CN116940105A

CN116940105A - SMT chip mounter

Info

Publication number: CN116940105A
Application number: CN202311113376.9A
Authority: CN
Inventors: 谈世尧; 李军; 李锦红; 黄加林; 刘世良
Original assignee: Guangdong Kegu Power Co ltd; Guangdong Kegu Zhixiang Electric Appliance Co ltd; Guangdong Yungu Power Supply Co ltd; Jiangsu Kegu Electronic Co ltd; Guangdong Kegu Intelligent Technology Co ltd
Current assignee: Guangdong Kegu Power Co ltd; Guangdong Kegu Zhixiang Electric Appliance Co ltd; Guangdong Yungu Power Supply Co ltd; Jiangsu Kegu Electronic Co ltd; Guangdong Kegu Intelligent Technology Co ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2023-10-24

Abstract

The invention relates to the technical field of electronic mounting, in particular to an SMT chip mounter, which comprises a feeding mechanism, a PCB conveying mechanism, a chip sucking mechanism and a translation mechanism, wherein the translation mechanism comprises a rack, an X-axis moving assembly and a Y-axis moving assembly which are sequentially connected, the mounting position on the PCB is photographed and identified through a second camera assembly, then the chip sucking mechanism is driven to horizontally move to the position above the feeding mechanism to take materials through the translation mechanism, the materials pass through the position above the first camera assembly during return stroke after taking materials, the moving stroke of a suction nozzle is shortened, the production efficiency is improved, the chip sucking mechanism and the LED chip adsorbed by the chip sucking mechanism are photographed and identified through the first camera assembly, feedback adjustment is carried out according to the photographing and identifying result, the offset error of the LED chip is automatically corrected, and the processing precision and the yield are improved.

Description

SMT chip mounter

Technical Field

The invention relates to the technical field of electronic mounting, in particular to an SMT chip mounter.

Background

The SMD is quickly and accurately attached to the PCB through the functions of sucking, displacement, positioning, placement and the like, so that the SMD can be used for realizing the assembly of a large number of LED circuit boards. When the existing chip mounter is used for carrying out chip mounting on an LED, the position of the PCB corresponding to the chip mounting is coated with adhesive and soldering paste, during the chip mounting, the PCB moves to a mounting station along with a transmission device, then, a plurality of suction nozzles on the chip mounter firstly move to the LED chip mounting position and run with vacuum equipment connected with the suction nozzles, negative pressure is generated at the suction nozzles to adsorb the LED chip mounting, then, the suction nozzles move to the upper part of the PCB, and at the moment, the vacuum air nozzles are closed, and meanwhile, the air blowing program runs to place the LED chip mounting at the corresponding position on the PCB.

In the process, due to the fact that the LED patches on the feeding mechanism possibly have position deviation, the suction nozzle generates deviation on the adsorption position of the LED patches, and then the suction nozzle generates deviation when the LED patches are placed on the PCB, so that the accuracy and the yield of the patches are reduced, the existing technology for performing deviation recognition by adopting a camera is adopted at present, but the installation position of the camera is fixed, the suction nozzle needs to be moved to the position above the camera for shooting after taking materials, the moving stroke of the suction nozzle is prolonged, the processing efficiency is reduced, and the probability of generating position deviation is further increased by prolonging the moving stroke of the suction nozzle.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the SMT chip mounter which can automatically correct the offset error of the LED chip, and has the advantages of high processing precision, high yield and high production efficiency.

The technical scheme adopted by the invention is as follows:

the utility model provides a SMT chip mounter, including feed mechanism, PCB board conveying mechanism, inhale piece mechanism and drive inhale piece mechanism and carry out horizontal migration's translation mechanism, translation mechanism is including the frame that connects gradually, X axle remove the subassembly and Y axle remove the subassembly, one side that X axle remove the subassembly and be close to feed mechanism is connected with first camera subassembly, inhale piece mechanism and Y axle remove the subassembly and be connected, and it can move respectively to directly over feed mechanism and first camera subassembly, PCB board conveying mechanism sets up in inhale piece mechanism's below, inhale piece mechanism's bottom and be connected with second camera subassembly.

Preferably, a lifting mechanism for driving the suction sheet mechanism to lift is connected between the Y-axis moving assembly and the suction sheet mechanism, the lifting mechanism comprises a first mounting frame and a first motor, the first motor is fixed at the top of the first mounting frame, the output end of the bottom of the first motor is connected with a first screw, the first screw is connected with a first nut block through threads, one side of the first mounting frame is connected with a first sliding rail, a first sliding block is connected on the first sliding rail in a sliding manner, and the first sliding block and the first nut block are fixedly connected with the suction sheet mechanism.

Preferably, the X-axis moving assembly comprises a transverse frame, an L-shaped frame and two second motors, wherein the L-shaped frame is symmetrically connected to two sides of the transverse frame, one opposite sides of the two L-shaped frames are respectively connected with a second sliding block and a second nut block, two sides of the frame are respectively connected with a second sliding rail, the second sliding blocks are slidably connected onto the second sliding rails, the second motors are fixed onto the frame, the output ends of the second motors are connected with second screws, and the second screws are connected with the second nut blocks through threads.

Preferably, the L-shaped frame comprises a vertical plate and a transverse plate connected to one side of the bottom of the vertical plate, wherein a suction piece in-out avoidance vacancy is arranged above the transverse plate, and one side of the transverse plate, which is close to the feeding mechanism, is connected with the first camera assembly.

Preferably, the Y-axis moving assembly comprises a sliding frame and a third motor, the third motor is fixed on the X-axis moving assembly, the output end of the third motor is connected with a third screw rod, one side of the X-axis moving assembly is connected with a third sliding rail, one side of the sliding frame is connected with a third sliding block and a third nut block, the third sliding block is connected onto the third sliding rail in a sliding mode, and the third screw rod is connected with the third nut block through threads.

Preferably, the suction sheet mechanism comprises a second mounting frame, a suction nozzle, a lifting block, a lifting driving belt and a fourth motor for driving the lifting driving belt to perform rotary motion, the second camera assembly is connected to the bottom of the second mounting frame, one side of the second mounting frame is connected with a third mounting frame, a suction pipe is connected to the third mounting frame in a sliding manner, the bottom of the suction pipe is connected with the suction nozzle, the middle of the suction pipe is fixedly connected with the lifting block, and the lifting block is connected with the lifting driving belt and fixed on the third mounting frame.

Preferably, the lifting block is connected with the bracing piece, and the top of bracing piece is connected with the crane, and crane sliding connection is in one side of third mounting bracket, and its top fixedly connected with fifth motor, and the bottom output of fifth motor is connected with the action wheel, and the outside of action wheel is connected with rotatory drive belt, and the one end that rotatory drive belt kept away from the action wheel is connected with from the driving wheel, from driving wheel and straw connection.

Preferably, a third camera assembly is provided above the feeding mechanism.

Preferably, the PCB conveying mechanism comprises a conveying belt and limiting plates, wherein the limiting plates are symmetrically arranged on two sides of the conveying belt respectively.

Preferably, the feeding mechanism, the PCB conveying mechanism and the suction sheet mechanism are all provided with a plurality of conveying mechanisms.

The invention has the beneficial effects that:

this SMT chip mounter shoots discernment through second camera subassembly to the mounting position on the PCB board, then inhales piece mechanism horizontal migration through translation mechanism drive and get the material to feed mechanism top, gets the material back through the top of first camera subassembly when the return stroke, has shortened the travel of suction nozzle, improves production efficiency, and shoots discernment to inhaling piece mechanism and absorptive LED paster through first camera subassembly to carry out feedback regulation according to shooting discernment result, realize carrying out automatic correction to the offset error of LED paster, improve machining precision and yields.

Drawings

Fig. 1 is a first perspective view of the present invention.

Fig. 2 is a second perspective view of the present invention.

Fig. 3 is a schematic structural view of the lifting mechanism.

FIG. 4 is a schematic diagram of the connection of the X-axis moving assembly.

FIG. 5 is a schematic diagram of the connection of the Y-axis moving assembly.

Fig. 6 is a schematic structural view of the suction sheet mechanism.

Fig. 7 is a schematic view of a part of the structure of the suction sheet mechanism.

Fig. 8 is an exploded view of fig. 7.

In the figure: 1. a feeding mechanism; 2, a PCB conveying mechanism; 21. a conveyor belt; 22. a limiting plate; 3. a suction sheet mechanism; 31. a second mounting frame; 32. a suction nozzle; 33. a lifting block; 34. lifting the transmission belt; 35. a third mounting frame; 36. a suction pipe; 37. a support rod; 38. a lifting frame; 39. rotating the transmission belt; 4. a translation mechanism; 41. a frame; an x-axis movement assembly; 421. a cross frame; l-shaped rack; 4221. a riser; 4222. a cross plate; 4223. the suction sheet enters and exits from the avoidance gap; 423. a second motor; 424. a second slider; 425. a second nut block; 426. a second slide rail; 427. a second screw; y-axis moving assembly; 431. a carriage; 432. a third motor; 433. a third screw; 434. a third slide rail; 435. a third slider; 436. a third nut block; 5. a first camera assembly; 6. a second camera assembly; 7. a lifting mechanism; 71. a first mounting frame; 72. a first motor; 73. a first screw; 74. a first nut block; 75. a first slide rail; 76. a first slider; 8. a third camera assembly; and 9. A PCB board.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-2, the present invention provides a technical solution: the SMT chip mounter comprises a feeding mechanism 1, a PCB conveying mechanism 2, a suction sheet mechanism 3 and a translation mechanism 4 for driving the suction sheet mechanism 3 to horizontally move, wherein the translation mechanism 4 comprises a frame 41, an X-axis moving assembly 42 and a Y-axis moving assembly 43 which are sequentially connected, one side of the X-axis moving assembly 42, which is close to the feeding mechanism 1, is connected with a first camera assembly 5, the suction sheet mechanism 3 is connected with the Y-axis moving assembly 43 and can respectively move to the position right above the feeding mechanism 1 and the position right above the first camera assembly 5, the PCB conveying mechanism 2 is arranged below the suction sheet mechanism 3, and the bottom of the suction sheet mechanism 3 is connected with a second camera assembly 6;

the PCB conveying mechanism 2 conveys the PCB 9 to the lower part of the second camera assembly 6, the mounting position on the PCB 9 is shot and identified through the second camera assembly 6, then the suction sheet mechanism 3 is driven by the translation mechanism 4 to horizontally move to the upper part of the feeding mechanism 1 to take materials, the moving stroke of the suction nozzle 32 is shortened when the materials are taken back to pass through the upper part of the first camera assembly 5, the production efficiency is improved, the suction sheet mechanism 3 and the adsorbed LED patches thereof are shot and identified through the first camera assembly 5, feedback adjustment is carried out according to the shooting identification result, the offset error of the LED patches is automatically corrected, and the processing precision and the yield are improved.

Referring to fig. 3, in order to facilitate adjusting the height of the suction sheet mechanism 3, in this embodiment, preferably, a lifting mechanism 7 for driving the suction sheet mechanism 3 to lift is connected between the Y-axis moving assembly 43 and the suction sheet mechanism 3, the lifting mechanism 7 includes a first mounting frame 71 and a first motor 72, the first motor 72 is fixed at the top of the first mounting frame 71, and the bottom output end thereof is connected with a first screw 73, the first screw 73 is connected with a first nut block 74 through a threaded connection, one side of the first mounting frame 71 is connected with a first slide rail 75, the first slide rail 75 is connected with a first slide block 76 in a sliding manner, the first slide block 76 and the first nut block 74 are fixedly connected with the suction sheet mechanism 3, so that the first screw 73 is driven to rotate by the first motor 72, and then the suction sheet mechanism 3 is driven to lift by the first nut block 74, and meanwhile, the first slide block 76 slides along the first slide rail 75, so that the suction sheet mechanism 3 can lift to different heights, and the feeding stability can be reduced to PCB board conveying mechanisms 2 with different heights, and the feeding applicability can be improved.

Referring to fig. 4, in order to conveniently drive the suction sheet mechanism 3 to move in the X-axis direction, in this embodiment, preferably, the X-axis moving assembly 42 includes a transverse frame 421, an L-shaped frame 422 and two second motors 423, the L-shaped frame 422 is symmetrically connected to two sides of the transverse frame 421, two opposite sides of the L-shaped frame 422 are connected with a second slide block 424 and a second nut block 425, two sides of the frame 41 are connected with a second slide rail 426, the second slide block 424 is slidably connected to the second slide rail 426, the second motor 423 is fixed on the frame 41, and an output end of the second motor 423 is connected with a second screw 427, and the second screw 427 is in threaded connection with the second nut block 425, so that the second motor 423 drives the second nut block 425 to drive the L-shaped frame 422 and the transverse frame 421 to move in the X-axis direction, and further drive the Y-axis moving assembly 43 and the suction sheet mechanism 3 to move in the X-axis direction, and the second slide block 424 slides along the second slide rail 426, thereby improving the moving stability.

For facilitating the X-axis synchronous movement of the first camera assembly 5, in this embodiment, preferably, the L-shaped frame 422 includes a riser 4221 and a transverse plate 4222 connected to one side of the bottom of the riser 4221, a suction piece in-out avoidance space 4223 is disposed above the transverse plate 4222, and one side of the transverse plate, which is close to the feeding mechanism 1, is connected to the first camera assembly 5, so that the suction piece mechanism 3 can move in-out from the suction piece in-out avoidance space 4223, and the suction piece mechanism 3 can pass above the first camera assembly 5 during the return after taking materials, thereby shortening the movement stroke of the suction nozzle 32 and improving the production efficiency.

Referring to fig. 5, in order to conveniently drive the suction sheet mechanism 3 to move in the Y-axis direction, in this embodiment, preferably, the Y-axis moving assembly 43 includes a carriage 431 and a third motor 432, the third motor 432 is fixed on the X-axis moving assembly 42, the output end of the third motor 432 is connected with a third screw 433, one side of the X-axis moving assembly 42 is connected with a third sliding rail 434, one side of the carriage 431 is connected with a third slider 435 and a third nut block 436, the third slider 435 is slidably connected to the third sliding rail 434, the third screw 433 and the third nut block 436 are in threaded connection, so that the third motor 432 drives the third screw 433 to rotate, the third nut block 436 drives the carriage 431 to move in the Y-axis direction, and the carriage 431 drives the suction sheet mechanism 3 to move in the Y-axis direction, and the third slider 435 slides along the third sliding rail 434, thereby improving the moving stability.

Referring to fig. 6-8, in order to facilitate the suction of the sheet, in this embodiment, preferably, the suction sheet mechanism 3 includes a second mounting frame 31, a suction nozzle 32, a lifting block 33, a lifting driving belt 34, and a fourth motor for driving the lifting driving belt 34 to perform a rotation motion, the second camera assembly 6 is connected to the bottom of the second mounting frame 31, one side of the second mounting frame 31 is connected with a third mounting frame 35, a suction pipe 36 is slidably connected to the third mounting frame 35, the bottom of the suction pipe 36 is connected to the suction nozzle 32, and the middle of the suction pipe is fixedly connected to the lifting block 33, the lifting block 33 is connected to the lifting driving belt 34, the fourth motor is fixed to the third mounting frame 35, so that the top of the suction pipe 36 is connected with a vacuum generating device, the suction nozzle 32 is first moved to the upper side of the feeding mechanism 1, the lifting driving belt 34 is driven to perform a rotation by the fourth motor, and then the lifting block 33 is driven to descend, and then the vacuum generating negative pressure at the suction nozzle 32 to generate the negative pressure to adsorb the LED patch on the feeding mechanism 1.

In order to conveniently adjust the mounting angle of the LED patch and conveniently automatically correct the offset error of the LED patch, in the embodiment, preferably, the lifting block 33 is connected with the supporting rod 37, the top of the supporting rod 37 is connected with the lifting frame 38, the lifting frame 38 is slidably connected to one side of the third mounting frame 35, the top of the lifting frame is fixedly connected with the fifth motor, the bottom output end of the fifth motor is connected with the driving wheel, the outer side of the driving wheel is connected with the rotary driving belt 39, one end, far away from the driving wheel, of the rotary driving belt 39 is connected with the driven wheel, the driven wheel is connected with the suction pipe 36, the purpose is to drive the driving wheel to rotate through the fifth motor, and then drive the driven wheel to rotate through the rotary driving belt 39, so that the driven wheel drives the suction pipe 36 to rotate by a certain angle, and then adjust the mounting angle of the LED patch, and the automatic correction of the offset error of the LED patch is convenient.

In order to control the material taking stroke of the sheet sucking mechanism 3 according to the position of the LED patch on the feeding mechanism 1 conveniently, in this embodiment, preferably, a third camera assembly 8 is arranged above the feeding mechanism 1, so that the position of the LED patch on the feeding mechanism 1 is identified by shooting through the third camera assembly 8, so that the sheet sucking mechanism 3 moves to the upper side of the corresponding position according to the position of the LED patch, and the material taking precision is improved.

For the convenience to improve the conveying precision of the PCB 9, prevent that the PCB 9 from shifting, in this embodiment, preferably, the PCB conveying mechanism 2 includes a conveying belt 21 and limiting plates 22, and the limiting plates 22 are symmetrically arranged with two and are respectively arranged at two sides of the conveying belt 21, so that the PCB 9 is conveyed by the conveying belt 21, and two limiting plates 22 are respectively abutted with two sides of the PCB 9, so that the PCB 9 is prevented from shifting.

For the convenience improves machining efficiency, in this embodiment, preferably, feed mechanism 1, PCB board conveying mechanism 2 and inhale piece mechanism 3 all are provided with a plurality of, the purpose is through being equipped with feed mechanism 1 and inhale piece mechanism 3 a plurality of, can realize getting material and paste the dress to a plurality of different types of LED paster in the stroke, improves machining efficiency, through being equipped with a plurality of with PCB board conveying mechanism 2, every PCB board conveying mechanism 2 can set up to carry to not unidimensional PCB board 9, and then can carry out the paster to not unidimensional PCB board 9 respectively, improves the suitability.

The working principle and the using flow of the invention are as follows: the PCB conveying mechanism 2 conveys the PCB 9 to the lower part of the second camera assembly 6, the mounting position on the PCB 9 is photographed and identified through the second camera assembly 6, and the suction sheet mechanism 3 is controlled to suck the LED patches of the corresponding quantity and type according to the photographing and identifying result;

the position image of the LED patch on the feeding mechanism 1 is shot and identified through the third camera component 8, and the position information of the three-dimensional surface point group of the LED patch is acquired, so that the suction sheet mechanism 3 is controlled to move to the position above the corresponding position according to the initial position and the gesture feedback of the LED patch, and the material taking precision is improved;

according to the second camera assembly 6 and the shooting data of the second camera assembly 6, the driving translation mechanism 4 is controlled to rotate, specifically, the second motor 423 drives the second screw 427 to rotate, so that the second nut block 425 drives the L-shaped frame 422 and the transverse frame 421 to move in the X-axis direction, the Y-axis moving assembly 43 and the suction sheet mechanism 3 are driven to move in the X-axis direction, the third motor 432 drives the third screw 433 to rotate, the third nut block 436 drives the sliding frame 431 to move in the Y-axis direction, the sliding frame 431 drives the suction sheet mechanism 3 to move in the Y-axis direction, and the suction nozzle 32 is driven to move above the feeding mechanism 1;

then the lifting transmission belt 34 is driven to rotate through the fourth motor, so that the lifting block 33 is driven to descend, negative pressure is generated by the vacuum generating equipment, and the negative pressure generated by the suction nozzle 32 is used for adsorbing the LED patches on the feeding mechanism 1;

after adsorption, the suction sheet mechanism 3 carries out return movement, the moving process passes through the upper part of the first camera component 5, the moving stroke of the suction nozzle 32 is shortened, the production efficiency is improved, the suction nozzle 32 and the LED patches adsorbed by the suction nozzle 32 are shot and identified through the first camera component 5, feedback adjustment is carried out according to the shooting identification result, the compensation of angles and positions is carried out according to the positions and postures of the adsorbed LED patches, the driving wheel is driven to rotate through a fifth motor, the driven wheel is driven to rotate through a rotary driving belt 39, the driven wheel drives the suction pipe 36 to rotate by a certain angle, the offset error of the LED patches is corrected through the horizontal position compensation of the suction sheet mechanism 3 driven by the translation mechanism 4, automatic correction of the offset error of the LED patches is realized, the processing precision and the yield are improved, and finally the LED patches are placed on the corresponding positions on the PCB 9 according to the mounting tracks.

Finally, it should be noted that: the foregoing is merely a preferred example of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a SMT chip mounter, includes feed mechanism (1), PCB board conveying mechanism (2), inhales piece mechanism (3) and drive and inhale piece mechanism (3) and carry out horizontal migration's translation mechanism (4), its characterized in that: the translation mechanism (4) comprises a frame (41), an X-axis moving assembly (42) and a Y-axis moving assembly (43) which are sequentially connected, one side, close to the feeding mechanism (1), of the X-axis moving assembly (42) is connected with a first camera assembly (5), the suction sheet mechanism (3) is connected with the Y-axis moving assembly (43), the suction sheet mechanism can respectively and movably move to the position right above the feeding mechanism (1) and the position right above the first camera assembly (5), the PCB conveying mechanism (2) is arranged below the suction sheet mechanism (3), and the bottom of the suction sheet mechanism (3) is connected with a second camera assembly (6).

2. An SMT pick and place machine as claimed in claim 1, wherein: the Y-axis moving assembly (43) and the suction sheet mechanism (3) are connected with a lifting mechanism (7) for driving the suction sheet mechanism (3) to lift, the lifting mechanism (7) comprises a first mounting frame (71) and a first motor (72), the first motor (72) is fixed at the top of the first mounting frame (71), the bottom output end of the first motor is connected with a first screw (73), the first screw (73) is connected with a first nut block (74) through threads, one side of the first mounting frame (71) is connected with a first sliding rail (75), a first sliding block (76) is connected to the first sliding rail (75) in a sliding mode, and the first sliding block (76) and the first nut block (74) are fixedly connected with the suction sheet mechanism (3).

3. An SMT pick and place machine as claimed in claim 1, wherein: x axle removes subassembly (42) including crossbearer (421), L shape frame (422) and two second motors (423), L shape frame (422) symmetrical connection is in the both sides of crossbearer (421), two L shape frame (422) opposite direction one side all is connected with second slider (424) and second nut piece (425), the both sides of frame (41) all are connected with second slide rail (426), second slider (424) sliding connection is on second slide rail (426), second motor (423) are fixed in on frame (41), and its output is connected with second screw rod (427), second screw rod (427) pass through threaded connection with second nut piece (425).

4. An SMT pick and place machine according to claim 3, wherein: the L-shaped frame (422) comprises a vertical plate (4221) and a transverse plate (4222) connected to one side of the bottom of the vertical plate (4221), a suction piece in-out avoidance gap (4223) is arranged above the transverse plate (4222), and one side of the suction piece, which is close to the feeding mechanism (1), is connected with the first camera assembly (5).

5. An SMT pick and place machine as claimed in claim 1, wherein: the Y-axis moving assembly (43) comprises a sliding frame (431) and a third motor (432), the third motor (432) is fixed on the X-axis moving assembly (42), the output end of the third motor is connected with a third screw rod (433), one side of the X-axis moving assembly (42) is connected with a third sliding rail (434), one side of the sliding frame (431) is connected with a third sliding block (435) and a third nut block (436), the third sliding block (435) is connected onto the third sliding rail (434) in a sliding mode, and the third screw rod (433) is connected with the third nut block (436) through threads.

6. An SMT pick and place machine as claimed in claim 1, wherein: the suction sheet mechanism (3) comprises a second mounting frame (31), a suction nozzle (32), a lifting block (33), a lifting drive belt (34) and a fourth motor for driving the lifting drive belt (34) to perform rotary motion, the second camera assembly (6) is connected to the bottom of the second mounting frame (31), one side of the second mounting frame (31) is connected with a third mounting frame (35), a suction pipe (36) is connected to the third mounting frame (35) in a sliding manner, the bottom of the suction pipe (36) is connected with the suction nozzle (32), the middle of the suction pipe is fixedly connected with the lifting block (33), the lifting block (33) is connected with the lifting drive belt (34), and the fourth motor is fixed on the third mounting frame (35).

7. An SMT pick and place machine as claimed in claim 6, wherein: the lifting block (33) is connected with a supporting rod (37), the top of the supporting rod (37) is connected with a lifting frame (38), the lifting frame (38) is slidably connected to one side of the third mounting frame (35), the top of the lifting frame is fixedly connected with a fifth motor, the bottom output end of the fifth motor is connected with a driving wheel, the outer side of the driving wheel is connected with a rotary driving belt (39), one end, far away from the driving wheel, of the rotary driving belt (39) is connected with a driven wheel, and the driven wheel is connected with a suction pipe (36).

8. An SMT pick and place machine as claimed in claim 1, wherein: a third camera component (8) is arranged above the feeding mechanism (1).

9. An SMT pick and place machine as claimed in claim 1, wherein: the PCB conveying mechanism (2) comprises a conveying belt (21) and limiting plates (22), wherein the limiting plates (22) are symmetrically arranged on two sides of the conveying belt (21) respectively.

10. An SMT pick and place machine as claimed in claim 1, wherein: the feeding mechanism (1), the PCB conveying mechanism (2) and the suction sheet mechanism (3) are all provided with a plurality of feeding mechanisms.