CN103862133A - Boiler barrel welding method - Google Patents
Boiler barrel welding method Download PDFInfo
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- CN103862133A CN103862133A CN201410138525.1A CN201410138525A CN103862133A CN 103862133 A CN103862133 A CN 103862133A CN 201410138525 A CN201410138525 A CN 201410138525A CN 103862133 A CN103862133 A CN 103862133A
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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
- B23K9/013—Arc cutting, gouging, scarfing or desurfacing
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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
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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
- B23K9/235—Preliminary treatment
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- Plasma & Fusion (AREA)
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- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a method used for welding a boiler barrel, in particular to a boiler barrel welding method in order to solve the problem that due to the fact that in existing boiler barrel welding, X-ray flaw detection is adopted after welding, the back repair rate is high. According to the first scheme, the boiler barrel welding method comprises the steps that 1 the plate thickness of a first welded barrel section is 26 mm-28 mm and grooves are formed in the inner side of a butt-joint opening position and the outer side of the butt-joint opening position respectively; 2 butt joint positions are aligned tightly; 3 spot welding is conducted on the outer side; 4 full-length butt welding is conducted on the inner side; 5 back gouging is conducted on the outer side by the adoption of a carbon arc gouging welding machine; 6 full-length welding is conducted on the outer side, and weld seams are removed through grinding after welding is completed. According to the second scheme; 1 the plate thickness of a second welded barrel section is 16 mm-24 mm, and a groove is formed on the inner side; 2 butt joint positions are aligned tightly; 3 spot welding is conducted on the outer side; 4 full-length welding is conducted on a butt-joint opening of the inner side through automatic submerged arc welding. According to the third scheme; 1 the plate thickness of a third welded barrel section is 8 mm-14 mm, and the position of a butt-joint opening is ground to be neat; 2 butt joint positions are aligned tightly; 3 a coal firing weld bead is welded; 4 full-length welding is conducted on the inner side; 5 back gouging is conducted on weld seams by the adoption of the carbon arc gouging welding machine on the outer side.
Description
Technical field
The present invention relates to a kind of method for boiler barrel welding.
Background technology
Existing boiler barrel is for different wall thickness, and the welding method of taking is also different; The cylindrical shell that is 26mm～28mm for wall thickness, before welding, be opening one side groove, owing to being slab, easily cause postwelding pore many in a side welding, cannot repair, the cylindrical shell that is 16mm～24mm for wall thickness, before welding, is that square groove directly welds, welding also easily causes postwelding pore many like this, cannot repair; The cylindrical shell that is 8mm～14mm for wall thickness, before welding, is that square groove directly welds, and not preheating of welding bead before weldering, and welding also easily causes postwelding pore many like this, cannot repair; Above-mentioned three kinds of method postweldings need adopt x-ray detection, and the result after flaw detection exists the problem that repair rate is high, has had a strong impact on manufacturing schedule.
Summary of the invention
The present invention adopts x-ray detection after solving existing boiler barrel welding, has the problem that repair rate is high, and a kind of drum welding method is provided.
Scheme one: a kind of drum welding method realizes by following steps: the thickness of slab of step 1, the first welded shell ring 1 is 26mm～28mm, at the equal bevel in inner side and outside at the first welded shell ring counterpart place, 30 ° of inner side grooves, 45 ° of outside grooves, the first root face between inner side groove and outside groove is 4mm～5mm, all polishes and clean out in the both sides of the both sides of inner side groove and outside groove; Step 2, roll the first welded shell ring, joint is not to sternly there being gap; Step 3, adopt gas shielded arc welding to carry out counterpart spot welding in outside to the roll first welded shell ring, spot welding length is 20mm～40mm; Step 4, adopt Lincoln weld to carry out full weld to counterpart inside the first welded shell ring, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, and postwelding is clean by weld grinding; Step 5, adopt carbon arc air gouging welding machine butt welded seam to carry out back chipping in the outside of the first welded shell ring, φ 8mm carbon-point for carbon plane, finds that pore welds repair welding pore by hand; Step 6, adopt Lincoln weld to carry out counterpart full weld to the first welded shell ring outside, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, postwelding is clean by weld grinding, so far, the first shell ring has welded.
Scheme two: a kind of drum welding method realizes by following steps: the thickness of slab of step 1, the second welded shell ring is 16mm～24mm, at the inner side bevel at the second welded shell ring counterpart place, 30 ° of inner side grooves, the second root face between inner side groove and outside end face is 4mm～5mm, and the polishing of groove both sides is cleaned out; Step 2, roll the second welded shell ring, joint is not to sternly there being gap; Step 3, adopt gas shielded arc welding to carry out counterpart spot welding in outside to the roll second welded shell ring, spot welding length is 20mm～40mm; Step 4, adopt Lincoln weld to carry out full weld to counterpart inside the second welded shell ring, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, postwelding is clean by weld grinding, so far, the second shell ring has welded.
Scheme three: a kind of drum welding method realizes by following steps: the thickness of slab of step 1, the 3rd welded shell ring is 8mm～14mm, by clean the polishing of the 3rd welded shell ring counterpart place; Step 2, roll the 3rd welded shell ring, joint is not to sternly there being gap; Before step 3, welding, first fire is baked welding bead, by 50 ℃～80 ℃ of welding bead heating; Step 4, adopt Lincoln weld to carry out full weld to counterpart inside the 3rd welded shell ring, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, and postwelding is clean by weld grinding; Step 5, adopt carbon arc air gouging welding machine butt welded seam to carry out back chipping in the outside of the 3rd welded shell ring, φ 8mm carbon-point for carbon plane, finds that pore welds repair welding pore by hand, and postwelding is clean by weld grinding, and so far, the 3rd shell ring has welded.
The present invention compared with prior art has following beneficial effect:
The present invention is directed to the different cylindrical shell of wall thickness and adopt distinct methods, the cylindrical shell that is 26mm～28mm for wall thickness, before welding, double open groove adopts carbon arc air gouging welding machine butt welded seam to carry out back chipping before outside, finds pore repair welding pore at any time; The cylindrical shell that is 16mm～24mm for wall thickness, before welding, opening one side groove; The cylindrical shell that is 8mm～14mm for wall thickness, though square groove, before welding, to the first preheating of welding bead, postwelding is not easy to cause pore like this; Above-mentioned three kinds of method postwelding pores are few, and X-ray film making first-time qualification rate is brought up to more than 95% by 50% left and right in past, has reduced repair rate, has increased operating efficiency, has guaranteed product quality.
Accompanying drawing explanation
Fig. 1 is the groove schematic diagram at counterpart place before the first welded shell ring 1 welding;
Fig. 2 is the groove schematic diagram at counterpart place before the second welded shell ring 2 welding;
Fig. 3 is the schematic diagram at counterpart place before the 3rd welded shell ring 3 welding.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1, present embodiment is the welding method of the first shell ring, the method realizes by following steps: the thickness of slab δ of step 1, the first welded shell ring 1 is 26mm～28mm, at the equal bevel in inner side and outside at the first welded shell ring 1 counterpart place, 30 ° of inner side grooves, 45 ° of outside grooves, the first root face b between inner side groove and outside groove is 4mm～5mm, all polish and clean out in the both sides of the both sides of inner side groove and outside groove; Step 2, roll the first welded shell ring 1, joint is not to sternly there being gap; Step 3, adopt gas shielded arc welding to carry out counterpart spot welding in outside to the roll first welded shell ring 1, spot welding length is 20mm～40mm; Step 4, adopt Lincoln weld to carry out full weld to the first welded shell ring 1 inner side counterpart, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, and postwelding is clean by weld grinding; Step 5, adopt carbon arc air gouging welding machine butt welded seam to carry out back chipping in the outside of the first welded shell ring 1, φ 8mm carbon-point for carbon plane, finds that pore welds repair welding pore by hand; Step 6, adopt Lincoln weld to carry out counterpart full weld to the first welded shell ring 1 outside, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, postwelding is clean by weld grinding, so far, the first shell ring has welded.
The specific embodiment two: in conjunction with Fig. 1, present embodiment is described, in the step 3 of present embodiment, spot welding length is 25mm～35mm.Other step is identical with the specific embodiment one.
The specific embodiment three: in conjunction with Fig. 1, present embodiment is described, in the step 3 of present embodiment, spot welding length is 30mm.Other step is identical with the specific embodiment one or two.
The specific embodiment four: in conjunction with Fig. 1, present embodiment is described, in the step 4 of present embodiment, the voltage of automatic submerged-arc welding machine is that 33 volts, the electric current of automatic submerged-arc welding machine are 650 amperes.Other step is identical with the specific embodiment three.
The specific embodiment five: in conjunction with Fig. 1, present embodiment is described, in the step 4 of present embodiment, the voltage of automatic submerged-arc welding machine is that 35 volts, the electric current of automatic submerged-arc welding machine are 680 amperes.Other step is identical with the specific embodiment three.
The specific embodiment six: present embodiment is described in conjunction with Fig. 2, present embodiment is the welding method of the second shell ring, the method realizes by following steps: the thickness of slab δ of step 1, the second welded shell ring 2 is 16mm～24mm, at the inner side bevel at the second welded shell ring 2 counterpart places, 30 ° of inner side grooves, the second root face c between inner side groove and outside end face is 4mm～5mm, and the polishing of groove both sides is cleaned out; Step 2, roll the second welded shell ring 2, joint is not to sternly there being gap; Step 3, adopt gas shielded arc welding to carry out counterpart spot welding in outside to the roll second welded shell ring 2, spot welding length is 20mm～40mm; Step 4, adopt Lincoln welds to carry out full weld to the second welded shell ring 2 inner side counterparts, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, postwelding is clean by weld grinding, so far, the second shell ring has welded.
The specific embodiment seven: in conjunction with Fig. 2, present embodiment is described, in the step 3 of present embodiment, spot welding length is 30mm.Other step is identical with the specific embodiment six.
The specific embodiment eight: in conjunction with Fig. 2, present embodiment is described, in the step 4 of present embodiment, the voltage of automatic submerged-arc welding machine is that 34 volts, the electric current of automatic submerged-arc welding machine are 650 amperes.Other step is identical with the specific embodiment six or seven.
The specific embodiment nine: present embodiment is described in conjunction with Fig. 3, present embodiment is the welding method of the 3rd shell ring 3, the method realizes by following steps: the thickness of slab δ of step 1, the 3rd welded shell ring 2 is 8mm～14mm, by clean the 3rd welded shell ring 3 counterpart places polishing, without bevel; Step 2, roll the 3rd welded shell ring 3, joint is not to sternly there being gap; Before step 3, welding, first fire is baked welding bead, by 50 ℃～80 ℃ (avoiding like this occurring pore) of welding bead heating; Step 4, adopt Lincoln welds to carry out full weld to the 3rd welded shell ring 3 inner side counterparts, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, and postwelding is clean by weld grinding; Step 5, adopt carbon arc air gouging welding machine butt welded seam to carry out back chipping in the outside of the 3rd welded shell ring 2, φ 8mm carbon-point for carbon plane, finds that pore welds repair welding pore by hand, and postwelding is clean by weld grinding, and so far, the 3rd shell ring has welded.
The specific embodiment ten: in conjunction with Fig. 3, present embodiment is described, in the step 4 of present embodiment, the voltage of automatic submerged-arc welding machine is that 34 volts, the electric current of automatic submerged-arc welding machine are 650 amperes, and speed of welding is 400mm/ minute.Other step is identical with the specific embodiment nine.
Claims (10)
1. a drum welding method, it is characterized in that: described method realizes by following steps: the thickness of slab (δ) of step 1, the first welded shell ring (1) is 26mm～28mm, at the equal bevel in inner side and outside at the first welded shell ring (1) counterpart place, 30 ° of inner side grooves, 45 ° of outside grooves, the first root face (b) between inner side groove and outside groove is 4mm～5mm, all polishes and clean out in the both sides of the both sides of inner side groove and outside groove; Step 2, roll the first welded shell ring (1), joint is not to sternly there being gap; Step 3, to roll first welded shell ring (1) adopt gas shielded arc welding carry out counterpart spot welding in outside, spot welding length is 20mm～40mm; Step 4, adopt Lincoln weld to carry out full weld to the first welded shell ring (1) inner side counterpart, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, and postwelding is clean by weld grinding; Step 5, adopt carbon arc air gouging welding machine butt welded seam to carry out back chipping in the outside of the first welded shell ring (1), φ 8mm carbon-point for carbon plane, finds that pore welds repair welding pore by hand; Step 6, adopt Lincoln weld to carry out counterpart full weld to the first welded shell ring (1) outside, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, postwelding is clean by weld grinding, so far, the first shell ring has welded.
2. a kind of drum welding method according to claim 1, is characterized in that: in described step 3, spot welding length is 25mm～35mm.
3. according to a kind of drum welding method described in claim 1 or 2, it is characterized in that: in described step 3, spot welding length is 30mm.
4. a kind of drum welding method according to claim 3, is characterized in that: in described step 4, the voltage of automatic submerged-arc welding machine is that 33 volts, the electric current of automatic submerged-arc welding machine are 650 amperes.
5. a kind of drum welding method according to claim 3, is characterized in that: in described step 4, the voltage of automatic submerged-arc welding machine is that 35 volts, the electric current of automatic submerged-arc welding machine are 680 amperes.
6. a drum welding method, it is characterized in that: described method realizes by following steps: the thickness of slab (δ) of step 1, the second welded shell ring (2) is 16mm～24mm, at the inner side bevel at the second welded shell ring (2) counterpart place, 30 ° of inner side grooves, the second root face (c) between inner side groove and outside end face is 4mm～5mm, and the polishing of groove both sides is cleaned out; Step 2, roll the second welded shell ring (2), joint is not to sternly there being gap; Step 3, to roll second welded shell ring (2) adopt gas shielded arc welding carry out counterpart spot welding in outside, spot welding length is 20mm～40mm; Step 4, adopt Lincoln weld to carry out full weld to the second welded shell ring (2) inner side counterpart, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, postwelding is clean by weld grinding, so far, the second shell ring has welded.
7. a kind of drum welding method according to claim 6, is characterized in that: in described step 3, spot welding length is 30mm.
8. according to a kind of drum welding method described in claim 6 or 7, it is characterized in that: in described step 4, the voltage of automatic submerged-arc welding machine is that 34 volts, the electric current of automatic submerged-arc welding machine are 650 amperes.
9. a drum welding method, is characterized in that: described method realizes by following steps: the thickness of slab (δ) of step 1, the 3rd welded shell ring (2) is 8mm～14mm, by clean the polishing of the 3rd welded shell ring (3) counterpart place; Step 2, roll the 3rd welded shell ring (3), joint is not to sternly there being gap; Before step 3, welding, first fire is baked welding bead, by 50 ℃～80 ℃ of welding bead heating; Step 4, adopt Lincoln weld to carry out full weld to the 3rd welded shell ring (3) inner side counterpart, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is that 30 volts～36 volts, the electric current of automatic submerged-arc welding machine are 600 amperes～700 amperes, speed of welding is 380mm/ minute～500mm/ minute, and postwelding is clean by weld grinding; Step 5, adopt carbon arc air gouging welding machine butt welded seam to carry out back chipping in the outside of the 3rd welded shell ring (2), φ 8mm carbon-point for carbon plane, finds that pore welds repair welding pore by hand, and postwelding is clean by weld grinding, and so far, the 3rd shell ring has welded.
10. a kind of drum welding method according to claim 9, is characterized in that: in described step 4, the voltage of automatic submerged-arc welding machine is that 34 volts, the electric current of automatic submerged-arc welding machine are 650 amperes, and speed of welding is 400mm/ minute.
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| CN104308454A (en) * | 2014-06-27 | 2015-01-28 | 中航虹波风电设备有限公司 | No-rerolling tube section production process |
| CN105345235A (en) * | 2015-11-26 | 2016-02-24 | 中国水电四局（祥云）机械能源装备有限公司 | Cylindrical no-root full-penetration union melt welding method |
| CN106041309A (en) * | 2015-04-14 | 2016-10-26 | 中国十九冶集团有限公司南京分公司 | A kind of welding method of Q420 high strength steel |
| CN107398620A (en) * | 2017-08-02 | 2017-11-28 | 中建安装工程有限公司 | A kind of welding method for wind-power tower |
| CN108436320A (en) * | 2018-05-28 | 2018-08-24 | 湖北天图桥梁技术研究有限公司 | A kind of U ribs and orthotropic plate unit and its welding manufacture method |
| CN108723557A (en) * | 2018-05-25 | 2018-11-02 | 蓬莱大金海洋重工有限公司 | A kind of welding method of cylinder |
| CN109719367A (en) * | 2019-02-25 | 2019-05-07 | 苏州华达环保设备股份有限公司 | The longitudinal seam welding method of wind-power tower |
| CN110421238A (en) * | 2019-02-11 | 2019-11-08 | 上海振华重工集团(南通)传动机械有限公司 | A kind of welding procedure of high intensity cylinder butt welding |
| CN112059374A (en) * | 2020-09-14 | 2020-12-11 | 中国石油天然气集团有限公司 | Tee joint product preparation method and prefabricated tee joint product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104308454A (en) * | 2014-06-27 | 2015-01-28 | 中航虹波风电设备有限公司 | No-rerolling tube section production process |
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| CN105345235A (en) * | 2015-11-26 | 2016-02-24 | 中国水电四局（祥云）机械能源装备有限公司 | Cylindrical no-root full-penetration union melt welding method |
| CN107398620A (en) * | 2017-08-02 | 2017-11-28 | 中建安装工程有限公司 | A kind of welding method for wind-power tower |
| CN108723557A (en) * | 2018-05-25 | 2018-11-02 | 蓬莱大金海洋重工有限公司 | A kind of welding method of cylinder |
| CN108436320A (en) * | 2018-05-28 | 2018-08-24 | 湖北天图桥梁技术研究有限公司 | A kind of U ribs and orthotropic plate unit and its welding manufacture method |
| CN110421238A (en) * | 2019-02-11 | 2019-11-08 | 上海振华重工集团(南通)传动机械有限公司 | A kind of welding procedure of high intensity cylinder butt welding |
| CN110421238B (en) * | 2019-02-11 | 2021-07-30 | 上海振华重工集团(南通)传动机械有限公司 | Welding process for butt welding of high-strength barrel |
| CN109719367A (en) * | 2019-02-25 | 2019-05-07 | 苏州华达环保设备股份有限公司 | The longitudinal seam welding method of wind-power tower |
| CN112059374A (en) * | 2020-09-14 | 2020-12-11 | 中国石油天然气集团有限公司 | Tee joint product preparation method and prefabricated tee joint product |
| CN112059374B (en) * | 2020-09-14 | 2022-04-12 | 中国石油天然气集团有限公司 | Tee joint product preparation method and prefabricated tee joint product |
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Denomination of invention: A drum welding method Effective date of registration: 20220413 Granted publication date: 20160427 Pledgee: China Merchants Bank Co.,Ltd. Harbin Branch Pledgor: HARBIN HONGGUANG BOILER GENERAL FACTORY Co.,Ltd. Registration number: Y2022230000011 |