CN113878272A - Spot welding device for printed circuit board and welding method thereof - Google Patents
Spot welding device for printed circuit board and welding method thereof Download PDFInfo
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- CN113878272A CN113878272A CN202111308503.1A CN202111308503A CN113878272A CN 113878272 A CN113878272 A CN 113878272A CN 202111308503 A CN202111308503 A CN 202111308503A CN 113878272 A CN113878272 A CN 113878272A
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- compression roller
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- 238000003466 welding Methods 0.000 title claims abstract description 182
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000006835 compression Effects 0.000 claims description 38
- 238000007906 compression Methods 0.000 claims description 38
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000005476 soldering Methods 0.000 description 18
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/42—Printed circuits
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The invention discloses a spot welding device for a printed circuit board and a welding method thereof, wherein the spot welding device for the printed circuit board comprises a welding plate, the top of the welding plate is preset with a notch, the welding plate is positioned in the notch and is provided with a plurality of sleeves arranged according to the distribution of circuit board pins, the welding plate is provided with through holes at the sleeves, the through holes are coincided with the center lines of the sleeves, welding rods are arranged in the sleeves, the tops of the sleeves are provided with slices for cutting off the welding rods to be left in the sleeves, the welding plate is provided with a patch board in an aligned mode in the vertical direction, and the patch board is provided with a patch hole for the welding rods to pass through; through this device, utilize the combination of pin and the inside welding rod of sleeve to fix the circuit component on the circuit board, also fixed the circuit board simultaneously, owing to not contact with circuit component, but rather with the pin contact on it, consequently be favorable to fixing circuit component on the circuit board fast, the simple operation.
Description
Technical Field
The invention relates to the technical field of circuit board welding, in particular to a spot welding device for a printed circuit board and a welding method thereof.
Background
At present, with the continuous development of electronic circuits, the soldering technique of circuit boards is one of indispensable apparatuses for manufacturing PCB circuit boards. The spot welding is particularly important for the welding of the circuit board, the performance of the circuit board is directly determined by the quality of the spot welding, when the circuit board is subjected to spot welding, the circuit board needs to be pressed to be tightly fixed, then current is switched on, and the spot welding of the circuit board is realized under the action of resistance heat.
Chinese patent CN110153521B discloses a fixing device for spot welding of a circuit board, which comprises a fixing frame, a bottom plate, a base, a fixing seat, a spot welding gun assembly, a workbench for fixing the circuit board, an adjusting and supporting assembly and a clamping and fixing assembly arranged on the workbench for clamping the circuit board; the circuit board fixing device is simple in structure and convenient to use, the circuit board can be conveniently fixed, the circuit board can be conveniently compressed in multiple modes, the compressing effect is good, the compressing area is large, the condition that the circuit board is damaged due to overlarge compressing force can be prevented, meanwhile, the compressing effect can be ensured in multiple modes of pressure, in addition, the workbench can be conveniently rotated during welding, angle deviation is realized, the optimal welding angle can be selected for welding, and the reliability of the circuit board is ensured.
However, since the sizes and heights of circuit elements on the circuit board are different, the circuit elements are difficult to fix, and therefore welding of the circuit elements on the current board is not facilitated.
Therefore, it is necessary to provide a spot welding apparatus for a printed circuit board and a welding method thereof to solve the above problems.
Disclosure of Invention
The invention aims to provide a printed circuit board spot welding device and a welding method thereof, which are used for solving the existing problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a spot welding device for a printed circuit board comprises a welding plate with a notch preset at the top, wherein a plurality of sleeves arranged according to the distribution of circuit board pins are arranged in the notch of the welding plate, through holes are formed in the sleeves of the welding plate, the through holes coincide with the central lines of the sleeves, welding rods are arranged in the sleeves, and a slice for cutting off the welding rods to enable the welding rods to be kept in the sleeves is arranged at the top of the sleeves;
the wiring board has been arranged in the alignment of welding plate on the vertical direction, be provided with the plug wire hole that supplies the welding rod to pass on the wiring board, the wiring board top is located the welding rod both sides and has arranged first compression roller and the second compression roller with welding rod in close contact with, and relative rotation through first compression roller and second compression roller orders about the welding rod downstream and passes the wiring board and enter into inside the sleeve on the welding plate.
According to a further scheme of the invention, sliding plates are welded on two sides of the slice, sliding blocks matched with the sliding plates are fixedly connected on two sides of the top of each welding plate, the sliding plates penetrate through sliding grooves preset in the sliding blocks and form a sliding fit relation with the sliding blocks, a pulling plate is fixedly connected to the top of one sliding plate, a first hydraulic cylinder is arranged on the outer side of the pulling plate, and the telescopic end of the first hydraulic cylinder is fixed to the pulling plate.
As a further scheme of the invention, the slices are arranged in a grid shape, and the slices are provided with ring-shaped cuts which are arranged at the opening of the top of the sleeve when the slices are arranged at the top of the sleeve.
As a further scheme of the invention, two sides of the welding plate are respectively provided with a driving ring, the outer side of each driving ring is provided with a supporting ring, and the supporting rings are driven by a second hydraulic cylinder to reciprocate on the vertical plane.
As a further scheme of the invention, a motor is arranged on one side of the support ring, a driving gear is arranged on an output shaft of the motor, and a second transmission gear meshed with the driving gear is arranged on the outer side of the driving ring.
As a further scheme of the patch board, vertical plates are fixedly connected to two sides of the top of the patch board, two ends of the first compression roller and two ends of the second compression roller are rotatably connected with the vertical plates through bearings, one ends of the first compression roller and the second compression roller penetrate through the vertical plates and are sleeved with belts on the outer sides of the first compression roller and the second compression roller, and the belts sequentially penetrate through the top of the outer side of the first compression roller and the bottom of the outer side of the second compression roller.
As a further scheme of the patch board, a rotating shaft is further arranged on one side of the patch board, a belt wheel is arranged on the outer side of the rotating shaft, the belt is sleeved on the outer side of the belt wheel, and the rotating shaft and the belt wheel are rotatably connected through a one-way bearing.
As a further scheme of the invention, one end of the rotating shaft, which is close to the support ring, is fixedly connected with a driven gear, a toothed plate is arranged on the outer side of the driven gear, a first transmission tooth meshed with the driven gear is arranged on the outer side of the top of one side, which is close to the driven gear, of the toothed plate, and the toothed plate is fixed with the support ring.
A printed circuit board welding method comprises the following steps:
s1, overturning the welding plate through the driving ring, placing the circuit board to be welded on the back of the welding plate, sequentially inserting circuit elements used for welding on the circuit board, and welding through the welding robot;
s2, taking down the welded circuit board and driving the welding plate to move upwards, so that the welding rods on the patch board are inserted into the sleeve on the welding plate, and the welding rods are cut off by slicing;
and S3, the welding plate moves downwards and drives the welding rod to downwards pass through the wiring hole, so that the welding rod is assembled on the wiring board.
According to the spot welding device for the printed circuit board, due to the fact that the sizes of the circuit elements on the circuit board are different, the circuit elements are difficult to fix in the welding process and cannot adapt to the circuit elements with different sizes, and the device can fix the circuit elements on the circuit board by utilizing the combination of the pins and the welding rods in the sleeve, meanwhile, the circuit board is fixed, and the pin is not in contact with the circuit elements but in contact with the circuit elements, so that the spot welding device for the printed circuit board is beneficial to fast fixing of the circuit elements on the circuit board, convenient and fast to operate and improvement of the efficiency of a welding machine.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a schematic view of the drive ring and weld plate configuration of the present invention;
FIG. 4 is a schematic view of a first hydraulic cylinder and slice attachment configuration of the present invention;
FIG. 5 is a schematic view of the weld plate, sleeve and slice position configuration of the present invention;
FIG. 6 is a schematic view of a welded plate construction of the present invention;
FIG. 7 is a schematic view of the first press roll, second press roll and belt configuration of the present invention;
FIG. 8 is an enlarged view of portion A of FIG. 2 in accordance with the present invention;
FIG. 9 is a schematic diagram of a circuit board plug-in state structure on a soldering board according to the present invention;
FIG. 10 is a schematic view of the welded sleeve and welded plate configuration of the present invention.
In the figure: 1. a base; 2. a support plate; 3. a through hole; 4. a support; 5. welding the plate; 6. a support ring; 7. a patch board; 8. welding rods; 9. a driven gear; 10. a first drive tooth; 11. a belt; 12. pulling a plate; 13. a first hydraulic cylinder; 14. a slide plate; 15. a slider; 16. a fixing plate; 17. a second hydraulic cylinder; 18. a motor; 19. a first press roll; 20. a second press roll; 21. slicing; 22. a driving gear; 23. a drive ring; 24. a second gear; 25. a sleeve; 26. a pin; 27. a separating surface; 28. a toothed plate; 29. a rotating shaft; 30. a circuit board.
Detailed Description
As shown in fig. 1-7, a printed circuit board spot welding device, including welded plate 5, the top surface of welded plate 5 is seted up flutedly, fixedly connected with sleeve 25 on the bottom surface in the recess, sleeve 25 top slides and is provided with section 21, slide 14 has all been welded to the both sides of section 21, and the equal fixedly connected with in welded plate 5 top both sides and slide 14 matched with slider 15, slide 14 passes and constitutes the sliding fit relation with slider 15 from the spout that predetermines on slider 15, top fixedly connected with arm-tie 12 at one of them slide 14, the outside of arm-tie 12 is provided with first pneumatic cylinder 13, the flexible end and the arm-tie 12 of first pneumatic cylinder 13 are fixed mutually, thereby remove about driving section 21 through arm-tie 12.
Further, the slices 21 are arranged in a grid and have a ring-shaped cut-out thereon, which is placed at the top opening of the sleeve 25 when the slices 21 are placed on top of the sleeve 25.
Still further, in order to facilitate the insertion of the circuit elements of the circuit board 30, the through hole 3 is formed in the soldering board 5, and the sleeve 25 is fixed to the through hole 3, so that the center lines of the sleeve 25, the through hole 3 and the annular notch of the slice 21 coincide with each other.
In order to turn over the welding plate 5 conveniently, two sides of the welding plate 5 are provided with a driving ring 23, two sides of the welding plate 5 are fixedly connected inside the driving ring 23, the outside of the driving ring 23 is provided with a supporting ring 6, the driving ring 23 is rotatably connected with the supporting ring 6, the bottom end of the bottom outside of the supporting ring 6 is fixedly connected with a bracket 4, the bottom of the bracket 4 is fixedly connected with a supporting plate 2, the outside of the supporting plate 2 is slidably provided with a base 1, the outside of the base 1 is fixedly connected with a fixing plate 16, the bottom end of the fixing plate 16 is provided with a second hydraulic cylinder 17, the output end of the second hydraulic cylinder 17 is connected with the fixing plate 16, so that the supporting plate 2 is driven to move up and down by the fixing plate 16, the outside of one of the supporting plates 2 is fixedly connected with a motor 18, the output shaft of the motor 18 is provided with a driving gear 22, and the outside of the driving ring 23 is provided with a second transmission gear 24 meshed with the driving gear 22, so that the second motor 18 can rotate the drive ring 23.
When in use, the output end of the motor 18 drives the transmission shaft to rotate, the transmission shaft can drive the driving gear 22 to rotate, the driving ring 23 can be driven to rotate by the meshing of the driving gear 22 and the second transmission gear 24, the driving ring 23 can drive the welding plate 5 to turn over, at this time, the circuit board 30 can be placed on the back surface of the welding plate 5, the supporting plate 2 can be supported by the welding plate 5, while the through holes 3 on the soldering plate 5 need to be arranged according to the distribution of the pins 26 on the circuit board 30 in actual use, so that the through holes 3 correspond one-to-one to the pins 26 on the circuit board 30, and at this time, when the circuit board 30 is placed on the back surface of the soldering board 5, electronic components to be soldered can be placed on the circuit board 30 so that the circular holes preset on the circuit board 30 correspond to the through holes 3 on the soldering board 5, and at this time, the pins 26 of the circuit components such as resistors, capacitors and the like pass through the through holes 3 on the circuit board 30 and the soldering board 5 and enter the sleeve 25; as shown in fig. 4-5, the welding rod 8 required for welding is arranged in advance in the sleeve 25, and the center of the welding rod 8 is provided with a through hole in advance, so that the pin 26 is just inserted into the through hole on the welding rod 8 when entering the sleeve 25, the through hole on the welding rod 8 and the pin 26 can adopt interference fit, the circuit board 30 can be fixed on the welding plate 5 by the cooperation of the through holes on the welding rod 8 and the pin 26 on the circuit element, and the circuit board 30 needs to be fixed by an additional tool, the structure is more novel and compact, and at this time, the welding rod 8 is limited by the sleeve 25, when the welding rod 8 melts in the sleeve 25, the welding rod just drops on the pin 26 in the sleeve 25, thereby completing the welding of the pin 26, and the welding point is more uniform and regular because of the limitation of the sleeve 25, on the one hand, the appearance of the circuit board 30 after welding can be improved, on the other hand, the reliability of the connection between the circuit element and the circuit board 30 can be improved; after the circuit element grafting is accomplished on circuit board 30, can drive driving gear 22 again through motor 18 output shaft and rotate, thereby drive driving ring 23 and continue to rotate, welding plate 5 overturns along with driving ring 23 rotation once more this moment, make circuit board 30 arrange the bottom in, and the recess on welding plate 5 rotates ascending position, utilize the welding robot to the inside soldering tin heat welding of arranging of sleeve 25 this moment, the soldering tin heat melts the back and flows down along the sleeve 25 inner wall, thereby drip to on the pin 26 in the sleeve 25, weld pin 26 and circuit board 30.
Further, in order to facilitate the separation of the circuit board 30 from the soldering board 5, a separation surface 27 is provided on the inner wall of the through-hole 3 of the soldering board 5, the separation surface 27 is made of a material that does not adhere to solder, such as iron oxide or titanium, as shown in fig. 9 to 10, when the welding rod 8 drops inside the through hole 3 in the welding plate 5 after melting inside the sleeve 25, further, the lead 26 is soldered to the inside surface of the through-hole 3, and a material such as iron oxide which does not adhere to the solder is applied to the inside surface of the through-hole, so that, when the solder drops inside the through-hole 3 there is a certain squeeze between the dropped solder and the wall of the hole after solidification due to the restriction of the wall of the hole, the pressing force of the plurality of through holes 3 on the solidified soldering tin can refuge the circuit board 30 to fall off, and the circuit board 30 can be removed by an external tool such as a fin or the like after the circuit components on the circuit board 30 are completely soldered.
Because the circuit components on the circuit board 30 are different in size, the circuit components are difficult to fix in the welding process and cannot adapt to the circuit components with different sizes, and by the device, the circuit components on the circuit board 30 can be fixed by utilizing the combination of the pins 26 and the welding rods 8 inside the sleeve 25, meanwhile, the circuit board 30 is also fixed, and the circuit components on the circuit board 30 are favorably and quickly fixed due to the fact that the circuit components are not in contact with the circuit components but in contact with the pins 26 on the circuit components, so that the operation is convenient and fast, and the efficiency of the welding machine is favorably improved.
In the prior art, for the fixation of the circuit elements on the circuit board 30, because the size of each circuit element is the same, when the circuit elements are installed on the current board 30, the surface of the circuit board 30 close to the circuit elements is uneven, so that the circuit elements are difficult to fix, and the pins are difficult to weld.
As shown in fig. 2-8, in order to quickly supplement the welding rod 8 inside the sleeve 25, a patch board 7 is arranged on the top of the welding plate 5, two sides of the patch board 7 are fixedly connected with a mounting plate for facilitating mounting of the patch board 7, a through patch hole is arranged on the patch board 7, a plurality of welding rods 8 are arranged on the patch board 7, the bottom ends of the welding rods 8 penetrate through the patch hole, a first compression roller 19 and a second compression roller 20 are respectively arranged on two sides of the welding rod 8, the first compression roller 19 and the second compression roller 20 are in close contact with the welding rod 8, so that the welding rod 8 can be driven to move downwards by relative rotation of the first compression roller 19 and the second compression roller 20, the welding rod 8 is vertically arranged on the patch board 7 in actual use, so that the welding rod 8 can be driven to move vertically downwards by relative rotation of the first compression roller 19 and the second compression roller 20, vertical plates are also fixedly connected on two sides of the top of the patch board 7, two ends of the first compression roller 19 and the second compression roller 20 are rotatably connected with the vertical plates through bearings, the riser is passed to the one end of first compression roller 19 and second compression roller 20 and has cup jointed belt 11 in its outside, belt 11 passes the outside top of first compression roller 19 and the outside bottom of second compression roller 20 in proper order, thereby make belt 11 rotate and to drive first compression roller 19 and second compression roller 20 and rotate relatively, wiring board 7 one side still is provided with pivot 29, the pivot 29 outside sets up the band pulley, the band pulley outside is located to belt 11 cover, and rotate through one-way bearing between pivot 29 and the band pulley and be connected, and pivot 29 is close to support ring 6 one end fixedly connected with driven gear 9, the driven gear 9 outside is provided with pinion rack 28, pinion rack 28 is provided with the first transmission tooth 10 with driven gear 9 engaged with near driven gear 9 one side top outside, and pinion rack 28 is fixed mutually with support ring 6.
During the use, after welding rod 8 inside sleeve 25 has been welded, can drive support 4 and support ring 6 rebound through second pneumatic cylinder 17, thereby drive ring 23 and its inside welding plate 5 rebound, the in-process that moves on welding plate 5 and contact with wiring board 7 gradually, welding rod 8 that wears out from the plug wire hole on the wiring board 7 can peg graft inside sleeve 25, in the time of the actual use, the opening part of sleeve 25 is provided with the fillet, make things convenient for welding rod 8 to peg graft inside sleeve 25, welding rod 8 constitutes interference fit with sleeve 25, be favorable to improving welding rod 8 and sleeve 25 welded fastness, thereby be convenient for pin 26 on the circuit component to inject inside welding rod 8, after welding rod 8 injects inside sleeve 25, can drive section 21 lateral shifting on the horizontal plane through the flexible end of first pneumatic cylinder 13, and the annular incision on section 21 is arranged in the opening position at sleeve 25 top, therefore, the welding rod 8 can be cut off through the annular notch, and the cut welding rod 8 is arranged inside the sleeve 25 at the moment, so that the welding rod is convenient to use for the next welding; as shown in fig. 1-2, at this time, the supporting plate 2 can be driven by the first hydraulic cylinder 13 to move downwards, and then the welding plate 5 is driven by the supporting ring 6 to move downwards, which is convenient for the next welding operation, and when the supporting ring 6 moves downwards, the first driving tooth 10 on the toothed plate 28 can be driven to move downwards, because the rotating shaft 29 is connected with the belt wheel by the one-way bearing, when the toothed plate 28 moves upwards, the first driving tooth 10 is meshed with the driven gear 9 on the rotating shaft 29 and can only drive the driven gear 9 and the rotating shaft 29 to rotate, and when the toothed plate 28 moves downwards, the belt wheel can be driven by the rotating shaft 29 to rotate, and then the belt 11 is driven to rotate, and the belt 11 can drive the first pressing roller 19 and the second pressing roller 20 to rotate, and then drive the welding rod 8 to move downwards for a distance, which is beneficial to later plugging with the sleeve 25 on the welding plate 5, and the patch board 7 can quickly supplement the welding rod 8 inside the sleeve 25 by matching of the welding plate 5 and the patch board 7, on one hand, the welding rod 8 is convenient to connect, and on the other hand, the welding efficiency can be improved.
The working principle is as follows: the output end of the motor 18 drives the transmission shaft to rotate, the transmission shaft can drive the driving gear 22 to rotate, the driving ring 23 can be driven to rotate by the meshing of the driving gear 22 and the second transmission gear 24, the driving ring 23 can drive the welding plate 5 to turn over, at this time, the circuit board 30 can be placed on the back surface of the welding plate 5, the supporting plate 2 can be supported by the welding plate 5, while the through holes 3 on the soldering plate 5 need to be arranged according to the distribution of the pins 26 on the circuit board 30 in actual use, so that the through holes 3 correspond one-to-one to the pins 26 on the circuit board 30, and at this time, when the circuit board 30 is placed on the back surface of the soldering board 5, electronic components to be soldered can be placed on the circuit board 30 so that the circular holes preset on the circuit board 30 correspond to the through holes 3 on the soldering board 5, and at this time, the pins 26 of the circuit components such as resistors, capacitors and the like pass through the through holes 3 on the circuit board 30 and the soldering board 5 and enter the sleeve 25; as shown in fig. 4-5, the welding rod 8 required for welding is arranged in advance in the sleeve 25, and the center of the welding rod 8 is provided with a through hole in advance, so that the pin 26 is just inserted into the through hole on the welding rod 8 when entering the sleeve 25, the through hole on the welding rod 8 and the pin 26 can adopt interference fit, the circuit board 30 can be fixed on the welding plate 5 by the cooperation of the through holes on the welding rod 8 and the pin 26 on the circuit element, and the circuit board 30 needs to be fixed by an additional tool, the structure is more novel and compact, and at this time, the welding rod 8 is limited by the sleeve 25, when the welding rod 8 melts in the sleeve 25, the welding rod just drops on the pin 26 in the sleeve 25, thereby completing the welding of the pin 26, and the welding point is more uniform and regular because of the limitation of the sleeve 25, on the one hand, the appearance of the circuit board 30 after welding can be improved, on the other hand, the reliability of the connection between the circuit element and the circuit board 30 can be improved; after the circuit element grafting is accomplished on circuit board 30, can drive driving gear 22 again through motor 18 output shaft and rotate, thereby drive driving ring 23 and continue to rotate, welding plate 5 overturns along with driving ring 23 rotation once more this moment, make circuit board 30 arrange the bottom in, and the recess on welding plate 5 rotates ascending position, utilize the welding robot to the inside soldering tin heat welding of arranging of sleeve 25 this moment, the soldering tin heat melts the back and flows down along the sleeve 25 inner wall, thereby drip to on the pin 26 in the sleeve 25, weld pin 26 and circuit board 30.
Claims (9)
1. The utility model provides a printed circuit board spot welding device which characterized in that: the welding plate is positioned in the notch and provided with a plurality of sleeves which are distributed according to pins on a circuit board, through holes are formed in the welding plate and positioned at the sleeves, the through holes are coincided with the central lines of the sleeves, welding rods are arranged in the sleeves, and the top of each sleeve is provided with a slice which cuts off the welding rods to enable the welding rods to be kept in the sleeves;
the wiring board has been arranged in the alignment of welding plate on the vertical direction, be provided with the plug wire hole that supplies the welding rod to pass on the wiring board, the wiring board top is located the welding rod both sides and has arranged first compression roller and the second compression roller with welding rod in close contact with, and relative rotation through first compression roller and second compression roller orders about the welding rod downstream and passes the wiring board and enter into inside the sleeve on the welding plate.
2. A printed circuit board spot welding apparatus according to claim 1, wherein: the sliced both sides all have welded the slide, the equal fixedly connected with in welding board top both sides and slide matched with slider, the slide passes and constitutes sliding fit relation with the slider from the spout that the slider was predetermine, and the top fixedly connected with arm-tie of one of them slide, the outside of arm-tie is provided with first pneumatic cylinder, the flexible end and the arm-tie of first pneumatic cylinder are fixed mutually.
3. A printed circuit board spot welding apparatus according to claim 1, wherein: the section sets up to latticed, have the ring incision on the section, the ring incision is arranged in sleeve top opening part when the section is arranged in the sleeve top.
4. A printed circuit board spot welding apparatus according to claim 1, wherein: and driving rings are arranged on two sides of the welding plate, supporting rings are arranged on the outer sides of the driving rings, and the supporting rings are driven by a second hydraulic cylinder to reciprocate on the vertical plane.
5. A printed circuit board spot welding apparatus according to claim 4, wherein: the motor is arranged on one side of the supporting ring, a driving gear is arranged on an output shaft of the motor, and second transmission teeth meshed with the driving gear are arranged on the outer side of the driving ring.
6. A printed circuit board spot welding apparatus according to claim 1, wherein: patch board top both sides fixedly connected with riser, first compression roller and second compression roller both ends are all rotated through bearing and riser and are connected, and the riser is passed and the belt has been cup jointed at its outside to the one end of first compression roller and second compression roller, and the outside top of first compression roller and the outside bottom of second compression roller are passed in proper order to the belt.
7. A printed circuit board spot welding apparatus according to claim 6, wherein: the patch board is characterized in that a rotating shaft is further arranged on one side of the patch board, a belt wheel is arranged on the outer side of the rotating shaft, the belt wheel is sleeved with the belt, and the rotating shaft is rotatably connected with the belt wheel through a one-way bearing.
8. A printed circuit board spot welding apparatus according to claim 7, wherein: the utility model discloses a gear, including support ring, pinion rack, driven gear, pinion rack and support ring, the pivot is close to support ring one end fixedly connected with driven gear, the driven gear outside is provided with the pinion rack, the pinion rack is close to driven gear one side top outside and is provided with the first transmission tooth with driven gear engaged with, the pinion rack is fixed mutually with the support ring.
9. A printed circuit board welding method is characterized in that: the method comprises the following steps:
s1, overturning the welding plate through the driving ring, placing the circuit board to be welded on the back of the welding plate, sequentially inserting circuit elements used for welding on the circuit board, and welding through the welding robot;
s2, taking down the welded circuit board and driving the welding plate to move upwards, so that the welding rods on the patch board are inserted into the sleeve on the welding plate, and the welding rods are cut off by slicing;
and S3, the welding plate moves downwards and drives the welding rod to downwards pass through the wiring hole, so that the welding rod is assembled on the wiring board.
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| CN202111308503.1A CN113878272B (en) | 2021-11-05 | 2021-11-05 | Spot welding device for printed circuit board and welding method thereof |
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| CN202111308503.1A CN113878272B (en) | 2021-11-05 | 2021-11-05 | Spot welding device for printed circuit board and welding method thereof |
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| CN113878272B CN113878272B (en) | 2024-04-09 |
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| CN113878272B (en) | 2024-04-09 |
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