EP1932603A1 - Pipe bending machine for manufacturing meandering pipes and method for manufacturing meandering pipes - Google Patents

Pipe bending machine for manufacturing meandering pipes and method for manufacturing meandering pipes Download PDF

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Publication number
EP1932603A1
EP1932603A1 EP06025676A EP06025676A EP1932603A1 EP 1932603 A1 EP1932603 A1 EP 1932603A1 EP 06025676 A EP06025676 A EP 06025676A EP 06025676 A EP06025676 A EP 06025676A EP 1932603 A1 EP1932603 A1 EP 1932603A1
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EP
European Patent Office
Prior art keywords
bending
pipe
tube
drive train
drive
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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
EP06025676A
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German (de)
French (fr)
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EP1932603B1 (en
Inventor
Peter Reimann
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Peter Reimann
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Priority to EP20060025676 priority Critical patent/EP1932603B1/en
Publication of EP1932603A1 publication Critical patent/EP1932603A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00Bending rods, profiles, or tubes
    • B21D7/02Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/06Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
    • B21D11/07Making serpentine-shaped articles by bending essentially in one plane

Abstract

In a pipe bending machine for meandering pipe courses, at least two tube bending segments (12A, 12B) which are substantially adapted to the tube caliber, which predetermine the bending profiles, are arranged pivotably relative to one another while leaving a bending die (12) free, and optionally pivoted by means of a drive device (14). In order to improve the bending behavior with a comparatively simple construction of the tube bending machine, each tube bending segment is provided with a separate drive train (A and B), wherein in a zero position, the axis of the pivoting wool (14A) of the first drive train (A) coaxial with the bending radius of the second Pipe bending segment (12B) and the pivot shaft (14B) of the second drive train (B) are arranged coaxially to the bending radius of the first pipe bending segment (12A). The coaxiality of the zero position is canceled at each pivoting of the pivot shafts, (14A, 14B) in a bending position for the respective bent tube bending segment (12A, 12B). Such a tube bending machine is very simple and robust in construction and extremely precise and wear-resistant and easy to use.

Description

    TECHNICAL AREA
  • The invention relates to a pipe bending machine for meandering pipe courses, as used for example in the field of solar thermal energy as sun-irradiated, by a fluid to be heated by flowing Rohrmeander. Other applications include underfloor heating, cooling ceilings or heat exchange registers. Such tube bending machines usually have two to the tube caliber, i. the Rohrau ßendurchmesser substantially adapted pipe bending segments, which are free to pivot relative to each other while leaving a bending die and specify the bending profile to be produced.
  • TECHNOLOGICAL BACKGROUND
  • On the market, a generic pipe bending machine is known as in FIG. 7 is shown as prior art. In this known pipe bending machine is driven by a toothed belt, not shown, long-toothed pivot pin used as the drive means 14 ', in which a pneumatically adjustable locking pin 15 'is mounted coaxially displaceable. One with the drive means 14 'rotatably connected pivot shaft 14 A' is designed as a rectangular block and also penetrated by the locking pin 15 '. The pivot shaft 14A 'together with a guide housing 17', a bed, which a lateral, ie transversely oriented to the pivot shaft displacement (double arrow D) 'of the pivot shaft 14A' together with the drive means 14 'with the aid of a guide slot 17C' allows. By the attachment, the rotational drive force (double arrow E ') on the guide housing 17'. transferred, so that the entire guide housing 17 'is pivoted about the respective pivot axis about the respective drive axis. The pivot shaft 14A 'can be locked to a base plate 17A' of the guide housing 17 'by the locking bolt 15' in one or the other sliding position, so that during the bending process no displacement between the guide housing 17 'and the pivot shaft 14A' can take place. Coaxial with the guide bores 17B 'of the base plate 17A' are circular tube bending segments 12A 'and 12B' and their associated retaining pins 16A 'and 16B', respectively, and held relatively loosely in position relative to the guide housing 17 ', this position being maintained by the tapered free end of the guide Arresting pin 15 'is improved in the respective locking position. The tube to be bent is guided by the bending die 12 'between the circumferential half-grooves of the tube bending segments 12A'. Accordingly, in the bending process, the pipe bending segment which is not in the locked position, ie eccentrically to the drive 14 ', pivots about the pipe bending segment coaxially oriented with the drive device 14' and mechanically connected in a straight line.
  • In order to produce a pipe bend with opposite direction of rotation to produce a meandering Rohrmeander, the above lock is released and the entire drive 14 'with its pivot shaft 14A' transversely with respect to the guide housing 17 'and locked again in the second, now coaxial with the other Rohrbiegesegment working position , - This known pipe bending machine is correspondingly expensive to handle and because of the necessary sliding game not too precise and less robust as would be desirable.
  • PRESENTATION OF THE INVENTION
  • The invention has for its object to improve the bending behavior in a relatively simple construction of a generic pipe bending machine. In particular, it is desirable to achieve greater dimensional accuracy and less susceptibility of the tube bending machine. This object is achieved by a tube bending machine having the features of claim 1 or 2 and by a method having the features of claim 10. Accordingly, it is provided in terms of the tube bending machine in the core that the pivot axes of the drive means each Rohrbiegesegmentes are arranged in the zero position coaxial with the bending radius of the other Rohrbiegesegmehtes and the coaxiality is left during each bending cut. In this way, it is possible that the tube bending machine endlessly supplied, in itself straight tube feed strand is bendable once in a right bend and once in a left turn around the desired angle. This angle is usually 180 °, so that the highest possible pipe density per clamped pipe surface is achieved. Accordingly, the driven pivot axes of the two tube bending segments rotate in opposite directions during tube bending, wherein the one tube bending segment is in each case in its stationary to the drive shaft of the pivoting tube bending segment in a stationary, coaxial idle state. After each bending step, the previously pivoted tube bending segment is pivoted back to its zero position, the tube register preferably not displaced. In this way, after this pivoting back a predeterminable length of the tube through the bending die are pushed straight through until the straight part of the register length is fed along with an arc length. Only then does a new pipe bending step begin in the opposite direction to the first bending direction of the second bending direction. During each bending step, the straight feed piece of the not yet bent tube is held in position. This has the consequence that the beginning of the pipe register to be bent or the entire already bent pipe register is pivoted about the bending angle on its sub. The latter is in use and can be facilitated by a swivel table.
  • In order to easily connect each tube bending segment with its associated rotary actuator, a coaxial with him holding pin is provided on the drive side for each tube bending segment. In order to improve the dimensional accuracy of the pipe register to be bent, the pipe holding pins of both pipe bending segments are connected by a respective pivotally connected to the pipe holding pin spacer element.
  • If the first drive device has a rigid first pivot arm between its pivot shaft and the retaining pin of the first pipe bending element, an optimum pivoting force transmission is thereby achieved.
  • If the second drive device has a rigid second pivot arm between its pivot shaft and the retaining pin of the second pipe bending element, which is rigidly connected to the pivot shaft of the second drive device, in particular by means of a clogging element, this results in a low-loss pivoting force transmission.
  • If the second pivot arm has a recess for pivoting in and out of the first holding pin of the first pipe bending element, then a very small, extremely stable pipe bending head can be realized thereby.
  • A further Maßhaltigkeitsverbesserung the pipe bending is achieved in that the pivot shafts of both pipe bending elements are pivotally mounted in a shaft holding body. This may include a distance variability of the two drive shafts
  • The same applies if the first pivot arm has a recess for pivoting in and out of the Verkopfungselementes the second drive means.
  • To simplify the tool change, the, z. B. when wearing the pipe bending elements or when changing to other pipe diameter or bending radii to be bent is required to simplify, consisting of two coupling points separation point between the pivot shafts, preferably the shaft holding body and the Schwenkkarmen provided.
  • A pipe straight holder allows a targeted feeding of the pipe feed strand to the bending die.
  • A distance adjuster for the pivot shafts allows a centering of the bending die on the exit point of the pipe straight holder and thus a Rohrbiegequalität improving adjustment.
  • With regard to a method for producing meandering pipe runs, the object with the features of claim 10 is achieved. Accordingly, it is provided to pivot the two pipe bending segments starting from a pipe feed aligned to the zero position alternately to the other pipe bending segment under bending of the pipe and after pivoting back (in Leerweg) of the initially bent under bending pipe bending segment the pipe on the pipe feed for the Next advance bending step sufficiently far and then to pivot the other pipe bending segment to the one pipe bending segment with simultaneous pipe bending back and then zurückzuschwenken back in the free path and to repeat this process for the production of further Rohrmeander.
  • The above-mentioned and the claimed components to be used according to the invention described in the exemplary embodiments are not subject to special conditions of size, shape, material selection and technical design, so that the selection criteria known in the field of application can be used without restriction.
  • Further details, features and advantages of the subject matter of the invention will become apparent from the dependent claims, as well as from the following description of the accompanying drawings and table, in which - by way of example - an embodiment of a pipe bending machine is shown.
  • In the drawing show
  • Fig. 1
    a pipe bending machine in bottom view in zero position before bending;
    Fig. 2
    the same tube bending machine in a bending position after completion of a right bend;
    Fig. 3
    the same tube bending machine in a second bending position after completion of a left bend;
    Fig. 4
    the same pipe bending machine in a perspective view from below;
    Fig. 5
    the same pipe bending machine in side view;
    Fig. 6
    a schematic diagram of the pipe bending machine as well
    Fig. 7
    a pipe bending machine according to the prior art.
  • All the essential elements of the tube bending machine are based on the schematic diagram of the FIG. 6 out. Thereafter, there is a possibly two-engine actuated drive means 14 of two drive trains (strand A and strand B). A first pivot shaft 14A, which is rotatable via the drive in an angle range between usually 0 ° and approximately 270 ° in both directions of rotation, is rotatably mounted in a shaft holding body 26 - as well as the drive train B, the pivot shaft 14B. Spacers 26A, 26B allow the lateral spacing of the parallel aligned ones To change the pivot shafts 14A / 14B, be it for adjustment or for bending radius adjustment.
  • On the opposite side of the shaft holding body 26 of the drive device 14, each drive train at a coupling point 24A and 24B is separable, so that the entire underlying bending head of the pipe bending machine can be replaced with another. This is required if the tube bending radii are to change.
  • The pivot shaft 14A is closed, e.g. As shown approximately at right angles to a pivot arm 20A, the rotatable with the pivot shaft 14A, if necessary, separable as an interface, connected and a recess 25A ', to release movement space for the yet to be explained Verkröpfungselement 22. At the free end of the pivot arm 20A is connected approximately at right angles and rotatably connected to the pivot arm 20A, a retaining pin 16A, which penetrates a spacer 18 in rotatable form and carries at its free end a first tube bending segment 12A. Likewise, the retaining pin 16A may be rotatably attached to the free end of the pivot arm 20A and the retaining pin 16A rotatably or rotatably support the first tube bending segment 12A at its free end. The first (and also the second) tube bending segment 12A, 12B consist in the illustrated embodiment of a circular disc, each with a radially outer circumferential groove whose cross section corresponds in a known manner to be bent tube half diameter approximately.
  • Similarly, the second drive train B is constructed, wherein the crank shaft 14B first an offset 22 connects and leave the recess 20B 'of the subsequent pivot arm 20B space for the movement of the holding pin 16A of the drive train A.
  • The pivot shaft 14A of the drive train A and the retaining pin 16B of the drive train B are in the in Fig. 1 shown zero position of the pipe bending machine coaxial arranged. The same applies to the pivot shaft 14B of the drive train B and the holding pin 16A of the drive train A.
  • The operation is the following:
  • If an initially straight pipe section pushed forward by the bending die 12 sufficiently far to be bent to a left-hand arc seen from above, the drive train B becomes active, wherein the drive device 14 rotates the pivot shaft 14B by, for example, 180 °. In this case, the Verkröpfungselement 22 moves into the recess 20A 'and the retaining pin 16B pivots the spacer member 18 together with the Rohrbiegesegmentes 12B in the counterclockwise direction by 180 ° around the Rohrbiegesegment 12A around and thus generates a 180 ° bend of the tube. Subsequently, the strand B pivots back by the same angle until the tube bending segment 12B has returned to its illustrated zero position when viewed from above. Thereafter, the tube to be bent can be further advanced through the bending die 12. This usually happens without rotation about the tube axis, but in principle can also be done with rotation about the tube axis. After the fed still straight tube is sufficiently advanced, a further bending operation, in particular a left bend can be performed. For this purpose, the drive device 14 pivots the pivot shaft 14A by a predetermined angle of, for example, 180 ° in the clockwise direction seen from above. As a result, the retaining pin 16A pivots the spacer element 18 together with the tube bending segment 12B around the second tube bending segment 12B. The thus again bending pipe end accomplishes this pivoting. Following this second bending step, the drive train A travels in the free travel again by the bending angle in its zero position shown in the drawing. This completes a complete double bend cycle to produce a meander. This can be followed by further bending cycles in any way.
  • The FIGS. 1 to 5 illustrate the in FIG. 6 illustrated device in a practical embodiment.
  • FIG. 1 illustrates the state of the pipe bending machine before the start of manufacturing a pipe mandrel 10 (see FIG. Fig. 3 ), wherein the bendable, in the direction of arrow C by a Rohrgeradehalter 28 displaceable tube is advanced as required by the bending die 12.
  • Out FIG. 2 It can be seen how the tube bending segment 12B, starting from the in FIG. 1 shown zero position, in a bent by 180 ° bending position (in the drawing in the clockwise direction) is pivoted about the remaining in position other tube bending segment 12A and thus bent the tube to be bent around the tube bending segment 12A according to the predetermined bending contour by 180 ° ,
  • After the in FIG. 2 shown bending process in a clockwise direction, the tube bending segment 12B first in Lehrweg in the FIG. 1 corresponding zero position pivoted back. In this zero position, the tube to be bent can be further advanced by the Rohgeradehalter 28, wherein the 180 ° degree bow already produced is moved with. Then, a bending step in the counterclockwise direction, which in the in FIG. 3 shown pivot position of the pipe bending segment 12A has already been completed. From this working position, the tube bending segment 12A will follow the teaching path again corresponding to double arrow G in the zero position accordingly FIG. 1 swiveled back. This is a complete meander made and more meander can connect in the same way.
  • Out FIG. 4 It is particularly clear how the two drive units 14 of the drive train A and B with respect to the shaft holding body 26 centered by Abstandversteller 26 A, 26 B with respect to the pipe straight holder 28 and can be adjusted in terms of spacing to produce larger or smaller Rohrbieger segments with other Rohrbiegesegmenten.
  • Out Figures 5 and 6 shows, inter alia, how a tool change can take place at the coupling points 24A, 24B. Here, the pivot arms 20A, 20B of the pivot shafts 14A, 14B of the two drive trains A and B are separated.
  • While in the drawings of circular tube bending segments is assumed, the bending shape and tube bending radius are arranged in the zero position coaxial with the pivot shaft of the other drive train, the invention basically also allows to realize Rohriegesegmente with other bending shapes and other arrangement of the axis of Rohrbiegradius, when the two drive trains A, B are realized according to the features of claim 2.
  • LIST OF REFERENCE NUMBERS
  • 10
    Rohrmeander
    10A
    bending profile
    10B
    bending profile
    12
    bending die
    12 '
    Biegmatrize
    12A
    Pipe bending segment
    12A '
    Pipe bending segment
    12B
    Pipe bending segment
    12B '
    Pipe bending segment
    14
    driving means
    14 '
    driving means
    14A
    pivot shaft
    14A '
    pivot shaft
    14B
    pivot shaft
    15 '
    locking pin
    16A
    retaining pins
    16A '
    retaining pins
    16B
    retaining pins
    16B '
    retaining pins
    17 '
    guide housing
    17A '
    baseplate
    17B '
    guide bores
    17C '
    guide link
    18
    Spacer element
    20A
    swivel arm
    20A '
    recess
    20B
    swivel arm
    20B '
    recess
    22
    Verkröpfungselemerit
    24A
    coupling site
    24B
    coupling site
    26
    Shaft holding body
    26A
    distance adjuster
    26B
    distance adjuster
    28
    Pipe Corset
    A
    powertrain
    B
    powertrain
    C
    arrow
    D '
    Double arrow (shift)
    e '
    Double arrow (rotation)
    F
    Double arrow (swiveling)
    G
    Double arrow (swiveling)
    RA
    Bending radius.
    RB
    bending radius

Claims (10)

  1. Pipe bending machine for meandering pipe runs (10) having at least two tube bending segments (12A, 12B) which are substantially adapted to the tube caliber and allow a bending die (12) to be pivoted relative to one another, which predetermines the bending profile (10A, 10B) and a drive device (14). for separate pivoting of both tube bending segments,
    characterized,
    in that each tube bending segment (12A, 12B) is provided with a separate drive train (A) and (B),
    that in a zero position, the axis of the pivot shaft (14A) of the first drive train (A) coaxial with the bending radius (RB) of the second bending segment (12B) and the pivot shaft (14B) of the second drive train (B) coaxial with the bending radius (RA) of first pipe bending segment (12A) are arranged and
    that the coaxiality of the zero position at each pivoting of one of the pivot shafts (14A, 14B) is canceled in a bending position of the respective pivoted Rohrbiegesegmentes.
  2. Pipe bending machine according to the preamble of claim 1, in particular claim 1, characterized
    that each tube bending segment (12A, 12B) is provided with a separate drive train (A) and (B), and
    that the first drive train (A) between its pivot shaft (14A) and a retaining pin (16A) of the first pipe bending element (12A) has a first Swing arm (20A) and the second drive train (B) between its pivot shaft (14B) and a retaining pin (16B) of the second Rohrbiegesegmentes (12B) via a crank member (22) with the second pivot shaft (14B) of the second drive train (B) second pivot arm (20B).
  3. Pipe bending machine according to claim 2, characterized in that the second pivot arm (20B) has a recess (20B ') for pivoting in and out of the first retaining pin (16A) of the first drive train (A)
  4. Pipe bending machine according to claim 2 or 3, characterized in that the first pivot arm (20A) has a recess (20A ') for pivoting in and out of the Verkröpfungselementes (22) of the second drive means.
  5. Pipe bending machine according to one of claims 1 to 4, characterized in that each drive train (A; B) has a coupling point (24A; 24B) for tool change.
  6. Pipe bending machine according to one of claims 1 to 8, characterized by a shaft holding body (26) for spaced holding the pivot shafts (14A, 14B) of the drive means (14).
  7. Pipe bending machine according to one of claims 1 to 6, characterized by a spacer element (18) connecting the retaining pins (16A; 16B) of the two pipe bending segments (12A; 12B).
  8. Pipe bending machine according to one of claims 1 to 9, characterized by a pipe straight holder (28) for feeding a still unbent pipe string into the bending die (12) of the tube bending segments (12A, 12B) in their zero position.
  9. Pipe bending machine according to one of claims 1 to 10, characterized by a distance adjuster (26A); 26B) for the drive shafts (14A; 148).
  10. DB = EPODOC & ... PN = EP0284301 A method of producing circumferential pipe runs with at least two tube bending segments (12A, 12B) which are substantially adapted to the tube caliber and which are capable of pivoting reactively with respect to one another, leaving the bending profile (10A, 10B) free, and with a drive device (14) for the separate pivoting of the tube bending segments, both tube bending segments,
    characterized in that
    each Rohrbiegesegment is selectively pivoted by a separate drive train, wherein a present in a zero position coaxiality between the pivot shafts of the drive trains is repealed with the bending radius of the pipe bending segment of the other drive train for each pivoted Rohrbiegesegment in the bending positions, and wherein the one or the other pipe bending segment, starting from the aligned to a pipe feeding zero position, mutually pivoted by the associated drive train to the other pipe bending segment bending the pipe and after pivoting back (in the free path) of the initially bent under bending a Rohrbiegesegments the pipe over the pipe feeding point for the next bending step advanced far enough and subsequently the other pipe bending segment is pivoted by its associated drive trains to a pipe bending segment with simultaneous tube bending and is then swung back again (in Leerweg) and these steps for making further pipe mandrels are repeated if necessary.
EP20060025676 2006-12-12 2006-12-12 Pipe bending machine for manufacturing meandering pipes and method for manufacturing meandering pipes Active EP1932603B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20060025676 EP1932603B1 (en) 2006-12-12 2006-12-12 Pipe bending machine for manufacturing meandering pipes and method for manufacturing meandering pipes

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20060025676 EP1932603B1 (en) 2006-12-12 2006-12-12 Pipe bending machine for manufacturing meandering pipes and method for manufacturing meandering pipes
DE200650002973 DE502006002973D1 (en) 2006-12-12 2006-12-12 Pipe bending machine for the production of meandering pipe runs and method for producing meandering pipe runs
AT06025676T AT423639T (en) 2006-12-12 2006-12-12 Pipe bending machine for making mandating pipe runs and method for producing merchanting pipe running

Publications (2)

Publication Number Publication Date
EP1932603A1 true EP1932603A1 (en) 2008-06-18
EP1932603B1 EP1932603B1 (en) 2009-02-25

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EP20060025676 Active EP1932603B1 (en) 2006-12-12 2006-12-12 Pipe bending machine for manufacturing meandering pipes and method for manufacturing meandering pipes

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EP (1) EP1932603B1 (en)
AT (1) AT423639T (en)
DE (1) DE502006002973D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130025339A1 (en) * 2011-07-26 2013-01-31 Medtronic Vascular, Inc. Apparatus and Method for Forming a Wave Form for a Stent from a Wire
DE102012019183A1 (en) * 2012-09-28 2014-04-03 Ulrich Zimmer Device for bending pipe material, particularly brake lines or fuel lines, has hinge bending head pivotally mounted at bending tower and intermediate gear mounted on pivotal receiving lever of hinge bending head

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2125193A1 (en) * 1971-02-18 1972-09-29 Gol Sp Kon Coiled tube mfr - by a high-performance machine employing two drive shafts
JPS4893571A (en) * 1972-03-11 1973-12-04
DE2236898A1 (en) 1972-07-27 1974-02-07 Stiebel Eltron Gmbh & Co Kg Bending tubes for heat exchangers - using machine with two grooved bending rolls side by side
DE2918813A1 (en) * 1979-05-10 1980-11-20 Brueninghaus Gmbh Stahlwerke Bending machine for metal bars or tubes - has horizontally movable pillars supporting respective anvils on which workpiece is bent via rollers on lever arms
JPS6160218A (en) * 1984-08-30 1986-03-27 Sanden Corp Apparatus for producing zigzag pipe
FR2685228A1 (en) * 1991-12-23 1993-06-25 Automation Franc Machine for bending a rod-, bar-, tube-, wire- or similar-type element

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2125193A1 (en) * 1971-02-18 1972-09-29 Gol Sp Kon Coiled tube mfr - by a high-performance machine employing two drive shafts
JPS4893571A (en) * 1972-03-11 1973-12-04
DE2236898A1 (en) 1972-07-27 1974-02-07 Stiebel Eltron Gmbh & Co Kg Bending tubes for heat exchangers - using machine with two grooved bending rolls side by side
DE2918813A1 (en) * 1979-05-10 1980-11-20 Brueninghaus Gmbh Stahlwerke Bending machine for metal bars or tubes - has horizontally movable pillars supporting respective anvils on which workpiece is bent via rollers on lever arms
JPS6160218A (en) * 1984-08-30 1986-03-27 Sanden Corp Apparatus for producing zigzag pipe
FR2685228A1 (en) * 1991-12-23 1993-06-25 Automation Franc Machine for bending a rod-, bar-, tube-, wire- or similar-type element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130025339A1 (en) * 2011-07-26 2013-01-31 Medtronic Vascular, Inc. Apparatus and Method for Forming a Wave Form for a Stent from a Wire
US9296034B2 (en) * 2011-07-26 2016-03-29 Medtronic Vascular, Inc. Apparatus and method for forming a wave form for a stent from a wire
US10518315B2 (en) 2011-07-26 2019-12-31 Medtronic Vascular, Inc. Apparatus and method for forming a wave form for a stent from a wire
DE102012019183A1 (en) * 2012-09-28 2014-04-03 Ulrich Zimmer Device for bending pipe material, particularly brake lines or fuel lines, has hinge bending head pivotally mounted at bending tower and intermediate gear mounted on pivotal receiving lever of hinge bending head

Also Published As

Publication number Publication date
AT423639T (en) 2009-03-15
DE502006002973D1 (en) 2009-04-09
EP1932603B1 (en) 2009-02-25

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