SMT placement machine positioning structure and SMT placement machine

Abstract

The utility model discloses a kind of SMT chip mounter positioning structure and SMT chip mounter, comprising: mobile suction disc mechanism, conveying belt, proximity sensor, controller, pneumatic actuator and solenoid valve;Proximity sensor and solenoid valve are connected with controller respectively, and the air inlet of solenoid valve is connected with external compressed air source by pipeline;Pneumatic actuator is set in the target stop position of conveying belt;Proximity sensor is used for inducting the approach of the PCB board, and sends inductive signal to controller;Controller controls solenoid valve to open and start the countdown set, so that the working part protrusion of the pneumatic actuator;Controller controls conveying belt to stop moving according to the signal of countdown end;After controller receives that mobile suction disc mechanism is pasted, then the working part recovery of pneumatic actuator is controlled, and conveying belt is controlled to start moving.This technical scheme makes that PCB board can reliably stop to the set position, with higher environmental anti-interference ability.It is mainly used in the technical field of PCB production.

Description

Technical Field

[0001] This utility model relates to the field of PCB manufacturing technology, specifically to a positioning structure for an SMT placement machine and an SMT placement machine. Background Technology

[0002] A surface mount technology (SMT) pick-and-place machine is an automated device used to accurately place electronic components onto printed circuit boards (PCBs). SMT pick-and-place machines are configured in the production line after dispensing machines or screen printers, and use a moving placement head to accurately place surface mount components onto PCB pads.

[0003] When PCBs move within an SMT pick-and-place machine, they need to be positioned and stopped on the conveyor belt for inspection. Existing positioning and stopping structures typically use electromagnetic rocker arms. This method relies on an electromagnet to attract the rocker arm, which swings to create a stopping point to block the PCB. However, this method is unreliable and cannot effectively stop the PCB. Furthermore, electromagnetic attraction is susceptible to environmental electromagnetic interference, leading to decreased attraction performance. Therefore, improving the reliability of PCB positioning and stopping is a crucial technical issue that the industry urgently needs to address. Utility Model Content

[0004] This utility model provides an SMT placement machine positioning structure and an SMT placement machine to solve one or more technical problems existing in the prior art, and at least provides a beneficial option or creates conditions.

[0005] This utility model provides a positioning structure for an SMT pick-and-place machine, including: a moving suction cup mechanism, a conveyor belt, a proximity sensor, a controller, a pneumatic actuator, and a solenoid valve;

[0006] The proximity sensor and the solenoid valve are respectively connected to the controller. The pneumatic actuator is connected to the air outlet of the solenoid valve through a pipe. The air inlet of the solenoid valve is connected to an external compressed air source through a pipe.

[0007] The pneumatic actuator is positioned at the target stop position of the conveyor belt, which is used to place the PCB board; the proximity sensor is used to sense the approach of the PCB board and send a sensing signal to the controller.

[0008] The controller controls the solenoid valve to open and starts a set countdown based on the sensing signal, so that the working part of the pneumatic actuator protrudes to block the movement of the PCB board; the controller controls the conveyor belt to stop moving based on the signal that the countdown has ended; after the controller receives the signal that the moving suction cup mechanism has finished attaching the patch, it controls the working part of the pneumatic actuator to retract and controls the conveyor belt to start moving.

[0009] Furthermore, a soft rubber sleeve is provided on the working part of the pneumatic actuator.

[0010] Furthermore, the SMT placement machine positioning structure also includes a positioning plate, which is located above the conveyor belt and has a gap between it and the conveyor belt, through which the PCB board passes.

[0011] Furthermore, the proximity sensor is a photoelectric proximity switch.

[0012] Furthermore, the controller is a PLC controller.

[0013] Furthermore, the surface of the conveyor belt is provided with a frosted granular texture.

[0014] On the other hand, an SMT placement machine is provided, including: an SMT placement machine body, wherein the SMT placement machine body is provided with: a placement area, a moving suction cup mechanism, a conveyor belt, a proximity sensor, a controller, a pneumatic actuator and a solenoid valve;

[0015] The conveyor belt, proximity sensor, and pneumatic actuator are all installed in the patch area. The proximity sensor and solenoid valve are respectively connected to the controller. The pneumatic actuator is connected to the air outlet of the solenoid valve through a pipe. The air inlet of the solenoid valve is connected to an external compressed air source through a pipe.

[0016] The pneumatic actuator is positioned at the target stop position of the conveyor belt, which is used to place the PCB board; the proximity sensor is used to sense the approach of the PCB board and send a sensing signal to the controller.

[0017] The controller controls the solenoid valve to open and starts a set countdown based on the sensing signal, so that the working part of the pneumatic actuator protrudes to block the movement of the PCB board; the controller controls the conveyor belt to stop moving based on the signal that the countdown has ended; after the controller receives the signal that the moving suction cup mechanism has finished attaching the patch, it controls the working part of the pneumatic actuator to retract and controls the conveyor belt to start moving.

[0018] Furthermore, a soft rubber sleeve is provided on the working part of the pneumatic actuator.

[0019] Furthermore, the SMT placement machine body is also provided with a first cover door, which is used to cover the placement area.

[0020] Furthermore, the first cover door is provided with a transparent window.

[0021] This invention has at least the following beneficial effects: By incorporating a proximity sensor, controller, solenoid valve, and pneumatic actuator, it utilizes compressed air as the power source for the pneumatic actuator. The proximity sensor detects the PCB board being transported by the conveyor belt, and the solenoid valve allows the compressed air to quickly act on the pneumatic actuator. This enables the pneumatic actuator to block the forward movement of the PCB board through its working part, thus reliably stopping the PCB board at the set position. Furthermore, because the entire actuator uses pneumatic actuation, the entire movement is highly reliable and has strong environmental interference resistance. This invention is primarily applicable to the field of PCB manufacturing technology. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0023] Figure 1 This is a top view of the positioning structure of an SMT pick and place machine;

[0024] Figure 2 This is a side view of the positioning structure of an SMT pick and place machine;

[0025] Figure 3 This is a schematic diagram of the controller's connection system structure;

[0026] Figure 4 This is a 3D structural diagram of an SMT pick and place machine. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] It should be noted that although functional modules are divided in the system diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the system or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0029] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 This is a top view of the positioning structure of an SMT pick and place machine; Figure 2 This is a side view of the positioning structure of an SMT pick and place machine; Figure 3 This is a schematic diagram of the connection system structure of controller 400; Figure 4 This is a 3D structural diagram of an SMT pick and place machine.

[0030] The purpose of this utility model is to improve the reliability of positioning of PCB board 300 during transmission.

[0031] Therefore, this application provides a positioning structure for an SMT pick-and-place machine. The SMT pick-and-place machine positioning structure includes: a moving suction cup mechanism 100, a conveyor belt 200, a proximity sensor 210, a controller 400, a pneumatic actuator 220, and a solenoid valve 420.

[0032] The proximity sensor 210 and the solenoid valve 420 are respectively connected to the controller 400. The pneumatic actuator 220 is connected to the air outlet of the solenoid valve 420 through a pipe. The air inlet of the solenoid valve 420 is connected to an external compressed air source 410 through a pipe.

[0033] The pneumatic actuator 220 is positioned at the target stop position of the conveyor belt 200, which is used to place the PCB board 300; the proximity sensor 210 is used to sense the approach of the PCB board 300 and send a sensing signal to the controller 400.

[0034] The controller 400 controls the solenoid valve 420 to open and start a set countdown according to the sensing signal, so that the working part of the pneumatic actuator 220 protrudes to block the movement of the PCB board 300; the controller 400 controls the conveyor belt 200 to stop moving according to the signal that the countdown has ended; after the controller 400 receives the signal that the moving suction cup mechanism 100 has finished attaching the patch, it controls the working part of the pneumatic actuator 220 to retract and controls the conveyor belt 200 to start moving.

[0035] To better illustrate the positioning structure of this SMT placement machine, this specific embodiment is described from the perspective of the SMT placement machine.

[0036] This specific embodiment provides an SMT placement machine, which includes an SMT placement machine body. The SMT placement machine body refers to a device with basic functions for placing electronic components.

[0037] The SMT placement machine body is equipped with: a placement area, a moving suction cup mechanism 100, a conveyor belt 200, a proximity sensor 210, a controller 400, a pneumatic actuator 220, and a solenoid valve 420.

[0038] The conveyor belt 200, proximity sensor 210, and pneumatic actuator 220 are all installed in the patch area.

[0039] In some further specific embodiments, the proximity sensor 210 is a photoelectric proximity switch. The controller 400 is a PLC controller.

[0040] The mounting area is the working area where the mobile suction cup mechanism 100 places electronic components on the PCB board 300.

[0041] The conveyor belt 200 is set in the mounting area. The function of the conveyor belt 200 is to transport the PCB board 300 to the corresponding position in the mounting area.

[0042] The movable suction cup mechanism 100 is a mechanism that can transport electronic components to corresponding positions on the PCB board 300. Generally, the mechanism consists of a suction cup nozzle and a corresponding movable robotic arm. The movable robotic arm moves to drive the suction cup nozzle to pick up the electronic components from the feed port (vibrating feeder), and then moves the electronic components to the surface mount area and places them in the corresponding positions on the PCB board 300.

[0043] To ensure that the PCB board 300 reliably stops at the designated target position while being transported by the conveyor belt 200, a blocking structure is provided in the middle of the conveyor belt 200. This blocking structure consists of a proximity sensor 210 and a pneumatic actuator 220. The proximity sensor 210 detects the approach of the PCB board 300, while the pneumatic actuator 220 blocks its forward movement. The overall blocking action is controlled by a controller 400. The output of the proximity sensor 210 is connected to the input of the controller 400.

[0044] The pneumatic actuator 220 is powered by a compressed air source 410. To ensure that the compressed air source 410 can effectively control the pneumatic actuator 220, a solenoid valve 420 can be used to control the gas output from the compressed air source 410.

[0045] The pneumatic actuator 220 is connected to the outlet of the solenoid valve 420 via a pipe, and the inlet of the solenoid valve 420 is connected to an external compressed air source 410 via a pipe. The solenoid valve 420 is connected to the controller 400.

[0046] When the PCB board 300 is moved by the conveyor belt 200, it enters the sensing area of ​​the proximity sensor 210, which generates a corresponding sensing signal. This signal is transmitted to the controller 400, which then controls the solenoid valve 420 to open and simultaneously starts a pre-set countdown. At this time, the compressed air from the compressed air source 410 acts on the pneumatic actuator 220 through a pipe. The working part of the pneumatic actuator 220 protrudes, blocking the forward movement of the PCB board 300 and thus confining it to a set position.

[0047] On the other hand, in order to prevent the PCB board 300 from continuing to move forward due to the movement of the conveyor belt 200, the controller 400 will also control the conveyor belt 200 to stop moving when it receives the signal that the countdown has ended.

[0048] When the PCB board 300 stops at the set position, the moving suction cup mechanism 100 performs the placement operation. After the moving suction cup mechanism 100 completes the placement operation, it transmits a completion signal to the controller 400. Once the controller 400 confirms that the moving suction cup mechanism 100 has completed the placement work, it controls the working part of the pneumatic actuator 220 to retract and controls the conveyor belt 200 to start moving. Specifically, the controller 400 controls the solenoid valve 420 to close, preventing pressurized gas from the compressed air source 410 from entering the pneumatic actuator 220, causing the working part of the pneumatic actuator 220 to retract rapidly under the action of an internal spring. Simultaneously, the controller 400 also controls the conveyor belt 200 to start moving, allowing the conveyor belt 200 to carry the PCB board 300 away to the next work station.

[0049] This invention utilizes a proximity sensor 210, a controller 400, a solenoid valve 420, and a pneumatic actuator 220, with a compressed air source 410 providing power to the actuator 220. The proximity sensor 210 detects the PCB board 300 transported by the conveyor belt 200, and the solenoid valve 420 ensures that the compressed air from the compressed air source 410 quickly acts on the pneumatic actuator 220. This allows the actuator 220 to block the forward movement of the PCB board 300 through its working part, reliably stopping the PCB board 300 at a set position. Furthermore, because the entire actuator uses a pneumatic actuation method, the entire movement is highly reliable and has strong environmental interference resistance.

[0050] To prevent the working part of the pneumatic actuator 220 from damaging the PCB board 300, in some further embodiments, a soft rubber sleeve is provided on the working part of the pneumatic actuator 220. The soft rubber sleeve acts as a buffer between the working part of the pneumatic actuator 220 and the PCB board 300, thereby protecting the PCB board 300 from damage.

[0051] To ensure the PCB board 300 is stably positioned on the conveyor belt 200, in some further embodiments, a positioning plate 310 is also provided on the SMT placement machine positioning structure. The positioning plate 310 is located above the conveyor belt 200, and a gap exists between the positioning plate 310 and the conveyor belt 200, through which the PCB board 300 passes. In some further embodiments, the surface of the conveyor belt 200 is provided with a frosted textured structure. By providing a frosted textured structure on the surface of the conveyor belt 200, the friction between the PCB board 300 and the surface of the conveyor belt 200 can be increased, preventing the PCB board 300 from falling off.

[0052] The SMT placement machine body is also equipped with a first cover door to cover the placement area. This first cover door has a transparent window. The cover door prevents unrelated items from entering the placement area. Furthermore, the transparent window allows workers to observe the work being done in the placement area.

[0053] Although the description of this application has been quite detailed and particularly focused on several described embodiments, it is not intended to limit itself to any of these details or embodiments or any particular embodiment. Rather, it should be considered as effectively covering the intended scope of this application by referring to the appended claims and taking into account the broad possible interpretations of these claims provided by the prior art. Furthermore, the foregoing description of this application with respect to embodiments foreseeable by the inventor is intended to provide a useful description, and non-substantial modifications to this application that have not yet been foreseen may still represent equivalent modifications.

Claims

1. A positioning structure for an SMT pick and place machine, characterized in that, include: The components include a mobile suction cup mechanism, a conveyor belt, a proximity sensor, a controller, a pneumatic actuator, and a solenoid valve. The proximity sensor and the solenoid valve are respectively connected to the controller. The pneumatic actuator is connected to the air outlet of the solenoid valve through a pipe. The air inlet of the solenoid valve is connected to an external compressed air source through a pipe. The pneumatic actuator is positioned at the target stop position of the conveyor belt, which is used to place the PCB board; the proximity sensor is used to sense the approach of the PCB board and send a sensing signal to the controller. The controller controls the solenoid valve to open and starts a set countdown based on the sensing signal, so that the working part of the pneumatic actuator protrudes to block the movement of the PCB board; the controller controls the conveyor belt to stop moving based on the signal that the countdown has ended; after the controller receives the signal that the moving suction cup mechanism has finished attaching the patch, it controls the working part of the pneumatic actuator to retract and controls the conveyor belt to start moving.

2. The SMT placement machine positioning structure according to claim 1, characterized in that, The working part of the pneumatic actuator is equipped with a soft rubber sleeve.

3. The SMT placement machine positioning structure according to claim 1, characterized in that, It also includes a positioning plate, which is located above the conveyor belt and has a gap between the positioning plate and the conveyor belt, through which the PCB board passes.

4. The SMT placement machine positioning structure according to claim 1, characterized in that, The proximity sensor is a photoelectric proximity switch.

5. The SMT placement machine positioning structure according to claim 1, characterized in that, The controller is a PLC controller.

6. The positioning structure for an SMT placement machine according to claim 1, characterized in that, The surface of the conveyor belt is provided with a frosted granular texture.

7. An SMT placement machine, characterized in that, include: The SMT placement machine body includes: a placement area, a moving suction cup mechanism, a conveyor belt, a proximity sensor, a controller, a pneumatic actuator, and a solenoid valve. The conveyor belt, proximity sensor, and pneumatic actuator are all installed in the patch area. The proximity sensor and solenoid valve are respectively connected to the controller. The pneumatic actuator is connected to the air outlet of the solenoid valve through a pipe. The air inlet of the solenoid valve is connected to an external compressed air source through a pipe. The pneumatic actuator is positioned at the target stop position of the conveyor belt, which is used to place the PCB board; the proximity sensor is used to sense the approach of the PCB board and send a sensing signal to the controller. The controller controls the solenoid valve to open and starts a set countdown based on the sensing signal, so that the working part of the pneumatic actuator protrudes to block the movement of the PCB board; the controller controls the conveyor belt to stop moving based on the signal that the countdown has ended; after the controller receives the signal that the moving suction cup mechanism has finished attaching the patch, it controls the working part of the pneumatic actuator to retract and controls the conveyor belt to start moving.

8. An SMT placement machine according to claim 7, characterized in that, The working part of the pneumatic actuator is equipped with a soft rubber sleeve.

9. An SMT placement machine according to claim 7, characterized in that, The SMT placement machine body is also provided with a first cover door, which is used to cover the placement area.

10. An SMT placement machine according to claim 9, characterized in that, The first cover door is equipped with a transparent window.

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