Online appearance detector for PCB (Printed Circuit Board)

Abstract

The utility model provides a PCB on-line appearance detection machine. The PCB on-line appearance detection machine comprises a base box, a conveying platform, a front face detection device, a back face detection device and a back face adsorption conveying device. According to the utility model, materials are placed and conveyed on a plane through the conveying platform; the front face detection device detects the materials located at the front face detection position. The back face detection device detects the bottom face of the material located at the back face detection position. And the back adsorption conveying device is used for adsorbing and grabbing the top surface of the material and conveying the top surface of the material from the first conveying device to the second conveying device, so that the back detection device can detect the bottom surface of the material. The reverse side adsorption conveying device adsorbs, grabs and conveys the materials, the materials cannot fall or slide, pause and waiting for operation of a mechanical arm are not needed, and therefore the conveying efficiency can be greatly improved; and an adsorption mode is adopted, so that materials are almost not in direct contact with a machine, and the problem of material damage is avoided.

Description

Technical Field

[0001] The utility model relates to the field of electronic device testing equipment, in particular to a PCB online appearance testing machine. Background Art

[0002] With the development of electronic technology and manufacturing technology, the automated production of PCB boards is also very important. In the production process of PCB boards, the back of the PCB boards needs to be inspected.

[0003] Traditional PCB board inspection equipment may only be able to inspect part of the surface. For example, most inspection equipment can only take photos of one side of the PCB board for inspection, and then manually collect the inspected materials in batches and turn them over for inspection. The equipment cannot continuously inspect both sides of the PCB board, requiring a lot of manual intervention and operation, and the inspection efficiency is low.

[0004] Therefore, it is necessary to provide a PCB online appearance inspection machine to solve the above technical problems. Utility Model Content

[0005] The utility model provides a PCB online appearance inspection machine to solve the problem that the equipment in the prior art cannot continuously inspect the front and back sides of a PCB board and requires a large amount of manual intervention and operation.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a PCB online appearance inspection machine, which includes:

[0007] Base box;

[0008] A conveying platform is arranged on the base box, the conveying platform comprises a first conveying device and a second conveying device in the same conveying direction, a loading position, a back detection position and a front detection position are arranged on the conveying platform, the loading position is on the first conveying device, the back detection position is between the first conveying device and the second conveying device, and the front detection position is on the second conveying device;

[0009] A loading detection device connected to the base box, the loading detection device is used to detect the material passing through the loading position;

[0010] A back-side adsorption conveying device is located above the first conveying device and the second conveying device, and the back-side adsorption conveying device is located above the back-side detection position, and the back-side adsorption conveying device is used to adsorb and grasp the top surface of the material and convey the material from the first conveying device to the second conveying device;

[0011] a back detection device, located between the first conveying device and the second conveying device, the back detection device detects the material at the back detection position, and the back detection device is used to detect the bottom surface of the material; and

[0012] A front detection device is connected to the base box, and the front detection device takes photos to detect the material located at the front detection position.

[0013] In the utility model, the reverse side adsorption and conveying device comprises:

[0014] a support frame connected to the base box; and

[0015] A belt adsorption mechanism is connected to the support frame, and the belt adsorption mechanism is located above the first conveying device and the second conveying device. The belt adsorption mechanism is used to absorb, grasp and transport the material.

[0016] In the utility model, the belt adsorption mechanism comprises:

[0017] A belt connecting plate connected to the supporting frame;

[0018] A roller assembly connected to the belt connecting plate;

[0019] A scanning belt is sleeved on the roller assembly, the roller assembly drives the scanning belt to rotate, and the scanning belt is provided with air holes;

[0020] A belt support plate is located below the roller assembly, the belt support plate is connected to the belt connecting plate, the bottom surface of the belt support plate is in contact with the inner ring of the scanning belt, an air delivery hole is provided at the bottom end of the belt support plate, and one end of the air delivery hole is connected to the air vent; and

[0021] A confluence component is arranged on the belt connecting plate, and the confluence component is externally connected to an air suction device. The confluence component is connected to the other end of the air delivery hole, and the confluence component is used to absorb and grab the material through the air hole.

[0022] In the utility model, the roller assembly comprises:

[0023] A driving shaft is located at one side of the belt support plate, the driving shaft is rotatably connected to the belt connecting plate, the outer peripheral side of the driving shaft is in contact with one side of the inner ring of the scanning belt, and the driving shaft drives the scanning belt to rotate;

[0024] A rotating motor is arranged on the belt connecting plate, and the rotating motor drives the driving shaft to rotate;

[0025] A driven shaft is located at the other side of the belt support plate, the driven shaft is rotatably connected to the belt connecting plate, the outer side of the driven shaft is in contact with the other side of the inner ring of the scanning belt, and the driven shaft is rotatably connected to the scanning belt; and

[0026] A tensioning shaft is located above the belt supporting plate. The tensioning shaft is rotatably connected to the belt connecting plate. The outer peripheral side of the tensioning shaft is in contact with the inner ring of the scanning belt to tension the scanning belt.

[0027] In the utility model, the reverse side adsorption conveying device comprises a lifting mechanism, the lifting mechanism is arranged on the supporting frame, the lifting mechanism is connected with the belt adsorption mechanism, and the lifting mechanism drives the belt adsorption mechanism to move up and down.

[0028] In the utility model, the lifting mechanism comprises:

[0029] A lifting drive member is arranged on the support frame, the bottom end of the lifting drive member is connected to the belt adsorption mechanism, and the lifting drive member drives the belt adsorption mechanism to move up and down;

[0030] The counterweight assembly is provided in two groups, and the two groups of the counterweight assembly are relatively arranged on both sides of the support frame.

[0031] In the utility model, the counterweight assembly comprises:

[0032] A counterweight block is located outside the support frame;

[0033] a fixed pulley, rotatably disposed on the support frame; and

[0034] A steel wire rope is laid on the fixed pulley, one end of the steel wire rope is connected to the counterweight block, and the other end of the steel wire rope is connected to the belt adsorption mechanism.

[0035] In the utility model, a thickness measuring device is arranged on the first conveying device, and the thickness measuring device is arranged on the base box, and the thickness measuring device is used to detect the thickness of the material.

[0036] In the utility model, the thickness measuring device comprises:

[0037] A roller shaft seat is arranged on the base box, and the roller shaft seat is provided with a rotating bearing for sliding along the vertical direction;

[0038] A pressing wheel, located above the thickness measuring position, wherein the end of the pressing wheel is rotatably connected to the rotating bearing;

[0039] A mounting base connected to the base box; and

[0040] A distance measuring sensor is connected to the mounting base, and the distance measuring sensor is located above the pressing wheel. The distance measuring sensor is used to detect the moving distance of the pressing wheel, so as to obtain the thickness of the material.

[0041] In the utility model, the thickness measuring device also includes:

[0042] A guide pressure plate connected to the mounting seat, the guide pressure plate is located at a side away from the pressure wheel, and the distance between the bottom surface of the guide pressure plate away from the pressure wheel and the plane where the first conveying device is located gradually increases;

[0043] A linear bearing is vertically arranged on the mounting seat, and the guide pressure plate is slidably connected to the mounting seat through the linear bearing; and

[0044] A sensor is connected to the mounting seat, and the sensor is used to detect the position of the guide pressure plate.

[0045] Compared with the prior art, the utility model has the following beneficial effects: a PCB online appearance inspection machine of the utility model places and conveys the material plane by setting a first conveying device and a second conveying device on the conveying platform; the front detection device detects the material located at the front detection position. The back detection device detects the bottom surface of the material located at the back detection position. The back adsorption and conveying device is used to adsorb and grab the top surface of the material, and convey it from the first conveying device to the second conveying device, so that the back detection device can detect the bottom surface of the material. The back adsorption and conveying device adsorbs and grabs the material and conveys it, and the material will not fall or slip, and there is no need to pause and wait for the robot to operate, thereby greatly improving the conveying efficiency. The equipment can realize the automated PCB board conveying and inspection process; the back detection device and the front detection device can simultaneously inspect the back and front of the PCB board, reducing the steps of manual operation and improving the efficiency of equipment inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the utility model.

[0047] Figure 1 The figure is a schematic diagram of the overall structure of a PCB online appearance inspection machine according to a preferred embodiment of the utility model.

[0048] Figure 2 It is a schematic diagram of the partial structure of a PCB online appearance inspection machine according to a preferred embodiment of the utility model.

[0049] Figure 3 The thickness measuring device of the preferred embodiment of the utility model is three-dimensional Figure 1.

[0050] Figure 4 The thickness measuring device of the preferred embodiment of the utility model is three-dimensional Figure 2 .

[0051] Figure 5 This is a cross-sectional view of a thickness measuring device according to a preferred embodiment of the present utility model.

[0052] Figure 6 This is a partial structural cross-sectional view of a PCB online appearance inspection machine according to a preferred embodiment of the utility model.

[0053] Figure 7 It is a three-dimensional diagram of the reverse adsorption and conveying device of the preferred embodiment of the utility model.

[0054] Figure 8 It is a cross-sectional view of the reverse adsorption and conveying device of the preferred embodiment of the utility model.

[0055] Fig. 9 for Figure 8 A magnified view of the structure at A.

[0056] Fig.10 This is a bottom view of a belt support plate according to a preferred embodiment of the present utility model.

[0057] Fig.11 It is a side view of the reverse assembly of the encoder according to the preferred embodiment of the present utility model.

[0058] Fig.12 This is a front view of the reverse assembly of the encoder according to the preferred embodiment of the present utility model.

[0059] Reference numerals: 1, base box; 2, conveying platform; 21, first conveying device; 22, second conveying device; 23, integration device; 231, first fixing plate; 232, integration bracket; 233, second guide rail; 234, second fixing plate; 235, integration drive assembly; 24, thickness measuring device; 241, roller shaft seat; 2411, slide groove; 242, mounting seat; 243, pressure wheel; 244, distance measuring sensor; 245, guide pressure plate; 2451, fixed Fixed part; 2452, supporting part; 2453, guiding part; 2454, first fixing hole; 246, rotating bearing; 247, linear bearing; 248, sensor; 25, feeding detection device; 26, positioning device; 3, front detection device; 4, back detection device; 5, back adsorption conveying device; 51, supporting frame; 52, belt adsorption mechanism; 521, belt connecting plate; 5211, first adjustment hole; 522, roller assembly; 5221, driving shaft ; 5222, rotating motor; 5223, driven shaft; 5224, tensioning shaft; 5225, tensioning seat; 523, scanning belt; 5231, air vent; 524, belt support plate; 5241, air delivery hole; 5241a, first row of air delivery holes; 5241b, second row of air delivery holes; 5241c, third row of air delivery holes; 5242, confluence channel; 525, confluence assembly; 526, feed guide plate; 527, encoder reverse assembly; 5271, encoder Encoder connecting block; 5272, first guide rail; 5273, encoder fixing block; 5274, encoder body; 5275, first limit block; 5276, first elastic member; 5277, second guide column; 53, lifting mechanism; 531, lifting drive member; 532, counterweight assembly; 5321, counterweight block; 5322, fixed pulley; 5323, wire rope; 5324, guide column connecting plate; 5325, first guide column; 5326, weight-reducing linear bearing. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0061] Directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used for reference to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention, and are not used to limit the present invention.

[0062] The words "first", "second" and the like in the terminology of the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be construed as limiting the order of precedence.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] The following is a preferred embodiment of a PCB online appearance inspection machine provided by the utility model that can solve the above technical problems.

[0065] Please refer to Figure 1 , Figure 2 and Figure 3 ,in Figure 1 This is a schematic diagram of the overall structure of a PCB online appearance inspection machine according to a preferred embodiment of the utility model. Figure 2 It is a schematic diagram of the partial structure of a PCB online appearance inspection machine according to a preferred embodiment of the utility model.

[0066] In the figures, structurally similar elements are denoted by the same reference numerals.

[0067] The utility model provides a PCB online appearance inspection machine, which comprises a base box 1, a conveying platform 2, a front inspection device 3, a back inspection device 4 and a back adsorption and conveying device 5. The conveying platform 2 is arranged on the base box 1, and the conveying platform 2 includes a first conveying device 21 and a second conveying device 22 with the same conveying direction. The conveying platform 2 is provided with a loading position, a back detection position and a front detection position. The loading position is on the first conveying device 21, the back detection position is between the first conveying device 21 and the second conveying device 22, and the front detection position is on the second conveying device 22; the back adsorption conveying device 5 is located above the first conveying device 21 and the second conveying device 22, and the back adsorption conveying device 5 is located above the back detection position. The back adsorption conveying device 5 is used to adsorb and grasp the top surface of the material and convey the material from the first conveying device 21 to the second conveying device 22; the back detection device 4 is located between the first conveying device 21 and the second conveying device 22, and the back detection device 4 detects the bottom surface of the material at the back detection position; the front detection device 3 is connected to the base box 1, and the front detection device 3 detects the material located at the front detection position.

[0068] The PCB online appearance inspection machine in this embodiment places and conveys the material plane by setting the first conveying device 21 and the second conveying device 22 on the conveying platform 2 to ensure material transportation; the back-side adsorption conveying device 5 can adsorb and grab the top surface of the material, and convey the material from the first conveying device 21 to the second conveying device 22, so that the back-side inspection device 4 can inspect the bottom surface of the material. The back-side adsorption conveying device 5 grabs the material by adsorption and conveys it to ensure that the material does not fall or slip. The equipment can realize the automated PCB board conveying and inspection process, and can inspect the back and front of the PCB board at the same time, reducing the steps of manual operation and improving the efficiency of equipment inspection.

[0069] The structure on the conveying platform 2 in this embodiment is described as follows:

[0070] Combination Figure 1 and Figure 2 In this embodiment, the conveying platform 2 is arranged on the base box 1, and the conveying platform 2 is used to convey materials. The conveying platform 2 is sequentially provided with a loading position, an integration position, a thickness measurement position, a back detection position, and a front detection position; a loading detection device 25 is arranged on the base box 1, and the loading detection device 25 is used to detect that the material passes through the loading position. The conveying platform 2 includes a first conveying device 21 and a second conveying device 22 with the same conveying direction. The loading position, the integration position, and the thickness measurement position are sequentially arranged on the first conveying device 21, the back detection position is between the first conveying device 21 and the second conveying device 22, and the front detection position is on the second conveying device 22.

[0071] The first conveyor 21 is provided with a loading detection device 25, which is arranged on the base box 1 and is used to detect whether the material passes through the loading position; the thickness measuring device 24 is arranged on the base box 1 and is used to detect the thickness of the material. The front detection device 3 is connected to the base box 1 and performs photo detection on the material at the photo detection position.

[0072] The utility model provides a PCB online appearance inspection machine, which transmits materials through a first conveying device 21, and a loading detection device 25 can automatically detect the materials passing through the loading position, and locate the materials to be placed on the first conveying device 21; the integration device 23 can align and integrate the materials at the integration position, so that the materials are arranged neatly, which is convenient for subsequent material inspection. The thickness measuring device 24 can accurately measure the thickness of the materials to ensure that the material quality meets the standards; the entire PCB online appearance inspection machine is simple to operate and has a compact structure and layout. Through automation and precise measurement, the time and error of manual operation are reduced, and the production quality of materials can be greatly improved.

[0073] Combination Figure 2 , the integration device 23 in this embodiment is described in detail:

[0074] The integration device 23 in this embodiment includes a first fixed plate 231, an integration bracket 232, a second fixed plate 234 and an integration drive assembly 235; the first fixed plate 231 is located on one side of the first conveying device 21, the first fixed plate 231 is connected to the base box 1, and the first fixed plate 231 is used to limit the position of one end of the material; the integration bracket 232 is connected to the base box 1, and a second guide rail 233 is provided on the integration bracket 232, and the projection of the straight line where the long side extension direction of the second guide rail 233 is located is perpendicular to the straight line where the conveying direction of the first conveying device 21 is located; the second fixed plate 234 is located above the first conveying device 21, the second fixed plate 234 is arranged opposite to the first fixed plate 231, and the second fixed plate 234 is slidably connected to the second guide rail 233; the integration drive assembly 235 is connected to the integration bracket 232, the integration drive assembly 235 is connected to the second fixed plate 234, and the integration drive assembly 235 drives the second fixed plate 234 to move relative to the first fixed plate 231, so as to align and integrate the materials, which is convenient for subsequent material detection.

[0075] The structure of the thickness measuring device 24 in this embodiment is described as follows:

[0076] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5 The thickness measuring device 24 in this embodiment includes a roller shaft seat 241, a pressure wheel 243, a mounting seat 242 and a distance measuring sensor 244; the roller shaft seat 241 is arranged on the base box 1, and the roller shaft seat 241 is provided with a rotating bearing 246 sliding along the vertical direction; the roller shaft seat 241 in this embodiment is provided with a vertically extending second slide groove 2411 on the inner side, and the rotating bearing 246 is movably arranged in the second slide groove 2411.

[0077] The pressing wheel 243 is located above the thickness measuring position, and the end of the pressing wheel 243 is rotatably connected to the rotating bearing 246; the mounting seat 242 is connected to the base box 1; the distance measuring sensor 244 is connected to the mounting seat 242, and the distance measuring sensor 244 is located above the pressing wheel 243. The distance measuring sensor 244 is used to detect the moving distance of the pressing wheel 243, so as to obtain the thickness of the material.

[0078] In this embodiment, the movement trajectory of the pressure wheel 243 along the vertical direction includes a first initial position and a first fixed position, and the first fixed position is above the first initial position; when the pressure wheel 243 is located at the first initial position, there is no material between the pressure wheel 243 and the first conveying device 21; when the pressure wheel 243 is located at the first fixed position, the pressure wheel 243 and the first conveying device 21 rotate relative to each other to convey the material, and the pressure wheel 243 is located above the material; the distance between the pressure wheel 243 at the first fixed position and the first initial position is detected by the distance measuring sensor 244, thereby obtaining the thickness of the material.

[0079] The end of the pressing wheel 243 is rotatably connected to the rotating bearing 246. The rotation of the rotating bearing 246 ensures that the material can be conveyed. The distance between the first fixed position and the first initial position of the pressing wheel 243 is detected by the distance measuring sensor 244, and the thickness of the material can be obtained; the thickness measuring device 24 measures the thickness of the material, which can better control the production process and product quality, and improve production efficiency and product consistency.

[0080] Combination Figure 4 and Figure 5 In this embodiment, the thickness measuring device 24 further includes a guide platen 245, which is located on the side of the pressing wheel 243 close to the feeding detection device 25, and is connected to the mounting seat 242; the distance between the bottom surface of the guide platen 245 away from the pressing wheel 243 and the first conveying device 21 gradually increases, and the guide platen 245 guides the material on the first conveying device 21 to the bottom of the pressing wheel 243, which is convenient for subsequent material thickness detection. The guide platen 245 is located on the side of the pressing wheel 243 close to the feeding detection device 25, and can guide the material on the first conveying device 21 to stably convey it to the bottom of the pressing wheel 243, avoid material deviation or looseness, and ensure the accuracy and consistency of measurement.

[0081] The guide pressure plate 245 includes a fixed portion 2451, a supporting portion 2452 and a guiding portion 2453. The fixed portion 2451 is connected to the mounting seat 242, so that the guide pressure plate 245 is installed above the pressure wheel 243; the supporting portion 2452 is arranged in the middle of the guide pressure plate 245, and the supporting portion 2452 is parallel to the plane where the first conveying device 21 is located, and the supporting portion 2452 is used to limit the height of the material to ensure the flatness of the material during transportation; the guiding portion 2453 is arranged on the side of the supporting portion 2452 away from the fixed portion 2451, and the end of the guiding portion 2453 away from the fixed portion 2451 is inclined upward, and the guiding portion 2453 guides the material to the bottom end of the supporting portion 2452, ensuring that the material correctly enters the area of ​​the pressure wheel 243 during the conveying process, avoiding deviation or accumulation, and further improving the stability and accuracy of the measurement.

[0082] In this embodiment, a linear bearing 247 is vertically arranged on the mounting seat 242, and the guide platen 245 is connected to the mounting seat 242 through the linear bearing 247; the thickness measuring device 24 also includes a sensor 248, which is connected to the mounting seat 242, and the sensor 248 is used to detect the position of the guide platen 245. When the material is stuck between the first conveying device 21 and the guide platen 245, the material will push up the guide platen 245. When the guide platen 245 slides upward along the linear bearing 247, the sensor 248 detects that the guide platen 245 is pushed up, and the sensor 248 sends an alarm to the controller.

[0083] In this embodiment, a first fixing hole 2454 is provided on the fixing portion 2451, and the first fixing hole 2454 is a long strip structure; a first mounting hole is provided on the linear bearing 247, and the first fixing hole 2454 is adjustably connected to the first mounting hole by screws. This structure allows the height of the guide pressure plate 245 to be adjusted according to materials of different thicknesses, thereby improving the practicality of the structure.

[0084] In addition, the sensor 248 in this embodiment is connected to the mounting base 242 in an adjustable manner up and down, thereby improving the practicality of the structure.

[0085] The thickness measuring device 24 detects the position of the guide plate 245 by installing a sensor 248, and can timely detect the lifting of the guide plate 245 when the material is stuck between the first conveying device 21 and the guide plate 245. In this way, the conveying state of the material can be monitored in real time to avoid material jam or abnormality.

[0086] Combination Figure 3 The PCB online appearance inspection machine in this embodiment further includes a positioning device 26. A second detection position is also provided on the first conveying device 21. The second detection position is located between the thickness measurement position and the first unloading position. The positioning device 26 is connected to the base box 1. The positioning device 26 determines the unloading time of the material based on the position of the material at the second detection position; the device determines the detection time of the material by the back detection device 4 based on the position of the material detected by the positioning device 26.

[0087] The structure of the reverse adsorption conveying device 5 in this embodiment is described as follows:

[0088] Combination Figure 1 and Figure 6 The back side adsorption conveying device 5 is connected to the base box 1, and is located above the first conveying device 21 and the second conveying device 22, and is located above the back side detection device 4. The back side adsorption conveying device 5 is used to adsorb and grasp the top surface of the material, and convey the material from the first conveying device 21 to the second conveying device 22.

[0089] The reverse adsorption conveying device 5 in this embodiment includes a support frame 51 and a belt adsorption mechanism 52; the support frame 51 is connected to the base box 1; the belt adsorption mechanism 52 is connected to the support frame 51, and the belt adsorption mechanism 52 is located above the first conveying device 21 and the second conveying device 22, and the belt adsorption mechanism 52 is used to grab materials and convey them.

[0090] The reverse adsorption conveying device 5 is connected to the base box 1 through the support frame 51, which ensures the stability and safety of the reverse adsorption conveying device 5; the belt adsorption mechanism 52 can stably grab and convey the material to ensure that the material will not fall or slip. Compared with the traditional robot grabbing PCB board conveying, the belt adsorption mechanism 52 can continuously and stably grab and convey the PCB board without pausing to wait for the robot operation, thereby greatly improving the conveying efficiency. The grabbing of the traditional robot often causes scratches, collisions and other damages to the surface of the PCB board, while the belt adsorption mechanism 52 adopts an adsorption method, and there is almost no direct contact between the material and the machine, avoiding the problem of material damage. Since the belt adsorption mechanism 52 adopts a belt conveying method, it can evenly share the weight of the material and reduce the impact of uneven force on the PCB board, thereby improving the stability of the conveying.

[0091] The belt adsorption mechanism 52 in this embodiment is described in detail as follows:

[0092] Combination Figure 7 and Figure 8 The belt adsorption mechanism 52 includes a belt connecting plate 521, a roller assembly 522, a scanning belt 523, a belt support plate 524 and a confluence assembly 525; the belt connecting plate 521 is connected to the support frame 51; the roller assembly 522 is connected to the belt connecting plate 521; the scanning belt 523 is sleeved on the roller assembly 522, and the roller assembly 522 drives the scanning belt 523 to rotate, and the scanning belt 523 is provided with a ventilation hole 5231; the belt support plate 524 is located below the roller assembly 522 The belt support plate 524 is connected to the belt connecting plate 521, the bottom surface of the belt support plate 524 is in contact with the inner circle of the scanning belt 523, and an air hole 5241 is provided at the bottom end of the belt support plate 524, and one end of the air hole 5241 is connected to the air hole 5231; the confluence component 525 is arranged on the belt connecting plate 521, and the confluence component 525 is externally connected to the suction equipment, and the confluence component 525 is connected to the other end of the air hole 5241, and the confluence component 525 is used to absorb and grab the material through the air hole 5231.

[0093] The belt support plate 524 is located below the roller assembly 522. The bottom surface of the belt support plate 524 fits with the inner circle of the scanning belt 523. Through the contact with the scanning belt 523, the scanning belt 523 can absorb and fix the material in a plane. Through the air holes 5231 on the scanning belt 523, the material can be adsorbed, so that a stable adsorption force is formed between the material and the belt, thereby preventing the material from sliding or falling, and the adsorption stability during the transportation process is greatly improved. The confluence assembly 525 is connected to the belt connecting plate 521 and connected to the suction device. The scanning belt 523 is provided with air holes 5231. Through the connection between the air holes 5231 and the air delivery holes 5241, the material is adsorbed and grasped through the air holes 5231. This structure realizes the operation of automatic adsorption and transportation of materials, and improves the efficiency of handling and transportation.

[0094] Combination Fig. 9 The air delivery holes 5241 and the air vents 5231 are each provided with a plurality of groups, and a single air delivery hole 5241 corresponds to and covers at least two air vents 5231 on the scanning belt 523. In this embodiment, the plurality of groups of air delivery holes 5241 are respectively provided with a plurality of rows, and each row of air delivery holes is connected through a confluence channel 5242.

[0095] In this embodiment, the four air holes 5231 form a group of air holes 5231, a single air supply hole 5241 corresponds to the single group of air holes 5231, and a single air supply hole 5241 covers four air holes 5231, thereby ensuring that during the operation of the scanning belt 523, three air holes 5231 have suction each time.

[0096] like Fig.10As shown, several groups of gas holes 5241 are arranged in three rows, which are respectively a first row of gas holes 5241a, a second row of gas holes 5241b and a third row of gas holes 5241c. The first row of gas holes 5241a and the third row of gas holes 5241c are relatively arranged on both sides of the second row of gas holes 5241b, and the gas hole density of the first row of gas holes 5241a and the gas hole density of the third row of gas holes 5241c are both smaller than the gas hole density of the second row of gas holes 5241b. In this embodiment, the first row of air holes 5241a is used to adsorb the material, and the first row of air holes 5241a is correspondingly arranged above the first conveying device 21; the second row of air holes 5241b is used to adsorb and flatten the material, which is convenient for the photo detection of the back detection device 4 and improves the accuracy of the material detection results; the third row of air holes 5241c is located above the back detection position, and the third row of air holes 5241c adsorbs the material, and the third row of air holes 5241c is correspondingly arranged above the second conveying device 22; wherein the suction force of the first row of air holes 5241a and the third row of air holes 5241c are both smaller than that of the second row of air holes 5241b, and the suction force of the first row of air holes 5241a and the third row of air holes 5241c is sufficient for material transportation, the structural design is streamlined, and production costs are saved.

[0097] The roller assembly 522 in this embodiment is described as follows:

[0098] Combination Figure 7 and Figure 8 The roller assembly 522 in this embodiment includes a driving shaft 5221, a rotating motor 5222, a driven shaft 5223 and a tensioning shaft 5224; the driving shaft 5221 is located on one side of the belt support plate 524, the driving shaft 5221 is rotatably connected to the belt connecting plate 521, the outer peripheral side of the driving shaft 5221 is in contact with one side of the inner ring of the scanning belt 523, and the driving shaft 5221 drives the scanning belt 523 to rotate; the driven shaft 5223 is located on the other side of the belt support plate 524, the driven shaft 5223 is connected to the belt connecting plate 5 21 rotationally connected, the outer side of the driven shaft 5223 is in contact with the other side of the inner ring of the scanning belt 523, and the driven shaft 5223 is rotationally connected to the scanning belt 523; the rotating motor 5222 is arranged on the belt connecting plate 521, and the rotating motor 5222 drives the driving shaft 5221 to rotate; the tensioning shaft 5224 is located above the belt supporting plate 524, the tensioning shaft 5224 is rotationally connected to the belt connecting plate 521, and the outer peripheral side of the tensioning shaft 5224 is in contact with the inner ring of the scanning belt 523, so as to tighten the scanning belt 523.

[0099] The driving shaft 5221 and the driven shaft 5223 respectively rotate in close contact with the inner ring of the scanning belt 523. The driving shaft 5221 is driven by the rotating motor 5222 to drive the scanning belt 523, thereby ensuring the continuous and stable operation of the scanning belt 523. The tensioning shaft 5224 is located above the belt support plate 524 and is rotatably connected to the belt connecting plate 521. The tensioning shaft 5224 controls the tensioning of the scanning belt 523 to prevent the belt from being loosened or disengaged during operation, thereby ensuring the stability and reliability of the conveying. A good fit between the belt and the scanning belt 523 is achieved. In this way, the friction between the belt and the scanning belt 523 can be reduced, the energy loss can be reduced, and the conveying can be kept smooth and stable.

[0100] The roller assembly 522 also includes a tensioning seat 5225, which is connected to the belt connecting plate 521. The tensioning seat 5225 is located on the outer side of the belt connecting plate 521. The belt connecting plate 521 in this embodiment is provided with a first adjustment hole 5211, which is a vertically arranged long strip structure. The tensioning shaft 5224 passes through the first adjustment hole 5211 and is connected to the tensioning seat 5225. Two tensioning seats 5225 are provided, and the two tensioning seats 5225 are respectively rotatably connected to the two ends of the tensioning shaft 5224; the belt connecting plate 521 is provided with a second adjustment hole, and the second adjustment hole is provided with a plurality of groups, and the plurality of groups of second adjustment holes are arranged vertically, and the second adjustment holes are detachably connected to the tensioning seat 5225. The belt connecting plate 521 is provided with a plurality of groups of second adjustment holes, which are arranged vertically and detachably connected to the tensioning seat 5225. In this way, a suitable second adjustment hole can be selected according to actual needs to be connected to the tensioning seat 5225, so that the height of the tensioning shaft 5224 can be adjusted, the tightness and tension of the scanning belt 523 can be fine-tuned, and the structure has adjustable flexibility.

[0101] Combination Figure 7 The belt adsorption mechanism 52 also includes a feed guide plate 526, which is connected to the belt connecting plate 521 and is located on the side of the belt connecting plate 521 close to the first conveying device 21. The distance between the end of the feed guide plate 526 away from the scanning belt 523 and the plane where the first conveying device 21 is located is getting larger and larger; this structural design gradually guides the material to move in the desired direction, ensures the smooth transportation of the material, and improves the efficiency and stability of the entire device.

[0102] Combination Figure 7 , Fig.11 and Fig.12In this embodiment, the belt adsorption mechanism 52 also includes an encoder reverse component 527, which is connected to the belt connecting plate 521, and the encoder reverse component 527 is used to detect the stroke of the scanning belt 523; through the device of the encoder reverse component 527, the position and movement of the scanning belt 523 can be monitored in real time to ensure that the equipment can accurately control and adjust the operating status of the scanning belt 523.

[0103] The encoder reverse component 527 includes an encoder connecting block 5271, an encoder fixing block 5273, an encoder body 5274, a first limit block 5275 and a first elastic member 5276; wherein the encoder connecting block 5271 is connected to the belt connecting plate 521, and a first guide rail 5272 is arranged on one side of the encoder connecting block 5271, and the straight line where the long side of the first guide rail 5272 is located is perpendicular to the plane where the bottom surface of the scanning belt 523 is located; the encoder fixing block 5273 is slidably connected to the first guide rail 5272; the setting of the encoder connecting block 5271 and the first guide rail 5272 enables the encoder reverse component 527 to maintain a stable moving trajectory and remain perpendicular to the bottom surface of the scanning belt 523; it ensures that the encoder can stably and accurately measure when detecting the stroke of the scanning belt 523, thereby improving the precision and accuracy of the measurement.

[0104] The encoder body 5274 is rotatably connected to the encoder fixing block 5273. The encoder body 5274 includes an encoder pressure wheel, which fits the bottom surface of the scanning belt 523 to ensure effective contact between the encoder and the scanning belt 523, thereby improving the accuracy and reliability of stroke detection.

[0105] The first limit block 5275 is located at the bottom of the first guide rail 5272, and the first limit block 5275 is connected to the encoder connection block 5271; the first elastic member 5276 is arranged between the encoder fixing block 5273 and the first limit block 5275, and the first elastic member 5276 elastically squeezes the encoder fixing block 5273, so that the encoder pressure wheel fits closely with the bottom surface of the scanning belt 523 by elastically squeezing the encoder fixing block 5273, and the encoder pressure wheel always maintains good contact with the scanning belt 523, ensuring accurate stroke detection.

[0106] Furthermore, a first sliding groove is provided at the bottom end of the encoder fixing block 5273 in this embodiment, and a second guide column 5277 is provided at the first limiting block 5275. The second guide column 5277 is slidably connected to the first sliding groove, and the first elastic member 5276 is sleeved on the outer side of the second guide column 5277. The structure is compact, which improves the stability of the encoder reverse component 527 during use.

[0107] Other structures of the reverse adsorption conveying device 5 in this embodiment are described as follows:

[0108] Combination Figure 2 , Figure 7 and Figure 8 In this embodiment, the reverse side adsorption conveying device 5 includes a lifting mechanism 53, which is arranged on a support frame 51. The lifting mechanism 53 is connected to a belt adsorption mechanism 52. The lifting mechanism 53 drives the belt adsorption mechanism 52 to move up and down, so as to meet the adsorption and grabbing of materials of different thicknesses and improve the applicability of the device.

[0109] The lifting mechanism 53 includes a lifting drive member 531 and a counterweight assembly 532; the lifting drive member 531 is arranged on the support frame 51, and the bottom end of the lifting drive member 531 is connected to the belt adsorption mechanism 52, and the lifting drive member 531 drives the belt adsorption mechanism 52 to move up and down; the setting of the lifting mechanism 53 enables the belt adsorption mechanism 52 to move up and down, so as to adapt to the adsorption and grasping of materials of different thicknesses.

[0110] There are two groups of counterweight assemblies 532, which are relatively arranged on both sides of the support frame 51, which helps to balance the weight of the belt adsorption mechanism 52 during the lifting process, reduce the load of the lifting mechanism 53, and improve the stability and operation efficiency of the device; the relative arrangement of the two groups of counterweight assemblies 532 makes the weight distribution more uniform, reducing the negative impact of imbalance on the operation of the device.

[0111] The counterweight assembly 532 includes a counterweight block 5321, a fixed pulley 5322, and a steel wire rope 5323; the counterweight block 5321 is located outside the support frame 51. The weight of the counterweight block 5321 in this embodiment is substantially the same as the weight of the belt adsorption mechanism 52. The fixed pulley 5322 is rotatably disposed on the support frame 51; the steel wire rope 5323 is mounted on the fixed pulley 5322, and one end of the steel wire rope 5323 is connected to the counterweight block 5321, and the other end of the steel wire rope 5323 is connected to the belt adsorption mechanism 52.

[0112] The counterweight assembly 532 can balance the weight change during the movement of the lifting mechanism 53 through the setting of the counterweight block 5321, reduce the load of the lifting mechanism 53, and help stabilize the operation of the mechanism; the rotation of the fixed pulley 5322 is set on the support frame 51, which can guide the movement direction of the wire rope 5323, ensure that the wire rope 5323 can smoothly transmit force, and avoid unnecessary failures and damage due to excessive resistance. One end of the wire rope 5323 is connected to the counterweight block 5321, and the other end is connected to the belt adsorption mechanism 52. Through the setting of the wire rope 5323, the movement force of the lifting mechanism 53 can be effectively transmitted, so that the belt adsorption mechanism 52 can move up and down stably, meeting the functional requirements of adsorbing and grabbing materials of different thicknesses.

[0113] In this embodiment, the support frame 51 is also slidably connected to the counterweight block 5321 through a weight-reducing linear bearing 5326 to ensure the stability of the counterweight block 5321 during the up and down movement.

[0114] Furthermore, a guide hole is provided on the support frame 51; the lifting mechanism 53 in this embodiment also includes a guide column connecting plate 5324 and a first guide column 5325, and the guide column connecting plate 5324 is located above the support frame 51; the first guide column 5325 passes through the guide hole, the top end of the first guide column 5325 is connected to the guide column connecting plate 5324, and the bottom end of the first guide column 5325 is connected to the belt adsorption mechanism 52, which improves the stability of the belt adsorption mechanism 52 during the up and down movement and avoids the mechanism from deflecting and shaking.

[0115] The working steps of the PCB online appearance inspection machine of the utility model are as follows:

[0116] 1. Place the material to be inspected on the first conveying device 21, and start the first conveying device 21 to start conveying the material. At the same time, start the second conveying device 22 to operate synchronously with the first conveying device 21 to continue conveying the material.

[0117] 2. The loading detection device 25 detects whether the material passes through the loading position.

[0118] When the material passes through the loading position, the loading detection device 25 performs detection to ensure that the material passes normally.

[0119] 3. The integration device 23 aligns and integrates the materials at the integration position.

[0120] (1) Ensure that the material at the integration position is within the action range of the integration device 23.

[0121] (2) The integration device 23 aligns and integrates the materials at the integration position to ensure that the materials are arranged neatly. The integration drive assembly 235 drives the second fixed plate 234 to move relative to the first fixed plate 231, thereby aligning and integrating the materials.

[0122] 4. The thickness measuring device 24 detects the thickness of the material.

[0123] (1) The guide pressure plate 245 guides the material on the first conveying device 21 toward the bottom end of the pressure wheel 243.

[0124] When the material is stuck between the first conveyor 21 and the guide plate 245, the material will push up the guide plate 245. The guide plate 245 slides upward along the linear bearing 247, and the sensor 248 detects that the guide plate 245 is pushed up, and the sensor 248 sends an alarm to the controller of the PCB online appearance inspection machine.

[0125] (2) When the material moves to the thickness measuring position, the thickness measuring device 24 lifts the pressing wheel 243 through the material, and the distance measuring sensor 244 detects the distance the pressing wheel 243 is lifted, so as to detect the thickness of the material. The lifting mechanism 53 is determined to adjust the height of the belt adsorption mechanism 52 based on the thickness of the material, so as to ensure that the belt adsorption mechanism 52 can adsorb and grab the material on the first conveying device 21.

[0126] 5. The positioning device 26 detects the position of the material.

[0127] The material moves to the second detection position, and the positioning device 26 detects the material on the first conveying device 21, and determines the detection time of the material by the back detection device 4 based on the position of the detected material.

[0128] 6. The lifting mechanism 53 adjusts the height of the belt adsorption mechanism 52 according to the detection result of the thickness measuring device 24 , so that the belt adsorption mechanism 52 can adsorb and grab the material on the first conveying device 21 .

[0129] The lifting drive member 531 drives the belt adsorption mechanism 52 to move up and down, thereby adapting to plates of different thicknesses.

[0130] By adjusting the fixed pulley 5322 and the wire rope 5323 of the counterweight assembly 532, when the lifting drive 531 drives the belt adsorption mechanism 52 to move upward, the counterweight block 5321 moves downward. When the lifting drive 531 drives the belt adsorption mechanism 52 to move upward, the counterweight block 5321 moves downward. The counterweight block 5321 offsets most of the gravity of the belt adsorption mechanism 52, which can reduce the load of the lifting drive 531.

[0131] 7. The belt adsorption mechanism 52 adsorbs and transports the materials.

[0132] The suction device is connected to the confluence assembly 525 to form a negative pressure environment; through the air holes 5231 on the scanning belt 523, the negative pressure environment is connected to the air holes 5231 through the air delivery holes 5241 to form suction; under the action of the suction, the material can be adsorbed on the air holes 5231 of the scanning belt 523. The roller assembly 522 starts to rotate, so that the material adsorbed on the scanning belt 523 is transported as the belt moves.

[0133] (1) The material is guided by the feed guide plate 526 on the first conveyor, so that the material can smoothly enter the belt adsorption mechanism 52, ensuring the accurate adsorption and transportation of the material.

[0134] (2) When the material is transported to the first material discharge position, the first row of air delivery holes 5241a adsorbs and grabs the top surface of the material.

[0135] The material is gradually moved from the first row of air holes 5241a to the second row of air holes 5241b. The suction force of the first row of air holes 5241a is less than that of the second row of air holes 5241b. The suction force of the first row of air holes 5241a is sufficient for material transportation. The structure is exquisitely designed, saving the use cost of the equipment.

[0136] 8. The second row of air delivery holes 5241b adsorbs the material, and the air delivery hole density of the second row of air delivery holes 5241b is large, so that the material is adsorbed and leveled. When the material reaches the top of the back detection device 4, the back detection device 4 detects the bottom surface of the material.

[0137] 9. The material is fixed by the second row of air delivery holes 5241b and gradually moves to the third row of air delivery holes 5241c. When the material reaches the top of the second conveyor 22, it is transported by the scanning belt 523 until the adsorption force disappears, and the material is released and falls on the second conveyor 22.

[0138] The suction force of the third row of gas delivery holes 5241c is smaller than that of the second row of gas delivery holes 5241b. The suction force of the third row of gas delivery holes 5241c is sufficient for material transportation, thus saving production costs.

[0139] Repeat the above steps to carry out continuous material adsorption and transportation process.

[0140] 10. The second conveying device 22 continues to convey the material, and the front detection device 3 takes photos and detects the material located at the front detection position.

[0141] 11. Complete the entire detection and delivery process.

[0142] This completes the working process of the PCB online appearance inspection machine of this preferred embodiment.

[0143] According to the requirements of different usage scenarios, the belt adsorption mechanism 52 in this embodiment can also be driven by the lifting mechanism 53 to drive the adsorbed material to be transported up and down, thereby completing the up and down adsorption operation from the first conveying device 21 to the second conveying device 22.

[0144] The back side detection device and other structures of the detection machine in this embodiment are not the main invention points of this application. The invention points lie in the structural layout of the reverse side adsorption and conveying device that cooperates with the back side detection device and its coordinated work with other parts.

[0145] The back detection device 5 in this embodiment specifically includes a CCD camera photographing structure and control technology which are prior art. The front detection device 3 is not the main invention point of this application, and its specific detection device includes prior art such as a CCD camera photographing device. The sensors cited in the detection device and the connection and control technology between the sensors and the device controller are prior art, and are not the core innovation point of this utility model, and therefore are not elaborated in this application.

[0146] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A PCB online appearance inspection machine, characterized in that: include: Base box; A conveying platform is arranged on the base box and is used to convey materials. The conveying platform includes a first conveying device and a second conveying device with the same conveying direction. A loading position, a back detection position and a front detection position are arranged on the conveying platform. The loading position is on the first conveying device, the back detection position is between the first conveying device and the second conveying device, and the front detection position is on the second conveying device. A back-side adsorption conveying device is located above the first conveying device and the second conveying device, and the back-side adsorption conveying device is located above the back-side detection position, and the back-side adsorption conveying device is used to adsorb and grasp the top surface of the material and convey the material from the first conveying device to the second conveying device; A back detection device, located between the first conveying device and the second conveying device, the back detection device detects the bottom surface of the material at the back detection position; as well as A front detection device is connected to the base box, and the front detection device takes a photo to detect the top surface of the material located at the front detection position.

2. A PCB online appearance inspection machine according to claim 1, characterized in that: The reverse side adsorption and conveying device comprises: a support frame connected to the base box; and A belt adsorption mechanism is connected to the support frame, and the belt adsorption mechanism is located above the first conveying device and the second conveying device. The belt adsorption mechanism is used to absorb, grasp and transport the material.

3. A PCB online appearance inspection machine according to claim 2, characterized in that: The belt adsorption mechanism comprises: A belt connecting plate connected to the supporting frame; A roller assembly connected to the belt connecting plate; A scanning belt is sleeved on the roller assembly, the roller assembly drives the scanning belt to rotate, and the scanning belt is provided with air holes; A belt support plate is located below the roller assembly, the belt support plate is connected to the belt connecting plate, the bottom surface of the belt support plate is in contact with the inner ring of the scanning belt, an air delivery hole is provided at the bottom end of the belt support plate, and one end of the air delivery hole is connected to the air vent; and A confluence component is arranged on the belt connecting plate, and the confluence component is externally connected to an air suction device. The confluence component is connected to the other end of the air delivery hole, and the confluence component is used to absorb and grab the material through the air hole.

4. A PCB online appearance inspection machine according to claim 3, characterized in that: The roller assembly comprises: A driving shaft is located at one side of the belt support plate, the driving shaft is rotatably connected to the belt connecting plate, the outer peripheral side of the driving shaft is in contact with one side of the inner ring of the scanning belt, and the driving shaft drives the scanning belt to rotate; A rotating motor is arranged on the belt connecting plate, and the rotating motor drives the driving shaft to rotate; A driven shaft is located at the other side of the belt support plate, the driven shaft is rotatably connected to the belt connecting plate, the outer side of the driven shaft is in contact with the other side of the inner ring of the scanning belt, and the driven shaft is rotatably connected to the scanning belt; and A tensioning shaft is located above the belt supporting plate. The tensioning shaft is rotatably connected to the belt connecting plate. The outer peripheral side of the tensioning shaft is in contact with the inner ring of the scanning belt to tension the scanning belt.

5. The PCB online appearance inspection machine according to claim 2, characterized in that: The reverse side adsorption and conveying device comprises a lifting mechanism, wherein the lifting mechanism is arranged on the supporting frame, the lifting mechanism is connected with the belt adsorption mechanism, and the lifting mechanism drives the belt adsorption mechanism to move up and down.

6. A PCB online appearance inspection machine according to claim 5, characterized in that: The lifting mechanism comprises: A lifting drive member is arranged on the support frame, the bottom end of the lifting drive member is connected to the belt adsorption mechanism, and the lifting drive member drives the belt adsorption mechanism to move up and down; The counterweight assembly is provided in two groups, and the two groups of the counterweight assembly are relatively arranged on both sides of the support frame.

7. A PCB online appearance inspection machine according to claim 6, characterized in that: The counterweight assembly comprises: A counterweight block is located outside the support frame; a fixed pulley, rotatably disposed on the support frame; and A steel wire rope is laid on the fixed pulley, one end of the steel wire rope is connected to the counterweight block, and the other end of the steel wire rope is connected to the belt adsorption mechanism.

8. The PCB online appearance inspection machine according to claim 1, characterized in that: The first conveying device is provided with a thickness measuring device, and the thickness measuring device is provided on the base box, and the thickness measuring device is used to detect the thickness of the material.

9. A PCB online appearance inspection machine according to claim 8, characterized in that: The conveying platform is provided with a thickness measuring position, and the thickness measuring device comprises: A roller shaft seat is arranged on the base box, and the roller shaft seat is provided with a rotating bearing for sliding along the vertical direction; A pressing wheel, located above the thickness measuring position, wherein the end of the pressing wheel is rotatably connected to the rotating bearing; A mounting base connected to the base box; and A distance measuring sensor is connected to the mounting base, and the distance measuring sensor is located above the pressing wheel. The distance measuring sensor is used to detect the moving distance of the pressing wheel, so as to obtain the thickness of the material.

10. A PCB online appearance inspection machine according to claim 9, characterized in that: The thickness measuring device also includes: A guide pressure plate connected to the mounting seat, the guide pressure plate is located at a side away from the pressure wheel, and the distance between the bottom surface of the guide pressure plate away from the pressure wheel and the plane where the first conveying device is located gradually increases; A linear bearing is vertically arranged on the mounting seat, and the guide pressure plate is slidably connected to the mounting seat through the linear bearing; and A sensor is connected to the mounting seat, and the sensor is used to detect the position of the guide pressure plate.

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