CN104907677A - Automatic carbon dioxide arc welding process for steel inner cylinder of chimney - Google Patents

Automatic carbon dioxide arc welding process for steel inner cylinder of chimney Download PDF

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Publication number
CN104907677A
CN104907677A CN201510314747.9A CN201510314747A CN104907677A CN 104907677 A CN104907677 A CN 104907677A CN 201510314747 A CN201510314747 A CN 201510314747A CN 104907677 A CN104907677 A CN 104907677A
Authority
CN
China
Prior art keywords
welding
carbon dioxide
groove
arc welding
automatic
Prior art date
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.)
Pending
Application number
CN201510314747.9A
Other languages
Chinese (zh)
Inventor
丁连征
王清和
王刚
周民
刘春山
王海涛
卞海兵
杨中波
李旭海
肖扬名
郭和玲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huadian Zhengzhou Machinery Design and Research Institute Co Ltd
Original Assignee
Huadian Zhengzhou Machinery Design and Research Institute Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huadian Zhengzhou Machinery Design and Research Institute Co Ltd filed Critical Huadian Zhengzhou Machinery Design and Research Institute Co Ltd
Priority to CN201510314747.9A priority Critical patent/CN104907677A/en
Publication of CN104907677A publication Critical patent/CN104907677A/en
Pending legal-status Critical Current

Links

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
    • B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
    • B23K28/02—Combined welding or cutting procedures or apparatus
    • 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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/10—Spot welding; Stitch welding
    • B23K11/11—Spot 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
    • B23K9/16—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
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles

Abstract

The invention provides an automatic carbon dioxide arc welding process for a steel inner cylinder of a chimney. The automatic carbon dioxide arc welding process includes the following steps: 1), clearing away greasy dirt and impurities on welding wires and the surface and two sides of a groove; 2), adopting the single-side V-shaped groove or the double-side V-shaped groove, wherein the angle of the groove is 50-60 degrees; 3), pairing rolled steel cylinders, performing consumable-electrode manual semi-automatic point welding on the rolled steel cylinders, performing consumable-electrode automatic carbon dioxide arc welding for filling and cap surface welding, and welding two sides alternately during double-side welding. The automatic carbon dioxide arc welding process has the advantages that defects of electrode arc welding of the steel inner cylinder in the prior art are overcome, so that production efficiency is improved and requirements on welders' skills are reduced; welding production efficiency is improved remarkably, and deposition efficiency of deposited metal is improved by 2-3 times; the problem of incapability of utilizing electrode stubs is caused when electrodes are used, but does not exists when consumable-electrode automatic arc welding is adopted, so that material utilization rate is increased.

Description

A kind of shielded arc welding of automatic carbon dioxide technique of inner steel cylinder of chimney
Technical field
The present invention relates to the welding technology field of thermal power plant's inner steel cylinder of chimney, particularly a kind of shielded arc welding of automatic carbon dioxide technique of inner steel cylinder of chimney.
Background technology
The method of current inner steel cylinder of chimney employing SMAW is carried out welding and be there is following shortcoming: 1, welding capacity is large, and weld seam carbon steel thickness is 10mm, the nearly 5000m of total length, and production efficiency is low, and its productivity ratio is only about 1/3rd of automatic welding; 2, SMAW heat input is large, causes weldment to be out of shape large, school type difficulty; 3, SMAW is high to welder's skill set requirements, and welding quality height depends on welder's technical ability, and the reduction of many factors the causes welding quality such as welder is vulnerable to muscle power, mood.For improving this state, research automatic welding process substitutes the demand that SMAW becomes welding production.
Summary of the invention
The technical problem to be solved in the present invention is just to provide a kind of and can reduces costs, enhance productivity, reduce labor strength, reduce gas metal-arc welding automatic soldering technique to the inner steel cylinder of chimney that craftsmanship relies on, to solve prior art Problems existing.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A shielded arc welding of automatic carbon dioxide technique for inner steel cylinder of chimney, comprises following steps:
1) welding wire, the greasy dirt of groove face and groove both sides and impurity is cleared up;
2) groove adopts monolateral double V-groove or bilateral double V-groove, and bevel angle is 50 ° ~ 60 °;
3) will roll that steel cylinder is grouping on request, spot welding; Spot welding adopts the manual semiautomatic welding of consumable electrode to weld, and then adopts consumable electrode automatic gas to protect weldering and carries out filling and cover welding, and the protective gas that consumable electrode gas guarantor weldering adopts is CO2, and during welding by both sides, both sides replace welding.
The length optional of spot welding selects 30 ~ 50mm.
Consumable electrode automatic gas protects the CO that weldering adopts 2the gas flow of protective gas is 15 ~ 20L/min; Adopt pulse current to weld during welding, welding current is 150 ~ 240A, and voltage is 22 ~ 27V, and speed of welding is 300 ~ 420mm/min, and welding wire elongation is 15mm.
Instant invention overcomes the drawback that weldable steel inner core in the past adopts electric bar arc welding, production efficiency is improved, the practical operation of welder's technical ability is required to the operation requirements be converted into equipment, welder's skill set requirements is reduced; Welding production efficiency is largely increased simultaneously, and the deposition efficiency of deposited metal brings up to original 2-3 doubly; Welding rod exists discard electrode cannot Utilizing question, and consumable electrode automatic gas shielded welding does not exist problem in this respect, and the utilization rate of material is improved.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of monolateral double V-groove of the present invention.
Fig. 2 is the schematic diagram of bilateral double V-groove of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The invention provides a kind of gas metal-arc welding automatic soldering technique of inner steel cylinder of chimney, comprise following steps:
1) clear up welding wire, the greasy dirt of groove face and groove both sides and impurity, guarantee that welding wire surface must not have iron rust, greasy dirt etc., metallic luster is exposed in groove and groove both sides;
2) groove adopts monolateral double V-groove or bilateral double V-groove, and bevel angle gets 50 ° ~ 60 °, and root face is 0-1mm;
3) will roll that steel cylinder is grouping on request, spot welding; Spot welding adopts the manual semiautomatic welding of consumable electrode to weld, and the length optional of spot welding selects 30mm-50mm, then adopts consumable electrode automatic gas to protect weldering and carries out filling and cover welding; Answer both sides to replace welding during welding by both sides, single welding should note the monitoring of being out of shape; The protective gas that consumable electrode gas protects weldering employing is CO 2, gas flow is 15 ~ 20L/min; Adopt pulse current to weld during welding, welding current is 150 ~ 240A, and voltage is 22 ~ 27V, and speed of welding is 300 ~ 420mm/min, and welding wire elongation is 15mm.

Claims (3)

1. a shielded arc welding of automatic carbon dioxide technique for inner steel cylinder of chimney, is characterized in that comprising following steps:
1) welding wire, the greasy dirt of groove face and groove both sides and impurity is cleared up;
2) groove adopts monolateral double V-groove or bilateral double V-groove, and bevel angle is 50 ° ~ 60 °;
3) will roll that steel cylinder is grouping on request, spot welding; Spot welding adopts the manual semiautomatic welding of consumable electrode to weld, and then adopts consumable electrode automatic gas to protect weldering and carries out filling and cover welding, and the protective gas that consumable electrode gas guarantor weldering adopts is CO 2, during welding by both sides, both sides replace welding.
2. the shielded arc welding of automatic carbon dioxide technique of inner steel cylinder of chimney according to claim 1, is characterized in that: the length optional of spot welding selects 30 ~ 50mm.
3. the shielded arc welding of automatic carbon dioxide technique of inner steel cylinder of chimney according to claim 1, is characterized in that: consumable electrode automatic gas protects the CO that weldering adopts 2the gas flow of protective gas is 15 ~ 20L/min; Adopt pulse current to weld during welding, welding current is 150 ~ 240A, and voltage is 22 ~ 27V, and speed of welding is 300 ~ 420mm/min, and welding wire elongation is 15mm.
CN201510314747.9A 2015-06-10 2015-06-10 Automatic carbon dioxide arc welding process for steel inner cylinder of chimney Pending CN104907677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510314747.9A CN104907677A (en) 2015-06-10 2015-06-10 Automatic carbon dioxide arc welding process for steel inner cylinder of chimney

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510314747.9A CN104907677A (en) 2015-06-10 2015-06-10 Automatic carbon dioxide arc welding process for steel inner cylinder of chimney

Publications (1)

Publication Number Publication Date
CN104907677A true CN104907677A (en) 2015-09-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510314747.9A Pending CN104907677A (en) 2015-06-10 2015-06-10 Automatic carbon dioxide arc welding process for steel inner cylinder of chimney

Country Status (1)

Country Link
CN (1) CN104907677A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106271244A (en) * 2016-08-25 2017-01-04 安徽昌永得机械有限公司 The manufacture method of arm cylinder
CN108788411A (en) * 2018-07-02 2018-11-13 中国电建集团核电工程有限公司 Back chipping welding procedure is exempted from medium plate splicing
CN111774702A (en) * 2020-07-08 2020-10-16 北京地铁车辆装备有限公司 Welding method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0887139A1 (en) * 1997-06-26 1998-12-30 Saipem S.p.A. Automatic tracking process of the joint bevel for the butt welding of pipes and equipment for the embodiment of the process
CN101259562A (en) * 2008-03-20 2008-09-10 浙江盛达铁塔有限公司 Welding technique for rolled steel
CN103495795A (en) * 2013-10-10 2014-01-08 中国化学工程第三建设有限公司 Gas protection bottoming automatic welding process of carbon steel pipeline consumable electrode

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0887139A1 (en) * 1997-06-26 1998-12-30 Saipem S.p.A. Automatic tracking process of the joint bevel for the butt welding of pipes and equipment for the embodiment of the process
CN101259562A (en) * 2008-03-20 2008-09-10 浙江盛达铁塔有限公司 Welding technique for rolled steel
CN103495795A (en) * 2013-10-10 2014-01-08 中国化学工程第三建设有限公司 Gas protection bottoming automatic welding process of carbon steel pipeline consumable electrode

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
殷荣幸等: "二氧化碳气体保护焊在锅炉水冷壁焊接中替代焊条电弧焊的可行性分析", 《科技创新导报》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106271244A (en) * 2016-08-25 2017-01-04 安徽昌永得机械有限公司 The manufacture method of arm cylinder
CN106271244B (en) * 2016-08-25 2017-10-13 安徽昌永得机械有限公司 The preparation method of arm cylinder
CN108788411A (en) * 2018-07-02 2018-11-13 中国电建集团核电工程有限公司 Back chipping welding procedure is exempted from medium plate splicing
CN111774702A (en) * 2020-07-08 2020-10-16 北京地铁车辆装备有限公司 Welding method

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Application publication date: 20150916