A spot welding device for multi-head parallel belt automatic focusing of a PCBA board

Abstract

The present invention discloses a spot welding device with multi-head parallel belt automatic focusing for PCBA boards, which relates to the technical field of PCBA board processing and includes a frame and a positioning component. A first linear module is arranged on the upper part of the frame, and a second linear module is arranged in the middle of the first linear module. The present invention uses the positioning grooves on the loading platform to limit the PCBA boards. At the same time, there are two groups of positioning grooves and spot welding guns, which can simultaneously perform spot welding on two PCBA boards of the same type, thereby improving the efficiency during the processing of PCBA boards. And when the conveyor moves the loading platform under the spot welding gun, the sliding columns on the loading platform will be located at the lower part of the limiting frame. As the electric push rod moves down, the limiting frame can be driven to move down through the lifting plate, sliding plate, slider and limiting sleeve. At the same time, the lower part of the limiting frame expands outwards, so as to limit and guide the sliding columns, make the sliding columns fit with the inner side of the limiting frame, and at this time the loading platform can slide a small distance on the optical rod.

Description

Technical Field

[0001] The present invention relates to the technical field of PCBA board processing, and particularly to a spot welding device for multi-head parallel belt automatic focusing of PCBA boards. Background Art

[0002] A PCBA board is a common circuit board component in electronic manufacturing, with the full Chinese name being "printed circuit board assembly". PCBA is a finished circuit board formed by soldering electronic components onto an empty PCB printed circuit board. During the soldering process of PCBA boards, a spot welding device is required.

[0003] For example, the patent with the application number CN202320980537.3 discloses a spot welding device for PCBA board processing. Through the combined use of a power component and a lifting component, this patent plays a role in lifting the PCBA board, avoiding the need for users to manually carry and load materials, saving time and effort, preventing the situation of arm soreness for users during long-term handling, improving the protection for users, enhancing the operation efficiency of users, and shortening the working hours of users. However, in the actual use process of such devices, they can only position the two sides of the PCBA board, and it is not convenient to correct the deviation in the other two directions, resulting in the problem that the subsequent spot welding accuracy may be affected due to the focus deviation between the spot welding gun and the solder joints on the PCBA board.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a spot welding device for multi-head parallel belt automatic focusing of PCBA boards is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a spot welding device for multi-head parallel belt automatic focusing of PCBA boards to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A spot welding device for multi-head parallel belt automatic focusing of a PCBA board, including a frame and a positioning component. A first linear module is arranged on the upper part of the frame, and a second linear module is arranged in the middle of the first linear module. Electric push rods are symmetrically arranged at the bottom of the second linear module, and a lifting plate is connected to the bottom of the electric push rods. Spot welding guns are symmetrically arranged at the bottom of the lifting plate. A conveyor is arranged at the lower part of the frame. The positioning component is arranged above the conveyor. The positioning component includes a fixed seat, a smooth rod, a return spring, a carrier table, a positioning groove, a sliding column, a sliding plate, a slider, a limit sleeve and a limit frame. Smooth rods are arranged at both ends inside the fixed seat, and return springs are sleeved on the outer sides of both ends of the smooth rods. A carrier table is arranged between the return springs, and the carrier table is slidably connected to the smooth rods. A positioning groove is formed at the top of the carrier table, and sliding columns are fixed at all four ends of the carrier table. Sliding plates are slidably connected to the inner sides of both sides of the lifting plate, and a slider is fixed at one end of the sliding plate. The slider is slidably connected to the outside of the limit sleeve, and a limit frame is fixed at the bottom of the limit sleeve.

[0007] Further, the limit sleeve is slidably connected to the frame, and the cross-section of the limit sleeve is C-shaped.

[0008] Further, a smoke removal component is arranged in the middle of the lifting plate. The smoke removal component includes a guide sleeve, a guide groove, a ball and a driving rod. A guide sleeve is arranged at the center of the bottom of the second linear module, and a guide groove is formed inside the guide sleeve, and the guide groove is in a double helix shape. A ball is slidably connected inside the guide groove, and a driving rod is arranged between the balls, and the driving rod is slidably connected to the guide sleeve.

[0009] Further, the smoke removal component further includes a transmission box, a toothed ring cover, a planetary gear and a central gear. The bottom of the driving rod is rotatably connected to a transmission box, and the transmission box is fixed to the lifting plate. The bottom of the transmission box is rotatably connected to a toothed ring cover. A planetary gear is meshed inside the toothed ring cover, and a central gear is meshed on one side of the planetary gear.

[0010] Further, the smoke removal component further includes a rotating seat, a clamping plate and an end tooth shaft. A rotating seat is arranged inside the central gear, and a clamping plate is rotatably connected to the bottom of the rotating seat, and an end tooth shaft is connected to the bottom of the clamping plate.

[0011] Further, the smoke removal component further includes a fan blade, a fixed cover and an activated carbon filter plate. A fan blade is fixed to the outer side of the middle of the end tooth shaft, and the bottom of the end tooth shaft is rotatably connected to a fixed cover. An activated carbon filter plate is arranged inside the lower end of the fixed cover, and the fixed cover is fixed to the lifting plate, and the fixed cover is respectively rotatably connected to the planetary gear and the central gear.

[0012] Furthermore, a commutation component is arranged inside the transmission case. The commutation component includes a driving gear, a commutation gear, and a driven gear. The driving gear is arranged at the bottom of the driving rod, and a commutation gear is meshed with one side of the driving gear. The commutation gear is rotatably connected to the transmission case, and a driven gear is meshed with one side of the commutation gear.

[0013] Furthermore, the commutation component further includes a spring seat, a clamping block, and a ratchet column. Spring seats are arranged on one side of both the driving gear and the driven gear, and a clamping block is fixed to one end of each spring seat. A ratchet column is arranged at one end of the clamping block. The ratchet column is rotatably connected to the driven gear and is fixedly connected to the tooth ring cover.

[0014] Furthermore, a blanking component is arranged inside the loading platform. The blanking component includes an adjusting rod, a synchronizing rod, and a guiding plate. The adjusting rod is slidably connected to one side of the loading platform, and the synchronizing rod is rotatably connected to the end of the adjusting rod. Guiding plates are fixed to both sides of the synchronizing rod, and the guiding plates are slidably connected to the loading platform.

[0015] Furthermore, the blanking component further includes a limiting block, a top plate, a limiting column, and a limiting plate. The limiting block is slidably connected to the top of the guiding plate and is also slidably connected to the loading platform. The top plate is arranged on the top of the limiting block. The limiting column is fixedly connected to the outer side of the middle part of the adjusting rod. The limiting plate is arranged on one side of the loading platform and is in a right-angled shape.

[0016] The present invention provides a spot welding device for multi-head parallel belt automatic focusing of PCBA boards, having the following beneficial effects:

[0017] 1. The present invention uses the positioning grooves on the loading platform to limit the PCBA boards. At the same time, there are two groups of positioning grooves and spot welding guns, which can simultaneously perform spot welding on two PCBA boards of the same type, thereby improving the processing efficiency of the PCBA boards. When the conveyor moves the loading platform below the spot welding gun, the sliding columns on the loading platform will be located at the lower part of the limiting frame. As the electric push rod extends, the limiting frame can be driven to move downward through the lifting plate, sliding plate, sliding block, and limiting sleeve. At the same time, the lower part of the limiting frame expands outward, so as to limit and guide the sliding columns, making the sliding columns fit with the inner side of the limiting frame. At this time, the loading platform can slide a small distance on the optical rod, and can be automatically calibrated and positioned along the length direction of the conveyor, avoiding the situation that the conveyor moves the loading platform too much or too little, resulting in a focusing offset between the spot welding gun and the welding point during the spot welding process along the preset route.

[0018] 2. During the spot welding process of the present invention, the electric push rod drives the lifting plate to move downward by a small distance, then move upward by a small distance. After adjusting the position through the first linear module and the second linear module, the spot welding operation is repeated. During this process, the lifting plate drives the driving rod to slide in the guide sleeve through the transmission box. At the same time, the ball will slide along the double spiral guide groove, which can drive the driving rod to rotate. Thus, the tooth ring cover is rotated through the reversing component in the transmission box, and the fan blade on the end tooth shaft is driven to rotate by the planetary gear, the central gear, the rotating seat and the clamping plate. Therefore, the fumes generated during the spot welding process can be sucked into the fixed cover, filtered by the activated carbon filter plate and then discharged from above. Therefore, it is not necessary to add an additional power source to adsorb and purify the fumes, which is more energy-saving and environmentally friendly. And the clamping plate fits with the helical tooth groove on the end tooth shaft under the action of gravity. Therefore, when the rotating seat stops rotating, the end tooth shaft will continue to rotate under the action of inertia. At this time, the clamping plate will slip with the end tooth shaft, thus avoiding the situation of consuming a large amount of kinetic energy of the fan blade due to sudden stop.

[0019] 3. When the driving rod drives the driving gear to rotate, the present invention will also make the driven gear rotate in the reverse direction through the reversing gear. At this time, since the ratchet column is rotationally connected to the driven gear, the ratchet column cannot be directly driven to rotate by the driving gear and the driven gear. However, the two clamping blocks will rotate on the outside of the ratchet column in different directions through the spring seat. And when one of the clamping blocks engages with the tooth groove on the ratchet column, the other will squeeze the spring seat under the guidance of its inclined surface and will slide with the ratchet column. Therefore, no matter whether the driving gear rotates forward or backward, the ratchet column will finally drive the tooth ring cover to rotate in a single direction. Therefore, during the lifting process of the lifting plate, the driving force of the fan blade can be provided, thus improving the effect of smoke removal.

[0020] 4. When taking out the PCBA board, the present invention only needs to push the adjusting rod, and the synchronous rod can drive all the guide plates to move simultaneously, so that they squeeze the inclined surface at the bottom of the limiting block. The limiting block will drive the top plate to move upward under the limitation of the loading platform, so as to eject the PCBA board from the positioning groove, making the periphery of the PCBA board unobstructed, facilitating the taking and unloading of the PCBA board. At the same time, the adjusting rod can also be rotated to make the limiting column move to the inner side of the corner of the limiting plate, so as to quickly position the position of the synchronous rod without continuous pushing. And when placing the PCBA board, only need to reset the adjusting rod, and the top plate will move downward and reset under the action of gravity, making the operation very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic front view structure diagram of the overall PCBA board multi-head type and belt automatic focusing spot welding device of the present invention;

[0022] Figure 2 It is a three-dimensional structure diagram of the loading platform of the PCBA board multi-head type and belt automatic focusing spot welding device of the present invention;

[0023] Figure 3 Schematic three-dimensional structure diagram of the positioning component of a multi-head and belt automatic focusing spot welding device for a PCBA board according to the present invention;

[0024] Figure 4 Schematic three-dimensional structure diagram of a part of the smoke removal component of a multi-head and belt automatic focusing spot welding device for a PCBA board according to the present invention;

[0025] Figure 5 Schematic internal structure diagram of the fixed cover of a multi-head and belt automatic focusing spot welding device for a PCBA board according to the present invention;

[0026] Figure 6 Schematic three-dimensional structure diagram of the commutation component of a multi-head and belt automatic focusing spot welding device for a PCBA board according to the present invention;

[0027] Figure 7 Schematic three-dimensional structure diagram of the blanking component of a multi-head and belt automatic focusing spot welding device for a PCBA board according to the present invention.

[0028] In the figure: 1, frame; 2, first linear module; 3, second linear module; 4, electric push rod; 5, lifting plate; 6, spot welding gun; 7, conveyor; 8, positioning component; 801, fixed seat; 802, optical rod; 803, return spring; 804, carrier table; 805, positioning groove; 806, sliding column; 807, sliding plate; 808, slider; 809, limit sleeve; 810, limit frame; 9, smoke removal component; 901, guide sleeve; 902, guide groove; 903, ball; 904, driving rod; 905, transmission box; 906, tooth ring cover; 907, planetary gear; 908, central gear; 909, rotating seat; 910, clamping plate; 911, end tooth shaft; 912, fan blade; 913, fixed cover; 914, activated carbon filter plate; 10, commutation component; 1001, driving gear; 1002, commutation gear; 1003, driven gear; 1004, spring seat; 1005, clamping block; 1006, ratchet column; 11, blanking component; 1101, adjusting rod; 1102, synchronizing rod; 1103, guide plate; 1104, limit block; 1105, top plate; 1106, limit column; 1107, limit plate. Detailed implementation manners

[0029] Please refer to Figures 1 to 7, the present invention provides a technical solution: a multi-head parallel-belt automatic focusing spot welding device for a PCBA board, which includes a frame 1 and a positioning component 8. A first linear module 2 is arranged on the upper part of the frame 1, and a second linear module 3 is arranged in the middle of the first linear module 2. Electric push rods 4 are symmetrically arranged at the bottom of the second linear module 3, and a lifting plate 5 is connected to the bottom of the electric push rods 4. Spot welding guns 6 are symmetrically arranged at the bottom of the lifting plate 5. A conveyor 7 is arranged at the lower part of the frame 1, and the positioning component 8 is arranged above the conveyor 7. The positioning component 8 includes a fixed seat 801, a light rod 802, a return spring 803, a carrier table 804, a positioning groove 805, a sliding column 806, a sliding plate 807, a slider 808, a limit sleeve 809 and a limit frame 810. Light rods 802 are arranged at both ends inside the fixed seat 801, and return springs 803 are sleeved on the outer sides of both ends of the light rods 802. A carrier table 804 is arranged between the return springs 803, and the carrier table 804 is slidably connected to the light rods 802. A positioning groove 805 is opened at the top of the carrier table 804, and sliding columns 806 are fixed at all four ends of the carrier table 804. Sliding plates 807 are slidably connected inside both sides of the lifting plate 5, and a slider 808 is fixed at one end of the sliding plate 807. The slider 808 is slidably connected to the outside of a limit sleeve 809, and a limit frame 810 is fixed at the bottom of the limit sleeve 809.

[0030] Please refer to Figures 1 to 5The limit sleeve 809 is slidably connected to the frame 1, and the cross-section of the limit sleeve 809 is C-shaped. A smoke removal assembly 9 is provided in the middle of the lifting plate 5. The smoke removal assembly 9 includes a guide sleeve 901, a guide groove 902, a ball 903, and a drive rod 904. The guide sleeve 901 is arranged at the center of the bottom of the second linear module 3, and a guide groove 902 is opened inside the guide sleeve 901. The guide groove 902 is in a double helix shape. The ball 903 is slidably connected inside the guide groove 902, and a drive rod 904 is arranged between the balls 903. The drive rod 904 is slidably connected to the guide sleeve 901. The smoke removal assembly 9 further includes a transmission box 905, a tooth ring cover 906, a planetary gear 907, and a central gear 908. The bottom of the drive rod 904 is rotatably connected to the transmission box 905, and the transmission box 905 is fixedly connected to the lifting plate 5. The bottom of the transmission box 905 is rotatably connected to the tooth ring cover 906. The planetary gear 907 is meshed inside the tooth ring cover 906, and the central gear 908 is meshed on one side of the planetary gear 907. The smoke removal assembly 9 further includes a rotating seat 909, a clamping plate 910, and an end tooth shaft 911. The rotating seat 909 is arranged inside the central gear 908. The bottom of the rotating seat 909 is rotatably connected to the clamping plate 910, and the bottom of the clamping plate 910 is connected to the end tooth shaft 911. The smoke removal assembly 9 further includes a fan blade 912, a fixed cover 913, and an activated carbon filter plate 914. The fan blade 912 is fixed to the outer side of the middle of the end tooth shaft 911. The bottom of the end tooth shaft 911 is rotatably connected to the fixed cover 913. The activated carbon filter plate 914 is arranged inside the lower end of the fixed cover 913. The fixed cover 913 is fixedly connected to the lifting plate 5. The fixed cover 913 is rotatably connected to the planetary gear 907 and the central gear 908 respectively;

[0031] The specific operation is as follows. First, place the PCBA board in the positioning groove 805 on the carrier table 804, and then start the conveyor 7. Move the carrier table 804 to below the spot welding gun 6 and stop the conveying. At this time, the sliding column 806 on the carrier table 804 will be located at the lower part of the limit frame 810. As the electric push rod 4 extends, the limit frame 810 can be driven to move downward through the lifting plate 5, the sliding plate 807, the slider 808 and the limit sleeve 809. At the same time, the lower part of the limit frame 810 expands outward, so as to limit and guide the sliding column 806, making the sliding column 806 fit with the inner side of the limit frame 810. At this time, the carrier table 804 can slide a small distance on the optical rod 802, and can be automatically calibrated and positioned along the length direction of the conveyor 7, preventing the situation that the initial spot welding position is misaligned after the conveyor 7 moves the carrier table 804. After that, the electric push rod 4 will drive the lifting plate 5 to move downward a small distance, so that the spot welding gun 6 focuses on and welds the solder joints on the PCBA board. After moving upward a small distance, the first linear module 2 and the second linear module 3 will be driven by the controller to drive the spot welding gun 6 to move along a preset route to weld other positions. During the lifting process of the lifting plate 5, the lifting plate 5 will also drive the driving rod 904 to slide in the guide sleeve 901 through the transmission box 905. At the same time, the ball 903 will slide along the double spiral guide groove 902, driving the driving rod 904 to rotate. Thus, the tooth ring cover 906 is rotated through the reversing component 10 in the transmission box 905, and the fan blade 912 on the end tooth shaft 911 is driven to rotate by the planetary gear 907, the central gear 908, the rotating seat 909 and the clamping plate 910. Therefore, the fumes generated during the spot welding process can be sucked into the fixed cover 913, filtered by the activated carbon filter plate 914 and then discharged from above. And the clamping plate 910 fits with the helical tooth groove on the end tooth shaft 911 under the action of gravity. Therefore, when the rotating seat 909 stops rotating, the end tooth shaft 911 will continue to rotate due to inertia. At this time, the clamping plate 910 will slip on the end tooth shaft 911, thus avoiding the situation of consuming a large amount of kinetic energy of the fan blade 912 due to sudden stop.

[0032] Please refer to Figure 2 、 Figure 6 and Figure 7, a reversing assembly 10 is arranged inside the transmission case 905. The reversing assembly 10 includes a driving gear 1001, a reversing gear 1002 and a driven gear 1003. The bottom of the driving rod 904 is provided with the driving gear 1001, and a reversing gear 1002 is meshed with one side of the driving gear 1001. The reversing gear 1002 is rotatably connected to the transmission case 905, and a driven gear 1003 is meshed with one side of the reversing gear 1002. The reversing assembly 10 further includes a spring seat 1004, a clamping block 1005 and a ratchet column 1006. Spring seats 1004 are arranged on one side of both the driving gear 1001 and the driven gear 1003, and a clamping block 1005 is fixed to one end of the spring seat 1004. A ratchet column 1006 is arranged at one end of the clamping block 1005, and the ratchet column 1006 is rotatably connected to the driven gear 1003 and is fixedly connected to the tooth ring cover 906. A blanking assembly 11 is arranged inside the loading platform 804. The blanking assembly 11 includes an adjusting rod 1101, a synchronizing rod 1102 and a guide plate 1103. The adjusting rod 1101 is slidably connected to one side of the loading platform 804, and the end of the adjusting rod 1101 is rotatably connected to the synchronizing rod 1102. Guide plates 1103 are fixed to both sides of the synchronizing rod 1102, and the guide plates 1103 are slidably connected to the loading platform 804. The blanking assembly 11 further includes a limiting block 1104, a top plate 1105, a limiting column 1106 and a limiting plate 1107. The limiting block 1104 is slidably connected to the top of the guide plate 1103, and the limiting block 1104 is slidably connected to the loading platform 804, and a top plate 1105 is arranged on the top of the limiting block 1104. A limiting column 1106 is fixed to the outer side of the middle part of the adjusting rod 1101. A limiting plate 1107 is arranged on one side of the loading platform 804, and the limiting plate 1107 is in a right-angled shape;

[0033] The specific operation is as follows. When the driving rod 904 drives the driving gear 1001 to rotate, it will also cause the driven gear 1003 to rotate in the reverse direction through the reversing gear 1002. At this time, since the ratchet column 1006 is rotationally connected to the driven gear 1003, the ratchet column 1006 cannot be directly driven to rotate by the driving gear 1001 and the driven gear 1003. However, the spring seat 1004 will cause the two latch blocks 1005 to move on the outside of the ratchet column 1006 in different directions respectively. And when one of the latch blocks 1005 engages with the tooth groove on the ratchet column 1006 and drives it to rotate synchronously, the other will squeeze the spring seat 1004 under the guidance of its inclined surface and will slide relative to the ratchet column 1006. Thus, regardless of whether the driving gear 1001 rotates forward or backward, the ratchet column 1006 will drive the tooth ring cover 906 to rotate in a single direction. Therefore, during the lifting and lowering of the lifting plate 5, the driving force of the fan blade 912 can be provided. And after spot welding is completed and the PCBA board needs to be taken out, just push the adjusting rod 1101, and the synchronizing rod 1102 can drive all the guide plates 1103 to move simultaneously, so that they squeeze the inclined surface at the bottom of the limiting block 1104. The limiting block 1104 will drive the top plate 1105 to move upward under the limitation of the loading platform 804, so as to eject the PCBA board from the positioning groove 805, making the periphery of the PCBA board unobstructed, facilitating the taking and unloading of the PCBA board. At the same time, the adjusting rod 1101 can also be rotated so that the limiting column 1106 moves to the inner side of the corner of the limiting plate 1107, thereby quickly positioning the position of the synchronizing rod 1102.

[0034] In summary, for the multi-head and belt automatic focusing spot welding device for PCBA boards, during use, first place the PCBA board in the positioning groove 805 on the loading platform 804, then start the conveyor 7. After moving the loading platform 804 below the spot welding gun 6, stop the conveyor. At this time, the sliding column 806 on the loading platform 804 will be located at the lower part of the limit frame 810. Secondly, as the electric push rod 4 extends, the limit frame 810 can be driven to move downward through the lifting plate 5, sliding plate 807, slider 808 and limit sleeve 809, so that the sliding column 806 fits with the inner side of the limit frame 810. At this time, the loading platform 804 can slide a small distance on the optical rod 802, and it can be automatically calibrated and positioned along the length direction of the conveyor 7, avoiding deviation caused by excessive or insufficient movement of the conveyor 7. Then, the electric push rod 4 will drive the lifting plate 5 to move downward a small distance, so that the spot welding gun 6 focuses and welds the solder joints on the PCBA board. After moving upward a small distance, the first linear module 2 and the second linear module 3 will also be driven by the controller to drive the spot welding gun 6 to move along a preset route to weld other positions. Then, during the lifting process of the lifting plate 5, the lifting plate 5 will also drive the driving rod 904 to slide in the guide sleeve 901 through the transmission box 905. At the same time, the ball 903 will slide along the double spiral guide groove 902, which can drive the driving rod 904 to rotate. When the driving rod 904 drives the driving gear 1001 to rotate, the driven gear 1003 will rotate in the reverse direction through the reversing gear 1002. At this time, since the ratchet column 1006 is rotationally connected to the driven gear 1003, the ratchet column 1006 cannot be directly driven to rotate by the driving gear 1001 and the driven gear 1003. However, the two clamping blocks 1005 will move on the outside of the ratchet column 1006 in different directions through the spring seat 1004. And when one of the clamping blocks 1005 engages with the tooth groove on the ratchet column 1006 and drives it to rotate synchronously, the other will squeeze the spring seat 1004 under the guidance of its inclined surface and will slide relative to the ratchet column 1006. Therefore, no matter whether the driving gear 1001 rotates forward or backward, the ratchet column 1006 will drive the tooth ring cover 906 to rotate in a single direction, and drive the fan blade 912 on the end tooth shaft 911 to rotate through the planetary gear 907, central gear 908, rotating seat 909 and clamping plate 910. Thus, the fumes during the spot welding process can be sucked into the fixed cover 913, filtered by the activated carbon filter plate 914 and then discharged from above. And the clamping plate 910 fits with the helical tooth groove on the end tooth shaft 911 under the action of gravity. Therefore, when the rotating seat 909 stops rotating, the end tooth shaft 911 will continue to rotate due to inertia. At this time, the clamping plate 910 will slip on the end tooth shaft 911, thus avoiding the situation of consuming a large amount of kinetic energy of the fan blade 912 due to sudden stop. Finally, after the spot welding is completed and the PCBA board needs to be taken out, just push the adjusting rod 1101, and the synchronizing rod 1102 can drive all the guide plates 1103 to move simultaneously, so that they squeeze the inclined surface at the bottom of the limit block 1104.The limit block 1104 will drive the top plate 1105 to move upward under the limit of the loading platform 804, so as to eject the PCBA board from the positioning groove 805, so that there is no obstruction around the PCBA board, which is convenient for taking and unloading it. At the same time, the adjusting rod 1101 can also be rotated to make the limit post 1106 move to the inner side of the corner of the limit plate 1107, so as to quickly position the synchronous rod 1102 without continuous pushing.

[0035] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A PCBA board multi-head spot welding device with auto focus, characterized in that: The invention comprises a frame (1) and a positioning assembly (8), wherein a first linear module (2) is arranged on the upper part of the frame (1), and a second linear module (3) is arranged in the middle part of the first linear module (2), an electric push rod (4) is symmetrically arranged at the bottom of the second linear module (3), and a lifting plate (5) is connected to the bottom of the electric push rod (4), and a spot welding gun (6) is symmetrically arranged at the bottom of the lifting plate (5), a conveyor (7) is arranged at the lower part of the frame (1), and the positioning assembly (8) is arranged above the conveyor (7), and the positioning assembly (8) comprises a fixed seat (801), a light rod (802), a return spring (803), a loading platform (804), a positioning groove (805), a sliding column (806), a sliding plate (807), and a plurality of sliding plates (808). ), a slider (808), a limit sleeve (809) and a limit frame (810), a polished rod (802) is arranged at both ends of the interior of the fixed seat (801), and a return spring (803) is sleeved on the outer sides of both ends of the polished rod (802), a loading platform (804) is arranged between the return springs (803), and the loading platform (804) is slidably connected to the polished rod (802), a positioning groove (805) is provided on the top of the loading platform (804), and sliding columns (806) are fixed at the four ends of the loading platform (804), sliding plates (807) are slidably connected to the interior of the two sides of the lifting plate (5), and a slider (808) is fixed to one end of the sliding plate (807), and the outer side of the slider (808) is slidably connected to the limit sleeve (809) ), and a limiting frame (810) is fixed at the bottom of the limiting sleeve (809), a smoke removal component (9) is arranged in the middle of the lifting plate (5), and the smoke removal component (9) includes a guide sleeve (901), a guide groove (902), a ball (903) and a driving rod (904), a guide sleeve (901) is arranged at the bottom center of the second linear module (3), and a guide groove (902) is provided inside the guide sleeve (901), and the guide groove (902) is in a double helix shape, and a ball (903) is slidably connected inside the guide groove (902), and a driving rod (904) is arranged between the balls (903), and the driving rod (904) is slidably connected to the guide sleeve (901), and the driving rod (904) is slidably connected to the guide sleeve (901), and the smoke removal component (9) also includes a transmission box ( 905), a gear ring cover (906), a planetary gear (907) and a central gear (908); the bottom of the driving rod (904) is rotatably connected to a transmission box (905), and the transmission box (905) is fixedly connected to the lifting plate (5); the bottom of the transmission box (905) is rotatably connected to a gear ring cover (906); the inner side of the gear ring cover (906) is meshed with a planetary gear (907), and one side of the planetary gear (907) is meshed with a central gear (908); the smoke removal component (9) also includes a rotating seat (909), a clamping plate (910) and an end gear shaft (911); the rotating seat (909) is arranged inside the central gear (908), and the bottom of the rotating seat (909) is rotatably connected to the clamping plate (910);The bottom of the card plate (910) is connected to an end gear shaft (911), and the smoke removal assembly (9) further comprises a fan blade (912), a fixed cover (913) and an activated carbon filter plate (914). The fan blade (912) is fixed to the outer side of the middle part of the end gear shaft (911), and the bottom of the end gear shaft (911) is rotatably connected to the fixed cover (913). The lower end of the fixed cover (913) is provided with an activated carbon filter plate (914). The fixed cover (913) is fixedly connected to the lifting plate (5), and the fixed cover (913) is rotatably connected to the planetary gear (907) and the central gear (908).

2. A PCBA board multi-head spot welding device with auto-focus according to claim 1, characterized in that: The limiting sleeve (809) is slidably connected to the frame (1), and the cross section of the limiting sleeve (809) is C-shaped.

3. The PCBA multi-head spot welding device with auto-focus according to claim 1, characterized in that: A reversing assembly (10) is arranged inside the transmission box (905), and the reversing assembly (10) comprises a driving gear (1001), a reversing gear (1002) and a driven gear (1003). The driving gear (1001) is arranged at the bottom of the driving rod (904), and the reversing gear (1002) is meshed on one side of the driving gear (1001). The reversing gear (1002) is rotatably connected to the transmission box (905), and the driven gear (1003) is meshed on one side of the reversing gear (1002).

4. A PCBA board multi-head spot welding device with auto-focus according to claim 3, characterized in that: The reversing assembly (10) further comprises a spring seat (1004), a clamping block (1005) and a ratchet column (1006); a spring seat (1004) is arranged on one side of the driving gear (1001) and the driven gear (1003); a clamping block (1005) is fixed at one end of the spring seat (1004); a ratchet column (1006) is arranged at one end of the clamping block (1005); the ratchet column (1006) is rotatably connected to the driven gear (1003), and the ratchet column (1006) is fixedly connected to the gear ring cover (906).

5. The PCBA multi-head spot welding device with auto-focus according to claim 1, characterized in that: A stripping assembly (11) is arranged inside the loading platform (804), and the stripping assembly (11) comprises an adjusting rod (1101), a synchronization rod (1102) and a guide plate (1103); one side of the loading platform (804) is slidably connected to the adjusting rod (1101), and the end of the adjusting rod (1101) is rotatably connected to the synchronization rod (1102); guide plates (1103) are fixed on both sides of the synchronization rod (1102), and the guide plates (1103) are slidably connected to the loading platform (804).

6. A PCBA board multi-head spot welding device with auto-focus according to claim 5, characterized in that: The stripping assembly (11) further comprises a limit block (1104), a top plate (1105), a limit column (1106) and a limit plate (1107); the top of the guide plate (1103) is slidably connected to the limit block (1104), and the limit block (1104) is slidably connected to the loading platform (804); the top plate (1105) is arranged on the top of the limit block (1104); the limit column (1106) is fixed on the outer side of the middle part of the adjusting rod (1101); the limit plate (1107) is arranged on one side of the loading platform (804), and the limit plate (1107) is in a right angle shape.

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