Automatic positioning spot welding device adaptive to PCBA (Printed Circuit Board Assembly) processing production line

Abstract

The invention relates to the technical field of spot welding equipment, and particularly discloses an automatic positioning spot welding device adaptive to a PCBA processing production line, the automatic positioning spot welding device comprises a rack and a conveying belt, and the conveying belt is rotatably arranged at the top of the rack. The PCBA to be machined is subjected to automatic spot welding machining to the position under the spot welding assembly through the conveying belt, before the PCBA is subjected to spot welding machining, the surface of the PCBA to be machined is cleaned through the feeding treatment frame, the quality of the PCBA in follow-up spot welding machining is guaranteed, and after the surface of the PCBA is cleaned, the PCBA is subjected to automatic spot welding machining. The PCBA is fed into the spot welding processing frame to be subjected to automatic positioning spot welding processing, after automatic positioning spot welding processing of the PCBA is completed in the spot welding processing frame, welding slag cleaning processing is conducted on the PCBA subjected to spot welding processing through the discharging processing frame, and the surface quality of the PCBA subjected to spot welding processing is improved to a great extent.

Description

Technical Field

[0001] The present invention relates to the technical field of spot welding equipment, and in particular to an automatic positioning spot welding device suitable for a PCBA processing production line. Background Art

[0002] With the rapid development of the electronics manufacturing industry, the speed of electronic product replacement is accelerating, which puts higher requirements on the processing quality and efficiency of printed circuit board assemblies (PCBA). In the PCBA production process, spot welding is a key process, and its quality directly affects the electrical performance and reliability of the entire circuit board. Traditional PCBA spot welding processing often relies on manual operation, which is not only inefficient, but also difficult to ensure the consistency and accuracy of solder joints. Manual positioning of spot welding positions is prone to deviation, resulting in unstable solder joint quality, which may cause problems such as cold soldering and short circuits, seriously affecting product quality. In addition, manual operation also faces problems such as high labor intensity and long production cycle, which is difficult to meet the needs of modern large-scale, high-precision electronic manufacturing.

[0003] In order to improve the automation level of PCBA processing, some automated equipment has been gradually introduced into the industry. However, although the existing automated spot welding devices can realize basic spot welding functions, there is still much room for improvement in positioning accuracy. They cannot accurately adapt to PCBA products of different sizes and layouts, resulting in the need to frequently adjust equipment parameters when producing different models of products, reducing production efficiency. Moreover, the surface treatment before and after PCBA processing is not perfect, and there is a lack of effective cleaning mechanism. Before spot welding, dust, impurities and other pollutants on the PCBA surface may be mixed into the solder joints, affecting the welding quality; after spot welding, the residual welding slag not only affects the appearance of the product, but may also have adverse effects on its electrical performance and heat dissipation performance. In addition, the treatment of the fume generated during the spot welding process is not ideal, which may cause harm to the working environment and the health of operators, and is also not conducive to the long-term stable operation of the equipment. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an automatic positioning spot welding device suitable for a PCBA processing production line, in order to solve the above-mentioned technical defects.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: an automatic positioning spot welding device adapted to a PCBA processing production line, comprising a frame and a conveyor belt, the top of the frame is rotatably provided with a conveyor belt, the left and right sides of the top of the frame are respectively fixedly provided with a feed processing frame and a discharge processing frame, and a spot welding processing frame is also fixedly provided between the feed processing frame and the discharge processing frame, a fixed frame is also fixedly provided at the middle of the back of the frame, and a spot welding assembly is slidably provided on the front of the fixed frame, a positioning assembly is also provided inside the spot welding processing frame, and a cleaning assembly is provided inside the feed processing frame and the discharge processing frame; The positioning assembly includes a limit frame, a limit frame is slidably arranged at the lower part of the spot welding processing frame, and two micro-electric cylinders are fixedly arranged around the inside of the limit frame, a material discharge plate is movably arranged on the top of the limit frame, and the four sides of the bottom of the material discharge plate are respectively fixedly connected to the top ends of the driving shafts of four micro-electric cylinders, two linear slide rails are fixedly arranged on both sides of the top of the material discharge plate, and limit plates are slidably arranged on the front and rear sides of the tops of the two linear slide rails, and two limit blocks are slidably arranged on the opposite sides of the two limit plates through the electric slide.

[0006] Furthermore, the cleaning component includes a cleaning frame, and movable cover plates are rotatably provided on the rear sides of the tops of the feed processing frame and the discharge processing frame, and cleaning frames are fixedly provided on the bottoms of the two movable cover plates, and cleaning conveyor belts are rotatably provided inside the two cleaning frames, and cleaning brushes are fixedly provided on the surfaces of the two cleaning conveyor belts, suction ports are provided on the front and rear sides of the interior of the cleaning frame, and the interior of the cleaning conveyor belt is driven by a motor built into the cleaning frame.

[0007] Furthermore, a linear slide rail is fixedly provided on the front and rear sides of the inner wall of the feed processing rack, and the right sides of the two linear slide rails pass through the spot welding processing rack and extend to the interior of the discharge processing rack, and a sliding rack is fixedly provided on the opposite side of the two linear slide rails, and a micro electric cylinder is fixedly provided inside the two sliding racks.

[0008] Furthermore, a clamping frame 1 is fixedly provided at the bottom end of the driving shaft of the two micro-electric cylinders on the front and rear sides, and a clamping frame 2 is movably provided between the opposite sides of the two clamping frames 1, and telescopic frames are slidably provided on the front and rear sides inside the two clamping frames 2, and one side of the four telescopic frames is respectively slidably connected to the inside of the two clamping frames 1 on the front and rear sides through an electric slide, and one side of the four telescopic frames is also slidably provided with a clamping plate through an electric slide.

[0009] Furthermore, movable baffles are slidably provided on one side of the inside of the feed processing rack and one side of the inside of the discharge processing rack, and the two movable baffles are both located below the second clamping rack.

[0010] Furthermore, a movable frame is slidably arranged inside the spot welding processing frame and above the linear slide rail 1, and a positioning sliding block is slidably arranged on the top of the movable frame through an electric slide. A positioning frame is fixedly arranged on one side of the positioning sliding block, and a plurality of dust suction ports are arranged inside the positioning frame.

[0011] Furthermore, the spot welding assembly includes a spot welding control frame, a lifting slide is arranged inside the fixed frame, and the spot welding control frame is slidably arranged inside the lifting slide, and adjusting electric cylinders are fixedly arranged on both sides of the fixed frame, and the top ends of the driving shafts of the two adjusting electric cylinders are fixedly connected to the bottom of the spot welding control frame.

[0012] Furthermore, three linear slide rails are fixedly arranged on the front and rear sides inside the spot welding control frame, and a displacement frame is slidably arranged between the two opposite sides of the two linear slide rails, an adjustment block is slidably arranged at the bottom of the displacement frame through an electric slide, and a servo electric cylinder is fixedly arranged on one side of the top of the adjustment block, the driving end of the servo electric cylinder extends to the bottom of the adjustment block, and a welding gun is fixedly arranged at the bottom end of the driving shaft of the servo electric cylinder.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows: 1. The conveyor belt proposed in the present invention realizes the automatic transmission of PCBA, and can orderly convey the PCBA to be processed from the feed end to the bottom of the spot welding component for processing, and then convey it to the discharge end after processing, which greatly improves the production efficiency, reduces the time and workload of manual handling and operation, and ensures the continuity of the processing process; in addition, the surface of the PCBA is cleaned by the feed processing rack before it enters the spot welding processing rack, and dust, impurities and other pollutants on the surface of the PCBA are effectively removed, which is very important for subsequent spot welding processing, because these pollutants may affect the quality of spot welding, such as causing problems such as cold welding and loose solder joints. Pre-cleaning can improve the reliability and stability of spot welding, thereby improving the overall quality of the product; a positioning component is set inside the spot welding processing rack , can accurately position the PCBA to be processed. During the spot welding process, precise positioning can ensure the accuracy of the spot welding position, so that each solder point can be formed according to the predetermined design requirements, avoiding welding defects caused by position deviation, such as solder point offset, welding to parts that should not be welded, etc., ensuring the accuracy and consistency of PCBA processing; finally, the discharge processing rack is used to clean the welding slag after the PCBA spot welding is completed. Welding slag will be generated during the spot welding process. If these welding slags adhere to the surface of the PCBA, it may affect its electrical performance, heat dissipation performance and appearance quality. The cleaning function of the discharge processing rack removes the welding slag in time, so that the PCBA can maintain a good surface state after processing is completed, meet the requirements of subsequent assembly, testing and other processes, and further improve the overall quality of the product.

[0014] 2. By sliding the spot welding components on the fixed frame, the position of the spot welding components can be easily adjusted to meet the processing requirements of PCBAs of different sizes and layouts. This flexibility enables the device to be compatible with various types of PCBA products within a certain range, improves the versatility and applicability of the device, and reduces the cost of replacing equipment due to product changes; cleaning components are set inside the feed processing frame and the discharge processing frame to form a comprehensive cleaning guarantee before and after PCBA processing. Cleaning during feeding creates good conditions for spot welding, and cleaning during discharging protects subsequent processes. This comprehensive cleaning design helps to maintain a clean environment for the entire PCBA processing production line, reduce equipment failures and product quality problems caused by impurity accumulation, extend the service life of the equipment, and reduce maintenance costs and scrap rates during the production process.

[0015] 3. In the present invention, the sliding setting of the limit frame inside the spot welding processing frame and the cooperation between the second micro-electric cylinder inside the limit frame and the discharge plate realize the precise control of the height direction of the PCBA. The second micro-electric cylinder can accurately adjust the height of the discharge plate according to the thickness of the PCBA and the processing requirements, so that the discharge plate and the bottom surface of the PCBA are in perfect contact, which not only ensures the stable placement of the PCBA on the discharge plate, but also does not cause excessive extrusion to the PCBA or affect its flatness in subsequent processing; in addition, an efficient plane positioning system is constructed by the combination of the second linear slide rail on the top of the discharge plate, the limit plate and the limit block. The second linear slide rail provides the sliding of the limit plate. It provides stable and precise guidance, so that the limit plate can be flexibly adjusted in the horizontal direction according to the size of the PCBA. The limit block is set on the limit plate through the sliding of the electric slide, which further enhances the limiting ability around the PCBA. The PCBA can be accurately fixed at the predetermined position on the discharge plate by the all-round plane limit clamping method, effectively preventing the PCBA from displacement or shaking in any direction during the spot welding process. During the spot welding process, even if it is subjected to the force of the welding gun, the PCBA can still maintain a stable position, thereby ensuring the position accuracy of each solder joint and the consistency of welding quality, greatly improving the product yield.

[0016] 4. The positioning frame can be precisely controlled in the spot welding position pre-positioning. According to the PCBA spot welding position data collected and processed in advance, the positioning frame can be quickly and accurately moved to the corresponding position, providing an intuitive reference and positioning benchmark for the spot welding operation of the welding gun, which helps to reduce the positioning error in the spot welding process and improve the efficiency and accuracy of spot welding. When facing PCBAs of different models or layouts, the positioning frame can be quickly adjusted according to the corresponding coordinate data, so that the welding gun can quickly find the correct spot welding position, saving a lot of adjustment time and improving production efficiency; and a number of dust suction ports are set inside the positioning frame and the dust suction pipes and dust suction pipes connected thereto are The pump effectively solves the problem of fume extraction during spot welding. A large amount of fume will be generated during spot welding, which will not only affect the air quality of the working environment, but also may cause harm to the health of operators. At the same time, it may also adhere to the PCBA surface or the inside of the equipment, affecting the normal operation of the equipment and product quality. The dust suction port can absorb the generated fume in time near the spot welding position, transmit it through the dust suction pipe and discharge it to a specific processing device by the dust suction pump. This not only keeps the internal environment of the spot welding processing rack clean, reduces the corrosion and pollution of the equipment by the fume, but also is beneficial to the health and safety of operators, and at the same time provides good environmental conditions for subsequent processing procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the structure of an automatic positioning spot welding device adapted to a PCBA processing production line according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the spot welding control frame and the fixing frame structure according to an embodiment of the present invention; Figure 3 A schematic diagram of a spot welding control frame structure according to an embodiment of the present invention; Figure 4 It is a schematic diagram of a spot welding processing frame and a positioning frame structure according to an embodiment of the present invention; Figure 5 A schematic diagram of the internal structure of a spot welding processing frame according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the internal structure of the feed processing rack according to an embodiment of the present invention.

[0018] In the figure, 1, frame; 2, conveyor belt; 3, fixed frame; 4, spot welding control frame; 5, adjusting electric cylinder; 6, lifting slide; 7, feeding processing frame; 8, spot welding processing frame; 9, discharging processing frame; 10, movable cover plate; 11, cleaning frame; 12, cleaning conveyor belt; 13, suction port; 14, linear slide rail 1; 15, sliding frame; 16, micro electric cylinder 1; 17, clamping frame 1; 18, clamping frame 2; 19, telescopic frame; 20, movable baffle; 21, limit frame; 22, micro electric cylinder 2; 23, discharge plate; 24, linear slide rail 2; 25, limit plate; 26, limit block; 27, movable frame; 28, positioning slide block; 29, positioning frame; 30, linear slide rail 3; 31, displacement frame; 32, adjustment block; 33, servo electric cylinder; 34, welding gun. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] Embodiment 1: See also Figures 1 to 6 As shown, an automatic positioning spot welding device suitable for a PCBA processing production line includes a frame 1 and a conveyor belt 2, the top of the frame 1 is rotatably provided with a conveyor belt 2, the left and right sides of the top of the frame 1 are respectively fixedly provided with a feed processing frame 7 and a discharge processing frame 9, and a spot welding processing frame 8 is also fixedly provided between the feed processing frame 7 and the discharge processing frame 9, a fixed frame 3 is also fixedly provided in the middle of the back of the frame 1, and a spot welding assembly is slidably provided on the front of the fixed frame 3, a positioning assembly is also provided inside the spot welding processing frame 8, and a cleaning assembly is provided inside the feed processing frame 7 and the discharge processing frame 9; It should be noted that when spot welding is performed on the PCBA processing line, the PCBA to be processed is automatically spot welded directly below the spot welding component through the conveyor belt 2. Before the PCBA is spot welded, the surface of the PCBA to be processed is first cleaned by the feed processing rack 7 to ensure the quality of the PCBA in subsequent spot welding. After the cleaning of the PCBA surface is completed, the PCBA is fed into the spot welding processing rack 8 for automatic positioning spot welding. After the automatic positioning spot welding of the PCBA is completed inside the spot welding processing rack 8, the PCBA after spot welding is cleaned of welding slag by the discharge processing rack 9, thereby greatly improving the surface quality of the PCBA after spot welding.

[0022] In a specific embodiment, the conveyor belt 2 proposed in the present invention realizes the automatic transmission of PCBA, and can orderly convey the PCBA to be processed from the feed end to the bottom of the spot welding assembly for processing, and then convey it to the discharge end after processing, which greatly improves the production efficiency, reduces the time and workload of manual handling and operation, and ensures the continuity of the processing process; in addition, the surface of the PCBA is cleaned by the feed processing rack 7 before it enters the spot welding processing rack 8, so as to effectively remove dust, impurities and other pollutants on the surface of the PCBA, which is very important for the subsequent spot welding process, because these pollutants may affect the quality of spot welding, such as causing problems such as cold welding and loose solder joints. By pre-cleaning, the reliability and stability of spot welding can be improved, thereby improving the overall quality of the product; inside the spot welding processing rack 8 A positioning component is provided to accurately position the PCBA to be processed. During the spot welding process, precise positioning can ensure the accuracy of the spot welding position, so that each soldering point can be formed according to the predetermined design requirements, avoiding welding defects caused by position deviation, such as soldering point offset, welding to parts that should not be welded, etc., thereby ensuring the accuracy and consistency of PCBA processing; finally, the discharge processing rack 9 performs welding slag cleaning after the spot welding of the PCBA is completed. Welding slag will be generated during the spot welding process. If these welding slags adhere to the surface of the PCBA, they may affect its electrical performance, heat dissipation performance and appearance quality. The cleaning function of the discharge processing rack 9 removes the welding slag in time, so that the PCBA can maintain a good surface state after processing is completed, meet the requirements of subsequent assembly, testing and other processes, and further improve the overall quality of the product; By slidingly setting the spot welding assembly on the fixed frame 3, the position of the spot welding assembly can be conveniently adjusted to meet the processing requirements of PCBAs of different sizes and layouts. This flexibility enables the device to be compatible with various types of PCBA products within a certain range, improves the versatility and applicability of the device, and reduces the cost of replacing equipment due to product changes in enterprises; cleaning components are set inside the feed processing frame 7 and the discharge processing frame 9, forming a comprehensive cleaning guarantee before and after PCBA processing. Cleaning during feeding creates good conditions for spot welding, and cleaning during discharging protects subsequent processes. This comprehensive cleaning design helps to maintain a clean environment for the entire PCBA processing production line, reduce equipment failures and product quality problems caused by impurity accumulation, extend the service life of the equipment, and reduce maintenance costs and scrap rates in the production process.

[0023] Specifically, the spot welding assembly includes a spot welding control frame 4, a lifting slide 6 is provided inside the fixed frame 3, and the spot welding control frame 4 is slidably provided inside the lifting slide 6, and adjusting electric cylinders 5 are fixedly provided on both sides inside the fixed frame 3, and the top ends of the driving shafts of the two adjusting electric cylinders 5 are fixedly connected to the bottom of the spot welding control frame 4, and linear slide rails 30 are fixedly provided on the front and rear sides inside the spot welding control frame 4, and a displacement frame 31 is slidably provided between the opposite sides of the two linear slide rails 30, and an adjusting block 32 is slidably provided at the bottom of the displacement frame 31 through an electric slide, and a servo electric cylinder 33 is fixedly provided on one side of the top of the adjusting block 32, and the driving end of the servo electric cylinder 33 extends to the bottom of the adjusting block 32, and a welding gun 34 is fixedly provided at the bottom end of the driving shaft of the servo electric cylinder 33; It should be noted that when performing spot welding processing on PCBA, the spot welding control frame 4 is first controlled by the driving end of the lifting slide 6 to slide downward along the inside of the lifting slide 6 until the bottom of the spot welding control frame 4 is matched and connected to the top of the spot welding processing frame 8, and the top of the spot welding processing frame 8 is sealed using the bottom of the spot welding control frame 4. The edge and shape features of the spot welding position image of the PCBA are collected in advance, and the coordinates of the spot welding position in the image coordinate system are calculated based on the extracted edge and shape features. Finally, the coordinates in the image coordinate system are converted into coordinates in the actual device coordinate system to adapt to the operation of the welding gun 34 position adjustment structure, and the converted coordinate data is input into the electric slide at the bottom of the linear slide rail 30 and the displacement frame 31 to realize automatic spot welding positioning of the PCBA, thereby greatly improving the efficiency of automatic spot welding processing of the PCBA.

[0024] Embodiment 2: Specifically, the cleaning component includes a cleaning frame 11, a movable cover plate 10 is rotatably provided on the rear side of the top of the feed processing frame 7 and the discharge processing frame 9, and the bottom of the two movable cover plates 10 is fixedly provided with a cleaning frame 11, the insides of the two cleaning frames 11 are rotatably provided with a cleaning conveyor belt 12, and the surfaces of the two cleaning conveyor belts 12 are fixedly provided with a cleaning brush, the front and rear sides of the inside of the cleaning frame 11 are provided with a suction port 13, and the inside of the cleaning conveyor belt 12 is driven by a motor built into the cleaning frame 11; Furthermore, the front and rear sides of the inner wall of the feed processing frame 7 are fixedly provided with linear slide rails 14, and the right sides of the two linear slide rails 14 penetrate the spot welding processing frame 8 and extend to the inside of the discharge processing frame 9, the two linear slide rails 14 are fixedly provided with sliding frames 15 on the opposite sides, and the insides of the two sliding frames 15 are fixedly provided with micro-electric cylinders 16, and the bottom ends of the driving shafts of the two micro-electric cylinders 16 on the front and rear sides are fixedly provided with clamping frames 17, and the two clamping frames 17 are movably provided between the opposite sides. The two clamping racks 18 are each provided with telescopic racks 19 on the front and rear sides thereof, and one side of the four telescopic racks 19 is respectively connected to the interior of the two clamping racks 17 on the front and rear sides by an electric slide, and one side of the four telescopic racks 19 is also provided with a clamping plate by an electric slide; wherein, two sliding racks 15 are also provided on one side of the two linear slide rails 14 inside the discharging processing rack 9, and the two sliding racks 15 inside the discharging processing rack 9 are used to perform discharging processing on the PCBA.

[0025] Furthermore, a movable baffle 20 is slidably provided on one side of the inside of the feed processing rack 7 and one side of the inside of the discharge processing rack 9, and the two movable baffles 20 are both located below the clamping rack 18; It should be noted that before spot welding of PCBA, the PCBA to be processed is sent to the bottom of the feeding processing rack 7 by the conveyor belt 2. At this time, the movable baffle 20 is controlled by the electrical parts to slide to the left. At this time, the two micro-electric cylinders 16 driving ends inside the sliding rack 15 are used to drive the clamping rack 17 to move downward until the bottoms of the two clamping racks 17 are in contact with the top of the conveyor belt 2. At this time, the telescopic racks 19 on both sides of the clamping rack 17 are controlled to slide to both sides of the PCBA until the two clamping racks 18 on opposite sides are fitted and clamped on both sides of the PCBA, and the four clamping racks 18 on one side are used to clamp the two side surfaces of the PCBA. The clamping plates are used to fit and clamp the front and rear sides of the PCBA, and finally the driving end of the micro-electric cylinder 16 is controlled to control the clamping frame 17 to lift, and the clamped PCBA is sent into the inside of the feeding processing frame 7 until the spot welding surface of the PCBA contacts the bottom surface of the cleaning brush provided on the cleaning conveyor belt 12, and the cleaning conveyor belt 12 is controlled to rotate inside the cleaning frame 11, and the spot welding surface of the PCBA is cleaned by the cleaning brush on the surface of the cleaning conveyor belt 12, and the dust generated by the cleaning is extracted in combination with the two suction ports 13 on the front and rear sides of the bottom of the cleaning frame 11, so as to ensure the subsequent spot welding quality of the spot welding surface of the PCBA.

[0026] Embodiment 3: Specifically, the positioning component includes a limit frame 21, a limit frame 21 is slidably arranged at the lower part of the spot welding processing frame 8, and micro-electric cylinders 22 are fixedly arranged around the limit frame 21, a feed plate 23 is movably arranged on the top of the limit frame 21, and the four sides of the bottom of the feed plate 23 are respectively fixedly connected to the top ends of the driving shafts of the four micro-electric cylinders 22, and linear slide rails 24 are fixedly arranged on both sides of the top of the feed plate 23, and limit plates 25 are slidably arranged on the front and rear sides of the tops of the two linear slide rails 24, and two limit blocks 26 are slidably arranged on the opposite sides of the two limit plates 25 through an electric slide; wherein the limit frame 21 is arranged below the linear slide rail 14, and a heating wire is arranged inside the limit plate 25, and the PCBA is preheated before the spot welding process by the heating wire arranged inside the limit plate 25, and a spot welding chamber is also arranged above the spot welding processing frame 8.

[0027] Furthermore, a movable frame 27 is slidably disposed inside the spot welding processing frame 8 and above the linear slide rail 14, and a positioning slide block 28 is slidably disposed on the top of the movable frame 27 through an electric slide. A positioning frame 29 is fixedly disposed on one side of the positioning slide block 28, and a plurality of dust suction ports are disposed inside the positioning frame 29; the interiors of the plurality of dust suction ports are connected through dust suction pipes and dust suction pumps, and the movable frame 27 is located in the middle of the interior of the spot welding chamber; It should be noted that after the cleaning process of the spot welding surface of the PCBA is completed, the two sliding frames 15 are controlled by the linear slide rail 14 to slide from the inside of the feeding processing frame 7 to the inside of the spot welding processing frame 8 until the PCBA is directly above the discharge plate 23, and the four micro-electric cylinders 22 driving ends inside the limit frame 21 are used to control the discharge plate 23 to move upward until the upper end surface of the discharge plate 23 contacts the bottom surface of the PCBA. At this time, the PCBA is placed on the upper end surface of the discharge plate 23, and then the sliding frame 15 is controlled to move from the inside of the spot welding processing frame 8 to the inside of the feeding processing frame 7, and the PCBA is continuously automatically picked up and the spot welding surface is cleaned; At the top of the discharge plate 23, two limit blocks 26 are used to control the limit plate 25 and the limit blocks 26 on one side of the two limit plates 25 to limit and clamp the four sides of the PCBA to ensure the stability of the PCBA during the spot welding process. Then, the discharge plate 23 is controlled to be lifted upward by the driving end of the micro-electric cylinder 22, and the spot welding chamber inside the spot welding processing frame 8 is sealed at the bottom by the four sides of the surface of the discharge plate 23. The position of the positioning frame 29 is adjusted according to the spot welding position of the PCBA, and the spot welding position is pre-positioned by the positioning frame 29. At the same time, the smoke generated during the spot welding process is extracted, and then the converted coordinate data is input into the linear guide rail 30 and In the electric slide at the bottom of the displacement frame 31, the spot welding automatic positioning of the PCBA is realized, and the driving end of the servo electric cylinder 33 is used to control the welding gun 34 to automatically spot weld the spot welding position of the PCBA. After the electric welding process on the surface of the PCBA is completed, the discharge plate 23 is controlled to move downward, and the clamping frame 17 and the clamping frame 2 18 inside the discharge processing frame 9 are cooperated to transfer the PCBA after the spot welding process from the inside of the spot welding processing frame 8 to the inside of the discharge processing frame 9. Inside the discharge processing frame 9, the cleaning conveyor belt 12 is used to automatically clean the spot welding surface of the PCBA after the spot welding process, so as to realize automatic cleaning of the welding slag on the spot welding surface of the PCBA.

[0028] In a specific embodiment, the present invention realizes precise control of the height direction of PCBA by the sliding setting of the limit frame 21 inside the spot welding processing frame 8 and the cooperation between the micro-electric cylinder 22 and the discharge plate 23 inside the limit frame 21. The micro-electric cylinder 22 can accurately adjust the height of the discharge plate 23 according to the thickness of the PCBA and the processing requirements, so that the discharge plate 23 is in perfect contact with the bottom surface of the PCBA, which not only ensures the stable placement of the PCBA on the discharge plate 23, but also does not cause excessive extrusion to the PCBA or affect its flatness in subsequent processing; in addition, through the combination of the linear slide rail 24 on the top of the discharge plate 23 and the limit plate 25 and the limit block 26, an efficient plane positioning system is constructed. The second 24 provides a stable and precise guide for the sliding of the limit plate 25, so that the limit plate 25 can be flexibly adjusted in the horizontal direction according to the size of the PCBA. The limit block 26 is set on the limit plate 25 by the sliding of the electric slide, which further enhances the limiting ability of the PCBA around. The PCBA can be accurately fixed at a predetermined position on the discharge plate 23 by using a full range of plane limit clamping methods, effectively preventing the PCBA from displacement or shaking in any direction during the spot welding process. During the spot welding process, even if it is subjected to the force of the welding gun 34, the PCBA can still maintain a stable position, thereby ensuring the position accuracy of each solder joint and the consistency of the welding quality, greatly improving the product yield rate; The positioning frame 29 can be moved to the corresponding position quickly and accurately according to the PCBA spot welding position data collected and processed in advance in terms of spot welding position pre-positioning by precisely controlling its position, providing an intuitive reference and positioning benchmark for the spot welding operation of the welding gun 34, which helps to reduce the positioning error during the spot welding process and improve the efficiency and accuracy of spot welding. When facing PCBAs of different models or layouts, the positioning frame 29 can be quickly adjusted according to the corresponding coordinate data, so that the welding gun 34 can quickly find the correct spot welding position, saving a lot of adjustment time and improving production efficiency; and a plurality of dust suction ports arranged inside the positioning frame 29 and the dust suction ports connected thereto are arranged inside the positioning frame 29. The pipe and the dust suction pump effectively solve the problem of fume extraction during the spot welding process. A large amount of fume will be generated during the spot welding process. These fumes will not only affect the air quality of the working environment, but also may cause harm to the health of the operators. At the same time, they may also adhere to the PCBA surface or the inside of the equipment, affecting the normal operation of the equipment and product quality. The dust suction port can absorb the generated fume in time near the spot welding position, transmit it through the dust suction pipe and discharge it to a specific processing device by the dust suction pump. This not only keeps the internal environment of the spot welding processing rack 8 clean, reduces the corrosion and pollution of the equipment by the fume, but also is beneficial to the health and safety of the operators, and at the same time provides good environmental conditions for subsequent processing procedures.

[0029] Embodiment 4: Specifically, this embodiment also discloses a spot welding method of an automatic positioning spot welding device adapted for a PCBA processing production line, comprising the following steps: Step 1: Before spot welding of PCBA, the PCBA to be processed is sent to the bottom of the feeding processing rack 7 through the conveyor belt 2. At this time, the movable baffle 20 is controlled by the electrical parts to slide to the left. At this time, the driving ends of the two micro-electric cylinders 16 inside the sliding rack 15 are used to drive the clamping rack 17 to move downward until the bottoms of the two clamping racks 17 are in contact with the top of the conveyor belt 2. At this time, the telescopic racks 19 on both sides of the clamping rack 17 are controlled to slide to both sides of the PCBA until the opposite sides of the two clamping racks 18 fit and clamp the two side surfaces of the PCBA, and cooperate with the clamping plates on one side of the four clamping racks 18 to fit and clamp the front and back sides of the PCBA. Finally, the driving end of the micro-electric cylinder 16 is controlled to control the clamping rack 17 to lift, and the clamped PCBA is sent into the inside of the feeding processing rack 7. Step 2: Control the spot welding surface of the PCBA to contact the bottom surface of the cleaning brush provided on the cleaning conveyor belt 12, control the cleaning conveyor belt 12 to rotate inside the cleaning frame 11, use the cleaning brush on the surface of the cleaning conveyor belt 12 to clean the spot welding surface of the PCBA, and combine the two suction ports 13 on the front and rear sides of the bottom of the cleaning frame 11 to extract the dust generated by cleaning; Step 3: After the spot welding surface of the PCBA is cleaned, the two sliding frames 15 are controlled by the linear slide rail 14 to slide from the inside of the feeding processing frame 7 to the inside of the spot welding processing frame 8 until the PCBA is directly above the discharge plate 23, and the four micro-electric cylinders 22 driving ends inside the limit frame 21 are used to control the discharge plate 23 to move upward until the upper end surface of the discharge plate 23 contacts the bottom surface of the PCBA. At this time, the PCBA is placed on the upper end surface of the discharge plate 23, and then the sliding frame 15 is controlled to move from the inside of the spot welding processing frame 8 to the inside of the feeding processing frame 7, and the PCBA is continuously automatically picked up and the spot welding surface is cleaned; Step 4: At the top of the discharge plate 23, two limit blocks 26 are used to control the limit plate 25 and the limit blocks 26 on one side of the two limit plates 25 to limit and clamp the four sides of the PCBA to ensure the stability of the PCBA during the spot welding process. Then, the discharge plate 23 is lifted upward by the driving end of the micro electric cylinder 22, and the spot welding chamber inside the spot welding processing frame 8 is sealed at the bottom by the four sides of the surface of the discharge plate 23. The position of the positioning frame 29 is adjusted according to the spot welding position of the PCBA, and the spot welding position is pre-positioned by the positioning frame 29. At the same time, the smoke generated during the spot welding process is extracted, and then the converted coordinate data is input into the electric slide at the bottom of the linear slide rail 30 and the displacement frame 31 to realize the automatic spot welding positioning of the PCBA, and the driving end of the servo electric cylinder 33 is used to control the welding gun 34 to automatically spot weld the spot welding position of the PCBA; Step 5, after completing the electric welding process on the PCBA surface, control the discharge plate 23 to move downward, cooperate with the clamping frame 17 and the clamping frame 2 18 inside the discharge processing frame 9 to transfer the PCBA after the spot welding process from the inside of the spot welding processing frame 8 to the inside of the discharge processing frame 9, and inside the discharge processing frame 9, use the cleaning conveyor belt 12 to automatically clean the spot welding surface of the PCBA after the spot welding process, so as to automatically clean the welding slag on the spot welding surface of the PCBA.

[0030] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic positioning spot welding device suitable for a PCBA processing production line, comprising a frame (1) and a conveyor belt (2), wherein the top of the frame (1) is rotatably provided with a conveyor belt (2), characterized in that: A feeding processing frame (7) and a discharging processing frame (9) are fixedly arranged on the left and right sides of the top of the frame (1), and a spot welding processing frame (8) is fixedly arranged between the feeding processing frame (7) and the discharging processing frame (9). A fixing frame (3) is fixedly arranged in the middle of the back of the frame (1), and a spot welding assembly is slidably arranged on the front of the fixing frame (3). A positioning assembly is also arranged inside the spot welding processing frame (8), and cleaning assemblies are arranged inside the feeding processing frame (7) and the discharging processing frame (9); The positioning assembly comprises a limit frame (21), the limit frame (21) is slidably arranged at the lower part of the spot welding processing frame (8), and micro-electric cylinders (22) are fixedly arranged around the limit frame (21), a material discharge plate (23) is movably arranged at the top of the limit frame (21), and the four sides of the bottom of the material discharge plate (23) are respectively fixedly connected to the top ends of the driving shafts of the four micro-electric cylinders (22), two linear slide rails (24) are fixedly arranged on both sides of the top of the material discharge plate (23), and limit plates (25) are slidably arranged on the front and rear sides of the tops of the two linear slide rails (24), and two limit blocks (26) are slidably arranged on the opposite sides of the two limit plates (25) through an electric slide.

2. The automatic positioning spot welding device adapted to the PCBA processing production line according to claim 1 is characterized in that: The cleaning component comprises a cleaning frame (11), a movable cover plate (10) is rotatably provided on the rear side of the top of the feed processing frame (7) and the discharge processing frame (9), and a cleaning frame (11) is fixedly provided on the bottom of the two movable cover plates (10), a cleaning conveyor belt (12) is rotatably provided inside the two cleaning frames (11), and a cleaning brush is fixedly provided on the surface of the two cleaning conveyor belts (12), a suction port (13) is provided on the front and rear sides of the interior of the cleaning frame (11), and the interior of the cleaning conveyor belt (12) is driven to rotate by a motor built into the cleaning frame (11).

3. The automatic positioning spot welding device adapted to the PCBA processing production line according to claim 1 is characterized in that: The front and rear sides of the inner wall of the feed processing frame (7) are fixedly provided with linear slide rails (14), and the right sides of the two linear slide rails (14) penetrate the spot welding processing frame (8) and extend to the inside of the discharge processing frame (9), and the opposite sides of the two linear slide rails (14) are fixedly provided with sliding frames (15), and the insides of the two sliding frames (15) are fixedly provided with micro electric cylinders (16).

4. The automatic positioning spot welding device adapted to the PCBA processing production line according to claim 3 is characterized in that: A material clamping frame (17) is fixedly provided at the bottom end of the driving shaft of the two micro-electric cylinders (16) on the front and rear sides, and a material clamping frame (18) is movably provided between the two opposite sides of the two material clamping frames (17). Telescopic frames (19) are slidably provided on the front and rear sides of the two material clamping frames (18), and one side of the four telescopic frames (19) is respectively connected to the inside of the two material clamping frames (17) on the front and rear sides through an electric slide, and one side of the four telescopic frames (19) is also slidably provided with a clamping plate through an electric slide.

5. The automatic positioning spot welding device adapted to the PCBA processing production line according to claim 4 is characterized in that: A movable baffle (20) is slidably provided on one side of the interior of the feed processing frame (7) and one side of the interior of the discharge processing frame (9), and the two movable baffles (20) are both located below the second clamping frame (18).

6. The automatic positioning spot welding device adapted to the PCBA processing production line according to claim 3 is characterized in that: A movable frame (27) is slidably disposed inside the spot welding processing frame (8) and above the first linear slide rail (14), and a positioning sliding block (28) is slidably disposed on the top of the movable frame (27) via an electric slide. A positioning frame (29) is fixedly disposed on one side of the positioning sliding block (28), and a plurality of dust suction ports are disposed inside the positioning frame (29).

7. The automatic positioning spot welding device adapted to the PCBA processing production line according to claim 1 is characterized in that: The spot welding assembly comprises a spot welding control frame (4), a lifting slide groove (6) is arranged inside the fixed frame (3), and the spot welding control frame (4) is slidably arranged inside the lifting slide groove (6), and adjustment electric cylinders (5) are fixedly arranged on both sides inside the fixed frame (3), and the top ends of the driving shafts of the two adjustment electric cylinders (5) are fixedly connected to the bottom of the spot welding control frame (4).

8. The automatic positioning spot welding device adapted to the PCBA processing production line according to claim 7 is characterized in that: The front and rear sides of the spot welding control frame (4) are both fixedly provided with linear slide rails (30), and a displacement frame (31) is slidably provided between the two opposite sides of the linear slide rails (30), an adjustment block (32) is slidably provided at the bottom of the displacement frame (31) via an electric slide, and a servo electric cylinder (33) is fixedly provided on one side of the top of the adjustment block (32), a driving end of the servo electric cylinder (33) extends to the bottom of the adjustment block (32), and a welding gun (34) is fixedly provided at the bottom end of the driving shaft of the servo electric cylinder (33).

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