An automatic positioning tool adapted to the circuit board welding process

Abstract

The present invention discloses an automatic positioning tool adapted to a circuit board welding process, relating to the technical field of circuit board welding, comprising a workbench, a movable groove being provided on the upper surface of the workbench, a bracket for placing the circuit board being symmetrically arranged above the workbench, and an adapting and adjusting mechanism, an auxiliary propulsion mechanism and a synchronous positioning mechanism. The adapting and adjusting mechanism and the auxiliary propulsion mechanism are both arranged between the workbench and the bracket, and the synchronous positioning mechanism is arranged on the bracket. Through the provided synchronous positioning mechanism, the position of the circuit board on the bracket can be synchronously finally positioned and clamped during the process of moving the bracket, and at the same time, the clamping action of the circuit board is made slower and more continuous and powerful, thereby avoiding the situation in which direct clamping causes impact on the surface of the circuit board, causing oscillation and damage to the electronic components on the circuit board, thereby realizing the automatic positioning function of the circuit board while also protecting the circuit board and avoiding damage to the circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board welding, and in particular to an automatic positioning tool adapted to a circuit board welding process. Background Art

[0002] A printed circuit board (PCB) is a layer of copper foil pasted on an insulating board (usually a glass fiber reinforced resin board). The unnecessary parts are removed through processes such as chemical etching to form a conductive path that can fix electronic components and connect wires. Simply put, the circuit board is the carrier of the circuit.

[0003] In the production process of circuit boards, the welding process is an indispensable link. The main purpose of the welding process is to connect electronic components together to form a complete circuit system. Through welding, the signal transmission between electronic components is more accurate and stable, thereby ensuring the normal operation of the product. When performing the welding process on the circuit board, relevant positioning tooling (fixtures) are usually used to clamp the circuit board and position the circuit board on the workbench so that the welding head can weld the circuit board. However, the existing positioning tooling often adopts a spring reset method. The staff manually opens the fixture and then puts the circuit board in and then releases the fixture to clamp the circuit board accordingly so that the circuit board can be positioned. This method is not only cumbersome in operation and increases the risk of human intervention and error, but also the effect of the elastic force will cause the tooling fixture to bounce towards the surface of the circuit board with a rapid force. The clamping speed is too fast, which will increase the impact on the circuit board, and it is easy for the electronic components on the circuit board to be damaged by the oscillation, thereby affecting the subsequent use of the circuit board.

[0004] In view of this, the present invention proposes an automatic positioning tool adapted to a circuit board welding process to remedy and improve the deficiencies of the prior art. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an automatic positioning tool adapted to the circuit board welding process to solve the corresponding technical problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: an automatic positioning tool adapted for a circuit board welding process, comprising a workbench, a movable groove being provided on the upper surface of the workbench, a bracket for placing the circuit board being symmetrically arranged above the workbench, an adapting and adjusting mechanism, an auxiliary propulsion mechanism, and a synchronous positioning mechanism, wherein the adapting and adjusting mechanism and the auxiliary propulsion mechanism are both arranged between the workbench and the bracket, and the synchronous positioning mechanism is arranged on the bracket;

[0007] The adaption adjustment mechanism is used to adjust the distance between the two brackets;

[0008] The auxiliary propulsion mechanism is used to propel the bracket toward the middle of the workbench;

[0009] The synchronous positioning mechanism is used to position and clamp the circuit board placed on the bracket.

[0010] Preferably, the adaptation and adjustment mechanism includes a rotating shaft that passes through and is rotatably connected to the workbench, a reduction motor is fixedly connected to the bottom of the rotating shaft, a rotating plate is fixedly connected to the top of the rotating shaft, a connecting plate is symmetrically rotatably connected to the rotating plate, and the connecting plate is rotatably connected to a fixed plate at one end away from the rotating plate, and the fixed plate is arranged under the bracket.

[0011] Preferably, the bottom of the bracket is fixedly connected to a Z-shaped bending frame, the bottom of the Z-shaped bending frame is fixedly connected to a slide bar, the top of the fixed plate is provided with a slide groove adapted to the slide bar, and the slide bar is slidably connected in the slide groove.

[0012] Preferably, the bracket is provided with air holes at equal intervals, the bracket is further fixedly connected to a gravity sensing plate, and the air holes extend to the gravity sensing plate.

[0013] Preferably, the auxiliary propulsion mechanism includes a connecting frame fixedly connected to the opposite side of the fixed plate, and the connecting frame is slidably connected to the movable groove, a tooth plate is fixedly connected to the bottom of the bracket, a mounting plate is fixedly connected to the connecting frame, and the mounting plates are rotatably connected to the opposite sides of the mounting plates, a gear is fixedly connected to the outer surface of the central shaft coaxially, and the gear is meshingly connected to the tooth plate.

[0014] Preferably, one of the central axes is coaxially fixedly connected to an inner rod on one side away from the adjacent mounting plate, and the other central axis is coaxially fixedly connected to a sleeve on one side away from the adjacent mounting plate. The inner annular surface of the sleeve is annularly and equidistantly provided with limiting grooves, and the outer annular surface of the inner rod is annularly and equidistantly fixedly connected to limiting blocks, and the limiting blocks are slidably connected in the limiting grooves.

[0015] Preferably, the synchronous positioning mechanism includes an extension rod fixedly connected to the opposite side of the bracket, the outer surface of the extension rod is rotatably connected to a linkage plate, the end of the linkage plate away from the extension rod is rotatably connected to a T-shaped connecting rod, the side of the T-shaped connecting rod away from the extension rod is fixedly connected to a follower block, the follower block is symmetrically rotatably connected to a first connecting shaft, the side of the follower block away from the T-shaped connecting rod is fixedly connected to a telescopic rod, the end of the telescopic rod away from the follower block is slidably connected to an L-shaped limit frame, and the L-shaped limit frame is fixedly connected to the fixed plate.

[0016] Preferably, the outer surfaces of the ends facing each other between the first connecting shafts are rotatably connected to an inverted J-shaped plate, the end of the inverted J-shaped plate away from the first connecting shaft is rotatably connected to a third connecting shaft, the end of the third connecting shaft away from the inverted J-shaped plate is rotatably connected to a fixed block, and the fixed block is fixedly connected to the bottom of the fixed plate.

[0017] Preferably, the inverted J-shaped plate is also rotatably connected to a second connecting shaft, and the second connecting shaft is located between the first connecting shaft and the third connecting shaft, a pressure frame is rotatably connected between the second connecting shafts, and the pressure frame is fixedly connected to the follower block, and a rubber pressure plate is fixedly connected to the bottom of the pressure frame, and the rubber pressure plate is arranged above the bracket.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The adaptable adjustment mechanism is provided to adjust the distance between the two brackets accordingly to adapt to the placed circuit board, thereby adapting to circuit boards of different sizes and specifications, thereby enhancing the adaptability and flexibility of the structure. In addition, the auxiliary propulsion mechanism can be used to propel the bracket toward the middle of the workbench while the circuit board is placed on the bracket. Different from the existing method of adjusting the spacing separately, the distance between the two brackets can be kept consistent, so that the two brackets always correspond to the center of the workbench, and the center of the circuit board is aligned with the center of the workbench, so as to facilitate the subsequent welding process of the circuit board, thereby improving the welding accuracy of the circuit board, simplifying the operation process, reducing the need for manual intervention, and improving work efficiency.

[0020] (2) Through the synchronous positioning mechanism, the position of the circuit board on the bracket can be finally positioned and clamped synchronously during the process of moving the bracket, so that the circuit board can be placed more stably on the workbench for subsequent welding processes. Different from the existing clamping and positioning method of the circuit board by manual direct operation of the clamp by the staff, the clamp does not need to be directly used by the staff, which reduces human intervention and errors, improves the degree of automation of the device, and makes the clamping action of the circuit board slower and more continuous and powerful, avoiding the direct clamping causing impact on the surface of the circuit board and causing oscillation and damage to the electronic components on the circuit board. In this way, while realizing the automatic positioning function of the circuit board, the circuit board is also protected to avoid damage to the circuit board.

[0021] (3) Through the air holes opened, after the circuit board is placed on the upper surface of the gravity sensing plate, the bottom of the circuit board and the gravity sensing plate can be in contact with the outside air through the air holes. In the process of positioning and clamping the circuit board using the auxiliary propulsion mechanism, the pressure generated during the downward pressing process can be released, reducing the stress concentration caused by the clamping pressure on the local part of the circuit board, thereby avoiding the occurrence of gas bulging that affects the positioning and clamping effect of the circuit board, resulting in uneven and unstable positioning and clamping of the circuit board, and effectively reducing the probability of damage to the circuit board;

[0022] (4) In the process of positioning and clamping the circuit board using the auxiliary propulsion mechanism, the Z-shaped bending frame arranged to slide longitudinally between the bracket and the fixed plate can realize the connection between the bracket and the fixed plate, so as to facilitate driving the fixed plate to drive the bracket to adjust the spacing, and drive the bracket to move alone on the fixed plate. Moreover, according to its shape characteristics, it can also reduce the exhaust obstruction of the air hole, so that the air hole can facilitate the discharge of excess gas generated when clamping the circuit board, and at the same time maintain a good connection relationship with the bracket for easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0024] Figure 2 The present invention shows Figure 1 A in the middle is an enlarged structural diagram;

[0025] Figure 3 This is a schematic diagram of the structure of the rotating plate connection shown in the present invention;

[0026] Figure 4 The present invention shows Figure 3 The enlarged structural diagram at B in the middle;

[0027] Figure 5 This is a schematic diagram of the disassembled structure of the bracket, Z-shaped bending frame and fixed plate shown in the present invention;

[0028] Figure 6 This is a schematic diagram of the bracket connection structure shown in the present invention;

[0029] Figure 7 The present invention shows Figure 6 The enlarged structural diagram at C in the middle;

[0030] Figure 8 This is a schematic diagram of the structure of the inverted J-shaped plate connection shown in the present invention;

[0031] Figure 9 This is a schematic structural diagram of the press frame connection shown in the present invention.

[0032] The numbers in the figure are:

[0033] 1. Workbench; 2. Moving slot; 3. Bracket;

[0034] 4. Adaptation and adjustment mechanism; 401. Reducer motor; 402. Rotating shaft; 403. Rotating plate; 404. Connecting plate; 405. Fixed plate; 406. Slide; 407. Z-shaped bending frame; 408. Slide bar; 409. Gravity sensor plate; 410. Air hole;

[0035] 5. Auxiliary propulsion mechanism; 501. Connecting frame; 502. Mounting plate; 503. Central shaft; 504. Gear; 505. Tooth plate; 506. Sleeve; 507. Limiting groove; 508. Inner rod; 509. Limiting block;

[0036] 6. Synchronous positioning mechanism; 601. Extension rod; 602. Linkage plate; 603. T-shaped connecting rod; 604. Follower block; 605. First connecting shaft; 606. Inverted J-shaped plate; 607. Second connecting shaft; 608. Third connecting shaft; 609. Fixed block; 610. Press frame; 611. Rubber pressure plate; 612. Telescopic rod; 613. L-shaped limit frame. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0038] Embodiments of the present invention:

[0039] Please refer to Figures 1 to 9 As shown, an automatic positioning tool adapted for a circuit board welding process includes a workbench 1, a movable groove 2 is provided on the upper surface of the workbench 1, and a bracket 3 for placing the circuit board is symmetrically arranged above the workbench 1. The tool also includes: an adaptive adjustment mechanism 4, an auxiliary propulsion mechanism 5, and a synchronous positioning mechanism 6. The adaptive adjustment mechanism 4 and the auxiliary propulsion mechanism 5 are both arranged between the workbench 1 and the bracket 3, and the synchronous positioning mechanism 6 is arranged on the bracket 3.

[0040] The adaption adjustment mechanism 4 is used to adjust the distance between the two brackets 3;

[0041] The auxiliary propulsion mechanism 5 is used to propel the bracket 3 toward the middle of the workbench 1;

[0042] The synchronous positioning mechanism 6 is used to position and clamp the circuit board placed on the bracket 3;

[0043] The adapting and adjusting mechanism 4 includes a rotating shaft 402 that is rotatably connected to the workbench 1. The bottom of the rotating shaft 402 is fixedly connected to the reduction motor 401. The top of the rotating shaft 402 is fixedly connected to the rotating plate 403. The rotating plate 403 is symmetrically rotatably connected to a connecting plate 404. The end of the connecting plate 404 away from the rotating plate 403 is rotatably connected to a fixed plate 405, and the fixed plate 405 is arranged below the bracket 3.

[0044] The bottom of the bracket 3 is fixedly connected to a Z-shaped bending frame 407, the bottom of the Z-shaped bending frame 407 is fixedly connected to a slide bar 408, the top of the fixed plate 405 is provided with a slide groove 406 adapted to the slide bar 408, and the slide bar 408 is slidably connected in the slide groove 406;

[0045] The bracket 3 is provided with air holes 410 at equal intervals. The bracket 3 is also fixedly connected to a gravity sensing plate 409, and the air holes 410 extend to the gravity sensing plate 409.

[0046] The auxiliary propulsion mechanism 5 includes a connecting frame 501 fixedly connected to the opposite side of the fixed plate 405, and the connecting frame 501 is slidably connected to the movable groove 2. A tooth plate 505 is fixedly connected to the bottom of the bracket 3. A mounting plate 502 is fixedly connected to the connecting frame 501. The mounting plates 502 are rotatably connected to the opposite sides of the mounting plates 502. A gear 504 is fixedly connected to the outer surface of the central shaft 503 coaxially, and the gear 504 is meshed with the tooth plate 505.

[0047] An inner rod 508 is coaxially fixedly connected to one side of the central axis 503 away from the adjacent mounting plate 502, and a sleeve 506 is coaxially fixedly connected to the other side of the central axis 503 away from the adjacent mounting plate 502. The inner annular surface of the sleeve 506 is annularly and equidistantly provided with limiting grooves 507. The outer annular surface of the inner rod 508 is annularly and equidistantly fixedly connected to limiting blocks 509, and the limiting blocks 509 are slidably connected to the limiting grooves 507.

[0048] The effects achieved by this embodiment are as follows: by providing the adapting and adjusting mechanism 4, the distance between the two brackets 3 can be adjusted accordingly to adapt to the placed circuit board, thereby adapting to circuit boards of different sizes and specifications, thereby enhancing the adaptability and flexibility of the structure, and in combination with the auxiliary propulsion mechanism 5, the bracket 3 can be pushed toward the middle of the workbench 1 while the circuit board is placed on the bracket 3. Different from the existing method of adjusting the spacing separately, the adjustment distance between the two brackets 3 can be kept consistent, so that the two brackets 3 always correspond to the center of the workbench 1, and the center of the circuit board is aligned with the center of the workbench 1, so as to facilitate the subsequent soldering process of the circuit board, thereby improving the soldering accuracy of the circuit board, simplifying the operation process, reducing the need for manual intervention, and improving work efficiency;

[0049] Furthermore, the air holes 410 allow the bottom of the circuit board and the gravity sensing plate 409 to be exposed to the outside air through the air holes 410 after the circuit board is placed on the upper surface of the gravity sensing plate 409. During the positioning and clamping of the circuit board by the auxiliary propulsion mechanism 5, the pressure generated during the downward pressing process can be released, thereby reducing the stress concentration locally on the circuit board caused by the clamping pressure. This prevents the occurrence of air bulging that affects the positioning and clamping effect of the circuit board, resulting in uneven and unstable positioning and clamping of the circuit board, and effectively reduces the probability of damage to the circuit board.

[0050] At the same time, in the process of using the auxiliary propulsion mechanism 5 to position and clamp the circuit board, the Z-shaped bending frame 407 that is longitudinally slidable between the bracket 3 and the fixed plate 405 can realize the connection between the bracket 3 and the fixed plate 405, so as to drive the fixed plate 405 to drive the bracket 3 to adjust the spacing, and drive the bracket 3 to move alone on the fixed plate 405. Moreover, according to its shape characteristics, it can also reduce the exhaust obstruction of the air hole 410, so that the air hole 410 can easily discharge the excess gas generated when clamping the circuit board, and at the same time maintain a good connection relationship with the bracket 3 for easy use.

[0051] Further examples:

[0052] Please refer to Figures 1 to 9 As shown, the synchronous positioning mechanism 6 includes an extension rod 601 fixedly connected to the opposite side of the bracket 3, the outer surface of the extension rod 601 is rotatably connected to a linkage plate 602, the end of the linkage plate 602 away from the extension rod 601 is rotatably connected to a T-shaped connecting rod 603, the side of the T-shaped connecting rod 603 away from the extension rod 601 is fixedly connected to a follower block 604, the follower block 604 is symmetrically rotatably connected to a first connecting shaft 605, the follower block 604 is fixedly connected to the side away from the T-shaped connecting rod 603, the end of the telescopic rod 612 away from the follower block 604 is slidably connected to an L-shaped limit frame 613, and the L-shaped limit frame 613 is fixedly connected to the fixed plate 405;

[0053] The outer surfaces of the ends facing each other between the first connecting shafts 605 are rotatably connected to an inverted J-shaped plate 606. The ends of the inverted J-shaped plates 606 away from the first connecting shaft 605 are rotatably connected to a third connecting shaft 608. The ends of the third connecting shaft 608 away from the inverted J-shaped plates 606 are rotatably connected to a fixed block 609. The fixed block 609 is fixedly connected to the bottom of the fixed plate 405.

[0054] The inverted J-shaped plate 606 is further rotatably connected to a second connecting shaft 607, and the second connecting shaft 607 is located between the first connecting shaft 605 and the third connecting shaft 608. A pressure frame 610 is rotatably connected between the second connecting shaft 607, and the pressure frame 610 is fixedly connected to the follower block 604. A rubber pressure plate 611 is fixedly connected to the bottom of the pressure frame 610, and the rubber pressure plate 611 is arranged above the bracket 3.

[0055] The effects achieved by this embodiment are as follows: through the provision of a synchronous positioning mechanism 6, the position of the circuit board on the bracket 3 can be finally positioned and clamped synchronously during the process of moving the bracket 3, so that the circuit board can be placed more stably on the workbench 1 for subsequent welding processes. Different from the existing method of clamping and positioning the circuit board by manual direct operation of the clamp by the staff, it is possible to eliminate the need for the staff to directly use the clamp, reduce human intervention and errors, improve the degree of automation of the device, and make the clamping action of the circuit board slower and more continuous and powerful, avoiding direct clamping causing impact on the surface of the circuit board and causing oscillation and damage to the electronic components on the circuit board. Thus, while realizing the automatic positioning function of the circuit board, it also realizes protection of the circuit board and avoids damage to the circuit board.

[0056] The complete usage steps and working principle of the above embodiment are as follows:

[0057] In the initial state: the two brackets 3 are arranged above the front side of the workbench 1 but not above the middle part of the workbench 1. An external welding part is fixedly arranged above the rear side of the workbench 1, and the welding part structure can be a frame structure for support and a welding head. The welding head is electrically connected to the external drive source, and the welding head is directly above the middle part of the workbench 1. When processing the circuit board, the welding head can be used to perform the welding process on the circuit board. It should be noted that the above are all existing technologies and will not be elaborated on here.

[0058] The following is a working process of adjusting the distance between the two brackets 3 by the adaptive adjustment mechanism 4 and simultaneously placing the circuit board on the bracket 3 using the auxiliary propulsion mechanism 5 to propel the bracket 3 toward the middle of the workbench 1:

[0059] When the circuit board is being soldered, the staff can first take the circuit board to be soldered and adjust the distance between the two brackets 3 accordingly according to the size of the circuit board to adapt to the size of the circuit board. When adjusting the distance between the two brackets 3, if the distance between the two brackets 3 is larger than the size of the circuit board (that is, both ends of the circuit board cannot be placed on the two brackets 3), as shown in FIG. Figure 3As shown, the staff can first turn on the reduction motor 401, so that the output end of the reduction motor 401 drives the shaft 402 to rotate synchronously on the workbench 1. Since the top of the shaft 402 is fixedly connected to the rotating plate 403, when the reduction motor 401 drives the shaft 402 to rotate, the rotating plate 403 rotates synchronously above the workbench 1, as shown in FIG. Figure 3 and Figure 5 As shown, because the rotating plate 403 is symmetrically connected to the connecting plate 404 for rotation, and the connecting plate 404 is rotatably connected to the fixed plate 405, and the fixed plate 405 is arranged below the bracket 3, and is slidably connected to the fixed plate 405 through the Z-shaped bending frame 407 installed at the bottom of the bracket 3, and the sliding direction is staggered with the moving direction of the bracket 3 when adjusting the spacing (that is, the two brackets 3 move horizontally when adjusting the spacing, and the moving direction between the bracket 3 and the fixed plate 405 is longitudinal movement), so when the rotating plate 403 rotates, the two brackets 3 can be moved toward the middle direction of the workbench 1 through the connecting plate 404, thereby reducing the distance between the two brackets 3, so that this spacing gradually becomes aligned with the linear The circuit board size corresponds to that of the circuit board. When the spacing is reduced, the staff can place the circuit board between the two brackets 3 so that both sides of the circuit board are placed on the brackets 3, that is, placed on the upper surface of the gravity sensing plate 409, thereby achieving adaptive adjustment of the placement of the circuit board. By setting the adaptive adjustment mechanism 4, the reduction motor 401 is used to drive the two brackets 3 to move synchronously toward each other, so that the adjustment distance of the two brackets 3 can be consistent. Different from the single adjustment method, the two brackets 3 can always correspond longitudinally to the center of the workbench 1, and the center of the circuit board is longitudinally aligned with the center of the workbench 1, so as to facilitate the subsequent welding process of the circuit board, thereby improving the welding accuracy of the circuit board.

[0060] It should be noted that if Figure 2 and Figure 3 as well as Figure 5 As shown, an external driving source (driving motor) is fixedly connected to one of the mounting plates 502, and the driving motor is electrically connected to the gravity sensing plate 409 in the adapting and adjusting mechanism 4. That is, after the circuit board is placed and the gravity sensing plate 409 senses the presence of the circuit board, a signal feedback can be transmitted to the external controller, which controls the start of the driving motor. The output end of the driving motor passes through this mounting plate 502 and is fixedly connected to the central shaft 503. Since the central shaft 503 is fixedly connected to the gear 504 coaxially, when the driving motor is started, the central shaft 503 can be synchronously driven to rotate on the mounting plate 502, and the gear 504 can be driven to rotate synchronously. The specific working principle is shown below;

[0061] Combined with the above contents, such as Figures 3 to 5After the staff has adjusted the distance between the two brackets 3 according to the size of the circuit board, the circuit board can be placed on the two brackets 3. At this time, the gravity sensing plate 409 on the bracket 3 will sense the presence of the circuit board, thereby triggering and starting the drive motor to start running, driving one of the central shafts 503 to rotate. Since the outer surface of the central shaft 503 is fixed with a gear 504, and the opposite sides of the central shaft 503 are respectively fixed with a sleeve 506 and an inner rod 508, there are multiple rings on the inner ring surface of the sleeve 506. The inner rod 508 has a limiting groove 507, and a limiting block 509 is fixed on the outer surface of the inner rod 508 to be slidably connected with the limiting groove 507. Therefore, when the central shaft 503 rotates to drive the gear 504 to rotate synchronously, the sleeve 506 will drive the limiting block 509 to change synchronously through the design of the limiting groove 507, thereby driving the inner rod 508 to rotate synchronously with the rotation of the sleeve 506. At this time, the other central shaft 503 can be driven to rotate synchronously on the mounting plate 502, so that both gears 504 can rotate. Figure 5 As shown, since the Z-shaped bending frame 407 and the tooth plate 505 are fixed to the bottom of the bracket 3, and the Z-shaped bending frame 407 is slidably connected to the fixed plate 405 through the slide bar 408 and the slide groove 406, and the tooth plate 505 is meshed with the gear 504, when the gear 504 rotates, the meshing between the teeth can drive the tooth plate 505 to synchronously follow and move to a corresponding position above the workbench 1. At this time, since the longitudinal orientation of the fixed plate 405 remains unchanged, the bracket 3 will slide on the upper surface of the fixed plate 405 toward the rear side of the workbench 1 under the connection of the Z-shaped bending frame 407, and deliver the circuit board to the top of the middle of the workbench 1, and finally align the center of the circuit board with the center of the workbench 1, so as to facilitate the subsequent welding process of the circuit board, thereby improving the welding accuracy of the circuit board.

[0062] And as Figure 3 and Figure 4 As shown, the inner rod 508 is connected to the sleeve 506 by a horizontal sliding connection through a limit block 509 and a limit groove 507. When the central shaft 503 rotates, the inner rod 508 and the sleeve 506 are limited by the horizontal sliding direction and can rotate synchronously with the central shaft 503. When the adaptive adjustment mechanism 4 adjusts the distance between the two brackets 3, since the bracket 3 slides longitudinally on the fixed plate 405 through the Z-shaped bending frame 407, it is limited by the longitudinal sliding direction between the slide bar 408 and the slide groove 406. , which can make the fixed plate 405 drive the brackets 3 to move toward each other synchronously, and because the fixed plate 405 is fixedly connected to the connecting frame 501, the moving groove 2 is horizontally provided on the workbench 1, and the connecting frame 501 and the moving groove 2 are slidably connected, when the fixed plate 405 is driven to move toward each other, the connecting frame 501 synchronously slides horizontally inside the moving groove 2, thereby assisting the fixed plate 405 to move, moving the two brackets 3 smoothly, and enabling the brackets 3 to move along the set route for subsequent use;

[0063] Please refer to the above working process Figures 1 to 9 .

[0064] The following is a working process of the auxiliary propulsion mechanism 5 using the synchronous positioning mechanism 6 to position and clamp the circuit board placed on the bracket 3 during the process of moving the bracket 3:

[0065] like Figure 8 and Figure 9 As shown, in the process of the gear 504 rotating to drive the gear plate 505 to move longitudinally, since the bracket 3 is connected to the linkage plate 602 through the extension rod 601, the other end of the linkage plate 602 is connected to the T-shaped connecting rod 603, and the T-shaped connecting rod 603 is fixed to the follower block 604, the movement of the bracket 3 can drive the extension rod 601 to move synchronously, so that under the connection action of the linkage plate 602, the T-shaped connecting rod 603 can be pulled to move synchronously, and at this time, the position of the follower block 604 changes synchronously. Since the follower block 604 is fixed with a telescopic rod 612 at one end away from the T-shaped connecting rod 603, and the telescopic rod 612 slides on the L-shaped limit frame 613, and the L-shaped limit frame 613 is fixed on the fixed plate 405, the follower block 604 will drive the telescopic rod 612 to stretch while sliding downward on the L-shaped limit frame 613, as shown in FIG. Figure 9 As shown, since a pressing frame 610 is fixed on the follower block 604, and the pressing frame 610 is arranged above the bracket 3 (that is, the pressing frame 610 will be located above the end of the circuit board after the circuit board is placed), when the follower block 604 moves, the pressing frame 610 changes with the movement and will press toward the surface of the circuit board in a rotating downward manner. Since a rubber pressing plate 611 is fixed to the bottom of the pressing frame 610, the rubber pressing plate 611 will preferentially contact the surface of the circuit board. Driven by the pressing frame 610, the rubber pressing plate 611 can be driven to finally press against the circuit board, and the position of the circuit board on the bracket 3 is finally positioned and clamped, so that The circuit board can be placed more stably on the workbench 1 for subsequent welding processes. Different from the existing clamping and positioning method of the circuit board by manual direct operation of the clamp by the staff, the clamp can be directly used by the staff without the need for direct use of the clamp, thereby reducing human intervention and errors, improving the degree of automation of the device, making the clamping action of the circuit board slower and more continuous and powerful, and avoiding the situation where direct clamping causes impact on the surface of the circuit board and causes vibration and damage to the electronic components on the circuit board. In this way, while realizing the automatic positioning function of the circuit board, it also protects the circuit board and avoids damage to the circuit board.

[0066] like Figure 8As shown, since the pressing frame 610 is mounted on the inverted J-shaped plate 606 via the second connecting shaft 607, and the inverted J-shaped plate 606 is connected to the follower block 604 via the first connecting shaft 605, and the inverted J-shaped plate 606 is connected to the fixed block 609 at the bottom of the fixed plate 405 via the third connecting shaft 608, the design of the inverted J-shaped plate 606 enables the pressing frame 610 to more stably rotate and press down to position and clamp the circuit board on the bracket 3, thereby facilitating subsequent circuit board welding operations;

[0067] Since the air holes 410 are evenly spaced through the bracket 3 and extend to the gravity sensing plate 409, the air holes 410 allow the bottom of the circuit board and the gravity sensing plate 409 to be in contact with the outside air through the air holes 410 after the circuit board is placed on the upper surface of the gravity sensing plate 409. When the auxiliary propulsion mechanism 5 is used to position and clamp the circuit board, the pressure generated during the downward pressing process can be released, reducing the stress concentration caused by the clamping pressure on the circuit board. This prevents the occurrence of air bulging that affects the positioning and clamping effect of the circuit board, resulting in uneven and unstable positioning and clamping of the circuit board, and effectively reduces the probability of damage to the circuit board.

[0068] In the process of positioning and clamping the circuit board using the auxiliary propulsion mechanism 5, the Z-shaped bending frame 407 is longitudinally slidably arranged between the bracket 3 and the fixed plate 405. This can not only realize the connection between the bracket 3 and the fixed plate 405, so as to facilitate driving the fixed plate 405 to drive the bracket 3 to adjust the spacing, and drive the bracket 3 to move independently on the fixed plate 405, but also reduce the obstruction of the air hole 410 due to its shape characteristics, so that the air hole 410 can easily discharge the excess gas generated when clamping the circuit board, while also maintaining a good connection with the bracket 3 for subsequent use.

[0069] Please refer to the above working process Figures 1 to 9 .

[0070] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0071] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic positioning tool adapted for a circuit board welding process, comprising a workbench (1), a movable groove (2) being provided on the upper surface of the workbench (1), and a bracket (3) for placing the circuit board being symmetrically arranged above the workbench (1), characterized in that: The automatic positioning tool adapted for a circuit board welding process comprises: an adapting and adjusting mechanism (4), an auxiliary propulsion mechanism (5), and a synchronous positioning mechanism (6); the adapting and adjusting mechanism (4) and the auxiliary propulsion mechanism (5) are both arranged between a workbench (1) and a bracket (3); and the synchronous positioning mechanism (6) is arranged on the bracket (3); The adaption adjustment mechanism (4) is used to adjust the distance between the two brackets (3); The auxiliary propulsion mechanism (5) is used to propel the bracket (3) toward the middle of the workbench (1); The synchronous positioning mechanism (6) is used to position and clamp the circuit board placed on the bracket (3); The adapting and adjusting mechanism (4) includes a rotating shaft (402) that is rotatably connected to the workbench (1), a reduction motor (401) being fixedly connected to the bottom of the rotating shaft (402), a rotating plate (403) being fixedly connected to the top of the rotating shaft (402), a connecting plate (404) being symmetrically rotatably connected to the rotating plate (403), an end of the connecting plate (404) away from the rotating plate (403) being rotatably connected to a fixed plate (405), and the fixed plate (405) being arranged below the bracket (3); The bottom of the bracket (3) is fixedly connected to a Z-shaped bending frame (407), the bottom of the Z-shaped bending frame (407) is fixedly connected to a slide bar (408), the top of the fixed plate (405) is provided with a slide groove (406) adapted to the slide bar (408), and the slide bar (408) is slidably connected in the slide groove (406); The auxiliary propulsion mechanism (5) includes a connecting frame (501) fixedly connected to the opposite side of the fixed plate (405), and the connecting frame (501) is slidably connected to the movable groove (2), the bottom of the bracket (3) is fixedly connected to a tooth plate (505), the connecting frame (501) is fixedly connected to a mounting plate (502), and the mounting plates (502) are rotatably connected to the opposite sides of the mounting plates (502), the outer surface of the central shaft (503) is fixedly connected to the same axis, and the gear (504) is meshed with the tooth plate (505); One of the central shafts (503) is coaxially fixedly connected to an inner rod (508) on a side away from the adjacent mounting plate (502), and the other central shaft (503) is coaxially fixedly connected to a sleeve (506) on a side away from the adjacent mounting plate (502). The inner annular surface of the sleeve (506) is provided with annular limiting grooves (507) at equal intervals. The outer annular surface of the inner rod (508) is annularly fixedly connected to a limiting block (509) at equal intervals, and the limiting block (509) is slidably connected in the limiting groove (507). The synchronous positioning mechanism (6) includes an extension rod (601) fixedly connected to the opposite side of the bracket (3); the outer surface of the extension rod (601) is rotatably connected to a linkage plate (602); one end of the linkage plate (602) away from the extension rod (601) is rotatably connected to a T-shaped connecting rod (603); the side of the T-shaped connecting rod (603) away from the extension rod (601) is fixedly connected to a follower block (604); a first connecting shaft (605) is symmetrically rotatably connected to the follower block (604); the side of the follower block (604) away from the T-shaped connecting rod (603) is fixedly connected to a telescopic rod (612); the end of the telescopic rod (612) away from the follower block (604) is slidably connected to an L-shaped limiting frame (613), and the L-shaped limiting frame (613) is fixedly connected to the fixed plate (405); The outer surfaces of the ends facing each other between the first connecting shafts (605) are rotatably connected to an inverted J-shaped plate (606), the end of the inverted J-shaped plate (606) away from the first connecting shaft (605) is rotatably connected to a third connecting shaft (608), the end of the third connecting shaft (608) away from the inverted J-shaped plate (606) is rotatably connected to a fixed block (609), and the fixed block (609) is fixedly connected to the bottom of the fixed plate (405); The inverted J-shaped plate (606) is also rotatably connected to a second connecting shaft (607), and the second connecting shaft (607) is located between the first connecting shaft (605) and the third connecting shaft (608). A pressure frame (610) is rotatably connected between the second connecting shaft (607), and the pressure frame (610) is fixedly connected to the follower block (604). A rubber pressure plate (611) is fixedly connected to the bottom of the pressure frame (610), and the rubber pressure plate (611) is arranged above the bracket (3); The bracket (3) is provided with air holes (410) at equal intervals. A gravity sensing plate (409) is also fixedly connected to the bracket (3), and the air holes (410) extend to the gravity sensing plate (409).

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