Circuit board batch welding device

Abstract

The invention discloses a circuit board batch welding device which comprises a rack and further comprises a traction assembly used for straightening a welding wire; the traction assembly comprises a sliding sleeve, a limiting rod, a lead screw, a connecting plate and a gear, the sliding sleeve is slidably connected to the limiting rod, the limiting rod is fixedly connected with the rack, the sliding sleeve is in threaded connection to the lead screw, the lead screw is rotationally connected with the rack, the connecting plate is fixedly connected to the bottom of the sliding sleeve, shafts are symmetrically and rotationally connected to the two sides of the connecting plate, and the gears are arranged on the shafts. A cam is fixedly connected to the bottom of the shaft, and an anti-skid rubber layer is arranged on the cam and used for improving the welding wire clamping stability of the cam. The welding wire can be effectively prevented from being bent.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit board processing, and in particular relates to a circuit board batch welding device. Background Art

[0002] A circuit board is a substrate used to connect and support electronic components. It is welded with conductive circuits and mounting positions of electronic components. It is an indispensable component of electronic equipment and carries signal transmission and power supply between electronic components. In order to increase production efficiency, it is usually necessary to batch weld multiple circuit boards. However, during welding, welding wire often bends, resulting in offset of solder joints. A structure that can avoid welding wire bending is proposed. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a circuit board batch welding device to solve the above problems.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a circuit board batch welding device, including a frame, and also including: a pulling assembly for straightening the welding wire; the pulling assembly includes a sliding sleeve, a limit rod, a screw rod, a connecting plate and a gear, the sliding sleeve is slidably connected to the limit rod, the limit rod is fixedly connected to the frame, the sliding sleeve is threadedly connected to the screw rod, the screw rod is rotatably connected to the frame, the connecting plate is fixedly connected to the bottom of the sliding sleeve, the two sides of the connecting plate are symmetrically rotatably connected with shafts, the bottom of the shaft is fixedly connected with a cam, and the cam is provided with an anti-slip rubber layer for increasing the stability of the cam clamping the welding wire.

[0005] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0006] Further technical solution: a gear is fixedly connected to the top of the shaft, and a damping rubber ring is provided at the connection between the shaft and the connecting plate to increase the damping required to be overcome by the rotating shaft. One end of the screw rod is fixedly connected to the output shaft of the motor, and the motor is fixedly connected to the frame. The two gears can be meshed and connected with the rack during their sliding process, and the rack is connected to the adjustment assembly.

[0007] Further technical solution: The adjustment component includes a base plate, a shaft, a motor A and a laser sensor. Racks are fixedly connected to the two base plates respectively. The base plate is fixedly connected to the shaft. The shaft is rotatably connected to the frame. The other end of the shaft is fixedly connected to the output shaft of motor A. Motor A is fixedly connected to the frame. The laser sensor is fixedly connected to the connecting plate. The laser sensor is connected to motor A for controlling the start and stop of motor A.

[0008] Further technical solution: the frame is symmetrically fixedly connected with connecting frames, and baffles are respectively fixedly connected to the two connecting frames. When the light beam emitted by the laser sensor is blocked by the baffle, the motor A starts synchronously and stops after the substrate rotates a certain degree.

[0009] Further technical solution: A spacer is fixedly connected to the frame, and the inner wall of the spacer is made of smooth gold metal to avoid excessive wear when the welding wire passes through the spacer. A welding wire reel is provided under the spacer, and the welding wire reel is rotatably connected to the frame.

[0010] Further technical solution: The alignment component includes a positioning frame, a sliding sleeve and a screw rod. The positioning frame is symmetrically fixedly connected to the sliding sleeve, the sliding sleeve is fixedly connected to multiple positioning frames, the sliding sleeve is threadedly connected to the screw rod, the screw rod is a screw rod without a self-locking effect, and the screw rod is rotationally connected to the frame.

[0011] Further technical solution: A pulley A is fixedly connected to the screw rod, and the pulley A is connected to the belt transmission. The other side of the belt is connected to the pulley B transmission. A connecting shaft is fixedly connected to the axis of the pulley B, and the connecting shaft is rotatably connected to the frame.

[0012] Further technical solution: cams are symmetrically fixedly connected to the connecting shaft, and base brackets are provided on the upper sides of the two cams. The cams push the base brackets to slide upward during their rotation. The base brackets are fixedly connected to the brackets, and the brackets are slidably connected to the sliding rod.

[0013] Further technical solution: a spring is sleeved on the sliding rod, one end of the spring is fixedly connected to the bracket, the other end of the spring is fixedly connected to the frame, a reel is symmetrically rotatably connected to the base support, any of the reels is fixedly connected to the output shaft of the motor, the motor is fixedly connected to the base support, and the two reels cooperate with each other and are connected to the belt drive.

[0014] Beneficial Effects

[0015] The present invention provides a circuit board batch welding device, which has the following beneficial effects compared with the prior art:

[0016] 1. After the user pulls one end of the welding wire wound on the welding wire reel and passes it through the spacer, the motor is started, so that the screw rod fixedly connected to its output shaft starts to rotate. At this time, the sliding sleeve threaded on the screw rod starts to move linearly along the connection between it and the limit rod, thereby starting to drive the two cams arranged below it to slide toward the welding wire reel. During its sliding process, the laser sensor arranged on the connecting plate first moves to the bottom of the baffle. At this time, the laser beam emitted by the laser sensor is blocked by the connecting frame, so that the motor A starts to start. At this time, the shaft fixedly connected to its output shaft starts to rotate, and drives the base plate fixedly connected to it to start rotating. At this time, the base plate drives the rack fixedly connected thereto to rotate 180°, and the motor A stops after it rotates 180°. At this time, the rack and the gear are on the same horizontal line, so that when the two gears slide to their corresponding When the motor A is on the rack, the two gears begin to roll on it with the cooperation of the rack meshing with it, and drive the shaft fixedly connected at its axis to start rotating. At this time, the two cams fixedly connected to the bottom of the shaft begin to rotate synchronously in the opposite direction, and clamp the welding wire passing through the spacer sleeve after it rotates 180°. At this time, the sleeve continues to slide forward until the laser sensor moves under the other baffle, so that the motor A drives the substrate to continue to rotate 90° and then stops. In this process, the motor starts to reverse, so that the sleeve starts to slide in the opposite direction, and starts to pull the welding wire clamped on the cam, so that the welding wire wound on the welding wire reel is extended to make its length match the total length of multiple circuit boards, and in this process, the welding wire is straightened to avoid bending of the welding wire, resulting in deviation in contact with the welding pad on the circuit board, and after a single welding contact, the welding wire can be pulled again for cyclic welding;

[0017] 2. When the sleeve starts to slide, it can drive the sleeve fixed on it to slide synchronously. At this time, since the screw does not have the characteristic of self-locking, the sleeve can drive the screw connected to it with its thread to start rotating during its sliding process, so that the pulley A fixedly connected to the screw starts to rotate synchronously. At this time, the pulley B starts to rotate synchronously with the pulley A with the cooperation of the belt connected to it, and drives the connecting shaft fixedly connected at its axis to start rotating. At this time, the cams fixedly connected on both sides of the connecting shaft start to rotate synchronously. During its rotation, the protrusion on it gradually disengages from the bottom bracket, thereby stopping supporting the bottom bracket, and the spring starts to rebound at this time. The sliding sleeve is reset to the threaded connection with the screw rod, and the sliding sleeve continues to slide at this time, which drives the screw rod to start rotating in the opposite direction, so that the cam rotates to contact with the bottom bracket, so that the bottom bracket starts to slide upward along the length direction of its sliding rod, thereby pushing the circuit board placed on it to contact with the straightened welding wire, so that the welding wire can fit tightly on the circuit board, so that the welding liquid can accurately drip onto the welding pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is an enlarged schematic diagram of the positioning structure of the present invention.

[0020] Figure 3 It is a side view structural schematic diagram of the present invention.

[0021] Figure 4 It is an enlarged schematic diagram of the rack structure of the present invention.

[0022] Figure 5 It is an enlarged schematic diagram of the reset structure of the present invention.

[0023] Figure 6 It is a schematic cross-sectional view of the overall structure of the present invention.

[0024] Notes on figure marks: frame 101, pulling component 2, adjustment component 3, alignment component 4, sleeve 201, limit rod 202, screw rod 203, connecting plate 204, motor 205, gear 206, shaft 207, cam 208, rack 209, base plate 301, shaft 302, motor A303, laser sensor 304, connecting frame 305, baffle 306, spacer sleeve 307, wire reel 308, positioning frame 401, sleeve 402, screw rod 403, pulley A404, belt 405, pulley B406, connecting shaft 407, cam 408, base support 409, bracket 4001, slide rod 4002, spring 4003, reel 4004, belt 4005. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0027] See also Figures 1 to 6 , provided in one embodiment of the present invention, is a circuit board batch welding device, comprising a frame 101, and further comprising:

[0028] A pulling assembly 2, used for straightening the welding wire;

[0029] The pulling assembly 2 includes a sleeve 201, a limit rod 202, a screw rod 203, a connecting plate 204 and a gear 206. The sleeve 201 is slidably connected to the limit rod 202, the limit rod 202 is fixedly connected to the frame 101, the sleeve 201 is threadedly connected to the screw rod 203, the screw rod 203 is rotatably connected to the frame 101, the connecting plate 204 is fixedly connected to the bottom of the sleeve 201, and the connecting plate 204 is symmetrically rotatably connected to the shaft 207 on both sides. The bottom of the shaft 207 is fixedly connected to a cam 208, and an anti-slip rubber layer is provided on the cam 208 to increase the stability of the cam 208 in clamping the welding wire.

[0030] Specifically, a gear 206 is fixedly connected to the top of the shaft 207, and a damping rubber ring is provided at the connection between the shaft 207 and the connecting plate 204, which is used to increase the damping size that the rotating shaft 207 needs to overcome. One end of the screw rod 203 is fixedly connected to the output shaft of the motor 205, and the motor 205 is fixedly connected to the frame 101. The two gears 206 can be meshed and connected with the rack 209 during their sliding process, and the rack 209 is connected to the adjustment component 3.

[0031] Specifically, the adjustment component 3 includes a substrate 301, a shaft 302, a motor A303 and a laser sensor 304. The two substrates 301 are respectively fixedly connected with racks 209. The substrate 301 is fixedly connected to the shaft 302. The shaft 302 is rotatably connected to the frame 101. The other end of the shaft 302 is fixedly connected to the output shaft of the motor A303. The motor A303 is fixedly connected to the frame 101. The laser sensor 304 is fixedly connected to the connecting plate 204. The laser sensor 304 is connected to the motor A303 for controlling the start and stop of the motor A303.

[0032] Specifically, the frame 101 is symmetrically fixedly connected with connecting frames 305, and baffles 306 are respectively fixedly connected to the two connecting frames 305. When the light beam emitted by the laser sensor 304 is blocked by the baffle 306, the motor A303 is synchronously started and stops after the substrate 301 rotates 180 degrees.

[0033] Specifically, a spacer sleeve 307 is fixedly connected to the frame 101. The inner wall of the spacer sleeve 307 is made of smooth gold metal to avoid excessive wear when the welding wire passes through the spacer sleeve 307. A welding wire reel 308 is provided under the spacer sleeve 307, and the welding wire reel 308 is rotatably connected to the frame 101.

[0034] In the embodiment of the present invention, after the user pulls one end of the welding wire wound on the welding wire reel 308 and passes it through the spacer sleeve 307, the motor 205 is started, so that the screw rod 203 fixedly connected to its output shaft starts to rotate. At this time, the sliding sleeve 201 threadedly connected to the screw rod 203 starts to move linearly along the connection between it and the limit rod 202, thereby starting to drive the two cams 208 arranged below it to slide toward the welding wire reel 308. During its sliding process, the laser sensor 304 arranged on the connecting plate 204 first moves to the bottom of the baffle 306. At this time, the laser beam emitted by the laser sensor 304 is blocked by the connecting frame 305, so that the motor A303 starts to start. At this time, the shaft 302 fixedly connected to its output shaft starts to rotate, and drives the base plate 301 fixedly connected thereto to start rotating. At this time, the base plate 301 drives the rack 209 fixedly connected thereto to rotate 180°, and the motor A303 stops rotating after it rotates 180°. At this time, the rack 209 and the gear 20 6 is in the same horizontal line, so when the two gears 206 slide to the corresponding racks 209, the two gears 206 begin to roll on them with the cooperation of the racks 209 meshing with them, and drive the shaft 207 fixedly connected at its axis to start rotating. At this time, the two cams 208 fixedly connected to the bottom of the shaft 207 begin to rotate synchronously in the opposite direction, and after it rotates 180°, clamp the welding wire passing through the spacer 307. At this time, the sleeve 201 continues to slide forward until the laser sensor 304 moves to the bottom of the other baffle 306, so that the motor A303 drives the substrate 301 to continue to rotate 90° and then stop. In this process, the motor 205 starts to reverse, so that the sleeve 201 starts to slide in the opposite direction, and starts to pull the welding wire clamped on the cam 208, so that the welding wire wound on the welding wire reel 308 is extended to make its length match the total length of multiple circuit boards, and in this process, the welding wire is straightened to avoid bending of the welding wire, resulting in deviation in contact with the welding pads on the circuit boards.

[0035] Specifically, the alignment component 4 includes a positioning frame 401, a sleeve 402 and a screw 403. The positioning frame 401 is symmetrically fixedly connected to the sleeve 201. The sleeve 402 is fixedly connected to multiple positioning frames 401. The sleeve 402 is threadedly connected to the screw 403. The screw 403 is a screw rod without a self-locking effect. The screw 403 is rotatably connected to the frame 101.

[0036] Specifically, a pulley A404 is fixedly connected to the screw rod 403, and the pulley A404 is transmission-connected to the belt 405. The other side of the belt 405 is transmission-connected to the pulley B406. A connecting shaft 407 is fixedly connected to the axis of the pulley B406, and the connecting shaft 407 is rotationally connected to the frame 101.

[0037] Specifically, cams 408 are symmetrically fixedly connected to the connecting shaft 407, and base supports 409 are provided on the upper sides of the two cams 408. The cams 408 push the base supports 409 to slide upward during their rotation. The base supports 409 are fixedly connected to the bracket 4001, and the bracket 4001 is slidably connected to the sliding rod 4002.

[0038] Specifically, a spring 4003 is sleeved on the slide bar 4002, one end of the spring 4003 is fixedly connected to the bracket 4001, and the other end of the spring 4003 is fixedly connected to the frame 101. A reel 4004 is symmetrically rotatably connected to the base support 409, any one of the reels 4004 is fixedly connected to the output shaft of the motor, and the motor is fixedly connected to the base support 409, and the two reels 4004 cooperate with each other and are transmission-connected to the belt 4005. When placing circuit boards in batches, the user can start the motor connected to the base support 409 to make the reel 4004 start to rotate. At this time, the belt 4005 starts to rotate in cooperation with the reel 4004 transmission-connected thereto, so that when the user places the circuit boards thereon in turn, the circuit boards can be transported forward, thereby placing the circuit boards thereon in batches.

[0039] In the embodiment of the present invention, when the sliding sleeve 201 starts to slide, it can drive the sliding sleeve 402 fixed thereon to slide synchronously. At this time, since the screw 403 does not have a self-locking feature, the sliding sleeve 402 can drive the screw 403 threadedly connected thereto to start rotating during its sliding process, thereby causing the pulley A404 fixedly connected to the screw 403 to start rotating synchronously. At this time, the pulley B406 starts to rotate synchronously with the pulley A404 in cooperation with the belt 405 connected thereto for transmission, and drives the connecting shaft 407 fixedly connected at its axis to start rotating. At this time, the cams 408 fixedly connected on both sides of the connecting shaft 407 start to rotate synchronously. During its rotation, the protrusions on it gradually disengage from the base 409, thereby stopping supporting the base 409. At this time, the spring 400 3 begins to rebound and reset, thereby driving the bracket 4001 fixedly connected thereto to slide synchronously. At this time, the bottom bracket 409 begins to slide downward, and when the sliding sleeve 402 is disconnected from the screw rod 403, its relative height is lower than the cam 208 to avoid affecting the sliding of the cam 208. At the same time, during the process of the sliding sleeve 201 pulling the welding wire, the sliding sleeve 402 resets to the threaded connection with the screw rod 403 at a degree. At this time, the sliding sleeve 201 continues to slide, driving the screw rod 403 to start to rotate in the opposite direction, so that the cam 408 rotates at a degree to contact with the bottom bracket 409, so that the bottom bracket 409 starts to slide upward along the length direction of its sliding rod 4002, thereby pushing the circuit board placed thereon to contact the straightened welding wire, so that the welding wire can fit tightly on the circuit board, so that the welding liquid can accurately drip onto the welding pad.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] The fixed connection referred to in this application refers to a connection in which a part or component is fixed without any relative movement, which can be divided into detachable connection and non-detachable connection.

[0042] (1) Removable connection: The parts are fixed together by screws, splines, wedge pins, etc. This connection method can be disassembled for maintenance without damaging the parts. However, the specifications of the connectors used must be correct (such as the length of the bolts, keys, and wedge pins) and they must be properly tightened.

[0043] (2) Non-detachable connection: mainly refers to welding, riveting and tenoning. Since forging, sawing or oxygen cutting are required for disassembly during maintenance or replacement, spare parts generally cannot be reused. At the same time, attention should be paid to process quality, technical inspection and remedial measures (such as calibration, polishing, etc.) during connection.

[0044] The sliding connection referred to in the present application means that the component can slide along a linear trajectory, and the hinged connection referred to in the present application means that the component can rotate along an axial constraint.

[0045] In some cases, the sliding connection and hinge referred to in the present application may also be damped so that the components have the ability to maintain a desired position.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit board batch welding device, comprising a frame (101), characterized in that: Also includes: A pulling assembly (2), used for straightening the welding wire; The pulling assembly (2) comprises a sliding sleeve (201), a limiting rod (202), a screw rod (203), a connecting plate (204) and a gear (206); the sliding sleeve (201) is slidably connected to the limiting rod (202); the limiting rod (202) is fixedly connected to the frame (101); the sliding sleeve (201) is threadedly connected to the screw rod (203); the screw rod (203) is rotatably connected to the frame (101); the connecting plate (204) is fixedly connected to the bottom of the sliding sleeve (201); shafts (207) are symmetrically rotatably connected on both sides of the connecting plate (204); a cam (208) is fixedly connected to the bottom of the shaft (207); an anti-slip rubber layer is provided on the cam (208) for increasing the stability of the cam (208) in clamping the welding wire; the sliding sleeve (201) is connected to the alignment assembly (4).

2. The circuit board batch welding device according to claim 1, characterized in that: A gear (206) is fixedly connected to the top of the shaft (207); a damping rubber ring is provided at the connection between the shaft (207) and the connecting plate (204) for increasing the damping required to be overcome by the rotating shaft (207); one end of the screw rod (203) is fixedly connected to the output shaft of the motor (205); the motor (205) is fixedly connected to the frame (101); the two gears (206) can be meshed and connected with the rack (209) during their sliding process; and the rack (209) is connected to the adjustment component (3).

3. The circuit board batch welding device according to claim 2, characterized in that: The adjustment component (3) comprises a base plate (301), a shaft (302), a motor A (303) and a laser sensor (304); racks (209) are fixedly connected to the two base plates (301) respectively; the base plate (301) is fixedly connected to the shaft (302); the shaft (302) is rotatably connected to the frame (101); the other end of the shaft (302) is fixedly connected to the output shaft of the motor A (303); the motor A (303) is fixedly connected to the frame (101); the laser sensor (304) is fixedly connected to the connecting plate (204); the laser sensor (304) is connected to the motor A (303) and is used to control the start and stop of the motor A (303).

4. The circuit board batch welding device according to claim 3, characterized in that: The frame (101) is symmetrically fixedly connected with a connecting frame (305), and two connecting frames (305) are respectively fixedly connected with a baffle (306). When the light beam emitted by the laser sensor (304) is blocked by the baffle (306), the motor A (303) is synchronously started and stops after the base plate (301) rotates (180) degrees.

5. The circuit board batch welding device according to claim 1, characterized in that: A spacer sleeve (307) is fixedly connected to the frame (101), and the inner wall of the spacer sleeve (307) is made of smooth gold metal material to prevent excessive wear of the welding wire when passing through the spacer sleeve (307). A welding wire reel (308) is provided below the spacer sleeve (307), and the welding wire reel (308) is rotatably connected to the frame (101).

6. The circuit board batch welding device according to claim 1, characterized in that: The alignment component (4) comprises a positioning frame (401), a sliding sleeve (402) and a screw (403); the positioning frame (401) is symmetrically fixedly connected to the sliding sleeve (201); the sliding sleeve (402) is fixedly connected to a plurality of positioning frames (401); the sliding sleeve (402) is threadedly connected to the screw (403); the screw (403) is a lead screw without a self-locking effect; and the screw (403) is rotationally connected to the frame (101).

7. The circuit board batch welding device according to claim 6, characterized in that: A pulley A (404) is fixedly connected to the screw rod (403), and the pulley A (404) is connected to a belt (405) in a transmission manner. The other side of the belt (405) is connected to a pulley B (406) in a transmission manner. A connecting shaft (407) is fixedly connected to the axis of the pulley B (406), and the connecting shaft (407) is connected to the frame (101) in a rotation manner.

8. The circuit board batch welding device according to claim 7, characterized in that: Cams (408) are symmetrically fixedly connected to the connecting shaft (407), and base supports (409) are provided on the upper sides of the two cams (408). The cams (408) push the base supports (409) to slide upwards during their rotation. The base supports (409) are fixedly connected to the bracket (4001), and the bracket (4001) is slidably connected to the sliding rod (4002).

9. The circuit board batch welding device according to claim 8, characterized in that: A spring (4003) is sleeved on the slide bar (4002), one end of the spring (4003) is fixedly connected to the bracket (4001), and the other end of the spring (4003) is fixedly connected to the frame (101). A reel (4004) is symmetrically rotatably connected to the base support (409), any of the reels (4004) is fixedly connected to the output shaft of the motor, and the motor is fixedly connected to the base support (409), and the two reels (4004) cooperate with each other and are connected to the belt (4005) for transmission.

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