CN103143818B - Single-pass multilayer welding device and method for medium plate - Google Patents
Single-pass multilayer welding device and method for medium plate Download PDFInfo
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- CN103143818B CN103143818B CN201310080538.3A CN201310080538A CN103143818B CN 103143818 B CN103143818 B CN 103143818B CN 201310080538 A CN201310080538 A CN 201310080538A CN 103143818 B CN103143818 B CN 103143818B
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Abstract
The invention belongs to the technical field of welding technologies in material processing engineering, and relates to a single-pass multilayer welding device and a method for a medium plate, in particular to a single-pass multilayer GMAW (Gas Metal Arc Welding) method and a device for a 30-45mm thick medium plate. The device comprises a welding gun, a swing structure and a control system, wherein a welding joint groove is in a V-shaped belt backing plate groove form; an angle is 5-8 degrees; the gap width is 8-15mm; welding shielding gas adopts mixed gas of carbon dioxide and argon; a gas flow is 20-25L/min; and a metal transfer form during a welding course is spray transfer. The device and the method have the advantages that the welding efficiency of the medium plate can be improved effectively by the single-pass multilayer welding method, a side wall fusion effect can be improved by controlling arc swing, and the welding quality can be improved.
Description
Technical field
The present invention relates to a kind of cut deal single track multilayer welding connection device and method.
Background technology
According to " 2011 China's steel industry yearbook ", the existing heavy and medium plate mill total productive capacity of China is 9,331 ten thousand t/a, within 2010, produce cut deal 7,221 ten thousand t altogether, these cut deals are widely used in the industries such as shipbuilding, pressure vessel, bridge, skyscraper, nuclear power.
The traditional welding method of slab generally adopts multi-pass welding.Along with the thickness of workpiece increases gradually, traditional method table reveals significant limitation.Because welding construction material intensity is high, its weldability is poor, needs weld preheating, and wlding is thick, and structure is large, brings a lot of difficulty to preheating, and welding working condition is poor, length consuming time.And traditional welding method heat input is large, heat affected area is wide, coarse grains, under the acting in conjunction of the large constraint degree of slab with a large amount of filling metal freezing convergent force, there is larger residual stress and welding deformation in welding point, welding joint mechanical property is poor, the weld defect such as easily to crack.Modern industry in producing more adopts high strength steel structure, and the rigidity of this structure is large, and postwelding produces very high residual stress, once distortion is difficult to correct, therefore need to weld under lower heat input, and this will cause welding efficiency to reduce.
Summary of the invention
The object of the present invention is to provide a kind of cut deal single track multilayer welding connection device and method, it has can welding efficiency is high and welding quality is good advantage.
The present invention is achieved like this, a kind of cut deal single track multilayer welding connection device, it comprises computer, motion controller, robot, swing mechanism, welding gun, welding machine and cable, swing mechanism also comprises encoder, motor, decelerator, force bearing plate, swing connecting bar, engaging lug and fixed head, it is characterized in that swing mechanism is by encoder, motor, decelerator, force bearing plate, swing connecting bar, engaging lug and fixed head are formed, wherein the top of motor is connected with encoder, the bottom of motor is connected with decelerator, motor and decelerator are fixed on force bearing plate by bolt arrangement, the right-hand member of force bearing plate is connected with joint, robot end, swing connecting bar one end is fixedly connected with reducer output shaft with bolt arrangement by key, the other end is connected with engaging lug by bolt, fixed head side is connected with engaging lug by bolt, opposite side is connected with welding gun by bolt, encoder on swing mechanism is connected with motion controller by cable, and welding gun is connected with welding machine by cable.Described computer is connected by DR9 interface with the communication of motion controller; Described welding gun is crank welding gun; Described welding method is welding point sheet metal thickness size range is 30 ~ 45mm, and grooves of welding joints form is V-belt backing plate groove, and angle is 5 ° ~ 8 °, and gap width is 8 ~ 15mm; Adopt GMAW welding manner, welding method comprises the steps:
(1) welds prepares: impurity and the oxide-film of clearing up workpiece two side to be welded, be mounted with on the table;
(2) weld: protection-gas welding adopts the mist of carbon dioxide and argon gas, gas flow is 20 ~ 25L/min, welding adopts the welding method of single track multilayer, and in welding process, mode of metal transfer is spray transfer, and ignition tip and surface of the work keep the angle of 10 ° ~ 20 °; Welding condition is: arc voltage 27 ~ 32V, welding current 270 ~ 300A, speed of welding 27 ~ 30cm/min; Every layer is soldered rear trimming surface, then carries out lower one deck welding.
Technique effect of the present invention is: the present invention effectively can improve the welding efficiency of cut deal by the welding method of single track multilayer, can improve sidewall fusion effect by the swing controlling electric arc, improves welding quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention.
Fig. 2 is the structural representation of swing mechanism.
Fig. 3 is the movement locus of welding wire end.
In the drawings, 1, computer 2, motion controller 3, robot 4, swing mechanism 5, welding gun 6, welding machine 7, cable 8, encoder 9, motor 10, decelerator 11, force bearing plate 12, swing connecting bar 13, engaging lug 14, fixed head.
Detailed description of the invention
As depicted in figs. 1 and 2, the present invention is achieved like this, it comprises computer 1, motion controller 2, robot 3, swing mechanism 4, welding gun 5, welding machine 6 and cable 7, swing mechanism 4 also comprises encoder 8, motor 9, decelerator 10, force bearing plate 11, swing connecting bar 12, engaging lug 13 and fixed head 14, its design feature is swing mechanism 4 is by encoder 8, motor 9, decelerator 10, force bearing plate 11, swing connecting bar 12, engaging lug 13 and fixed head 14 are formed, wherein the top of motor 9 is connected with encoder 8, the bottom of motor 9 is connected with decelerator 10, motor 9 and decelerator 10 are fixed on force bearing plate 11 by bolt arrangement, the right-hand member of force bearing plate 11 is connected with robot 3 last joint, swing connecting bar 12 one end is fixedly connected with decelerator 10 output shaft with bolt arrangement by key, the other end is connected with engaging lug 13 by bolt, fixed head 14 side is connected with engaging lug 13 by bolt, opposite side is connected with welding gun 5 by bolt, encoder 8 on swing mechanism 4 is connected with motion controller 2 by communication cable, being connected with welding machine 6 by cable 7 of welding gun 5.Described computer 1 is connected by DR9 interface with the communication of motion controller 2; Described welding gun 5 is crank welding gun;
In welding process, robot 3 controls path of welding, swing mechanism 4 controls the swing of electric arc in welding process, pass through the cooperative motion of robot 3 and swing mechanism 4 during welding, realize electric arc reciprocally swinging in weld gap and advance, thus the single track realizing cut deal is shaped.
Drive swing mechanism 4 to rotate by the output shaft of decelerator 10, then drive the swing of welding gun 5, not stopping to change and realize the continuous swing of electric arc in gap by motor 9 positive-negative rotation state.Encoder 8 is installed on motor 9, for recording machine operating condition.In swing process, the operating condition of motor 9 is real-time transmitted to computer 1 through motion controller 2, and computer 1 sends signal by software systems, changes the operating condition of motor 9 through motion controller 2.Computer 1 passes through DR9 interface with the communication of motion controller 2.
Welding method, described welding point sheet metal thickness size range is 30 ~ 45mm.Grooves of welding joints form is V-belt backing plate groove, and angle is 5 ° ~ 8 °, and gap width is 8 ~ 15mm;
Adopt GMAW welding manner, welding method comprises the steps:
A, welds prepares: impurity and the oxide-film of clearing up workpiece two side to be welded, without the need to preheating, be mounted with on the table;
B, welding: protection-gas welding adopts the mist of carbon dioxide and argon gas, and gas flow is 20 ~ 25L/min, welding adopts the welding method of single track multilayer.In welding process, mode of metal transfer is spray transfer.Welding condition is: arc voltage 27 ~ 32V, welding current 270 ~ 300A, speed of welding 27 ~ 30cm/min.Every layer is soldered rear trimming surface, then carries out lower one deck welding.
Fig. 3 is the movement locus figure of welding wire end, and the movement locus of welding wire is the coupling path of welding direction and swaying direction.When cut deal single track multilayer welding in order to ensure the fusion of sidewall, so wire oscillation stops 0.2 ~ 0.3ms to during two side, therefore only has the motion of welding direction.In order to absolutely prove characteristic of the present invention, provide actual welding example below.Proceed to back welding experiment for Q235 mild steel, groove is V-belt backing plate groove, and bevel angle is 12 °, and gap width is 14mm, and Sidewall Height is 35mm.Protection gas is 20%Ar+80%CO2, and flow is 20L/min.Welding current is 285A, and weldingvoltage is 30.1V, and speed of welding is 25cm/min, and the amplitude of oscillation is 6, and the sidewall time of staying is 0.25s.By observing weld appearance figure and the weld seam macroscopic cross section figure of welding result, can find out that sidewall fusion is effective, face of weld is smooth, without splashing.
Claims (3)
1. a cut deal single track multilayer welding connection device, it comprises computer, motion controller, robot, swing mechanism, welding gun, welding machine and cable, swing mechanism also comprises encoder, motor, decelerator, force bearing plate, swing connecting bar, engaging lug and fixed head, it is characterized in that swing mechanism is by encoder, motor, decelerator, force bearing plate, swing connecting bar, engaging lug and fixed head are formed, wherein the top of motor is connected with encoder, the bottom of motor is connected with decelerator, motor and decelerator are fixed on force bearing plate by bolt arrangement, the right-hand member of force bearing plate is connected with joint, robot end, swing connecting bar one end is fixedly connected with reducer output shaft with bolt arrangement by key, the other end is connected with engaging lug by bolt, fixed head side is connected with engaging lug by bolt, opposite side is connected with welding gun by bolt, encoder on swing mechanism is connected with motion controller by cable, and computer is connected by DR9 interface with the communication of motion controller, and welding gun is connected with welding machine by cable.
2. a kind of cut deal single track multilayer welding connection device according to claim 1, is characterized in that described welding gun is crank welding gun.
3. the welding method of a kind of cut deal single track multilayer welding connection device according to claim 1, it is characterized in that welding point sheet metal thickness size range is 30 ~ 45mm, grooves of welding joints form is V-belt backing plate groove, and angle is 5 ° ~ 8 °, and gap width is 8 ~ 15mm; Adopt GMAW welding manner, welding method comprises the steps:
(1) welds prepares: impurity and the oxide-film of clearing up workpiece two side to be welded, be mounted with on the table;
(2) weld: protection-gas welding adopts the mist of carbon dioxide and argon gas, gas flow is 20 ~ 25L/min, welding adopts the welding method of single track multilayer, and in welding process, mode of metal transfer is spray transfer, and ignition tip and surface of the work keep the angle of 10 ° ~ 20 °; Welding condition is: arc voltage 27 ~ 32V, welding current 270 ~ 300A, speed of welding 27 ~ 30cm/min; Every layer is soldered rear trimming surface, then carries out lower one deck welding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310080538.3A CN103143818B (en) | 2013-03-14 | 2013-03-14 | Single-pass multilayer welding device and method for medium plate |
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| CN201310080538.3A CN103143818B (en) | 2013-03-14 | 2013-03-14 | Single-pass multilayer welding device and method for medium plate |
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| CN103143818A CN103143818A (en) | 2013-06-12 |
| CN103143818B true CN103143818B (en) | 2015-05-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104400191A (en) * | 2014-10-24 | 2015-03-11 | 张耀忠 | Carbon dioxide welding method |
| CN104972199A (en) * | 2015-06-05 | 2015-10-14 | 吴志明 | Ship welding process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3715559A (en) * | 1972-04-10 | 1973-02-06 | Arcos Corp | Vertical welding machine having swinging equipment head |
| CN1302244A (en) * | 1998-04-10 | 2001-07-04 | 阿马迪整合系统公司 | Welding system and method |
| CN201128043Y (en) * | 2007-12-28 | 2008-10-08 | 渤海船舶重工有限责任公司 | Gun welder oscillating device for welding flange of pipe |
| CN101569972A (en) * | 2009-06-12 | 2009-11-04 | 温岭市风云机器人有限公司 | Welding manipulator |
| CN201371332Y (en) * | 2008-10-22 | 2009-12-30 | 温岭市风云机器人有限公司 | Welding manipulator |
| CN201493625U (en) * | 2009-05-07 | 2010-06-02 | 新疆威奥科技股份有限公司 | Multifunctional welding gun oscillator |
| CN102615390A (en) * | 2012-04-28 | 2012-08-01 | 湘潭大学 | Swing arc-based multi-layer and multi-channel weld tracking system and identification method thereof |
-
2013
- 2013-03-14 CN CN201310080538.3A patent/CN103143818B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3715559A (en) * | 1972-04-10 | 1973-02-06 | Arcos Corp | Vertical welding machine having swinging equipment head |
| CN1302244A (en) * | 1998-04-10 | 2001-07-04 | 阿马迪整合系统公司 | Welding system and method |
| CN201128043Y (en) * | 2007-12-28 | 2008-10-08 | 渤海船舶重工有限责任公司 | Gun welder oscillating device for welding flange of pipe |
| CN201371332Y (en) * | 2008-10-22 | 2009-12-30 | 温岭市风云机器人有限公司 | Welding manipulator |
| CN201493625U (en) * | 2009-05-07 | 2010-06-02 | 新疆威奥科技股份有限公司 | Multifunctional welding gun oscillator |
| CN101569972A (en) * | 2009-06-12 | 2009-11-04 | 温岭市风云机器人有限公司 | Welding manipulator |
| CN102615390A (en) * | 2012-04-28 | 2012-08-01 | 湘潭大学 | Swing arc-based multi-layer and multi-channel weld tracking system and identification method thereof |
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