KR101790100B1 - Manufacturing method of multi-layered pipe for seamless steel pipe with low weight and high strength - Google Patents
Manufacturing method of multi-layered pipe for seamless steel pipe with low weight and high strength Download PDFInfo
- Publication number
- KR101790100B1 KR101790100B1 KR1020150110747A KR20150110747A KR101790100B1 KR 101790100 B1 KR101790100 B1 KR 101790100B1 KR 1020150110747 A KR1020150110747 A KR 1020150110747A KR 20150110747 A KR20150110747 A KR 20150110747A KR 101790100 B1 KR101790100 B1 KR 101790100B1
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- South Korea
- Prior art keywords
- pipe
- steel pipe
- diameter
- molding
- forming
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/16—Mandrels; Mounting or adjusting same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
- B21D39/048—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The present invention provides a method for manufacturing a weight reduction type multi-tube for forming high strength non-welded steel pipe. According to the method of manufacturing a multi-pipe for molding a heavy weight type high strength non-welded steel pipe according to the present invention, a plurality of steel pipes are pressed and joined together by a drawing process or a cold rolling process using a mold and a mandrel, It is possible to easily and easily manufacture a high strength non-steel pipe without increasing the thickness of the steel pipe, thereby reducing the weight of the high-strength pipe and reducing the manufacturing cost.
A method for manufacturing a weight reduction type high strength multimetal steel pipe for forming a multi-pipe according to the present invention is a method for manufacturing a heavy metal pipe having a molding hole portion 11 having an inner diameter equal to an outer diameter of an outer pipe (2) 10); The mandrel 20 having the molding surface portion 25a having the same outer diameter as the inner diameter of the inner tube 3 constituting the inner circumferential surface of the multi-gravity steel pipe 1 passes through the molding hole portion 11 of the mold 10 A mandrel positioning step disposed inside the inner tube material 3 '; An outer tube material 2 'and an inner tube material 3', which are formed into the outer tube 2 and the inner tube 3 of the multi-gravity steel pipe 1, are subjected to either one of a drawing process and a cold rolling process (2 ') in the course of passing through the molding hole portion (11) of the mold (10), and the multi-walled steel pipe (1) The outer diameter of the outer pipe 2 of the multifilamentary steel pipe 1 is reduced to the outer diameter of the outer pipe 2 and the molten metal passes through the molding surface portion 25a of the mandrel 20 positioned in the molding hole portion 11 of the mold 10 So that the inner diameter of the inner pipe material 3 'is reduced to the inner diameter of the inner pipe 3 of the multi-pipe type steel pipe 1.
Description
More particularly, the present invention relates to a method for manufacturing a multi-tube for forming a heavy weight type high strength non-welded steel pipe, and more particularly, to a method for manufacturing a multi- The present invention relates to a method of manufacturing a multi-pipe for molding a high strength non-welded steel pipe, which can easily and easily manufacture a high strength non-welded steel pipe without increasing the thickness of the pipe, thereby reducing the weight of the high- will be.
The pipe for conveying the high-pressure gas or the high-pressure fluid is made of a high-strength material capable of withstanding high pressure, or the thickness thereof is increased to increase the strength. Regarding the technique of manufacturing the high strength pipe by improving the physical properties of the pipe material, Korean Patent Registration No. 10-0361471 entitled "Ultra high strength line pipe excellent in low temperature toughness and manufacturing method thereof" There is a problem in that the manufacturing process is cumbersome and the pipe manufacturing cost is increased.
Further, in the technique of increasing the pipe strength by increasing the pipe thickness, there is a problem that the pipe weight increases, the material cost increases, and the pipe installation becomes difficult.
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SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method of manufacturing a steel pipe for a steel pipe, It is possible to manufacture a high strength non-steel pipe easily and easily without increasing the pipe thickness, and to reduce the weight of the high-strength pipe and to reduce the manufacturing cost, a new type of weight reduction type high strength non- And to provide a method for manufacturing a multi-tube for use in a pipe.
According to an aspect of the present invention for achieving the above object, the present invention provides a metal mold having a molding hole portion (11) having an inner diameter equal to an outer diameter of an outer tube (2) constituting an outer peripheral surface of a multi- The
The
The outer tubular material 2 'and the inner tubular material 3', which are formed into the
The outer diameter of the outer tube material 2 'is reduced to the outer diameter of the
A
A plurality of steel tubes including an
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According to the method of manufacturing a multi-pipe for forming a heavy-weight heavy-duty seamless steel pipe according to the present invention, it is possible to easily and easily manufacture a high strength non-pipe steel pipe without increasing the thickness of the pipe. .
1 is a block diagram illustrating a method for manufacturing a weight reduction type multi-pipe for forming high strength non-steel pipe according to an embodiment of the present invention;
FIG. 2 is a view showing a mold used in a method for manufacturing a weight reduction type high strength multimode steel pipe multi-pipe according to an embodiment of the present invention;
3 (a) and 3 (b) illustrate a drawing die and a roll die-forming die for a method of manufacturing a weight reduction type high strength multimode steel pipe multi-pipe according to an embodiment of the present invention;
4 (a) and 4 (b) illustrate a mandrel for a weight reduction type multi-tube manufacturing method for forming a high strength non-welded steel pipe according to an embodiment of the present invention;
5 (a) and 5 (b) illustrate how a multi-walled steel pipe is formed through a method for manufacturing a weight reduction type high strength seamless steel pipe according to an embodiment of the present invention;
6 (a) and 6 (b) are diagrams illustrating the formation of a multi-walled steel pipe through an outer pipe and an inner pipe having a zircon coating layer.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying
The method for manufacturing a multi-pipe for forming a heavy-weight type heavy-duty non-welded steel pipe according to the present invention comprises the steps of: forming an outer pipe (2) to form an outer circumferential surface of an ungrained steel pipe (1) Are joined to each other through a drawing process or a cold rolling process using a mold (10) and a mandrel (20) to mold a multi-core steel pipe (1) having high strength. For this purpose, a method for manufacturing a multi-pipe for forming a weight reduction type high strength non-welded steel pipe according to an embodiment of the present invention is performed through a mold-including step and a multi-tube forming step as shown in FIG.
The step of providing a mold is a step of providing a
The mandrel positioning step is a step of positioning the
The
The
The floating
The multi-tube forming step is carried out in such a manner that the outer tube material 2 'and the inner tube material 3', which are formed into the
Meanwhile, as shown in FIG. 6, the method for manufacturing a weight reduction type high strength multi-core steel pipe according to an embodiment of the present invention includes the steps of forming an inner circumferential surface of an outer pipe material 2 ' A
The method for manufacturing a weight reduction type high strength multimode steel pipe for forming multiple pipes according to an embodiment of the present invention having a structure as described above is characterized in that a plurality of steel pipes are connected to each other by a
As described above, the method for manufacturing a weight reduction type multi-tube for forming high strength non-welded steel pipe according to an embodiment of the present invention has been described with reference to the above description and drawings, but this is merely an illustrative example, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.
1: Multiple steel pipe 2: External pipe
2 ': outer tube material 3: inner tube
3 ': inner tube material 4: zirconium coating layer
10:
10b: roll die forming mold 11: molding hole portion
11a: Molding hole area inner circumferential surface 12: Molding hole introduction part
12a: Molding hole introduction part inner peripheral surface 13: Entrance space
14: discharge space 20: mandrel
20a: Fixed
21: main cylinder 22: distal end
23: rear end portion 24: connecting rod
25: forming
26: distal end 27:
28: guide portion 29: rear end portion
Claims (7)
The mandrel 20 having the molding surface portion 25a having the same outer diameter as the inner diameter of the inner tube 3 constituting the inner circumferential surface of the multi-gravity steel pipe 1 passes through the molding hole portion 11 of the mold 10 Shaped molding part (not shown) which is disposed inside the inner pipe material 3 'and has a molding surface part 25a parallel to the inner circumferential surface 11a forming the molding hole part 11 of the mold 10, 25); A tip portion 26 extending from the tip of the forming portion 25 and tapered to have a smaller diameter than the forming portion 25; The tapered angle is formed in a shape extending from the rear end of the forming part 25 to have a diameter larger than that of the forming part 25, (27) formed such that an inner circumferential surface (12a) thereof is smaller than a tapered angle; A guide portion 28 extending from the rear end of the introduction portion 27 and having a cylindrical shape larger in diameter than the molding portion 25; A floating mandrel 20b having a configuration including a rear end portion 29 extending from the rear end of the guide portion 28 and tapered so as to have a smaller diameter than the guide portion 28 is used as the mandrel 20 A mandrel placement step;
The outer tubular material 2 'and the inner tubular material 3', which are formed into the outer tube 2 and the inner tube 3 of the multi-gravity steel pipe 1, pass through the inside of the mold 10 by the drawing process (1), which are integrally joined to each other,
The outer diameter of the outer tube material 2 'is reduced to the outer diameter of the outer tube 2 of the multi-gauge steel pipe 1 in the course of passing through the molding hole portion 11 of the mold 10, The inner diameter of the inner tube material 3 'passing through the molding surface portion 25a of the mandrel 20 positioned in the molding hole portion 11 is reduced to the inner diameter of the inner tube 3 of the multi- And a plurality of tube forming steps,
A coating layer 4 made of zirconium material is formed on the inner circumferential surface of the outer tube material 2 'and the outer circumferential surface of the inner tube material 3' constituting the multi-gravity steel pipe 1, So,
A plurality of steel tubes including an outer tube 2 forming an outer peripheral surface and an inner tube 3 forming an inner peripheral surface are joined to each other through a drawing process using a mold 10 and a mandrel 20, A method for manufacturing a weight reduction type high strength non-welded steel pipe for forming a multiple pipe, characterized by molding the steel pipe (1).
Priority Applications (1)
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KR1020150110747A KR101790100B1 (en) | 2015-08-05 | 2015-08-05 | Manufacturing method of multi-layered pipe for seamless steel pipe with low weight and high strength |
Applications Claiming Priority (1)
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KR1020150110747A KR101790100B1 (en) | 2015-08-05 | 2015-08-05 | Manufacturing method of multi-layered pipe for seamless steel pipe with low weight and high strength |
Publications (2)
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KR20170017188A KR20170017188A (en) | 2017-02-15 |
KR101790100B1 true KR101790100B1 (en) | 2017-10-25 |
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KR1020150110747A KR101790100B1 (en) | 2015-08-05 | 2015-08-05 | Manufacturing method of multi-layered pipe for seamless steel pipe with low weight and high strength |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003112218A (en) * | 2001-09-28 | 2003-04-15 | Usui Internatl Ind Co Ltd | Method for manufacturing thick-wall thin-diameter tube |
JP2005104287A (en) * | 2003-09-30 | 2005-04-21 | Miyata Ind Co Ltd | Bicycle frame pipe and its processing method |
KR101175461B1 (en) * | 2008-02-08 | 2012-08-20 | 수미도모 메탈 인더스트리즈, 리미티드 | Drawing plug of pipe material and drawing method employing the plug |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3519966B2 (en) | 1999-01-07 | 2004-04-19 | 新日本製鐵株式会社 | Ultra-high-strength linepipe excellent in low-temperature toughness and its manufacturing method |
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2015
- 2015-08-05 KR KR1020150110747A patent/KR101790100B1/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003112218A (en) * | 2001-09-28 | 2003-04-15 | Usui Internatl Ind Co Ltd | Method for manufacturing thick-wall thin-diameter tube |
JP2005104287A (en) * | 2003-09-30 | 2005-04-21 | Miyata Ind Co Ltd | Bicycle frame pipe and its processing method |
KR101175461B1 (en) * | 2008-02-08 | 2012-08-20 | 수미도모 메탈 인더스트리즈, 리미티드 | Drawing plug of pipe material and drawing method employing the plug |
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KR20170017188A (en) | 2017-02-15 |
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