CN103862133B - A kind of drum welding method - Google Patents
A kind of drum welding method Download PDFInfo
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- CN103862133B CN103862133B CN201410138525.1A CN201410138525A CN103862133B CN 103862133 B CN103862133 B CN 103862133B CN 201410138525 A CN201410138525 A CN 201410138525A CN 103862133 B CN103862133 B CN 103862133B
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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)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
A kind of drum welding method, it relates to a kind of method for boiler barrel welding, adopts x-ray detection, there is the problem that repair rate is high after solving the welding of existing boiler barrel.The thickness of slab of the welded shell ring of scheme one:, first is 26mm ~ 28mm, the equal bevel in inner side and outer side at counterpart place; Two, joint is to sternly; Three, outside spot welding; Four, inner side counterpart full weld; Five, outside adopts carbon arc air gouging welding machine to carry out back chipping; Six, outside full weld, postwelding is clean by weld grinding.The thickness of slab of the welded shell ring of scheme two:, second is 16mm ~ 24mm, inner side bevel; Two, joint is to sternly; Three, outside spot welding; Four, inner side counterpart adopts Lincoln weld to carry out full weld.The thickness of slab of scheme three:, the 3rd welded shell ring is 8mm ~ 14mm, by clean for the polishing of counterpart place; Two, joint is to sternly; Three, the roasting welding bead of welding fire; Four, inner side full weld; Step 5, outside adopt carbon arc air gouging welding machine butt welded seam to carry out back chipping.
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 taked is also different; Be the cylindrical shell of 26mm ~ 28mm for wall thickness, before welding, be opening one side groove, owing to being slab, in side, welding easily causes postwelding pore many, cannot repair, being the cylindrical shell of 16mm ~ 24mm for wall thickness, before welding, is that square groove directly welds, such welding also easily causes postwelding pore many, cannot repair; Being the cylindrical shell of 8mm ~ 14mm for wall thickness, before welding, is that square groove directly welds, and welding bead not preheating before weldering, welds like this and also easily causes postwelding pore many, cannot repair; Above-mentioned three kinds of method postweldings need adopt x-ray detection, and the result after flaw detection exists the high problem of repair rate, has had a strong impact on manufacturing schedule.
Summary of the invention
The present invention adopts x-ray detection after solving the welding of existing boiler barrel, there is the problem that repair rate is high, and provides a kind of drum welding method.
Scheme one: a kind of drum welding method is realized by following steps: the thickness of slab of step one, the first welded shell ring 1 is 26mm ~ 28mm, at the equal bevel in inner side and outer side at the first welded shell ring counterpart place, inner side groove 30 °, outside groove 45 °, the first root face between inner side groove and outside groove is 4mm ~ 5mm, all polishes and clean out in the both sides of inner side groove and the both sides of outside groove; Step 2, roll the first welded shell ring, joint is to sternly not having 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, to inside the first welded shell ring counterpart adopt Lincoln weld carry out full weld, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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, carbon plane φ 8mm carbon-point, finds that pore welds repair welding pore by hand; Step 6, Lincoln weld is adopted to carry out counterpart full weld to outside the first welded shell ring, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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 is realized by following steps: the thickness of slab of step one, the second welded shell ring is 16mm ~ 24mm, at the inner side bevel at the second welded shell ring counterpart place, inner side groove 30 °, the second root face between inner side groove and end face outside is 4mm ~ 5mm, and the polishing of groove both sides is cleaned out; Step 2, roll the second welded shell ring, joint is to sternly not having 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, to inside the second welded shell ring counterpart adopt Lincoln weld carry out full weld, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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 is realized by following steps: the thickness of slab of step one, the 3rd welded shell ring is 8mm ~ 14mm, by clean for the 3rd welded shell ring counterpart place polishing; Step 2, roll the 3rd welded shell ring, joint is to sternly not having gap; Before step 3, welding, first welding bead baked by fire, heats 50 DEG C ~ 80 DEG C by welding bead; Step 4, to inside the 3rd welded shell ring counterpart adopt Lincoln weld carry out full weld, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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, carbon plane φ 8mm carbon-point, find that pore welds repair welding pore by hand, 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, be the cylindrical shell of 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; Be the cylindrical shell of 16mm ~ 24mm for wall thickness, before welding, opening one side groove; Be the cylindrical shell of 8mm ~ 14mm for wall thickness, though square groove, before welding to the first preheating of welding bead, such postwelding is not easy to cause pore; Above-mentioned three kinds of method postwelding pores are few, and X-ray film making first-time qualification rate brought up to more than 95% by about 50% of the past, decreased repair rate, added operating efficiency, ensure that product quality.
Accompanying drawing explanation
Fig. 1 is the groove schematic diagram that the first welded shell ring 1 welds front counterpart place;
Fig. 2 is the groove schematic diagram that the second welded shell ring 2 welds front counterpart place;
Fig. 3 is the schematic diagram that the 3rd welded shell ring 3 welds front counterpart place.
Detailed description of the invention
Detailed description of the invention one: composition graphs 1 illustrates present embodiment, present embodiment is the welding method of the first shell ring, the method is realized by following steps: the thickness of slab δ of step one, the first welded shell ring 1 is 26mm ~ 28mm, at the equal bevel in inner side and outer side at the first welded shell ring 1 counterpart place, inner side groove 30 °, outside groove 45 °, 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 inner side groove and the both sides of outside groove; Step 2, roll the first welded shell ring 1, joint is to sternly not having 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, to inside the first welded shell ring 1 counterpart adopt Lincoln weld carry out full weld, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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, carbon plane φ 8mm carbon-point, finds that pore welds repair welding pore by hand; Step 6, Lincoln weld is adopted to carry out counterpart full weld to outside the first welded shell ring 1, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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.
Detailed description of the invention two: composition graphs 1 illustrates present embodiment, in the step 3 of present embodiment, spot welding length is 25mm ~ 35mm.Other step is identical with detailed description of the invention one.
Detailed description of the invention three: composition graphs 1 illustrates present embodiment, in the step 3 of present embodiment, spot welding length is 30mm.Other step is identical with detailed description of the invention one or two.
Detailed description of the invention four: composition graphs 1 illustrates present embodiment, in the step 4 of present embodiment, the voltage of automatic submerged-arc welding machine is 33 volts, the electric current of automatic submerged-arc welding machine is 650 amperes.Other step is identical with detailed description of the invention three.
Detailed description of the invention five: composition graphs 1 illustrates present embodiment, in the step 4 of present embodiment, the voltage of automatic submerged-arc welding machine is 35 volts, the electric current of automatic submerged-arc welding machine is 680 amperes.Other step is identical with detailed description of the invention three.
Detailed description of the invention six: composition graphs 2 illustrates present embodiment, present embodiment is the welding method of the second shell ring, the method is realized by following steps: the thickness of slab δ of step one, the second welded shell ring 2 is 16mm ~ 24mm, at the inner side bevel at the second welded shell ring 2 counterpart place, inner side groove 30 °, the second root face c between inner side groove and end face outside is 4mm ~ 5mm, and the polishing of groove both sides is cleaned out; Step 2, roll the second welded shell ring 2, joint is to sternly not having 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, to inside the second welded shell ring 2 counterpart adopt Lincoln weld carry out full weld, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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.
Detailed description of the invention seven: composition graphs 2 illustrates present embodiment, in the step 3 of present embodiment, spot welding length is 30mm.Other step is identical with detailed description of the invention six.
Detailed description of the invention eight: composition graphs 2 illustrates present embodiment, in the step 4 of present embodiment, the voltage of automatic submerged-arc welding machine is 34 volts, the electric current of automatic submerged-arc welding machine is 650 amperes.Other step is identical with detailed description of the invention six or seven.
Detailed description of the invention nine: composition graphs 3 illustrates present embodiment, present embodiment is the welding method of the 3rd shell ring 3, the method is realized by following steps: the thickness of slab δ of step one, the 3rd welded shell ring 3 is 8mm ~ 14mm, by clean for the 3rd welded shell ring 3 counterpart place polishing, without the need to bevel; Step 2, roll the 3rd welded shell ring 3, joint is to sternly not having gap; Before step 3, welding, first welding bead baked by fire, heats 50 DEG C ~ 80 DEG C (avoiding like this occurring pore) by welding bead; Step 4, to inside the 3rd welded shell ring 3 counterpart adopt Lincoln weld carry out full weld, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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 3, carbon plane φ 8mm carbon-point, find that pore welds repair welding pore by hand, postwelding is clean by weld grinding, and so far, the 3rd shell ring has welded.
Detailed description of the invention ten: composition graphs 3 illustrates present embodiment, in the step 4 of present embodiment, the voltage of automatic submerged-arc welding machine is 34 volts, the electric current of automatic submerged-arc welding machine is 650 amperes, and speed of welding is 400mm/ minute.Other step is identical with detailed description of the invention nine.
Claims (10)
1. a drum welding method, it is characterized in that: described method is realized by following steps: the thickness of slab (δ) of step one, the first welded shell ring (1) is 26mm ~ 28mm, at the equal bevel in inner side and outer side at the first welded shell ring (1) counterpart place, inner side groove 30 °, outside groove 45 °, 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 inner side groove and the both sides of outside groove; Step 2, roll the first welded shell ring (1), joint is to sternly not having 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, to first welded shell ring (1) inner side counterpart adopt Lincoln weld carry out full weld, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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), carbon plane φ 8mm carbon-point, finds that pore welds repair welding pore by hand; Step 6, to first welded shell ring (1) outside adopt Lincoln weld carry out counterpart full weld, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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. a kind of drum welding method according to claim 1 or 2, 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 33 volts, the electric current of automatic submerged-arc welding machine is 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 35 volts, the electric current of automatic submerged-arc welding machine is 680 amperes.
6. a drum welding method, it is characterized in that: described method is realized by following steps: the thickness of slab (δ) of step one, the second welded shell ring (2) is 16mm ~ 24mm, at the inner side bevel at the second welded shell ring (2) counterpart place, inner side groove 30 °, the second root face (c) between inner side groove and end face outside is 4mm ~ 5mm, and the polishing of groove both sides is cleaned out; Step 2, roll the second welded shell ring (2), joint is to sternly not having 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, to second welded shell ring (2) inner side counterpart adopt Lincoln weld carry out full weld, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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. a kind of drum welding method according to claim 6 or 7, is characterized in that: in described step 4, the voltage of automatic submerged-arc welding machine is 34 volts, the electric current of automatic submerged-arc welding machine is 650 amperes.
9. a drum welding method, it is characterized in that: described method is realized by following steps: the thickness of slab (δ) of step one, the 3rd welded shell ring (3) is 8mm ~ 14mm, by clean for the polishing of the 3rd welded shell ring (3) counterpart place; Step 2, roll the 3rd welded shell ring (3), joint is to sternly not having gap; Before step 3, welding, first welding bead baked by fire, is heated to 50 DEG C ~ 80 DEG C by welding bead; Step 4, to the 3rd welded shell ring (3) inner side counterpart adopt Lincoln weld carry out full weld, wherein gage of wire is 4.0mm, the voltage of automatic submerged-arc welding machine is 30 volts ~ 36 volts, the electric current of automatic submerged-arc welding machine is 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 (3), carbon plane φ 8mm carbon-point, find that pore welds repair welding pore by hand, 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 34 volts, the electric current of automatic submerged-arc welding machine is 650 amperes, and speed of welding is 400mm/ minute.
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| CN201410138525.1A CN103862133B (en) | 2014-04-08 | 2014-04-08 | A kind of drum welding method |
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| CN201410138525.1A CN103862133B (en) | 2014-04-08 | 2014-04-08 | A kind of drum welding method |
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| CN103862133B true CN103862133B (en) | 2016-04-27 |
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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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| CN105345235B (en) * | 2015-11-26 | 2018-03-13 | 中国水电四局（祥云）机械能源装备有限公司 | A kind of cylindrical shape is without back chipping full penetration Lincoln weld 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 |
| 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 |
| 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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