Automatic clamp device for selecting welding

Abstract

The utility model is suitable for the selective welding technical field provides a kind of selective welding automatic pressing plate device, including support frame, mounting plate, drive unit, cylinder mounting plate, connecting plate, gravity device, the support frame is fixedly connected mounting plate, the mounting plate is fixedly connected with guide rail, gravity device is slidably connected on guide rail, gravity device can slide along guide rail under the action of its gravity;Drive unit is installed on mounting plate by cylinder mounting plate, the output end of drive unit is connected with connecting plate, gravity device includes mounting block and pressing plate, the mounting block is fixedly connected with blocking piece, the mounting block bottom is fixedly connected with pressing plate;Drive unit operably drives connecting plate to move between first position and second position;The utility model solves the problem that the existing selective welding process relies on manual pressing plate to cause low efficiency and the existing automation scheme also has the problems of high cost and poor universality.

Description

Technical Field

[0001] This utility model applies to the field of selective welding technology, and in particular relates to an automatic pressure plate device for selective welding. Background Technology

[0002] In the selective soldering process, to ensure that electronic components remain stable and adhere to the pads during soldering, and to prevent soldering defects such as cold solder joints, false solder joints, or bridging caused by component floating or shifting, some precision or specially structured components require a clamping operation before soldering. Currently, this clamping operation is still manually performed on most production lines. Operators must manually place the clamping plate in the designated position before soldering and manually remove it after soldering. This traditional manual clamping method has significant drawbacks: the manual operation steps are cumbersome, severely restricting production cycle time, resulting in low efficiency and making it difficult to meet the needs of large-scale, high-efficiency automated production in modern electronics manufacturing. Although automation is an inevitable trend in industry development, most existing selective soldering equipment does not integrate automatic clamping functionality. If automation is achieved by adding independent automated robotic arms or customizing complex pneumatic / electric clamping mechanisms, it often faces problems such as difficult equipment modification, high costs, and complex maintenance. Especially for production lines with frequent product model changes, customized devices lack versatility and flexibility, making it difficult to quickly adapt to different PCB board types and component layouts.

[0003] In order to solve the above-mentioned technical problems, this utility model designs an automatic pressure plate device for selective welding. Utility Model Content

[0004] This utility model provides an automatic pressure plate device for selective welding, aiming to solve the problems of low efficiency caused by manual pressure plate in existing selective welding processes, and high cost and poor versatility of existing automation solutions. The technical solution is as follows: An automatic pressure plate device for selective welding includes a support frame, a mounting plate, a drive unit, a cylinder mounting plate, a connecting plate, and a gravity device. The mounting plate is fixedly connected to the support frame, and a guide rail is fixedly connected to the mounting plate. The gravity device is slidably connected to the guide rail and can slide down the guide rail under its own weight. The drive unit is mounted on the mounting plate via the cylinder mounting plate, and the output end of the drive unit is connected to the connecting plate. The gravity device includes a mounting block and a pressure plate. A blocking block is fixedly connected to the mounting block, and the pressure plate is fixedly connected to the bottom of the mounting block. The drive unit operably drives the connecting plate to move between a first position and a second position; when the connecting plate is in the first position, the connecting plate blocks the blocking block, overcomes the gravity of the gravity device and keeps the gravity device in a raised state; when the connecting plate is in the second position, it releases the blocking block, and the gravity device slides down the guide rail by its own gravity, and the pressure plate performs a pressing action.

[0005] Based on the above technical solution, the drive unit is a cylinder.

[0006] Preferably, there are multiple guide rails and gravity devices, and the multiple gravity devices are independently slidably connected to the corresponding guide rails.

[0007] Preferably, the connecting plate is a long strip plate, and the length of the connecting plate is configured such that when it is in the first position, it can simultaneously block all the blocking blocks of the gravity device.

[0008] Preferably, the extension direction of the guide rail is perpendicular to the surface of the mounting plate, and the gravity device descends in a vertical direction after release.

[0009] Beneficial effects Compared with the prior art, the beneficial effects of this utility model are: 1. By controlling the gravity release device of the connecting plate through the drive unit, the traditional manual placement and removal of the pressure plate is replaced. The pressure plate action is integrated into the selective welding automation process, which significantly improves the production cycle, avoids the positional deviation and uneven force of manual operation, ensures the accuracy and reliability of each clamping, and effectively improves the welding yield. 2. Multiple clamping units are set up to achieve multi-point coordinated fixation of the PCB board. The independent sliding and synchronous movement of multiple units can adapt to the unevenness of the PCB board surface, thereby comprehensively improving the stability and reliability of clamping and ensuring the quality of soldering. Attached Figure Description

[0010] 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 one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0011] Figure 1 : A schematic diagram of the structure of this utility model; Figure 2 : A schematic diagram of the gravity device described in this utility model; Figure 3 : A schematic diagram of the structure of this utility model in use; Figure 4 Side view of the present invention in use. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and examples: The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0013] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0014] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] like Figure 1 As shown, an automatic pressure plate device for selective welding includes a support frame 1, a mounting plate 2, a drive unit 4, a cylinder mounting plate 5, a connecting plate 6, and a gravity device 7.

[0016] The support frame 1 is fixedly connected to the mounting plate 2, and the mounting plate 2 is fixedly connected to the guide rail 31. The gravity device 7 is slidably connected to the guide rail 31, and the gravity device 7 can slide down the guide rail 31 under its own weight.

[0017] The guide rail 31 extends perpendicularly to the surface of the mounting plate 2, and the gravity device 7 descends vertically after release. Gravity is a downward force. By setting the guide rail vertically, the movement direction of the gravity device 7 is aligned with the direction of gravity, allowing gravity to be converted into downward momentum. After release, the gravity device 7 falls in the most direct and efficient manner, with rapid and reliable response, avoiding potential force loss or jamming risks caused by tilted guide rails, thus improving the stability and repeatability of the device.

[0018] The drive unit 4 is mounted on the mounting plate 2 via the cylinder mounting plate 5, and the output end of the drive unit 4 is connected to the connecting plate 6. Figure 2As shown, the gravity device 7 includes a mounting block 71 and a pressure plate 73. A blocking block 72 is fixedly connected to the mounting block 71, and the pressure plate 73 is fixedly connected to the bottom of the mounting block 71. The pressure plate 73 is made of aluminum.

[0019] The drive unit 4 can operably drive the connecting plate 6 to move between a first position and a second position; the drive unit 4 is a cylinder.

[0020] The first position is the locked position. When the connecting plate 6 is in the first position, the connecting plate 6 blocks the blocking block 72, overcomes the gravity of the gravity device 7, and keeps the gravity device 7 in the raised state. The connecting plate 6 supports the blocking block 72, and pushes the entire gravity device 7, including the mounting block 71 and the bottom pressure plate 73, upward, so that it slides along the guide rail 31 to the predetermined top position.

[0021] At this position, the supporting force provided by the connecting plate 6 overcomes the gravity of the gravity device 7 itself, ensuring that the pressure plate 73 is in a lifted state away from the PCB board, providing sufficient space for the PCB board to enter, exit or be positioned.

[0022] The second position is the release position. When the connecting plate 6 is in the second position, it releases the obstruction of the blocking block 72. The gravity device 7 slides down the guide rail 31 by its own gravity, and the pressure plate 73 performs the pressing action.

[0023] When the drive unit 4 actuates, pulling or pushing the connecting plate 6 to the other end of its travel stroke, the connecting plate 6 reaches the second position. At this time, the connecting plate 6 has been completely removed from under the blocking block 72, releasing the physical obstruction to the blocking block 72. Under its own weight, the gravity device 7 immediately begins to slide smoothly down the vertically set guide rail 31. As the gravity device 7 falls, the bottom pressure plate 73 also descends, eventually pressing against the designated area of ​​the PCB board, firmly fixing it in the soldering position, providing stable support for subsequent selective soldering processes.

[0024] The connecting plate 6 is a long strip plate, and the length of the connecting plate 6 is configured such that when it is in the first position, it can simultaneously block all the blocking blocks 72 of the gravity device 7.

[0025] A single drive unit 4 drives a long strip connecting plate 6, which can simultaneously control the locking and releasing of multiple independent gravity devices 7. If each gravity device 7 is equipped with an independent drive mechanism 4, it will not only be costly and space-consuming, but also increase the complexity of the air or electrical circuits and the potential for failure.

[0026] There are multiple guide rails 31 and gravity devices 7, and the multiple gravity devices 7 are independently slidably connected to the corresponding guide rails 31.

[0027] Printed circuit boards (PCBs) are typically large in area and have uneven structures (such as openings, suspended areas, or high-density components). Single-point clamping is insufficient to ensure a flat and even fit across the entire board, easily leading to localized warping or uneven stress. By incorporating multiple gravity devices 7, pressure can be applied simultaneously at different critical locations on the PCB (such as the four corners, edges, and near large components), achieving multi-point coordinated fixation. This prevents the PCB from floating entirely or partially during the soldering process, ensuring precise contact between the soldering area and the solder head, and improving the stability of soldering quality.

[0028] Multiple gravity devices move independently, and their release is controlled by the connecting plate 6. When the connecting plate 6 moves to the release position, all the blocking blocks 72 lose their support at the same time, and each gravity device begins to fall almost simultaneously under the action of gravity.

[0029] The shape of the pressure plate 73 is such that when pressed down, it only contacts the areas on the PCB that are allowed to be pressed (such as non-component areas, reinforcing ribs, and specific pressure points), avoiding collisions or squeezing with components on the PCB (especially tall capacitors, inductors, connectors, etc.), pads, traces, or sensitive structures.

[0030] The pressure plate 73 can be a square plate. It is used to press down on large flat areas, edges, or areas with multiple regularly arranged solder joints on a PCB board.

[0031] The pressure plate 73 can also be an irregular contour plate, which is used to meet the complex clamping requirements of specific PCB layouts, such as avoiding multiple components of different heights and fitting irregular edges.

[0032] A soft material (such as a silicone pad) is fixed to the bottom surface of the pressure plate 73 (the surface in contact with the PCB board 9).

[0033] The gravity device 7 has a mounting block 71 equipped with adjustable counterweights. In electronic manufacturing production lines, it is often necessary to switch between producing different models of PCB boards. The size, thickness, component layout, and material of the PCB boards may vary, and the required clamping force will also differ. By simply adding or removing counterweights, the same pressure plate device can be quickly adapted to multiple products without replacing the entire set of equipment or making complex parameter adjustments.

[0034] It also includes a device transmission track 8, with the support frame 1 fixedly installed in the work area of ​​the transmission track 8, and the PCB board 9 moving into or out of the pressure plate work station under the drive of the transmission track 8.

[0035] The transmission track 8 is a double-sided belt or chain conveyor structure. The pressing area of ​​the pressure plate 73 is located in the middle of the transmission track 8, in the area without conveying components. This ensures that the PCB board 9 has a complete and stable support surface in the pressing area, preventing protrusions of the conveying components from affecting the contact of the pressure plate or the flatness of the PCB board. A support platform or fixture (not shown in the figure) is added to the transmission track 8 at the pressure plate station to ensure that the PCB board receives uniform support during pressing.

[0036] It also includes a positioning detection sensor, which is installed at the station of the transport track 8 to detect whether the PCB board 9 has accurately reached the pressing station. The system only triggers the pressing action after the PCB board 9's positioning signal is confirmed, preventing accidental or insufficient pressing and improving safety and process reliability. When using, such as Figure 3 and Figure 4 As shown, PCB board 9 is automatically conveyed by equipment transport track 8 and enters the pressure plate and welding station of the selective welding equipment. Transport track 8 stops running, and PCB board 9 is precisely positioned. A positioning detection sensor installed at the station detects that PCB board 9 has accurately reached the designated position and sends a signal to the main control system. After confirming that the positioning is correct, the main control system issues a command, and the drive unit 4 (such as a cylinder) actuates, pushing the connecting plate 6 from the first locked position to the second released position. After the connecting plate 6 moves away, it releases the obstruction of the blocking blocks 72 on all gravity devices 7. Multiple gravity devices 7 slide down synchronously along the vertical guide rail 31 under their own gravity. The bottom pressure plate 73 then descends, pressing against the predetermined area of ​​PCB board 9, firmly fixing PCB board 9 in place. The system confirms that the pressure plate is in place (which can be fed back by the position sensor) and activates the selective welding head to precisely weld the target components on PCB board 9.

[0037] After the welding process is completed, the main control system instructs the drive unit 4 to reverse its action, moving the connecting plate 6 from the second position back to the first locked position. The connecting plate 6 then supports all the blocking blocks 72 of the gravity device 7 again, lifting the gravity device 7 into the raised state, and the pressure plate 73 detaches from the PCB board 9. After the pressure plate 73 is fully lifted, the conveyor rail 8 starts again, transporting the welded PCB board 9 to the next station, while the next PCB board 9 enters this station, and the cycle continues.

[0038] It should be noted that the drive unit 4 and the main control system in this embodiment are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0039] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An automatic pressure plate device for selective welding, characterized in that: The system includes a support frame (1), a mounting plate (2), a drive unit (4), a cylinder mounting plate (5), a connecting plate (6), and a gravity device (7). The support frame (1) is fixedly connected to the mounting plate (2), and the mounting plate (2) is fixedly connected to the guide rail (31). The gravity device (7) is slidably connected to the guide rail (31) and can slide down the guide rail (31) under its own weight. The drive unit (4) is mounted on the mounting plate (2) through the cylinder mounting plate (5), and the output end of the drive unit (4) is connected to the connecting plate (6). The gravity device (7) includes a mounting block (71) and a pressure plate (73). A blocking block (72) is fixedly connected to the mounting block (71), and a pressure plate (73) is fixedly connected to the bottom of the mounting block (71). The drive unit (4) operably drives the connecting plate (6) to move between a first position and a second position; when the connecting plate (6) is in the first position, the connecting plate (6) blocks the blocking block (72), overcomes the gravity of the gravity device (7) and keeps the gravity device (7) in a raised state; when the connecting plate (6) is in the second position, it releases the blocking block (72), the gravity device (7) slides down the guide rail (31) by its own gravity, and the pressure plate (73) performs a pressing action.

2. The automatic pressure plate device for selective welding according to claim 1, characterized in that: The drive unit (4) is a cylinder.

3. The automatic pressure plate device for selective welding according to claim 1, characterized in that: There are multiple guide rails (31) and gravity devices (7), and the multiple gravity devices (7) are independently slidably connected to the corresponding guide rails (31).

4. The automatic pressure plate device for selective welding according to claim 1, characterized in that: The connecting plate (6) is a long strip plate, and the length of the connecting plate (6) is configured such that when it is in the first position, it can simultaneously block all the blocking blocks (72) of the gravity device (7).

5. The automatic pressure plate device for selective welding according to claim 1, characterized in that: The pressure plate (73) is made of aluminum.

6. The automatic pressure plate device for selective welding according to claim 1, characterized in that: The extension direction of the guide rail (31) is perpendicular to the surface of the mounting plate (2), and the gravity device (7) descends in the vertical direction after release.

7. The automatic pressure plate device for selective welding according to claim 1, characterized in that: The gravity device (7) is equipped with a counterweight block that can be added or removed on the mounting block (71).

8. The automatic pressure plate device for selective welding according to claim 1, characterized in that: It also includes a device transfer track (8), the support frame (1) is fixedly installed in the work area of ​​the transfer track (8), and the PCB board (9) enters or leaves the pressure plate work station under the drive of the transfer track (8).

9. The automatic pressure plate device for selective welding according to claim 8, characterized in that: It also includes a positioning detection sensor, which is set at the station of the transmission track (8) to detect whether the PCB board (9) has accurately reached the pressing station.

10. The automatic pressure plate device for selective welding according to claim 1, characterized in that: The pressure plate (73) is a square plate or an irregularly shaped plate.

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