A device and method for detecting layer misalignment in multilayer coil boards.

Abstract

This invention discloses a multilayer coil board layer misalignment detection device in the field of electrical component technology, including a feeding and positioning mechanism, a layer sequence recognition module, a visual alignment detection module, and an X-ray layer misalignment detection module. The feeding and positioning mechanism consists of a feeding conveyor belt and a rear conveyor belt. The visual alignment detection module is located between the feeding conveyor belt and the rear conveyor belt. The layer sequence recognition module is mounted above the upper conveyor belt. The X-ray layer misalignment detection module is located on the side of the rear conveyor belt away from the visual alignment detection module. The visual alignment detection module includes: a middle operating plate, on which a movable working panel is slidably mounted, and a coil board rapid positioning and drying device is mounted; an upper alignment plate and a lower alignment plate, which are respectively mounted on the upper and lower sides of the middle operating plate. This invention ensures the stacking order by controlling the coil board feeding sequence and the target image, and ensures the bonding accuracy by using the target image.

Description

Technical Field

[0001] This invention relates to the field of electrical component technology, specifically to a multilayer coil board layer offset detection device and detection method, and the method thereof. Background Technology

[0002] Multilayer coil boards, as the core carriers of inductors, electromagnetic induction devices, and precision electronic control components, are widely used in new energy, industrial control electronics, precision sensing, and other fields. The alignment accuracy between layers and the correctness of the stacking sequence directly determine the inductance parameters, conductivity, and product lifespan of the coils, and are key indicators to ensure the stable function of the devices.

[0003] In the production process of multilayer coil boards, lamination and layer misalignment detection are core processes. Traditional processing methods rely heavily on manual stacking, with subsequent layer misalignment checks performed separately by testing equipment. Manual operation carries a certain error rate; therefore, existing production lines typically incorporate error-proofing devices to ensure the quality of finished coil boards and reduce the possibility of misalignment / mis-lamination during production. However, existing error-proofing devices are highly dependent on manual stacking, making it difficult to guarantee alignment accuracy and resulting in ineffective error-proofing. Furthermore, in traditional manual stacking, operators rely heavily on experience and visual judgment of alignment benchmarks, lacking standardized and visual alignment guidance structures. This makes them highly susceptible to interlayer misalignment and alignment deviations due to fatigue, negligence, and operational errors, with the amount of misalignment difficult to control within micron-level tolerances. Summary of the Invention

[0004] The technical problem of the present invention is to provide a layer offset detection device and detection method for multilayer coil boards, which ensures the stacking order by controlling the coil board loading sequence and the target image, and ensures the bonding accuracy by using the target image.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a layer misalignment detection device for a multilayer coil board, comprising a feeding and positioning mechanism, a layer sequence recognition module, a visual alignment detection module, and an X-ray layer misalignment detection module. The feeding and positioning mechanism consists of a feeding conveyor belt and a rear conveyor belt. The visual alignment detection module is located between the feeding conveyor belt and the rear conveyor belt. The layer sequence recognition module is mounted above the upper conveyor belt. The X-ray layer misalignment detection module is located on the side of the rear conveyor belt away from the visual alignment detection module. The visual alignment detection module includes: An intermediate control panel, on which a movable working panel is slidably mounted, and a coil plate rapid positioning drying device is mounted on the movable working panel; An upper alignment plate and a lower alignment plate are respectively disposed on the upper and lower sides of the intermediate operation plate. An alignment auxiliary turntable is provided on both the upper and lower alignment plates. The alignment auxiliary turntable can project the target image onto the intermediate operation plate according to the pasting sequence.

[0006] As a further embodiment of the present invention, the alignment auxiliary turntable includes a rotating base and a target image plate. Multiple sets of target image plates are distributed equidistantly in a circle. A rotating motor is fixedly installed inside the rotating base. The output end of the rotating motor is fixedly connected to the center position of the disk formed by the multiple sets of target image plates. The rotating motor can drive the multiple sets of target image plates to rotate around the center of the upper alignment plate and the lower alignment plate.

[0007] As a further embodiment of the present invention, the movable working panel includes a plug-in slot and a handle slot. The handle slot is longitudinally provided through the end of the movable working panel, and the plug-in slot is transversely provided inside the movable working panel. The plug-in slot can be inserted into the intermediate operating plate. At this time, the movable working panel is located on the upper and lower sides of the intermediate operating plate. The intermediate operating plate, the lower alignment plate, and the upper alignment plate are all transparent glass panels.

[0008] As a further embodiment of the present invention, the coil plate rapid positioning and drying device includes a drying ring and a snap-fit ​​groove. The snap-fit ​​groove is formed on the surface of the movable working panel, and the coil plate can be positioned and snapped into the snap-fit ​​groove. The drying ring is arranged around the snap-fit ​​groove, and the inner wall of the drying ring is provided with drying holes.

[0009] As a further embodiment of the present invention, a movable limiting member is provided at the front end of the feeding conveyor belt. The movable limiting member includes a fixed side plate, a movable side plate, and a front baffle. The fixed side plate is fixedly disposed on the upper surface of the feeding conveyor belt and is parallel to the moving direction of the feeding conveyor belt. The movable side plate is parallel to the fixed side plate. The front baffle is perpendicular to the front end of the fixed side plate and the movable side plate. Both the front baffle and the movable side plate can be driven by a cylinder to perform linear motion. A fixed limiting member is provided at the end of the feeding conveyor belt away from the movable limiting member.

[0010] As a further embodiment of the present invention, a control unit is provided on one side of the feeding conveyor belt and the rear conveyor belt. The control unit is electrically connected to the feeding positioning mechanism, the layer sequence recognition module, the visual alignment detection module and the X-ray layer deviation detection module. An alarm execution mechanism is provided on one side of each of the layer sequence recognition module, the visual alignment detection module and the X-ray layer deviation detection module. The alarm execution mechanism is electrically connected to the control unit.

[0011] As a further embodiment of the present invention, the layer sequence recognition module includes a barcode scanner and an image acquisition unit. The barcode scanner and the image acquisition unit are capable of reading the unique identification code and the special layer sequence pattern on the coil board, and are capable of transmitting the recognition information to the control unit.

[0012] As a further embodiment of the present invention, the X-ray layer offset detection module includes a microfocus X-ray source and a flat panel detector. The microfocus X-ray source and the flat panel detector can perform non-destructive testing on the laminated multilayer coil board and can calculate the layer offset values ​​in the X and Y directions.

[0013] A method for detecting layer misalignment in a multilayer coil board, the specific steps of which are as follows: Step 1: The coil board is conveyed through the feeding conveyor belt of the feeding and positioning mechanism into the layer sequence identification module, where the stacking order is verified by the layer sequence identification module; Step 2: After inspection, the coil board is moved to the vision alignment inspection module according to the stacking sequence by the feeding conveyor belt; Step 3: The visual alignment detection module provides target images to the operator for pasting the coil boards according to the pasting order; Step 4: After pasting, the multilayer coil board is moved to the X-ray layer offset detection module by the rear conveyor belt to perform non-destructive testing on the pressed multilayer coil board; Step 5: After the entire detection process is completed without any alarms or warnings, the multi-layer coil board is collected by the material collection and positioning mechanism.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention reduces the need for manpower in the equipment. The only part requiring manual operation is the pasting part of the viewing angle alignment detection module. The pasting sequence and position before pasting are determined by the layer sequence recognition module and the visual alignment detection module, further avoiding the possibility of misalignment due to manual operation. In addition, after each layer is pasted, it is quickly dried by the coil board rapid positioning and drying equipment. The adhesive cures quickly after pasting, avoiding the situation of coil board misalignment due to untimely curing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the movable limiting component in this invention; Figure 4 This is a schematic diagram of the visual alignment detection module in this invention; Figure 5 This is a schematic diagram of the structure of the active working panel in this invention; Figure 6 This is a flowchart of the process of the present invention.

[0017] The attached diagram lists the components represented by each number as follows: 1. Feeding conveyor belt; 2. Rear conveyor belt; 3. Layer sequence recognition module; 4. Visual alignment detection module; 401. Middle operation panel; 402. Lower alignment plate; 403. Upper alignment plate; 404. Rotating seat; 405. Target image plate; 5. X-ray layer deviation detection module; 6. Fixed limiting component; 7. Movable limiting component; 701. Fixed side plate; 702. Movable side plate; 703. Front baffle; 8. Movable working panel; 801. Drying ring; 802. Snap-fit ​​groove; 803. Handle groove; 804. Insertion groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-6 This invention provides a technical solution: a layer misalignment detection device for a multilayer coil board, comprising a feeding and positioning mechanism, a layer sequence recognition module 3, a visual alignment detection module 4, and an X-ray layer misalignment detection module 5. The feeding and positioning mechanism consists of a feeding conveyor belt 1 and a rear conveyor belt 2. The visual alignment detection module 4 is located between the feeding conveyor belt 1 and the rear conveyor belt 2. The layer sequence recognition module 3 is mounted above the upper conveyor belt 1. The X-ray layer misalignment detection module 5 is located on the side of the rear conveyor belt 2 away from the visual alignment detection module 4. The visual alignment detection module 4 includes: The intermediate operation panel 401 has a movable work panel 8 that is slidably mounted on it, and the movable work panel 8 is equipped with a coil plate rapid positioning drying device. The upper alignment plate 403 and the lower alignment plate 402 are respectively set on the upper and lower sides of the middle operation plate 401. Both the upper alignment plate 403 and the lower alignment plate 402 are equipped with alignment auxiliary turntables, which can project the target image onto the middle operation plate 401 according to the pasting order.

[0020] During operation, the coil boards in this invention are input into the layer sequence recognition module 3 via a feeding and positioning mechanism. The layer sequence recognition module 3 reads the unique identifier or layer sequence feature image on the coil board to ensure that the coil boards are input in the order from bottom to top, thereby verifying the stacking order and preventing mis-layering, skipping layers, and duplicate layers. After passing through the layer sequence recognition module 3, the coils enter the visual alignment detection module 4, which ensures that they are pasted in the order from bottom to top. The target image is displayed on the intermediate operation board 401, allowing the operator to paste the coil boards according to the target image for each layer. During the pasting process, the visual alignment detection module can identify the target center coordinates based on the target center coordinates and calculate the inter-layer offset. It judges in real time whether the pasted coil boards exceed the deviation during the stacking process, ensuring the accuracy and precision of each layer of coil board pasting, further ensuring the error-proof effect, and providing real-time feedback on the detection effect to prevent defective products from entering the next processing step. After the coil boards are completely pasted, they enter the X-ray layer deviation detection module 5 via the rear conveyor belt 2 for non-destructive testing of the multi-layer coil boards, and finally, the finished product quality is inspected. This invention reduces the need for manpower in the equipment. The only part requiring manual operation is the pasting part of the visual alignment detection module. The pasting sequence and position before pasting are determined by the layer sequence recognition module 3 and the visual alignment detection module 4, further avoiding the possibility of misalignment due to manual operation. In addition, after each layer is pasted, it is quickly dried by the coil board rapid positioning and drying equipment, and the glue cures quickly after pasting, avoiding the situation of coil board misalignment due to untimely curing.

[0021] As a further embodiment of the present invention, the alignment auxiliary turntable includes a rotating base 404 and a target image plate 405. Multiple sets of target image plates 405 are distributed equidistantly in a circle. A rotating motor is fixedly installed inside the rotating base 404. The output end of the rotating motor is fixedly connected to the center position of the disk formed by the multiple sets of target image plates 405. The rotating motor can drive the multiple sets of target image plates 405 to rotate around the center of the upper alignment plate 403 and the lower alignment plate 402.

[0022] During operation, the manually operated pasting part of this invention uses a target image as a pasting aid to improve the pasting accuracy of each coil board. The target image is rotated sequentially to the operating position (i.e., the position of the snap-fit ​​slot 802) by a rotating motor, thereby further ensuring the accuracy of the pasting layer sequence.

[0023] As a further embodiment of the present invention, the movable work panel 8 includes a plug groove 804 and a handle groove 803. The handle groove 803 is longitudinally provided through the end of the movable work panel 8, and the plug groove 804 is transversely provided inside the movable work panel 8. The plug groove 804 can be inserted into the middle operation plate 401. At this time, the movable work panel 8 is located on the upper and lower sides of the middle operation plate 401. The middle operation plate 401, the lower alignment plate 402 and the upper alignment plate 403 are all transparent glass panels.

[0024] During operation, the movable work panel 8 of this invention is slidably connected to the intermediate operation panel 401 via the insertion slot 804, and further assisted by the handle slot 803, which facilitates the user to quickly disassemble and assemble the movable work panel 8, and allows the operator to quickly clean the surface of the movable work panel 8.

[0025] As a further embodiment of the present invention, the coil plate rapid positioning and drying device includes a drying ring 801 and a snap-fit ​​groove 802. The snap-fit ​​groove 802 is formed on the surface of the movable working panel 8, and the coil plate can be positioned and snapped into the snap-fit ​​groove 802. The drying ring 801 is arranged around the snap-fit ​​groove 802, and the inner wall of the drying ring 801 is provided with drying holes.

[0026] During operation, the snap-fit ​​groove 802 of this invention serves as the fixed position of the coil board and the snap-fit ​​groove 802 serves as the bonding operation position. The drying hole of the drying ring 801 continuously outputs gas to dry the bonded coil board.

[0027] As a further embodiment of the present invention, a movable limiting member 7 is provided at the front end of the feeding conveyor belt 1. The movable limiting member 7 includes a fixed side plate 701, a movable side plate 702, and a front baffle 703. The fixed side plate 701 is fixedly disposed on the upper surface of the feeding conveyor belt 1 and is parallel to the moving direction of the feeding conveyor belt 1. The movable side plate 702 is parallel to the fixed side plate 701. The front baffle 703 is perpendicular to the front end of the fixed side plate 701 and the movable side plate 702. Both the front baffle 703 and the movable side plate 702 can be driven by a cylinder to perform linear motion. A fixed limiting member 6 is provided at the end of the feeding conveyor belt 1 away from the movable limiting member 7.

[0028] During operation, the feeding conveyor 1 in this invention is used to transport the coil plate. During the transport process, the movable side plate 702 pushes the coil plate close to the fixed side plate 701. When the coil plate moves to the position of the front baffle 703 and the front end is flush with the surface of the front baffle 703, the front baffle 703 moves upward, thereby ensuring that the coil plate enters the layer sequence recognition module 3 with the front end in a horizontal state. If the coil plate is placed in the layer sequence recognition module 3 and then reversed, it will affect the detection effect.

[0029] As a further embodiment of the present invention, a control unit is provided on one side of the feeding conveyor belt 1 and the rear conveyor belt 2. The control unit is electrically connected to the feeding positioning mechanism, the layer sequence recognition module 3, the visual alignment detection module 4 and the X-ray layer deviation detection module 5. An alarm execution mechanism is provided on one side of the layer sequence recognition module 3, the visual alignment detection module 4 and the X-ray layer deviation detection module 5. The alarm execution mechanism is electrically connected to the control unit.

[0030] During operation, the alarm actuator in this invention will issue an audible and visual alarm and stop the operation of the equipment after detecting stacking misalignment and layer offset exceeding the error range, thereby providing timely feedback of the error prevention information.

[0031] As a further embodiment of the present invention, the layer sequence recognition module 3 includes a barcode scanner and an image acquisition unit. The barcode scanner and the image acquisition unit can read the unique identification code and the special layer sequence pattern on the coil board, and can transmit the recognition information to the control unit.

[0032] During operation, the control unit in this invention is used to receive detection signals and determine whether the layer sequence is correct and whether the layer deviation is qualified. When the layer is misaligned or the layer deviation error is too large, the control unit drives the alarm actuator to trigger an alarm.

[0033] As a further embodiment of the present invention, the X-ray layer offset detection module 5 includes a microfocus X-ray source and a flat panel detector. The microfocus X-ray source and the flat panel detector can perform non-destructive testing on the pressed multilayer coil board and can calculate the layer offset values ​​in the X and Y directions.

[0034] During operation, this invention uses traditional imaging to identify alignment targets in each layer and outputs layer offset detection results.

[0035] A method for detecting layer misalignment in a multilayer coil board, the specific steps of which are as follows: Step 1: The coil board is conveyed into the layer sequence identification module 3 by the feeding conveyor belt 1 in the feeding and positioning mechanism, and the stacking order is verified by the layer sequence identification module 3; Step 2: After inspection, the coil board is moved to the vision alignment detection module 4 according to the stacking order by the feeding conveyor belt 1; Step 3: The visual alignment detection module 4 provides target images to the operator for pasting the coil board according to the pasting order; Step 4: After pasting, the multilayer coil board is moved to the X-ray layer offset detection module 5 by the rear conveyor belt 2 to perform non-destructive testing on the pressed multilayer coil board; Step 5: After the entire detection process is completed without any alarms or warnings, the multi-layer coil board is collected by the material collection and positioning mechanism.

Claims

1. A layer misalignment detection device for a multilayer coil board, comprising a feeding and positioning mechanism, a layer sequence recognition module (3), a visual alignment detection module (4), and an X-ray layer misalignment detection module (5), characterized in that: The feeding and positioning mechanism consists of a feeding conveyor belt (1) and a rear conveyor belt (2). The visual alignment detection module (4) is located between the feeding conveyor belt (1) and the rear conveyor belt (2). The layer sequence recognition module (3) is mounted above the upper conveyor belt (1). The X-ray layer deviation detection module (5) is located on the side of the rear conveyor belt (2) away from the visual alignment detection module (4). The visual alignment detection module (4) includes: An intermediate operating plate (401) is provided with a movable working panel (8) which is slidably arranged on the intermediate operating plate (401). A coil plate rapid positioning drying device is provided on the movable working panel (8). An upper alignment plate (403) and a lower alignment plate (402) are respectively disposed on the upper and lower sides of the intermediate operation plate (401). An alignment auxiliary turntable is provided on both the upper alignment plate (403) and the lower alignment plate (402). The alignment auxiliary turntable can project the target image onto the intermediate operation plate (401) in the order of pasting.

2. The layer offset detection device for a multilayer coil board according to claim 1, characterized in that: The alignment auxiliary turntable includes a rotating base (404) and a target image plate (405). Multiple sets of target image plates (405) are distributed equidistantly in a circle. A rotating motor is fixedly installed inside the rotating base (404). The output end of the rotating motor is fixedly connected to the center position of the disk formed by the multiple sets of target image plates (405). The rotating motor can drive the multiple sets of target image plates (405) to rotate around the center of the upper alignment plate (403) and the lower alignment plate (402).

3. The multilayer coil board layer offset detection device according to claim 2, characterized in that: The movable work panel (8) includes a plug slot (804) and a handle slot (803). The handle slot (803) is longitudinally provided through the end of the movable work panel (8). The plug slot (804) is transversely provided inside the movable work panel (8). The plug slot (804) can be inserted into the intermediate operation plate (401). At this time, the movable work panel (8) is located on the upper and lower sides of the intermediate operation plate (401). The intermediate operation plate (401), the lower alignment plate (402) and the upper alignment plate (403) are all transparent glass panels.

4. The multilayer coil board layer offset detection device and detection method according to claim 3, characterized in that: The coil plate rapid positioning and drying device includes a drying ring (801) and a snap-fit ​​groove (802). The snap-fit ​​groove (802) is opened on the surface of the movable working panel (8). The coil plate can be positioned and snapped into the snap-fit ​​groove (802). The drying ring (801) is arranged around the snap-fit ​​groove (802). The inner wall of the drying ring (801) is provided with drying holes.

5. The layer offset detection device for a multilayer coil board according to claim 1, characterized in that: The front end of the feeding conveyor belt (1) is provided with a movable limiting member (7). The movable limiting member (7) includes a fixed side plate (701), a movable side plate (702), and a front baffle (703). The fixed side plate (701) is fixedly disposed on the upper surface of the feeding conveyor belt (1) and is parallel to the moving direction of the feeding conveyor belt (1). The movable side plate (702) is parallel to the fixed side plate (701). The front baffle (703) is perpendicular to the front end of the fixed side plate (701) and the movable side plate (702). The front baffle (703) and the movable side plate (702) can both be driven by a cylinder to perform linear motion. A fixed limiting member (6) is provided at the end of the feeding conveyor belt (1) away from the movable limiting member (7).

6. The layer offset detection device for a multilayer coil board according to claim 1, characterized in that: A control unit is provided on one side of the feeding conveyor belt (1) and the rear conveyor belt (2). The control unit is electrically connected to the feeding positioning mechanism, the layer sequence recognition module (3), the visual alignment detection module (4) and the X-ray layer deviation detection module (5). An alarm execution mechanism is provided on one side of the layer sequence recognition module (3), the visual alignment detection module (4) and the X-ray layer deviation detection module (5). The alarm execution mechanism is electrically connected to the control unit.

7. The layer offset detection device for a multilayer coil board according to claim 6, characterized in that: The layer sequence recognition module (3) includes a barcode scanner and an image acquisition unit. The barcode scanner and the image acquisition unit can read the unique identification code and layer sequence special pattern on the coil board, and can transmit the recognition information to the control unit.

8. The layer offset detection device for a multilayer coil board according to claim 6, characterized in that: The X-ray layer offset detection module (5) includes a micro-focus X-ray source and a flat panel detector. The micro-focus X-ray source and the flat panel detector can perform non-destructive testing on the pressed multilayer coil board and can calculate the layer offset values ​​in the X and Y directions.

9. A method for detecting layer misalignment in a multilayer coil board, applicable to the multilayer coil board detection device according to any one of claims 1-8, characterized in that: The specific steps of the layer offset detection method for this multilayer coil board are as follows: Step 1: The coil board is conveyed through the feeding conveyor belt (1) in the feeding and positioning mechanism and the stacking sequence is verified by the stacking sequence identification module (3). Step 2: After inspection, the coil board is moved to the visual alignment detection module (4) according to the stacking order by the feeding conveyor belt (1); Step 3: The visual alignment detection module (4) provides target images for the operator to paste the coil board according to the pasting order; Step 4: The pasted multilayer coil board is moved to the X-ray layer offset detection module (5) by the rear conveyor belt (2) to perform non-destructive testing on the pressed multilayer coil board; Step 5: After the entire detection process is completed without any alarms or warnings, the multi-layer coil board is collected by the material collection and positioning mechanism.

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