CN111912851A - Optical detection device - Google Patents

Abstract

The application provides an optical detection equipment for detect circuit board includes: the board arranging mechanism is used for arranging the circuit boards to be aligned along a first direction; the pressing wheel mechanism is connected with the discharge end of the board arranging mechanism and is used for flattening the circuit board; the conveying mechanism is connected with the discharge end of the pressing wheel mechanism and is used for conveying the circuit board at a preset speed; and the detection mechanism is arranged on the pressing wheel mechanism and used for detecting the board surface of the circuit board in the process of conveying the circuit board by the conveying mechanism. The application provides an optical detection device which can efficiently and quickly detect a circuit board and ensure the detection accuracy.

Description

Optical detection device

Technical Field

The application relates to the field of detection equipment, in particular to optical detection equipment.

Background

In Printed Circuit Board (PCB)/Flexible Circuit Board (FPC) online Automatic Optical Inspection (AOI) equipment, Optical Inspection needs to be performed on a Circuit Board, and how to provide an Optical Inspection apparatus can perform efficient and rapid Inspection while ensuring Inspection accuracy becomes a technical problem to be solved.

Disclosure of Invention

The application provides an optical detection device which can efficiently and quickly detect a circuit board and ensure the detection accuracy.

The embodiment of the application provides an optical detection device for detect circuit board, include:

the board arranging mechanism is used for arranging the circuit boards to be aligned along a first direction;

the pressing wheel mechanism is connected with the discharge end of the board arranging mechanism and is used for flattening the circuit board;

the conveying mechanism is connected with the discharge end of the pressing wheel mechanism and is used for conveying the circuit board at a preset speed; and

the detection mechanism is arranged on the pressing wheel mechanism and used for detecting the board surface of the circuit board in the process of conveying the circuit board by the conveying mechanism.

The optical detection equipment that this application embodiment provided, through align the long limit or the minor face of circuit board along the benchmark limit of whole board mechanism on whole board mechanism, it is parallel or level for the horizontal plane that the circuit board is through the pinch roller mechanism, press from both sides the circuit board through transport mechanism, and make the circuit board remove with stable speed, shoot the image of circuit board at the in-process of transport mechanism conveying circuit board through detection mechanism, both can improve the optical detection efficiency of every circuit board, transport mechanism removes with the mode of pressing from both sides the circuit board simultaneously, can ensure the uniform motion of circuit board, and then ensure the definition of optical detection's image, and then ensure the precision that optical detection equipment acquires the defect of circuit board.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an optical detection apparatus provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a plate-arranging mechanism according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a set of adjusting mechanisms in fig. 2.

Fig. 4 is a schematic view of an adjustment mechanism of fig. 3 at a deflection angle.

Fig. 5 is a schematic view of an adjustment mechanism of fig. 3 at another deflection angle.

Fig. 6 is a cross-sectional view of the adjustment mechanism provided in fig. 4.

Fig. 7 is a side view of the adjustment mechanism provided in fig. 4.

Fig. 8 is a schematic structural diagram of a connecting wheel mechanism and a pressing wheel mechanism according to an embodiment of the present application.

Fig. 9 is a side view of a fifth wheel mechanism and a pinch roller mechanism according to an embodiment of the present disclosure.

Fig. 10 is a side view of an optical inspection apparatus provided in an embodiment of the present application.

FIG. 11 is a schematic structural diagram of a detecting mechanism and a puck assembly according to an embodiment of the present application.

Fig. 12 is a side view of a detection mechanism provided in an embodiment of the present application.

Fig. 13 is a schematic diagram of a first view of a portion of the camera assembly provided in fig. 12.

Fig. 14 is a schematic diagram of a second perspective view of the portion of the camera assembly provided in fig. 12.

Fig. 15 is a schematic structural diagram of a transmission mechanism and a connection wheel mechanism according to an embodiment of the present application.

Fig. 16 is a schematic structural diagram of a conveying mechanism according to an embodiment of the present application.

Fig. 17 is a partially enlarged view of the conveyance mechanism in fig. 16.

Fig. 18 is a schematic structural view of the first transfer assembly of fig. 17 clamping the circuit board.

Fig. 19 is a schematic structural view of the first jig in fig. 18.

Fig. 20 is a schematic structural view of the second transfer module of fig. 17 clamping the circuit board.

Fig. 21 is a schematic structural view of the second jig of fig. 20.

Fig. 22 is a schematic structural diagram of a conveying mechanism according to a second embodiment of the present application.

Fig. 23 is a partially enlarged view of the transfer mechanism of fig. 22.

Fig. 24 is a second enlarged view of a portion of the transport mechanism in fig. 22.

Fig. 25 is a partially enlarged view of the first transfer assembly and the second transfer assembly of fig. 24.

Fig. 26 is a schematic structural view of the first transfer assembly of fig. 24 holding a circuit board.

Fig. 27 is a schematic structural view of the first jig in fig. 26.

Fig. 28 is a schematic structural view of the second transfer module of fig. 24 holding a circuit board.

Fig. 29 is a schematic structural view of the second jig of fig. 28.

Fig. 30 is a side view of a blanking conveying mechanism according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The embodiments listed in the present application may be appropriately combined with each other.

The embodiment of the application provides an optical detection device 1000. The optical inspection apparatus 1000 may be used to detect the presence of defects on the circuit board 2000, such as open circuit lines, short circuits, micro-short circuits, copper contamination, burrs, dirt, pin holes, notches, etc., that affect the performance of the circuit board 2000. Thus, the production good product of the circuit board 2000 is screened out. Of course, the optical inspection apparatus 1000 may also be used to inspect other structures or devices.

Referring to fig. 1, the optical inspection apparatus 1000 provided in the present application is illustrated by taking an inspection circuit board 2000 as an example. The optical detection device 1000 includes a plate arranging mechanism 100, a connecting wheel mechanism 300, a pressing wheel mechanism 400, a conveying mechanism 600, a detection mechanism 800 and a blanking conveying mechanism 900. The plate arranging mechanism 100, the connecting wheel mechanism 300, the pinch roller mechanism 400, the conveying mechanism 600, and the blanking conveying mechanism 900 are connected in sequence, and the detecting mechanism 800 is provided on both upper and lower (with reference to the z-axis direction in fig. 1) sides of the pinch roller mechanism 400.

For convenience of description, the present embodiment defines the "front stage" as the source structure in the transmission direction of the circuit board 2000. The "rear stage" is a removing structure in the transfer direction of the wiring board 2000. The embodiment of the application defines that one end of each mechanism connected with the front section is a feeding end, and defines that one end of each mechanism connected with the rear section is a discharging end.

For convenience of description, a direction in which the plate adjusting mechanism 100, the pressing mechanism 400, and the transport mechanism 600 are sequentially connected is determined as an X-axis direction, and a direction perpendicular to the X-axis direction within the transport surface 113 of the wiring board 2000 is a Y-axis direction. The optical detection apparatus 1000 is disposed on a horizontal plane, and a height direction of the optical detection apparatus 1000 is defined as a Z-axis direction. The direction indicated by the arrow is the forward direction. The X-axis direction, the Y-axis direction and the Z-axis direction are vertical to each other. The first direction is an X-axis direction, and the second direction is a Z-axis direction.

Referring to fig. 1, the board aligning mechanism 100 is used for aligning a plurality of circuit boards 2000 in a first direction (X-axis direction). The board alignment mechanism 100 is used for automatically aligning the X direction of the circuit board 2000, which is automatically transferred from the front stage, with the reference edge 117, so as to provide a reference for the optical automatic detection of the rear stage, and transferring the circuit board 2000 to the pinch roller mechanism 400.

Referring to fig. 1, a connecting wheel mechanism 300 is connected to the discharging end of the board arranging mechanism 100, and the connecting wheel mechanism 300 is used for transferring the circuit board 2000 to the pressing wheel mechanism 400.

Referring to fig. 1, the pinch roller mechanism 400 is connected to the discharge end of the connecting roller mechanism 300. The pinch roller mechanism 400 is used to flatten the circuit board 2000. Specifically, the pressing wheel mechanism 400 can provide a flat image acquisition area for the detection mechanism 800, so that the circuit board 2000 can be ensured to have flatness when passing through the image acquisition area.

The transmission mechanism 600 is connected to the discharge end of the pinch roller mechanism 400, and the transmission mechanism 600 is used for transmitting the circuit board 2000 at a preset speed. The preset speed is equal speed or close to equal speed. The transmission mechanism 600 can provide a stable transmission speed for the detection mechanism 800, for example, the detection mechanism can transmit at a constant speed or at an actual speed with a required theoretical speed with high precision, and the image acquisition system matches and matches with the transmission speed of the circuit board 2000 to obtain a real image of the circuit board 2000, so as to provide an image basis for the detection software.

The detection mechanism 800 is disposed on the pinch roller mechanism 400, and the detection mechanism 800 is configured to detect the board surface of the circuit board 2000 in the process of conveying the circuit board 2000 by the conveying mechanism 600. The detection mechanism 800 can accurately acquire the image information of the circuit board 2000.

The optical detection device 1000 provided by the embodiment of the application aligns the long edge or the short edge of the circuit board 2000 along the reference edge 117 of the board arranging mechanism 100 on the board arranging mechanism 100, makes the circuit board 2000 parallel or flat relative to the horizontal plane through the pressing wheel mechanism 400, clamps the circuit board 2000 through the conveying mechanism 600, and moves the circuit board 2000 at a stable speed, and shoots the image of the circuit board 2000 through the detection mechanism 800 in the process of conveying the circuit board 2000 by the conveying mechanism 600, so that the optical detection efficiency of each circuit board 2000 can be improved, meanwhile, the conveying mechanism 600 moves in a linear manner by clamping the circuit board 2000, so that the linear uniform motion of the circuit board 2000 can be ensured, the definition of the image of the optical detection can be ensured, and the accuracy of the optical detection device 1000 in acquiring the defects of the circuit board 2000 can be ensured.

The blanking conveying mechanism 900 is provided below the conveying mechanism 600. In the process that the transmission mechanism 600 takes the circuit board 2000 out of the pinch roller mechanism 400, the detection mechanism 800 acquires an image, and the transmission mechanism 600 takes the circuit board 2000 out of the pinch roller mechanism 400 and then releases the circuit board 2000 into the blanking conveying mechanism 900.

The present embodiment specifically describes the plate arranging mechanism 100, the connecting wheel mechanism 300, the pressing wheel mechanism 400, the conveying mechanism 600, the detecting mechanism 800, and the blanking conveying mechanism 900, respectively.

In the first aspect, the present application exemplifies the structure of the whole plate mechanism 100, but of course, the present application includes, but is not limited to, the whole plate mechanism 100 provided in the following embodiments.

Referring to fig. 2, the plate-finishing mechanism 100 according to the embodiment of the present disclosure includes a machine 101, a transfer table 109, a plurality of sensors 119, an adjusting mechanism assembly 121, and a driving assembly. The driving assembly includes a first driving assembly 187 and a second driving assembly 189.

Referring to fig. 3, the adjusting mechanism assembly 121 includes a plurality of adjusting mechanism sets 123. Each row of adjustment mechanism set 123 (also called each set of adjustment mechanisms 123) includes a plurality of adjustment mechanisms 125.

Referring to fig. 2, for convenience of description, the transmission direction of the circuit board 2000 on the transmission platform 109 is defined as the X-axis direction. Here, a direction perpendicular to the X-axis direction on the conveyance surface 113 of the conveyance table 109 is defined as a Y-axis direction. The thickness direction of the transfer table 109 is defined as the Z-axis direction. The direction indicated by the arrow is a forward direction, and the direction opposite to the direction indicated by the arrow is a reverse direction.

Referring to fig. 2, the machine 101 includes a base 103, and a first supporting stage 105 and a second supporting stage 107 integrally formed with the base 103. The first support table 105 and the second support table 107 are arranged in the Y-axis direction. The first supporting platform 105 and the second supporting platform 107 are both provided with a plurality of fixing structures, and the fixing structures are used for positioning two ends of the adjusting mechanism assembly 121, so that the adjusting mechanism assembly 121 is installed on the machine platform 101. The adjusting mechanism assembly 121 and the base 103 are spaced apart from each other, so that the adjusting mechanism assembly 121 can be installed or maintained through the gap.

Referring to fig. 2, the transfer table 109 is plate-shaped. The transfer table 109 is disposed on the machine 101. The conveying table 109 is located on the side of the adjusting mechanism assembly 121 facing away from the base 103. The first support table 105 and the second support table 107 fix opposite ends of the transfer table 109. An accommodating space is formed between the transmission table 109 and the machine table 101. Specifically, the base 103, the first support platform 105, the second support platform 107 and the machine platform 101 surround to form a receiving space. The plurality of sets of adjusting mechanisms 125 are disposed in the accommodating space. The surface of the transport table 109 facing away from the adjustment mechanism assembly 121 is a surface for transporting the circuit board 2000, and is referred to as a transport surface 113 in this application.

Referring to fig. 2, the conveying table 109 is provided with a plurality of through holes 111 communicating with the accommodating space, and each through hole 111 penetrates through the conveying table 109 along the Z axis.

Referring to fig. 2, the conveying table 109 further includes a strip-shaped boss 115 disposed on one side of the conveying surface 113 (disposed on a side of the conveying table 109 away from the accommodating space). The bar-shaped bosses 115 are disposed adjacent to the first support stage 105. The bar-shaped bosses 115 extend in the X-axis direction. The strip-shaped projection 115 projects with respect to the conveying surface 113. The surface of the strip-shaped projection 115 facing the direction of the conveying surface 113 is a reference surface or reference edge 117. A plurality of sensors 119 are arranged on the strip-shaped bosses 115. The plurality of sensors 119 are arranged along the reference edge 117. The sensor 119 is used to detect whether the board to be conveyed (i.e., the wiring board 2000) is arranged along the reference edge 117. The sensors 119 include, but are not limited to, infrared sensors, brightness sensors, and the like.

The adjusting mechanism 125 comprises a transmission wheel 127, and at least part of the rolling surface on the transmission wheel 127 extends out of the conveying surface 113 through the through hole 111. In other words, the roller surfaces of the plurality of pulleys 127 are exposed on the conveyance surface 113. When the circuit board 2000 is disposed on the roller surface, the circuit board 2000 can be driven to move by driving the roller surface to roll, and the moving direction of the circuit board 2000 can be changed by changing the direction of the roller surface.

The driving component is connected to the driving wheel 127 to drive the driving wheel 127 to roll and/or rotate, so that the driving wheel 127 transmits the circuit board 2000 and the circuit board 2000 is arranged along the reference edge 117.

The board finishing mechanism 100 provided by the embodiment of the application, the reference edge 117 is arranged on the conveying table 109, the plurality of sensors 119 are arranged on the reference edge 117, the adjusting mechanism 125 comprises the driving wheel 127 and the driving component, the driving wheel 127 is driven by the driving component to convey the circuit board 2000 towards the reference edge 117 and arrange the circuit board 2000 along the reference edge 117, so that the circuit board 2000 is aligned with the reference edge 117, the circuit boards 2000 are strictly arranged along the reference edge 117, and the subsequent efficient processing of the circuit board 2000 is facilitated, and the board finishing mechanism 100 is high in automation degree, and time and labor cost are saved.

The sensor 119 comprises at least two light sensors. The light sensor is used to send detection light towards the transfer table 109. The detection light comprises at least one of infrared light and visible light. When the wiring board 2000 is disposed along the reference edge 117, the detection light reflected by the wiring board 2000 is received by at least two of the sensors 119.

For example, the sensor 119 may be a FU-35TZ small spot reflective sensor, the sensor 119 being insensitive to the color of the wiring board 2000. Therefore, the influence of dust and the color of the circuit board 2000 is avoided, and the stability of the performance of the whole board is improved.

The detection direction of the sensor 119 is toward the gap between the conveyance surface 113 and the reference edge 117 or the conveyance surface 113. In fig. 2, the detection direction of the plurality of sensors 119 is downward in the Z-axis direction (i.e., the Z-axis is reversed). When two or more sensors 119 detect the circuit board 2000, it indicates that the reference edge of the circuit board 2000 abuts against the reference edge 117, and the direction and position of the circuit board 2000 are accurate.

Of course, in other embodiments, sensor 119 may also include at least two pressure sensors. The pressure sensor is of a surface mount type and is attached to the reference edge 117, and can sensitively detect whether or not the circuit board 2000 abuts against the reference edge 117. When one side of the circuit board 2000 abuts against the reference side 117, at least two pressure sensors arranged at intervals receive pressure signals. In other words, when at least two pressure sensors spaced apart from each other receive a pressure signal, it can be interpreted that one side of the circuit board 2000 abuts against the reference side 117.

The structure of the adjustment mechanism 125 provided in the embodiment of the present application is explained below with reference to the drawings.

Referring to fig. 4, the adjusting mechanism 125 includes a driving wheel 127, a first driving component 137, a second driving component 147 and a third driving component 155.

Specifically, referring to fig. 4 and fig. 2, the driving wheel 127 is a roller. The axial direction of the rotating shaft of the transmission wheel 127 is parallel to the conveying surface 113 of the conveying table 109. The roller surface of the drive wheel 127 extends at least partially beyond the transport surface 113 of the transport table 109. When the circuit board 2000 is disposed on the transfer table 109, the circuit board 2000 contacts with the roller surface of the driving wheel 127, and moves under the driving of the friction force of the driving wheel 127.

The roller surface of the driving wheel 127 is provided with a straight knurling structure, which can improve the friction force required by the circuit board 2000 during transmission, thereby increasing the friction transmission efficiency between the transmission wheel and the circuit board 2000. Specifically, the roller surface of the driving wheel 127 is provided with a plurality of grooves, so that the roller surface of the driving wheel 127 forms a plurality of bosses, and thus, the friction force of the driving wheel 127 for conveying the sheet material can be increased, so that the sheet material and the like can be better conveyed. The length of the groove of the roller face of the drive wheel 127 (the axial direction of the drive wheel 127) is relatively short to make machining of the boss easier. Alternatively, the bosses of the roller surfaces of the driving wheels 127 can be mass-produced by using a plastic mold, so as to overcome the problem that the length of the grooves (axial direction of the driving wheels 127) of the conventional driving wheels 127 is relatively long, and the bosses are increased in the whole outer diameter, which greatly increases the production cost.

Alternatively, one through hole 111 in the conveying table 109 may correspond to one driving wheel 127 or a plurality of coaxially arranged driving wheels 127, which is not limited in the present application.

Referring to fig. 4, a first transmission assembly 137 is fixedly connected to the rotating shaft of the transmission wheel 127. When the first transmission assembly 137 rotates, the first transmission assembly 137 can drive the transmission wheel 127 to rotate, so that the circuit board 2000 moves or is transmitted to the rear section.

Referring to fig. 4, the second transmission assembly 147 is in transmission connection with the first transmission assembly 137. Drive connections include, but are not limited to, meshing connections, belt drive connections, roller-to-roller drive connections, and the like. When the second transmission assembly 147 rotates, the first transmission assembly 137 is driven to rotate. The rotation axis of the second transmission assembly 147 is intersected with or perpendicular to the rotation axis of the transmission wheel 127. In this embodiment, the rotation axis of the transmission wheel 127 is parallel to the conveying surface 113 of the conveying table 109. The second transmission assembly 147 has a rotation axis perpendicular to the conveying surface 113 of the conveying table 109.

Referring to fig. 4, the third transmission assembly 155 is in transmission connection with the second transmission assembly 147. Drive connections include, but are not limited to, meshing connections, belt drive connections, roller-to-roller drive connections, and the like. The first driving assembly 187 is connected to the third transmission assembly 155, so that the third transmission assembly 155 drives the second transmission assembly 147 to rotate under the action of the first driving assembly 187, and the first transmission assembly 137 at least partially rotates around the rotation axis of the transmission wheel 127, thereby driving the transmission wheel 127 to rotate. Optionally, the third transmission assembly 155 has an axial direction parallel to the conveying surface 113 of the conveying table 109. Wherein the axial direction of the third transmission assembly 155 is parallel to, intersects with or is collinear with the rotational axis of the transmission wheel 127. Alternatively, first drive assembly 187 may be a motor. Of course, in other embodiments, first drive assembly 187 could also be a pneumatic cylinder or the like.

Referring to fig. 4 and 5, the adjusting mechanism 125 further includes a fourth transmission assembly 161, and the fourth transmission assembly 161 is fixedly connected to the first transmission assembly 137. The second driving assembly 189 is connected to the fourth transmission assembly 161, so that the fourth transmission assembly 161 drives the first transmission assembly 137 and the transmission wheel 127 to deflect around the Z-axis direction under the action of the second driving assembly 189. Alternatively, the second drive assembly 189 may be an air cylinder. Of course, in other embodiments, the second driving assembly 189 may also be a motor or the like.

When the driving wheel 127 deflects around the Z-axis direction under the action of the second driving assembly 189, the direction of the driving wheel 127 changes, so that the direction of the friction force of the driving wheel 127 on the circuit board 2000 changes, the moving direction of the circuit board 2000 changes, and finally the transmission angle of the circuit board 2000 changes.

Referring to fig. 2 and 4, since the driving wheel 127 can rotate relative to the conveying table 109, a space is reserved between the driving wheel 127 and the hole wall of the through hole 111, so that the driving wheel 127 can rotate in the through hole 111. Optionally, the through hole 111 is circular. Thus, a gap is formed between the transmission wheel 127 and the wall of the through hole 111. Further, the adjusting mechanism 125 is provided with a rotating plate 129 fixedly connected to a supporting seat 135 (the supporting seat 135 will be described later) of the driving wheel 127, and the rotating plate 129 is disposed in the through hole 111 and can rotate in the through hole 111. An opening 131 is arranged in the rotating plate 129, and the transmission wheel 127 is transmitted out through the opening 131. The rotating plate 129 fills the gap between the driving wheel 127 and the wall of the through hole 111, so that the sealing between the driving wheel 127 and the wall of the through hole 111 is stronger, and dust or impurities are reduced from falling into the adjusting mechanism 125 through the gap. Meanwhile, the rotating plate 129 can rotate together with the driving wheel 127, and thus does not interfere with the rotation of the driving wheel 127.

In view of the above, the adjusting mechanism 125 provided in the embodiment of the present application has the functions of transmitting the circuit board 2000 and changing the transmission angle of the circuit board 2000. When the feeding direction and angle of the circuit board 2000 are irregular, the first driving component 187 can drive the driving wheel 127 to rotate to convey the circuit board 2000 to the rear section; in the process of conveying the circuit boards 2000, the second driving assembly 189 changes the angle of the driving wheel 127 to change the conveying direction of the circuit boards 2000 to the target direction, so that each circuit board 2000 is arranged along the reference edge 117, the whole circuit boards of the circuit boards 2000 are realized, the images collected by the stations of the rear-stage detection mechanism are accurately aligned with the standard images, the phenomena of false detection, missing detection and the like are reduced, and the detection efficiency is improved.

In the present application, leveling the irregular-state wiring board 2000 from the front stage etched line with the reference edge 117 in the X-axis direction includes, but is not limited to, the following embodiments.

Optionally, the first driving assembly 187 is used to rotate each driving wheel 127 backward, the circuit board 2000 is firstly transmitted to the reference edge 117 in the X-axis direction at a certain angle (0-180 °), when one corner of the circuit board 2000 reaches the reference edge 117, the sensor 119 detects the circuit board 2000 and generates a feedback signal, then the second driving assembly 189 is used to adjust the angle of the driving wheels 127 to be parallel to the reference edge 117 (i.e. in the X-axis direction), all the driving wheels 127 move in this way, and finally the circuit board 2000 moves parallel to the reference edge 117 in the X-axis direction, and is aligned with the reference edge 117 to enter the station of the automatic optical detection mechanism in order, so as to provide a correct acquisition state for the image acquisition system of the station of the automatic optical detection mechanism.

Alternatively, before the circuit board 2000 is sent to the transfer table 109, the direction in which the transfer table 109 is disposed near the drive pulley 127 of the first portion of the front stage (the extending direction of the roller surface on the transfer surface 113) is inclined with respect to the X-axis direction. For example, the direction of the transmission wheel 127 of the portion is reversely deflected by 45 ° from the X axis to the Y axis, and the transmission wheel 127 of the portion is rotated toward the direction of the rear stage. The direction in which the transmission wheel 127 of the second portion of the transfer table 109 (near the rear stage) is disposed is parallel to the X-axis direction, and the transmission wheel 127 of this portion is rotated in the direction of the rear stage. The ratio of the number of the transmission wheels 127 of the first portion to the number of the transmission wheels 127 of the second portion is not particularly limited. After the wiring board 2000 having the irregular direction and position from the preceding stage is transferred to the driving wheel 127 of the first portion of the transfer table 109, the wiring board 2000 is gradually brought close to the reference edge 117 by the driving wheel 127 of the first portion until a corner of the wiring board 2000 abuts against the reference edge 117, and then the wiring board 2000 is rotated by the driving wheel 127 of the first portion and by the abutting force of the reference edge 117 until the reference edge of the wiring board 2000 abuts against the reference edge 117. At this time, the at least two sensors 119 on the bar-shaped projection 115 can detect the circuit board 2000, indicating that the reference edge of the circuit board 2000 is disposed in the X-axis direction. Finally, the circuit board 2000 moves parallel to the reference edge 117 in the X-axis direction, is aligned with the reference edge 117, and enters the station of the automatic optical detection mechanism in order, so as to provide a correct acquisition state for an image acquisition system of the station of the automatic optical detection mechanism.

In the plate finishing mechanism 100 provided in the embodiment of the present application, the first driving assembly 187 is disposed in the adjusting mechanism 125, and sequentially passes through the third transmission assembly 155, the second transmission assembly 147 and the first transmission assembly 137 to transmit the driving force to the transmission wheel 127, so as to drive the transmission wheel 127 to rotate; the second driving assembly 189 is arranged to sequentially transmit driving force to the transmission wheel 127 through the fourth transmission assembly 161 and the first transmission assembly 137 so as to drive the direction change of the transmission wheel 127; thus, the circuit board 2000 is conveyed by the multiple groups of adjusting mechanisms 125 to drive the circuit board 2000 to move and change the direction of the circuit board 2000 in the moving process, so that the circuit board 2000 is aligned with the reference edge 117, the whole board of the multiple circuit boards 2000 is realized, the image acquired by the station of the automatic optical detection mechanism at the rear section is accurately aligned with the standard image, the bad phenomena of false detection, missing detection and the like are reduced, and the detection efficiency is improved.

The specific structure of the adjustment mechanism 125 will be described below with reference to the drawings, but the adjustment mechanism 125 provided in the present application includes, but is not limited to, the following embodiments. The ordinary replacement of the following embodiments by those skilled in the art is within the scope of the present application.

Referring to fig. 2 and 4, the second transmission assembly 147 is disposed on a side of the transmission wheel 127 away from the conveying table 109. The first drive assembly 137 is located between the transfer table 109 and the second drive assembly 147. And a portion of the first driving assembly 137 is disposed in parallel with the driving wheel 127. The first transmission assembly 137 and the transmission wheel 127 are arranged in parallel to drive the transmission wheel 127 to rotate. Another part of the first transmission assembly 137 is disposed between a part of the first transmission assembly 137 and the second transmission assembly 147, and is used for meshing and connecting the second transmission assembly 147, so as to realize the linkage between the transmission wheel 127 and the second transmission assembly 147.

Referring to fig. 4 and 5, the third transmission assembly 155 is located on a side of the second transmission assembly 147 away from the transmission table 109. One end of the fourth transmission assembly 161 is connected to the first transmission assembly 137. The other end of the fourth transmission assembly 161 is located on the side of the third transmission assembly 155 away from the transmission table 109 after passing over the second transmission assembly 147 and the third transmission assembly 155.

As can be seen from the above design, the driving wheel 127, the first driving assembly 137, the second driving assembly 147, the third driving assembly 155 and the fourth driving assembly 161 are substantially arranged along the Z-axis direction, so that the adjusting mechanism 125 occupies a small space in the X-axis direction and the Y-axis direction, and thus a larger number of adjusting mechanisms 125 can be disposed below the conveying table 109, i.e., more driving wheels 127 are disposed below the conveying table 109, and more driving wheels 127 can provide a larger driving force and driving stability to drive a heavier or larger circuit board 2000, and further improve the conveying efficiency and conveying smoothness of the circuit board 2000. The adjusting mechanisms 125 occupy a small space in a plane range, and more adjusting mechanisms 125 are arranged in a limited plane range, so that the number of the driving wheels 127 is increased, the contact surface with the conveyed object is increased, the friction force to the conveyed object is further increased, and the conveying efficiency is improved.

Referring to fig. 4 and 5, the adjusting mechanism 125 further includes a supporting base 135. The supporting seat 135 is used for supporting the rotating shaft of the driving wheel 127. The plate alignment mechanism 100 also includes a mounting bracket 136. The fixing bracket 136 is fixedly connected to the machine 101. The adjustment mechanism 125 is fixedly mounted to the fixed bracket 136.

Referring to fig. 4 and 5, the first transmission assembly 137 includes a first spur gear 139, a second spur gear 141, and a first bevel gear 143.

Referring to fig. 4 to 6, the first straight gear 139 is coaxially connected to the driving wheel 127. The rotation axis of the transmission wheel 127 is parallel to the conveying table 109. For example, the rotation axis direction of the transmission wheel 127 may be arranged along the Y-axis direction. Of course, the driving wheel 127 can be disposed along the X-axis direction under the driving of the second driving assembly 189.

The first drive assembly 137 employs a multi-gear combination to provide a more stable overall adjustment mechanism 125 due to the longer life and better stability of the gears. Of course, in other embodiments, the first driving assembly 137 may be eliminated and driven by an additional motor directly connected to the rotating shaft of the driving wheel 127.

Referring to fig. 4 to 6, the second spur gear 141 is located on a side of the first spur gear 139 facing away from the conveying table 109. The direction of the rotation axis of the second spur gear 141 is parallel to the direction of the rotation axis of the first spur gear 139. The second spur gear 141 is in meshing connection with the first spur gear 139.

Referring to fig. 7, the second spur gear 141 is spaced apart from and disposed opposite to a portion of the supporting seat 135. The first bevel gear 143 is located in a gap between the second spur gear 141 and the support base 135, so that the gap is effectively utilized, and the compactness of the adjustment mechanism 125 is improved. The first bevel gear 143 is coaxially connected to the second spur gear 141. The first bevel gear 143 is engaged with the second transmission assembly 147.

Referring to fig. 4 to 6, the shaft of the first bevel gear 143 can be fixedly connected to the support base 135. In other words, the driving wheel 127, the supporting seat 135 and the first driving component 137 form a whole body, and the whole body can rotate together around the Z-axis direction.

Further, referring to fig. 7, the adjusting mechanism 125 further includes a first bearing 145, one end of the first bearing 145 is fixedly connected to the fixing bracket 136, and the other end of the first bearing 145 is sleeved on one end of the supporting base 135 away from the driving wheel 127, so that the supporting base 135 can be installed on the fixing bracket 136 and can rotate around the Z axis relative to the fixing bracket 136.

Referring to fig. 7, the gear radius of the second spur gear 141 is larger than the gear radius of the first straight gear 139, so that the larger the transmission ratio between the second spur gear 141 and the first straight gear 139 is, the smaller the space occupied by the first straight gear 139 is, and the space occupied by the entire adjusting mechanism 125 is further saved. Of course, in other embodiments, the gear radius of the second spur gear 141 may be equal to or smaller than the gear radius of the first spur gear 139.

Referring to fig. 7, the gear radius of the first bevel gear 143 is slightly larger than the gear radius of the second spur gear 141, so that the first bevel gear 143 can be engaged with the second transmission assembly 147, and the second transmission assembly 147 does not interfere with the rotation of the second spur gear 141.

Of course, in other embodiments, the first spur gear 139 and the second spur gear 141 may be replaced by other numbers of gears, rollers, or pulleys.

Referring to fig. 4, the second transmission assembly 147 includes a second bevel gear 149 and a third bevel gear 151 coaxially connected. The axial direction of the second bevel gear 149 is the Z-axis direction. The gear is arranged on the side of the transmission wheel 127 away from the conveying table 109. Specifically, a second bevel gear 149 is provided on a side of the support base 135 facing away from the transfer table 109. The second bevel gear 149 is spaced from the support base 135.

Referring also to fig. 6, the second bevel gear 149 is axially perpendicular to the transfer table 109. The second bevel gear 149 is engaged with the first bevel gear 143. The third bevel gear 151 is located on the side of the second bevel gear 149 facing away from the drive wheel 127. The third bevel gear 151 is engaged with the third transmission assembly 155.

The first bevel gear 143 and the second bevel gear 149 can also be driven by a magnetic wheel set, so that the second transmission assembly 137 can transmit power to the first transmission assembly 147 more efficiently.

Further, referring to fig. 4 and fig. 6, the adjusting mechanism 125 further includes a second bearing 153, one end of the second bearing 153 is fixedly connected to the fixing bracket 136, and the other end of the second bearing 153 is sleeved on the rotating shaft connected between the second bevel gear 149 and the third bevel gear 151, so that the second bevel gear 149 and the third bevel gear 151 can be mounted on the fixing bracket 136 and can rotate around the Z axis relative to the fixing bracket 136.

The second transmission assembly 147 is arranged to enable the second transmission assembly 147 to drive the first bevel gear 143 to rotate when rotating, and the rotation of the transmission wheel 127 is realized after the transmission of the first straight gear 139 and the second straight gear 141; meanwhile, when the second bevel gear 149 is not rotated, the support base 135 rotates around the Z-axis direction, and the first bevel gear 143 can also rotate around the second bevel gear 149, so as to change the direction of the transmission wheel 127.

Referring to fig. 4, the third transmission assembly 155 includes a driving shaft 157 and a fourth bevel gear 159 fixed to the periphery of the driving shaft 157. The axial direction of the driving shaft 157 is perpendicular to the axial direction of the second transmission assembly 147. Alternatively, the axial direction of the drive shaft 157 extends in the Y-axis direction. The fourth bevel gear 159 is engaged with the third bevel gear 151.

When the driving shaft 157 rotates by the first driving assembly 187, the fourth bevel gear 159 rotates in the Y-axis direction, the fourth bevel gear 159 drives the third bevel gear 151 to rotate in the Z-axis direction, the second bevel gear 149 rotates with the third bevel gear 151, the second bevel gear 149 drives the first bevel gear 143 to rotate, the second bevel gear 149 drives the second spur gear 141 to rotate, the second spur gear 141 drives the first spur gear 139 to rotate, and the first spur gear 139 drives the transmission gear 127 to rotate.

Referring to fig. 4, the fourth transmission assembly 161 includes a third spur gear 163, a rack 165 and a connecting rod 167.

The third spur gear 163 is located on a side of the third transmission assembly 155 facing away from the second transmission assembly 147. The rotation axis 179 of the third spur gear 163 is aligned with the rotation axis 179 of the second transmission assembly 147, so that the second transmission assembly 147 and the fourth transmission assembly 161 are compact in the Z-axis direction.

Further, referring to fig. 4 and fig. 6, the adjusting mechanism 125 further includes a third bearing 175, one end of the third bearing 175 is fixedly connected to the fixing bracket 136, and the other end of the third bearing 175 is sleeved on a rotating shaft connected to the third spur gear 163, so that the third spur gear 163 can be installed on the fixing bracket 136 and can rotate around the Z axis relative to the fixing bracket 136.

The rack 165 is disposed on one side of the third spur gear 163, and the rack 165 is engaged with the third spur gear 163. Specifically, the rack 165 is disposed along the Y-axis direction. Of course, in other embodiments, the third transmission assembly 155 may be driven to rotate by a direct motor connection, a motor connection link, a motor connection cam, or the like.

Further, referring to fig. 4, the plate adjusting mechanism 100 further includes a moving block 177. The rack gear 165 is provided on the moving block 177. The moving block 177 extends in the Y-axis direction. The second driving assembly 189 is connected to the moving block 177 to drive the moving block 177 to move along the Y axis direction, so as to drive the rack 165 to rotate along the Y axis direction, and further drive the third spur gear 163 to rotate, and the movement can be more stable through the driving mode of the rack 165 and the third spur gear 163.

One end of the connecting rod 167 is fixedly connected to one end of the supporting seat 135 away from the driving wheel 127. The other end of the connecting rod 167 passes over the second transmission assembly 147 and is fixedly connected to the rotating shaft of the third spur gear 163.

Specifically, referring to fig. 5, the connecting rod 167 includes a first rod 169, a second rod 171, and a third rod 173 connected in sequence.

Referring to fig. 5, the first rod 169 is parallel to the transfer table 109, or the first rod 169 intersects the transfer table 109. Further, the first bar 169 is parallel to the transfer table 109. One end of the first rod 169 is fixedly connected to one end of the supporting seat 135 far away from the driving wheel 127.

Referring to fig. 5, the second rod 171 is perpendicular to or intersects with the transfer table 109. Further, the second rod 171 is perpendicular to the transfer table 109. The second rod 171 is disposed along the Z-axis direction, and the second rod 171 is located at one side of the second transmission assembly 147. The second rod 171 is located on a side of the driving shaft 157 facing away from the fixed bracket 136.

Referring to fig. 5, the third rod 173 is parallel to the transfer table 109, or the third rod 173 intersects the transfer table 109. Further, the third rod 173 is disposed parallel to the transfer table 109. The third rod 173 is located on a side of the first rod 169 facing away from the transfer table 109, and the third rod 173 is disposed opposite to the first rod 169. The second rod 171 is connected between the first rod 169 and the third rod 173. The third rod 173 is fixedly connected to the rotating shaft of the third spur gear 163.

Referring to fig. 4 and 5, when the moving block 177 moves forward or backward along the Y axis under the action of the second driving assembly 189, the moving block 177 drives the rack 165 to move along the Y axis. The rack gear 165 rotates the third spur gear 163 about the Z-axis. The third spur gear 163 drives the connecting rod 167 to rotate around the Z axis, and the connecting rod 167 drives the supporting seat 135, the driving wheel 127 disposed on the supporting seat 135, the first spur gear 139 connected to the driving wheel 127, the second spur gear 141, and the first bevel gear 143 to rotate around the Z axis, wherein the first bevel gear 143 rotates along the circumference of the second bevel gear 149 in the rotating process.

The above embodiment exemplifies the structure of the set of adjustment mechanisms 125. Referring to fig. 2 and 3, the plate adjusting mechanism 100 includes a plurality of adjusting mechanisms 125. The plurality of sets of adjustment mechanisms 125 are arranged in a plurality of rows and columns. The drive shafts 157 of each of the adjustment mechanisms 125 in each row are connected in line to form a single axis of rotation 179 extending in the row direction. In other words, the drive shafts 157 of the plurality of adjustment mechanisms 125 are the same, and the drive shaft 157 is defined as the rotation shaft 179. The rotating shaft 179 extends in the Y-axis direction. The plurality of rotation shafts 179 may be arranged in parallel and spaced apart along the X-axis direction. A plurality of rows of adjustment mechanisms 125 are provided on the plurality of rotational shafts 179. One side of the rotation shaft 179 is fixedly attached to the first support base 105, and the other side of the rotation shaft 179 is fixedly attached to the second support base 107. The end of the rotating shaft 179 remote from the first support table 105 is provided with a fifth bevel gear 183. The plate-adjusting mechanism 100 further comprises a power shaft 181. The power shaft 181 extends in a direction perpendicular to the direction in which the rotating shaft 179 extends. The power shaft 181 is provided on the second support table 107 and is disposed along the X-axis direction. A plurality of sixth bevel gears 185 arranged at intervals are arranged on the power shaft 181. Each of the sixth bevel gears 185 is in meshing engagement with one of the fifth bevel gears 183.

Referring to fig. 2 and fig. 3, a rotating shaft of the first driving assembly 187 is connected to the power shaft 181 to drive the power shaft 181 to rotate. In the process that the power shaft 181 rotates around the X-axis direction, the sixth bevel gear 185 provided on the power shaft 181 rotates around the X-axis direction along with the power shaft 181. The plurality of fifth bevel gears 183 are rotated in the Y-axis direction by the sixth bevel gear 185, and the plurality of rows of rotating shafts 179 are rotated in the Y-axis direction by the fifth bevel gears 183. For each adjustment mechanism 125, the fourth bevel gear 159 is rotated about the Y-axis by the rotation shaft 179. The fourth bevel gear 159 drives the third bevel gear 151 and the second bevel gear 149 to rotate around the Z axis in the process of rotating around the Y axis, the second bevel gear 149 drives the first bevel gear 143 to rotate, and the first bevel gear 143 drives the first straight gear 139 and the second straight gear 141 to rotate, so as to drive the transmission wheel 127 to rotate.

Since each of the sixth bevel gears 185 is identical in structure and size and each of the fifth bevel gears 183 is identical in structure and size, the first drive assembly 187 rotates the rotational shafts 179 of each row in synchronization. Because the structure of each adjusting mechanism 125 is the same, the driving wheel 127 of each adjusting mechanism 125 is driven to rotate synchronously. In other words, the plate-adjusting mechanism 100 provided in the embodiment of the present application can drive the transmission wheels 127 of the plurality of adjusting mechanisms 125 to rotate synchronously through the first driving assembly 187.

Referring to fig. 3, the rack 165 of each row of adjusting mechanisms 125 is disposed on the same moving block 177, and the second driving component 189 is connected to the moving block 177 and drives the moving block 177 to move forward or backward along the Y axis, so as to drive the racks 165 of the row of adjusting mechanisms 125 to move along the Y axis synchronously, so that the driving wheels 127 of the row are deflected by the same angle. Therefore, the transmission wheel 127 in a partial area can be controlled to deflect, and the transmission direction of the circuit board 2000 is further changed; to move the wiring board 2000 toward the reference edge 117. The deflection angle of the driving wheel 127 can be controlled by controlling the distance of the second driving component 189 for driving the moving block 177 to move, so that the transmission direction of the circuit board 2000 can be adjusted.

In the embodiment, for the adjusting mechanism 125, the driving shaft 157 transmits the power of the first driving assembly 187 to the fourth bevel gear 159, and transmits the power to the second bevel gear 149 through the third bevel gear 151 in meshed connection, and the second bevel gear 149 transmits the power to the first bevel gear 143, then transmits the power to the first spur gear 139 through the second spur gear 141, and finally transmits the power to the driving wheel 127, so that the driving wheel 127 rolls; the second driving assembly 189 changes the position of the third spur gear 163 through the rack 165, and correspondingly changes the position of the supporting seat 135 of the transmission wheel 127 through changing the position of the connecting rod 167, thereby finally achieving the purpose of changing the direction to the transmission wheel 127.

For the adjusting mechanism group 123, a plurality of adjusting mechanisms 125 are mounted on the same driving shaft 157 to constitute the adjusting mechanism group 123. Specifically, the rotating shaft 179 is provided with a plurality of adjusting mechanisms 125, the rotating shaft 179 is mounted on two bearing seats of the fixing bracket 136, and the two bearing seats of the fixing bracket 136 are connected and mounted through a connecting plate. All the transmission wheels 127 on the adjusting mechanism set 123 have the same transmission speed and angle, so that the transmission stability is ensured. The second driving assembly 189 adjusts the transferring direction of the whole adjusting mechanism set 123 by the rack gear 165 cooperating with the third spur gear 163.

In the adjusting mechanism assembly 121, a plurality of adjusting mechanism sets 123 are combined, all the adjusting mechanism sets 123 are driven by one power shaft 181 to operate, the angle of each adjusting mechanism set 123 can be controlled as a whole, and the reference edge 117 is collected as the initial X-axis direction position after the plate is completed. Wherein, a plurality of sets of adjusting mechanism sets 123 are installed on the machine platform 101, the first driving component 187 drives the power shaft 181 to provide power, the power is transmitted to each adjusting mechanism set 123 through a plurality of sets of fifth bevel gears 183-sixth bevel gears 185, all the driving wheels 127 move forwards synchronously, and simultaneously, the angle of the driving wheel 127 is adjusted through the second driving component 189 by matching with each set of adjusting mechanism sets 123, so that the circuit board 2000 gradually approaches to the reference edge 117. When the edge of the circuit board 2000 corresponding to the position of the group of adjusting mechanisms 123 reaches the reference edge 117, the sensor 119 corresponding to the group is triggered to send a signal, the second driving assembly 189 corresponding to the group of adjusting mechanisms 123 is controlled to change the angle of the driving wheel 127 to be parallel to the reference edge 117, each group of adjusting mechanisms 123 individually controls the angle, finally, the edge of the whole circuit board 2000 is flush with the reference edge 117, and finally, the circuit board 2000 is parallel to the X-axis direction reference edge 117 and conveyed to a station corresponding to the detecting mechanism.

In the embodiment of the application, the independent adjusting mechanism 125 is formed by combining a plurality of groups of gears and racks 165, so that the autorotation transmission of the transmission wheel 127 can be realized, the horizontal angle adjustment of the transmission wheel 127 can also be realized, the synchronous transmission line board 2000 in the X-axis and Y-axis directions can be realized, the problems of angle and size change and the like of various incoming materials of the line board 2000 can be compatibly adapted, and the board finishing efficiency is effectively improved; in addition, the plate-arranging mechanism 100 provided by the embodiment of the application has a simple structure, each adjusting mechanism group 123 can change the horizontal angle only by one driving force in the Y-axis direction, and simultaneously, the plate-arranging and conveying can be realized by the rotation of all conveying wheels only by one driving force in the X-axis direction.

The embodiment of the present application adopts the adjusting mechanism 125 formed by combining the gear-gear combination and the gear-rack combination to realize the rotation and angle adjustment of the transmission wheel, and other principles and basic structures which are the same as or similar to those of the present application are within the protection scope of the present application.

In the second aspect, specific structures of the fifth wheel mechanism 300 will be described below with reference to the drawings, but the fifth wheel mechanism 300 provided in the present application includes, but is not limited to, the following embodiments. The ordinary replacement of the following embodiments by those skilled in the art is within the scope of the present application.

Referring to fig. 1 and 8, the optical inspection apparatus 1000 further includes a connecting wheel mechanism 300 connected between the pressing wheel mechanism 400 and the plate adjusting mechanism 100. The fifth wheel mechanism 300 includes a table 305, and the fifth wheel mechanism 300 is provided on the table 305.

Referring to fig. 1 and 8, the connecting wheel mechanism 300 includes a plurality of rollers 301. The plurality of rollers 301 extend in the Y-axis direction, and the plurality of rollers 301 are arranged in parallel in the X-axis direction. The conveying surface 113 formed by the rollers 301 is coplanar with the conveying surface 113 on the conveying table 109, so that the circuit board 2000 conveyed by the board finishing mechanism 100 is conveyed to the connecting wheel mechanism 300, the circuit board 2000 can continue to be driven forwards under the action of the driving wheel 127, and the resistance of the circuit board 2000 to be conveyed forwards is small due to the rolling of the connecting wheel mechanism 300. A pinch roller mechanism 400 is connected to the discharge end of the fifth wheel mechanism 300. The driving wheel 127 can transfer the circuit board 2000 to the pinch roller mechanism 400 so that the transfer mechanism 600 can pick up the circuit board 2000.

In the third aspect, specific structures of the pressing wheel mechanism 400 are described below with reference to the drawings, but the pressing wheel mechanism 400 provided in the present application includes, but is not limited to, the following embodiments. The ordinary replacement of the following embodiments by those skilled in the art is within the scope of the present application.

In the traditional technology, a power roller combination or a power belt is adopted as a pressing wheel mechanism. These two types of roller mechanisms have at least the following disadvantages: 1. performance aspects: the speed of the power roller or the speed of the power belt is unequal to the transmission speed, so that the phenomena of slipping, contusion and the like of the circuit board when passing through the acquisition area are caused, the accuracy of image acquisition is influenced, and the detection result is influenced. 2. Roller processing and cost: for the roller type transmission, the requirement of the equipment on the full run-out tolerance of the roller processing is calculated to be very high according to the parameters of the detection camera and the detection precision requirement, the standard specification size of an industrial circuit board is 28 inches in width, the roller processing with the length is very difficult to achieve the processing precision run-out, and the cost is very high (for example, the roller size: the diameter is 45mm, the length is 950mm, and the full run-out tolerance is within 0.01 mm). 3. Service life aspect: after the roller is used for a long time, the roller is influenced by load and self stress deformation, and the full run-out tolerance is gradually increased, so that the roller is scrapped and needs to be replaced, and the service life is short; the belt material is polyurethane belt or the belt of other materials, and long-time and circuit board friction conveying pass the board, lead to the belt wearing and tearing easily, often need change, life is short. 4. Efficiency and debugging aspects: the gap and the parallelism between the power roller or the power belt and the circuit board are difficult to adjust and are affected by the unevenness of the circuit board, the gap between the roller or the belt and the circuit board is often required to be adjusted, and the production efficiency is low.

The embodiment of the application provides a pressing wheel mechanism 400 which can ensure the flatness of a circuit board 2000, so that the problem of unstable performance caused by the problems of camera blurring and the like caused by the unevenness of the circuit board 2000 in an acquisition area is solved, the cost is low, the service life is short, and the performance is stable.

Referring to fig. 9, a pressing wheel mechanism 400 is used to flatten the circuit board 2000.

Referring to fig. 9, the pinch roller mechanism 400 includes a pinch roller assembly 409 and a support roller assembly 423.

Referring to fig. 1 and 8, the pressing wheel assembly 409 and the supporting wheel assembly 423 are located on the same side of the conveying mechanism 600. Specifically, the pinch roller assembly 409 and the support roller assembly 423 are arranged in the Z-axis direction. The pinch roller assembly 409 and the support wheel assembly 423 are arranged oppositely and at intervals, and a first interval formed between the pinch roller assembly 409 and the support wheel assembly 423 is used for conveying a plate (such as a circuit board 2000).

The pressing wheel assembly 409 and the supporting wheel assembly 423 are respectively used for being pressed on two opposite sides of the circuit board 2000. The puck assembly 409 includes a first puck group 411 and a second puck group 417. The second press wheel group 417 is close to the transfer mechanism 600 with respect to the first press wheel group 411. The support wheel assembly 423 includes a first support wheel set 425 and a second support wheel set 429. The first pressing wheel set 411 is disposed opposite to the first supporting wheel set 425, and in the conveying direction (X-axis direction) of the circuit board 2000, the first pressing wheel set 411 is located between the first supporting wheel set 425 and the second supporting wheel set 429.

The first pressing wheel set 411 and the second pressing wheel set 417 are arranged on the upper side of the circuit board 2000, the first supporting wheel set 425 and the second supporting wheel set 429 are arranged on the lower side of the circuit board 2000, and the circuit board 2000 is pressed from the upper side and the lower side so that the circuit board 2000 is flat relative to the horizontal plane.

Further, referring to FIG. 9, the first pressing wheel set 411 includes a plurality of first pressing wheels 415 arranged along the Y-axis direction. First elastomeric cushion 413 is also attached to each first puck 415, and first elastomeric cushion 413 enables first puck 415 to have space to move in the Z-axis direction. Similarly, the second press wheel set 417 includes a plurality of second press wheels 421 arranged along the Y-axis direction. A second elastic buffer 419 is connected to each second press wheel 421, and the second elastic buffer 419 can make the second press wheel 421 have a movable space in the Z-axis direction.

Specifically, the first elastic buffer 413 includes, but is not limited to, a spring, an elastic plastic column, an elastic rubber column, an elastic metal sheet, an elastic plastic sheet, and the like, and the elasticity can also be realized by the principle that like poles of magnets repel each other. The number of the first elastic buffers 413 may be one, two, or the like, and the first elastic buffers 413 are used for adjusting the height of the pressing wheel in the Z-axis direction. Accordingly, the second elastic buffer 419 includes but is not limited to a spring, an elastic plastic column, an elastic rubber column, an elastic metal sheet, an elastic plastic sheet, etc., and can also realize elasticity by the principle that like poles of magnets repel each other. The first and second elastic buffers 413 and 419 are used to enable the first and second pinch roller sets 411 and 417 to be pressed on the circuit board 2000 with different thicknesses.

Referring to fig. 9, the first supporting wheel set 425 includes a plurality of first supporting wheels 427 arranged along the Y-axis direction. Optionally, a first elastic buffer 413 is further connected to each first support wheel 427, and the first elastic buffer 413 can enable the first support wheel 427 to have a movable space in the Z-axis direction.

Referring to fig. 9, the second supporting wheel set 429 includes a plurality of second supporting wheels 431 arranged along the Y-axis direction. Optionally, a second elastic buffer 419 is further connected to each second support wheel 431, and the second elastic buffer 419 enables the second support wheel 431 to have a space movable in the Z-axis direction.

Through being equipped with elastic buffer at every pinch roller department to make every pinch roller all can be flexible in Z axle direction, and then make pinch roller mechanism 400 can pressfitting circuit board 2000 of different thickness. The second press wheel group 417 and the second support wheel group 429 are arranged in a staggered manner, so that circuit boards 2000 with different thicknesses can be transmitted to the second support wheel group 429 and then transmitted to the second press wheel group 417, and the height of the second press wheel 421 in the Z-axis direction can be adjusted in order to adapt to the thickness of the circuit boards 2000; after the adjustment is completed, the circuit board 2000 enters between the first pressing wheel set 411 and the first supporting wheel set 425 again, and the second pressing wheel set 417 and the second supporting wheel set 429 can position the circuit board 2000, so that the circuit board 2000 can directly enter between the first pressing wheel set 411 and the first supporting wheel set 425, and the height of the first pressing wheel 415 of the first pressing wheel set 411 in the Z-axis direction can be adjusted while entering to stably press the circuit board 2000.

In the fourth aspect, specific structures of the detection mechanism 800 are described below with reference to the drawings, but the detection mechanism 800 provided in the present application includes, but is not limited to, the following embodiments. The ordinary replacement of the following embodiments by those skilled in the art is within the scope of the present application.

Referring to fig. 1, the detecting mechanism 800 is disposed on the machine 305. The detection mechanism 800 is used to detect the quality of the wiring board 2000 during the transfer of the wiring board 2000. The structure of the detection mechanism 800 is exemplified in the present application, but the present application includes, but is not limited to, the detection mechanism 800 provided in the following embodiments.

Referring to fig. 1 and 10, the detecting mechanism 800 includes a first detecting mechanism 801 and a second detecting mechanism 831. The second detecting mechanism 831 can be arranged on two opposite sides of the collecting area in a mirror image manner with the first detecting mechanism 801. The first detection mechanism 801 and the second detection mechanism 831 can simultaneously detect the upper side and the lower side of the circuit board 2000, so as to simultaneously detect the defects of the board surfaces on the two sides of the circuit board 2000 and improve the detection efficiency. Of course, the first detection mechanism 801 and the second detection mechanism 831 may detect separately. In other embodiments, the first detecting mechanism 801 and the second detecting mechanism 831 may be located on a side of the collecting area away from the ground or a side of the collecting area close to the ground, so that the first detecting mechanism 801 and the second detecting mechanism 831 can detect one board surface of the circuit board 2000 from different angles, thereby improving the detection accuracy.

Referring to fig. 1, 10 and 11, the first detecting mechanism 801 is disposed on a side of the pressure roller assembly 409 away from the circuit board 2000. The second detecting mechanism 831 is disposed on a side of the supporting wheel assembly 423 away from the circuit board 2000. In other words, the first detecting mechanism 801, the pinch roller assembly 409, the supporting wheel assembly 423, and the second detecting mechanism 831 are sequentially disposed along the Z-axis direction. Thus, the detection mechanism 800 and the pressing wheel mechanism 400 are stacked along the Z-axis direction, so that the space of the optical detection device 1000 in the X-axis direction can be effectively saved, and the pressing wheel mechanism 400 can press the circuit board 2000 flatly to provide convenience for the detection process of the detection mechanism 800. The region between the first detection mechanism 801 and the second detection mechanism 831 is a collection region or a detection region.

In the process of holding the wiring board 2000 by the transfer mechanism 600 and transferring the wiring board 2000 at a certain speed to the X-direction, the first detection mechanism 801 may detect a defect of the first surface of the wiring board 2000 in the form of a picked-up image. The second detection mechanism 831 can detect a defect of the second surface of the wiring board 2000 by the form of a picked-up image. Therefore, the speed of collecting the images by the detection mechanism 800 is matched with the transmission speed of the circuit board 2000, the definition of the collected images is guaranteed, and the authenticity of the detected defects is further guaranteed.

Referring to fig. 11, the first detecting mechanism 801 further includes a detecting mounting seat 803, a detecting adjusting shaft 805, at least one camera assembly, a coaxial light source 827 and at least one side light source 829. The plurality of camera assemblies may be arranged in the Y-axis direction. A plurality of camera components may be fixed on the inspection mount 803 via the inspection adjustment shaft 805, and the inspection adjustment shaft 805 may adjust the height of the plurality of camera components with respect to the inspection mount 803 as a whole or individually.

Referring to fig. 12, the camera assembly includes a camera mounting seat 807, a camera angle adjusting seat 811, a camera X-axis adjusting seat 817 and a camera 835, which are sequentially connected along the Z-axis in a reverse direction. The camera 835 includes a lens holder 833 and a lens 825. The test mounting seat 803 is disposed on the machine 305 (see fig. 13). The camera mount 807 is provided on the inspection adjustment shaft 805. The detection adjustment shaft 805 is used to drive the camera mount 807 to move along the Z-axis in the forward direction or direction.

Referring to fig. 13, the camera mounting seat 807 and the camera angle adjustment seat 811 form an angle adjustment device, and the camera angle adjustment seat 811 is provided with a plurality of angle adjustment guide grooves 815. The plurality of angle adjustment guide grooves 815 may be arc-shaped grooves. The rotation centers of the plurality of angle adjustment guide grooves 815 coincide with the center of the camera 835 (i.e., the rotation centers of the plurality of angle adjustment guide grooves 815 are located on the central axis of the lens 825). The camera mount 807 is provided with a plurality of angle adjustment guide bosses 813, and each angle adjustment guide boss 813 is disposed in one angle adjustment guide groove 815 and can slide in the angle adjustment guide groove 815. The rotation centers of the plurality of angle adjustment guide bosses 813 coincide with the center of the camera 835 (i.e., the rotation centers of the plurality of angle adjustment guide bosses 813 are located on the central axis of the lens 825). The camera angle adjustment mount 811 may be rotated relative to the camera mount 807 to rotate the camera 835 to a suitable angle in the horizontal plane. The camera mount 807 is also provided with an angular adjustment fixing location 809. After the angle of the camera angle adjusting base 811 is adjusted to a proper position, the camera angle adjusting device is fixed at the angle adjusting fixing position 809 by screws.

Referring to fig. 14, the camera angle adjusting base 811 is mounted on the camera X-axis adjusting base 817, and the camera angle adjusting base 811 and the camera X-axis adjusting base 817 form a camera X-direction adjusting device. An X-axis direction adjustment guide boss 819 is provided on the camera angle adjustment base 811, and an X-axis direction adjustment guide groove 821 is provided on the camera X-axis adjustment base 817. The X-axis direction adjustment guide boss 819 is slidable along the X-axis direction adjustment guide groove 821 to slide the camera 835 along the X-axis. An X-axis direction adjusting and fixing position 823 is arranged on the X-axis adjusting seat 817 of the camera. When the camera 835 is adjusted to a proper position in the X direction, the X direction angle adjusting means is fixed by screws to the X axis direction adjusting fixing position 823 of the camera X axis adjusting mount 817.

The above can realize the position adjustment of the camera 835 in the X-axis direction and the angular adjustment around the Z-axis direction.

Further, the optical detection apparatus 1000 further includes a thickness measuring sensor (not shown), which may be disposed on the detection mounting seat 803. The thickness measuring sensor may emit a detection signal toward the board surface of the circuit board 2000 in the Z-axis direction. The detection signal includes, but is not limited to, an infrared light signal, a laser light signal, and the like. The thickness measuring sensor detects the thickness of the wiring board 2000 by detecting a distance from the board surface of the wiring board 2000, so that the detection adjustment shaft 805 adjusts the distance between the camera 835 and the wiring board 2000 according to the thickness of the wiring board 2000. The camera adjustment means 809 is used to adjust the axial direction of the lens 825. A coaxial light source 827 and a side light source 829 are both disposed on the inspection mounting block 803. The coaxial light source 827 emits light in the axial direction of the lens 825. The side light source 829 is disposed between the lens 825 and the circuit board 2000, and the side light source 829 emits light in the Y-axis direction. The coaxial light source 827 and the side light source 829 are combined to form a light source system, and the light source system is used for supplementing light when the camera 835 collects images. The coaxial light source 827 and the side light source 829 are also disposed on the inspection adjusting shaft 805, and can move along the Z-axis along with the camera mount 807 and the lens 825 to adjust the working height of the camera 835 according to the circuit board 2000 with different board thicknesses. In particular, the camera adjusting means 809 is provided with adjusting means in the X direction and the angular direction (the angular direction is a direction around the Z axis). In other words, the cameras 835 may be adjusted in the X-direction, Z-direction, and angular direction to all cameras 835 with the same resolution and sharpness so that the operating states of all cameras 835 are consistent.

By designing the first detection mechanism 801 and the second detection mechanism 831, the upper surface and the lower surface of the circuit board 2000 can be detected simultaneously, and the detection efficiency can be improved. The first detecting mechanism 801 and the second detecting mechanism 831 are each composed of a plurality of identical line scanning cameras, line scanning lenses and light source systems, wherein the first detecting mechanism 801 is mounted on the detecting mounting seat 803, the collecting height of the circuit boards 2000 with different board thicknesses can be automatically adjusted, the second detecting mechanism 831 is fixed on the workbench 305, at least part of the second detecting mechanism 831 is arranged in the workbench 305, and the collecting height of the second detecting mechanism 831 is fixed. Each camera is arranged on the camera adjusting device 809, and the camera adjusting device 809 is provided with adjusting devices in the X direction, the Z direction and the angle direction, so that all the cameras can be adjusted to the same working state, and the resolution and the definition are consistent.

The circuit board 2000 is held by the transfer mechanism 600, and the circuit board 2000 is transferred at a constant speed or at an actual speed with high accuracy from a desired theoretical speed. While being conveyed in the X forward direction, the first detection mechanism 801 may detect a defect of the first surface of the wiring board 2000 by the form of a picked-up image. The second detection mechanism 817 can detect defects of the second surface of the wiring board 2000 by the form of the captured image. Therefore, the speed of collecting the images by the detection mechanism 800 is matched with the transmission speed of the circuit board 2000, the definition of the collected images is guaranteed, and the authenticity of the detected defects is further guaranteed.

In the fifth aspect, specific structures of the conveying mechanism 600 are illustrated below with reference to the drawings, and of course, the conveying mechanism 600 provided in the present application includes, but is not limited to, the following embodiments. The ordinary replacement of the following embodiments by those skilled in the art is within the scope of the present application.

Referring to fig. 15, the transmission mechanism 600 is disposed at the rear section of the pressing wheel mechanism 400 to clamp the circuit board 2000 flattened by the pressing wheel mechanism 400. The first conveying assembly 611 and the second conveying assembly 633 of the conveying mechanism 600 are used for alternately conveying the circuit board 2000 and the circuit board 2000 to the blanking conveying mechanism 900.

Referring to fig. 16, the transferring mechanism 600 includes a frame 601, a first transferring assembly 611, a second transferring assembly 633 and a controller (not shown).

Referring to fig. 16, the frame 601 includes a first side plate 603 and a second side plate 605 disposed along opposite sides. The first side panel 603 and the second side panel 605 may be disposed in parallel or non-parallel arrangement.

Referring to fig. 16 and 17, a pair of first guide rails 607 is disposed on the frame 601. The pair of first guide rails 607 may extend in the X-axis direction or approximately in the X-axis direction. A pair of first guide rails 607 are respectively provided on the first side plate 603 and the second side plate 605. The frame 601 is further provided with a pair of second guide rails 609. The pair of second guide rails 609 may extend in the X-axis direction or approximately in the X-axis direction. The pair of first guide rails 607 and the pair of second guide rails 609 may be arranged in the opposite direction along the Z-axis. A pair of first guide rails 607 and a pair of second guide rails 609 may also be arranged in the Z-axis forward direction. A pair of second guide rails 609 are provided on the first side plate 603 and the second side plate 605, respectively.

Referring to fig. 16 and 17, the first transferring assembly 611 is disposed on the frame 601. The first transfer assembly 611 may extend generally in the Y-axis direction. The first transfer module 611 is used to hold and transfer the circuit board 2000. The opposite ends of the first conveying assembly 611 are slidably connected to a pair of first guide rails 607, respectively. The first conveying assembly 611 can slide along the frame 601 under the driving of an external force to convey the circuit board 2000 from the front section of the conveying mechanism 600 to other structures (such as a blanking conveying mechanism, which will be described in detail later). Specifically, the first transmission assembly 611 may be driven by a precise high-speed transmission mechanism such as a motor, a ball screw, a linear motor, etc. to slidably connect the pair of first guide rails 607.

Referring to fig. 18 and 19, the first conveying assembly 611 includes a first holder 613 and at least one first clamp 615 disposed on the first holder 613. The first jig base 613 is disposed in the Y-axis direction. The opposite ends of the first clamp seat 613 are slidably connected to the frame 601. The first clamp 615 is used to clamp the board (i.e., the circuit board 2000).

Referring to fig. 16 and 17, the second conveying assembly 633 is disposed on the frame 601. The second conveying assembly 633 may extend generally in the Y-axis direction. The second transfer unit 633 is used to hold and transfer the circuit board 2000. A pair of second guide rails 609 are slidably connected to opposite ends of the second conveying assembly 633 respectively. The second conveying assembly 633 can slide along the frame 601 under the driving of external force to convey the circuit board 2000 from the front section of the conveying mechanism 600 to other structures (such as a blanking conveying mechanism). Specifically, the second conveying assembly 633 can be driven by a precise high-speed transmission mechanism such as a motor, a ball screw, a linear motor, etc. to slidably connect the pair of second guide rails 609. The second conveying assembly 633 is disposed in a staggered manner from the first conveying assembly 611 in the Z-axis direction. The sliding direction of the first conveying assembly 611 and the sliding direction of the second conveying assembly 633 are both X-axis directions (including X-axis forward direction or X-axis reverse direction).

Referring to fig. 20 and 21, the second conveying assembly 633 includes a second fixture base 635 and at least one second fixture 637 disposed on the second fixture base 635. The second jig base 635 is disposed in the Y-axis direction. The opposite ends of the second clamp seat 635 are slidably connected to the frame 601. The sliding rail of the second jig block 637 (in the X-axis direction) and the sliding rail of the first jig block 613 (in the X-axis direction) are provided at intervals in the Z-axis direction. The second fixture 637 is configured to clamp the plate (i.e., the circuit board 2000), the second fixture 637 is disposed on a side of the second fixture seat 635 close to the first fixture seat 613, and the first fixture 615 is disposed on a side of the first fixture seat 613 close to the second fixture seat 635.

The first conveying assembly 611 is arranged to be slidable along a pair of first guide rails 607 through a first clamp seat 613, and the second conveying assembly 633 is arranged to be slidable along a pair of second guide rails 609 through a second clamp seat 635, wherein the first guide rails 607 and the second guide rails 609 are arranged at intervals in the Z-axis direction; by disposing the first fixture 615 on the side of the first fixture seat 613 close to the second conveying assembly 633 and disposing the second fixture 637 on the side of the second fixture seat 635 close to the first conveying assembly 611, the first fixture 615 and the second fixture 637 are located at a similar height, so that the distance that the first fixture 615 and the second fixture 637 move in the Z-axis direction can be reduced in the process of clamping the circuit board 2000 by the first fixture 615 and the second fixture 637, that is, the first fixture 615 and the second fixture 637 can clamp the board (that is, the circuit board 2000), the clamping time of the first conveying assembly 611 and the second conveying assembly 633 can be saved, the clamping speed can be increased, and the conveying efficiency of the conveying mechanism 600 can be increased.

Alternatively, the first conveying assembly 611 and the second conveying assembly 633 may be driven by a belt-motor combination to slidably connect the first side plate 603 and the second side plate 605.

Optionally, the controller is connected to the motor driving the first conveying assembly 611 and the motor driving the second conveying assembly 633. The controller is used for controlling the first transmission assembly 611 and the second transmission assembly 633 to alternately transmit the circuit board 2000. The controller may be an integrated chip, and is disposed on a circuit board, which is fixed to the machine 601 or other positions of the optical detection device. The present application is not limited to the specific structure and location of the controller.

In this embodiment, referring to fig. 17, the transmission mechanism 600 further includes a first motor 641 (which is shielded by the first side plate 603 in fig. 17, refer to fig. 23), at least one first transmission belt 643, at least two first transmission wheels 642 and a first transmission shaft 645. In the present embodiment, only two first transmission belts 643 and four first transmission wheels 642 are taken as an example for explanation, and the number of the first transmission belts 643 is not limited to two in the present application, and the number of the first transmission wheels 642 is four. Specifically, the first drive pulley 642 is a timing pulley. The first driving wheel 642 may be a pulley, a steel pulley, or the like. Specifically, the first belt 643 is a synchronous belt. The first transmission belt 643 may be a belt or a steel belt.

The first motor 641 is disposed on a side of the first side plate 603 facing away from the second side plate 605 to reduce interference with the processes of the first conveying assembly 611 and the second conveying assembly 633. Of course, in other embodiments, the position of the first motor 641 may also be disposed on a side of the second side plate 605 facing away from the first side plate 603. Of course, the first motor 641 may be replaced by another power assembly capable of driving the first transmission shaft 645 to rotate.

Referring to fig. 17, the first transmission shaft 645 is disposed along the Y-axis direction, most of the first transmission shaft 645 is disposed between the first side plate 603 and the second side plate 605, one end of the first transmission shaft 645 penetrates through the first side plate 603 and is directly or indirectly connected to the rotating shaft of the first motor 641, and the other end of the first transmission shaft 645 is rotatably connected to the second side plate 605. Thus, the first transmission shaft 645 can rotate under the driving of the first motor 641.

Referring to fig. 17, the first transmission shaft 645 may be disposed near the feeding end of the conveying mechanism 600, and may also be disposed near the discharging end of the conveying mechanism 600. In this embodiment, the first transmission shaft 645 is disposed near the discharging end of the conveying mechanism 600 to reduce interference with the clamping of the plate (i.e., the circuit board 2000) by the conveying mechanism 600 at the feeding end.

Referring to fig. 17, the first driving wheel 642 is disposed at one end of the first transmission shaft 645 connected to the first side plate 603, and the second first driving wheel 642 is disposed at a position of the first side plate 603 near the feeding end. The first driving wheel 642 and the second driving wheel 642 are axially arranged along the Y-axis direction, and both the first driving wheel 642 and the second driving wheel 642 can rotate relative to the first side plate 603.

Referring to fig. 17, both ends of a first driving belt 643 are mounted on a first driving wheel 642 and a second first driving wheel 642. When the first motor 641 drives the first transmission shaft 645 to rotate, the first transmission shaft 645 drives the first transmission wheel 642 to rotate, the first transmission wheel 642 drives the first transmission belt 643 to transmit, and the first transmission belt 643 also drives the second first transmission wheel 642 to rotate during transmission.

In this way, the rotation shaft of the first motor 641, the first transmission shaft 645, the two first transmission wheels 642, and the first transmission belt 643 rotate synchronously.

In one embodiment, a first driving wheel 642 and a first driving belt 643 may be disposed on both sides of the first side plate 603 and the second side plate 605. In other words, the first motor 641 transmits the power for moving the first transmission assembly 611 at both ends of the first transmission assembly 611.

Specifically, on the basis that the first driving wheel 642, the second first driving wheel 642 and the first driving belt 643 are disposed on the side of the first side plate 603, the second first driving wheel 642, the third first driving wheel 642 and the fourth first driving wheel 642 are disposed on the side of the second side plate 605. Although the second, third and fourth first driving wheels 642, 642 and 642 are shielded by the second side plate 605, the arrangement of the second, third and fourth first driving wheels 642 and 642 can refer to the arrangement of the first driving wheel 642, the first driving wheel 642 and the second first driving wheel 642.

Specifically, the third first driving wheel 642 is disposed at one end of the first transmission shaft 645 connected to the first side plate 603, and the fourth first driving wheel 642 is disposed at a position of the first side plate 603 near the feeding end. The third first driving wheel 642 and the fourth first driving wheel 642 are axially arranged along the Y-axis direction, and the third first driving wheel 642 and the fourth first driving wheel 642 are rotatable relative to the first side plate 603.

Specifically, both ends of the second first driving belt 643 are mounted on the third first driving wheel 642 and the fourth first driving wheel 642. When the first motor 641 drives the first transmission shaft 645 to rotate, the first transmission shaft 645 drives the third first transmission wheel 642 to rotate, the third first transmission wheel 642 drives the second first transmission belt 643 to transmit, and the second first transmission belt 643 also drives the fourth first transmission wheel 642 to rotate during transmission.

In this way, the rotation shaft of the first motor 641, the first transmission shaft 645, the four first transmission wheels 642, and the two first transmission belts 643 rotate synchronously.

The first motor 641 drives the first transmission belt 643 to move in a clockwise direction or a counterclockwise direction. The first transmission assembly 611 is connected to the first transmission belt 643 to move along the X-axis forward direction or the X-axis reverse direction under the driving of the first motor 641. Opposite ends of the first transmission assembly 611 are respectively connected to two first transmission belts 643, so that the first motor 641 can control the speed of the first transmission assembly 611 with high precision through the first transmission shaft 645, the first transmission wheel 642 and the first transmission belts 643.

Particularly, in an application scenario requiring extremely precise transmission speed, for example, in the optical detection device of the circuit board 2000, if the speed of the circuit board 2000 during the detection process is not matched with the speed detected by the optical detection device, the image acquired by the optical detection device may be blurred, and further, problems such as detection failure and inaccuracy may occur.

Based on the above application scenarios, the first transmission assembly 611 can be controlled to transmit at a constant speed or an actual speed with high precision from the required theoretical speed by using the first motor 641, the first transmission shaft 645, the first transmission wheel 642 and the first transmission belt 643. When the first transmission assembly 611 transmits at a constant speed or an actual speed and the required theoretical speed with high accuracy, the circuit board 2000 also transmits at the constant speed or the actual speed and the required theoretical speed with high accuracy, so that the speed of the circuit board 2000 in the detection process is matched with the speed detected by the optical detection device, the image acquired by the optical detection device is clear, and the detection result is accurate.

In another embodiment, as compared to the previous embodiment, the first transmission shaft 645 may not be provided, and the first transmission wheel 642 and the first transmission belt 643 may be provided only on the side of the first side plate 603 or the second side plate 605 to provide a driving force for moving at one end of the first transmission assembly 611, so that the transmission of the first transmission assembly 611 is realized by the clamp seat of the first transmission assembly 611 sliding along the first side plate 603 and the second side plate 605. In other words, the first motor 641 imparts motive force to the movement of the first transferring assembly 611 at one end of the first transferring assembly 611. The implementation mode has the characteristics of simple structure and low cost.

By providing the first driving wheel 642 and the first driving belt 643 at both sides of the first side plate 603 and the second side plate 605, the loss of the driving efficiency can be minimized, and the problem of the hysteresis of the power transmission only by the clamp seat due to the large span at the left and right sides can be effectively avoided, compared with the case where the first driving wheel 642 and the first driving belt 643 are provided at one side. Especially in the optical detection process, the position of the plate head needs to be kept synchronous at the moment of detection starting, if transmission delay occurs, the problem that two clamps or a plurality of clamps are asynchronous is caused, and further abnormity occurs on a detected image.

Referring to fig. 17, the transmission mechanism 600 further includes a second motor 646 (which is covered by the first side plate 603 in fig. 17, see fig. 23), at least one second belt 647, and at least two second driving wheels 648 for driving the second transmission assembly 633 to move. The transfer mechanism 600 may also include a second drive shaft 649. The position of the second transmission shaft 649 may be similar, and specifically, the second transmission shaft 649 and the first transmission shaft 645 are arranged in the Z-axis direction. The second motor 646 may be located close to the first motor 641, and both are located on a side of the first side plate 603 away from the second side plate 605. Of course, the second motor 646 could also be located on the side of the second side plate 605 that is distal from the first side plate 603. Specifically, the second drive wheel 648 is a timing pulley. The second drive wheel 648 may be a pulley, a steel pulley, or the like. Specifically, the second belt 647 is a timing belt. The second belt 647 may be a belt or a steel belt, etc.

One end of a second transmission shaft 649 penetrates through the first side plate 603 and is electrically connected to the second motor 646, and the other end of the second transmission shaft 649 is rotatably connected to the second side plate 605. The assembly and transmission of the second transmission wheel 648 and the second transmission shaft 649 can refer to the assembly and transmission of the first transmission wheel 642 and the first transmission shaft 645. The assembly and transmission of the second driving wheel 648 and the second driving belt 647 can refer to the assembly and transmission of the first driving wheel 642 and the second driving belt 647.

In this way, the rotation shaft of the second motor 646, the second transmission shaft 649, the second transmission wheel 648 and the second transmission belt 647 are synchronously rotated, so as to realize the movement of the second transmission assembly 633 along the positive direction or direction of the X axis. Because the second transmission component 633 also transmits in the mode of a motor, a transmission shaft, a transmission wheel and a transmission belt, the second transmission component 633 can be controlled to transmit at a constant speed or an actual speed and a required theoretical speed with high precision, and the circuit board 2000 also transmits at the constant speed or the actual speed and the required theoretical speed with high precision, so that the speed of the circuit board 2000 in the detection process is matched with the speed detected by the optical detection equipment, images acquired by the optical detection equipment are clear, and the detection result is accurate.

Further, a position signal such as a grating ruler, a magnetic grating ruler or other encoders may be disposed on the first side plate 603 and/or the second side plate 605 to read the positions of the first conveying assembly 611 and the second conveying assembly 633 in the X direction in real time, and to feed back the position information to the detection mechanism or the controller.

Referring to fig. 17, the first conveying assembly 611 is an upper conveying assembly, and the second conveying assembly 633 is a lower conveying assembly; alternatively, the first conveying assembly 611 is a lower conveying assembly, and the second conveying assembly 633 is an upper conveying assembly. The "upper transfer unit" refers to a transfer unit that is located on the ground surface and is relatively far from the ground surface when the transfer mechanism 600 is located on the ground surface. The "lower conveyance unit" refers to a conveyance unit that is located relatively close to the floor surface when the conveyance mechanism 600 is installed on the floor surface. The first transmission component 611 is taken as an upper transmission component in the embodiment of the present application. The second conveying assembly 633 is illustrated as a lower conveying assembly.

According to the transmission mechanism 600 provided by the embodiment of the application, the first transmission component 611 and the second transmission component 633 are arranged to alternately transmit the circuit board 2000 with the front section pressed by the transmission mechanism 600 to the blanking conveying mechanism under the action of the controller, so that the transmission efficiency of the circuit board 2000 can be effectively improved.

Of course, the number of the first conveying assemblies 611 is not specifically limited in the present application, in other words, the number of the first conveying assemblies 611 may be plural, and the number of the second conveying assemblies 633 is not specifically limited in the present application, in other words, the number of the second conveying assemblies 633 may be plural.

At present, the traditional conveying mechanism for conveying circuit boards generally adopts a mode of combining an upper roller and a lower roller or a mode of combining an upper belt and a lower belt. For a roller-type transport mechanism, the disadvantages include at least the following: 1. authenticity and efficiency of the image: when the circuit board enters the image acquisition area through the transmission of a set of rollers, the head of the circuit board instantly enters the next set of rollers, so that the transmission of the circuit board is suddenly blocked, and the phenomenon of slipping occurs. The image compression is shown on the collected image, which affects the detection result and causes the false judgment and the missing detection of the circuit board detection. When the circuit board just leaves the image acquisition area, the board tail suddenly leaves a group of rollers, the resistance of the circuit board suddenly decreases at the moment, the transmission speed suddenly increases, and the phenomenon of slipping also occurs. The collected image shows image stretching, which affects the detection result and causes circuit board detection misjudgment and missing detection. Therefore, the acquired image is not real, and the detection efficiency is influenced. 2. The roller processing requirements and the cost are as follows: for the roller type transmission, according to the parameters of the detection camera and the detection precision requirement, the calculated requirement of the equipment on the full-run-out tolerance of the roller processing is very high, the standard specification size of an industrial circuit board is 28 inches, the roller processing with the length is very difficult to achieve the processing precision run-out, and the cost is very high (for example, the roller size: the diameter is 45mm, the length is 950mm, the full-run-out tolerance requirement is within 0.01mm, the full-run-out tolerance requirement is very difficult to process and the cost is very high). 3. Service life aspect: after the roller is used for a long time, the roller is affected by stress deformation generated by load and the roller, the full run-out tolerance is gradually increased, the roller is scrapped and needs to be replaced, and the service life is short. 4. Performance stability: when the rollers are conveyed, the upper roller and the lower roller move in a tangent mode, at the moment, the roller group can only press one line and is affected by the material of the circuit board, the unevenness of the board surface and the like, the acquisition area is uneven, the image blurring occurs, the detection result is affected, and the performance is unstable. Moreover, because the environment of a circuit board manufacturing workshop is severe, the roller can convey the circuit board for a long time, so that more dust particles are adhered to the surface of the roller, the surface of the circuit board is polluted, the detection image is misjudged, and the performance stability is poor. 5. Maintenance and debugging difficulties: the roller group that upper and lower cylinder is constituteed, the assembly requirement is very high, and the full run-out tolerance and the depth of parallelism requirement of upper and lower cylinder are within 0.01mm to there is fixed requirement in the clearance of upper and lower cylinder, and the debugging is fairly complicated, has brought very big difficulty for maintenance and debugging.

For belt-type transfer mechanisms, the drawbacks include at least the following: 1. performance stability: influenced by circuit board self material and face unevenness etc. be difficult to guarantee the roughness when the conveying on the belt, add conveyer itself and also be uneven, lead to the regional unevenness of collection, the image appears fuzzy, influences the testing result, the performance is unstable. 2. Service life aspect: the belt material is polyurethane belt or the belt of other materials, and long-time and circuit board friction conveying pass the board, lead to the belt wearing and tearing easily, often need change, life is short. 3. Compatibility: the belt has flexible tensor, leads to upper and lower two sets of belts can't the tensioning contact, receives the influence of circuit board self material, and most circuit boards have the phenomenon of local warpage, and the circuit board that conveys thinly is unable contact transmission, consequently has the limitation, can not satisfy the demand of most customer's commonality product, and the compatibility is low. 4. Maintenance and debugging difficulties: the gap between the upper belt and the lower belt of the equipment acquisition section is small, the debugging of the distance and the parallelism between the two belts is quite complex, and great difficulty is brought to the maintenance and the debugging.

In this embodiment, by disposing the first conveying assembly 611 and the second conveying assembly 633 on the conveying mechanism 600, the first conveying assembly 611 and the second conveying assembly 633 both clamp the circuit board 2000, and then the motor drives the first conveying assembly 611 and the second conveying assembly 633 to move along the Y axis, so that the first conveying assembly 611 drives the circuit board 2000 to gradually get away from the front section of the conveying mechanism 600, and the second conveying assembly 633 drives the circuit board 2000 to gradually get away from the front section of the conveying mechanism 600. Compared with the conventional roller transmission or belt transmission, the conveying mechanism 600 provided by the embodiment of the application is driven by the clamping circuit board 2000 and the motor, and the motor can stably drive the conveying assembly (the conveying assembly comprises the first conveying assembly 611 and the second conveying assembly 633) to move along the Y-axis direction, so that the circuit board 2000 does not slide, and the conveying speed of the conveying assembly can be accurately controlled, for example, the conveying speed of a plate (namely, the circuit board 2000) can be accurately controlled to be conveyed at a constant speed or an actual speed and a required theoretical speed with high accuracy; meanwhile, the head of the circuit board 2000 is clamped by the conveying assembly, and the tail of the circuit board 2000 is pressed by the front section of the conveying mechanism 600, so that the circuit board 2000 can keep stable and stable performance in the moving process, and the service life of the first conveying assembly 611 and the second conveying assembly 633 cannot be influenced.

Referring to fig. 17, in the present embodiment, two opposite ends of the second clamp seat 635 are respectively connected to a pair of first guide rails 607 in a sliding manner. The opposite ends of the second clamp seat 635 are slidably connected to a pair of second guide rails 609 of the frame 601, respectively. The second chuck 635 and the first chuck 613 extend along the Y-axis direction. A pair of first rail 607 and second rail 609 are provided along the Z-axis direction. In other words, the first jig holder 613 and the second jig holder 635 are provided to be offset in the Z-axis direction.

Referring to fig. 17, the first clamp seat 613 is connected to the first belt 643, and the second clamp seat 635 is connected to the second belt 647.

Referring to fig. 17, a first fixture 615 is disposed on the first fixture seat 613, and a second fixture 637 is disposed on the second fixture seat 635. The first gripper 615 is disposed on a side of the first gripper base 613 facing the front section of the transfer mechanism 600. The second jig 637 is also provided on the side of the second jig base 635 facing the front section of the transfer mechanism 600. Both the first fixture 615 and the second fixture 637 are used to clamp the wiring board 2000.

The first fixture 615 and the second fixture 637 may be of the same or different configurations. Optionally, the first clamp 615 is slidable relative to the clamp base in the Z-axis direction to adjust the height of the first clamp 615. Likewise, the second fixture 637 may also slide in the Z-axis direction relative to the fixture seat to adjust the height of the second fixture 637.

Alternatively, the number of the first jigs 615 on the first jig base 613 may be one or more, and when the number of the first jigs 615 is plural, the plural first jigs 615 may be adjusted in height individually, or the plural first jigs 615 may be adjusted in height together. Accordingly, the number of the second jigs 637 may be one or more, and when the number of the second jigs 637 is plural, the plural second jigs 637 may be adjusted in height individually, or the plural second jigs 637 may be adjusted in height together.

The design of the first clamp 615 in this embodiment includes, but is not limited to, the following embodiments. In this embodiment, the first jig 615 is used as an upper jig, and the second jig 637 is used as a lower jig.

Referring to fig. 18 and 19, in one possible embodiment of the first clamp, the first clamp 615 includes a cylinder block 619, a clamping cylinder 621, a floating joint 631, a clamp moving plate 627 and a clamp fixing plate 629.

Referring to fig. 18 and 19, the cylinder block 619 is directly or indirectly connected to the first chuck block 613. The clamping cylinder 621 is provided on the cylinder block 619. The floating joint 631 is connected to the clamp cylinder 621 in the positive Z-axis direction. One end of the floating joint 631 is connected to the clamp cylinder 621, and the other end of the floating joint 631 is connected to a first end of the clamp movable plate 627. The clip moving plate 627 extends substantially in the X-axis direction. Wherein, a clip pressing plate 628 is disposed at a second end of the clip moving plate 627. A clip fixing plate 629 is located on the side of the clip moving plate 627 facing away from the clamping cylinder 621. A first end of the clip securing plate 629 is fixedly attached to the cylinder block 619. The middle section of the clip fixing plate 629 is rotatably connected with the middle section of the clip moving plate 627 by a rotating shaft. The second end of the clamp fixing plate 629 and the second end of the clamp movable plate 627 generate a clamping force against each other under the actions of the clamping cylinder 621 and the floating connector 631 to clamp the circuit board 2000.

The floating joint 631 is also called as a floating coupling, and the floating joint 631 can absorb the eccentricity and the lack of parallelism precision between the clamp moving plate 627 and the clamping cylinder 621 on one hand, so that the clamp moving plate 627 and the clamping cylinder 621 can work within an allowable eccentricity range; on the other hand, the floating joint 631 occupies a small volume and has few parts.

By designing the first clamp 615, the clamping cylinder 621 can push the floating joint 631 along the Z-axis in the reverse direction, so as to move the first end of the clamp moving plate 627 along the Z-axis in the reverse direction, and further drive the second end of the clamp moving plate 627 to move along the Z-axis in the forward direction, at this time, the clamp pressing plate 628 on the second end of the clamp moving plate 627 is separated from the second end of the clamp fixing plate 629 to form an opening, and the first motor 641 drives the first driving belt 643 to move towards the X-axis in the reverse direction, so that the end of the circuit board 2000 press-fitted with the front section of the transmission mechanism 600 is disposed in. The clamp cylinder 621 pulls the floating joint 631 along the Z-axis forward direction to move the first end of the clamp moving plate 627 along the Z-axis forward direction, so as to drive the second end of the clamp moving plate 627 to move along the Z-axis backward direction until the clamp pressing plate 628 on the second end of the clamp moving plate 627 and the second end of the clamp fixing plate 629 clamp the end of the circuit board 2000. The first motor 641 drives the first transmission belt 643 to move forward along the X axis, so that the first transmission assembly 611 drives the circuit board 2000 to move forward along the X axis.

It can be understood that the opening angle of the clamp moving plate 627 relative to the clamp fixing plate 629 can be adjusted by the clamping cylinder 621, so that the first clamp 615 can clamp circuit boards 2000 with different thicknesses; the clamp moving plate 627 has enough clamping force when clamping the circuit board 2000 by the control of the clamping cylinder 621, so as to stably clamp the circuit board 2000.

The front end of the clamp (the second end of the clamp movable plate 627) is provided with a clamp pressing plate 628, so that circuit boards 2000 with different thicknesses can be clamped tightly, and the problem that a thin plate (for example, a plate with a thickness of 0.05 mm) cannot be detected is solved. The clamp pressing plate 628 is provided with a saw-toothed structure, the second end of the clamp fixing plate 629 is also provided with a saw-toothed structure, so that the friction force between the clamp pressing plate 628 and the circuit board 2000 is increased, the friction force between the second end of the clamp fixing plate 629 and the circuit board 2000 is increased, the clamping force of the first clamp 615 is improved by increasing friction factors, and the circuit board 2000 is prevented from sliding down in the clamping process.

Further, referring to fig. 17 and 18, the first clamp 615 further includes a movable cylinder 617. Wherein the movable cylinder 617 is fixed to the first chuck base 613. A movable cylinder 617 may be connected to a cylinder block 619 of the plurality of first clamps 615 by a connection plate to move the plurality of first clamps 615 together in the Z-axis direction. In other words, one movable cylinder 617 is used to adjust the heights of the plurality of first clamps 615.

In other embodiments, a movable cylinder 617 may be coupled to a cylinder block 619 of a first clamp 615 to move the first clamp 615 in the Z-axis direction.

Referring to fig. 18, in an embodiment of a possible layout of the first fixture, the number of the first fixtures 615 arranged on the first fixture seat 613 is plural, and the plural first fixtures 615 include at least one first clamp 615a and at least one second clamp 615 b. Alternatively, the first clip 615a may be fixed or slidable with respect to the first holder 613. Alternatively, the second clip 615b may be fixed or slidable with respect to the first holder 613. In this embodiment, the first clip 615a and the second clip 615b are both fixed relative to the first clamp seat 613. The number of the first clips 615a may be one, and the number of the second clips 615b may be plural. Optionally, a distance between the adjacent first clips 615a and the second clips 615b is smaller than or equal to a distance between two adjacent second clips 615 b. In other words, the plurality of second clips 615b are disposed at a higher density. When the first clip 615a grips the first end of the board (i.e., the circuit board 2000), a different second clip 615 can be adapted to grip the second end of the board (i.e., the circuit board 2000). Thus, the second clips 615b can be used for the first conveying assembly 611 to clamp boards (i.e., circuit boards 2000) with different lengths. Of course, in other embodiments, the number of the first clips 615a may be one, and the number of the second clips 615b may be one. The first clip 615a and the second clip 615b are fixed relative to the first clamp seat 613. The first clip 615a and the second clip 615b are disposed at an interval, and the first clip 615a and the second clip 615b can clamp a plate (i.e., a circuit board 2000) having a length greater than the interval between the two clips. In other embodiments, the number of first clips 615a may be one, and the number of second clips 615b may be one. The first clip 615a is fixed with respect to the first holder 613, and the second clip 615b is slidable along the first holder 613. By adjusting the position of the second clamp 615b, plates (i.e., the circuit board 2000) with different sizes can be clamped. In other embodiments, the number of first clips 615a may be one, and the number of second clips 615b may be one. The first clip 615a and the second clip 615b both slide relative to the first holder 613. By adjusting the positions of the first clip 615a and the second clip 615b, plates (i.e., circuit boards 2000) with different sizes can be clamped.

In this embodiment, referring to fig. 18, a plurality of first clamps 615 are disposed on a cylinder moving plate 630, and the cylinder moving plate 630 is connected to the movable cylinder 617 through a guide rail, so that all the first clamps 615 can complete the ascending and descending operations under the action of the movable cylinder 617.

In the transport mechanism 600, a position signal feedback device such as a grating scale or other encoder is disposed on the first guide rail 607 to feed back the position of the first transport unit 611 in the X direction.

In operation, the first conveying assembly 611 takes out the circuit board 2000 at a constant speed (or non-uniform speed) by the first motor 641, and after the circuit board 2000 is taken out, all the first clamps 615 are opened at the same time to clamp the circuit board 2000. All the first grippers 615 are simultaneously opened again to drop the circuit board 2000 into the blanking conveyor mechanism and then all the first grippers 615 are returned to the original position by the movable air cylinder 617, and the next transfer is repeated. The Z-axis direction position of all the first jigs 615 is controlled by one movable cylinder 617, on the one hand, the number of cylinders in the Z-axis direction can be reduced, and on the other hand, the heights of all the first jigs 615 in the Z-axis direction can be made uniform.

Referring to fig. 20, the structure of the second conveying assembly 633 is substantially the same as that of the first conveying assembly 611, and the second conveying assembly 633 is different from the first conveying assembly 611 in that the first fixture 615 is different from the second fixture 637.

Referring to fig. 19 and 21, in a possible structure of the first and second jigs, the second jig 637 and the first jig 615 have substantially the same structure. The second clamp 637 includes a cylinder block 619, a clamping cylinder 621, a clamp moving plate 627, and a clamp fixing plate 629. Optionally, the second clamp 637 may further include a floating joint 631 and a movable cylinder 617.

The second clamp 637 mainly differs from the first clamp 615 in that the clamping cylinder 621 of the first clamp 615 is located on a side of the clamp moving plate 627 which faces away from the clamp fixing plate 629. The clamping cylinder 621 of the second clamp 637 is located on a side of the clamp fixing plate 629 away from the clamp moving plate 627. In other words, in the Z-axis direction, the clamping cylinder 621 of the first clamp 615, the clamp moving plate 627 of the first clamp 615, and the clamp fixing plate 629 of the first clamp 615 are sequentially disposed. The clip moving plate 627 of the second clip 637, the clip fixing plate 629 of the second clip 637, and the clamping cylinder 621 of the second clip are sequentially disposed.

Specifically, referring to fig. 21, the clamping cylinder 621, the clip fixing plate 629 and the clip moving plate 627 of the second clamp 637 are sequentially arranged along the Z-axis in the forward direction. The principle of the second clamp 637 clamping and releasing the circuit board 2000 can refer to the principle of the first clamp 615 clamping and releasing the circuit board 2000, and is not described in detail here.

In this embodiment, referring to fig. 17, in the Z-axis direction, the first clamp 615 is disposed on a side of the first clamp seat 613 close to the second clamp seat 635. The second fixture 637 is disposed on a side of the second fixture seat 635 close to the first fixture seat 613, so that the first fixture 615 and the second fixture 637 are both close to the circuit board 2000, and thus the distance between the first fixture 615 and the second fixture 637 to be adjusted in the Z-axis direction is small. Of course, in other embodiments, the first clamp 615 is disposed on a side of the first clamp seat 613 away from the second clamp seat 635; and the second clamp 637 is disposed on a side of the second clamp seat 635 close to the first clamp seat 613. Alternatively, the first clamp 615 is disposed on a side of the first clamp seat 613 away from the second clamp seat 635; and the second clamp 637 is disposed on a side of the second clamp seat 635 away from the first clamp seat 613. Alternatively, the first clamp 615 is disposed on a side of the first clamp seat 613 close to the second clamp seat 635; and the second clamp 637 is disposed on a side of the second clamp seat 635 away from the first clamp seat 613.

In the process of transferring the wiring board 2000 by the first transfer member 611, for the position adjustment in the X-axis direction, the first motor 641 transfers the first transfer member 611 to a position close to the wiring board 2000. For the position adjustment in the Y-axis direction, one first clip 615a of the first transport assembly 611 is located at a position close to the first side plate 603, and the other second clip 615b of the first transport assembly 611 slides along the first clip seat 613 to a suitable position according to the dimension of the wiring board 2000 in the Y-axis direction, so that the first clip 615a and the second clip 615b described above can stably clip the side of the wiring board 2000 extending in the Y-axis direction. For the position adjustment in the Z-axis direction, the movable cylinder 617 adjusts the position of the first jig 615 in the Z-axis direction so that the height of the clip fixing plate 629 of the first jig 615 matches the height of the bottom side of the wiring board 2000. For the clip control process, the clamping cylinder 621 acts on the clip moving plate 627 through the floating joint 631 to open the second end of the clip moving plate 627 to a proper angle with respect to the clip fixing plate 629 to enable the first clamp 615 to clamp the circuit board 2000. When the first clamp 615 is unfolded to a proper angle, the first motor 641 drives the first transmission assembly 611 to move further close to the circuit board 2000, so that the edge of the circuit board 2000 enters a certain distance into the opening of the first clamp 615, and the clamping cylinder 621 acts on the clamp moving plate 627 through the floating joint 631, so that the opening of the first clamp 615 is closed, and the circuit board 2000 is clamped. The first motor 641 drives the first transmission assembly 611 to drive the circuit board 2000 to move away from the front section of the transmission mechanism 600 at a precise control speed. When the transferring mechanism 600 is used for optical inspection, the inspecting mechanism inspects defects on the circuit board 2000, and the first motor 641 controls the moving speed of the circuit board 2000 to be matched with the inspecting speed of the inspecting mechanism, so as to improve the quality of the inspected image.

It is understood that the structure and the transferring process of the second transferring assembly 633 can refer to the structure and the transferring process of the first transferring assembly 611, wherein the structure of the second fixture 637 is different from the structure of the first fixture 615, and the above description is referred to, and therefore, the description thereof is omitted. The principle that the second transmission module 633 transmits the circuit board 2000 can refer to the principle that the first transmission module 611 transmits the circuit board 2000, and is not described herein again.

Referring to fig. 21, in an alternative embodiment of a possible arrangement of the first and second clamps, the second clamp 637 includes at least one third clamp 637a and at least one fourth clamp 637 b. The third and fourth clips 637a and 637b may be fixed or slidable with respect to the second jig base 630. For example, the third and fourth clips 637a and 637b are both fixed relative to the second jig base 630. The number of the third clips 637a is one, the number of the fourth clips 637b is plural, and the distance between the adjacent third clips 637a and fourth clips 637b is larger than the distance between the adjacent two fourth clips 637b, so that the third clips 637a and fourth clips 637b can clamp different length sizes of boards (i.e., wiring boards 2000). The first clip 615a and the third clip 637a may be provided in line in the X-axis direction or may be provided offset in the X-axis direction. The second clip 615b and the fourth clip 637b may be arranged in line in the X-axis direction or may be arranged offset in the X-axis direction.

The second jig base 630 of the second convey assembly 633 is mounted to a pair of second rails 609. A position signal feedback device such as a grating ruler or other encoder is arranged on the second guide rail 609 to feed back the position of the second conveying component 633 in the X direction, and the detected circuit board 2000 is conveyed out of the device.

By arranging a plurality of relatively dense clamps along the Y-axis direction, the circuit board 2000 with any size can be compatible, and the compatibility is high. The conveying assembly adopts a modular design, and is convenient to debug and maintain.

In a second possible layout embodiment of the first clamp, referring to fig. 22-24, the first clamp 615 includes at least one first clip 615a and at least one second clip 615 b. The first clip 615a is a fixed clip fixed to the first clip base 613, and the position of the first clip 615a can be fixed to a reference position. The second clip 615b is a movable clip with respect to the first clip seat 613. The second clip 615b is disposed on the belt module on the first clamp seat 613, and can move relative to the first clamp seat 613 under the action of the belt module, and the position of the second clip 615b in the Y direction is changed by the belt module according to the dimension information of the circuit board 2000 in the Y axis direction, so that the first transmission component 611 can be suitable for the transmission of the circuit board 2000 with any dimension. It will be appreciated that the belt module may be replaced by a ball screw or linear motor or the like.

Specifically, the belt module includes a third motor 651, at least one third driving belt 653 and at least two third driving wheels 655. The third motor 651, the third driving belt 653 and the third driving wheel 655 are all disposed on the first chuck base. The third driving belt 653 may be disposed in the Y-axis direction. When the first clip 615a is adjacent to the first side plate 603, the third drive belt 653 may be relatively close to the second side plate 605. The axial directions of the two third transmission wheels 655 may be arranged in the Z-axis direction. Of course, in other embodiments, the axial directions of the two third transmission wheels 655 may be arranged in the X-axis direction by changing the arrangement surfaces of the two third transmission wheels 655. The rotating shaft of the third motor 651 can be directly or indirectly connected to the rotating shaft of one third driving wheel 655, and the third driving belt 653 is sleeved on the two third driving wheels 655. The second clip 615b is provided on the third belt 653. When the third motor 651 drives the rotating shaft of the third driving wheel 655 to rotate, the third driving wheel 655 drives the third driving belt 653 to drive the second clamp 615b to move along the Y-axis direction, so as to adjust the position of the second clamp 615b in the Y-axis direction, and clamp circuit boards 2000 with different Y-axis sizes.

In addition, a plurality of position signals such as a grating scale, a magnetic grating scale or other encoders are further disposed on the first gripper seat 613 to read the position of the second gripper 615b in the X direction in real time, so as to feed back the position information of the second gripper 615b to the controller.

Referring to fig. 25 and fig. 26, the principle of the first transmission assembly 611 for transmitting the circuit board 2000 is as follows: firstly, according to the size information of the circuit board 2000, the position of the second clamp 615b is adjusted through a belt module, when the first conveying assembly 611 moves to a proper position, the first clamp 615a and the second clamp 615b are controlled to be opened simultaneously, the first clamp 615a and the second clamp 615b are lowered to the conveying height in the Z direction through the movable air cylinder 617, then the first conveying assembly 611 is conveyed to the position to be conveyed through the first motor 641, after the first conveying assembly is in place, the first clamp 615a and the second clamp 615b are closed simultaneously, the circuit board 2000 is taken out at a constant speed through the first motor 641, after the first clamp 615a and the second clamp 615b are opened simultaneously to release the circuit board 2000, the circuit board 2000 falls into the blanking conveyor to be conveyed out, then the first clamp 615a and the second clamp 615b return to the initial position through the movable air cylinder 617, and the next conveying is repeated.

In a second possible structural embodiment of the first clamp, referring to fig. 26, the first clamp 615 includes a cylinder block 619, a clamping cylinder 621, a clamp link 623, a clamp bearing 625, a clamp moving plate 627 and a clamp fixing plate 629.

Referring to fig. 18 and 19, the cylinder block 619 is directly or indirectly connected to the first chuck block 613. The clamping cylinder 621 is provided on the cylinder block 619. The clamp bearing 625 and the clamp link 623 are connected to the clamp cylinder 621 in sequence along the positive direction of the Z-axis. One end of the clamp link 623 is connected to the clamp cylinder 621, the other end of the clamp link 623 is connected to one end of the clamp bearing 625, and the other end of the clamp bearing 625 is connected to the first end of the clamp movable plate 627. The clip moving plate 627 extends substantially in the X-axis direction. Wherein, a clip pressing plate 628 is disposed at a second end of the clip moving plate 627. A clip fixing plate 629 is located on the side of the clip moving plate 627 facing away from the clamping cylinder 621. A first end of the clip securing plate 629 is fixedly attached to the cylinder block 619. The middle section of the clip fixing plate 629 is rotatably connected with the middle section of the clip moving plate 627 by a rotating shaft. The second end of the clamp fixing plate 629 and the second end of the clamp movable plate 627 generate a clamping force against each other under the actions of the clamping cylinder 621 and the floating connector 631 to clamp the circuit board 2000.

The clamp adopts the connecting rod structure design, is simple and reliable in structure, free of friction damage, long in service life, and simple and convenient to debug and maintain.

Further, referring to fig. 27, the first clamp 615 further includes a movable cylinder 617. Wherein the movable cylinder 617 is fixed to the first chuck base 613. A movable cylinder 617 may be coupled to a cylinder block 619 of a first clamp 615 to move the first clamp 615 in the Z-axis direction.

In a possible configuration of the second fixture, referring to fig. 28 and 29, the second fixture 637 is substantially the same as the first fixture 615. The second clamp 637 includes a cylinder block 619, a clamping cylinder 621, a clamp moving plate 627, and a clamp fixing plate 629. Optionally, the second clamp 637 may further include a clamp link 623 and a clamp bearing 625.

The second clamp 637 mainly differs from the first clamp 615 in that the clamping cylinder 621 of the first clamp 615 is located on a side of the clamp moving plate 627 which faces away from the clamp fixing plate 629. The clamping cylinder 621 of the second clamp 637 is located on a side of the clamp fixing plate 629 away from the clamp moving plate 627.

Referring to fig. 28 and 29, in a possible layout of the second fixture, the second fixture 637 includes a third clamp 637a fixed relative to the second fixture seat 635 and a fourth clamp 637b movable relative to the second fixture seat 635. The driving structure of the fourth clip 637b moving along the second clip seat 635 refers to the driving structure of the second clip 615b moving along the first clip seat 613, and is not described in detail herein. The second clamp 637 is substantially identical in construction to the first clamp 615. The second clamp 637 mainly differs from the first clamp 615 in that the clamping cylinder 621 of the first clamp 615 is located on a side of the clamp moving plate 627 which faces away from the clamp fixing plate 629. The clamping cylinder 621 of the second clamp 637 is located on a side of the clamp fixing plate 629 away from the clamp moving plate 627. In other words, in the Z-axis direction, the clamping cylinder 621 of the first clamp 615, the clamp moving plate 627 of the first clamp 615, and the clamp fixing plate 629 of the first clamp 615 are sequentially disposed. The clip moving plate 627 of the second clip 637, the clip fixing plate 629 of the second clip 637, and the clamping cylinder 621 of the second clip are sequentially disposed.

It should be understood that, referring to fig. 27 and fig. 28, the structure of the second conveying assembly 633 may refer to the structure of the first conveying assembly 611, wherein the structure of the first clamp 615 is different from the structure of the second clamp 637, and the above description is referred to, and is not repeated herein. The principle that the second transmission module 633 transmits the circuit board 2000 can refer to the principle that the first transmission module 611 transmits the circuit board 2000, and is not described herein again. The first transmission assembly 611 and the second transmission assembly 633 in the present embodiment can also realize alternate transmission line boards 2000 to increase the transmission efficiency of the line boards 2000.

The specific action flow is as follows: after the circuit board 2000 is conveyed to the conveying waiting position, the fourth clamp 637b of the second conveying assembly 633 adjusts the clamp position according to the size of the circuit board 2000, the second clamp 615b and the first clamp 615a of the first conveying assembly 611 are opened, the movable air cylinder 617 of the second conveying assembly 633 is lifted, the second conveying assembly 633 moves to the waiting position through the second guide rail 609, the clamp of the second conveying assembly 633 is closed to clamp the circuit board 2000, then the circuit board 2000 is taken out at a constant speed through the second guide rail 609 until all the circuit board 2000 passes through the collecting position, similarly, the first conveying assembly 611 completes conveying according to the same procedure, the first conveying assembly 611 and the second conveying assembly 633 alternately perform conveying, the efficiency is improved, the conveyed circuit board 2000 directly falls onto the blanking conveying mechanism below, and the circuit board 2000 is conveyed out through the blanking conveying mechanism.

This application is for traditional circuit board 2000's automated optical inspection's transfer mode, solve the unreal problem of the collection image that traditional cylinder conveying and belt drive brought effectively, in order to adopt the transport mechanism 600 that has anchor clamps and adopt first transport assembly 611 and the transmission of second transport assembly 633 alternative, the X axle direction configuration grating chi of transport assembly or other encoder wait position signal feedback device simultaneously, guarantee the stationarity and the production efficiency of circuit board 2000 conveying, the transport mode that adopts anchor clamps can prevent effectively that circuit board 2000 from skidding in the data send process, thereby the authenticity of collection image when transport mechanism 600 has been used for optical inspection equipment has been guaranteed.

In the sixth aspect, the present application exemplifies the structure of the blanking conveying mechanism 900, but of course, the present application includes, but is not limited to, the blanking conveying mechanism 900 provided in the following embodiments.

Referring to fig. 1 and 30, the feeding mechanism 900 is connected to the discharging end of the conveying mechanism 600. The blanking conveying mechanism 900 is arranged on the frame 601. The blanking conveying mechanism 900 is located between the first conveying assembly 611 and the second conveying assembly 633. The blanking conveying mechanism 900 includes a blanking conveying motor 901, a blanking driving shaft 903, a plurality of belts 905, a plurality of tensioning idle wheels 907, and a plurality of driven wheels 911. A feed drive shaft 903, a driven pulley 911 and at least one tension idler pulley 907 are used to tension the belt 905. A plurality of belts 905 share a feeding drive shaft 903, with each belt 905 corresponding to a driven pulley 911 and at least one idler tensioning pulley 907.

Referring to fig. 30, a plurality of belts 905 extend in the Y-axis direction. The plurality of belts 905 form a second space therebetween. The second jig 637 penetrates the second space to convey the circuit board 2000 on the upper side of the blanking conveyor mechanism 900. The blanking conveying motor 901 is connected with a blanking driving shaft 903 and used for driving the blanking driving shaft 903 to drive a plurality of belts 905 to move synchronously.

Referring to fig. 1, 17 and 30, the second jigs 637 of the transfer mechanism 600 are spaced apart from each other. The gaps between the plurality of second clamps 637 may be equal or different. The number of the belts 905 is plural, and each belt 905 is provided between adjacent two second jigs 637. The width of the belt 905 in the Y-axis direction is adapted to the interval between two adjacent second jigs 637. The spacing between the third clip 637c and the fourth clip 637d is relatively large in the Y-axis forward direction. At this time, the belt 905 disposed between the third and fourth clips 637c and 637d may be a wide flat belt, and accordingly, the tension idler 907 is a wide tension idler, and the driven pulley 911 is a wide driven pulley. The interval between the adjacent two fourth clips 637d is relatively small. At this time, the belt 905 disposed between the adjacent two fourth clips 637d may be a narrow flat belt, and accordingly, the tension idler 907 is a narrow tension idler, and the driven pulley 911 is a narrow driven pulley.

The power of the blanking conveying motor 901 is transmitted to a blanking driving shaft 903 through a synchronous belt, a wide flat belt and a plurality of groups of narrow flat belts are mounted on the blanking driving shaft 903, the belts 905 are arranged at intervals, the intervals between the belts 905 are used for exposing the second clamp 637 so as to clamp and move the circuit board 2000, a wide driven wheel and a plurality of groups of narrow driven wheels are arranged at the other end of the belt 905, and a tensioning idler wheel 907 is arranged below each belt 905 and comprises a wide tensioning idler wheel and a plurality of groups of narrow tensioning idler wheels. After the second clamp 637 is conveyed to take out the circuit board 2000, the second clamp 637 can be directly opened, and the circuit board 2000 is conveyed out by the blanking conveying mechanism 900 after the second clamp 637 ascends or descends in the Z direction to avoid the height, so that the conveying is simple and convenient.

After the circuit board 2000 completes the board finishing action under the action of the board finishing mechanism 100, the circuit board enters the connecting wheel mechanism 300, the thickness measuring sensor measures the thickness of the circuit board 2000, then the circuit board 2000 is conveyed to the board taking and material waiting position, at this time, the detection adjusting device 805 adjusts the height of the first detection mechanism 801 according to the data obtained by thickness measurement, the conveying mechanism 600 starts to convey from the material waiting position and passes through the detection area, and the first detection mechanism 801 and the second detection mechanism 831 complete image acquisition under the support of the upper and lower light source mechanisms. The first conveying component 611 and the second conveying component 633 in the conveying mechanism 600 alternately convey, so that the production efficiency is improved, and the collected circuit board 2000 is sent out of the equipment from the blanking conveying mechanism 900, so that the rectification and modification detection process is completed.

While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the application, and it is intended that such changes and modifications be covered by the scope of the application.

Claims (10)

1. An optical inspection apparatus for inspecting circuit boards, comprising:

the board arranging mechanism is used for arranging the circuit boards to be aligned along a first direction;

the pressing wheel mechanism is connected with the discharge end of the board arranging mechanism and is used for flattening the circuit board;

the conveying mechanism is connected with the discharge end of the pressing wheel mechanism and is used for conveying the circuit board at a preset speed; and

the detection mechanism is arranged on the pressing wheel mechanism and used for detecting the board surface of the circuit board in the process of conveying the circuit board by the conveying mechanism.

2. The optical inspection apparatus of claim 1, wherein the plate-aligning mechanism includes a table, a transfer table, an adjusting mechanism assembly, a first driving assembly and a plurality of second driving assemblies, the adjusting mechanism assembly is disposed on the table, the transfer table is disposed on the table and covers the adjusting mechanism assembly, the adjusting mechanism assembly includes a plurality of adjusting mechanism sets, each adjusting mechanism set includes a plurality of adjusting mechanisms, the adjusting mechanism includes a driving wheel, a first driving assembly, a second driving assembly, a third driving assembly and a fourth driving assembly, the first driving assembly drives all the driving wheels to roll on the transfer table through the third driving assembly, the second driving assembly and the first driving assembly, so as to realize the transmission of the circuit board; the second driving assembly drives the angle of the driving wheel of each row to deflect through the fourth transmission assembly and the first transmission assembly.

3. The optical detection device according to claim 2, wherein the first transmission assembly comprises a first spur gear, a second spur gear and a first bevel gear, the first spur gear is coaxially connected with the transmission wheel, the rotation axis of the transmission wheel is parallel to the transmission platform, the rotation axis of the second spur gear is parallel to the rotation axis of the first spur gear, the second spur gear is positioned on one side of the first spur gear, which is far away from the transmission platform, and is engaged with the first spur gear, and the first bevel gear is coaxially connected with the second spur gear;

the second transmission assembly comprises a second bevel gear and a third bevel gear which are coaxially connected, the second bevel gear is arranged on one side of the transmission wheel, which is far away from the transmission platform, the axial direction of the second bevel gear is perpendicular to the transmission platform, and the second bevel gear is meshed with the first bevel gear; the third bevel gear is positioned on one side of the second bevel gear, which is far away from the driving wheel;

the third transmission assembly comprises a driving shaft and a fourth bevel gear arranged on the periphery of the driving shaft, the axial direction of the driving shaft is perpendicular to the axial direction of the second transmission assembly, and the fourth bevel gear is meshed with the third bevel gear;

the fourth transmission assembly comprises a third straight gear, a rack and a connecting rod, the third straight gear is positioned on one side of the third transmission assembly, which is far away from the second transmission assembly, and the axial direction of the third straight gear is collinear with the axial direction of the second transmission assembly; the rack is connected with the third straight gear in a meshed manner; one end of the connecting rod is fixedly connected with the supporting seat of the driving wheel, and the other end of the connecting rod crosses over the second transmission assembly and is fixedly connected with the rotating shaft of the third straight gear.

4. The optical inspection apparatus of claim 1, wherein the pinch roller mechanism includes a pinch roller assembly and a support roller assembly, the pinch roller assembly and the support roller assembly are disposed opposite to each other and spaced apart from each other, and a first space is formed between the pinch roller assembly and the support roller assembly for conveying the circuit board; the pinch roller subassembly includes first pinch roller group and second pinch roller group, first pinch roller group for second pinch roller group is close to transport mechanism, the supporting wheel subassembly includes first supporting wheelset and second supporting wheelset, first pinch roller group with first supporting wheelset sets up relatively on the direction of delivery of circuit board, second pinch roller group is located first supporting wheelset with the second supports between the wheelset.

5. The optical detection device according to claim 4, wherein the first pinch roller set includes a first elastic buffer and a first pinch roller connected to the first elastic buffer, the first pinch roller is used for pressing the circuit board, and the first elastic buffer is located on a side of the first pinch roller away from the circuit board; the second pinch roller group includes second elastic buffer and connects the second pinch roller of second elastic buffer, the second pinch roller is used for the pressfitting the circuit board, second elastic buffer is located the second pinch roller deviates from one side of circuit board.

6. The optical inspection apparatus of claim 4, wherein the inspection mechanism includes a first inspection mechanism and a second inspection mechanism, the first inspection mechanism is disposed on a side of the pinch roller assembly facing away from the circuit board, the second inspection mechanism is disposed on a side of the support wheel assembly facing away from the circuit board, and the first inspection mechanism inspects the defect on the first side of the circuit board by capturing images when the circuit board is conveyed by the conveyor mechanism; the second detection mechanism detects the defects of the second surface of the circuit board in the form of collected images.

7. The optical inspection apparatus of claim 6, wherein the first inspection mechanism further comprises an inspection mounting base, an inspection adjustment device, at least one camera base, a camera adjustment device, at least one camera lens, a thickness measurement sensor, a coaxial light source, and a side light source, wherein the inspection mounting base is disposed on the press wheel mechanism, the inspection adjustment device is disposed on the inspection mounting base, the camera base is disposed on the inspection adjustment device, the camera adjustment device is disposed on the camera base, and the camera lens is disposed on the camera adjustment device; the thickness measuring sensor is arranged on the detection mounting seat and is used for detecting the thickness of the circuit board, so that the detection adjusting device can adjust the distance between the acquisition camera and the circuit board according to the thickness of the circuit board; the camera adjusting device is used for adjusting the axial direction of the camera lens, the coaxial light source and the side light source are arranged on the detection mounting seat, and the coaxial light source and the side light source are used for supplementing light when the acquisition camera acquires images.

8. The optical inspection apparatus of claim 1, wherein the conveyor mechanism includes a frame, a first conveyor assembly disposed on the frame for holding the circuit board, a second conveyor assembly disposed on the frame, the second conveyor assembly being staggered from the first conveyor assembly, the first conveyor assembly and the second conveyor assembly both being slidably coupled to the frame, the second conveyor assembly being configured to hold the circuit board, and a controller configured to control the first conveyor assembly and the second conveyor assembly to alternately convey the circuit board.

9. The optical inspection apparatus of claim 8, wherein the first transport assembly includes a first gripper seat and at least one first gripper disposed on the first gripper seat, and the second transport assembly includes a second gripper seat and at least one second gripper disposed on the second gripper seat, opposite ends of the first gripper seat and the second gripper seat slidably engaging opposite sides of the frame; the second clamp seat and the first clamp seat are arranged in a staggered mode in a second direction, and the second direction is perpendicular to the first direction;

the first clamp is arranged on one side, close to the second clamp seat, of the first clamp seat; the second clamp is arranged on one side, close to the first clamp seat, of the second clamp seat.

10. The optical inspection apparatus of claim 9, further comprising a blanking conveyor mechanism, wherein the blanking conveyor mechanism is connected to a discharge end of the conveyor mechanism, the blanking conveyor mechanism is disposed on the frame, and the blanking conveyor mechanism is disposed between the first conveyor assembly and the second conveyor assembly; the blanking conveying mechanism comprises a blanking conveying motor, a blanking driving shaft, a plurality of belts, a plurality of tensioning idler wheels and a plurality of driven wheels, wherein the blanking driving shaft, the driven wheels and at least one tensioning idler wheel are used for tensioning the belts, the belts extend in the first direction and are arranged in multiple ways, a second interval is formed between the belts, a second clamp penetrates through the second interval to convey the circuit board, the blanking conveying motor is connected with the blanking driving shaft and used for driving the blanking driving shaft to drive the belts to move synchronously.

Images