Automatic welding equipment for circuit board

Abstract

The invention relates to the technical field of automatic assembly, and discloses automatic circuit board welding equipment which comprises a welding mechanism, a clamping mechanism and a driving mechanism, the welding mechanism is provided with a wave soldering station, and the wave soldering station is used for conducting wave soldering on a passing circuit board; the driving mechanism comprises a driving belt, a guide rail, a driving part and a fixing frame, at least part of the fixing frame is located above the wave soldering station, the driving belt is arranged on the outer surface of the fixing frame in a sleeving mode, and the driving part is arranged on the guide rail. According to the automatic welding equipment for the circuit board, the driving belt and the guide rail are adopted for cooperative transmission, the guide rail and the driving belt are rigidly connected through the fixing frame, and a closed conveying groove is formed; the inner surface part of the guide rail and the outer surface of the driving belt form a guide space for the clamping mechanism to move along with the driving belt inside, and meanwhile rigid support is formed by means of the guide rail.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic welding, in particular to a circuit board automatic welding equipment. BACKGROUND

[0002] At present, with the rapid development of electronic information industry, the processing quality and production efficiency of circuit board as the core component of electronic equipment directly affect the performance and cost of terminal product, and wave soldering is a key process in the processing of circuit board, which is mainly used for welding electronic components to the circuit board, and its process stability and production continuity are crucial to the overall quality and production efficiency of the circuit board.

[0003] Wave soldering forms a "wave peak" by molten solder, which is usually generated by a pump or nozzle, when the circuit board passes through the wave peak at a certain angle and speed, the solder contacts the pads and component pins on the circuit board to achieve electrical connection.

[0004] In the prior art, according to the size and shape of the circuit board, a suitable tool fixture is installed, the prepared circuit board is placed on the conveyor belt of the wave soldering, and the circuit board is conveyed into the wave soldering equipment for wave soldering, but when the circuit board is directly placed on the conveyor belt for conveying, since the conveyor belt is conveyed by chain transmission or belt transmission, periodic transverse vibration will occur when the running speed is greater than or equal to 1.2m / s due to the existence of chain hinge gap and sprocket indexing error, and longitudinal shaking or vertical floating will be easily caused under variable speed conditions due to elastic sliding and tension force wave, which will cause displacement or position deviation of the circuit board during conveying, and when the conveying accuracy of the circuit board is affected, it will cause quality problems such as wave soldering position deviation and virtual welding, thereby affecting the final welding quality and service life of the circuit board. SUMMARY

[0005] The present application provides a circuit board automatic welding equipment, which can reduce vibration and shaking of the circuit board during welding to reduce quality problems such as welding position deviation and virtual welding.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme: A circuit board automatic welding equipment is designed, which comprises a welding mechanism, a clamping mechanism and a driving mechanism, wherein: The welding mechanism is provided with a wave soldering station, and the wave soldering station is used for wave soldering of the passing circuit board. The driving mechanism comprises a driving belt, a guide rail, a driving part and a fixing frame located above the wave soldering station at least partially, the driving belt is sleeved on the outer surface of the fixing frame, the driving part is arranged on the guide rail and used to drive the driving belt to run, the guide rail is fixedly connected to the fixing frame and located outside the driving belt at least partially, and a conveying groove is formed between the part of the guide rail located outside the driving belt and the driving belt. The clamping mechanism is arranged in the conveying groove at least partially, the clamping mechanism is used to bear and fix the circuit board, and the part of the clamping mechanism located in the conveying groove moves in the conveying groove driven by the driving belt, so that the circuit board is welded by the wave soldering station.

[0007] Optionally, the supporting mechanism comprises a supporting frame, a plurality of supporting legs and a plurality of pads, the supporting frame is fixedly installed on the inner side wall of the fixing frame, the plurality of supporting legs are respectively fixedly installed on the outer wall of the supporting frame, the plurality of pads are respectively fixedly installed on the outer wall of the plurality of supporting legs, and the top of the plurality of pads is respectively fixedly connected to the bottom of the guide rail.

[0008] Optionally, the driving part comprises a plurality of driving wheels and a first motor, the plurality of driving wheels are respectively rotationally connected to the outer edge of the fixing frame, the first motor is fixedly installed on the outer wall of the fixing frame, and the output end is in transmission connection with the outer wall of one part of the driving wheels through a key, and the driving belt is in transmission connection with the outer wall of the plurality of driving wheels.

[0009] Optionally, the clamping mechanism comprises a bracket, a plurality of positioning shafts and a plurality of rollers, the plurality of positioning shafts are respectively fixedly installed on the two sides of the outer surface of the bracket, the plurality of rollers correspond to the plurality of positioning shafts, the rollers are rotationally connected to the outer surface of the corresponding positioning shafts, the plurality of rollers are located in the conveying groove, and the outer circular surface is in contact with the surface of the driving belt and the inner side wall of the guide rail.

[0010] Optionally, the clamping mechanism further comprises four first hydraulic rods, two guide seats and four end covers, the four first hydraulic rods are respectively fixedly installed on the outer wall of the bracket, the two guide seats are respectively fixedly installed on the output ends of the four first hydraulic rods, and the four end covers are respectively fixedly installed on the two ends of the two guide seats.

[0011] Optionally, the clamping mechanism further comprises two second motors, two threaded rods and four adjusting seats, the two second motors are respectively fixedly installed on the outer wall of the two end covers, the two threaded rods are respectively rotationally connected to the inner side wall of the two guide seats, the four adjusting seats are respectively slidably connected to the outer wall of the two guide seats, and the outer wall of the four adjusting seats is respectively in threaded connection with the outer surface of the two threaded rods.

[0012] Optionally, the clamping mechanism further comprises four second hydraulic rods, four clamping plates, a plurality of sliding grooves, a plurality of limiting sheets and a plurality of fastening bolts, the four second hydraulic rods are respectively fixedly installed at the top of the four adjusting seats, the output ends of the four second hydraulic rods are respectively fixedly installed at the top of the four clamping plates, the plurality of sliding grooves are respectively arranged below the four clamping plates, the plurality of limiting sheets are respectively slidably connected to the inner side walls of the plurality of sliding grooves, and the plurality of fastening bolts are respectively threadedly arranged at the top of the four clamping plates, and one end of the fastening bolt penetrating into the sliding groove abuts against the top of the limiting sheet.

[0013] Optionally, the conveying mechanism further comprises a mounting frame, a plurality of supporting feet, three first driven rollers, three second driven rollers, three driving rollers and a third motor, the outer surfaces of the two sides of the mounting frame are respectively fixedly connected with the outer surfaces of the plurality of supporting feet, the three first driven rollers are respectively rotatably connected to one end of the mounting frame, the three second driven rollers are respectively rotatably connected to the inner wall of the mounting frame and located on one side of the three first driven rollers, the three driving rollers are rotatably connected to the other end of the mounting frame, and the third motor is fixedly installed on the outer wall of the mounting frame, and one end of the output end of the third motor penetrating into the mounting frame is in key transmission connection with the end portions of the three driving rollers.

[0014] Optionally, the conveying mechanism further comprises a first conveying belt and two second conveying belts, the first conveying belt is arranged below the two fixing frames and the top of the first conveying belt is flush with the lower plane of the clamping mechanism, and the two second conveying belts are respectively arranged on the two sides of the first conveying belt and the end portions of the two second conveying belts are lower than the lower plane of the clamping mechanism.

[0015] Optionally, the welding mechanism comprises a wave soldering machine and a solder pool, the wave soldering machine is arranged below the clamping mechanism, the solder pool is arranged above the wave soldering machine, and the wave soldering station is arranged on the solder pool.

[0016] The present application provides a circuit board automatic welding device, which has the following advantages: The line board automatic welding equipment adopts driving belt and guide rail cooperative transmission, the guide rail and the driving belt are rigidly connected through the fixing frame to form a closed conveying groove, when the driving part drives the driving belt to run uniformly along the outer edge of the fixing frame, the fixing frame can rigidly support the driving belt to avoid the bending or floating of the driving belt, and the inner surface of the guide rail forms a guide space with the outer surface of the driving belt to move the clamping mechanism inside the driving belt, and the rigid support formed by the guide rail can form a rigid support plane on the moving path of the clamping mechanism, which can avoid the shaking or floating of the belt transmission due to elastic sliding and tension force wave, reduce the vibration of the clamping mechanism in the moving process, and the structure of the flexible transmission belt combined with the rigid guide rail can effectively inhibit the periodic transverse vibration during operation and the longitudinal shaking under variable speed working condition, so that the line board can smoothly pass through the welding station, and the influence of vibration and shaking on the pin foot welding of the line board is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall mounting structure of the application; Figure 2 It is a schematic diagram of the cooperation structure of the driving mechanism and the clamping mechanism of the application; Figure 3 It is a schematic diagram of the mounting structure of the supporting mechanism of the application; Figure 4 It is a schematic diagram of the driving mechanism structure of the application; Figure 5 It is a schematic diagram of the cross-section structure of the driving belt and the guide rail of the application; Figure 6 It is a schematic diagram of the clamping mechanism structure of the application; Figure 7 It is a schematic diagram of the explosion structure of the clamping mechanism of the application; Figure 8 It is a schematic diagram of the explosion structure of the clamping plate of the application; Figure 9 It is a schematic diagram of the bottom structure of the clamping mechanism of the application; Figure 10 It is a schematic diagram of the wave soldering machine structure of the application; Figure 11 It is a schematic diagram of the conveying mechanism structure of the application; Figure 12 It is a schematic diagram of the first driven roller and the driving roller mounting structure of the application.

[0018] In the figure: 1. Support mechanism; 101. Support frame; 102. Support leg; 103. Pad; 2. Drive mechanism; 201. Fixed frame; 202. Drive wheel; 203. First motor; 204. Drive belt; 205. Guide rail; 3. Clamping mechanism; 301. Bracket; 302. Positioning shaft; 303. Roller; 304. First hydraulic rod; 305. Guide seat; 306. End cover; 307. Second motor; 308. Threaded rod; 309 , adjusting seat; 3010, second hydraulic rod; 3011, splint; 3012, slide; 3013, limit plate; 3014, fastening bolt; 4, conveying mechanism; 401, mounting frame; 402, supporting foot; 403, first driven roller; 404, second driven roller; 405, driving roller; 406, third motor; 407, first conveyor belt; 408, second conveyor belt; 5, welding mechanism; 501, wave soldering machine; 502, solder pool. DETAILED DESCRIPTION

[0019] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative work shall fall within the scope of protection of the present invention.

[0020] See also Figures 1 to 12 An embodiment of the present invention provides a soldering device for use in wave soldering circuit boards. By improving the structure of the soldering device, the device achieves the advantages of continuous conveyance and stable clamping of circuit boards without requiring frequent downtime for disassembly. Specifically, taking wave soldering of circuit boards as an example, the soldering device is preferably an automatic circuit board soldering device, capable of stable conveyance of circuit boards without requiring downtime for disassembly.

[0021] See also Figures 1 to 12 The present invention provides a technical solution: an automatic soldering device for a circuit board, which is applied to the scenario where the circuit board is soldered during wave soldering.

[0022] The circuit board automatic welding equipment includes a welding mechanism 5, a clamping mechanism 3 and a driving mechanism 2, wherein: The welding mechanism 5 is provided with a wave soldering station, which is used to perform wave soldering on the circuit boards passing through; The driving mechanism 2 comprises a driving belt 204, a guide rail 205, a driving part and a fixing frame 201 located at least partially above the wave soldering station, the driving belt 204 is sleeved on the outer surface of the fixing frame 201, the driving part is arranged on the guide rail 205 and used to drive the driving belt 204 to run, the guide rail 205 is fixedly connected to the fixing frame 201 and located at least partially outside the driving belt 204, and a conveying groove is formed between the part of the guide rail 205 located outside the driving belt 204 and the driving belt 204; The clamping mechanism 3 is arranged at least partially in the conveying groove and used to bear and fix the circuit board, and the part of the clamping mechanism 3 located in the conveying groove moves in the conveying groove driven by the driving belt 204, so that the bearing circuit board passes through the wave soldering station for welding.

[0023] In this embodiment, the fixed frame 201 is used as the support frame of the driving mechanism 2, and the driving wheel 202, the first motor 203 and other components are fixedly installed and connected with the support frame 101 of the support mechanism 1, so as to ensure the installation position accuracy of the driving wheel 202, maintain the tension and running track stability of the driving belt 204, and rotate the driving wheel 202 to the outer edge of the fixed frame 201. Part of the driving wheel 202 is driven by the first motor 203 through key transmission, and the rest is a driven wheel, which supports and guides the movement of the driving belt 204 together. Through multi-wheel cooperative transmission, the slip and deviation of the driving belt 204 are reduced, the transmission stability is ensured, the continuity and precision of the circuit board conveying are improved, the first motor 203 is fixedly installed on the outer wall of the fixed frame 201, the output end is connected with part of the driving wheel 202, and the power for the movement of the driving belt 204 is provided. Through the stable speed control of the motor, the uniform motion of the driving belt 204 is realized, the circuit board passes through the wave soldering area at a constant speed, the welding quality is stable, the driving belt 204 is transmission connected to the outer wall of the plurality of driving wheels 202, and the guide rail 205 is matched to clamp the clamping mechanism 3. Through the movement of the driving belt 204, the clamping mechanism 3 is driven to move synchronously. Compared with the traditional chain or simple belt transmission, the driving belt 204 and the guide rail 205 form a closed clamping space, the shaking and vibration of the clamping mechanism 3 are reduced, the conveying stability is improved, the welding position deviation and the risk of virtual welding are reduced, the guide rail 205 is arranged outside the driving belt 204 and is fixed relative to the fixed frame 201, and serves as the movement track of the clamping mechanism 3. Through the rigid constraint of the guide rail 205, the transverse displacement of the clamping mechanism 3 is limited, the stable movement of the clamping mechanism 3 along the predetermined track is ensured, and the conveying precision is further improved. The inner surface of the guide rail 205 forms a guide space with the outer surface of the driving belt 204, the clamping mechanism 3 moves in the guide space, and the guide rail 205 forms a rigid support. Thus, a rigid support plane is formed on the path of the clamping mechanism 3, the shaking of the belt transmission due to elastic sliding and tension force wave is avoided, the vibration of the clamping mechanism 3 in the displacement process is reduced, and the structure that the flexible transmission belt is combined with the rigid guide rail 205 can effectively suppress the periodic transverse vibration during operation and the longitudinal shaking under variable speed working conditions, so as to ensure that the circuit board passes through the welding station stably and avoid the influence of vibration and shaking on the welding of the pins of the circuit board.

[0024] In the above embodiment, as a preferred solution, the support mechanism 1 comprises a support frame 101, a plurality of support legs 102 and a plurality of pads 103, the support frame 101 is fixedly installed on the inner side wall of the fixed frame 201, the plurality of support legs 102 are respectively fixedly installed on the outer wall of the support frame 101, and the plurality of pads 103 are respectively fixedly installed on the outer wall of the plurality of support legs 102, and the top of the plurality of pads 103 is respectively fixedly connected with the bottom of the guide rail 205.

[0025] In the above embodiment, as a preferred solution, the drive part comprises a plurality of drive wheels 202 and a first motor 203, the plurality of drive wheels 202 are respectively rotatably connected to the outer edge of the fixed frame 201, the plurality of first motors 203 are respectively fixedly installed on the outer wall of the fixed frame 201, and the output end is connected with the outer wall of one of the drive wheels 202 through a key transmission, the drive belt 204 is transmissionally connected to the outer wall of the plurality of drive wheels 202, the support frame 101 is taken as the core frame of the equipment, is fixedly installed on the inner side wall of the fixed frame 201 of the drive mechanism 2, provides an installation basis and overall support for the drive mechanism 2, the clamping mechanism 3 and the like, ensures the position accuracy of each functional module, maintains the stability of the overall structure of the equipment, avoids affecting the PCB conveying and welding precision due to the frame shaking, the support leg 102 is fixedly installed on the outer wall of the support frame 101, supports the equipment on the ground or workbench, bears the overall weight of the equipment, disperses the weight of the equipment, enhances the connection stability of the equipment and the ground, prevents displacement or inclination of the equipment during operation, the pad 103 is fixedly installed on the outer wall of the support leg 102, and the top is fixedly connected with the bottom of the guide rail 205, so as to ensure the height and relative position of the guide rail 205 and provide accurate guidance for the stable operation of the clamping mechanism 3.

[0026] In the above embodiment, as a preferred solution, the clamping mechanism 3 comprises a bracket 301, a plurality of positioning shafts 302 and a plurality of rollers 303, the plurality of positioning shafts 302 are respectively fixedly installed on the outer surface of the bracket 301 on both sides, the plurality of rollers 303 correspond to the plurality of positioning shafts 302, the roller 303 is rotatably connected to the outer surface of the corresponding positioning shaft 302, the plurality of rollers 303 are located in the conveying groove, and the outer circular surface is in contact with the surface of the driving belt 204 and the inner side wall of the guide rail 205. Through the bracket 301 as the basic frame of the clamping mechanism 3, the positioning shaft 302, the first hydraulic rod 304 and other components are fixedly installed, the circuit board is carried and the movement is transmitted, a stable mounting platform is provided, the relative position accuracy of each functional component is ensured, the reliability of the circuit board clamping and conveying is ensured, the positioning shaft 302 is fixed on both sides of the bracket 301, the roller 303 is rotatably connected to the positioning shaft 302, and the outer surface of the driving belt 204 and the inner side wall of the guide rail 205 are in contact. The roller 303 reduces the resistance between the clamping mechanism 3 and the driving belt 204 and the guide rail 205 through rolling friction, ensures that the clamping mechanism 3 moves stably with the driving belt 204, and further improves the movement accuracy through the guiding effect of the roller 303. Among them, the surface between the roller 303 and the driving belt 204 and the guide rail 205 is interference connection, that is, the outer circular surface of the roller 303 located in the conveying groove is interference connected with the groove wall of the conveying groove.

[0027] In the above embodiment, as a preferred solution, the clamping mechanism 3 further comprises four first hydraulic rods 304, two guide seats 305 and four end covers 306, the four first hydraulic rods 304 are respectively fixedly installed on the outer wall of the bracket 301, the two guide seats 305 are respectively fixedly installed on the output ends of the four first hydraulic rods 304 on both sides of the outer wall, and the four end covers 306 are respectively fixedly installed on both ends of the two guide seats 305. The first hydraulic rod 304 is fixed to the bracket 301, the output end is connected to the guide seat 305, the distance between the guide seats 305 is adjusted through hydraulic drive, different sizes of circuit boards are adapted, rapid self-adaptive adjustment of the width of the circuit board is realized, manual adjustment is not required, the versatility and production efficiency of the equipment are improved, and the stability of the hydraulic drive is ensured. The clamping force is uniform.

[0028] In the above embodiment, as a preferred scheme, the clamping mechanism 3 further comprises two second motors 307, two threaded rods 308 and four adjusting seats 309, the two second motors 307 are fixedly installed on the outer walls of the two end covers 306 respectively, the two threaded rods 308 are rotationally connected to the inner side walls of the two guide seats 305 respectively, and the four adjusting seats 309 are slidably connected to the outer walls of the two guide seats 305 respectively, and the outer walls of the four adjusting seats 309 are threadedly connected with the outer surfaces of the two threaded rods 308 respectively, the second motor 307 is fixed to the end cover 306, the output end is connected with the threaded rod 308, the threaded rod 308 is threadedly matched with the adjusting seat 309, the threaded rod 308 is driven to rotate by the motor, the adjusting seat 309 is driven to slide along the guide seat 305, the position of the adjusting seat 309 is accurately fine-tuned, the distance between the clamping plates 3011 is controlled, the accurate clamping of circuit boards of different specifications is adapted, and the clamping accuracy and compatibility are improved. In the above embodiment, as a preferred scheme, the clamping mechanism 3 further comprises four second hydraulic rods 3010, four clamping plates 3011, a plurality of sliding grooves 3012, limiting pieces 3013 and fastening bolts 3014, the four second hydraulic rods 3010 are fixedly installed on the top of the four adjusting seats 309 respectively, the output ends of the four second hydraulic rods 3010 pass through one end of the four adjusting seats 309 and are fixedly installed with the top of the four clamping plates 3011 respectively, a plurality of sliding grooves 3012 are formed in the lower part of the four clamping plates 3011 respectively, a plurality of limiting pieces 3013 are slidably connected to the inner side walls of the plurality of sliding grooves 3012 respectively, and a plurality of fastening bolts 3014 are threadedly provided in the top of the four clamping plates 3011 respectively, one end of the fastening bolt 3014 passing through the sliding groove 3012 abuts against the top of the limiting piece 3013, the adjusting seat 309 is slidably connected to the guide seat 305, the second hydraulic rod 3010 is fixed to the adjusting seat 309, and the output end is connected with the clamping plate 3011, the clamping plate 3011 is driven to move up and down by hydraulic pressure, the circuit board is clamped or released, the hydraulic drive provides stable clamping force, ensures that the circuit board does not loosen or shift during conveying, and at the same time, the position of the adjusting seat 309 is fine-tuned, the thickness change of the circuit board is adapted, the compatibility of products of different specifications is realized, the position of the limiting piece 3013 is fixed by the fastening bolt 3014, the effective clamping height of the clamping plate 3011 is adjusted, the circuit board of different thicknesses is lifted from below by the limiting piece 3013, the circuit board uniformly passes through the wave soldering area, and the detachable setting can be replaced after regular use, reducing the difficulty of maintenance.

[0029] When the circuit board needs to be welded, the first hydraulic rod 304 is extended outward, and the second motor 307 is reversed at the same time, so that the two second hydraulic rods 3010 are separated by a suitable distance, the four clamping plates 3011 are opened in a diagonal line, and the mechanical arm can move the circuit board between the four clamping plates 3011. At the same time, the first hydraulic rod 304 is retracted and the second motor 307 is forward rotated. The movement position of the clamping plate 3011 is limited by the limit switch, until the four clamping plates 3011 clamp and fix the circuit board, and the limiting piece 3013 lifts the circuit board from below at the same time. The limit switch controls the first hydraulic rod 304 and the second motor 307 to stop, so that the circuit board moves smoothly with the clamping mechanism 3, thereby avoiding the relative displacement of the circuit board when the clamping mechanism 3 moves. The four clamping plates 3011 are folded in a diagonal line at the same time, so that the mechanical arm does not need to adjust the position of the circuit board alone, which reduces the time of the mechanical arm adjusting the position of the circuit board, thereby further improving the efficiency of loading the circuit board. When reaching the upper side of the welding mechanism 5, the second hydraulic rod 3010 is extended, and the relative position is controlled by the distance sensor, so that the pin of the circuit board can reach the wave soldering surface of the solder pool 502. After welding, the bottom end of the circuit board is leveled with the top of the first conveying belt 407 by retracting the second hydraulic rod 3010, which facilitates the subsequent unloading step. Since the existing circuit board conveying mechanism adopts the mode of welding a single or a small number of circuit boards in turn, when a single circuit board is completed wave soldering, the assembly line needs to be stopped, and a special dismounting device is used to dismount the circuit board from the welding tool. This intermittent production mode causes the assembly line to start and stop frequently, thereby seriously reducing the welding efficiency.

[0030] In the above embodiment, as a preferred solution, it also includes a conveying mechanism 4, which includes a mounting frame 401, multiple supporting legs 402, three first driven rollers 403, three second driven rollers 404, three active rollers 405 and a third motor 406. The two sides of the outer surface of the mounting frame 401 are fixedly connected to the outer surfaces of the multiple supporting legs 402, the three first driven rollers 403 are respectively rotatably connected to one end of the mounting frame 401, the three second driven rollers 404 are respectively rotatably connected to the inner wall of the mounting frame 401 and are located on one side of the three first driven rollers 403, the three active rollers 405 are rotatably connected to the other end of the mounting frame 401, the third motor 406 is fixedly installed on the outer wall of the mounting frame 401, and the output end of the third motor 406 penetrates into the mounting frame 401. One end is connected to the ends of the three active rollers 405 through a key transmission, and the conveyor belt is supported and guided by the first driven roller 403 and the second driven roller 404. The active roller 405 is driven by the third motor 406 to drive the conveyor belt. The coordinated action of multiple rollers ensures uniform tension of the conveyor belt, avoids slipping or deviation, and realizes smooth transportation of the circuit board. The drive of the active roller 405 ensures that the conveying speed is synchronized with the clamping mechanism 3, ensuring that the circuit board continuously and uninterruptedly detaches from the clamping mechanism 3. The third motor 406 provides power for the conveyor belt. Through the stable drive of the third motor 406, it is ensured that the conveyor belt runs at a constant speed, matching the conveying speed of the drive mechanism 2, realizing continuous production of circuit boards from welding to unloading, and avoiding the efficiency loss of traditional intermittent shutdown unloading.

[0031] In the above embodiment, as a preferred solution, the conveying mechanism 4 further comprises a first conveying belt 407 arranged below the two fixed frames 201 and the top of the first conveying belt 407 is flush with the lower plane of the clamping mechanism 3, and two second conveying belts 408 are arranged on both sides of the first conveying belt 407, and the end of the two second conveying belts 408 is lower than the lower plane of the clamping mechanism 3. The first conveying belt 407 and the second conveying belt 408 are used to unload the completed circuit board after welding. The top of the first conveying belt 407 is flush with the bottom of the clamping mechanism 3, and the conveying speeds of the driving belt 204, the first conveying belt 407 and the second conveying belt 408 are consistent. Therefore, when the circuit board is conveyed to the end of the first conveying belt 407 close to the driving mechanism 2, the driving mechanism 2 drives the clamping mechanism 3 to be relatively stationary with the first conveying belt 407 and the second conveying belt 408. When the circuit board moves to the end of the first conveying belt 407, the top of the first conveying belt 407 is slowly in contact with the bottom of the circuit board without relative displacement by the guiding mode of the arc, until the top of the first conveying belt 407 completely lifts the middle of the bottom of the circuit board. At this time, the second motor 307 drives the threaded rod 308 to reverse, so that the two clamping plates 3011 move reversely, and the circuit board is released. At the same time, the clamping mechanism 3 is guided by the guide rail 205 to move upward and overturn, so that the circuit board is completely separated from the clamping mechanism 3. At the same time, the second conveying belt 408 is also in contact with the bottom of the circuit board by the oblique transmission, and then the bottom of the circuit board is lifted from both sides of the first conveying belt 407, so as to ensure the stability of the circuit board conveying. Therefore, the driving mechanism 2 and the clamping mechanism 3 do not need to stop, and the completed circuit board after welding can be unloaded. In cooperation with the driving mechanism 2, multiple circuit boards can be simultaneously wave soldered, so as to improve the overall processing efficiency. At the same time, the circuit board is lifted from the bottom and is relatively stationary, so as to avoid the impact or damage of the pins caused by the falling impact due to the distance when the circuit board is placed by the mechanical hand. The driving mechanism 2 does not need to stop to complete the unloading, realizes the continuous production mode of "welding and unloading", and greatly improves the efficiency.

[0032] Below the guide rail 205 and at the position of the end of the first conveying belt 407, an infrared position sensor is arranged, after the clamping mechanism 3 reaches the infrared position sensor, the second motor 307 reverses, the two adjusting seats 309 oppositely displace, the two clamping plates 3011 are loosened from the two sides of the circuit board, and the four clamping plates 3011 on the two sides of the bracket 301 are separated, the horizontal locking of the circuit board is loosened, after the bottom of the circuit board is completely contacted with the top of the first conveying belt 407, the four first hydraulic rods 304 extend outward, the guide seat 305 drives the clamping plate 3011 to reversely move, the vertical locking of the circuit board is loosened, and then the circuit board completely falls on the top of the first conveying belt 407, and the space between the four clamping plates 3011 is large, and the circuit board is not influenced when being turned up again.

[0033] In the above embodiment, as a preferred scheme, the welding mechanism 5 includes a wave soldering machine 501 and a solder pool 502, the wave soldering machine 501 is arranged below the clamping mechanism 3, the solder pool 502 is arranged above the wave soldering machine 501, a wave soldering station is arranged on the solder pool 502, a molten solder wave is generated through the solder pool 502, when the clamping mechanism 3 carries the circuit board to pass, the solder contacts the circuit board pad and the element pin, welding is realized, the continuous conveying of the driving mechanism 2 is matched, the circuit board passes through the wave soldering area at a constant speed, welding time and temperature are ensured to be uniform, quality problems such as virtual welding and missing welding are reduced, and the continuous production mode avoids frequent start and stop of traditional intermittent welding, and improves equipment utilization and production efficiency.

[0034] In the application, the working steps of the device are as follows: 1. First, the initial position of the clamping plate 3011 is adjusted, the first hydraulic rod 304 drives the guide seat 305 to move horizontally, the distance between the two guide seats 305 is adjusted according to the width of the circuit board, the quick adaptation of the circuit board of different widths is realized, the second motor 307 drives the threaded rod 308 to rotate, the adjusting seat 309 is driven to slide along the guide seat 305, the horizontal position of the clamping plate 3011 is finely adjusted, the clamping precision is ensured, the circuit board is placed above the four limiting pieces 3013, the roller 303 is in contact with the driving belt 204 and the guide rail 205, and it is ensured that the clamping mechanism 3 is in the stable clamping space between the driving belt 204 and the guide rail 205; 2、Secondly, the driving mechanism 2 drives the circuit board to move, the first motor 203 drives the rotation of the driving wheel 202, and the driving belt 204 moves along the outer edge of the fixed frame 201. The rest of the driving wheels 202 serve as driven wheels to assist the support of the belt track. The guide rail 205 limits the lateral displacement of the clamping mechanism 3 through rigid constraint, and forms a bidirectional clamping with the driving belt 204, ensuring the smooth movement of the clamping mechanism 3 along the predetermined track. The clamping mechanism 3 carries the circuit board to move to the area of the welding mechanism 5 below the support mechanism 1 at a constant speed. The wave soldering machine 501 generates a molten solder wave through the solder pool 502. The circuit board passes through the wave at a set angle and speed, completing the welding of the pads and component pins. Since the driving belt 204 moves at a constant speed, the circuit board can continuously pass through the welding area without stopping, avoiding the efficiency loss of traditional intermittent production. 3、Then, the circuit board after welding is unloaded. The clamping mechanism 3 carries the circuit board after welding to move above the conveying mechanism 4. At this time, the top of the first conveying belt 407 is level with the lower plane of the clamping mechanism 3, and the end of the second conveying belt 408 is lower than the lower plane of the clamping mechanism 3. The circuit board is gradually lifted by the first conveying belt 407 from the middle, while the second conveying belt 408 assists from both sides, until it is completely separated from the clamping plate 3011 of the clamping mechanism 3. The third motor 406 drives the rotation of the driving roller 405, which drives the synchronous operation of the first conveying belt 407 and the second conveying belt 408, and conveys the unloaded circuit board to the next process. Since the conveying belt speed matches the driving belt 204 speed, the unloading process does not require the driving mechanism 2 to stop, realizing the continuous production mode of "welding and unloading at the same time".

[0035] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A circuit board automatic welding equipment, characterized by: It comprises a welding mechanism (5), a clamping mechanism (3) and a driving mechanism (2), wherein: The welding mechanism (5) is provided with a wave soldering station, and the wave soldering station is used to perform wave soldering on the circuit board passing through; The driving mechanism (2) comprises a driving belt (204), a guide rail (205), a driving unit, and a fixing frame (201) at least partially located above the wave soldering station, wherein the driving belt (204) is sleeved on the outer surface of the fixing frame (201), the driving unit is arranged on the guide rail (205) and is used to drive the driving belt (204) to operate, the guide rail (205) is fixedly connected to the fixing frame (201) and at least partially located outside the driving belt (204), and a conveying groove is formed between the portion of the guide rail (205) located outside the driving belt (204) and the driving belt (204); The clamping mechanism (3) is at least partially disposed in the conveying trough, and is used to carry and fix the circuit board. The portion located in the conveying trough is driven by a drive belt (204) to move in the conveying trough, so that the carried circuit board passes through the wave soldering station for soldering.

2. The automatic circuit board soldering equipment according to claim 1, characterized in that: The support mechanism (1) comprises a support frame (101), a plurality of support legs (102) and a plurality of pads (103); the support frame (101) is fixedly mounted on the inner wall of the fixed frame (201); the plurality of support legs (102) are respectively fixedly mounted on the outer wall of the support frame (101); the plurality of pads (103) are respectively fixedly mounted on the outer walls of the plurality of support legs (102); and the tops of the plurality of pads (103) are respectively fixedly connected to the bottoms of the guide rails (205).

3. The automatic circuit board soldering equipment according to claim 1, characterized in that: The driving portion comprises a plurality of driving wheels (202) and a first motor (203), wherein the plurality of driving wheels (202) are respectively rotatably connected to the outer edge of the fixing frame (201), and the plurality of first motors (203) are respectively fixedly mounted on the outer wall of the fixing frame (201), and the output end is connected to the outer wall of a portion of the driving wheels (202) via a key transmission, and the driving belt (204) is transmission-connected to the outer walls of the plurality of driving wheels (202).

4. The automatic circuit board soldering equipment according to claim 1, characterized in that: The clamping mechanism (3) comprises a bracket (301), a plurality of positioning shafts (302) and a plurality of rollers (303), wherein the plurality of positioning shafts (302) are fixedly mounted on both sides of the outer surface of the bracket (301), the plurality of rollers (303) correspond to the plurality of positioning shafts (302), the rollers (303) are rotatably connected to the outer surfaces of the corresponding positioning shafts (302), and the plurality of rollers (303) are all located in the conveying trough, and the outer circumferential surfaces thereof are in contact with the surface of the driving belt (204) and the inner wall of the guide rail (205).

5. The automatic circuit board soldering equipment according to claim 4, characterized in that: The clamping mechanism (3) further comprises four first hydraulic rods (304), two guide seats (305) and four end covers (306), wherein the four first hydraulic rods (304) are respectively fixedly mounted on the outer wall of the bracket (301), both sides of the outer walls of the two guide seats (305) are respectively fixedly mounted on the output ends of the four first hydraulic rods (304), and the four end covers (306) are respectively fixedly mounted on the two ends of the two guide seats (305).

6. The automatic circuit board soldering equipment according to claim 5, characterized in that: The clamping mechanism (3) further comprises two second motors (307), two threaded rods (308) and four adjustment seats (309), wherein the two second motors (307) are respectively fixedly mounted on the outer walls of the two end covers (306), the two threaded rods (308) are respectively rotatably connected to the inner side walls of the two guide seats (305), the four adjustment seats (309) are respectively slidably connected to the outer walls of the two guide seats (305), and the outer walls of the four adjustment seats (309) are respectively threadedly connected to the outer surfaces of the two threaded rods (308).

7. The automatic circuit board soldering equipment according to claim 6, characterized in that: The clamping mechanism (3) further comprises four second hydraulic rods (3010), four clamping plates (3011), a plurality of slides (3012), a limiting plate (3013) and a fastening bolt (3014), wherein the four second hydraulic rods (3010) are respectively fixedly mounted on the tops of the four adjustment seats (309), the output ends of the four second hydraulic rods (3010) pass through one end of the four adjustment seats (309) and are respectively fixedly mounted on the tops of the four clamping plates (3011), the plurality of slides (3012) are respectively opened below the four clamping plates (3011), the plurality of limiting plates (3013) are respectively slidably connected to the inner side walls of the plurality of slides (3012), the plurality of fastening bolts (3014) are respectively threadedly mounted on the tops of the four clamping plates (3011), and one end of the fastening bolt (3014) passes through the slides (3012) and presses against the top of the limiting plate (3013).

8. The automatic circuit board soldering equipment according to claim 1, characterized in that: The invention also includes a conveying mechanism (4), which includes a mounting frame (401), a plurality of supporting legs (402), three first driven rollers (403), three second driven rollers (404), three active rollers (405) and a third motor (406). Both sides of the outer surface of the mounting frame (401) are fixedly connected to the outer surfaces of the plurality of supporting legs (402). The three first driven rollers (403) are respectively rotatably connected to one end of the mounting frame (401). The three second driven rollers (404) are respectively rotatably connected to the inner wall of the mounting frame (401) and are located on one side of the three first driven rollers (403). The three active rollers (405) are rotatably connected to the other end of the mounting frame (401). The third motor (406) is fixedly mounted on the outer wall of the mounting frame (401). The output end of the third motor (406) penetrates one end of the mounting frame (401) and is connected to the ends of the three active rollers (405) through a key transmission.

9. The automatic circuit board soldering equipment according to claim 8, characterized in that: The conveying mechanism (4) further includes a first conveying belt (407) and two second conveying belts (408), wherein the first conveying belt (407) is arranged below between the two fixing frames (201), and the top of the first conveying belt (407) is flush with the lower plane of the clamping mechanism (3), and the two second conveying belts (408) are respectively arranged on both sides of the first conveying belt (407), and the ends of the two second conveying belts (408) are lower than the lower plane of the clamping mechanism (3).

10. The automatic circuit board soldering equipment according to claim 1, characterized in that: The soldering mechanism (5) comprises a wave soldering machine (501) and a solder pool (502), wherein the wave soldering machine (501) is arranged below the clamping mechanism (3), the solder pool (502) is arranged above the wave soldering machine (501), and the wave soldering station is arranged on the solder pool (502).

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