EP1169150B1 - Verfahren zum herstellen eines rohres mit einem nicht kreisförmigen querschnitt sowie vorrichtung zur durchführung des verfahrens - Google Patents

Verfahren zum herstellen eines rohres mit einem nicht kreisförmigen querschnitt sowie vorrichtung zur durchführung des verfahrens Download PDF

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Publication number
EP1169150B1
EP1169150B1 EP00917404A EP00917404A EP1169150B1 EP 1169150 B1 EP1169150 B1 EP 1169150B1 EP 00917404 A EP00917404 A EP 00917404A EP 00917404 A EP00917404 A EP 00917404A EP 1169150 B1 EP1169150 B1 EP 1169150B1
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EP
European Patent Office
Prior art keywords
pipe
roll
forming
rolls
angular
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.)
Expired - Lifetime
Application number
EP00917404A
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English (en)
French (fr)
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EP1169150A1 (de
Inventor
Manabu Kiuchi
Feizhou Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nakata Manufacturing Co Ltd
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Nakata Manufacturing Co Ltd
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Filing date
Publication date
Application filed by Nakata Manufacturing Co Ltd filed Critical Nakata Manufacturing Co Ltd
Publication of EP1169150A1 publication Critical patent/EP1169150A1/de
Application granted granted Critical
Publication of EP1169150B1 publication Critical patent/EP1169150B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/155—Making tubes with non circular section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
    • B21B13/12—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process axes being arranged in different planes
    • 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
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
    • 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
    • B21D15/00—Corrugating tubes
    • B21D15/02—Corrugating tubes longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis

Definitions

  • the present invention relates to a method and device for forming a cylindrical pipe into an angular pipe, according to the preambles of claims 1 and 4, and more particularly it relates to a method for manufacturing an angular pipe, and device therefor, which can, in accordance with the dimensional variations of the angular pipe demanded, manufacture a large variety of angular pipes in small volumes efficiently.
  • the rolls employed for the forming are configured from a plurality of vertical roll pairs and a plurality of horizontal roll pairs arranged alternately in the direction of travel of the cylindrical pipe.
  • the configuration which is adopted involves the division of the forming rolls into several groups and the incorporation thereof on a common support frame for each divided group, and the employment of a support position control mechanism which, using the support frame unit, varies the position of the rolls on the pipe.
  • a support position control mechanism may be employed to alter the roll position incorporated by the support frame and the roll gap in the vertical and horizontal direction, and the desired cylindrical pipe is sent forward to pass through the altered roll gap and is pushed or drawn wherein the desired deformation to the cylindrical pipe is applied to create the desired angular pipe.
  • This process of forming the cylindrical pipe is one which involves the employment of a so-called 4-roll type forming roll configured from a driven, or non-driven, 4-piece roll group comprising an above/below pair of horizontal rolls 10a, 10b and a left/right pair of vertical rolls 20a, 20b arranged in such a way that the axial centres thereof lie along the same plane.
  • the method adopted involves the employment of a plurality of stands of forming stands in which the abovementioned 4-piece group forming rolls are enclosed - normally 3 to 6 stands are employed - wherein the left/right and above/below centre of the roll gap of the abovementioned vertical roll pair and abovementioned horizontal roll pair enclosed by the abovementioned stands are aligned and arranged to be on a horizontal single line, and while the cylindrical pipe, which constitutes the raw material pipe, is sent to the downstream side passing through the gap formed by the arranged abovementioned 4-piece group rolls of the abovementioned forming stands, the desired deformation is applied to the cylindrical pipe an angular pipes successively formed.
  • FIG. 2 shows one example of the application thereof.
  • a cylindrical pipe 60 which constitutes the raw material pipe, is held at the end parts thereof in a ram 40 of an oil pressure cylinder 30 by way of a tightening means such as a chuck, and by the pressure force of the abovementioned oil pressure cylinder 30, the pipe is sent into (in the direction of the arrow in Figure 2), for the purpose of forming, the roll gap of the abovementioned forming roll where it is subjected to forming processing.
  • the abovementioned forming stand row which is employed is configured from: enclosed rolls 50a and No. 1 forming roll stand for initiating the forming of the cylindrical pipe into a angular pipe; enclosed rolls 50b and No. 2 forming roll stand to advance the different form; and enclosed rolls 50c and No. 3 forming roll stand for finish-forming to an angular pipe 70 whose final cross-section is square or rectangular.
  • the enclosed forming rolls in the case of, by way of example, the No. 1 moulder rolling stand are configured from 4-piece group rolls comprising an above horizontal roll 10c, below horizontal roll 10d, and a pair of left/right vertical rolls 20c, 20d.
  • the configuration of the forming rolls in the No. 2 and No. 3 forming roll stands is the same.
  • a forming device which comprises a mechanism for driving the above/below horizontal rolls or left/right vertical rolls is widely employed.
  • the problem described in 1) above is a particularly serious problem pertaining to the manufacture of angular pipes.
  • the need to manufacture a small volume of each of a diversified type of angular pipes of different dimensions has increased, and high productivity manufacturing technology which is able to deal with the production of many sizes in small lots has been demanded.
  • US 5423201 discloses an apparatus and a method for continuous shaping a metal tube in which the tube is passed between opposing pairs of rollers, one pair shaping the tube from above and below and the other pair shaping it from opposing sides, but with the axes of rotation of the rollers lying in the same plane.
  • the objective of the invention is to provide a method for manufacturing an angular pipe, and the device therefore, wherein: a variety of sizes of angular pipe are able to be formed from a cylindrical pipe without changing the rolls; shape defect such as warp is not generated at the side portion and the deformation strain is minimal; and manufacture can be achieved with high productivity.
  • a method of manufacturing an angular pipe from a cylindrical pipe comprising the steps of : (1) arranging, in the direction of travel of the pipe, pairs of upper and lower horizontal forming rolls and pairs of left and right vertical forming rolls; (2) selecting the gap between opposing rolls of each forming roll pair; and (3) roll forming the angular pipe with the desired cross-section from the cylindrical pipe, the method characterised in that the pairs of horizontal forming rolls and the pairs of vertical forming rolls are arranged alternately in multiple stages.
  • an angular pipe manufacturing device for manufacturing an angular pipe from a cylindrical pipe, wherein the device comprises : (1) forming rolls consisting of pairs of upper and lower horizontal rolls and pairs of left and right vertical rolls; and (2) a means for changing the gap between opposing rolls of each forming roll pair, the device characterised in that the horizontal and vertical rolls are arranged alternately in multiple stages.
  • the cylindrical pipe can be moved forward and pushed or drawn through the predetermined roll gaps and an angular pipe, with a square cross-section or rectangular cross-section, can be continuously manufactured from a cylindrical pipe.
  • each group is able to be supported by a supporting frame and position control of the roll in each group is able to be performed. Size changes can be executed easily and swiftly, and manufacture with good shape precision and good productivity can be achieved.
  • the inventors discovered that, in a configuration in which it is possible to rotate all the vertical roll pairs and horizontal roll pairs along the axis of the cylindrical pipe, forming can be achieved in such a way that, the welding seam can be positioned at any portion of the cross-section of the angular pipe.
  • the roll forming device employed in the method for manufacturing the angular pipe based on a preferred embodiment of the present invention, and more particularly, the configuration of the enclosed forming roll groups, is shown in the Figure 3 type diagram.
  • an above/below pair of horizontal rolls a, b and left/right pair of vertical rolls c, d are arranged alternately and at multiple stages 1 ⁇ n, m.
  • the order of arrangement may be such that the vertical rolls are the first rolls.
  • the axial centre of the vertical rolls and the axial centre of the horizontal rolls belonging to the adjacent vertical rolls pairs c, d and horizontal roll pairs a, b are, unlike the 4-roll type forming roll of the prior art shown in Figure 1, not on the same planar surface, and are arranged in such a way that a distance between the surface which includes the axial centre of the abovementioned horizontal roll pairs, and the surface which includes the axial centre of the abovementioned vertical roll pairs, is maintained to the degree that they do not interfere with each other.
  • group division can be performed at the appropriate number of stages as determined from the demands of control or formability such as, by way of example, group division in a constant number such as at 3-stages 4-stages or 5-stages, or group division at a range of different numbers of stages.
  • the abovementioned vertical roll groups and abovementioned horizontal roll groups are supported by joint supporting frames respectively.
  • the supporting frame comprises a roll supporting mechanism equipped with a set-position altering control means which affords the adjustment and change, in accordance with the product dimensions and cylindrical pipe dimensions of the raw material pipe, of the roll gap formed by the abovementioned vertical roll pairs and the abovementioned horizontal roll pairs.
  • the support frame itself may be moved by means of the set-position altering control means wherein, by way of example, a configuration may be adopted in which the gap between the aforementioned right vertical roll and aforementioned left vertical roll can be altered, as appropriate, by the employment of a set-position altering control mechanism, in which the abovementioned support frame is mounted in advance, to afford the movement in the left/right direction in respectively identical phases.
  • any well known mechanical mechanism and control means can be adopted.
  • the roll profile is established in such a way that, its curvature is reduced step-wise.
  • a roll is employed which has a profile of a very small curvature, that is to say, a roll which is almost equivalent to a flat roll.
  • the desired cylindrical pipe by way of the roll gap of the abovementioned vertical roll pairs and the abovementioned horizontal roll pairs arranged alternately in a row form, is moved forward and formed, by pushing or drawing while the desired deformation is applied, into the desired angular pipe which has either a square-shape or rectangular-shape cross-section.
  • a roll drive device can be introduced to drive all or a selected portion of the rolls as appropriate, so that the automatic forwarding of the pipe during forming is possible, and the function of the device of the present invention can be improved even further.
  • the number of vertical roll groups which form the abovementioned left/right pairs and the number of horizontal roll groups which form the abovementioned above/below pairs can be selected, as appropriate, based on factors such as the diameter of the cylindrical pipe being formed, the wall thickness, material quality, and shape and dimension of the angular pipe which is required.
  • the diameter of the horizontal rolls and vertical rolls for the abovementioned forming is determined, as appropriate, by, for example, the dimensions and form of the angular pipe and the raw material pipe which constitutes the subject material.
  • the dimensions and form of the angular pipe and the raw material pipe which constitutes the subject material are determined, as appropriate, by, for example, the dimensions and form of the angular pipe and the raw material pipe which constitutes the subject material.
  • the diameter of the horizontal rolls and vertical rolls for the abovementioned forming is determined, as appropriate, by, for example, the dimensions and form of the angular pipe and the raw material pipe which constitutes the subject material.
  • the entire length of the forming device in this case would be in the region of 2.5 m to 3.0 m, which is much shorter by comparison to the forming device of the prior art, and a marked shortening of the length of the device is possible.
  • the method of forming based on the invention involves the forming using forming roll groups formed in a comparatively large number of pairs, it has a very small forming amount (forming strain) per roll compared to the 4-roll type forming method of the prior art. For that reason, the generation of cracks and other product defects can be prevented effectively
  • FIG 4a there are 15 vertical roll groups which form the abovementioned left/right pairs and 15 horizontal roll groups which form the abovementioned above/below pairs in a roll forming device for manufacturing a angular pipe based on the invention, making a total of 30 roll groups.
  • Figure 4b in the same forming device as the case of embodiment 1, shows a case in which a mounted roll setting-position altering control mechanism is employed and the gaps of the horizontal rolls and vertical rolls are altered, wherein an angular pipe, which has an oblong cross-section, is manufactured from a cylindrical pipe which has an outer diameter the same as that used in embodiment 1.
  • Figure 4c shows a case in which, in a forming device the same as that of embodiment 1, a mounted roll setting-position altering control mechanism is employed and the gaps of the horizontal rolls and vertical rolls are altered, wherein an angular pipe is manufactured, which has a desired square cross-section of comparatively small dimension, from a cylindrical pipe.
  • the forming device and roll forming method based on the invention in a method for forming an cylindrical pipe into a angular pipe, affords the realization of the complete common-use of forming rolls which had been impossible in the prior art, and it affords the efficient manufacture of angular pipes of different dimensions without changing of the roll groups.
  • this invention is one in which, by a marked improvement in the productivity of the forming work and the gentle deformation applied to the raw material pipe, an angular pipe product of a high product quality standard, and with very high dimensional precision, can be manufactured easily and at low cost.
  • the invention has, by comparison to the device and method for forming an angular pipe from a cylindrical pipe of the prior art, the following advantages:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (6)

  1. Verfahren zum Herstellen eines eckigen Rohrs aus einem zylindrischen Rohr, mit folgenden Schritten:
    (1) Anordnen von Paaren oberer und unterer horizontaler Formierwalzen und von Paaren linker und rechter vertikaler Formierwalzen in Bewegungsrichtung des Rohrs;
    (2) Auswählen des Abstands zwischen einander gegenüberliegenden Walzen jedes Formierwalzenpaars; und
    (3) Walzformen des eckigen Rohrs mit dem gewünschten Durchmesser aus dem zylindrischen Rohr,
    dadurch gekennzeichnet, dass
    die Paare horizontaler Formierwalzen und die Paare vertikaler Formierwalzen abwechselnd in mehreren Stufen angeordnet sind.
  2. Verfahren zum Herstellen eines eckigen Rohrs gemäß Anspruch 1, wobei Formierwalzen, die aus abwechselnd in mehreren Stufen angeordneten vertikalen Rollenpaaren und horizontalen Rollenpaaren bestehen, in eine Vielzahl von Gruppen aufgeteilt werden, wobei jede Gruppe von Formierwalzen jeweils in einem Stützrahmen gehalten wird und wobei für den die jeweilige Gruppe von Formierwalzen haltenden Stützrahmen eine Positionssteuerung durchgeführt wird.
  3. Verfahren zum Herstellen eines eckigen Rohrs gemäß Anspruch 2, wobei die Formierwalzen in dem Stützrahmen unabhängig so gehalten werden, dass die Position der Walze geändert werden kann.
  4. Vorrichtung zum Herstellen eines eckigen Rohrs aus einem zylindrischen Rohr mit:
    (1) Formierwalzen, die aus Paaren oberer und unterer horizontaler Walzen und aus Paaren linker und rechter vertikaler Walzen bestehen; und
    (2) einer Einrichtung zum Ändern des Abstands zwischen einander gegenüberliegenden Walzen jedes Formierwalzenpaars,
    dadurch gekennzeichnet, dass
    die horizontalen und vertikalen Walzen abwechselnd in mehreren Stufen angeordnet sind.
  5. Vorrichtung zum Herstellen eines eckigen Rohrs gemäß Anspruch 4, mit einer Einrichtung zum Aufteilen der Formierwalzen, die aus abwechselnd in mehreren Stufen angeordneten vertikalen Rollenpaaren und horizontalen Rollenpaaren bestehen, in eine Vielzahl von Gruppen und zum Halten jeder Gruppe von Formierwalzen jeweils in einem Stützrahmen, sowie einer Einrichtung zum Durchführen einer Positionssteuerung für den die jeweilige Gruppe von Formierwalzen haltenden Stützrahmen.
  6. Vorrichtung zum Herstellen eines eckigen Rohrs gemäß Anspruch 5, mit einer Einrichtung zum Halten der Formierwalzen in jedem Stützrahmen unabhängig so, dass die Position jeder Walze gesteuert werden kann.
EP00917404A 1999-04-21 2000-04-21 Verfahren zum herstellen eines rohres mit einem nicht kreisförmigen querschnitt sowie vorrichtung zur durchführung des verfahrens Expired - Lifetime EP1169150B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP15037999 1999-04-21
JP11150379A JP2000301233A (ja) 1999-04-21 1999-04-21 角管製造用直交ロール列成形装置
PCT/JP2000/002612 WO2000064606A1 (en) 1999-04-21 2000-04-21 Method for manufacturing a pipe with a not circular cross-section and device therefor

Publications (2)

Publication Number Publication Date
EP1169150A1 EP1169150A1 (de) 2002-01-09
EP1169150B1 true EP1169150B1 (de) 2005-06-01

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Application Number Title Priority Date Filing Date
EP00917404A Expired - Lifetime EP1169150B1 (de) 1999-04-21 2000-04-21 Verfahren zum herstellen eines rohres mit einem nicht kreisförmigen querschnitt sowie vorrichtung zur durchführung des verfahrens

Country Status (5)

Country Link
EP (1) EP1169150B1 (de)
JP (1) JP2000301233A (de)
AT (1) ATE296691T1 (de)
DE (1) DE60020545T2 (de)
WO (1) WO2000064606A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109127736A (zh) * 2018-09-11 2019-01-04 镇江北新建材有限公司 一种墙体龙骨生产用轧辊高度快速变更方法和装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4780952B2 (ja) * 2004-11-26 2011-09-28 株式会社中田製作所 角管成形用ロールと角管のロール成形方法及び成形装置
DE102006040023A1 (de) * 2006-08-25 2008-03-20 Universität Kassel Verfahren zur Herstellung von mindestens zwei parallel zueinander verlaufenden ebenen Funktionsflächen auf einem Rohr
JP5276168B2 (ja) * 2008-08-01 2013-08-28 ヴァヴィット エッセ エッレ エッレ 一定の長さに管の外形を加工する方法
KR101492089B1 (ko) 2014-03-20 2015-02-11 (주) 한양테크 다단 곡률을 갖는 파이프 교정기용 교정롤러
JP6839786B2 (ja) 2018-04-13 2021-03-10 株式会社中田製作所 角管成形方法及び装置
CN113492164A (zh) * 2020-04-02 2021-10-12 上科机械(苏州)有限公司 一种可调间距式压头和支撑机构

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
FR1188572A (fr) * 1956-11-09 1959-09-23 Neunkircher Eisenwerk Ag Dispositif pour le laminage de tubes de section triangulaire ou quadrangulaire à partir de tubes de section circulaire
GB1033481A (en) * 1963-01-29 1966-06-22 Contubind Sa Improvements in or relating to rolling mills
AT399674B (de) * 1992-08-03 1995-06-26 Voest Alpine Ind Anlagen Vorrichtung zum kontinuierlichen umformen eines metallischen rohres
DE4447397C2 (de) * 1994-12-23 2000-09-21 Mannesmann Ag Universalformwalzgerüst zum kontinuierlichen Konturformen von Rohren
US5823036A (en) * 1997-08-19 1998-10-20 Braner Usa, Inc. Roll forming machine and method for changing rolls

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109127736A (zh) * 2018-09-11 2019-01-04 镇江北新建材有限公司 一种墙体龙骨生产用轧辊高度快速变更方法和装置

Also Published As

Publication number Publication date
ATE296691T1 (de) 2005-06-15
WO2000064606A1 (en) 2000-11-02
DE60020545D1 (de) 2005-07-07
EP1169150A1 (de) 2002-01-09
DE60020545T2 (de) 2006-04-27
JP2000301233A (ja) 2000-10-31

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