CN101239422A - Small bevel angle full-automatic CO2 gas shielded welding and automatic submerged arc welding combined welding technique - Google Patents
Small bevel angle full-automatic CO2 gas shielded welding and automatic submerged arc welding combined welding technique Download PDFInfo
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- CN101239422A CN101239422A CN 200810085023 CN200810085023A CN101239422A CN 101239422 A CN101239422 A CN 101239422A CN 200810085023 CN200810085023 CN 200810085023 CN 200810085023 A CN200810085023 A CN 200810085023A CN 101239422 A CN101239422 A CN 101239422A
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Abstract
The invention relates to a welding technique, especially a combined welding process combining small bevel angle full-automatic CO2 gas shielded protection welding with unionmelt welding, comprising following steps: (1) opening a corresponding small angle bevel on the weldment with a bevel angle of 25<SUP>+5</SUP><SUB>0</SUB>DEG; (2) paring, ensuring welding space of 8<SUP>+2</SUP><SUB>0</SUB>mm; (3) grounding welding by using full-automatic CO2 gas shielded protection welding; (4) performing filling in and capping welding by using unionmelt welding. The advantages of the invention are: (1) small bevel angle welding, saving material and improving productivity; (2) grounding welding by using unionmelt welding, the electrical arc heat quantity is centralized, the heated area is small, the welding speed is quick, head affection range is contracted, and welding deformation is small; (3) crackle generation tendency is decreased; (4) bottom slag cleaning is avoided to prepare for narrow gap welding and welding efficiency is increased; (5) filling in and capping are performed by using unionmelt welding, so that welding speed and external appearance forming quality are assured.
Description
Technical field
The present invention relates to a kind of welding procedure, the full-automatic CO of especially a kind of small bevel angle
2Gas is protected the combined welding technology of weldering and Lincoln weld.
Background technology
At present, steel construction enterprise is in welding box-shaped process, and especially thick plates is taked 45 degree grooves, and the 6mm clearance gap directly adopts Lincoln weld to weld.Because bevel angle is bigger, packing material is many, cost of idleness, and welding deformation is bigger.In addition because the chemical metallurgy reaction at high temperature takes place in submerged arc flux and welding wire fuses together the slag that is produced with mother metal and float over face of weld, so after each layer submerged-arc welding finishes, all need to carry out the scarfing cinder processing.If the slag cleaning is not totally just welded the phenomenon that can cause slag inclusion or " rolling slag " and produced, influence the quality of whole welding line.The scarfing cinder process is a process very time-consuming and effort, particularly when submerged-arc welding welding root pass, because root run is narrower.Slag is bonded on weld seam and the both sides metal firmly, makes scarfing cinder work difficulty more. and in the welding process of root pass, the time that scarfing cinder needs is the several times of weld interval.Welding the needed time all is wasted on this process of scarfing cinder, has influenced whole welding efficiency.
Summary of the invention
The object of the invention is to overcome defective and the deficiency that exists in the prior art, and a kind of minimizing welding deformation is provided, and reduces cost, and can increase substantially the full-automatic CO of small bevel angle of welding efficiency
2Gas is protected the combined welding technology of weldering and Lincoln weld.
The present invention is achieved by the following technical programs:
The full-automatic CO of a kind of small bevel angle
2Gas is protected the combined welding technology of weldering and Lincoln weld, carries out as follows:
(1) on weldment, opens corresponding low-angle groove;
(2) group is right, guarantees weld gap;
(3) adopt full-automatic CO
2Gas is protected and is welded the welding that feels secure;
(4) adopt Lincoln weld to fill and cover welding.
In the wherein said step (1), bevel angle is 25
+ 5 0Degree.
In the wherein said step (2), weld gap is 8
+ 2 0Mm.
In the wherein said step (3), adopt the trolley type walking mechanism, welding wire is selected Φ 1.2mm solid welding wire for use, and gas is rich argon shield (80%--Ar, 20%--CO
2), be soldered to about 1/3 place of thickness of slab and stop.
In the wherein said step (4), adopt the double wire hidden arc welding rifle.
Advantage of the present invention mainly contains:
(1) material has been saved in small bevel angle welding, has improved production efficiency;
(2) adopting CO
2The welding that feels secure, in the arc heat quantity set, heating surface area is little, and speed of welding is fast, has dwindled the scope of heat affected area, and welding deformation is little.
(3) reduce the tendency that cracks.
(4) avoided the bottom scarfing cinder, done preparation, improved welding efficiency for narrow gap welding connects.
(5) use submerged arc welding and fill and capping, guaranteed speed of welding and appearance forming quality.
Description of drawings
Fig. 1 is weldment groove of the present invention and gap schematic diagram.
Fig. 2 is a welding line structure schematic diagram of the present invention.
Fig. 3 adopts trolley type walking mechanism welding schematic diagram for the present invention.
Among the figure: weldment 1, clivia mouth 2, liner 3, bottom weld seam 4, middle level and top layer weld seam 5, welding tractor 6, welding bench tool 7, box-shaped weldment 8, welding gun 9.
The specific embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
As shown in Figure 1 and Figure 2, no matter be any weldment 1, at first on weldment 1, open corresponding low-angle groove 2, groove 2 angles are 25
+ 5 0Degree; It is right to organize, and guarantees that weld gap is 8
+ 2 0Mm (being the minimum clearance of bottom weld seam 4); Weld then.
What Fig. 3 provided is a kind of example that welds box-shaped weldment 8.After finishing the determining of low-angle groove 2 and weld gap, weld according to the following steps:
(1) adopts full-automatic CO
2Gas is protected and welded the welding that feels secure, and promptly carries out the welding of bottom weld seam 4: adopt the trolley type walking mechanism to weld, this mechanism is made up of welding tractor 6, welding bench tool 7, welding gun 9, and welding gun 9 is CO
2Welding gun, gas are rich argon shield (80%--Ar, 20%--CO
2), welding wire is selected Φ 1.2mm solid welding wire for use, and welding current is 280A~320A, and voltage is 28V~32V, and speed of welding is 18~25m/h, is soldered to about 1/3 place of thickness of slab and stops welding.
(2) adopt Lincoln weld to fill and cover welding, promptly carry out the welding of middle level and top layer weld seam 5: adopt above-mentioned trolley type walking mechanism to weld equally, welding gun 9 is the double wire hidden arc welding rifle.
Claims (5)
1, the full-automatic CO of a kind of small bevel angle
2Gas is protected the combined welding technology of weldering and Lincoln weld, carries out as follows:
(1) on weldment, opens corresponding low-angle groove;
(2) group is right, guarantees weld gap;
(3) adopt full-automatic CO
2Gas is protected and is welded the welding that feels secure;
(4) adopt Lincoln weld to fill and cover welding.
2, the full-automatic CO of small bevel angle according to claim 1
2Gas is protected the combined welding technology of weldering and Lincoln weld, it is characterized in that: bevel angle is 25 in the step (1)
+ 5 0Degree.
3, the full-automatic CO of small bevel angle according to claim 1
2Gas is protected the combined welding technology of weldering and Lincoln weld, it is characterized in that: weld gap is 8 in the step (2)
+ 2 0Mm.
4, the full-automatic CO of small bevel angle according to claim 1
2Gas is protected the combined welding technology of weldering and Lincoln weld, it is characterized in that: adopt the trolley type walking mechanism in the step (3), welding wire is selected Φ 1.2mm solid welding wire for use, and gas is rich argon shield (80%-Ar, 20%-CO
2), be soldered to about 1/3 groove depth place and stop.
5, the full-automatic CO of small bevel angle according to claim 1
2Gas is protected the combined welding technology of weldering and Lincoln weld, it is characterized in that: adopt the double wire hidden arc welding rifle in the step (4).
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CN 200810085023 CN101239422A (en) | 2008-03-14 | 2008-03-14 | Small bevel angle full-automatic CO2 gas shielded welding and automatic submerged arc welding combined welding technique |
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CN 200810085023 CN101239422A (en) | 2008-03-14 | 2008-03-14 | Small bevel angle full-automatic CO2 gas shielded welding and automatic submerged arc welding combined welding technique |
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Cited By (24)
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CN102152010A (en) * | 2011-04-21 | 2011-08-17 | 浙江工业职业技术学院 | Method for welding bin pump |
CN102275026A (en) * | 2010-06-08 | 2011-12-14 | 上海振华重工(集团)股份有限公司 | Welding process for U-shaped rib of steel bridge panel |
CN102764936A (en) * | 2012-07-27 | 2012-11-07 | 济钢集团有限公司 | Big-thickness slab manufacturing technique |
CN102773616A (en) * | 2012-08-14 | 2012-11-14 | 武汉钢铁(集团)公司 | Composite welding method of high-strength low-yield-ratio LYR690 steel |
CN102785017A (en) * | 2012-08-02 | 2012-11-21 | 中国石油化工集团公司 | Composite welding process used in narrow space |
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CN103358037A (en) * | 2013-07-23 | 2013-10-23 | 洛阳宝环数控精密设备制造有限公司 | Method for welding T-shaped movable beam for deformed glass machining system |
CN103600163A (en) * | 2013-11-22 | 2014-02-26 | 沈阳大学 | Narrow-gap submerged arc welding slag cleaning device |
CN104853875A (en) * | 2012-12-04 | 2015-08-19 | 杰富意钢铁株式会社 | Method for narrow-gap, gas-shielded arc welding |
CN105945403A (en) * | 2016-06-20 | 2016-09-21 | 山东钢铁股份有限公司 | Welding technology for steel plates for ocean engineering |
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CN108393562A (en) * | 2018-05-09 | 2018-08-14 | 无锡洲翔成套焊接设备有限公司 | Steel plate submerged arc welding assembly line |
CN108747072A (en) * | 2018-05-21 | 2018-11-06 | 武汉钢铁有限公司 | A kind of tensile strength >=810MPa bridge steel thick plate large-line energy submerged arc complex welding methods |
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CN110076416A (en) * | 2019-06-03 | 2019-08-02 | 中铁宝桥集团有限公司 | A kind of combined welding method of the bridge 08Ni3DR of resistance to sea atmosphere corrosion steel |
CN111318790A (en) * | 2018-12-17 | 2020-06-23 | 施凯元 | Submerged arc welding method |
CN112171093A (en) * | 2020-09-16 | 2021-01-05 | 中船黄埔文冲船舶有限公司 | Submerged arc automatic welding process for transverse welding position of low-alloy high-strength steel thick plate |
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-
2008
- 2008-03-14 CN CN 200810085023 patent/CN101239422A/en active Pending
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CN102275026A (en) * | 2010-06-08 | 2011-12-14 | 上海振华重工(集团)股份有限公司 | Welding process for U-shaped rib of steel bridge panel |
CN102152010A (en) * | 2011-04-21 | 2011-08-17 | 浙江工业职业技术学院 | Method for welding bin pump |
CN103028817A (en) * | 2011-09-29 | 2013-04-10 | 中航鼎衡造船有限公司 | Mixed welding process for marine duplex stainless steel trough type bulkhead thick plate |
CN102764936B (en) * | 2012-07-27 | 2014-10-22 | 济钢集团有限公司 | Big-thickness slab manufacturing technique |
CN102764936A (en) * | 2012-07-27 | 2012-11-07 | 济钢集团有限公司 | Big-thickness slab manufacturing technique |
CN102785017A (en) * | 2012-08-02 | 2012-11-21 | 中国石油化工集团公司 | Composite welding process used in narrow space |
CN102785017B (en) * | 2012-08-02 | 2015-07-08 | 中国石油化工集团公司 | Composite welding process used in narrow space |
CN102773616A (en) * | 2012-08-14 | 2012-11-14 | 武汉钢铁(集团)公司 | Composite welding method of high-strength low-yield-ratio LYR690 steel |
CN104853875A (en) * | 2012-12-04 | 2015-08-19 | 杰富意钢铁株式会社 | Method for narrow-gap, gas-shielded arc welding |
CN103358037A (en) * | 2013-07-23 | 2013-10-23 | 洛阳宝环数控精密设备制造有限公司 | Method for welding T-shaped movable beam for deformed glass machining system |
CN103600163A (en) * | 2013-11-22 | 2014-02-26 | 沈阳大学 | Narrow-gap submerged arc welding slag cleaning device |
CN103600163B (en) * | 2013-11-22 | 2015-08-19 | 沈阳大学 | Narrow-clearance submerged arc welding slag cleaning plant |
CN105945403A (en) * | 2016-06-20 | 2016-09-21 | 山东钢铁股份有限公司 | Welding technology for steel plates for ocean engineering |
CN106346109A (en) * | 2016-11-17 | 2017-01-25 | 湖北鸿路钢结构有限公司 | Welding flux welding method applicable to ship welding line or fillet welding line |
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CN110076416A (en) * | 2019-06-03 | 2019-08-02 | 中铁宝桥集团有限公司 | A kind of combined welding method of the bridge 08Ni3DR of resistance to sea atmosphere corrosion steel |
CN112171093A (en) * | 2020-09-16 | 2021-01-05 | 中船黄埔文冲船舶有限公司 | Submerged arc automatic welding process for transverse welding position of low-alloy high-strength steel thick plate |
CN112775521A (en) * | 2020-12-22 | 2021-05-11 | 海洋石油工程(青岛)有限公司 | Double-gun mechanized gas shield transverse welding method |
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CN113399853A (en) * | 2021-06-24 | 2021-09-17 | 杭萧钢构股份有限公司 | Welding method and welding gun |
CN113399853B (en) * | 2021-06-24 | 2023-01-06 | 杭萧钢构股份有限公司 | Welding method and welding gun |
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Open date: 20080813 |