CN105364276A - Welding machining technology of high-strength-steel steel pipe tower - Google Patents
Welding machining technology of high-strength-steel steel pipe tower Download PDFInfo
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- CN105364276A CN105364276A CN201510722519.5A CN201510722519A CN105364276A CN 105364276 A CN105364276 A CN 105364276A CN 201510722519 A CN201510722519 A CN 201510722519A CN 105364276 A CN105364276 A CN 105364276A
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- welding
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Classifications
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- 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
-
- 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)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides a welding machining technology of a high-strength-steel steel pipe tower. Steel pipes with the groove gradient of 50 degrees to 60 degrees are selected, stress concentration and the influence of aeolian vibration are reduced through the inclined gradient, and negative effects are reduced to the minimum. Before welding, the welding surface is firstly cleaned, impurities are removed, and welding efficiency is improved; by means of secondary welding on the interiors and exteriors of the steel pipes, the overall firmness performance is improved, and the service life of the steel pipes is prolonged; wide adaptability is achieved, and cracks are not prone to being generated; and finishing treatment is carried out after welding, the overall surface is smoother and cleaner, and the needs of manufacturers can be met better.
Description
Technical field
The present invention relates to steel-pipe welding technical field, particularly relate to a kind of high-strength steel steel tube tower technique for welding.
Background technology
The development of steel pipe's production technology start from the manufacturing rise of bicycle, 19th century younger oil exploitation, the manufacture of naval vessel, boiler, aircraft during Two World Wars, the manufacture of apparatus of thermo-electric power boiler after World War II, the development of chemical industry and the drilling of petroleum gas and transport etc., all effectively promote the development of Steel Tube Industries on kind, seed output and quality.Steel pipe not only for carrying fluid and powdery solid, exchange heat energy, manufacturing machine part and container, it or a kind of economic steel.Building structure rack, pillar and machinery mount is manufactured with steel pipe, can weight reduction, save metal 20 ~ 40%, and batch production mechanized construction can be realized.Manufacture highway bridge with steel pipe not only can save steel, simplify construction, and the area of stopping off can be greatly reduced, investment reduction and maintenance cost.But existing steel pipe when welding due to process in early stage imperfection with weld not closely, after causing use, weld easily produces slight crack, has potential safety hazard, can not meet the demand of producer.
Summary of the invention
The object of this invention is to provide a kind of high-strength steel steel tube tower technique for welding, solve existing steel pipe when welding owing to processing imperfection early stage and welding not closely, after causing use, weld easily produces slight crack, there is potential safety hazard, can not meet the problem of the demand of producer.
Object of the present invention can be achieved through the following technical solutions;
A kind of high-strength steel steel tube tower technique for welding, its welding step is as follows:
(1) selected: to select steel pipe, the gradient of the groove of the steel pipe of required welding remains on 50-60 °;
(2) pretreatment: pretreatment is carried out to the groove of selected steel pipe, the dust of removing groove and iron filings, and polish the male and fomale(M&F) of groove, make the solder side of groove keep neatly smooth, overall concavo-convex error is no more than 0.5-1mm;
(3) splice: the steel pipe of required welding be linked in together between two and fix, making the gap between groove remain on 1-2mm;
(4) first time welding: be first welded in outside steel pipe and carry out first time submerged arc welding, the preheat temperature of submerged-arc welding is 330-360 DEG C, and speed of welding is 1-2m/min, welds 2-4 time back and forth;
(5) second time welding: enter steel duct after first time submerged arc welding and carry out second time submerged arc welding, the preheat temperature of submerged-arc welding is 250-330 DEG C, and speed of welding is 0.5-1m/min, welds 1-3 time back and forth;
(6) repair: the weld between the steel pipe that butt welding connects carries out grinding process, avoids weld uneven, makes the flatness error of weld be no more than 0.5-1mm, can obtain finished product.
Above-mentioned a kind of high-strength steel steel tube tower technique for welding, wherein, the welding rod that described submerged-arc welding adopts is the L-62 welding rod of 5mm.
The beneficial effect of this programme:
A kind of high-strength steel steel tube tower technique for welding provided by the invention, the groove gradient of selected steel pipe is the steel pipe of 50-60 °, utilize gradient to reduce the impact with institute's aeolian vibration of concentrating of stress, negative effect is dropped to minimum, first face of weld is cleared up before welding, remove foreign material, improve welding efficiency, by to secondary welding inside and outside steel pipe, promote overall firm performance, promote its service life, applicability is wide, be not easy output slight crack, finishing process is being carried out after welding, make integral planar more neatly smooth, more can meet the demand of producer.
Detailed description of the invention
Embodiment 1: a kind of high-strength steel steel tube tower technique for welding, its welding step is as follows:
(1) selected: to select steel pipe, the gradient of the groove of the steel pipe of required welding remains on 50 °;
(2) pretreatment: pretreatment is carried out to the groove of selected steel pipe, the dust of removing groove and iron filings, and polish the male and fomale(M&F) of groove, make the solder side of groove keep neatly smooth, overall concavo-convex error is no more than 0.5mm;
(3) splice: the steel pipe of required welding be linked in together between two and fix, making the gap between groove remain on 1mm;
(4) first time welding: be first welded in outside steel pipe and carry out first time submerged arc welding, the preheat temperature of submerged-arc welding is 330 DEG C, and speed of welding is 1m/min, welds 2 times back and forth;
(5) second time welding: enter steel duct after first time submerged arc welding and carry out second time submerged arc welding, the preheat temperature of submerged-arc welding is 250 DEG C, and speed of welding is 0.5m/min, welds 1 time back and forth;
(6) repair: the weld between the steel pipe that butt welding connects carries out grinding process, avoids weld uneven, makes the flatness error of weld be no more than 0.5mm, can obtain finished product.
Embodiment 2: a kind of high-strength steel steel tube tower technique for welding, its welding step is as follows:
(1) selected: to select steel pipe, the gradient of the groove of the steel pipe of required welding remains on 55 °;
(2) pretreatment: pretreatment is carried out to the groove of selected steel pipe, the dust of removing groove and iron filings, and polish the male and fomale(M&F) of groove, make the solder side of groove keep neatly smooth, overall concavo-convex error is no more than 0.8mm;
(3) splice: the steel pipe of required welding be linked in together between two and fix, making the gap between groove remain on 1.5mm;
(4) first time welding: be first welded in outside steel pipe and carry out first time submerged arc welding, the preheat temperature of submerged-arc welding is 340 DEG C, and speed of welding is 1.5m/min, welds 3 times back and forth;
(5) second time welding: enter steel duct after first time submerged arc welding and carry out second time submerged arc welding, the preheat temperature of submerged-arc welding is 300 DEG C, and speed of welding is 0.8m/min, welds 2 times back and forth;
(6) repair: the weld between the steel pipe that butt welding connects carries out grinding process, avoids weld uneven, makes the flatness error of weld be no more than 0.7mm, can obtain finished product.
Embodiment 3: a kind of high-strength steel steel tube tower technique for welding, its welding step is as follows:
(1) selected: to select steel pipe, the gradient of the groove of the steel pipe of required welding remains on 60 °;
(2) pretreatment: pretreatment is carried out to the groove of selected steel pipe, the dust of removing groove and iron filings, and polish the male and fomale(M&F) of groove, make the solder side of groove keep neatly smooth, overall concavo-convex error is no more than 1mm;
(3) splice: the steel pipe of required welding be linked in together between two and fix, making the gap between groove remain on 2mm;
(4) first time welding: be first welded in outside steel pipe and carry out first time submerged arc welding, the preheat temperature of submerged-arc welding is 360 DEG C, and speed of welding is 2m/min, welds 4 times back and forth;
(5) second time welding: enter steel duct after first time submerged arc welding and carry out second time submerged arc welding, the preheat temperature of submerged-arc welding is 330 DEG C, and speed of welding is 1m/min, welds 3 times back and forth;
(6) repair: the weld between the steel pipe that butt welding connects carries out grinding process, avoids weld uneven, makes the flatness error of weld be no more than 1mm, can obtain finished product.
Above-mentioned a kind of high-strength steel steel tube tower technique for welding, wherein, the welding rod that described submerged-arc welding adopts is the L-62 welding rod of 5mm.
A kind of high-strength steel steel tube tower technique for welding provided by the invention, the groove gradient of selected steel pipe is the steel pipe of 50-60 °, utilize gradient to reduce the impact with institute's aeolian vibration of concentrating of stress, negative effect is dropped to minimum, first face of weld is cleared up before welding, remove foreign material, improve welding efficiency, by to secondary welding inside and outside steel pipe, promote overall firm performance, promote its service life, applicability is wide, be not easy output slight crack, finishing process is being carried out after welding, make integral planar more neatly smooth, more can meet the demand of producer.
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (2)
1. a high-strength steel steel tube tower technique for welding, is characterized by, and its welding step is as follows:
(1) selected: to select steel pipe, the gradient of the groove of the steel pipe of required welding remains on 50-60 °;
(2) pretreatment: pretreatment is carried out to the groove of selected steel pipe, the dust of removing groove and iron filings, and polish the male and fomale(M&F) of groove, make the solder side of groove keep neatly smooth, overall concavo-convex error is no more than 0.5-1mm;
(3) splice: the steel pipe of required welding be linked in together between two and fix, making the gap between groove remain on 1-2mm;
(4) first time welding: be first welded in outside steel pipe and carry out first time submerged arc welding, the preheat temperature of submerged-arc welding is 330-360 DEG C, and speed of welding is 1-2m/min, welds 2-4 time back and forth;
(5) second time welding: enter steel duct after first time submerged arc welding and carry out second time submerged arc welding, the preheat temperature of submerged-arc welding is 250-330 DEG C, and speed of welding is 0.5-1m/min, welds 1-3 time back and forth;
(6) repair: the weld between the steel pipe that butt welding connects carries out grinding process, avoids weld uneven, makes the flatness error of weld be no more than 0.5-1mm, can obtain finished product.
2. a kind of high-strength steel steel tube tower technique for welding as claimed in claim 1, is characterized by, and the welding rod that described submerged-arc welding adopts is the L-62 welding rod of 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510722519.5A CN105364276A (en) | 2015-10-31 | 2015-10-31 | Welding machining technology of high-strength-steel steel pipe tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510722519.5A CN105364276A (en) | 2015-10-31 | 2015-10-31 | Welding machining technology of high-strength-steel steel pipe tower |
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| CN105364276A true CN105364276A (en) | 2016-03-02 |
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| CN201510722519.5A Pending CN105364276A (en) | 2015-10-31 | 2015-10-31 | Welding machining technology of high-strength-steel steel pipe tower |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583976A (en) * | 2016-12-22 | 2017-04-26 | 广州永大不锈钢有限公司 | Internal strengthening welding technology of stainless steel tube |
| CN108563870A (en) * | 2018-04-16 | 2018-09-21 | 中国电力工程顾问集团中南电力设计院有限公司 | The computational methods of steel tube tower rod piece aeolian vibration fatigue life |
| 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 |
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| CN101108448A (en) * | 2006-07-18 | 2008-01-23 | 中信重型机械公司 | Technique for ensuring axiality of mammoth converter support ring trunnion |
| CN101259562A (en) * | 2008-03-20 | 2008-09-10 | 浙江盛达铁塔有限公司 | Welding technique for rolled steel |
| CN101683701A (en) * | 2008-09-27 | 2010-03-31 | 中国海洋石油总公司 | Welding technique of submerged arc welding of mechanical controlled rolling and controlled cooling structural steel |
| CN101700600A (en) * | 2009-11-19 | 2010-05-05 | 河南第一火电建设公司 | Welding process method of novel Q460 steel for transmission tower |
| CN101850460A (en) * | 2010-05-21 | 2010-10-06 | 中国石化集团第五建设公司 | Welding process of 12Cr1MoV high-pressure pipeline CO2 semiautomatic or automatic gas shielded welding |
| CN102886593A (en) * | 2012-10-17 | 2013-01-23 | 山东电力集团公司电力科学研究院 | Welding method for Q460 high-strength steel tube of extra-high-voltage power transmission steel tube tower |
| CN104985305A (en) * | 2015-06-23 | 2015-10-21 | 广州增立钢管结构股份有限公司 | Improved steel tube and hubbed flange butt joint submerged arc welding method |
-
2015
- 2015-10-31 CN CN201510722519.5A patent/CN105364276A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108448A (en) * | 2006-07-18 | 2008-01-23 | 中信重型机械公司 | Technique for ensuring axiality of mammoth converter support ring trunnion |
| CN101259562A (en) * | 2008-03-20 | 2008-09-10 | 浙江盛达铁塔有限公司 | Welding technique for rolled steel |
| CN101683701A (en) * | 2008-09-27 | 2010-03-31 | 中国海洋石油总公司 | Welding technique of submerged arc welding of mechanical controlled rolling and controlled cooling structural steel |
| CN101700600A (en) * | 2009-11-19 | 2010-05-05 | 河南第一火电建设公司 | Welding process method of novel Q460 steel for transmission tower |
| CN101850460A (en) * | 2010-05-21 | 2010-10-06 | 中国石化集团第五建设公司 | Welding process of 12Cr1MoV high-pressure pipeline CO2 semiautomatic or automatic gas shielded welding |
| CN102886593A (en) * | 2012-10-17 | 2013-01-23 | 山东电力集团公司电力科学研究院 | Welding method for Q460 high-strength steel tube of extra-high-voltage power transmission steel tube tower |
| CN104985305A (en) * | 2015-06-23 | 2015-10-21 | 广州增立钢管结构股份有限公司 | Improved steel tube and hubbed flange butt joint submerged arc welding method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583976A (en) * | 2016-12-22 | 2017-04-26 | 广州永大不锈钢有限公司 | Internal strengthening welding technology of stainless steel tube |
| CN108563870A (en) * | 2018-04-16 | 2018-09-21 | 中国电力工程顾问集团中南电力设计院有限公司 | The computational methods of steel tube tower rod piece aeolian vibration fatigue life |
| 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 |
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Application publication date: 20160302 |