Magnetic core feeding device and method for automatic assembly operation of integrated inductor

Abstract

The invention discloses a magnetic core feeding device and method for automatic assembly operation of integrated inductors, and relates to the technical field of inductor machining, and the technical scheme is that the magnetic core feeding device comprises a turnover device, a first conveying belt, a second conveying belt, an air gap detection device and a recycling box, the turnover device comprises a rotating disc, a rotating shaft of the rotating disc extends in the horizontal direction, and the rotating disc is further provided with at least one magnetic core carrier; the air gap detection device comprises a detection head and a driving device, the detection head comprises a detection support, a substrate and two rotating plates rotationally connected to the two sides of the substrate respectively, the substrate is provided with a film pressure sensor, the rotating plates are provided with rotating shafts, and the rotating shafts are provided with angle sensors. According to the automatic feeding device, posture adjustment and feeding of the E-shaped magnetic cores can be achieved, the air gap detection device is used for eliminating unqualified magnetic cores in the feeding process, continuous operation is achieved, and the yield of inductance products is effectively increased; the air gap detection device can evaluate whether the flatness and the air gap amount of the center pillar grinding surface are qualified or not, and is simple in structure and low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of inductor device processing, and in particular to a magnetic core feeding device and method for automatic assembly of integrated inductors. Background Art

[0002] Electromagnetic interference (EMI) filters are widely used in vehicle power supplies. The traditional EMI filter structure includes multiple differential-mode inductors and common-mode inductors, and the differential-mode inductors and common-mode inductors are independent components, which have the problem of large size. Existing common-differential-mode integrated inductors are designed to use leakage inductance as the differential-mode inductance. Generally, a silicon steel sheet wrapped with an imide film is added between the two windings to provide a magnetic circuit to increase the differential-mode inductance. However, the differential-mode inductance that can be achieved by this method is very low and cannot meet the higher differential-mode inductance requirements. If the differential-mode inductance is to be increased, the product volume must be increased. In order to solve the problems of small inductance and large volume of common-differential-mode integrated inductors, the applicant proposed the following Figure 1 The common-mode and differential-mode integrated inductors shown in the figure adopt an EI core. A large air gap is set in the middle column of the E-type core, and coils are wound on the two side columns. The air gap improves the stability of the common-mode inductor. The larger air gap can also improve the anti-saturation ability of the differential-mode inductor. The differential-mode and common-mode inductances can be controlled by adjusting the air gap amount, and the demand for higher differential-mode inductance can be met.

[0003] In the above-mentioned integrated inductor, the air gap of the magnetic core is an important parameter that affects the inductance. At present, the main method of processing the air gap is to use a grinder to grind the middle column to form an air gap. Factors such as wear and collision of the grinding wheel of the grinding equipment can easily cause fluctuations in the air gap or uneven grinding surface, affecting the consistency of the inductance. Therefore, it is necessary to detect the air gap after grinding, so as to adjust the grinding equipment in time and eliminate unqualified products to improve the product yield. The traditional method of detecting the air gap is to wind a coil on the magnetic core to measure its inductance value. It relies on manual operation and has cumbersome steps and low efficiency. It is difficult to apply it in the automatic and continuous production of inductor automatic assembly system; automatic detection methods such as laser scanning and image processing are highly efficient and can be embedded in the magnetic core feeding operation to form a continuous assembly line operation, but the cost is relatively high; in addition, the magnetic core needs to be adjusted to the posture to be assembled during the feeding process of the inductor automatic assembly operation to facilitate assembly with other components such as coils. Summary of the invention

[0004] In order to solve the problem of how to realize low-cost continuous detection of the air gap amount of E-type magnetic core after grinding and posture adjustment during the magnetic core feeding process, the present invention provides a magnetic core feeding device and method for automatic assembly of integrated inductors.

[0005] The present invention provides the following technical solution: a magnetic core feeding device for automatic assembly of integrated inductors, comprising: A turning device, comprising a turntable and a motor for driving the turntable to rotate, wherein the rotation axis of the turntable extends in a horizontal direction, and the turntable is also provided with at least one magnetic core carrier; a first conveyor belt and a second conveyor belt, wherein the first conveyor belt and the second conveyor belt are respectively arranged on both sides of the turntable, and the second conveyor belt is provided with a pushing device for pushing the magnetic core from the magnetic core carrier to the second conveyor belt; An air gap detection device, the air gap detection device is arranged on one side of the turntable and corresponds to one of the magnetic core carriers, the air gap detection device comprises a detection head and a driving device for driving the detection head to move linearly, the detection head comprises a detection bracket, a substrate connected to the detection bracket, and two rotating plates respectively connected to both sides of the substrate, the substrate is provided with a thin film pressure sensor on the side facing the turntable, the rotating plate is provided with a rotating shaft, and the rotating shaft is provided with an angle sensor; A recycling box is arranged at the bottom of the turntable.

[0006] Preferably, a baffle corresponding to the first conveyor belt is further provided on the side of the turntable facing away from the first conveyor belt; the turntable is provided with four magnetic core carriers symmetrically about the center of the turntable axis; the magnetic core carrier is a U-shaped trough body matched with the E-shaped magnetic core, the center axis of the magnetic core carrier extends along the radial direction of the turntable, the first opening and the second opening of the magnetic core carrier are respectively facing the first conveyor belt and the second conveyor belt, and the third opening of the magnetic core carrier faces away from the axis of the turntable; the magnetic core carrier is also provided with a groove corresponding to the rotating axis.

[0007] Preferably, the second conveyor belt is arranged near the top of the turntable and corresponds to the second opening of the magnetic core carrier at the top of the turntable; the recovery box corresponds to the third opening of the magnetic core carrier at the bottom of the turntable; the height of the first conveyor belt and the air gap detection device is between the second conveyor belt and the recovery box, and the first conveyor belt and the air gap detection device correspond to the first opening and the third opening of a magnetic core carrier respectively.

[0008] Preferably, the U-shaped trough body is further provided with a vacuum suction cup, the rotating shaft of the turntable is provided with an air circuit rotating joint, and the air pipe of the vacuum suction cup is connected to the air circuit rotating joint.

[0009] Preferably, avoidance grooves are provided at the top and bottom of the substrate, the angle sensor is arranged on a fixed plate, and the fixed plate is connected to the substrate; the moving trajectory of the detection head extends in a horizontal direction and is perpendicular to the substrate, the detection bracket is provided with a plurality of guide columns extending in a horizontal direction, the substrate is provided with a guide sleeve slidably connected to the guide column, and a compression spring is also provided between the substrate and the detection bracket.

[0010] Preferably, the rotating shaft is also sleeved with a return torsion spring, and two ends of the return torsion spring extend to the base plate and the rotating plate respectively.

[0011] Preferably, the width of the thin film pressure sensor is greater than the center column of the E-shaped magnetic core.

[0012] Preferably, a limit plate is provided on the top of each of the first conveyor belt and the second conveyor belt, and the limit plate is provided with a guide groove extending along the length direction, and the guide groove corresponds to one of the magnetic core carriers.

[0013] Preferably, the pushing device comprises a pushing bracket arranged on the limiting plate, and a cylinder arranged on the pushing bracket, and the piston rod of the cylinder is provided with a pushing plate extending toward the magnetic core carrier.

[0014] A method for feeding magnetic cores in automatic assembly of integrated inductors, comprising the following steps: Step 1, conveying the E-shaped magnetic core to the magnetic core carrier of the flipping device by using a first conveyor belt, with the air gap of the middle column of the E-shaped magnetic core facing the air gap detection device; Step 2, the air gap detection device detects the pressure distribution data of the grinding surface of the center column of the E-type magnetic core and the rotation angle of the two rotating plates, and evaluates whether the flatness of the grinding surface of the center column and the air gap amount are qualified; Step 3, if both the flatness and the air gap are qualified, the flipping device rotates the turntable to flip the E-type magnetic core to the air gap upward, and sends it to the second conveyor belt; if either the flatness or the air gap is unqualified, the flipping device sends the E-type magnetic core to the recycling box.

[0015] The beneficial effects of the present invention are as follows: the posture adjustment and loading of the E-type magnetic core are realized by using the first conveyor belt, the turning device, the pushing device and the second conveyor belt, and the unqualified magnetic cores are eliminated by using the air gap detection device during the loading process, so as to realize continuous operation and effectively improve the yield rate of the inductor products; the air gap detection device uses a thin film pressure sensor to detect the pressure distribution data of the grinding surface of the middle column and the relative position of the detection head and the middle column, and calculates the air gap amount between the middle column and the two side columns in combination with the rotation angle of the rotating plate detected by the angle sensor, so as to evaluate whether the flatness of the grinding surface of the middle column and the air gap amount are qualified, and the structure is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a common-mode and differential-mode integrated inductor.

[0017] Figure 2 A side view of an embodiment of a magnetic core feeding device.

[0018] Figure 3 A top view of an embodiment of a magnetic core feeding device.

[0019] Figure 4It is a three-dimensional schematic diagram of an embodiment of a magnetic core feeding device.

[0020] Figure 5 A schematic diagram of an embodiment of a turntable.

[0021] Figure 6 for Figure 4 Enlarged view of part A.

[0022] Figure 7 A three-dimensional schematic diagram of an embodiment of an air gap detection device.

[0023] Figure 8 A side view of an embodiment of an air gap detection device.

[0024] Fig. 9 The figure is a schematic diagram of the operation of an air gap detection device according to an embodiment of the present invention.

[0025] 1. The guide groove of the drawing is as follows: 10. The first conveyor belt; 11. The limit plate; 12. The guide groove; 20. The turning device; 21. The turntable; 22. The magnetic core carrier; 22a. The magnetic core carrier; 22b. The magnetic core carrier; 22c. The magnetic core carrier; 23. The baffle plate; 24. The groove; 25. The vacuum suction cup; 26. The air path rotary joint; 30. The air gap detection device; 31. The driving device; 32. The detection bracket; 321. The guide column; 33. The substrate; 34. The rotating plate; 35. The thin film pressure sensor; 36. The rotating shaft; 37. The angle sensor; 38. The avoidance groove; 39. The reset torsion spring; 40. The pushing device; 41. The pushing bracket; 42. The cylinder; 43. The push plate; 50. The second conveyor belt; 60. The recovery box; 61. The guide slope; 70. The E-type magnetic core. DETAILED DESCRIPTION

[0026] The following is a more detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and the accompanying drawings so that a person skilled in the art can implement the embodiments after reading the description. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Example 1

[0028] The present invention provides a magnetic core feeding device for automatic assembly of integrated inductors, comprising a first conveyor belt 10, a turning device 20, an air gap detection device 30, a pushing device 40, a second conveyor belt 50 and a recovery box 60.

[0029] Please refer to Figure 2-4The first conveyor belt 10 can be a belt conveyor, one end of which can be connected to the vibration plate, and the other end extends to the flip device 20. After the multiple E-type magnetic cores 70 are arranged in order on the vibration plate, they are transported to the flip device 20 by the first conveyor belt 10. A limit plate 11 is provided on the top of the first conveyor belt 10, and the limit plate 11 is provided with a guide groove 12 extending along the length direction. The guide groove 12 cooperates with the transversely placed E-type magnetic cores 70, so as to guide the multiple E-type magnetic cores to the magnetic core carrier 22 in sequence during the transportation process.

[0030] The second conveyor belt 50 has a similar structure to the first conveyor belt 10 and is also provided with a limit plate and a guide groove, but its guide groove cooperates with the vertically placed E-type magnetic core. The E-type magnetic core 70 that has passed the inspection of the air gap detection device 30 is flipped to a vertical position by the flipping device 20 and is transported to the next process by the second conveyor belt 50.

[0031] The recovery box 60 is used to recover the unqualified E-type magnetic cores detected by the air gap detection device 30, and is arranged at the bottom of the flip device 20. In order to prevent the magnetic cores from being broken or chipped due to falling, a guide slope 61 made of a buffer material is arranged in the recovery box 60. When the unqualified E-type magnetic cores fall into the recovery box 60, they first contact the guide slope 61, reduce their kinetic energy, and then slide to the lower part of the recovery box 60.

[0032] The E-shaped magnetic cores are placed horizontally after being arranged in order on the vibration plate, with their openings facing the side. They need to be placed vertically using the flip device 20, with their openings facing upwards, so that the coils can be easily assembled to the two side columns. Figure 2-5 The flipping device 20 includes a turntable 21 and a motor for driving the turntable 21 to rotate. The motor can be a servo motor or a stepper motor. The rotation axis of the turntable 21 extends in the horizontal direction, and the turntable 21 is also provided with four magnetic core carriers 22 symmetrical about the center of the rotation axis of the turntable 21. The motor drives the turntable 21 to rotate 90 degrees on the vertical plane each time, so that the four magnetic core carriers 22 work in turn and flip the opening direction of the E-type magnetic core in the magnetic core carrier 22.

[0033] Specifically, the magnetic core carrier 22 is a U-shaped trough body that cooperates with the E-shaped magnetic core. The central axis of the U-shaped trough body extends along the radial direction of the turntable 21. The U-shaped trough body is open on three sides, and its first opening and second opening are respectively facing the first conveyor belt 10 and the second conveyor belt 50, and the third opening of the U-shaped trough body is away from the rotating axis of the turntable 21 and faces outward.

[0034] The first conveyor belt 10 and the second conveyor belt 50 are respectively arranged on both sides of the turntable 21. Figure 2-4As shown, the second conveyor belt 50 is arranged near the top of the turntable 21, and its guide groove corresponds to the second opening of the core carrier 22b at the top of the turntable 21. The E-type magnetic core in the core carrier can be pushed to the second conveyor belt 50 through the second opening by the pushing device 40; the recycling box 60 corresponds to the third opening of the core carrier 22c at the bottom of the turntable 21, and the turntable 21 rotates downward, and the E-type magnetic core in the core carrier 22 falls into the recycling box 60; the height of the first conveyor belt 10 is between the second conveyor belt 50 and the recycling box 60, and its guide groove 12 corresponds to the first opening of the core carrier 22a on the left side of the turntable 21, so that the first conveyor belt 10 can deliver the horizontally placed E-type magnetic core into the core carrier. The numbering of the core carriers 22a~c is based on the position of the core carriers, not a specific core carrier. For example, when the turntable 21 rotates 90° clockwise, the core carrier 22a on the left side of the turntable rotates to the top of the turntable, and its number is converted to 22b.

[0035] The turntable 21 is also provided with a baffle 23 corresponding to the first conveyor belt 10 on the side away from the first conveyor belt 10, which is used to close the second opening of the magnetic core carrier 22a and limit the E-type magnetic core 70. The length of the magnetic core carrier 22 can be smaller than the length of the E-type magnetic core. After the E-type magnetic core enters the magnetic core carrier 22a and is blocked by the baffle 23, a part of the magnetic core still protrudes from the magnetic core carrier, so as to avoid affecting other E-type magnetic cores on the first conveyor belt 10 when the magnetic core carrier rotates.

[0036] The second conveyor belt 50 is provided with a pushing device 40 for pushing the magnetic core from the magnetic core carrier 22 to the second conveyor belt 50. Figure 6 The pushing device 40 includes a pushing bracket 41 disposed on the limit plate 11, a cylinder 42 disposed on the pushing bracket 41, and a piston rod of the cylinder 42 is provided with a push plate 43 extending toward the magnetic core carrier 22; the cylinder 42 drives the push plate 43 to retract and push the E-type magnetic core toward the second conveyor belt 50, and then the push plate 43 is reset. In other embodiments, the pushing device 40 may also use a synchronous belt transmission device, a linear module, an electric push rod and other mechanisms to drive the push plate 43 to reciprocate linearly.

[0037] Furthermore, the U-shaped trough body is also provided with a vacuum suction cup 25, the rotating shaft of the turntable 21 is provided with an air path rotary joint 26, the air pipe of the vacuum suction cup 25 is connected to the air path rotary joint 26, and the air path rotary joint 26 is connected to the pneumatic control system. When the E-type magnetic core enters the magnetic core carrier 22, the air gap detection device 30 will press the E-type magnetic core and the magnetic core carrier 22 during the detection process to reduce the gap between the two, and the vacuum suction cup 25 will start to suck the E-type magnetic core to enhance stability and prevent it from shifting during air gap detection and rotation; when the turntable 21 rotates 90 degrees, the vacuum suction cup 25 stops working, so that the E-type magnetic core can be moved to the second conveyor belt or recycling box. A support plate is also provided between the first and second conveyor belts and the magnetic core carrier to prevent the E-type magnetic core from getting stuck in the gap between the conveyor belt and the magnetic core carrier to affect continuous operation.

[0038] The present invention also includes an air gap detection device 30 for detecting whether the air gap is qualified. Figures 2~4 The air gap detection device 30 is arranged on one side of the turntable 21, and its height is between the second conveyor belt 50 and the recovery box 60 and corresponds to the third opening of the magnetic core carrier 22a on the left side of the turntable.

[0039] Please refer to Figure 7-8 , the air gap detection device 30 includes a detection head and a driving device 31 for driving the detection head to move linearly. The detection head includes a detection bracket 32, a base plate 33 connected to the detection bracket 32, and two rotating plates 34 respectively connected to the two sides of the base plate 33. Among them, the top and bottom of the base plate 33 are provided with avoidance grooves 38 to avoid interference between the detection head and the magnetic core carrier 22 when working; the detection bracket 32 ​​is provided with a plurality of guide columns 321 extending in the horizontal direction, and the base plate 33 is provided with a guide sleeve slidably connected to the guide column 321. A compression spring is also provided between the base plate 33 and the detection bracket 32 ​​to support the base plate 33 and play a buffering role when the detection head contacts the E-type magnetic core, thereby extending the working life.

[0040] The substrate 33 is also provided with a thin film pressure sensor 35 on the side facing the turntable 21. When it contacts the polished surface of the middle column of the E-type magnetic core, the flatness of the polished surface of the middle column is evaluated by the pressure distribution acting on the thin film pressure sensor 35. Preferably, the width L of the thin film pressure sensor 35 is larger than the middle column of the E-type magnetic core, which is convenient for identifying the relative position of the substrate and the polished surface of the middle column and reducing the error in calculating the air gap. The rotating plate 34 is provided with a rotating shaft 36, which is rotatably connected to the substrate 33. The rotating shaft 36 is also provided with an angle sensor 37, which is provided on a fixed plate, and the fixed plate is connected to the substrate 33. The two angle sensors 37 respectively detect the rotation angles of the two rotating plates 34. The magnetic core carrier 22 is also provided with a groove 24 corresponding to the rotating shaft 36 to avoid interference.

[0041] The driving device 31 can adopt a cylinder, a linear module or a synchronous belt transmission structure, and the moving track of the detection head extends in the horizontal direction and is perpendicular to the substrate 33, so that the thin film pressure sensor 35 on the substrate 33 can fit tightly with the polished surface of the qualified E-type magnetic core center column.

[0042] Furthermore, the rotating shaft 36 is also sleeved with a reset torsion spring 39 , and two ends of the reset torsion spring 39 extend to the base plate 33 and the rotating plate 34 respectively. When no detection is performed, the reset torsion spring 39 resets the rotating plate 34 .

[0043] The working principle of the air gap detection device 30 can be found in Fig. 9 . The first conveyor belt 10 delivers the laterally placed E-type magnetic core into the magnetic core carrier 22a, with the opening of the E-type magnetic core facing the detection head. Generally, the installation position of the air gap detection device 30 should be ensured, and the central axis of its substrate 33 should be as collinear as possible with the central axis of the E-type magnetic core in the magnetic core carrier 22a. The driving device 31 drives the detection head to move a certain stroke toward the E-type magnetic core. This stroke ensures that the detection head applies pressure to the E-type magnetic core, and the thin film pressure sensor 35 contacts the grinding surface of the middle column, and under the restriction of the side column, the rotating plate 34 rotates. The thin film pressure sensor 35 transmits the pressure distribution data to the control unit. If the grinding surface of the middle column is skewed, the pressure distribution data shows that the pressure range should be smaller than the cross-sectional area of ​​the middle column. Therefore, it can be judged that the flatness of the grinding surface of the middle column is unqualified, which affects the size of the air gap. Otherwise, the flatness is judged to be qualified. After the flatness is qualified, the control unit can calculate the air gap L1 and L2 between the center column and the two side columns respectively according to the rotation angle detected by the two angle sensors 37, combined with the basic dimensions of the detection head and the E-type magnetic core. If the errors between the two and the standard values ​​and the difference between L1 and L2 are within the preset range, it means that the air gap is qualified; if the deviation is large, it will inevitably affect the inductance consistency. The air gap is the length difference between the center column and the side column. After the detection is completed, the detection head is reset. Preferably, due to the large width of the thin film pressure sensor 35, the relative position of the substrate and the grinding surface of the center column can also be determined by the pressure distribution data. There is inevitably a slight deviation in the position of the first conveyor belt 10 each time the E-type magnetic core is fed into the magnetic core carrier 22a. In the calculation of the air gap, the error can be effectively reduced by combining the relative position.

[0044] The first conveyor belt 10, the turning device 20, the air gap detection device 30, the pushing device 40, and the second conveyor belt 50 are all electrically connected to the control unit, and the control unit can refer to the relevant technology. The first conveyor belt 10 conveys the E-type magnetic core to the magnetic core carrier 22. A position sensor can be set on the baffle 23 to determine whether the E-type magnetic core is in place, and then the air gap detection device 30 is started to detect the flatness of the center column grinding surface and the air gap amount. If both are qualified, the turntable 21 rotates 90° clockwise to send the E-type magnetic core to the top, and the opening direction of the E-type magnetic core faces upward, changing to a vertically placed posture to be assembled, and then the pushing device 40 is used to move it to the second conveyor belt for transportation to the assembly process; otherwise, the turntable 21 rotates 90° counterclockwise, and the unqualified E-type magnetic core falls into the recycling box 60 to wait for processing.

[0045] Example 2

[0046] A method for feeding magnetic cores for automatic assembly of integrated inductors according to the present invention is based on the feeding device described in Example 1 and comprises the following steps: Step 1: After being arranged in order on the vibration plate, multiple E-type magnetic cores 70 enter the first conveyor belt 10, and the E-type magnetic cores 70 are placed horizontally. During the conveying process, multiple E-type magnetic cores 70 are squeezed in sequence, and the E-type magnetic cores 70 at the end of the first conveyor belt 10 are conveyed to the magnetic core carrier 22 of the flip device 20. The first conveyor belt 10 stops working, and the air gap in the middle column of the E-type magnetic core 70 faces the air gap detection device 30.

[0047] Step 2, start the air gap detection device to detect the pressure distribution data of the polished surface of the middle column of the E-type magnetic core and the rotation angle of the two rotating plates. The pressure distribution data can be used to first evaluate the flatness of the polished surface of the middle column. If the flatness is qualified, the rotation angle detected by the two angle sensors 37 is further used, combined with the relative position of the detection head and the polished surface of the middle column and the basic dimensions of the detection head and the E-type magnetic core, to calculate the air gap amounts L1 and L2 between the middle column and the two side columns respectively, and evaluate whether the air gap amounts L1 and L2 are qualified; if the flatness is unqualified, go directly to step 3.

[0048] Step 3, if both the flatness and the air gap are qualified, the flipping device 20 rotates the turntable 21 to rotate the E-type magnetic core 70 90° clockwise until the air gap faces upward, and uses the pushing device 40 to send it to the second conveyor belt 50; if one of the flatness and the air gap is unqualified, the flipping device 20 rotates 90° counterclockwise to send the E-type magnetic core 70 to the recycling box 60.

[0049] The above are one or more embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A magnetic core feeding device for automatic assembly of integrated inductors, characterized in that: include: A turning device (20), comprising a turntable (21) and a motor for driving the turntable (21) to rotate, wherein the rotation axis of the turntable (21) extends in a horizontal direction, and the turntable (21) is further provided with at least one magnetic core carrier (22); A first conveyor belt (10) and a second conveyor belt (50), wherein the first conveyor belt (10) and the second conveyor belt (50) are respectively arranged on both sides of the turntable (21), and the second conveyor belt (50) is provided with a pushing device (40) for pushing the E-shaped magnetic core from the magnetic core carrier (22) to the second conveyor belt (50); An air gap detection device (30), the air gap detection device (30) being arranged on one side of the turntable (21) and corresponding to one of the magnetic core carriers (22), the air gap detection device (30) comprising a detection head and a driving device (31) for driving the detection head to move linearly, the detection head comprising a detection bracket (32), a substrate (33) connected to the detection bracket (32), and two rotating plates (34) respectively rotatably connected to two sides of the substrate (33), a thin film pressure sensor (35) being arranged on the side of the substrate (33) facing the turntable (21), the rotating plate (34) being provided with a rotating shaft (36), and the rotating shaft (36) being provided with an angle sensor (37); A recovery box (60), wherein the recovery box (60) is arranged at the bottom of the rotating disk (21).

2. The integrated inductor automatic assembly operation magnetic core feeding device according to claim 1 is characterized in that: A baffle (23) corresponding to the first conveyor belt (10) is also provided on the side of the turntable (21) facing away from the first conveyor belt (10); the turntable (21) is provided with four magnetic core carriers (22) symmetrically about the center of the rotation axis of the turntable (21); the magnetic core carrier (22) is a U-shaped groove body matched with the E-shaped magnetic core, the center axis of the magnetic core carrier extends along the radial direction of the turntable (21), the first opening and the second opening of the magnetic core carrier (22) are respectively oriented towards the first conveyor belt (10) and the second conveyor belt (50), and the third opening of the magnetic core carrier faces away from the rotation axis of the turntable (21); the magnetic core carrier is also provided with a groove (24) corresponding to the rotating shaft (36).

3. The integrated inductor automatic assembly operation magnetic core feeding device according to claim 2 is characterized in that: The second conveyor belt (50) is arranged near the top of the turntable (21) and corresponds to the second opening of the magnetic core carrier (22) at the top of the turntable (21); the recovery box (60) corresponds to the third opening of the magnetic core carrier (22) at the bottom of the turntable (21); the height of the first conveyor belt (10) and the air gap detection device (30) is between the second conveyor belt (50) and the recovery box (60), and the first conveyor belt (10) and the air gap detection device (30) correspond to the first opening and the third opening of a magnetic core carrier (22), respectively.

4. The integrated inductor automatic assembly operation magnetic core feeding device according to claim 2, characterized in that: The U-shaped trough body is further provided with a vacuum suction cup (25), the rotating shaft of the rotating disk (21) is provided with an air circuit rotating joint (26), and the air pipe of the vacuum suction cup (25) is connected to the air circuit rotating joint (26).

5. The integrated inductor automatic assembly operation magnetic core feeding device according to claim 2, characterized in that: The top and bottom of the base plate (33) are both provided with avoidance grooves (38); the angle sensor (37) is arranged on a fixed plate, and the fixed plate is connected to the base plate (33); the moving track of the detection head extends in a horizontal direction and is perpendicular to the base plate (33); the detection bracket (32) is provided with a plurality of guide posts (321) extending in a horizontal direction; the base plate (33) is provided with a guide sleeve slidably connected to the guide posts (321); and a compression spring is further provided between the base plate (33) and the detection bracket (32).

6. The integrated inductor automatic assembly operation magnetic core feeding device according to claim 5, characterized in that: The rotating shaft (36) is also sleeved with a return torsion spring (39), and two ends of the return torsion spring (39) extend to the base plate (33) and the rotating plate (34) respectively.

7. The integrated inductor automatic assembly operation magnetic core feeding device according to claim 1, characterized in that: The width of the thin film pressure sensor is greater than the center column of the E-shaped magnetic core.

8. The integrated inductor automatic assembly operation magnetic core feeding device according to claim 1, characterized in that: A limiting plate (11) is provided on the top of each of the first conveyor belt (10) and the second conveyor belt (50); the limiting plate (11) is provided with a guide groove (12) extending along the length direction, and the guide groove (12) corresponds to one of the magnetic core carriers (22).

9. The integrated inductor automatic assembly operation magnetic core feeding device according to claim 8, characterized in that: The pushing device (40) comprises a pushing bracket (41) arranged on the limiting plate (11), and a cylinder (42) arranged on the pushing bracket (41); the piston rod of the cylinder (42) is provided with a pushing plate (43) extending towards the magnetic core carrier (22).

10. A method for feeding magnetic cores in automatic assembly of integrated inductors, characterized in that: The following steps are involved: Step 1, conveying the E-shaped magnetic core to the magnetic core carrier of the flipping device by using a first conveyor belt, with the air gap of the middle column of the E-shaped magnetic core facing the air gap detection device; Step 2, the air gap detection device detects the pressure distribution data of the grinding surface of the center column of the E-type magnetic core and the rotation angle of the two rotating plates, and evaluates whether the flatness of the grinding surface of the center column and the air gap amount are qualified; Step 3, if both the flatness and the air gap are qualified, the flipping device rotates the turntable to flip the E-type magnetic core to the air gap upward, and sends it to the second conveyor belt; if either the flatness or the air gap is unqualified, the flipping device sends the E-type magnetic core to the recycling box.

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