CN104014986A - Large steel tube manufacturing process - Google Patents
Large steel tube manufacturing process Download PDFInfo
- Publication number
- CN104014986A CN104014986A CN201410199704.6A CN201410199704A CN104014986A CN 104014986 A CN104014986 A CN 104014986A CN 201410199704 A CN201410199704 A CN 201410199704A CN 104014986 A CN104014986 A CN 104014986A
- Authority
- CN
- China
- Prior art keywords
- welding
- length
- steel tube
- arc
- steel pipe
- 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
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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/027—Making tubes with soldering or 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/032—Seam welding; Backing means; Inserts for three-dimensional seams
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/035—Seam welding; Backing means; Inserts with backing means disposed under the seam
-
- 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
- B23K2101/06—Tubes
Abstract
The invention relates to a large steel tube manufacturing process. The process includes the steps that a steel tube is divided according to welding joints, and the welding joints are of a concave-convex type; the steel tube is divided into sections with the length of 2.5 meters, the width of a veneer reeling machine is the same as the length of a welder arm for conducting automatic internal welding, the stretching area of the steel tube is calculated, and then the steel tube is cut and bent; grooves of the steel tube are all reverse grooves before the steel tube is welded, by means of the welder arm for conducting automatic internal welding, internal welding is completed, and then external carbon planing is conducted; finally, external forming welding is conducted, the length of end tabs and the length of arc blowouts are 200 millimeters, cracks are left in the end tabs and the arc blowouts, and heat preservation is conducted on the welding joints through asbestos cloth so that the cooling time of the welding joints is prolonged; after welding is completed, follow-up welding joint grinding processing is completed. According to the process, the end tabs with the length of 200 millimeters and the arc blowouts with the length of 200 millimeters are adopted, the cracks are left in the end tabs and the arc blowouts, and heat preservation is conducted on the welding joints through the asbestos cloth so as to prolong the cooling time of the welding joints; as a result, the smoothed welding joints subjected to grinding can not be seen or touched, and the RT qualified rate of the welding joints is 100%.
Description
Technical field
The present invention relates to a kind of manufacture craft of large-scale steel pipe.
Background technology
Building, some is special while having landmark thing, need 800*14,17 meters of length, the steel pipe of material Q345B, the tube wall of this steel pipe is thicker, the pipe 5-6 ton that weighs, because this steel pipe is the pillar as load-bearing, so the requirement of butt welded seam is very strict, with hand touch less than, sense organ be can't see.At present, a lot of producers can select to replace than design specification big steel pipe, virtually increased raw-material cost, and the weight of steel pipe can exceed the scope of design sometimes, and whole project is all caused to potential safety hazard.
Summary of the invention
The object of the invention is in order to overcome above deficiency, a kind of manufacture craft of saving cost of manufacture, weld seam and can meet the requirements of completely a kind of large-scale steel pipe is provided.
Object of the present invention is achieved through the following technical solutions: a kind of manufacture craft of large-scale steel pipe, comprises the following steps:
A, steel pipe is carried out to weld seam division, weld seam is concave-convex type;
B, steel pipe is divided into 2.5 meters long, the width of veneer reeling machine is consistent with the length of the welding machine arm of inner automatic welding, then calculates steel pipe developed area, and bent plate is carried out in blanking afterwards;
C, the steel pipe groove before welding is reverse side groove, first completes in interior welds by means of the welding machine arm of inner automatic welding, then carries out exterior carbon plane;
D, finally carry out outside moulding welding, the length of run-on tab and arc-extinguishing plate is 200mm, crackle is stayed on run-on tab and arc-extinguishing plate, and butt welded seam is incubated with asbestos cloth, extends the cool time of weld seam;
E, welded after, the weld seam that completes the later stage polishes processing.
The present invention compared with prior art has the following advantages: the present invention has adopted run-on tab and arc-extinguishing plate, and the length of run-on tab and arc-extinguishing plate is increased to 200mm by original 100mm, crackle is stayed on run-on tab and arc-extinguishing plate, and butt welded seam is incubated with asbestos cloth, extend the cool time of weld seam, weld seam after polishing like this had both been touched less than also can't see, and weld seam 100%RT is qualified.
brief description of the drawings:
Fig. 1 is structural representation of the present invention;
Number in the figure: 1-steel pipe, 2-weld seam.
detailed description of the invention:
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, and this embodiment only, for explaining the present invention, does not form limiting the scope of the present invention.
As Fig. 1 shows a kind of embodiment of the manufacture craft of a kind of large-scale steel pipe of the present invention, comprise the following steps:
A, steel pipe 1 is carried out to weld seam division, weld seam 2 is concave-convex type, and the longitudinal seam that staggers is code requirement;
B, steel pipe 1 is divided into 2.5 meters long, the width of veneer reeling machine is consistent with the length of the welding machine arm of inner automatic welding, then calculates steel pipe developed area, and bent plate is carried out in blanking afterwards;
C, the groove of steel pipe 1 before welding are reverse side groove, first complete in interior welds by means of the welding machine arm of inner automatic welding, then carry out exterior carbon plane;
D, finally carry out outside moulding welding, the length of run-on tab and arc-extinguishing plate is 200mm, crackle is stayed on run-on tab and arc-extinguishing plate, and butt welded seam 2 use asbestos cloths insulations, extends the cool time of weld seam 2;
E, welded after, complete the later stage weld seam 2 polish processing.
The present invention has adopted run-on tab and arc-extinguishing plate, and the length of run-on tab and arc-extinguishing plate is increased to 200mm by original 100mm, crackle is stayed on run-on tab and arc-extinguishing plate, and butt welded seam is incubated with asbestos cloth, extend the cool time of weld seam, weld seam after polishing like this had both been touched less than also can't see, and weld seam 100%RT is qualified.
Claims (1)
1. a manufacture craft for large-scale steel pipe, is characterized in that: comprise the following steps:
A, steel pipe is carried out to weld seam division, weld seam is concave-convex type;
B, steel pipe is divided into 2.5 meters long, the width of veneer reeling machine is consistent with the length of the welding machine arm of inner automatic welding, then calculates steel pipe developed area, and bent plate is carried out in blanking afterwards;
C, the steel pipe groove before welding is reverse side groove, first completes in interior welds by means of the welding machine arm of inner automatic welding, then carries out exterior carbon plane;
D, finally carry out outside moulding welding, the length of run-on tab and arc-extinguishing plate is 200mm, crackle is stayed on run-on tab and arc-extinguishing plate, and butt welded seam is incubated with asbestos cloth, extends the cool time of weld seam;
E, welded after, the weld seam that completes the later stage polishes processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199704.6A CN104014986A (en) | 2014-05-13 | 2014-05-13 | Large steel tube manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199704.6A CN104014986A (en) | 2014-05-13 | 2014-05-13 | Large steel tube manufacturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104014986A true CN104014986A (en) | 2014-09-03 |
Family
ID=51432140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410199704.6A Pending CN104014986A (en) | 2014-05-13 | 2014-05-13 | Large steel tube manufacturing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104014986A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105583573A (en) * | 2014-10-20 | 2016-05-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Processing technology method of precise large-size rigid pipe assembly |
| CN109185590A (en) * | 2018-10-31 | 2019-01-11 | 江阴市扬子管件有限公司 | A kind of energy-saving, environment-friendly and high-efficiency concetrated pipe and its production technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60167724A (en) * | 1984-02-02 | 1985-08-31 | Toyota Motor Corp | Method of manufacturing outer cylinder of equal-speed joint |
| CN101342651A (en) * | 2008-08-18 | 2009-01-14 | 沪东中华造船(集团)有限公司 | Dehiscence-proof heating and thermal insulation welding method for rudder carrier soldering joint |
| CN101462191A (en) * | 2009-01-13 | 2009-06-24 | 中国建筑第六工程局有限公司 | Low temperature welding method between Q345D steel structure |
| CN101462190A (en) * | 2009-01-13 | 2009-06-24 | 中国建筑第六工程局有限公司 | Low temperature welding method between cast steel and low-alloy structural steel |
-
2014
- 2014-05-13 CN CN201410199704.6A patent/CN104014986A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60167724A (en) * | 1984-02-02 | 1985-08-31 | Toyota Motor Corp | Method of manufacturing outer cylinder of equal-speed joint |
| CN101342651A (en) * | 2008-08-18 | 2009-01-14 | 沪东中华造船(集团)有限公司 | Dehiscence-proof heating and thermal insulation welding method for rudder carrier soldering joint |
| CN101462191A (en) * | 2009-01-13 | 2009-06-24 | 中国建筑第六工程局有限公司 | Low temperature welding method between Q345D steel structure |
| CN101462190A (en) * | 2009-01-13 | 2009-06-24 | 中国建筑第六工程局有限公司 | Low temperature welding method between cast steel and low-alloy structural steel |
Non-Patent Citations (3)
| Title |
|---|
| 侯帅 等: "大口径直缝埋弧焊管生产技术与装备的新进展", 《钢管》 * |
| 姜鸿飞: "生产大口径直缝焊管的研究", 《鞍钢技术》 * |
| 王富永: "大内径输水钢管的制造工艺与质量控制", 《中国水利》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105583573A (en) * | 2014-10-20 | 2016-05-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Processing technology method of precise large-size rigid pipe assembly |
| CN109185590A (en) * | 2018-10-31 | 2019-01-11 | 江阴市扬子管件有限公司 | A kind of energy-saving, environment-friendly and high-efficiency concetrated pipe and its production technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140903 |
|
| RJ01 | Rejection of invention patent application after publication |