[go: up one dir, main page]

EP0014461A1 - Dispositif pour cintrer des tubes métalliques - Google Patents

Dispositif pour cintrer des tubes métalliques Download PDF

Info

Publication number
EP0014461A1
EP0014461A1 EP80100574A EP80100574A EP0014461A1 EP 0014461 A1 EP0014461 A1 EP 0014461A1 EP 80100574 A EP80100574 A EP 80100574A EP 80100574 A EP80100574 A EP 80100574A EP 0014461 A1 EP0014461 A1 EP 0014461A1
Authority
EP
European Patent Office
Prior art keywords
pressure piece
segment
tube
bending device
bending
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
EP80100574A
Other languages
German (de)
English (en)
Other versions
EP0014461B1 (fr
Inventor
Günter Rothenberger
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.)
Rothenberger & Co Werkzeuge-Maschinen KG GmbH
Original Assignee
Rothenberger & Co Werkzeuge-Maschinen KG GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rothenberger & Co Werkzeuge-Maschinen KG GmbH filed Critical Rothenberger & Co Werkzeuge-Maschinen KG GmbH
Priority to AT80100574T priority Critical patent/ATE2486T1/de
Publication of EP0014461A1 publication Critical patent/EP0014461A1/fr
Application granted granted Critical
Publication of EP0014461B1 publication Critical patent/EP0014461B1/fr
Expired legal-status Critical Current

Links

Images

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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
    • B21D7/063—Pliers with forming dies

Definitions

  • the invention relates to a bending device for metal pipes with and without plastic sheathing, in particular for installation pipes, consisting of a segment of a flat cylinder, on the circumference of which a groove defining the bending radius R 1 of the pipe is arranged and which is an abutment for the tangential mounting of the pipe to the groove is assigned, as well as from a lever which can be pivoted concentrically around the segment and on which a thrust piece with a working surface is arranged on an axis parallel to the segment axis and which has an approximately semicircular, concave cross section with the radius R o in a plane running parallel to the axes .
  • a pipe bending device with a toroidal pressure piece which forms a rigid unit with an actuating lever.
  • this pressure piece cannot be pivoted about a concentric axis of the cylinder segment in one pass by sliding on the tube. Rather, the pressure piece is guided on the edge of the cylinder segment on rails, so that by repeatedly levering the pressure piece around imaginary pivot axes that lie on the rails, the tube is pressed in sections into the groove of the cylinder segment.
  • the pressure piece is therefore a type of molding press, the inner shape of which corresponds to the outer shape of the finished bent tube.
  • GB-PS 1 384 575 discloses a bending device for the production of additional curvatures on pipes which have already been bent, the principle of which acts as a kind of kinematic reversal of the principle of action of the bending device described at the outset.
  • the pressure member is fixedly arranged, and the Zylinderse g ment with the circumferential groove is hydraulically driven, against the thrust piece to pivot.
  • the pressure piece is designed in the manner of a gutter, ie it runs straight in the pipe direction. This means that no other effects can be achieved than with the object described at the beginning.
  • the pressure piece is formed as an essentially cuboid body made of g e, which on its side facing the tube or the segment has a working surface which is designed as a half-cylinder surface and is complementary to the tube to be bent.
  • a working surface is concave, but only in relation to a cross section that lies in a plane that runs parallel to or through the axes of the segment and the pressure piece.
  • the surface lines are straight.
  • tubes made of soft copper can be easily bent down to a ratio of bending radius R 1 to tube diameter D of approximately 3: 1.
  • this applies to installation pipes made of soft copper with outside diameters of 15, 18 or 22 mm, for example, and a wall thickness of 1.0 to 1.5 mm.
  • the smallest possible bending radius is aimed at, the bending should be crease-free, but in any case without cracks.
  • Another criterion is the lowest possible flattening, ie a deviation from the original circular cross-section of the pipe. In general, a flattening of about 10% of the original pipe diameter is considered tolerable.
  • the pressure piece or the slide shoe If the pressure piece or the slide shoe is moved relative to the pipe about the segment axis, the pressure piece adjusts itself essentially to the pipe surface closest to the pressure piece axis in such a way that the jacket lines of the working surface run tangentially to the pipe surface. Due to the unavoidable friction, which can be reduced by lubricants but not eliminated, the pressure piece has a tendency to tilt around its axis, which increases the contact pressure due to the given geometric conditions, although the distance between the axes of the segment and the pressure piece remains unchanged remains. As a result of the considerable ratio, this process takes place on the edge of self-locking, with considerable tensile forces being exerted on the outside fibers of the tube.
  • the prior art also includes a bending apparatus of the character described, wherein the pressure piece is constructed as a roller, which is a negative torus, the concave Umcardun ie sisation g of Roll is formed by a half arc. It was surprisingly found that this also does not significantly improve the conditions, apparently because the pipe to be bent bears under the influence of the considerable deformation forces on various diameters on the roller surface, so that a noticeable braking effect is also produced thereby.
  • Pipes coated with plastic cannot be processed with the specified bending devices, even with large bending radii, because the sliding shoe peels off the plastic skin, so that the bent pipe would have to be discarded.
  • the invention has for its object to provide a bending device of the type described in the introduction, with which pipes made of soft copper as well as hard copper as well as brass and steel pipes with the smallest possible ratio R 1 : D can be bent reliably, with as little flattening as possible and with low power requirements.
  • the object is achieved in the bending device specified at the outset according to the invention in that the pressure piece is additionally concave in a plane I-I running perpendicular to the axes.
  • this teaching means that the pressure piece is supported on the pipe only with two substantially semicircular lines, or that the center of the pressure piece, which is in the immediate vicinity of the pressure piece axis, is set back with respect to the pipe surface.
  • the measure according to the invention in contrast to the deterioration in the conditions to be expected as a result of Hertzian relationships, leads to a significant improvement:.
  • pipes made of hard copper, brass and steel with an outer diameter of 18 mm could easily be provided with a bending radius between 45 and 65 mm, whereby a hardness saving of around 30% (under otherwise the same transmission ratios) was observed for hard copper compared to soft copper.
  • the pipe surface was perfect and showed no wrinkles. No impression was observed at the site of the abutment either.
  • the flattening was between 0.8 and 1.2 mm, i.e. between about 4.5 and 6.7%. This is significantly less than the limit values of 10% of the pipe diameter specified in the relevant processing guidelines.
  • a particularly simple to manufacture and effective embodiment of the subject matter of the invention is obtained when the working surface of the pressure piece is designed as a toroidal or toroidal surface, the large radius R 2 being between two and ten times the bending radius R 1 of the tube.
  • An optimum saving of force is achieved when the large radius of the torus is between four and six times the bending radius R 1 of the tube, with a certain optimization of the ratios, for example with the ratio R 2 : R 1 at 5: 1, being observed.
  • the torus surface set in relation to the circumference of the segment, extends over an angular range " ⁇ " between 40 and 50 degrees, it being expedient to arrange the axis of the pressure piece slightly eccentrically in its longitudinal direction, so that the with the Tube cooperating ends of the pressure piece form lever arms of different lengths, the length of which is designated by "X" and "Y".
  • the length "Y" of the lever arm which is furthest away from the segment in the working position can be selected to be about 20-40% shorter or longer than the length "X" of the other lever arm.
  • FIG. 1 and 2 show a segment 10 in the form of a flat cylinder which is provided with a circumferential groove 11 which has a semicircular cross section which is complementary to the pipe to be bent. When the tube is bent, it lies in the groove 11 so that it determines the bending radius.
  • Two flanges 12 and 13 are formed on both sides of the groove 11, the outer diameter of which corresponds to the bending radius R 1 .
  • An axis 14 is arranged concentrically to the groove 11 in the segment 10, which is surrounded by two hub parts 15 and 16, which protrude slightly on both sides of the segment 10 beyond its boundary surfaces.
  • the segment 10 has arisen in that a smaller part has been removed on one side to form a flat stop surface 17.
  • part of the flanges 12 and 13 was additionally removed along a flat surface, each but so that the bottom of the groove 11 remained unaffected.
  • a base plate 20 is clamped against the stop surface 17 by means of a screw 19, which on its underside protrudes noticeably beyond the segment 10 and the axis 14 and there has a clamping surface 21 of reduced thickness for clamping the device in a vice.
  • the base plate 20 contains a recess 22 which extends over the entire height of the segment 10 and is delimited on one side by an inclined surface 23 which merges approximately tangentially into the groove base.
  • the recess 22 ' is on the opposite side with a Abutment 24 provided which forms a semicircular cutout 25 with a projection 26.
  • the position and shape of the abutment 24 are such that a tube 27 according to FIG. 1 can be inserted into the cutout 25 and into the groove 11 such that it extends tangentially to the groove base and perpendicular to the stop surface 17.
  • the point of contact of the tangent lies in a plane E1, which runs parallel to the axis 14 and to the stop surface 17.
  • a forked lever 28 can be pushed onto the axis 14 in the radial direction, namely by means of a slot 29 which is adapted to the axis 14.
  • the lever 28 has two legs 28a and 28b which encompass the segment 10 and the tube 27. Between the legs 28a and 28b there is also a pressure piece 30 which is pivotable on an axis 31 parallel to the axis 14 and has a working surface 32 which is semicircular in cross section, ie in a plane which is parallel to the axes 14 and 31 is trained.
  • the pressure piece or the working surface is additionally concave in a plane running perpendicular to the axes 14 and 31, which is designated by 1-1 in FIG.
  • a torus is a tubular ring-shaped mathematical body, which is rotated by a circle around a axis that lies in its plane and does not intersect it. It goes without saying that even slight deviations from the mathematically exact definition are permissible.
  • the working surface 32 is arranged on a long side of the otherwise cuboidal pressure piece 30, the ends of the toroidal surface being well rounded at the transition points A and B into the end faces 33 and 34 .
  • the lines of intersection of the torus surface with the end faces 33 and 34 are semi-circles, neglecting the rounding, which correspond to the cross section of the pressure piece 30 along the axis 31.
  • the length and arrangement of the pressure piece 30 in the lever 28 are made according to FIG. 1 so that in the starting position the one transition point A lies essentially in the plane E 1 , which runs perpendicular to the tube 27 and radially to the segment axis 14.
  • the other transition point B lies in a plane E2, which likewise runs radially to the segment axis 14, but encloses an angle of 45 degrees with the plane E 1 .
  • the pressure piece 30, which can also be referred to as a sliding shoe, rests on the (semicircular) transition points A and B on the tube 27 when only a slight force is exerted on the lever 28 in the clockwise direction.
  • a handle bar 35 through which the lever 28 is extended approximately four to five times (not shown).
  • FIG. 5 shows a bending device which is largely the same, in which the working surface of the pressure piece 30 1 is composed of partial surfaces, namely three rollers 39 1 ; 39 2 and 39 3 with a half, hollow toroidal cross section.
  • the working surface of the pressure piece 30 1 is composed of partial surfaces, namely three rollers 39 1 ; 39 2 and 39 3 with a half, hollow toroidal cross section.
  • the two outer rollers 39 1 and 39 3 rest against the (straight) tube 27 with linear contact.
  • the penetration points of the semicircular lines of contact through the plane of the drawing are highlighted by two small circles; These are the analog transition points A and 8 according to FIG. 1.
  • the rollers are arranged on axes 31 1 , 31 2 and 31 3 , which run parallel to the axis 14 of the segment 10.
  • the central axis 31 2 is at the same time the axis through which the pressure piece 30 1 is pivotally mounted in the lever 28, here also largely matching the object of FIG. 1.
  • the pressure piece 30 1 consists of a U-shaped profile, the legs of which are penetrated by said axes 31 1 , 31 2 and 31 3 .
  • the central roller 39 2 is offset to the outside with respect to the two external rollers 39 1 and 39 3 with respect to the segment axis 14.
  • This offset has such a dimension that a circle tangent to the rollers in the cutting plane shown has a radius which lies between the one to eighteen times the bending radius R 1 of the tube 27, preferably between four to six times the bending radius R 1 of the tube .
  • FIG. 1 A section from FIG. 1 is shown in FIG.
  • the upper part of the segment 10 can be seen with the groove 11 and the stop surface 17 to which the base plate 20 is clamped by means of the screw 15.
  • the tube 27 is inserted; to this extent there is complete agreement with FIG. 1.
  • a retaining device 40 is arranged on the side of the base plate 20 or the abutment 24 opposite the segment 10. This consists of a pawl 41, the appearance of which is illustrated by FIG. 7.
  • the pawl 41 is made of a plate and can be pivoted in a plane that runs parallel to the base plate 20 carrying the abutment 24.
  • the clear distance between the base plate 20 and the pawl 41 has the dimension "s". In practice, this dimension "s" can be between half and several pipe diameters.
  • the pawl 41 is pivotable about an axis 42 which is formed by a screw 43 which is screwed to the base plate 20. The distance between the base plate and the pawl 41 is maintained by a spacer sleeve 43, the screw connection being made in such a way that the pawl 41 is freely rotatable on the screw 43.
  • the axis 42 runs parallel to the longitudinal axis of the tube 27.
  • the pawl 41 has a bore 44 for the insertion of the screw 43, an actuating lever 45 and a pawl nose 46, the inner surface 47 of which extends essentially concentrically to the central axis of the bore 44 and thus to the pivot axis.
  • a low eccentricity ensures that an increasing transverse force is exerted on the tube 27 when the actuating lever 45 is pressed down in the direction of the arrow 48. Due to this transverse force, the tube 27 is pressed away from the segment 10 into the cutout 25 of the abutment 24.
  • the pawl 41 practically completely prevents both the elastic transverse movement of the tube and the slipping, so that the tube does not undulate in any case. Due to the spacer sleeve 43 or the distance "s", the pawl 41 generates a bending moment on the tube 27 which is opposite to the elastic deflection and which holds the tube 27 in the predetermined position in the groove 11. In this way, lateral movement of the tube 27 out of the groove 11 is largely eliminated, so that the flattening of the tube to an oval cross section, which otherwise occurs during bending and is not prevented by the flanges 12 or 13 (FIG. 2), is largely prevented.
  • the additional device according to FIGS. 6 and 7 ensures through its interaction with the other parts of the device that the quality of the bent tube is additionally improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP80100574A 1979-02-09 1980-02-05 Dispositif pour cintrer des tubes métalliques Expired EP0014461B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80100574T ATE2486T1 (de) 1979-02-09 1980-02-05 Biegevorrichtung fuer metallrohre.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2904885 1979-02-09
DE19792904885 DE2904885A1 (de) 1979-02-09 1979-02-09 Biegevorrichtung fuer metallrohre

Publications (2)

Publication Number Publication Date
EP0014461A1 true EP0014461A1 (fr) 1980-08-20
EP0014461B1 EP0014461B1 (fr) 1983-02-16

Family

ID=6062521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100574A Expired EP0014461B1 (fr) 1979-02-09 1980-02-05 Dispositif pour cintrer des tubes métalliques

Country Status (5)

Country Link
US (1) US4355528A (fr)
EP (1) EP0014461B1 (fr)
JP (1) JPS55136519A (fr)
AT (1) ATE2486T1 (fr)
DE (1) DE2904885A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501545A1 (fr) * 1981-03-16 1982-09-17 Liri Costruzioni Mecc Appareil portatif a cintrer les tuyaux a commande electromecanique
EP0352236A3 (fr) * 1988-07-19 1991-04-10 C.M.L. COSTRUZIONI MECCANICHE LIRI S.r.l. Mini machine portative pour le pliage de tubes à entraínement manuel ou motorisé et comportant un dispositif d'engagement/dégagement automatique
WO2016144168A1 (fr) * 2015-03-10 2016-09-15 Hogerwerf Pieter Arie Dispositif de pliage de tuyau

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4389873A (en) * 1981-03-11 1983-06-28 Imperial Clevite Inc. Tube bender construction
US4691555A (en) * 1984-11-15 1987-09-08 Vaughan Donald R Tube bending tool
US4719783A (en) * 1986-05-08 1988-01-19 Joan G. Frost Portable pipe bending machine
DE9103368U1 (de) * 1991-03-19 1991-06-20 Hewing GmbH, 4434 Ochtrup Vorrichtung zum Biegen von Rohren
US5148695A (en) * 1991-11-21 1992-09-22 Ellis Harry S Adjustable pipe and tubing bender
IT227227Y1 (it) * 1992-03-12 1997-09-16 Cml Costr Mecc Liri Srl Contromatrice a gola sagomata per curvatubi con testa di piegatura girevole a matrice a puleggia a gola e contromatrice.
ES2065821B1 (es) * 1992-08-28 1997-06-16 Hermanos Arrese Talleres Lasqu Maquina curvadora de tubos.
US5694800A (en) * 1995-01-26 1997-12-09 Ineco Industrial Navarra De Equipos Y Comercio, S.A. Perfected counterdie for pipe bending machines
KR0182069B1 (ko) * 1995-06-22 1999-04-01 송병준 컷팅블레이드의 절곡시스템
US7024905B1 (en) * 2003-04-28 2006-04-11 Aaron Carlson Portable electrical conduit pipe bending system
JP4515056B2 (ja) * 2003-08-01 2010-07-28 三桜工業株式会社 管の曲げ加工装置
US20050183488A1 (en) * 2004-02-19 2005-08-25 Cheng-Chung Chen Plate and tube bending device
US7162905B1 (en) 2005-04-20 2007-01-16 Mckay Acquisition, Inc. Pipe bending pressure die with reversible exit block
PE20080251A1 (es) 2006-05-04 2008-04-25 Boehringer Ingelheim Int Usos de inhibidores de dpp iv
EP2076340A4 (fr) * 2006-10-26 2010-06-23 Kapman Ab Outil pour cintrer des tuyaux et gabarit destiné à être utilisé dans un tel outil
US20080190164A1 (en) * 2007-02-09 2008-08-14 Boon Christopher J Tube bending apparatus
JP2008281263A (ja) * 2007-05-09 2008-11-20 Hitachi Cable Ltd 熱交換器
ATE535323T1 (de) * 2008-10-17 2011-12-15 Wafios Ag Stützbackenanordnung zum gleitenden seitlichen abstützen von stab- und rohrförmigen werkstücken an biegemaschinen
DE102011116636B4 (de) * 2011-10-20 2017-05-04 Audi Ag Rohrbiegevorrichtung
CN102601183A (zh) * 2012-03-19 2012-07-25 昆山长运电子工业有限公司 多角度多直径工件折弯装置
ITRM20120620A1 (it) * 2012-12-06 2014-06-07 Libero Angelo Massaro Contromatrice ad inserti, per macchine di curvatura di tubi metallici.
CN103878215A (zh) * 2012-12-19 2014-06-25 漳州市昌龙汽车附件有限公司 一种简易电动弯管机
CN107147040B (zh) * 2017-04-05 2018-09-18 国网浙江嘉善县供电公司 一种引线制作台的弯线机构
CN107913927B (zh) * 2017-09-18 2024-05-03 浙江长兴和良智能装备有限公司 一种弯管机
TWI633948B (zh) * 2017-11-14 2018-09-01 鄭捷宇 彎折裝置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR503326A (fr) * 1918-08-08 1920-06-08 Auto Motive And Accessory Cio Perfectionnements aux engrenages à denture interne
US1662131A (en) * 1927-01-05 1928-03-13 Schonfield Leslie Tube and like bending machine
US1859406A (en) * 1931-02-20 1932-05-24 Meighan George William Pipe and conduit bender
CH204566A (de) * 1938-08-31 1939-05-15 Vollmerhaus Ewald Kette aus gelenkig miteinander verbundenen Druckstücken an Rohrbiegemaschinen.
US2171907A (en) * 1936-08-05 1939-09-05 Imp Brass Mfg Co Tube bender
US2695538A (en) * 1951-03-19 1954-11-30 Tal Bender Inc Ratchet and pawl actuated lightweight tube benders
US2820504A (en) * 1955-10-21 1958-01-21 Henderson Robert Halsey Pipe or conduit benders

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE462237C (de) * 1925-12-24 1928-07-06 Nieuport Astra Sa Kuehler fuer Flugzeuge aus hohlen, die Tragflaeche bildenden Wandungen
DE610559C (de) * 1932-04-06 1935-03-12 Asmus & Lorenz Vorrichtung zum Biegen von Rohren aus weichen Metallen
US2464800A (en) * 1944-07-15 1949-03-22 Imp Brass Mfg Co Portable tube bending tool
US2654279A (en) * 1950-04-19 1953-10-06 Tomarin Marcus Tube bending hand tool with a rocking pressure member
US2757562A (en) * 1953-05-01 1956-08-07 Imp Brass Mfg Co Portable, hand operated, tube bending tool
DE1201662B (de) * 1960-08-11 1965-09-23 David Kotthaus A G Rohrbiegewerkzeug
US3380283A (en) * 1965-01-11 1968-04-30 Parker Hannifin Corp Tube bending tool
US3410125A (en) * 1967-02-02 1968-11-12 Pines Engineering Co Inc Tubular stock bending machine
GB1384575A (en) * 1972-08-09 1975-02-19 Musson I M Tube bending apparatus
GB1463522A (en) 1974-09-11 1977-02-02 Russel Bowen Systems Ltd Bending machines
DE2715178A1 (de) * 1976-04-07 1977-10-27 Jacob Pieter Schuler Handwerkzeug zum biegen von rohren
SU615989A1 (ru) * 1976-08-10 1978-07-25 Timoshinskij Gennadij N Роликоопора к трубогибочному станку
DE2835405C3 (de) * 1978-08-12 1982-06-24 DAKO-Werkzeugfabriken David Kotthaus GmbH & Co KG, 5630 Remscheid Handhebelrohrbieger

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR503326A (fr) * 1918-08-08 1920-06-08 Auto Motive And Accessory Cio Perfectionnements aux engrenages à denture interne
US1662131A (en) * 1927-01-05 1928-03-13 Schonfield Leslie Tube and like bending machine
US1859406A (en) * 1931-02-20 1932-05-24 Meighan George William Pipe and conduit bender
US2171907A (en) * 1936-08-05 1939-09-05 Imp Brass Mfg Co Tube bender
CH204566A (de) * 1938-08-31 1939-05-15 Vollmerhaus Ewald Kette aus gelenkig miteinander verbundenen Druckstücken an Rohrbiegemaschinen.
US2695538A (en) * 1951-03-19 1954-11-30 Tal Bender Inc Ratchet and pawl actuated lightweight tube benders
US2820504A (en) * 1955-10-21 1958-01-21 Henderson Robert Halsey Pipe or conduit benders

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501545A1 (fr) * 1981-03-16 1982-09-17 Liri Costruzioni Mecc Appareil portatif a cintrer les tuyaux a commande electromecanique
EP0352236A3 (fr) * 1988-07-19 1991-04-10 C.M.L. COSTRUZIONI MECCANICHE LIRI S.r.l. Mini machine portative pour le pliage de tubes à entraínement manuel ou motorisé et comportant un dispositif d'engagement/dégagement automatique
WO2016144168A1 (fr) * 2015-03-10 2016-09-15 Hogerwerf Pieter Arie Dispositif de pliage de tuyau
NL2014431B1 (en) * 2015-03-10 2016-10-13 Arie Hogerwerf Pieter Device for bending pipes.

Also Published As

Publication number Publication date
US4355528A (en) 1982-10-26
JPH0130567B2 (fr) 1989-06-21
DE2904885A1 (de) 1980-08-14
EP0014461B1 (fr) 1983-02-16
JPS55136519A (en) 1980-10-24
ATE2486T1 (de) 1983-03-15
DE2904885C2 (fr) 1992-10-22

Similar Documents

Publication Publication Date Title
EP0014461B1 (fr) Dispositif pour cintrer des tubes métalliques
DE3611253A1 (de) Radialpresse
DE2531857A1 (de) Kupplung fuer optische lichtleitfasern
DE19614656A1 (de) Verfahren zum Erhöhen der Wandungsstärke bei Hohlprofilen
DE3019593C2 (fr)
DE2642743C3 (de) Vorrichtung zum Herstellen einer Kraftfahrzeug-Achse
WO1986001441A1 (fr) Douilles de pression pour tuyaux
DE1940341B2 (de) Verfahren und Einrichtung zum Herstellen von Metalleisten, insbesondere von rohrförmigen Schweißelektroden, aus einem Stabmaterial
DE1900741C3 (de) Vorrichtung zur Formgebung konischer Metallrohre
DE1400942B2 (de) Verfahren zum herstellen einer zugkabelhuelle
DE3226221A1 (de) Formwalzen zur verwendung bei der herstellung von geschweissten rohren
DE2803365A1 (de) Verfahren und vorrichtung zur herstellung von mit querrippen versehenen rohren
DE3512241A1 (de) Radialpresse
DE1806665C3 (de) Verfahren und Vorrichtung zum Befestigen von Muffen aus Metall an gerippten Bewehrungsstäben und nach dem Verfahren hergestellte Stoßverbindung
DE2261575A1 (de) Verfahren und einrichtung zum ausrichten von langgestreckten elementen
DE2536852C2 (de) Vorrichtung zur Herstellung von Rohrbogen mit kleinem Krümmungsradius
CH624319A5 (fr)
DD205830A5 (de) Vorrichtung zum wellen von rohren
DE1934338A1 (de) Vorrichtung zum Einbringen von Nuten in Metallteile
DE2154226C2 (de) Anordnung zur Herstellung von kreisbogenförmig gekrümmten Kokillen für Stranggußmaschinen
DE20220736U1 (de) Spannzange und Distanzelement für Spannzangen
EP0695591B1 (fr) Dispositif pour cintrer des profilés creux à section de profil non-fermé de tous cÔtés
EP0182003A2 (fr) Machine à dresser à rouleaux obliques ayant plus de deux rouleaux à dresser
DE1452443A1 (de) Vorrichtung zur Herstellung von Rohren aus Bandmaterial
DE7903552U1 (de) Biegevorrichtung fuer metallrohre

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19810119

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT NL SE

REF Corresponds to:

Ref document number: 2486

Country of ref document: AT

Date of ref document: 19830315

Kind code of ref document: T

ET Fr: translation filed
ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 80100574.5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19960229

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970127

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970129

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19970203

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19970206

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19970206

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19970212

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19970228

Year of fee payment: 18

EUG Se: european patent has lapsed

Ref document number: 80100574.5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980205

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19980228

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980228

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980228

BERE Be: lapsed

Owner name: ROTHENBERGER G.M.B.H. & CO. WERKZEUGE-MASCHINEN K

Effective date: 19980228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980901

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980205

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19980901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT