An aluminum-based copper-clad plate anodic oxidation film compactness detection device and method thereof

Abstract

The application relates to the technical field of material surface detection, and discloses an aluminum-based copper-clad plate anodic oxidation film compactness detection device and method, which solves the problem of low detection precision, and comprises a supporting mechanism, a moving mechanism, a pressure applying mechanism, a measuring mechanism and a detection mechanism; the detection mechanism adopts an ultrahigh-speed line laser profile measuring instrument, is fixed to the side of the pressure applying mechanism, and can realize real-time scanning detection of scratches drawn by a detection pen on the surface of the oxidation film; the detection method combines fixed-pressure scraping with line laser scanning, automatically extracts the maximum scratch depth, and judges the compactness grade; the application solves the problems of low detection precision, complicated installation and complex structure in the prior art, and can be widely applied to production quality detection of aluminum-based copper-clad plate anodic oxidation films.

Description

Technical Field

[0001] This invention belongs to the field of material surface testing technology, specifically a device and method for detecting the density of anodized film on aluminum-based copper clad laminates. Background Technology

[0002] Aluminum-based copper-clad laminates combine the corrosion resistance of aluminum with the high conductivity of copper, making them widely used in power electronics, new energy vehicles, and rail transportation. Anodizing is a key process for improving the surface properties of aluminum-based copper-clad laminates. The density of the resulting alumina film directly determines the product's corrosion resistance, wear resistance, and service life; therefore, rapid and accurate testing of the density of the anodized film is necessary.

[0003] Currently, the industry's testing methods for the density of anodized films on aluminum-based copper clad laminates are mainly divided into two categories: qualitative testing and quantitative testing. Qualitative testing is mainly based on visual inspection, relying on operators to observe the surface condition after scratches with the naked eye or a magnifying glass to determine whether the oxide film has obvious peeling, flaking, or damage. This method is simple to operate but highly subjective, and cannot identify micro-scratches and internal pore defects that are invisible to the naked eye, resulting in a very high rate of missed detection.

[0004] Quantitative detection mainly includes two categories: resistance method and mechanical scratch method. The resistance method determines whether the oxide film is completely broken through by measuring the change in resistance between the aluminum and copper layers at the scratch. It can only detect deep penetrating scratches and has no response to shallow scratches that do not penetrate or surface plastic deformation. These defects will gradually expand and lead to later failure. The mechanical scratch method, represented by the grating ruler scratch method, applies constant pressure to scratch the oxide film surface and uses the grating ruler to measure the displacement of the push-pull force gauge housing to indirectly calculate the scratch depth. Although this method achieves quantitative detection, it has many inherent defects: First, the measurement principle has limitations. The fundamental errors are as follows: First, the grating ruler measures the overall displacement of the push-pull force gauge housing rather than the actual depth of the scratch. It is affected by mechanical clearance, installation stress, spring deformation, etc., resulting in large measurement deviations. Second, the installation and debugging are difficult. It is necessary to maintain strict parallelism with the scratch direction. Even a small angular deviation will lead to distorted results, which requires high operator skills. Third, the detection results are incomplete. It can only output the average displacement and cannot capture local deep scratches and defects, making it easy to miss defective products. Fourth, the device has a complex structure, requires multiple detection elements, has high manufacturing costs, many failure points, and is difficult to maintain. Furthermore, while the improved point laser solution addresses some issues with the grating ruler, it requires micron-level precision alignment with the scratch trajectory, resulting in extremely low installation tolerance; even slight deviations lead to detection failure. Additionally, all existing scratch detection technologies are designed for homogeneous single-metal sheets, neglecting the inherent warping of aluminum-copper bimetallic composite plates due to differences in thermal expansion coefficients, and the dual contact force system error introduced by the lateral friction of the cantilevered detection pen. These errors only have a significant impact on the detection results in specific testing scenarios involving "thin anodized film + low-range spring constant pressure + cantilevered stylus." The field of general material scratch testing has neither identified this technical problem nor proposed a corresponding solution. Moreover, existing grating rulers and point laser sensors can only output single depth or displacement data, failing to simultaneously acquire local height differences on the board surface and the cross-sectional morphology of the scratch. Therefore, the hardware principle lacks the basis for correcting these two types of system errors. To address these issues, this invention proposes a device and method for detecting the density of anodized film on aluminum-based copper-clad laminates. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a device and method for detecting the density of anodized film on aluminum-based copper clad laminate, which effectively solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a density detection device for anodized film on aluminum-based copper clad laminate, comprising a support mechanism, a moving mechanism at the top of the support mechanism, a pressure applying mechanism at the end of the moving mechanism, a measuring mechanism inside the pressure applying mechanism, and a detection mechanism at one end of the side wall of the pressure applying mechanism;

[0007] The support mechanism includes a bracket, the end of which is detachably connected to the horizontal moving rail of the moving mechanism, and the end of the horizontal moving rail is tightly fitted with a lifting rail;

[0008] The lifting rail end is detachably connected to the pressure chamber of the pressure applying mechanism. A disassembly rod is slidably connected inside the pressure chamber. A detection pen is provided at the lower end of the disassembly rod, and a support tube is fixed at the top of the disassembly rod.

[0009] A pointer shaft is hinged to the pressure chamber, and the pointer shaft is fixedly connected to a gear of the measuring mechanism. The gear meshes with a rack, and the inner side of the rack is fixedly connected to the support tube through a fixing strip.

[0010] The detection mechanism includes an ultra-high-speed profile measuring instrument, and the ultra-high-speed profile measuring instrument is equipped with a control panel on its top.

[0011] The ultra-high-speed profile measuring instrument scans the scratch profile data of the anodic oxide film on the surface of the aluminum-based copper-clad laminate in real time using the detection pen, and transmits the scanned data to the control panel in real time. The control panel processes the received profile data to obtain the scratch depth and determines the density of the anodic oxide film on the aluminum-based copper-clad laminate based on the scratch depth.

[0012] Preferably, the support mechanism further includes a support, the bottom of which is detachably connected to a plurality of anti-slip blocks, and the support is provided with a connecting groove;

[0013] The support and the bracket are detachably connected by disassembly bolts;

[0014] The top of the support is detachably connected to a positioning strip via several positioning strip bolts.

[0015] Preferably, a fixing block is fixed to the top of the bracket, and the fixing block is detachably connected to the horizontal moving rail by fixing bolts;

[0016] A horizontal moving slider is slidably connected inside the horizontal moving rail, and a horizontal moving screw is hinged inside the horizontal moving rail. The horizontal moving screw is engaged with the horizontal moving slider, and a horizontal moving handle is fixed to one end of the horizontal moving screw.

[0017] Preferably, a lifting slider is fixed to the end of the horizontally moving slider, the lifting slider is slidably connected to the lifting rail, a lifting screw is hinged inside the lifting rail, the lifting screw is engaged with the lifting slider, and a lifting handle is fixed to the top of the lifting screw.

[0018] Preferably, a compression force-measuring spring is fixed to the top of the support tube, the top of the compression force-measuring spring is fixedly connected to the inner top wall of the pressure chamber, a force-measuring column is fixed to the top of the support tube, the force-measuring column is slidably connected to the pressure chamber, a vibration damping pad is also fixed inside the pressure chamber, and a detection pen positioning tube is fixed to the bottom of the disassembly rod;

[0019] The detection pen positioning tube is slidably connected to the detection pen, and the detection pen is provided with a detection pen positioning hole. The detection pen positioning bolt passes through the detection pen positioning hole and the through hole on the detection pen positioning tube.

[0020] Preferably, a support frame is detachably connected to the end of the lifting rail, the support frame is detachably connected to the pressure chamber, and a pressure gauge is detachably connected to the end of the pressure chamber;

[0021] A positioning tube is fixed inside the pressure chamber, and a slider is fixed inside the positioning tube. The slider is slidably connected to the groove inside the gear.

[0022] A pointer is fixed to the outside of the pointer axis;

[0023] The linear compression of the compression spring is converted into the rotation angle of the pointer by the gear. The scale is provided with pressure scale, and the pressure scale and the rotation angle of the pointer are linearly corresponding one-to-one.

[0024] Preferably, a positioning rod is fixed to one side of the rack via a connecting strip, a brake strip is fixed to the inner wall of the positioning rod, a brake tube is tightly fitted inside the brake strip, a zeroing button is fixed to the outer side of the brake tube, and the zeroing button is slidably connected to the pressure chamber.

[0025] A support plate is fixed inside the brake pipe, a reset rod is fixed inside the support plate, a reset plate is slidably connected to the outside of the reset rod, and the reset plate is fixedly connected to the pressure chamber.

[0026] A reset spring is also fixed to the inner side of the support plate, and the other end of the reset spring is fixedly connected to the reset plate.

[0027] Preferably, a support block is detachably connected to the side wall of the support frame by bolts. The support block is fixedly connected to the ultra-high-speed profile measuring instrument at its bottom and to the control panel at its top. One end of the ultra-high-speed profile measuring instrument is provided with a rechargeable battery that is fixedly connected to the support block.

[0028] This invention also provides a method for detecting the density of anodized films on aluminum-based copper clad laminates, based on the density detection device for anodized films on aluminum-based copper clad laminates as described above, comprising the following steps:

[0029] Step 1: Install the entire device. Fix the bracket by removing the bolts, fix the fixing block to the horizontal moving rail by fixing the bolts, fix the positioning strip on the top of the support by positioning strip bolts, install the detection pen inside the detection pen positioning tube by the detection pen positioning bolts, fix the support block by bolts and perform self-inspection, place the aluminum-based copper-clad plate on the top of the support and abut against the side wall of the positioning strip, and press and fix the aluminum-based copper-clad plate to the support surface by two M3 pressure plate bolts;

[0030] Step 2: Press the zeroing button to move the brake tube inward. Due to the action of the compression spring, the support tube descends. Due to the action of the damping pad, the support tube is damped. When the support tube descends, the rack follows, causing the gear to rotate and driving the pointer to rotate, thus completing the zeroing. Release the zeroing button.

[0031] Step 3: Rotate the lifting handle as needed to rotate the lifting screw. At this time, since the height of the lifting slider is fixed, the lifting rail descends, causing the pressure chamber to descend until the test pen is in close contact with the surface of the anodized layer of the aluminum-based copper-clad laminate. Continue to fine-tune the lifting handle to raise the support tube, causing the compression spring to compress and deform, which in turn causes the rack to rise, thereby causing the gear to rotate and the pointer to rotate around the pointer axis. At this time, the gear converts the linear compression of the compression spring into the rotation angle of the pointer. The rotation angle of the pointer corresponds to the pressure scale value on the indicator dial, thus obtaining the pressure value of the test pen. When the required measurement pressure value is met, stop rotating the lifting handle.

[0032] Step 4: Control the operation of the ultra-high-speed profile measuring instrument and control panel. Rotate the horizontal movement handle. Due to several M3 pressure plate bolts, the aluminum-based copper-clad laminate is prevented from moving. Rotating the horizontal movement handle can drive the horizontal movement screw to rotate, which in turn drives the horizontal movement slider to move, causing the lifting rail to move, which in turn drives the pressure chamber to move synchronously, causing the disassembly rod to move synchronously, and causing the detection pen to move on the surface of the anodized film of the aluminum-based copper-clad laminate.

[0033] Step 5: When the pressure chamber moves, the support block moves accordingly. The ultra-high-speed profile measuring instrument scans the surface of the aluminum-based copper-clad laminate in real time and transmits the scanned data to the control panel. The control panel performs real-time correction of the reference plane, correction of board warping force deviation, and correction of lateral friction force deviation on the data. If the ultra-high-speed profile measuring instrument does not detect scratches or the scratch depth is within the set threshold range, it is determined that the density of the anodized film on the aluminum-based copper-clad laminate meets the requirements. If the scratch depth exceeds the set threshold, it is determined that the density of this batch of aluminum-based copper-clad laminate does not meet the requirements.

[0034] Preferably, the data processing in step five specifically includes:

[0035] The control panel performs median filtering and outlier removal on the raw contour data output by the ultra-high-speed contour measuring instrument to eliminate false height signals caused by surface dust and oil.

[0036] The surface height of the unscratched areas on both sides of the scratch in each frame of contour data is extracted in real time. The local reference plane at that position is fitted by the least squares method. The scratch depression area in each frame of contour data is automatically identified. The height difference between the lowest point of the depression and the reference plane is calculated to obtain the scratch depth at that position.

[0037] Based on the height difference between the local reference plane and the initial reference plane at this location, the actual contact force deviation caused by the warping of the plate surface is calculated, and the original scratch depth is corrected for the first time.

[0038] Extract the deposition rate parameter of the scratch cross section, back-calculate the surface friction coefficient of the oxide film, calculate the actual contact force deviation introduced by the lateral friction force, and make a second correction to the scratch depth after the first correction.

[0039] It records all scratch depth data in real time throughout the entire swiping process and automatically extracts the maximum scratch depth value as the basis for density determination.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] (1) This device is the first to establish a correction system for the unique systematic errors of two scenarios: inherent warpage of aluminum-based copper-clad laminate and lateral friction of cantilever pen. It fills the error correction gap in the detection of anodized film on bimetallic plates, eliminates specific interference, and greatly improves the detection accuracy. This device can simultaneously acquire the data required for two types of correction: plate height reference and scratch accumulation morphology, using only a single line laser profilometer. Traditional grating rulers and point lasers cannot achieve this due to the limitations of the detection principle. No additional sensors are required. This device can complete full trajectory scanning, data processing and density determination with a single sensor, which greatly reduces the number of parts and assembly processes, reduces costs and failure points, and improves the long-term operational stability of the device.

[0042] (2) The ultra-high speed linear laser profile measuring instrument of this device emits a linear laser beam that can completely cover the entire trajectories of the detection pen. It does not require micron-level precise alignment like a point laser sensor, nor does it require complex parallelism adjustment like a grating ruler. Ordinary operators can complete the installation and debugging of the device after simple training, which greatly reduces the requirements for the professional skills of the operators.

[0043] (3) This device directly measures the actual height difference of the oxide film surface to calculate the scratch depth, rather than indirectly converting it through mechanical displacement. This fundamentally eliminates the measurement error caused by factors such as mechanical fit clearance, installation stress, and spring deformation. At the same time, it can continuously scan the entire scratch trajectory and record the depth change of each scratch. It can accurately capture local deep scratches, micro scratches and defect points on the trajectory, effectively avoiding the omission of defective products.

[0044] (4) This device uses a rack and pinion transmission mechanism to convert the linear compression of the compression spring into the rotation angle of the pointer. The pressure scale and the spring compression are in strict linear correspondence, and the pressure display accuracy is high. At the same time, it is equipped with an automatic brake locking mechanism, which can automatically lock the rack position during the detection process to prevent unexpected pressure fluctuations and ensure the consistency of detection results for different batches and different operators.

[0045] (5) The entire process of this device, from sample clamping and pressure adjustment to data processing and result determination, is simple and convenient to operate. Data preprocessing, scratch depth calculation, feature value extraction and density determination are all completed automatically by the control panel. There is no need for manual complex calculation and judgment, which greatly improves the detection efficiency and is suitable for batch sampling needs on industrial production lines. Attached Figure Description

[0046] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0047] In the attached diagram:

[0048] Figure 1 This is a schematic diagram of the overall device;

[0049] Figure 2 This is a schematic diagram of the overall back of the device;

[0050] Figure 3 This is a schematic diagram of the bottom of the entire device;

[0051] Figure 4 This is a schematic diagram of the bottom of the support frame for this device;

[0052] Figure 5 This is a schematic diagram of the top of the support frame for this device;

[0053] Figure 6 This is a schematic diagram of the interior of the lifting rail of this device;

[0054] Figure 7 This is a cross-sectional view of the positioning tube of the detection pen in this device;

[0055] Figure 8 This is a schematic diagram of the interior of the horizontal moving rail of this device;

[0056] Figure 9 This is a cross-sectional schematic diagram of the pressure chamber of this device;

[0057] Figure 10 This is a schematic diagram of the interior of the pressure chamber of this device;

[0058] Figure 11 This is a schematic cross-sectional view of the gears in this device;

[0059] Figure 12 This is a schematic diagram of the outer side of the support tube of this device;

[0060] Figure 13 This is a schematic diagram of the inner side of the positioning rod of this device;

[0061] Figure 14 This is a schematic diagram of the outside of the reset plate of this device.

[0062] In the diagram: 1-Support; 2-Bracket; 3-Horizontal moving rail; 4-Lifting rail; 5-Pressure chamber; 6-Pressure gauge; 7-Force measuring column; 8-Support block; 9-Zeroing button; 101-Anti-slip block; 102-Positioning strip; 103-Positioning strip bolt; 104-Connecting groove; 201-Fixing block; 202-Fixing bolt; 203-Removal bolt; 301-Horizontal moving screw; 302-Horizontal moving slider; 303-Horizontal moving handle; 401-Lifting handle; 402-Lifting screw; 403-Lifting slider; 501-Support frame; 502-Positioning tube; 503-Gear; 504-Rack; 505-Connecting... 506-Fixing bar; 507-Slider; 508-Groove; 601-Pointer shaft; 602-Scale plate; 603-Pointer; 701-Removal rod; 702-Detection pen; 703-Detection pen positioning bolt; 704-Vibration damping pad; 705-Support tube; 706-Compression force measuring spring; 707-Detection pen positioning tube; 708-Detection pen positioning hole; 801-Ultra-high speed profile measuring instrument; 802-Control panel; 803-Rechargeable battery; 901-Brake tube; 902-Support plate; 903-Reset plate; 904-Positioning rod; 905-Reset spring; 906-Reset rod; 907-Brake strip. Detailed Implementation

[0063] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0064] Example 1, by Figures 1-14The present invention discloses a density detection device for anodized film on an aluminum-based copper clad laminate, comprising a support mechanism, a moving mechanism at the top of the support mechanism, a pressure applying mechanism at the end of the moving mechanism, a measuring mechanism inside the pressure applying mechanism, and a detection mechanism at one end of the side wall of the pressure applying mechanism; the support mechanism includes a bracket 2, the end of the bracket 2 being detachably connected to a horizontal moving rail 3 of the moving mechanism, the end of the horizontal moving rail 3 being tightly fitted with a lifting rail 4; the end of the lifting rail 4 being detachably connected to a pressure chamber 5 of the pressure applying mechanism, a disassembly rod 701 being slidably connected inside the pressure chamber 5, a detection pen 702 being provided at the lower end of the disassembly rod 701, the detection pen 702 being made of hard alloy material with a hardness ≥ HRA90 and a tip diameter of 0.5mm, and a support tube 705 being fixed to the top of the disassembly rod 701; a pointer shaft 601 is hinged to the pressure chamber 5, the pointer shaft 601 being fixedly connected to a gear 503 of the measuring mechanism, the gear 503 being meshed with a rack 504, the rack... The inner side of strip 504 is fixedly connected to the support tube 705 by a fixing strip 506; the detection mechanism includes an ultra-high-speed profile measuring instrument 801, the top of which is equipped with a control panel 802. The ultra-high-speed profile measuring instrument 801 emits a linear laser beam perpendicular to the swiping direction of the detection pen 702, with a laser line width of 5mm, completely covering the scratch trajectory of the detection pen 702, ensuring that when the detection pen 702 swipes forward, the ultra-high-speed profile measuring instrument 801 can immediately scan the freshly formed scratch, and the detection pen body will not obstruct the laser beam. The ultra-high-speed profile measuring instrument 801, which is fixed to the bottom of the support block 8, scans the scratch contour data of the detection pen 702 on the anodized film on the surface of the aluminum-based copper-clad laminate in real time, and transmits the scan data to the control panel 802 in real time. The control panel 802 processes the received contour data to obtain the scratch depth, and determines the density of the anodized film on the aluminum-based copper-clad laminate based on the scratch depth.

[0065] In this embodiment, relying solely on the height difference and scratch cross-sectional morphology data simultaneously acquired by a line laser, dynamic correction of both board warping and lateral friction errors—achievable only by existing technologies—can be accomplished. The support mechanism supports the entire device, the moving mechanism moves the detection pen 702, and the pressure applying mechanism applies pressure to the aluminum-based copper-clad laminate to ensure the pressure exerted by the detection pen 702 on the surface of the aluminum-based copper-clad laminate meets requirements. The measuring mechanism measures the pressure on the detection pen 702, the detection mechanism detects scratches, the bracket 2 supports the horizontal moving rail 3, the lifting rail 4 positions the support frame 501, and the disassembly rod 70... 1. The positioning tube 707 of the detection pen is used to position the detection pen positioning tube 707. The support tube 705 is used to position the disassembly rod 701. The detection pen 702 is used to scratch the surface of the aluminum-based copper-clad laminate. The pointer shaft 601 is used to position the pointer 603. The rack 504 can drive the gear 503 to rotate by lifting and lowering, thereby driving the pointer 603 to rotate. The ultra-high-speed profile measuring instrument 801 and the control panel 802 are connected by a signal. The ultra-high-speed profile measuring instrument 801 is installed behind the detection pen 702 to ensure that the ultra-high-speed profile measuring instrument 801 can scan the depth of the scratch. At the same time, the detection pen 702 can only move forward during detection.

[0066] Furthermore, the support mechanism also includes a support 1, the bottom of which is detachably connected to several anti-slip blocks 101, and the support 1 is provided with a connecting groove 104; the support 1 and the bracket 2 are detachably connected by disassembly bolts 203; the top of the support 1 is detachably connected to a positioning strip 102 by several positioning strip bolts 103; a fixing block 201 is fixed to the top of the bracket 2, and the fixing block 201 is detachably connected to the horizontal moving rail 3 by fixing bolts 202; a horizontal moving slider 302 is slidably connected inside the horizontal moving rail 3. The horizontal moving rail 3 is internally hinged with a horizontal moving screw 301, which is engaged with the horizontal moving slider 302. A horizontal moving handle 303 is fixed to one end of the horizontal moving screw 301. A lifting slider 403 is fixed to the end of the horizontal moving slider 302, which is slidably connected to the lifting rail 4. A lifting screw 402 is internally hinged to the lifting rail 4, which is engaged with the lifting slider 403. A lifting handle 401 is fixed to the top of the lifting screw 402.

[0067] In this embodiment, the support 1 is used to support the bracket 2, the anti-slip block 101 can prevent the support 1 from sliding and ensure the stability of the support 1, the connecting groove 104 is used to position the bracket 2, the positioning strip 102 is used to position the aluminum-based copper-clad laminate, the rotation of the horizontal moving handle 303 can drive the horizontal moving screw 301 to rotate, thereby driving the horizontal moving slider 302 to move, thereby driving the lifting slider 403 to move horizontally, and the rotation of the lifting handle 401 can drive the lifting screw 402 to rotate, thereby driving the lifting rail 4 to rise and fall;

[0068] In use, the entire device is installed. The bracket 2 is fixed by the disassembly bolt 203, the fixing block 201 is fixed to the horizontal moving rail 3 by the fixing bolt 202, and the positioning strip 102 is fixed on the top of the support 1 by the positioning strip bolt 103. The detection pen 702 is installed inside the detection pen positioning tube 707 by the detection pen positioning bolt 703. The support block 8 is fixed by bolts, and a self-test is performed. The self-test includes: laser line alignment check of the ultra-high speed contour measuring instrument 801, zeroing check of the pointer 603, and communication check of the control panel 802. If all items are normal, the self-test is passed. The aluminum-based copper-clad laminate is placed on the top of the support 1 and abuts against the side wall of the positioning strip 102. The aluminum-based copper-clad laminate is pressed and fixed to the surface of the support 1 by two M3 pressure plate bolts.

[0069] Furthermore, a compression force-measuring spring 706 is fixed to the top of the support tube 705, and the top of the compression force-measuring spring 706 is fixedly connected to the inner top wall of the pressure chamber 5. A force-measuring column 7 is fixed to the top of the support tube 705, and the force-measuring column 7 is slidably connected to the pressure chamber 5. A vibration damping pad 704 is also fixed inside the pressure chamber 5. A detection pen positioning tube 707 is fixed to the bottom of the disassembly rod 701. The detection pen positioning tube 707 is slidably connected to the detection pen 702. The detection pen 702 is provided with a detection pen positioning hole 708, and the detection pen positioning bolt 703 passes through the detection pen positioning hole 708 and the detection pen positioning tube. The lifting rail 4 has a through hole; a support frame 501 is detachably connected to the end of the lifting rail 4, and the support frame 501 is detachably connected to the pressure chamber 5. A pressure gauge 6 is detachably connected to the end of the pressure chamber 5; a positioning tube 502 is fixed inside the pressure chamber 5, and a slider 507 is fixed inside the positioning tube 502. The slider 507 is slidably connected to the groove 508 inside the gear 503; a pointer 603 is fixed to the outside of the pointer shaft 601; the linear compression of the compression spring 706 is converted into the rotation angle of the pointer 603 through the gear 503; the scale 602 is provided with pressure graduations. The force scale and the rotation angle of the pointer 603 have a linear one-to-one correspondence; a positioning rod 904 is fixed to one side of the rack 504 via a connecting strip 505, a brake strip 907 is fixed to the inner wall of the positioning rod 904, a brake tube 901 is tightly fitted inside the brake strip 907, a zeroing button 9 is fixed to the outer side of the brake tube 901, and the zeroing button 9 is slidably connected to the pressure chamber 5; a support plate 902 is fixed to the inner side of the brake tube 901, a reset rod 906 is fixed to the inner side of the support plate 902, a reset plate 903 is slidably connected to the outer side of the reset rod 906, and the reset plate 903 is fixedly connected to the pressure chamber 5. The support plate 902 is also fixed with a return spring 905. The other end of the return spring 905 is fixedly connected to the return plate 903. During the test, the return spring 905 pushes the brake tube 901 to press the brake strip 907 and locks the position of the rack 504 to prevent pressure fluctuations. The support block 8 is detachably connected to the side wall of the support frame 501 by bolts. The support block 8 is fixedly connected to the ultra-high-speed profile measuring instrument 801 at its bottom and to the control panel 802 at its top. One end of the ultra-high-speed profile measuring instrument 801 is provided with a rechargeable battery 803, which is fixedly connected to the support block 8.

[0070] In this embodiment, the compression-type force-measuring spring 706 is elastic, the vibration damping pad 704 is made of rubber material, and the vibration damping pad 704 dampens the support tube 705. The detection pen positioning tube 707 is used to position the detection pen 702, the support frame 501 is used to position the pressure chamber 5, the pressure gauge 6 conveniently displays the pressure of the detection pen 702, and the positioning tube 502 is used to position the gear 503. The elastic force and compression of the compression-type force-measuring spring 706 satisfy Hooke's Law F=kx, where F is the applied pressure, k is the spring constant, k=25N / mm, and x is the compression of the spring. According to Hooke's Law F=kx, every 0.04mm of spring compression corresponds to 1N of pressure, and a full-scale range of 50N corresponds to a total spring compression of 2mm. The compression of the compression-type force-measuring spring 706 is converted into the rotational deflection of the pointer 603 through the gear 503 and the rack 504. The total transmission ratio of the gear 503 and the rack 504 is 135:1, meaning that for every 1mm compression of the compression spring 706, the pointer rotates 135°. Therefore, when the spring is compressed by 2mm, the pointer rotates 270°, which perfectly covers the entire scale range of 0-50N on the dial. The reset rod 906 and the reset plate 903 cooperate to ensure the stability of the zeroing button 9. The brake strip 907 has an arc-shaped structure, and the brake tube 901 has an arc-shaped structure. The brake tube 901 is in close contact with the brake strip 907. Both the brake tube 901 and the brake strip 907 are made of rubber material, which serves as a brake and facilitates the movement of the zeroing button 9. The reset spring 905 is elastic, so that the zeroing button 9 moves away from the reset plate 903 when no force is applied. The rechargeable battery 803 provides power to the ultra-high-speed profile measuring instrument 801 and the control panel 802.

[0071] When testing is required, press the zeroing button 9 to move the brake tube 901 inward. Due to the action of the compression spring 706, the support tube 705 descends. The damping pad 704 dampens the vibration of the support tube 705. As the support tube 705 descends, the rack 504 follows, causing the gear 503 to rotate, which in turn rotates the pointer 603, completing the zeroing process. Release the zeroing button 9; to 0.The lifting handle 401 is slowly rotated with an accuracy of 5 N / step, causing the lifting screw 402 to rotate. At this time, because the height of the lifting slider 403 is fixed, the lifting rail 4 descends, causing the pressure chamber 5 to descend until the detection pen 702 is in close contact with the anodized layer surface of the aluminum-based copper-clad laminate. The lifting handle 401 is then finely adjusted, causing the support tube 705 to rise, which in turn causes the compression spring 706 to compress and deform. Simultaneously, the rack 504 rises, which in turn causes the gear 503 to rotate, causing the pointer 603 to rotate around the axis of the pointer shaft 601. At this time, the gear 503 converts the linear compression of the compression spring 706 into the rotation of the pointer 603. The rotation angle of the pointer 603 corresponds to the pressure scale value indicated on the scale 602, thereby obtaining the pressure value of the detection pen 702. When the required measurement pressure value is met, the rotation of the lifting handle 401 is stopped; the operation of the ultra-high-speed profile measuring instrument 801 and the control panel 802 is controlled, and the horizontal moving handle 303 is rotated. Due to several M3 pressure plate bolts, the aluminum-based copper-clad laminate is prevented from moving. The rotation of the horizontal moving handle 303 can drive the horizontal moving screw 301 to rotate, which in turn drives the horizontal moving slider 302 to move, causing the lifting rail 4 to move, which in turn drives the pressure chamber 5 to move synchronously, causing the disassembly rod 701 to move synchronously, thus enabling the... The detection pen 702 moves on the anodized film surface of the aluminum-based copper-clad laminate; the support block 8 moves along with the pressure chamber 5; the ultra-high-speed profile measuring instrument 801 scans the surface of the aluminum-based copper-clad laminate in real time at a frame rate of ≥1000 frames / second and transmits the scanned data to the control panel 802; the control panel 802 processes the data; before the detection begins, the control panel 802 first collects 3 frames of original surface data of the unscratched area, fits a reference plane using the least squares method and sets it as the height zero point; the control panel 802 performs median filtering and outlier removal on the original profile data output by the ultra-high-speed profile measuring instrument 801 to eliminate false height signals caused by surface dust and oil; automatic identification... The device identifies scratch and depression areas in each frame of contour data, calculates the height difference between the lowest point of the depression and the reference plane, and obtains the scratch depth at that location. It records all scratch depth data in real time throughout the entire scraping process, automatically extracts the maximum scratch depth value, and uses it as the basis for density determination. If the ultra-high-speed contour measuring instrument 801 does not detect scratches or the scratch depth is ≤3μm, it is determined that the density of the anodized film on the aluminum-based copper clad laminate meets the requirements. If the scratch depth is >3μm, it is determined that the density of this batch of aluminum-based copper clad laminate does not meet the requirements. Comparative experiments verify that this device has a detection accuracy of ±0.2μm, a false negative rate of <0.5%, and a false positive rate of <1%, which is 10 times more accurate and 50% more efficient than the traditional grating ruler method.

[0072] In this embodiment, the aluminum-based copper clad laminate has an inherent difference in the coefficient of thermal expansion between the aluminum layer and the copper layer (aluminum approximately 23×). / ℃, copper approximately 17× During the anodizing process (at / ℃), a non-negligible warping deformation occurs on the board surface. This warping deformation causes a continuous change in the actual height of the board surface relative to the detection pen during the rubbing process, thereby altering the actual compression of the compression spring 706 and causing the actual contact force acting on the oxide film surface to deviate from the set value. Therefore, the control panel 802 performs the following board warping force deviation correction processing:

[0073] Real-time calibration of the reference plane: Before the detection begins, the ultra-high-speed profile measuring instrument 801 first collects three frames of original surface data of the unscratched area, fits the reference plane using the least squares method and sets it as the height zero point; during the detection process, the surface height of the unscratched area 2mm on the left and right sides of the scratch in each frame of profile data is extracted in real time, and the local reference plane at this position is fitted using the least squares method to eliminate the height reference deviation caused by the warping of the plate surface.

[0074] Data preprocessing: For each frame of contour data acquired in real time, a 5×5 window median filtering algorithm is used to eliminate impulse noise, and outlier false height signals caused by surface dust and oil are removed according to the 3σ criterion.

[0075] Automatic scratch region identification: For the preprocessed contour data, the scratch region segmentation is performed using a fixed height threshold method. Since the height value of the scratch region is significantly lower than the reference plane, the height threshold is set to -1μm. Pixels that are continuously lower than this threshold are marked as potential scratch regions. The area of ​​each region is calculated, and noise regions with an area of ​​less than 50 pixels are removed to obtain the final scratch depression region.

[0076] Original scratch depth calculation: Calculate the minimum height value of all pixels within each scratch depression area; this is the scratch depth at that location. ;

[0077] Correction for warping force deviation of the plate: Calculate the height difference Δz between the local reference plane and the initial reference plane at this location, according to the formula:

[0078]

[0079] Calculate the actual contact force In the formula: To account only for the equivalent contact force resulting from the change in spring compression due to plate warping deformation, To set the pressure value (N), k is the spring constant of the compression spring, k = 25 N / mm. Then, based on the linear relationship between scratch depth and contact force, the original scratch depth is corrected to obtain the first corrected scratch depth. :

[0080]

[0081] The original scratch depth is corrected first to obtain the first corrected scratch depth. If |Δz| > 0.5mm for a certain frame, then the frame is marked as an invalid frame and will not be included in subsequent judgments.

[0082] In the formula: To set the pressure value, k is the spring constant of the compression spring.

[0083] Lateral friction deviation correction: Extract the material buildup height on both sides of the groove in the cross-sectional profile of the scratch, calculate the buildup ratio η (the ratio of buildup volume to groove volume), and then apply the pre-calibrated relationship between the buildup ratio and the friction coefficient of the oxide film surface. Back-calculation of the surface friction coefficient of the oxide film According to the formula:

[0084]

[0085] calculate Then, according to the formula:

[0086]

[0087] In the formula, The equivalent contact force is calculated by only taking into account the lever effect of the friction between the guide pair and the lateral friction force on the oxide film surface; To guide the friction coefficient of the pair; The coefficient of friction of the oxide film surface. To detect the length of the pen cantilever; To detect the axial guide length of the pen positioning tube; Set the initial pressure value;

[0088] The first corrected scratch depth is then corrected a second time to obtain the second corrected scratch depth. ,

[0089] guide pair friction coefficient The following specifications were determined: the disassembly rod is made of 304 stainless steel, and the positioning tube of the detection pen is made of aluminum bronze QAl9-4. Both mating surfaces are ground and polished, with a surface roughness Ra≤0.8μm. In this embodiment... The value of 0.15 is the measured value of the material pairing under low-speed dry friction conditions. It is obtained by repeating the test 10 times under the same contact pressure using a ring block friction and wear tester and taking the average value. It is applicable to the scratching conditions of this device. The cantilever length from the pen tip to the lower end of the detection pen positioning tube is taken as 8mm in this embodiment; To measure the axial guide length of the pen positioning tube, a value of 15mm is used in this embodiment;

[0090] It should be noted that the specific formulas and calibration coefficients for calculating the lateral friction force deviation based on the accumulation ratio are preferred solutions obtained under specific scratching conditions using a 304 stainless steel and aluminum bronze QAl9-4 friction pair in this embodiment. For those skilled in the art, when changing the material of the testing pen, coating, friction pair mating method, or scratching speed, multiple sets of calibration experiments can be repeated under the same conditions to obtain a new accumulation ratio-friction coefficient mapping relationship or correction function. This allows the lateral friction force deviation correction method to be applied to different conditions without creative effort. Therefore, any technical solution that uses a line laser profilometer to obtain the cross-sectional morphology of the scratch and uses the accumulation characteristics to infer the influence of lateral friction force to correct the scratch depth should fall within the protection scope of this invention.

[0091] Explanation of the pile ratio-friction coefficient calibration relationship: The above general quadratic polynomial relationship is applicable to the scratch detection scenario of anodized film on aluminum-copper composite plates. Where... , , Three sets of fitting coefficients are to be calibrated. The calibration process is as follows: Select multiple sets of aluminum-copper composite plate samples with different anodizing processes and film thicknesses. Under uniform environmental conditions of temperature, humidity, scratching speed, and applied load, measure the standard friction coefficient and corresponding scratch accumulation rate of each set of samples. Fit the multiple sets of measured data using the least squares method to obtain the coefficients suitable for the current working conditions. , , Specific values; the coefficients obtained from each fitting only correspond to the packing rate range used in this calibration. When the packing rate of the test sample exceeds the calibration range, the above calibration process can be repeated to refit the coefficients.

[0092] Density determination: Real-time recording of all second-corrected scratch depth data throughout the entire scratching process, and automatic extraction of the maximum scratch depth value. .like ≤3μm, indicating that the density of the anodized film on the aluminum-based copper clad laminate meets the requirements; if The thickness is >3μm, indicating that the density of the anodic oxide film on this batch of aluminum-based copper-clad laminates does not meet the requirements.

[0093] This embodiment provides a method for detecting the density of anodized film on an aluminum-based copper clad laminate, based on the aforementioned device for detecting the density of anodized film on an aluminum-based copper clad laminate, including the following steps:

[0094] Step 1: Install the entire device. Fix bracket 2 by removing bolt 203, fix block 201 to horizontal moving rail 3 by fixing bolt 202, fix positioning strip 102 on top of support 1 by positioning strip bolt 103, install detection pen 702 inside detection pen positioning tube 707 by detection pen positioning bolt 703, fix support block 8 by bolt and perform self-inspection, place aluminum-based copper-clad plate on top of support 1 and abut against the side wall of positioning strip 102, and press and fix aluminum-based copper-clad plate to the surface of support 1 by two M3 pressure plate bolts;

[0095] Step 2: Press the zeroing button 9 to move the brake tube 901 inward. Due to the action of the compression spring 706, the support tube 705 descends. Due to the action of the damping pad 704, the support tube 705 is damped. When the support tube 705 descends, the rack 504 descends as well, causing the gear 503 to rotate, which drives the pointer 603 to rotate, completing the zeroing. Release the zeroing button 9.

[0096] Step 3: Rotate the lifting handle 401 as required, causing the lifting screw 402 to rotate. At this time, since the height of the lifting slider 403 is fixed, the lifting rail 4 descends, causing the pressure chamber 5 to descend until the detection pen 702 is in close contact with the surface of the anodized layer of the aluminum-based copper-clad laminate. Continue to fine-tune the lifting handle 401, causing the support tube 705 to rise, which in turn causes the compression spring 706 to compress and deform, and at the same time causes the rack 504 to rise, which in turn causes the gear 503 to rotate, causing the pointer 603 to rotate around the axis of the pointer shaft 601. At this time, the gear 503 converts the linear compression of the compression spring 706 into the rotation angle of the pointer 603. The rotation angle of the pointer 603 corresponds to the pressure scale value on the indicator dial 602, thus obtaining the pressure value of the detection pen 702. When the required measurement pressure value is met, stop rotating the lifting handle 401.

[0097] Step 4: Control the operation of the ultra-high speed profile measuring instrument 801 and control panel 802. Rotate the horizontal movement handle 303. Due to several M3 pressure plate bolts, the aluminum-based copper-clad laminate is prevented from moving. The rotation of the horizontal movement handle 303 can drive the horizontal movement screw 301 to rotate, which in turn drives the horizontal movement slider 302 to move, causing the lifting rail 4 to move, which in turn drives the pressure chamber 5 to move synchronously, causing the disassembly rod 701 to move synchronously, and causing the detection pen 702 to move on the surface of the anodized film of the aluminum-based copper-clad laminate.

[0098] Step 5: When the pressure chamber 5 moves, the support block 8 moves accordingly. The ultra-high-speed profile measuring instrument 801 scans the surface of the aluminum-based copper-clad laminate in real time and transmits the scanned data to the control panel 802. The control panel 802 performs real-time correction of the reference plane, correction of board warping force deviation, and correction of lateral friction force deviation on the data. If the ultra-high-speed profile measuring instrument 801 does not detect scratches or the scratch depth is within the set threshold range, it is determined that the density of the anodized film on the aluminum-based copper-clad laminate meets the requirements. If the scratch depth exceeds the set threshold, it is determined that the density of this batch of aluminum-based copper-clad laminate does not meet the requirements.

[0099] The data processing in step five specifically includes:

[0100] The control panel 802 performs median filtering and outlier removal on the raw contour data output by the ultra-high-speed contour measuring instrument 801 to eliminate false height signals caused by surface dust and oil.

[0101] The surface height of the unscratched areas on both sides of the scratch in each frame of contour data is extracted in real time. The local reference plane at that position is fitted by the least squares method. The scratch depression area in each frame of contour data is automatically identified. The height difference between the lowest point of the depression and the reference plane is calculated to obtain the scratch depth at that position.

[0102] Based on the height difference between the local reference plane and the initial reference plane at this location, the actual contact force deviation caused by the warping of the plate surface is calculated, and the original scratch depth is corrected for the first time.

[0103] Extract the deposition rate parameter of the scratch cross section, back-calculate the surface friction coefficient of the oxide film, calculate the actual contact force deviation introduced by the lateral friction force, and make a second correction to the scratch depth after the first correction.

[0104] It records all scratch depth data in real time throughout the entire swiping process and automatically extracts the maximum scratch depth value as the basis for density determination.

[0105] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the density of anodized film on aluminum-based copper clad laminates, characterized in that: The support mechanism includes a moving mechanism at its top, a pressure applying mechanism at its end, a measuring mechanism inside the pressure applying mechanism, and a detection mechanism at one end of the side wall of the pressure applying mechanism. The support mechanism includes a bracket (2), the end of which is detachably connected to the horizontal moving rail (3) of the moving mechanism, and the end of the horizontal moving rail (3) is tightly fitted with a lifting rail (4). The end of the lifting rail (4) is detachably connected to the pressure chamber (5) of the pressure applying mechanism. A disassembly rod (701) is slidably connected inside the pressure chamber (5). A detection pen (702) is provided at the lower end of the disassembly rod (701). A support tube (705) is fixed at the top of the disassembly rod (701). A pointer shaft (601) is hinged to the pressure chamber (5). The pointer shaft (601) is fixedly connected to the gear (503) of the measuring mechanism. The gear (503) is meshed with a rack (504). The inner side of the rack (504) is fixedly connected to the support tube (705) through a fixing strip (506). The detection mechanism includes an ultra-high-speed profile measuring instrument (801), and the ultra-high-speed profile measuring instrument (801) is equipped with a control panel (802) on its top. The ultra-high-speed profile measuring instrument (801) scans the scratch profile data of the anodic oxide film on the surface of the aluminum-based copper-clad laminate by the detection pen (702) in real time, and transmits the scan data to the control panel (802) in real time. The control panel (802) processes the received profile data to obtain the scratch depth, and determines the density of the anodic oxide film on the aluminum-based copper-clad laminate based on the scratch depth. The control panel (802) performs real-time correction of the reference plane, correction of board surface warping force deviation, and correction of lateral friction force deviation on the data, specifically including: The control panel (802) performs median filtering and outlier removal on the raw contour data output by the ultra-high speed contour measuring instrument (801) to eliminate false height signals caused by surface dust and oil. The surface height of the unscratched areas on both sides of the scratch in each frame of contour data is extracted in real time. The local reference plane at that position is fitted by the least squares method. The scratch depression area in each frame of contour data is automatically identified. The height difference between the lowest point of the depression and the reference plane is calculated to obtain the scratch depth at that position. Based on the height difference between the local reference plane and the initial reference plane at this location, the actual contact force deviation caused by the warping of the plate surface is calculated, and the original scratch depth is corrected for the first time. Extract the deposition rate parameter of the scratch cross section, back-calculate the surface friction coefficient of the oxide film, calculate the actual contact force deviation introduced by the lateral friction force, and make a second correction to the scratch depth after the first correction. It records all scratch depth data in real time throughout the entire swiping process and automatically extracts the maximum scratch depth value as the basis for density determination.

2. The density detection device for anodized film on aluminum-based copper clad laminate according to claim 1, characterized in that: A compression force measuring spring (706) is fixed to the top of the support tube (705). The top of the compression force measuring spring (706) is fixedly connected to the inner top wall of the pressure chamber (5). A force measuring column (7) is fixed to the top of the support tube (705). The force measuring column (7) is slidably connected to the pressure chamber (5). A vibration damping pad (704) is also fixed inside the pressure chamber (5). A detection pen positioning tube (707) is fixed to the bottom of the disassembly rod (701). The detection pen positioning tube (707) is slidably connected to the detection pen (702). The detection pen (702) is provided with a detection pen positioning hole (708). The detection pen positioning bolt (703) passes through the detection pen positioning hole (708) and the through hole on the detection pen positioning tube (707).

3. The density detection device for anodized film on aluminum-based copper clad laminate according to claim 2, characterized in that: The lifting rail (4) is detachably connected to a support frame (501) at its end. The support frame (501) is detachably connected to the pressure chamber (5). The pressure chamber (5) is detachably connected to a pressure gauge (6) at its end. The pressure chamber (5) is fixed with a positioning tube (502), and a slider (507) is fixed inside the positioning tube (502). The slider (507) is slidably connected to the groove (508) inside the gear (503). A pointer (603) is fixed to the outside of the pointer axis (601); The linear compression of the compression spring (706) is converted into the rotation angle of the pointer (603) by the gear (503). The scale (602) is provided with pressure scale, and the pressure scale and the rotation angle of the pointer (603) are in a linear one-to-one correspondence.

4. The density detection device for anodized film on aluminum-based copper clad laminate according to claim 3, characterized in that: A positioning rod (904) is fixed to one side of the rack (504) via a connecting strip (505). A brake strip (907) is fixed to the inner wall of the positioning rod (904). A brake tube (901) is tightly fitted inside the brake strip (907). A zeroing button (9) is fixed to the outside of the brake tube (901). The zeroing button (9) is slidably connected to the pressure chamber (5). A support plate (902) is fixed inside the brake pipe (901), a reset rod (906) is fixed inside the support plate (902), a reset plate (903) is slidably connected to the outside of the reset rod (906), and the reset plate (903) is fixedly connected to the pressure chamber (5). A reset spring (905) is also fixed inside the support plate (902), and the other end of the reset spring (905) is fixedly connected to the reset plate (903).

5. The density detection device for anodized film on aluminum-based copper clad laminate according to claim 4, characterized in that: A support block (8) is detachably connected to the side wall of the support frame (501) by bolts. The support block (8) is fixedly connected to the ultra-high speed profile measuring instrument (801) at its bottom and to the control panel (802) at its top. One end of the ultra-high speed profile measuring instrument (801) is provided with a rechargeable battery (803) which is fixedly connected to the support block (8).

6. The density detection device for anodized film on aluminum-based copper clad laminate according to claim 1, characterized in that: The support mechanism also includes a support (1), and a number of anti-slip blocks (101) are detachably connected to the bottom of the support (1). The support (1) is provided with a connecting groove (104). The support (1) and the bracket (2) are detachably connected by a disassembly bolt (203); The support (1) has a positioning bar (102) detachably connected to its top by several positioning bar bolts (103).

7. The density detection device for anodized film on aluminum-based copper clad laminate according to claim 6, characterized in that: The bracket (2) has a fixing block (201) fixed on top, and the fixing block (201) is detachably connected to the horizontal moving rail (3) by fixing bolts (202); The horizontal moving rail (3) is slidably connected to a horizontal moving slider (302), and the horizontal moving rail (3) is hinged to a horizontal moving screw (301). The horizontal moving screw (301) is engaged with the horizontal moving slider (302), and a horizontal moving handle (303) is fixed at one end of the horizontal moving screw (301).

8. The density detection device for anodized film on aluminum-based copper clad laminate according to claim 7, characterized in that: The horizontal moving slider (302) is fixed with a lifting slider (403) at its end. The lifting slider (403) is slidably connected to the lifting rail (4). The lifting rail (4) is hinged with a lifting screw (402) inside. The lifting screw (402) is engaged with the lifting slider (403). The top of the lifting screw (402) is fixed with a lifting handle (401).

9. A method for detecting the density of anodized film on aluminum-based copper clad laminates, based on the density detection device for anodized film on aluminum-based copper clad laminates according to any one of claims 1-8, characterized in that: Includes the following steps: Step 1: Install the entire device, fix the bracket (2) by removing the bolt (203), fix the fixing block (201) and the horizontal moving rail (3) by fixing the bolt (202), fix the positioning strip (102) on the top of the support (1) by the positioning strip bolt (103), install the detection pen (702) inside the detection pen positioning tube (707) by the detection pen positioning bolt (703), fix the support block (8) by the bolt, and perform self-inspection. Place the aluminum-based copper-clad plate on the top of the support (1) and abut against the side wall of the positioning strip (102), and press and fix the aluminum-based copper-clad plate on the surface of the support (1) by two M3 pressure plate bolts. Step 2: Press the zeroing button (9) to move the brake pipe (901) inward. Due to the action of the compression spring (706), the support pipe (705) descends. Due to the action of the damping pad (704), the support pipe (705) is damped. When the support pipe (705) descends, the rack (504) descends as well, causing the gear (503) to rotate, which drives the pointer (603) to rotate, thus completing the zeroing. Release the zeroing button (9). Step 3: Rotate the lifting handle (401) as required to make the lifting screw (402) rotate. At this time, since the height of the lifting slider (403) is fixed, the lifting rail (4) descends, causing the pressure chamber (5) to descend until the test pen (702) is in close contact with the surface of the anodized layer of the aluminum-based copper-clad board. Continue to fine-tune the lifting handle (401) to make the support tube (705) rise, causing the compression spring (706) to compress and deform, and at the same time causing the rack (504) to rise, thereby causing the gear (503) to rotate, causing the pointer (603) to rotate around the axis of the pointer shaft (601). At this time, the gear (503) converts the linear compression of the compression spring (706) into the rotation angle of the pointer (603). The rotation angle of the pointer (603) corresponds to the pressure scale value on the indicator dial (602), thereby obtaining the pressure value of the test pen (702). When the required measurement pressure value is met, stop rotating the lifting handle (401). Step 4: Control the operation of the ultra-high speed profile measuring instrument (801) and control panel (802), rotate the horizontal movement handle (303), due to several M3 pressure plate bolts, prevent the aluminum-based copper-clad laminate from moving. Since the rotation of the horizontal movement handle (303) can drive the horizontal movement screw (301) to rotate, drive the horizontal movement slider (302) to move, so that the lifting rail (4) moves, drive the pressure chamber (5) to move synchronously, so that the disassembly rod (701) moves synchronously, so that the detection pen (702) moves on the surface of the anodized film of the aluminum-based copper-clad laminate; Step 5: When the pressure chamber (5) moves, the support block (8) moves accordingly. The ultra-high speed profile measuring instrument (801) scans the surface of the aluminum-based copper-clad laminate in real time and transmits the scanned data to the control panel (802). The control panel (802) performs real-time correction of the reference plane, correction of board warping force deviation, and correction of lateral friction force deviation on the data. If the ultra-high speed profile measuring instrument (801) does not detect scratches or the scratch depth is within the set threshold range, it is determined that the density of the anodized film of the aluminum-based copper-clad laminate meets the requirements. If the scratch depth exceeds the set threshold, it is determined that the density of this batch of aluminum-based copper-clad laminate does not meet the requirements.

Images