A pcb circuit board laser welding device

Abstract

The application discloses a kind of pcb circuit board laser welding devices, it is related to circuit board welding technical field;Including welding mounting piece, suction auxiliary piece is installed on the welding mounting piece, and the suction auxiliary piece is used to guide smoke dust;Negative pressure suction piece is installed on the welding mounting piece;Laser calibration piece is installed on the suction auxiliary piece;The laser calibration piece is used to sleeve joint welding device pin;Focal length prompting piece is installed on the laser calibration piece;Conical cover can be used to facilitate the pin of the component to be welded to be positioned;It can ensure that the pin of the component to be welded is aligned with laser welding head, and ensures laser welding heating quality;To solve the problem that the current pcb circuit board laser welding device is not convenient for automatic positioning calibration component pin to be welded, pin skew easily affects laser focusing position.

Description

Technical Field

[0001] This invention relates to the field of circuit board welding technology, specifically to a PCB circuit board laser welding device. Background Technology

[0002] In practical PCB soldering, laser soldering is mainly used in soldering applications with a large number of pins and the presence of heat-sensitive components. Laser soldering provides more concentrated heat, preventing thermal damage to heat-sensitive devices and making soldering safer. Typically, solder paste or solder is pre-applied to the PCB before the laser heats the pins of the components to be soldered, melting the solder and allowing for soldering. However, current PCB laser soldering equipment lacks automatic control for fume extraction and pollution prevention of the laser welding head. Long-term fume contamination of the lens affects its accuracy. Furthermore, it is difficult to automatically position and calibrate the pins of the components to be soldered; misaligned pins directly affect the laser focusing position, impacting the quality of the soldering. Additionally, when soldering large boards, real-time positioning accuracy monitoring is not readily available, and unevenness on the PCB can also affect the laser focusing position.

[0003] Therefore, the present invention proposes a laser welding device for PCB circuit boards. Summary of the Invention

[0004] The purpose of this invention is to provide a PCB laser welding device to solve the problems mentioned in the background art, such as the inconvenience of automatically positioning and calibrating the pins of the components to be welded, and the fact that pin misalignment can easily affect the laser focusing position.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a PCB circuit board laser welding device, comprising a welding mounting component, wherein a suction auxiliary component is mounted on the welding mounting component for guiding fumes; a negative pressure suction component is mounted on the welding mounting component; a laser calibration component is mounted on the suction auxiliary component; the laser calibration component is used to connect to the pins of the welding device; a focus indicator is mounted on the laser calibration component for indicating welding accuracy deviation; the welding mounting component includes: a laser welding head, a welding mounting frame, and a pressing plate, wherein the welding mounting frame is fixedly mounted on the laser welding head; the welding mounting frame has a through hole; the pressing plate is fixedly mounted on the welding mounting frame; the welding mounting frame is used to be mounted on the displacement bracket of a laser welding machine.

[0006] Preferably, the welding mounting component further includes: an electric push rod, a guide tube, and a suction groove. The electric push rod is fixedly mounted on the welding mounting frame, and the output shaft of the electric push rod passes through the pressing plate. The guide tube is fixedly mounted on the bottom end of the laser welding head. A ring of suction grooves is formed on the guide tube. The ring of suction grooves is used to guide smoke and dust.

[0007] Preferably, the suction auxiliary component includes: a suction cylinder, a venting groove, a push rod plate, and a ventilation switch. The suction cylinder is slidably sleeved on the guide cylinder; a push rod plate is fixedly installed on the top of the suction cylinder; the output shaft of the electric push rod is fixedly installed on the push rod plate; the ventilation switch is fixedly installed on the push rod plate; a venting groove is formed on the inner side of the suction cylinder, and the venting groove has a ring structure; the venting groove is located outside a ring of suction groove holes; the bottom of the pressing plate presses the ventilation switch.

[0008] Preferably, the suction auxiliary component further includes: an indicator light and a conductive ring, wherein the indicator light is fixedly mounted on the suction cylinder; and a conductive ring is fixedly sleeved on the outside of the suction cylinder.

[0009] Preferably, the negative pressure suction component includes: a negative pressure fan and a connecting pipe, wherein the negative pressure fan is fixedly installed on a welded mounting frame; one end of the connecting pipe is fixedly installed on the negative pressure fan, and the other end of the connecting pipe is fixedly installed on the suction cylinder, and the connecting pipe communicates with the ventilation slot; the negative pressure fan is electrically connected to a ventilation switch.

[0010] Preferably, the laser calibration component includes: a lifting cylinder, a return spring, and a connecting shell. The lifting cylinder has a hexagonal cylindrical structure. The lifting cylinder is slidably installed below the suction cylinder. A return spring is sleeved on the lifting cylinder. A connecting shell is fixedly installed at the bottom of the lifting cylinder. One end of the return spring is connected to the connecting shell, and the other end of the return spring is fixedly connected to the bottom of the suction cylinder.

[0011] Preferably, the laser calibration component further includes: a conical cover, which is fixedly installed at the bottom of the connecting shell; a conical hole is provided on the inner side of the conical cover; the conical cover is used to sleeve the pins of the welding device; the conical cover and the laser welding head are coaxial.

[0012] Preferably, the laser calibration component further includes: through slots, and two through slots are formed on the conical cover.

[0013] Preferably, the focus indicator includes: an indicator mounting plate and mounting bolts, wherein two mounting bolts are inserted into the indicator mounting plate and are threaded onto the connecting shell respectively; the indicator mounting plate is located on the side of the conductive ring.

[0014] Preferably, the focus indicator further includes: a contact spring, wherein the contact spring is fixedly installed on the inner side of the indicator mounting plate and is located below the conductive ring; the contact spring is used to elastically fit the conductive ring; the conductive ring, the contact spring, and the indicator light are connected in series with a power supply.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention employs a conical shield, which facilitates the positioning of the component leads to be welded on the laser welding head. This ensures alignment between the component leads and the laser welding head, guaranteeing the heating quality of the laser welding and thus ensuring overall welding quality. Simultaneously, the conical shield adheres to the PCB circuit board, preventing excessive solder paste overflow and adhesion to adjacent solder pastes during melting, thus avoiding bridging. A focus indicator is used to help operators understand the clamping height and flatness of the PCB circuit board as the conical shield moves and adheres to the PCB surface. This prevents excessive focus deviation between the component leads and the laser beam from the welding head due to uneven PCB surfaces, which could negatively impact welding quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a PCB circuit board laser welding device according to the present invention;

[0018] Figure 2 This is a schematic diagram of the bottom structure of a PCB circuit board laser welding device according to the present invention;

[0019] Figure 3 This is a schematic diagram of the welding installation component structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the suction auxiliary component structure of the present invention;

[0021] Figure 5 This is a cross-sectional view of the internal structure of a PCB circuit board laser welding device according to the present invention.

[0022] Figure 6 This is a schematic diagram of the laser calibration component structure of the present invention;

[0023] Figure 7 For the present invention Figure 6 Enlarged view of the structure of region B in the middle;

[0024] Figure 8 For the present invention Figure 5 Enlarged view of the structure of region C in the middle;

[0025] Figure 9 This is a schematic diagram of the focal length indicator of the present invention.

[0026] In the diagram: 1. Welding mounting component; 101. Laser welding head; 102. Welding mounting bracket; 1021. Pressing plate; 103. Electric push rod; 104. Guide tube; 1041. Suction slot hole; 2. Suction auxiliary component; 201. Suction tube; 2011. Ventilation slot; 202. Push rod plate; 2021. Ventilation switch; 203. Indicator light; 204. Conductive ring; 3. Negative pressure suction component; 301. Negative pressure fan; 302. Connecting pipe; 4. Laser calibration component; 401. Lifting cylinder; 4011. Return spring; 402. Connecting shell; 403. Conical cover; 4031. Through slot; 5. Focus indicator component; 501. Indicator mounting plate; 5011. Mounting bolt; 502. Electrical contact spring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figures 1 to 9 As shown:

[0029] This invention provides a technical solution: a PCB circuit board laser welding device, including a welding mounting component 1, a suction auxiliary component 2 mounted on the welding mounting component 1 for guiding fumes; a negative pressure suction component 3 mounted on the welding mounting component 1; a laser calibration component 4 mounted on the suction auxiliary component 2; the laser calibration component 4 for connecting to the pins of the welding device; a focus indicator 5 mounted on the laser calibration component 4 for indicating welding accuracy deviation; the welding mounting component 1 includes: a laser welding head 101, a welding mounting frame 102, and a pressing plate 1021; the welding mounting frame 102 is fixedly mounted on the laser welding head 101; the welding mounting frame 102 has a through hole; the pressing plate 1021 is fixedly mounted on the welding mounting frame 102; the welding mounting frame 102 is used to be mounted on the displacement bracket of the laser welding machine.

[0030] The welding mounting component 1 further includes: an electric push rod 103, a guide cylinder 104, and a suction groove 1041. The electric push rod 103 is fixedly mounted on the welding mounting frame 102, and the output shaft of the electric push rod 103 passes through the pressing plate 1021. The guide cylinder 104 is fixedly mounted on the bottom end of the laser welding head 101. A ring of suction grooves 1041 is formed on the guide cylinder 104. The ring of suction grooves 1041 is used to guide smoke and dust. The suction auxiliary component 2 includes: a suction cylinder 201, a ventilation groove 2011, a push rod plate 202, and a ventilation switch 2021. The suction cylinder 201 is slidably sleeved on the guide cylinder 104; a push rod plate 202 is fixedly installed on the top of the suction cylinder 201; the output shaft of the electric push rod 103 is fixedly installed on the push rod plate 202; a ventilation switch 2021 is fixedly installed on the push rod plate 202; a ventilation groove 2011 is provided on the inner side of the suction cylinder 201, and the ventilation groove 2011 has a ring structure; the ventilation groove 2011 is located outside a ring of suction slot holes 1041; the bottom of the pressing plate 1021 presses the ventilation switch 2021; the suction auxiliary component 2 also includes: an indicator light 203 and a conductive ring 20 4. The indicator light 203 is fixedly installed on the suction cylinder 201; a conductive ring 204 is fixedly sleeved on the outside of the suction cylinder 201; the negative pressure suction component 3 includes: a negative pressure fan 301 and a connecting pipe 302, the negative pressure fan 301 is fixedly installed on the welded mounting bracket 102; one end of the connecting pipe 302 is fixedly installed on the negative pressure fan 301, and the other end of the connecting pipe 302 is fixedly installed on the suction cylinder 201, and the connecting pipe 302 connects to the ventilation slot 2011; the negative pressure fan 301 is electrically connected to the ventilation switch 2021, and the welded mounting component 1 can be used for convenient... It enables rapid laser welding heating with minimal heat impact, enhancing safety. Combined with a height-adjustable suction auxiliary component 2, it automatically controls negative pressure fume extraction during welding, preventing long-term contamination of the laser welding head 101 lens by fumes. The automatic activation of negative pressure extraction during welding also avoids unnecessary waste. The automatic fume extraction eliminates the need for manual control, making it more direct and preventing oversights. Welding fumes enter the guide tube 104 and are directly drawn in by a ring of suction slots 1041 before being discharged from the negative pressure fan 301.

[0031] The laser calibration component 4 includes: a lifting cylinder 401, a return spring 4011, and a connecting shell 402. The lifting cylinder 401 has a hexagonal cylindrical structure. The lifting cylinder 401 is slidably installed below the suction cylinder 201. The return spring 4011 is sleeved on the lifting cylinder 401. The connecting shell 402 is fixedly installed at the bottom of the lifting cylinder 401. One end of the return spring 4011 is connected to the connecting shell 402, and the other end of the return spring 4011 is fixedly connected to the bottom of the suction cylinder 201. The laser calibration component 4 also includes: a conical cover 403, which is fixedly installed at the bottom of the connecting shell 402. The conical cover 403 has a conical hole on its inner side. The conical cover 403 is used to sleeve the pins of the welding device. The conical cover 403 and the laser welding head 101 are coaxial. The laser calibration component 4 also includes: a through groove 4031, which has two through grooves 4031. The conical cover 403 can facilitate... The laser welding head 101 is used to position the pins of the components to be welded, ensuring that the pins of the components to be welded are aligned with the laser welding head 101, thus ensuring the heating quality of laser welding and overall welding quality. Simultaneously, the conical cover 403 can adhere to the PCB circuit board, preventing excessive solder paste overflow and adhesion to adjacent solder pastes when the solder paste is melted, further ensuring welding quality and avoiding bridging. When the suction cylinder 201 moves downward, it can move the conical cover 403 to fit over the pins of the components to be welded. The beveled structure of the conical hole on the inner side of the conical cover 403 allows for easy correction of any misalignment of the component pins. Furthermore, as the suction cylinder 201 moves downward, the conical cover 403 can elastically adhere to the PCB circuit board, preventing the overflow of molten solder.

[0032] In Embodiment 2, based on Embodiment 1, the focus indicator 5 includes: a focus indicator mounting plate 501 and mounting bolts 5011. Two mounting bolts 5011 are inserted into the focus indicator mounting plate 501, and the two mounting bolts 5011 are threaded onto the connecting shell 402 respectively. The focus indicator mounting plate 501 is located on the side of the conductive ring 204. The focus indicator 5 also includes: a contact spring 502. A contact spring 502 is fixedly installed on the inner side of the focus indicator mounting plate 501, and the contact spring 502 is located below the conductive ring 204. The contact spring 502 is used to elastically fit the conductive ring 204. The conductive ring 204, the contact spring 502, and the focus indicator 5 are all connected together. The indicator light 203 is connected in series with a power supply. The focal length indicator 5 can help workers understand the clamping height and flatness of the PCB circuit board when the conical cover 403 moves and adheres to the PCB circuit board surface. This avoids excessive focal length deviation between the pins of the components to be soldered on the PCB circuit board and the laser of the laser welding head 101 due to uneven PCB circuit board surface, which would affect the soldering quality. It can also assist in providing light prompts to facilitate timely detection of problems. The structure is simple and direct. When the conical cover 403 moves down and adheres to the PCB circuit board, the power connection spring 502 can be used to provide power connection prompts.

[0033] The working principle of this embodiment is as follows: First, the welding mounting bracket 102 is bolted to the displacement bracket of the laser welding machine. The displacement bracket of the laser welding machine controls the laser welding head 101 to adjust the welding position. When it is necessary to weld the components to be welded on the PCB circuit board, the PCB circuit board with the components to be welded inserted is clamped on the laser welding machine by a fixture. When welding the pins of the components to be welded, the electric push rod 103 is controlled to drive the push rod plate 202, which drives the suction cylinder 201 to move downward. At this time, the ventilation switch 2021 is no longer pressed by the plate 10. 21. Press; at this time, the negative pressure fan 301 can start and perform suction work, sucking through the suction slots 1041 connected by the ventilation slots 2011. The fumes generated by welding enter the guide cylinder 104 and can be directly sucked by the suction slots 1041 and discharged from the negative pressure fan 301. When the suction cylinder 201 moves down, it can drive the conical cover 403 to fit onto the pins of the components to be welded. Utilizing the inclined structure of the conical hole on the inner side of the conical cover 403, it is easy to fit the pins of the components to be welded into the conical cover 403 even if they are misaligned. 3. Perform correction work; simultaneously, as the suction cylinder 201 moves downward, the conical cover 403 can elastically fit against the PCB circuit board. At this time, the lifting cylinder 401 slides on the suction cylinder 201, compressing the return spring 4011; at this time, the contact spring 502 is also driven upward and fits against the side of the conductive ring 204. At this time, the indicator light 203 will light up to indicate that the laser welding head 101 can then normally emit laser to heat the pins of the components to be welded, and the solder will melt. During the process, the through groove 4031 can ensure that the welding fumes can be discharged normally; then it can be electrically controlled. The push rod 103 drives the suction cylinder 201 to move upward and reset, which also drives the conical cover 403 to move upward and separate from the PCB circuit board. Conversely, if the surface flatness of the PCB circuit board deviates greatly, or the clamping height deviates too much, the contact spring 502 will not be able to move upward and fit against the conductive ring 204. Or, because the protruding PCB circuit board squeezes the conical cover 403, the lifting cylinder 401 moves upward too much and slides directly over the surface of the conductive ring 204. In both cases, the indicator light 203 will not be able to keep lit during soldering. At this time, the staff can carry out the inspection work in time.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser welding apparatus for PCB circuit boards, comprising a welding mounting component (1), wherein a suction auxiliary component (2) is mounted on the welding mounting component (1), characterized in that: The suction auxiliary component (2) is used to guide the smoke and dust; a negative pressure suction component (3) is installed on the welding mounting component (1); a laser calibration component (4) is installed on the suction auxiliary component (2). The laser calibration component (4) is equipped with a focal length indicator (5); the focal length indicator (5) is used to indicate welding accuracy deviation; the welding mounting component (1) includes: a laser welding head (101), a welding mounting frame (102) and a pressing plate (1021), wherein the welding mounting frame (102) is fixedly mounted on the laser welding head (101); and the pressing plate (1021) is fixedly mounted on the welding mounting frame (102). The suction auxiliary component (2) includes: a suction cylinder (201); The laser calibration component (4) includes: a lifting cylinder (401), a reset spring (4011), and a connecting shell (402). The lifting cylinder (401) is a hexagonal cylindrical structure. The lifting cylinder (401) is slidably installed below the suction cylinder (201). The reset spring (4011) is sleeved on the lifting cylinder (401). The connecting shell (402) is fixedly installed at the bottom of the lifting cylinder (401). One end of the reset spring (4011) is connected to the connecting shell (402), and the other end of the reset spring (4011) is fixedly connected to the bottom of the suction cylinder (201). The laser calibration component (4) further includes: a conical cover (403), which is fixedly installed at the bottom of the connecting shell (402); the inner side of the conical cover (403) is provided with a conical hole; the conical cover (403) is used to sleeve the pins of the welding device; the conical cover (403) and the laser welding head (101) are coaxial; The laser calibration component (4) further includes: a through groove (4031), and two through grooves (4031) are provided on the conical cover (403). The focus indicator (5) includes: an indicator mounting plate (501) and mounting bolts (5011). Two mounting bolts (5011) are inserted into the indicator mounting plate (501), and the two mounting bolts (5011) are threaded onto the connecting shell (402). The indicator mounting plate (501) is located on the side of the conductive ring (204). The focal length indicator (5) further includes: a contact spring (502), which is fixedly installed on the inner side of the indicator mounting plate (501) and is located below the conductive ring (204); the contact spring (502) is used to elastically fit the conductive ring (204); the conductive ring (204), the contact spring (502) and the indicator light (203) are connected in series with a power supply.

2. The PCB laser welding apparatus according to claim 1, characterized in that: The welding mounting component (1) further includes: an electric push rod (103), a guide tube (104), and a suction groove (1041). The electric push rod (103) is fixedly mounted on the welding mounting frame (102), and the output shaft of the electric push rod (103) passes through the pressing plate (1021). The guide tube (104) is fixedly mounted on the bottom end of the laser welding head (101). A suction groove (1041) is formed on the guide tube (104). The suction groove (1041) is used to guide the smoke and dust.

3. The PCB laser welding apparatus according to claim 2, characterized in that: The suction auxiliary component (2) further includes: a ventilation groove (2011), a push rod plate (202), and a ventilation switch (2021). The suction cylinder (201) is slidably sleeved on the guide cylinder (104). The push rod plate (202) is fixedly installed on the top of the suction cylinder (201). The output shaft of the electric push rod (103) is fixedly installed on the push rod plate (202). The ventilation switch (2021) is fixedly installed on the push rod plate (202). The suction cylinder (201) has a ventilation groove (2011) on its inner side, and the ventilation groove (2011) is a ring structure. The ventilation groove (2011) is located outside a ring of suction slot holes (1041). The bottom of the pressing plate (1021) presses the ventilation switch (2021).

4. The PCB laser welding apparatus according to claim 3, characterized in that: The suction auxiliary component (2) further includes: an indicator light (203) and a conductive ring (204). The indicator light (203) is fixedly installed on the suction cylinder (201). The conductive ring (204) is fixedly sleeved on the outside of the suction cylinder (201).

5. The PCB laser welding apparatus according to claim 3, characterized in that: The negative pressure suction component (3) includes: a negative pressure fan (301) and a connecting pipe (302). The negative pressure fan (301) is fixedly installed on the welding mounting frame (102). One end of the connecting pipe (302) is fixedly installed on the negative pressure fan (301), and the other end of the connecting pipe (302) is fixedly installed on the suction cylinder (201). The connecting pipe (302) is connected to the ventilation slot (2011). The negative pressure fan (301) is electrically connected to the ventilation switch (2021).

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