CN105855671A - Butting process of large-diameter rolled steel pipe for building structure - Google Patents
Butting process of large-diameter rolled steel pipe for building structure Download PDFInfo
- Publication number
- CN105855671A CN105855671A CN201610410787.8A CN201610410787A CN105855671A CN 105855671 A CN105855671 A CN 105855671A CN 201610410787 A CN201610410787 A CN 201610410787A CN 105855671 A CN105855671 A CN 105855671A
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- China
- Prior art keywords
- welding
- steel pipe
- weld
- voltage
- butting
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- Legal status (The legal status 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 status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
- B23K9/188—Submerged-arc welding making use of a consumable electrodes making use of several electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
- B23K9/1735—Arc welding or cutting making use of shielding gas and of a consumable electrode making use of several electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a butting process of a large-diameter rolled steel pipe for a building structure, comprising the following steps: (1), fattening pipe ends; (2), chamfering the pipe ends: chamfering to obtain dull edges 7-9 mm in size through a chamfering apparatus and a groove angle 22-25 degrees, and butting pipe segments to form a Y-shaped groove; (3), butting steel pipes; (4), pre-welding: applying mixed gas shielded welding and gas shielded welding wires, a gas being 80% of Ar and 20% of CO2, current being 140-160 A, voltage being 25-27 V and welding speed being 0.5-0.6 m/min; (5) welding inside and outside: carrying submerged arc welding for inside prior to outside, both using four-wire submerged arc auto-welding, and wires being 3.5-4.0 mm in diameter, welding speed being 1.0-1.2 m/min; (6), grinding for redundant height of a weld; (7), carrying circumferential weld UT detection; (8), carrying X-ray detection. The butting process of the rolled steel pipe enables greatly improved butting quality and efficiency of the steel pipe and reduced cost and can guarantee good appearance quality.
Description
Technical field
The present invention relates to a kind of building structure heavy caliber and roll the butt-joint process of steel pipe, belong to steel pipe manufacture processing
Technical field.
Background technology
Rolling steel pipe is to be welded in the gap that steel plate carries out the docking of helical buckling tailing edge steel plate by certain curvature
Making together, the advantage rolling steel pipe is low cost, and production efficiency is fast, it is wide in variety to produce.Building structure is used
Steel pipe usually needs various length, rolls steel pipe at present and limits or other reasons due to production equipment, will necessarily
Producing pup joint, and welding mostly is monofilament submerged-arc welding at present, the steel pipe for overlength need to dock after producing, but mesh
Front butt-joint process is inefficient, and joint quality is low, and cost is very big, and after steel pipe docking, the weldering of formation
Seam is higher than tube surfaces, and outward appearance physical dimension, flatness are low, cause presentation quality low.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of building structure heavy caliber rolls steel pipe
Butt-joint process, substantially increase joint quality and the efficiency of steel pipe, reduce cost, and can guarantee that good
Presentation quality.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of building structure heavy caliber rolls the butt-joint process of steel pipe, comprises the following steps:
(1) pipe end leveling: treat docking steel pipe and carry out end full circle；
(2) pipe end chamfered edge: pour out root face a size of 7-9mm by chamfering device, bevel angle is 22-25
Degree, forms Y type groove after pipeline section docking；
(3) steel pipe docking；
(4) prewelding: using mixed gas arc welding and gas shield welding wire, gas is 80%Ar+20%CO2, its electricity
Stream is 140-160A, and voltage is 25-27V, and speed of welding is 0.5-0.6m/min；
(5) interior outside weld: submerged arc welding outer after in carrying out first, interior outside weld all uses four Lincoln welds to enter
Row welding, gage of wire is 3.5-4.0mm, and speed of welding is 1.0-1.2m/min；
(6) weld reinforcement grinding: use weld reinforcement milling drum butt welded seam reinforcement to carry out grinding leveling.
(7) circumferential weld UT flaw detection；
(8) x-ray inspection.
Described inside and outside welder's sequence all uses four Lincoln welds to weld, and first is DC reverse connection, electricity
Stream is 1050-1150A, and voltage is 30-33V；Second is exchange, and electric current is 850-950A, and voltage is
32-34V；3rd is exchange, and electric current is 650-750A, and voltage is 38-40V；4th is exchange, electricity
Stream is 550-650A, and voltage is 40-42V.
Compared with the prior art, beneficial effects of the present invention is as follows:
The building structure heavy caliber of the present invention rolls the butt-joint process of steel pipe, substantially increases the docking matter of steel pipe
Amount and efficiency, reduce cost, and can guarantee that good presentation quality；Pipe end slope-mouth in the present invention ensures weldering
In termination process can through welding, and improve speed of welding, improve seam center, reduce sealing wire ability, reduce weldering
Connect heat input to welding heat affected zone tissue and the impact of performance, the performance of raising weld heat-affected zone；After docking
Prewelding effectively reduces heat input and ensures the straight degree of docking steel pipe to reduce welding deformation amount；Interior outside weld all uses four
Silk Lincoln weld is welded, it is ensured that good presentation quality, it is ensured that weld seam stabilizing welding quality and work effect
Rate, substantially increases the docking efficiency of steel pipe；Carry out welding reinforcement grinding equating at inside and outside postwelding to process, it is possible to
Ensureing that the commissure of steel pipe is smooth, presentation quality is good.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated, but the present invention is not limited only to these embodiments,
On the premise of without departing from present inventive concept, within any improvement made all falls within protection scope of the present invention.
Embodiment 1:
A kind of building structure heavy caliber rolls the butt-joint process of steel pipe, comprises the following steps:
(1) pipe end leveling: treat docking steel pipe and carry out end full circle；
(2) pipe end chamfered edge: pour out root face a size of 7-9mm by chamfering device, bevel angle is 22-25
Degree, forms Y type groove after pipeline section docking；
(3) steel pipe docking；
(4) prewelding: using mixed gas arc welding and gas shield welding wire, gas is 80%Ar+20%CO2, its electricity
Stream is 140-160A, and voltage is 25-27V, and speed of welding is 0.5-0.6m/min；
(5) interior outside weld: submerged arc welding outer after in carrying out first, interior outside weld all uses four Lincoln welds to enter
Row welding, gage of wire is 3.5-4.0mm, and speed of welding is 1.0-1.2m/min；Described inside and outside welder's sequence
All using four Lincoln welds to weld, first is DC reverse connection, and electric current is 1050-1150A, electricity
Pressure is 30-33V；Second is exchange, and electric current is 850-950A, and voltage is 32-34V；3rd is exchange,
Electric current is 650-750A, and voltage is 38-40V；4th is exchange, and electric current is 550-650A, and voltage is
40-42V。
(6) weld reinforcement grinding: use weld reinforcement milling drum butt welded seam reinforcement to carry out grinding leveling.
(7) circumferential weld UT flaw detection；
(8) x-ray inspection.
The building structure heavy caliber of the present invention rolls the butt-joint process of steel pipe, substantially increases the docking matter of steel pipe
Amount and efficiency, reduce cost, and can guarantee that good presentation quality；Pipe end slope-mouth in the present invention ensures weldering
In termination process can through welding, and improve speed of welding, improve seam center, reduce sealing wire ability, reduce weldering
Connect heat input to welding heat affected zone tissue and the impact of performance, the performance of raising weld heat-affected zone；After docking
Prewelding effectively reduces heat input and ensures the straight degree of docking steel pipe to reduce welding deformation amount；Interior outside weld all uses four
Silk Lincoln weld is welded, it is ensured that good presentation quality, it is ensured that weld seam stabilizing welding quality and work effect
Rate, substantially increases the docking efficiency of steel pipe；Carry out welding reinforcement grinding equating at inside and outside postwelding to process, it is possible to
Ensureing that the commissure of steel pipe is smooth, presentation quality is good.
Claims (2)
1. a building structure heavy caliber rolls the butt-joint process of steel pipe, it is characterised in that: include following step
Rapid:
(1) pipe end leveling: treat docking steel pipe and carry out end full circle；
(2) pipe end chamfered edge: pour out root face a size of 7-9mm by chamfering device, bevel angle is 22-25
Degree, forms Y type groove after pipeline section docking；
(3) steel pipe docking；
(4) prewelding: using mixed gas arc welding and gas shield welding wire, gas is 80%Ar+20%CO2, its electricity
Stream is 140-160A, and voltage is 25-27V, and speed of welding is 0.5-0.6m/min；
(5) interior outside weld: submerged arc welding outer after in carrying out first, interior outside weld all uses four Lincoln welds to enter
Row welding, gage of wire is 3.5-4.0mm, and speed of welding is 1.0-1.2m/min；
(6) weld reinforcement grinding: use weld reinforcement milling drum butt welded seam reinforcement to carry out grinding leveling；
(7) circumferential weld UT flaw detection；
(8) x-ray inspection.
Building structure heavy caliber the most according to claim 1 rolls the butt-joint process of steel pipe, its feature
Being: described inside and outside welder's sequence all uses four Lincoln welds to weld, first is DC reverse connection,
Electric current is 1050-1150A, and voltage is 30-33V；Second is exchange, and electric current is 850-950A, and voltage is
32-34V；3rd is exchange, and electric current is 650-750A, and voltage is 38-40V；4th is exchange, electricity
Stream is 550-650A, and voltage is 40-42V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410787.8A CN105855671A (en) | 2016-06-03 | 2016-06-03 | Butting process of large-diameter rolled steel pipe for building structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410787.8A CN105855671A (en) | 2016-06-03 | 2016-06-03 | Butting process of large-diameter rolled steel pipe for building structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105855671A true CN105855671A (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610410787.8A Pending CN105855671A (en) | 2016-06-03 | 2016-06-03 | Butting process of large-diameter rolled steel pipe for building structure |
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| CN (1) | CN105855671A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110722279A (en) * | 2019-09-11 | 2020-01-24 | 珠海东方重工有限公司 | Steel pipe butt welding process |
| CN111570977A (en) * | 2020-05-26 | 2020-08-25 | 中国水利水电第九工程局有限公司 | Butt welding connection method for building supporting circular tube steel column |
| CN113385787A (en) * | 2021-05-06 | 2021-09-14 | 江苏鼎嘉机械设备科技有限公司 | Submerged-arc welding process for small-diameter tank body |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008999A (en) * | 2012-12-17 | 2013-04-03 | 华油钢管有限公司 | Spiral seam submerged-arc welded pipe butt joint process |
| CN103433604A (en) * | 2013-08-20 | 2013-12-11 | 首钢总公司 | Multiple-wire submerged-arc welding technology for guaranteeing subsea pipeline steel pipe connector comprehensive performance |
| CN104475941A (en) * | 2014-12-03 | 2015-04-01 | 宝鸡石油钢管有限责任公司 | Multiple-wire submerged arc welding process suitable for thick-wall straight-seam steel pipes X70 |
| CN104511720A (en) * | 2013-09-27 | 2015-04-15 | 中国石油天然气集团公司 | Reducing production method of deepwater submerged arc welding large-caliber steel pipes |
-
2016
- 2016-06-03 CN CN201610410787.8A patent/CN105855671A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008999A (en) * | 2012-12-17 | 2013-04-03 | 华油钢管有限公司 | Spiral seam submerged-arc welded pipe butt joint process |
| CN103433604A (en) * | 2013-08-20 | 2013-12-11 | 首钢总公司 | Multiple-wire submerged-arc welding technology for guaranteeing subsea pipeline steel pipe connector comprehensive performance |
| CN104511720A (en) * | 2013-09-27 | 2015-04-15 | 中国石油天然气集团公司 | Reducing production method of deepwater submerged arc welding large-caliber steel pipes |
| CN104475941A (en) * | 2014-12-03 | 2015-04-01 | 宝鸡石油钢管有限责任公司 | Multiple-wire submerged arc welding process suitable for thick-wall straight-seam steel pipes X70 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110722279A (en) * | 2019-09-11 | 2020-01-24 | 珠海东方重工有限公司 | Steel pipe butt welding process |
| CN111570977A (en) * | 2020-05-26 | 2020-08-25 | 中国水利水电第九工程局有限公司 | Butt welding connection method for building supporting circular tube steel column |
| CN113385787A (en) * | 2021-05-06 | 2021-09-14 | 江苏鼎嘉机械设备科技有限公司 | Submerged-arc welding process for small-diameter tank body |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160817 |
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| RJ01 | Rejection of invention patent application after publication |