CN113333891A - Automatic welding method and welding equipment for PCB circuit board lead - Google Patents
Automatic welding method and welding equipment for PCB circuit board lead Download PDFInfo
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- CN113333891A CN113333891A CN202110602765.2A CN202110602765A CN113333891A CN 113333891 A CN113333891 A CN 113333891A CN 202110602765 A CN202110602765 A CN 202110602765A CN 113333891 A CN113333891 A CN 113333891A
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- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/08—Soldering by means of dipping in molten solder
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/06—Solder feeding devices; Solder melting pans
- B23K3/0607—Solder feeding devices
- B23K3/063—Solder feeding devices for wire feeding
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/087—Soldering or brazing jigs, fixtures or clamping means
-
- 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)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The automatic welding equipment for the PCB circuit board lead comprises a rack, and a lead feeding device, a peeling device, a soldering flux soaking device, a tin soaking device, a welding device and a cutting device which are arranged on the rack, wherein the lead feeding device is arranged in the middle of the rack, the peeling device, the soldering flux soaking device, the tin soaking device, the welding device and the cutting device are sequentially arranged on the periphery of the lead feeding device in an arc surrounding manner, and the devices correspond to the lead feeding device. The wire feeding device is used for conveying wires for feeding, conveying the wires to be transported among stations, the peeling device is used for peeling the ends of the wires, the scaling powder soaking device and the tin soaking device respectively melt scaling powder and tin wires and wrap the exposed ends of the wires, the welding device is used for welding the wires on a circuit board together, and the cutting device is used for cutting the wires. The invention has the advantages of tin-sticking at the end of the wire, pre-welding of the circuit board and reliable connection quality.
Description
Technical Field
The invention relates to the field of electronic element production, in particular to an automatic welding method and welding equipment for a PCB circuit board lead.
Background
In the situation of continuous progress of science and technology, the frequency of using scientific and technological products is getting higher and higher, wherein electronic and computer products are the most important tools, the products are all composed of different circuit boards, and each circuit board is respectively welded with a connector and then is inserted with a flexible flat cable to be connected so as to transmit data. Therefore, a connection mode of directly welding a wire on a circuit board appears, at present, the technology of welding the wire on the PCB circuit board is generally that a manual handheld type or other heating devices are used for heating to melt soldering tin inside the wire, so that the wire and the PCB are welded.
The Chinese patent application (publication number: CN208820204U, published: 2019.05.03) discloses a soft flat cable hot-ironing welding machine, which comprises a base, wherein a power switch, a touch control display screen, an emergency brake button and a start button are arranged in front of the base, a fixing frame, a pneumatic cylinder and a positioning clamp assembly are arranged on the base, the fixing frame is arranged on two sides of the pneumatic cylinder, an isolation variable-voltage power box fixing frame is fixed in front of the fixing frame, an isolation variable-voltage power box is fixed in front of the isolation variable-voltage power box fixing frame, a welding assembly is connected below the isolation variable-voltage power box through a hollow telescopic block, and the welding assembly is connected with the pneumatic cylinder through a connecting rod.
The prior art has the following defects: 1. the lead and the circuit board are directly welded, so that the welding firmness degree is low, and the welding quality is poor; 2. the conducting wire conveying process is easy to make mistakes; 3. cutting the insulating layer to cut the metal wire when peeling; 4. the circuit board and the lead are welded in multiple steps, and the welding efficiency is low.
Disclosure of Invention
The invention aims to provide an automatic welding method and welding equipment for PCB circuit board leads, which are characterized in that the end parts of the leads are firstly stained with tin, the circuit board is prewelded and the connection quality is reliable, aiming at the problems that the leads and the circuit board are directly welded in the prior art, the welding firmness degree is low and the welding quality is poor.
For the purpose of the invention, the following technical scheme is adopted for realizing the purpose:
the automatic welding method of PCB circuit board wire, the apparatus that this method adopts includes the stander and wire feeding unit, debarking device, soaking the scaling powder device, soaking tin device, welding set and cut-off unit mounted on stander, the said wire feeding unit is set up in the middle part of the stander, debarking device, soaking the scaling powder device, soaking tin device, welding set and cut-off unit are set up in the circumference of the wire feeding unit sequentially in the form of circular arc, the above-mentioned device corresponds to wire feeding unit;
the device comprises a lead feeding device, a peeling device, a soldering flux soaking device, a tin soaking device, a welding device, a cutting device and a control device, wherein the lead feeding device is used for conveying leads to be fed and conveying the leads to be transferred among stations;
the method comprises the following steps of:
s1 peeling: the wire feeding device conveys the wire to the peeling device to peel off the insulating skin at the end part of the wire:
s2, wire tin immersion: coating the soldering flux on the lead at a soldering flux soaking device, and then soaking tin liquid on the tin soaking device;
s3 pre-welding of the circuit board: the welding device welds tin liquid on a wiring pole on a circuit board in advance;
s4 welding: the lead feeding device carries the lead above the circuit board at the welding device to realize the welding of the lead and the circuit board;
s5 fixed length cutting: the cutting device cuts off the conducting wires, and the circuit board connected with the conducting wires is collected.
Preferably, the lead feeding device comprises a mechanical arm, a lead plate, a lead combing assembly, a connecting support, a pressing cylinder, a lifting seat, a lead inlet plate, a lead outlet plate and a stretching cylinder; the wire combing machine comprises a mechanical arm, a connecting support, a wire combing assembly and a limiting plate, wherein the mechanical arm is fixed on a rack, the connecting support is arranged at the output tail end of the mechanical arm, the wire combing assembly is arranged on the connecting support, and the wire combing assembly comprises a lower frame body, an upper frame body, a wire combing wheel and the limiting plate; the lower frame body is fixed on the lifting seat, the upper frame body is positioned above the lower frame body, the lower frame body is movably connected with the upper frame body through a guide pillar, the wire combing wheel is rotatably connected on the lower frame body and the upper frame body, uniformly distributed annular grooves are formed in the side wall of the wire combing wheel, the width of each annular groove is matched with the diameter of a lead, and the wire combing wheel is arranged in a vertically staggered manner; the wire guide plate is arranged on the mechanical arm and is provided with a plurality of pores; the compression cylinder is arranged below the connecting support, linear bearings are arranged on two sides of the connecting support, the lifting seat is movably matched in the linear bearings, the telescopic end of the compression cylinder is connected with the lifting seat, and a compression block is arranged at the upper end of the lifting seat; a platform is arranged above the connecting support, and the pressing block corresponds to the platform from top to bottom; the wire inlet plate is arranged on a platform of the connecting support, the wire outlet plate is movably connected to the connecting support, and the bottoms of the wire inlet plate and the wire outlet plate are provided with thin through holes; the stretching cylinder is arranged on the connecting support, and the telescopic end of the stretching cylinder is connected with the wire outlet plate.
Preferably, the wire inlet plate and the wire outlet plate are arranged correspondingly, and the pressing block is positioned between the wire inlet plate and the wire outlet plate; the side edge of the connecting support is provided with a wedge block, the wire outlet plate is also provided with a wedge surface, and the wedge block and the wire outlet plate form a tip; the mechanical arm is further provided with a wire coil, and the wire coil is provided with coiled wires.
Preferably, the peeling device comprises a base, a movable cylinder, a movable seat, an air suction pipe, a movable cutting knife, a driving cylinder and a driving block; the movable seat is movably connected to the base through a sliding rail, the movable cylinder is installed on the base, and the telescopic end of the movable cylinder is connected with the movable seat; a notch is formed in the side face of the moving seat, the air suction pipe is mounted on the moving seat, a flat inlet is formed in the side of the air suction pipe, and the inlet is located at the notch; the other end of the air suction pipe is connected with a negative pressure dust collector; a linear guide rail is arranged on the side edge of the movable seat, and the movable cutting knife is connected to the movable seat through the linear guide rail; the movable cutting knife is provided with two pairs of cutting knives which are arranged oppositely, and the opposite side surfaces of the movable cutting knives are provided with cutting edges; a connecting seat is arranged on the side surface of the movable cutting knife, the roller is hinged on the connecting seat, a counter bore is formed in the connecting seat, and a spring is arranged in the counter bore; the driving cylinder is installed on the side of the movable seat, the driving block is installed on the driving cylinder, a wide portion and a narrow portion are arranged on the inner side of the driving block, an inclined surface is arranged between the wide portion and the narrow portion to be connected, and the driving block is in contact with the roller.
Preferably, the soldering flux soaking device comprises a heating pool, a lifting cylinder and a receiving groove, wherein the receiving groove is arranged at the telescopic end of the lifting cylinder, the receiving groove is arranged in the heating pool, and a long-strip-shaped sinking groove is arranged on the receiving groove.
Preferably, the tin immersion device comprises a tin liquid taking assembly, a tin scraping assembly and a tin pool, wherein the tin liquid taking assembly corresponds to the tin pool, and the tin scraping assembly corresponds to the side of the tin liquid taking assembly.
Preferably, the welding device comprises a first base, a tin wire feeding assembly, a circuit board feeding assembly, a second base, a circuit board feeding rail, a circuit board pushing assembly, a lifting seat assembly, a traction assembly, a wire pressing assembly and a welding assembly, wherein the tin wire feeding assembly and the circuit board feeding assembly are both arranged on the first base, the tin wire feeding assembly comprises a first connecting seat, two friction wheels, a friction wheel and a guide block, one friction wheel is arranged on a main shaft of the speed reducing motor, the speed reducing motor is arranged on the first connecting seat, the guide block is arranged on the first connecting seat, a guide hole is formed in the guide block, and the tin wire is guided through the guide hole and then sent out; the first connecting seat is also provided with a rotating shaft, a tin wire coil is arranged in the rotating shaft, and the tin wire is pressed by the two friction wheels; the circuit board feeding assembly comprises a conveying belt, a conveying frame and a conveying motor, wherein the conveying belt is connected to the conveying frame, and the conveying motor drives the conveying belt to rotate; the second base is arranged on the side of the first base, the circuit board feeding rail is fixedly arranged on the second base, the circuit board feeding rail is connected with the side of the circuit board feeding assembly, the lifting seat assembly is connected with the circuit board feeding rail, the wire pressing assembly corresponds to the upper part of the circuit board feeding rail, the traction assembly is arranged on the second base, the traction assembly corresponds to the wire pressing assembly from the side, the circuit board pushing assembly is connected with the circuit board feeding assembly and the circuit board feeding rail, the welding assembly is arranged on the second base, and the welding assembly corresponds to the lifting seat assembly from top to bottom; the circuit board pushing assembly is used for pushing the circuit board to the circuit board feeding rail from the circuit board feeding assembly, the lifting seat assembly is used for lifting the single circuit board, the traction assembly is used for pulling out the tin wire, and the wire pressing assembly is used for pressing the tin wire.
Preferably, the lifting seat assembly comprises a longitudinal moving cylinder, a lifting block and a lifting connecting seat, the longitudinal moving cylinder is installed on the second base, the lifting connecting seat is connected with the second base through a sliding rail, the lifting connecting seat is connected with the longitudinal moving cylinder, and the lifting block is installed on the lifting connecting seat; the circuit board pushing assembly comprises a pushing cylinder and a pushing block, the pushing block is arranged at the telescopic end of the pushing cylinder, the pushing cylinder is horizontally arranged, the pushing cylinder is arranged on the lifting connecting seat, and the pushing block corresponds to the circuit board feeding rail; the traction assembly comprises a pull-out air cylinder, a finger air cylinder and clamping fingers, the pull-out air cylinder is horizontally arranged on the second base, the finger air cylinder is arranged at the telescopic end of the pull-out air cylinder, and the clamping fingers are arranged at two moving ends of the finger air cylinder; the wire pressing assembly comprises a material passing channel, a micro-motion cylinder and an optical fiber sensor, the material passing channel is installed on the second base, a through hole is formed in the material passing channel and used for tin wires to pass through, a pressing column is arranged at the telescopic end of the micro-motion cylinder and corresponds to the through hole from the upper side to press the tin wires, and the optical fiber sensor also corresponds to the through hole and is used for detecting the feeding condition of the tin wires; the welding assembly comprises a support, a screw module, a welding head and a welding machine, the screw module is installed on the support, the welding machine is installed at the moving end of the screw module, the welding head is installed at the lower end of the welding machine, and the lower end of the welding head is provided with bar-shaped convex lines.
Preferably, the cutting device comprises a vertical plate, a driving assembly, a clamping cylinder, a clamping jaw, a gantry seat, an upper cylinder, a lower cylinder, an upper cutter, a lower cutter, a positioning seat and a storage tank, wherein the vertical plate is fixed on the rack, the driving assembly is arranged on the vertical plate, the clamping cylinder is arranged at the moving end of the driving assembly, and the clamping jaw is arranged at two moving ends of the clamping cylinder; the gantry base is arranged at the end part of the vertical plate, the upper air cylinder and the lower air cylinder are oppositely arranged at the upper end and the lower end of the gantry base, the upper cutter and the lower cutter are relatively matched on the gantry base in a sliding manner, cutting edges are arranged on the opposite side surfaces of the cutters, the upper cutter is connected with the telescopic end of the upper air cylinder, and the lower cutter is connected with the telescopic end of the lower air cylinder; the positioning seat is arranged on the side of the gantry seat, a notch is arranged in the middle of the positioning seat, and the position of the notch is matched with the size of the end part of the lead feeding device; the storage tank is arranged on the side of the vertical plate; the driving assembly drives the synchronous belt to move through the motor, the synchronous belt is connected with a connecting plate, and the connecting plate serves as a movement output end.
The PCB circuit board lead automatic welding method and the welding equipment adopting the technical scheme have the advantages that:
1. the wire feeding device is used for arranging the wires on the mechanical arm, the mechanical arm is used for driving the wires to be transferred among all stations, a specific jig is not required to be arranged for fixing the wires, and the wire conveying accuracy and conveying efficiency are improved; set up and stretch out the cylinder and drive the terminal realization of wire for a short distance and remove, solve the shortcoming that the arm motion is heavy, stretch out the cylinder and need concertina movement when realizing the wire welding through removing, need not to control the arm of articulated type, raise the efficiency, it compresses tightly the cylinder and compresses tightly the wire to set up, set up the accurate control wire position of outlet plate, can control the wire material loading, the length of control wire material loading, it is more accurate to compare the terminal mode of directly cliping, can not lead to the wire dislocation because of sending to many times.
2. The peeling device cuts off the insulating layer through the movable cutting knife which is opposite up and down, then the movable air cylinder is pulled out from the side to peel off the insulating layer, waste materials are collected through the air suction pipe, and horizontal cutting and peeling of the lead can be achieved; the cutting distance of the movable cutting knife is realized through the accurate control of the driving block, the telescopic influence of the driving cylinder is avoided, the metal wire is not cut off while the insulating layer is cut off, and the peeling quality is improved.
3. Welding set realizes material loading simultaneously through setting up tin silk pay-off subassembly and circuit board pay-off subassembly, make the tin silk be located the top of circuit board, be convenient for connect the welding in the space, the efficiency is improved, preweld in advance during welding circuit board and wire, the firm degree of improvement welding, because there are a plurality of wiring poles that parallel on the circuit board, adopt the horizontal welding mode, the tin silk melts the back and can adsorb on the wiring pole that is close to, can not disturb adjacent wiring pole, so once weld and can accomplish the multiple spot welding task, the efficiency of prewelding is improved.
Drawings
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a structural view of the present invention.
Fig. 3 is an exploded view of the wire feeding device.
Fig. 4 is an exploded view of the peeling apparatus.
Fig. 5 is an exploded view of a flux immersion device and a tin immersion device.
Fig. 6 is an exploded view of the welding apparatus.
Fig. 7 is a partial configuration view of the welding apparatus.
Fig. 8 is a structural diagram of the cutting device.
Detailed Description
As shown in figure 2, the automatic welding method for the PCB circuit board lead adopts equipment comprising a rack, and a lead feeding device 1, a peeling device 2, a soldering flux soaking device 3, a tin soaking device 4, a welding device 5 and a cutting device 6 which are arranged on the rack, wherein the lead feeding device 1 is arranged in the middle of the rack, the peeling device 2, the soldering flux soaking device 3, the tin soaking device 4, the welding device 5 and the cutting device 6 are sequentially arranged on the periphery of the lead feeding device 1 in an arc surrounding manner, and the devices correspond to the lead feeding device 1.
The lead feeding device 1 is used for conveying leads for feeding, conveying the leads to transfer among stations, the peeling device 2 is used for peeling the ends of the leads, the soldering flux soaking device 3 and the tin soaking device 4 respectively melt soldering flux and tin wires and wrap the exposed ends of the leads, the welding device 5 is used for welding the leads on a circuit board together, and the cutting device 6 is used for cutting the leads.
As shown in fig. 1, the method sequentially performs the processing through the following steps:
s1 peeling: the wire feeding device 1 conveys the wire to the peeling device 2 to peel off the insulating skin at the end part of the wire:
s2, wire tin immersion: firstly, coating the soldering flux on the lead at the soldering flux soaking device 3, and then soaking tin liquid at the tin soaking device 4;
s3 pre-welding of the circuit board: the soldering device 5 is used for soldering tin liquid on a wiring pole on a circuit board in advance;
s4 welding: the lead feeding device 1 carries the lead to the position above the circuit board at the welding device 5 to realize the welding of the lead and the circuit board;
s5 fixed length cutting: the cutting device 6 cuts off the conducting wires, and the circuit board connected with the conducting wires is collected.
As shown in fig. 3, the wire feeding device 1 includes a mechanical arm, a wire guide plate 11, a wire combing assembly 12, a connecting support 13, a pressing cylinder 14, a lifting seat 15, a wire inlet plate 16, a wire outlet plate 17 and a stretching cylinder 18; the mechanical arm is fixed on the frame, the connecting support 13 is arranged at the output end of the mechanical arm, the wire combing assembly 12 is arranged on the connecting support 13, and the wire combing assembly 12 comprises a lower frame body 121, an upper frame body 122, a wire combing wheel 123 and a limiting plate 124; the lower frame body 121 is fixed on the lifting seat 15, the upper frame body 122 is positioned above the lower frame body 121, the lower frame body 121 and the upper frame body 122 are movably connected through a guide post, the wire combing wheel 123 is rotatably connected on the lower frame body 121 and the upper frame body 122, uniformly distributed ring grooves are formed in the side wall of the wire combing wheel 123, the width of each ring groove is matched with the diameter of a lead, and the wire combing wheel 123 is arranged in a vertically staggered manner; the wire guide plate 11 is arranged on the mechanical arm, and a plurality of fine holes are formed in the wire guide plate 11, and wires enter the fine holes; the pressing cylinder 14 is installed below the connecting support 13, linear bearings are arranged on two sides of the connecting support 13, the lifting seat 15 is movably matched in the linear bearings, the telescopic end of the pressing cylinder 14 is connected with the lifting seat 15, and the upper end of the lifting seat 15 is provided with a pressing block 151; a platform 131 is arranged above the connecting support 13, and the pressing block 151 corresponds to the platform 131 from top to bottom and presses the conducting wire therein; the wire inlet plate 16 is arranged on the platform 131 of the connecting support 13, the wire outlet plate 17 is movably connected on the connecting support 13, thin through holes are formed in the bottoms of the wire inlet plate 16 and the wire outlet plate 17, and a lead passes through the thin through holes; the stretching cylinder 18 is arranged on the connecting support 13, and the telescopic end of the stretching cylinder 18 is connected with the outlet plate 17. The incoming line board 16 and the outgoing line board 17 are arranged correspondingly, and the pressing block 151 is located between the incoming line board 16 and the outgoing line board 17. The side of the connecting support 13 is provided with a wedge block 132, the outlet plate 17 is also provided with a wedge surface, and the wedge block 132 and the outlet plate 17 form a tip. The mechanical arm is further provided with a wire coil, and the wire coil is provided with coiled wires.
When the lead feeding device 1 works, leads firstly pass through the lead plate 11 and are combed through the wire combing wheel 123 after passing through the limiting plate 124, the left distance and the right distance are controlled, then the leads enter the lead plate 16 and are sent out from the lead plate 17, the leads extend out of the cylinder 18 to realize the telescopic movement of the micro distance of the leads, and the pressing cylinder 14 controls the lifting seat 15 to press the leads.
The wire feeding device 1 solves the problem that the wire conveying process is prone to errors, the wire is arranged on the mechanical arm, the mechanical arm drives the wire to transfer among stations, a special jig is not required to be arranged to fix the wire, and the wire conveying accuracy and conveying efficiency are improved; set up and stretch out cylinder 18 and drive the terminal realization of wire and remove at a short distance, solve the heavy shortcoming of arm motion, stretch out cylinder 18 and need concertina movement when realizing the wire welding through removing, need not to control the arm of articulated type, raise the efficiency, it compresses tightly cylinder 14 and compresses tightly the wire to set up, set up the accurate control wire position of outlet plate 17, can control the wire material loading, the length of control wire material loading, it is more accurate to compare the terminal direct mode of cliping, can not lead to the wire dislocation because of sending to many times.
As shown in FIG. 4, the peeling apparatus 2 comprises a base 21, a movable cylinder 22, a movable base 23, an air suction pipe 24, a movable cutter 25, a driving cylinder 26 and a driving block 27; the movable seat 23 is movably connected to the base 21 through a slide rail, the movable cylinder 22 is installed on the base 21, and the telescopic end of the movable cylinder 22 is connected with the movable seat 23; a notch 231 is arranged on the side surface of the movable seat 23, the air suction pipe 24 is arranged on the movable seat 23, a flat inlet is arranged on the side of the air suction pipe 24, and the inlet is positioned at the notch 231; the other end of the air suction pipe 24 is connected with a negative pressure dust collector; a linear guide rail 28 is arranged on the side edge of the movable seat 23, and the movable cutting knife 25 is connected to the movable seat 23 through the linear guide rail 28; the two movable cutters 25 are arranged oppositely, and the opposite side surfaces of the movable cutters 25 are provided with cutting edges; a connecting seat 253 is arranged on the side surface of the movable cutting knife 25, the roller 251 is hinged on the connecting seat 253, a counter bore 252 is formed in the connecting seat 253, and a spring is arranged in the counter bore; the driving cylinder 26 is installed on the side of the moving seat 23, the driving block 27 is installed on the driving cylinder 26, the inner side of the driving block 27 is provided with a wide part 271 and a narrow part 272, an inclined surface is arranged between the wide part 271 and the narrow part 272 for engagement, and the driving block 27 is in contact with the roller 251.
When the peeling device 2 works, the driving cylinder 26 extends to drive the driving block 27 to push out, the driving block 27 drives the two movable cutting knives 25 to approach each other to cut off the insulating layer of the conducting wire, then the movable cylinder 22 contracts to drive the movable seat 23 to move, the cut insulating layer is peeled off by the movable cutting knives 25, and the insulating layer waste is sucked away through the air suction pipe 24.
The peeling device 2 solves the problem that the insulating layer is cut by cutting metal wires when peeling is carried out, the insulating layer is cut by the aid of the movable cutting knife 25 which is opposite up and down, then the movable air cylinder 22 is pulled out from the side, the insulating layer is peeled, waste materials are collected through the air suction pipe 24, and horizontal cutting and peeling of the lead can be achieved; the cutting distance of the movable cutting knife 25 is realized through the accurate control of the driving block 27, the expansion and contraction of the driving cylinder 26 are not influenced, the insulating layer can be cut off, meanwhile, the metal wire is not cut off, and the peeling quality is improved.
As shown in fig. 5, the flux soaking device 3 includes a heating tank 31, a lifting cylinder 32 and a receiving tank 33, the receiving tank 33 is installed at the telescopic end of the lifting cylinder 32, the receiving tank 33 is disposed in the heating tank 31, and a strip-shaped sinking tank is disposed on the receiving tank 33 and is used for receiving melted flux. The tin immersion device 4 comprises a tin liquid taking assembly 41, a tin scraping assembly 42 and a tin pool 43, wherein the tin liquid taking assembly 41 corresponds to the tin pool 43, and the tin scraping assembly 42 corresponds to the side of the tin liquid taking assembly 41.
As shown in fig. 6, the welding device 5 includes a first base 51, a tin wire feeding assembly 52, a circuit board feeding assembly 53, a second base 54, a circuit board feeding rail 55, a circuit board pushing assembly 551, a lifting seat assembly 56, a traction assembly 57, a wire pressing assembly 58 and a welding assembly 59, wherein the tin wire feeding assembly 52 and the circuit board feeding assembly 53 are both installed on the first base 51, the tin wire feeding assembly 52 includes a first connecting seat 521, a speed reducing motor 522, friction wheels 523 and guide blocks 524, two friction wheels 523 are provided, one friction wheel 523 is installed on a main shaft of the speed reducing motor 522, the speed reducing motor 522 is installed on the first connecting seat 521, the guide blocks 524 are all arranged on the first connecting seat 521, guide holes are provided on the guide blocks 524, and the tin wire is guided and then sent out through the guide holes; the first connecting seat 521 is further provided with a rotating shaft, a tin wire coil is arranged in the rotating shaft, and the tin wire is pressed by the two friction wheels 523. The circuit board feeding assembly 53 comprises a conveying belt 531, a conveying frame 532 and a conveying motor 533, wherein the conveying belt 531 is connected to the conveying frame 532, and the conveying motor 533 drives the conveying belt 531 to rotate. The second base 54 is arranged on the side of the first base 51, the circuit board feeding rail 55 is fixedly arranged on the second base 54, the circuit board feeding rail 55 is connected with the side of the circuit board feeding assembly 53, the lifting seat assembly 56 is connected with the circuit board feeding rail 55, the wire pressing assembly 58 corresponds to the upper portion of the circuit board feeding rail 55, the traction assembly 57 is arranged on the second base 54, the traction assembly 57 corresponds to the wire pressing assembly 58 from the side, the circuit board pushing assembly 551 is connected with the circuit board feeding assembly 53 and the circuit board feeding rail 55, the welding assembly 59 is arranged on the second base 54, and the welding assembly 59 corresponds to the lifting seat assembly 56 from top to bottom. The circuit board pushing assembly 551 is used for pushing the circuit board from the circuit board feeding assembly 53 to the circuit board feeding rail 55, the lifting seat assembly 56 is used for lifting the single circuit board, the traction assembly 57 is used for pulling out the tin wire, and the wire pressing assembly 58 is used for pressing the tin wire.
The lifting seat assembly 56 comprises a longitudinal moving cylinder 561, a lifting block 562 and a lifting connecting seat 563, wherein the longitudinal moving cylinder 561 is installed on the second base 54, the lifting connecting seat 563 is connected with the second base 54 through a sliding rail, the lifting connecting seat 563 is connected with the longitudinal moving cylinder 561, and the lifting block 562 is installed on the lifting connecting seat 563; the circuit board pushing assembly 551 comprises a pushing cylinder 5511 and a pushing block 5512, the pushing block 5512 is mounted at the telescopic end of the pushing cylinder 5511, the pushing cylinder 5511 is horizontally mounted, the pushing cylinder 5511 is mounted on the lifting connecting seat 563, and the pushing block 5512 corresponds to the circuit board feeding rail 55.
The traction assembly 57 comprises a pulling cylinder 571, a finger cylinder 572 and a clamping finger 573, wherein the pulling cylinder 571 is horizontally arranged on the second base 54, the finger cylinder 572 is arranged at the telescopic end of the pulling cylinder 571, and the clamping finger 573 is arranged at the two movable ends of the finger cylinder 572; the wire pressing assembly 58 comprises a material passing channel 581, a micro-motion cylinder 582 and an optical fiber sensor 583, wherein the material passing channel 581 is installed on the second base 54, a through hole is formed in the material passing channel 581 and used for a tin wire to pass through, a compression column is arranged at the telescopic end of the micro-motion cylinder 582 and corresponds to the through hole from the top and presses the tin wire, and the optical fiber sensor 583 also corresponds to the through hole and is used for detecting the feeding condition of the tin wire. Welding subassembly 59 include support 591, lead screw module 592, soldered connection 593 and welding machine 594, lead screw module 592 installs on support 591, and welding machine 594 installs the removal end at lead screw module 592, and soldered connection 593 installs the lower extreme at welding machine 594, and the lower extreme of soldered connection 593 is provided with the bar burr.
Welding set 5 is at the during operation, the circuit board is through circuit board pay-off subassembly 53 material loading back, push away the circuit board by circuit board material pushing component 551 and push away circuit board feeding rail 55, lift up after the circuit board reachs lifter seat subassembly 56 department, simultaneously, the tin silk sees off through tin silk pay-off subassembly 52, after pressing silk subassembly 58, pulled out by traction assembly 57, then press silk subassembly 58 to compress tightly the tin silk, the tin silk of pulling out is located the circuit board, then welding subassembly 59 descends, with the tin silk prewelding on the circuit board, then the wire is placed on the circuit board, welding subassembly 59 realizes the welding between wire and the circuit board once more.
Welding set 5 has solved between circuit board and the wire welding step many, the problem of welding inefficiency, realize the material loading simultaneously through setting up tin silk pay-off subassembly 52 and circuit board pay-off subassembly 53, make the tin silk be located the top of circuit board, the space is convenient for connect the welding, the efficiency is improved, preweld first when welding circuit board and wire, improve the firm degree of welding, because there are a plurality of wiring poles that parallel on the circuit board, adopt the mode of horizontal welding, the tin silk melts the back and can adsorb on being close to the wiring pole, can not disturb adjacent wiring pole, the multiple spot welding task can be accomplished in the welding of event, improve preweld efficiency.
As shown in fig. 7, the cutting device 6 includes a vertical plate 61, a driving assembly 62, a clamping cylinder 63, a clamping jaw 64, a gantry base 65, an upper cylinder 661, a lower cylinder 662, an upper cutter 671, a lower cutter 672, a positioning base 68 and a storage tank 69, the vertical plate 61 is fixed on the frame, the driving assembly 62 is arranged on the vertical plate 61, the clamping cylinder 63 is installed at the moving end of the driving assembly 62, and the clamping jaw 64 is installed at the two moving ends of the clamping cylinder 63; the gantry base 65 is arranged at the end part of the vertical plate 61, the upper cylinder 661 and the lower cylinder 662 are oppositely arranged at the upper end and the lower end of the gantry base 65, the upper cutter 671 and the lower cutter 672 are relatively matched on the gantry base 65 in a sliding manner, cutting edges are arranged on the opposite side surfaces of the cutters, the upper cutter 671 is connected with the telescopic end of the upper cylinder 661, and the lower cutter 672 is connected with the telescopic end of the lower cylinder 662; the positioning seat 68 is installed on the side of the gantry seat 65, a notch 681 is arranged in the middle of the positioning seat 68, and the position of the notch 681 is matched with the size of the end of the lead feeding device 1; the storage tank 69 is arranged on the side of the vertical plate 61; the driving assembly 62 drives the synchronous belt to move through a motor, the synchronous belt is connected with a connecting plate, and the connecting plate serves as a movement output end.
Cutting device 6 is at the during operation, and wire material feeding unit 1 places the circuit board that welds in positioning seat 68 department, and then drive assembly 62 drives to press from both sides and gets cylinder 63 and be close to, and the circuit board is cliied to clamping jaw 64, and then drive assembly 62 pulls out, makes the circuit board that has the wire pull out, and then goes up cutter 671, lower cutter 672 and is close to each other, cuts off the wire, and the product that surely falls realizes collecting in stock chest 69 department.
Claims (10)
1. The automatic welding method for the PCB circuit board lead is characterized by comprising a rack, and a lead feeding device (1), a peeling device (2), a soldering flux soaking device (3), a tin soaking device (4), a welding device (5) and a cutting device (6) which are arranged on the rack, wherein the lead feeding device (1) is arranged in the middle of the rack, the peeling device (2), the soldering flux soaking device (3), the tin soaking device (4), the welding device (5) and the cutting device (6) are sequentially arranged on the periphery of the lead feeding device (1) in an arc surrounding manner, and the devices correspond to the lead feeding device (1);
the wire feeding device (1) is used for conveying wires for feeding and transporting the wires among stations, the peeling device (2) is used for peeling the ends of the wires, the soldering flux soaking device (3) and the tin soaking device (4) respectively melt soldering flux and tin wires and wrap the soldering flux and tin wires on the exposed ends of the wires, the welding device (5) is used for welding the wires on a circuit board together, and the cutting device (6) is used for cutting the wires;
the method comprises the following steps of:
s1 peeling of the lead: the wire feeding device (1) conveys the wire to the peeling device (2) to peel off the insulating skin at the end part of the wire:
s2, wire tin immersion: the lead is coated with the soldering flux at the soldering flux soaking device (3) and then dipped with the tin liquid at the tin soaking device (4);
s3 pre-welding of the circuit board: the welding device (5) welds tin liquid on the wiring pole on the circuit board in advance;
s4 welding: the lead feeding device (1) carries the lead to the position above the circuit board at the welding device (5) to realize the welding of the lead and the circuit board;
s5 fixed length cutting: the cutting device (6) cuts off the conducting wires, and the circuit board connected with the conducting wires is collected.
2. The automatic welding method for the PCB circuit board lead according to claim 1, wherein the lead feeding device (1) comprises a mechanical arm, a lead plate (11), a wire combing assembly (12), a connecting support (13), a pressing cylinder (14), a lifting seat (15), a wire inlet plate (16), a wire outlet plate (17) and an extending cylinder (18); the mechanical arm is fixed on the rack, the connecting support (13) is installed at the output tail end of the mechanical arm, the wire combing assembly (12) is installed on the connecting support (13), and the wire combing assembly (12) comprises a lower frame body (121), an upper frame body (122), a wire combing wheel (123) and a limiting plate (124); the lower frame body (121) is fixed on the lifting seat (15), the upper frame body (122) is positioned above the lower frame body (121), the lower frame body (121) is movably connected with the upper frame body (122) through a guide post, the wire combing wheel (123) is rotatably connected on the lower frame body (121) and the upper frame body (122), the side wall of the wire combing wheel (123) is provided with uniformly distributed ring grooves, the width of the ring grooves is matched with the diameter of a lead, and the wire combing wheel (123) is arranged in a vertically staggered manner; the wire guide plate (11) is arranged on the mechanical arm, and a plurality of pores are arranged on the wire guide plate (11); the pressing cylinder (14) is installed below the connecting support (13), linear bearings are arranged on two sides of the connecting support (13), the lifting seat (15) is movably matched in the linear bearings, the telescopic end of the pressing cylinder (14) is connected with the lifting seat (15), and a pressing block (151) is arranged at the upper end of the lifting seat (15); a platform (131) is arranged above the connecting support (13), and the pressing block (151) corresponds to the platform (131) from top to bottom; the wire inlet plate (16) is arranged on a platform (131) of the connecting support (13), the wire outlet plate (17) is movably connected to the connecting support (13), and thin through holes are formed in the bottoms of the wire inlet plate (16) and the wire outlet plate (17); the stretching cylinder (18) is arranged on the connecting support (13), and the telescopic end of the stretching cylinder (18) is connected with the wire outlet plate (17).
3. The automatic welding method for the PCB leads according to claim 2, characterized in that the incoming line board (16) and the outgoing line board (17) are arranged correspondingly, and the compression block (151) is positioned between the incoming line board (16) and the outgoing line board (17); a wedge block (132) is arranged on the side edge of the connecting support (13), a wedge surface is also arranged on the wire outlet plate (17), and the wedge block (132) and the wire outlet plate (17) form a tip; the mechanical arm is further provided with a wire coil, and the wire coil is provided with coiled wires.
4. The automatic welding method for the PCB wire leads according to claim 1, wherein the peeling device (2) comprises a base (21), a moving cylinder (22), a moving seat (23), an air suction pipe (24), a moving cutting knife (25), a driving cylinder (26) and a driving block (27); the movable seat (23) is movably connected to the base (21) through a sliding rail, the movable cylinder (22) is installed on the base (21), and the telescopic end of the movable cylinder (22) is connected with the movable seat (23); a notch (231) is formed in the side face of the moving seat (23), the air suction pipe (24) is installed on the moving seat (23), a flat inlet is formed in the side of the air suction pipe (24), and the inlet is located at the notch (231); the other end of the air suction pipe (24) is connected with a negative pressure dust collector; a linear guide rail (28) is arranged on the side edge of the movable seat (23), and the movable cutting knife (25) is connected to the movable seat (23) through the linear guide rail (28); the two movable cutters (25) are arranged oppositely, and the opposite side surfaces of the movable cutters (25) are provided with cutting edges; a connecting seat (253) is arranged on the side surface of the movable cutting knife (25), the roller (251) is hinged on the connecting seat (253), a counter bore (252) is formed in the connecting seat (253), and a spring is arranged in the counter bore; the driving cylinder (26) is arranged on the side of the moving seat (23), the driving block (27) is arranged on the driving cylinder (26), a wide part (271) and a narrow part (272) are arranged on the inner side of the driving block (27), an inclined surface is arranged between the wide part (271) and the narrow part (272) for connection, and the driving block (27) is in contact with the roller (251).
5. The automatic welding method for the PCB wire according to claim 1, wherein the flux soaking device (3) comprises a heating pool (31), a lifting cylinder (32) and a receiving groove (33), the receiving groove (33) is installed at the telescopic end of the lifting cylinder (32), the receiving groove (33) is arranged in the heating pool (31), and a strip-shaped sinking groove is arranged on the receiving groove (33).
6. The automatic welding method for the PCB circuit board lead according to claim 1, wherein the tin immersion device (4) comprises a tin liquid taking component (41), a tin scraping component (42) and a tin pool (43), the tin liquid taking component (41) corresponds to the tin pool (43), and the tin scraping component (42) corresponds to the side of the tin liquid taking component (41).
7. The automatic welding method for the PCB circuit board lead according to claim 1, wherein the welding device (5) comprises a first base (51), a tin wire feeding assembly (52), a circuit board feeding assembly (53), a second base (54), a circuit board feeding rail (55), a circuit board pushing assembly (551), a lifting seat assembly (56), a traction assembly (57), a wire pressing assembly (58) and a welding assembly (59), wherein the tin wire feeding assembly (52) and the circuit board feeding assembly (53) are both arranged on the first base (51), the tin wire feeding assembly (52) comprises a first connecting seat (521), a speed reducing motor (522), a friction wheel (523) and a guide block (524), two friction wheels (523) are arranged, one friction wheel (523) is arranged on a main shaft of the speed reducing motor (522), and the speed reducing motor (522) is arranged on the first connecting seat (521), the guide blocks (524) are all arranged on the first connecting seat (521), guide holes are formed in the guide blocks (524), and the tin wires are guided through the guide holes and then sent out; a rotating shaft is also arranged on the first connecting seat (521), a tin wire coil is arranged in the rotating shaft, and the tin wire is tightly pressed by two friction wheels (523); the circuit board feeding assembly (53) comprises a conveying belt (531), a conveying frame (532) and a conveying motor (533), the conveying belt (531) is connected to the conveying frame (532), and the conveying motor (533) drives the conveying belt (531) to rotate; the second base (54) is arranged on the side of the first base (51), the circuit board feeding rail (55) is fixedly arranged on the second base (54), the circuit board feeding rail (55) is connected with the side of the circuit board feeding assembly (53), the lifting seat assembly (56) is connected with the circuit board feeding rail (55), the wire pressing assembly (58) corresponds to the upper part of the circuit board feeding rail (55), the traction assembly (57) is arranged on the second base (54), the traction assembly (57) corresponds to the wire pressing assembly (58) from the side, the circuit board feeding assembly (551) is connected with the circuit board feeding assembly (53) and the circuit board feeding rail (55), the welding assembly (59) is arranged on the second base (54), and the welding assembly (59) corresponds to the lifting seat assembly (56) from top to bottom; the circuit board pushing assembly (551) is used for pushing the circuit board from the circuit board feeding assembly (53) to the circuit board feeding rail (55), the lifting seat assembly (56) is used for lifting the single circuit board, the traction assembly (57) is used for pulling out the tin wire, and the wire pressing assembly (58) is used for pressing the tin wire.
8. The automatic welding method for the PCB circuit board lead according to claim 7, wherein the lifting seat assembly (56) comprises a longitudinal moving cylinder (561), a lifting block (562) and a lifting connecting seat (563), the longitudinal moving cylinder (561) is installed on the second base (54), the lifting connecting seat (563) is connected with the second base (54) through a sliding rail, the lifting connecting seat (563) is connected with the longitudinal moving cylinder (561), and the lifting block (562) is installed on the lifting connecting seat (563); the circuit board pushing assembly (551) comprises a pushing cylinder (5511) and a pushing block (5512), the pushing block (5512) is installed at the telescopic end of the pushing cylinder (5511), the pushing cylinder (5511) is horizontally installed, the pushing cylinder (5511) is installed on the lifting connecting seat (563), and the pushing block (5512) corresponds to the circuit board feeding rail (55); the traction assembly (57) comprises a pulling cylinder (571), a finger cylinder (572) and a clamping finger (573), the pulling cylinder (571) is horizontally arranged on the second base (54), the finger cylinder (572) is arranged at the telescopic end of the pulling cylinder (571), and the clamping finger (573) is arranged at two moving ends of the finger cylinder (572); the tin wire pressing assembly (58) comprises a material passing channel (581), a micro-motion cylinder (582) and an optical fiber sensor (583), wherein the material passing channel (581) is installed on the second base (54), a through hole is formed in the material passing channel (581), the through hole is used for tin wires to pass through, a pressing column is arranged at the telescopic end of the micro-motion cylinder (582), corresponds to the through hole from the upper side and presses the tin wires, and the optical fiber sensor (583) also corresponds to the through hole and is used for detecting the feeding condition of the tin wires; welding subassembly (59) include support (591), lead screw module (592), soldered connection (593) and welding machine (594), lead screw module (592) is installed on support (591), the removal end at lead screw module (592) is installed in welding machine (594), the lower extreme at welding machine (594) is installed in soldered connection (593), the lower extreme of soldered connection (593) is provided with the bar burr.
9. The automatic welding method for the PCB circuit board lead according to claim 1, wherein the cutting device (6) comprises a vertical plate (61), a driving assembly (62), a clamping cylinder (63), a clamping jaw (64), a gantry base (65), an upper cylinder (661), a lower cylinder (662), an upper cutter (671), a lower cutter (672), a positioning base (68) and a storage tank (69), the vertical plate (61) is fixed on the frame, the driving assembly (62) is arranged on the vertical plate (61), the clamping cylinder (63) is arranged at the moving end of the driving assembly (62), and the clamping jaw (64) is arranged at the two moving ends of the clamping cylinder (63); the gantry base (65) is arranged at the end part of the vertical plate (61), the upper air cylinder (661) and the lower air cylinder (662) are oppositely arranged at the upper end and the lower end of the gantry base (65), the upper cutter (671) and the lower cutter (672) are in relative sliding fit on the gantry base (65), cutting edges are arranged on the opposite side surfaces of the cutters, the upper cutter (671) is connected with the telescopic end of the upper air cylinder (661), and the lower cutter (672) is connected with the telescopic end of the lower air cylinder (662); the positioning seat (68) is arranged on the side of the gantry seat (65), a notch (681) is arranged in the middle of the positioning seat (68), and the position of the notch (681) is matched with the size of the end part of the lead feeding device (1); the storage tank (69) is arranged on the side of the vertical plate (61); the driving assembly (62) drives the synchronous belt to move through the motor, the synchronous belt is connected with a connecting plate, and the connecting plate serves as a movement output end.
10. An automatic soldering device for PCB circuit board leads, which is characterized in that the device is soldered by the method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110602765.2A CN113333891A (en) | 2021-05-31 | 2021-05-31 | Automatic welding method and welding equipment for PCB circuit board lead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110602765.2A CN113333891A (en) | 2021-05-31 | 2021-05-31 | Automatic welding method and welding equipment for PCB circuit board lead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113333891A true CN113333891A (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110602765.2A Withdrawn CN113333891A (en) | 2021-05-31 | 2021-05-31 | Automatic welding method and welding equipment for PCB circuit board lead |
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| Country | Link |
|---|---|
| CN (1) | CN113333891A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114340140A (en) * | 2021-12-07 | 2022-04-12 | 湖南维胜科技电路板有限公司 | PCB and tin soldering process thereof |
| CN117600728A (en) * | 2024-01-24 | 2024-02-27 | 四川蜀能电力有限公司 | Copper stranded wire welding auxiliary device for transformer substation construction |
-
2021
- 2021-05-31 CN CN202110602765.2A patent/CN113333891A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114340140A (en) * | 2021-12-07 | 2022-04-12 | 湖南维胜科技电路板有限公司 | PCB and tin soldering process thereof |
| CN114340140B (en) * | 2021-12-07 | 2024-01-30 | 湖南维胜科技电路板有限公司 | PCB processing device and processing technology thereof |
| CN117600728A (en) * | 2024-01-24 | 2024-02-27 | 四川蜀能电力有限公司 | Copper stranded wire welding auxiliary device for transformer substation construction |
| CN117600728B (en) * | 2024-01-24 | 2024-04-12 | 四川蜀能电力有限公司 | Copper stranded wire welding auxiliary device for transformer substation construction |
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Application publication date: 20210903 |
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