WO1991001824A1 - Dispositif elongateur-egalisateur de corps creux ronds destines a la fabrication de tubes sans soudure - Google Patents
Dispositif elongateur-egalisateur de corps creux ronds destines a la fabrication de tubes sans soudure Download PDFInfo
- Publication number
- WO1991001824A1 WO1991001824A1 PCT/CH1990/000183 CH9000183W WO9101824A1 WO 1991001824 A1 WO1991001824 A1 WO 1991001824A1 CH 9000183 W CH9000183 W CH 9000183W WO 9101824 A1 WO9101824 A1 WO 9101824A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinders
- mandrel
- cage
- hollow body
- cages
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 241000220324 Pyrus Species 0.000 claims description 3
- -1 ferrous metals Chemical class 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 235000021017 pears Nutrition 0.000 claims description 3
- 239000012809 cooling fluid Substances 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims description 2
- FPIPGXGPPPQFEQ-OVSJKPMPSA-N all-trans-retinol Chemical compound OC\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C FPIPGXGPPPQFEQ-OVSJKPMPSA-N 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 206010010219 Compulsions Diseases 0.000 description 1
- 239000011717 all-trans-retinol Substances 0.000 description 1
- 235000019169 all-trans-retinol Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
- B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
- B21B25/02—Guides, supports, or abutments for mandrels, e.g. carriages or steadiers; Adjusting devices for mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/08—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
- B21B17/10—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
- B21B2035/005—Hydraulic drive motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
- B21B25/04—Cooling or lubricating mandrels during operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/06—Pushing or forcing work into pass
Definitions
- the present invention relates to an elongator-equalizer device for round hollow bodies of steel or non-ferrous metals intended for the manufacture of seamless tubes.
- the hollow bodies from pressor-piercing drills such as the hydraulic press, the oblique piercer or the P.P.M. (Press Percing Mill) most often have eccentricities and other irregularities. This can happen, for example, due to an error in the oven's conduct to heat the billets, mainly during night shifts, or when the hot billets must stop on the conveyor rollers. It follows that the billets, especially when they are square, have unequal temperatures at the time of drilling, so that the drilling punch follows the hottest area of the billet and leaves the geometric axis of the hollow body that we wish to obtain. This phenomenon of the path of least resistance causes the hollow body to become eccentric and out of the wall tolerances that the final product must have during rolling with the finisher to obtain tubes of thin thickness.
- the hollow body obtained with a near-rolling mill piercing from a square billet has an internal diameter / external diameter ratio of the order of 0.50 to 0.55.
- These very thick hollow bodies cannot therefore feed the finisher, which can only accept elongated hollow billets whose ratio between the internal diameter and the external diameter is less than 0.7, and therefore the hollow bodies must be lengthened in an elongator-equalizer wall rolling mill to form a hollow block usable at the finisher.
- the wall extension-equalizer has been constituted by an oblique of two cylinders with crossed axes rotating in the same direction, of the type of the Mannes ann piercer. - 2 -
- the object of the present invention is to allow the transformation of a hollow body, obtainable with a piercing press-rolling mill from a steel billet of very common quality, into a hollow tube of uniform thickness and suitable to be rolled in finishers such as for example " Te MPM (Multistand Pipe Mill) which is the most used today.
- the invention relates to an elongator-equalizer device for round hollow bodies of steel or non-ferrous metals intended for the manufacture of seamless tubes, this device comprising a rolling mill intended for the longitudinal rolling of the hollow body and comprising at least three cages * of cylinders of substantially round caliber and a conical mandrel retained by a mandrel holder and maintained in the axis of the cages by a centering guide device, so as to constitute a concentric free space between the mandrel and the cylinders in which the hollow body must advance, pushed by a pusher.
- the device comprises four cylinder cages, the first cage comprising two cylinders with round grooves, the other three cages comprising four controlled cylinders, the axes of the cylinders of the third cage being able to be offset by 22.5 * relative to to the axes of the cylinders of the second cage, and the axes of the cylinders of the fourth cage being able to be phase-shifted by 45 * with respect to those of the third cage.
- the device may include a mechanism for opening the centering guide device, controlled by the passage of the end of the hollow body.
- the mandrel may include a pipe device intended for the circulation of a cooling fluid and a tube intended to bring a lubricating and deoxidizing mixture to the tip of the mandrel.
- the mandrel can be made in one piece or include a set of tubular support pieces and rolling pears.
- the invention also relates to a method of implementing the device, characterized in that the hollow body is oriented so that the generatrix of its thickest part is turned upwards or downwards, so that it is located at the bottom of the throat of the upper cylinder or at the bottom of the throat of the ... lower cylinder.
- Fig. 1 is a longitudinal section of a schematic example of a device according to the invention
- Fig. 2 is a vertical section of the first cylinder cage, along the line I-I of FIG. 1,
- Fig. 3 shows vertical sections of the third (fig. 3a) and fourth (fig. 3b) cylinder cages so as to illustrate their angular phase shift
- Fig. 4 is a vertical section of a four-cylinder cage according to a first variant
- Fig. 5 is a vertical section of a four-cylinder cage according to a second variant
- fig. 6 is a longitudinal section of a second schematic example of a device according to the invention.
- Fig. 7- is a vertical section of a four-cylinder cage of the example of FIG. 6, and
- Fig. 8 is a longitudinal section of an example of a mandrel.
- the device represented in FIG. 1 comprises four cylinder cages 1 to 4, the first cage being provided with two cylinders with round gauge, the other three cages each being provided with four cylinders.
- a rolling mandrel 5 is held in the axis of the gauge formed by the cylinders of the cages by a centering guide device 9, 9 '; 10, 10 'robust and deflectable, so as to constitute a concentric free space in which the hollow body 12 can advance in the first cage, pushed by a pusher 6 of high power and driven by the two cylinders 7 and 8, with round groove , of the first cage.
- the device further comprises a mechanism for opening the centering guide device controlled by the passage of the very end of the hollow body.
- the cylinders of the four cages are controlled either by electric motors, or preferably by olio-hydraulic motors. It is also possible to drive all the cylinders of a cage by a single motor using a single gear system acting on the shafts of the cylinders.
- the axes of the cylinders of the third cage are phase-shifted by 22.5 ° relative to those of the second cage, while the axes of the cylinders of the fourth cage are 45 ° out of phase with those of the third cage ( Figures 3a and 3b).
- each of the four-cylinder cages can have two driven cylinders, the other two being idle cylinders. In this case, as shown in Figure 4, the contact angle of the idler cylinders will be less than the contact angle of the driven cylinders ( Figure 4).
- the contact angle of the idler cylinders can be chosen between 45 ° and 60 ° for the second cage, while for the third cage, this angle will be chosen between 60 ° and 90 ° so as to constitute an overlap, the contact angles of the idle cylinders of the fourth cage being chosen the same as those of the second cage.
- the mandrel 5 preferably of slightly conical shape, and on which the hollow body is laminated by the action of the four groups of cylinders of the four cages, is screwed at its rear end into a mandrel holder 11. It is pushed to the he interior of the hollow body and its tip is gradually put in place by controlled floating.
- the mandrel centering guide device comprises robust centering devices arranged on the one hand 9, 9 'between the first and second cages and on the other hand 10, 10' between the second and third cages, so that the mandrel is placed at equal distance from the bottoms of the grooves of the working rolls.
- centering devices open by a control movement controlled by the arrival of the end of the hollow body, the upper 9 and lower guides 9 * moving apart to allow the hollow body to pass, the lower guide 9 * coming position at the level of the bottom of the groove of the lower cylinder of the first cage so as to constitute a guide for the hollow body at the outlet of the cage.
- the centering device 10, 10 'operates in the same way.
- the rolling mill is further provided with an input table and an output table. The rapid positioning stroke of the chuck ends at the last stand just before the hollow body arrives.
- the hollow body coming from the piercing press-rolling mill is oriented during its transfer so that the generatrix of its thickest part is turned upwards.
- This hollow body is then pushed, with a force slightly less than that necessary for the deformation of the hot steel, by a hydraulic pusher, or other pusher, into the first cage.
- the thrust is maintained until the rear end of the hollow body enters the first cage.
- the duration of the approach which must be greater than the time of opening of the centering devices, can be increased by decreasing the speed of the hollow body, or even by an instantaneous stop of the rolling mill, that the man of the trade means by "stop and drop".
- the same method is "repeated during rolling in the second stand, the second centering device 10, 10 * is arranged just after said second cage.
- the device described above makes it possible to create a circular space between the round caliber formed by the two cylinders of the first cage and the mandrel, through which the plastic mass of the hollow body must pass by the combined force of the push rod for introducing the hollow body and by the driving forces of the two rolling rollers 7 and 8, in order to form a hollow body of uniform thickness, even though the hollow body obtained with the piercing press-mill is eccentric.
- the primary function of the elongator-equalizer is to create deformation conditions such that the hollow body cannot follow its natural path with the least effort, that is to say the thermal axis, but that it follows the prescribed geometric track.
- Plastic material submits to the law of the machine, by pressure and compulsion ( 10, Drang und Zwang).
- the conical rolling mandrel (figure 8), screwed to the head of the mandrel holder, has a hollow interior provided with a "return" return device 13, 13 'for the circulation of a fluid at very low temperature. , preferably in a closed refrigeration circuit regulated by thermostats.
- the interior of the mandrel further comprises a tube intended for the passage of a pasty, liquid or fluid granulated material and terminating at the end of the mandrel so as to cover the interior surface of the hollow body during the introduction of the mandrel. and serving as decalamin nt of the interior surface of the hollow body and as lubricant of the mandrel.
- the four cylinder cages can be replaced by only three cages, the device with four cages being necessary for obtaining seamless tubes of thin thickness. It is also possible to replace the four cylinders of a cage by an arrangement of three or more cylinders, ordered individually.
- the mandrel of one-piece conical rolling 15 can be replaced by a mandrel composed of tubular support pieces 16 and rolling pears 17 as shown in FIG. 6.
- the '1'invention device very advantageously replaces Acon oblique piercer Hannesmann (Schraglochwalzwerk) and its derivative, the elongator ⁇ ssel-equalizer, which require the charging of a high quality material and therefore high cost .
- the device of the invention for the manufacture of seamless tubes should make it possible to conquer a large part of the welded tube market, even in the field of standard and commercial tubes, since it allows the use of continuous casting billets, polygonal shape, of commercial steel and no longer of high quality steel, necessary for the only reason of being able to be drilled with an oblique Mannesmann piercer or to be lengthened and equalized as a hollow body at an oblique Mannesmann or Assel.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2870/89-0 | 1989-08-03 | ||
CH287089 | 1989-08-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991001824A1 true WO1991001824A1 (fr) | 1991-02-21 |
Family
ID=4243429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH1990/000183 WO1991001824A1 (fr) | 1989-08-03 | 1990-07-30 | Dispositif elongateur-egalisateur de corps creux ronds destines a la fabrication de tubes sans soudure |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN1049618A (fr) |
AU (1) | AU6077190A (fr) |
WO (1) | WO1991001824A1 (fr) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5834024A (en) * | 1995-01-05 | 1998-11-10 | Fh Faulding & Co. Limited | Controlled absorption diltiazem pharmaceutical formulation |
EP0865836A3 (fr) * | 1997-03-20 | 1999-04-14 | Techint Compagnia Tecnica Internazionale S.P.A. | Train de laminage et procédé de laminage correspondant à rendement amélioré |
DE19532643C5 (de) * | 1994-09-05 | 2006-05-11 | Sumitomo Metal Industries, Ltd. | Rohrwalzverfahren zum Strecken und Walzen von Rohrluppen und Dornwalzanlage |
EP1683587A1 (fr) * | 2005-01-21 | 2006-07-26 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Procédé et laminoir pour le laminage des tubes avec mandrin |
EP1764167A1 (fr) * | 2005-09-20 | 2007-03-21 | SMS Meer GmbH | Procédé et laminoir pour la fabrication d'un tube sans soudure |
WO2007114532A1 (fr) * | 2006-04-03 | 2007-10-11 | Industry-Academic Cooperation Foundation Gyeongsang National University | Nouveaux dérivés de chalcone, sel pharmaceutiquement acceptable de ces dérivés de chalcone et procédé de préparation et d'utilisation de ces derniers |
WO2011083101A3 (fr) * | 2010-01-07 | 2011-09-22 | New Seamless Tube Technology Corp. | Laminage à chaud de tubes métalliques sans soudure sur un laminoir continu à mandrin fixe |
RU2433876C1 (ru) * | 2010-06-22 | 2011-11-20 | Открытое акционерное общество "Электростальский завод тяжелого машиностроения" | Способ изготовления бесшовной трубы и непрерывный оправочный стан для его осуществления |
WO2011154133A1 (fr) * | 2010-06-08 | 2011-12-15 | Coating Management Switzerland Gmbh | Procédé de production de tuyaux sans soudure |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007144905A1 (fr) * | 2006-06-12 | 2007-12-21 | Sms Demag Innse S.P.A. | Laminoir à mandrin retenu pour tubes sans soudures |
US10369609B2 (en) | 2014-08-29 | 2019-08-06 | Victaulic Company | Roller with compound angle flange |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE150376C (fr) * | ||||
US1352493A (en) * | 1919-01-23 | 1920-09-14 | Wolffgram Ludwig | Rolling-mill |
GB288359A (en) * | 1926-12-30 | 1928-03-30 | Wellman Seaver Rolling Mill Co | Improvements in and process for reducing the external diameter of metal tubes and maintaining, or reducing, their gauge |
US2025439A (en) * | 1933-05-20 | 1935-12-24 | Brownstein Benjamin | Mandrel bar for continuous tube rolling mills |
FR1153322A (fr) * | 1955-05-17 | 1958-03-05 | Delta Kuehlschrank G M B H | Procédé et dispositif pour la fabrication de tubes d'acier |
FR1224862A (fr) * | 1958-01-15 | 1960-06-28 | Perfectionnements aux mandrins bloqués utilisés pour la fabrication de tubes sans soudure au train continu à cages duo successives | |
FR1467560A (fr) * | 1965-02-15 | 1967-01-27 | Blaw Knox Co | Procédé de fabrication de tubes sans soudure |
US3394568A (en) * | 1964-09-09 | 1968-07-30 | Contubind Sa | Apparatus for rolling seamless tubes |
JPS5461063A (en) * | 1977-10-26 | 1979-05-17 | Nippon Steel Corp | Method and apparatus for continuous rolling of pipe |
US4228939A (en) * | 1977-09-19 | 1980-10-21 | Innocenti Santeustacchio S.P.A. | Combined support and guide for the mandrel of a restrained mandrel continuous rolling mill |
-
1990
- 1990-07-30 AU AU60771/90A patent/AU6077190A/en not_active Abandoned
- 1990-07-30 WO PCT/CH1990/000183 patent/WO1991001824A1/fr not_active Application Discontinuation
- 1990-08-02 CN CN 90106898 patent/CN1049618A/zh active Pending
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE150376C (fr) * | ||||
US1352493A (en) * | 1919-01-23 | 1920-09-14 | Wolffgram Ludwig | Rolling-mill |
GB288359A (en) * | 1926-12-30 | 1928-03-30 | Wellman Seaver Rolling Mill Co | Improvements in and process for reducing the external diameter of metal tubes and maintaining, or reducing, their gauge |
US2025439A (en) * | 1933-05-20 | 1935-12-24 | Brownstein Benjamin | Mandrel bar for continuous tube rolling mills |
FR1153322A (fr) * | 1955-05-17 | 1958-03-05 | Delta Kuehlschrank G M B H | Procédé et dispositif pour la fabrication de tubes d'acier |
FR1224862A (fr) * | 1958-01-15 | 1960-06-28 | Perfectionnements aux mandrins bloqués utilisés pour la fabrication de tubes sans soudure au train continu à cages duo successives | |
US3394568A (en) * | 1964-09-09 | 1968-07-30 | Contubind Sa | Apparatus for rolling seamless tubes |
FR1467560A (fr) * | 1965-02-15 | 1967-01-27 | Blaw Knox Co | Procédé de fabrication de tubes sans soudure |
US4228939A (en) * | 1977-09-19 | 1980-10-21 | Innocenti Santeustacchio S.P.A. | Combined support and guide for the mandrel of a restrained mandrel continuous rolling mill |
JPS5461063A (en) * | 1977-10-26 | 1979-05-17 | Nippon Steel Corp | Method and apparatus for continuous rolling of pipe |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19532643C5 (de) * | 1994-09-05 | 2006-05-11 | Sumitomo Metal Industries, Ltd. | Rohrwalzverfahren zum Strecken und Walzen von Rohrluppen und Dornwalzanlage |
US5834024A (en) * | 1995-01-05 | 1998-11-10 | Fh Faulding & Co. Limited | Controlled absorption diltiazem pharmaceutical formulation |
US6033687A (en) * | 1995-01-05 | 2000-03-07 | F.H. Faulding & Co. | Controlled absorption diltiazem pharmaceutical formulation |
EP0865836A3 (fr) * | 1997-03-20 | 1999-04-14 | Techint Compagnia Tecnica Internazionale S.P.A. | Train de laminage et procédé de laminage correspondant à rendement amélioré |
US6128939A (en) * | 1997-03-20 | 2000-10-10 | Techint Compagnia Tecnica Internazionale S.P.A. | Roll train and the relative rolling process with an improved yield |
EP1683587A1 (fr) * | 2005-01-21 | 2006-07-26 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Procédé et laminoir pour le laminage des tubes avec mandrin |
EP1764167A1 (fr) * | 2005-09-20 | 2007-03-21 | SMS Meer GmbH | Procédé et laminoir pour la fabrication d'un tube sans soudure |
US7851654B2 (en) | 2006-04-03 | 2010-12-14 | Industry-Academic Cooperation Foundation Gyeongsang National University | Chalcone derivatives, pharmaceutically acceptable salt, method for preparation and uses thereof |
WO2007114532A1 (fr) * | 2006-04-03 | 2007-10-11 | Industry-Academic Cooperation Foundation Gyeongsang National University | Nouveaux dérivés de chalcone, sel pharmaceutiquement acceptable de ces dérivés de chalcone et procédé de préparation et d'utilisation de ces derniers |
WO2011083101A3 (fr) * | 2010-01-07 | 2011-09-22 | New Seamless Tube Technology Corp. | Laminage à chaud de tubes métalliques sans soudure sur un laminoir continu à mandrin fixe |
WO2011154133A1 (fr) * | 2010-06-08 | 2011-12-15 | Coating Management Switzerland Gmbh | Procédé de production de tuyaux sans soudure |
CN103025445A (zh) * | 2010-06-08 | 2013-04-03 | 涂层处理瑞士有限责任公司 | 生产无缝管的方法 |
JP2013533116A (ja) * | 2010-06-08 | 2013-08-22 | コーティング マネジメント スウィッツァーランド ゲゼルシャフト ミット ベシュレンクテル ハフツング | シームレスパイプの製造方法 |
RU2536845C2 (ru) * | 2010-06-08 | 2014-12-27 | Коутинг Менеджмент Свитзерленд Гмбх | Способ производства бесшовных труб |
US9731336B2 (en) | 2010-06-08 | 2017-08-15 | Coating Management Switzerland Gmbh | Method for producing seamless pipes |
RU2433876C1 (ru) * | 2010-06-22 | 2011-11-20 | Открытое акционерное общество "Электростальский завод тяжелого машиностроения" | Способ изготовления бесшовной трубы и непрерывный оправочный стан для его осуществления |
Also Published As
Publication number | Publication date |
---|---|
AU6077190A (en) | 1991-03-11 |
CN1049618A (zh) | 1991-03-06 |
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