EP0120464B1 - Dispositif pour cintrer des tubes - Google Patents

Dispositif pour cintrer des tubes Download PDF

Info

Publication number
EP0120464B1
EP0120464B1 EP84103134A EP84103134A EP0120464B1 EP 0120464 B1 EP0120464 B1 EP 0120464B1 EP 84103134 A EP84103134 A EP 84103134A EP 84103134 A EP84103134 A EP 84103134A EP 0120464 B1 EP0120464 B1 EP 0120464B1
Authority
EP
European Patent Office
Prior art keywords
bending
tube
head
bent
roller
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
Application number
EP84103134A
Other languages
German (de)
English (en)
Other versions
EP0120464A2 (fr
EP0120464A3 (en
Inventor
Emmerich Gerstweiler
Original Assignee
GERSTWEILER EMMERICH FA
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 GERSTWEILER EMMERICH FA filed Critical GERSTWEILER EMMERICH FA
Publication of EP0120464A2 publication Critical patent/EP0120464A2/fr
Publication of EP0120464A3 publication Critical patent/EP0120464A3/de
Application granted granted Critical
Publication of EP0120464B1 publication Critical patent/EP0120464B1/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
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only

Definitions

  • the invention relates to a device for bending pipes, for example metallic brake lines, according to the preamble of claim 1.
  • motor vehicle brake lines are laid as close to the body floor as possible, they often have up to 20 different bends that run on different levels and can also be spatially curved.
  • the raw material is passed through a collet, similar to an automatic lathe, and clamped there for the respective section-wise processing.
  • a bending head is arranged, the intended bending angle of z. B. 70 ° or 90 °, while the collet is rotatable to adjust the bending plane about its longitudinal axis itself.
  • a device of the type mentioned at the beginning of DE-OS 3 152 268 comprises bending units which are adjustably fastened on a main frame in all planes and assigned to the respective bending points.
  • each bending unit comprises a rotatably mounted guide roller and a bending roller which can be pivoted on a crank arm about the axis of the guide roller.
  • additional stops or counterholders are arranged in front of each bending unit, which have to be moved beforehand to clamp the rod to be bent. This requires a considerable amount of device parts, space and also manufacturing time.
  • the invention has for its object to improve a bending device of the type mentioned in such a way that precisely controlled bends can be attached according to direction and angle at precisely predeterminable locations of an output material length and regardless of the number and extent of the bends to be made, the workpiece quickly into the Device inserted and can be removed from the device just as easily.
  • each bending unit between a retracted rest position and a working position lying in the bending plane of the associated bending point along a axis running through the center of bending and perpendicular to the bending plane in a guide frame connected to the main frame, and that Bending head and a bending holder, which is arranged approximately at a distance corresponding to the diameter of the pipe to be bent, are firmly connected to one another and are designed as a receptacle for a pipe section lying in front of the bend to be made.
  • a number of individual bending units corresponding to the number of bending points are set on a main frame, which is approximately adapted to the length and the spatial width of the finished bent workpiece resulting from the bends, so that the bending units each have their own Main axis are aligned perpendicular to the center of the bending point in the respective bending plane.
  • the workflow begins in that a first bending unit grips the workpiece in a suitable position between its ends by advancing it into its working position, which can be kept aligned on one side against an end stop in order to make the first bend.
  • the longitudinal stroke of the bending units between the rest position and the working position not only serves this simplified removal of the workpiece from the device suitable for automatic production, but also the trouble-free sequence of the work sequence of the various bending units and also the multiple adaptability of the device to workpieces with other, possibly more complicated bends without, as in the prior art, stationary bending heads standing in the way of the workpiece to be bent.
  • the bending holder connected to the bending head ensures controlled bending at the intended bending point, without this, as in the prior art, separate or separate. Driven counter holding devices are necessary, which take up the available space in the Vorrich unfavorably narrow. Because of the design of the device proposed according to the invention, bends which are particularly close in succession can also be produced.
  • the upwardly open receptacle for inserting a workpiece, z. B. a straight piece of pipe can be used, which is so and using a one-sided end stop extremely simply positioned so that immediately the first and then all other bends without additional stops, fittings and the like exactly over the desired angle and also at the intended bending point can be carried out.
  • the design according to the invention enables the device, for. B. without making a workpiece model can be introduced with its bending units exactly within a spatial coordinate system for a specific workpiece shape using only at any time and elsewhere on a measuring machine.
  • each bending unit can be biased into its rest position by means of an indirectly acting return spring, from which it can be moved into the working position manually or by an automatic actuating unit until it bears against the pipe to be bent.
  • the bending head can sit at the front end of the holding shaft, on which a sleeve which carries the crank arm with the bending roller is rotatably mounted, but is secured against relative axial displacements and is guided in a longitudinally displaceable and rotatable manner in a bearing device of the guide frame.
  • the optionally adjustable distance between the working and rest positions of the bending unit is sufficient in practical operation to move the workpiece past the subsequent bending unit without hindrance.
  • the sleeve can be secured on the holding shaft between the bending head and a driver fastened on the holding shaft against relative axial movements, while the driver is guided against rotating movements in a longitudinal guide device which is stationary on the guide frame for the purpose of locking the holding shaft. It can be expedient if the sleeve has an outer driver for initiating a rotary movement when driving the crank arm.
  • the sleeve is z. B. detected by a toggle lever including a length-adjustable articulated arm so that the bending angle set on the articulated arm has been passed through by the bending roller after completion of the full toggle lever stroke.
  • a toggle lever including a length-adjustable articulated arm so that the bending angle set on the articulated arm has been passed through by the bending roller after completion of the full toggle lever stroke.
  • pneumatic or hydraulic actuation cylinders can also be used, which act directly on the tubular sleeve or via the toggle lever connection.
  • servomotors can also act on the holding shaft for longitudinal displacement.
  • a plurality of tube sleeves are arranged concentrically one above the other, each of which has a crank arm at the end adjacent to the bending head with a bending roller extending into the bending plane, so that successively opposing tube curvatures of several times up to 180 ° can be produced.
  • the end face of a disk surrounding the bending head can have a reversed course with the desired slope, on which the bending roller holds the pipe during the manufacture of the pipe Bending angle provided at the same time with a bending slope in the manner of a spiral.
  • a base plate which is also part of a z. B. can be assembled from tubular frame parts main frame 10, in the vicinity of the bends to be carried out according to FIG. 1, a holder 12 is fastened with screws 14.
  • the holder 12 has a ball joint receptacle 24 in which the ball head 20 of an intermediate piece 16 is held with suitable clamping means 22.
  • the intermediate piece 16 carries at its other end a ball head 20 which is received and tensioned in a ball joint receptacle 24 of a guide frame 26 of a bending unit after it has been aligned so that its longitudinal axis 70 runs through the center of the relevant bending point and at the same time perpendicularly on the Bending plane 72 stands.
  • a front bearing 28 and a rear bearing 30 are concentrated on the guide frame 26 arranged trically to the longitudinal axis 70.
  • a tube sleeve 34 extends through the bearings 28, 30 and carries a crank arm 36 in the vicinity of its front end, to which a bending roller 40 is fastened on a holding axis 38 at a distance from the longitudinal axis 70.
  • the inner circumference of the tubular sleeve 34 is mounted on a holding shaft 32, the front end of which protrudes from the tubular sleeve 34 carries a bending head 42 and a disk 46 which is firmly connected to it.
  • the circumference of the cylindrical bending head 42, the end face of the disk 46 and the inside of the projecting bending holder 46 form a receptacle 44 in which a tube workpiece 76 is gripped and held when the holding shaft 32 is advanced, whereupon the crank arm 36 rotates with the bending roller 40 and thus the tube, starting from the bending holder 52, is bent to bear against the circumference of the bending head.
  • a driver lug 60 is seated, which rests on the rear end of the tubular sleeve 34, so that when the holding shaft 32 is displaced longitudinally, for. B. with the help of an attacking at its rear end fluid cylinder, the tubular sleeve 34 is taken.
  • a bolt or handle 62 is fastened to the driver projection 60 and protrudes through a longitudinal slot of a longitudinal guide 58, so that the holding shaft is secured against rotation.
  • a driver attachment 64 is also attached to the tube sleeve 34 from which a handle 66 extends in order to rotate the tube sleeve 34 relative to the holding shaft 32 in order to bend the tube 76 via the crank arm 36 and the bending roller 40.
  • the preferably removable and exchangeable bending head 42 is fastened to the front end of the holding shaft 32 by means of a screw 48 which is screwed into an end threaded bore of the holding shaft.
  • the so-called bending holder 52 can, as in the exemplary embodiment shown, start as a projection from a disk which is pushed onto the bending head and connected to it in a rotationally fixed manner by transverse reinforcement or by spline toothing.
  • the bending holder 52 and the circumference of the bending head 42 form a distance which is effective as a receptacle 44 for the pipeline to be bent.
  • the end face of the disk 50 can be designed as a spiral surface 54, whereby the tube received in between when the bending head is advanced with a bending holder lies against the spiral surface 54 when it is pressed by the bending roller (not shown) to the left or right by the circumference of the bending head 42 and up is bent to 180 °.
  • the helical surface 54 could also be progressively expanded in one direction up to an arc angle of approximately 300 ° if it is ensured that the bending roller is only ever moved by the crank arm in one direction of rotation.
  • tubular sleeves can be arranged and supported on the tubular sleeve 34, which may only be accommodated in the front bearing 28 and are each provided with an extension or hand lever on their circumference, while at their front end, similar to the sleeve 34 , carry a bending roller on a crank arm in order to be successively brought into engagement with the pipe to be bent if multiple bends are to be made that are 180 ° apart.
  • the standard version of the bending unit can in principle be the same for all bending stations, so that the bending units can be interchanged on the same main frame.
  • the interchangeability of the bending head 42 with the associated bending holder 52 serves the purpose of also being able to make curvatures with a different radius of curvature.
  • the bending rollers can be replaced by those with a smaller or larger diameter.
  • a guide frame 80 comprises a front section which supports the tubular sleeve 34 in a longitudinal bore in the form of a slide bearing.
  • the guide frame is received and tensioned in a bore of a clamp holder 82, while the clamp holder in turn is fastened to a tube of the main frame by means of a clamping part 84 and clamped to the latter.
  • the crank arm 36 with the bending roller 40 mounted thereon is fastened to the front end of the tubular sleeve 34 in FIG. 4.
  • the holding shaft 32 is rotatably mounted within the tubular sleeve 34, on the front end of which the bending head 42 is fastened with the detachable or integrated bending holder 52. It can be seen that the bending head, the bending roller and the bending holder have tapered or conically tapered end sections which, when the bending unit is pushed forward, can accommodate and record the pipe workpiece to be detected with greater certainty.
  • the rear end of the holding shaft 32 is fixedly connected to a driver projection 60, which acts as an axial limitation for the tubular sleeve 34 and extends with its lower end through a longitudinal slot 58 of a rear extension 86 of the guide frame 80.
  • a fluid cylinder 90 fastened to lugs 88 of the guide frame is connected with its piston rod to the driver lug 60 in order to advance the holding shaft and thus the entire bending unit into the working position when the fluid cylinder is loaded.
  • the movement can be effected by opposing action or by a return spring (not shown), possibly within the fluid cylinder.
  • a yoke part 94 is fastened, which extends over the driver attachment 60 and on which opposite side in extension of the holding shaft 32 carries a shaft section 96 which is coupled via a feather key or a spline toothing 98 and via a sleeve 100 provided on the inside with a complementary toothing to a fluid rotary motor 102 which in turn is fastened to the rear section 86 of the guide frame .
  • the rotary motor 102 consequently provides the rotary movement of the tubular sleeve 34 with the bending roller 40 via the coupling described and the yoke part 94.
  • the longitudinal stroke of the bending units can, if necessary, be limited by stops, not shown. In the majority of all cases occurring, a longitudinal stroke of approx. 100 mm is sufficient, for example, so that after the corresponding retraction movement from the working position, the bent tube workpiece can be removed from the device without problems or can fall downwards or to the side. 4, it is of course also possible in principle to attach further tube sleeves to the tube sleeve 34 and within a then enlarged bore of the guide frame 80, which tube sleeves are provided with additional bending rollers on correspondingly longer crank arms. The rotation of these additional bending rollers can take place manually or can be derived, for example, from the fluid motor 102 by means of a gear redirection.

Claims (11)

1. Dispositif pour le cintrage de tuyaux, par exemple de conduits métalliques pour des freins, comprenant un châssis principal (10) et des unités de cintrage fixées sur celui-ci, réglable dans tous les plans et affectées à chacun des emplacements de cintrage du tuyau, qui comportent chacune une tête de cintrage (42) de forme générale cylindrique ainsi qu'un galet de cintrage (40) reposant sur un bras de manivelle entraîné de façon à pouvoir tourner autour de la tête de cintrage, caractérisé en ce que chaque unité de cintrage peut coulisser entre une position de repos rétractée et une position de travail se trouvant dans le plan de cintrage (72) de l'emplacement de cintrage correspondant, le long d'un axe (70) passant par le centre de cintrage et perpendiculaire au plan de cintrage, dans un châssis de guidage (26) lié au châssis principal (10), et en ce que la tête de cintrage (42) et un appui de cintrage (52) disposé à côté, sensiblement à un écartement correspondant au diamètre du tuyau (76) à courber, sont liés rigidement ensemble et sont conformés comme logement pour recevoir une portion de tuyau (76) située en avant de la courbure à produire.
2. Dispositif selon la revendication 1, caractérisé en ce que chaque unité de cintrage est précontrainte dans sa position de repos au moyen d'un ressort de rappel agissant de façon indirecte, l'unité de cintrage pouvant être déplacée à partir de ladite position de repos jusqu'à s'appliquer contre le tuyau à cintrer de façon manuelle ou au moyen d'un dispositif de mise en place automatique pour venir dans la position de travail.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la tête de cintrage (42) repose à l'extrémité avant d'un arbre d'appui (32), sur lequel, un manchon (34), qui porte l'arbre de manivelle (36) avec le galet de cintrage (40) et qui repose de façon à pouvoir tourner, est guidé de façon à pouvoir coulisser dans le sens longitudinal et à pouvoir tourner, mais en étant bloqué à l'encontre de déplacements axiaux relatifs, dans un dispositif de soutien (28, 30) du châssis de guidage (26).
4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le manchon (34) est maintenu sur l'arbre d'appui (32) entre la tête de cintrage (42) et un entraîneur (60) fixé sur l'arbre d'appui à l'encontre de mouvements axiaux relatifs, et en ce que l'entraîneur est guidé pour permettre l'arrêtage de l'arbre d'appui à l'encontre de mouvements de rotation dans un dispositif de guidage longitudinal (58) monté en un endroit fixe sur le châssis de guidage (26).
5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le manchon (34) comporte un entraîneur extérieur (64) pour induire un mouvement de rotation lors de l'entraînement du bras de manivelle (36).
6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que pour produire plusieurs cintrages alternés du même tuyau dans la direction de la courbure, se succédant étroitement les uns aux autres, un ou plusieurs autres manchons sont montés concentriquement sur le manchon (34), lesdits manchons portant chacun un bras de manivelle avec un galet de cintrage supplémentaire supporté avec un écartement radialement croissant et comportant chacun, à leurs extrémités échelonnées opposées aux bras de manivelle, un entraîneur pour induire la force d'actionnement de rotation pour le galet de cintrage concerné.
7. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il est prévu pour l'entraînement du bras de manivelle (36) des tendeurs à genouillère ou outils de serrage analogues comportant des leviers de tirage de longueur réglable, lesquels peuvent être actionnés contrairement à la force des dispositifs à ressort de rappel, en particulier par des moteurs à fluide.
8. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'en un endroit fixe du châssis de guidage (26) il est disposé un galet d'appui montant dans la zone du plan de cintrage à un écartement tel de la tête de cintrage (52) que dans l'intervalle les galets de cintrage (40) montés sur le bras de manivelle (36) peuvent passer au travers avec le tuyau à cintrer pour imprimer une courbure au tuyau.
9. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'appui de cintrage (52) est formé par une saillie d'un disque (46) entourant la tête de cintrage (42), disque dont la surface frontale avant comporte un tracé en hélice autour de l'axe longitudinal de la tête de cintrage, de sorte que le galet de cintrage (40) pourvoit simultanément le tuyau, pendant la réalisation du cintrage, d'une courbure en montée.
10. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le châssis de guidage (26) de chaque dispositif de cintrage est relié au moyen d'un pied support au châssis principal (10), le pied permettant, grâce à une pièce intermédiaire (16) qui est en particulier remplaçable, une possibilité de réglage du dispositif de cintrage dans toutes les directions et avec un écartement modifiable par rapport au châssis principal.
11. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le châssis principal est constitué par une structure en tube pouvant être prolongée en cas de besoin et en ce que le châssis de guidage (80) du dispositif de cintrage est fixé sur un tube au moyen d'un appui à serrage (82) disposé au voisinage de la tête de cintrage.
EP84103134A 1983-03-22 1984-03-21 Dispositif pour cintrer des tubes Expired EP0120464B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3310282 1983-03-22
DE3310282 1983-03-22

Publications (3)

Publication Number Publication Date
EP0120464A2 EP0120464A2 (fr) 1984-10-03
EP0120464A3 EP0120464A3 (en) 1985-01-16
EP0120464B1 true EP0120464B1 (fr) 1986-07-09

Family

ID=6194244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84103134A Expired EP0120464B1 (fr) 1983-03-22 1984-03-21 Dispositif pour cintrer des tubes

Country Status (2)

Country Link
EP (1) EP0120464B1 (fr)
DE (1) DE3460276D1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126773A (en) * 1964-03-31 taylor
US2366012A (en) * 1942-10-20 1944-12-26 Parnall Aircraft Ltd Appliance for bending tubes, rods, and the like
US2827101A (en) * 1954-10-04 1958-03-18 Northrop Aircraft Inc Pivoted tube bender with tube positioning mark and adjustable tube locating device
DE1527394A1 (de) * 1963-06-14 1969-12-18 Claude Ragache Universalbiegemaschine
NO146420C (no) * 1980-08-26 1983-10-05 Hans Slettvoll Boeyeapparat for manillastenger i alle plan

Also Published As

Publication number Publication date
EP0120464A2 (fr) 1984-10-03
EP0120464A3 (en) 1985-01-16
DE3460276D1 (en) 1986-08-14

Similar Documents

Publication Publication Date Title
EP0079587B1 (fr) Machine à plier des fils
EP0121077B1 (fr) Machine à cintrer des tubes
DE2832980A1 (de) Vorrichtung zum beschicken und entladen einer rohrbiegemaschine
DE1922344B2 (de) Vorrichtung zum Ausrichten und Festklemmen von Rohren oder rohrförmigen Körpern
EP2289643B1 (fr) Dispositif pour le pliage de longues pièces usinées
DE2408741A1 (de) Rohrschneidemaschine
DE2334028C3 (de) Schweißmaschine
DE3016047C2 (fr)
EP0622136B1 (fr) Dispositif pour la fabrication de treillis d'armature pour panneaux en béton
DE2515854B2 (de) Vorrichtung zum Abschneiden und gleichzeitigen Anphasen von Kunststoffrohren
EP0120464B1 (fr) Dispositif pour cintrer des tubes
DE3821362C1 (en) Apparatus for smoothing a mandrel bar
DE2012112C3 (de) Formstückwickelvorrichtung
DE102009024406A1 (de) Rotationsbiegewerkzeug mit Exzenterklemmung
CH670789A5 (fr)
DE3316917C2 (fr)
DE3412494C1 (de) Rohreinschweißvorrichtung
EP0463132A1 (fr) Machine a cintrer pour le cintrage de materiau en forme de barres.
DE102016101908B4 (de) Vorrichtung und Verfahren zum Biegen von Rohren
DE276509C (fr)
DE4230172B4 (de) Verfahren zum Verformen von Rohrstücken und Vorrichtung zur Durchführung des Verfahrens
EP0362698A2 (fr) Machine pour le cintrage automatique de tubes et objets similaires
EP0001240A1 (fr) Machine servant à former des ressorts hélicoidaux
DE2927753A1 (de) Vorrichtung zum beschicken und entladen einer rohrbiegemaschine
DE8308433U1 (de) Rohrbiegevorrichtung

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): CH DE FR GB LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): CH DE FR GB LI

17P Request for examination filed

Effective date: 19850307

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GERSTWEILER, EMMERICH

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GERSTWEILER, EMMERICH

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GERSTWEILER, EMMERICH

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI

REF Corresponds to:

Ref document number: 3460276

Country of ref document: DE

Date of ref document: 19860814

ET Fr: translation filed
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

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910625

Year of fee payment: 8

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

Ref country code: LI

Effective date: 19920331

Ref country code: CH

Effective date: 19920331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: GB

Payment date: 19930308

Year of fee payment: 10

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

Ref country code: FR

Payment date: 19930322

Year of fee payment: 10

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

Ref country code: GB

Effective date: 19940321

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

Effective date: 19940321

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

Ref country code: FR

Effective date: 19941130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: DE

Payment date: 20030425

Year of fee payment: 20