensor.

[0017] Preferably, the frame sensor further comprises:

[0018] A protective cover mounting plate fixedly connected to the front panel of the insulating frame;

[0019] The connecting copper bar protective cover is located directly above the connecting copper bar and the water access quick-twist water joint, and is provided with a connecting cable slot for passing the connecting cable, and the connecting cable is connected to the connecting copper bar through the connecting cable slot.

[0020] Preferably, the frame inductor further comprises mounting feet for fixedly connecting the frame inductor to the assembly line.

[0021] Preferably, the frame sensor further comprises an infrared thermometer, which is located directly below the outer side of the induction coil copper tube group and is electrically connected to a power source for automatically controlling the temperature.

[0022] Preferably, the frame sensor further comprises an infrared thermometer mounting adapter plate and an infrared thermometer fixed mounting bracket, and the infrared thermometer is mounted on the infrared thermometer fixed mounting bracket via the infrared thermometer mounting adapter plate.

[0023] The technical solution of the utility model proposes a frame sensor for heating permanent magnet workpieces, which can not only adjust the height of the induction coil copper tube in the frame sensor according to the height of different permanent magnet workpieces. It can be adjusted from the maximum height to the minimum height, and permanent magnet workpieces within this height range can be heated by the same frame sensor, so as to be suitable for external heating of permanent magnet workpieces of various heights. In addition, an infrared thermometer mounting bracket is designed on the frame sensor, and an infrared temperature measuring hole is reserved on the induction coil, which can be interconnected with the induction heating power supply to realize "constant temperature closed-loop PID operation" automatic temperature control, thereby more effectively ensuring the temperature uniformity of the permanent magnet workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the frame sensor;

[0025] Figure 2 It is a three-dimensional schematic diagram of the overall internal structure of the frame sensor;

[0026] Figure 3 This is a schematic diagram of the overall adjustable height support bar of the frame sensor;

[0027] Figure 4 This is a front view of the frame sensor structure;

[0028] Figure 5 It is a schematic diagram of the side view structure section of the frame sensor;

[0029] Reference numerals:

[0030] 1-Quick-twist water joint; 2-Connecting copper bar; 3-Extending copper pipe of water joint; 4-Upper support bar; 5-Screw;

[0031] 6-inner insulating board; 7-side support bar; 8-lower support bar; 9-induction coil copper tube;

[0032] 10-protective cover mounting plate; 11-insulating frame front panel; 12-support bar fixing screws; 13-mounting feet;

[0033] 14-infrared thermometer; 15-infrared thermometer installation adapter plate; 16-infrared thermometer fixed installation bracket;

[0034] 17-connecting copper bar protective cover; 18-insulating frame side panel; 19-mounting plate connecting block;

[0035] 20-Adjustable waist hole of the support bar; 21-The coil as a whole; 22-The fixture and its products. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0037] The utility model provides a frame inductor for heating a permanent magnet workpiece, such as Figure 1-Figure 5 As shown, Figure 1 (a) is a three-dimensional front view of the overall structure of the frame sensor. Figure 1 (b) is a 3D rendering of the overall structure of the frame sensor.

[0038] Specifically, refer to Figure 3 , the upper support bar 4, the side support bar 7 and the lower support bar 8 are provided with support bar adjustable waist holes 20. In the present embodiment, the number of the upper support bars 4 is 2, the number of the side support bars 7 is 2, and the number of the lower support bar 8 is 1.

[0039] Reference Figure 2, multiple screws 5 are welded on the induction coil copper tube 9, and the height of the induction can be adjusted by fixing the screws with the screws 5. Insulating cloth is wrapped around the induction coil copper tube 9, and an inner insulating plate 6 is also provided to prevent the high temperature radiated from the heated permanent magnet workpiece from damaging the sensor. Then the induction coil copper tube 9, the inner insulating plate 6, the insulating frame front panel 11 (2 pieces) and the insulating frame side panel 18 (2 pieces) are fixed as a whole by installing the mounting plate connecting block 19. The frame sensor is fixed to the assembly line through the mounting feet 13 on the sensor, and the connecting copper bar protective cover 17 is fixed on the insulating frame front panel 11 through the protective cover mounting plate 10, and the connecting cable of the induction heating power supply is connected and fixed to the connecting copper bar 2 of the sensor through the connecting cable slot of the connecting copper bar protective cover 17. The infrared thermometer 14 is installed on the infrared thermometer fixed mounting bracket 16 through the infrared thermometer mounting adapter plate 15, and can realize "constant temperature closed loop operation" with the power supply to automatically control the temperature and meet the heating purpose.

[0040] In the practice of the utility model, after adjusting the height of the induction coil, water is connected to the quick-twist water joint 1 hose, and water is passed to cool the frame sensor before it can work.

[0041] The utility model adopts a frame sensor structure with adjustable sensor height and turn spacing. The sensor height can be adjusted according to the height of different permanent magnet workpieces, and the turn spacing between the multi-turn copper tubes of the sensor can be adjusted to ensure that the external magnetic field of the permanent magnet workpiece placed in the sensor is uniform, so that the heating temperature is more uniform. It can be adjusted from the maximum height to the minimum height, and the permanent magnet workpiece within this size range can be heated by using its frame sensor. It has the characteristics of simple height adjustment, wide application range, and uniform heating temperature.

[0042] The utility model reserves an infrared thermometer installation direct and a temperature measuring hole on the sensor, and designs an infrared thermometer installation bracket. It can realize "constant temperature closed loop operation" automatic temperature control with the induction heating power supply, and can be competent for fast non-overshoot PID temperature control of permanent magnet workpieces of different sizes.

[0043] The utility model adopts a box frame structure, that is, the outer frame of the sensor adopts an insulating plate design as a tooling box frame structure, which encapsulates all high-voltage metal conductive parts in the sensor to prevent external metal dust from entering the sensor, and also plays a safety protection role to prevent accidental electric shock. Because there is high voltage and high current on the copper tube of the sensor, insulating cloth is wrapped around the copper tube, and a frame structure is also used outside the sensor, so the protection of both sides is safer and the appearance is more beautiful.

[0044] The utility model designs a customized detachable insulating protective cover at the output copper bar position, which is installed integrally with the frame sensor to prevent personnel from accidentally touching the output copper bar on the sensor and avoid the risk of electric shock.

Claims

1. A frame inductor for heating a permanent magnet workpiece, characterized in that: Used to heat a permanent magnet workpiece, the frame inductor comprises: The induction coil copper tube group includes a plurality of induction coil copper tubes stacked in layers, each of which is connected end to end to form a hollow area for placing a permanent magnet workpiece, the outer side of the induction coil copper tube is wrapped with insulating cloth, and the induction coil copper tube is welded with a plurality of screws; The inner insulating plate is arranged inside the induction coil copper tube group and is fixedly connected to the induction coil copper tube group by a mounting plate connecting block, so as to isolate the radiation temperature transmitted when the permanent magnet workpiece is heated; The upper support bar, the side support bar and the lower support bar are arranged outside the induction coil copper tube group, and are respectively located above, on the left and right sides and below the induction coil copper tube group. The upper support bar, the side support bar and the lower support bar are all provided with adjustable waist holes for support bars in the front length direction and through holes are provided on the side. Multiple screw rods pass through the multiple adjustable waist holes for support bars and are fixed by screws to adjust the height of the induction; The insulating frame front panel is arranged outside the induction coil copper tube group, the insulating frame front panel is provided with an opening matching the hollow area, and the insulating frame front panel is fixedly connected to the induction coil copper tube group through the support bar fixing screws passing through the through holes of the upper support bar, the side support bar and the lower support bar; The side panel of the insulating frame is arranged outside the copper tube group of the induction coil and is fixedly connected to the front panel of the insulating frame through the mounting plate connecting block; The water joint extension copper tube is arranged outside the induction coil copper tube group and fixedly connected to the top of the induction coil copper tube group; The copper busbar and the water access quick-twist water joint are fixedly connected to the water joint extension copper pipe, the copper busbar is fixedly connected to the connecting cable of the induction heating power supply, and the water is connected to the quick-twist water joint to cool the frame sensor.

2. A frame inductor for heating a permanent magnet workpiece as claimed in claim 1, characterized in that: The frame sensor also includes: A protective cover mounting plate fixedly connected to the front panel of the insulating frame; The connecting copper bar protective cover is located directly above the connecting copper bar and the water access quick-twist water joint, and is provided with a connecting cable slot for passing the connecting cable, and the connecting cable is connected to the connecting copper bar through the connecting cable slot.

3. A frame inductor for heating a permanent magnet workpiece as claimed in claim 1, characterized in that: The frame inductor also includes mounting feet for fixedly connecting the frame inductor to the assembly line.

4. A frame inductor for heating a permanent magnet workpiece as claimed in claim 1, characterized in that: The frame sensor also includes an infrared thermometer, which is located just below the outer side of the induction coil copper tube group and is electrically connected to a power source for automatically controlling the temperature.

5. A frame inductor for heating a permanent magnet workpiece as claimed in claim 4, characterized in that: The frame sensor also includes an infrared thermometer installation adapter plate and an infrared thermometer fixed installation bracket, and the infrared thermometer is installed on the infrared thermometer fixed installation bracket through the infrared thermometer installation adapter plate.

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