CN113319525A - Manufacturing process of D-shaped sleeve type steel chimney inner barrel - Google Patents
Manufacturing process of D-shaped sleeve type steel chimney inner barrel Download PDFInfo
- Publication number
- CN113319525A CN113319525A CN202110538698.2A CN202110538698A CN113319525A CN 113319525 A CN113319525 A CN 113319525A CN 202110538698 A CN202110538698 A CN 202110538698A CN 113319525 A CN113319525 A CN 113319525A
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- China
- Prior art keywords
- welding
- steel
- steel plate
- inner cylinder
- manufacturing process
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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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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 56
- 239000010959 steel Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000003466 welding Methods 0.000 claims abstract description 42
- 238000005452 bending Methods 0.000 claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000004927 fusion Effects 0.000 claims abstract description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052754 neon Inorganic materials 0.000 claims description 3
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a manufacturing process of an inner cylinder of a D-shaped sleeve type steel chimney, which comprises the following steps: 1. firstly, cutting a steel plate into three required specifications and sizes by using a plasma cutting machine: polishing the steel plates with the three specifications to remove oxide skin, and finishing a groove for welding; 2. putting the steel plate into a rolling machine, rolling an arc section and two bending sections, and then bending the two bending sections; 3. positioning by using a tool; assembling the circular arc section, the straight plate section and the two bent sections of the steel plate and pre-welding the cylinder body by adopting laser beams; carrying out continuous fusion welding on the steel plate by adopting a plasma arc welding mode; re-welding by an arc breaking method; 4. and fixing the steel cylinder body on a tool, and then welding the steel cylinder body with the D-type flange. By setting reasonable butt welding technological parameters, the invention not only ensures the welding quality, avoids the occurrence of cracks, ensures the appearance quality of the welded steel plate, but also meets the requirements of welding processing.
Description
Technical Field
The invention relates to a chimney processing method, in particular to a steel plate butt welding processing method.
Background
Butt joint means that butt joint parts at the end parts of all the parts are jointed and fixed, and the welding form of the metal materials also has butt joint or lap joint parts. In the process of machining the inner cylinder of the steel chimney, when the size of the steel plate can not meet the production requirement, two or more steel plates are welded by using a butt welding technique to form the required size and specification of the steel plate. However, after the special-shaped piece is welded at the corner by the conventional method and used for a long time, the corrosion resistance and the leakage resistance of the chimney cannot be guaranteed, and the smoke emission of the chimney is directly influenced.
Disclosure of Invention
The invention provides a manufacturing process of an inner cylinder of a D-shaped sleeve type steel chimney, and aims to overcome the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manufacturing process of an inner cylinder of a D-shaped sleeve type steel chimney comprises the following steps:
(1) firstly, cutting a steel plate into three required specifications and sizes by using a plasma cutting machine: polishing the steel plates with the three specifications to remove oxide skin, and finishing a groove for welding;
(2) putting the steel plate into a rolling machine, rolling an arc section and two bending sections, and then bending the two bending sections;
(3) positioning by using a tool; assembling the circular arc section, the straight plate section and the two bent sections of the steel plate and pre-welding the cylinder body by adopting laser beams; carrying out continuous fusion welding on the steel plate by adopting a plasma arc welding mode; re-welding by an arc breaking method; after welding, performing heat treatment on the spliced and welded steel plate; after the heat treatment is finished, polishing the welding line to be flat, and then rounding the arc deformed due to the welding by using a rolling machine to manufacture a steel cylinder body meeting the design requirement;
(4) and fixing the steel cylinder body on a tool, and welding the steel cylinder body with a D-shaped flange to manufacture the D-shaped sleeve type steel chimney inner cylinder.
Furthermore, the specifications of the two bending sections before bending are the same, and the bending sections are firstly bent into a circle and then bent.
Further, in the step (1), a grinding machine is adopted for grinding treatment, and the surface roughness Ra of the butt joint surface is 0.4-1.6.
Further, the protective gas in the step (3) is any one of neon, argon and helium.
Further, argon with the purity not less than 99.99% is used as the ion gas in the step (3).
Further, the heat treatment furnace in the step (3) adopts a variable-frequency high-temperature centrifugal fan to drive heat for heating.
The invention has the beneficial effects that:
(1) the welding quality is improved, the welding appearance is guaranteed, and the requirements of welding processing are met.
(2) Avoids the welding of the bent angle of the special-shaped piece, not only meets the manufacturing requirements of the special-shaped piece, but also ensures the corrosion resistance and leakage resistance of the chimney.
Drawings
FIG. 1 is a plan view of an inner cylinder of D-section steel according to the present invention;
description of reference numerals: 1-D type inner cylinder arc section; 2-D type inner cylinder flat plate section; a first bending section of the 3-D type inner cylinder; and 4-D type inner cylinder bending section II.
Detailed Description
In order to make the invention more comprehensible, a preferred embodiment is described in detail below with reference to the accompanying drawings:
the invention provides a manufacturing process of an inner cylinder of a D-shaped sleeve type steel chimney, which comprises the following steps:
(1) firstly, a steel plate is cut into three required specifications by a plasma cutting machine, as shown in fig. 1, a circular arc section 1 of a D-shaped inner cylinder, a straight plate section 2 of the D-shaped inner cylinder, and first, second and third bent sections 3 and 4 of the D-shaped inner cylinder (the sections have the same specification before being bent, and are firstly bent into a circle and then bent), then the steel plates of the three sections are polished to remove scale, and a groove for welding is finished.
(2) And (3) putting the steel plate into a rolling machine, rolling the D-shaped inner cylinder arc section 1, and bending the D-shaped inner cylinder bending sections I, II, 3 and 4, and then bending the D-shaped inner cylinder bending sections I, II, 3 and 4.
(3) Positioning by using a tool; d-shaped inner cylinder arc sections 1, D-shaped inner cylinder straight sections 2 and D-shaped inner cylinder bending sections I, II, 3, 4 of the steel plate are grouped and pre-welded to the cylinder body by laser beams; carrying out continuous fusion welding on the steel plate by adopting a plasma arc welding mode; re-welding by an arc breaking method; after welding, performing heat treatment on the spliced and welded steel plate; after the heat treatment is finished, polishing the welding line to be flat, and then rounding the arc deformed due to the welding by using a rolling machine to manufacture a steel cylinder body meeting the design requirement;
(4) and fixing the steel cylinder body on a tool, and welding the steel cylinder body with a D-shaped flange to manufacture the D-shaped sleeve type steel chimney inner cylinder.
Wherein:
and (2) polishing by using a polisher in the step (1), wherein the surface roughness Ra of the butt joint surface is 0.4-1.6.
And (4) in the step (3), the protective gas is any one of neon, argon and helium.
And (4) adopting argon with the purity not less than 99.99% as the ion gas in the step (3).
And (4) driving heat to heat by the heat treatment furnace in the step (3) by adopting a variable-frequency high-temperature centrifugal fan.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these are also considered to be within the scope of the present invention.
Claims (6)
1. A manufacturing process of an inner cylinder of a D-shaped sleeve type steel chimney is characterized by comprising the following steps:
(1) firstly, cutting a steel plate into three required specifications and sizes by using a plasma cutting machine: polishing the steel plates with the three specifications to remove oxide skin, and finishing a groove for welding;
(2) putting the steel plate into a rolling machine, rolling an arc section and two bending sections, and then bending the two bending sections;
(3) positioning by using a tool; assembling the circular arc section, the straight plate section and the two bent sections of the steel plate and pre-welding the cylinder body by adopting laser beams; carrying out continuous fusion welding on the steel plate by adopting a plasma arc welding mode; re-welding by an arc breaking method; after welding, performing heat treatment on the spliced and welded steel plate; after the heat treatment is finished, polishing the welding line to be flat, and then rounding the arc deformed due to the welding by using a rolling machine to manufacture a steel cylinder body meeting the design requirement;
(4) and fixing the steel cylinder body on a tool, and welding the steel cylinder body with a D-shaped flange to manufacture the D-shaped sleeve type steel chimney inner cylinder.
2. The manufacturing process of the D-shaped telescopic steel chimney inner cylinder according to claim 1, characterized in that: the specifications of the two bending sections before bending are the same, and the bending sections are firstly bent into a circle and then bent.
3. The manufacturing process of the D-shaped telescopic steel chimney inner cylinder according to claim 1, characterized in that: and (2) polishing by using a polisher in the step (1), wherein the surface roughness Ra of the butt joint surface is 0.4-1.6.
4. The manufacturing process of the D-shaped telescopic steel chimney inner cylinder according to claim 1, characterized in that: and (4) in the step (3), the protective gas is any one of neon, argon and helium.
5. The manufacturing process of the D-shaped telescopic steel chimney inner cylinder according to claim 1, characterized in that: and (4) adopting argon with the purity not less than 99.99% as the ion gas in the step (3).
6. The manufacturing process of the D-shaped telescopic steel chimney inner cylinder according to claim 1, characterized in that: and (4) driving heat to heat by the heat treatment furnace in the step (3) by adopting a variable-frequency high-temperature centrifugal fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110538698.2A CN113319525A (en) | 2021-05-18 | 2021-05-18 | Manufacturing process of D-shaped sleeve type steel chimney inner barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110538698.2A CN113319525A (en) | 2021-05-18 | 2021-05-18 | Manufacturing process of D-shaped sleeve type steel chimney inner barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113319525A true CN113319525A (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110538698.2A Pending CN113319525A (en) | 2021-05-18 | 2021-05-18 | Manufacturing process of D-shaped sleeve type steel chimney inner barrel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114043167A (en) * | 2021-10-22 | 2022-02-15 | 南通中远重工有限公司 | Construction process of track shoe of mining machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654162A (en) * | 2005-02-23 | 2005-08-17 | 杨瑾 | Automatic manufacturing technique of large sized steel pipe |
| CN102491011A (en) * | 2011-12-28 | 2012-06-13 | 四川蓝星机械有限公司 | Large recovered oil and gas tank |
| WO2015021693A1 (en) * | 2013-08-14 | 2015-02-19 | 中国十七冶集团有限公司 | Method of constructing steel chimney cylinder by upside-down mounting |
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| JP2015212205A (en) * | 2015-07-22 | 2015-11-26 | 株式会社タダノ | Boom and method for welding the same |
| CN105108458A (en) * | 2015-09-08 | 2015-12-02 | 云南建工钢结构有限公司 | Method for manufacturing unequal thickness steel pipe |
| CN107081346A (en) * | 2017-05-12 | 2017-08-22 | 云南建投钢结构股份有限公司 | It is a kind of not wait the method that wall thickness arc makes large diameter steel pipe with two pieces |
| CN109519611A (en) * | 2018-11-22 | 2019-03-26 | 中国水电四局（祥云）机械能源装备有限公司 | A kind of draft tube elbow and manufacturing method |
| CN110388122A (en) * | 2019-07-26 | 2019-10-29 | 山东电力建设第三工程有限公司 | A kind of inner steel cylinder of chimney installation system and installation method |
| CN110869156A (en) * | 2017-07-07 | 2020-03-06 | 乔治洛德方法研究和开发液化空气有限公司 | Welding method of large-sized cylinder section |
| CN111185726A (en) * | 2020-01-15 | 2020-05-22 | 中国十七冶集团有限公司 | Variable cross-section transition construction method for arc square tube |
| CN111716078A (en) * | 2019-03-22 | 2020-09-29 | 上海梅山钢铁股份有限公司 | Plasma welding method for straight seam of thin-wall cylindrical steel shell |
| CN112548342A (en) * | 2020-12-03 | 2021-03-26 | 华诚博远钢结构有限公司 | Butt welding processing method of steel plates |
-
2021
- 2021-05-18 CN CN202110538698.2A patent/CN113319525A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654162A (en) * | 2005-02-23 | 2005-08-17 | 杨瑾 | Automatic manufacturing technique of large sized steel pipe |
| CN102491011A (en) * | 2011-12-28 | 2012-06-13 | 四川蓝星机械有限公司 | Large recovered oil and gas tank |
| WO2015021693A1 (en) * | 2013-08-14 | 2015-02-19 | 中国十七冶集团有限公司 | Method of constructing steel chimney cylinder by upside-down mounting |
| CN204645809U (en) * | 2015-05-25 | 2015-09-16 | 湖南省第四工程有限公司 | Inner steel cylinder of chimney burst slides assembled positioning apparatus |
| JP2015212205A (en) * | 2015-07-22 | 2015-11-26 | 株式会社タダノ | Boom and method for welding the same |
| CN105108458A (en) * | 2015-09-08 | 2015-12-02 | 云南建工钢结构有限公司 | Method for manufacturing unequal thickness steel pipe |
| CN107081346A (en) * | 2017-05-12 | 2017-08-22 | 云南建投钢结构股份有限公司 | It is a kind of not wait the method that wall thickness arc makes large diameter steel pipe with two pieces |
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| CN110388122A (en) * | 2019-07-26 | 2019-10-29 | 山东电力建设第三工程有限公司 | A kind of inner steel cylinder of chimney installation system and installation method |
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Application publication date: 20210831 |
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