A device and method for efficiently soldering large size capacitors on printed circuit boards

Abstract

The application discloses a kind of high efficiency in printed circuit board welding large size capacitor device and method, the present application relates to the technical field of welding two large size capacitors on printed circuit board, the left end surface of vertical plate is provided with two for positioning and welding of large size capacitor positioning and welding assembly, positioning and push assembly for positioning printed circuit board are further provided on workbench, push printed circuit board towards large size capacitor direction;Positioning and push assembly include the base fixed on workbench, the push cylinder fixed on the left end surface of base, the piston rod of push cylinder is right through base, and the extension end is fixed with backplate, the bottom of backplate is fixed with longitudinally arranged support strip, and the top surface of support strip is provided with clamping groove along its length direction.The beneficial effects of the present application are: shorten printed circuit board and two large size capacitor welding efficiency, greatly improve printed circuit board and two large size capacitor welding efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of welding two large-sized capacitors on a printed circuit board, and in particular to a device and method for efficiently welding large-sized capacitors on a printed circuit board. Background Art

[0002] The structure of the printed circuit board 1 produced by a certain workshop is as follows Figure 1~Figure 2 As shown, there are two pads 2 formed on the printed circuit board 1. Both pads 2 are circular and both pads 2 are copper-plated. The process requires welding a solder paste on each of the two pads 2 of the printed circuit board 1. Figure 3~Figure 4 The large-sized capacitor shown includes a rectangular capacitor body 3 with an L-shaped pin 4 connected to the end face. The capacitor body 3 is 7-8 cm tall. The printed circuit board 1 with two large-sized capacitors soldered to it is primarily supplied to customers, who then form a circuit layer on the printed circuit board 1 to provide electrical connection between the two large-sized capacitors.

[0003] In the workshop, the method for workers to solder two large-sized capacitors on the printed circuit board 1 is as follows:

[0004] S1, the worker takes out a Figure 1~Figure 2 Place the printed circuit board 1 shown in the figure flat on the table of the machine, and ensure that the two pads 2 on the printed circuit board 1 face upwards;

[0005] S2, the worker takes out a Figure 3~Figure 4 The large-size capacitor shown in the figure supports the horizontal parts of the two L-shaped pins 4 of the large-size capacitor on the top surface of a pad 2, and then the worker adjusts the position of the large-size capacitor so that the capacitor body 3 of the large-size capacitor is aligned with the pad 2 to complete the positioning of the large-size capacitor and the pad 2, as shown in FIG. Figure 5 As shown;

[0006] Then the worker operates the spot welding machine so that the spot welding head 5 of the spot welding machine touches the horizontal part of the left L-shaped pin 4 of the large-sized capacitor. Figure 6 As shown, the left L-shaped pin 4 is soldered to the pad 2;

[0007] The worker continues to operate the spot welding machine so that the spot welding head 5 of the spot welding machine touches the horizontal part of the right L-shaped pin 4 of the large-sized capacitor. Figure 7 As shown, the right L-shaped pin 4 is welded to the pad 2, thereby finally welding the first large-size capacitor to a pad 2;

[0008] S3, the worker repeats the operation of step S2 once, thereby soldering the second large-sized capacitor to another pad 2, as shown in FIG. Figure 8As shown, two large-sized capacitors are finally welded on a printed circuit board 1;

[0009] S4. The worker repeats steps S1 to S3 multiple times to continuously solder two large-size capacitors on multiple printed circuit boards 1. After soldering, the circuit board manufacturer supplies the soldered printed circuit boards 1 to customers.

[0010] However, although the method used in the workshop can solder two large-sized capacitors on multiple printed circuit boards 1, it still has the following technical defects in actual operation:

[0011] I. In step S2, after the worker supports both L-shaped pins 4 of the large-size capacitor on the top surface of the pad 2, the worker needs to frequently adjust the position of the large-size capacitor to complete the positioning of the large-size capacitor and the pad 2. This undoubtedly prolongs the welding time of the large-size capacitor and the pad 2, thereby reducing the welding efficiency between the printed circuit board 1 and the large-size capacitor.

[0012] II. In steps S2 to S3, the worker needs to operate the spot welding machine a total of four times to successively weld the two large-size capacitors to the two pads 2 of the printed circuit board 1. This takes a long time to weld both large-size capacitors to the printed circuit board 1, thereby extending the time for welding the large-size capacitors on the subsequent printed circuit board 1. As a result, the production workshop is unable to supply customers within the specified time, thereby further reducing the welding efficiency of the printed circuit board 1 and the large-size capacitors.

[0013] Therefore, there is an urgent need for a device and method that can shorten the welding efficiency between a printed circuit board and two large-sized capacitors and greatly improve the welding efficiency between the printed circuit board and two large-sized capacitors. Summary of the Invention

[0014] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a device and method for efficiently soldering large-sized capacitors on a printed circuit board, which shortens the soldering efficiency between the printed circuit board and two large-sized capacitors and greatly improves the soldering efficiency between the printed circuit board and the two large-sized capacitors.

[0015] The objectives of the present invention are achieved through the following technical solutions: a device for efficiently soldering large-sized capacitors on a printed circuit board, comprising a vertical plate fixed to a workbench, two positioning and soldering assemblies for positioning and soldering the large-sized capacitors being provided on the left end surface of the vertical plate, and a positioning and pushing assembly for positioning the printed circuit board and pushing the printed circuit board toward the large-sized capacitor being further provided on the workbench;

[0016] The positioning and pushing assembly includes a base fixed on the workbench, a pushing cylinder fixed on the left end surface of the base, a piston rod of the pushing cylinder passes through the base to the right, and a back plate is fixed on the extended end, a longitudinal support strip is fixed on the bottom of the back plate, and a slot is opened on the top surface of the support strip along its length direction;

[0017] The positioning and welding assembly located on the upper side of the vertical plate includes a connecting rod fixed on the vertical plate, a frame fixed on the left end of the connecting rod, and a hollow positioning cylinder fixed on the left end face of the frame. A slide that matches its inner cavity is slidably installed in the hollow positioning cylinder. A spring is fixed between the right end face of the slide and the bottom wall of the hollow positioning cylinder. The inner cavity of the hollow positioning cylinder matches the outer contour of the capacitor body of the large-size capacitor. A vertically arranged double-acting cylinder is also fixed in the frame. Brackets are fixed on the acting ends of the two piston rods of the double-acting cylinder. Both brackets extend to the left, and horizontally arranged spot welding heads are fixed in the extended ends. The right end of the spot welding head is connected to the spot welding machine via a power cord.

[0018] The left end face of the card slot is flush with the right end face of the back plate, the horizontal width of the card slot is equal to the width of the printed circuit board, and the longitudinal width of the card slot is equal to the longitudinal width of the printed circuit board.

[0019] A rotating cylinder is fixedly provided on the left end surface of the upper end portion of the back plate, the rotating axis of the rotating cylinder penetrates the back plate to the right, and a rotating plate is fixedly provided on the extending end.

[0020] The two brackets are symmetrical about the hollow positioning cylinder, and the two spot welding heads are symmetrical about the hollow positioning cylinder.

[0021] The structure of the positioning and welding assembly located on the lower side of the vertical plate is the same as the structure of the positioning and welding assembly located on the upper side of the vertical plate.

[0022] The connecting rod and the hollow positioning cylinder are on the same straight line.

[0023] The device also includes a controller, which is electrically connected to the pushing cylinder, the rotating cylinder, and the double-acting cylinder via a signal line.

[0024] A method for efficiently soldering large-size capacitors on a printed circuit board comprises the following steps:

[0025] S1. Position the printed circuit board. The specific steps are as follows:

[0026] S11. The worker takes out a printed circuit board and places the printed circuit board against the right end surface of the back plate of the positioning and pushing assembly. The worker then inserts the lower end of the printed circuit board into the slot of the support bar of the positioning and pushing assembly from top to bottom.

[0027] S12, control the rotating cylinder of the positioning and pushing assembly to start, the rotating cylinder drives the rotating plate to rotate, when the rotating plate rotates 180°, the controller controls the rotating cylinder to close, at this time, the rotating plate just blocks the right side of the upper end of the printed circuit board and contacts the right end surface of the printed circuit board;

[0028] S2, positioning of two large-size capacitors, the specific operation steps are:

[0029] S21, the worker embeds the capacitor body of one large-size capacitor into the hollow positioning cylinder of the upper positioning and welding assembly from left to right, ensures that the right end surface of the capacitor body contacts the left end surface of the sliding plate, since the inner cavity of the hollow positioning cylinder matches the outer contour of the capacitor body of the large-size capacitor, thereby positioning the first large-size capacitor in the hollow positioning cylinder of the upper positioning and welding assembly, at this time, the vertical parts of the two L-shaped pins of the large-size capacitor are opposite to the left and right of the upper pads of the printed circuit board;

[0030] S22, repeat the operation of step S21 once, thereby positioning the second large-size capacitor in the hollow positioning cylinder of the lower positioning and welding assembly, at this time, the vertical parts of the two L-shaped pins of the large-size capacitor are opposite to the left and right of the lower pads of the printed circuit board;

[0031] S3, control the two piston rods of the double-acting cylinder of the upper positioning and welding assembly to retract, the two piston rods drive the brackets connected thereto to move oppositely, the two brackets drive the spot welding heads connected thereto to move oppositely, when the two piston rods of the double-acting cylinder completely retract, the two spot welding heads are respectively at the right side of the vertical parts of the two L-shaped pins of the upper large-size capacitor;

[0032] control the two piston rods of the double-acting cylinder of the lower positioning and welding assembly to retract, when the two piston rods of the double-acting cylinder completely retract, the two spot welding heads are respectively at the right side of the vertical parts of the two L-shaped pins of the lower large-size capacitor;

[0033] S4, control the piston rod of the pushing cylinder of the positioning and pushing assembly to extend to the right, the piston rod drives the back plate to move to the right, the back plate drives the support strip, the rotating cylinder and the printed circuit board to move synchronously to the right, the upper pads of the printed circuit board move towards the vertical parts of the two L-shaped pins of the upper large-size capacitor, at the same time, the lower pads of the printed circuit board move towards the vertical parts of the two L-shaped pins of the lower large-size capacitor;

[0034] when the printed circuit board continues to move to the right for a distance, the upper pads contact the vertical parts of the two L-shaped pins of the upper large-size capacitor, at the same time, the lower pads contact the vertical parts of the two L-shaped pins of the lower large-size capacitor;

[0035] As the printed circuit board continues to move to the right, the printed circuit board pushes the L-shaped pins of the two large-sized capacitors to move to the right. The L-shaped pins then push the capacitor bodies of the large-sized capacitors to move to the right. The capacitor bodies then push the slide to the right, and the slide compresses the spring to the right.

[0036] As the printed circuit board continues to move to the right, when the vertical parts of the two L-shaped pins of the upper large-size capacitor touch the two spot welding heads respectively, the vertical parts of the two L-shaped pins are spot welded to the upper pads, thereby achieving the welding of the upper large-size capacitor to the upper pads. At the same time, when the vertical parts of the two L-shaped pins of the lower large-size capacitor touch the two spot welding heads respectively, the vertical parts of the two L-shaped pins are spot welded to the lower pads, thereby achieving the welding of the lower large-size capacitor to the lower pads, and finally achieving the welding of two large-size capacitors on the printed circuit board.

[0037] S5. Remove the printed circuit board with two large capacitors soldered on it. The specific steps are as follows:

[0038] S51. The piston rod of the push cylinder of the control positioning and pushing assembly retracts to the left. The piston rod drives the back plate to move to the left. The back plate drives the support bar, printed circuit board, and rotating cylinder to move to the left synchronously. The printed circuit board drives the two large-sized capacitors to move to the left synchronously. When the piston rod of the push cylinder is fully retracted, the worker controls the rotating cylinder to start. The rotating cylinder drives the rotating plate to rotate, and the rotating plate separates from the printed circuit board. When the rotating plate rotates 180°, the controller controls the rotating cylinder to close.

[0039] S52. The worker lifts the printed circuit board upward to keep it away from the support bar, and then removes the printed circuit board on which two large capacitors are soldered;

[0040] S6. The worker repeats steps S1 to S5 multiple times to continuously solder two large-size capacitors on multiple printed circuit boards. After soldering, the circuit board manufacturer supplies the soldered printed circuit boards to customers.

[0041] The present invention has the following advantages: shortening the welding efficiency between the printed circuit board 1 and the two large-sized capacitors, and greatly improving the welding efficiency between the printed circuit board and the two large-sized capacitors. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the structure of a printed circuit board produced by a certain workshop;

[0043] Figure 2 for Figure 1 A top view of

[0044] Figure 3 It is a structural diagram of a large-size capacitor;

[0045] Figure 4 for Figure 3 The main view;

[0046] Figure 5 A schematic diagram showing the positioning of large capacitors and pads.

[0047] Figure 6 A schematic diagram showing the spot welding head of the spot welding machine touching the horizontal portion of the left L-shaped pin of the large-sized capacitor;

[0048] Figure 7 A schematic diagram showing the spot welding head of a spot welding machine contacting the horizontal portion of the right L-shaped pin of a large capacitor;

[0049] Figure 8 This is a diagram for soldering a second large capacitor to another pad.

[0050] Figure 9 It is a structural schematic diagram of the present invention;

[0051] Figure 10 for Figure 9 The main cross-sectional diagram of

[0052] Figure 11 Axonometric drawing for positioning and pushing components;

[0053] Figure 12 for Figure 10 The main cross-sectional diagram of

[0054] Figure 13 An axonometric view of the vertical plate connected to two positioning and welding components;

[0055] Figure 14 for Figure 13 A-direction schematic diagram;

[0056] Figure 15 for Figure 13 The main cross-sectional diagram of

[0057] Figure 16 A schematic diagram of inserting the lower end of the printed circuit board into the slot of the support bar from top to bottom;

[0058] Figure 17 is a schematic diagram showing the contact between the rotating plate and the right end surface of the printed circuit board;

[0059] Figure 18 A schematic diagram of positioning a large capacitor within a hollow positioning cylinder of a positioning and welding assembly;

[0060] Figure 19 A schematic diagram showing two spot welding heads positioned on the right side of the vertical portion of two L-shaped pins of a large-sized capacitor;

[0061] Figure 20 A schematic diagram of the contact between the pad and the vertical portions of two L-shaped pins of a large capacitor;

[0062] Figure 21 for Figure 20 A partial enlarged view of part B;

[0063] Figure 22 This is a schematic diagram of the vertical parts of the two L-shaped pins of a large capacitor touching the two spot weld heads respectively;

[0064] Figure 23 for Figure 22 A partial enlarged view of part C;

[0065] Figure 24 This is a schematic diagram of the printed circuit board driving two large-sized capacitors to move synchronously to the left;

[0066] Figure 25 It is a schematic diagram of the separation of the rotating plate and the printed circuit board;

[0067] In the picture:

[0068] 1-Printed circuit board, 2-Solder pad, 3-Capacitor body, 4-L-shaped pin, 5-Spot welding head;

[0069] 6- workbench, 7- vertical plate, 8- positioning and welding assembly, 9- positioning and pushing assembly, 10- base, 11- pushing cylinder, 12- back plate, 13- support bar, 14- slot;

[0070] 15-connecting rod, 16-frame, 17-hollow positioning cylinder, 18-slide plate, 19-spring, 20-double-acting cylinder, 21-bracket, 22-rotating cylinder, 23-rotating plate. DETAILED DESCRIPTION

[0071] The present invention will be further described below with reference to the accompanying drawings, and the protection scope of the present invention is not limited to the following:

[0072] like Figures 9 to 15 As shown, a device for efficiently soldering large-sized capacitors on printed circuit boards includes a vertical plate 7 fixedly mounted on a workbench 6. Two positioning and soldering assemblies 8 for positioning and soldering the large-sized capacitors are disposed on the left end surface of the vertical plate 7. Furthermore, a positioning and pushing assembly 9 for positioning a printed circuit board 1 and pushing the printed circuit board 1 toward the large-sized capacitor is disposed on the workbench 6.

[0073] The positioning and pushing assembly 9 includes a base 10 fixed to the workbench 6, and a pushing cylinder 11 fixed to the left end surface of the base 10. The piston rod of the pushing cylinder 11 extends rightward through the base 10, and a back plate 12 is fixed to the extended end. A longitudinal support bar 13 is fixed to the bottom of the back plate 12, and a slot 14 is provided on the top surface of the support bar 13 along its length. The left end surface of the slot 14 is flush with the right end surface of the back plate 12, and the horizontal width of the slot 14 is equal to the width of the printed circuit board 1. The longitudinal width of the slot 14 is equal to the longitudinal width of the printed circuit board 1. A rotating cylinder 22 is fixed to the left end surface of the upper end of the back plate 12. The rotating axis of the rotating cylinder 22 extends rightward through the back plate 12, and a rotating plate 23 is fixed to the extended end.

[0074] The structure of the positioning and welding assembly 8 located on the lower side of the vertical plate 7 is the same as that of the positioning and welding assembly 8 located on the upper side of the vertical plate 7. The positioning and welding assembly 8 located on the upper side of the vertical plate 7 includes a connecting rod 15 fixed on the vertical plate 7, a frame 16 fixed to the left end of the connecting rod 15, and a hollow positioning cylinder 17 fixed to the left end face of the frame 16. The connecting rod 15 and the hollow positioning cylinder 17 are on the same straight line. A slide 18 that matches its inner cavity is slidably installed in the hollow positioning cylinder 17. There is a gap between the right end face of the slide 18 and the bottom wall of the hollow positioning cylinder 17. A spring 19 is fixedly provided, and the inner cavity of the hollow positioning cylinder 17 matches the outer contour of the capacitor body 3 of the large-size capacitor. A vertically arranged double-acting cylinder 20 is also fixedly provided in the frame 16. The two piston rods of the double-acting cylinder 20 are fixedly provided with brackets 21 on the active ends. The two brackets 21 are symmetrical about the hollow positioning cylinder 17, and the two brackets 21 extend to the left. A horizontally arranged spot welding head 5 is fixedly provided in the extended end. The two spot welding heads 5 are symmetrical about the hollow positioning cylinder 17, and the right end of the spot welding head 5 is connected to the spot welding machine via a power cord.

[0075] The device also includes a controller, which is electrically connected to the pushing cylinder 11, the rotating cylinder 22, and the double-acting cylinder 20 via a signal line. Workers can use the controller to control the piston rods of the pushing cylinder 11 and the double-acting cylinder 20 to extend or retract. At the same time, they can also control the rotating axis of the rotating cylinder 22 to rotate, thereby facilitating the workers' operation.

[0076] A method for efficiently soldering large-size capacitors on a printed circuit board comprises the following steps:

[0077] S1. Positioning the printed circuit board 1. The specific steps are as follows:

[0078] S11, the worker takes out a Figure 1~Figure 2The printed circuit board 1 shown is placed against the right end surface of the back plate 12 of the positioning and pushing component 9, and then the worker inserts the lower end of the printed circuit board 1 from top to bottom into the slot 14 of the support bar 13 of the positioning and pushing component 9, as shown in FIG. Figure 16 As shown;

[0079] S12, the rotary cylinder 22 of the control positioning and pushing component 9 is started, and the rotary cylinder 22 drives the rotary plate 23 to rotate. When the rotary plate 23 rotates 180 degrees, the controller controls the rotary cylinder 22 to close. At this time, the rotary plate 23 just blocks the right side of the upper end of the printed circuit board 1 and contacts the right end surface of the printed circuit board 1. Figure 17 As shown;

[0080] S2. Positioning of two large capacitors. The specific steps are as follows:

[0081] S21. The worker will Figure 3~Figure 4 The capacitor body 3 of the large-sized capacitor shown is embedded from left to right into the hollow positioning cylinder 17 of the upper positioning and welding assembly 8, ensuring that the right end surface of the capacitor body 3 is in contact with the left end surface of the slide 18. Since the inner cavity of the hollow positioning cylinder 17 matches the outer contour of the capacitor body 3 of the large-sized capacitor, the first large-sized capacitor is positioned in the hollow positioning cylinder 17 of the upper positioning and welding assembly 8, as shown in FIG. Figure 18 As shown, at this time, the vertical portions of the two L-shaped pins 4 of the large-size capacitor are both opposite to the upper pads 2 of the printed circuit board 1;

[0082] S22. Repeat step S21 once to position the second large-sized capacitor in the hollow positioning cylinder 17 of the lower positioning and welding assembly 8. At this time, the vertical portions of the two L-shaped pins 4 of the large-sized capacitor are both opposite to the lower pads 2 of the printed circuit board 1.

[0083] S3, control the two piston rods of the double-acting cylinder 20 of the upper positioning and welding assembly 8 to retract, and the two piston rods drive the bracket 21 connected thereto to make relative motion, and the two brackets 21 drive the spot welding heads 5 connected thereto to make relative motion. When the two piston rods of the double-acting cylinder 20 are fully retracted, the two spot welding heads 5 are respectively on the right side of the vertical portion of the two L-shaped pins 4 of the upper large-size capacitor, as shown in FIG. Figure 19 As shown;

[0084] The two piston rods of the double-acting cylinder 20 controlling the positioning and welding assembly 8 on the lower side are retracted. When the two piston rods of the double-acting cylinder 20 are fully retracted, the two spot welding heads 5 are respectively located to the right of the vertical parts of the two L-shaped pins 4 of the large-sized capacitor on the lower side;

[0085] S4. The piston rod of the push cylinder 11 of the control positioning and pushing assembly 9 extends to the right, and the piston rod drives the back plate 12 to move to the right. The back plate 12 drives the support bar 13, the rotary cylinder 22 and the printed circuit board 1 to move to the right synchronously. The upper side pad 2 of the printed circuit board 1 moves toward the vertical part of the two L-shaped pins 4 of the upper large-size capacitor. At the same time, the lower side pad 2 of the printed circuit board 1 moves toward the vertical part of the two L-shaped pins 4 of the lower large-size capacitor.

[0086] When the printed circuit board 1 continues to move to the right for a distance, the upper pad 2 contacts the vertical parts of the two L-shaped pins 4 of the upper large-size capacitor. Figure 20-21 As shown, at the same time, the lower pad 2 contacts the vertical portions of the two L-shaped pins 4 of the lower large-size capacitor;

[0087] As the printed circuit board 1 continues to move rightward, the printed circuit board 1 pushes the L-shaped pins 4 of the two large-sized capacitors to move rightward, the L-shaped pins 4 then push the capacitor body 3 of the large-sized capacitor to move rightward, the capacitor body 3 then pushes the slide 18 to move rightward, and the slide 18 compresses the spring 19 to the right;

[0088] As the printed circuit board 1 continues to move to the right, when the vertical parts of the two L-shaped pins 4 of the upper large-size capacitor touch the two spot welding heads 5 respectively, Figure 22-23 As shown, the vertical parts of the two L-shaped pins 4 are spot welded to the upper pad 2, thereby realizing the welding of the upper large-size capacitor to the upper pad 2. At the same time, when the vertical parts of the two L-shaped pins 4 of the lower large-size capacitor touch the two spot welding heads 5 respectively, the vertical parts of the two L-shaped pins 4 are spot welded to the lower pad 2, thereby realizing the welding of the lower large-size capacitor to the lower pad 2, and finally realizing the welding of two large-size capacitors on the printed circuit board 1. The structure after welding is as shown in FIG. Figure 8 As shown;

[0089] Among them, in step S1, the lower end of the printed circuit board 1 is embedded in the card slot 14 of the positioning and pushing component 9 to complete the positioning of the printed circuit board 1; in step S2, the capacitor body 3 of the large-size capacitor is embedded in the hollow positioning cylinder 17 of the positioning and welding component 8 to complete the positioning of the large-size capacitor, so that the capacitor body 3 of the large-size capacitor and the pad 2 on the printed circuit board 1 are opposite to each other on the left and right; in step S4, the piston rod of the pushing cylinder 11 of the positioning and pushing component 9 is controlled to extend to the right, so as to finally position the large-size capacitor on the pad 2. At this time, the capacitor body 3 of the large-size capacitor is directly opposite to the pad 2.

[0090] It can be seen that this device is better than Figures 5 to 7The welding method shown needs workers to frequently adjust the position of the large-size capacitor to complete the positioning of the large-size capacitor and the pad 2. Only by sequentially completing the positioning printed circuit board 1 process, the positioning large-size capacitor process, and the control pushing cylinder 11 piston rod extending to the right process, the large-size capacitor can be quickly positioned on the pad 2, thereby greatly shortening the positioning time of the large-size capacitor and the pad 2, and further shortening the welding time of the large-size capacitor and the pad 2, thereby greatly improving the welding efficiency of the printed circuit board 1 and the large-size capacitor.

[0091] S5, taking away the printed circuit board 1 welded with two large-size capacitors, the specific operation steps are as follows:

[0092] S51, control the piston rod of the pushing cylinder 11 of the positioning and pushing assembly 9 to retract to the left, the piston rod drives the back plate 12 to move to the left, the back plate 12 drives the support strip 13, the printed circuit board 1 and the rotating cylinder 22 to synchronously move to the left, and the printed circuit board 1 drives the two large-size capacitors to synchronously move to the left, as shown in Figure 24 When the piston rod of the pushing cylinder 11 is completely retracted, the worker controls the rotating cylinder 22 to start, the rotating cylinder 22 drives the rotating plate 23 to rotate, and the rotating plate 23 is separated from the printed circuit board 1, as shown in Figure 25 When the rotating plate 23 rotates 180°, the controller controls the rotating cylinder 22 to close;

[0093] S52, the worker lifts the printed circuit board 1 upward to make it away from the support strip 13, and then the worker takes away the printed circuit board 1 welded with two large-size capacitors, the taking away direction is as shown by the arrow in Figure 25

[0094] S6, the worker repeats the operation of steps S1-S5 multiple times, that is, two large-size capacitors are welded on multiple printed circuit boards 1 in succession, and after welding, the printed circuit board 1 welded is supplied to the customer by the circuit board manufacturer.

[0095] As can be known from step S4, only the extension action of the piston rod of the pushing cylinder 11 is controlled to make the printed circuit board 1 move to the right, the pad 2 of the printed circuit board 1 is first in contact with the vertical part of the two L-shaped pins 4 of the large-size capacitor, and then the two L-shaped pins 4 of the large-size capacitor are pushed to move to the right, when the vertical parts of the two L-shaped pins 4 of the large-size capacitor respectively touch the two spot welding heads 5, the vertical parts of the two L-shaped pins 4 are spot welded on the pad 2, thereby realizing the welding of the two large-size capacitors on the two pads 2 of the printed circuit board 1 respectively.

[0096] Therefore, it can be known that the device only needs to control the extension action of the piston rod of the pushing cylinder 11, that is, the two large-size capacitors can be welded on the two pads 2 of the printed circuit board 1 respectively in the same time period, compared with the prior art​ Figures 5 to 7 The welding method shown does not require a worker to operate a spot welding machine four times to successively weld two large-size capacitors to the two pads 2 of the printed circuit board 1, thereby achieving the goal of welding both large-size capacitors to the printed circuit board 1 in a short period of time, thereby further improving the welding efficiency of the printed circuit board 1 and the large-size capacitors, and ensuring that the production workshop can supply customers within the specified time.

Claims

1. A device for efficiently soldering large-size capacitors on a printed circuit board, characterized by: It comprises a vertical plate (7) fixed on a workbench (6); two positioning and welding components (8) for positioning and welding large-sized capacitors are provided on the left end surface of the vertical plate (7); and a positioning and pushing component (9) for positioning a printed circuit board (1) and pushing the printed circuit board (1) toward the large-sized capacitor is also provided on the workbench (6); The positioning and pushing assembly (9) comprises a base (10) fixed on the workbench (6), a pushing cylinder (11) fixed on the left end surface of the base (10), a piston rod of the pushing cylinder (11) passing through the base (10) to the right, and a back plate (12) fixed on the extended end, a longitudinally arranged support bar (13) fixed on the bottom of the back plate (12), and a slot (14) is provided on the top surface of the support bar (13) along its length direction; The positioning and welding assembly (8) located on the upper side of the vertical plate (7) includes a connecting rod (15) fixed on the vertical plate (7), a frame (16) fixed on the left end of the connecting rod (15), and a hollow positioning cylinder (17) fixed on the left end face of the frame (16). A slide plate (18) matching the inner cavity of the hollow positioning cylinder (17) is slidably installed in the hollow positioning cylinder (17). A spring (19) is fixed between the right end face of the slide plate (18) and the bottom wall of the hollow positioning cylinder (17). The inner cavity of the hollow positioning cylinder (17) matches the outer contour of the capacitor body (3) of the large-size capacitor. A vertically arranged double-acting cylinder (20) is also fixed in the frame (16). The two piston rods of the double-acting cylinder (20) are both fixed with brackets (21). The two brackets (21) extend to the left, and a horizontally arranged spot welding head (5) is fixed in the extended end. The right end of the spot welding head (5) is connected to the spot welding machine via a power line. The left end face of the card slot (14) is flush with the right end face of the back plate (12), the horizontal width of the card slot (14) is equal to the width of the printed circuit board (1), and the longitudinal width of the card slot (14) is equal to the longitudinal width of the printed circuit board (1); a rotating cylinder (22) is fixedly provided on the left end face of the upper end portion of the back plate (12), the rotating axis of the rotating cylinder (22) passes through the back plate (12) to the right, and a rotating plate (23) is fixedly provided on the extended end.

2. The device for efficiently soldering large-size capacitors on a printed circuit board according to claim 1, characterized in that: The two brackets (21) are symmetrical about the hollow positioning cylinder (17), and the two spot welding heads (5) are symmetrical about the hollow positioning cylinder (17).

3. The device for efficiently soldering large-sized capacitors on a printed circuit board according to claim 2, characterized in that: The structure of the positioning and welding assembly (8) located on the lower side of the vertical plate (7) is the same as the structure of the positioning and welding assembly (8) located on the upper side of the vertical plate (7).

4. The device for efficiently soldering large-sized capacitors on a printed circuit board according to claim 3, wherein: The connecting rod (15) and the hollow positioning cylinder (17) are located on the same straight line.

5. The device for efficiently soldering large-sized capacitors on a printed circuit board according to claim 4, characterized in that: The device also includes a controller, which is electrically connected to the pushing cylinder (11), the rotating cylinder (22), and the double-acting cylinder (20) via signal lines.

6. A method for efficiently soldering large-sized capacitors on a printed circuit board, using the device for efficiently soldering large-sized capacitors on a printed circuit board according to claim 5, characterized in that: It includes the following steps: S1. Positioning the printed circuit board (1). The specific steps are as follows: S11, the worker takes out a printed circuit board (1), places the printed circuit board (1) against the right end surface of the back plate (12) of the positioning and pushing component (9), and then the worker inserts the lower end of the printed circuit board (1) from top to bottom into the slot (14) of the support bar (13) of the positioning and pushing component (9); S12, the rotary cylinder (22) of the control positioning and pushing component (9) is started, and the rotary cylinder (22) drives the rotary plate (23) to rotate. When the rotary plate (23) rotates 180 degrees, the controller controls the rotary cylinder (22) to close. At this time, the rotary plate (23) just blocks the right side of the upper end of the printed circuit board (1) and contacts the right end surface of the printed circuit board (1); S2. Positioning of two large capacitors. The specific steps are as follows: S21. The worker inserts the capacitor body (3) of a large-sized capacitor into the hollow positioning cylinder (17) of the upper positioning and welding assembly (8) from left to right, ensuring that the right end face of the capacitor body (3) contacts the left end face of the slide (18). Since the inner cavity of the hollow positioning cylinder (17) matches the outer contour of the capacitor body (3) of the large-sized capacitor, the first large-sized capacitor is positioned in the hollow positioning cylinder (17) of the upper positioning and welding assembly (8). At this time, the vertical parts of the two L-shaped pins (4) of the large-sized capacitor are both opposite to the upper pads (2) of the printed circuit board (1); S22, repeating the operation of step S21 once, thereby positioning the second large-sized capacitor in the hollow positioning cylinder (17) of the lower positioning and welding assembly (8), at which time, the vertical portions of the two L-shaped pins (4) of the large-sized capacitor are both opposite to the lower side pads (2) of the printed circuit board (1); S3, the two piston rods of the double-acting cylinder (20) of the upper positioning and welding assembly (8) are controlled to retract, and the two piston rods drive the bracket (21) connected thereto to make relative motions, and the two brackets (21) drive the spot welding heads (5) connected thereto to make relative motions, and when the two piston rods of the double-acting cylinder (20) are completely retracted, the two spot welding heads (5) are respectively located on the right side of the vertical portion of the two L-shaped pins (4) of the upper large-size capacitor; The two piston rods of the double-acting cylinder (20) of the positioning and welding assembly (8) on the lower side are retracted. When the two piston rods of the double-acting cylinder (20) are fully retracted, the two spot welding heads (5) are respectively located on the right side of the vertical portion of the two L-shaped pins (4) of the large-sized capacitor on the lower side; S4, the piston rod of the push cylinder (11) of the control positioning and pushing component (9) extends to the right, the piston rod drives the back plate (12) to move to the right, the back plate (12) drives the support bar (13), the rotary cylinder (22) and the printed circuit board (1) to move to the right synchronously, the upper side pad (2) of the printed circuit board (1) moves toward the vertical direction of the two L-shaped pins (4) of the upper large-size capacitor, and at the same time, the lower side pad (2) of the printed circuit board (1) moves toward the vertical direction of the two L-shaped pins (4) of the lower large-size capacitor; When the printed circuit board (1) continues to move rightward for a distance, the upper soldering pad (2) contacts the vertical portions of the two L-shaped pins (4) of the upper large-sized capacitor, and at the same time, the lower soldering pad (2) contacts the vertical portions of the two L-shaped pins (4) of the lower large-sized capacitor; As the printed circuit board (1) continues to move to the right, the printed circuit board (1) pushes the L-shaped pins (4) of the two large-sized capacitors to move to the right, the L-shaped pins (4) then push the capacitor body (3) of the large-sized capacitor to move to the right, the capacitor body (3) then pushes the slide plate (18) to move to the right, and the slide plate (18) compresses the spring (19) to the right; As the printed circuit board (1) continues to move to the right, when the vertical portions of the two L-shaped pins (4) of the upper large-size capacitor respectively touch the two spot welding heads (5), the vertical portions of the two L-shaped pins (4) are spot welded to the upper pad (2), thereby realizing the welding of the upper large-size capacitor to the upper pad (2). At the same time, when the vertical portions of the two L-shaped pins (4) of the lower large-size capacitor respectively touch the two spot welding heads (5), the vertical portions of the two L-shaped pins (4) are spot welded to the lower pad (2), thereby realizing the welding of the lower large-size capacitor to the lower pad (2), and finally realizing the welding of two large-size capacitors on the printed circuit board (1); S5. Remove the printed circuit board (1) with two large capacitors soldered on it. The specific steps are as follows: S51, the piston rod of the push cylinder (11) of the control positioning and pushing component (9) is retracted to the left, the piston rod drives the back plate (12) to move to the left, the back plate (12) drives the support bar (13), the printed circuit board (1) and the rotating cylinder (22) to move to the left synchronously, the printed circuit board (1) drives the two large-size capacitors to move to the left synchronously, when the piston rod of the push cylinder (11) is completely retracted, the worker controls the rotating cylinder (22) to start, the rotating cylinder (22) drives the rotating plate (23) to rotate, the rotating plate (23) is separated from the printed circuit board (1), and when the rotating plate (23) rotates 180 degrees, the controller controls the rotating cylinder (22) to close; S52, the worker lifts the printed circuit board (1) upward to keep it away from the support bar (13), and then the worker takes away the printed circuit board (1) on which two large-sized capacitors are welded; S6. The worker repeats the operations of steps S1 to S5 multiple times, and can continuously weld two large-size capacitors on multiple printed circuit boards (1). After welding, the circuit board manufacturer supplies the welded printed circuit boards (1) to customers.

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