CN105246613A - Method for producing steel pipe - Google Patents
Method for producing steel pipe Download PDFInfo
- Publication number
- CN105246613A CN105246613A CN201380076836.3A CN201380076836A CN105246613A CN 105246613 A CN105246613 A CN 105246613A CN 201380076836 A CN201380076836 A CN 201380076836A CN 105246613 A CN105246613 A CN 105246613A
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- expander
- ratio
- outer peripheral
- radius
- 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.)
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Classifications
-
- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
- B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
-
- 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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
-
- 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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/14—Recontouring
-
- 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
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
-
- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
This method for producing a steel pipe (P) includes: a molding step for molding a steel plate into a cylindrical shape by means of a bending press method in which the steel plate is reduced by means of a punch (2), which has an outer peripheral surface having an arc-shaped cross section at the tip, in a manner so that both ends in the widthwise direction of the steel plate face each other; a welding step for abutting and welding the ends in the widthwise direction of the steel plate; and a tube expansion step for performing tube expansion from the inside of the steel pipe using a tube expander (11) at which are disposed in the peripheral direction a plurality of tube-expanding dies (16) having an outer peripheral surface that has an arc-shaped cross section. The tube expansion R ratio, which is the ratio of the radius of curvature of the outer peripheral surface of the tube expansion dies to the target radius of the inner surface of the steel pipe, and the punch R ratio, which is the ratio of the radius of curvature of the outer peripheral surface of the punch tip to the target radius of the inner peripheral surface of the steel pipe, are both less than 1, and the tube expansion R ratio and the punch R ratio satisfy a predetermined conditional formula. As a result, it is possible to produce a steel pipe having high circularity without causing crack damage to the tube expansion dies.
Description
Technical field
The present invention relates to the manufacture method comprising and use pipe expander from inner side, steel pipe to be carried out to the steel pipe of the expander operation of expander, described pipe expander is configured with multiple expanding dies of the outer peripheral face with circular arc cross-sections at circumferencial direction.
Background technology
Usually, the manufacturing process of the UOE steel pipe of pipe for oil well use, line pipe (linepipe) use etc. comprises following operation: the operation implementing retaining wall on slope (edgepreparation) in the width end as raw-material steel plate; Use after C type stamping machine carries out the bending of width end of steel plate, use U-shaped and O type stamping machine with the molding procedure making the width end of steel plate mode opposite each other steel plate is shaped to drum; The steel plate of restrained circle barrel shape, the width end of opposed steel plate to be docked and the tack welding operation of tack welding each other; By submerged arc welding method, the formal welding sequence of seam weldering is implemented to outside in the docking section of steel plate; And by using pipe expander to carry out expander thus the expander operation of the roundness, straightness and the outside dimension that are regulation by steel pipe forming from the inner side of steel pipe, described pipe expander is configured with multiple expanding dies of the outer peripheral face with circular arc cross-sections at circumferencial direction.
In addition, in the manufacture method of the welded still pipe such as pipe for oil well use, line-pipes, as with the molding procedure making the width end of steel plate mode opposite each other steel plate is shaped to drum, be not the method using U-shaped and O type stamping machine to implement forming U shaped articles and O forming, usually use following press-bending method yet: its with drift to depressing separating the steel plate that the punch die of 2 linearities of certain interval and configured in parallel loads.When adopting press-bending method, compared with implementing the situation of forming U shaped articles, O forming, the number of times of punching press increases, but can complete by less depressing force.Therefore, press-bending method is particularly suited for manufacturing the situation of steel pipe of thick material, high-strength material.
For the UOE steel pipe of pipe for oil well use, line-pipes, by utilizing circumference soldering, the pipe end of UOE steel pipe being engaged with each other in laying place, using UOE steel pipe thus.Therefore, when the roundness of UOE steel pipe is low, the pipe end of UOE steel pipe cannot be docked each other and engage during circumference soldering.And when the roundness of UOE steel pipe is low, when being layed under the hyperbaric environments such as deep-sea by UOE steel pipe, steel pipe is easily out of shape because of pressure.For such background, propose the technology (with reference to patent document 1 to 4) of the roundness improving UOE steel pipe in expander operation.
At first technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2010-167440 publication
Patent document 2: Japanese Unexamined Patent Publication 03-094936 publication
Patent document 3: Japanese Laid-Open Patent Publication 59-183943 publication
Patent document 4: Japanese Laid-Open Patent Publication 61-147930 publication
Summary of the invention
Invent problem to be solved
In order to improve the roundness of UOE steel pipe, wish that the ratio (following, be denoted as expander R ratio) of the radius of curvature R 1 of the outer peripheral face of expanding die relative to the radius of target R0 of the inner surface of UOE steel pipe is close to 1.0.But expander R ratio is more close to 1.0, then expanding die is larger relative to the contact of the inner surface of UOE steel pipe, and therefore expanding die can crack damage (crackdamage).Therefore, in expander operation in the past, expander R ratio is restricted to about 0.9, is difficult to the roundness improving UOE steel pipe further.For such background, expect to provide a kind of expanding die that can not make to crack the technology damaged and just can manufacture the high steel pipe of roundness.
The present invention makes in view of above-mentioned problem, its object is to, and provides a kind of expanding die that can not make to crack the manufacture method damaged and just can manufacture the high steel pipe of roundness.
For solving the means of problem
The manufacture method of the manufacture method steel pipe of steel pipe of the present invention, comprises following operation:
Molding procedure, adopt buckling mode to be drum by steel plate forming, described buckling mode is the drift utilizing top ends to have the outer peripheral face of circular arc cross-sections, depresses steel plate to make the width end of steel plate mode opposite each other;
Welding sequence, welds ground connection each other by the width end of steel plate;
Expander operation, use pipe expander to carry out expander from the inner side of steel pipe, described pipe expander is configured with multiple expanding dies of the outer peripheral face with circular arc cross-sections at circumferencial direction,
The radius of curvature of the outer peripheral face of expanding die is less than 1 relative to the ratio of the radius of target of the inner surface of steel pipe and drift R than all relative to the radius of curvature of the ratio of the radius of target of the inner surface of described steel pipe and the expander R when outer peripheral face in punch tip portion, expander R when drift R than meeting following mathematical expression (1)
[mathematical expression 1]
Expander R ratio >=﹣ 0.3 × drift R is than+1.18 (1).
The manufacture method of steel pipe of the present invention, in such scheme, described expander R is than being in more than 0.94 and being less than in the scope of 1.0.
Invention effect
According to the manufacture method of steel pipe of the present invention, expanding die can not be made to crack damage and just can manufacture the high steel pipe of roundness.
Accompanying drawing explanation
Fig. 1 is the concept map of the flow process of the molding procedure represented as the buckling mode in the manufacture method of the steel pipe of one embodiment of the present invention.
Fig. 2 is the schematic diagram of the structure representing the pipe expander used in the manufacture method as the steel pipe of one embodiment of the present invention.
Fig. 3 is the schematic diagram in the cross section representing steel pipe.
Fig. 4 be represent make expander R than be 0.903, by the external diameter of steel pipe after the steel pipe expander after shaping by the molding procedure of buckling mode and the figure of internal diameter.
Fig. 5 be represent make expander R than be 0.986, by the external diameter of steel pipe after the steel pipe expander after shaping by the molding procedure of buckling mode and the figure of internal diameter.
Fig. 6 be represent expander R when drift R than with the figure of the relation of the roundness of steel pipe.
Fig. 7 be represent expander R when drift R than with the figure of the relation of the roundness of steel pipe.
Detailed description of the invention
The present inventor is through further investigation, found that, replacing, punch forming that is U-shaped, O type is (following, be denoted as UO technique) and adopt the molding procedure of buckling mode (being also denoted as pressbend mode) when, excellent when the shape ratio of the steel pipe of seam postwelding has carried out UO technique.Therefore, even if obtain increasing expander R ratio, expanding die compared with when carrying out UO technique also can not damage this opinion by crackle.Think that this is for following mechanism.In the molding procedure of buckling mode, plate width as raw-material steel plate is carried out punch forming with being divided into multiple position, therefore for circumference when being shaped to tube shape, even if having tiny concavo-convex on the whole, non-variant part also can not longer ground continuously.On the other hand, when UO technique, U-shaped and the shaping of O type is carried out once respectively, and therefore according to the difference of punching press condition, in the circumference sometimes when being shaped to tube shape, the longer ground of non-variant part continuously.If circumference there is non-variant part, then the expanding die pressing this non-variant part when expander applies very large load, therefore easy Crack Damage.Make with larger area when expander that the outer peripheral face of expanding die contacts with steel pipe internal-surface, expander R is larger close to 1, then this phenomenon is more remarkable.But, with the shaping steel pipe of buckling mode, in the circumferential non-variant part can not longer ground continuously, therefore thinking compared with during UO technique, even if expander R is than becoming large, expanding die also can be made to implement expander operation with cracking damage.Hereinafter, with reference to the accompanying drawings of the manufacture method of the steel pipe of the one embodiment of the present invention expected based on above-mentioned opinion.
(molding procedure of buckling mode)
First, with reference to Fig. 1, the flow process of the molding procedure as the buckling mode in the manufacture method of the steel pipe of one embodiment of the present invention is described.Fig. 1 is the concept map of the flow process of the molding procedure represented as the buckling mode in the manufacture method of the steel pipe of one embodiment of the present invention.Arrow in Fig. 1 represents the action of steel plate S, drift 2.
As shown in Figure 1, when steel plate S being shaped to drum by buckling mode, the exterior side of supporting steel plate S on punch die 1a, the 1b of 2 linearities separating certain interval ground configured in parallel, depress the position of the inner surface side of the steel plate S corresponding with the gap between punch die 1a, 1b simultaneously with drift 2, repeat above-mentioned pressure action from the width both ends of steel plate S towards width central part.Thereby, it is possible to steel plate S is shaped to drum.
(structure of pipe expander)
Then, with reference to Fig. 2,3, the structure of the pipe expander used in the manufacture method as the steel pipe of one embodiment of the present invention is described.Fig. 2 is the schematic diagram of the structure representing the pipe expander used in the manufacture method as the steel pipe of one embodiment of the present invention.Fig. 3 is the schematic diagram in the cross section representing steel pipe.But the structure of pipe expander used in the present invention is not limited to the structure shown in Fig. 1,2.
As shown in Figure 2, the pipe expander 11 used in the manufacture method as the steel pipe of one embodiment of the present invention possesses: the semi-girder (boom) 12 of the shaft-like that top is inserted from one end of steel pipe P; And be located at the top of semi-girder 12, steel pipe P is carried out to the expander head 14 of expander when expanding to axle right angle orientation.Expander head 14 comprises tapered outer circumferential surfaces 15 and expanding die 16.
Tapered outer circumferential surfaces 15 is located at the top of semi-girder 12, from the tip side of semi-girder 12 to base end side undergauge.Expanding die 16 comprises and slidingly contacting with tapered outer circumferential surfaces 15, from the tip side of semi-girder 12 to the tapered inner circumferential surface 16a of base end side undergauge; And the mould outer peripheral face 16b relative with the inner peripheral surface of steel pipe P.As shown in Figure 3, the circumference along tapered outer circumferential surfaces 15 configures multiple expanding die 16.
When using pipe expander 11 couples of steel pipe P with this spline structure to carry out expander, starting, expanding die 16 being aimed at expander starting position, semi-girder 12 is retreated from expander starting position.Thus, made each several part of the expanding die 16 slidingly contacted with tapered outer circumferential surfaces 15 conjugate to radiation direction by wedging action, steel pipe P is by expander.Then, the concavo-convex of cross sectional shape of steel pipe P diminishes, and the cross sectional shape of steel pipe P becomes close to positive toroidal.
Then, make semi-girder 12 proceed to expander starting position, make expanding die 16 return to the inner side of axle vertical direction by not shown relieving mechanism, then make semi-girder 12 be advanced further and measure accordingly with the pitch of expanding die 16 (axial length).Then, make expanding die 16 and new expander position alignment, repeat above-mentioned action.Thereby, it is possible to carry out the expander of the amount of the pitch of each expander expanding die 16 to steel pipe P in the length range of steel pipe P.
(embodiment)
Fig. 4, Fig. 5 be represent respectively make expander R than be 0.903 and 0.986, by the external diameter (solid line) of steel pipe after the steel pipe P expander after shaping by the molding procedure of buckling mode and the figure of internal diameter (dotted line).It should be noted that, the deviation amplification of the radius at each point place of steel pipe P relative to radius mean value represents with same multiplying power by Fig. 4,5.
As shown in Figure 4,5, in the molding procedure by buckling mode, in shaping steel pipe P, by expander R is become greater to 0.986 than from 0.903, the difference of external diameter and internal diameter diminishes, and roundness improves.In addition, even if increase the expander R ratio also Crack Damage to expanding die unconfirmed.
Fig. 6, Fig. 7 be represent expander R when drift R than with the figure of the relation of the roundness of steel pipe.Drift R is than referring to that the radius of curvature R P1 of outer peripheral face in punch tip portion is relative to the ratio of the radius of target R0 of the inner surface of steel pipe P.As shown in Figure 6, expander R when drift R than be all less than 1 and expander R when drift R than when meeting mathematical expression (1) shown below, can confirm and obtain the high steel pipe P of roundness.It should be noted that, the straight line L1 in Fig. 6 is by relational expression: the straight line that expander R ratio=-0.3 × drift R represents than+1.18.In addition, as shown in Figure 7, the scope of the value of expanding die R ratio can be made to be more than 0.94 further and to be less than in the scope of 1.
[mathematical expression 2]
Expander R ratio >=﹣ 0.3 × drift R is than+1.18 (1)
By known above, in the molding procedure by buckling mode to steel pipe forming, and with expander R when drift R than being all less than 1 and the expander R mode that when drift R ratio meets above-mentioned mathematical expression (1) carries out molding procedure and the expander operation of buckling mode, do not make expanding die crack roundness that damage just can improve steel pipe can be confirmed thus.
Above, be illustrated applying the working of an invention mode completed by the present inventor, but be not by based on present embodiment form a part of disclosure of the present invention record and accompanying drawing limit the present invention.That is, those skilled in the art etc. make based on present embodiment other embodiments, embodiment and application technology etc. are all contained in scope of the present invention.
Utilizability in industry
According to the present invention, can manufacture and not make expanding die crack the steel pipe damaging and just can improve the roundness of steel pipe.
The explanation of Reference numeral
1a, 1b punch die
2 drifts
11 pipe expanders
12 semi-girders
14 expander heads
15 tapered outer circumferential surfaces
16 expanding dies
16a tapered inner circumferential surface
16b mould outer peripheral face
P steel pipe
S steel plate
Claims (2)
1. a manufacture method for steel pipe, comprises following operation:
Forming process, adopt buckling mode to be drum by steel formability, described buckling mode is the drift utilizing top ends to have the outer peripheral face of circular arc cross-sections, depresses steel plate to make the width end of steel plate mode opposite each other;
Welding sequence, welds ground connection each other by the width end of steel plate;
Expander operation, use pipe expander to carry out expander from the inner side of steel pipe, described pipe expander is configured with multiple expanding dies of the outer peripheral face with circular arc cross-sections at circumferencial direction,
The radius of curvature of the outer peripheral face of expanding die is less than 1 relative to the ratio of the radius of target of the inner surface of steel pipe and drift R than all relative to the radius of curvature of the ratio of the radius of target of the inner surface of described steel pipe and the expander R when outer peripheral face in punch tip portion, expander R when drift R than meeting following mathematical expression (1)
[mathematical expression 1]
Expander R ratio >=﹣ 0.3 × drift R is than+1.18 (1).
2. the manufacture method of steel pipe according to claim 1, is characterized in that,
Described expander R is than being also in more than 0.94 and being less than in the scope of 1.0.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2013/064525 WO2014188599A1 (en) | 2013-05-24 | 2013-05-24 | Method for producing steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105246613A true CN105246613A (en) | 2016-01-13 |
| CN105246613B CN105246613B (en) | 2017-03-08 |
Family
ID=51409473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380076836.3A Active CN105246613B (en) | 2013-05-24 | 2013-05-24 | The manufacture method of steel pipe |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3006133B1 (en) |
| JP (1) | JP5541432B1 (en) |
| CN (1) | CN105246613B (en) |
| RU (1) | RU2617465C1 (en) |
| WO (1) | WO2014188599A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112638558A (en) * | 2018-09-14 | 2021-04-09 | 杰富意钢铁株式会社 | Method for manufacturing steel pipe and press die |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499324A (en) * | 2016-01-13 | 2016-04-20 | 中石化石油工程技术服务有限公司 | Steel tube opening roundness restoring device and using method thereof |
| WO2022009576A1 (en) | 2020-07-10 | 2022-01-13 | Ｊｆｅスチール株式会社 | Steel pipe roundness prediction method, steel pipe roundness control method, steel pipe production method, method for generating steel pipe roundness prediction model, and steel pipe roundness prediction device |
| WO2022009575A1 (en) | 2020-07-10 | 2022-01-13 | Ｊｆｅスチール株式会社 | Steel pipe roundness prediction model generation method, steel pipe roundness prediction method, steel pipe roundness control method, steel pipe manufacturing method, and steel pipe roundness prediction device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59209425A (en) * | 1983-05-12 | 1984-11-28 | Nippon Kokan Kk <Nkk> | U press tool for uoe steel tube manufacturing process |
| JP2001113316A (en) * | 1999-10-15 | 2001-04-24 | Kawasaki Steel Corp | Method and device for press forming tube |
| EP1382402A2 (en) * | 2002-07-15 | 2004-01-21 | SMS Meer GmbH | Device for the manufacture of tubes from metal plates |
| JP2008119710A (en) * | 2006-11-09 | 2008-05-29 | Nippon Steel Corp | Manufacturing method of high strength welded steel pipe |
| CN101972915A (en) * | 2010-08-04 | 2011-02-16 | 南京宝色股份公司 | Method for preparing corrosion-resistant non-ferrous metal pipeline |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS59183943A (en) | 1983-04-01 | 1984-10-19 | Sumitomo Metal Ind Ltd | Mechanical expansion method for steel pipes |
| JPS61147930A (en) | 1984-12-19 | 1986-07-05 | Sumitomo Metal Ind Ltd | Forming and expanding method of steel pipe |
| DE3632952A1 (en) * | 1986-09-27 | 1988-04-07 | Hoesch Ag | METHOD AND DEVICE FOR THE CONTINUOUS PRODUCTION OF TUBULAR BODIES BY LASER LENGTH SEAL WELDING |
| US4753101A (en) * | 1986-12-08 | 1988-06-28 | Shultz William E | Apparatus and method for expanding and shaping tubular conduits |
| JPH0394936A (en) | 1989-09-06 | 1991-04-19 | Nkk Corp | Method for expanding uoe steel pipe |
| RU2371265C2 (en) * | 2007-12-06 | 2009-10-27 | Открытое акционерное общество "Синарский трубный завод" (ОАО "СинТЗ") | Method for production of steel pipes from low-alloyed hardly deformed and carbon grades of steel |
| WO2009157570A1 (en) * | 2008-06-23 | 2009-12-30 | Ｊｆｅスチール株式会社 | Method for manufacturing laser-welded steel pipe |
| JP5262746B2 (en) | 2009-01-22 | 2013-08-14 | 新日鐵住金株式会社 | Pipe end shape correction method for UOE metal pipe |
| JP5614324B2 (en) * | 2011-02-21 | 2014-10-29 | Ｊｆｅスチール株式会社 | Steel pipe manufacturing method |
-
2013
- 2013-05-24 WO PCT/JP2013/064525 patent/WO2014188599A1/en active Application Filing
- 2013-05-24 EP EP13885377.5A patent/EP3006133B1/en active Active
- 2013-05-24 RU RU2015155583A patent/RU2617465C1/en active
- 2013-05-24 JP JP2014504870A patent/JP5541432B1/en active Active
- 2013-05-24 CN CN201380076836.3A patent/CN105246613B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59209425A (en) * | 1983-05-12 | 1984-11-28 | Nippon Kokan Kk <Nkk> | U press tool for uoe steel tube manufacturing process |
| JP2001113316A (en) * | 1999-10-15 | 2001-04-24 | Kawasaki Steel Corp | Method and device for press forming tube |
| EP1382402A2 (en) * | 2002-07-15 | 2004-01-21 | SMS Meer GmbH | Device for the manufacture of tubes from metal plates |
| JP2008119710A (en) * | 2006-11-09 | 2008-05-29 | Nippon Steel Corp | Manufacturing method of high strength welded steel pipe |
| CN101972915A (en) * | 2010-08-04 | 2011-02-16 | 南京宝色股份公司 | Method for preparing corrosion-resistant non-ferrous metal pipeline |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112638558A (en) * | 2018-09-14 | 2021-04-09 | 杰富意钢铁株式会社 | Method for manufacturing steel pipe and press die |
| CN112638558B (en) * | 2018-09-14 | 2022-12-16 | 杰富意钢铁株式会社 | Method for manufacturing steel pipe and press die |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014188599A1 (en) | 2014-11-27 |
| JP5541432B1 (en) | 2014-07-09 |
| CN105246613B (en) | 2017-03-08 |
| EP3006133A1 (en) | 2016-04-13 |
| RU2617465C1 (en) | 2017-04-25 |
| EP3006133B1 (en) | 2017-08-16 |
| EP3006133A4 (en) | 2016-06-29 |
| JPWO2014188599A1 (en) | 2017-02-23 |
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