A copper-clad plate warpage detection device

Abstract

The application discloses a copper-clad plate warping degree detection device, and belongs to the technical field of copper-clad plate detection.The device comprises a platform, a moving mechanism is arranged on the platform, detection parts are arranged on the two sides of the moving mechanism, a plurality of vertical array arranged transfer mechanisms are arranged on the moving mechanism, a storage rack, a first discharge rack and a second discharge rack which are of the same structure are arranged on one side of the moving mechanism, the moving mechanism is used for driving the transfer mechanisms to move linearly, a moving base plate is movably arranged on the moving mechanism, and four vertical rods are installed on the moving base plate.The warping degree of the copper-clad plate is detected through a multilayer double-sided laser detection mode, and the detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of copper clad laminate testing technology, and in particular to a device for testing the warpage of copper clad laminates. Background Technology

[0002] The warpage of a copper-clad laminate (CCL) refers to the deviation of a portion of the CCL from its plane. Significant warpage will affect the machining of router holes of varying depths. For example, in multilayer circuit board manufacturing, blind vias with precise depths need to be machined on the CCL; significant warpage directly impacts the accuracy of the router hole depth. Furthermore, significant warpage will affect the precision of component insertion or surface mount soldering during electronic component placement.

[0003] Common methods for testing the warpage of copper-clad laminates (CCLs) include the suspension test, which obtains the bow or twist value by suspending the laminate. Another method involves placing the CCL on a marble platform and measuring the height of the arch or the height of the warp to determine the warpage. While these methods are scientifically accurate, in actual production, to ensure that each CCL meets factory requirements, it is necessary to measure it. Therefore, the methods described above are clearly unsuitable for testing the warpage of large batches of CCLs. Existing mass production inspection methods employ single-sided laser inspection. During inspection, the copper-clad laminate (CCL) is fed via a conveyor. As the CCL passes the laser emitter, its upper side is parallel to the horizontal light emitted by the laser. If arching occurs, the CCL will block the light emitted by the laser emitter. This obstruction weakens the light intensity received by the receiver on the other side, or even causes the light to disappear. While this method significantly improves inspection efficiency, it requires several steps. First, the CCL needs to be flipped and inspected twice to ensure accuracy. Second, while using a conveyor belt or conveyor wheels to feed the CCL avoids warping during clamping, it can cause vibration during transport, affecting inspection accuracy. Finally, it makes picking the CCL inconvenient. Summary of the Invention

[0004] This invention provides a copper clad laminate warpage detection device to overcome the shortcomings of the prior art, improve the detection effect and accuracy of copper clad laminates, and has strong practicality.

[0005] In order to achieve the objectives of this invention, the following technologies are proposed:

[0006] A copper-clad laminate warpage detection device includes a platform, a moving mechanism on the platform, detection units on both sides of the moving mechanism, a plurality of transfer mechanisms arranged in a vertical array on the moving mechanism, and a storage rack, a first discharge rack and a second discharge rack with the same structure on one side of the moving mechanism.

[0007] The moving mechanism is used to drive the transfer mechanism to move linearly. It has a movable chassis with a movable setting, and four vertical rods are installed on the movable chassis.

[0008] Furthermore, the detection unit includes a pair of fixing bars distributed on both sides of the moving mechanism. The inner wall of the fixing bars is formed with inner bars. Multiple laser emitters are sleeved on one inner bar, and multiple laser receivers are sleeved on the other inner bar. There is a one-to-one correspondence between the laser receivers and the laser emitters, and each laser emitter has two laser emitting heads.

[0009] Furthermore, the transfer mechanism includes multiple fixed blocks fixed to the vertical rod. A pair of fixed plates are fixed to the fixed blocks located at the same height and on the same side. The fixed plates are located at the upper and lower ends of the fixed blocks. Horizontal plates are fixed to the two ends of the fixed plates respectively. The vertical rod passes through the fixed plates. Guide sleeves are fixed to the inner side of the fixed plates. A slide rail is slidably provided between the guide sleeves located on the same side. A first cylinder is fixed to the inner side of the slide rail. A rack is fixed to the movable end of the first cylinder. Multiple guide rods are fixed to the inner side of the rack. The guide rods are movably disposed on the slide rail.

[0010] Gears are provided between each pair of fixed plates for rotation. Gears located in the same vertical direction are fixed on a rotating shaft, and the rotating shafts rotate in opposite directions.

[0011] The inner side of the slide rail is formed with multiple inner extension arms. The inner end of the inner extension arm on the same side is fixed with a concave side piece. One end of the concave side piece is fixed with an end strip. A window is opened on the end strip. A transparent plate is fixed to the outside of the window. The other end of the concave side piece is fixed with an end block. A rectangular frame is welded to the outer end of the end block.

[0012] Multiple guide posts are fixed on the upper and lower sides of the concave side piece. A movable plate is movably provided on the guide post on the same side. An inner extension plate is fixed on the movable plate. A circular sleeve is welded to the inner end of the inner extension plate. A ball bearing is rotatably provided inside the lower end of the circular sleeve.

[0013] Multiple vertical adjustment plates are provided on the outer wall of the moving plate, and a pressure rod is rotatably provided on the inner end of the vertical adjustment plate;

[0014] Multiple pairs of rectangular holes are opened on the vertical surface of the concave side member. A concave top member is movably installed in each pair of rectangular holes. A side constraint plate is fixed to the inner end of the concave top member located on the same side. Two pairs of inclined grooves are opened on the outer end of the concave top member. Each pair of inclined grooves is symmetrical to each other. The outer end of the inclined groove extends inward at an inclination. The two ends of the pressure rod pass through the inclined groove.

[0015] An outward extension rod is connected to the outer wall of the side constraint plate. The outward extension rod passes through the concave side piece. An inner pressure cross arm is connected to the outer end of the outward extension rod on the same side. A second spring is sleeved on the outward extension rod. The inner end of the second spring abuts against the outer wall of the concave side piece. The outer end of the second spring abuts against the inner wall of the inner pressure cross arm. The upper and lower sides of the inner pressure cross arm are formed with L-shaped inner top arms. An inner pressure wheel is rotatably provided at the outer end of the inner top arm. An abutment plate is fixed on the fixed plate. The inner wall of the abutment plate is formed with a slope. The end of the slope facing the gear extends outward at an angle. The inner end of the slope is formed with an L-shaped retaining groove. The outer periphery of the inner pressure wheel abuts against the inner wall of the abutment plate.

[0016] Furthermore, a pair of second bearing seats are provided at the lower end of the rotating shaft. The second bearing seats are fixed on the moving mechanism. A drive seat is installed on the moving chassis. A push-pull motor is installed on the drive seat. A first bevel gear is connected to the output shaft of the push-pull motor. A second bevel gear meshes with one side of the first bevel gear. A third bevel gear meshes with the other side of the first bevel gear. A first drive shaft is fixed on the third bevel gear. A fourth bevel gear is fixed at the other end of the first drive shaft. A fifth bevel gear meshes with the upper side of the fourth bevel gear. The fifth bevel gear is fixed on one of the rotating shafts. A second drive shaft is fixed on the second bevel gear. A sixth bevel gear is fixed at the other end of the second drive shaft. A seventh bevel gear meshes with the lower side of the sixth bevel gear. The seventh bevel gear is fixed on the other rotating shaft.

[0017] Furthermore, a pair of vertical guide grooves are provided on the vertical adjustment plate, and an adjustment screw passes through the vertical guide groove. The inner end of the adjustment screw is connected to the outer wall of the moving plate strip.

[0018] Furthermore, the upper and lower ends of the fixing block are respectively formed with T-shaped limiting members, the side wall of the fixing plate is provided with a pair of U-shaped grooves, the vertical rod passes through the U-shaped grooves, and the side wall of the fixing plate is formed with two pairs of protruding plates, the protruding plates are located on both sides of the U-shaped grooves, and the protruding plates are inserted into the inner side of the limiting members.

[0019] Furthermore, a pair of baffles are fixed to the inner side of the end strip to limit one end of the copper-clad laminate.

[0020] Furthermore, the outer circumference of the inner end of the sleeve has a tapered structure, and the outer diameter of the inner end of the sleeve is smaller than the outer diameter of its outer end.

[0021] Furthermore, an end cap is connected to the upper end of the sleeve, and a first spring is provided inside the sleeve. The outer end of the first spring abuts against the inner wall of the end cap, and a pressure head is provided on the inner end of the first spring. An arc-shaped recess is formed on the inner end of the pressure head, and a ball abuts against the arc-shaped recess of the pressure head.

[0022] Furthermore, the storage rack includes a lower plate, on which a vertical back plate is fixed. Multiple pairs of concave tubes are welded to the vertical back plate, and embedded guide sleeves are welded to the upper and lower sides of the inside of the concave tubes.

[0023] The vertical back plate has multiple sets of vertically arranged waist-shaped holes. The inner side of the vertical back plate is fixed with a limiting vertical bar with an I-shaped structure. Multiple pairs of movable sleeves are fitted on the limiting vertical bar. The other end of the movable sleeve is formed with a clamp. Wing plates are formed on both sides of the movable sleeve. Movable through rods are connected to the wing plates. The movable through rods are inserted into the waist-shaped holes. The other end of every four movable through rods at the same height is connected to an inner moving horizontal plate. A protruding rod is connected to the inner moving horizontal plate.

[0024] A pair of transverse inner columns are welded to the back side of the vertical back plate. A transverse guide hole is opened on the transverse inner column. A pair of movable rods are movably installed in the transverse guide hole. A concave sleeve is fitted on the transverse inner column. The movable rod passes through the concave sleeve. A movable vertical plate is welded between the concave sleeves. Multiple pairs of internal pressure inclined holes are opened on the movable vertical plate. Each pair of internal pressure inclined holes is symmetrical to each other. There is an angle between the length direction of the internal pressure inclined hole and the width direction of the movable vertical plate. A protruding rod and an internal pressure inclined hole are in a one-to-one correspondence. The protruding rod passes through its corresponding internal pressure inclined hole. A connecting protrusion is welded to the movable vertical plate. A second cylinder is fixed on the connecting protrusion. The cylinder body of the second cylinder is fixed to the vertical back plate.

[0025] The advantages of the above technical solution are:

[0026] This invention first uses a multi-layer double-sided laser inspection method to detect the warpage of copper-clad laminates, thereby improving the inspection efficiency.

[0027] Secondly, this invention constrains the copper-clad laminate through point-to-surface contact during testing. This prevents the contact area from being too large and thus corrects for any warping or twisting of the laminate, thereby improving testing accuracy. Furthermore, the constrained contact minimizes damage to the copper layer of the laminate.

[0028] The present invention can ultimately automate the detection of copper clad laminate warpage, that is, realize the automatic feeding and unloading of copper clad laminates, and classify the unloading according to the warpage state of the copper clad laminates. Attached Figure Description

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will now be described in further detail with reference to the accompanying drawings.

[0030] Figure 1 A three-dimensional structural diagram of a copper-clad laminate warpage detection device is shown.

[0031] Figure 2 A three-dimensional structural diagram of the moving mechanism, the detection unit, and the transfer mechanism is shown.

[0032] Figure 3 A three-dimensional structural diagram of the moving mechanism from a first-person perspective is shown.

[0033] Figure 4 A three-dimensional structural diagram of the moving mechanism from a second perspective is shown.

[0034] Figure 5 A three-dimensional structural diagram of the transfer mechanism is shown.

[0035] Figure 6 A three-dimensional structural diagram of the lower part of the transfer mechanism is shown.

[0036] Figure 7 A three-dimensional structural diagram of the upper part of the transfer mechanism is shown.

[0037] Figure 8 A first-view perspective three-dimensional structural diagram of some components in the transfer mechanism is shown.

[0038] Figure 9 A second-view perspective three-dimensional structural diagram of some components in the transfer mechanism is shown.

[0039] Figure 10 The diagram shows a three-dimensional structure of the storage rack from a first-person perspective.

[0040] Figure 11 The diagram shows a two-dimensional structural view of the storage rack from a second perspective.

[0041] Explanation of reference numerals in the attached drawings: Platform 1, Moving mechanism 2, Base 200, End plate 201, Concave cover 202, Moving port 203, Moving motor 204, Moving chassis 205, Vertical rod 206, Top cover 207, Sliding sleeve 208, Guide rail 209, First bearing seat 210, Lead screw 211, Moving seat 212, Detection unit 3, Connecting seat 30, Fixing strip 31, Inner strip 32, Laser emitter 33, Laser receiver 34, Transfer mechanism 4, Rotating shaft 400, Second bearing seat 401, Drive seat 402, Push-pull motor 403, First cone Gear 404, second bevel gear 405, third bevel gear 406, first drive shaft 407, third bearing housing 408, sixth bevel gear 409, seventh bevel gear 410, fourth bevel gear 411, fifth bevel gear 412, fixing plate 413, horizontal plate 414, U-shaped groove 415, protruding plate 416, fixing block 417, limiting member 418, transverse connecting rod 419, guide sleeve 420, gear 421, abutment plate 422, inclined surface 423, retaining groove 424, slide rail 425, rack 426, guide rod 428, first cylinder 429. 430, Inner extension arm; 432, Concave side piece; 433, End strip; 434, Window; 435, Transparent plate; 436, Baffle; 437, End block; 438, Rectangular frame; 439, Guide post; Limiting plate; 440, Moving plate strip; 441, Inner extension plate; 442, Round sleeve; 443, End cap; 444, Concave top piece; 445, Inclined groove; 446, Pressure rod; 447, Vertical adjusting plate; 448, Vertical guide groove; 449, Adjusting screw; 450, Outer extension rod; 451, Inner pressure cross arm; 452, Inner top arm; 453, Wheel axle; 454, Inner pressure wheel; 456, Ball bearing; 457, Side restraint plate; 45 8, second spring 459, second drive shaft 460, storage rack 5, first discharge rack 6, second discharge rack 7, lower plate 500, vertical back plate 501, concave tube 502, embedded guide sleeve 503, limiting vertical bar 504, moving sleeve 505, clamping plate 506, wing plate 507, waist-shaped hole 508, moving through rod 509, transverse guide hole 510, movable rod 511, concave sleeve 512, moving vertical plate 513, inner pressure inclined hole 514, protruding rod 515, inner moving horizontal plate 516, connecting protrusion 517, second cylinder 518, transverse inner column 519. Detailed Implementation

[0042] like Figure 1As shown, a copper clad laminate warpage detection device includes a platform 1, a moving mechanism 2 on the platform 1, detection units 3 on both sides of the moving mechanism 2, a plurality of transfer mechanisms 4 arranged in a vertical array on the moving mechanism 2, and a storage rack 5, a first discharge rack 6 and a second discharge rack 7 with the same structure on one side of the moving mechanism 2. During testing, copper-clad laminates to be tested are stored on the storage rack 5. The moving mechanism 2 moves the transfer mechanism 4 to the storage rack 5, and then the transfer mechanism 4 takes the copper-clad laminate to be tested from the storage rack 5. Then, the copper-clad laminate is driven by the moving mechanism 2 to pass through the detection unit 3, and the warpage of the copper-clad laminate is detected by the detection unit 3. After the detection, the moving mechanism 2 transfers the transfer mechanism 4 to the first discharge rack 6. Then, the transfer mechanism 4 with substandard copper-clad laminates transfers the copper-clad laminates on it to the first discharge rack 6. Finally, the moving mechanism 2 transfers the transfer mechanism 4 to the second discharge rack 7, and pushes the qualified copper-clad laminates to the second discharge rack 7 through the transfer mechanism 4.

[0043] like Figures 1 to 4 As shown, the moving mechanism 2 includes a long strip-shaped base 200 fixed to the platform 1 by bolts. End plates 201 are fixed to both ends of the base 200 along its length by bolts. A pair of parallel guide rails 209 are fixed to the base 200 by bolts. Sliding sleeves 208 are slidably fitted onto the guide rails 209. A movable chassis 205 is fixed to the sliding sleeves 208 by screws. A moving motor 204 is fixed to one of the end plates 201 by screws. A lead screw 2 is connected to the output shaft of the moving motor 204 via a coupling. 11. The two ends of the lead screw 211 are respectively provided with first bearing seats 210. The first bearing seats 210 are installed on the base 200 by screws. The lead screw 211 is connected to the movable seat 212 by screws. The movable seat 212 is installed on the lower side of the movable chassis 205 by screws. The upper end of the end plate 201 is provided with a concave buckle cover 202. The concave buckle cover 202 has a pair of movable openings 203 with the length direction parallel to the length direction of the guide rail 209. Four vertical rods 206 are installed on the movable chassis 205 by screws. The upper cover 207 is installed on the movable chassis 205 by screws.

[0044] like Figure 2 As shown, the detection unit 3 includes a pair of connecting seats 30 that are mounted on the base 200 by screws. A vertically arranged fixing strip 31 is mounted on the connecting seat 30 by screws. The fixing strip 31 is distributed on both sides of the concave buckle cover 202. The inner wall of the fixing strip 31 is formed with an inner strip 32. One inner strip 32 is fitted with a laser emitter 33 arranged in an equally spaced array, and the other inner strip 32 is fitted with a laser receiver 34 arranged in an equally spaced array. The laser receiver 34 and the laser emitter 33 are respectively mounted on the fixing strip 31 by screws.

[0045] like Figure 2 and Figures 5 to 9 As shown, the transfer mechanism 4 includes a pair of vertically arranged rotating shafts 400, which are rotatably mounted on the upper cover 207. A pair of second bearing seats 401 are provided at the lower end of each rotating shaft 400. One second bearing seat 401 is fixed to the upper end of the upper cover 207 by screws, and the other second bearing seat 401 is fixed to the movable chassis 205 by screws. A drive seat 402 is mounted on the movable chassis 205 by screws, and a push-pull motor 403 is mounted on the drive seat 402 by screws. A first bevel gear 404 is connected to the output shaft of the push-pull motor 403. A second bevel gear 405 meshes with one side of the first bevel gear 404, and a third bevel gear 406 with the same size and structure as the second bevel gear 405 meshes with the other side of the first bevel gear 404. A first drive shaft 407 is coaxially fixed to the third bevel gear 406 by a pin, and a fourth bevel gear 411 is coaxially fixed to the other end of the first drive shaft 407 by a pin. The upper side of the fourth bevel gear 411 meshes with the fifth bevel gear 412. The fifth bevel gear 412 is coaxially fixed to one of the rotating shafts 400 by a pin. The second drive shaft 460 is coaxially fixed to the second bevel gear 405 by a pin. The other end of the second drive shaft 460 is coaxially fixed to the sixth bevel gear 409, which has the same size and structure as the fourth bevel gear 411, by a pin. The lower side of the sixth bevel gear 409 meshes with the seventh bevel gear 410, which has the same size and structure as the fifth bevel gear 412. The seventh bevel gear 410 is coaxially fixed to another rotating shaft 400 by a pin. The first drive shaft 407 and the second drive shaft 460 are respectively provided with multiple third bearing seats 408. The third bearing seats 408 are fixed to the movable chassis 205 by screws. In this way, when the push-pull motor 403 drives the first bevel gear 404 to rotate, the two rotating shafts rotate at the same speed but in opposite directions through the transmission of other bevel gears.

[0046] Multiple fixing blocks 417 are fixed along the length of the vertical rod 206 by transverse connecting rods 419 perpendicular to its axial direction. A pair of fixing plates 413 are bolted to the fixing blocks 417 located at the same height and on the same side. The fixing plates 413 are located at the upper and lower ends of the fixing blocks 417. Preferably, T-shaped limiting members 418 are formed at the upper and lower ends of the fixing blocks 417. A pair of U-shaped grooves 415 are provided on the sidewalls of the fixing plates 413, through which the vertical rod 206 passes. Two pairs of protruding plates 416 are formed on the sidewalls of the fixing plates 413, located on both sides of the U-shaped grooves 415 and inserted into the inner side of the limiting members 418. The U-shaped grooves 415 facilitate the fixing of the vertical rod 206, while the protruding plates 416 and the limiting members 418 improve the stability of the fixing between the fixing plates 413 and the vertical rod 206.

[0047] Both ends of the fixed plate 413 are fixed with horizontal plates 414 by screws. There is a gap between each pair of horizontal plates 414 located at the same end for the copper-clad laminate to pass through. The vertical rod 206 passes through the fixed plate 413. The inner side of the fixed plate 413 is fixed with a guide sleeve 420 by screws. A slide rail 425 is slidably provided in the guide sleeve 420. The inner side of the slide rail 425 is fixed with a first cylinder 429 by screws. The movable end of the first cylinder 429 is fixed with a rack 426. One end of the rack 426 extends out of one end of the fixed plate 413. Multiple guide rods 428 are fixed to the inner side of the rack 426 by threads. The guide rods 428 are movably arranged on the slide rail 425. The first cylinder 429 can drive the rack 426 to move, thereby adjusting the position of the transfer mechanism.

[0048] A gear 421 is rotatably provided between each pair of fixed plates 413. The gear 421 is coaxially fixed to the rotating shaft 400 by a pin, and the rotating shaft 400 is rotatably provided on the fourth bearing seat on the fixed plate 413.

[0049] The inner side of the slide rail 425 has multiple inner extension arms 430. The inner end of the inner extension arm 430 on the same side is fixed with a concave side piece 432 by bolts. One end of the concave side piece 432 is fixed with an end strip 433 by screws. Optionally, a pair of baffles 436 are fixed to the inner side of the end strip 433 to limit one end of the copper-clad laminate. A window 434 is opened on the end strip 433. A transparent plate 435 is fixed to the outer side of the window 434. The other end of the concave side piece 432 is fixed with an end block 437 by screws. A rectangular frame 438 is welded to the outer end of the end block 437. The width of the rectangular frame 438 is greater than the thickness of the copper-clad laminate.

[0050] Guide posts 439 are fixed to the upper and lower sides of the concave side member 432 in an equally spaced array along its length by screws. A limit plate 440 is fixed to the outer end of the guide post 439. A movable plate strip 441 is movably provided on the guide post 439 on the same side. An inner extension plate 442 is fixed to the movable plate strip 441 by screws. A circular sleeve 443 is welded to the inner end of the inner extension plate 442. A ball bearing 457 is rotatably provided inside the lower end of the circular sleeve 443. Preferably, the outer periphery of the inner end of the circular sleeve 443 has a conical structure, and the outer diameter of the inner end of the circular sleeve 443 is smaller than the outer diameter of its outer end, so as to avoid the problem of the edge of the inner end of the circular sleeve 443 scratching the copper layer of the copper-clad laminate. The upper end of the sleeve 443 is connected to the end cap 444 by a thread. The sleeve 443 is equipped with a first spring. The outer end of the first spring abuts against the inner wall of the end cap 444. The inner end of the first spring is equipped with a pressure head. The inner end of the pressure head is formed with an arc-shaped recess. The ball 457 abuts against the arc-shaped recess of the pressure head. When constraining the copper-clad laminate, the ball 457 is used to prevent excessive force from damaging the copper-clad laminate.

[0051] Multiple vertical adjustment plates 448 are provided on the outer wall of the moving plate 441. A pair of vertical guide grooves 449 are provided on the vertical adjustment plates 448. Adjusting screws 450 are inserted into the vertical guide grooves 449. The inner end of the adjusting screws 450 is threaded to the outer wall of the moving plate 441. A pressure rod 447 is rotatably provided on the inner end of the vertical adjustment plates 448.

[0052] Multiple pairs of rectangular holes are provided on the vertical surface of the concave side member 432. A concave top member 445 is movably provided in each pair of rectangular holes. The inner end of the concave top member 445 on the same side is fixed with a side constraint plate 458 by screws. Two pairs of inclined grooves 446 are provided on the outer end of the concave top member 445. Each pair of inclined grooves 446 is symmetrical to each other. The outer end of the inclined groove 446 extends inward at an inclination. The two ends of the pressure rod 447 pass through the inclined groove 446.

[0053] An extension rod 451 is threadedly connected to the outer wall of the side restraint plate 458. The extension rod 451 passes through the concave side member 432 on the same side. An inner pressure cross arm 452 is threadedly connected to the outer end of the extension rod 451 on the same side. A second spring 459 is sleeved on the extension rod 451. The inner end of the second spring 459 abuts against the outer wall of the concave side member 432, and the outer end of the second spring 459 abuts against the inner wall of the inner pressure cross arm 452. The inner pressure cross arm 452 has L-shaped inner top arms 453 on its upper and lower sides. The outer ends of the inner top arms 453 are connected to a wheel axle 454. The inner pressure roller 456 is rotatably mounted. An abutment plate 422 is fixed on the fixed plate 413. The inner wall of the abutment plate 422 is formed with an inclined surface 423. The inclined surface 423 is located at one end facing the gear 421. The end of the inclined surface 423 facing the gear 421 extends outward at an angle. The inner end of the inclined surface 423 is formed with an L-shaped groove 424. The outer periphery of the inner pressure roller 456 abuts against the inner wall of the abutment plate 422. When the inner pressure roller 456 moves from the inclined surface 423 to the groove 424, the inner pressure roller 456 moves inward to constrain the copper-clad laminate through the side constraint plate 458 and the ball bearing 457.

[0054] like Figure 10 and Figure 11 As shown above, the storage rack 5, the first discharge rack 6, and the second discharge rack 7 have the same structure. Therefore, in this embodiment, only the storage rack 5 will be used as the subject to describe the structure of the above three components. Specifically, the storage rack 5 includes a lower plate 500, on which a vertical back plate 501 is fixed. Multiple pairs of concave tubes 502 are welded in an equally spaced array along the vertical direction on the vertical back plate 501. Embedded guide sleeves 503 are welded to the upper and lower sides of the inside of the concave tubes 502. Optionally, the vertical back plate 501 is rotatably mounted on the lower plate 500 to facilitate the placement or removal of the copper-clad laminate.

[0055] The vertical back plate 501 has multiple sets of vertically arranged oblong holes 508. An I-shaped limiting vertical bar 504 is fixed to the inner side of the vertical back plate 501 by screws. Multiple pairs of movable sleeves 505 are fitted onto the limiting vertical bar 504. A clamping plate 506 is formed at the other end of each movable sleeve 505. Every four clamping plates 506 form a clamping part. Each clamping part corresponds one-to-one with a concave tube 502. Each clamping part is located at each corresponding pair of concave tubes 502. Between 2, in each clamping part, the length of the upper clamping plate 506 is shorter than the length of the lower clamping plate 506. The two sides of the movable sleeve 505 are respectively formed with wing plates 507. The wing plates 507 are connected to the movable through rods 509 by threads. The movable through rods 509 are inserted into the waist-shaped holes 508. The other ends of every four movable through rods 509 at the same height are connected to the inner moving horizontal plate 516 by threads. The inner moving horizontal plate 516 is connected to the protruding rod 515 by threads.

[0056] A pair of transverse inner columns 519 are welded to the back side of the vertical back plate 501. A transverse guide hole 510 is provided on each transverse inner column 519, and a pair of movable rods 511 are movably installed within the transverse guide hole 510. A concave sleeve 512 is fitted onto each transverse inner column 519, and the movable rods 511 pass through the concave sleeves 512. The axial direction of the movable rods 511 is limited by a threaded nut. A movable vertical plate 513 is welded between the concave sleeves 512. Multiple pairs of inner pressure plates are arranged in an equally spaced array along the length of the movable vertical plate 513. The inclined holes 514 are symmetrical to each other. There is an angle between the length direction of the inclined holes 514 and the width direction of the moving vertical plate 513. The protruding rods 515 and the inclined holes 514 are in a one-to-one correspondence. The protruding rods 515 pass through the corresponding inclined holes 514. The moving vertical plate 513 is welded with connecting protrusions 517. The connecting protrusions 517 are fixed with second cylinders 518. The cylinder body of the second cylinder 518 is fixed to the vertical back plate 501 by screws.

[0057] Based on the above embodiments, the following detection implementation method is provided:

[0058] Step 001: The operator or a six-axis robot places the copper-clad laminate on the storage rack 5 from bottom to top. Specifically, the placement operation is carried out in the following way: the copper-clad laminate is placed on each pair of longer clamping plates 506. The second cylinder 518 is activated, causing the moving vertical plate 513 to move along its width and the length of the transverse inner column 519 within the transverse guide hole 510 towards the end away from the second cylinder 518. During the movement, the inner pressure inclined hole 514 on the moving vertical plate 513 acts on the protruding rod 515, causing each pair of protruding rods 515 to move closer to each other. When the protruding rods 515 move closer, they will cause each pair of inner moving horizontal plates 516 to move closer to each other, and during the process of moving closer, each pair of clamping plates 506 will move closer to each other, so that the copper-clad laminate is clamped and constrained by the four clamping plates 506. Since the clamping process involves surface-to-surface contact to avoid damage to the copper layer of the copper-clad laminate, it is also necessary to ensure that the distance between the edge of the copper-clad laminate and the clamping plate 506 is approximately equal during clamping.

[0059] In step 002, the moving motor 204 is started, causing the lead screw 211 to rotate. The rotation of the lead screw 211 will drive the moving base 212 to move, thereby moving the moving base 212 and the moving chassis 205 to the position of the storage rack 5. Simultaneously, the moving motor 204 stops rotating due to the proximity switch located at this position. At this time, the unloaded transfer mechanism 4 will move to the position of the storage rack 5.

[0060] Step 003: Start the first cylinder 429 to move the rack 426 outward along the axial direction of the guide rod 428, causing the rack 426 to mesh with the gear 421. Then, start the push-pull motor 403, which drives the first bevel gear 404 to rotate. The rotation of the first bevel gear 404 will drive the second bevel gear 405 and the third bevel gear 406 to rotate synchronously and in opposite directions. The rotation of the second bevel gear 405 and the third bevel gear 406 will drive the sixth bevel gear 409 and the fourth bevel gear 411 to rotate synchronously and in opposite directions via the second drive shaft 460 and the first drive shaft 407, respectively. The rotation of the sixth bevel gear 409 and the fourth bevel gear 411 will drive the seventh bevel gear 410 and the fifth bevel gear 412 to rotate synchronously and in opposite directions. The rotation, driven by the seventh bevel gear 410 and the fifth bevel gear 412, causes the two rotating shafts 400 to rotate at the same speed but in opposite directions. During the rotation, the gears 421 on them rotate, and the rotation of the gears 421 causes the rack 426 to move the side constraint plate 458 outward. During the movement, the slide rail 425 and each concave tube 502 are aligned. When the slide rail 425 moves outward, the outer end of the slide rail 425 will be inserted into the inner guide sleeve 503. During the movement, the copper-clad plate and the four clamping plates 506 pass between the horizontal plates 414 and through the rectangular frame 438 until one end of the copper-clad plate abuts against the inner wall of the baffle 436. At this time, the copper-clad plate is located between the upper and lower sets of ball bearings 457 and the side constraint plate 458.

[0061] Step 004: Activate the second cylinder 518 to open the clamping plate 506 and move it away from the copper-clad laminate. The copper-clad laminate will then naturally fall onto the lower ball bearing 457. Next, activate the push-pull motor 403 again to reset the rack 426. During this reset process, the inner pressure roller 456 also moves inward. When the inner pressure roller 456 contacts the inclined surface 423 of the abutment plate 422, the inclined surface 423 exerts an inward pushing force, causing it to move inward. As the inner pressure roller 456 moves inward, the side constraint plate 458 moves inward, and the second spring 459 is compressed. When the side constraint plate 458 moves inward, the inner wall of one of the side constraint plates 458 will abut against one side of the copper-clad laminate, causing it to move closer to the other side constraint plate 458. The copper-clad laminate is centered and constrained by the side constraint plate 458. As the side constraint plate 458 moves, the concave top piece 445 also moves inward. During its movement, the inclined groove 446 on it acts on the pressure rod 447, causing the pressure rod 447 to drive the moving plate 441 and its multiple balls 457 closer to the copper-clad laminate. Finally, the copper-clad laminate is constrained by the balls 457 and the side constraint plate 458. During the constraint process, the presence of the second spring causes the balls 457 to form a flexible constraint on the copper-clad laminate. Finally, the constrained copper-clad laminate will face the window 434 and the transparent plate 435 on it. At this time, the inner pressure roller 456 will be blocked by the stop groove 424 and stop moving. At the same time, the push-pull motor 403 also stops rotating. Then the first cylinder 429 is activated again to disengage the rack 426 and the gear 421. During the disengagement process, the locking block located on the outside of the guide sleeve 420 will lock into the locking groove located on the inside of the rack 426. At this time, the rack 426 will be completely locked to prevent the rack 426 from moving and the constraint from weakening during the movement.

[0062] In step 005, the moving motor 204 is started, causing the copper-clad laminate to pass through the detection unit 3. When the copper-clad laminate passes through the detection unit 3, the laser emitter 33 on the detection unit 3 emits a pair of parallel beams of light. These beams need to be modulated so that the distance between the beams is equal to the thickness of the copper-clad laminate. The emitted light passes through the transparent plate 435, the upper and lower sides of the copper-clad laminate, and is directed towards the laser receiver 34. If the copper-clad laminate is warped or twisted, the upper or lower side of the copper-clad laminate will arch, or one corner of the copper-clad laminate will warp. When the light passes through the deformed part, the light intensity received by the laser receiver 34 will change due to obstruction or partial obstruction. If the light intensity signal is plotted as a straight line, it will dip downwards when the light intensity signal weakens. Therefore, the change in the light intensity signal can indicate whether the copper-clad laminate has warped. If one or more copper-clad laminates have warped, the overall control system controls the first cylinder 429 on each transfer mechanism 4 according to whether the copper-clad laminate has a defect.

[0063] Step 006: When the copper-clad laminate moves to the first discharge rack 6 under the drive of the moving mechanism 2, the first cylinder 429 on the transfer mechanism 4 carrying the warp defect is activated, so that the rack 426 and the gear 421 re-engage. Then, under the drive of the push-pull motor 403, the defective copper-clad laminate is placed between the clamping plates 506 at the corresponding height. Before placement, the clamping plates 506 are in an open state under the drive of the second cylinder 518. When the rack 426 moves into place, the second cylinder 518 can drive the clamping plates 506 to approach the copper-clad laminate to clamp and constrain it. After the copper-clad laminate is removed, the transfer mechanism 4 resets again.

[0064] Step 007: When the copper-clad laminate moves to the second discharge rack 7 under the drive of the moving mechanism 2, the main control system controls the first cylinder 429 on the transfer mechanism 4 where the copper-clad laminate with warpage is within the normal range, so that the transfer mechanism 4 carrying the copper-clad laminate moves to the second discharge rack 7 and finally places the copper-clad laminate on it.

[0065] Step 008: After one inspection is completed, the copper-clad laminates on the first and second output racks 6 and 7 can be transferred to the designated positions by a six-axis robot or operator. At the same time, during the inspection process, copper-clad laminates to be inspected need to be added to the storage rack 5.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A device for detecting the warpage of copper-clad laminates, characterized in that, It includes a platform (1), a moving mechanism (2) on the platform (1), detection units (3) on both sides of the moving mechanism (2), multiple transfer mechanisms (4) arranged in a vertical array on the moving mechanism (2), and a storage rack (5), a first discharge rack (6) and a second discharge rack (7) with the same structure on one side of the moving mechanism (2). The moving mechanism (2) is used to drive the transfer mechanism (4) to move linearly. It has a moving chassis (205) with a moving configuration, and four vertical rods (206) are installed on the moving chassis (205). The detection unit (3) includes a pair of fixing strips (31), which are distributed on both sides of the moving mechanism (2). The inner wall of the fixing strip (31) is formed with an inner strip (32). Multiple laser emitters (33) are sleeved on one inner strip (32), and multiple laser receivers (34) are sleeved on the other inner strip (32). The laser receivers (34) and the laser emitters (33) are in a one-to-one correspondence, and the laser emitters (33) have two laser emitting heads. The transfer mechanism (4) includes multiple fixed blocks (417) fixed on the vertical rod (206). The fixed blocks (417) located at the same height and on the same side are fixed with a pair of fixed plates (413). The fixed plates (413) are located at the upper and lower ends of the fixed blocks (417). The two ends of the fixed plates (413) are respectively fixed with horizontal plates (414). The vertical rod (206) passes through the fixed plates (413). The inner side of the fixed plates (413) is fixed with guide sleeves (420). The guide sleeves (420) located on the same side are slidably provided with slide rails (425). The inner side of the slide rails (425) is fixed with a first cylinder (429). The movable end of the first cylinder (429) is fixed with a rack (426). The inner side of the rack (426) is fixed with multiple guide rods (428). The guide rods (428) are movably provided on the slide rails (425). Gears (421) are provided between each pair of fixed plates (413). Gears (421) located in the same vertical direction are fixed on a rotating shaft (400), and the rotating shafts (400) rotate in opposite directions. The inner side of the slide rail (425) is formed with multiple inner extension arms (430). The inner end of the inner extension arm (430) located on the same side is fixed with a concave side piece (432). One end of the concave side piece (432) is fixed with an end strip (433). A window (434) is opened on the end strip (433). A transparent plate (435) is fixed on the outside of the window (434). The other end of the concave side piece (432) is fixed with an end block (437). A rectangular frame (438) is welded to the outer end of the end block (437). Multiple guide posts (439) are fixed on the upper and lower sides of the concave side member (432). A movable plate (441) is movably provided on the guide post (439) on the same side. An inner extension plate (442) is fixed on the movable plate (441). A round sleeve (443) is welded to the inner end of the inner extension plate (442). A ball bearing (457) is rotatably provided inside the lower end of the round sleeve (443). Multiple vertical adjustment plates (448) are provided on the outer wall of the movable plate (441), and a pressure rod (447) is rotatably provided on the inner end of the vertical adjustment plate (448). The concave side member (432) has multiple pairs of rectangular holes on its vertical surface. Each pair of rectangular holes has a concave top member (445) that is movable inside. The inner end of the concave top member (445) located on the same side is fixed with a side constraint plate (458). The outer end of the concave top member (445) has two pairs of inclined grooves (446). Each pair of inclined grooves (446) is symmetrical to each other. The outer end of the inclined groove (446) extends inward at an inclination. The two ends of the pressure rod (447) pass through the inclined groove (446).

2. The copper-clad laminate warpage detection device according to claim 1, characterized in that, An extension rod (451) is connected to the outer wall of the side restraint plate (458). The extension rod (451) passes through the concave side member (432). An inner pressure cross arm (452) is connected to the outer end of the extension rod (451) on the same side. A second spring (459) is sleeved on the extension rod (451). The inner end of the second spring (459) abuts against the outer wall of the concave side member (432), and the outer end of the second spring (459) abuts against the inner wall of the inner pressure cross arm (452). The inner pressure cross arm (452) is... The lower two sides are formed with L-shaped inner top arms (453), and the outer end of the inner top arms (453) is rotatably provided with an inner pressure wheel (456). A stop plate (422) is fixed on the fixed plate (413). The inner wall of the stop plate (422) is formed with a slope (423). The end of the slope (423) facing the gear (421) extends outward at an angle. The inner end of the slope (423) is formed with an L-shaped retaining groove (424). The outer periphery of the inner pressure wheel (456) abuts against the inner wall of the stop plate (422).

3. The copper-clad laminate warpage detection device according to claim 1, characterized in that, A pair of second bearing seats (401) are provided at the lower end of the rotating shaft (400). The second bearing seats (401) are fixed on the moving mechanism (2). A drive seat (402) is installed on the moving chassis (205). A push-pull motor (403) is installed on the drive seat (402). A first bevel gear (404) is connected to the output shaft of the push-pull motor (403). A second bevel gear (405) meshes with one side of the first bevel gear (404), and a third bevel gear (406) meshes with the other side of the first bevel gear (404). A first drive shaft is fixed on the third bevel gear (406). (407) A fourth bevel gear (411) is fixed at the other end of the first drive shaft (407). A fifth bevel gear (412) meshes with the upper side of the fourth bevel gear (411). The fifth bevel gear (412) is fixed on one of the rotating shafts (400). A second drive shaft (460) is fixed on the second bevel gear (405). A sixth bevel gear (409) is fixed at the other end of the second drive shaft (460). A seventh bevel gear (410) meshes with the lower side of the sixth bevel gear (409). The seventh bevel gear (410) is fixed on another rotating shaft (400).

4. The copper-clad laminate warpage detection device according to claim 1, characterized in that, A pair of vertical guide grooves (449) are provided on the vertical adjustment plate (448), and an adjustment screw (450) is inserted in the vertical guide groove (449). The inner end of the adjustment screw (450) is connected to the outer wall of the moving plate strip (441).

5. The copper-clad laminate warpage detection device according to claim 1, characterized in that, The upper and lower ends of the fixing block (417) are respectively formed with T-shaped limiting members (418). The side wall of the fixing plate (413) is provided with a pair of U-shaped grooves (415). The vertical rod (206) passes through the U-shaped grooves (415). The side wall of the fixing plate (413) is formed with two pairs of protruding plates (416). The protruding plates (416) are located on both sides of the U-shaped grooves (415) and are inserted into the inside of the limiting members (418).

6. The copper-clad laminate warpage detection device according to claim 1, characterized in that, A pair of baffles (436) are fixed on the inner side of the end bar (433) to limit one end of the copper-clad laminate.

7. The copper-clad laminate warpage detection device according to claim 1, characterized in that, The inner end of the sleeve (443) has a tapered structure, and the outer diameter of the inner end of the sleeve (443) is smaller than the outer diameter of its outer end.

8. The copper-clad laminate warpage detection device according to claim 1, characterized in that, The upper end of the sleeve (443) is connected to the end cap (444). The sleeve (443) is provided with a first spring. The outer end of the first spring abuts against the inner wall of the end cap (444). The inner end of the first spring is provided with a pressure head. The inner end of the pressure head is formed with an arc-shaped recess. The ball (457) abuts against the arc-shaped recess of the pressure head.

9. The copper-clad laminate warpage detection device according to claim 1, characterized in that, The storage rack (5) includes a lower plate (500), a vertical back plate (501) is fixed on the lower plate (500), and multiple pairs of concave tubes (502) are welded on the vertical back plate (501). Embedded guide sleeves (503) are welded on the upper and lower sides inside the concave tubes (502). The vertical back plate (501) has multiple sets of vertically arranged waist-shaped holes (508). The inner side of the vertical back plate (501) is fixed with a limiting vertical bar (504) in the shape of an I-beam. Multiple pairs of movable sleeves (505) are fitted on the limiting vertical bar (504). The other end of the movable sleeve (505) is formed with a clamp (506). Wings (507) are formed on both sides of the movable sleeve (505). Movable through rods (509) are connected to the wings (507). The movable through rods (509) are inserted into the waist-shaped holes (508). The other end of every four movable through rods (509) at the same height is connected to an inner moving horizontal plate (516). A protruding rod (515) is connected to the inner moving horizontal plate (516). A pair of transverse inner columns (519) are welded to the back side of the vertical back plate (501). A transverse guide hole (510) is provided on the transverse inner column (519). A pair of movable rods (511) are movably installed in the transverse guide hole (510). A concave sleeve (512) is fitted on the transverse inner column (519). The movable rods (511) pass through the concave sleeve (512). A movable vertical plate (513) is welded between the concave sleeves (512). A plurality of pairs of internal pressure inclined holes (514) are provided on the movable vertical plate (513). Each pair of internal pressure inclined holes (514) The components are symmetrical to each other. There is an angle between the length direction of the inner pressure inclined hole (514) and the width direction of the moving vertical plate (513). The protruding rod (515) and the inner pressure inclined hole (514) are in a one-to-one correspondence. The protruding rod (515) passes through the inner pressure inclined hole (514) corresponding to it. A connecting protrusion (517) is welded on the moving vertical plate (513). A second cylinder (518) is fixed on the connecting protrusion (517). The cylinder body of the second cylinder (518) is fixed on the vertical back plate (501).

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