Automatic surface mounting device for circuit board

Abstract

The invention relates to the technical field of circuit board mounting, in particular to an automatic circuit board mounting device which comprises a shell. The two conveying mechanisms are symmetrically arranged in the shell up and down and are used for conveying circuit boards; the chip mounting mechanism is arranged in the shell and is used for carrying out chip mounting operation on the circuit boards on the two conveying mechanisms at the same time; the two feeding mechanisms are used for providing to-be-pasted components; and the two feeding mechanisms are used for supplementing components. According to the automatic chip mounting device for the circuit boards, two circuit boards can be conveyed at the same time by arranging the two conveying mechanisms which are symmetrical up and down, chip mounting operation can be carried out on the upper circuit board and the lower circuit board at the same time through the chip mounting mechanism, and the chip mounting efficiency is improved exponentially. The equipment is simple in structure, compared with traditional equipment, synchronous chip mounting of the two chip mounting ends can be achieved only by configuring one chip mounting control unit for precise control, the equipment is suitable for batch production of PCBs, and the conversion rate of production cost can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board mounting, in particular to an automatic circuit board mounting device. Background Art

[0002] Mounter: Also known as "mounting machine" or "surface mounting system", it is placed after the dispensing machine or screen printer in the production line. It is a device that accurately places surface mount components on the PCB pads by moving the mounting head.

[0003] Existing circuit board placement machines all use single-station operation, and each device can only place a circuit board at a time, which is inefficient. Automatic placement equipment has a variety of precision-controlled components, which are expensive and have high maintenance costs. Currently, the only way to increase the number of placement machines is to increase the number of operating stations, which leads to increased production costs. Summary of the invention

[0004] The purpose of the embodiment of the present invention is to provide an automatic circuit board mounting device, which solves the problem that the current circuit board mounting adopts a single-station operation and has low efficiency.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A circuit board automatic patch device, comprising a housing;

[0007] Two conveying mechanisms are symmetrically arranged in the housing and are used to convey the circuit board;

[0008] A patch mechanism, disposed in the housing, for simultaneously performing patch operations on the circuit boards on the two conveying mechanisms;

[0009] Two feeding mechanisms for providing components to be mounted;

[0010] Two loading mechanisms for replenishing components.

[0011] As a preferred technical solution, the conveying mechanism includes a fixed frame fixed in the shell, and two symmetrical side grooves are provided inside the fixed frame. First conveyor belts are provided in the side grooves, and the first conveyor belts are used to convey circuit boards.

[0012] As a preferred technical solution, detectors are fixedly installed on opposite sides of the two fixing frames for detecting the position of the circuit board.

[0013] As a preferred technical solution, the patch mechanism includes a first fixed frame fixed in the shell, the first fixed frame is provided with a first linear motor, the first linear motor is driven and connected to a sliding frame, the sliding frame is provided with a second linear motor, the second linear motor is driven and connected to a machine base, the machine base is provided with two upper and lower symmetrical driving cylinders, and the output end of the driving cylinder is connected to a negative pressure suction nozzle.

[0014] As a preferred technical solution, the patch mechanism further includes a second fixing frame fixedly mounted in the housing, a guide rod is fixedly mounted on the second fixing frame, and one end of the sliding frame is slidably mounted on the guide rod.

[0015] As a preferred technical solution, the feeding mechanism includes a mounting seat fixed on one side of the fixed frame, two transmission shafts are rotatably mounted on one side of the mounting seat, a synchronous belt is connected between the two transmission shafts, and a plurality of suction cups are equidistantly distributed on the surface of the synchronous belt.

[0016] As a preferred technical solution, a first baffle is fixedly provided on one side of the mounting seat, and a second baffle is fixedly connected to one side of the first baffle through a connecting block, the first baffle and the second baffle seal both sides of the synchronous belt respectively, and a cavity is formed between the first baffle, the second baffle and the synchronous belt, and an air intake pipe is fixedly provided on the second baffle, one end of the air intake pipe is connected to the inside of the cavity, and the other end is used to connect the negative pressure device;

[0017] One end of the suction cup is communicated with the interior of the cavity.

[0018] As a preferred technical solution, teeth are provided on the inner wall of the synchronous belt, a synchronous gear is fixedly connected to the surface of the transmission shaft, and the synchronous gear is meshed with the teeth.

[0019] As a preferred technical solution, the feeding mechanism is a second conveyor belt.

[0020] As a preferred technical solution, the two fixing frames are fixedly connected via a support column, and the bottom of one of the fixing frames is fixedly connected to the inner wall of the shell via a support frame.

[0021] By means of the above technical solution, the present invention provides an automatic circuit board placement device, which has at least the following beneficial effects:

[0022] (1) The automatic circuit board mounting device can transport two circuit boards at the same time by setting up two upper and lower symmetrical conveying mechanisms. Through the mounting mechanism, the mounting operation can be performed on the upper and lower circuit boards at the same time, which doubles the mounting efficiency. The equipment has a simple structure. Compared with traditional equipment, only one set of mounting control unit for precise control is required to achieve synchronous mounting of two mounting ends. It is suitable for mass production of PCB boards and can improve the conversion rate of production costs.

[0023] (2) The automatic circuit board mounting device, by setting up two loading mechanisms, can cooperate with two feeding mechanisms respectively to add new components to the feeding mechanisms. By setting up two feeding mechanisms, components with patches can be provided to the mounting mechanisms from the upper and lower directions respectively, which is convenient for the mounting mechanisms to take materials, so that the various mechanisms can cooperate smoothly to achieve uninterrupted mounting operations, further ensuring the mounting efficiency.

[0024] (3) The automatic circuit board placement device is provided with two upper and lower symmetrical suction nozzles on the placement mechanism, so that the suction force of the two suction nozzles can be simultaneously controlled by the same negative pressure device, and the movement of the two suction nozzles can also be simultaneously controlled by the first linear motor and the second linear motor, thereby reducing the setting of control components and reducing production costs.

[0025] (4) The automatic circuit board mounting device can detect the positions of the two circuit boards by setting two detectors to ensure that the two circuit boards are in a vertically symmetrical state during mounting, thereby improving the accuracy of mounting and ensuring the quality of mounting. By setting the first baffle and the second baffle, a cavity can be formed between the synchronous belt and the cavity. By controlling the air pressure inside the cavity, a vacuum environment can be provided for the suction cup, thereby improving the suction effect of the suction cup on the components to overcome the gravity of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0027] Figure 1 is a first cross-sectional view of a housing in an embodiment of the present invention;

[0028] Figure 2 is a second cross-sectional view of the housing in the embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the housing in an embodiment of the present invention;

[0030] Figure 4 Schematic diagram of two conveying mechanisms in an embodiment of the present invention;

[0031] Figure 5 Schematic diagram of a patch mechanism in an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the connection between the mounting base and the fixing frame in an embodiment of the present invention;

[0033] Figure 7 Schematic diagram of a feeding mechanism in an embodiment of the present invention;

[0034] Figure 8It is a schematic diagram of the structure of the suction cup in an embodiment of the present invention;

[0035] Fig. 9 Schematic diagram of a connection block in an embodiment of the present invention.

[0036] In the figure: 1. shell; 2. conveying mechanism; 21. fixed frame; 211. side groove; 22. first conveyor belt; 23. detector; 3. patch mechanism; 31. first fixed frame; 32. first linear motor; 33. sliding frame; 34. second linear motor; 35. machine base; 36. driving cylinder; 37. negative pressure nozzle; 38. second fixed frame; 39. guide rod; 4. feeding mechanism; 41. mounting seat; 42. transmission shaft; 421. synchronous gear; 43. synchronous belt; 431. teeth; 44. suction cup; 45. first baffle; 46. connecting block; 47. second baffle; 48. suction pipe; 5. feeding mechanism; 6. support frame; 7. support column. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] A placement machine is a device that accurately places surface mount components on PCB pads by moving the placement head. Existing circuit board placement machines all use single-station operation, and each device can only place a patch on one circuit board at a time, which is inefficient. Automatic placement equipment has a variety of precision-controlled components, which are expensive and have high maintenance costs. Currently, the only way to increase the number of placement machines is to increase the number of operating stations, which leads to increased production costs. In view of this, we propose an automatic circuit board placement device

[0039] See also Figure 1-Figure 9 The automatic circuit board mounting device comprises a housing 1 and a conveying mechanism 2, a mounting mechanism 3, a feeding mechanism 4 and a loading mechanism 5 arranged in the housing 1.

[0040] Among them, there are two conveying mechanisms 2, which are symmetrical up and down and are used to convey two circuit boards at the same time. The patch mechanism 3 is set in the middle position of the two conveying mechanisms 2, and is used to perform patch operations on the circuit boards on the two conveying mechanisms 2 at the same time, thereby doubling the patch efficiency. Correspondingly, the number of feeding mechanisms 4 and the number of loading mechanisms 5 are both two. The two feeding mechanisms 4 provide the patch mechanism 3 with components to be mounted from the upper and lower directions respectively, which is convenient for the patch mechanism 3 to take materials. The two loading mechanisms 5 cooperate with the two feeding mechanisms 4 respectively to add new components to the feeding mechanism 4, so that each mechanism can cooperate smoothly, realize uninterrupted patch operation, and further ensure patch efficiency.

[0041] Specifically, the conveying mechanism 2 in this embodiment includes a fixed frame 21 fixed in the housing 1, and two symmetrical side grooves 211 are provided inside the fixed frame 21. The first conveyor belts 22 are arranged in the two side grooves 211. The two first conveyor belts 22 are respectively in contact with the non-patch areas of the two side edges of the circuit board, so as to convey the circuit board. During transportation, one side of the circuit board contacts the first conveyor belt 22, and the other side contacts the inner wall of the side groove 211, so as to play a limiting role and improve the stability during transportation.

[0042] See also Figure 4 , detectors 23 are fixedly installed on the opposite sides of the two fixing frames 21. The two detectors 23 are used to detect the positions of the two circuit boards respectively, play a positioning role, ensure that the two circuit boards are in a vertically symmetrical state during patching, and improve the accuracy of patching. In this embodiment, the detector 23 is a laser rangefinder, which detects the distance between the two circuit boards and the detector 23 by laser, thereby confirming the position of the circuit boards.

[0043] To achieve the purpose of fixation, the two fixed frames 21 are fixedly connected by the support column 7, and the bottom of one of the fixed frames 21 is fixedly connected to the inner wall of the housing 1 through the support frame 6. The support column 7 and the support frame 6 are used to support the two fixed frames 21 and fix the two fixed frames 21 in the housing 1 to improve the stability of the two fixed frames 21. In addition, the support column 7 is also used to lift one of the fixed frames 21 so that the distance between the two fixed frames 21 can be used for the patch mechanism 3 to work.

[0044] See also Figure 5The patch mechanism 3 includes a first fixed frame 31 fixed in the housing 1. The first fixed frame 31 is "H" shaped, spanning the outside of a fixed frame 21, and the two legs at the bottom are fixedly connected to the housing 1, and the two legs at the top extend upward and are free ends. A first linear motor 32 is arranged on one side of the first fixed frame 31, and the first linear motor 32 is driven and connected to a sliding frame 33. The first linear motor 32 can drive the sliding frame 33 to move along the width direction of the fixed frame 21. A second linear motor 34 is arranged on the sliding frame 33, and the second linear motor 34 is driven and connected to a base 35. The base 35 can be driven to move along the length direction of the fixed frame 21 by the second linear motor 34. Two symmetrical driving cylinders 36 are arranged on the base 35, and the output ends of the two driving cylinders 36 are connected to negative pressure suction nozzles 37. The negative pressure suction nozzle 37 and the negative pressure device (not shown in the figure) are used to suck components by negative pressure. After sucking, the two components are moved to the specified position by the cooperation of the first linear motor 32 and the second linear motor 34 to perform patching.

[0045] In order to improve the stability of the movement of the base 35, the patch mechanism 3 also includes a second fixed frame 38 fixed in the housing 1. The shape of the second fixed frame 38 is the same as that of the first fixed frame 31. A guide rod 39 is fixed between the two legs at the top of the second fixed frame 38. A slider is slidably connected to the surface of the guide rod 39. One end of the sliding frame 33 is fixedly connected to the slider, so that it is slidably mounted on the guide rod 39 through the slider. By providing the guide rod 39, the sliding frame 33 can be limited, and at the same time, the forces at both ends of the sliding frame 33 are more balanced, thereby improving the stability of the sliding frame 33 during movement, thereby ensuring the stability of the patch work.

[0046] By performing patching in this way, on the one hand, the length and size of the two negative pressure nozzles 37 can be kept the same, the distance between the negative pressure control end and the two negative pressure nozzles 37 can be kept the same, and the movement stroke of the gas between the negative pressure control end and the two negative pressure nozzles 37 is the same, so that the adsorption effect of the two negative pressure nozzles 37 can be synchronized, achieving synchronous patching and ensuring the efficiency and quality of the patch. On the other hand, by performing bidirectional patching in an upper and lower symmetrical manner, the structure remains compact, the space height is effectively utilized, the floor space of the equipment is reduced, and the floor space cost of the equipment is reduced. In addition, the structure of this set of equipment is simple. Compared with traditional equipment, only one set of patch control unit for precise control is still required to achieve synchronous patching of the two patch ends. It is suitable for mass production of PCB boards and can greatly improve the conversion rate of production costs.

[0047] Combination Figure 6 and Figure 7As shown, the feeding mechanism 4 includes a mounting seat 41 fixed on one side of the fixed frame 21, and two transmission shafts 42 are rotatably mounted on the side of the mounting seat 41 away from the fixed frame 21, and a synchronous belt 43 is connected between the two transmission shafts 42, and the synchronous belt 43 is used to transport components. Further, there are multiple suction cups 44 equidistantly distributed on the surface of the synchronous belt 43, and the suction cups 44 are used to absorb the components to be mounted, so that the components can make a circular motion with the operation of the synchronous belt 43, thereby moving the free surface of the components to a downward state, so that the patch mechanism 3 can mount the components above. One of the transmission shafts 42 is driven and connected to a motor, and the motor drives the transmission shaft 42 to rotate, thereby rotating the synchronous belt 43.

[0048] In this embodiment, a first baffle 45 is fixedly provided on one side of the mounting seat 41, and a second baffle 47 is fixedly connected to the side of the first baffle 45 away from the mounting seat 41 through a connecting block 46. By setting the connecting block 46, the second baffle 47 can be fixed, so that the second baffle 47 remains stable. The first baffle 45 and the second baffle 47 seal the two sides of the synchronous belt 43 respectively, and a cavity is formed between the first baffle 45, the second baffle 47 and the synchronous belt 43, and one end of the suction cup 44 is connected to the inside of the cavity. By controlling the air pressure inside the cavity, a vacuum environment can be provided for the suction cup 44, thereby improving the suction effect of the suction cup 44 on the components, so that the components can move with the suction cup 44, and the suction force of the suction cup 44 is greater than the gravity of the components, and less than the suction force of the negative pressure suction nozzle 37, so that the components can be transferred between the suction cup 44 and the negative pressure suction nozzle 37. An air intake pipe 48 is fixedly provided on the second baffle 47. One end of the air intake pipe 48 is connected to the inside of the cavity, and the other end is used to connect to a negative pressure device. The negative pressure device is used to control the air pressure in the cavity to provide or relieve negative pressure.

[0049] In this embodiment, teeth 431 are provided on the inner wall of the synchronous belt 43, and a synchronous gear 421 is fixedly connected to the surface of the transmission shaft 42. The synchronous gear 421 meshes with the teeth 431 to increase the stability of the transmission between the synchronous belt 43 and the transmission shaft 42, thereby improving the stability of the conveying.

[0050] In this embodiment, the loading mechanism 5 is a second conveyor belt to drive the component tray to move along a specified direction.

[0051] When the automatic circuit board placement device of the present invention is in use, the machine base 35 is moved between the two feeding mechanisms 4 by the first linear motor 32 and the second linear motor 34, and the two driving cylinders 36 are started at the same time, and the output ends of the two driving cylinders 36 are extended, thereby shortening the distance between the two negative pressure suction nozzles 37 and the two synchronous belts 43, and the negative pressure device is used to suck the gas inside the negative pressure suction nozzle 37, so that the suction force of the negative pressure suction nozzle 37 on the components is greater than the suction force of the suction cup 44 on the components, thereby sucking the components off the suction cup 44. Subsequently, the first linear motor 32 and the second linear motor 34 cooperate to move the two components to the specified position for placement.

[0052] When a pair of circuit boards are finished with patching, the first conveyor belt 22 is started to convey the mounted circuit boards out of the device, and two new circuit boards are placed on the two conveying mechanisms 2. The circuit boards move along with the first conveyor belt 22. During the movement, the position of the circuit boards is detected by the detector 23. When the circuit boards move to the specified position, the first conveyor belt 22 stops running. When both first conveyor belts 22 stop running, a new round of patching work can be started.

[0053] During the patch process, it is necessary to replenish the components on the feeding mechanism 4 in a timely manner, and the method is: place the tray containing the components on the upper surface of the second conveyor belt, and convey the tray during the operation of the second conveyor belt. At the same time, the transmission shaft 42 rotates under the drive of the external motor, and the transmission shaft 42 drives the synchronous belt 43 to move along the circular track through the meshing of the synchronous gear 421 and the teeth 431, thereby driving the suction cup 44 thereon to move. Since the suction pipe 48 is connected to the external negative pressure equipment, the air in the cavity surrounded by the synchronous belt 43, the first baffle 45 and the second baffle 47 is sucked, so that the inside of the cavity is always in a negative pressure state. Therefore, during the movement of the synchronous belt 43, if there are no components adsorbed on the suction cup 44, when the suction cup 44 moves to the top of the tray, it can automatically absorb the components in the tray and drive the components to move, so as to achieve continuous feeding.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit board automatic placement device, characterized in that: include: Housing (1); Two conveying mechanisms (2) are symmetrically arranged in the housing (1) and are used to convey circuit boards; A patch mechanism (3) is arranged in the housing (1) and is used to simultaneously perform patch operations on the circuit boards on the two conveying mechanisms (2); Two feeding mechanisms (4) for providing components to be mounted; Two feeding mechanisms (5) are used to replenish components.

2. The automatic circuit board mounting device according to claim 1, characterized in that: The conveying mechanism (2) comprises a fixed frame (21) fixedly arranged in the housing (1), wherein two symmetrical side grooves (211) are provided inside the fixed frame (21), and first conveying belts (22) are arranged in each of the side grooves (211), and the first conveying belts (22) are used for conveying circuit boards.

3. The automatic circuit board mounting device according to claim 2, characterized in that: A detector (23) is fixedly mounted on the opposite sides of the two fixing frames (21) for detecting the position of the circuit board.

4. The automatic circuit board mounting device according to claim 1, characterized in that: The patch mechanism (3) comprises a first fixed frame (31) fixed in the shell (1), the first fixed frame (31) is provided with a first linear motor (32), the first linear motor (32) is drivingly connected to a sliding frame (33), the sliding frame (33) is provided with a second linear motor (34), the second linear motor (34) is drivingly connected to a machine base (35), the machine base (35) is provided with two vertically symmetrical driving cylinders (36), and the output end of the driving cylinder (36) is connected to a negative pressure suction nozzle (37).

5. The automatic circuit board mounting device according to claim 4, characterized in that: The patch mechanism (3) further comprises a second fixed frame (38) fixedly mounted in the housing (1), a guide rod (39) being fixedly mounted on the second fixed frame (38), and one end of the sliding frame (33) being slidably mounted on the guide rod (39).

6. The automatic circuit board placement device according to claim 2, characterized in that: The feeding mechanism (4) comprises a mounting seat (41) fixedly mounted on one side of the fixed frame (21); two transmission shafts (42) are rotatably mounted on one side of the mounting seat (41); a synchronous belt (43) is connected between the two transmission shafts (42); and a plurality of suction cups (44) are evenly distributed on the surface of the synchronous belt (43).

7. The automatic circuit board mounting device according to claim 6, characterized in that: A first baffle (45) is fixedly provided on one side of the mounting seat (41), and a second baffle (47) is fixedly connected to one side of the first baffle (45) through a connecting block (46), the first baffle (45) and the second baffle (47) respectively seal the two sides of the synchronous belt (43), and a cavity is formed between the first baffle (45), the second baffle (47) and the synchronous belt (43), and an air intake pipe (48) is fixedly provided on the second baffle (47), one end of the air intake pipe (48) is connected to the inside of the cavity, and the other end is used to connect to a negative pressure device; One end of the suction cup (44) is in communication with the interior of the cavity.

8. The automatic circuit board mounting device according to claim 6, characterized in that: The inner wall of the synchronous belt (43) is provided with teeth (431), and the surface of the transmission shaft (42) is fixedly connected with a synchronous gear (421), and the synchronous gear (421) is meshed with the teeth (431).

9. The automatic circuit board mounting device according to claim 1, characterized in that: The feeding mechanism (5) is a second conveyor belt.

10. The automatic circuit board placement device according to claim 2, characterized in that: The two fixed frames (21) are fixedly connected via a support column (7), and the bottom of one of the fixed frames (21) is fixedly connected to the inner wall of the housing (1) via a support frame (6).

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