A connector for an SMT production line

Abstract

This utility model relates to the technical field of SMT production line equipment, specifically to a connecting platform for an SMT production line. It includes a connecting base, a connecting conveyor platform mounted on top of the base, and a screening and buffer plate mounted on the conveyor platform. The screening and buffer plate is used to store defective substrates. A lifting cylinder is mounted on the bottom of the conveyor platform, and a top plate is fixedly connected to the output end of the lifting cylinder. The top plate is used to transport the defective substrates to the screening and buffer plate. An installation groove is formed in the screening and buffer plate, and a backflow preventer block is bolted into the installation groove. The backflow preventer block is used to store the substrates in layers. This utility model effectively solves the problem in the prior art where connecting platforms cannot autonomously separate qualified and defective products, requiring manual intervention for sorting and differentiation, thus increasing labor costs.

Description

Technical Field

[0001] This utility model relates to the technical field of SMT production line equipment, specifically to a connecting platform for an SMT production line. Background Technology

[0002] In the automated process of an SMT production line, the conveyor belt, as a core auxiliary device, plays a crucial role as a bridge between equipment. It can precisely connect to core production equipment such as printers, multiple placement machines, and reflow ovens. Through standardized transport tracks and speed control mechanisms, it ensures a smooth transition of PCB boards between processes, effectively avoiding issues such as board misalignment and collisions during transport. This provides a fundamental guarantee for the continuous operation of the production line and directly affects overall production efficiency and product yield. Upstream inspection equipment (such as SPI and AOI) scans the PCB board using optical, electrical, or X-ray methods to identify solder defects, component errors, short circuits / open circuits, and other problems, automatically determining whether the board is qualified by comparing it with standard parameters.

[0003] When upstream inspection equipment (such as SPI and AOI) detects defects (NG) on the PCB substrate, traditional conveyor belts typically have to stop transport, trigger an alarm, and wait for manual removal of the NG board. This approach has two main problems: First, it severely impacts production efficiency: every NG issue requires a shutdown and manual intervention, disrupting the continuous operation of the production line and reducing the overall first-pass yield. Second, existing conveyor belts lack the function of temporarily storing NG items, failing to quickly separate and temporarily store qualified and unqualified products in physical space. This results in unqualified products occupying the transport track, requiring immediate processing before production can continue. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this utility model provides a connecting platform for SMT production lines, which effectively solves the problem that existing connecting platforms cannot autonomously separate qualified and unqualified products, requiring manual intervention for sorting and differentiation, thus increasing labor costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a connecting platform for an SMT production line, including a connecting base, a connecting conveyor platform installed on the top of the connecting base for conveying inspected substrates, a screening buffer plate installed on the connecting conveyor platform for storing defective substrates, and a lifting cylinder installed at the bottom of the connecting conveyor platform. The output end of the lifting cylinder is fixedly connected to a top plate, which is used to convey defective substrates to the screening buffer plate.

[0006] According to the above-mentioned SMT production line connecting platform, the screening buffer plate has an installation groove, and a backflow prevention block is installed in the installation groove by bolts. The backflow prevention block is used to store the substrate in layers.

[0007] A fixed shaft is fixedly connected inside the check valve mounting block, and a rotating wedge is rotatably connected to the outer wall of the fixed shaft. The rotating wedge is connected to the check valve mounting block by a return spring.

[0008] The side wall of the rotating wedge has a limiting groove, and the inner wall of the anti-return blocking mounting block is fixedly connected to a limiting rod. The limiting groove is arc-shaped. In the natural state, the limiting rod abuts against one end of the limiting groove to restrict the rotation of the rotating wedge.

[0009] A limiting post is fixedly connected to the bottom of the top plate. The limiting post is inserted into a limiting tube, and the limiting tube is fixedly connected to the bottom of the connecting conveyor platform.

[0010] The technical solution provided by this utility model has the following advantages compared with the known prior art: This invention enables fully automated sorting and screening of defective substrates in SMT production lines, eliminating reliance on manual intervention. Through the linkage of a lifting cylinder, a top plate, and a screening buffer plate, this solution automatically lifts the substrate from the transport track and feeds it into the buffer structure upon receiving a defective signal. The entire process requires no manual intervention, significantly reducing labor input and avoiding quality risks caused by human error.

[0011] Furthermore, this solution enhances the continuity and safety of the production line through a layered buffer design and stable protection mechanism. The anti-reverse blocking blocks within the screening buffer stand, combined with rotating wedges, return springs, and other components, enable layered storage of defective substrates. This avoids surface damage caused by stacking multiple substrates and allows for the temporary storage of a certain number of defective products, eliminating the need for frequent shutdowns for cleaning and ensuring continuous production line operation. Simultaneously, the limiting rods and grooves restrict the angle of the rotating wedges, while the limiting posts and tubes guide the lifting and lowering of the top plate, ensuring precise and stable operation of each mechanism. This reduces the probability of equipment failure during operation, extends the service life of the connecting platform, and indirectly lowers the company's equipment maintenance and replacement costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 For the present utility model Figure 2 A magnified structural diagram of section A; Figure 4 This is a schematic diagram of the workflow of this utility model. Figure 1 ; Figure 5 This is a schematic diagram of the workflow of this utility model. Figure 2 ; Figure 6 This is a schematic diagram of the workflow of this utility model. Figure 3 ; Figure 7 This is a schematic diagram of the workflow of this utility model. Figure 4 ; Figure 8 This is a schematic diagram of the workflow of this utility model. Figure 5 ; Figure 9 This is a schematic diagram of the workflow of this utility model. Figure 6 .

[0014] Reference numerals in the attached drawings: 1. Connecting base; 2. Connecting conveyor platform; 3. Screening buffer upright plate; 4. Lifting cylinder; 5. Top plate; 6. Base plate; 7. Mounting groove; 8. Check block mounting block; 9. Fixed shaft; 10. Rotating wedge; 11. Return spring; 12. Limiting rod; 13. Limiting groove; 14. Limiting tube; 15. Limiting post. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0016] The present invention will be further described below with reference to the embodiments.

[0017] Example: Refer to Figures 1 to 3A connecting platform for an SMT production line includes a connecting base 1, a connecting conveyor platform 2 mounted on the top of the connecting base 1 for conveying inspected substrates 6, a screening buffer plate 3 mounted on the connecting conveyor platform 2 for storing defective substrates 6, and a lifting cylinder 4 mounted on the bottom of the connecting conveyor platform 2. The output end of the lifting cylinder 4 is fixedly connected to a top plate 5 for conveying defective substrates 6 to the screening buffer plate 3.

[0018] Specifically, the connecting base 1 serves as the basic support structure for the entire equipment, providing a stable installation platform for all components above, ensuring that the equipment will not shift its position due to vibration during operation; the connecting conveyor platform 2 can automatically adjust the transmission speed according to the rhythm of the upstream testing equipment, and transport the inspected substrate 6, enabling the substrate 6 to move smoothly during the transmission process, avoiding the substrate 6 from shifting or colliding due to unstable transmission.

[0019] The screening buffer plate 3 adopts a vertical structure design with multiple storage spaces reserved inside, which are specifically used to store unqualified substrates 6. It can temporarily store multiple unqualified substrates 6 to avoid unqualified substrates 6 accumulating on the conveyor track and affecting the production process. The surface of the top plate 5 is treated with anti-slip so that it can fit tightly against the bottom of the substrate 6. When a non-qualified signal is received, it is lifted by the lifting cylinder 4 to lift the unqualified substrate 6 from the conveyor track and accurately transport it to the corresponding storage layer of the screening buffer plate 3, thus completing the automatic separation of unqualified substrates 6 and qualified substrates 6.

[0020] The screening buffer plate 3 has a mounting slot 7, and a backflow preventer mounting block 8 is installed in the mounting slot 7 by bolts. The backflow preventer mounting block 8 is used to store substrates 6 in layers. The size of the mounting slot 7 is precisely matched with the backflow preventer mounting block 8 to ensure that there is no looseness after installation. The backflow preventer mounting block 8 is installed in the mounting slot 7 by bolts. The bolt connection method facilitates disassembly and adjustment later. The backflow preventer mounting block 8 is used to store substrates 6 in layers to avoid damage from stacking unqualified substrates 6.

[0021] A fixed shaft 9 is fixedly connected inside the check valve mounting block 8. A rotating wedge 10 is rotatably connected to the outer wall of the fixed shaft 9. The rotating wedge 10 and the check valve mounting block 8 are connected by a return spring 11. The fixed shaft 9 provides stable support for the rotating wedge 10. The rotating wedge 10 can rotate flexibly to support the base plate 6. The rotating wedge 10 and the check valve mounting block 8 are connected by a return spring 11, which can drive the wedge to quickly return to its original position.

[0022] A limiting groove 13 is formed on the side wall of the rotating wedge 10, and a limiting rod 12 is fixedly connected to the inner wall of the check block 8. The limiting groove 13 is arc-shaped. In its natural state, the limiting rod 12 abuts against one end of the limiting groove 13 to restrict the rotation of the rotating wedge 10. The limiting groove 13 is arc-shaped to accommodate the rotation trajectory. The limiting rod 12 is fixedly connected to the inner wall of the check block 8, and the limiting rod 12 is embedded in the limiting groove 13. The limiting rod 12 and the limiting groove 13 are used to limit the rotation angle of the rotating wedge 10 and prevent the wedge from overturning and failing.

[0023] A limiting post 15 is fixedly connected to the bottom of the top plate 5. The limiting post 15 is inserted into a limiting tube 14, which is fixedly connected to the bottom of the connecting conveyor platform 2. The limiting post 15 is made of solid metal, which is strong and not easily deformed. The limiting post 15 is inserted into the limiting tube 14, and the two slide together to ensure the smooth lifting and lowering of the top plate 5. The limiting tube 14 is fixedly connected to the bottom of the connecting conveyor platform 2 to provide guidance and support for the limiting post 15.

[0024] The working principle of this utility model is as follows: This solution primarily utilizes signal triggering and mechanism linkage to automatically divert defective substrates 6. After the testing equipment completes the inspection of the printed circuit board substrate 6, it sends a pass or fail signal to the receiving platform. The input end of the receiving conveyor platform 2 is equipped with a signal interface (existing technology) to receive the inspection signals from upstream equipment. If the receiving platform receives a pass signal, the receiving conveyor platform 2 maintains a straight-through state, and the substrate 6 enters the next process along the main track. When a fail signal is received, the control system controls the receiving conveyor platform 2 to transport the substrate 6 to a preset lifting position. At this time, a position sensor (not shown) installed on the conveyor platform detects the substrate's arrival and feeds a signal back to the controller. The controller then controls the solenoid valve of the lifting cylinder 4 to actuate, driving the piston rod of the lifting cylinder 4 to extend, driving the top plate 5 to rise, lifting the defective substrate 6 from the transport track, removing it from the main production line transport path, and preparing it for subsequent buffering.

[0025] During the buffering stage of the defective substrate 6, the layered support and anti-reverse protection mechanism ensures the stable temporary storage of substrate 6. In the natural state (without external force), the elastic force of the reset spring 11 keeps the rotating wedge 10 in a horizontally extended state. At this time, the limiting rod 12 abuts against the limiting groove 13, preventing the rotating wedge 10 from rotating downward. However, when an upward thrust is applied to the guide surface of the rotating wedge 10, the rotating wedge 10 can rotate upward, and the channel opens.

[0026] When the top plate 5 lifts the defective substrate 6 to the designated height of the screening buffer plate 3, the rotating wedge 10 inside the check block 8 is squeezed by the substrate 6 and rotates around the fixed shaft 9. After the substrate 6 has completely passed through, the return spring 11 drives the rotating wedge 10 to return to its original position, which, together with the limit rod 12 and the limit groove 13, limits its angle, thereby supporting the substrate 6 in layers within the screening buffer plate 3. Subsequently, the lifting cylinder 4 drives the top plate 5 to reset, completing the screening and buffering of a single defective substrate 6. When the number of buffered substrates reaches the threshold, the equipment alarms and stops the work of the connecting table.

[0027] It should be noted that the programmable logic controller (PLC), sensors, position sensors, and solenoid valves controlling the cylinder movement mentioned in this embodiment are all mature electrical control components in the prior art. Those skilled in the art can fully implement the above control logic through conventional electrical connections and programming settings based on the mechanical action flow described in this solution (i.e., signal received - cylinder lift - position detection - cylinder fall). Therefore, this specification will not elaborate on the specific circuit connections and control program code.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A changeover table for an SMT production line, characterized by, The system includes a connecting base (1), a connecting conveyor platform (2) installed on the top of the connecting base (1), the connecting conveyor platform (2) being used to transport the inspected substrate (6), a screening buffer plate (3) installed on the connecting conveyor platform (2), the screening buffer plate (3) being used to store the unqualified substrate (6), a lifting cylinder (4) installed at the bottom of the connecting conveyor platform (2), a top plate (5) fixedly connected to the output end of the lifting cylinder (4), the top plate (5) being used to transport the unqualified substrate (6) to the screening buffer plate (3).

2. The interface table for SMT production line according to claim 1, characterized in that, The screening buffer plate (3) has an installation slot (7) inside, and a backflow prevention block (8) is installed in the installation slot (7) by bolts. The backflow prevention block (8) is used to store the substrate (6) in layers.

3. The interface table for SMT production line according to claim 2, characterized in that, A fixed shaft (9) is fixedly connected inside the check block (8), and a rotating wedge (10) is rotatably connected to the outer wall of the fixed shaft (9). The rotating wedge (10) and the check block (8) are connected by a return spring (11).

4. The interface table according to claim 3, characterized in that, The side wall of the rotating wedge (10) is provided with a limiting groove (13), and the inner wall of the anti-return blocking mounting block (8) is fixedly connected with a limiting rod (12). The limiting groove (13) is arc-shaped. In the natural state, the limiting rod (12) abuts against one end of the limiting groove (13) to restrict the rotation of the rotating wedge (10).

5. The interface table for SMT production line according to claim 1, characterized in that, The bottom of the top plate (5) is fixedly connected to a limiting post (15), which is inserted into a limiting tube (14). The limiting tube (14) is fixedly connected to the bottom of the connecting conveyor platform (2).

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