Magnetic core dispensing and grinding machine

Abstract

A magnetic core dispensing grinding machine comprises a lower frame, an XYZ three-axis grinding moving platform, a double-track single-channel three-section variable-track streamline, an R-axis rotating suction vacuum assembly, a CCD bottom moving photographing assembly, and a grinding head quick-change assembly, which can simultaneously realize the technical solutions of magnetic core grinding, intelligent positioning, device identification and detection, and quick-change magnetic core conveying for layout.

Description

Technical Field

[0001] This invention relates to the field of magnetic core manufacturing technology, and more specifically, to the grinding process of magnetic cores for modular power supplies. Background Technology

[0002] Ferrite cores typically refer to sintered magnetic metal oxides composed of various iron oxide mixtures, such as manganese-zinc ferrite and nickel-zinc ferrite. Manganese-zinc ferrite has high permeability and high magnetic flux density, while nickel-zinc ferrite has extremely high impedance and low permeability of less than a few hundred. Ferrite cores are used in modular power supplies, coils, and transformers in various electronic devices. To improve core performance, the core needs to be ground.

[0003] For example, Chinese patent ZL 200920121825.3 discloses a through-type grinding machine with a double air gap grinding head for grinding magnetic cores, including a spindle grinding wheel, a first air gap grinding wheel located in front of the spindle grinding wheel, and a second air gap grinding wheel located behind the spindle grinding wheel. This allows for the complete processing of the air gap in E-type magnetic cores in a single pass, saving time and cost while ensuring the product performance of the E-type magnetic cores. This solution is only applicable to the air gap processing of E-type magnetic cores.

[0004] The air gap in a magnetic core refers to a portion of the magnetic circuit that is composed of air; hence, it's called an air gap, or simply air gap. Based on their shape, magnetic cores are typically classified into three types: E-type, I-type, and crown-type. When used in combination, such as with an EI-type core, there's always a gap between the E and I components, resulting in an air gap in the magnetic circuit. A notch in the center of a circular magnetic ring forms the air gap. In the process of grinding and bonding magnetic cores after adhesive is applied to the PCB board in products like transformers and power modules, the equipment used to evenly distribute the adhesive on the core surface and precisely control the air gap is usually called a core grinding device or core grinding machine. Core grinding machines are generally suitable for grinding various series of integrated magnetic cores, such as the EI series, RM series, ER series, and PQ series.

[0005] The core grinding process for modular power supplies typically has three main characteristics: (1) High-speed linear motors: Imported servo systems utilize high-speed linear motors to drive the spindle linearly. (2) X and Y axis linear motors are driven by imported servo systems, with linear encoders providing full closed-loop control, resulting in higher grinding speed and precision. (3) High-precision advanced cameras: Two sets of high-definition cameras are used for component identification and positioning.

[0006] However, there is currently no technical solution for a magnetic core grinding machine that simultaneously meets the requirements of magnetic core grinding, intelligent positioning, component identification and detection, and panel conveying. Furthermore, existing magnetic core grinding machines typically cannot detach or reposition magnetic cores or other components, and the inability to quickly and easily change the grinding head remains a significant weakness in the industry. Examples include CN223223139U, CN223572857U, CN109277939A, CN111604804A, and CN113290499A. Summary of the Invention

[0007] In view of the technical problems existing in the prior art, the present invention aims to provide a magnetic core dispensing and grinding machine, which is a technical solution for quickly changing magnetic cores by simultaneously realizing magnetic core grinding, intelligent positioning, device identification and detection, and assembly conveying.

[0008] Specifically, according to one aspect of the present invention, a magnetic core dispensing and polishing machine is provided, characterized in that it includes a lower frame, an XYZ three-axis polishing moving platform, a dual-track single-channel three-segment variable-track streamline, an R-axis rotary vacuum suction assembly, a CCD bottom moving imaging assembly, and a polishing head quick-change assembly, wherein... The lower frame is used to support the XYZ three-axis grinding moving platform, the dual-track single-channel three-section variable track streamline, the R-axis rotary vacuum suction assembly, the CCD bottom moving imaging assembly, and the grinding head quick-change assembly; The XYZ three-axis grinding moving platform is used to provide movement support for the various components of the grinding machine in the XYZ directions; A dual-rail, single-channel, three-section variable-track conveyor is used to provide transport for the workpiece being ground; R-axis rotary vacuum suction assembly, used for rotary vacuum adsorption of grinding heads; The bottom-mounted CCD camera module is used to take pictures of the grinding head. Grinding head quick-change assembly for quick replacement of grinding heads.

[0009] Preferably, according to the magnetic core dispensing and polishing machine, the characteristic is that, The XYZ triaxial grinding moving platform includes a left XYZ triaxial grinding moving platform and a right XYZ triaxial grinding moving platform; the R-axis rotary vacuum suction assembly includes a left R-axis rotary vacuum suction assembly and a right R-axis rotary vacuum suction assembly; and the grinding head quick-change assembly includes a left grinding head quick-change assembly and a right grinding head quick-change assembly.

[0010] Preferably, according to the magnetic core dispensing and polishing machine, the characteristic is that, The XYZ three-axis grinding moving platform includes a gantry frame for supporting the various components of the platform, slide rails for providing sliding for the various components of the platform, and direction axes for providing movement for the various components of the platform.

[0011] Preferably, according to the magnetic core dispensing and polishing machine, the characteristic is that, The R-axis rotary vacuum assembly includes a 360-degree rotating bearing, a rangefinder for measuring the distance between the grinding head and the workpiece being ground, and a light source for ambient lighting.

[0012] Preferably, according to the magnetic core dispensing and polishing machine, the characteristic is that, The dual-track single-channel three-section variable-track streamline includes a width PCB streamline for changing the distance to accommodate different spacings and a variable-pitch lifting mechanism for changing the height.

[0013] Preferably, according to the magnetic core dispensing grinding machine, the variable pitch streamline includes a variable pitch motor for realizing variable track drive, a support bar for reinforcing and supporting the variable pitch streamline, a synchronous pulley on the support bar, a synchronous belt on the synchronous pulley, a belt motor for conveying the workpiece to be ground along the slide rail direction via the synchronous belt, an inlet / outlet plate sensor for detecting the workpiece to be ground, a blocking cylinder equipped with a proximity sensor, a pressure plate for the workpiece to be ground, a pressure plate lifting cylinder, a linear bearing with a spring located on the pressure plate lifting cylinder, a guide rail with a variable pitch screw, a pressure plate slide rail for sliding the pressure plate, and a side-push cylinder for pushing the variable track streamline.

[0014] Preferably, according to the magnetic core dispensing grinding machine, the variable pitch lifting mechanism includes a lifting limiting component for lifting and limiting, a top plate for placing the workpiece to be ground, a flange bearing for supporting the top plate, a guide rod for lifting and guiding, a variable pitch lead screw, a lead screw lifting mechanism for lifting the variable pitch lead screw, an integrated servo motor for driving the lead screw lifting or driving the variable pitch lead screw, and a linear guide rail for sliding the variable pitch lifting mechanism.

[0015] Preferably, according to the magnetic core dispensing and grinding machine, the CCD bottom moving imaging component disposed below the R-axis rotating vacuum suction assembly includes a camera CCD with a lens, a tank chain for moving the CCD, an electric module for providing moving power, a mounting base plate and mounting bracket for mounting the camera CCD, and a light source for providing ambient lighting.

[0016] Preferably, according to the magnetic core dispensing and polishing machine, the quick-change assembly of the polishing head includes a quick-change stage and a calibration pressure sensor.

[0017] Preferably, according to the magnetic core dispensing and grinding machine, the quick-change platform includes a mounting bracket for mounting the quick-change platform, a protective sheet metal for protecting the quick-change platform, a clamping cylinder for clamping the platform, and a foolproof pin for preventing the grinding head from being replaced on the quick-change platform.

[0018] According to another aspect of the present invention, a grinding method using the magnetic core dispensing grinding machine as described above is also provided, characterized in that, after the workpiece to be ground flows into station one where the left grinding head quick-change stage is located, the right XYZ three-axis grinding moving platform drives the workpiece carrier carrying the top plate on which the workpiece to be ground is placed. The workpiece flows from the front end into station one and is blocked and stopped. After being blocked, the top plate is positioned upwards, and a camera takes a picture of the QR code on the top plate. The CCD scans the QR code, and after the CCD recognizes the MARK mark, it moves to a clearance position. A height sensor detects whether the workpiece being ground is abnormal. After automatically selecting a large magnetic core for grinding, the workpiece is blocked from falling and then released. The carrier lifting mechanism then descends, and the workpiece flows out to the second station where the right grinding head quick-change table is located. The small magnetic core is then processed and ground. After being blocked, the carrier is lifted and positioned. The CCD scans the code. After the CCD recognizes the QR code and marks it, it moves to the avoidance position. The height sensor detects whether the workpiece being ground is abnormal. After automatically selecting a small magnetic core for grinding, the workpiece is blocked from falling and then released. The carrier lifting mechanism then descends, and the workpiece flows out to the next workstation.

[0019] According to this invention, a rapid, non-stop shooting method is used to achieve high-speed flight centering and positioning during the imaging and recognition of the magnetic core. An optical system is equipped to effectively mark the MARK point and the magnetic core position. CCD-assisted programming enables automatic compensation and calibration positioning of the MARK point, resulting in high-quality and clear images. The dual-cantilever design uses linear motors for linear drive of the lifting spindles for X / Y axis translation and Z-axis rotation. The two cantilever arms do not interfere with each other, allowing the grinding station to operate independently. An imported linear grating ruler is used for full closed-loop feedback control of the X and Y axes. High-quality PU material is used to manufacture an oil-resistant, highly elastic, and anti-aging sealant. A suitable closing angle and moderate hardness ensure sealing performance and minimal friction. The sliding part of the reading head uses a proven, reliable, and durable bearing design, ensuring the optical sensing system can smoothly and stably glide on the grating ruler over a long period.

[0020] In this invention, the modular design of the dual-grinding head allows for quick replacement of the grinding head module. It can perform translational motion along the X / Y axes and rotational motion along the Z axis, enabling precise grinding actions in any direction, including up, down, left, right, forward, and backward. Equipped with a pressure sensor, it provides alarm prompts and operational protection commands in case of overpressure. The position, speed, and height of the grinding head can be set via the grinding head library parameters. The conveyor belt employs a dual-rail, single-channel, three-section transport method to achieve simultaneous operation at two workstations. The width of the workpiece being ground (such as a PCB board) can be automatically adjusted. The functions of magnetic core grinding, intelligent positioning, component identification and detection, and panel conveying can be achieved simply by setting the data and technical parameters of the workpiece being ground (such as a PCB board) in the control software interface. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a magnetic core dispensing and polishing machine according to a specific embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram illustrating the overall structure of the human-machine interface (top view) of a magnetic core dispensing and polishing machine according to a specific embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the dual-gantry three-axis module structure of a magnetic core dispensing and polishing machine according to a specific embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram illustrating the structure of the quick-change mechanism module for the grinding head of a magnetic core dispensing grinding machine according to a specific embodiment of the present invention.

[0025] Figure 5 This is a structural schematic diagram from the rear view of the variable-pitch streamline module of the magnetic core dispensing and polishing machine according to a specific embodiment of the present invention.

[0026] Figure 6 This is a structural schematic diagram from the rear view of the variable-pitch streamline module of the magnetic core dispensing and polishing machine according to a specific embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram illustrating the structure of the lifting and pitching mechanism module of a magnetic core dispensing and polishing machine according to a specific embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram illustrating the structure of the CCD bottom imaging mechanism of a magnetic core dispensing and polishing machine according to a specific embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram illustrating the structure of the quick-change stage of a magnetic core dispensing and polishing machine according to a specific embodiment of the present invention.

[0030] Figure 10 This is a flowchart illustrating the operation of a magnetic core dispensing and polishing machine according to a specific embodiment of the present invention.

[0031] Attached label: 1-Lower frame; 2-Left XYZ three-axis grinding moving platform; 3-Right XYZ three-axis grinding moving platform; 4-Dual-rail single-channel three-section variable track streamline; 5-Left R-axis rotary vacuum suction assembly; 6-Right R-axis rotary vacuum suction assembly; 7-CCD bottom moving imaging assembly; 8-Left grinding head quick change platform (left station, grinding station 1, A); 9-Right grinding head quick change platform (right station, grinding station 2, B); 10-Left pressure monitoring display; 11-Right pressure monitoring display; 12-PCB limit plate; 13-Side push cylinder; 14-Top plate; 21-Gantry frame; 41-Variable pitch streamline (slide rail); 42-Variable pitch lifting mechanism; 51-CCD1; 52-Left quick change mechanism module light source; 53-Left rangefinder height probe; 54-Left bearing; 55-Left foolproof recognition function assembly; 61-CCD2; 62-Right quick-change mechanism module light source; 63-Right rangefinder height sensor; 64-Right bearing; 65-Right foolproof identification function component; 71-Tank chain; 72-Electric module; 73-Mounting base plate; 74-Light source of CCD bottom imaging mechanism; 75-Lens; 76-Mounting bracket; 81-Left mounting bracket; 82-Left clamping cylinder; 83-Left foolproof pin; 84-Left protective sheet metal; 85-Left calibration pressure sensor; 91-Right mounting bracket; 92-Right clamping cylinder; 93-Right foolproof pin; 94-Right protective sheet metal; 95-Right calibration pressure sensor; 100-Grinding head; 121-Pressure plate slide rail; 123-Variable pitch screw; 124-Guide rail with variable pitch screw ; 125-Linear bearing with spring; 126-Pressure plate lifting cylinder; 127-Blocking cylinder with proximity sensor; 1221-Left entry / exit plate sensor; 1222-Right entry / exit plate sensor; 141-Black POM support block; 142-Quick change module; 143-Variable pitch screw; 1441-Left integrated servo motor; 1442-Right integrated servo motor; 145-Linear guide rail; 146-Screw lifting; 147-Guide rod; 148-Flange bearing; 149-Top plate QR code; 411-Variable pitch synchronization assembly; 412-Synchronization assembly; 413-Variable pitch motor; 414-Belt motor; 415-Support bar; 421-Lifting limit assembly. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Those skilled in the art will understand that this description is exemplary and that the present invention is not limited to these specific embodiments.

[0033] For ease of explanation, the workpiece to be ground in this invention is illustrated using a PCB board as an example. To demonstrate the applicability of this invention, a 9-grid PCB board, i.e., a 9-panel PCB board, is used for illustration.

[0034] The performance of the magnetic core dispensing and polishing machine of this invention will be briefly described below. In this invention, the magnetic core is polished on the PCB module after dispensing to spread the glue, with the glue overflowing the edge of the magnetic core by 0.5mm and passing by 0.5mm. During the debugging of the polishing machine, the magnetic core polishing program is selected as: 31A306-ZYM1-V1 (shared by 31A306 series, 31D307 series, and 31E308 series). The polishing parameters are set as follows: ① Large magnetic core: Polishing pressure: 1500g-2500g (X, Y direction), polishing times: 3 times (X, Y direction), X direction: 0.25mm, Y direction: 0.175mm, end point returns to the midpoint; ② Small magnetic core polishing: Polishing pressure: 1500g-2500g (X, Y direction), polishing times: 3 times (X direction), X direction: 0.19mm, end point returns to the midpoint, Y direction polishing pressure, number of times, and values ​​are all 0; MES control is activated. First piece quality confirmation: 1. Adhesive overflow from the magnetic core edge ≤ 0.5mm; 2. Adhesive spread length for small magnetic cores > 75% of the length of the small magnetic core body; the adhesive spread width must cover the width of the copper strip. If it cannot cover it, the spread area must be 40mm. 2 ~54mm 2 3. The adhesive application area for the large magnetic core should be 60% to 90% of the contact area between the magnetic core and the copper strip, with a coverage area of ​​66.5 mm. 2 -101mm 2 .

[0035] Figure 1 This is a schematic diagram illustrating the overall structure of a magnetic core dispensing and polishing machine according to a specific embodiment of the present invention. For example... Figure 1 As shown, the magnetic core dispensing polishing machine includes a lower frame 1, XYZ three-axis polishing moving platforms 2 and 3, a dual-track single-channel three-section variable-track streamline 4, an R-axis rotary vacuum suction assembly 5 and 6, a CCD bottom moving imaging assembly 7, and polishing head quick-change assemblies 8 and 9. The lower frame 1 supports the XYZ three-axis polishing moving platforms 2 and 3, the dual-track single-channel three-section variable-track streamline 4, the R-axis rotary vacuum suction assembly 5 and 6, the CCD bottom moving imaging assembly 7, and the polishing head quick-change assemblies 8 and 9. The XYZ three-axis polishing moving platforms 2 and 3 provide movement support for the various components of the polishing machine in the XYZ directions. The dual-track single-channel three-section variable-track streamline 4 provides PCB transport. The R-axis rotary vacuum suction assembly 5 and 6 is used to rotate and vacuum-adsorb the polishing head. The CCD bottom moving imaging assembly 7 is used to photograph the polishing head. The polishing head quick-change assembly 7 is used for quick replacement of the polishing head.

[0036] The grinding machine of this invention is suitable for grinding both large and small magnetic cores. Figure 1 In the middle, the left grinding head quick-change assembly 8 is used for grinding large magnetic cores, and the right grinding head quick-change assembly 9 is used for grinding small magnetic cores. Figure 1In the middle, the operator stands facing directly to this side. And... Figure 2 In this case, the operator stands on the inside of the paper, meaning that... Figure 2 and Figure 1 The left and right directions are exactly opposite.

[0037] like Figure 2 As shown, the dual-track single-channel three-section variable-track streamline 4 includes a variable-pitch streamline 41 for changing the distance to accommodate different spacings and a variable-pitch lifting mechanism 42 for changing the height.

[0038] The XYZ three-axis grinding moving platform includes a left XYZ three-axis grinding moving platform 2 and a right XYZ three-axis grinding moving platform 3. The R-axis rotary vacuum suction assembly includes a left R-axis rotary vacuum suction assembly 5 and a right R-axis rotary vacuum suction assembly 6. The grinding head quick-change assembly includes a left grinding head quick-change assembly 8 and a right grinding head quick-change assembly 9. The positions of the left grinding head quick-change assembly 8 and the right grinding head quick-change assembly 9 are also referred to as the left workstation and the right workstation, or workstation one and workstation two. The PCB board flows from left to right along the double-rail single-channel three-segment variable-track flow line 4 from workstation one to workstation two and then to the next workstation.

[0039] The grinding shaft is moved above the large magnetic core, and the Z-axis is moved to a certain height to maintain a constant pressure setting. An alarm is triggered when overpressure is detected on the pressure display device 10 on the magnetic core grinding head. The grinding shaft is moved above the small magnetic core, and the Z-axis is moved to a certain height to maintain a constant pressure setting. An alarm is triggered when overpressure is detected on the pressure display device 11 on the magnetic core grinding head.

[0040] like Figure 3 As shown, the XYZ three-axis grinding moving platforms 2 and 3 include a gantry frame 21 for supporting the various components of the platform, a slide rail 41 for providing sliding for the various components of the platform, and direction axes (X1, Y1, Z1) for providing movement for the various components of the platform. Figure 3 In the diagram, the vertical horizontal axes are labeled as X1 (left) and X2 (right), the horizontal axes are labeled as Y1 (left) and Y2 (right), and the vertical axes in the height direction are labeled as Z1 (left) and Z2 (right).

[0041] like Figure 4 As shown, the left and right R-axis rotating vacuum suction components 5 and 6 include 360-degree rotating bearings 54 and 64, a rangefinder probe 53 and 63 for measuring the distance between the grinding head and the PCB board, and a light source 52 and 62 for ambient lighting.

[0042] like Figure 5 , 6As shown, the variable pitch streamline 41 includes a variable pitch motor 413 for realizing variable track drive, a support bar 415 for reinforcing and supporting the variable pitch streamline, a synchronization component 412 disposed on the support bar, the synchronization component 412 including a synchronization pulley and a synchronization belt disposed on the synchronization pulley, a belt motor 414 (two motors, one on each side) for conveying the workpiece to be ground along the slide rail direction through the synchronous belt, an inlet / outlet plate sensor 1222 for detecting the workpiece to be ground, a blocking cylinder 127 provided with a proximity positioning sensor, and a PCB limiting pressure plate 12 ( Figure 2 (shown) Pressure plate upper and lower cylinders 126 (one on the top and one on the bottom), linear bearings 125 with springs located on the pressure plate upper and lower cylinders 126, guide rails 124 (two on the left and one on the right) with variable pitch screws 123 (two on the top and one on the bottom), pressure plate slide rails 121 (two on the bottom) for sliding the pressure plate 12, and side push cylinders 13 for side push and change the track flow.

[0043] like Figure 7 As shown, the variable pitch lifting mechanism 42 includes a lifting limit assembly 421 for lifting limit (…). Figure 5 The components include: a top plate 14 for placing the workpiece to be ground; four flange bearings 148 for supporting the top plate; four guide rods 147 for lifting and guiding; a variable pitch lead screw 143 (located directly below the top plate 14); a lead screw lifting mechanism 146 for lifting the variable pitch lead screw 143; integrated servo motors 1441 and 1442 for driving the lead screw lifting mechanism 146 or the variable pitch lead screw 143; and linear guide rails 145 (one on each side) for sliding the variable pitch lifting mechanism 42.

[0044] like Figure 8 As shown, the CCD bottom moving imaging assembly 7, which is set below the R-axis rotating vacuum suction assemblies 5 and 6, includes camera CCDs 51 and 61 with lenses 75 (one for each of the left and right R-axis rotating vacuum suction assemblies 5 and 6), a tank chain 71 for moving the CCD, an electric module 72 for providing the power for movement, a mounting base plate 73 and a mounting bracket 76 for mounting the camera CCD, and a light source 74 for providing ambient lighting.

[0045] like Figure 9 As shown, the quick-change grinding head assemblies 8 and 9 include a quick-change platform and calibration pressure sensors 85 and 95 (one on each side). The quick-change platform includes mounting brackets 81 and 91 (one on each side) for mounting the quick-change platform, protective sheet metal 84 and 94 (one on each side) for protecting the quick-change platform, clamping cylinders 82 and 92 (one on each side) for clamping the platform, and anti-foolproof pins 83 and 93 (one on each side) for preventing the grinding head from being replaced on the quick-change platform.

[0046] In another embodiment of the present invention, a grinding method using the magnetic core dispensing grinding machine of the present invention is also provided, such as... Figure 10 As shown, after the PCB board flows into station 8, where the left grinding head quick-change table is located, the right XYZ three-axis grinding moving platform 3 drives the top plate 14 carrying the PCB board on the PCB board carrier. The PCB board flows from the front end into station 8 and is blocked. After being blocked, the top plate 14 is positioned upwards. The upper camera takes a picture of the QR code 149 on the top plate 14 and scans it with a CCD. After the CCD recognizes the QR code MARK 149, it moves to a clearance position (using the R-axis rotating vacuum suction components 5 and 6 to rotate it away from the grinding head position). The height sensor (i.e., the rangefinder) detects the height. 53) Detect whether the workpiece being ground is abnormal. After automatically selecting the large magnetic core for grinding, the blocking and release mechanism is activated, and the carrier lifting mechanism is lowered. The workpiece being ground flows out to the station 2, position 9 where the right grinding head quick-change table is located. The small magnetic core is then processed and ground. After blocking, the carrier is positioned and the CCD scans the code. After the CCD recognizes the QR code MARK 149, it moves to the avoidance position. The height sensor (i.e., the rangefinder height sensor 63) is used to detect whether the workpiece being ground is abnormal. After automatically selecting the small magnetic core for grinding, the blocking and release mechanism is activated, and the carrier lifting mechanism is lowered. The workpiece being ground flows out to the next workstation.

[0047] In a preferred embodiment, the specific process is broken down as follows: 1. The fixture (clamping components for the nine-grid PCB panel, including top plate 14, pressure plate 12, etc.) runs along the double-rail single-channel three-section variable-track flow line 4 from left to right from the front end ( Figure 1 The leftmost Figure 2 The rightmost one flows into the blocking stop of station number one (through blocking cylinder 127).

[0048] 2. The side push cylinder 13 pushes the PCB board against the fixed side streamline side and then retracts the side push cylinder 13. The lifting screw (146) lifts the fixture, and the pressure plate clamping cylinders 82 and 92 press the PCB product.

[0049] 3. The upper camera (i.e., the CCD bottom moving photographing component 7) takes a picture and scans the QR code 149 on the fixture. Because the lens is facing upwards, the CCD bottom moving photographing component 7 is also called the upper camera. In fact, it is located at the bottom of the R-circumferential rotating vacuum suction components 5 and 6.

[0050] 4. After taking a picture of the PCB Mark cursor 149 and positioning it, move the camera to a clearance position.

[0051] 5. The height sensor, also known as the distance measuring instrument, moves axis 53 to the magnetic core of the first cavity product to measure the height. Figure 1 , Figure 9The diagram shows the quick-change grinding head placed in three holes (the first hole usually refers to the leftmost hole). The height sensor 53 detects whether the PCB is abnormally out of limit.

[0052] 6. Move the grinding shaft above the large magnetic core, move the Z-axis to a certain height to maintain a constant pressure setting value, and issue an alarm when the pressure display device 10 on the magnetic core grinding head shows overpressure. 7. Perform translational motion on the X / Y axes (via the XYZ three-axis grinding moving platform 2 and 3) and rotational motion on the Z axis (via the R-axis rotating vacuum suction component), enabling precise grinding actions in any direction such as up, down, left, right, forward, and backward; the position, speed, height, and other parameters of the grinding head can be set through the grinding head library parameters.

[0053] 8. The grinding shaft moves to the clearance position, the pressure plate 12 presses down the cylinder 126, the lifting 42 lowers the PCB board back to the conveyor belt, the blocking descends, and the PCB board flows into station 2 9 to process and grind the small magnetic core.

[0054] 9. The fixture flows from station 1 (8) to station 2 (9) where it is blocked and stopped.

[0055] 10. The side-push cylinder 13 pushes the PCB board against the fixed side streamline side and then retracts the side-push cylinder 13. The lifting screw (146) lifts the fixture and the pressure plate clamping cylinder 126 presses the PCB product.

[0056] 11. Use camera 7 to scan the QR code 149 on the fixture.

[0057] 12. After taking pictures of the PCB Mark cursors on camera 7 and positioning them, move the camera to a clearance position.

[0058] 13. The height sensor 63 moves its axis to the small magnetic core of the first cavity product to detect the height. The height sensor 63 detects whether the PCB is abnormally over the limit.

[0059] 14. Move the grinding shaft above the small magnetic core, move the Z-axis to a certain height to maintain a constant pressure setting value, and issue an alarm prompt when the pressure display device 11 on the magnetic core grinding head shows overpressure. 15. Perform translational motion along the X / Y axis and rotational motion along the Z axis, enabling precise grinding actions in any direction, including up, down, left, right, forward, and backward. The position, speed, height, and other parameters of the grinding head can be set through the grinding head library.

[0060] 16. The grinding shaft moves to the clearance position, the pressure plate presses down the cylinder 126, the PCB board is lifted and lowered back onto the conveyor belt, the blocking descends, and the PCB board flows into the next station.

[0061] According to this invention, a rapid, non-stop imaging method is used to achieve high-speed flight centering and positioning during the imaging and recognition of the magnetic core. An optical system is equipped to effectively locate the MARK points and the magnetic core position. CCD-assisted programming enables automatic compensation and calibration positioning of the MARK points, resulting in high-quality, clear images and significantly reduced CT time (plate changeover cycle). The CT times for both large and small magnetic cores are shown in the table below:

[0062] The present invention has been described in detail above through specific embodiments. However, those skilled in the art will understand that various modifications and changes can be made. As long as they do not depart from the spirit and purpose of the present invention, all such modifications and changes should fall within the protection scope of the present invention, which is defined by the appended claims.

Claims

1. A magnetic core dispensing and grinding machine, characterized in that, This includes a lower frame, an XYZ three-axis grinding moving platform, a dual-rail single-channel three-section variable-track streamlined assembly, an R-axis rotary vacuum suction assembly, a CCD bottom moving imaging assembly, and a grinding head quick-change assembly. The lower frame is used to support the XYZ three-axis grinding moving platform, the dual-track single-channel three-section variable track streamline, the R-axis rotary vacuum suction assembly, the CCD bottom moving imaging assembly, and the grinding head quick-change assembly; The XYZ three-axis grinding moving platform is used to provide movement support for the various components of the grinding machine in the XYZ directions; A dual-rail, single-channel, three-section variable-track conveyor is used to provide transport for the workpiece being ground; R-axis rotary vacuum suction assembly, used for rotary vacuum adsorption of grinding heads; The bottom-mounted CCD camera module is used to take pictures of the grinding head. Grinding head quick-change assembly for quick replacement of grinding heads.

2. The magnetic core dispensing and polishing machine, characterized in that, The XYZ triaxial grinding moving platform includes a left XYZ triaxial grinding moving platform and a right XYZ triaxial grinding moving platform; the R-axis rotary vacuum suction assembly includes a left R-axis rotary vacuum suction assembly and a right R-axis rotary vacuum suction assembly; and the grinding head quick-change assembly includes a left grinding head quick-change assembly and a right grinding head quick-change assembly.

3. The magnetic core dispensing and polishing machine according to claim 1 or 2, characterized in that, The XYZ three-axis grinding moving platform includes a gantry frame for supporting the various components of the platform, slide rails for providing sliding for the various components of the platform, and direction axes for providing movement for the various components of the platform.

4. The magnetic core dispensing and polishing machine according to claim 1 or 2, characterized in that, The R-axis rotary vacuum assembly includes a 360-degree rotating bearing, a rangefinder for measuring the distance between the grinding head and the workpiece being ground, and a light source for ambient lighting.

5. The magnetic core dispensing and polishing machine according to claim 1 or 2, characterized in that, The dual-track single-channel three-section variable-track streamline includes a variable-pitch streamline for changing distance to accommodate different spacings and a variable-pitch lifting mechanism for changing height.

6. The magnetic core dispensing and polishing machine according to claim 5, characterized in that, The variable pitch streamline includes a variable pitch motor for driving the variable track, a support bar for reinforcing and supporting the variable pitch streamline, a synchronous pulley on the support bar, a synchronous belt on the synchronous pulley, a belt motor for conveying the workpiece to be ground along the slide rail direction via the synchronous belt, an inlet / outlet sensor for detecting the workpiece to be ground, a blocking cylinder equipped with a proximity sensor, a pressure plate for the workpiece to be ground, a pressure plate lifting cylinder, a linear bearing with a spring located on the pressure plate lifting cylinder, a guide rail with a variable pitch screw, a pressure plate slide rail for sliding the pressure plate, and a side-push cylinder for pushing the variable track streamline.

7. The magnetic core dispensing and polishing machine according to claim 5 or 6, characterized in that, The variable pitch lifting mechanism includes a lifting limiting component for lifting and limiting, a top plate for placing the workpiece to be ground, a flange bearing for supporting the top plate, a guide rod for lifting and guiding, a variable pitch lead screw, a lead screw lifting mechanism for lifting the variable pitch lead screw, an integrated servo motor for driving the lead screw lifting or driving the variable pitch lead screw, and a linear guide rail for sliding the variable pitch lifting mechanism.

8. The magnetic core dispensing and polishing machine according to claim 1 or 2, characterized in that, The CCD bottom moving imaging assembly, located below the R-axis rotating vacuum suction assembly, includes a camera CCD with a lens, a tank chain that provides movement for the CCD, an electric module that provides the power for movement, a mounting base and mounting bracket for mounting the camera CCD, and a light source for providing ambient lighting.

9. The magnetic core dispensing and polishing machine according to claim 1 or 2, characterized in that, The quick-change grinding head assembly includes a quick-change platform and a calibration pressure sensor. The quick-change platform includes a mounting bracket for mounting the quick-change platform, a protective sheet metal for protecting the quick-change platform, a clamping cylinder for clamping the platform, and a foolproof pin for preventing the grinding head from being replaced on the quick-change platform.

10. A grinding method using a magnetic core dispensing and grinding machine as described in any one of claims 1-9, characterized in that, After the workpiece to be ground flows into station one, where the left grinding head quick-change table is located, the right XYZ three-axis grinding moving platform moves the workpiece carrier with the top plate carrying the workpiece to be ground. The workpiece flows from the front end into station one and is blocked. After being blocked, the top plate is positioned upwards. The upper camera photographs the QR code on the top plate, and the CCD scans the code. After the CCD recognizes the QR code and marks it, it moves to a clearance position. A height sensor detects whether the workpiece to be ground is abnormal. If the large magnetic core is selected for grinding, the blocking mechanism lowers and releases the workpiece. The carrier's lifting mechanism lowers, and the workpiece flows out to station two, where the right grinding head quick-change table is located. The small magnetic core is then processed and ground. After being blocked, the carrier is positioned upwards, the CCD scans the code, recognizes the QR code and marks it, and moves to a clearance position. A height sensor detects whether the workpiece to be ground is abnormal. If the small magnetic core is selected for grinding, the blocking mechanism lowers and releases the workpiece. The carrier's lifting mechanism lowers, and the workpiece flows out to the next station.

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