CN105583503A - Carbon steel tube welding process - Google Patents
Carbon steel tube welding process Download PDFInfo
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- CN105583503A CN105583503A CN201410569895.0A CN201410569895A CN105583503A CN 105583503 A CN105583503 A CN 105583503A CN 201410569895 A CN201410569895 A CN 201410569895A CN 105583503 A CN105583503 A CN 105583503A
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Abstract
The invention discloses a carbon steel tube welding process. According to the welding process, manual argon arc welding is adopted for backing weld, flux-cored wire CO2 gas shielded welding is adopted for a filling capping surface, and CO2 absorbs heat while protecting a molten pool, so that the ambient temperature of the molten pool can be lowered, an effect of arc shrinking can be achieved, and therefore, heat input quantity is small, weld quality is high, manual arc welding is replaced, discard electrodes are avoided, welding slag is less, smoke is less, welding production efficiency is high, and weld appearance is attractive.
Description
Technical field
The present invention relates to a kind of welding procedure, refer to especially a kind of carbon steel tubing welding procedure.
Background technology
Carbon steel process pipe welding quality is had relatively high expectations. Normally backing welding adopts manual argon arc welding, and filling and capping adopt manual metal-arc welding technique. Because manual metal-arc welding deposition efficiency is low, speed of welding is slow, and manual metal-arc welding adopts welding rod, and welding rod deposition efficiency is low, and the waste of the energy is large and leave discard electrode and easily cause the wasting of resources, and it is large that welding rod is changed welder's labour intensity back and forth, and welding rod
Also need to dry, be incubated and deposit, make like this manual metal-arc welding overall efficiency low, cost is high. In addition in the welding for carbon steel process pipe, backing welding be the most complicated be also the most difficult, in the time of backing welding, often electric arc is inhomogeneous in the groove both sides time of staying, arc length is unstable, thus cause the moulding of bottom welding bead outward appearance bad, do not merge, the even defect such as incomplete root penetration of pore
Often there is indent or interior undercut defect in inner-walls of duct, degree is inhomogeneous thoroughly for inner-walls of duct like this, and the weldquality of inwall is not high, cannot meet the quality requirement of process pipe.
Summary of the invention
Technical problem to be solved by this invention is: a kind of carbon steel tubing welding procedure is provided, and this welding procedure integrated cost is low, and welding production efficiency is high, and appearance of weld is attractive in appearance, and heat input is little, and pore tendency is little, and weldquality is stable.
Another technical problem to be solved by this invention is: a kind of carbon steel tubing welding procedure is provided, it is unstable that backing welding in this welding procedure has overcome prior art welding quality, welder's technical ability is required to high bottleneck, appearance of weld by this welding procedure is attractive in appearance, and weldering line is even, and heat input is little, dense structure, weldquality is stable, and welding main points are easily grasped
Pipe material inner wall weldquality is high.
For solving the problems of the technologies described above, technical scheme of the present invention is: 1. carbon steel tubing welding procedure, comprises the following steps:
Before A, weldering, prepare, comprise step by step following: a1) selection tool; A2) acceptance of instrument; A3) tubing rule and carry out dimensional gaughing; A4), to tubing cutting stock, ensure the perpendicularity of otch end face and tubing axis; A5) the otch end face finished edge of two tubing to need welding, the bevel angle sum that makes two tubing is 55 °-72 °, root face is 0.5-1mm; A6) by clean the eliminating impurities within the scope of groove surfaces externally and internally 20mm, expose metallic luster; B, two tubing that needs are welded are grouping, and comprise step by step following: b1) tooling fixture, point solid piece with tubing the material identical or identical group of confirmation group to use; B2), by two tubing horizontal group pair, 6 of the tubing hour positions group of locating is to gap
For 3.2mm, ten two groups of locating are greater than 3.2mm to gap; C, two tubing carrying out to tack welding, comprise step by step following: c1) tack welding welding wire and the technique used is identical with formal weldering,
Tack-weld will fuse in weld seam; C2) tubing is carried out to tack welding, tack welding solder joint should avoid tubing hour position three, six, nine, ten two points; C3) quality of inspection tack welding; C4) tack-weld two ends are polished into gentle slope type;
Before D, weldering, objective factor checks to external world;
E, handwork tungsten electrode argon arc backing welding;
In F, handwork tungsten electrode argon arc backing welding welding process, each objective factor of welding is checked;
The postwelding inspection of G, handwork tungsten electrode argon arc backing welding;
H, flux-cored wire CO2 gas shielded arc welding are filled capping, adopt DC reverse connection, and leftward welding, comprises step by step following:
H1) select suitable welding current, voltage, CO2 gas flow according to the wall thickness of carbon steel piping, material, welding wire melting falls into the mode in molten bath and selects short circuiting transfer;
H2) starting the arc in the groove of 10mm from welding position, the starting the arc should be avoided 6 positions;
H3) flux-cored wire CO2 gas shielded welding torch is along 6 point-tri-s' points-12 or the walking of six point-nine point-12, then along 6 point-nines' points-12 or the walking of six point-tri-point-12, so repeatedly, receives arc position at every turn and avoid ten two positions and stagger;
H4) flux-cored wire CO2 gas shielded arc welding adopts short arc welding, and evenly swings steadily and move, and speed of welding 6-15cm/min controls pool width in 5-12mm scope;
H5), when flux-cored wire CO2 gas shielded welding torch runs to 6 positions, flux-cored wire axis and horizontal plane angle are between 75 °-85 °; While running to or 3 positions at 9, between 5 °-15 ° of flux-cored wire axis and horizontal plane angles; While running to horizontal level, flux-cored wire axis and horizontal plane angle are between 70 °-85 °; In the welding process of I, flux-cored wire CO2 gas shielded arc welding, each objective factor of welding is checked; The postwelding inspection of J, flux-cored wire CO2 gas shielded arc welding.
2. carbon steel tubing welding procedure as claimed in claim 1, it is characterized in that: in the a1 of steps A, selection tool is that to select argon-arc torch, the diameter of 75 ° be the cerium tungsten electrode of 40-50mm, length be 3-4m handgrip wire, diameter 2.0mm or 2.4mm, the tip of cerium tungsten electrode is processed as the truncated cone of 35 °-45 ° of taperings, and the axis of small circle of truncated cone is
0.8-1.0mm, the extension elongation of the porcelain mouth of the relative argon-arc torch of cerium tungsten electrode is 6-8mm; Select CO2/MAG semi-automatic arc welder and CO2 flowmeter, the ignition tip length that the front flux-cored wire of the starting the arc exposes CO2 gas shielded welding torch is 15-20mm.
Adopt after technique scheme, effect of the present invention is: 1) fill capping and adopt flux-cored wire CO2 gas shielded arc welding, in the process of CO2 protection molten bath, absorb heat, can reduce the temperature of periphery, molten bath, play the effect of shrinking electric arc, thereby heat affected area reduces, weldquality is high, and has replaced manual metal-arc welding, without discard electrode, welding slag is few, and flue dust is few; 2) select suitable soldering supplying angle according to the different position of tubing, not only improved the protection effect of protective gas, and be conducive to welder's visual angle, be convenient to effectively to control melting pool shape regular, improve welding quality; 3) selection of starting the arc position He Shouhu position improves welding quality; 4) due to the continuous wire feed of flux-cored wire, welding machine open circuit loss is little, and flux-cored wire cross section current density is high, and burn-off rate is fast, and production efficiency is high, energy-conserving and environment-protective, and integrated cost is low.
Detailed description of the invention
Below by specific embodiment, the present invention is described in further detail.
1. carbon steel tubing welding procedure, comprises the following steps:
Before A, weldering, prepare, comprise step by step following: a1) selection tool; A2) acceptance of instrument; A3) tubing rule and carry out dimensional gaughing; A4), to tubing cutting stock, ensure the perpendicularity of otch end face and tubing axis; A5) the otch end face finished edge of two tubing to need welding, the bevel angle sum that makes two tubing is 55 °-72 °, root face is 0.5-1mm; A6) by clean the eliminating impurities within the scope of groove surfaces externally and internally 20mm, expose metallic luster; B, two tubing that needs are welded are grouping, and comprise step by step following: b1) tooling fixture, point solid piece with tubing the material identical or identical group of confirmation group to use; B2), by two tubing horizontal group pair, 6 of the tubing hour positions group of locating is to gap
For 3.2mm, ten two groups of locating are greater than 3.2mm to gap; C, two tubing carrying out to tack welding, comprise step by step following: c1) tack welding welding wire and the technique used is identical with formal weldering,
Tack-weld will fuse in weld seam; C2) tubing is carried out to tack welding, tack welding solder joint should avoid tubing hour position three, six, nine, ten two points; C3) quality of inspection tack welding; C4) tack-weld two ends are polished into gentle slope type;
Before D, weldering, objective factor checks to external world;
E, handwork tungsten electrode argon arc backing welding;
In F, handwork tungsten electrode argon arc backing welding welding process, each objective factor of welding is checked;
The postwelding inspection of G, handwork tungsten electrode argon arc backing welding;
H, flux-cored wire CO2 gas shielded arc welding are filled capping, adopt DC reverse connection, and leftward welding, comprises step by step following:
H1) select suitable welding current, voltage, CO2 gas flow according to the wall thickness of carbon steel piping, material, welding wire melting falls into the mode in molten bath and selects short circuiting transfer;
H2) starting the arc in the groove of 10mm from welding position, the starting the arc should be avoided 6 positions;
H3) flux-cored wire CO2 gas shielded welding torch is along 6 point-tri-s' points-12 or the walking of six point-nine point-12, then along 6 point-nines' points-12 or the walking of six point-tri-point-12, so repeatedly, receives arc position at every turn and avoid ten two positions and stagger;
H4) flux-cored wire CO2 gas shielded arc welding adopts short arc welding, and evenly swings steadily and move, and speed of welding 6-15cm/min controls pool width in 5-12mm scope;
H5), when flux-cored wire CO2 gas shielded welding torch runs to 6 positions, flux-cored wire axis and horizontal plane angle are between 75 °-85 °; While running to or 3 positions at 9, between 5 °-15 ° of flux-cored wire axis and horizontal plane angles; While running to horizontal level, flux-cored wire axis and horizontal plane angle are between 70 °-85 °; In the welding process of I, flux-cored wire CO2 gas shielded arc welding, each objective factor of welding is checked; The postwelding inspection of J, flux-cored wire CO2 gas shielded arc welding.
2. carbon steel tubing welding procedure as claimed in claim 1, it is characterized in that: in the a1 of steps A, selection tool is that to select argon-arc torch, the diameter of 75 ° be the cerium tungsten electrode of 40-50mm, length be 3-4m handgrip wire, diameter 2.0mm or 2.4mm, the tip of cerium tungsten electrode is processed as the truncated cone of 35 °-45 ° of taperings, and the axis of small circle of truncated cone is
0.8-1.0mm, the extension elongation of the porcelain mouth of the relative argon-arc torch of cerium tungsten electrode is 6-8mm; Select CO2/MAG semi-automatic arc welder and CO2 flowmeter, the ignition tip length that the front flux-cored wire of the starting the arc exposes CO2 gas shielded welding torch is 15-20mm.
Claims (2)
1. carbon steel tubing welding procedure, comprises the following steps:
Before A, weldering, prepare, comprise step by step following: a1) selection tool; A2) acceptance of instrument; A3) tubing rule and carry out dimensional gaughing; A4), to tubing cutting stock, ensure the perpendicularity of otch end face and tubing axis; A5) the otch end face finished edge of two tubing to need welding, the bevel angle sum that makes two tubing is 55 °-72 °, root face is 0.5-1mm; A6) by clean the eliminating impurities within the scope of groove surfaces externally and internally 20mm, expose metallic luster; B, two tubing that needs are welded are grouping, and comprise step by step following: b1) tooling fixture, point solid piece with tubing the material identical or identical group of confirmation group to use; B2) by two tubing horizontal group pair, 6 of the tubing hour positions group of locating is 3.2mm to gap, and ten two groups of locating are greater than 3.2mm to gap; C, two tubing carrying out to tack welding, comprise step by step following: c1) tack welding welding wire and the technique used is identical with formal weldering, and tack-weld will fuse in weld seam; C2) tubing is carried out to tack welding, tack welding solder joint should avoid tubing hour position three, six, nine, ten two points; C3) quality of inspection tack welding; C4) tack-weld two ends are polished into gentle slope type;
Before D, weldering, objective factor checks to external world;
E, handwork tungsten electrode argon arc backing welding;
In F, handwork tungsten electrode argon arc backing welding welding process, each objective factor of welding is checked;
The postwelding inspection of G, handwork tungsten electrode argon arc backing welding;
H, flux-cored wire CO2 gas shielded arc welding are filled capping, adopt DC reverse connection, and leftward welding, comprises step by step following:
H1) select suitable welding current, voltage, CO2 gas flow according to the wall thickness of carbon steel piping, material, welding wire melting falls into the mode in molten bath and selects short circuiting transfer;
H2) starting the arc in the groove of 10mm from welding position, the starting the arc should be avoided 6 positions;
H3) flux-cored wire CO2 gas shielded welding torch is along 6 point-tri-s' points-12 or the walking of six point-nine point-12, then along 6 point-nines' points-12 or the walking of six point-tri-point-12, so repeatedly, receives arc position at every turn and avoid ten two positions and stagger;
H4) flux-cored wire CO2 gas shielded arc welding adopts short arc welding, and evenly swings steadily and move, and speed of welding 6-15cm/min controls pool width in 5-12mm scope;
H5), when flux-cored wire CO2 gas shielded welding torch runs to 6 positions, flux-cored wire axis and horizontal plane angle are between 75 °-85 °; While running to or 3 positions at 9, between 5 °-15 ° of flux-cored wire axis and horizontal plane angles; While running to horizontal level, flux-cored wire axis and horizontal plane angle are between 70 °-85 °; In the welding process of I, flux-cored wire CO2 gas shielded arc welding, each objective factor of welding is checked; The postwelding inspection of J, flux-cored wire CO2 gas shielded arc welding.
2. carbon steel tubing welding procedure as claimed in claim 1, it is characterized in that: in the a1 of steps A, selection tool is that to select argon-arc torch, the diameter of 75 ° be the cerium tungsten electrode of 40-50mm, length be 3-4m handgrip wire, diameter 2.0mm or 2.4mm, the tip of cerium tungsten electrode is processed as the truncated cone of 35 °-45 ° of taperings, and the axis of small circle of truncated cone is
0.8-1.0mm, the extension elongation of the porcelain mouth of the relative argon-arc torch of cerium tungsten electrode is 6-8mm; Select CO2/MAG semi-automatic arc welder and CO2 flowmeter, the ignition tip length that the front flux-cored wire of the starting the arc exposes CO2 gas shielded welding torch is 15-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410569895.0A CN105583503A (en) | 2014-10-23 | 2014-10-23 | Carbon steel tube welding process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410569895.0A CN105583503A (en) | 2014-10-23 | 2014-10-23 | Carbon steel tube welding process |
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| CN105583503A true CN105583503A (en) | 2016-05-18 |
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| CN201410569895.0A Pending CN105583503A (en) | 2014-10-23 | 2014-10-23 | Carbon steel tube welding process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513940A (en) * | 2017-01-18 | 2017-03-22 | 中电环宇（北京）建设工程有限公司 | Novel method for welding process metal pipeline |
| CN106808060A (en) * | 2017-03-28 | 2017-06-09 | 凯盛重工有限公司 | A kind of process for ensureing vacuum coating cavity weld joint air-tight and intensity |
| CN106825877A (en) * | 2017-03-29 | 2017-06-13 | 于银强 | stainless steel square tube welding process |
| CN107584193A (en) * | 2017-06-21 | 2018-01-16 | 伊犁优创锅炉制造有限公司 | A kind of improved pressure vessel slab welding process |
| CN109434253A (en) * | 2018-07-29 | 2019-03-08 | 合肥市智信汽车科技有限公司 | A kind of method for welding exhaust tubes of railway transport vehicles |
| CN109530884A (en) * | 2018-11-21 | 2019-03-29 | 泰州口岸船舶有限公司 | One kind stays gap to wave welding method for stainless steel tube |
-
2014
- 2014-10-23 CN CN201410569895.0A patent/CN105583503A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513940A (en) * | 2017-01-18 | 2017-03-22 | 中电环宇（北京）建设工程有限公司 | Novel method for welding process metal pipeline |
| CN106513940B (en) * | 2017-01-18 | 2019-08-06 | 中电环宇（北京）建设工程有限公司 | A kind of novel process metal method for welding pipeline |
| CN106808060A (en) * | 2017-03-28 | 2017-06-09 | 凯盛重工有限公司 | A kind of process for ensureing vacuum coating cavity weld joint air-tight and intensity |
| CN106825877A (en) * | 2017-03-29 | 2017-06-13 | 于银强 | stainless steel square tube welding process |
| CN107584193A (en) * | 2017-06-21 | 2018-01-16 | 伊犁优创锅炉制造有限公司 | A kind of improved pressure vessel slab welding process |
| CN109434253A (en) * | 2018-07-29 | 2019-03-08 | 合肥市智信汽车科技有限公司 | A kind of method for welding exhaust tubes of railway transport vehicles |
| CN109530884A (en) * | 2018-11-21 | 2019-03-29 | 泰州口岸船舶有限公司 | One kind stays gap to wave welding method for stainless steel tube |
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Application publication date: 20160518 |
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