Circuit board detection pretreatment device

Abstract

The utility model discloses a circuit board detection pretreatment device. The circuit board detection pretreatment device comprises a base frame, and a feeding roller group, a feeding roller group, a longitudinal limiting assembly and a first detection sensor which are all arranged on the base frame, the longitudinal limiting assembly comprises a guide part, a first motor, a first synchronous wheel, a second synchronous wheel, a first synchronous belt and limiting plates arranged in pairs. A feeding roller set drives a circuit board to move forwards to achieve feeding, after a first detection sensor detects the circuit board, the feeding roller set conveys the circuit board to the position between limiting plates of a longitudinal limiting assembly, a first synchronous belt is driven to rotate through rotation of a first motor, the limiting plates located on the first synchronous belt move in the opposite direction, and the circuit board is conveyed to the position between the limiting plates of the longitudinal limiting assembly. Therefore, the circuit board is clamped and limited, so that the side edge of the circuit board is parallel to the feeding direction of the circuit board, and the detection error of the circuit board is reduced when the feeding roller group conveys the circuit board to the circuit board detection equipment for detection.

Description

Technical Field

[0001] The utility model relates to the field of circuit board detection equipment, and particularly relates to a circuit board detection pretreatment device. Background Art

[0002] At present, some circuit board detection devices take backlight images of the entire board surface of the circuit board through image recognition technology, and then identify the captured images through algorithms to find defective boards with problems on the circuit board in the images. However, the current circuit detection devices use a continuous conveyor belt to transport the circuit board to the backlight imaging module for shooting. Since the surface of the conveyor belt is made of flexible material, the circuit board cannot be kept horizontal and the side cannot be parallel to the conveying direction, resulting in deviation. This easily causes the captured image to require secondary processing and correction by the algorithm, resulting in a low detection success rate. Summary of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a circuit board detection pretreatment device to solve the above problems.

[0004] To solve the above technical problems, the technical solution of the utility model is: a circuit board detection pretreatment device, including a base frame, a feeding roller group, a feeding roller group, a longitudinal limiting component and a first detection sensor all arranged on the base frame; the feeding roller group and the feeding roller group arranged in sequence along the advancing direction of the circuit board; the longitudinal limiting component is arranged below the feeding roller group; the longitudinal limiting component includes a guiding member, a first motor, a first synchronous pulley, a second synchronous pulley, a first synchronous belt and a pair of limiting plates; the guiding member and the first motor are arranged on the base frame, and the second synchronous pulley is hinged to the base frame; the first synchronous pulley is fixedly installed on the output end of the first motor, the first synchronous belt is sleeved on the first synchronous pulley and the second synchronous pulley, the guiding member is parallel to the first synchronous belt pulley, the limiting plate is fixedly connected to the movable end of the guiding member, and the limiting plates are respectively fixedly connected to the loose side and the tight side of the first synchronous belt; the limiting plate extends towards the roller gap of the feeding roller group to form an abutting portion; the first motor drives the first synchronous pulley, the second synchronous pulley and the first synchronous belt to rotate, wherein the loose side and the tight side of the first synchronous belt move towards each other, so as to drive the limiting plates fixedly installed on the loose side and the tight side to move towards each other and clamp and fix the PCB board on the feeding roller group, thereby calibrating the position of the PCB board on the feeding roller group; the first detection sensor is arranged on the base frame and is located between the feeding roller group and the feeding roller group.

[0005] Preferably, the feeding roller group includes a plurality of feeding rollers arranged at intervals, hinge seats arranged on the base frame and hinged to both ends of the feeding rollers, third synchronous wheels arranged at one end of the feeding rollers, a plurality of tension wheels of an intermediate wheel hinged and installed on the base frame and located between adjacent third synchronous wheels, a second motor arranged on the base frame, a fourth synchronous wheel arranged on the output shaft of the second motor, and a second synchronous belt sleeved on the third synchronous wheels, intermediate wheels, tension wheels and fourth synchronous wheels.

[0006] Preferably, the feeding roller group includes conveying rollers and cleaning rollers. There are a plurality of the conveying rollers, and at least one cleaning roller is arranged on both sides of the circuit board.

[0007] Preferably, the tangential direction during the rotation of the cleaning roller is opposite to the advancing direction of the circuit board.

[0008] Preferably, a second detection sensor is further arranged on the base frame, and the second detection sensor is located beside the feeding roller group.

[0009] Preferably, a third detection sensor is further arranged on the base frame, and the third detection sensor is located beside the feeding roller group.

[0010] The technical effect of the present utility model is mainly reflected in that: the feeding roller group drives the circuit board to advance to achieve feeding. When the first detection sensor detects the circuit board, the feeding roller group conveys the circuit board between the limiting plates of the longitudinal limiting assembly. By rotating the first motor, the first synchronous belt is driven to rotate, so that the limiting plates located on the first synchronous belt move towards each other, thereby clamping and limiting the circuit board, making the side of the circuit board parallel to the feeding direction of the circuit board. When the subsequent feeding roller group conveys the circuit board into the circuit board detection device for detection, the detection error of the circuit board is reduced. Description of the Drawings

[0011] Figure 1 is the front view of the present utility model;

[0012] Figure 2 is the front sectional view of the present utility model.

[0013] The reference numerals are: 1 - base frame, 2 - feeding roller group, 21 - conveying roller, 22 - cleaning roller, 3 - feeding roller group, 31 - feeding roller, 32 - hinge seat, 33 - third synchronous wheel, 34 - tension wheel, 35 - second motor, 36 - fourth synchronous wheel, 37 - second synchronous belt, 4 - longitudinal limiting assembly, 41 - guiding member, 42 - first motor, 43 - first synchronous wheel, 44 - second synchronous wheel, 45 - first synchronous belt, 46 - limiting plate, 47 - abutting portion, 5 - first detection sensor, 6 - second detection sensor, 7 - third detection sensor. Detailed implementation manners

[0014] The following further details the specific implementation manners of the present utility model in conjunction with the accompanying drawings, so that the technical solutions of the present utility model are easier to understand and master.

[0015] In this embodiment, it should be understood that the orientation or positional relationship indicated by terms such as "middle", "upper", "lower", "top", "right side", "left end", "above", "back", "middle", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0016] In addition, in this specific implementation manner, if there is no special description of the connection or fixing method between components, the connection or fixing method can be bolt fixing or pin fixing commonly used in the prior art, or pin shaft connection, etc. Therefore, it will not be elaborated in this embodiment.

[0017] The present utility model provides a circuit board detection preprocessing device, as Figure 1-2As shown, it includes a base frame 1, a feeding roller group 2, a material feeding roller group 3, a longitudinal limiting component 4 and a first detection sensor 5, all of which are arranged on the base frame 1; the feeding roller group 2 and the material feeding roller group 3 are arranged in sequence along the advancing direction of the circuit board; the longitudinal limiting component 4 is arranged below the material feeding roller group 3; the longitudinal limiting component 4 includes a guiding member 41, a first motor 42, a first synchronous pulley 43, a second synchronous pulley 44, a first synchronous belt 45 and a pair of limiting plates 46 arranged; the guiding member 41 and the first motor 42 are arranged on the base frame 1, and the second synchronous pulley 44 is hinged to the base frame 1; the first synchronous pulley 43 is fixedly installed on the output end of the first motor 42, the first synchronous belt 45 is sleeved on the first synchronous pulley 43 and the second synchronous pulley 44, the guiding member 41 is parallel to the active end of the first synchronous belt 45, the limiting plate 46 is fixedly connected to the active end of the guiding member 41, and the limiting plate 46 is respectively fixedly connected to the loose side and the tight side of the first synchronous belt 45; the limiting plate extends towards the roller group gap of the material feeding roller group 3 to form an abutting portion 47, so as to use the abutting portion to approach and abut against the PCB board; the first motor 42 drives the first synchronous pulley 43, the second synchronous pulley 44 and the first synchronous belt 45 to rotate, wherein the loose side and the tight side of the first synchronous belt 45 move towards each other, so as to drive the limiting plates 46 fixedly installed on the loose side and the tight side respectively to move towards each other and clamp and fix the PCB board on the material feeding roller group 3, so as to calibrate the position of the PCB board on the material feeding roller group 3, and the PCB board is completely parallel to the advancing direction of the PCB board, and enables the calibrated PCB board to be located directly below the image recognition module after continuing to advance; the first detection sensor 5 is arranged on the base frame 1 and is located between the feeding roller group 2 and the material feeding roller group 3. The feeding roller group 2 drives the circuit board to advance to achieve feeding. When the first detection sensor 5 detects the circuit board, the material feeding roller group 3 conveys the circuit board between the limiting plates 46 of the longitudinal limiting component 4. By rotating the first motor 42, the first synchronous belt 45 is driven to rotate, so that the limiting plates 46 located on the first synchronous belt 45 move towards each other, thereby clamping and limiting the circuit board, making the side of the circuit board parallel to the feeding direction of the circuit board, and reducing the error of circuit board detection when the material feeding roller group 3 then conveys the circuit board into the circuit board detection device for detection.

[0018] Preferably, the feeding roller set 3 includes a plurality of feeding rollers 31 arranged at intervals, hinge seats 32 provided on the base frame 1 and hinged to both ends of the feeding rollers 31, third synchronous wheels 33 provided at one end of the feeding rollers 31, a plurality of tension wheels 34 of an idler pulley arranged on the base frame 1 and located between adjacent third synchronous wheels 33, a second motor 35 provided on the base frame 1, a fourth synchronous wheel 36 provided on the output shaft of the second motor 35, and a second synchronous belt 37 sleeved on the third synchronous wheels 33, idler pulleys, tension wheels 34 and the fourth synchronous wheel 36. By driving the second synchronous belt 37 with the second motor 35, the third synchronous belt rotates synchronously and drives the feeding rollers 31 to rotate synchronously. The tension wheels 34 are also used to increase the wrap angle of the second synchronous belt 37 on the fourth synchronous wheel 36, thereby avoiding slipping and idling.

[0019] In the existing circuit board detection preprocessing device, dust and particulate matter existing on the circuit board can also cause misdetection during circuit board detection. Preferably, the feeding roller set 2 includes conveying rollers 21 and cleaning rollers 22. A plurality of the conveying rollers 21 are provided, and at least one cleaning roller 22 is provided on each side of the circuit board. Thus, the cleaning roller 22 performs dust removal on both sides of the circuit board, so that there is no dust on both the front and back sides during circuit board detection, thereby reducing the detection error and avoiding misdetection.

[0020] Preferably, the tangential direction of the cleaning roller 22 during rotation is opposite to the advancing direction of the circuit board, which is convenient for the relative speed between the tangential direction of the cleaning roller 22 during rotation and the circuit surface to be greater, so as to quickly and effectively remove the dust on the circuit board.

[0021] Preferably, a second detection sensor 6 is further provided on the base frame 1. The second detection sensor 6 is located beside the feeding roller set 2 and is used to detect whether a circuit board enters the feeding roller set 2.

[0022] Preferably, a third detection sensor 7 is further provided on the base frame 1. The third detection sensor 7 is located beside the feeding roller set 3 and is used to detect whether a circuit board is sent out of the feeding roller set 3, so as to facilitate obtaining the position information of the circuit board in subsequent processes.

[0023] The technical effects of the present utility model are mainly reflected as follows: The feeding roller set drives the circuit board to advance to achieve feeding. When the first detection sensor detects the circuit board, the feeding roller set conveys the circuit board between the limiting plates of the longitudinal limiting assembly. By rotating the first motor, the first synchronous belt rotates, so that the limiting plates located on the first synchronous belt move towards each other, thereby clamping and limiting the circuit board, making the side of the circuit board parallel to the feeding direction of the circuit board. When the feeding roller set then conveys the circuit board into the circuit board detection device for detection, the detection error of the circuit board is reduced.

[0024] Of course, the above are only typical examples of the present utility model. In addition, the present utility model can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present utility model.

Claims

1. A circuit board detection preprocessing device, characterized in that, It includes a base frame, a feeding roller set, a feeding roller set, a longitudinal limiting component, and a first detection sensor, all of which are arranged on the base frame; the feeding roller set and the feeding roller set are arranged in sequence along the advancing direction of the circuit board; the longitudinal limiting component is arranged below the feeding roller set; The longitudinal limiting component includes a guiding member, a first motor, a first synchronous pulley, a second synchronous pulley, a first synchronous belt, and a pair of limiting plates arranged in pairs; the guiding member and the first motor are arranged on the base frame, and the second synchronous pulley is hinged to the base frame; the first synchronous pulley is fixedly installed on the output end of the first motor, the first synchronous belt is sleeved on the first synchronous pulley and the second synchronous pulley, the guiding member is parallel to the first synchronous belt pulley, the limiting plate is fixedly connected to the movable end of the guiding member, and the limiting plate is fixedly connected to the loose side and the tight side of the first synchronous belt respectively; the limiting plate extends towards the roller gap of the feeding roller set to form an abutting portion, and the first motor drives the first synchronous pulley, the second synchronous pulley, and the first synchronous belt to rotate, wherein the loose side and the tight side of the first synchronous belt move towards each other, thereby driving the limiting plates fixedly installed on the loose side and the tight side respectively to move towards each other and clamp and fix the PCB board on the feeding roller set, thereby calibrating the position of the PCB board on the feeding roller set; the first detection sensor is arranged on the base frame and is located between the feeding roller set and the feeding roller set.

2. The preprocessing device for circuit board detection according to claim 1, wherein, The feeding roller set includes a plurality of feeding rollers arranged at intervals, hinge seats arranged on the base frame and hinged to both ends of the feeding rollers, third synchronous pulleys arranged at one end of the feeding rollers, a plurality of tensioning wheels arranged on the base frame and located between adjacent third synchronous pulleys, a second motor arranged on the base frame, a fourth synchronous pulley arranged on the output shaft of the second motor, and a second synchronous belt sleeved on the third synchronous pulley, the intermediate wheel, the tensioning wheel, and the fourth synchronous pulley.

3. A circuit board detection preprocessing device as described in claim 1, characterized in that, The feeding roller set includes a conveying roller and a cleaning roller, and a plurality of the conveying rollers are provided, and at least one cleaning roller is provided on both sides of the circuit board.

4. The pretreatment device for circuit board detection according to claim 3, characterized in that, The tangential direction during the rotation of the cleaning roller is opposite to the advancing direction of the circuit board.

5. A circuit board detection preprocessing device as described in claim 1, wherein A second detection sensor is further arranged on the base frame, and the second detection sensor is located beside the feeding roller set.

6. The preprocessing device for circuit board detection according to claim 1, wherein A third detection sensor is further arranged on the base frame, and the third detection sensor is located beside the feeding roller set.

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