PCB welding method for LED driving power supply

Abstract

The invention relates to the technical field of circuit board welding, in particular to a PCB welding method for an LED driving power supply, comprising two conveying track frames, the lower ends of the conveying track frames are mounted on a bottom plate placed on the ground, a positioning hydraulic cylinder is mounted at the top of the bottom plate, and a connecting frame is mounted at the top of the positioning hydraulic cylinder; a positioning part and a supporting part are installed at the left end and the right end of the connecting frame respectively and located between the two conveying track frames, and a pressing part is arranged above the supporting part. The circuit board is conveyed in an automatic mode, all-directional positioning in the front-back and left-right directions is automatically conducted on the circuit board when the circuit board is located at the welding position, meanwhile, interface type electronic elements are stably clamped, the electronic elements are inserted into the welding position of the circuit board in the automatic mode, and the welding efficiency of the circuit board is improved. And the plugging precision and the welding precision of the electronic component are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board welding, and specifically to a PCB board welding method for an LED driving power supply. Background Art

[0002] An LED driving power supply is a device that provides the required electrical energy for LED lighting equipment. The LED driving power supply has the advantages of high conversion efficiency, constant current or constant voltage output, perfect protection function, good voltage drop stability, etc., and is widely used in the fields of indoor lighting, outdoor lighting, automotive lighting, display screens, and electronic devices. The core of the LED driving power supply is a PCB board, also called a circuit board. Different electronic components are welded on the circuit board. Regular electronic components can be automatically surface-mounted and welded through SMT technology. However, for irregular and heavy electronic components, they are mostly placed by manual insertion. For example, interface-type electronic components are mostly inserted and welded manually.

[0003] Since the pins of interface-type electronic components are relatively dense and the insertion accuracy requirements are relatively high, when manually inserting the electronic components, there will be problems such as poor welding quality of the circuit board due to the deviation of the insertion position between the circuit board and the electronic components. In response to the above problems, the prior art with the publication number CN209050328U discloses a PCB circuit board welding fixture. This solution completes the welding action of the electronic components by clamping the electronic components and the circuit board separately.

[0004] Although the above technical solution can weld the electronic components, the problem of positioning and inserting the interface-type electronic components on the circuit board still cannot be solved. Moreover, when inserting the electronic components, not only the circuit board needs to be clamped, but also its front-back position and left-right position need to be synchronously positioned. The above technical solution cannot achieve the above functions, which leads to poor welding quality of the electronic components. At the same time, the electronic components cannot be pressed after being inserted, resulting in deviation or virtual welding at the welding position of the electronic components. Summary of the Invention

[0005] The present invention adopts the following technical solutions to solve the above technical problems. A PCB board welding method for an LED driving power supply is mainly completed in cooperation with a circuit board automatic welding device. The circuit board automatic welding device includes two transfer track frames. Transfer belts for transferring the circuit board are arranged on the opposite sides of the two transfer track frames. The lower ends of the transfer track frames are installed on a bottom plate placed on the ground. A welding gun is arranged above the right end of the bottom plate and between the two transfer track frames. A positioning hydraulic cylinder is installed on the top of the bottom plate. A connecting frame is installed on the top of the positioning hydraulic cylinder. A positioning component and a supporting component are respectively installed at the left and right ends of the connecting frame. The positioning component and the supporting component are both located between the two transfer track frames. A pressing component is arranged above the supporting component.

[0006] The positioning component includes a positioning support plate locked to the left end of the connecting frame, and a blocking plate installed on the top of the positioning support plate for positioning the position of the circuit board.

[0007] The pressing-down component includes a locking support plate installed on the outer free end. The bottom of the locking support plate is provided with a pressing-down support plate through a pressing-down air cylinder. The front and rear ends of the pressing-down support plate are both penetrated and connected with pressing-down elastic columns. The bottoms of the two pressing-down elastic columns are both connected to the upper side of the clamping support plate. Clamping chutes are respectively arranged at the left and right ends of the clamping support plate. A clamping plate is installed in each clamping chute through a compression spring. The upper and lower ends of the clamping plate both extend outside the clamping chute. The two clamping plates clamp the electronic component under the action of the compression spring.

[0008] An unlocking part is installed at the bottom of the pressing-down support plate. The unlocking part is located between the two clamping plates. A fastening part is arranged on the side surface of the unlocking part corresponding to the clamping plate. The unlocking part is used for releasing the clamping of the clamping plate on the electronic component after the electronic component is inserted into the circuit board, and the fastening part is used for clamping and positioning the position of the clamping plate after the clamping is released.

[0009] The supporting component is used for supporting the circuit board when the pressing-down component presses the electronic component onto the circuit board.

[0010] In addition, the PCB board welding method for the LED driving power supply specifically includes the following steps:

[0011] Step 1, electronic component clamping: Clamp the electronic component to be welded through the pressing-down component;

[0012] Step 2, circuit board conveying: The conveying belt on the conveying track rack 1 drives the circuit board to move from right to left, and the left side surface of the circuit board moves to a position close to the positioning component;

[0013] Step 3, circuit board positioning and support: Control the positioning hydraulic cylinder to perform an extending movement. The positioning component blocks the circuit board and positions its position. The supporting component can support the position of the right end of the circuit board;

[0014] Step 4, circuit board welding: Insert the electronic component into the corresponding position on the circuit board through the pressing-down component, and weld the electronic component to the circuit board through a welding torch.

[0015] Preferably, the blocking plate is in a "mountain" shape structure, the height of the vertical section in the middle is higher than the heights of the other two vertical sections, and chamfers are arranged at the upper ends of the two vertical sections on both sides of the blocking plate corresponding to the side surface of the connecting frame.

[0016] Preferably, central opposite sides of the two conveying track frames are each provided with a rectifying installation groove, a T-shaped pressing plate is slidably installed in the rectifying installation groove, a longitudinal section of the T-shaped pressing plate passes through the conveying track frame and extends to the outside thereof, a rectifying plate is installed on a side of the T-shaped pressing plate corresponding to the connecting frame through a rectifying elastic column, and a transverse section of the T-shaped pressing plate is installed on a side wall of the rectifying installation groove through a return spring.

[0017] Preferably, front and rear ends of a bottom of the positioning support plate are each installed with a follower pressing frame, one end of the follower pressing frame away from the positioning support plate extends below the T-shaped pressing plate, and the follower pressing frame corresponds to an end of the T-shaped pressing plate located outside the conveying track frame. A mating chamfer is provided at each end where the follower pressing frame and the T-shaped pressing plate are close to each other.

[0018] Preferably, the supporting member includes a supporting support plate installed at a right end of the connecting frame, front and rear ends of a top of the supporting support plate are each installed with a supporting platform capable of adjusting a front and rear position, and a welding torch is installed in a middle of a left end of the supporting support plate.

[0019] Preferably, the locking support plate includes a mounting top plate installed at an external free end, a T-shaped sliding groove extending left and right is formed at a bottom of the mounting top plate, a sliding support plate slidably connected to the T-shaped sliding groove is provided on a lower side of the mounting top plate, an upper end of the sliding support plate is connected to an upper end of a downward pressing air cylinder, and a telescopic end of a pushing air cylinder installed at a bottom of the mounting top plate is connected to a left end of the sliding support plate.

[0020] Preferably, front and rear ends of the sliding support plate are each installed with a follower moving frame, a right end of the connecting frame is a sliding telescopic structure, a lower end of the follower moving frame bypasses the conveying track frame and is connected to a telescopic end of the connecting frame, and a vertical section of the follower moving frame is a sliding telescopic structure.

[0021] Preferably, the unlocking member is an equilateral trapezoid structure wider at the top and narrower at the bottom; the fastening member includes a fastening groove installed on opposite side faces of an upper end of the clamping plate, and fastening protrusions arranged on left and right sides of an upper end of the unlocking member. The fastening protrusions are engaged with the fastening groove to position the clamping plate when it moves to the upper end of the unlocking member.

[0022] Preferably, cross sections of the fastening protrusions and the fastening groove are both triangular structures, and a telescopic force of the compression spring is greater than a telescopic force of the downward pressing elastic column.

[0023] Preferably, downward pressing rods are symmetrically installed at a bottom of the sliding support plate, lower ends of the downward pressing rods pass through the downward pressing support plate, and the downward pressing rods are located outside the fastening protrusions. A front side of the clamping plate is a flared structure.

[0024] The beneficial effects of the present invention are as follows: First, the present invention uses an automated method to convey the circuit board and automatically performs all-round positioning of the circuit board in the front, back, left, and right directions when the circuit board is in the welding position. At the same time, the present invention stably clamps the electronic components of the interface type and inserts the electronic components into the welding position of the circuit board in an automatic manner, increasing the insertion accuracy and welding accuracy of the electronic components.

[0025] Second, in the present invention, the baffle plate has a "mountain" shape structure. When the circuit board moves to a position close to the baffle plate, the control baffle plate will move upward. The vertical section in the middle first contacts the left side of the circuit board. As the baffle plate continues to move upward, the vertical sections on both sides of the baffle plate calibrate the position of the circuit board, and then a multi-point positioning method is adopted to prevent the circuit board from skewing, increasing the positioning accuracy of the positioning component for the circuit board.

[0026] Third, the pressing component in the present invention is used to stably clamp the single electronic component and automatically ends the clamping action on it after the electronic component is inserted, preventing the inserted electronic component from being lifted again due to the electronic component being always in the clamped state.

[0027] Fourth, after the electronic component is inserted into the circuit board, as the pressing cylinder continues to extend, at this time, under the action of the pressing elastic column, the pressing support plate will continue to move downward, so that the clamping support plate applies a downward pressure to the electronic component, thereby preventing the situation that the electronic component is not inserted in place, and the support component can prevent the circuit board from being overly deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the drawings and embodiments.

[0029] Figure 1 is a schematic structural diagram of the automatic circuit board welding device in the present invention.

[0030] Figure 2 is a front plan view of the automatic circuit board welding device in the present invention.

[0031] Figure 3 is a schematic structural diagram between the conveying track frame, positioning hydraulic cylinder, connecting frame and positioning component on the automatic circuit board welding device in the present invention.

[0032] Figure 4 is a top view of the present invention after partially removing the conveying track frame above the rectifying installation groove.

[0033] Figure 5 is a schematic structural diagram between the conveying track frame, positioning hydraulic cylinder, connecting frame, support component and pressing component on the automatic circuit board welding device in the present invention.

[0034] Figure 6It is a schematic structural diagram of the pressing component of the present invention.

[0035] Figure 7 It is a schematic structural diagram of the pressing component of the present invention after removing the locking support plate.

[0036] Figure 8 It is a schematic structural diagram between the circuit board and the electronic component of the present invention.

[0037] In the figure: 1, transfer track frame; 2, welding torch; 3, positioning hydraulic cylinder; 4, positioning component; 5, supporting component; 6, pressing component; 11, bottom plate; 12, alignment installation groove; 13, T-shaped extrusion plate; 14, alignment elastic column; 15, alignment plate; 16, return spring; 31, connecting frame; 41, positioning support plate; 42, blocking plate; 43, follower extrusion frame; 51, supporting support plate; 52, supporting platform; 61, locking support plate; 62, pressing support plate; 63, pressing elastic column; 64, clamping support plate; 65, clamping chute; 66, extrusion spring; 67, clamping plate; 68, unlocking part; 69, fastening part; 611, installation top plate; 612, T-shaped chute; 613, sliding support plate; 614, pushing air cylinder; 615, follower moving frame; 616, pressing rod; 691, fastening groove; 692, fastening protrusion. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Refer to Figure 1 , Figure 2 and Figure 8, A soldering method for a PCB board used in an LED driving power supply, which is mainly completed in cooperation with an automatic circuit board soldering device. The automatic circuit board soldering device includes two transfer track frames 1. Transfer belts for transferring the circuit board are provided on the opposite sides of the two transfer track frames 1. The lower ends of the transfer track frames 1 are installed on a bottom plate 11 placed on the ground. Above the right end of the bottom plate 11 and between the two transfer track frames 1, there is a soldering gun 2. A positioning hydraulic cylinder 3 is installed on the top of the bottom plate 11. A connecting frame 31 is installed on the top of the positioning hydraulic cylinder 3. A positioning component 4 and a supporting component 5 are respectively installed at the left and right ends of the connecting frame 31. Both the positioning component 4 and the supporting component 5 are located between the two transfer track frames 1. Above the supporting component 5, there is a pressing component 6. The supporting component 5 is used to support the circuit board when the pressing component 6 presses the electronic component onto the circuit board. The present invention can insert and solder pin-type interface electronic components, increasing the insertion accuracy and soldering accuracy of the electronic components.

[0040] It should be noted that border plates are provided on both sides of the printed circuit board. There is a break point structure between the circuit board body and the border plates. Therefore, when plug-in electronic components are inserted into the circuit board, the circuit board needs to be supported. And before the circuit board inserts the electronic components, solder paste is applied. The soldering gun 2 can solder the electronic components to the circuit board.

[0041] It can be understood that the soldering gun 2 in this embodiment is a hot air gun. Through hot air, the solder paste at the position where the circuit board needs to be soldered can be melted to realize the soldering of the electronic components. And the soldering gun 2 can move back and forth. The soldering gun 2 is a prior art and will not be elaborated too much in this embodiment.

[0042] Refer to Figure 3 , The positioning component 4 includes a positioning support plate 41 locked to the left end of the connecting frame 31 and a blocking plate 42 installed on the top of the positioning support plate 41 to position the position of the circuit board. The positioning component 4 can position the left and right positions of the circuit board, preventing the deviation of the position of the electronic component and the circuit board, and avoiding the bending or improper insertion of the pins of the electronic component.

[0043] Continue to refer to Figure 3 , In order to increase the positioning accuracy of the positioning component 4 for the circuit board, in this embodiment, the blocking plate 42 is in a "mountain" shape structure. The height of the vertical section in the middle is higher than the height of the other two vertical sections. Chamfers are provided at the upper ends of the vertical sections on both sides of the blocking plate 42 corresponding to the side of the connecting frame 31. When the circuit board moves to a position close to the blocking plate 42, the positioning hydraulic cylinder 3 is controlled to extend. At this time, the blocking plate 42 will move upward, and the vertical section in the middle will first contact the left side of the circuit board. As the blocking plate 42 continues to move upward, the vertical sections on both sides of the blocking plate 42 calibrate the position of the circuit board, and then prevent the circuit board from skewing by means of multi-point positioning.

[0044] Refer to Figure 3 、 Figure 4 Since the clearance between both sides of the circuit board and the transfer rail frame 1 is too small during the transfer process, it will affect the transfer. Therefore, there is a certain clearance between the circuit board and the transfer rail frame 1. And the pin size of the electronic component is small, and a small deviation in position will also cause the phenomenon that the electronic component cannot be plugged in. Therefore, the present invention adopts the method of positioning the front and rear positions of the circuit board after the left end of the circuit board is positioned, so as to increase the positioning accuracy of the circuit board and improve the welding accuracy of the electronic component in the later stage. In the middle of the opposite sides of the two transfer rail frames 1, a rectifying installation groove 12 is opened. A T-shaped extrusion plate 13 is slidably installed in the rectifying installation groove 12. The longitudinal section of the T-shaped extrusion plate 13 passes through the transfer rail frame 1 and extends to the outside thereof. A rectifying plate 15 is installed on the side of the T-shaped extrusion plate 13 corresponding to the connecting frame 31 through a rectifying elastic column 14. The transverse section of the T-shaped extrusion plate 13 is installed on the side wall of the rectifying installation groove 12 through a return spring 16. At the front and rear ends of the bottom of the positioning support plate 41, a follower extrusion frame 43 is installed. The end of the follower extrusion frame 43 away from the positioning support plate 41 extends below the T-shaped extrusion plate 13, and the follower extrusion frame 43 corresponds to the end of the T-shaped extrusion plate 13 located outside the transfer rail frame 1. Specifically, when the blocking plate 42 moves upward and its vertical sections are in contact with the left side of the circuit board, at this time, the follower extrusion frame 43 will be in contact with the T-shaped extrusion plate 13. The blocking plate 42 continues to move upward, and then drives the front and rear rectifying plates 15 to squeeze the front and rear sides of the circuit board by pushing the T-shaped extrusion plate 13. Under the action of the rectifying elastic column 14, the rectifying plate 15 can make the distances between the front and rear sides of the circuit board and the transfer rail frame 1 at the corresponding positions equal, thereby completing the positioning of the front and rear positions of the circuit board.

[0045] It should be noted that, refer to Figure 3 Both ends of the follower extrusion frame 43 and the T-shaped extrusion plate 13 that are close to each other are provided with mating chamfers. This setting enables the follower extrusion frame 43 to smoothly push the T-shaped extrusion plate 13 to move inward, increasing the synchronism when the front and rear T-shaped extrusion plates 13 move inward.

[0046] Refer to Figure 1 and Figure 5, the support member 5 includes a support plate 51 mounted at the right end of the connecting frame 31. At both the front and rear ends of the top of the support plate 51, there are support platforms 52 that can be adjusted in the front and rear positions. The soldering gun 2 is mounted in the middle of the left end of the support plate 51. The support member 5 can support both the front and rear sides of the insertion position of the circuit board and the electronic components, preventing the circuit board from being deformed too much during the insertion of the electronic components. The support platform 52 that can be adjusted in the front and rear positions can adjust the support position of the circuit board, preventing the position of the circuit board corresponding to the support platform 52 from being provided with solder paste or other electronic components, resulting in the support platform 52 being unable to implement support. Specifically, when the front and rear positions of the circuit board are positioned, at this time, the upper surface of the support platform 52 corresponds to the upper surface of the conveyor belt in height, and the support platform 52 supports the circuit board.

[0047] Refer to Figure 5 , in some embodiments, the support platform 52 is of a T-shaped structure. The support platform 52 is slidably mounted in the front and rear directions on the top of the support plate 51. Position adjustment holes are uniformly arranged in the front and rear directions of the vertical section of the support platform 52. A locking plug is provided on the support plate 51 and on the right side of the support platform 52. By inserting the locking plug into the adjustment holes at different positions of the support platform 52, the front and rear position adjustment and position locking of the support platform 52 are completed.

[0048] Refer to Figure 1 , Figure 6 , Figure 7, the pressing-down component 6 includes a locking support plate 61 installed on the outer free end. The bottom of the locking support plate 61 is provided with a pressing-down support plate 62 through a pressing-down air cylinder. The front and rear ends of the pressing-down support plate 62 are both connected through pressing-down elastic columns 63. The bottoms of the two pressing-down elastic columns 63 are both connected to the upper side of the clamping support plate 64. Clamping chutes 65 are opened at the left and right ends of the clamping support plate 64. A clamping plate 67 is installed in each clamping chute 65 through a compression spring 66. The front side of the clamping plate 67 is a flared structure. The upper and lower ends of the clamping plate 67 both extend outside the clamping chute 65. The two clamping plates 67 clamp the electronic component under the action of the compression spring 66. The bottom of the pressing-down support plate 62 is provided with an unlocking part 68. The unlocking part 68 is located between the two clamping plates 67. A fastening part 69 is arranged on the side surface of the unlocking part 68 corresponding to the clamping plate 67. The unlocking part 68 is used to release the clamping of the clamping plate 67 on the electronic component after the electronic component is inserted into the circuit board. The fastening part 69 is used to fasten and position the position of the clamping plate 67 after the clamping is released. The pressing-down component 6 is used to stably clamp the single component and automatically end the clamping action on it after the electronic component is inserted, preventing the inserted electronic component from being lifted again because the electronic component is always in a clamped state. Specifically, first, the electronic component is placed between the lower ends of the two clamping plates 67. The clamping plate 67 can clamp the electronic component under the action of the compression spring 66. When the support platform 52 completes the support of the circuit board, the pressing-down air cylinder is controlled to extend, so that the electronic component can be inserted into the circuit board. As the pressing-down air cylinder continues to extend, the clamping support plate 64 will apply a downward pressure to the upper side of the electronic component. At this time, under the action of the pressing-down elastic column 63, the pressing-down support plate 62 will continue to move downward. Then, the unlocking part 68 unlocks the clamping plate 67, so that the clamping plate 67 ends the clamping of the electronic component. At the same time, the fastening part 69 makes the clamping plate 67 not perform the clamping action again. Then, the pressing-down air cylinder contracts to the initial position to complete the insertion action of the electronic component.

[0049] Refer to Figure 1 , Figure 2 and Figure 6, when performing the plugging action of electronic components on circuit boards of different models, there will be differences in the left and right positions of the circuit board plugging. Therefore, in this embodiment, the applicability of the present invention is increased by adjusting the left and right positions of the support member 5 and the pressing member 6. The locking support plate 61 includes a mounting top plate 611 installed at the external free end. A T-shaped chute 612 extending left and right is provided at the bottom of the mounting top plate 611. A sliding support plate 613 slidably connected to the T-shaped chute 612 is provided on the lower side of the mounting top plate 611. The lower side of the sliding support plate 613 is connected to the upper end of the pressing cylinder. The left end of the sliding support plate 613 is connected to the telescopic end of a pushing cylinder 614 installed at the bottom of the mounting top plate 611; Follow-up moving frames 615 are installed at both the front and rear ends of the sliding support plate 613. The right end of the connecting frame 31 is a sliding telescopic structure. The lower end of the follow-up moving frame 615 bypasses the transfer track frame 1 and is connected to the telescopic end of the connecting frame 31, and the vertical section of the follow-up moving frame 615 is a sliding telescopic structure. When it is necessary to adjust the left and right plugging positions of the electronic components, by controlling the pushing cylinder 614 to perform telescopic movement, the sliding support plate 613 moves left and right, and the left and right positions of the support member 5 can be synchronously adjusted through the follow-up moving frame 615. It should be noted that the external free end is the position where the mounting top plate 611 can be positioned and locked, such as positions like the wall top plate, etc.

[0050] Refer to Figure 7 , in this embodiment, the unlocking member 68 is an equilateral trapezoid structure with a wider upper part and a narrower lower part; when the clamping support plate 64 applies a downward pressure to the electronic component, as the pressing cylinder extends, the downward pressing elastic column 63 will contract, causing the downward pressing support plate 62 to continue to move downward. The equilateral trapezoid-shaped unlocking member 68 contacts the upper end of the clamping plate 67 and pushes the clamping plates 67 to move away from each other, releasing the clamping of the electronic component by the clamping plates 67.

[0051] Refer to Figure 7, the clamping and fixing member 69 includes clamping and fixing grooves 691 installed on the opposite side surfaces at the upper end of the clamping plate 67, and clamping and fixing protrusions 692 arranged on the left and right sides at the upper end of the unlocking member 68. The clamping and fixing protrusions 692 cooperate with the clamping and fixing grooves 691 to position the unlocking member 68 when the clamping plate 67 moves to the upper end of the unlocking member 68; both the cross-sections of the clamping and fixing protrusions 692 and the clamping and fixing grooves 691 are triangular structures, and the elastic force of the compression spring 66 is greater than the elastic force of the downward pressing elastic column 63; the bottom of the sliding support plate 613 is symmetrically installed with downward pressing rods 616. The lower ends of the downward pressing rods 616 pass through the downward pressing support plate 62, and the downward pressing rods 616 are located outside the clamping and fixing protrusions 692. Specifically, after the unlocking of the clamping plate 67 is completed, the clamping and fixing grooves 691 on the clamping plate 67 will move to the position of the clamping and fixing protrusions 692 on the unlocking member 68, and under the action of the compression spring 66, the clamping plate 67 and the unlocking member 68 are relatively fixed as a whole. When the electronic component is inserted, the downward pressing cylinder needs to return to the initial contracted state. During this process, the clamping plate 67 and the unlocking member 68 move upward synchronously first. When the clamping plate 67 contacts the lower ends of the downward pressing rods 616 and continues to move upward, the downward pressing rods 616 will push the clamping plate 67 downward, causing the clamping and fixing protrusions 692 to separate from the clamping and fixing grooves 691, and the clamping plate 67 returns to the initial position under the action of the compression spring 66.

[0052] In addition, the method for soldering the PCB board for the LED driving power supply specifically includes the following steps:

[0053] Step 1, clamping of electronic components: Clamp the electronic components to be soldered through the downward pressing member 6;

[0054] Step 2, conveying of the circuit board: The conveyor belt on the conveyor track frame 1 drives the circuit board to move from right to left, and the left side surface of the circuit board moves to a position close to the positioning member 4;

[0055] Step 3, positioning and supporting of the circuit board: Control the positioning hydraulic cylinder 3 to perform an extension movement. The positioning member 4 blocks the circuit board and positions its position, and the supporting member 5 can support the position of the right end of the circuit board;

[0056] Step 4, soldering of the circuit board: Insert the electronic components into the corresponding positions on the circuit board through the downward pressing member 6, and solder the electronic components to the circuit board through the soldering gun 2.

[0057] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soldering method for a PCB board used in an LED driving power supply, which is mainly completed by cooperating with an automatic circuit board soldering device, and is characterized in that: The automatic circuit board soldering device includes two conveyor track frames (1). Conveyor belts for conveying the circuit board are provided on the opposite sides of the two conveyor track frames (1). The lower ends of the conveyor track frames (1) are installed on a bottom plate (11) placed on the ground. Above the right end of the bottom plate (11) and between the two conveyor track frames (1), a soldering gun (2) is provided. A positioning hydraulic cylinder (3) is installed on the top of the bottom plate (11). A connecting frame (31) is installed on the top of the positioning hydraulic cylinder (3). A positioning component (4) and a supporting component (5) are respectively installed at the left and right ends of the connecting frame (31). Both the positioning component (4) and the supporting component (5) are located between the two conveyor track frames (1). A pressing component (6) is arranged above the supporting component (5). The positioning component (4) includes a positioning support plate (41) locked to the left end of the connecting frame (31), and a blocking plate (42) installed on the top of the positioning support plate (41) for positioning the position of the circuit board. The pressing component (6) includes a locking support plate (61) installed on the external free end. A pressing support plate (62) is installed at the bottom of the locking support plate (61) through a pressing air cylinder. Pressing elastic columns (63) are respectively penetrated and connected at the front and rear ends of the pressing support plate (62). The bottoms of the two pressing elastic columns (63) are connected to the upper side of a clamping support plate (64). Clamping chutes (65) are respectively opened at the left and right ends of the clamping support plate (64). A clamping plate (67) is installed in each clamping chute (65) through a compression spring (66). The upper and lower ends of the clamping plate (67) extend outside the clamping chute (65). The two clamping plates (67) clamp the electronic component under the action of the compression spring (66). An unlocking member (68) is installed at the bottom of the pressing support plate (62). The unlocking member (68) is located between the two clamping plates (67). A fastening member (69) is provided on the side of the unlocking member (68) corresponding to the clamping plate (67). The unlocking member (68) is used to release the clamping of the clamping plate (67) on the electronic component after the electronic component is inserted into the circuit board. The fastening member (69) is used to fasten and position the position of the clamping plate (67) after the clamping is released. The soldering method for the PCB board of the LED drive power supply specifically includes the following steps: Step 1, electronic component clamping: Clamp the electronic component to be soldered through the pressing component (6). Step 2, circuit board conveying: The conveyor belt on the conveyor track frame (1) drives the circuit board to move from right to left. The left side of the circuit board moves to a position close to the positioning component (4). Step 3, circuit board positioning and support: Control the positioning hydraulic cylinder (3) to perform an elongation movement. The positioning component (4) blocks the circuit board and positions its position. The supporting component (5) can support the position of the right end of the circuit board. Step 4, circuit board soldering: Insert the electronic component into the corresponding position on the circuit board through the pressing component (6), and solder the electronic component to the circuit board through the soldering gun (2).

2. The welding method of a PCB board for an LED driving power supply according to claim 1, wherein, The baffle plate (42) has a "mountain" - shaped structure, and the height of the vertical section in the middle is higher than that of the other two vertical sections. Chamfers are provided at the upper ends of the two vertical sections on both sides of the baffle plate (42) and corresponding to the side surfaces of the connecting frames (31).

3. A soldering method for a PCB board used in an LED driving power supply according to claim 1, characterized in that, Rectifying mounting grooves (12) are formed in the opposite side surfaces in the middle of the two conveying track frames (1). A T - shaped pressing plate (13) is slidably mounted in the rectifying mounting grooves (12). The longitudinal section of the T - shaped pressing plate (13) passes through the conveying track frame (1) and extends to its outside. A rectifying plate (15) is mounted on the side surface of the T - shaped pressing plate (13) corresponding to the connecting frame (31) through a rectifying elastic column (14). The transverse section of the T - shaped pressing plate (13) is mounted on the side wall of the rectifying mounting groove (12) through a return spring (16).

4. A soldering method for a PCB board used in an LED driving power supply according to claim 3, characterized in that, Follow - up pressing frames (43) are mounted at both the front and rear ends of the bottom of the positioning support plate (41). One end of the follow - up pressing frame (43) away from the positioning support plate (41) extends below the T - shaped pressing plate (13), and the follow - up pressing frame (43) corresponds to the end of the T - shaped pressing plate (13) outside the conveying track frame (1). Chamfers for cooperation are provided at the ends of the follow - up pressing frame (43) and the T - shaped pressing plate (13) that are close to each other.

5. A soldering method for a PCB board used in an LED driving power supply according to claim 1, characterized in that, The supporting component (5) includes a supporting support plate (51) mounted at the right end of the connecting frame (31). Adjusting supports (52) capable of adjusting the front - and - rear positions are mounted at both the front and rear ends of the top of the supporting support plate (51). The welding torch (2) is mounted in the middle of the left end of the supporting support plate (51).

6. A soldering method for a PCB used in an LED driving power supply according to any one of claims 1-5, characterized in that, The locking support plate (61) includes a mounting top plate (611) mounted at the external free end. A T - shaped sliding groove (612) extending left - and - right is formed at the bottom of the mounting top plate (611). A sliding support plate (613) slidably connected to the T - shaped sliding groove (612) is provided on the lower side surface of the mounting top plate (611). The lower side surface of the sliding support plate (613) is connected to the upper end of the downward - pressing air cylinder. The left end of the sliding support plate (613) is connected to the telescopic end of a pushing air cylinder (614) mounted at the bottom of the mounting top plate (611).

7. A soldering method for a PCB board used in an LED driving power supply according to claim 6, characterized in that, Follow - up moving frames (615) are mounted at both the front and rear ends of the sliding support plate (613). The right end of the connecting frame (31) is a sliding and telescopic structure. The lower end of the follow - up moving frame (615) bypasses the conveying track frame (1) and is connected to the telescopic end of the connecting frame (31), and the vertical section of the follow - up moving frame (615) is a sliding and telescopic structure.

8. A soldering method for a PCB used in an LED driving power supply according to claim 6, characterized in that, The unlocking member (68) has an equilateral trapezoid structure that is wider at the top and narrower at the bottom; the fastening member (69) includes a fastening groove (691) mounted on the opposite side surfaces at the upper end of the clamping plate (67), and fastening protrusions (692) provided on the left and right sides at the upper end of the unlocking member (68). The fastening protrusions (692) cooperate with the fastening groove (691) to position the clamping plate (67) when it moves to the upper end of the unlocking member (68).

9. A soldering method for a PCB used in an LED driving power supply according to claim 8, characterized in that, The cross - sections of the fastening protrusions (692) and the fastening groove (691) are both triangular structures, and the elastic force of the compression spring (66) is greater than the elastic force of the downward - pressing elastic column (63).

10. A soldering method for a PCB board used in an LED driving power supply according to claim 8, characterized in that, The bottom of the sliding support plate (613) is symmetrically installed with downward pressure rods (616). The lower ends of the downward pressure rods (616) pass through the downward pressure support plate (62), and the downward pressure rods (616) are located outside the clamping protrusions (692). The front side of the clamping plate (67) is of a flared structure.

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