CN108213645B - Automatic welding machine for power supply DC line - Google Patents

Automatic welding machine for power supply DC line Download PDF

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Publication number
CN108213645B
CN108213645B CN201810201570.5A CN201810201570A CN108213645B CN 108213645 B CN108213645 B CN 108213645B CN 201810201570 A CN201810201570 A CN 201810201570A CN 108213645 B CN108213645 B CN 108213645B
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China
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welding
seat
power supply
jig
positioning
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CN201810201570.5A
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CN108213645A (en
Inventor
章胜华
梁德荣
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Shenzhen Sinvo Automatic Co Ltd
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Shenzhen Sinvo Automatic Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K3/00Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • B23K3/08Auxiliary devices therefor
    • B23K3/087Soldering or brazing jigs, fixtures or clamping means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K3/00Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • B23K3/08Auxiliary devices therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P23/00Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
    • B23P23/06Metal-working plant comprising a number of associated machines or apparatus

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Resistance Welding (AREA)

Abstract

The invention discloses an automatic power supply DC line welding machine, which comprises a conveying pull body, a jig positioning mechanism, a pressing mechanism and a welding mechanism, wherein the conveying pull body is arranged on a rack along the left-right direction; the jig comprises at least two jigs, and the jigs are placed on the conveying pull body; at least two sets of power supply PCB boards and power supply DC lines are arranged on the jig; the side part of the conveying pull body is provided with a welding station; the jig positioning mechanism is arranged at the welding station; the pressing mechanism is arranged at the front side of the jig positioning mechanism; the welding mechanism is arranged above the conveying pull body in a crossing way and corresponds to the jig positioning mechanism, and the welding mechanism fixes soldering tin at the joint between the power DC line and the power PCB; and after the soldering tin is finished, the jig positioning mechanism releases the jig. The invention realizes the automatic transmission and effective connection of the PCB and the DC line, stably clamps the PCB and the DC line, and realizes accurate welding and automatic smoke discharge by the welding mechanism with flexible fine adjustment function, thereby having high welding efficiency.

Description

Automatic welding machine for power supply DC line
Technical Field
The invention relates to the field of mechanical automation, in particular to an automatic welding machine for a power supply DC line.
Background
The good characteristics of the lithium ion battery per se enable the lithium ion battery to be widely applied to portable products (mobile phones, notebook computers, tablet personal computers and the like), and the power supply (portable charger) for the lithium ion battery is gradually perfected in design and function. The power supply is assembled by parts such as a PCB, a DC line, an upper cover, a lower cover and the like, so that the circuit conduction is realized. The circuit of power is switched on and is needed to weld PCB board and DC line, one end of DC line is connected in the wiring hole on PCB board, the other end is power connection, PCB board is connected with the electric connection piece of upper cover, the electric connection piece inserts in the socket, power connection inserts in the portable product of standby electricity, realizes electric energy transmission. In the production and assembly process of the power supply, the welding of the DC line and the PCB is an action with higher precision requirement, two connectors of the DC line are required to be inserted into two wiring holes of the PCB before welding, and the connectors are fixed with the wiring holes of the PCB through welding guns in a tin welding mode. Traditional DC line welding is generally completed through manual spot welding, the soldering efficiency of the mode is lower, along with the improvement of labor cost, the manual soldering cost is higher and higher, and automatic soldering of a power supply DC line is a trend of future development. Based on the limitation of the shape and the size of the wiring hole of the power DC line connector and the PCB and the vulnerable characteristic of the PCB, the following technical difficulties exist in the process of realizing automatic soldering of the power DC line: 1. the PCB flows, positions and is automatically and effectively connected with a welding mechanism to ensure smooth and automatic operation of the whole wire; 2. the PCB is effectively clamped and fixed with the DC lines so as to provide a stable welding environment for the welding mechanism; 3. the welding precision is effectively controlled; 4. the automatic smoke discharging problem of welding; 5. welding efficiency problems.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides the automatic welding machine for the power DC line, which realizes the automatic transmission and the effective welding connection of the PCB and the DC line through the mutual cooperation of the transmission pull body and the jig positioning mechanism, stably and effectively clamps the PCB and the DC line through the jig, realizes the accurate welding and the automatic smoke discharge through the welding mechanism with the flexible fine adjustment function, and has high welding efficiency.
The technical scheme adopted by the invention is as follows: the automatic power supply DC line welding machine comprises a conveying pull body, a jig positioning mechanism, a pressing mechanism and a welding mechanism, wherein the conveying pull body is arranged on a frame along the left-right direction, and a linear conveying space is arranged in the middle of the conveying pull body; the jig comprises at least two jigs, wherein the jigs are placed in the linear conveying space and supported by synchronous belts at the front side and the rear side of the conveying pull body, and the synchronous belts drive the jigs to move from left to right along the linear conveying space; at least two sets of power supply PCB boards to be welded and power supply DC lines inserted into the power supply PCB boards from bottom to top are placed on the jig; the side part of the conveying pull body is provided with a first welding station and a second welding station; the jig positioning mechanism is arranged at the first welding station and the second welding station, and the jig is positioned left and right at the first welding station and the second welding station through the jig positioning assembly; the pressing mechanism is arranged on the front side of the jig positioning mechanism, and after the jig is positioned and fixed, the pressing mechanism downwards presses the power supply PCB and the power supply DC line on the jig; the welding mechanism is arranged above the conveying pull body in a crossing way and corresponds to the jig positioning mechanism, and the welding mechanism fixes soldering tin at the joint between the power DC line and the power PCB; and after the soldering tin is finished, the jig positioning mechanism releases the jig so as to carry out the next procedure.
Preferably, the jig positioning mechanism comprises a left positioning component and a right positioning component which are arranged in the conveying pull body, and a jig positioning space is formed between the left positioning component and the right positioning component;
the left positioning assembly is fixedly arranged on the frame and comprises a left positioning seat and a positioning block, wherein the left positioning seat is fixedly arranged on the frame, a left mounting groove is formed in the left positioning seat, and the top surface and the right side surface of the left mounting groove are open surfaces; the positioning block is arranged in the rotatable left mounting groove through a left rotating shaft inserted into the front side wall and the rear side wall of the left mounting groove along the front-rear direction, the top surface of the positioning block is a cambered surface extending upwards obliquely to the right, and the right side surface of the positioning block is a vertical plane; a spring is connected between the lower part of the positioning block and the bottom of the left mounting groove; when the jig passes through the left positioning assembly, the bottom surface of the jig props against the cambered surface at the top of the positioning block, and presses down the positioning block, so that the positioning block rotates clockwise around the left rotating shaft, and the spring is compressed; after the jig passes through the left positioning component, the positioning block rotates anticlockwise to the upper part of the jig around the left rotating shaft under the upward rebound force of the spring, so that the right side surface of the positioning block props against the left side end surface of the jig, and the jig is positioned from the left side;
The right positioning assembly comprises a right positioning seat, a positioning wheel and a positioning cylinder, wherein the positioning cylinder is vertically arranged at the lower part of the frame, and the output end of the positioning cylinder is upwards arranged; the right positioning seat is fixedly arranged at the output end of the positioning cylinder, a right mounting groove is formed in the right positioning seat, and the left side surface and the top surface of the right mounting groove are open surfaces; the positioning wheel is rotatably arranged in the right mounting groove through a right rotating shaft inserted into the front side wall and the rear side wall of the right mounting groove along the front-rear direction; the jig passes through the left positioning component, after being detected by the proximity switches arranged on two sides of the left positioning component, the proximity switches send signals to the industrial personal computer, and the industrial personal computer controls the positioning cylinder to drive the right positioning seat to extend upwards to the upper part of the rack, so that the right positioning wheel blocks the jig from the right side so as to be positioned;
preferably, the jig comprises a support plate and at least two sets of fixing components arranged on the support plate, wherein each fixing component is arranged on the support plate at intervals along the left-right direction, and power supply components are respectively arranged so as to weld at least two power supplies at a time; the power supply part comprises a power supply lower shell, a power supply upper shell, a power supply PCB board, a power supply DC line, a wire bundle and a power supply connector.
Preferably, the fixing component comprises a PCB fixing seat, a DC line fixing seat, a power supply lower shell fixing seat, a power supply upper shell fixing seat and a test seat, wherein the power supply lower shell fixing seat, the PCB fixing seat and the DC line fixing seat are sequentially arranged on the support plate from left to right, a power supply lower shell is embedded in the power supply lower shell fixing seat, and a power supply PCB is horizontally embedded in the PCB fixing seat; two wiring holes are formed in the right side of the power supply PCB; the clamping groove arranged in the left-right direction is formed in the DC line fixing frame, the power supply DC line is embedded and fixed in the clamping groove, and a connector at the left end of the power supply DC line penetrates through the clamping groove to extend to the lower side of the wiring hole of the power supply PCB board and is bent upwards to be inserted into the wiring hole, so that the power supply DC line is electrically connected with the power supply PCB board.
Preferably, the power supply upper shell fixing seat and the test seat are respectively arranged at the rear sides of the DC line fixing seat and the power supply lower shell fixing seat; the power supply upper shell is embedded in the power supply upper shell fixing seat; the front side part of the test seat is provided with a slot for inserting a wire harness, the rear side part of the test seat is provided with a conductive jack, both sides of the conductive jack are provided with test connecting holes, and an external test device is electrically connected with the test seat through the test connecting holes; the power connector is vertically inserted into the conductive jack and is electrically connected with the test seat through the conductive jack, and the test seat is connected with the power PCB into the test device through the power connector, the wire bundle and the DC wire so as to perform power-on test on the power PCB.
Preferably, the material pressing mechanism comprises a support, a material pressing cylinder, a connecting block, a material pressing spring, a lifting plate and a material pressing block, wherein the support is vertically arranged in a mounting hole formed in a top plate of the machine frame and extends upwards to the position above the top plate of the machine frame; the support is positioned at the front side of the conveying pull body and is correspondingly arranged between the left positioning component and the right positioning component; the material pressing cylinder is vertically arranged on the front side wall of the support, and the output end of the material pressing cylinder is upwards arranged; the connecting block is connected to the output end of the material pressing cylinder, and the material pressing cylinder drives the connecting block to move up and down; the lifting plate is horizontally connected to the connecting block and extends backwards to the upper part of the jig along the horizontal direction; the lifter plate is U type plate body structure, and its U type opening sets up towards the rear side, and the left and right sides limit of lifter plate's U type opening extends to the tool top respectively, and corresponds the setting with two fixed subassembly on the tool in vertical direction.
Preferably, the pressing blocks comprise a first pressing block and a second pressing block, and the first pressing block and the second pressing block are respectively arranged at the rear ends of the left side edge and the right side edge of the U-shaped opening of the lifting plate; the first pressing block and the second pressing block descend along with the lifting plate so as to respectively press down the power supply components placed on the fixing assembly; the first pressing block and the second pressing block are respectively provided with a void-avoiding groove, the openings of the void-avoiding grooves are arranged towards the rear side, when the material is pressed, the left side and the right side of the void-avoiding grooves of the first pressing block and the second pressing block respectively press the power supply PCB and the power supply DC line, and the void-avoiding grooves are pressed in the vertical direction corresponding to the wiring holes, so that the welding mechanism can weld the power supply PCB and the power supply DC line at the wiring holes; the two pressing springs are vertically arranged at the lower part of the connecting block respectively, and the upper end and the lower end of each pressing spring are connected to the bottom of the connecting block and the top plate of the frame respectively so as to provide buffering force when the connecting block drives the lifting plate to press materials, thereby avoiding crushing a power supply PCB or a power supply DC line; the lower part of the connecting block is also provided with a proximity switch which is arranged on the top plate of the frame, and the induction head of the proximity switch is upwards arranged so as to induce when the connecting block descends, thereby preventing overvoltage.
Preferably, the welding mechanism comprises two sets, wherein the two welding mechanisms are respectively arranged at a first welding station and a second welding station, the welding mechanism arranged at the first welding station is welded at a wiring hole positioned at the front side or the rear side on each fixed component on the jig, and the welding mechanism arranged at the second welding station is welded at a wiring hole positioned at the rear side or the front side on each fixed component on the jig;
the welding mechanism comprises three brackets, wherein the three brackets are arranged at intervals from left to right, and a welding space is formed between two adjacent brackets; the longitudinal driving component is arranged on the bracket; the longitudinal support is slidably arranged on the longitudinal driving assembly along the longitudinal direction and is connected with the output end of the longitudinal driving assembly, and the longitudinal driving assembly drives the longitudinal support to longitudinally and linearly move; the transverse driving component is arranged on the longitudinal support and moves along with the longitudinal support; the transverse support is slidably arranged on the transverse driving assembly and is connected with the output end of the transverse driving assembly, and the transverse driving assembly drives the transverse support to linearly slide along the transverse direction; the lifting driving component is arranged on the transverse support and moves along with the transverse support; the fine adjustment and welding assembly is connected to the output end of the lifting driving assembly, and is driven by the lifting driving assembly to move up and down in the vertical direction so as to descend to the wiring hole; after the angle or the position of the fine tuning component of the fine tuning and welding component is fine tuned, the welding component of the fine tuning and welding component fixes the power supply PCB and the power supply DC line solder at the wiring hole;
The longitudinal driving assembly comprises a longitudinal motor and a longitudinal linear module, wherein the longitudinal motor is arranged at the rear side of the bracket, and the front side of the output end is arranged; the longitudinal linear module is arranged at the front side of the longitudinal motor and is connected with the output end of the longitudinal motor; the longitudinal support is arranged between two adjacent brackets along the left-right direction, and two ends of the longitudinal support are respectively and slidably connected with the brackets and the longitudinal linear modules on the other bracket; a longitudinal screw rod arranged along the front-back direction is arranged in the longitudinal linear module and is connected with the output end of the longitudinal motor; a longitudinal screw rod seat is sleeved on the longitudinal screw rod; one end of the longitudinal support is connected to the longitudinal screw rod seat, and when the longitudinal motor drives the longitudinal screw rod to rotate, the longitudinal screw rod seat drives the longitudinal support to linearly move along the front-back direction;
the transverse driving assembly comprises a transverse motor, a transverse screw rod and a transverse screw rod seat, wherein the transverse motor is arranged at the lower part of the longitudinal support, and an output shaft of the transverse motor is arranged towards the right side; the left end of the transverse screw rod is fixed at the lower part of the longitudinal support through a bearing, and the right end of the transverse screw rod is connected with an output shaft of the transverse motor through a driving wheel and a driving belt; the transverse motor drives the transverse screw rod to rotate; the transverse screw rod seat is sleeved on the transverse screw rod and is in threaded connection with the transverse screw rod, and the upper end of the transverse screw rod seat penetrates through the longitudinal support to be connected to the transverse support; the transverse support is slidably arranged on the longitudinal support through a sliding rail arranged on the longitudinal support, and when the transverse screw rod rotates, the transverse support is driven to linearly slide along the left-right direction through the transverse screw rod seat;
The lifting driving assembly comprises a lifting motor, a lifting screw rod and a lifting screw rod seat, wherein the lifting motor is arranged on the transverse support, and an output shaft is arranged upwards; the lifting screw rod is vertically arranged on the front side of the lifting motor, the lower end of the lifting screw rod is connected to the rear side wall of the transverse support through a bearing, the upper end of the lifting screw rod is connected to the output shaft of the lifting motor through a driving wheel and a driving belt, and the lifting motor drives the lifting screw rod to rotate; the lifting screw rod seat is sleeved on the lifting screw rod and is in threaded connection with the lifting screw rod; the lifting screw rod seat penetrates through the transverse support to extend to the front side of the transverse support and is connected with the fine adjustment and welding assembly; when the lifting screw rod rotates, the lifting screw rod seat drives the fine adjustment and welding assembly to move up and down.
Preferably, the fine adjustment and welding assembly is slidably connected to the front side wall of the longitudinal support through a sliding rail vertically arranged on the front side wall of the longitudinal support; the fine adjustment and welding assembly comprises a fine adjustment component and a welding component, wherein the fine adjustment component is connected with the longitudinal support so as to support and adjust the position or angle of the welding component; the welding component is connected to the fine adjustment component so as to weld;
The fine tuning component comprises a lifting seat and a fine tuning seat, wherein the lifting seat can be slidably connected to the front side wall of the longitudinal support through a sliding rail vertically arranged on the front side wall of the longitudinal support, the rear side of the lifting seat is connected with the lifting screw rod seat, and the lifting screw rod seat drives the lifting seat to move in a lifting manner; the lifting seat is provided with a first arc-shaped groove, the first arc-shaped groove is arranged along the left-right direction, and the middle part of the first arc-shaped groove extends upwards; the rear end of the fine adjustment seat is slidably connected in the first arc-shaped groove, and the fine adjustment seat slides in the first arc-shaped groove so as to adjust the angle or the positions of the left and right directions and the up and down directions in a vertical plane; the fine adjustment seat is provided with a second arc-shaped groove, the second arc-shaped groove is arranged along the front-back direction, and the middle part of the second arc-shaped groove extends rightwards; the welding component is slidably connected in the second arc-shaped groove so as to adjust the angle or adjust the positions of the front, back, left and right directions in the plane of the top surface of the fine adjustment seat.
Preferably, the welding component comprises a connecting seat, a welding driving piece, a welding support, a welding bracket, a welding gun, a tin wire clamping piece and a smoke suction pipe, wherein the connecting seat is slidably connected in the first arc-shaped groove; the welding driving piece is arranged on the connecting seat, and the output end of the welding driving piece is arranged downwards; the welding support is connected to the lower part of the welding driving piece, and the welding driving piece drives the welding support to move up and down; the welding bracket is fixed on the welding support; the welding gun is fixed on the welding support, and the welding support moves along with the welding support and drives the welding gun to descend so as to enable the welding gun to be close to the wiring hole; the welding device comprises a welding bracket, a welding gun, a tin wire clamping piece, a welding rod and a welding rod, wherein the welding rod is arranged at the lower end of the welding rod; the smoke suction pipe is arranged at the side part of the welding bracket, the lower end of the smoke suction pipe extends to the vicinity of the lower end of the welding gun, and the upper end of the smoke suction pipe is connected with a smoke suction device so as to suck smoke generated in the welding process;
The welding driving piece comprises a welding cylinder, a welding sliding rail and a welding push rod, wherein the welding cylinder is fixedly arranged on the front side wall of the connecting seat, and the output end of the welding cylinder is downwards arranged; the welding slide rail is arranged on the front side wall of the connecting seat along the vertical direction, and the welding support is embedded on the welding slide rail in a sliding manner; the upper end of the welding push rod is connected to the output end of the welding cylinder, the lower end of the welding push rod is connected to the welding support, and the welding push rod is sleeved with a buffer spring; the welding cylinder pushes the welding support to move up and down through the welding push rod, and the welding support is buffered through the buffer spring;
the tin wire clamping piece comprises a clamping seat, a rotating seat, a connecting rod, a tin wire connecting seat, a connecting plate and a tin wire sleeve, wherein the clamping seat is fixedly arranged on one side of the welding bracket, and an installation space is formed in the middle of the clamping seat; the rotating seat is rotatably arranged in the mounting space of the clamping seat through the rotating shaft, a spring is connected between the right side of the rotating seat and the inner side wall of the rotating seat, and a screw rod connected to the right side wall of the clamping seat is screwed in or screwed out of the rotating seat to adjust the mounting angle of the rotating seat in the clamping seat; the upper end of the connecting rod is fixedly connected below the rotating seat, and the lower end of the connecting rod is connected with a tin wire connecting seat; the upper end of the connecting plate is rotatably connected to the tin wire connecting seat so as to adjust the installation angle, and after the angle is adjusted, the connecting plate is fixed with the tin wire connecting seat through a screw; at least two connecting holes are uniformly arranged at intervals at the lower end of the connecting plate; the tin wire sleeve is rotatably connected in the connecting hole so as to adjust the installation angle, and the installation height is adjusted by connecting different connecting holes; the tin wire sleeve is fixedly inserted with a tin wire, and the lower end of the tin wire extends downwards to the lower end of the welding gun in an inclined mode so as to be welded.
The invention has the beneficial effects that:
the invention aims at the defects or innovations existing in the prior art, and designs an automatic welding machine for the power supply DC line, which realizes the automatic transmission and the effective welding connection of the PCB and the DC line through the mutual cooperation of the transmission pull body and the jig positioning mechanism, realizes the accurate welding and the automatic smoke discharge through the welding mechanism with the flexible fine adjustment function through the effective clamping of the PCB and the DC line, and has high welding efficiency; the invention belongs to one station of an autonomously developed automatic power supply assembly production line, and the whole automatic power supply assembly production line comprises the working procedures of DC line welding, welding spot cleaning, automatic PCB (printed circuit board) mounting, dispensing cover lower cover, power-on test, ultrasonic welding, comprehensive test, packaging and the like; the invention mainly realizes the automatic welding procedure of the power DC line; according to the invention, 2 power supply DC lines can be welded at one time through the double-unit design of the jig and the welding mechanism, compared with the traditional manual spot welding, the productivity is only 200PCS/h for 5 persons/time, and the yield is only about 70%; the automatic welding of the power supply DC line only needs 1 person/time, the welding productivity can reach 1200PCS/h, and the yield is as high as more than 90%. Specifically, the invention has the following characteristics:
1. The invention designs a power supply jig as a PCB and a power supply DC line bearing component, wherein two sets of fixing components are arranged on a single jig so as to clamp and fix two sets of power supply components (a power supply lower shell, a power supply upper shell, a power supply PCB, a power supply DC line, a wire bundle and a power supply connector), a power supply lower shell fixing seat and a power supply upper shell fixing seat on the jig respectively fix an opening of the power supply upper shell and an opening of the power supply lower shell upwards and downwards, so that when a lower cover is covered in a later period, the upper cover is directly covered by a cover lower cover device on the premise that the upper cover does not need to be turned; one side of the power supply lower shell fixing seat and the power supply lower shell fixing seat on the jig is provided with a PCB fixing seat so that the PCB fixing seat is horizontally fixed, one side of a wiring hole of the PCB is provided with a DC line fixing frame, the DC line fixing frame adopts a buckle type structural design, a clamping groove arranged along the left-right direction is formed in the DC line fixing frame, a power supply DC line is embedded and fixed in the clamping groove, a connector at the left end of the power supply DC line penetrates through the clamping groove to extend to the lower side of the wiring hole of the power supply PCB, and the connector is upwards bent and inserted into the wiring hole so that the power supply DC line is electrically connected with the power supply PCB.
2. The invention designs a conveying pull body as a jig conveying carrier, a jig is placed on a synchronous belt of the conveying pull body and is driven to move by the synchronous belt, a plurality of welding stations are arranged on the conveying pull body, a left positioning component and a right positioning component are respectively arranged at each welding station, a jig stopping space is arranged between the left positioning component and the right positioning component, a left positioning block adopted by the left positioning component is rotatably connected to a left positioning seat, and the function of automatically placing the jig can be realized by timely bouncing the jig after the jig passes through the left positioning seat through a spring connected between the left positioning block and the right positioning seat; the right positioning is performed in a cylinder driving mode, after the jig passes through the left positioning assembly, the positioning cylinder drives the right positioning seat to drive the positioning wheel to rise to the upper part of the right side of the jig, and the jig is stopped from the right side by the right positioning wheel; in addition, the invention is provided with a pressing component at the outer side of the welding station, and the invention is provided with a lifting plate with a U-shaped plate structure for simultaneously transmitting two sets of power supply components according to the characteristics of the jig.
3. The invention is provided with two welding mechanisms which are respectively arranged on the welding stations of the conveying pull body in a crossing way, and each welding mechanism comprises two independent welding units, so that the single simultaneous soldering action on the wiring holes of two PCB boards on the jig is realized; one of the two welding mechanisms is used for welding a DC line at a wiring hole at the front side of the PCB, and the other welding mechanism is used for welding a DC line at a wiring hole at the rear side of the PCB; the welding mechanism is independently designed with a longitudinal driving component, a transverse driving component and a lifting driving component, so that the driving of the fine adjustment and welding component in a horizontal plane and the driving of the fine adjustment and welding component in a vertical direction are realized, and the fine adjustment and the welding component can be conveniently moved to a welding station; particularly, a fine tuning component is arranged between the welding component and the lifting driving component for improving welding accuracy, the structural design of the fine tuning component is simple, the fine tuning component only comprises a lifting seat and a fine tuning seat, the lifting seat can be slidably connected to the front side wall of the longitudinal support through a sliding rail vertically arranged on the front side wall of the longitudinal support, the rear side of the lifting seat is connected with the lifting screw rod seat, and the lifting screw rod seat drives the lifting seat to move in a lifting manner; the fine adjustment seat is slidably connected in the first arc-shaped groove, and the position adjustment in the left-right direction and the vertical direction can be realized by sliding along the first arc-shaped groove; meanwhile, the second arc-shaped groove is arranged on the adjusting seat, the second arc-shaped groove extends along the front-rear direction, the middle part of the second arc-shaped groove protrudes rightwards, when the welding part connected in the second arc-shaped groove slides along the second arc-shaped groove, the positions in the front-rear direction and the left-right direction can be adjusted, and meanwhile, when the first arc-shaped groove and the second arc-shaped groove synchronously cooperate, the angle of the welding part in the three-dimensional space can be integrally adjusted; through the extremely simple design, the position or angle adjustment of the welding part in the plane and the space is realized; and the welding precision is effectively ensured.
4. The welding device is designed with a welding part, the welding part has the function of simultaneously realizing clamping and fixing of the welding gun and the tin wire, but is different from the traditional welding device in that based on the characteristic that the area of the junction of the wiring hole and the DC wire is small, the welding device is independently integrated with a welding driving part in the welding part, the welding driving part is used for independently driving the welding gun and the tin wire to be close to the junction of the DC wire and the wiring hole, so that the welding precision is ensured, a buffer spring is integrated in the welding driving part, and the buffer spring is used for providing welding buffer force, so that the situation that the PCB is damaged due to overlarge pressure on the PCB during welding is effectively prevented; the welding part is used as a welding gun and a welding wire fixing bearing part through a welding bracket with a disc-shaped structure, the welding bracket is connected with the output end of the welding driving part, and the welding gun is fixed at the lower part of the welding bracket; in particular, the tin wire is fixed on one side of the welding bracket through the tin wire clamping piece, and the rotating seat of the tin wire clamping piece rotates in the clamping seat, the installation angle between the tin wire and the welding gun can be independently adjusted, so that the lower end of the tin wire is effectively aligned with the lower part of the welding gun; meanwhile, the tin wire sleeve for fixing the tin wire is connected to the rotating seat through the connecting plate, the tin wire connecting seat and the connecting rod, the upper end of the connecting plate is rotatably connected with the tin wire connecting seat, the tin wire sleeve is rotatably connected with the lower end of the connecting plate, the angle adjustment of the tin wire can be flexibly realized, a plurality of connecting holes are arranged on the connecting plate at vertical intervals, and the installation height of the tin wire can be adjusted by installing the tin wire sleeve in different connecting holes.
5. The invention is characterized in that one side of the welding bracket is also connected with a smoke suction pipe, the upper end of the smoke suction pipe is connected to the welding bracket through a connecting plate, the lower end of the smoke suction pipe extends to one side of the lower ends of the welding gun and the tin wire, and when soldering tin, the smoke suction pipe sucks the generated smoke upwards to finish the automatic smoking action.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of a component of the present invention.
FIG. 3 is a second perspective view of the components of the present invention.
Fig. 4 is an enlarged schematic view of the structure of fig. 3 at a.
Fig. 5 is a schematic perspective view of the fixture in fig. 1.
Fig. 6 is a schematic perspective view of the pressing mechanism in fig. 1.
Fig. 7 is a schematic perspective view of the welding mechanism of fig. 1.
FIG. 8 is a second perspective view of the welding mechanism of FIG. 1.
Fig. 9 is an enlarged schematic view of the structure at B in fig. 8.
Fig. 10 is a schematic perspective view of the trimming and welding assembly of fig. 7.
Fig. 11 is a schematic perspective view of the welded component of fig. 10.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1 to 11, the technical scheme adopted by the invention is as follows: the utility model provides a power DC line automatic welder, includes that conveying draws body 2, tool 3, tool positioning mechanism, swager mechanism 4 and welding mechanism 5, wherein, above-mentioned conveying draws body 2 to set up on frame 1 along the left and right directions, and the middle part that conveys and draws body 2 is equipped with sharp conveying space; the jig 3 comprises at least two jigs, the jigs 3 are placed in the linear conveying space and supported by synchronous belts at the front side and the rear side of the conveying pull body 2, and the synchronous belts drive the jigs 3 to move from left to right along the linear conveying space; at least two sets of power supply PCB boards 03 to be welded and power supply DC wires 05 which are inserted into the power supply PCB boards 03 from bottom to top are arranged on the jig 3; the side part of the conveying pull body 2 is provided with a first welding station and a second welding station; the jig positioning mechanism is arranged at the first welding station and the second welding station, and the jig 3 is positioned left and right at the first welding station and the second welding station through the jig positioning assembly; the pressing mechanism 4 is arranged at the front side of the jig positioning mechanism, and after the jig 3 is positioned and fixed, the pressing mechanism 4 downwards presses the power supply PCB 03 and the power supply DC line 05 on the jig 3; the welding mechanism 5 is arranged above the conveying pull body 2 in a crossing way and corresponds to the jig positioning mechanism, and the welding mechanism 5 fixes soldering tin at the joint between the power DC line 05 and the power PCB 03; after the soldering tin is finished, the jig positioning mechanism releases the jig 3 so as to carry out the next procedure.
The jig positioning mechanism comprises a left positioning component 6 and a right positioning component 7 which are arranged in the conveying pull body 2, and a jig positioning space is formed between the left positioning component 6 and the right positioning component 7;
the left positioning assembly 6 is fixedly arranged on the frame 1, and comprises a left positioning seat and a positioning block, wherein the left positioning seat is fixedly arranged on the frame 1, a left mounting groove is formed in the left positioning seat, and the top surface and the right side surface of the left mounting groove are open surfaces; the positioning block is arranged in the rotatable left mounting groove through a left rotating shaft inserted into the front side wall and the rear side wall of the left mounting groove along the front-rear direction, the top surface of the positioning block is a cambered surface extending upwards obliquely to the right, and the right side surface of the positioning block is a vertical plane; a spring is connected between the lower part of the positioning block and the bottom of the left mounting groove; when the jig 3 passes through the left positioning component 6, the bottom surface of the jig 3 butts against the cambered surface at the top of the positioning block, and presses down the positioning block to enable the positioning block to rotate clockwise around the left rotating shaft, and the spring is compressed; after the jig 3 passes through the left positioning component 6, the positioning block rotates anticlockwise to the upper part of the jig 3 around the left rotating shaft under the upward rebound force of the spring, so that the right side surface of the positioning block props against the left side end surface of the jig 3, and the jig 3 is positioned from the left side;
The right positioning assembly 7 comprises a right positioning seat, a positioning wheel and a positioning cylinder, wherein the positioning cylinder is vertically arranged at the lower part of the frame 1, and the output end of the positioning cylinder is upwards arranged; the right positioning seat is fixedly arranged at the output end of the positioning cylinder, a right mounting groove is formed in the right positioning seat, and the left side surface and the top surface of the right mounting groove are open surfaces; the positioning wheel is rotatably arranged in the right mounting groove through a right rotating shaft inserted into the front side wall and the rear side wall of the right mounting groove along the front-rear direction; the jig 3 passes through left locating component 6, and after proximity switch that sets up in left locating component 6 both sides detected, proximity switch sent signal to industrial computer, and industrial computer control positioning cylinder drive right locating seat upwards stretches out to frame 1 top, makes right locating wheel stop jig 3 from the right side to the location.
The jig 3 comprises a support plate 31 and at least two sets of fixing components arranged on the support plate 31, wherein each fixing component is arranged on the support plate 31 at intervals along the left-right direction and is respectively provided with a power supply component so as to weld at least two power supplies at one time; the power supply part comprises a power supply lower shell 01, a power supply upper shell 02, a power supply PCB 03, a power supply DC line 05, a wire harness 06 and a power supply connector 07.
The fixing assembly comprises a PCB fixing seat 32, a DC line fixing frame 33, a power supply lower shell fixing seat 34, a power supply upper shell fixing seat 35 and a test seat 36, wherein the power supply lower shell fixing seat 34, the PCB fixing seat 32 and the DC line fixing frame 33 are sequentially arranged on the support plate 31 from left to right, a power supply lower shell 01 is embedded in the power supply lower shell fixing seat 34, and a power supply PCB 03 is horizontally embedded in the PCB fixing seat 32; two wiring holes 04 are formed in the right side of the power supply PCB 03; the DC line fixing frame 33 is provided with a clamping groove arranged in the left-right direction, the power DC line 05 is embedded and fixed in the clamping groove, and a connector at the left end of the power DC line 05 passes through the clamping groove to extend to the lower side of the wiring hole 04 of the power PCB board 03, and is bent upwards to be inserted into the wiring hole 04, so that the power DC line 05 is electrically connected with the power PCB board 03.
The power supply upper shell fixing seat 35 and the test seat 36 are respectively arranged at the rear sides of the DC line fixing seat 33 and the power supply lower shell fixing seat 34; the power supply upper shell 02 is embedded in the power supply upper shell fixing seat 35; the front side of the test seat 36 is provided with a slot for inserting a wire harness 06, the rear side of the test seat 36 is provided with a conductive jack, both sides of the conductive jack are provided with test connection holes, and an external test device is electrically connected with the test seat 36 through the test connection holes; the power connector 07 is vertically inserted into the conductive jack and is electrically connected with the test seat 36 through the conductive jack, and the test seat 36 connects the power PCB 03 into the test device through the power connector 07, the wire harness 06 and the DC wire 05 so as to perform power-on test on the power PCB 03.
The material pressing mechanism 4 comprises a support 41, a material pressing cylinder 42, a connecting block 43, a material pressing spring 44, a lifting plate 45 and a material pressing block, wherein the support 41 is vertically arranged in a mounting hole formed in the top plate of the frame 1 and extends upwards above the top plate of the frame 1; the support 41 is positioned at the front side of the conveying pull body 2 and correspondingly arranged between the left positioning component 6 and the right positioning component 7; the pressing cylinder 42 is vertically arranged on the front side wall of the support 41, and the output end of the pressing cylinder 42 is upward; the connecting block 43 is connected to the output end of the pressing cylinder 42, and the pressing cylinder 42 drives the connecting block 43 to move up and down; the lifting plate 45 is horizontally connected to the connecting block 43 and extends backward to the upper part of the jig 3 along the horizontal direction; the lifting plate 45 is of a U-shaped plate body structure, a U-shaped opening of the lifting plate 45 is arranged towards the rear side, and the left side edge and the right side edge of the U-shaped opening of the lifting plate 45 extend to the upper portion of the jig 3 respectively and are correspondingly arranged with two fixing components on the jig 3 in the vertical direction.
The pressing blocks comprise a first pressing block 46 and a second pressing block 47, and the first pressing block 46 and the second pressing block 47 are respectively arranged at the rear ends of the left side edge and the right side edge of the U-shaped opening of the lifting plate 45; the first presser 46 and the second presser 47 descend along with the lifter plate 45 to respectively press down the power supply components placed on the fixed assembly; the first pressing block 46 and the second pressing block 47 are respectively provided with a void-avoiding groove, the openings of the void-avoiding grooves are arranged towards the rear side, when the material is pressed, the left side and the right side parts of the void-avoiding grooves of the first pressing block 46 and the second pressing block 47 respectively press the power supply PCB 03 and the power supply DC line 05, and the void-avoiding grooves are pressed in the vertical direction corresponding to the wiring holes 04, so that the welding mechanism 5 welds the power supply PCB 03 and the power supply DC line 05 at the wiring holes 04; the two pressing springs 44 are vertically arranged at the lower part of the connecting block 43, and the upper and lower ends of the pressing springs 44 are respectively connected to the bottom of the connecting block 43 and the top plate of the frame 1, so that a buffer force is provided when the connecting block 43 drives the lifting plate 45 to press the material, and the power supply PCB 03 or the power supply DC line 05 is prevented from being crushed; the lower part of the connecting block 43 is also provided with a proximity switch 48, the proximity switch 48 is arranged on the top plate of the frame 1, and the sensing head is upward arranged so as to sense when the connecting block 43 descends, thereby preventing overvoltage.
The welding mechanism 5 comprises two sets, wherein the two welding mechanisms 5 are respectively arranged at a first welding station and a second welding station, the welding mechanism 5 arranged at the first welding station is welded at a wiring hole 04 positioned at the front side or the rear side on each fixed component on the jig 3, and the welding mechanism 5 arranged at the second welding station is welded at the wiring hole 04 positioned at the rear side or the front side on each fixed component on the jig 3;
the welding mechanism 5 comprises three brackets 51, a longitudinal driving assembly, a longitudinal support, a transverse driving assembly 54, a transverse support 55, a lifting driving assembly 56 and a fine adjustment and welding assembly 58, wherein the brackets 51 are longitudinally arranged above a first welding station and a second welding station in a crossing manner, the three brackets 51 are arranged at intervals from left to right, and a welding space is formed between every two adjacent brackets 51; the longitudinal driving assembly is arranged on the bracket 51; the longitudinal support is slidably arranged on the longitudinal driving assembly along the longitudinal direction and is connected with the output end of the longitudinal driving assembly, and the longitudinal driving assembly drives the longitudinal support to longitudinally and linearly move; the transverse driving assembly 54 is arranged on the longitudinal support and moves along with the longitudinal support; the transverse support 55 is slidably disposed on the transverse driving assembly 54 and connected to an output end of the transverse driving assembly 54, and the transverse driving assembly 54 drives the transverse support 55 to linearly slide along a transverse direction; the lifting driving component 56 is arranged on the transverse support 55 and moves along with the transverse support 55; the fine adjustment and welding assembly 58 is connected to the output end of the lifting driving assembly 56, and is driven by the lifting driving assembly 56 to move up and down in the vertical direction so as to descend to the wire connection hole 04; after the angle or the position of the fine tuning component of the fine tuning and welding component 58 is fine tuned, the welding component of the fine tuning and welding component 58 fixes the power supply PCB 03 and the power supply DC line 05 at the wiring hole 04 by soldering tin;
The longitudinal driving assembly comprises a longitudinal motor 52 and a longitudinal linear module 53, wherein the longitudinal motor 52 is arranged at the rear side of the bracket 51, and the front side of the output end is arranged; the longitudinal linear module 53 is disposed at the front side of the longitudinal motor 52 and connected to the output end of the longitudinal motor 52; the longitudinal support is arranged between two adjacent brackets 51 along the left-right direction, and two ends of the longitudinal support are respectively connected with the brackets 51 and a longitudinal linear module 53 on the other bracket 51 in a sliding manner; a longitudinal screw rod arranged along the front-back direction is arranged in the longitudinal linear module 53 and is connected with the output end of the longitudinal motor 52; a longitudinal screw rod seat is sleeved on the longitudinal screw rod; one end of the longitudinal support is connected to a longitudinal screw rod seat, and when the longitudinal motor 52 drives the longitudinal screw rod to rotate, the longitudinal screw rod seat drives the longitudinal support to linearly move along the front-back direction;
the transverse driving assembly 54 includes a transverse motor 541, a transverse screw 542, and a transverse screw seat 543, wherein the transverse motor 541 is disposed at a lower portion of the longitudinal support, and an output shaft of the transverse motor 541 is disposed toward a right side; the transverse screw rod 542 is arranged at the front side of the transverse motor 541 along the left-right direction, the left end of the transverse screw rod 542 is fixed at the lower part of the longitudinal support through a bearing, and the right end of the transverse screw rod 542 is connected with the output shaft of the transverse motor 541 through a driving wheel and a driving belt; the transverse motor 541 drives the transverse screw 542 to rotate; the transverse screw rod seat 543 is sleeved on the transverse screw rod 542 and is in threaded connection with the transverse screw rod 542, and the upper end of the transverse screw rod seat 543 penetrates through the longitudinal support and is connected to the transverse support 55; the transverse support 55 is slidably disposed on the longitudinal support through a sliding rail disposed on the longitudinal support, and when the transverse screw 542 rotates, the transverse support 55 is driven to linearly slide in the left-right direction through the transverse screw seat 543;
The lifting driving assembly 56 comprises a lifting motor 561, a lifting screw 562 and a lifting screw seat, wherein the lifting motor 561 is arranged on the transverse support 55, and an output shaft is upwards arranged; the lifting screw rod 562 is vertically arranged at the front side of the lifting motor 561, the lower end of the lifting screw rod 562 is connected to the rear side wall of the transverse support 55 through a bearing, the upper end of the lifting screw rod 562 is connected to the output shaft of the lifting motor 561 through a driving wheel and a driving belt, and the lifting motor 561 drives the lifting screw rod 562 to rotate; the lifting screw rod seat is sleeved on the lifting screw rod 562 and is in threaded connection with the lifting screw rod 562; the lifting screw rod seat passes through the transverse support 55 to extend to the front side of the transverse support 55 and is connected with a fine adjustment and welding assembly 58; when the lifting screw 562 rotates, the lifting screw seat drives the fine adjustment and welding assembly 58 to move up and down.
The fine tuning and welding assembly 58 is slidably connected to the front side wall of the longitudinal support 55 by a slide rail vertically disposed on the front side wall of the longitudinal support 55; the trim and weld assembly 58 includes trim components and weld components, wherein the trim components are coupled to the longitudinal support 55 to support and adjust the position or angle of the weld components; the welding component is connected to the fine adjustment component so as to weld;
The fine tuning component comprises a lifting seat 581 and a fine tuning seat 583, wherein the lifting seat 581 can be slidably connected to the front side wall of the longitudinal support 55 through a sliding rail vertically arranged on the front side wall of the longitudinal support 55, the rear side of the lifting seat 581 is connected with the lifting screw rod seat, and the lifting screw rod seat drives the lifting seat 581 to move in a lifting manner; the lifting seat 581 is provided with a first arc-shaped groove 582, the first arc-shaped groove 582 is arranged along the left-right direction, and the middle part of the first arc-shaped groove 582 extends upwards; the rear end of the fine adjustment seat 583 is slidably connected to the first arc-shaped groove 582, and the fine adjustment seat 583 slides in the first arc-shaped groove 582 to adjust the angle or adjust the position in the left-right and up-down directions in the vertical plane; the fine adjustment seat 583 is provided with a second arc groove 584, the second arc groove 584 is arranged along the front-back direction, and the middle part extends rightward; the welding member is slidably coupled to the second arc groove 584 so as to adjust an angle in a plane where the top surface of the fine adjustment seat 583 is located or adjust a position in front-rear and left-right directions.
The welding component comprises a connecting seat 585, a welding driving piece, a welding support 589, a welding bracket 5810, a welding gun 5811, a tin wire clamping piece and a smoking pipe 5818, wherein the connecting seat 585 is slidably connected in the first arc-shaped groove 582; the welding driving piece is arranged on the connecting seat 585, and the output end of the welding driving piece is arranged downwards; the welding support 589 is connected to the lower part of the welding driving member, and the welding driving member drives the welding support 589 to move up and down; the welding bracket 5810 is fixed to a welding holder 589; the welding gun 5811 is fixed to the welding holder 5810, and the welding holder 5810 moves along with the welding holder 589 and drives the welding gun 5811 to descend so as to bring the welding gun 5811 close to the wire connection hole 04; the tin wire clamping member is disposed at a side portion of the welding bracket 5810, and a lower end of the tin wire clamping member clamps and fixes a tin wire, and aligns the lower end of the tin wire to a lower end of the welding gun 5811 for welding; the smoking pipe 5818 is disposed at a side of the welding bracket 5810, and a lower end of the smoking pipe 5818 extends to a vicinity of a lower end of the welding gun 5811, and a smoking device is connected to an upper end of the smoking pipe 5818 to suck smoke generated during welding;
The welding driving member includes a welding cylinder 586, a welding slide rail 587, and a welding push rod 588, wherein the welding cylinder 586 is fixedly disposed on a front side wall of the connecting seat 585, and an output end of the welding cylinder 586 is disposed downward; the welding slide rail 587 is vertically disposed on the front sidewall of the connecting seat 585, and the welding support 589 is slidably embedded in the welding slide rail 587; the upper end of the welding push rod 588 is connected to the output end of the welding cylinder 586, the lower end is connected to the welding support 589, and the welding push rod 588 is sleeved with a buffer spring; the welding cylinder 586 pushes the welding support 589 to move up and down through the welding push rod 588 and is buffered through a buffer spring;
the solder wire holder includes a holder 5812, a rotary holder 5813, a connecting rod 5814, a solder wire connection holder 5815, a connecting plate 5816, and a solder wire sleeve 5817, wherein the holder 5812 is fixedly disposed on one side of a solder mount 5810, and an installation space is provided in the middle of the holder 5812; the rotating base 5813 is rotatably disposed in the installation space of the clamping base 5812 through a rotating shaft, a spring is connected between the right side of the rotating base 5813 and the inner side wall of the rotating base 5813, and a screw connected to the right side wall of the clamping base 5812 is screwed into or out of the rotating base 5813 to adjust the installation angle of the rotating base 5813 in the clamping base 5812; the upper end of the connecting rod 5814 is fixedly connected to the lower part of the rotating base 5813, and the lower end of the connecting rod 5814 is connected with a tin wire connecting base 5815; the upper end of the connecting plate 5816 is rotatably connected to the tin wire connecting seat 5815, so as to adjust the installation angle, and after the angle is adjusted, the connecting plate is fixed with the tin wire connecting seat 5815 by a screw; at least two connection holes are uniformly spaced at the lower end of the connection plate 5816; the tin wire sleeve 5817 is rotatably connected to the inside of the connection hole to adjust the installation angle, and to adjust the installation height by connecting different connection holes; the wire sleeve 5817 is fixedly inserted with a wire, and the lower end of the wire is inclined to extend downward to the lower end of the welding gun 5811 for welding.
Furthermore, the invention designs an automatic welding machine for the power supply DC line, which realizes the automatic transmission and the effective welding connection of the PCB and the DC line through the mutual cooperation of the transmission pull body and the jig positioning mechanism, realizes the accurate welding and the automatic smoke discharge through the welding mechanism with the flexible fine adjustment function through the effective clamping of the PCB and the DC line, and has high welding efficiency; the invention belongs to one station of an autonomously developed automatic power supply assembly production line, and the whole automatic power supply assembly production line comprises the working procedures of DC line welding, welding spot cleaning, automatic PCB (printed circuit board) mounting, dispensing cover lower cover, power-on test, ultrasonic welding, comprehensive test, packaging and the like; the invention mainly realizes the automatic welding procedure of the power DC line; according to the invention, 2 power supply DC lines can be welded at one time through the double-unit design of the jig and the welding mechanism, compared with the traditional manual spot welding, the productivity is only 200PCS/h for 5 persons/time, and the yield is only about 70%; the automatic welding of the power supply DC line only needs 1 person/time, the welding productivity can reach 1200PCS/h, and the yield is as high as more than 90%. Specifically, the invention has the following characteristics: 1. the invention designs a power supply jig as a PCB and a power supply DC line bearing component, wherein two sets of fixing components are arranged on a single jig so as to clamp and fix two sets of power supply components (a power supply lower shell, a power supply upper shell, a power supply PCB, a power supply DC line, a wire bundle and a power supply connector), a power supply lower shell fixing seat and a power supply upper shell fixing seat on the jig respectively fix an opening of the power supply upper shell and an opening of the power supply lower shell upwards and downwards, so that when a lower cover is covered in a later period, the upper cover is directly covered by a cover lower cover device on the premise that the upper cover does not need to be turned; one side of the power supply lower shell fixing seat and the power supply lower shell fixing seat on the jig is provided with a PCB fixing seat so that the PCB fixing seat is horizontally fixed, one side of a wiring hole of the PCB is provided with a DC line fixing frame, the DC line fixing frame adopts a buckle type structural design, a clamping groove arranged along the left-right direction is formed in the DC line fixing frame, a power supply DC line is embedded and fixed in the clamping groove, a connector at the left end of the power supply DC line penetrates through the clamping groove to extend to the lower side of the wiring hole of the power supply PCB, and the connector is upwards bent and inserted into the wiring hole so that the power supply DC line is electrically connected with the power supply PCB. 2. The invention designs a conveying pull body as a jig conveying carrier, a jig is placed on a synchronous belt of the conveying pull body and is driven to move by the synchronous belt, a plurality of welding stations are arranged on the conveying pull body, a left positioning component and a right positioning component are respectively arranged at each welding station, a jig stopping space is arranged between the left positioning component and the right positioning component, a left positioning block adopted by the left positioning component is rotatably connected to a left positioning seat, and the function of automatically placing the jig can be realized by timely bouncing the jig after the jig passes through the left positioning seat through a spring connected between the left positioning block and the right positioning seat; the right positioning is performed in a cylinder driving mode, after the jig passes through the left positioning assembly, the positioning cylinder drives the right positioning seat to drive the positioning wheel to rise to the upper part of the right side of the jig, and the jig is stopped from the right side by the right positioning wheel; in addition, the invention is provided with a pressing component at the outer side of the welding station, and the invention is provided with a lifting plate with a U-shaped plate structure for simultaneously transmitting two sets of power supply components according to the characteristics of the jig. 3. The invention is provided with two welding mechanisms which are respectively arranged on the welding stations of the conveying pull body in a crossing way, and each welding mechanism comprises two independent welding units, so that the single simultaneous soldering action on the wiring holes of two PCB boards on the jig is realized; one of the two welding mechanisms is used for welding a DC line at a wiring hole at the front side of the PCB, and the other welding mechanism is used for welding a DC line at a wiring hole at the rear side of the PCB; the welding mechanism is independently designed with a longitudinal driving component, a transverse driving component and a lifting driving component, so that the driving of the fine adjustment and welding component in a horizontal plane and the driving of the fine adjustment and welding component in a vertical direction are realized, and the fine adjustment and the welding component can be conveniently moved to a welding station; particularly, a fine tuning component is arranged between the welding component and the lifting driving component for improving welding accuracy, the structural design of the fine tuning component is simple, the fine tuning component only comprises a lifting seat and a fine tuning seat, the lifting seat can be slidably connected to the front side wall of the longitudinal support through a sliding rail vertically arranged on the front side wall of the longitudinal support, the rear side of the lifting seat is connected with the lifting screw rod seat, and the lifting screw rod seat drives the lifting seat to move in a lifting manner; the fine adjustment seat is slidably connected in the first arc-shaped groove, and the position adjustment in the left-right direction and the vertical direction can be realized by sliding along the first arc-shaped groove; meanwhile, the second arc-shaped groove is arranged on the adjusting seat, the second arc-shaped groove extends along the front-rear direction, the middle part of the second arc-shaped groove protrudes rightwards, when the welding part connected in the second arc-shaped groove slides along the second arc-shaped groove, the positions in the front-rear direction and the left-right direction can be adjusted, and meanwhile, when the first arc-shaped groove and the second arc-shaped groove synchronously cooperate, the angle of the welding part in the three-dimensional space can be integrally adjusted; through the extremely simple design, the position or angle adjustment of the welding part in the plane and the space is realized; and the welding precision is effectively ensured. 4. The welding device is designed with a welding part, the welding part has the function of simultaneously realizing clamping and fixing of the welding gun and the tin wire, but is different from the traditional welding device in that based on the characteristic that the area of the junction of the wiring hole and the DC wire is small, the welding device is independently integrated with a welding driving part in the welding part, the welding driving part is used for independently driving the welding gun and the tin wire to be close to the junction of the DC wire and the wiring hole, so that the welding precision is ensured, a buffer spring is integrated in the welding driving part, and the buffer spring is used for providing welding buffer force, so that the situation that the PCB is damaged due to overlarge pressure on the PCB during welding is effectively prevented; the welding part is used as a welding gun and a welding wire fixing bearing part through a welding bracket with a disc-shaped structure, the welding bracket is connected with the output end of the welding driving part, and the welding gun is fixed at the lower part of the welding bracket; in particular, the tin wire is fixed on one side of the welding bracket through the tin wire clamping piece, and the rotating seat of the tin wire clamping piece rotates in the clamping seat, the installation angle between the tin wire and the welding gun can be independently adjusted, so that the lower end of the tin wire is effectively aligned with the lower part of the welding gun; meanwhile, the tin wire sleeve for fixing the tin wire is connected to the rotating seat through the connecting plate, the tin wire connecting seat and the connecting rod, the upper end of the connecting plate is rotatably connected with the tin wire connecting seat, the tin wire sleeve is rotatably connected with the lower end of the connecting plate, the angle adjustment of the tin wire can be flexibly realized, a plurality of connecting holes are arranged on the connecting plate at vertical intervals, and the installation height of the tin wire can be adjusted by installing the tin wire sleeve in different connecting holes. 5. The invention is characterized in that one side of the welding bracket is also connected with a smoke suction pipe, the upper end of the smoke suction pipe is connected to the welding bracket through a connecting plate, the lower end of the smoke suction pipe extends to one side of the lower ends of the welding gun and the tin wire, and when soldering tin, the smoke suction pipe sucks the generated smoke upwards to finish the automatic smoking action.
The examples of the present invention are presented only to describe specific embodiments thereof and are not intended to limit the scope of the invention. Certain modifications may be made by those skilled in the art in light of the teachings of this embodiment, and all equivalent changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (6)

1. An automatic welding machine for a power supply DC line, which is characterized in that: the device comprises a conveying pull body (2), a jig (3), a jig positioning mechanism, a pressing mechanism (4) and a welding mechanism (5), wherein the conveying pull body (2) is arranged on a frame (1) along the left-right direction, and a linear conveying space is arranged in the middle of the conveying pull body (2); the jig (3) comprises at least two jigs, the jigs (3) are placed in the linear conveying space and supported by synchronous belts at the front side and the rear side of the conveying pull body (2), and the synchronous belts drive the jigs (3) to move from left to right along the linear conveying space; at least two sets of power supply DC lines (05) which are inserted into the power supply PCB (03) from bottom to top and are to be welded are arranged on the jig (3); the side part of the conveying pull body (2) is provided with a first welding station and a second welding station; the jig positioning mechanism is arranged at the first welding station and the second welding station, and the jig (3) is positioned left and right at the first welding station and the second welding station through the jig positioning assembly; the pressing mechanism (4) is arranged at the front side of the jig positioning mechanism, and after the jig (3) is positioned and fixed, the pressing mechanism (4) downwards presses the power supply PCB (03) and the power supply DC line (05) on the jig (3); the welding mechanism (5) is transversely arranged above the conveying pull body (2) and corresponds to the jig positioning mechanism, and the welding mechanism (5) fixes soldering tin at the joint between the power DC line (05) and the power PCB (03); after soldering tin is finished, the jig positioning mechanism loosens the jig (3) so as to carry out the next procedure;
The jig (3) comprises at least two groups of fixing components;
the fixing assembly comprises a PCB fixing seat (32) and a DC line fixing frame (33) which are arranged at intervals from left to right;
a power supply PCB (03) is horizontally embedded on the PCB fixing seat (32); two wiring holes (04) are formed in the right side of the power supply PCB (03);
the DC line fixing frame (33) is provided with a clamping groove arranged along the left-right direction, a power supply DC line (05) is embedded and fixed in the clamping groove, a connector at the left end of the power supply DC line (05) penetrates through the clamping groove to extend to the lower part of a wiring hole (04) of the power supply PCB (03), and the connector is bent upwards to be inserted into the wiring hole (04) so that the power supply DC line (05) is electrically connected with the power supply PCB (03);
the material pressing mechanism (4) comprises a material pressing block; the left side and the right side of the empty slot of the pressing block respectively press the power supply PCB (03) and the power supply DC line (05) during pressing, and the empty slot corresponds to the wiring hole (04) in the vertical direction for pressing, so that the welding mechanism (5) welds the power supply PCB (03) and the power supply DC line (05) at the wiring hole (04);
the jig positioning mechanism comprises a left positioning component (6) and a right positioning component (7) which are arranged in the conveying pull body (2), and a jig positioning space is formed between the left positioning component (6) and the right positioning component (7);
The left positioning assembly (6) is fixedly arranged on the frame (1), and comprises a left positioning seat and a positioning block, wherein the left positioning seat is fixedly arranged on the frame (1), a left mounting groove is formed in the left positioning seat, and the top surface and the right side surface of the left mounting groove are open surfaces; the positioning block is arranged in the rotatable left mounting groove through a left rotating shaft inserted into the front side wall and the rear side wall of the left mounting groove along the front-rear direction, the top surface of the positioning block is a cambered surface extending upwards obliquely to the right, and the right side surface of the positioning block is a vertical plane; a spring is connected between the lower part of the positioning block and the bottom of the left mounting groove; when the jig (3) passes through the left positioning component (6), the bottom surface of the jig (3) props against the cambered surface at the top of the positioning block, and presses down the positioning block to enable the positioning block to rotate clockwise around the left rotating shaft, and the spring is compressed; after the jig (3) passes through the left positioning component (6), the positioning block rotates anticlockwise around the left rotating shaft to the upper part of the jig (3) under the upward rebound force of the spring, so that the right side surface of the positioning block props against the left side end surface of the jig (3) to position the jig (3) from the left side;
the right positioning assembly (7) comprises a right positioning seat, a positioning wheel and a positioning cylinder, wherein the positioning cylinder is vertically arranged at the lower part of the frame (1), and the output end of the positioning cylinder is upwards arranged; the right positioning seat is fixedly arranged at the output end of the positioning cylinder, a right mounting groove is formed in the right positioning seat, and the left side surface and the top surface of the right mounting groove are open surfaces; the positioning wheel is rotatably arranged in the right mounting groove through a right rotating shaft inserted into the front side wall and the rear side wall of the right mounting groove along the front-rear direction; the jig (3) passes through the left positioning component (6), after being detected by the proximity switches arranged on the two sides of the left positioning component (6), the proximity switches send signals to the industrial personal computer, and the industrial personal computer controls the positioning cylinder to drive the right positioning seat to extend upwards to the upper part of the frame (1), so that the right positioning wheel blocks the jig (3) from the right side so as to be positioned;
The jig (3) further comprises a support plate (31), at least two groups of fixing components are arranged on the support plate (31), each fixing component is arranged on the support plate (31) at intervals along the left-right direction, and power supply components are respectively arranged so as to weld at least two power supplies at a time; the power supply component comprises a power supply lower shell (01), a power supply upper shell (02), a power supply PCB (03), a power supply DC line (05), a wire bundle (06) and a power supply connector (07);
the fixing assembly further comprises a power supply lower shell fixing seat (34), a power supply upper shell fixing seat (35) and a test seat (36), wherein the power supply lower shell fixing seat (34), the PCB fixing seat (32) and the DC line fixing frame (33) are sequentially arranged on the support plate (31) from left to right, and a power supply lower shell (01) is embedded in the power supply lower shell fixing seat (34);
the power supply upper shell fixing seat (35) and the test seat (36) are respectively arranged at the rear sides of the DC line fixing frame (33) and the power supply lower shell fixing seat (34); a power supply upper shell (02) is embedded in the power supply upper shell fixing seat (35); the front side part of the test seat (36) is provided with a slot so as to be convenient for inserting a wire bundle (06), the rear side part of the test seat (36) is provided with a conductive jack, both sides of the conductive jack are provided with test connecting holes, and an external test device is electrically connected with the test seat (36) through the test connecting holes; the power connector (07) is vertically inserted into the conductive jack and is electrically connected with the test seat (36), and the test seat (36) is connected into the test device through the power connector (07), the wire bundle (06) and the power DC wire (05) to electrically test the power PCB (03).
2. The automatic power source DC link welder of claim 1, wherein: the material pressing mechanism (4) further comprises a support (41), a material pressing cylinder (42), a connecting block (43), a material pressing spring (44) and a lifting plate (45), wherein the support (41) is vertically arranged in a mounting hole formed in the top plate of the frame (1) and extends upwards to the position above the top plate of the frame (1); the support (41) is positioned at the front side of the conveying pull body (2) and is correspondingly arranged between the left positioning component (6) and the right positioning component (7); the material pressing cylinder (42) is vertically arranged on the front side wall of the support (41), and the output end of the material pressing cylinder (42) is upwards arranged; the connecting block (43) is connected to the output end of the material pressing cylinder (42), and the material pressing cylinder (42) drives the connecting block (43) to move up and down; the lifting plate (45) is horizontally connected to the connecting block (43) and extends backwards to the upper part of the jig (3) along the horizontal direction; the lifting plate (45) is of a U-shaped plate body structure, a U-shaped opening of the lifting plate is arranged towards the rear side, the left side edge and the right side edge of the U-shaped opening of the lifting plate (45) respectively extend to the upper portion of the jig (3), and the lifting plate is correspondingly arranged with two fixing components on the jig (3) in the vertical direction.
3. A power supply DC link automatic welder as defined in claim 2, wherein: the pressing blocks comprise a first pressing block (46) and a second pressing block (47), and the first pressing block (46) and the second pressing block (47) are respectively arranged at the rear ends of the left side edge and the right side edge of the U-shaped opening of the lifting plate (45); the first pressing block (46) and the second pressing block (47) descend along with the lifting plate (45) so as to respectively press down the power supply components placed on the fixing assembly; the first pressing block (46) and the second pressing block (47) are respectively provided with a clearance groove, the opening of the clearance groove is arranged towards the rear side, and when the material is pressed, the left side and the right side parts of the clearance grooves of the first pressing block (46) and the second pressing block (47) respectively press the power supply PCB (03) and the power supply DC line (05); the two pressing springs (44) are vertically arranged at the lower part of the connecting block (43), and the upper end and the lower end of the pressing springs (44) are respectively connected to the bottom of the connecting block (43) and the top plate of the frame (1), so that a buffer force is provided when the connecting block (43) drives the lifting plate (45) to press materials, and the power supply PCB (03) or the power supply DC line (05) is prevented from being crushed; the lower part of the connecting block (43) is also provided with a proximity switch (48), the proximity switch (48) is arranged on the top plate of the frame (1), and the induction head of the proximity switch is upwards arranged so as to induce when the connecting block (43) descends, thereby preventing overvoltage.
4. A power supply DC link automatic welder as defined in claim 3, wherein: the welding mechanism (5) comprises two sets, wherein the two welding mechanisms (5) are respectively arranged at a first welding station and a second welding station, the welding mechanism (5) arranged at the first welding station is welded at a wiring hole (04) positioned at the front side or the rear side on each fixed component on the jig (3), and the welding mechanism (5) arranged at the second welding station is welded at a wiring hole (04) positioned at the rear side or the front side on each fixed component on the jig (3);
the welding mechanism (5) comprises brackets (51), a longitudinal driving assembly, a longitudinal support, a transverse driving assembly (54), a transverse support (55), a lifting driving assembly (56) and a fine adjustment and welding assembly (58), wherein the brackets (51) are longitudinally arranged above a first welding station and a second welding station in a crossing manner, the brackets (51) comprise three brackets (51) which are arranged at intervals from left to right, and a welding space is formed between every two adjacent brackets (51); the longitudinal driving component is arranged on the bracket (51); the longitudinal support is slidably arranged on the longitudinal driving assembly along the longitudinal direction and is connected with the output end of the longitudinal driving assembly, and the longitudinal driving assembly drives the longitudinal support to longitudinally and linearly move; the transverse driving assembly (54) is arranged on the longitudinal support and moves along with the longitudinal support; the transverse support (55) is slidably arranged on the transverse driving assembly (54) and is connected with the output end of the transverse driving assembly (54), and the transverse driving assembly (54) drives the transverse support (55) to linearly slide along the transverse direction; the lifting driving component (56) is arranged on the transverse support (55) and moves along with the transverse support (55); the fine adjustment and welding assembly (58) is connected to the output end of the lifting driving assembly (56) and driven by the lifting driving assembly (56) to move up and down in the vertical direction so as to descend to the wiring hole (04); after the angle or the position of the fine tuning component of the fine tuning and welding component (58) is fine tuned, the welding component of the fine tuning and welding component (58) fixes the power supply PCB (03) and the power supply DC line (05) at the wiring hole (04) by soldering tin;
The longitudinal driving assembly comprises a longitudinal motor (52) and a longitudinal linear module (53), wherein the longitudinal motor (52) is arranged at the rear side of the bracket (51), and the front side of the output end is arranged; the longitudinal linear module (53) is arranged at the front side of the longitudinal motor (52) and is connected with the output end of the longitudinal motor (52); the longitudinal support is arranged between two adjacent brackets (51) along the left-right direction, and two ends of the longitudinal support are respectively connected with the brackets (51) and a longitudinal linear module (53) on the other bracket (51) in a sliding way; a longitudinal screw rod arranged along the front-back direction is arranged in the longitudinal linear module (53), and the longitudinal screw rod is connected with the output end of the longitudinal motor (52); a longitudinal screw rod seat is sleeved on the longitudinal screw rod; one end of the longitudinal support is connected to a longitudinal screw rod seat, and when the longitudinal motor (52) drives the longitudinal screw rod to rotate, the longitudinal screw rod seat drives the longitudinal support to linearly move along the front-back direction;
the transverse driving assembly (54) comprises a transverse motor (541), a transverse screw rod (542) and a transverse screw rod seat (543), wherein the transverse motor (541) is arranged at the lower part of the longitudinal support, and an output shaft of the transverse motor (541) is arranged towards the right side; the transverse screw rod (542) is arranged at the front side of the transverse motor (541) along the left-right direction, the left end of the transverse screw rod (542) is fixed at the lower part of the longitudinal support through a bearing, and the right end of the transverse screw rod (542) is connected with the output shaft of the transverse motor (541) through a driving wheel and a driving belt; a transverse motor (541) drives the transverse screw rod (542) to rotate; the transverse screw rod seat (543) is sleeved on the transverse screw rod (542) and is in threaded connection with the transverse screw rod (542), and the upper end of the transverse screw rod seat (543) penetrates through the longitudinal support and is connected to the transverse support (55); the transverse support (55) is slidably arranged on the longitudinal support through a sliding rail arranged on the longitudinal support, and when the transverse screw rod (542) rotates, the transverse support (55) is driven to linearly slide along the left-right direction through the transverse screw rod seat (543);
The lifting driving assembly (56) comprises a lifting motor (561), a lifting screw rod (562) and a lifting screw rod seat, wherein the lifting motor (561) is arranged on the transverse support (55), and an output shaft is upwards arranged; the lifting screw rod (562) is vertically arranged on the front side of the lifting motor (561), the lower end of the lifting screw rod (562) is connected to the rear side wall of the transverse support (55) through a bearing, the upper end of the lifting screw rod (562) is connected to the output shaft of the lifting motor (561) through a driving wheel and a driving belt, and the lifting motor (561) drives the lifting screw rod (562) to rotate; the lifting screw rod seat is sleeved on the lifting screw rod (562) and is in threaded connection with the lifting screw rod (562); the lifting screw rod seat passes through the transverse support (55) to extend to the front side of the transverse support (55) and is connected with the fine adjustment and welding assembly (58); when the lifting screw rod (562) rotates, the lifting screw rod seat drives the fine adjustment and welding assembly (58) to move up and down.
5. The automatic power source DC link welder of claim 4, wherein: the fine adjustment and welding assembly (58) is slidably connected to the front side wall of the longitudinal support through a sliding rail vertically arranged on the front side wall of the longitudinal support; the trimming and welding assembly (58) comprises a trimming component and a welding component, wherein the trimming component is connected with the longitudinal support so as to support and adjust the position or angle of the welding component; the welding component is connected to the fine adjustment component so as to weld;
The fine tuning component comprises a lifting seat (581) and a fine tuning seat (583), wherein the lifting seat (581) can be slidably connected to the front side wall of the longitudinal support through a sliding rail vertically arranged on the front side wall of the longitudinal support, the rear side of the lifting seat (581) is connected with the lifting screw rod seat, and the lifting screw rod seat drives the lifting seat (581) to move in a lifting manner; the lifting seat (581) is provided with a first arc-shaped groove (582), the first arc-shaped groove (582) is arranged along the left-right direction, and the middle part of the first arc-shaped groove extends upwards; the rear end of the fine adjustment seat (583) is slidably connected in the first arc-shaped groove (582), and the fine adjustment seat (583) slides in the first arc-shaped groove (582) so as to adjust the angle or adjust the positions of the left, right, up and down directions in a vertical plane; the fine adjustment seat (583) is provided with a second arc-shaped groove (584), the second arc-shaped groove (584) is arranged along the front-back direction, and the middle part of the second arc-shaped groove extends rightwards; the welding member is slidably coupled to the second arc groove 584 so as to adjust an angle or a position in a front-rear and left-right direction in a plane where a top surface of the fine adjustment seat 583 is located.
6. The automatic power source DC link welder of claim 5, wherein: the welding component comprises a connecting seat (585), a welding driving piece, a welding support (589), a welding bracket (5810), a welding gun (5811), a tin wire clamping piece and a smoke suction pipe (5818), wherein the connecting seat (585) is slidably connected in the first arc-shaped groove (582); the welding driving piece is arranged on the connecting seat (585), and the output end of the welding driving piece is arranged downwards; the welding support (589) is connected to the lower part of the welding driving piece, and the welding driving piece drives the welding support (589) to move up and down; the welding bracket (5810) is fixed on a welding support (589); the welding gun (5811) is fixed on the welding bracket (5810), the welding bracket (5810) moves along with the welding support (589) and drives the welding gun (5811) to descend so as to enable the welding gun (5811) to be close to the wiring hole (04); the tin wire clamping piece is arranged at the side part of the welding bracket (5810), the lower end of the tin wire clamping piece clamps and fixes the tin wire, and the lower end of the tin wire is aligned with the lower end of the welding gun (5811) so as to weld; the smoking pipe (5818) is arranged at the side part of the welding bracket (5810), the lower end of the smoking pipe (5818) extends to the vicinity of the lower end of the welding gun (5811), and the upper end of the smoking pipe (5818) is connected with a smoking device so as to suck smoke generated in the welding process;
The welding driving piece comprises a welding cylinder (586), a welding sliding rail (587) and a welding push rod (588), wherein the welding cylinder (586) is fixedly arranged on the front side wall of the connecting seat (585), and the output end of the welding cylinder (586) is downwards arranged; the welding slide rail (587) is arranged on the front side wall of the connecting seat (585) along the vertical direction, and the welding support (589) is embedded on the welding slide rail (587) in a sliding manner; the upper end of the welding push rod (588) is connected to the output end of the welding cylinder (586), the lower end of the welding push rod is connected to the welding support (589), and the welding push rod (588) is sleeved with a buffer spring; the welding cylinder (586) pushes the welding support (589) to move up and down through the welding push rod (588) and is buffered through the buffer spring;
the tin wire clamping piece comprises a clamping seat (5812), a rotating seat (5813), a connecting rod (5814), a tin wire connecting seat (5815), a connecting plate (5816) and a tin wire sleeve (5817), wherein the clamping seat (5812) is fixedly arranged on one side of a welding bracket (5810), and an installation space is formed in the middle of the clamping seat (5812); the rotating seat (5813) is rotatably arranged in the installation space of the clamping seat (5812) through a rotating shaft, a spring is connected between the right side of the rotating seat (5813) and the inner side wall of the rotating seat (5813), and a screw rod connected to the right side wall of the clamping seat (5812) is screwed in or screwed out of the rotating seat (5813) to adjust the installation angle of the rotating seat (5813) in the clamping seat (5812); the upper end of the connecting rod (5814) is fixedly connected to the lower part of the rotating seat (5813), and the lower end of the connecting rod (5814) is connected with a tin wire connecting seat (5815); the upper end of the connecting plate (5816) is rotatably connected to the tin wire connecting seat (5815) so as to adjust the installation angle, and after the angle is adjusted, the connecting plate is fixed with the tin wire connecting seat (5815) through a screw; at least two connecting holes are uniformly arranged at intervals at the lower end of the connecting plate (5816); the tin wire sleeve (5817) is rotatably connected in the connecting hole so as to adjust the installation angle, and the installation height is adjusted by connecting different connecting holes; a wire sleeve 5817 is fixedly inserted with a wire, and the lower end of the wire is inclined and extended downward to the lower end of a welding gun 5811 for welding.
CN201810201570.5A 2018-03-12 2018-03-12 Automatic welding machine for power supply DC line Active CN108213645B (en)

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