FR2517994A1 - PROCESS FOR CONTINUOUSLY FORMING A SPLIT TUBE FROM PLANE MATERIAL AND FOR BENDING MARGINAL REGIONS OF STRIPS OR SHEETS TO BE ASSEMBLED - Google Patents

PROCESS FOR CONTINUOUSLY FORMING A SPLIT TUBE FROM PLANE MATERIAL AND FOR BENDING MARGINAL REGIONS OF STRIPS OR SHEETS TO BE ASSEMBLED Download PDF

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Publication number
FR2517994A1
FR2517994A1 FR8220212A FR8220212A FR2517994A1 FR 2517994 A1 FR2517994 A1 FR 2517994A1 FR 8220212 A FR8220212 A FR 8220212A FR 8220212 A FR8220212 A FR 8220212A FR 2517994 A1 FR2517994 A1 FR 2517994A1
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France
Prior art keywords
strip
edge
forming
groove
strips
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.)
Granted
Application number
FR8220212A
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French (fr)
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FR2517994B1 (en
Inventor
Walter Hess
Franz Nicolai
Otto Gotting
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.)
Vodafone GmbH
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Mannesmann AG
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Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of FR2517994A1 publication Critical patent/FR2517994A1/en
Application granted granted Critical
Publication of FR2517994B1 publication Critical patent/FR2517994B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
    • 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
    • B21C37/0822—Guiding or aligning the edges of the bent sheet

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

The invention relates to a method for the continuous forming of flat material to give a slotted tube and for bending strip or sheet edge regions to be connected. In order to make possible forming of the strip edges to give a slotted tube without the formation of edge waves, it is proposed that the central strip region, having any desired shape, be supported in a rigidly arranged roller or roll guide and the border strips be continuously deformed on both sides in a grooved guide in such a way that the material of the strip edge region flows up against this predetermined groove and is plastically deformed as far as the outer edge.

Description

Procédé de formage continu d'un tube fendu en partant de matière plans et de pliage de régions marginales de feuillards ou de tales qu'il s'agit d'assembler0
De façon connue, le pliage des bords s'effectuait jusqu'ici par exemple au moyen d'étampes, et il n'était dono pas possible d'effectuer le formage Jusqutau bord et il se formait un toit sur le tube à souder.Process for the continuous forming of a split tube starting from planar material and for bending marginal regions of strips or tales to be assembled0
In known manner, the folding of the edges has hitherto been carried out for example by means of stamps, and it was therefore not possible to carry out the forming up to the edge and a roof was formed on the tube to be welded.

Par le DE-AS 1 016 673, on connaît un formage qui part d un pliage des bords au moyen de rouleaux de profilage. Toutefois, le procédé décrit par ce document conduit à la formation dondulation dans la région du bord do la bande. Les autres tapes de formage s'effectuent ici sur des rayons de cannelure donnant une grande surface portante, ce qui entraîne de grandes ddpenses d'outillage. En outre, il se produit une grande charge aux bords et une usure des cylindres dans la région des collets de cylindre qui servent à guider la bande, car à cause du mouvement de rotation on ne peut pas obtenir de déroulement sur le bord. From DE-AS 1 016 673, a forming is known which starts from a bending of the edges by means of profiling rollers. However, the process described by this document leads to the formation of ripples in the region of the edge of the strip. The other forming steps are carried out here on groove radii giving a large bearing surface, which results in large tool expenditure. In addition, there is a great load on the edges and wear of the rollers in the region of the cylinder collars which serve to guide the strip, because because of the rotational movement it is not possible to unwind on the edge.

Les mêmes inconvnients se présentent dans le procédé décrit par le DE-AS 2 716 940. The same drawbacks arise in the process described by DE-AS 2 716 940.

Le problème de l'invention est de fournir un procédé de pliage d'une tale ou d'un feuillard à transformer en tube fendu, pour procédés de pressage ou de soudage de tubes gracie à un calibrage par refoulement, qui permette de façon simple, avec des temps de conversion réduits, une moindre usure, un fonctionnement str et sans ondulations au bord, de former Jusqu l'arête les bords dune tôle ou d'un feuillard qu'il s'agit de transformer en tube fendu. The problem of the invention is to provide a method of folding a sheet or a strip to be transformed into a split tube, for pressing or welding processes of tubes thanks to a calibration by discharge, which allows in a simple manner, with reduced conversion times, less wear, str operation and without ripples at the edge, forming Up to the edge the edges of a sheet or strip which it is a question of transforming into a split tube.

Pour résondre cde problèm, l'invention propose un procédé caractérisé par le fait que l'on soutient la région médiane de la bande avec une forme quelconque dans un guidage à rouleaux ou à cylindres disposé de façon fixe et que l'on déforme de façon continue les bandes marginales dans un guide à cannelure de telle sorte que la matière de la région marginale de la bande s'applique continuellement contre cette cannelure prédéterminée et se déforme plastiquement Jusqutau bord extérieur. To solve this problem, the invention proposes a method characterized by the fact that the central region of the strip is supported with any shape in a roller or roller guide fixedly disposed and that it is deformed so continues the marginal bands in a grooved guide so that the material of the marginal region of the band is applied continuously against this predetermined groove and is plastically deformed up to the outer edge.

Le procédé selon l'invention offre une grande sécurité de production et une grande économie avec des moyens techniques réduits. On évite le déchet da aux ondulations du bord. The method according to the invention offers great production security and great savings with reduced technical means. We avoid waste da to the ripples of the edge.

La disposition d'un dispositif selon l'invention est représentée schématiquement par les dessins annexés donnés à titre d'exemples non limitatifs et sur lesquels s
- la figure 1 est une perspective de la cage de formage par refoulement
- la figure 2 est une coupe suivant la ligne A-B avec superposition de la course de déformation du bord 2t de la bande
- la figure 3 montre l'allure du bord 2' do la bande en direction longitudinale dans la cannelure de refoulement et de réduction
- la figure 4 montre les conditions de déformation dans le cas d'un profilé ouvert.The arrangement of a device according to the invention is represented diagrammatically by the appended drawings given by way of nonlimiting examples and in which s
- Figure 1 is a perspective of the discharge forming cage
- Figure 2 is a section along line AB with superposition of the deformation stroke of the edge 2t of the strip
- Figure 3 shows the shape of the edge 2 'of the strip in the longitudinal direction in the delivery and reduction groove
- Figure 4 shows the deformation conditions in the case of an open profile.

Sur la figure 1, la bande à former 1 est représentée en perspective, avec lZallure du bord 2 de la bande et la cannelure de refoulement et de réduction 3 indiquée en coupe, avec les plans de coupe À et 3.  In FIG. 1, the strip to be formed 1 is shown in perspective, with the shape of the edge 2 of the strip and the discharge and reduction groove 3 indicated in section, with the cutting planes A and 3.

Sur la figure 2, les coupes A et B situées l'une derribre l'autre dans l'espace à une distance
D sont représentées l'une au dessus de l'antre, F montrant les bords préformés et G les bords refouls. In FIG. 2, the sections A and B located one demarcate the other in space at a distance
D are represented one above the lair, F showing the preformed edges and G the repressed edges.

Le pointillé est la course n des bords 2 de la bande, de X à Y, en direction longitudinale. En partant des grandeurs C et E, on calcule le rapport de transformation.The dotted line is the course n of the edges 2 of the strip, from X to Y, in the longitudinal direction. Starting from the magnitudes C and E, the transformation ratio is calculated.

La figure 3 montre à nouveau 1 'allure du bord de la bande, comme sur la figure 2, du point X à Y avec la distance D.  FIG. 3 again shows the shape of the edge of the strip, as in FIG. 2, from point X to Y with the distance D.

La figure 4 montre les mimes conditions de déformation que la figure 2, sur un profilé ouvert. Figure 4 shows the same deformation conditions as Figure 2, on an open profile.

Le bord de la bande ou de la t81e entre dans le dispositif selon l'invention ou bien on fait passer le dispositif le long de la tale. Il s'effoctue alors un pliage et un refoulement dans la région extérieure de bord et plus précisément, de telle sorte que le bord n1 est soumis à aucun allongement longitudinal et que le bord du feuillard ou de la tôle, formé au rayon calibré à ltavance, quitte l'installation selon l'invention sans ondulations. The edge of the strip or of the t81e enters the device according to the invention or else the device is passed along the tale. It then performs a folding and a discharge in the outer edge region and more precisely, so that the edge n1 is not subjected to any longitudinal elongation and that the edge of the strip or sheet, formed with the radius calibrated in advance , leaves the installation according to the invention without undulations.

Il convient de noter que lors du formage des deux bords de la bande, on peut avantageusement appliquer tout d'abord une pression perpendiculaire au bord 2 de la bande (point X dans la partie de cannelure A). Le formage par pliage d'un tronçon
D de la cannelure parcourt alors le trajet 2 vers
Y (partie de cannelure 3), où il sty superpose de façon croissante un formage par refoulement dont le maximum se situe en Y.It should be noted that when forming the two edges of the strip, it is advantageous to apply first of all a pressure perpendicular to the edge 2 of the strip (point X in the groove part A). Forming by bending a section
D of the groove then travels path 2 towards
Y (part of groove 3), where it sty increasingly superimposes a forming by repression whose maximum is located in Y.

Par ailleurs le rapport de déformation résultant des mesures C d'environ 1 z 1 et de l'angle CX an
E point Y, peut atre choisi de telle sorte qu'gel ne se produit aucun allongement longitudinal du bord de la bande.Furthermore, the strain ratio resulting from measurements C of approximately 1 z 1 and of the angle CX an
At point Y, can be chosen so that there is no longitudinal elongation of the edge of the strip.

Dans tous les cas il est préférable que l'angle c ne ne soit pas inférieur à 30 .  In all cases it is preferable that the angle c is not less than 30.

Claims (4)

REVENDICATIONS 1. Procédé de formage continu d'un tube fendu en partant de matière plane et de pliage de régions marginales de feuillards ou de tales qu'il s'agit d'assembler, caractérisé par le fait que lton soutient la région médiane de la bande (i) avec une forme quelconque dans un guidage à rouleaux ou à cylindres disposé de façon fixe et que selon déforme de façon continue les bandes inarginales dans un guide à cannelure (3) de telle sorte que la matière de la région marginale de la bande (1) s'applique continuellement contre cette cannelure predéterminée (3) et se déforme plastiquement jusqu'au bord extérieur. 1. A method of continuously forming a split tube from flat material and folding marginal regions of strips or tales to be assembled, characterized in that it supports the middle region of the strip (i) with any shape in a roller or roller guide fixedly arranged and that according to continuously deforms the inarginal bands in a grooved guide (3) so that the material of the marginal region of the band (1) is applied continuously against this predetermined groove (3) and is plastically deformed to the outer edge. 2,- Procédé selon la revendication 1, caractérisé par le fait que lors du formage des deux bords de la bande, on applique toïit d'abord une pression perpendiculairement au bord (a) de la bande (point X dans la partie de cannelure A) et que le formage par pliage d'un tronçon D de la cannelure parcourt le trajet (2t3 vers Y (partie de cannelure B), où il sty superpose de façon croissante un formage par refoulement dont le maximum se situe en Y. 2, - Method according to claim 1, characterized in that during the forming of the two edges of the strip, roof is first applied pressure perpendicular to the edge (a) of the strip (point X in the groove part A ) and that the forming by folding of a section D of the groove traverses the path (2t3 towards Y (part of groove B), where it sty increasingly superimposes a forming by discharge whose maximum is located in Y. 3.- Procédé selon l'une des revendications 1 et 2, caractérisé par le fait que le rapport de déformation, résultant des mesures C d'environ 1 : 1  3.- Method according to one of claims 1 and 2, characterized in that the deformation ratio, resulting from the measurements C of about 1: 1 E et de l1angleau point Y, est choisi de telle sorte qu'il ne se produit aucun allongement longitudinal du bord de la bande. E and the point Y, is chosen so that there is no longitudinal elongation of the edge of the strip. 4.- Procédé selon l'une des revendications I à 3, caractérisé par le fait que l'anglen'est pas inférieur à 30e.  4.- Method according to one of claims I to 3, characterized in that the angle is not less than 30e.
FR828220212A 1981-12-16 1982-12-02 PROCESS FOR CONTINUOUSLY FORMING A SPLIT TUBE FROM PLANE MATERIAL AND FOR BENDING MARGINAL REGIONS OF STRIPS OR SHEETS TO BE ASSEMBLED Expired - Fee Related FR2517994B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3150382A DE3150382C2 (en) 1981-12-16 1981-12-16 Process for the continuous molding of flat material into a slotted tube

Publications (2)

Publication Number Publication Date
FR2517994A1 true FR2517994A1 (en) 1983-06-17
FR2517994B1 FR2517994B1 (en) 1990-07-20

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FR828220212A Expired - Fee Related FR2517994B1 (en) 1981-12-16 1982-12-02 PROCESS FOR CONTINUOUSLY FORMING A SPLIT TUBE FROM PLANE MATERIAL AND FOR BENDING MARGINAL REGIONS OF STRIPS OR SHEETS TO BE ASSEMBLED

Country Status (4)

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JP (1) JPS58107221A (en)
DE (1) DE3150382C2 (en)
FR (1) FR2517994B1 (en)
IT (1) IT1153618B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011117166A1 (en) * 2011-10-05 2013-04-11 Sms Meer Gmbh Plant and method for the continuous molding of longitudinally slit pipes
CN105382059B (en) * 2015-12-04 2018-03-06 庄瑞兴 The bar folder of replaceable bending wheel group

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2217985A (en) * 1939-09-16 1940-10-15 Nat Supply Co Method and apparatus for making tubular members
DE1016675B (en) * 1955-05-18 1957-10-03 Demag Ag Device for rounding sheet metal strips for the production of welded pipes with longitudinal seams, especially those of larger diameter
FR1160041A (en) * 1955-10-18 1958-07-07 Pirelli General Cable Works Method and apparatus for manufacturing tubes or sheaths from strip, in particular for wrapping electric cables
FR2019420A1 (en) * 1968-09-11 1970-07-03 Torrance Machinery Engin
DE2529466A1 (en) * 1974-07-31 1976-02-19 Huette Krems Ges Mbh Krems Production of welded tube with various dimensions - has roll assemblies to bend flat sheet to produce pipe ready for welding
DE2608410A1 (en) * 1976-03-01 1977-09-08 Kurt Hirz Production of longitudinally seam welded tube - has successive sets of rollers to bend steel strip to cylindrical form
FR2348761A1 (en) * 1976-04-19 1977-11-18 Nippon Steel Corp METHOD AND APPARATUS FOR THE MANUFACTURE OF METAL TUBES

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60408C (en) * W.BROWN-HILL in Bloxwich, Iron Works, Walsall, Stafford, England Manufacture of metal pipe workpieces from glowing metal strips
AT106952B (en) * 1926-01-16 1927-08-10 Johann Kozicz Method and device for the production of pipes by bending sheet metal strips.
JPS54145361A (en) * 1978-05-02 1979-11-13 Nippon Steel Corp Roller forming cylindrical pipe
JPS5699015A (en) * 1980-01-08 1981-08-10 Hitachi Metals Ltd Assembly type fin pass roll

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2217985A (en) * 1939-09-16 1940-10-15 Nat Supply Co Method and apparatus for making tubular members
DE1016675B (en) * 1955-05-18 1957-10-03 Demag Ag Device for rounding sheet metal strips for the production of welded pipes with longitudinal seams, especially those of larger diameter
FR1160041A (en) * 1955-10-18 1958-07-07 Pirelli General Cable Works Method and apparatus for manufacturing tubes or sheaths from strip, in particular for wrapping electric cables
FR2019420A1 (en) * 1968-09-11 1970-07-03 Torrance Machinery Engin
DE2529466A1 (en) * 1974-07-31 1976-02-19 Huette Krems Ges Mbh Krems Production of welded tube with various dimensions - has roll assemblies to bend flat sheet to produce pipe ready for welding
DE2608410A1 (en) * 1976-03-01 1977-09-08 Kurt Hirz Production of longitudinally seam welded tube - has successive sets of rollers to bend steel strip to cylindrical form
FR2348761A1 (en) * 1976-04-19 1977-11-18 Nippon Steel Corp METHOD AND APPARATUS FOR THE MANUFACTURE OF METAL TUBES

Also Published As

Publication number Publication date
IT1153618B (en) 1987-01-14
JPS58107221A (en) 1983-06-25
DE3150382A1 (en) 1983-07-14
FR2517994B1 (en) 1990-07-20
DE3150382C2 (en) 1986-04-30
IT8224070A0 (en) 1982-11-04

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