Circuit board coating thickness measuring equipment

Abstract

This utility model provides a circuit board coating thickness measuring device, including a conveying assembly for horizontally conveying a circuit board coated with a coating, a reference support and a guide plate limiting part disposed within the horizontal conveying path of the circuit board, the guide plate limiting part being disposed above the reference support part, and an interval space being formed between the guide plate limiting part and the reference support part for allowing the circuit board to move through and for limiting the deformation of the circuit board within a set threshold, and a first thickness detection unit. The first thickness detection unit accurately measures the coating thickness within the set threshold by using the surface reflected light of the coating and the surface reflected light of the circuit board, realizing online operation, fast measurement speed, and high degree of automation.

Description

Technical Field

[0001] This utility model belongs to the field of circuit board coating thickness measurement technology, and particularly relates to circuit board coating thickness measurement equipment. Background Technology

[0002] A coating layer is applied to the surface of the circuit board to protect it. Since the thickness of the coating layer directly affects the quality of the circuit board, it is necessary to test the thickness of the coating layer.

[0003] The current testing method involves manually extracting coated circuit boards and measuring the coating thickness using a testing instrument. This method is not suitable for online operations, is slow, and has a low degree of automation.

[0004] For the reasons mentioned above, there is an urgent need to provide a circuit board coating thickness measurement device that can solve the above problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a circuit board coating thickness measurement device that is online, fast in detection, and highly automated.

[0006] This utility model is implemented as follows: a circuit board coating thickness measuring device, comprising:

[0007] Conveying assembly for horizontally conveying coated circuit boards;

[0008] The reference support is located within the horizontal transport path of the circuit board;

[0009] A guide plate limiting part is arranged parallel above the reference support part, and an interval space is formed between the guide plate limiting part and the reference support part, which allows the circuit board to move through and limits the deformation of the circuit board within a set threshold.

[0010] The first thickness detection unit measures the coating thickness within a set threshold by using surface reflected light from the coating layer and surface reflected light from the circuit board.

[0011] Furthermore, the conveying assembly includes:

[0012] Multiple sequentially spaced and horizontally arranged conveyor rollers and a motor that drives the conveyor rollers to rotate in a set direction and speed;

[0013] The first support has both ends of each of the conveying rollers rotatably mounted on it along their length.

[0014] Preferably, the reference support is located at the middle position between two adjacent conveying rollers.

[0015] Furthermore, a guide surface is provided on one side of the top surface of the reference support for guiding the translated circuit board to transition to the top surface.

[0016] Furthermore, the reference support portion has a vertical opening that penetrates through the reference support portion;

[0017] The circuit board coating thickness measuring device further includes a second thickness detection unit, which is used to detect the coating thickness on the other side of the circuit board. The light source emitted by the second thickness detection unit passes through the opening, and a transparent body for dust prevention is embedded in the opening.

[0018] Furthermore, the circuit board coating thickness measuring device also includes a driving component, which is used to drive the guide plate limiting part to move vertically upward, thereby increasing the distance between the reference support part and the guide plate limiting part, so that undeformed thick circuit boards can pass through the detection or thin circuit boards can skip the detection.

[0019] Furthermore, the circuit board coating thickness measuring device further includes a guide mounting assembly, which includes:

[0020] Mounting bracket for mounting the drive component and the first thickness detection unit;

[0021] At least one guide member is provided for vertically guiding the guide plate limiting part that moves up and down. The guide member includes a guide sleeve vertically disposed on the mounting frame and a guide rod slidably disposed within the guide sleeve. The guide rod is directly or indirectly fixedly connected to the guide plate limiting part.

[0022] Furthermore, the mounting bracket includes a vertically arranged adjusting block and a bearing block vertically connected to the adjusting block. The adjusting block has at least two vertically spaced and symmetrically arranged adjusting ports for adjusting the installation height of the guide plate limiting part.

[0023] Furthermore, the circuit board coating thickness measuring device further includes a mounting assembly for mounting the guide plate limiting portion, the mounting assembly comprising:

[0024] The upper parts of the two ends of the plate along its length are fixedly connected to the lower ends of the two guide rods, respectively.

[0025] Two upright plates are detachably and fixedly connected to the lower ends of both ends of the flat plate along its length.

[0026] A rotating shaft is rotatably connected to the lower ends of the two vertical plates, and the rotating shaft is arranged parallel to the conveying rollers;

[0027] The guide plate limiting part is fixedly sleeved on the rotating shaft.

[0028] Furthermore, the circuit board coating thickness measuring device also includes a second bracket, which includes a crossbeam arranged parallel above the conveyor roller for bearing weight, and the crossbeam is detachably fixedly connected to the mounting frame.

[0029] This utility model provides a circuit board coating thickness measuring device, including a conveying assembly for horizontally conveying a circuit board coated with a coating, a reference support and a guide plate limiting part disposed within the horizontal conveying path of the circuit board, the guide plate limiting part being disposed above the reference support part, and an interval space being formed between the guide plate limiting part and the reference support part for allowing the circuit board to move through and for limiting the deformation of the circuit board within a set threshold, and a first thickness detection unit. The first thickness detection unit accurately measures the coating thickness within the set threshold by using the surface reflected light of the coating and the surface reflected light of the circuit board, realizing online operation, fast measurement speed, and high degree of automation. Attached Figure Description

[0030] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a top view of the circuit board being translated in the circuit board coating thickness measuring device provided in this embodiment of the utility model.

[0032] Figure 2 yes Figure 1 Sectional view along the middle AA.

[0033] Figure 3 yes Figure 2 Enlarged view of point C in the middle.

[0034] Figure 4 This is a perspective view of the guide mounting component 700 and the mounting component 800 cooperating in the circuit board coating thickness measuring device provided in this embodiment of the utility model.

[0035] Figure 5 This is a three-dimensional view of the circuit board translation in the circuit board coating thickness measuring device provided in this embodiment of the utility model.

[0036] Figure 6 yes Figure 5 Enlarged view of point D in the middle.

[0037] Figure 7 This is a top view of the circuit board passing through the space in the circuit board coating thickness measuring device provided in this embodiment of the utility model.

[0038] Figure 8 yes Figure 7 Sectional view at the middle edge BB.

[0039] Figure 9 This is a three-dimensional view of the circuit board passing through the space in the circuit board coating thickness measuring device provided in this embodiment of the utility model.

[0040] Figure 10 This is a schematic diagram of the principle of measuring the coating thickness in the first thickness detection unit of the circuit board coating thickness measuring device provided in this embodiment of the utility model.

[0041] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0042] The reference numerals in the attached figures are explained as follows:

[0043] Circuit board 10, coating layer (11, 11');

[0044] Conveying assembly 100, conveying rollers 110, first support 120;

[0045] The reference support part is 200, the top surface is 210, the guide surface is 220, and the opening is 230.

[0046] Guide plate limiting part 300, two rotating wheels (310, 310');

[0047] First thickness detection unit 400, light source 410, beam splitter 420, dispersive lens 430, confocal aperture 440, spectrometer 450, processing unit 460;

[0048] Second thickness detection unit 500;

[0049] Drive component 600;

[0050] Guide mounting assembly 700, mounting bracket 710, adjusting block 711, bearing block 712, adjusting port 713, guide component 720, guide sleeve 721, guide rod 722;

[0051] Mounting components 800, flat plate 811, upright plate 812, rotating shaft 813;

[0052] The second support is 900, and the crossbeam is 910. Detailed Implementation

[0053] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or state relationship based on the orientation or state relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0054] Furthermore, in addition to indicating location or state relationships, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0055] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0056] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts, which may be the same or different in type and construction, and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0057] To clarify the directional relationships in the diagram, a coordinate system with the vertical direction as the Z-direction and the horizontal plane as the XY-plane is appropriately labeled.

[0058] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0059] Overview of Circuit Board Coating Thickness Measurement Equipment as an Example

[0060] This utility model provides a circuit board coating thickness measuring device, comprising:

[0061] The conveying assembly 100 is used to horizontally convey the circuit board 10 coated with coating layers (11, 11'). In this embodiment, the translation direction is referred to as the X direction in the figure. The coating layers (11, 11') include, but are not limited to, transparent ink or opaque ink.

[0062] The reference support 200 is disposed within the horizontal transport path of the circuit board 10;

[0063] A guide plate limiting part 300 is disposed above the reference support part 200. A space is formed between the guide plate limiting part 300 and the reference support part 200, through which the circuit board 10 can be translatably passed and the deformation of the circuit board 10 is limited to a set threshold. Preferably, the guide plate limiting part 300 is disposed parallel to the reference support part 200 directly above it. The gap distance between the coating layer 11 on the surface of the circuit board 10 and the guide plate limiting part 300 is preferably 10~30μm. This range can limit the deformation of the circuit board 10 to a set threshold and prevent the guide plate limiting part 300 from scratching the coating layer 11 on the surface of the circuit board 10. In this embodiment, the guide plate limiting part 300 includes at least two symmetrically arranged and spaced-apart rotating wheels (310, 310').

[0064] The first thickness detection unit 400 measures the thickness of the coating layer 11 within a set threshold by using the surface reflected light of the coating layer 11 and the surface reflected light of the circuit board 10. In this embodiment, the coating layer 11 is located on the surface of the circuit board 10. The first thickness detection unit 400 is configured to detect the thickness of the coating layer 11 within a set distance range. The distance between the first thickness detection unit 400 and the circuit board 10 is preferably 70~90mm.

[0065] When it is necessary to monitor the thickness change of the coating layer 11 on the circuit board 10 over a larger area, a multi-location detection method can be used to monitor the thickness data at multiple locations simultaneously.

[0066] The conveying assembly 100 provided by this utility model horizontally conveys the circuit board 10 with the coating layer 11 thickness to be tested in real time, which facilitates the first thickness detection unit 400 to accurately measure the coating layer 11 thickness with deformation within a set threshold online. The detection speed is fast and the degree of automation is high.

[0067] Overview of transport components as an example

[0068] Further, the conveying assembly 100 includes:

[0069] Multiple sequentially spaced and horizontally arranged conveyor rollers 110 and a motor (not shown) that drives the conveyor rollers 110 to rotate in a set direction and speed. In this embodiment, the top surface 210 of the reference support 200 is arranged parallel to the conveyor rollers 110 and the two are at the same height, which is beneficial to the parallelism of the circuit board 10 during the translation process.

[0070] The first support 120 has both ends of each conveying roller 110 rotatably mounted on it along its length. (Refer to...) Figure 2 in the Y direction.

[0071] Overview of the benchmark support section as an example

[0072] Preferably, the reference support 200 is located in the middle between two adjacent conveying rollers 110. Since the reference support 200 is close to the detection point, the error amplification effect caused by position deviation when measuring the thickness of the coating layer 11 can be minimized.

[0073] Furthermore, a guide surface 220 is provided on one side of the top surface 210 of the reference support 200 to guide the translated circuit board 10 to transition to the top surface 210. The guide surface 220 is inclined and extends to the top surface 210 so that the circuit board 10 can be smoothly translated from the conveying roller 110 to the support plate 220. In this embodiment, the guide surface 220 is preferably an arc surface, an inclined surface, or a curved surface formed by the combination of an arc surface and an inclined surface, so as to avoid the reference support 200 scratching the coating layer 11' on the other side (i.e. the back side) of the circuit board 10.

[0074] Furthermore, the reference support 200 has a vertical opening 230 that penetrates through the reference support 200;

[0075] The circuit board coating thickness measuring device also includes a second thickness detection unit 500. The second thickness detection unit 500 is used to detect the thickness of the coating 11' on the other side of the circuit board 10. The light source emitted by the second thickness detection unit 500 passes through the opening 230. A transparent body (not shown) for dust prevention is embedded in the opening 230. The transparent body is preferably glass to prevent dust from falling onto the second thickness detection unit 500 and reducing the detection accuracy.

[0076] In this embodiment, the first thickness detection unit 400 and the second thickness detection unit 500 are arranged opposite each other to reduce the number of reference support parts 200 and guide plate limiting parts 300, thereby reducing costs; the first thickness detection unit 400 and the second thickness detection unit 500 simultaneously measure the coating layer (11, 11') thickness on the surface and back of the circuit board 10, thereby improving measurement efficiency.

[0077] Driver Overview as an Example

[0078] Furthermore, the circuit board coating thickness measuring device also includes a driving component 600, which drives the guide plate limiting part 300 to move vertically upward, thereby increasing the distance between the reference support part 200 and the guide plate limiting part 300, so that the undeformed thick circuit board 10 can pass through the detection or the thin circuit board 10 can skip the detection, so as to achieve the purpose of sampling and detecting the thin circuit board 10. In this embodiment, the driving component 600 is preferably a telescopic cylinder.

[0079] Overview of Guided Installation Components as an Example

[0080] Furthermore, the circuit board coating thickness measuring device also includes a guide mounting assembly 700, which comprises:

[0081] Mounting bracket 710 is used to mount drive component 600 and first thickness detection unit 400. Mounting bracket 710 includes vertically arranged adjustment block 711 and bearing block 712 vertically connected to adjustment block 711. Adjustment block 711 has two vertically arranged and symmetrically spaced adjustment openings 713. The adjustment openings 713 are preferably elongated waist-shaped grooves. A screw (not shown) is provided in the adjustment openings 713 for detachably mounting mounting bracket 710 to second bracket 900. The screw is preferably a screw rod. Mounting bracket 710 moves up and down around the screw rod to adjust guide plate limiting part 300 and first thickness detection unit 400 to a predetermined height. Then the screw rod is rotated to fix mounting bracket 710 to second bracket 900.

[0082] At least one guide member 720 is used to vertically guide the guide plate limiting part 300 that moves up and down. The guide member 720 includes a guide sleeve 721 vertically disposed on the mounting frame 710 and a guide rod 722 slidably disposed in the guide sleeve 721. The guide rod 722 is directly or indirectly fixedly connected to the guide plate limiting part 300. In this embodiment, the guide members 720 are preferably two sets and arranged symmetrically at intervals, which has good stability.

[0083] Furthermore, the mounting bracket 710 includes a vertically arranged adjusting block 711 and a bearing block 712 vertically connected to the adjusting block 711. The adjusting block 711 has at least two vertically spaced and symmetrically arranged adjusting ports 713 for adjusting the installation height of the guide plate limiting part 300.

[0084] Overview of installation components as an example

[0085] Furthermore, the circuit board coating thickness measuring device further includes a mounting assembly 800 for mounting the guide plate limiting part 300, the mounting assembly 800 comprising:

[0086] Flat plate 811, its two ends in the length direction (see...) Figure 4 The upper part (in the Y direction) is fixedly connected to the lower ends of the two guide rods 722 respectively;

[0087] Two vertical panels 812, configured for vertical installation (see...) Figure 4 The Z-direction of the plate 811 is detachably fixed to the lower ends of both ends of the plate 811 along its length. In this embodiment, the detachable fixed connection is preferably a threaded connection.

[0088] A rotating shaft 813 is rotatably connected to the lower end of the two vertical plates 812, and the rotating shaft 813 is arranged parallel to the conveying roller 110.

[0089] The guide plate limiting part 300 is fixedly sleeved on the rotating shaft 813. The guide plate limiting part 300 is preferably two rotating wheels that are spaced apart and symmetrically arranged. The guide plate limiting part 300 adopts a rotating structure design, which can reduce the friction between the guide plate limiting part 300 and the circuit board 10, and facilitate the circuit board 10 to pass smoothly through the space.

[0090] Overview of the first thickness detection unit as an example

[0091] In this embodiment, the light source emitted by the first thickness detection unit 400 passes through the space between the two rotating wheels (310, 310'), where the deformation of the circuit board 10 is within a set threshold, which facilitates accurate measurement of the thickness of the coating layer 11.

[0092] Furthermore, the circuit board coating thickness measuring device also includes a second support 900, which includes a crossbeam 910 arranged parallel above the conveyor roller 110 and used to bear the weight. The crossbeam 910 is detachably fixedly connected to the mounting frame 710.

[0093] In this embodiment, the two guide sleeves 721 and the driving member 600 are arranged in a triangle. The triangular structure has strong stability and can improve the stability between the driving member 600, the guide plate limiting part 300 and the two guide rods 722, so that the driving member 600 can smoothly drive the guide plate limiting part 300 to move up and down along the two guide rods 722.

[0094] like Figure 10 As shown, the light source 410 emitted by the first thickness detection unit 400 is preferably a broadband light source. When the light emitted by the light source 410 irradiates the surface of the coating layer 11 and the surface of the circuit board 10, reflections are generated on the surface of the coating layer 11 and the surface of the circuit board 10, respectively. The first thickness detection unit 400 identifies the surface reflected light of the coating layer 11 and the surface reflected light of the circuit board 10 to measure the thickness of the coating layer 11.

[0095] In this embodiment, the first thickness detection unit 400 consists of a light source 410, a beam splitter 420, a dispersive lens 430, a confocal aperture 440, and a spectrometer 450. The light emitted by the light source 410 is incident on the dispersive lens 430 through the beam splitter 420, resulting in spectral dispersion and a continuous wavelength distribution on the outgoing optical axis. That is, light of different wavelengths will be focused at different positions on the optical axis, thus producing positional chromatic aberration. There is a focal point corresponding to the wavelength on the surface of the coating layer 11 to be measured and the surface of the circuit board 10, respectively. The light of different wavelengths focused on the surface of the coating layer 11 to be measured and the surface of the circuit board 10 will be reflected back to the beam splitter 420. Other wavelengths of light are filtered by the confocal aperture 440. After being collected by the spectrometer 450, the accurate peak wavelength information of the surface of the coating layer 11 and the surface of the circuit board 10 is obtained by the processing unit 460, thereby obtaining the position information of the surface of the coating layer 11 and the surface of the circuit board 10, and thus obtaining the thickness of the coating layer 11 to be measured.

[0096] In this embodiment, the second thickness detection unit 500 is used to measure the thickness of the coating layer 11'. Its working principle is the same as that of the first thickness detection unit 400, and will not be described again here.

[0097] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A circuit board coating thickness measuring device, characterized in that, include: Conveying assembly for horizontally conveying coated circuit boards; The reference support is located within the horizontal transport path of the circuit board; A guide plate limiting part is disposed above the reference support part, and an interval space is formed between the guide plate limiting part and the reference support part, which allows the circuit board to move through and limits the deformation of the circuit board within a set threshold. The first thickness detection unit measures the coating thickness within a set threshold by using surface reflected light from the coating layer and surface reflected light from the circuit board.

2. The circuit board coating thickness measuring device according to claim 1, characterized in that, The conveying assembly includes: Multiple sequentially spaced and horizontally arranged conveyor rollers and a motor that drives the conveyor rollers to rotate in a set direction and speed; The first support has both ends of each of the conveying rollers rotatably mounted on it along their length.

3. The circuit board coating thickness measuring device according to claim 2, characterized in that, The reference support is located at the middle position between two adjacent conveying rollers.

4. The circuit board coating thickness measuring device according to claim 2, characterized in that, The top surface of the reference support is provided with a guide surface for guiding the translated circuit board to transition to the top surface.

5. The circuit board coating thickness measuring device according to claim 2, characterized in that, The reference support portion has a vertical opening that penetrates the reference support portion; The circuit board coating thickness measuring device further includes a second thickness detection unit, which is used to detect the coating thickness on the other side of the circuit board. The light source emitted by the second thickness detection unit passes through the opening, and a transparent body for dust prevention is embedded in the opening.

6. The circuit board coating thickness measuring device according to claim 5, characterized in that, It also includes a driving component, which drives the guide plate limiting portion to move vertically upward, thereby increasing the distance between the reference support portion and the guide plate limiting portion, so that undeformed thick circuit boards can pass through the detection or thin circuit boards can skip the detection.

7. The circuit board coating thickness measuring device according to claim 6, characterized in that, It also includes a guide installation component, the guide installation component comprising: Mounting bracket for mounting the drive component and the first thickness detection unit; At least one guide member is provided for vertically guiding the guide plate limiting part that moves up and down. The guide member includes a guide sleeve vertically disposed on the mounting frame and a guide rod slidably disposed within the guide sleeve. The guide rod is directly or indirectly fixedly connected to the guide plate limiting part.

8. The circuit board coating thickness measuring device according to claim 7, characterized in that, The mounting bracket includes a vertically arranged adjustment block and a support block vertically connected to the adjustment block. The adjustment block has at least two vertically spaced and symmetrically arranged adjustment ports for adjusting the installation height of the guide plate limiting part.

9. The circuit board coating thickness measuring device according to claim 7, characterized in that, It also includes a mounting assembly for mounting the guide plate limiting portion, the mounting assembly comprising: The upper parts of the two ends of the plate along its length are fixedly connected to the lower ends of the two guide rods, respectively. Two upright plates are detachably and fixedly connected to the lower ends of both ends of the flat plate along its length. A rotating shaft is rotatably connected to the lower ends of the two vertical plates, and the rotating shaft is arranged parallel to the conveying rollers; The guide plate limiting part is fixedly sleeved on the rotating shaft.

10. The circuit board coating thickness measuring device according to claim 7, characterized in that, It also includes a second bracket, which includes a crossbeam arranged parallel above the conveyor roller for bearing weight, and the crossbeam is detachably fixedly connected to the mounting frame.

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