Circuit board welding equipment with solder skipping and repair welding functions

Abstract

The invention discloses circuit board welding equipment with solder skipping and repair welding functions, and relates to the technical field of circuit board welding, the welding equipment comprises a conveying device, a forming device and an adjusting device, the conveying device is used for conveying a circuit board, the conveying device is in fastening connection with the forming device, and the adjusting device is in fastening connection with the conveying device; the conveying device comprises two conveyors, the conveying direction of the two conveyors is 90 degrees, the conveyors are used for conveying a carrier plate, the carrier plate is used for fixing a circuit board, multi-station welding is carried out through the two conveyors which are vertically arranged, the conveyors are used for conveying the carrier plate, and the carrier plate is used for rapidly clamping and fixing the circuit board. The forming device is used for welding local positions on the circuit board, after welding is completed, welding spots are detected through the adjusting device, repair welding is conducted on local solder skipping positions, meanwhile, cold solder joints are welded again, and the welding quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board welding, in particular to welding equipment for circuit boards with a leak welding repair function. Background Art

[0002] As the core of electronic components, circuit boards are an important link in the manufacturing process of electronic products. Electrical components are integrated onto circuit boards through welding processes. Therefore, high requirements are placed on welding processes.

[0003] Among them, in order to ensure the manufacturing quality of high-end smart remote controls, such as air mouse remote controls, somatosensory remote controls, and smart remote controls (somatosensory, voice, touch, infrared learning, etc.), it is necessary to ensure the manufacturing accuracy during the circuit board welding process. At present, when welding circuit boards, semi-automatic welding is mostly used. The most important process is the circuit board leak repair welding detection process, which relies heavily on manual labor. Therefore, not only can the manufacturing efficiency not be guaranteed, but the manufacturing quality is also affected to a certain extent. During the welding process, problems such as cold welding and false welding are easily caused, and the efficiency of manual inspection is low.

[0004] In addition, due to the influence of various unstable factors in the welding process and the complex layout of the circuit board surface, conventional detection devices can only adopt multi-modular integration for comparative analysis, which greatly affects the detection efficiency. Summary of the invention

[0005] The object of the present invention is to provide a circuit board welding device with a leak repair function to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions: The welding equipment includes a conveying device, a forming device and an adjusting device. The conveying device is used to convey the circuit board. The conveying device and the forming device are tightly connected. The adjusting device and the conveying device are tightly connected. The conveying device includes a conveyor. There are two conveyors. The conveying directions of the two conveyors are ninety degrees. The conveyor is used to convey the carrier board, and the carrier board is used to fix the circuit board.

[0007] The conveying device serves as the main support body and is used to install other devices. Multi-station welding is performed through two vertically arranged conveyors. The conveyor is used to transport the carrier plate, and the carrier plate is used to quickly clamp and fix the circuit board. The forming device is used to weld the local position on the circuit board. After welding, the solder joints are detected through the adjustment device, and the local leaked positions are repaired. At the same time, the cold-welded parts are re-welded to improve the welding quality.

[0008] Furthermore, multiple forming devices are provided along the conveying direction of the two conveyors. The forming devices include a wire feeder and a laser head. The wire feeder and the laser head are respectively fastened to the adjacent conveyors, and the laser head emits light toward the contact position between the welding wire of the wire feeder and the circuit board.

[0009] The wire feeder is fixed on the conveyor and is used to transport the welding wire. When the welding wire is transported to the position to be welded on the circuit board, the laser head melts the welding wire at this location. The melted welding wire forms a welding spot here. Under the action of surface tension, the outer side tends to be spherical. During the continuous welding process, the surface curvature tends to be consistent.

[0010] Furthermore, the adjusting device includes a detection component, the front conveyor is located at the welding station, the rear conveyor is located at the detection station, the detection component is located at the detection station, the detection component includes a light-emitting board, a mounting board, a photosensitive layer, a main electrode and an auxiliary electrode, the light-emitting board and the mounting board are tightly connected, the light-emitting board emits an optical path toward the solder joint on the circuit board, the photosensitive layer and the mounting board are tightly connected, the photosensitive layer is located on the reflected optical path of the solder joint, a main electrode and an auxiliary electrode are provided on the photosensitive layer, a plurality of auxiliary electrodes are provided on one side of the main electrode, the plurality of auxiliary electrodes are equally spaced along the length direction of the photosensitive layer, the main electrode and the auxiliary electrodes constitute a detection circuit, and the plurality of detection circuits are connected in parallel.

[0011] After welding is completed, the circuit board enters the inspection station along with the carrier board. When the laser melts the welding wire, welding liquid is formed, and the welding liquid falls off the welding wire and falls on the welding point to form a smooth curved surface. Parallel light is emitted through the light-emitting board, irradiating the spherical surface of the welding point and reflecting. The reflected light irradiates the photosensitive layer, stimulating electron-hole pairs to participate in conduction. At this time, the detection circuit is turned on. During the continuous automatic welding process, the current in the detection circuit tends to be stable. If the welding is poor, false welding and fake welding are formed, the curvature of the smooth surface of the welding point increases or decreases compared with the curvature of the standard welding point. When the surface curvature increases, the landing point of the reflected light on the photosensitive layer is located far away from the main electrode. Due to the extension of the reflected light path, the light loss increases, the light intensity decreases, and the current of the detection circuit weakens; conversely, when the surface curvature decreases, the current of the detection circuit increases.

[0012] Furthermore, two main electrodes are provided, and the two main electrodes are symmetrically distributed about the light-emitting board, and the light-emitting board is circular.

[0013] The light-emitting board adopts a circular design to adapt to the shape of the solder joint. Through two main electrodes, located on both sides of the light-emitting board, it is convenient to perform curvature detection on the entire solder joint.

[0014] Furthermore, the adjusting device also includes a driving component, which is located at the detection station, the driving component is fastened to the conveyor, and the driving component is used to drive the installation plate to move.

[0015] By setting a driving component, when performing inspection of solder joints of different sizes, the mounting plate is moved by the driving component to improve the inspection accuracy.

[0016] Furthermore, the driving assembly includes a support frame, a rack and a driving motor. The support frame and the conveyor are tightly connected. A guide groove is provided on the support frame. The rack and the guide groove are slidably connected. The guide groove is arranged in an arc shape. The driving motor and the support frame are tightly connected. A gear is provided at the output end of the driving motor. The gear and the rack tooth surfaces are meshing.

[0017] The support frame is fixed by a conveyor, the mounting plate is fixed on the rack, the driving motor is fixed on the support frame, the output end drives the gear to rotate, and the gear and rack are meshed, thereby driving the rack to slide along the guide groove. The mounting plate is linked with the rack, and the angle is adjusted to detect welding spots of different sizes, thereby improving the detection efficiency.

[0018] Furthermore, the conveying device also includes a reversing component, which is located at the end of the conveying stroke of the front conveyor. The reversing component includes a reversing cylinder, which is tightly connected to the front conveyor. A push plate is provided at the output end of the reversing cylinder. The displacement output direction of the reversing cylinder is the same as the conveying direction of the rear conveyor.

[0019] Through two conveyors, a multi-station setting is adopted, in which a welding station and an inspection station are set respectively. The front conveyor is located at the welding station, and the rear conveyor is located at the inspection station. The multi-station setting improves the efficiency of automated continuous welding. The conveying directions of the two conveyors are arranged vertically on the horizontal plane. The output displacement of the reversing cylinder drives the push plate to move linearly, and the carrier plate is pushed from the front conveyor to the rear conveyor, so as to directly carry out inspection, thereby improving the efficiency of automated welding and inspection.

[0020] As an optimization, the conveying device further includes a guide frame, and the guide frames are respectively arranged on both sides along the conveying direction of the conveyor. The guide frames are arranged to guide the movement of the carrier plate, thereby affecting the welding accuracy.

[0021] As an optimization, the distance between the two guide frames arranged in the same direction is adapted to the width of the carrier. By setting the distance between the guide frames, the carrier can ensure the accuracy of the forward movement during the forward movement, thereby avoiding repeated positioning and affecting the processing efficiency.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: when the laser melts the welding wire, welding liquid is formed, the welding liquid falls off the welding wire and falls on the welding point to form a smooth curved surface, and parallel light is emitted through the light-emitting board, irradiated on the spherical surface of the welding point, and reflected, and the reflected light is irradiated on the photosensitive layer to excite electron-hole pairs to participate in conduction. At this time, the detection circuit is turned on, and during the continuous automatic welding process, the current on the detection circuit tends to be stable. If the welding is poor, a cold weld or a false weld is formed, so that the curvature of the smooth surface of the welding point increases or decreases compared with the curvature of the standard welding point. When the surface curvature increases, the landing point of the reflected light on the photosensitive layer is located at a position far away from the main electrode. Due to the extension of the reflected light path, the light loss increases, the light intensity decreases, and the current of the detection circuit weakens; conversely, when the surface curvature decreases, the current of the detection circuit increases; the light-emitting board adopts a circular design to adapt to the shape of the welding point, and is located on both sides of the light-emitting board through two main electrodes, so as to facilitate the curvature detection of the entire welding point. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the double conveyor arrangement of the present invention; Figure 3 for Figure 2 A magnified view of a part of the view; Figure 4 for Figure 1 A magnified view of a part B of the view; Figure 5 It is a schematic diagram of the structure of the detection component of the present invention; Figure 6 It is a schematic diagram of the structure of the driving assembly of the present invention; Figure 7 It is a schematic diagram of the structure of the reversing component of the present invention.

[0024] In the figure: 1. conveying device; 11. conveyor; 12. carrier plate; 13. reversing assembly; 131. reversing cylinder; 132. push plate; 14. guide frame; 2. forming device; 21. wire feeder; 22. laser head; 3. adjustment device; 31. detection assembly; 311. light-emitting board; 312. mounting plate; 313. photosensitive layer; 314. main electrode; 315. auxiliary electrode; 32. driving assembly; 321. support frame; 322. rack; 323. gear; 324. driving motor; 4. circuit board. DETAILED DESCRIPTION

[0025] 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.

[0026] Example: Figure 1-Figure 7 As shown, the present invention provides a technical solution for a circuit board welding device with a leak repair function.

[0027] The welding equipment includes a conveying device 1, a forming device 2 and an adjusting device 3. The conveying device 1 is used to convey the circuit board 4. The conveying device 1 and the forming device 2 are tightly connected. The adjusting device 3 and the conveying device 1 are tightly connected. The conveying device 1 includes a conveyor 11. There are two conveyors 11. The conveying directions of the two conveyors 11 are ninety degrees. The conveyor 11 is used to convey a carrier 12, and the carrier 12 is used to fix the circuit board 4.

[0028] The conveying device 1 is used as the main support body for installing other devices. Multi-station welding is performed through two vertically arranged conveyors 11. The conveyor 11 is used to convey the carrier 12, and the carrier 12 is used to quickly clamp and fix the circuit board 4. The forming device 2 is used to weld the local position on the circuit board 4. After welding, the welding point is detected by the adjustment device 3, and the local welding leak position is repaired. At the same time, the cold welded part is re-welded to improve the welding quality.

[0029] Furthermore, multiple forming devices 2 are provided along the conveying direction of the two conveyors 11. The forming device 2 includes a wire feeder 21 and a laser head 22. The wire feeder 21 and the laser head 22 are respectively fastened to the adjacent conveyors 11. The laser head 22 emits light toward the contact portion between the welding wire of the wire feeder 21 and the circuit board 4.

[0030] The wire feeder 21 is fixed on the conveyor 11 and is used to transport the welding wire. When the welding wire is transported to the position to be welded on the circuit board 4, the welding wire at this location is melted by the laser head 22. The melted welding wire forms a welding spot here. Under the action of surface tension, the outer side tends to be spherical. During the continuous welding process, the surface curvature tends to be consistent.

[0031] Furthermore, the adjusting device 3 includes a detection component 31, the front conveyor 11 is located at the welding station, the rear conveyor 11 is located at the detection station, the detection component 31 is located at the detection station, the detection component 31 includes a light-emitting board 311, a mounting board 312, a photosensitive layer 313, a main electrode 314 and an auxiliary electrode 315, the light-emitting board 311 and the mounting board 312 are fastened together, the light-emitting board 311 emits an optical path toward the solder joint on the circuit board 4, the photosensitive layer 313 and the mounting board 312 are fastened together, the photosensitive layer 313 is located on the reflected optical path of the solder joint, the photosensitive layer 313 is provided with a main electrode 314 and an auxiliary electrode 315, a plurality of auxiliary electrodes 315 are provided on one side of the main electrode 314, the plurality of auxiliary electrodes 315 are evenly spaced along the length direction of the photosensitive layer 313, the main electrode 314 and the auxiliary electrode 315 constitute a detection circuit, and the plurality of detection circuits are connected in parallel.

[0032] After welding is completed, the circuit board 4 enters the detection station along with the carrier board 12. When the laser melts the welding wire, welding liquid is formed, and the welding liquid falls off the welding wire and falls on the welding point to form a smooth curved surface. Parallel light is emitted through the light-emitting board 311, irradiating the spherical surface of the welding point and reflecting. The reflected light irradiates the photosensitive layer 313, exciting electron-hole pairs to participate in conduction. At this time, the detection circuit is turned on. During the continuous automatic welding process, the current on the detection circuit tends to be stable. If the welding is poor, a virtual solder joint or a false solder joint is formed, so that the curvature of the smooth surface of the welding point increases or decreases compared with the curvature of the standard welding point. When the surface curvature increases, the landing point of the reflected light on the photosensitive layer 313 is located at a position far away from the main electrode 314. Due to the extension of the reflected light path, the light loss increases, the light intensity decreases, and the current of the detection circuit decreases; conversely, when the surface curvature decreases, the current of the detection circuit increases.

[0033] Furthermore, two main electrodes 314 are provided, and the two main electrodes 314 are symmetrically distributed with respect to the light-emitting plate 311 , and the light-emitting plate 311 is circular.

[0034] The light-emitting board 311 is circular in design and adapted to the shape of the solder joint. The two main electrodes 314 are respectively located on both sides of the light-emitting board 311, so as to facilitate the curvature detection of the entire solder joint.

[0035] Furthermore, the adjusting device 3 also includes a driving assembly 32, which is located at the detection station. The driving assembly 32 is fastened to the conveyor 11, and the driving assembly 32 is used to drive the mounting plate 312 to move.

[0036] By providing the driving assembly 32 , when inspecting solder joints of different sizes, the mounting plate 312 is moved by the driving assembly 32 , thereby improving the inspection accuracy.

[0037] Furthermore, the driving assembly 32 includes a support frame 321, a rack 322 and a driving motor 324. The support frame 321 is firmly connected to the conveyor 11. A guide groove is provided on the support frame 321. The rack 322 and the guide groove are slidably connected. The guide groove is arranged in an arc shape. The driving motor 324 is firmly connected to the support frame 321. A gear 323 is provided at the output end of the driving motor 324. The tooth surfaces of the gear 323 and the rack 322 are meshing.

[0038] The support frame 321 is fixed by the conveyor 11, the mounting plate 312 is fixed on the rack 322, the driving motor 324 is fixed on the support frame 321, and the output end drives the gear 323 to rotate, and the gear 323 and the rack 322 are engaged, thereby driving the rack 322 to slide along the guide groove, and the mounting plate 312 is linked with the rack 322. Through angle adjustment, welding spots of different sizes are detected to improve detection efficiency.

[0039] Furthermore, the conveying device 1 also includes a reversing component 13, which is located at the end of the conveying stroke of the front conveyor 11. The reversing component 13 includes a reversing cylinder 131, which is tightly connected to the front conveyor 11. A push plate 132 is provided at the output end of the reversing cylinder 131, and the displacement output direction of the reversing cylinder 131 is the same as the conveying direction of the rear conveyor 11.

[0040] Through two conveyors 11, a multi-station setting is adopted, and a welding station and a detection station are set respectively. The position of the front conveyor 11 is the welding station, and the position of the rear conveyor 11 is the detection station. The multi-station setting is used to improve the efficiency of automated continuous welding. The conveying directions of the two conveyors 11 are arranged vertically on the horizontal plane. The displacement is output by the reversing cylinder 131, which drives the push plate 132 to move linearly, and the carrier plate 12 is pushed from the front conveyor 11 to the rear conveyor 11, so as to directly perform detection, thereby improving the efficiency of automated welding and detection.

[0041] As an optimization, the conveying device 1 further includes a guide frame 14, and the guide frames 14 are respectively provided on both sides along the conveying direction of the conveyor 11. The guide frames 14 are provided to guide the movement of the carrier plate 12, thereby affecting the welding accuracy.

[0042] As an optimization, the distance between the two guide frames 14 arranged in the same direction is adapted to the width of the carrier 12. By setting the spacing between the guide frames 14, the carrier 12 can ensure the accuracy of the forward movement during the forward movement, thereby avoiding repeated positioning and affecting the processing efficiency.

[0043] The working principle of the present invention is as follows: when the laser melts the welding wire, welding liquid is formed, and the welding liquid falls off the welding wire and falls on the welding point to form a smooth curved surface. Parallel light is emitted through the light-emitting board 311, irradiated on the spherical surface of the welding point, and reflected. The reflected light is irradiated on the photosensitive layer 313, and electron-hole pairs are excited to participate in conduction. At this time, the detection circuit is turned on. During the continuous automatic welding process, the current on the detection circuit tends to be stable. If the welding is poor, a virtual solder joint or a false solder joint is formed, so that the curvature of the smooth surface of the welding point increases or decreases compared with the curvature of the standard welding point. When the surface curvature increases, the falling point of the reflected light on the photosensitive layer 313 is located at a position far away from the main electrode 314. Due to the extension of the reflected light path, the light loss increases, the light intensity decreases, and the current of the detection circuit is weakened; conversely, when the surface curvature decreases, the current of the detection circuit increases; the light-emitting board 311 adopts a circular design to adapt to the shape of the welding point, and two main electrodes 314 are respectively located on both sides of the light-emitting board 311, so as to facilitate the curvature detection of the entire welding point.

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A circuit board welding device with a leak repair function, characterized in that: The welding device comprises a conveying device (1), a forming device (2) and an adjusting device (3); the conveying device (1) is used to convey a circuit board (4); the conveying device (1) and the forming device (2) are tightly connected; the adjusting device (3) and the conveying device (1) are tightly connected; the conveying device (1) comprises a conveyor (11); two conveyors (11) are provided; the conveying directions of the two conveyors (11) are 90 degrees; the conveyor (11) is used to convey a carrier board (12); the carrier board (12) is used to fix the circuit board (4).

2. A circuit board welding device with a leak repair function according to claim 1, characterized in that: The molding device (2) is provided with a plurality of molding devices (2) along the conveying direction of the two conveyors (11), and the molding device (2) comprises a wire feeder (21) and a laser head (22), the wire feeder (21) and the laser head (22) being respectively firmly connected to adjacent conveyors (11), and the laser head (22) emits light toward a contact portion between the welding wire of the wire feeder (21) and the circuit board (4).

3. A circuit board welding device with a leak repair function according to claim 2, characterized in that: The regulating device (3) comprises a detection component (31), the conveyor (11) at the front end is located at the welding station, the conveyor (11) at the rear end is located at the detection station, the detection component (31) is located at the detection station, the detection component (31) comprises a light-emitting board (311), a mounting board (312), a photosensitive layer (313), a main electrode (314) and an auxiliary electrode (315), the light-emitting board (311) and the mounting board (312) are fastened together, and the light-emitting board (311) emits a light path toward the circuit board (4). The photosensitive layer (313) and the mounting plate (312) are fastened to each other, the photosensitive layer (313) is located on the reflection light path of the soldering point, a main electrode (314) and an auxiliary electrode (315) are provided on the photosensitive layer (313), a plurality of auxiliary electrodes (315) are provided on one side of the main electrode (314), the plurality of auxiliary electrodes (315) are distributed at equal intervals along the length direction of the photosensitive layer (313), the main electrode (314) and the auxiliary electrodes (315) constitute a detection circuit, and the plurality of detection circuits are connected in parallel.

4. A circuit board welding device with a leak repair function according to claim 3, characterized in that: Two main electrodes (314) are provided, and the two main electrodes (314) are symmetrically distributed with respect to the light-emitting plate (311), and the light-emitting plate (311) is circular.

5. A circuit board welding device with a leak repair function according to claim 4, characterized in that: The adjusting device (3) further comprises a driving assembly (32), wherein the driving assembly (32) is located at the detection station, the driving assembly (32) and the conveyor (11) are tightly connected, and the driving assembly (32) is used to drive the mounting plate (312) to move.

6. A circuit board welding device with a leak repair function according to claim 5, characterized in that: The driving assembly (32) comprises a support frame (321), a rack (322) and a driving motor (324); the support frame (321) and the conveyor (11) are tightly connected; a guide groove is provided on the support frame (321); the rack (322) and the guide groove are slidably connected; the guide groove is arranged in an arc shape; the driving motor (324) and the support frame (321) are tightly connected; a gear (323) is provided at the output end of the driving motor (324); the gear (323) and the rack (322) have tooth surfaces meshing.

7. A circuit board welding device with a leak repair function according to claim 1, characterized in that: The conveying device (1) further comprises a reversing assembly (13), the reversing assembly (13) being located at the end of the conveying stroke of the front conveyor (11), the reversing assembly (13) comprising a reversing cylinder (131), the reversing cylinder (131) being tightly connected to the front conveyor (11), a push plate (132) being provided at the output end of the reversing cylinder (131), and the displacement output direction of the reversing cylinder (131) being the same as the conveying direction of the rear conveyor (11).

8. The circuit board welding equipment with the function of repairing leaked soldering according to claim 7, characterized in that: The conveying device (1) further comprises a guide frame (14), wherein the guide frames (14) are respectively provided on both sides along the conveying direction of the conveyor (11).

9. A circuit board welding device with a leak repair function according to claim 8, characterized in that: The distance between the two guide frames (14) arranged in the same direction is adapted to the width of the carrier plate (12).

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