CN104028884B - Vertical ring mounted welder - Google Patents

Vertical ring mounted welder Download PDF

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Publication number
CN104028884B
CN104028884B CN201410301176.0A CN201410301176A CN104028884B CN 104028884 B CN104028884 B CN 104028884B CN 201410301176 A CN201410301176 A CN 201410301176A CN 104028884 B CN104028884 B CN 104028884B
Authority
CN
China
Prior art keywords
ring
column
welding
pipe
welder
Prior art date
Application number
CN201410301176.0A
Other languages
Chinese (zh)
Other versions
CN104028884A (en
Inventor
郭宏
王海东
Original Assignee
长城汽车股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 长城汽车股份有限公司 filed Critical 长城汽车股份有限公司
Priority to CN201410301176.0A priority Critical patent/CN104028884B/en
Publication of CN104028884A publication Critical patent/CN104028884A/en
Application granted granted Critical
Publication of CN104028884B publication Critical patent/CN104028884B/en

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Classifications

    • 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
    • B23K9/00Arc welding or cutting
    • B23K9/02Seam welding; Backing means; Inserts
    • B23K9/028Seam welding; Backing means; Inserts for curved planar seams
    • B23K9/0282Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
    • B23K9/0286Seam welding; Backing means; Inserts for curved planar seams for welding tube sections with an electrode moving around the fixed tube during the welding operation
    • 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
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0461Welding tables
    • 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
    • B23K9/00Arc welding or cutting
    • B23K9/02Seam welding; Backing means; Inserts
    • B23K9/028Seam welding; Backing means; Inserts for curved planar seams
    • B23K9/0288Seam welding; Backing means; Inserts for curved planar seams for welding of tubes to tube plates
    • 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
    • B23K9/00Arc welding or cutting
    • B23K9/24Features related to electrodes
    • B23K9/28Supporting devices for electrodes
    • B23K9/287Supporting devices for electrode holders
    • 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
    • B23K9/00Arc welding or cutting
    • B23K9/32Accessories
    • B23K9/323Combined coupling means, e.g. gas, electricity, water or the like

Abstract

The invention discloses a kind of vertical ring mounted welder, including rotatable platform and setting perpendicular with rotatable platform and the hollow pillar stand of gap suit, column is set with guide ring, conducting ring and ground wire grounded copper ring;Gas circuit, automatically controlled circuit and welding ground it is provided with in the cavity of column;Column top is fixed with workpiece locating mechanism;Wire-feed motor and welding gun mechanism it is fixed with on rotatable platform.The present invention provides rotary power by reductor, circuit transmission is carried out by conducting ring, break-make and the switching of gas are provided by guide ring, it is capable of welding gun various dimensions spatially and includes the adjustment of height left and right angle, carry out pipe pipe, pipe and flange, pipe and interplanar boxing, improve efficiency and the welding quality of product differentiation switching, it is achieved freely regulating of soldering angle and speed of welding, it unrestrictedly rotates boxing and need not turn round, it is possible to be greatly saved the time.The present invention is applicable to tube and tube, pipe and flange, pipe and interplanar boxing, or the welding of one section of arc.

Description

Vertical ring mounted welder
Technical field
The invention belongs to field of machining, relate to the welding equipment of hardware, a kind of vertical boxing Frock.
Background technology
In prior art, the girth welding technology that traditional pipe is used when welding with flange welding, tube and tube generally exists such as Lower defect:
1. the boxing of repeatability rotates and causes the support element protecting each side such as gas, compressed air, circuit control to occur Fatigue in various degree, occurs that compressed air, protective gas transfer pipeline leak gas, the fractureing or leak of circuit control aspect control line The faults such as electricity;
2. circuit controls more, causes whole welding control system more chaotic, and maintainability is poor;
3. soldering angle and speed adjustability are poor, and stability of the welding quality is poor.
A kind of circle welder disclosed in Chinese patent literature storehouse, including base, column, workbench, cylinder, main backstop, Wire-feed motor and welding gun, in the middle part of column, side is provided with workbench, and the top of column is provided with cylinder, the top side peace of column Equipped with main backstop, described wire-feed motor is installed on the top of main backstop, is fixed with the rotary shaft of hollow on main backstop, rotation The lower end of rotating shaft is provided with welding gun, and the top of rotary shaft is provided with guide ring, offers and cylinder in the middle part of described guide ring inwall The air slot of connection, the upper and lower end of guide ring inwall offers the seal groove sealing air slot, rotary shaft offers and inducing QI The inducing QI through hole of air slot connection on ring;It is provided with and the conductive copper of rotary shaft synchronous rotary at the middle part of rotary shaft, corresponding The conduction carbon brush coordinated with conductive copper is installed on main backstop, is laid with conductive copper and welding gun in the rotary shaft of hollow Between the cable of circuit turn-on.This patent can realize the endless-rotating of welding gun, and is unlikely to cable, the winding of inducing QI pipeline Problem.
But this patent can only realize, on an overall big part, smallclothes are carried out boxing.When welding base metal is separate During two individual components, this patent cannot realize the boxing between them (particularly when two individual components are that external diameter is bigger Parts or entire length long time this patent structure cannot realize welding).This patent is due to structurally column and weldering Rifle designs (i.e. welding gun is on column) for integral type, boxing process meeting overall when being therefore relatively large in diameter when welding base metal or be longer Occur following not enough:
(1) angle of welding gun cannot meet requirement.Welding gun and workpiece interfere or the cooperation of column and welding gun cannot reach Position to weld seam;
(2) welding stability of circular arc there will be wild effect.When welding base metal (workpiece) is large-diameter material, weldering The fixed mechanism of rifle can become the longest, and arrive position while welding time there will be inadequate situation, the stability of weldquality without Method ensures;
(3) when workpiece appearance is up big and down small or irregular, (outer rim is in irregular projection or other can produce work above Part is in the plane more than lower work piece outer rim) etc. special circumstances time, this patent cannot complete welding or cannot ensure to weld matter The stability of amount.
Summary of the invention
The goal of the invention of the present invention, is to provide a kind of vertical ring mounted welder, and it uses column for supporting, and column is distributed electricity Road, gas control loop device, and column is connected with base, and base is connected with the reductor of lower section, provide drive whole by reductor Body rotate power, periphery increase the most as required wire-feed motor, the source of welding current, PLC electrical control, man machine interface, button control, The element such as switch board and/or protective cover is with satisfied production.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of vertical ring mounted welder, including in rotatable platform and setting perpendicular with rotatable platform and gap suit Empty column, described column is fixedly installed, and described column is set with guide ring, conducting ring and ground wire grounded copper ring;Described column Cavity in be provided with the gas circuit being connected with described guide ring and the automatically controlled circuit being connected with described conducting ring, be additionally provided with The welding ground being connected with described ground wire grounded copper ring;Described column top is fixed with workpiece locating mechanism;Described rotatable Being fixed with wire-feed motor on platform, being further fixed on can oscilaltion and soldering angle adjustable welding gun mechanism.
As limitation of the invention:
Described vertical ring mounted welder also includes the horizontal-extending base being fixedly installed, and described column is fixed on described base Go up and upwardly extend;Described rotatable platform is horizontally placed on described base, and by the reductor being fixed on described base Structure drives and rotates.
Described workpiece locating mechanism is fixed on described column through bolt.
Between described guide ring with described column, end count seal is connected, and is provided with for controlling inside the top of described guide ring and side Compressed air processed and the perforate of protective gas break-make.
The both sides up and down of described guide ring are through bearing interference fit nested with described column, described conducting ring and described column Between matched in clearance, described conducting ring can rotate around described column.
Described ground wire grounded copper ring is connected with described welding ground through the hold down gag of peripheral hardware.
The lifting of welding gun mechanism, is controlled by the PLC controlling organization being fixedly arranged on described rotatable platform, and described PLC controls The circuit that controls of mechanism is located in the cavity of described column, and is connected with described conducting ring.
Workpiece through copper finger setting on described workpiece locating mechanism.This location mode is for pipe and welding between flange.
Workpiece is positioned on described workpiece locating mechanism through additional pipe.The welding between tube and tube of this location mode.
As limiting further, the outfan of described reducing gear is vertical rotating shaft, and described vertical rotating shaft is coaxially fixed Coupling and have gear, described rotatable platform is with the fluted disc being meshed with described gear.
Owing to have employed above-mentioned technical scheme, compared with prior art, acquired technological progress is the present invention:
(1) reduction gearing mechanism drives rotatable rotatable platform to rotate, thus drives the welding wire-feed motor of periphery, welding gun machine Structure rotates, it is achieved Guan Guan, pipe and flange, pipe and the various boxing of plane, or the welding of one section of arc;
(2) column and rotatable platform matched in clearance, and be mutually perpendicular between the two, thus reach the effect of welding quality stable Really;
(3) designing for perforate in the middle of column, whole cavity is used for gas circuit, circuit cable design, assembles the most successively Guide ring, conducting ring, ground wire grounded copper ring and workpiece locating mechanism, be avoided that circuit is wound around problem;
(4) guide ring is through bearing interference fit nested with column, to ensure the perpendicularity in rotary course and minimizing eccentric wear, Thus ensure welding precision;Control the gas control loop of welding gun mechanism lifting, all pass through in guide ring and column cavity Gas circuit is connected, it is to avoid outside exposed too much connecting line;
(5) conducting ring can rotate freely around column, and the inside of conducting ring carries out the circuit on 13-15 road and arranges whole to meet The welding wiring requirement of individual mechanism;
(6) ground wire grounded copper ring carries out the connection of welding ground by peripheral hardware hold down gag, to ensure normally entering of welding OK;
(7) column is attached by bolt location with workpiece locating mechanism, and pipe flange welding can pass through copper finger setting, then In periphery, the guide-localization plus pipe exposes with full by carrying out welding bead again behind two pipes location with satisfied welding, pipe sealing of tube needs Foot welding gun getatability welds;
(8) column and welding gun are isolating construction, and column is fixed on the base of vertical rotation, when reductor is rotated When platform rotates, boxing track forming stability is good, will not produce welding base metal and interfere;
(9) welding gun mechanism is fixed on rotation platform, can adjust the angle of welding gun according to the size cases of welding base metal Or the fixed position of welding gun, it is possible to ensure stability and the forming stability of boxing of welding quality;
(10) present invention is capable of the boxing of major diameter, and can guarantee that the stability of welding;
(11) present invention can also realize splicing the welding of mother metal space various shape, it is possible to ensures time in irregular shape The stability of welding quality.
The work process of the present invention is as follows:
After workpiece is positioned by workpiece locating mechanism, regulated the automatic lifting (weldering of welding gun mechanism by external PLC controlling organization The soldering angle of gunlock structure, by the welding gun secured adjusted mechanism regulation being fixed on rotatable platform, regulate afterwards such as fruit product Not switching, stability is relatively good), reducing gear rotarily drives rotatable rotatable platform and rotates, and welding gun mechanism is along with rotatable turn Moving platform carries out rotating and implementing welding operation, and this vertical ring mounted welder can carry out Infinite Cyclic boxing.
As fully visible, the present invention by reductor provide rotate power, it is possible to realize multiple product pipe pipe ring weldering, pipe with Flange boxing, pipe and the various boxing of plane, or the welding of one section of arc, improve the efficiency of product differentiation switching, welding Quality, it is achieved that freely regulating of soldering angle and speed of welding.
The present invention is applicable to tube and tube, pipe and flange, pipe and the various boxing of plane, or the welding of one section of arc.
The present invention is described in further detail with specific embodiment below in conjunction with Figure of description.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the embodiment of the present invention;
Fig. 2 is the partial structurtes schematic diagram of another angle of embodiment illustrated in fig. 1;
Fig. 3 is the overall structure schematic diagram of Fig. 1, embodiment illustrated in fig. 2 central post 1;
Fig. 4 is the structural representation of another angle of column 1 shown in Fig. 3;
Fig. 5 is the upward view of Fig. 1;
Fig. 6 is the top view of Fig. 1;
In figure: 1 column, 2 reducing gears, 3 rotatable platforms, 4 guide rings, 5 conducting rings, 6 ground wires Ground connection copper ring, 7 workpiece locating mechanisms, 8 welding gun mechanisms, 9 workpiece.
Detailed description of the invention
Embodiment one vertical ring mounted welder
With reference to Fig. 1, Fig. 2, Fig. 5, Fig. 6, the present embodiment includes the horizontal-extending base being fixedly installed, also includes rotatable Platform 3 and hollow pillar stand 1.
The overall structure of column 1 is as shown in Figure 3 and Figure 4.Column 1 is fixed on base and upwardly extends, on column 1 under Supreme it is set with guide ring 4, conducting ring 5, ground wire grounded copper ring 6.Column 1 top is fixed with workpiece locating mechanism 7 through bolt.
The gas circuit being connected with guide ring 4, and the electrical control lines being connected with conducting ring 5 it is provided with in the cavity of column 1 Road, is additionally provided with the welding ground being connected with ground wire grounded copper ring 6.
Reducing gear 2 is fixed on base, and outfan is vertical rotating shaft, and vertical rotating shaft has coaxially been fixedly connected gear.
Rotatable platform 3 is horizontally placed on base, for the toothed fluted disc structure of periphery.With reference to Fig. 6, this fluted disc and gear Be meshed, i.e. rotatable platform 3 is driven by gear and rotates.Being fixed with wire-feed motor on rotation platform 3, being further fixed on can oscilaltion And soldering angle adjustable welding gun mechanism 8.
The adjustment of welding gun mechanism 8 automatic lifting, is controlled by the PLC controlling organization being fixedly arranged on rotatable platform 3.Can revolve Turn and the facilities such as man machine interface, button control, switch board and protective cover on platform 3, can also be increased.
1 the end count seal of guide ring 4 and column is connected, and is provided with for controlling compression sky inside the top of guide ring 4 and side Gas and the perforate of protective gas break-make, perforate is used for break-make gas circuit.
The both sides up and down of guide ring 4 are through bearing interference fit nested with column 1, to support bigger thrust and entirety Moment of torsion.Guide ring 4 with between column 1 rely on sealing ring carry out seal coordinate.
Matched in clearance between conducting ring 5 and column 1, conducting ring 5 can rotate around column 1.Conducting ring 5 is internal carries out 13-15 The circuit on road is arranged with the welding wiring requirement meeting whole mechanism.
Ground wire grounded copper ring 6 is connected with welding ground through the hold down gag of peripheral hardware.
The circuit that controls of PLC controlling organization is located in the cavity of column 1, and is connected with conducting ring 5.And welding gun mechanism The soldering angle of 8, by the welding gun secured adjusted mechanism regulation being fixed on rotatable platform 3, regulate afterwards as fruit product is not cut Changing, stability is relatively good.
Pipe with flange welding time, workpiece 9 through copper finger setting on workpiece locating mechanism 7;During tube and tube welding, workpiece 9 warp Additional pipe is positioned on workpiece locating mechanism 7.

Claims (8)

1. a vertical ring mounted welder, it is characterised in that: include rotatable platform and and the perpendicular setting of rotatable platform and The hollow pillar stand of gap suit;
Described column is fixedly installed, and described column is set with guide ring, conducting ring and ground wire grounded copper ring;In described column It is provided with the gas circuit being connected with described guide ring and the automatically controlled circuit being connected with described conducting ring in cavity, is additionally provided with and institute State the welding ground that ground wire grounded copper ring is connected;Described column top is fixed with workpiece locating mechanism;Described rotatable platform On be fixed with wire-feed motor, being further fixed on can oscilaltion and soldering angle adjustable welding gun mechanism;Described vertical ring mounted welder is also Including the horizontal-extending base being fixedly installed, described column is fixed on described base and upwardly extends;Described rotatable flat Platform is horizontally placed on described base, and is driven rotation by the reducing gear being fixed on described base, described reducing gear Outfan is vertical rotating shaft, and described vertical rotating shaft has coaxially been fixedly connected gear, described rotatable platform with described tooth The fluted disc that wheel is meshed;Reducing gear drive rotatable platform rotate, and drive wire-feed motor, welding gun mechanism rotate with to pipe with Pipe, pipe with flange or pipe with plane boxing.
Vertical ring mounted welder the most according to claim 1, it is characterised in that: described workpiece locating mechanism is fixed on through bolt On described column.
Vertical ring mounted welder the most according to claim 1, it is characterised in that: sealed between described guide ring and described column Circle connects, and is provided with the perforate for controlling compressed air and protective gas break-make inside the top of described guide ring and side.
Vertical ring mounted welder the most according to claim 1, it is characterised in that: the both sides up and down of described guide ring through bearing with Column nesting interference fit.
Vertical ring mounted welder the most according to claim 1, it is characterised in that: between described conducting ring and described column, gap is joined Closing, described conducting ring can rotate around described column.
Vertical ring mounted welder the most according to claim 1, it is characterised in that: described ground wire grounded copper ring is through the compression of peripheral hardware Device is connected with described welding ground.
Vertical ring mounted welder the most according to claim 1, it is characterised in that: the lifting of welding gun mechanism, described by being fixedly arranged on PLC controlling organization on rotatable platform controls, and the circuit that controls of described PLC controlling organization is located at the cavity of described column In, and be connected with described conducting ring.
Vertical ring mounted welder the most according to claim 1, it is characterised in that: workpiece is positioned described through copper pin or additional pipe On workpiece locating mechanism.
CN201410301176.0A 2014-06-30 2014-06-30 Vertical ring mounted welder CN104028884B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410301176.0A CN104028884B (en) 2014-06-30 2014-06-30 Vertical ring mounted welder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410301176.0A CN104028884B (en) 2014-06-30 2014-06-30 Vertical ring mounted welder

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Publication Number Publication Date
CN104028884A CN104028884A (en) 2014-09-10
CN104028884B true CN104028884B (en) 2017-01-04

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105583504A (en) * 2014-10-23 2016-05-18 五冶集团上海有限公司 Automatic welding device for steel pipe column annular plate and application method of automatic welding device
CN104308331A (en) * 2014-10-27 2015-01-28 无锡华联科技集团有限公司 Rotary structure for longitudinal welding machine
CN104476036B (en) * 2014-12-04 2018-06-22 大连东拓工程机械制造有限公司 Excavator swing arm and loading machine rocking arm circumference automatic welding machine
CN104493341B (en) * 2014-12-15 2016-05-25 哈尔滨电气动力装备有限公司 Shield electric machine stator can and lower flange welding method and the equipment using thereof
CN104668800A (en) * 2015-02-11 2015-06-03 李世强 Multi-gun welding equipment for water discharging branch pipe flange of engine
CN105057959A (en) * 2015-07-20 2015-11-18 湖州美胜机械有限公司 Rotary welding tooling
CN105195937B (en) * 2015-10-21 2016-11-30 重庆纵翼机械制造有限公司 Automatic welding machine
CN110653513A (en) * 2019-09-06 2020-01-07 桐乡嘉丰精密机械有限公司 Circular seam welding device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5212363A (en) * 1991-10-28 1993-05-18 The Babcock & Wilcox Company Torch for removing steam generator tubes
JPH115168A (en) * 1997-06-13 1999-01-12 Mitsubishi Heavy Ind Ltd Gas sealded arc welding torch
CN2778453Y (en) * 2004-07-23 2006-05-10 北京东方新强设备制造有限公司 Automatic welding apparatus for S-type helical blade surface
CN101306488B (en) * 2007-05-14 2011-04-27 上海电气电站设备有限公司 Double arc four wire automatic arc-submerging welder and manufacture method thereof
CN201889575U (en) * 2010-11-30 2011-07-06 长城汽车股份有限公司 Automatic welding device of circular weld bead
CN202192385U (en) * 2011-08-03 2012-04-18 珠海固得焊接自动化设备有限公司 Rotary circular welding machine with welding torch

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