Depth detection device and drilling and measuring integrated processing system

Abstract

The application provides a depth detection device and a drilling and measuring integrated machining system. The drilling and measuring integrated machining system comprises a machining spindle and a depth detection device. The machining spindle is used for back drilling processing of a PCB. The depth detection device comprises a base, a cross beam arranged on the base, a horizontal moving device arranged on the base and used for outputting movement in a first direction and a second direction, a mounting platform mounted on the horizontal moving device and used for placing the PCB, the PCB being formed with a plurality of to-be-measured holes, a lifting mechanism mounted on the cross beam, and a measuring instrument connected to the lifting mechanism and used for driving the measuring instrument to lift along a height direction so that a focal point of the measuring instrument falls on different depth positions of the to-be-measured holes, and the depth of the plurality of to-be-measured holes is detected by the measuring instrument. The application reduces the risk of shaking of the measuring instrument, thereby protecting optical elements in the measuring instrument and improving the test accuracy, test stability and long-term service life of the measuring instrument.

Description

Technical Field

[0001] This application belongs to the field of depth detection technology, and more specifically, relates to a depth detection device and an integrated drilling and measurement processing system. Background Technology

[0002] In multilayer PCB manufacturing, through-holes (PTHs) are used to connect conductive tracks between different layers, penetrating from the front to the back of the board to achieve interlayer electrical connections. Some of these excess through-holes are called stubs. Stubs can act like antennas during high-speed signal transmission, easily causing signal reflection and electromagnetic interference. Therefore, additional drilling is required from the back to remove the excess stubs. The holes formed by this operation are called back-drilled holes.

[0003] The actual depth of back-drilled holes is an important indicator of the drilling quality of PCB boards. Therefore, after the back-drilled holes are formed, it is necessary to measure their actual depth. In actual measurement, since there are many back-drilled holes on the PCB board, the depth of each back-drilled hole needs to be measured sequentially. This requires moving the measuring instrument, which causes significant vibration during movement. This not only leads to low measurement accuracy but also damages the optical components inside the measuring instrument. Utility Model Content

[0004] The purpose of this application is to provide a depth detection device and an integrated drilling and measuring system to solve the technical problem of large movement and shaking of the measuring instrument in the existing depth detection device.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a depth detection device, comprising: Base: A crossbeam is provided on the base; A horizontal moving device, disposed on the base, is used to output movement along a first direction and a second direction; An installation platform is mounted on the horizontal moving device. The installation platform is used to place a PCB board, and the PCB board has multiple holes to be tested. A lifting mechanism is installed on the crossbeam; A measuring instrument is connected to the lifting mechanism, which is used to drive the measuring instrument to move up and down in the height direction so that the focus of the measuring instrument falls on different depth positions of the hole to be measured, so as to detect the depth of multiple holes to be measured by the measuring instrument.

[0006] In some embodiments, the horizontal moving device includes a first moving mechanism and a second moving mechanism; the second moving mechanism is used to output movement along a second direction, the first moving mechanism is used to output movement along a first direction, the first moving mechanism is mounted on the second moving mechanism, the mounting platform is mounted on the first moving mechanism, and the first direction intersects the second direction.

[0007] In some embodiments, the first moving mechanism includes a mounting base, a first linear guide rail, a first slider, and a first motor module, wherein the first motor module drives the first slider to move on the first linear guide rail. The second moving mechanism includes a second linear guide rail, a second slider, and a second motor module. The second linear guide rail is mounted on the base, the mounting base is connected to the second slider, and the second motor module is used to drive the mounting base to move on the second linear guide rail. The extension directions of the first linear guide and the second linear guide are perpendicular to each other.

[0008] In some embodiments, the measuring instrument includes a measuring device and a visual positioning device, the visual positioning device being used to locate the horizontal position of the hole to be measured, and the measuring device being used to detect the depth of the hole to be measured.

[0009] In some embodiments, the measuring instrument further includes a movable connecting plate connected to the lifting mechanism, the lifting mechanism being able to drive the movable connecting plate to move up and down, and both the measuring device and the visual positioning device being mounted on the movable connecting plate.

[0010] In some embodiments, the mounting platform has a bearing surface for supporting the PCB board, and the mounting platform also has a plurality of adsorption holes, one end of each adsorption hole penetrating through the bearing surface, and the other end of each adsorption hole being connected to a vacuum device, the adsorption holes being used to fix the PCB board on the mounting platform.

[0011] In some embodiments, the crossbeam includes a beam plate and at least two shims, each of the shims being mounted on the base and surrounding the outside of the horizontal moving device; the beam plate is connected between the shims, and the horizontal moving device is horizontally disposed below the beam plate.

[0012] In some embodiments, the depth detection device includes at least two lifting mechanisms and at least two mounting platforms; each of the lifting mechanisms is spaced apart along a first direction and / or a second direction, and each of the lifting mechanisms is respectively located above each of the mounting platforms; the output end of each of the lifting mechanisms is equipped with the measuring instrument, and each of the mounting platforms is used to mount one of the PCB boards.

[0013] In some embodiments, the mounting platforms are integrally connected, and each mounting platform is mounted on the output end of the horizontal moving device.

[0014] In some embodiments, the measuring instrument is used to send and receive infrared light to measure the depth of each of the holes to be measured based on the interference signal of the infrared light.

[0015] On the other hand, this application also provides a drilling and measurement integrated processing system, including a processing spindle and the aforementioned depth detection device. The depth detection device is connected to the processing spindle, the processing spindle is used to perform back drilling on the PCB board, and the depth detection device is used to measure the depth of the hole to be measured after back drilling.

[0016] The beneficial effects of the depth measurement equipment and integrated drilling and measuring system provided in this application are as follows: The horizontal moving device allows the mounting platform and its PCB board to move along the first and second directions, eliminating the need for the measuring instrument to move horizontally. This reduces the risk of the measuring instrument being shaken, protecting the optical components inside the instrument and improving its testing accuracy, stability, and long service life. Furthermore, the lifting mechanism allows for adjustment of the measuring instrument's height, ensuring that the focal point of the measuring instrument is within the depth range of the hole being measured during depth measurement, thereby improving the accuracy of the depth measurement. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the depth detection device provided in the embodiments of this application; Figure 2 A schematic diagram of the structure of a PCB board inspected by the depth inspection equipment provided in this application embodiment; Figure 3 This is a schematic diagram of the structure of the base and the second moving mechanism in the depth detection device provided in the embodiments of this application; Figure 4 A schematic diagram of the base, first moving mechanism, and second moving mechanism in the depth detection device provided in this application embodiment; Figure 5 for Figure 1 Enlarged structural diagram of the lifting mechanism section of the medium-depth detection equipment; Figure 6 This is a schematic diagram of the installation structure of the visual positioning device in the depth detection equipment provided in the embodiments of this application.

[0019] The following are the labeling elements in the figure: 100. Horizontal moving device; 110. First moving mechanism; 111. First motor module; 120. Second moving mechanism; 121. Second motor module; 200. Mounting platform; 210. Bearing surface; 220. Adsorption hole; 300. Lifting mechanism; 400. Measuring instrument; 410. Measuring device; 420. Vision positioning device; 440. Fine-tuning mechanism; 441. Lead screw; 442. Nut; 443. Knob; 444. Locking block; 460. Movable connecting plate; 494. Fourth linear guide rail; 495. Fourth slider; 496. Second mounting plate; 49 7. Third mounting plate; 500. Base; 600. Mounting seat; 700. Crossbeam; 710. Elevating piece; 720. Beam plate; 800. Second guide mechanism; 810. Second linear guide rail; 820. Second slider; 900. First guide mechanism; 910. First linear guide rail; 1000. Third guide mechanism; 1001. Third linear guide rail; 1002. Third slider; 1200. Connector; 1400. Limiting structure; 1401. First baffle; 1402. Second baffle; 2. PCB board; 21. Hole to be tested; 22. Front; 23. Back. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] As described in the background section, the actual depth of back-drilled holes is an important indicator of the drilling quality of PCB boards. Therefore, after the back-drilled holes are formed, it is necessary to measure their actual depth. In actual measurement, due to the large number of back-drilled holes on the PCB board, the depth of each back-drilled hole needs to be measured sequentially. This requires moving the measuring instrument, which causes significant vibration during movement. This not only leads to low measurement accuracy but also damages the optical components inside the measuring instrument.

[0025] To address the aforementioned technical problems, this application provides a depth detection device equipped with a horizontal moving device 100. The horizontal moving device 100 drives the mounting platform 200 and its PCB board 2 to move along a first direction and / or a second direction, eliminating the need for the measuring instrument 400 to move horizontally. This reduces the risk of the measuring instrument 400 being shaken, thereby protecting the optical components inside the measuring instrument 400 and improving the testing accuracy, testing stability, and long service life of the measuring instrument 400.

[0026] Please see Figure 1 and Figure 2 The depth detection device provided in the embodiments of this application will now be described.

[0027] The depth detection device includes a base 500, a crossbeam 700, a horizontal moving device 100, a mounting platform 200, a lifting mechanism 300, and a measuring instrument 400. The crossbeam 700 is mounted on the base 500. The horizontal moving device 100 is mounted on the base and is used to output movement along a first direction and a second direction. The mounting platform 200 is mounted on the horizontal moving device 100 and is used to place a PCB board 2, in which multiple test holes 21 are formed. The lifting mechanism 300 is mounted on the crossbeam 700. The measuring instrument 400 is connected to the lifting mechanism 300, which is used to drive the measuring instrument 400 to move up and down in the height direction so that the focus of the measuring instrument 400 falls on different depth positions of the test holes 21, so as to detect the signal layer position of multiple test holes 21 through the measuring instrument 400.

[0028] The base 500 can support the horizontal moving device 100, the mounting platform 200, the lifting mechanism 300 and the measuring instrument 400, and support them to a certain height to facilitate operation by staff. The base 500 can also be used to move and transfer the entire depth detection equipment.

[0029] The crossbeam 700 allows the lifting mechanism 300 to be installed at a certain height, so that both the lifting mechanism 300 and the measuring instrument 400 are located above the installation platform 200. The horizontal moving device 100 is horizontally inserted through the crossbeam 700, so that the lifting mechanism 300 and the measuring instrument 400 do not occupy the lateral position of the installation platform 200, thereby making the movement space of the installation platform 200 in the first and second directions sufficiently large.

[0030] Before testing, the PCB board 2 is placed on the mounting platform 200 so that each hole 21 to be tested is located below the measuring instrument 400. Then, the mounting platform 200 and the PCB board 2 on it are moved along the first direction and / or the second direction by the horizontal moving device 100, so that each hole 21 to be tested on the PCB board 2 is moved sequentially to directly below the measuring instrument 400, so that the measuring instrument 400 can accurately measure each hole 21.

[0031] Additionally, it should be noted that the measuring instrument 400 typically obtains the actual depth of the hole 21 by acquiring its three-dimensional information. For each measuring instrument 400, its focal depth is a fixed value. When the difference in the actual depth of each hole 21 exceeds the focal depth range, the same measuring instrument 400 cannot accurately measure the actual depth of multiple holes 21; that is, the actual depth of some holes 21 cannot be accurately measured. In this embodiment, the lifting mechanism 300 allows adjustment of the height of the measuring instrument 400 according to the actual depth of different holes 21. This ensures that when measuring each hole 21, the focal point of the measuring instrument 400 is always located at the actual depth position of the hole 21, thereby detecting the signal layer position of the hole 21 and obtaining its depth, thus guaranteeing measurement accuracy.

[0032] The depth detection device in this embodiment, through the horizontal moving device 100, allows the mounting platform 200 and its PCB board 2 to move along the first and second directions, eliminating the need for the measuring instrument 400 to move horizontally. This reduces the risk of the measuring instrument 400 being shaken, thereby protecting the optical components inside the measuring instrument 400 and improving its testing accuracy, stability, and long-term service life. Furthermore, the lifting mechanism 300 allows for adjustment of the height of the measuring instrument 400, ensuring that when measuring the depth of the hole 21, the focal point of the measuring instrument 400 is within the depth range of the hole 21, thus improving the depth measurement accuracy.

[0033] In some embodiments, please refer to Figure 2 This depth detection device is primarily used to detect the depth of back-drilled holes. Specifically, the PCB board 2 has a front side 22 and a back side 23 arranged opposite to each other, and the back-drilled hole starts from the back side 23 and drills to a preset depth. During assembly, the PCB board 2 is mounted on the mounting platform 200 with the back side 23 facing upwards. The measuring instrument 400 is located above the back side 23 of the PCB board 2, and the actual depth of the back-drilled hole can be directly measured from the back side 23 of the PCB board 2 using the measuring instrument 400. Specifically, a first distance D1 from the measuring instrument 400 to the back side 23 of the PCB board 2 can be measured first, and then a second distance D2 from the measuring instrument 400 to the signal layer position of the back-drilled hole can be measured. The actual depth of the back-drilled hole is obtained by subtracting the first distance D1 from the second distance D2. It is understood that in other embodiments of this application, this depth detection device can also be used to detect the depth of other holes in the PCB board 2, such as the depth of blind vias, and is not limited to this specific application.

[0034] In some embodiments, the measuring instrument 400 is used to transmit and receive infrared light to measure the depth of each hole 21 to be measured based on the interference signal of the infrared light. Specifically, the measuring instrument 400 is a measuring instrument 400 made by combining the principles of spectral confocalization and Michelson interferometry. Its specific structure and principle will be described in detail in another patent of the applicant and will not be described in detail here. In this embodiment, by using the above-mentioned measuring instrument 400, the measurement accuracy of the actual depth of the back drilled hole can be improved. It is understood that in other embodiments of this application, the measuring instrument 400 may also be a measuring instrument 400 that detects the depth of the back drilled hole by emitting light into it, such as a spectral confocalization instrument, a 3D camera, a telecentric lens, a white light interferometer, a laser rangefinder, a spectral confocal displacement sensor, and a displacement sensor, etc., and is not limited to these here.

[0035] In some embodiments, please refer to Figure 1 , Figure 3 and Figure 4The horizontal moving device 100 includes a first moving mechanism 110 and a second moving mechanism 120. The second moving mechanism 120 outputs movement along a second direction, and the first moving mechanism 110 outputs movement along a first direction. The first moving mechanism 110 is mounted on the second moving mechanism 120, and the mounting platform 200 is mounted on the first moving mechanism 110. The first and second directions intersect. Furthermore, the depth detection device generally includes a controller. The first moving mechanism 110 and the second moving mechanism 120 are communicatively connected to the controller. The controller controls the first moving mechanism 110 and / or the second moving mechanism 120 to drive the mounting platform 200 to move along the first and / or second directions, thereby causing each hole 21 to be measured in the PCB board 2 to move sequentially below the measuring instrument 400, so that the depth of each hole 21 can be detected by the measuring instrument 400. It is understood that in other embodiments of this application, the second moving mechanism 120 may also be mounted on the first moving mechanism 110, and the mounting platform 200 may be mounted on the second moving mechanism 120; this is not a unique limitation.

[0036] Preferably, the first direction is perpendicular to the second direction.

[0037] Optionally, the first moving mechanism 110 includes a first motor module, which drives the mounting platform 200 to move along a first direction. The first motor module directly pushes the mover along the first linear guide rail 810 via electromagnetic force. The first motor module has the advantages of high speed, high acceleration, and high responsiveness, thereby improving the detection efficiency of the entire depth detection equipment. It is understood that in other embodiments of this application, the first moving mechanism 110 may also include a ball screw mechanism, a screw and nut mechanism, a belt transmission mechanism, a chain transmission mechanism, or a gear and rack mechanism, etc., and is not limited to these specific mechanisms.

[0038] The second moving mechanism 120 includes a second motor module, which drives the first moving mechanism 110 to move along a second direction. The second motor module directly pushes the mover along the second linear guide rail 810 via electromagnetic force. The second motor module has the advantages of high speed, high acceleration, and high responsiveness, thereby improving the detection efficiency of the entire depth detection equipment. It is understood that in other embodiments of this application, the second moving mechanism 120 may also include a ball screw mechanism, a screw and nut mechanism, a belt transmission mechanism, a chain transmission mechanism, or a gear and rack mechanism, etc., and is not limited to these specific mechanisms.

[0039] In some embodiments, please refer to Figure 3 and Figure 4 The first moving mechanism 110 includes a mounting base 600, a first linear guide rail 910, a first slider 920, and a first motor module 111. The first motor module 111 drives the first slider 920 to move on the first linear guide rail 910. The second moving mechanism 120 includes a second linear guide rail 810, a second slider, and a second motor module 121. The second linear guide rail is mounted on the base 500, the mounting base 600 is connected to the second slider, and the second motor module 121 is used to drive the mounting base 600 to move on the second linear guide rail 810. The extension directions of the first linear guide 910 and the second linear guide 810 are perpendicular to each other.

[0040] In some embodiments, please refer to Figure 3 and Figure 4 The depth measurement device also includes a second guide mechanism 800, a first guide mechanism 900, and a mounting base 600. The mounting base 600 is connected to the output end of the second moving mechanism 120, and the first moving mechanism 110 is mounted on the mounting base 600. The second guide mechanism 800 is connected between the base 500 and the mounting base 600, and is used to guide the mounting base 600 and the first moving mechanism 110 to move along a second direction. The first guide mechanism 900 is connected between the mounting base 600 and the mounting platform 200, and is used to guide the mounting platform 200 and the PCB board 2 to move along a first direction. The arrangement of the second guide mechanism 800 and the first guide mechanism 900 ensures the smoothness of movement and the accuracy of linear movement of the mounting platform 200 and the PCB board 2 along the first and second directions. Furthermore, the mounting base 600 can support the first moving mechanism 110, allowing the first moving mechanism 110 to have a larger range of movement along the first direction, thereby enabling depth measurement of a larger area of ​​the PCB board 2.

[0041] For some specific embodiments, please refer to Figure 3 and Figure 4 The second guiding mechanism 800 includes at least two second linear guide rails 810 and at least two second sliders 820. Each second linear guide rail 810 is mounted on the base 500. The second linear guide rails 810 are spaced apart along a first direction and extend along a second direction. At least two second sliders 820 are slidably provided for each second linear guide rail 810. The at least two second sliders 820 are spaced apart along the extension direction of the second linear guide rail 810. Each second slider 820 is connected to a different position of the mounting base 600 to achieve sliding guidance of the mounting base 600.

[0042] In some embodiments, please refer to Figure 4The first guide mechanism 900 includes at least two first linear guides 910 and a plurality of first sliders (not shown). Each first linear guide 910 is mounted on the mounting base 600. Each first linear guide 910 is spaced apart along a second direction and extends along a first direction. At least two first sliders are slidably provided for each first linear guide 910. The at least two first sliders are spaced apart along the extension direction of the first linear guide 910. Each first slider is connected to a different position on the mounting platform 200 to achieve sliding guidance of the mounting platform 200.

[0043] In some embodiments, please refer to Figure 1 The mounting platform 200 has a bearing surface 210 for supporting the PCB board 2. The mounting platform 200 also has multiple suction holes 220, one end of which penetrates the bearing surface 210, and the other end of each suction hole 220 is connected to a vacuum device. The suction holes 220 are used to fix the PCB board 2 onto the mounting platform 200. When assembling the PCB board 2, the PCB board 2 is first placed on the bearing surface 210 of the mounting platform 200 with its back side 23 facing upwards, and its position is determined. Then, the vacuum device is activated to evacuate each suction hole 220, creating a negative pressure within each suction hole 220. This tightly adheres the front side 22 of the PCB board 2 to the bearing surface 210 of the mounting platform 200. This not only ensures the secure mounting of the PCB board 2 on the mounting platform 200 and the stability of its movement, thus guaranteeing measurement accuracy, but also eliminates the need for mounting and fitting structures on the PCB board 2, simplifying its installation. It is understood that in other embodiments of this application, the PCB board 2 can also be clamped on the mounting platform 200 by clamping fixtures or other means, which is not the only limitation here.

[0044] In some embodiments, please refer to Figure 1 The adsorption holes 220 are distributed in a matrix along the first and second directions on the mounting platform 200 to ensure that the PCB board 2 is evenly stressed and to ensure the stability of the PCB board 2 on the mounting platform 200.

[0045] In some embodiments, please refer to Figure 1The crossbeam 700 includes a beam plate 720 and at least two raised supports 710. Each raised support 710 is installed on the base 500 and surrounds the outside of the horizontal moving device 100. The beam plate 720 is connected between the raised supports 710 and is located above the mounting platform 200. The lifting mechanism 300 is installed on the beam plate 720, and the horizontal moving device 100 is horizontally inserted below the beam plate 720. The arrangement of at least two raised supports 710 can raise the beam plate 720 to a certain height, so that the beam plate 720 is located above the horizontal moving device 100 and the mounting platform 200. This allows the horizontal moving device 100 to move along the direction perpendicular to the distribution of the two raised supports 710, passing under the beam plate 720. In other words, it avoids interference of the beam plate 720 with the movement of the horizontal moving device 100 and increases the range of motion of the horizontal moving device 100.

[0046] For some specific embodiments, please refer to Figure 1 The crossbeam 700 includes two shims 710, which are respectively disposed on opposite sides of the horizontal moving device 100 along the first direction. The beam plate 720 extends along the first direction, and the horizontal moving device 100 is disposed below the beam plate 720 and passes through the beam plate 720 along the second direction. That is, the PCB board 2 can be moved along the second direction to the area below the beam plate 720, so that the measuring instrument 400 on the beam plate 720 can be raised and lowered to measure the hole 21 to be measured on the PCB board 2. It can be understood that in other embodiments of this application, the two shims 710 can also be respectively disposed on opposite sides of the horizontal moving device 100 along the second direction, and the beam plate 720 can extend along the second direction, so that the horizontal moving device 100 can pass through the area below the beam plate 720 along the first direction. In addition, two shims 710 can be placed at opposite corners of the horizontal moving device 100, or three or more shims 710 can be placed. In this case, each shim 710 can be placed on opposite sides of the horizontal moving device 100 or on three or four adjacent sides in sequence. There is no unique limitation here.

[0047] In some embodiments, please refer to Figure 1 The depth measurement device includes at least two lifting mechanisms 300 and at least two mounting platforms 200. The lifting mechanisms 300 are spaced apart along a first direction and / or a second direction, and each lifting mechanism 300 is positioned above its respective mounting platform 200. A measuring instrument 400 is mounted at the output end of each lifting mechanism 300, and each mounting platform 200 is used to mount a PCB board 2. This configuration allows for the corresponding placement of multiple measuring instruments 400 and multiple PCB boards 2, with a PCB board 2 positioned below each measuring instrument 400. This enables the multiple measuring instruments 400 to separately measure the depth of the holes 21 to be measured on the PCB board 2, thereby improving the efficiency of depth measurement of the holes 21.

[0048] Specifically, each mounting platform 200 can be integrated and connected, with each mounting platform 200 installed at the output end of the horizontal moving device 100. Specifically, each mounting platform 200 is installed at the output end of the first moving mechanism 110, allowing the first moving mechanism 110 and the second moving mechanism 120 to simultaneously drive each mounting platform 200 to move along the first and second paths, respectively, to move the test holes 21 of each PCB board 2 directly below each measuring instrument 400 for measurement. Furthermore, each lifting mechanism 300 can also be configured for synchronous lifting.

[0049] Specifically, each mounting platform 200 can be connected as a whole by means of screw locking, snap-fit, riveting, gluing or welding.

[0050] In some specific embodiments, the depth detection device includes two lifting mechanisms 300 and a mounting platform 200 located below the two lifting mechanisms 300. The two lifting mechanisms 300 are spaced apart along a first direction, and the two mounting platforms 200 are distributed along the first direction and connected as a whole. The distance between the two mounting platforms 200 is equal to the distance between the two lifting mechanisms 300. It is understood that in other embodiments of this application, the number of mounting platforms 200 and lifting mechanisms 300 may be three or more, and each lifting mechanism 300 may be distributed along a second direction, or along both the first and second directions; no single limitation is made here.

[0051] In some embodiments, please refer to Figure 5 The lifting mechanism 300 includes a ball screw mechanism, which has advantages such as high efficiency, high precision, and high rigidity. This not only ensures high lifting accuracy of the measuring instrument 400, improving measurement accuracy, but also ensures smooth lifting of the measuring instrument 400, reducing shaking caused by lifting and thus minimizing damage to the internal structure of the measuring instrument 400. It is understood that in other embodiments of this application, the lifting mechanism 300 may also include a motor module, a screw and nut mechanism, a gear and rack mechanism, a belt drive mechanism, or a chain drive mechanism, etc., and is not limited to any single one.

[0052] In some embodiments, please refer to Figure 1 and Figure 5 The beam plate 720 is also provided with a third guide mechanism 1000. The third guide mechanism 1000 includes a third linear guide rail 1001 and a third slider 1002. The third linear guide rail 1001 is installed on the beam plate 720 and extends along the Z-axis. The third slider 1002 is installed on the measuring instrument 400 and slides on the third linear guide rail 1001, thereby ensuring the smooth sliding of the measuring instrument 400 and reducing the shaking of the measuring instrument 400.

[0053] Optionally, each measuring instrument 400 is provided with two third linear guide rails 1001, which are spaced apart along the first direction. One or more third sliders 1002 are slidably provided on each third linear guide rail 1001, and the measuring instrument 400 is respectively mounted on each third slider 1002.

[0054] In some embodiments, please refer to Figure 5 The beam 720 is also equipped with a limiting structure 1400, which is used to limit the lifting stroke of the measuring instrument 400.

[0055] Specifically, the limiting structure 1400 includes a first baffle 1401 and a second baffle 1402. The first baffle 1401 and the second baffle 1402 are respectively disposed on the beam plate 720 and are spaced apart in the vertical direction. The first baffle 1401 is used to restrict the measuring instrument 400 from moving upward, and the second baffle 1402 is used to restrict the measuring instrument 400 from moving downward.

[0056] In some embodiments, please refer to Figure 1 and Figure 6 The measuring instrument 400 includes a measuring device 410 and a visual positioning device 420. The visual positioning device 420 is used to locate the horizontal position of the hole 21 to be measured, and the measuring device 410 is used to detect the depth of the hole 21 to be measured. Before measuring the hole 21 to be measured by the measuring device 410, the hole 21 to be measured is moved below the measuring device 410 by the horizontal moving device 100. Then, the visual positioning device 420 is used to locate the position of the hole 21 to ensure that the measuring device 410 can detect the hole 21 to be measured. Finally, the depth of the hole 21 to be measured is detected by the measuring device 410.

[0057] Optionally, the visual positioning device 420 includes a camera, which positions the hole 21 to be measured by taking a picture.

[0058] In some embodiments, please refer to Figure 6 The measuring instrument 400 also includes a movable connecting plate 460, which is connected to the lifting mechanism 300. The lifting mechanism 300 can drive the movable connecting plate 460 to move up and down. The visual positioning device 420 and the measuring device 410 are both installed on the movable connecting plate 460.

[0059] In some embodiments, please refer to Figure 6 The visual positioning device 420 is mounted on the movable connecting plate 460 via the second mounting plate 496. A fine-tuning mechanism 440 is connected between the movable connecting plate 460 and the second mounting plate 496. The fine-tuning mechanism 440 is used to adjust the initial position of the visual positioning device 420.

[0060] Specifically, the fine-tuning mechanism 440 includes a trapezoidal lead screw mechanism, which comprises a nut 442, a lead screw 441, and a knob 443. The lead screw 441 is mounted on a movable connecting plate 460, the knob 443 is mounted on one end of the lead screw 441, the nut 442 is mounted on a second mounting plate 496, and the visual positioning device 420 is mounted on the second mounting plate 496. The second mounting plate 496 is provided with a fourth linear guide rail 494, and the movable connecting plate 460 is provided with a fourth slider 495. By rotating the knob 443, the lead screw 441 is rotated, which in turn causes the nut 442 to rise and fall, and the lead screw 441 also causes the second mounting plate 496 and the visual positioning device 420 to rise and fall. The movable connecting plate 460 is also provided with a locking block 444. After the position of the visual positioning device 420 is adjusted, the lead screw 441 can be locked by the locking block 444 to prevent the lead screw 441 from rotating and causing misoperation. The fourth slider 495 and the fourth linear guide rail 494 are provided to guide the sliding of the visual positioning device 420 and prevent the visual positioning device 420 from rotating with the lead screw 441.

[0061] For details, please refer to Figure 6 The fourth slider 495 is mounted on the movable connecting plate 460 via the third mounting plate 497.

[0062] In some embodiments, the measuring instrument 400 is used to emit a surface beam, and the measuring instrument 400 can perform depth measurements on multiple holes 21 to be measured at a time. This configuration improves the measurement efficiency of the measuring instrument 400 on the holes 21 to be measured. Specifically, after the measuring instrument 400 finishes measuring the hole 21 directly below it, the PCB board 2 can be moved along a first direction and / or a second direction by the horizontal moving device 100, so that another part of the PCB board 2 is positioned directly below the measuring instrument 400 for measurement.

[0063] In some embodiments, please refer to Figure 1 The beam slab 720 is equipped with mounting components and multiple connectors 1200. Each connector 1200 is installed on the beam slab 720 and is distributed at intervals along a first direction. The mounting components extend along the first direction and are installed on the side of each connector 1200 away from the beam slab 720. A junction box is installed on the mounting component. The junction box is used to store the cables connecting the controller to each lifting mechanism 300 and measuring instrument 400, so as to avoid the cables being messy and affecting the appearance.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A depth detection device, characterized in that, include: Base; A crossbeam is provided on the base; A horizontal moving device, disposed on the base, is used to output movement along a first direction and a second direction; An installation platform is mounted on the horizontal moving device. The installation platform is used to place a PCB board, and the PCB board has multiple holes to be tested. A lifting mechanism is installed on the crossbeam; A measuring instrument is connected to the lifting mechanism, which is used to drive the measuring instrument to move up and down in the height direction so that the focus of the measuring instrument falls on different depth positions of the hole to be measured, so as to detect the depth of multiple holes to be measured by the measuring instrument.

2. The depth detection device of claim 1, wherein, The horizontal moving device includes a first moving mechanism and a second moving mechanism; the first moving mechanism is used to output movement along a first direction, the second moving mechanism is used to output movement along a second direction, the first moving mechanism is mounted on the second moving mechanism, the mounting platform is mounted on the first moving mechanism, and the first direction and the second direction intersect.

3. The depth detection device of claim 2, wherein, The first moving mechanism includes a mounting base, a first linear guide rail, a first slider, and a first motor module. The first motor module drives the first slider to move on the first linear guide rail. The second moving mechanism includes a second linear guide rail, a second slider, and a second motor module. The second linear guide rail is mounted on the base, the mounting base is connected to the second slider, and the second motor module is used to drive the mounting base to move on the second linear guide rail. The extension directions of the first linear guide and the second linear guide are perpendicular to each other.

4. The depth detection device of any one of claims 1 to 3, wherein, The mounting platform has a bearing surface for supporting the PCB board, and the mounting platform also has a plurality of adsorption holes, one end of each adsorption hole penetrating through the bearing surface, and the other end of each adsorption hole being connected to a vacuum device. The adsorption holes are used to fix the PCB board on the mounting platform.

5. The depth detection device of any one of claims 1 to 3, wherein, The measuring instrument includes a measuring device and a visual positioning device. The visual positioning device is used to locate the position of the hole to be measured, and the measuring device is used to detect the depth of the hole to be measured.

6. The depth detection device of claim 5, wherein, The measuring instrument also includes a movable connecting plate, which is connected to the lifting mechanism. The lifting mechanism can drive the movable connecting plate to move up and down. The measuring device and the visual positioning device are both installed on the movable connecting plate.

7. The depth detection device of any one of claims 1 to 3, wherein, The crossbeam includes a beam plate and at least two raised components, each of which is installed on the base and surrounds the outside of the horizontal moving device; the beam plate is connected between the raised components, and the horizontal moving device is horizontally inserted below the beam plate.

8. The depth detection device of any one of claims 1 to 3, wherein, The depth detection device includes at least two lifting mechanisms and at least two mounting platforms; each lifting mechanism is spaced apart along a first direction and / or a second direction, and each lifting mechanism is respectively located above each mounting platform; the output end of each lifting mechanism is equipped with the measuring instrument, and each mounting platform is used to mount one PCB board.

9. The depth detection device of any one of claims 1 to 3, wherein, The measuring instrument is used to send and receive infrared light to measure the depth of each of the holes to be measured based on the interference signal of the infrared light.

10. A drill-and-measure integrated machining system, comprising: The device includes a machining spindle and a depth detection device as described in any one of claims 1-9, wherein the depth detection device is connected to the machining spindle, the machining spindle is used to perform back drilling on the PCB board, and the depth detection device is used to measure the depth of the hole to be tested after back drilling.

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