CN211720853U

CN211720853U - PCB placing machine

Info

Publication number: CN211720853U
Application number: CN202020771949.2U
Authority: CN
Inventors: 曾琦; 唐锋; 蔡跃祥; 李振果; 林坤才
Original assignee: Fujian Hongtai Intelligent Industrial Internet Co ltd
Current assignee: Fujian Hongtai Intelligent Industrial Internet Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2020-10-20
Anticipated expiration: 2030-05-11

Abstract

The utility model discloses a PCB placing machine, which comprises a machine body bracket, a first transmission mechanism, a second transmission mechanism, a mobile manipulator, a visual positioning mechanism and a control mechanism; the first conveying mechanism is used for conveying the small PCB; the second conveying mechanism is used for conveying the large PCB; the moving manipulator reciprocates to the first conveying mechanism and the second conveying mechanism and is used for moving and placing the small PCB on the large PCB; the visual positioning mechanism is positioned above the first conveying mechanism and the second conveying mechanism and used for positioning the small PCB, the large PCB and the position of the placing station; the utility model discloses under control mechanism's control, when carrying little PCB board and big PCB board by first transport mechanism and second transport mechanism, vision positioning mechanism provides positioning information, removes the manipulator and accomplishes that remove little PCB board, place on big PCB board to replace the manual work to place with the help of the instrument, it places the precision height, efficient.

Description

PCB placing machine

Technical Field

The utility model relates to a surface mounting technology (short for SMT), especially relate to a PCB board placer.

Background

In the SMT workshop, often need place little PCB board on big PCB board, because silk screen printing tin cream above the PCB board of two laminatings, lead to unable artifical direct handheld placing, so, the staff need just can place little PCB board on big PCB board with the help of the instrument, but, this mode has also brought the defect of placing the precision low and inefficiency.

In view of this, the present designer is able to make a deep conception on the defects and inconveniences caused by the imperfect PCB placement process, and actively research, improve, try and develop the present invention.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a place machine is placed to precision height, efficient PCB board.

In order to achieve the above purpose, the solution of the present invention is:

a PCB board placer is used for placing a small PCB board on a large PCB board and comprises a machine body bracket, a first conveying mechanism, a second conveying mechanism, a moving manipulator, a visual positioning mechanism and a control mechanism; the first conveying mechanism, the second conveying mechanism, the moving manipulator, the visual positioning mechanism and the control mechanism are all arranged on the machine body bracket; the first conveying mechanism is used for conveying the small PCB; the second conveying mechanism is used for conveying the large PCB; the moving manipulator is back and forth to the first conveying mechanism and the second conveying mechanism and is used for moving and placing the small PCB on the large PCB; the visual positioning mechanism is positioned above the first conveying mechanism and the second conveying mechanism and used for positioning the small PCB, the large PCB and the position of the placing station; the control mechanism is electrically connected with the first conveying mechanism, the second conveying mechanism, the movable manipulator and the visual positioning mechanism respectively and used for controlling the first conveying mechanism, the second conveying mechanism, the movable manipulator and the visual positioning mechanism.

The first conveying mechanism comprises a first conveying support, a first conveying roller, a first conveying supporting plate, a first conveying belt, a first driving roller and a first driving motor; the first transmission bracket and the first driving motor are both arranged on the machine body bracket; the first conveying roller and the first conveying supporting plate are matched on the first conveying support; the first driving roller is matched on an output shaft of a first driving motor; the first conveyor belt surrounds the first conveying supporting plate and is in transmission connection with the first conveying roller and the first driving roller; the second conveying mechanism comprises a second conveying bracket, a second conveying roller, a second conveying supporting plate, a second conveying belt, a transmission connecting rod, a second driving roller and a second driving motor; the second conveying bracket and the second driving motor are both arranged on the machine body bracket; the second conveying roller and the second conveying supporting plate are matched on the second conveying bracket; the transmission connecting rod is in rotating fit with the second transmission bracket, and one end of the transmission connecting rod is in transmission connection with the second driving motor; the second driving roller is matched on the transmission connecting rod; the second conveying belt is wound on the second conveying supporting plate and is in transmission connection with the second conveying roller and the second driving roller.

The first transmission mechanism further comprises a first width adjusting assembly, and the first width adjusting assembly comprises a first width adjusting seat, a width adjusting sliding rod and a linear bearing; the first conveying bracket comprises a first left bracket and a first right bracket; the first width adjusting seat is fixed on the machine body bracket; the width adjusting sliding rod is matched on the first width adjusting seat; the first left bracket is movably matched on the width-adjusting sliding rod through a linear bearing; the first right bracket is fixed at one end of the first width adjusting seat; the second transmission mechanism further comprises a second width adjusting assembly, and the second width adjusting assembly comprises a second width adjusting seat, a width adjusting screw rod, a screw rod sleeve and a third driving motor; the second conveying support comprises a second left support and a second right support; the second width adjusting seat is fixed on the machine body bracket; the third driving motor is arranged on the second width adjusting seat; the width adjusting screw rod is rotationally matched on the second width adjusting seat and is in transmission connection with a third driving motor; the second left bracket is movably matched on the width-adjusting screw rod through a screw rod sleeve; and the second right bracket is fixed at one end of the second width-adjusting seat.

The first conveying mechanism further comprises a first photoelectric sensor and a second photoelectric sensor; the first photoelectric sensor is matched with the input end of the first transmission mechanism; the second photoelectric sensor is matched in the middle of the first conveying mechanism; the second transport mechanism further comprises a third photosensor, a fourth photosensor and a fifth photosensor; the third photoelectric sensor is matched at the input end of the second transmission mechanism; the fourth photoelectric sensor is matched in the middle of the second conveying mechanism; and the fifth photoelectric sensor is matched at the output end of the second transmission mechanism.

The movable manipulator comprises a first rotating machine, a connecting cross arm, a second rotating machine, a lifter, a third rotating machine, a sucker seat and a sucker; the first rotating machine is fixed on the machine body bracket; one end of the connecting cross arm is connected to a rotating shaft of the first rotating machine, and the other end of the connecting cross arm is connected to a rotating shaft of the second rotating machine; the lifter is provided with one end of the second rotating machine; the third rotating machine is arranged on a lifting shaft of the lifter; the sucker seat is matched on a rotating shaft of the third rotating machine; the sucking disc is installed in the bottom of sucking disc seat.

The sucker seat comprises a fixed seat body, a movable connecting rod, a mounting plate and a pressure sensor; the fixed base is matched on the third rotating machine; one end of the movable connecting rod is movably matched on the fixed seat body, and the other end of the movable connecting rod is connected to the mounting plate; the sucker is arranged at the bottom of the mounting plate; the pressure sensor is arranged at the bottom of the fixed base body and is in movable contact with the mounting plate.

The sucker seat further comprises a laser sensor, the laser sensor is installed on the fixed seat body, and four laser light sources are arranged towards the second conveying mechanism.

The visual positioning mechanism comprises a first camera and a second camera; the first camera and the second camera are both installed on the machine body support and are respectively located above the first conveying mechanism and the second conveying mechanism.

The visual positioning mechanism further comprises a first light source, a second light source and a baffle plate; the first light source is matched with the first camera to supplement light for the first camera to take images; the second light source is matched with the second camera and used for supplementing light for the second camera; the enclosure baffle is arranged on the machine body bracket and encloses to form a moving space.

The visual positioning mechanism further comprises a third camera, a third light source, a fourth camera and a fourth light source; the third camera and the third light source are both arranged on the machine body bracket and face the moving manipulator for image taking and light supplementing; and the fourth camera and the fourth light source are both arranged on the sucker seat and face the second conveying mechanism for image taking and light supplementing.

After the scheme is adopted, the utility model discloses a be equipped with first transport mechanism, second transport mechanism, mobile manipulator, vision positioning mechanism and control mechanism, under control mechanism's control, when carrying little PCB board and big PCB board by first transport mechanism and second transport mechanism, vision positioning mechanism provides positioning information, and mobile manipulator accomplishes and removes little PCB board, places on big PCB board to replace the manual work to place with the help of the instrument, it places the precision height, efficient.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of the enclosure plate according to the preferred embodiment of the present invention after being removed;

FIG. 3 is a schematic structural view of a first conveying mechanism according to a preferred embodiment of the present invention;

FIG. 4 is a schematic structural view of a second conveying mechanism according to a preferred embodiment of the present invention;

fig. 5 is a schematic structural diagram of a mobile robot according to a preferred embodiment of the present invention.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1 to 5, in order to implement the preferred embodiment of the PCB board placement machine of the present invention, the placement machine is used for placing a small PCB board 1 on a large PCB board 2, and the placement machine includes a machine body support 3, a first transmission mechanism 4, a second transmission mechanism 5, a moving manipulator 6, a visual positioning mechanism 7 and a control mechanism 8; the first conveying mechanism 4, the second conveying mechanism 5, the moving manipulator 6, the visual positioning mechanism 7 and the control mechanism 8 are all arranged on the machine body bracket 3; the first conveying mechanism 4 is used for conveying the small PCB 1; the second conveying mechanism 5 is used for conveying the large PCB 2; the moving manipulator 6 is reciprocated to the first conveying mechanism 4 and the second conveying mechanism 5 and used for moving and placing the small PCB 1 on the large PCB 2; the visual positioning mechanism 7 is positioned above the first conveying mechanism 4 and the second conveying mechanism 5 and is used for positioning the small PCB 1, the large PCB 2 and the positions of the placing stations; the control mechanism 8 is electrically connected to the first transfer mechanism 4, the second transfer mechanism 5, the mobile manipulator 6 and the visual positioning mechanism 7, respectively, and is configured to control the first transfer mechanism 4, the second transfer mechanism 5, the mobile manipulator 6 and the visual positioning mechanism 7.

During the use, under the control of control mechanism 8, wait to place big PCB board 2 of little PCB board 1 and carry by second transport mechanism 5, vision positioning mechanism 7 detects that the little PCB board 1 is not placed to the station of placing on big PCB board 2, and second transport mechanism 5 stops carrying to prepare to place little PCB board 1 on big PCB board 2. In addition, the small PCB 1 is conveyed by the first conveying mechanism 4, and the conveying is stopped discontinuously in the conveying process so as to match the moving manipulator 6 to take the small PCB 1 on the first conveying mechanism 4. In the taking process, the visual positioning mechanism 7 can position the small PCB 1 so as to allow the movable manipulator 6 to accurately take the small PCB 1. The movable manipulator 6 moves the taken small PCB 1 to the position above the large PCB 2, and places the small PCB 1 on the placing station of the large PCB 2 according to the placing station on the large PCB 2 positioned by the visual positioning mechanism 7.

The utility model discloses a focus on, the utility model discloses a be equipped with first transport mechanism 4, second transport mechanism 5, remove manipulator 6, vision positioning mechanism 7 and control mechanism 8, under control mechanism 8's control, by first transport mechanism 4 and second transport mechanism 5 when carrying little PCB board 1 and big PCB board 2, vision positioning mechanism 7 provides positioning information, remove manipulator 6 and accomplish and remove little PCB board 1, place on big PCB board 2 to replace the manual work and place with the help of the instrument, it places the precision height, high efficiency.

The first conveying mechanism 4 comprises a first conveying bracket 41, a first conveying roller 42, a first conveying supporting plate 43, a first conveying belt 44, a first driving roller 45 and a first driving motor 46; the first conveying bracket 41 and the first driving motor 46 are both mounted on the body bracket 3; the first transfer roller 42 and the first transfer pallet 43 are fitted on the first transfer bracket 41; the first drive roller 45 is fitted on the output shaft of the first drive motor 46; the first belt 44 is looped around the first conveying blade 43 and is drivingly connected to the first conveying roller 42 and the first drive roller 45. During the use, under the effect of first driving motor 46, drive first conveyer belt 44 through first drive roller 45 and rotate on first drive roller 45, first conveyer roller 42 and first conveying layer board 43 to the cooperation is carried and is placed little PCB board 1 on first conveyer belt 44, and wherein first conveying layer board 43 provides the support for little PCB board 1.

The first transmission mechanism 4 further includes a first width-adjusting assembly 47, the first width-adjusting assembly 47 includes a first width-adjusting seat 471, a width-adjusting slide rod 472 and a linear bearing 473; the first transferring bracket 41 includes a first left bracket 411 and a first right bracket 412; the first width-adjusting seat 471 is fixed on the body support 3; the width-adjusting sliding rod 472 is fitted on the first width-adjusting seat 471; the first left bracket 411 is movably fitted on the width-adjusting slide bar 472 through a linear bearing 473; the first right bracket 412 is fixed to one end of the first widening seat 471. In use, the first left bracket 411 can move on the width-adjusting slide bar 472 through the linear bearing 473 to adjust the position of the first left bracket 411, and then adjust the distance between the first left bracket 411 and the first right bracket 412 to adapt the first conveying mechanism 4 to convey small PCB boards 1 with different widths.

The first transport mechanism 4 further includes a first photosensor 48 and a second photosensor 49; a first photoelectric sensor 48 is fitted at the input end of the first transport mechanism 4; the second photosensor 49 is fitted in the middle of the first conveyance mechanism 4. When the small PCB conveying device is used, the input end of the first conveying mechanism 4 can be identified to flow into the small PCB 1 through the first photoelectric sensor 48, at the moment, the first conveying mechanism 4 is started to convey the small PCB 1 forwards, and when the second photoelectric sensor 49 identifies that the small PCB 1 is conveyed to the middle part of the first conveying mechanism 4, the conveying is stopped, so that the moving manipulator 6 can take the small PCB 1; when the second photoelectric sensor 49 recognizes that the small PCB 1 is taken away by the moving robot 6, the first transfer mechanism 4 is activated to transfer the next small PCB 1 forward.

The second transmission mechanism 5 comprises a second transmission bracket 50, a second transmission roller 51, a second transmission pallet 52, a second transmission belt 53, a transmission connecting rod 54, a second driving roller 55 and a second driving motor 56; the second conveying bracket 50 and the second driving motor 56 are both mounted on the body bracket 3; the second transfer roller 51 and the second transfer pallet 52 are fitted on the second transfer bracket 50; the transmission connecting rod 54 is rotatably matched on the second transmission bracket 50, and one end of the transmission connecting rod is in transmission connection with a second driving motor 56; the second driving roller 55 is fitted on the transmission link 54; the second belt conveyor 53 is looped around the second transfer pallet 52 and is drivingly connected to the second transfer roller 51 and the second drive roller 55. When in use, the transmission connecting rod is driven to rotate under the action of the second driving motor 56; the transmission link 54 drives the second conveyor belt 53 to rotate on the second drive roller 55, the second conveyor roller 51 and the second conveyor pallet 52 through the second drive roller 55 so as to cooperate to convey the large PCB 2 placed on the second conveyor belt 53, wherein the second conveyor pallet 52 provides support for the large PCB 2.

The second transmission mechanism 5 further includes a second width adjusting assembly 57, and the second width adjusting assembly 57 includes a second width adjusting seat 571, a width adjusting screw 572, a screw sleeve 573 and a third driving motor 574; the second transfer carriage 50 includes a second left carriage 501 and a second right carriage 502; the second widening seat 571 is fixed on the machine body bracket 3; the third driving motor 574 is installed on the second widening seat 571; the width-adjusting screw rod 572 is rotatably fitted on the second width-adjusting seat 571 and is in transmission connection with the third driving motor 574; the second left bracket 501 is movably matched on the width-adjusting screw rod 572 through a screw rod sleeve 573; the second right bracket 502 is fixed to one end of the second widening seat 571. When the PCB conveying device is used, the third driving motor 574 drives the transmission screw rod to rotate, the transmission screw rod links the screw rod sleeve 573 to move on the transmission screw rod in the rotating process, the second left support 501 matched with the screw rod sleeve 573 is moved, the position of the second left support 501 is adjusted, the distance between the second left support 501 and the second right support 502 is adjusted, and the second conveying mechanism 5 is matched to convey large PCBs 2 with different widths.

The second transport mechanism 5 further includes a third photosensor 58, a fourth photosensor 59, and a fifth photosensor 510; the third photoelectric sensor 58 is fitted at the input end of the second transfer mechanism 5; the fourth photosensor 59 is fitted in the middle of the second conveyance mechanism 5; a fifth photosensor 510 is fitted to the output end of the second conveyance mechanism 5. When the automatic conveying device is used, the third photoelectric sensor 58 can identify that the input end of the second conveying mechanism 5 flows into the large PCB 2, at the moment, the second conveying mechanism 5 is started to convey the large PCB 2 forwards, and when the second photoelectric sensor identifies that the large PCB 2 is conveyed to the middle of the second conveying mechanism 5, the conveying is stopped, so that the moving manipulator 6 can place the small PCB 1 on the large PCB 2; after the placement is completed, the second transport mechanism 5 continues to transport the large PCB 2 forward, and when the fifth photoelectric sensor 510 recognizes that the large PCB 2 is transported out of the second transport mechanism 5, the second transmission mechanism is started to transport the next large PCB 2 forward.

The transfer robot 6 includes a first rotary machine 61, a connection arm 62, a second rotary machine 63, a lifter 64, a third rotary machine 65, a chuck holder 66, and a chuck 67; the first rotating machine 61 is fixed on the machine body bracket 3; one end of the connecting cross arm 62 is connected to the rotating shaft of the first rotating machine 61, and the other end is connected to the rotating shaft of the second rotating machine 63; the lifter 64 mounts one end of the second rotator 63; the third rotating machine 65 is installed on the elevating shaft of the elevator 64; the suction cup holder 66 is fitted on the rotation shaft of the third rotating machine 65; a suction cup 67 is mounted on the bottom of the suction cup holder 66. In use, the first rotating machine 61 rotates the connecting cross arm 62 through the rotating shaft, and the second rotating machine 63 rotates on the connecting cross arm 62 through the rotating shaft, so that the lifter 64 can move between the first conveying mechanism 4 and the second conveying mechanism 5 in the horizontal direction; the lifter 64 lowers or raises the sucker seat 66 through the lifting shaft to suck and move the small PCB 1 in cooperation with the sucker 67; the third rotating machine 65 drives the suction cup seat 66 to rotate through the rotating shaft so as to adjust the angle of the small PCB 1 and ensure the accurate placement of the small PCB 1.

The suction cup seat 66 comprises a fixed seat body 661, a movable connecting rod 662, a mounting plate 663 and a pressure sensor 664; the fixed base 661 is fitted on the third rotating machine 65; one end of the movable connecting rod 662 is movably matched on the fixed seat body 661, and the other end is connected to the mounting plate 663; the sucker 67 is arranged at the bottom of the mounting plate 663; the pressure sensor 664 is arranged at the bottom of the fixed base body 661 and is movably contacted with the mounting plate 663. When placing little PCB board 1 on big PCB board 2, along with lift 64 descends sucking disc seat 66, little PCB board 1 supports earlier and leans on big PCB board 2, later through sucking disc 67 reverse promotion mounting panel 663, make mounting panel 663 move towards fixed pedestal 661 along movable connecting rod 662, mounting panel 663 still can press on pressure sensor 664, control mechanism 8 judges according to the pressure value that pressure sensor 664 fed back that has compressed tightly little PCB board 1, place on big PCB board 2, and control lift 64 upwards moves sucking disc seat 66, in order to prevent lift 64 excessive decline sucking disc seat 66, and lead to placing of little PCB board 1 not conforming to the standard, damage even.

The suction cup holder 66 further includes a laser sensor 665, and the laser sensor 665 is installed on the fixed holder body 661, and is provided with four laser light sources provided toward the second transfer mechanism 5. After placing little PCB board 1 on big PCB board 2, laser sensor 665 detects the high distance between four laser light source and the four end angles of little PCB board 1 through four laser light source for judge whether the roughness after little PCB board 1 places is in the standard value scope, if in the standard value scope, then will accomplish big PCB board 2 of placing and carry to next process through second transport mechanism 5.

The visual positioning mechanism 7 includes a first camera 70 and a second camera 71; the first camera 70 and the second camera 71 are both mounted on the body frame 3 and are located above the first conveying mechanism 4 and the second conveying mechanism 5, respectively. When the mobile manipulator is used, the small PCB (printed circuit board) 1 on the first conveying mechanism 4 can be positioned through the first camera 70 so that the mobile manipulator 6 can be accurately taken; and then the second camera 71 positions the large PCB 2 on the second conveying mechanism 5 and the placing station thereon, so that the moving manipulator 6 can accurately move and place the small PCB 1 on the placing station of the large PCB 2.

The visual positioning mechanism 7 further includes a first light source 72, a second light source 73, and a baffle 74; the first light source 72 is matched with the first camera 70 for supplementing light for the first camera 70; the second light source 73 is matched on the second camera 71 to supplement light for the second camera 71; the enclosure plates 74 are mounted on the body frame 3 and enclose a transfer space 75. Therefore, the images of the first camera 70 and the second camera 71 have independent supplementary lighting light sources, and are not affected by external light, so that the images of the first camera 70 and the second camera 71 are more stable and accurate.

The visual positioning mechanism 7 further includes a third camera 76, a third light source 77, a fourth camera 78 and a fourth light source 79; the third camera 76 and the third light source 77 are both mounted on the body support 3, and capture and supplement light toward the moving manipulator 6; the fourth camera 78 and the fourth light source 79 are both mounted on the suction cup holder 66, and capture and supplement light toward the second conveying mechanism 5. When the small PCB 1 passes through the third camera 76, the third camera 76 positions the small PCB 1 so as to match the moving manipulator 6 to adjust the angle of the small PCB 1 and determine the state of the small PCB 1 before installation; when the small PCB 1 is placed on the large PCB 2, the fourth camera 78 positions the placing station on the large PCB 2 to determine the position and angle of the placing station, so as to cooperate with the mobile manipulator 6 to place the small PCB 1 on the placing station; the positioning of the small PCB 1 and the placing station by the third camera 76 and the fourth camera 78 improves the placing accuracy of the small PCB 1.

The foregoing description of the specific exemplary embodiments of the invention has been presented for the purposes of illustration and description and is not intended to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application, to thereby enable others skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as may be suited to the particular use contemplated and contemplated by those skilled in the art without departing from the scope of the invention.

Claims

1. The utility model provides a PCB board placer which characterized in that: the placing machine is used for placing a small PCB on a large PCB and comprises a machine body support, a first conveying mechanism, a second conveying mechanism, a moving manipulator, a visual positioning mechanism and a control mechanism; the first conveying mechanism, the second conveying mechanism, the moving manipulator, the visual positioning mechanism and the control mechanism are all arranged on the machine body bracket; the first conveying mechanism is used for conveying the small PCB; the second conveying mechanism is used for conveying the large PCB; the moving manipulator is back and forth to the first conveying mechanism and the second conveying mechanism and is used for moving and placing the small PCB on the large PCB; the visual positioning mechanism is positioned above the first conveying mechanism and the second conveying mechanism and used for positioning the small PCB, the large PCB and the position of the placing station; the control mechanism is electrically connected with the first conveying mechanism, the second conveying mechanism, the movable manipulator and the visual positioning mechanism respectively and used for controlling the first conveying mechanism, the second conveying mechanism, the movable manipulator and the visual positioning mechanism.

2. The PCB board placement machine of claim 1, wherein: the first conveying mechanism comprises a first conveying support, a first conveying roller, a first conveying supporting plate, a first conveying belt, a first driving roller and a first driving motor; the first transmission bracket and the first driving motor are both arranged on the machine body bracket; the first conveying roller and the first conveying supporting plate are matched on the first conveying support; the first driving roller is matched on an output shaft of a first driving motor; the first conveyor belt surrounds the first conveying supporting plate and is in transmission connection with the first conveying roller and the first driving roller;

the second conveying mechanism comprises a second conveying bracket, a second conveying roller, a second conveying supporting plate, a second conveying belt, a transmission connecting rod, a second driving roller and a second driving motor; the second conveying bracket and the second driving motor are both arranged on the machine body bracket; the second conveying roller and the second conveying supporting plate are matched on the second conveying bracket; the transmission connecting rod is in rotating fit with the second transmission bracket, and one end of the transmission connecting rod is in transmission connection with the second driving motor; the second driving roller is matched on the transmission connecting rod; the second conveying belt is wound on the second conveying supporting plate and is in transmission connection with the second conveying roller and the second driving roller.

3. A PCB board placement machine according to claim 2, wherein: the first transmission mechanism further comprises a first width adjusting assembly, and the first width adjusting assembly comprises a first width adjusting seat, a width adjusting sliding rod and a linear bearing; the first conveying bracket comprises a first left bracket and a first right bracket; the first width adjusting seat is fixed on the machine body bracket; the width adjusting sliding rod is matched on the first width adjusting seat; the first left bracket is movably matched on the width-adjusting sliding rod through a linear bearing; the first right bracket is fixed at one end of the first width adjusting seat;

the second transmission mechanism further comprises a second width adjusting assembly, and the second width adjusting assembly comprises a second width adjusting seat, a width adjusting screw rod, a screw rod sleeve and a third driving motor; the second conveying support comprises a second left support and a second right support; the second width adjusting seat is fixed on the machine body bracket; the third driving motor is arranged on the second width adjusting seat; the width adjusting screw rod is rotationally matched on the second width adjusting seat and is in transmission connection with a third driving motor; the second left bracket is movably matched on the width-adjusting screw rod through a screw rod sleeve; and the second right bracket is fixed at one end of the second width-adjusting seat.

4. A PCB board placement machine according to claim 2, wherein: the first conveying mechanism further comprises a first photoelectric sensor and a second photoelectric sensor; the first photoelectric sensor is matched with the input end of the first transmission mechanism; the second photoelectric sensor is matched in the middle of the first conveying mechanism;

the second transport mechanism further comprises a third photosensor, a fourth photosensor and a fifth photosensor; the third photoelectric sensor is matched at the input end of the second transmission mechanism; the fourth photoelectric sensor is matched in the middle of the second conveying mechanism; and the fifth photoelectric sensor is matched at the output end of the second transmission mechanism.

5. The PCB board placement machine of claim 1, wherein: the movable manipulator comprises a first rotating machine, a connecting cross arm, a second rotating machine, a lifter, a third rotating machine, a sucker seat and a sucker; the first rotating machine is fixed on the machine body bracket; one end of the connecting cross arm is connected to a rotating shaft of the first rotating machine, and the other end of the connecting cross arm is connected to a rotating shaft of the second rotating machine; the lifter is provided with one end of the second rotating machine; the third rotating machine is arranged on a lifting shaft of the lifter; the sucker seat is matched on a rotating shaft of the third rotating machine; the sucking disc is installed in the bottom of sucking disc seat.

6. The PCB board placement machine of claim 5, wherein: the sucker seat comprises a fixed seat body, a movable connecting rod, a mounting plate and a pressure sensor; the fixed base is matched on the third rotating machine; one end of the movable connecting rod is movably matched on the fixed seat body, and the other end of the movable connecting rod is connected to the mounting plate; the sucker is arranged at the bottom of the mounting plate; the pressure sensor is arranged at the bottom of the fixed base body and is in movable contact with the mounting plate.

7. The PCB board placement machine of claim 6, wherein: the sucker seat further comprises a laser sensor, the laser sensor is installed on the fixed seat body, and four laser light sources are arranged towards the second conveying mechanism.

8. The PCB board placement machine of claim 1, wherein: the visual positioning mechanism comprises a first camera and a second camera; the first camera and the second camera are both installed on the machine body support and are respectively located above the first conveying mechanism and the second conveying mechanism.

9. The PCB board placement machine of claim 8, wherein: the visual positioning mechanism further comprises a first light source, a second light source and a baffle plate; the first light source is matched with the first camera to supplement light for the first camera to take images; the second light source is matched with the second camera and used for supplementing light for the second camera; the enclosure baffle is arranged on the machine body bracket and encloses to form a moving space.

10. The PCB board placement machine of claim 8, wherein: the visual positioning mechanism further comprises a third camera, a third light source, a fourth camera and a fourth light source; the third camera and the third light source are both arranged on the machine body bracket and face the moving manipulator for image taking and light supplementing; and the fourth camera and the fourth light source are both arranged on the sucker seat and face the second conveying mechanism for image taking and light supplementing.