CN114473391A - Rapid production method of steel pipe - Google Patents
Rapid production method of steel pipe Download PDFInfo
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- CN114473391A CN114473391A CN202210212020.XA CN202210212020A CN114473391A CN 114473391 A CN114473391 A CN 114473391A CN 202210212020 A CN202210212020 A CN 202210212020A CN 114473391 A CN114473391 A CN 114473391A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention belongs to the field of production of cold-bending steel, and particularly relates to a rapid production method of a steel pipe, which comprises the following steps: step S10: removing impurities on the steel plate; step S20: adding water with the volume of eleven dozens of reference steel pipes into the reference steel pipes, then sealing two ends of the reference steel pipes, and then freezing; step S30: taking out the frozen reference steel pipe, and bending the steel plate into a C shape by taking the reference steel pipe as the inner diameter to obtain a semi-finished product; step S40: placing the semi-finished product with an opening upward, taking out ice in the reference steel pipe, and placing the ice in the semi-finished product; step S50: taking a supplementary steel bar on ice, and then welding the exterior and the interior of the semi-finished product in sequence; step S60: and polishing the welding seam to obtain a finished steel pipe. The scheme adopts cold bending forming and has various ultra-thin sections which cannot be produced by hot rolling and have reasonable and complex shapes. Meanwhile, the arrangement of the supplement steel bars does not need to bend the gap of the steel pipe very little, good welding can be realized, and the bending requirement is low.
Description
Technical Field
The scheme belongs to the field of production of cold-bending section steel, and particularly relates to a rapid production method of a steel pipe.
Background
The cold-formed steel is the main material for manufacturing light steel structures. It has various very thin, reasonable and complicated cross sections which can not be produced by hot rolling. Compared with hot-rolled section steel, under the condition of the same cross-sectional area, the turning radius can be increased by 50-60%, and the section inertia moment can be increased by 0.5-3.0 times, so that the material strength can be reasonably utilized; compared with a common steel structure (namely a steel structure made of traditional I-shaped steel, channel steel, angle steel and steel plates), the steel can be saved by about 30-50%. In some cases, the steel consumption of the cold-formed steel structure is equivalent to that of a reinforced concrete structure under the same condition, and the cold-formed steel structure is an economic section steel.
In general, a bending portion needs to be heated to ensure a bending ratio so as to facilitate bending, and a cold-bending steel pipe is bent at a low temperature as much as possible. And after bending, welding to form a closed-loop steel pipe, then grinding, and then shaping. The problem that exists at present is that when welding, the seam of steel pipe should not be too big, and the seam is bigger, and the degree of difficulty of welding just is higher. However, the smaller the gap, the higher the bending requirement.
Therefore, a method for producing a steel pipe with low bending requirement and suitable for cold bending steel is urgently needed.
Disclosure of Invention
The purpose of this scheme is to provide a steel pipe production method that the requirement is low to the bending.
In order to achieve the aim, the scheme provides a rapid production method of a steel pipe, which comprises the following steps:
step S10: removing impurities on the steel plate;
step S20: adding water with the volume of eleven dozens of reference steel pipes into the reference steel pipes, then sealing two ends of the reference steel pipes, and then freezing;
step S30: taking out the frozen reference steel pipe, and bending the steel plate into a C shape by taking the reference steel pipe as the inner diameter to obtain a semi-finished product;
step S40: placing the semi-finished product with an opening upward, taking out ice in the reference steel pipe, and placing the ice in the semi-finished product;
step S50: taking a supplementary steel bar on ice, and then welding the exterior and the interior of the semi-finished product in sequence;
step S60: and polishing the welding seam to obtain a finished steel pipe.
The principle and the beneficial effect of the scheme are that: the scheme adopts cold bending forming and has various ultra-thin sections which cannot be produced by hot rolling and have reasonable and complex shapes. Meanwhile, the arrangement of the supplement steel bars does not need to bend the gap of the steel pipe very little, good welding can be realized, and the bending requirement is low.
In addition, the use of ice as a support for the supplemental steel bars has two benefits: firstly, ice exists in the step S20, and a special support is not needed; secondly, a lot of welding slag is generated during welding, the welding slag falls onto other supports and is difficult to remove, but if the welding slag is ice, the welding slag is easy to separate; thirdly, welding slag generated after welding has high temperature, and ice can also play a good cooling effect.
The ice in the reference steel pipe is water with the volume of eleven-tenth of that of the reference steel pipe, because the water is condensed into ice, the volume is increased, and the situation that the reference steel pipe is damaged due to too much increase of the volume is avoided. On one hand, the addition of ice can increase the strength of the reference steel pipe and ensure the bending effect; on the other hand, the cooling effect is achieved, bending in a low-temperature environment is guaranteed, construction in the low-temperature environment is not needed, and the operation is simple and the cost is lower.
Further, the wall thickness of the reference steel pipe is smaller than the thickness of the steel plate. Set up like this down, after the replenishment billet is put into ice, the replenishment billet can descend a bit distance, and in the welded time, only need fill the part that descends just like this, it is easier to weld, and when polishing, only need polish the unnecessary part of splice, can reduce the intensity of polishing by a wide margin.
Further, step S45 is included, a steel pad is padded under the ice to raise the position of the ice, and the thickness of the supplementary steel bar is smaller than that of the steel plate. If the ice position is not heightened, redundant supplement steel bars need to be cut off during polishing, the operation is troublesome, and the polishing strength is high. After the position of the ice is raised, the polishing strength of the inner ring of the steel pipe can be effectively reduced.
Further, the method includes step S15 of performing ultrasonic flaw detection on the steel pipe and screening out a steel plate meeting the quality requirements. Ensure the quality of the steel pipe
Further, step S20 is replaced with: filling water into the reference steel pipe, sealing both ends of the reference steel pipe with elastic films, and freezing. This has the advantage that the water can be directly filled without controlling the amount of water added, and if the water condenses to ice and expands in volume, the elastic membrane deforms and does not damage the reference steel tube.
Further, step S55 is included, the remaining ice is melted, filtered and reused, and the welding slag is collected. Thus, the operation is energy-saving and environment-friendly.
Further, step S48 is included, a block of padding ice is taken out and put into the opening of the semi-finished product, so that the height of the padding ice is higher than the lowest position of the opening and lower than the highest position of the opening, and the thickness of the supplementary steel bar is smaller than that of the steel plate. Set up down like this, when polishing, no matter inside and outside polish, only need polish the splice can, need not to cut the supplementary billet, at first difficult damage steel pipe, operating strength has also obtained reducing by a wide margin in addition.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 5 is a schematic structural diagram of embodiment 1 of the present invention.
Detailed Description
The following is further detailed by the specific embodiments:
reference numerals in the drawings of the specification include: the steel plate 10, the ice 20, the reference steel pipe 30, the supplementary steel bar 40, the steel mat 50 and the ice 60.
Example 1 is substantially as shown in figures 1 to 5 of the accompanying drawings:
the embodiment provides a method for quickly producing a steel pipe, which comprises the following steps:
step S10: removing impurities on the steel plate 10;
step S15: carrying out ultrasonic flaw detection on the steel pipe, and screening out the steel plate 10 meeting the quality requirement, so that the quality of the steel pipe can be ensured;
step S20: adding water of a volume of eleven and twelve reference steel pipes 30 into the reference steel pipes 30, then sealing both ends of the reference steel pipes 30, and then freezing;
step S30: taking out the frozen reference steel pipe 30, and bending the steel plate 10 into a C shape by taking the reference steel pipe 30 as the inner diameter to obtain a semi-finished product;
step S40: placing the semi-finished product with an opening upward, taking out the ice 20 in the reference steel pipe 30, and placing the ice in the semi-finished product;
step S45, the steel mat 50 is padded under the ice 20 to lift the ice 20, and the thickness of the supplement steel strip 40 is less than that of the steel plate 10. If the ice 6020 is not raised, the extra steel bar 40 needs to be cut off during grinding, which is troublesome and has high grinding strength. After the position of the ice 20 is raised, the grinding strength of the inner ring of the steel pipe can be effectively reduced.
Step S48: taking out a piece of padding ice 6020, and putting into the opening of the semi-finished product to make the height of the padding ice higher than the lowest part of the opening and lower than the highest part of the opening, wherein the thickness of the supplement steel bar 40 is less than that of the steel plate 10. Set up down like this, when polishing, no matter inside and outside polish, only need polish the splice can, need not to cut supplementary billet 40, at first difficult damage steel pipe, operating strength has also obtained reducing by a wide margin in addition.
Step S50: taking a supplementary steel bar 40 on the ice 20, and then performing external and internal welding on the semi-finished product in sequence;
step S60: and polishing the welding seam to obtain a finished steel pipe.
The scheme adopts cold bending forming and has various ultra-thin sections which cannot be produced by hot rolling and have reasonable and complex shapes. Meanwhile, the arrangement of the supplement steel bars 40 does not need to bend the gap of the steel pipe very little, good welding can be realized, and the bending requirement is low.
In addition, using ice 20 as a support for the supplemental steel bars 40 has two benefits: firstly, in step S20, there is ice 20 without special support; secondly, a lot of welding slag is generated during welding, the welding slag falls into other supports and is difficult to remove, but if the welding slag is ice 20, the welding slag is easy to separate; thirdly, welding slag generated after welding has high temperature, and the ice 20 can also play a good cooling effect.
The ice 20 in the reference steel tube 30 is water in a volume of eleven tenths of the reference steel tube 30 because the ice 20 is condensed by the water and the volume is increased, thereby preventing the reference steel tube 30 from being crushed by the excessive increase of the volume. On one hand, the addition of the ice 20 can increase the strength of the reference steel pipe 30 and ensure the bending effect; on the other hand, the cooling effect is achieved, bending in a low-temperature environment is guaranteed, construction in the low-temperature environment is not needed, and the operation is simple and the cost is low.
Example 2
The present embodiment differs from embodiment 1 in that step S20 is replaced with: after filling the reference steel pipe 30 with water, both ends of the reference steel pipe 30 are sealed with elastic films, and then frozen. This has the advantage that the water can be directly filled without controlling the amount of water to be added, and if the water condenses to ice 20 and expands in volume, the elastic film deforms without damaging the reference steel pipe 30.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. A rapid production method of a steel pipe is characterized in that: the method comprises the following steps:
step S10: removing impurities on the steel plate;
step S20: adding water with the volume of eleven dozens of reference steel pipes into the reference steel pipes, then sealing two ends of the reference steel pipes, and then freezing;
step S30: taking out the frozen reference steel pipe, and bending the steel plate into a C shape by taking the reference steel pipe as the inner diameter to obtain a semi-finished product;
step S40: placing the semi-finished product with an opening upward, taking out ice in the reference steel pipe, and placing the ice in the semi-finished product;
step S50: taking a supplementary steel bar on ice, and then welding the exterior and the interior of the semi-finished product in sequence;
step S60: and polishing the welding seam to obtain a finished steel pipe.
2. A method for the rapid production of steel pipes according to claim 1, characterized in that: and the wall thickness of the reference steel pipe is smaller than that of the steel plate.
3. A method for the rapid production of steel pipes according to claim 2, characterized in that: and a step S45 of padding the steel padding with the padding height below the ice to lift the position of the ice, wherein the thickness of the supplementary steel bar is less than that of the steel plate.
4. A method for the rapid production of steel pipes according to claim 1, characterized in that: and step S15, carrying out ultrasonic flaw detection on the steel pipe, and screening out steel plates meeting the quality requirements.
5. A method for the rapid production of steel pipes according to claim 1, characterized in that: step S20 is replaced with: filling water into the reference steel pipe, sealing both ends of the reference steel pipe with elastic films, and freezing.
6. A method for the rapid production of steel pipes according to claim 1, characterized in that: and the method also comprises a step S55 of melting the residual ice, filtering and recycling the ice, and collecting the welding slag.
7. A method for the rapid production of steel pipes according to claim 1, characterized in that: and step S48, taking out a piece of heightening ice, and putting the heightening ice into the opening of the semi-finished product to enable the height of the heightening ice to be higher than the lowest part of the opening and lower than the highest part of the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210212020.XA CN114473391B (en) | 2022-03-04 | 2022-03-04 | Rapid production method of steel pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210212020.XA CN114473391B (en) | 2022-03-04 | 2022-03-04 | Rapid production method of steel pipe |
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| CN114473391A true CN114473391A (en) | 2022-05-13 |
| CN114473391B CN114473391B (en) | 2022-09-20 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2213787A1 (en) * | 1996-08-23 | 1998-02-23 | Brent Mcneese | Method for fabricating box headers for use in air cooled heat exchangers |
| CN101537447A (en) * | 2009-04-15 | 2009-09-23 | 哈尔滨工业大学 | Pipe liquid filled shear bending and forming method |
| US20170159538A1 (en) * | 2015-12-04 | 2017-06-08 | Nakagawa Sangyo Co., Ltd. | Method for manufacturing a double pipe |
| CN110170806A (en) * | 2019-06-18 | 2019-08-27 | 江苏福莱斯伯汽车零件制造有限公司 | EGR cooling cycle pipe and its processing technology |
| CN214488409U (en) * | 2021-03-01 | 2021-10-26 | 一重集团(黑龙江)重工有限公司 | Thin-wall pipeline cold bending device |
-
2022
- 2022-03-04 CN CN202210212020.XA patent/CN114473391B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2213787A1 (en) * | 1996-08-23 | 1998-02-23 | Brent Mcneese | Method for fabricating box headers for use in air cooled heat exchangers |
| CN101537447A (en) * | 2009-04-15 | 2009-09-23 | 哈尔滨工业大学 | Pipe liquid filled shear bending and forming method |
| US20170159538A1 (en) * | 2015-12-04 | 2017-06-08 | Nakagawa Sangyo Co., Ltd. | Method for manufacturing a double pipe |
| CN110170806A (en) * | 2019-06-18 | 2019-08-27 | 江苏福莱斯伯汽车零件制造有限公司 | EGR cooling cycle pipe and its processing technology |
| CN214488409U (en) * | 2021-03-01 | 2021-10-26 | 一重集团(黑龙江)重工有限公司 | Thin-wall pipeline cold bending device |
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| CN114473391B (en) | 2022-09-20 |
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