SMT patch conveying device

Abstract

The invention belongs to the technical field of SMT, and particularly relates to an SMT conveying device. A conveying belt is installed in the grounding frame, a barrier strip is arranged at the upper end of the conveying belt, a touch sensor is installed on the surface of the barrier strip, a pair of limiting strips distributed front and back is installed at the left end of the barrier strip, and the vibration disc is started and stopped to control the movement track of materials moving and stopping between the two limiting strips. Materials are kept in a tidy and ordered arrangement state between the two limiting strips, material accumulation is avoided, the limiting strips and the blocking strips are used in cooperation so that each material cannot rub against each other on the conveying belt to generate electricity, the whole machine is grounded after the grounding frame is grounded, even if static electricity is generated, static electricity charges can flow into the ground, and the situation that the materials attract each other due to the static electricity is avoided; and collision between the material and the material taking suction head which moves rapidly due to static electricity is avoided, the material taking suction head is protected, and the problem that the material taking suction head is damaged in the material conveying process of an existing SMT patch conveying device is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of SMT chip mounting, and particularly relates to an SMT chip mounting conveying device. Background Art

[0002] During the conveying process of SMT chip mounting materials, a pick-up suction head that generates suction by vacuum is used to pick up the materials, and the materials will be transferred to the PCB board through the pick-up suction head, and the materials and the PCB board are assembled in this way.

[0003] SMT chip mounting materials are mainly electronic components used for soldering on PCB boards. For example, electronic components such as capacitors, inductors, resistors, LEDs, and chips have very small size and shape dimensions. When these materials are conveyed, they are prone to be arranged in a messy and disorderly manner. The disorderly arrangement state of the materials undoubtedly increases the conveying difficulty, causing the materials to rub against each other. Due to triboelectrification, static charges accumulate on the surface of the materials. Static electricity will not only cause damage to the electronic components and the surrounding SMT chip mounting equipment, but also the electric field generated by static electricity will change the distribution mode of positive and negative charges. The positive and negative charges attract each other, and the scattered materials gather together, and the materials are likely to collide with the pick-up suction head, easily resulting in the impact between the materials and the pick-up suction head. The moving speed of the pick-up suction head is already very fast, which increases the destructive power of the impact. The materials are easily attracted to the pick-up suction head, affecting the chip mounting operation and causing accidents. At the same time, it will damage the pick-up suction head and the materials, which is harmful to the pick-up suction head. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and solve the problem that the existing SMT chip mounting conveying device damages the pick-up suction head during the material conveying process.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an SMT chip mounting conveying device, including a grounding frame, a conveying belt is installed inside the grounding frame, a retaining strip is arranged at the upper end of the conveying belt, a tactile sensor is installed on the surface of the retaining strip, a pair of limiting strips distributed front and back are installed at the left end of the retaining strip, the lower ends between the two limiting strips are closely attached to the upper end of the conveying belt, a photoelectric sensor is installed at the upper end of the limiting strip, and a roller brush located at the upper end of the grounding frame is rotatably connected above the left side between the two limiting strips, and the front and rear ends of the roller brush are respectively rotatably connected to the upper end of the grounding frame.

[0006] In a preferred technical solution of the present invention, a slideway is arranged at the left end of the two limiting strips, a vibrating disk is installed at the left end of the slideway, an extension frame is installed at the lower end of the vibrating disk, the extension frame is installed at the left end of the grounding frame, and the vibrating disk is respectively in signal connection with the photoelectric sensor and the tactile sensor.

[0007] In a preferred technical solution of the present invention, a pair of supporting columns are fixedly connected to the upper end of the grounding frame. The upper ends of the two supporting columns are fixedly connected with a guiding cross rail. The inner ends of the two guiding cross rails are connected with a translation support column through a linear motor. A lifting cross beam is connected between the two translation support columns through a linear motor.

[0008] In a preferred technical solution of the present invention, a vacuum pump is connected to the surface of the lifting cross beam through a linear motor. The lower end of the vacuum pump is connected with a material taking suction head through a robotic arm. The material taking suction head is communicated with the vacuum pump through an air duct.

[0009] In a preferred technical solution of the present invention, a support rod is fixedly connected to the left end between the two guiding cross rails. The outer ends of the two guiding cross rails are connected with a flipping rod through a motor. A support bracket is arranged at the right end between the front and rear flipping rods. An intelligent panoramic camera is arranged in the middle of the support bracket. A joint is connected between the intelligent panoramic camera and the support bracket through a motor. Flipping brackets are connected between the front and rear ends of the support bracket and the right ends of the adjacent flipping rods through motors. Balance blocks are fixedly connected to the left sides of the outer ends of the two flipping rods.

[0010] In a preferred technical solution of the present invention, a PCB conveying track is installed at the right end of the grounding frame. A PCB board is clamped inside the PCB conveying track. Position sensors surrounding the PCB board are installed at the four corners of the upper end of the PCB conveying track.

[0011] In a preferred technical solution of the present invention, supporting strips located at the front and rear ends of the conveying belt are fixedly connected to both the front and rear ends of the stop strip. The inner ends of the two supporting strips are respectively close to the inner end of the grounding frame. The outer ends of the supporting strips and the inner end of the grounding frame are fastened by bolts.

[0012] The inside of the limiting strip is filled with a filling layer. A patch is arranged at any end of the filling layer. Reinforcing ribs are fixedly connected to one end of the patch close to the filling layer. A receiving cavity adapted to the shape of the reinforcing rib is opened at one end of the filling layer close to the patch. The reinforcing rib is embedded inside the adjacent receiving cavity. A screw rod is threadedly connected between multiple reinforcing ribs inside the same filling layer.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: The vibrating bowl conveys SMT patch materials to the inclined chute and slides them between two limit bars on the conveyor belt. The materials on the conveyor belt are leveled by the rotating roller brush. The limit bars keep the materials conveyed by the conveyor belt in a state of directional movement until the materials are conveyed to the left end of the stop bar. The photoelectric sensor and the tactile sensor are used in combination to automatically control the opening and closing of the vibrating bowl, and the vibrating bowl is opened and closed to control the movement track of the materials moving and stopping between the two limit bars. The materials are kept in an orderly arrangement between the two limit bars, avoiding material accumulation. The limit bars and the stop bar are used in combination to prevent each material from rubbing against each other and generating static electricity on the conveyor belt. After the grounding frame is grounded, the whole machine is grounded. Even if static electricity is generated, the static charge will flow into the "ground", avoiding the mutual attraction of materials caused by static electricity and also avoiding the collision between the materials and the fast-moving pick-up suction head, protecting the pick-up suction head; The vacuum pump generates suction force on the pick-up suction head for the materials, and the patch is picked up through the pick-up suction head. The robotic arm can flexibly adjust the angle and position of the pick-up suction head, and cooperate with the lifting crossbeam and the translation strut controlled by the linear motor to change the three-dimensional coordinate position of the vacuum pump and the pick-up suction head, realizing the left and right movement of the translation strut at the inner end of the guiding cross rail, and the up and down movement of the lifting crossbeam between the two translation struts, accurately adjusting the position of the gripping device in the plane and height directions to ensure that the patch on the conveyor belt can be accurately gripped and the material is placed at the specified position on the PCB. Four position sensors are used to detect whether the position of the PCB board is in place. The intelligent panoramic camera comprehensively monitors the patch on the conveyor belt and the working area of the entire conveying device. The intelligent panoramic camera relies on image recognition technology to obtain information such as the position and state of the SMT patch materials in real time. The intelligent panoramic camera strengthens the monitoring of whether the moving state of the materials is flat and smooth, realizing the accurate gripping of the patch and the effect of placing it on the PCB board. Description of the Drawings

[0014] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Installation effect diagram of the pick-up suction head of the present invention; Figure 3 Partial enlarged view of Structure A of the present invention; Figure 4 Partial enlarged view of Structure B of the present invention; Figure 5 Schematic diagram of the internal structure of the limit bar of the present invention; Figure 6 Assembly effect diagram of the patch and the filling layer of the present invention; Figure 7 Assembly drawing of the reinforcing rib and the accommodating cavity of the present invention; Figure 8 Internal structure sectional view of the filling layer of the present invention; Figure 9Distribution diagram of the reinforcing ribs of the present invention; Figure 10 Distribution diagram of the accommodation cavity of the present invention; Figure 11 Installation effect diagram of the position sensor of the present invention.

[0015] In the figure: 1. Grounding frame; 2. PCB conveying track; 3. PCB board; 4. Conveyor belt; 5. Extension frame; 6. Vibration disk; 7. Slideway; 8. Roller brush; 9. Support strip; 10. Limit strip; 11. Photoelectric sensor; 12. Tactile sensor; 13. Stop strip; 14. Support rod; 15. Guide cross rail; 16. Translation pillar; 17. Lifting cross beam; 18. Vacuum pump; 19. Material taking suction head; 20. Support column; 21. Intelligent panoramic camera; 22. Joint; 23. Flipping support; 24. Support support; 25. Flipping rod; 26. Balance weight; 27. SMT patch; 28. Filling layer; 29. Reinforcing rib; 30. Accommodation cavity; 31. Screw; 32. Position sensor. Specific implementation manner

[0016] Please refer to Figures 1-11 , the present invention provides a technical solution: an SMT patch conveying device, including a grounding frame 1, a conveyor belt 4 is installed inside the grounding frame 1, a stop strip 13 is arranged at the upper end of the conveyor belt 4, a tactile sensor 12 is installed on the surface of the stop strip 13, a pair of limit strips 10 distributed front and back are installed at the left end of the stop strip 13, the lower ends between the two limit strips 10 are closely attached to the upper end of the conveyor belt 4, a photoelectric sensor 11 is installed at the upper ends of the limit strips 10, and a roller brush 8 located at the upper end of the grounding frame 1 is rotatably connected at the upper left of the two limit strips 10, and the front and rear ends of the roller brush 8 are respectively rotatably connected to the upper end of the grounding frame 1; both the front and rear ends of the stop strip 13 are fixedly connected with support strips 9 respectively located at the front and rear ends of the conveyor belt 4, the inner ends of the two support strips 9 are respectively close to the inner end of the grounding frame 1, the outer ends of the support strips 9 and the inner end of the grounding frame 1 are fastened by bolts, the support strips 9 and the grounding frame 1 are fastened by bolts, and the stop strip 13 and the limit strips 10 are fastened by bolts. Loosening this bolt can make the limit strips 10 move back and forth along the stop strip 13. At the same time, loosening the bolts between the support strips 9 and the grounding frame 1 can adjust the position of the support strips 9. Adjusting the position of the support strips 9 can adjust the position of the stop strip 13. According to the shape of the material, the distance between the two limit strips 10 at the left end of the stop strip 13 and the left and right position of the stop strip 13 are adjusted in advance. The distance between the two limit strips 10 at the front and back is adjusted to the value consistent with the width of the material, and the left and right position of the stop strip 13 determines the position where the material taking suction head 19 picks up the material.

[0017] There are chutes 7 provided at the left ends of two limit bars 10. A vibrating bowl 6 is installed at the left end of the chute 7. An extension bracket 5 is installed at the lower end of the vibrating bowl 6. The extension bracket 5 is installed at the left end of the grounding bracket 1. The vibrating bowl 6 is respectively connected to a photoelectric sensor 11 and a tactile sensor 12 in a signal connection manner. The extension bracket 5 holds the vibrating bowl 6 at the left end of the grounding bracket 1. The inside of the conveyor belt 4 is driven by a built-in motor. The conveyor belt 4 is in a state of directional movement. The material is pre-placed into the vibrating bowl 6. The vibrating bowl 6 conveys the material to the chute 7 by vibration. The chute 7 maintains an inclination angle of about forty-five degrees towards the conveyor belt 4. The amplitude wave of the vibration of the vibrating bowl 6 is transmitted to the chute 7. The chute 7 vibrates synchronously with the vibrating bowl 6. The vibrating bowl conveys the SMT patch material to the inclined chute 7 and slides it into the space between the two limit bars 10 on the conveyor belt 4. The conveyor belt 4 conveys the material from left to right. The roller brush 8 slowly rotates by a built-in motor to gently sweep the material. The material on the conveyor belt 4 is leveled by the rotating roller brush 8. The material on the conveyor belt 4 can only move from left to right along the straight track defined by the inner ends of the limit bars 10. The limit bars 10 keep the material conveyed by the conveyor belt 4 in a state of directional movement until the material is conveyed to the left end of the stop bar 13. The material contacts the stop bar 13 and the tactile sensor 12. The stop bar 13 prevents the material from continuing to move to the right. A pair of photoelectric sensors 11 (divided into a transmitter and a receiver) detect whether the material moves by emitting and receiving infrared rays. The tactile sensor 12 will sense that the material contacts the stop bar 13. The tactile sensor 12 will convert the tactile signal into an electrical signal and feedback it to the vibrating bowl 6. The pair of photoelectric sensors 11 convert the optical signal into an electrical signal and feedback it to the vibrating bowl 6. The photoelectric sensor 11 and the tactile sensor 12 are used in combination to automatically control the opening and closing of the vibrating bowl 6. Automatically start the vibrating bowl 6 to continuously move and convey the material, while automatically closing the vibrating bowl 6 can make the material stop moving on the conveyor belt. Open and close the vibrating bowl 6 to control the movement track of the material moving and stopping between the two limit bars 10. The material maintains an orderly arrangement state between the two limit bars 10, avoiding material jamming caused by material accumulation. The limit bars 10 and the stop bar 13 are used in combination to prevent each piece of material from rubbing against each other and generating static electricity on the conveyor belt 4. After the grounding bracket 1 is grounded, the whole machine is grounded. Even if static electricity is generated, the static charge will flow into the "ground", eliminating the harm brought by static electricity, avoiding the mutual attraction of materials caused by static electricity, and also avoiding the collision between the material and the fast-moving pick-up suction head 19, protecting the pick-up suction head 19.

[0018] The interior of the limiting strip 10 is uniformly filled with a filling layer 28, and a patch 27 is provided at any end of the filling layer 28. The patch 27 is fixedly connected with a reinforcing rib 29 at one end close to the filling layer 28. The filling layer 28 is provided with a receiving cavity 30 that matches the shape of the reinforcing rib 29 at one end close to the patch 27. The reinforcing rib 29 is embedded in the adjacent receiving cavity 30. A screw 31 is threadedly connected between multiple reinforcing ribs 29 in the same filling layer 28. The filling layer 28 forms a buffer space for multiple reinforcing ribs 29 in the entire limiting strip 10. The filling layer 28 covers each reinforcing rib 29 in the same limiting strip 10, and the screw 31 is located in the same limiting strip 1 0, multiple reinforcing ribs 29 inside are connected in series to form a whole. When the SMT patch material passes through the inner end of the limiting strip 10, the external force of the material movement will be absorbed by the reinforcing ribs 29 and the screw 31 on the surface of the limiting strip 10, and the external force is evenly dispersed on the reinforcing ribs 29 and the screw 31. The cross-section of the reinforcing ribs 29 and the accommodating cavity 30 is trapezoidal, which can make the reinforcing ribs 29 firmly placed inside the accommodating cavity 30. The filling layer 28, the reinforcing ribs 29 and the screw 31 are used together to strengthen the strength of the limiting strip 10, so as to reduce the deformation of the limiting strip 10 under stress and keep the limiting strip 10 in a straight state. The limiting strip 10 is not affected by the material's external dimensions, moving posture, weight, etc.

[0019] A pair of supporting columns 20 are fixedly connected to the upper end of the ground frame 1, and a guide rail 15 is fixedly connected to the upper ends of the two supporting columns 20. The inner ends of the two guide rails 15 are connected to translation pillars 16 through linear motor transmission. A lifting beam 17 is connected between the two translation pillars 16 through linear motor transmission. The surface of the lifting beam 17 is connected to a vacuum pump 18 through a linear motor transmission. The lower end of the vacuum pump 18 is connected to a material pickup head 19 through a mechanical arm transmission. The material pickup head 19 is connected to the vacuum pump 18 through an air guide pipe. The two supporting columns 20 support the guide rail 15 in the air and place it on the upper end of the ground frame 1. The surface of the lifting beam 17 is connected to the vacuum pump 18 through a linear motor transmission. The vacuum pump 18 is connected to the material picking suction head 19, which generates suction force on the material. The material picking suction head 19 sucks the patch. The robot arm can flexibly adjust the angle and position of the material picking suction head 19, and cooperate with the lifting beam 17 and the translation support 16 controlled by the linear motor to change the three-dimensional coordinate system position of the vacuum pump 18 and the material picking suction head 19, so as to realize the left and right movement of the translation support 16 on the inner end of the guide rail 15, and the lifting beam 17 moves up and down between the two translation supports 16. The position of the grabbing device in the plane and height direction is accurately adjusted to ensure that the patch on the conveyor belt 4 can be accurately grabbed and the material can be placed at the specified position of the PCB.

[0020] At the right end of the grounding frame 1, a PCB conveying track 2 is installed. Inside the PCB conveying track 2, a PCB board 3 is clamped. When clamping the PCB board 3 inside the PCB conveying track 2, position sensors 32 surrounding the PCB board 3 are installed at the four corners of the upper end of the PCB conveying track 2. The four position sensors 32 emit infrared rays to the four corners of the PCB board 3 respectively. Taking two diagonally adjacent position sensors 32 as a pair (divided into the emitter and receiver of infrared rays), the four position sensors 32 emit and receive infrared rays according to the diagonal. The midpoints between the infrared rays of the two diagonals will intersect at an intersection point. The PCB conveying track 2 conveys the PCB board 3 to the position between the four position sensors 32. The PCB board 3 is irradiated by the infrared rays crossed by the two diagonals inside the PCB conveying track 2. The four position sensors 32 are used to detect whether the position of the PCB board 3 is placed in place, so as to achieve the effect of accurately grasping and placing components on the PCB board 3. After the component mounting process of the PCB board 3 is completed, the PCB conveying track 2 can convey the PCB board 3 with completed component mounting to the next process, realizing the continuous operation of the SMT component mounting production line and improving the accuracy and efficiency of component mounting.

[0021] A support rod 14 is fixedly connected to the left end between two guiding cross rails 15. A turning rod 25 is connected to the middle of the outer ends of the two guiding cross rails 15 through a motor. A support bracket 24 is arranged at the right end between the front and rear turning rods 25. An intelligent panoramic camera 21 is arranged in the middle of the support bracket 24. A joint 22 is connected between the intelligent panoramic camera 21 and the support bracket 24 through a motor drive. A turning support 23 is connected between the front and rear ends of the support bracket 24 and the right end of the adjacent turning rod 25 through a motor drive. A balance weight 26 is fixedly connected to the left side of the outer ends of the two turning rods 25. The motor drives the adjacent turning rod 25 to turn and tilt with the guiding cross rail 15 as the fulcrum. The front and rear two turning rods 25 simultaneously drive the adjacent turning supports 23 to deflect. The motor drives the two turning supports 23 to rotate. The two turning supports 23 simultaneously drive the support bracket 24 to rotate. The motor drives the joint to rotate to adjust the orientation of the intelligent panoramic camera 21. The weight of the balance weight 26 is consistent with the total weight sum of the intelligent panoramic camera 21, the joint 22, the turning support 23, and the support bracket 24. The balance weight 26 forms a downward gravity on the left end of the two turning rods 25. The balance weight 26 is used to keep the turning rod 25 in an inclined motion balanced, so that the intelligent panoramic camera 21 can photograph the SMT patch position from different angles, and can automatically adjust the installation position of the intelligent panoramic camera 21 according to the processing requirements. The intelligent panoramic camera 21 comprehensively monitors the patches on the conveyor belt 4 and the working area of the entire conveying device. The intelligent panoramic camera 21 relies on image recognition technology to obtain information such as the position and state of the SMT patch materials in real time. The intelligent panoramic camera 21 strengthens the monitoring of whether the moving state of the materials is flat and smooth, avoids material jamming, facilitates the operator to timely understand the operation of the equipment, and conducts quality inspection and monitoring on the patch conveying and installation processes, further ensuring the quality of SMT patch processing.

Claims

1. A SMT patch conveying device, comprising a grounding frame (1), characterized in that: A conveyor belt (4) is installed inside the grounding frame (1), a baffle (13) is arranged at the upper end of the conveyor belt (4), a tactile sensor (12) is installed on the surface of the baffle (13), a pair of limit bars (10) distributed front and back are installed at the left end of the baffle (13), the lower end between the two limit bars (10) is tightly attached to the upper end of the conveyor belt (4), a photoelectric sensor (11) is installed at the upper end of the limit bar (10), and a roller brush (8) located at the upper end of the grounding frame (1) is rotatably connected to the upper left between the two limit bars (10), and the front and rear ends of the roller brush (8) are rotatably connected to the upper end of the grounding frame (1).

2. The SMT patch conveying device according to claim 1, characterized in that: A slideway (7) is provided at the left end of the two limit bars (10), a vibration plate (6) is installed at the left end of the slideway (7), an extension frame (5) is installed at the lower end of the vibration plate (6), the extension frame (5) is installed at the left end of the ground frame (1), and the vibration plate (6) is respectively connected to the photoelectric sensor (11) and the tactile sensor (12) for signal.

3. The SMT patch conveying device according to claim 1, characterized in that: A pair of supporting columns (20) are fixedly connected to the upper end of the ground frame (1), and a guide rail (15) is fixedly connected to the upper ends of two supporting columns (20). The inner ends of the two guide rails (15) are connected to translational supports (16) via a linear motor transmission, and a lifting beam (17) is connected between the two translational supports (16) via a linear motor transmission.

4. The SMT patch conveying device according to claim 3, characterized in that: The surface of the lifting beam (17) is connected to a vacuum pump (18) via a linear motor transmission, the lower end of the vacuum pump (18) is connected to a material taking suction head (19) via a mechanical arm transmission, and the material taking suction head (19) is connected to the vacuum pump (18) via an air guide tube.

5. The SMT patch conveying device according to claim 1, characterized in that: A support rod (14) is fixedly connected at the left end between the two guide transverse rails (15); a flip rod (25) is connected to the middle of the outer ends of the two guide transverse rails (15) through a motor transmission; a support bracket (24) is arranged at the right end between the front and rear flip rods (25); an intelligent panoramic camera (21) is arranged in the middle of the support bracket (24); a joint (22) is connected between the intelligent panoramic camera (21) and the support bracket (24) through a motor transmission; a flip bracket (23) is connected to the right end of the adjacent flip rod (25) between the front and rear ends of the support bracket (24) and the right end of the flip rod (25); and a balance block (26) is fixedly connected to the left side of the outer ends of the two flip rods (25).

6. The SMT patch conveying device according to claim 1, characterized in that: A PCB conveying track (2) is installed at the right end of the grounding frame (1), a PCB board (3) is clamped inside the PCB conveying track (2), and position sensors (32) surrounding the PCB board (3) are installed at the four corners of the upper end of the PCB conveying track (2).

7. The SMT patch conveying device according to claim 1, characterized in that: The front and rear ends of the baffle bar (13) are fixedly connected to support bars (9) respectively located at the front and rear ends of the conveyor belt (4), the inner ends of the two support bars (9) are respectively close to the inner end of the ground frame (1), and the outer ends of the support bars (9) are fastened to the inner end of the ground frame (1) by bolts.

8. The SMT patch conveying device according to claim 1, characterized in that: The interior of the limiting strip (10) is uniformly filled with a filling layer (28), a patch (27) is provided at either end of the filling layer (28), a reinforcing rib (29) is fixedly connected to one end of the patch (27) close to the filling layer (28), an accommodating cavity (30) matching the shape of the reinforcing rib (29) is provided at one end of the filling layer (28) close to the patch (27), the reinforcing rib (29) is embedded in an adjacent accommodating cavity (30), and a screw (31) is threadedly connected between multiple reinforcing ribs (29) in the same filling layer (28).

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