PCB welding tool and welding method thereof

Abstract

The invention belongs to the technical field of welding tools, and particularly relates to a PCB welding tool and a welding method thereof. Comprising a tool table; a lifting suspended component is arranged on the tool table; the lifting suspended assembly comprises a lifting square cylinder which is connected to the top of the placing frame in a penetrating manner, and the lifting square cylinder and the placing frame are in sliding fit; the end, close to the tool table, of the lifting square cylinder is provided with an opening and is slidably connected with a lifting square column. The end, away from the tool table, of the lifting square cylinder makes contact with the PCB. The gas storage rectangular frame is located at the top of the tool table; the placement rack is located in the gas storage rectangular frame; a light touch damage prevention device is arranged on the gas storage rectangular frame; compared with the prior art, displacement caused by too loose clamping is avoided, damage caused by too tight clamping is prevented, meanwhile, surface damage caused by too large local pressure intensity is reduced, the material loss and the production cost are reduced, meanwhile, the welding qualification rate and the welding effect of the PCB are improved, and the limitation of the welding tool in the application process is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of welding tooling, and in particular relates to a PCB board welding tooling and a welding method thereof. Background Art

[0002] PCB board welding fixtures are auxiliary tools designed specifically for the PCB (printed circuit board) welding process. They are used to fix and position PCB boards and components to ensure the accuracy, efficiency and consistency of welding operations, while reducing manual operation errors and labor intensity. When the fixture fixes the PCB board for welding, the material of the PCB board to be welded needs to be comprehensively selected based on factors such as product performance requirements, application scenarios, and cost budget. However, there are significant differences in the pressure-bearing capacity of different PCB boards. This makes it difficult for existing welding fixtures to apply an appropriate clamping force for different boards. This can easily lead to two problems: clamping too loosely can cause the board to shift during welding, affecting the quality of the solder joints; clamping too tightly can cause the board to deform, crack, or even damage the internal circuit layer. These problems not only reduce the welding qualification rate and welding effect of the PCB board, but also for thinner PCB boards, excessive clamping force is more likely to cause damage, which further increases material loss and production costs, ultimately leading to strong limitations in the application of PCB board welding fixtures. Summary of the Invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a PCB board welding tool and a welding method thereof, which effectively solves the problems in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a PCB board welding tool, comprising a tooling table; a placement rack is mounted on the tooling table, and a PCB board is placed on top of the placement rack; a lifting and suspension assembly is provided on the tooling table, and the assembly is used to lift the PCB board required for welding into the air for operation; the lifting and suspension assembly includes a lifting square cylinder, which is connected to the top of the placement rack and the two are slidably engaged; the lifting square cylinder is opened at one end near the tooling table and is slidably connected to a lifting square column; the lifting square cylinder is in contact with the PCB board at one end away from the tooling table; The gas storage frame is located on the top of the workbench; the placement rack is located in the gas storage frame; the gas storage frame is provided with a light touch anti-damage device for achieving flexibility in the force when clamping the PCB board; the light touch anti-damage device includes a braking square cylinder, which is installed on the side of the gas storage frame close to the workbench; the lifting square cylinder is provided with a frequency modulation positioning unit, which provides power for driving the light touch anti-damage device by connecting to the gas storage frame; the frequency modulation positioning unit includes a first limit plate, which is fixedly installed on the lifting square cylinder; the bottom of the placement rack is located on the moving path of the first limit plate; It also includes an E-shaped air pipe, wherein the middle port is the input end and is installed on the outer wall of the air storage frame; the remaining ports are output ends; the output end of the E-shaped air pipe faces the PCB board; a B valve is provided in the E-shaped air pipe; A pressure column is connected to the output port of the E-shaped air pipe, and the two are slidably matched; a first base is installed on the gas storage frame, which is connected to the E-shaped air pipe; a pressure base block is fixedly installed on the end of the pressure column away from the E-shaped air pipe; a pressure spring is sleeved on the pressure column, one end of which is fixedly connected to the pressure base block, and the other end is fixedly connected to the pressure base block; the two pressure columns are respectively located at the top and bottom of the gas storage frame; the two pressure base blocks are commonly connected to a positioning plate, which is located inside the gas storage frame; and an air storage rubber bag is also included, which is fixedly connected to the side of the positioning plate away from the E-shaped air pipe; A corrugated square tube, one end of which is mounted on the side of the positioning plate away from the air storage rubber bladder, and the other end is mounted on the inner wall of the air storage frame; a C valve is provided in the corrugated square tube; the corrugated square tube is connected to the air storage frame; the corrugated square tube is also connected to the air storage rubber bladder through the positioning plate; the side of the PCB board is located on the movement path of the air storage rubber bladder.

[0005] Preferably, it includes a mounting frame connected to the bottom of the workbench; the mounting frame is connected to a drive motor; A lifting screw is installed on the top of the workbench; the output end of the drive motor is connected to the lifting screw; The displacement thread block is threadedly connected to the lifting screw rod; a displacement tooth column is fixedly installed on the displacement thread block; the displacement tooth column is connected to the bottom of the workbench through and the two are slidably matched.

[0006] Preferably, it includes a displacement gear, which is installed at the bottom of the workbench; the displacement gear is meshed and connected with the displacement gear column; A lifting connection block, which is fixedly connected to the displacement gear column and is located on the top of the workbench; a retaining block is installed on the lifting connection block, which is fixedly connected to the lifting square column; A lifting spring is sleeved on the lifting square tube; one end of the lifting spring is fixedly connected to the retaining block, and the other end is fixedly connected to the first limiting plate.

[0007] Preferably, it includes a second limit plate, which is fixedly mounted on the brake square cylinder; the bottom of the placement rack is located on the moving path of the second limit plate; the second limit plate and the placement rack are provided with contact pieces on the opposite surfaces, and the two contact pieces are electrically connected; A brake square column, which is slidably connected in the brake square cylinder; A brake spring is located in the brake square cylinder; one end of the brake spring is fixedly connected to the inner bottom surface of the brake square cylinder, and the other end is fixedly connected to the brake square column; An L-shaped square column, one end of which is fixedly connected to the retaining block, and the other end of which is fixedly connected to the braking square column; U-shaped air pipe; one end of the U-shaped air pipe is connected to the brake square cylinder, and the two are connected; the other end of the U-shaped air pipe is connected to the air storage frame, and the two are connected; an A valve is provided in the U-shaped air pipe; the position of the first limit plate is higher than the second limit plate.

[0008] Preferably, the displacement gear is provided with a parallel energy absorbing mechanism; the parallel energy absorbing mechanism comprises a first pulley mounted on the displacement gear; A second pulley is mounted on the outer wall of the gas storage frame; the second pulley is also connected to a guide gear; an elastic transmission belt, one end of which is connected to the first pulley and the other end of which is connected to the second pulley; An electric telescopic rod is mounted on a workbench; a tensioning wheel is mounted on the output end of the electric telescopic rod; the tensioning wheel is located on the inner side of the elastic transmission belt and contacts one of the inner side surfaces of the elastic transmission belt; Guide rack; the two guide racks are located on both sides of the guide gear, and the two are meshed with each other; a guide slide is installed on the guide rack; a second base is fixedly installed on the gas storage frame; the guide slide is connected to the second base through and the two are slidably matched; a positioning long block is installed on each of the two guide racks.

[0009] Preferably, it includes a positioning L-tube, the output end of which faces the PCB board; the positioning L-tube is installed on the gas storage frame, and the two are in communication; A positioning cylinder is connected to the output end of the positioning L-tube, and the two are slidably matched; the positioning cylinder is fixedly installed with a limiting horizontal plate at one end away from the positioning L-tube; a third base is installed on the gas storage frame, which is installed outside the output end of the positioning L-tube; A positioning spring is sleeved on the positioning cylinder; one end of the positioning spring is fixedly connected to the third base, and the other end is fixedly connected to the limiting horizontal plate; a limiting slide groove is provided on the side of the limiting horizontal plate away from the positioning cylinder, and a limiting slide column is installed in the limiting slide groove.

[0010] Preferably, it includes a positioning T-plate; the two positioning T-plates are symmetrically connected in the limiting slide groove, and the two are slidably matched; the limiting slide column is sleeved with a limiting spring, one end of which is connected to the inner wall of the limiting slide groove, and the other end is connected to the positioning T-plate; the two positioning long blocks correspond to the positions of the two positioning T-plates respectively; the opposite back surfaces of the two positioning T-plates are each installed with a triggering wheel, which is located on the moving path of the positioning long block; the opposite surfaces of the two positioning T-plates are both penetrated by a driving cylinder, and the two are slidably matched; the opposite ends of the two driving cylinders are each installed with an energy-absorbing oblique block; the PCB board is located on the moving path of the energy-absorbing oblique block; A driving spring is sleeved on the driving cylinder; one end of the driving spring is fixedly connected to the positioning T-plate, and the other end is fixedly connected to the energy-absorbing inclined block, with its inclined surface facing the side of the PCB board.

[0011] The present invention also provides a welding method for a PCB welding tool, comprising the following steps: S1. Place the PCB board on the top of the placement rack, and use the lifting and suspension assembly to lift the PCB board into the air for multi-faceted operations; S2. Operate the light-touch anti-damage device to clamp the PCB board at the current height position, and provide flexible clamping force.

[0012] As can be seen from the above, the PCB board welding tool provided by the present invention has the effect of clamping the PCB board, and the clamping force of the PCB board is flexible. At the same time, the buffering force generated by the air storage rubber bladder and the pressure spring can reduce the impact force caused by welding the PCB board, thereby improving the stability of the PCB board during welding. The clamping force of the positioning plate is transmitted through the air storage rubber bladder. The air storage rubber bladder will produce different compression amounts due to the different space occupied by plates of different thicknesses. Its elastic deformation and buffering properties can adaptively adapt the actual force transmitted to plates with different pressure-bearing capacities, thereby avoiding displacement caused by too loose clamping and damage caused by too tight clamping. At the same time, it reduces surface damage caused by excessive local pressure, reduces material loss and production costs, and improves the welding qualification rate and welding effect of the PCB board. Moreover, the air storage rubber bladder deforms after contacting the PCB board, which increases the contact area with the side of the PCB board, thereby improving the clamping effect of the PCB board and further reducing the limitations of the PCB board in the tooling application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0014] In the attached figure: Figure 1 This is one of the overall structural diagrams of the present invention; Figure 2 This is a schematic diagram of the bottom structure of the tooling table of the present invention; Figure 3 This is a schematic diagram of the gas storage frame structure of the present invention; Figure 4 This is a schematic diagram of the E-type trachea structure of the present invention; Figure 5 This is a schematic diagram of the energy absorbing oblique block structure of the present invention; Figure 6 This is the second schematic diagram of the overall structure of the present invention; Figure 7 This is a cross-sectional view of a U-shaped trachea of ​​the present invention; Figure 8 This is a cross-sectional view of the air storage rubber bag of the present invention; Figure 9This is a schematic diagram of the lifting connection block structure of the present invention; Figure 10 This is a schematic diagram of the positioning long block structure of the present invention; Figure 11 This is a schematic diagram of the L-shaped square column structure of the present invention; Figure 12 This is a schematic diagram of the tensioning wheel structure of the present invention; Figure 13 This is a schematic diagram of the structure of the trigger wheel of the present invention; In the figure: 1. Workbench; 2. Placement rack; 3. Lifting cylinder; 4. Lifting column; 5. Gas storage frame; 6. Braking cylinder; 7. First limit plate; 8. Mounting rack; 9. Drive motor; 10. Lifting screw; 11. Displacement screw block; 12. Displacement gear column; 13. Displacement gear; 14. Lifting connecting block; 15. Retaining block; 16. Lifting spring; 17. Second limit plate; 18. Contact piece; 19. Braking column; 20. Braking spring; 21. L-shaped column; 22. U-shaped air pipe; 23. E-shaped air pipe; 24. Pressing column; 25. First base; 26. Pressing base block; 27. Pressing spring; 28. Positioning plate; 29. ​​Air storage rubber bag; 30. Corrugated square tube; 31. First pulley; 32. Second pulley; 33. Guide gear; 34. Elastic transmission belt; 35. Electric telescopic rod; 36. Tensioning pulley; 37. Guide rack; 38. Guide slide; 39. Second base; 40. Positioning long block; 41. Positioning L-tube; 42. Positioning cylinder; 43. Limiting horizontal plate; 44. Third base; 45. Positioning spring; 46. Limiting slide; 47. Limiting slide; 48. Positioning T-plate; 49. Limiting spring; 50. Trigger wheel; 51. Driving cylinder; 52. Energy-absorbing inclined block; 53. Driving spring. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] Example, by Figures 1 to 13The present invention includes a workbench 1; a placement rack 2 is installed on the workbench 1, and a PCB board is placed on the top of the placement rack 2; a lifting and suspension assembly is provided on the workbench 1, which is used to lift the PCB board required for welding into the air for operation; the lifting and suspension assembly includes a lifting square cylinder 3, which is connected to the top of the placement rack 2, and the two are slidably matched; the lifting square cylinder 3 is opened at one end close to the workbench 1 and is slidably connected to a lifting square column 4; the lifting square cylinder 3 is in contact with the PCB board at one end away from the workbench 1; The gas storage frame 5 is located on the top of the workbench 1; the placement rack 2 is located in the gas storage frame 5; the gas storage frame 5 is provided with a light touch anti-damage device for achieving flexibility in the force when clamping the PCB board; A mounting frame 8 is connected to the bottom of the workbench 1; a drive motor 9 is connected to the mounting frame 8; The lifting screw 10 is installed on the top of the workbench 1; the output end of the driving motor 9 is connected to the lifting screw 10; The displacement screw block 11 is threadedly connected to the lifting screw 10; a displacement tooth column 12 is fixedly mounted on the displacement screw block 11; the displacement tooth column 12 is connected to the bottom of the workbench 1 through and the two are slidably matched; The displacement gear 13 is mounted on the bottom of the workbench 1; the displacement gear 13 is meshed with the displacement gear column 12; A lifting connection block 14 is fixedly connected to the displacement gear column 12 and is located on the top of the workbench 1; a retaining block 15 is installed on the lifting connection block 14 and is fixedly connected to the lifting column 4; A lifting spring 16 is sleeved on the lifting cylinder 3; one end of the lifting spring 16 is fixedly connected to the retaining block 15, and the other end is fixedly connected to the first limiting plate 7; The operator only needs to place the PCB board to be soldered on the placement rack 2, and then start the driving motor 9 to make its output end drive the lifting screw 10 to rotate, so that the displacement screw block 11 connected by the thread can be moved on the upper limit of the workbench 1 through the displacement tooth column 12, so that the lifting square column 4 can be driven to move under the action of the lifting connection block 14, which is connected to the lifting square cylinder 3 through the lifting spring 16, so as to drive the lifting square cylinder 3 to move on the upper limit of the placement rack 2, so as to move up against the PCB board until the first limit plate 7 on the lifting square cylinder 3 contacts the bottom of the placement rack 2, so as to limit the lifting square cylinder 3 to the current height, thereby limiting the PCB board on the lifting square cylinder 3 to the current height for operation, so that the PCB board The suspended operation facilitates the robot arm to operate the welding gun to perform welding operations on the top and bottom of the PCB board at the same time, reducing the limitations of the welding tool during use and improving the welding effect and efficiency of the PCB board. Moreover, after the PCB board is moved into the air for operation, there is no obvious contact between the bottom and the top, which facilitates air circulation, avoids the excessive heat during welding affecting the PCB board itself, and improves the heat dissipation performance of the PCB board during welding. At the same time, after the PCB board stays at the current height, the air storage frame 5 that is subsequently moved up allows the light-touch anti-damage device on the PCB board to limit and clamp the PCB board, preventing the PCB board from shaking during the welding process and reducing the welding accuracy, thereby improving the welding accuracy of the tool for the PCB board.

[0017] The light touch damage prevention device of this embodiment includes a braking square cylinder 6, which is installed on the side of the gas storage frame 5 close to the tooling table 1; The E-shaped air pipe 23 has a central port as an input port, which is mounted on the outer wall of the air storage frame 5; the remaining ports are output ports; the output port of the E-shaped air pipe 23 faces the PCB board; a valve B is provided inside the E-shaped air pipe 23; The pressure column 24 is connected to the output port of the E-shaped air pipe 23, and the two are slidably matched; the first base 25 is installed on the gas storage frame 5, which is connected to the E-shaped air pipe 23; the pressure column 24 is fixedly mounted on the end away from the E-shaped air pipe 23 with a pressure base block 26; the pressure column 24 is provided with a pressure spring 27, one end of which is fixedly connected to the pressure base block 26, and the other end is fixedly connected to the pressure base block 26; the two pressure columns 24 are respectively located at the top and bottom of the gas storage frame 5; the two pressure base blocks 26 are commonly connected to a positioning plate 28, which is located inside the gas storage frame 5; An air storage rubber bag 29 is fixedly connected to the side of the positioning plate 28 away from the E-shaped air pipe 23; A corrugated square tube 30 is mounted on the side of the positioning plate 28 away from the air storage rubber bladder 29 at one end, and on the inner wall of the air storage frame 5 at the other end. A C valve is provided within the corrugated square tube 30. The corrugated square tube 30 is in communication with the air storage frame 5 and the air storage rubber bladder 29 via the positioning plate 28. The side of the PCB is located in the movement path of the air storage rubber bladder 29. After the gas storage frame 5 is moved to the PCB board by the lifting and air-holding assembly, it is located inside the gas storage frame 5, which makes the side of the PCB board located in the working range of the touch anti-damage device. At this time, the gas storage frame 5 will continue to flow into the gas through the frequency modulation positioning unit, and then the B valve at the E-type air pipe 23 will be opened, so that the gas entering the gas storage frame 5 will enter the input end of the E-type air pipe 23, thereby pressing the pressure column 24 at its output end, causing it to move at the output port of the E-type air pipe 23, thereby driving the positioning plate 28 to move, so that it is close to the output port of the E-type air pipe 23. When the positioning plate 28 moves close to the PCB board, the compression spring 27 is in a buffer state, and the positioning plates 28 all move close to the side of the PCB board and contact the PCB board, so that the PCB board can be clamped and set, so that it is fixed at the current height for welding operation, avoiding the instability caused by shaking during use that affects the welding effect of the device; at the same time, when the positioning plate 28 moves close to the PCB board, the corrugated square tube 30 is stretched, and the C valve in the corrugated square tube 30 is opened at this time, so that the gas in the gas storage frame 5 will be diverted to the corrugated square tube 30, so that the gas can be transported to the storage The air rubber bladder 29 expands, and when the positioning plate 28 clamps the PCB, it contacts the expanded air rubber bladder 29, thereby providing a flexible clamping force on the PCB. Simultaneously, the cushioning force provided by the air rubber bladder 29 and the compression spring 27 reduces the impact force caused by soldering the PCB, thereby improving the stability of the PCB during soldering. The clamping force of the positioning plate 28 is transmitted through the air rubber bladder 29. The air rubber bladder 29 will produce different compression amounts due to the different space occupied by plates of different thicknesses. Its elastic deformation and cushioning properties enable the actual force transmitted to plates with different pressure-bearing capacities to be adaptively adapted, thereby avoiding displacement caused by too loose clamping and damage caused by too tight clamping. It also reduces surface damage caused by excessive local pressure, reduces material loss and production costs, and improves the soldering pass rate and soldering quality of the PCB. Furthermore, contact between the air rubber bladder 29 and the PCB causes the air rubber bladder 29 to deform, increasing its contact area with the side of the PCB, thereby improving the clamping effect of the PCB and further reducing the limitations of PCBs in tooling applications.

[0018] In this embodiment, a frequency modulation positioning unit is provided on the lifting cylinder 3, which provides power for driving the touch anti-damage device by connecting to the gas storage frame 5; the frequency modulation positioning unit includes a first limit plate 7, which is fixedly mounted on the lifting cylinder 3; the bottom of the placement rack 2 is located on the moving path of the first limit plate 7; A second limiting plate 17 is fixedly mounted on the brake cylinder 6; the bottom of the placement rack 2 is located on the moving path of the second limiting plate 17; the second limiting plate 17 and the placement rack 2 are provided with contact pieces 18 on the opposite sides thereof, and the two contact pieces 18 are electrically connected; Braking square column 19, which is slidably connected to the braking square cylinder 6; A brake spring 20 is located in the brake square cylinder 6; one end of the brake spring 20 is fixedly connected to the inner bottom surface of the brake square cylinder 6, and the other end is fixedly connected to the brake square column 19; An L-shaped square column 21, one end of which is fixedly connected to the retaining block 15 and the other end of which is fixedly connected to the braking square column 19; A U-shaped air pipe 22; one end of the U-shaped air pipe 22 is connected to the brake square cylinder 6, and the two are connected; the other end of the U-shaped air pipe 22 is connected to the air storage frame 5, and the two are connected; a valve A is provided in the U-shaped air pipe 22; the position of the first limit plate 7 is higher than the second limit plate 17; After the lifting and suspension assembly drives the PCB board to rise to the specified height, the first limit plate 7 on the movable lifting cylinder 3 will contact the bottom of the placement rack 2, making the lifting cylinder 3 unable to move further upward, thereby retaining the PCB board on the lifting cylinder 3 at the current height for operation. At this time, the lifting and suspension assembly is operated to continue to drive the lifting connection block 14 to move upward. Since the lifting cylinder 3 is limited in the current position and cannot move, the retaining block 15 on the lifting connection block 14 drives the lifting column 4 to move within the lifting cylinder 3, so that the lifting spring 16 is in a buffer state. At the same time, since the position of the first limit plate 7 is higher than the second limit plate 17, the braking cylinder 6 on the second limit plate 17 can continue to move, so that The gas storage frame 5 continues to move upward until it is moved to the PCB board that is limited to the current height, so that the second limit plate 17 on the brake square cylinder 6 contacts the bottom of the placement rack 2, so that the gas storage frame 5 is fixed at the current position, that is, the PCB board, so that the light touch anti-damage device on the gas storage frame 5 can be used to perform a flexible clamping operation on the PCB board in the gas storage frame 5. At this time, the lifting connection block 14 continues to move upward, so that the positions of the gas storage frame 5 and the PCB board are further fixed at the current position to avoid deviation; at the same time, the second limit plate 17 and the placement rack 2 opposite surfaces are provided with contact pieces 18 to open the A valve and touch the B valve in the E-type air pipe 23 at the anti-damage device. At this time, the L-shaped square column The brake column 19 on 21 moves within the limited brake square cylinder 6, so that the brake spring 20 is in a buffer state, so that the space in the brake square cylinder 6 is compressed, so that the gas inside it continuously enters the gas storage frame 5 through the U-shaped air pipe 22, which is used to provide a power source for the light-touch anti-damage device, so that it is used to clamp the PCB board located in the gas storage frame 5; at the same time, after the light-touch anti-damage device clamps the PCB board, the B valve is closed to avoid the light-touch anti-damage device from being dislocated due to non-human factors during use, thereby reducing the limitations of the device during use; at the same time, by opening the valve in the positioning L tube 41 at the energy absorption mechanism, the gas entering the gas storage frame 5 flows into the positioning L tube 41, which is used to absorb the energy obliquely The block 52 moves to the top and bottom of the PCB board. At the same time, the brake square column 19 is still limited and moved in the brake square cylinder 6, so that the displacement tooth column 12 is still in a continuous upward state, which is used to drive the energy-absorbing inclined block 52 to move close to the top and bottom of the PCB board, thereby reducing the impact force of the PCB board during welding and improving welding stability and accuracy. The entire working step is carried out in batches through the operation of the frequency modulation positioning unit, and the process does not require manual intervention, thereby improving the welding and use effect of the device. At the same time, after the PCB board is lifted, the gas storage frame 5 is moved up to the PCB board so that it is inside the gas storage frame 5. The gas storage frame 5 can facilitate the reference positioning of the robotic arm used for welding to avoid operational deviation affecting welding accuracy.

[0019] In this embodiment, the displacement gear 13 is provided with a parallel energy absorption mechanism; the parallel energy absorption mechanism includes a first pulley 31, which is mounted on the displacement gear 13; The second pulley 32 is mounted on the outer wall of the gas storage frame 5; the second pulley 32 is also connected to the guide gear 33; an elastic transmission belt 34 , one end of which is connected to the first pulley 31 and the other end of which is connected to the second pulley 32 ; An electric telescopic rod 35 is mounted on the workbench 1; a tensioning pulley 36 is mounted on the output end of the electric telescopic rod 35; the tensioning pulley 36 is located on the inner side of the elastic transmission belt 34 and contacts one of the inner side surfaces of the elastic transmission belt 34; Guide rack 37; two guide racks 37 are located on both sides of the guide gear 33 and mesh with each other; a guide slide 38 is installed on the guide rack 37; a second base 39 is fixedly installed on the gas storage frame 5; the guide slide 38 is connected to the second base 39 through and the two are slidably engaged; a positioning long block 40 is installed on each of the two guide racks 37; Positioning L-tube 41, with its output end facing the PCB board; the positioning L-tube 41 is installed on the gas storage frame 5, and the two are in communication; The positioning cylinder 42 is connected to the output end of the positioning L-tube 41, and the two are slidably matched; the positioning cylinder 42 is fixedly mounted with a limiting horizontal plate 43 at one end away from the positioning L-tube 41; the gas storage frame 5 is mounted with a third base 44, which is installed outside the output end of the positioning L-tube 41; A positioning spring 45 is sleeved on the positioning cylinder 42; one end of the positioning spring 45 is fixedly connected to the third base 44, and the other end is fixedly connected to the limiting horizontal plate 43; a limiting slide groove 46 is provided on the side of the limiting horizontal plate 43 away from the positioning cylinder 42, and a limiting slide post 47 is installed in the limiting slide groove 46; Positioning T-plate 48; the two positioning T-plates 48 are symmetrically connected to the limiting slide 46, and the two are slidably engaged; the limiting slide 47 is sleeved with a limiting spring 49, one end of which is connected to the inner wall of the limiting slide 46 and the other end is connected to the positioning T-plate 48; the two positioning long blocks 40 correspond to the positions of the two positioning T-plates 48 respectively; the opposite back surfaces of the two positioning T-plates 48 are both installed with a triggering wheel 50, which is located in the moving path of the positioning long blocks 40; the opposite surfaces of the two positioning T-plates 48 are both penetrated by a driving cylinder 51, and the two are slidably engaged; the opposite ends of the two driving cylinders 51 are both installed with an energy-absorbing inclined block 52; the PCB board is located in the moving path of the energy-absorbing inclined block 52; A drive spring 53 is sleeved on the drive cylinder 51; one end of the drive spring 53 is fixedly connected to the positioning T-plate 48, and the other end is fixedly connected to the energy-absorbing inclined block 52, with its inclined surface facing the side of the PCB board; When the gas storage frame 5 moves upward, the movable displacement tooth column 12 engages the displacement gear 13 to rotate. Under the action of the first pulley 31 and the elastic transmission belt 34, the second pulley 32 is driven to rotate, so that the guide gear 33 on it rotates and engages the two guide racks 37 to move relative to each other, so that they are limited by the guide slide column 38 on the second base 39, thereby causing the two positioning long blocks 40 to move relative to each other, both moving close to the trigger wheel 50 and contacting each other, so as to push the positioning T-plate 48 on the trigger wheel 50 to move within the limiting slide groove 46 on the limiting horizontal plate 43, so that the limiting spring 49 is in a buffering state, thereby causing the two positioning T-plates 48 to move relative to each other, and the positioning T-plates 48 are equivalent to being set on the gas storage frame 5 and moving together. When the gas storage frame 5 is limited around the lifted PCB board, the displacement tooth column 12 continues to move, causing the positioning T-plates 48 to continue to move. This movement will cause the valve (not shown) in the positioning L-tube 41 to open and gas will gush out. The gas acts The positioning cylinder 42 is used to limit the movement within the output end of the positioning L tube 41, so that the positioning spring 45 is in a buffering state, thereby driving the limiting horizontal plate 43 to move, so that it moves close to the side of the PCB board, and the positioning T plate 48 is provided on the limiting horizontal plate 43, that is, when the gas storage moment frame 5 is limited, the movement of the positioning T plate 48 is in an oblique trend, so that the two positioning T plates 48 on the limiting horizontal plate 43 move to the top and bottom of the PCB board respectively, and the energy absorbing oblique block 52 is driven by the driving cylinder 51 and the driving spring 53 to move close to the PCB board, so that the two energy absorbing oblique blocks 52 contact the PCB board, which is used to support and position the PCB board. At the same time, the buffering force brought by the energy absorbing oblique block 52 itself and the driving spring 53 can further reduce the impact force on the PCB board during welding, thereby improving the stability of PCB board welding, and at the same time limiting it in multiple directions to avoid the deviation of the welding position caused by the offset of the PCB board when welding electronic components, thereby improving the welding accuracy; It is worth mentioning that when the gas storage frame 5 moves upward and drives the second pulley 32 to move synchronously, the distance between it and the first pulley 31 will become larger. At this time, the elastic transmission belt 34 is stretched, causing it to deform without affecting the transmission; when the second pulley 32 resets and moves, the elastic transmission belt 34 slowly resets, but long-term use will cause the elastic transmission belt 34 to loosen and affect the transmission efficiency. At this time, the electric telescopic rod 35 is operated to drive the tensioning wheel 36 to move, and the tensioning wheel 36 contacts the elastic transmission belt 34 to pull the elastic transmission belt 34, which can be used to adjust its tension, thereby avoiding low transmission efficiency caused by the looseness of the elastic transmission belt 34 and affecting the use effect of the parallel energy absorption mechanism.

[0020] The present invention also provides a welding method for a PCB welding tool, comprising the following steps: S1, place the PCB board on the top of the placement rack 2, and use the lifting and suspension assembly to lift the PCB board into the air for multi-faceted operations; S2. Operate the light-touch anti-damage device to clamp the PCB board at the current height position, and provide flexible clamping force.

[0021] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0022] 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. A PCB board welding tool, comprising a tooling table; characterized in that: A placement rack is mounted on the workbench, and a PCB is placed on top of the placement rack. A lifting and suspension assembly is provided on the workbench, which is used to lift the PCB required for soldering into the air for operation. The lifting and suspension assembly includes a lifting square cylinder, which is connected to the top of the placement rack and the two are slidably engaged. The lifting square cylinder is opened at one end close to the workbench and is slidably connected to a lifting square column. The lifting square cylinder is in contact with the PCB at one end away from the workbench. The gas storage frame is located on the top of the workbench; the placement rack is located in the gas storage frame; the gas storage frame is provided with a light touch anti-damage device for achieving flexibility in the force when clamping the PCB board; the light touch anti-damage device includes a braking square cylinder, which is installed on the side of the gas storage frame close to the workbench; the lifting square cylinder is provided with a frequency modulation positioning unit, which provides power for driving the light touch anti-damage device by connecting to the gas storage frame; the frequency modulation positioning unit includes a first limit plate, which is fixedly installed on the lifting square cylinder; the bottom of the placement rack is located on the moving path of the first limit plate; It also includes an E-shaped air pipe, wherein the middle port is the input end and is installed on the outer wall of the air storage frame; the remaining ports are output ends; the output end of the E-shaped air pipe faces the PCB board; a B valve is provided in the E-shaped air pipe; A pressure column is connected to the output port of the E-shaped air pipe, and the two are slidably matched; a first base is installed on the gas storage frame, which is connected to the E-shaped air pipe; a pressure base block is fixedly installed on the end of the pressure column away from the E-shaped air pipe; a pressure spring is sleeved on the pressure column, one end of which is fixedly connected to the pressure base block, and the other end is fixedly connected to the pressure base block; the two pressure columns are respectively located at the top and bottom of the gas storage frame; the two pressure base blocks are commonly connected to a positioning plate, which is located inside the gas storage frame; and an air storage rubber bag is also included, which is fixedly connected to the side of the positioning plate away from the E-shaped air pipe; A corrugated square tube, one end of which is mounted on the side of the positioning plate away from the air storage rubber bladder, and the other end is mounted on the inner wall of the air storage frame; a C valve is provided in the corrugated square tube; the corrugated square tube is connected to the air storage frame; the corrugated square tube is also connected to the air storage rubber bladder through the positioning plate; the side of the PCB board is located on the movement path of the air storage rubber bladder.

2. The PCB welding tool according to claim 1, characterized in that: It includes a mounting frame connected to the bottom of the workbench; the mounting frame is connected to a drive motor; A lifting screw, which is installed on the top of the workbench; The output end of the driving motor is connected to the lifting screw; The displacement thread block is threadedly connected to the lifting screw rod; a displacement tooth column is fixedly installed on the displacement thread block; the displacement tooth column is connected to the bottom of the workbench through and the two are slidably matched.

3. The PCB welding tool according to claim 2, characterized in that: It includes a displacement gear, which is installed at the bottom of the workbench; the displacement gear is meshed with the displacement gear column; A lifting connection block, which is fixedly connected to the displacement gear column and is located on the top of the workbench; a retaining block is installed on the lifting connection block, which is fixedly connected to the lifting square column; A lifting spring is sleeved on the lifting square tube; one end of the lifting spring is fixedly connected to the retaining block, and the other end is fixedly connected to the first limiting plate.

4. The PCB welding tool according to claim 3, characterized in that: It includes a second limit plate, which is fixedly mounted on the brake square cylinder; the bottom of the placement rack is located on the moving path of the second limit plate; the second limit plate and the placement rack are provided with contact pieces on the opposite sides, and the two contact pieces are electrically connected; A brake square column, which is slidably connected in the brake square cylinder; A brake spring is located in the brake square cylinder; one end of the brake spring is fixedly connected to the inner bottom surface of the brake square cylinder, and the other end is fixedly connected to the brake square column; An L-shaped square column, one end of which is fixedly connected to the retaining block, and the other end of which is fixedly connected to the braking square column; U-shaped air pipe; one end of the U-shaped air pipe is connected to the brake square cylinder, and the two are connected; the other end of the U-shaped air pipe is connected to the air storage frame, and the two are connected; an A valve is provided in the U-shaped air pipe; the position of the first limit plate is higher than the second limit plate.

5. The PCB welding tool according to claim 4, characterized in that: The displacement gear is provided with a parallel energy absorbing mechanism; the parallel energy absorbing mechanism comprises a first pulley, which is mounted on the displacement gear; A second pulley is mounted on the outer wall of the gas storage frame; the second pulley is also connected to a guide gear; an elastic transmission belt, one end of which is connected to the first pulley and the other end of which is connected to the second pulley; An electric telescopic rod is mounted on a workbench; a tensioning wheel is mounted on the output end of the electric telescopic rod; the tensioning wheel is located on the inner side of the elastic transmission belt and contacts one of the inner side surfaces of the elastic transmission belt; Guide rack; the two guide racks are located on both sides of the guide gear, and the two are meshed with each other; a guide slide is installed on the guide rack; a second base is fixedly installed on the gas storage frame; the guide slide is connected to the second base through and the two are slidably matched; a positioning long block is installed on each of the two guide racks.

6. The PCB welding tool according to claim 5, characterized in that: It includes a positioning L-tube, the output end of which faces the PCB board; the positioning L-tube is installed on the gas storage frame, and the two are connected; A positioning cylinder is connected to the output end of the positioning L-tube, and the two are slidably matched; the positioning cylinder is fixedly installed with a limiting horizontal plate at one end away from the positioning L-tube; a third base is installed on the gas storage frame, which is installed outside the output end of the positioning L-tube; A positioning spring is sleeved on the positioning cylinder; one end of the positioning spring is fixedly connected to the third base, and the other end is fixedly connected to the limiting horizontal plate; a limiting slide groove is provided on the side of the limiting horizontal plate away from the positioning cylinder, and a limiting slide column is installed in the limiting slide groove.

7. The PCB welding tool according to claim 6, characterized in that: It includes a positioning T-plate; the two positioning T-plates are symmetrically connected to the limiting slide groove and the two are slidably matched; the limiting slide column is sleeved with a limiting spring, one end of which is connected to the inner wall of the limiting slide groove and the other end is connected to the positioning T-plate; the two positioning long blocks correspond to the positions of the two positioning T-plates respectively; the opposite back surfaces of the two positioning T-plates are equipped with a triggering wheel, which is located on the moving path of the positioning long blocks; the opposite surfaces of the two positioning T-plates are penetrated by a driving cylinder, and the two are slidably matched; the opposite ends of the two driving cylinders are equipped with an energy-absorbing oblique block; the PCB board is located on the moving path of the energy-absorbing oblique block; A driving spring is sleeved on the driving cylinder; one end of the driving spring is fixedly connected to the positioning T-plate, and the other end is fixedly connected to the energy-absorbing inclined block, with its inclined surface facing the side of the PCB board.

8. A welding method for a PCB board welding tool, using the PCB board welding tool as claimed in claim 1, characterized in that: Including steps: Step 1: Place the PCB board on the top of the placement rack, and use the lifting and suspension assembly to lift the PCB board into the air for multi-faceted operations; Step 2: Operate the light-touch anti-damage device to clamp the PCB board at the current height position, and provide flexible clamping force.

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