CN102078888A - Method for manufacturing steel pipe with long round section - Google Patents
Method for manufacturing steel pipe with long round section Download PDFInfo
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- CN102078888A CN102078888A CN 201010607159 CN201010607159A CN102078888A CN 102078888 A CN102078888 A CN 102078888A CN 201010607159 CN201010607159 CN 201010607159 CN 201010607159 A CN201010607159 A CN 201010607159A CN 102078888 A CN102078888 A CN 102078888A
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Abstract
The invention relates to a method for manufacturing a steel pipe with a large caliber and a thick wall, in particular to a manufacturing a steel pipe with a long round section. The method comprises the following steps: determining the blanking length according to the pipe diameter, plate thickness and steel plate elongation, performing blanking according to the development size of a middle longitude, and reserving pressure head connecting margins at two ends; connecting a pressure head on the blanked material and curving the pressure head by virtue of a plate bending machine; shoveling a groove for the net material after primary curving in the previous step and performing secondary curving of the pressure head by virtue of the plate bending machine; performing pipe reeling and forming on the material after the secondary curving by virtue of the plate bending machine; if the pipe diameter of the reeled long round pipe is qualified according to quality inspection, performing longitudinal joint welding by submerged-arc welding; and after the welding is finished, repairing welding deformation by flame correction or a back-rolling bed. According to the invention, as the cylindrical section is subjected to integral blanking, the half pressure head material of the cylindrical section and a half welding material are saved, the steel material loss of a longitudinal joint is reduced, and the welding and repairing time of a welding joint is shortened at the same time. One full penetration longitudinal joint of the cylindrical section is reduced, the overall performance of the cylindrical section is enhanced, and the appearance quality is improved.
Description
Technical field
The present invention relates to the preparation method of large diameter thick wall steel pipe, specifically is a kind of long round section steel pipe manufacturing method.
Background technology
The preparation method of traditional long round section steel pipe is: this kind pipe is divided into two lobe blankings from the cross section straight section, roll into semicircle respectively after, be welded into whole Long Circle again.Its defective is: the twice melt-through weld, and consumption wlding amount is big, and it is long to take man-hour; The whole Long Circle that is spliced into is subjected to the dimensional discrepancy of two and half shapes, distortion and the weld seam effect of contraction that the twice weld seam causes, and dimensional accuracy is difficult for guaranteeing, corrects and repairs length consuming time.
Summary of the invention
The present invention is intended to solve the problems referred to above that prior art exists, and can shorten the manufacturing cycle and provide a kind of, reduces the place area occupied, reduce former material consumption, raise labour efficiency, improve and stabilized product quality the long round section steel pipe manufacturing method that reduces cost.
The technical scheme that the present invention solves described problem employing is: a kind of long round section steel pipe manufacturing method, carry out as follows:
A. blanking: determine cutting length according to caliber, thickness of slab and steel plate percentage elongation, through the development size blanking, two ends are reserved and are connect the pressure head surplus in pressing;
B. once bent arc: the material that will descend connects behind the pressure head march arc voltage head on veneer reeling machine;
C. the bent arc of secondary: will on veneer reeling machine, carry out the bent arc voltage head of secondary behind the once bent arc of previous step behind the clean material shovel groove;
D. pipe crimping moulding: the material behind the bent arc of secondary is carried out the pipe crimping moulding on veneer reeling machine;
E. weld longitudinal joint: the oval pipe that will spool adopts submerged-arc welding to carry out longitudinal seam welding after the quality inspection passed examination;
F. degree of lip-rounding arrangement: welding is finished and is carried out the welding deformation repairing, adopts flame correction or adopts back the roller bed to repair.
The present invention has compared following advantage with conventional method:
1. save material.
ⅰ. shell ring adopts a slice blanking, saves half shell ring pressure head material than former method, also saves the loss of one longitudinal joint steel simultaneously.
ⅱ. shell ring has only longitudinal joint one, saves half welding material than former method.
2. save time.
ⅰ. shell ring adopts a slice blanking, reduces than former method and opens longitudinal joint groove activity time together.
ⅱ. shell ring has only longitudinal joint one, has reduced the welding and the repairing time of one weld seam than former method.
3. improve the quality.
ⅰ. shell ring moulding sectional dimension precision height
ⅱ. shell ring reduces the full penetration longitudinal joint one, has improved the shell ring overall performance.
ⅲ. shell ring has only longitudinal joint one, helps guaranteeing weld seam and the cylinder part relation that staggers, and has also improved impression quality.
Description of drawings
Fig. 1 is a process chart of the present invention.
Fig. 2 is a slice steel plate cutting schematic diagram of the present invention.
Fig. 3 is the once bent arc voltage head of a present invention schematic diagram.
Fig. 4 is the bent arc voltage head of secondary of the present invention schematic diagram.
Fig. 5 pipe crimping shaping schematic view of the present invention.
Fig. 6 is a longitudinal seam welding schematic diagram of the present invention.
Fig. 7 is degree of lip-rounding arrangement schematic diagram of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
Present embodiment is that the steel pipe of φ 1600-2200 * 50 is an example with the cross section, the following (see figure 1) of its technological process:
1. blanking: determine cutting length according to caliber, thickness of slab and steel plate percentage elongation, through the development size blanking, blanking notices that two ends are reserved and connects the pressure head surplus in pressing, as shown in Figure 2.
2. once bent arc: the material that will descend connects behind the pressure head march arc voltage head on veneer reeling machine, as shown in Figure 3.
3. the bent arc of secondary: will on veneer reeling machine, carry out the bent arc voltage head of secondary behind the once bent arc of previous step behind the clean material shovel groove, as shown in Figure 4.
4. pipe crimping moulding: the material behind the bent arc of secondary is carried out the pipe crimping moulding on veneer reeling machine, as shown in Figure 5.
5. longitudinal seam welding: the oval pipe of spooling adopts submerged-arc welding to carry out longitudinal seam welding after the quality inspection passed examination, as shown in Figure 6.
6. degree of lip-rounding arrangement: welding is finished and is carried out the welding deformation repairing, adopts flame correction or adopts back the roller bed to repair, and carries out next procedure after size is qualified, as shown in Figure 7.
Claims (1)
1. long round section steel pipe manufacturing method, carry out as follows:
A. blanking: determine cutting length according to caliber, thickness of slab and steel plate percentage elongation, through the development size blanking, two ends are reserved and are connect the pressure head surplus in pressing;
B. once bent arc: the material that will descend connects behind the pressure head march arc voltage head on veneer reeling machine;
C. the bent arc of secondary: will on veneer reeling machine, carry out the bent arc voltage head of secondary behind the once bent arc of previous step behind the clean material shovel groove;
D. pipe crimping moulding: the material behind the bent arc of secondary is carried out the pipe crimping moulding on veneer reeling machine;
E. weld longitudinal joint: the oval pipe that will spool adopts submerged-arc welding to carry out longitudinal seam welding after the quality inspection passed examination;
F. degree of lip-rounding arrangement: welding is finished and is carried out the welding deformation repairing, adopts flame correction or adopts back the roller bed to repair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010607159 CN102078888A (en) | 2010-12-27 | 2010-12-27 | Method for manufacturing steel pipe with long round section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010607159 CN102078888A (en) | 2010-12-27 | 2010-12-27 | Method for manufacturing steel pipe with long round section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102078888A true CN102078888A (en) | 2011-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010607159 Pending CN102078888A (en) | 2010-12-27 | 2010-12-27 | Method for manufacturing steel pipe with long round section |
Country Status (1)
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| CN (1) | CN102078888A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266884A (en) * | 2011-07-25 | 2011-12-07 | 江苏华阳金属管件有限公司 | Thick-wall straight tube joint technology |
| CN102284551A (en) * | 2011-08-02 | 2011-12-21 | 太原华科信冶金成套设备有限公司 | Straight submerged arc welded pipe flexible forming method and equipment |
| CN102847743A (en) * | 2012-09-20 | 2013-01-02 | 上海和达汽车配件有限公司 | Manufacture method of pipe different in wall thickness |
| CN102873148A (en) * | 2012-09-29 | 2013-01-16 | 北京航星机器制造公司 | Simple bending method of large-diameter thin-walled aluminum tube |
| CN102974988A (en) * | 2012-12-03 | 2013-03-20 | 西安航天动力机械厂 | Drum coiling and forming method based on spin forming blank manufacture |
| CN103921076A (en) * | 2014-04-29 | 2014-07-16 | 中国二十二冶集团有限公司 | Rolling method for circular tube |
| CN105081683A (en) * | 2014-05-23 | 2015-11-25 | 天津市管道工程集团有限公司 | Machining technology of straight-seam steel reel pipe |
| CN113523731A (en) * | 2021-08-12 | 2021-10-22 | 东台耀强机械制造有限公司 | High-quality patterned steel plate pipe coiling process |
| CN114509335A (en) * | 2020-11-16 | 2022-05-17 | 中国石油天然气集团有限公司 | Method for detecting Bauschinger effect value of steel plate for welded pipe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4491004A (en) * | 1980-08-18 | 1985-01-01 | Ivanoff Osmo O | Apparatus for manufacturing a metal pipe |
-
2010
- 2010-12-27 CN CN 201010607159 patent/CN102078888A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4491004A (en) * | 1980-08-18 | 1985-01-01 | Ivanoff Osmo O | Apparatus for manufacturing a metal pipe |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266884A (en) * | 2011-07-25 | 2011-12-07 | 江苏华阳金属管件有限公司 | Thick-wall straight tube joint technology |
| CN102284551A (en) * | 2011-08-02 | 2011-12-21 | 太原华科信冶金成套设备有限公司 | Straight submerged arc welded pipe flexible forming method and equipment |
| CN102847743A (en) * | 2012-09-20 | 2013-01-02 | 上海和达汽车配件有限公司 | Manufacture method of pipe different in wall thickness |
| CN102873148A (en) * | 2012-09-29 | 2013-01-16 | 北京航星机器制造公司 | Simple bending method of large-diameter thin-walled aluminum tube |
| CN102974988A (en) * | 2012-12-03 | 2013-03-20 | 西安航天动力机械厂 | Drum coiling and forming method based on spin forming blank manufacture |
| CN102974988B (en) * | 2012-12-03 | 2015-04-08 | 西安航天动力机械厂 | Drum coiling and forming method based on spin forming blank manufacture |
| CN103921076A (en) * | 2014-04-29 | 2014-07-16 | 中国二十二冶集团有限公司 | Rolling method for circular tube |
| CN105081683A (en) * | 2014-05-23 | 2015-11-25 | 天津市管道工程集团有限公司 | Machining technology of straight-seam steel reel pipe |
| CN114509335A (en) * | 2020-11-16 | 2022-05-17 | 中国石油天然气集团有限公司 | Method for detecting Bauschinger effect value of steel plate for welded pipe |
| CN114509335B (en) * | 2020-11-16 | 2024-04-30 | 中国石油天然气集团有限公司 | Method for detecting Bactger effect value of steel plate for welded pipe |
| CN113523731A (en) * | 2021-08-12 | 2021-10-22 | 东台耀强机械制造有限公司 | High-quality patterned steel plate pipe coiling process |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110601 |