Adjusting device for wave soldering of PCBA circuit board

Abstract

The utility model discloses an adjusting device for wave soldering of a PCBA (printed circuit board assembly) circuit board, which comprises a machine body, two sliding rails are mounted in the machine body, supporting chains are mounted on the outer surfaces of the two sliding rails in a sliding manner, a fixed plate is fixedly mounted at the top end of one sliding rail, a guide plate is fixedly mounted on the inner wall of the rear side of the machine body, and the guide plate is fixedly mounted on the inner wall of the rear side of the machine body. Supporting plates are fixedly mounted at the two ends of the guide plate, a motor is fixedly mounted at one end of one supporting plate, the outer surface of the motor is fixedly sleeved with a mounting base, the mounting base is fixedly mounted on the inner wall of the machine body, a lead screw is fixedly mounted on an output shaft of the motor, and the two ends of the lead screw are rotationally mounted in the supporting plates; the distance between the two guide rails is adjusted through multi-fulcrum uniform extrusion of the guide rails, the problems of deflection and abrasion of transmission of a traditional single-end lead screw are solved, the problem of distance deviation of the guide rails is avoided, and stable conveying of the guide rails is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of electronic manufacturing, and in particular relates to an adjustment device for wave soldering of PCBA circuit boards. Background Technology

[0002] In the production and manufacturing of PCBA circuit boards, wave soldering is the core process for connecting through-hole components (THT) to the circuit board. Its quality directly affects the reliability of electronic products, and guide rail spacing adjustment is a key technical parameter of wave soldering equipment.

[0003] Many wave soldering machines are designed with lead screw drives at one end of the two guide rails to adjust the spacing. During long-distance transmission, the lead screw is prone to bending deformation, causing spacing deviation at the other end of the guide rail. As the usage time increases, wear of the lead screw will also aggravate this deviation, resulting in poor parallelism of the guide rails, affecting the smooth transport of circuit boards and causing soldering defects. Utility Model Content

[0004] This invention addresses the problem that many existing wave soldering machines use lead screw drives at one end of the two guide rails to adjust the spacing. During long-distance transmission, the lead screw is prone to bending deformation, causing spacing deviations at the other end of the guide rails. With increasing usage time, lead screw wear exacerbates this deviation, leading to poor guide rail parallelism, affecting the smooth transport of circuit boards, and causing soldering defects. The following technical solution is proposed:

[0005] An adjustment device for wave soldering of PCBA circuit boards includes: a body, two slide rails installed inside the body, support chains slidably mounted on the outer surfaces of both slide rails, a fixed plate fixedly mounted at the top of one of the slide rails, a guide plate fixedly mounted on the inner rear wall of the body, support plates fixedly mounted at both ends of the guide plate, a motor fixedly mounted at one end of one of the support plates, a mounting seat fixedly sleeved on the outer surface of the motor, the mounting seat fixedly mounted on the inner wall of the body, a lead screw fixedly mounted on the output shaft of the motor, both ends of the lead screw rotatably mounted inside the support plate, three sliders threadedly connected to the outer surface of the lead screw, a common transmission rod slidably mounted inside the three sliders, and the transmission rod fixedly mounted on the rear side of the fixed plate.

[0006] As a preferred embodiment of the above technical solution, an electric push rod is fixedly installed at the top of another slide rail. A piston is fixedly installed at the movable end of the electric push rod. A sleeve is movably fitted onto the outer surface of the piston. The sleeve is fixedly installed at the top of the slide rail. A Y-type tee connector is connected through one end of the sleeve. A bracket is fixedly installed on opposite sides of both slide rails. An airbag is rotatably installed on the outer surface of both brackets. A connecting pipe is connected through one end of both airbags. Both connecting pipes are connected to the Y-type tee connector.

[0007] As a preferred embodiment of the above technical solution, the front side of the guide plate is an inclined surface, and the horizontal distance between the front side of the guide plate and the fixed plate gradually decreases towards the motor. The three sliders are in contact with each other on the opposite side of the guide plate.

[0008] As a preferred embodiment of the above technical solution, each of the three sliders has a connecting channel inside, and the transmission rod is slidably installed inside the connecting channel.

[0009] As a preferred embodiment of the above technical solution, the two airbags will not come into contact when the slide rail moves.

[0010] As a preferred embodiment of the above technical solution, the airbag is made of a high-temperature resistant material, the airbag is filled with a high-temperature resistant inert gas, and the connecting tube is made of fluororubber.

[0011] The beneficial effects of this utility model are as follows:

[0012] (1) By uniformly pressing the guide rails at multiple support points to adjust the distance between the two guide rails, the problem of deflection and wear of traditional single-end screw drive is solved, the problem of guide rail spacing deviation is avoided, and the smooth conveying of the guide rails is guaranteed.

[0013] (2) The through-hole components are squeezed by the airbag, and the through-hole components and the circuit board are tightly connected, which ensures that the circuit board can be stably soldered when passing through the solder bath. This avoids problems such as soldering failure, functional degradation, and production loss caused by the vibration of the wave soldering machine and the misalignment of the circuit board when passing through the solder bath. Attached Figure Description

[0014] Figure 1 The diagram shown is a structural schematic of an embodiment of the adjustment device for wave soldering of PCBA circuit boards according to this utility model;

[0015] Figure 2 The diagram shown is a schematic diagram of the screw installation structure in an embodiment of the adjustment device for wave soldering of PCBA circuit boards of this utility model;

[0016] Figure 3 The diagram shown is a schematic diagram of the slider installation structure in an embodiment of the adjustment device for wave soldering of PCBA circuit boards of this utility model;

[0017] Figure 4 The diagram shows the installation structure of the sleeve in an embodiment of the adjustment device for wave soldering of PCBA circuit boards according to this utility model.

[0018] In the diagram: 1. Body; 2. Slide rail; 3. Support chain; 4. Fixing plate; 5. Guide plate; 6. Support plate; 7. Motor; 8. Mounting base; 9. Lead screw; 10. Slider; 11. Transmission rod; 12. Electric push rod; 13. Piston; 14. Sleeve; 15. Y-type tee connector; 16. Bracket; 17. Airbag; 18. Connecting pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0020] This utility model provides an adjustment device for wave soldering of PCBA circuit boards, such as Figures 1 to 4 As shown, the system includes a body 1, a control panel fixedly mounted on the top of one side of the body 1, two slide rails 2 installed inside the body 1, one slide rail 2 fixedly mounted inside the body 1, and the other slide rail 2 slidably mounted inside the body 1, with support chains 3 slidably mounted on the outer surface of both slide rails 2, a flux nozzle structure fixedly mounted at the bottom of the body 1 near the control panel, through which flux is sprayed onto the bottom of the circuit board conveyed by the support chain 3, a solder bath fixedly mounted at the middle of the bottom of the body 1, for wave soldering of the circuit board, a fan fixedly mounted on the other side of the bottom of the body 1, for cooling the soldered circuit board, a fixing plate 4 fixedly mounted on the top of one of the slide rails 2, and a guide plate 5 fixedly mounted on the inner rear wall of the body 1. Figure 2 and Figure 3 As shown, the front side of the guide plate 5 is an inclined surface. The horizontal distance between the front side of the guide plate 5 and the fixed plate 4 gradually decreases towards the motor 7. The three sliders 10 are in contact with each other on the opposite side of the guide plate 5. By moving on the inclined surface, the three sliders 10 can adjust the gap between the fixed plate 4 and the guide plate 5. Support plates 6 are fixedly installed at both ends of the guide plate 5. A motor 7 is fixedly installed at one end of one of the support plates 6. A mounting seat 8 is fixedly sleeved on the outer surface of the motor 7. The mounting seat 8 is fixedly installed on the inner wall of the machine body 1. A lead screw 9 is fixedly installed on the output shaft of the motor 7. Both ends of the lead screw 9 are rotatably installed inside the support plate 6. Three sliders 10 are threadedly connected to the outer surface of the lead screw 9. The same transmission rod 11 is slidably installed inside the three sliders 10. The transmission rod 11 is fixedly installed. Mounted on the rear side of the fixed plate 4, the motor 7 drives the lead screw 9 to rotate, causing the three sliders 10 on the lead screw 9 to move synchronously. When the three sliders 10 move towards the motor 7, they jointly push the fixed plate 4 to move, gradually increasing the horizontal distance between the guide plate 5 and the fixed plate 4, thus shortening the distance between the two slide rails 2. When the three sliders 10 move away from the motor 7, they pull the fixed plate 4 through the transmission rod 11, gradually bringing the horizontal distance between the fixed plate 4 and the guide plate 5 closer, thus gradually increasing the distance between the two slide rails 2. By using the three sliders 10 to evenly press the fixed plate 4 at multiple support points, the two guide rails can be stably adjusted, avoiding the problem of spacing deviation between the two guide rails.

[0021] like Figure 2 and Figure 3 As shown, each of the three sliders 10 has a connecting channel inside, and the transmission rod 11 is slidably installed inside the connecting channel. By passing the transmission rod 11 through the interior of the three sliders 10, the space occupied by the connection between the transmission rod 11 and the three sliders 10 is reduced.

[0022] like Figure 2 and Figure 4 As shown, an electric push rod 12 is fixedly installed at the top of another slide rail 2. A piston 13 is fixedly installed at the movable end of the electric push rod 12. A sleeve 14 is movably sleeved on the outer surface of the piston 13. The sleeve 14 is fixedly installed at the top of the slide rail 2. A Y-shaped tee connector 15 is connected through one end of the sleeve 14. A bracket 16 is fixedly installed on opposite sides of both slide rails 2. Both brackets 16 are located directly above the solder bath. An airbag 17 is rotatably installed on the outer surface of both brackets 16. A connecting pipe 18 is connected through one end of both airbags 17. All are connected to Y-type tee connectors 15. When the circuit board passes the airbag 17, the electric push rod 12 is activated. The electric push rod 12 pushes the piston 13 to slide inside the sleeve 14. The piston 13 squeezes the gas inside the sleeve 14, so that the gas is transmitted to the two airbags 17 through the connecting pipe 18. The airbags 17 expand and squeeze the circuit board, so that the through-hole components that have loosened due to the vibration of the wave soldering machine are tightly attached to the circuit board. The through-hole components that are tightly attached to the circuit board are wave soldered through the solder bath at the bottom, so that the circuit board and the through-hole components are firmly welded.

[0023] like Figure 2 and Figure 4 As shown, the airbag 17 is made of high-temperature resistant material and is filled with high-temperature resistant inert gas. The connecting tube 18 is made of fluororubber. The airbag 17 is made of a high-temperature resistant material and can withstand the high-temperature environment inside the wave soldering machine. The high-temperature resistant inert gas inside the airbag 17 effectively avoids chemical reactions caused by high temperatures, ensuring the stable operation of the airbag 17. The connecting tube 18 is made of fluororubber. With the excellent high-temperature resistance of fluororubber, the risk of damage to the connecting tube 18 due to excessive temperature is further reduced, thereby ensuring that the device can operate stably in the high-temperature environment of the wave soldering machine. When the slide rail 2 moves, the two airbags 17 will not contact each other. By ensuring that the installation positions of the two airbags 17 do not overlap, it is avoided that the two airbags 17 will collide when the distance between the two slide rails 2 decreases, which would affect the adjustment of the distance between the slide rails 2.

[0024] The working principle of this utility model is as follows: First, the distance between the two slide rails 2 is adjusted according to the circuit board to be welded. The motor 7 drives the lead screw 9 to rotate, causing the three sliders 10 on the lead screw 9 to move synchronously. When the three sliders 10 move towards the motor 7, they jointly push the fixed plate 4 to move, gradually increasing the horizontal distance between the guide plate 5 and the fixed plate 4, thus shortening the distance between the two slide rails 2. When the three sliders 10 move away from the motor 7, they pull the fixed plate 4 through the transmission rod 11, gradually bringing the horizontal distance between the fixed plate 4 and the guide plate 5 closer, thus gradually increasing the distance between the two slide rails 2. Through the three sliders 10 applying even pressure to the fixed plate 4 at multiple support points, the two guide rails can be stably adjusted, preventing misalignment between them. To address the spacing discrepancy issue, the circuit board to be soldered is then placed on support chain 3 for conveying. First, flux is sprayed onto the bottom of the circuit board through the flux nozzle structure, and then it reaches the top of the solder bath for wave soldering. When the circuit board passes the airbag 17, the electric push rod 12 is activated. The electric push rod 12 pushes the piston 13 to slide inside the sleeve 14. The piston 13 compresses the gas inside the sleeve 14, causing the gas to be transmitted to the two airbags 17 through the connecting pipe 18. This causes the airbags 17 to expand and compress the circuit board. At the same time, the movement of the circuit board causes the airbags 17 to rotate on the outer surface of the bracket 16, so that the through-hole components that have loosened due to the vibration generated during the operation of the wave soldering machine are tightly attached to the circuit board. The through-hole components that are tightly attached to the circuit board are wave soldered through the solder bath at the bottom, making the circuit board and the through-hole components firmly welded. After the soldering is completed, the fan cools the circuit board.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustment device for wave soldering of PCBA circuit boards, characterized in that, include: The machine body (1) has two slide rails (2) installed inside. Support chains (3) are slidably installed on the outer surfaces of the two slide rails (2). A fixing plate (4) is fixedly installed at the top of one of the slide rails (2). A guide plate (5) is fixedly installed on the inner wall of the rear side of the machine body (1). Support plates (6) are fixedly installed at both ends of the guide plate (5). A motor (7) is fixedly installed at one end of one of the support plates (6). A mounting seat (8) is fixedly sleeved on the outer surface of the motor (7). The mounting seat (8) is fixedly installed on the inner wall of the machine body (1). A lead screw (9) is fixedly installed on the output shaft of the motor (7). Both ends of the lead screw (9) are rotatably installed inside the support plate (6). Three sliders (10) are threadedly connected to the outer surface of the lead screw (9). The same transmission rod (11) is slidably installed inside the three sliders (10). The transmission rod (11) is fixedly installed on the rear side of the fixing plate (4).

2. The adjustment device for wave soldering of PCBA circuit boards according to claim 1, characterized in that, Another slide rail (2) is fixedly mounted with an electric push rod (12) at its top end. The movable end of the electric push rod (12) is fixedly mounted with a piston (13). A sleeve (14) is movably sleeved on the outer surface of the piston (13). The sleeve (14) is fixedly mounted on the top end of the slide rail (2). A Y-type tee connector (15) is connected through one end of the sleeve (14). A bracket (16) is fixedly mounted on the opposite side of both slide rails (2). An airbag (17) is rotatably mounted on the outer surface of both brackets (16). A connecting pipe (18) is connected through one end of both airbags (17). Both connecting pipes (18) are connected to the Y-type tee connector (15).

3. The adjustment device for wave soldering of PCBA circuit boards according to claim 1, characterized in that, The front side of the guide plate (5) is an inclined surface. The horizontal distance between the front side of the guide plate (5) and the fixed plate (4) gradually decreases towards the motor (7). The three sliders (10) are in contact with each other on the opposite side of the guide plate (5).

4. The adjustment device for wave soldering of PCBA circuit boards according to claim 1, characterized in that, Each of the three sliders (10) has a connecting channel inside, and the transmission rod (11) is slidably installed inside the connecting channel.

5. The adjustment device for wave soldering of PCBA circuit boards according to claim 2, characterized in that, When the slide rail (2) moves, the two airbags (17) will not come into contact.

6. The adjustment device for wave soldering of PCBA circuit boards according to claim 2, characterized in that, The airbag (17) is made of high-temperature resistant material, and the airbag (17) is filled with high-temperature resistant inert gas. The connecting tube (18) is made of fluororubber.

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