A PCB board welding pad precision adjustment device

Abstract

The present invention provides a device for adjusting the precision of a PCB welding pad, comprising a device housing and a connecting beam, wherein the inner surface of the device housing is fixedly connected to the connecting beam, the bottom surface of the device housing is fixedly connected to the device base, a welding gun is mounted on the inner surface of the connecting beam, the bottom surface of the device housing is provided with a clamping and positioning mechanism, the inner surface of the connecting beam is provided with a lateral adjustment mechanism, the outer surface of the welding gun is provided with a longitudinal adjustment mechanism, and the inner surface of the connecting beam is provided with a pressure adjustment mechanism. The lateral adjustment mechanism can move laterally and limit the lateral movement to achieve longitudinal control, the longitudinal adjustment mechanism can move longitudinally and limit the longitudinal movement to achieve lateral control, the pressure adjustment mechanism can adjust the welding pressure of the welding gun, and appropriate pressure application can ensure welding quality and ensure that the welding pad applies uniform pressure to the welding area to ensure a good welding connection.

Description

Technical Field

[0001] The present invention relates to the technical field related to printed circuits, and in particular to a device for adjusting the precision of a soldering pad on a PCB. Background Art

[0002] Printed circuit boards are a key electronic component widely used in various electronic devices. They are flat boards that support and connect electronic components. They contain conductive paths, connection points, and solder joints for transmitting electronic signals and power. The main function of PCBs is to provide mechanical support and electrical connections for electronic components. They are usually made of insulating materials such as glass fiber reinforced epoxy resin (FR-4) and coated with conductive copper layers on the surface. These copper layers form circuits and are manufactured through printing, etching, and other processing techniques. The advantages of PCBs are their highly reliable circuit connections, compact design, ease of manufacturing and assembly, and support for miniaturization and automated production of electronic devices. They are suitable for various applications, including consumer electronics, communications equipment, medical instruments, industrial control, and aerospace. During use, PCBs usually have small components and pads on them, which require high-precision soldering. Poor control of solder displacement can lead to cold solder joints and short circuits, which may cause circuit failures. Proper soldering pressure ensures that the solder joints are evenly in contact with the pads and components, providing good solder joint connections. This is the key to ensure circuit reliability and stability. Poor control of welding pressure. Too high or too low welding pressure may cause cold joints and short circuits, thereby affecting the quality of solder joint connections. Incorrect welding pressure may cause uneven distribution of solder joints. Some solder joints may be excessive or insufficient, which may reduce the reliability of solder joint connections.

[0003] However, in the existing PCB board welding pad equipment, most of the PCB board welding pad equipment is used. After searching the patent number CN201810608161.7 BGA welding pad welding machine and BGA welding pad welding method, it is described in the article that "a driving device is used to drive the electric spark welding head to move toward the direction close to the installation position. At this time, the BGA welding pad and the welding material can be welded together by the electric spark welding head. Finally, the driving device is used to drive the electric spark welding head to move away from the installation position." The welding head can move, but the pressure control is not good. Appropriate welding pressure ensures the use of an appropriate amount of solder to avoid excessive waste, thereby saving costs. High welding pressure may cause damage to components, especially for surface mount components. If the displacement control is not good, it may lead to a decline in solder joint quality, uneven solder joints or cold solder joints, which may reduce the reliability of the solder joints. Summary of the Invention

[0004] The present invention aims to provide a device for adjusting the precision of solder pads on a PCB board to solve the problems of the existing PCB solder pad devices proposed in the above-mentioned background art. During use, there are usually small components and solder pads on the PCB board, which require high-precision soldering. Poor control of solder displacement may result in cold solder joints and short circuits, which may cause circuit failure. The proper soldering pressure ensures that the solder joints are in uniform contact with the solder pads and components, providing good solder joint connections. This is the key to ensuring the reliability and stability of the circuit. Poor control of soldering pressure (excessive or low soldering pressure) may result in cold solder joints and short circuits, thereby affecting the quality of the solder joint connection. Incorrect soldering pressure may result in uneven distribution of solder joints, with some solder joints having excessive or insufficient solder joints, which may reduce the reliability of the solder joint connection.

[0005] To achieve the above-mentioned objectives, the present invention provides a PCB board welding pad precision adjustment device, comprising a device housing and a connecting beam, the inner surface of the device housing being fixedly connected to the connecting beam, the bottom surface of the device housing being fixedly connected to the device base, the inner surface of the connecting beam being mounted with a welding gun, the bottom surface of the device housing being provided with a clamping and positioning mechanism, the inner surface of the connecting beam being provided with a lateral adjustment mechanism, the outer surface of the welding gun being provided with a longitudinal adjustment mechanism, and the inner surface of the connecting beam being provided with a pressure adjustment mechanism.

[0006] Preferably, the number of the device housings is two and they are symmetrically distributed, both ends of the connecting beam are fixedly connected to the device housings, and the connecting beam is made of stainless steel.

[0007] Preferably, the clamping and positioning mechanism includes a fixed block, a mounting rod, a tension spring, a clamping plate and a placement base. The bottom surface of the device housing is fixedly connected to the fixed block, the inner surface of the fixed block is fixedly connected to the mounting rod, the outer surface of the mounting rod is sleeved with a tension spring, the outer surface of the mounting rod is slidably connected to the clamping plate, and the inner surface of the clamping plate is slidably connected to the placement base.

[0008] Preferably, a fixed block is fixedly connected to the bottom surface of the connecting beam, the mounting rod passes through the fixed block and is fixedly connected to the fixed block, one end of the tension spring is fixedly connected to the fixed block, and the other end of the tension spring is fixedly connected to the clamping plate, and the number of the clamping plates is two and they are symmetrically distributed.

[0009] Preferably, the lateral adjustment mechanism includes a sliding groove, a sliding plate, a magnetic clamp, a mounting shaft and a locking block. The inner surface of the connecting beam is provided with a sliding groove, the inner surface of the sliding groove is slidably connected to the sliding plate, the outer surface of the connecting beam is slidably connected to the magnetic clamp, the top surface of the magnetic clamp is fixedly connected to the mounting shaft, and the outer surface of the mounting shaft is rotatably connected to the locking block.

[0010] Preferably, the number of the sliding plates is two and they are symmetrically distributed, and the locking block is slidably connected to the sliding plates.

[0011] Preferably, the longitudinal adjustment mechanism includes a mounting cylinder, a sliding cylinder, a connecting block, a threaded column, a clamping disk and a clamping knob. The outer surface of the welding gun is snap-connected with the mounting cylinder, the bottom surface of the mounting cylinder is fixedly connected with the sliding cylinder, the outer surface of the sliding cylinder is fixedly connected with the connecting block, the inner surface of the connecting block is threadedly connected with a threaded column, one end of the threaded column is fixedly connected with the clamping disk, and the other end of the threaded column is fixedly connected with the clamping knob.

[0012] Preferably, the number of the connecting blocks is two and they are symmetrically distributed on the outer surface of the sliding cylinder, the sliding plate passes through the connecting blocks and is slidingly connected to the connecting blocks, and the clamping disk is slidingly connected to the sliding plate.

[0013] Preferably, the pressure regulating mechanism includes a mounting block, a rotating column, a sliding groove, a threaded rod, a compression spring and a lifting base. The inner surface of the connecting beam is slidingly connected to the mounting block, the top of the mounting block is rotatably connected to the rotating column, the top surface of the connecting beam is provided with a sliding groove, the inner surface of the rotating column is threadedly connected to the threaded rod, the outer surface of the threaded rod is sleeved with a compression spring, and the bottom of the threaded rod is fixedly connected to the lifting base.

[0014] Preferably, the mounting block is slidably connected to the sliding groove, and both ends of the mounting block are fixedly connected to the sliding plate.

[0015] Preferably, the rotating column is slidably connected to the sliding groove, the threaded rod passes through the mounting block, and the lifting base is slidably connected to the sliding groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the PCB board welding pad precision adjustment device has the following effects:

[0017] 1. Through the arrangement of sliding grooves, sliding plates, magnetic clamps, mounting shafts and locking blocks, during use, a sliding plate is slidably connected in the sliding grooves provided on the connecting beam to limit the sliding range of the sliding plate. A longitudinal adjustment mechanism and a welding gun are installed on the sliding plate to realize the lateral movement of the welding gun. The magnetic clamp can be freely adjusted on the connecting beam by magnetic adsorption. When aligned with the sliding plate, the locking block can be lowered. The locking block rotates around the mounting shaft and is stuck on the sliding plate to limit the lateral movement of the sliding plate. At this time, the longitudinal adjustment mechanism can be used to make the welding gun only move longitudinally, thereby realizing precision control of the longitudinal movement of the welding gun.

[0018] 2. Through the arrangement of the mounting cylinder, sliding cylinder, connecting block, threaded column, clamping disk and clamping knob, during use, the connecting block is penetrated by the sliding plate and slidably connected, so that the connecting block can slide on the sliding plate, and the welding gun is driven by the mounting cylinder and the sliding cylinder to realize longitudinal movement. The welding gun is clamped and installed in the mounting cylinder and the sliding cylinder to ensure that it is always perpendicular to the placement base at the bottom and perpendicular to the PCB board. The threaded column is rotated on the connecting block through the clamping knob, and the threaded column moves on the connecting block and drives the clamping disk to move. When the clamping disk approaches the sliding plate in the connecting block, the clamping disks on both sides clamp it, limiting the longitudinal movement of the welding gun. At this time, the welding gun can be made to move only laterally through the lateral adjustment mechanism, thereby realizing precision control of the lateral movement of the welding gun.

[0019] 3. Through the arrangement of the mounting block, rotating column, sliding groove, threaded rod, compression spring and lifting base, during use, the mounting block can slide on the threaded rod and the lifting base. When the welding gun is pressed for welding, the sliding plate will be pressed down together, and the sliding plate will move downward with the mounting block until it contacts the lifting base. When the welding gun is not pressed, the mounting block will be lifted and reset by the compression spring on the lifting base. The threaded rod is connected to the lifting base. By rotating the rotating column, the threaded rod is driven to move and the position of the lifting base is changed. In this way, the downward movement range of the mounting block can be changed, thereby adjusting the welding pressure of the welding gun. Appropriate pressure application can ensure welding quality and ensure that the welding disk applies uniform pressure to the welding area to ensure a good welding connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side view schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a side view schematic diagram of the overall structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the device housing and the fixing block cooperating with each other in the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the clamping plate and the placement base cooperating with each other in the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the connecting beam and the sliding plate cooperating with each other in the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the sliding plate and the locking block cooperating with each other in the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the locking block and the connecting block cooperating with each other in the present invention;

[0027] Figure 8A schematic cross-sectional view of the structure of the connection block and the clamping disc cooperating with each other in the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the sliding plate and the mounting block cooperating with each other in the present invention;

[0029] Figure 10 This is a schematic cross-sectional view of the structure in which the mounting block and the lifting base cooperate with each other according to the present invention.

[0030] In the figure: 1. Equipment housing; 2. Connecting beam; 3. Equipment base; 4. Welding gun; 5. Clamping and positioning mechanism; 501. Fixed block; 502. Mounting rod; 503. Tension spring; 504. Clamping plate; 505. Placement base; 6. Horizontal adjustment mechanism; 601. Sliding groove; 602. Sliding plate; 603. Magnetic clamping plate; 604. Mounting shaft; 605. Locking block; 7. Longitudinal adjustment mechanism; 701. Mounting cylinder; 702. Sliding cylinder; 703. Connecting block; 704. Threaded column; 705. Clamping disk; 706. Clamping knob; 8. Pressure adjustment mechanism; 801. Mounting block; 802. Rotating column; 803. Sliding groove; 804. Threaded rod; 805. Compression spring; 806. Lifting base. DETAILED DESCRIPTION

[0031] 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 implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figure 1-10 The present invention provides a PCB board welding pad precision adjustment device: it includes a device housing 1 and a connecting beam 2, the inner surface of the device housing 1 is fixedly connected to the connecting beam 2, the bottom surface of the device housing 1 is fixedly connected to the device base 3, the inner surface of the connecting beam 2 is installed with a welding gun 4, the bottom surface of the device housing 1 is provided with a clamping and positioning mechanism 5, the inner surface of the connecting beam 2 is provided with a lateral adjustment mechanism 6, the outer surface of the welding gun 4 is provided with a longitudinal adjustment mechanism 7, and the inner surface of the connecting beam 2 is provided with a pressure adjustment mechanism 8. During use, the device housing 1 and the device base 3 provide external protection and install the internal connecting beam 2, and the connecting beam 2 is used to install most components. After the clamping and positioning mechanism 5 clamps the PCB board to be welded, the welding gun 4 adjusts its position through the lateral adjustment mechanism 6 and the longitudinal adjustment mechanism 7, and adjusts the pressure during welding through the pressure adjustment mechanism 8.

[0033] Furthermore, the number of device housings 1 is two and they are symmetrically distributed. Both ends of the connecting beam 2 are fixedly connected to the device housing 1. The connecting beam 2 is made of stainless steel. The symmetrically arranged device housings 1 simultaneously clamp and protect both sides of the connecting beam 2. Stainless steel can be used in conjunction with magnetic components.

[0034] Furthermore, the clamping and positioning mechanism 5 includes a fixed block 501, a mounting rod 502, a tension spring 503, a clamping plate 504 and a placement base 505. The bottom surface of the device housing 1 is fixedly connected to the fixed block 501, the inner surface of the fixed block 501 is fixedly connected to the mounting rod 502, the outer surface of the mounting rod 502 is sleeved with a tension spring 503, the outer surface of the mounting rod 502 is slidably connected to the clamping plate 504, and the inner surface of the clamping plate 504 is slidably connected to the placement base 505. The base 505 is set up. During use, the fixed block 501 is used to support and install the mounting rod 502. The fixed block 501 is respectively located at the center of the equipment housing 1 and the connecting beam 2. The mounting rod 502 is provided with a tension spring 503 and is slidably connected to the clamping plate 504. The tension spring 503 is fixedly connected to the clamping plate 504 and the central fixed block 501. The clamping plate 504 is pulled toward the fixed block 501. The clamping plates 504 on both sides are simultaneously close to the center to clamp the PCB board placed on the base 505 for fixation. It is suitable for PCB boards of different sizes.

[0035] Furthermore, a fixing block 501 is fixedly connected to the bottom surface of the connecting beam 2, the mounting rod 502 passes through the fixing block 501 and is fixedly connected to the fixing block 501, one end of the tension spring 503 is fixedly connected to the fixing block 501, and the other end of the tension spring 503 is fixedly connected to the clamping plate 504. There are two clamping plates 504 and they are symmetrically distributed. The fixing blocks 501 are respectively located at the center of the equipment housing 1 and the connecting beam 2 for supporting and installing the mounting rod 502. The tension spring 503 pulls the clamping plates 504 on both sides toward the fixed block 501 for clamping.

[0036] Furthermore, the lateral adjustment mechanism 6 includes a sliding groove 601, a sliding plate 602, a magnetic splint 603, a mounting shaft 604 and a locking block 605. The inner surface of the connecting beam 2 is provided with a sliding groove 601, the inner surface of the sliding groove 601 is slidably connected to the sliding plate 602, the outer surface of the connecting beam 2 is slidably connected to the magnetic splint 603, the top surface of the magnetic splint 603 is fixedly connected to the mounting shaft 604, and the outer surface of the mounting shaft 604 is rotatably connected to the locking block 605. Through the arrangement of the sliding groove 601, the sliding plate 602, the magnetic splint 603, the mounting shaft 604 and the locking block 605, during use, the connecting beam 2 is connected to the lateral adjustment mechanism 6. A sliding plate 602 is slidably connected in the sliding groove 601 opened on the connecting beam 2, which is used to limit the sliding range of the sliding plate 602. A longitudinal adjustment mechanism 7 and a welding gun 4 are installed on the sliding plate 602 to realize the lateral movement of the welding gun 4. The magnetic clamp 603 is magnetically adsorbed on the connecting beam 2 and can adjust its position freely. When aligned with the sliding plate 602, the locking block 605 can be lowered. The locking block 605 rotates around the mounting axis 604 and is stuck on the sliding plate 602, limiting the lateral movement of the sliding plate 602. At this time, the longitudinal adjustment mechanism 7 can be used to make the welding gun 4 only move longitudinally, thereby realizing precision control of the longitudinal movement of the welding gun 4.

[0037] Furthermore, the number of sliding plates 602 is two and they are symmetrically distributed. The locking block 605 is slidably connected to the sliding plate 602. The symmetrically arranged sliding plate 602 is used to install the longitudinal adjustment mechanism 7. The locking block 605 can be stuck on the sliding plate 602 to limit the lateral movement of the sliding plate 602.

[0038] Furthermore, the longitudinal adjustment mechanism 7 includes a mounting cylinder 701, a sliding cylinder 702, a connecting block 703, a threaded column 704, a clamping disc 705 and a clamping knob 706. The outer surface of the welding gun 4 is engaged with the mounting cylinder 701, the bottom surface of the mounting cylinder 701 is fixedly connected to the sliding cylinder 702, the outer surface of the sliding cylinder 702 is fixedly connected to the connecting block 703, the inner surface of the connecting block 703 is threadedly connected to the threaded column 704, one end of the threaded column 704 is fixedly connected to the clamping disc 705, and the other end of the threaded column 704 is fixedly connected to the clamping knob 706. Through the arrangement of the mounting cylinder 701, the sliding cylinder 702, the connecting block 703, the threaded column 704, the clamping disc 705 and the clamping knob 706, during use, the connecting block 703 is clamped by the sliding plate 602 The connection is penetrated and slidably connected, so that the connecting block 703 can slide on the sliding plate 602, and drive the welding gun 4 to move in the longitudinal direction through the mounting cylinder 701 and the sliding cylinder 702. The welding gun 4 is clamped and installed in the mounting cylinder 701 and the sliding cylinder 702 to ensure that it is always perpendicular to the placement base 505 at the bottom and perpendicular to the PCB board. The threaded column 704 is rotated on the connecting block 703 through the clamping knob 706, and the threaded column 704 moves on the connecting block 703 and drives the clamping disk 705 to move. When the clamping disk 705 approaches the sliding plate 602 in the connecting block 703, the clamping disks 705 on both sides clamp it, limiting the longitudinal movement of the welding gun 4. At this time, the welding gun 4 can be made to move only in the transverse direction through the transverse adjustment mechanism 6, thereby realizing precision control of the transverse movement of the welding gun 4.

[0039] Furthermore, there are two connecting blocks 703 and they are symmetrically distributed on the outer surface of the sliding cylinder 702. The sliding plate 602 passes through the connecting block 703 and is slidingly connected to the connecting block 703. The clamping disk 705 is slidingly connected to the sliding plate 602. The symmetrically arranged connecting blocks 703 disperse the force and balance the weight when moving through the sliding plate 602. The connecting block 703 is passed through by the sliding plate 602 and the sliding connection allows the connecting block 703 to slide on the sliding plate 602. When the clamping disk 705 approaches the sliding plate 602 in the connecting block 703, the clamping disks 705 on both sides clamp it, thereby limiting the movement of the welding gun 4 in the longitudinal direction.

[0040] Furthermore, the pressure regulating mechanism 8 includes a mounting block 801, a rotating column 802, a sliding groove 803, a threaded rod 804, a compression spring 805 and a lifting base 806. The inner surface of the connecting beam 2 is slidably connected to the mounting block 801, the top of the mounting block 801 is rotatably connected to the rotating column 802, the top surface of the connecting beam 2 is provided with a sliding groove 803, the inner surface of the rotating column 802 is threadedly connected to the threaded rod 804, the outer surface of the threaded rod 804 is sleeved with a compression spring 805, and the bottom of the threaded rod 804 is fixedly connected to the lifting base 806. The setting of the lifting base 806, during use, the mounting block 801 can slide on the threaded rod 804 and the lifting base 806. When the welding gun 4 is pressed for welding, the sliding plate 602 will be pressed down together, and the sliding plate 602 will move the mounting block 801 downward until it contacts the lifting base 806. When the welding gun 4 is not pressed, the mounting block 801 will be lifted and reset by the compression spring 805 on the lifting base 806. The threaded rod 804 is connected to the lifting base 806. By rotating the rotating column 802, the threaded rod 804 is driven to move and change the position of the lifting base 806. In this way, the downward movement range of the mounting block 801 can be changed, thereby adjusting the welding pressure of the welding gun 4.

[0041] Furthermore, the mounting block 801 is slidably connected to the sliding groove 601 , and both ends of the mounting block 801 are fixedly connected to the sliding plate 602 . The mounting block 801 moves within the connecting beam 2 along with the lateral adjustment mechanism 6 .

[0042] Furthermore, the rotating column 802 is slidably connected to the sliding groove 803, the threaded rod 804 passes through the mounting block 801, the lifting base 806 is slidably connected to the sliding groove 601, the rotating column 802 moves on the connecting beam 2 through the sliding groove 803, and the threaded rod 804 is controlled by the rotating column 802 to control the position in the mounting block 801, and does not affect the movement of the mounting block 801.

[0043] Working principle: A PCB board welding plate precision adjustment device. During use, the device housing 1 and the device base 3 provide external protection, the connecting beam 2 is used to install the components, the clamping and positioning mechanism 5 is clamped, the welding gun 4 is adjusted in position by the horizontal adjustment mechanism 6 and the vertical adjustment mechanism 7, and the pressure during welding is adjusted by the pressure adjustment mechanism 8. The clamping and positioning mechanism 5 fixes the block 501 to install the mounting rod 502, the tension spring 503 pulls the clamping plate 504 toward the fixed block 501, the sliding plate 602 of the horizontal adjustment mechanism 6 drives the welding gun 4 to move, and the magnetic clamping plate 603 controls the lock. The position of the fixed block 605, the locking block 605 locks the displacement of the lateral adjustment mechanism 6, the longitudinal adjustment mechanism 7 can slide on the sliding plate 602 to drive the welding gun 4 to move, the threaded column 704 is rotated by the clamping knob 706 on the connecting block 703, and the clamping disk 705 is clamped when it approaches the sliding plate 602 in the connecting block 703, locking the displacement of the longitudinal adjustment mechanism 7, and the pressure adjustment mechanism 8 drives the threaded rod 804 to move and change the position of the lifting base 806 by rotating the rotating column 802, thereby changing the downward movement range of the mounting block 801, thereby adjusting the welding pressure of the welding gun 4.

[0044] 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 the 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. A PCB board welding plate precision adjustment device, comprising a device housing (1) and a connecting beam (2), characterized in that: The inner surface of the device housing (1) is fixedly connected to a connecting beam (2), the bottom surface of the device housing (1) is fixedly connected to a device base (3), a welding gun (4) is mounted on the inner surface of the connecting beam (2), a clamping and positioning mechanism (5) is provided on the bottom surface of the device housing (1), and a lateral adjustment mechanism (6) is provided on the inner surface of the connecting beam (2); The lateral adjustment mechanism (6) comprises a sliding groove (601), a sliding plate (602), a magnetic clamping plate (603), a mounting shaft (604) and a locking block (605); the sliding groove (601) is provided on the inner surface of the connecting crossbeam (2); the sliding plate (602) is slidably connected to the inner surface of the sliding groove (601); the magnetic clamping plate (603) is slidably connected to the outer surface of the connecting crossbeam (2); the mounting shaft (604) is fixedly connected to the top surface of the magnetic clamping plate (603); and the locking block (605) is rotatably connected to the outer surface of the mounting shaft (604); The outer surface of the welding gun (4) is provided with a longitudinal adjustment mechanism (7), and the inner surface of the connecting beam (2) is provided with a pressure adjustment mechanism (8); The pressure regulating mechanism (8) comprises a mounting block (801), a rotating column (802), a sliding groove (803), a threaded rod (804), a compression spring (805) and a lifting base (806); the inner surface of the connecting beam (2) is slidably connected to the mounting block (801); the top of the mounting block (801) is rotatably connected to the rotating column (802); the top surface of the connecting beam (2) is provided with a sliding groove (803); the inner surface of the rotating column (802) is threadedly connected to the threaded rod (804); the outer surface of the threaded rod (804) is sleeved with a compression spring (805); and the bottom of the threaded rod (804) is fixedly connected to the lifting base (806).

2. The PCB soldering pad precision adjustment device according to claim 1, characterized in that: The number of the device housings (1) is two and they are symmetrically distributed. Both ends of the connecting crossbeam (2) are fixedly connected to the device housing (1). The connecting crossbeam (2) is made of stainless steel.

3. The PCB soldering pad precision adjustment device according to claim 1, characterized in that: The clamping and positioning mechanism (5) comprises a fixed block (501), a mounting rod (502), a tension spring (503), a clamping plate (504) and a placement base (505); the bottom surface of the device housing (1) is fixedly connected to the fixed block (501); the inner surface of the fixed block (501) is fixedly connected to the mounting rod (502); the outer surface of the mounting rod (502) is sleeved with a tension spring (503); the outer surface of the mounting rod (502) is slidably connected to the clamping plate (504); and the inner surface of the clamping plate (504) is slidably connected to the placement base (505).

4. The PCB soldering pad precision adjustment device according to claim 3, characterized in that: A fixing block (501) is fixedly connected to the bottom surface of the connecting beam (2), the mounting rod (502) passes through the fixing block (501) and is fixedly connected to the fixing block (501), one end of the tension spring (503) is fixedly connected to the fixing block (501), and the other end of the tension spring (503) is fixedly connected to the clamping plate (504), and the number of the clamping plates (504) is two and they are symmetrically distributed.

5. The PCB soldering pad precision adjustment device according to claim 1, characterized in that: The number of the sliding plates (602) is two and they are symmetrically distributed, and the locking block (605) is slidably connected to the sliding plates (602).

6. The PCB soldering pad precision adjustment device according to claim 1, characterized in that: The longitudinal adjustment mechanism (7) includes a mounting cylinder (701), a sliding cylinder (702), a connecting block (703), a threaded column (704), a clamping disc (705) and a clamping knob (706); the outer surface of the welding gun (4) is snap-connected to the mounting cylinder (701); the bottom surface of the mounting cylinder (701) is fixedly connected to the sliding cylinder (702); the outer surface of the sliding cylinder (702) is fixedly connected to the connecting block (703); the inner surface of the connecting block (703) is threadedly connected to the threaded column (704); one end of the threaded column (704) is fixedly connected to the clamping disc (705); and the other end of the threaded column (704) is fixedly connected to the clamping knob (706).

7. The PCB soldering pad precision adjustment device according to claim 6, characterized in that: The number of the connecting blocks (703) is two and they are symmetrically distributed on the outer surface of the sliding cylinder (702); the sliding plate (602) passes through the connecting blocks (703) and is slidably connected to the connecting blocks (703); and the clamping disc (705) is slidably connected to the sliding plate (602).

8. The PCB soldering pad precision adjustment device according to claim 1, characterized in that: The mounting block (801) is slidably connected to the sliding groove (601), and both ends of the mounting block (801) are fixedly connected to the sliding plate (602).

9. The PCB soldering pad precision adjustment device according to claim 1, characterized in that: The rotating column (802) is slidably connected to the sliding groove (803), the threaded rod (804) passes through the mounting block (801), and the lifting base (806) is slidably connected to the sliding groove (601).

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