CN102922105A - Semi-automatic welding process for self-shielded flux-cored wire - Google Patents
Semi-automatic welding process for self-shielded flux-cored wire Download PDFInfo
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- CN102922105A CN102922105A CN2012104615025A CN201210461502A CN102922105A CN 102922105 A CN102922105 A CN 102922105A CN 2012104615025 A CN2012104615025 A CN 2012104615025A CN 201210461502 A CN201210461502 A CN 201210461502A CN 102922105 A CN102922105 A CN 102922105A
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Abstract
The invention provides a semi-automatic welding process of a self-shielded flux-cored wire, which comprises the site operation processes of groove processing, preheating in advance, pipe orifice grouping, preheating, internal welding machine root welding, self-shielded flux-cored wire hot welding, level filling and cosmetic welding till a welding surface is level. The semi-automatic welding process has the benefit that under the condition of the same welding equipment and personnel, the labor efficiency is greatly improved and the qualified rate is improved.
Description
Technical field
The present invention relates to pipeline Construction of Long-distance Pipelines technical field, relate in particular to a kind of self-protection flux-cored wire semiautomatic welding technique.
Background technology
In engineering in pipeline; cellulose type electrode arc welding root bead+self-protection flux-cored wire semiautomatic welding is filled, cover welding technique, and namely the SMAW+FCAW-S welding procedure is present domestic and international welding heavy caliber (the leading welding procedure of long distance pipeline of Φ 〉=813mm).During this welding procedure job site welding in the open air heavy caliber long distance pipeline, usually adopt " welding unit continuous productive process " welding procedure mode, adopt the tubing of material X70, caliber Φ 1067mm (42 inches), wall thickness 15.9mm when extraneous pipeline, adopt the SMAW+FCAW-S welding procedure, how increasing substantially semiautomatic welding unit day welding large-bore pipe ring welded seam quantity is a problem that is worth research.
Summary of the invention
In order to overcome the problem of prior art, the invention provides a kind of self-protection flux-cored wire semiautomatic welding technique, it has improved operating efficiency, has saved cost.
Technical scheme of the present invention is: a kind of self-protection flux-cored wire semiautomatic welding technique; it is characterized in that this process using groove processing; from the welding machine root bead; self-insurance flux-cored wire semiautomatic welding is filled; cover welding technique; its execute-in-place program is: groove processing; in advance preheating; the mouth of pipe is formed a team; preheating; the internal welding machine root bead; the core hot weld of self-insurance medicine and aspect are filled; cosmetic welding; until solder side is smooth; groove adds the heavy caliber beveling machine line up gap turning that man-hour, the much knives tool was equipped with in employing; make it to become loading little; do not affect again quality, benefit again the groove type of safe construction.
The invention has the beneficial effects as follows: under identical welding equipment, staff condition, increase substantially efficiency, improve qualification rate.
The specific embodiment
A kind of self-protection flux-cored wire semiautomatic welding technique; it is characterized in that the processing of this process using groove, from welding machine root bead, self-insurance flux-cored wire semiautomatic welding fill, cover welding technique; its execute-in-place program is: groove processing, in advance preheating, the mouth of pipe are formed a team, preheating, internal welding machine root bead, the core hot weld of self-insurance medicine and aspect is filled, cosmetic welding; until solder side is smooth; groove adds the heavy caliber beveling machine line up gap turning that man-hour, the much knives tool was equipped with in employing; make it to become loading little; do not affect again quality, benefit again the groove type of safe construction.
Embodiment.Have drawn from Kazakhstan natural gas line of this example adopts the test situation of IWM+FCAW-S technique.
Kazakhstan's natural gas line adopts X70, Φ 1067mm (42 inches), wall thickness 15.9mm steel pipe, and API1101-2005 version standard is carried out in the welding evaluation.Adopt groove design processing, internal welding machine carries out the low hydrogen type welding procedure welding of root bead+self-protection flux-cored wire semiautomatic welding filling, cosmetic welding.
(1) shape of groove: groove adopts beveling machine processing at the construction field (site), internal groove α=37.5 °, height h=1.27mm; Root face=b1.8mm, arc radius R=3.2mm; Outer bevel angle β=10 °, tangent with circular arc; Groove at the construction field (site); Adopt internal welding machine (function that internal clamp is arranged in the internal welding machine) group right, group is to gap c=0.02mm; Mouth of pipe unfitness of butt joint m≤2.5mm; IWM+FCAW welding procedure groove section is long-pending to be 109mm
2
(2) welding equipment: the equipment of internal welding machine+semiautomatic welding process using is Φ 1067mm (42 inches) CRC internal welding machine, Lincoln DC-400 dc source and wire-feed motor LN-23P.
(3) welding condition and ray detection, mechanical property test result: preheating, interlayer temperature 〉=60 °.Root bead adopts solid core welding wire Bole Di Sen TS-6 (AWSA5.18ER70S-G) Φ 0.9mm, silk fast 94-96cm/min (electric current 205-215A), weld fast 78cm/min, rich argon (75%+25%CD2) gas flow 25-30I/min, voltage 22-23V; Capping is filled in hot weld, adopts son protection flux-cored wire 80ksi grade welding wire, Φ 2.0mm; Hot weld silk speed is at 280cm/min (electric current 210-250A), and voltage 20-25V welds fast 20-25cm/min; Fill capping silk speed at 250-275cm/min (190-250A), voltage 18-22V.Weld fast 17-25cm/min.
Operational procedure:
Be divided into groove and process, shift to an earlier date preheating, group line up, preheating, internal welding machine root bead, FCAW hot weld, FCAW filling 1, FCAW filling 2, FCAW filling 3, FCAW filling 4, FCAW capping.
The crew:
Add up to 65 people; Wherein: machine group leader 2 people, HSE person 1 people, technician 1 people, quality person 1 people, plumber 3 people, groove worker 3 people, internal welding machine operative employee 3 people, FCAW welder 22 people, special vehicle operating personnel 10 people such as sideboom tractor excavator mobile welding workshop, electric machinery maintenance personal 2 people, general worker 10 people, logistics and driver 7 people.
The unit capital equipment:
Groove processing: 1 of 20 tons of sideboom tractor, 1 of pipeline beveling machine;
Group line up: 2 of 1,40 tons sideboom tractors of 1,70 tons sideboom tractors of excavator;
Welding equipment: 1 of internal welding machine, 1 of 100KW mobile welding workshop, 11 of 80KW mobile welding workshops, 26 of Lincoln DC-400 welding machines, 44 of Lincoln LN-23P wire-feed motor.
Quality and progress:
From on February 28th, 1 2009 on August 8th, 2008, Kazakhstan " SMAW+FCAW-S " unit adds up 110 of effective work days, and accumulative total is welded 3410 road junctions, and one time the ray detection qualification rate is 95.7%; Each work day is on average at 31 road girth joints.
Claims (2)
1. self-protection flux-cored wire semiautomatic welding technique; it is characterized in that the processing of this process using groove, from welding machine root bead, self-insurance flux-cored wire semiautomatic welding fill, cover welding technique; its execute-in-place program is: groove processing, in advance preheating, the mouth of pipe are formed a team, preheating, internal welding machine root bead, the core hot weld of self-insurance medicine and aspect is filled, cosmetic welding, until solder side is smooth.
2. described self-protection flux-cored wire semiautomatic welding technique according to claim 1 is characterized in that described groove adds to adopt the heavy caliber beveling machine line up gap turning that the much knives tool is housed man-hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104615025A CN102922105A (en) | 2012-11-16 | 2012-11-16 | Semi-automatic welding process for self-shielded flux-cored wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104615025A CN102922105A (en) | 2012-11-16 | 2012-11-16 | Semi-automatic welding process for self-shielded flux-cored wire |
Publications (1)
| Publication Number | Publication Date |
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| CN102922105A true CN102922105A (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104615025A Pending CN102922105A (en) | 2012-11-16 | 2012-11-16 | Semi-automatic welding process for self-shielded flux-cored wire |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100811920B1 (en) * | 2007-02-07 | 2008-03-10 | 대우조선해양 주식회사 | One side welding method of butt-welded joints |
| CN101417364A (en) * | 2008-11-20 | 2009-04-29 | 新疆石油工程建设有限责任公司 | Semi-automatic welding method of metal flux cored filler rod conduit root |
| CN101850454A (en) * | 2009-03-31 | 2010-10-06 | 中国石油天然气管道局 | Welding process of heavy-calibre long-distance steel pipeline |
| CN102581428A (en) * | 2012-02-22 | 2012-07-18 | 象王重工股份有限公司 | Ultra-thick forge piece and thin plate butt welding process |
| CN102615395A (en) * | 2012-04-27 | 2012-08-01 | 中国石油天然气集团公司 | Method for welding single-arc double-wire pipelines |
-
2012
- 2012-11-16 CN CN2012104615025A patent/CN102922105A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100811920B1 (en) * | 2007-02-07 | 2008-03-10 | 대우조선해양 주식회사 | One side welding method of butt-welded joints |
| CN101417364A (en) * | 2008-11-20 | 2009-04-29 | 新疆石油工程建设有限责任公司 | Semi-automatic welding method of metal flux cored filler rod conduit root |
| CN101850454A (en) * | 2009-03-31 | 2010-10-06 | 中国石油天然气管道局 | Welding process of heavy-calibre long-distance steel pipeline |
| CN102581428A (en) * | 2012-02-22 | 2012-07-18 | 象王重工股份有限公司 | Ultra-thick forge piece and thin plate butt welding process |
| CN102615395A (en) * | 2012-04-27 | 2012-08-01 | 中国石油天然气集团公司 | Method for welding single-arc double-wire pipelines |
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Application publication date: 20130213 |