EP0025002B1 - Apparatus for bending tubes in crank or s shape - Google Patents

Apparatus for bending tubes in crank or s shape Download PDF

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Publication number
EP0025002B1
EP0025002B1 EP80420102A EP80420102A EP0025002B1 EP 0025002 B1 EP0025002 B1 EP 0025002B1 EP 80420102 A EP80420102 A EP 80420102A EP 80420102 A EP80420102 A EP 80420102A EP 0025002 B1 EP0025002 B1 EP 0025002B1
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EP
European Patent Office
Prior art keywords
counter
forms
tube
framework
abutment
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EP80420102A
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German (de)
French (fr)
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EP0025002A1 (en
Inventor
Michel Plattard
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UNICUM SA
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UNICUM SA
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Priority to AT80420102T priority Critical patent/ATE3819T1/en
Publication of EP0025002A1 publication Critical patent/EP0025002A1/en
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Publication of EP0025002B1 publication Critical patent/EP0025002B1/en
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    • 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

Definitions

  • the invention relates to an apparatus for bending tubes in the shape of a gendarme's cap or in esse of the type comprising a form of movable stamping between two counter-forms held on a frame with rollers for supporting the free parts of the tube to be bent mounted on a sliding support with respect to said frame with axial operating means, the lateral counter-forms mounted on the same frame receiving the push rod of the shape and the means for controlling its movement, cooperate tangentially along the support points of the tube before bending it with back-up rollers.
  • an interchangeable form of bending acts perpendicularly in thrust on the tube held on the opposite side and symmetrically by lateral counter-forms, while rollers spaced, mobile or fixed, widely disposed outside said counter-forms, serve only as support or external stop on each side, to the free rectilinear part of the tube, during the forming operation.
  • the object of the present invention is to remedy these drawbacks.
  • the invention solves the problem by providing that the support rollers are mounted on a support to tighten the tube and in that the shape is made movable independently of the support rollers. to ensure during the bending work by partial winding of the tube parts on the counterforms, a guiding, sliding and rolling effect during the whole operation, so as to allow, without any deformation, the work of thin tubes and making strictly parallel branches.
  • the apparatus for bending the tubes in the shape of a gendarme's hat or in esse essentially comprises a frame 1 in the form of a tray, with at the rear, a square and reinforced end 1 1 drilled axially in 1 2 for the free sliding engagement of the graduated cylindrical part 2 1 of an adjustable stop 2 ending on the outside by a support flange 2 2 .
  • a threaded push rod 3 is screwed axially into the interior of the stop 2 and is at the end, above the frame 1, with one end forming a flat surface 3 1 provided with a groove 3 2 to allow the engagement of the axial opening 4 1 of an interchangeable shape or hanger, substantially semicircular, maintained in the longitudinal position by a pin 5 being housed in the groove 3 2 .
  • Each shape 4 with peripherally a semicircular groove 4 2 corresponding to the outside diameter of the tube “T” to be bent, is also established with a radius R which is standardized.
  • the push rod 3 forms a push head 3 3 of a machine which makes it possible to exert pressure such as a jack, or possibly a lever key with manual control.
  • the frame 1 also forms at the front, a T-profile whose branches are pierced in thickness, with holes 1 3 , 1 4 , 1 5 arranged symmetrically with respect to the axis of the push rod 3, but offset as much longitudinally than transversely.
  • the holes 1 3 , 1 4 , 1 5 allow symmetrically in pairs, fixing by screwing or otherwise, a locking screw 6 intended to hold in position an axis 7 whose cylindrical outer surface allows centering with free rotation, circular counter-forms 8 or in sectors, peripherally provided with semicircular grooves 8 1 corresponding to the external diameter of the tube T to bend.
  • Each interchangeable counter-shape 8 of variable diameter depending on the value of the radius of the hanger to be obtained can also be mounted by its screw 6, symmetrically and asymmetrically on the holes 1 3 , 1 4 or 1 5 of the branches of the frame 1, given its outside diameter and its more or less close positioning relative to the axis of the form 4, for the sole purpose of obtaining gendarme hats with variable spacing and with equal or unequal branches.
  • the frame 1 forms by its parallel lateral faces 1 7 , a guide slide of the corresponding U-shaped section of a sliding support 9 in the form of plates, applying below said frame 1.
  • the latter constitutes symmetrically at right of the faces 1 7 and on each side, a square section at a right angle with horizontal side 9 1 disposed substantially in the same plane as the upper face of the frame 1, and vertical side 9 2 forming at its base and internally, a notch 9 3 constituting the upper U-shaped guide section.
  • the support 9 is established with an axial and profiled branch 9 4 which projects beyond the front face of the frame 1 and constitutes at the end a squared boss 9 5 in which an operating screw 10 is axially screwed provided externally with a handwheel 11.
  • the screw 10 constitutes a shouldered seat 10 1 provided with a circular groove 10 2 so as to engage in the corresponding opening 1 8 with an axial boss 1 9 formed at the end of the frame 1.
  • a pin 12 engaging in the groove 10 2 ensures the coupling in translation, screw 10 and frame 1.
  • each squared section of the sliding support 9 authorizes the seat of a roller 13 in the form of a rectangular block such as a square section, each face of which has a substantially semi-circular recess 13 1 , calibrated according to the outside diameters of the usual tubes used.
  • Each roller 13 is also drilled asymmetrically and in thickness, in. 13 2 , in two perpendicular directions, to allow with play and in two positions, its engagement on a positioning rod 14 fixed vertically on the horizontal side 9 1 of the squared section.
  • each roller 13 is present tangentially and perpendicularly opposite the corresponding counterform 8, whatever its positioning, with a possibility of spacing or reconciliation, by acting on the handwheel 11 which controls the movement axial of the sliding support 9 relative to the frame 1.
  • the tube T engaged in the grooves 8 1 of the two counterforms 8 is thus clamped and rigorously held in position, as a result of the approximation and the support of the rollers 13 which apply rigorously during the clamping, on the vertical faces, which can be inclined between them, of squared sections, thereby forming a counter-support of the tube T, so as to allow the rigorous positioning of the two grooves 8 1 and 13 1 .
  • the roller 13 may possibly have a slight displacement in height during tightening.
  • the push rod 3 and the operating screw 10 are in alignment, along the same axis, to ensure perfect balance during the bending operation, and equal tightening of the tube T at the level of the rollers 13 relative to the counter-forms 8.
  • the sliding support 9 is removed and only the frame 1, equipped with the push rod 3 provided with the form 4 and the corresponding counter-forms 8, is used.
  • Le.tube T is placed on the two counter-forms 8 placed symmetrically or not, and the form 4 exerts in the known manner, an axial or asymmetrical support according to arrow F, for obtaining a bend T 1 with adjacent branches V-shaped
  • the counterform 8 arranged on the side of the longitudinal light 1 6 of the frame is fixed by its locking screw 6 and its axis 7, in said lumen 1 6 according to a spacing with respect to the other counterform corresponding to the dimension X, the displacement and adjustment being effected either by the graduations or by measure.
  • the corresponding branch of the frame 1 can alternatively form an opening 10 1 in the shape of a T, allowing the displacement of the locking screw 6 in two directions perpendicular to the other counterform.
  • the tube T is placed in abutment on the recesses 13 1 of the rollers 13, then clamped opposite the non-offset counterform 8, by means of the operating handwheel 11, as illustrated in FIG. 7.
  • the form 4 is then brought directly into contact with the tube T, by simple sliding of the push rod 3, while the adjustable stop 2 is adjusted longitudinally in position, by screwing or unscrewing on said push rod 3, so as to present the number of its graduation 2 3 corresponding to the dimension X, in relation to the face outside of the squared part 1 1 of the frame 1.
  • the device allows the production of a gendarme hat with equal or unequal branches, from a tube T.
  • the symmetrical spacing E of the counterforms 8 is adjusted taking into account their diameter and the opening of the gendarme hat to be obtained.
  • the rectilinear tube T is then put in place on the grooves 8 1 of the counterforms 8, then clamped by the operating handwheel 11 which moves the sliding support 9 in order to support the rollers 13.
  • the shape 4 is as before , brought tangentially into contact on said tube T, while the adjustable stop 2 is moved relative to the push rod 3, to ensure the positioning of the figure of its graduation corresponding to the dimension X of displacement of the form 4 to the stop position of the support flange 2 2 .
  • the counter-forms 8 of identical or different radii are offset with respect to the axis of the form 4, so as to obtain two unequal spacings D and D1.
  • the rollers 13 or the roller 13 corresponding to the most distant or larger counter-shape 8 can be positioned differently on rod towers 14, by turning 180 degrees, relative to their holes 13 2 , so as to allow rigorously, the tangential support and the tightening of the branches of the tube T, with respect to said counter-forms.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Air Bags (AREA)
  • Paper (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

1. Apparatus for bending the tubes (T), in the form of a gendarme hat or of an ess, of the type comprising a mobile stamping form (4) between two counter-forms (8) maintained on a framework (1) with counter-abutment rollers (13) of the free portions of the tube (T) to be bent, mounted on a support which is sliding relative to said framework (1) with axial handling means, the lateral counter-forms (8) mounted on the same framework (1) receiving the push rod of the form (4) and the control means for the shifting thereof, and co-operating tangentially along the supporting points of the tube (T), prior to the bending thereof, with counter-abutment rollers (13), characterized in that these counter-abutment rollers (13) are mounted on a support (9) to provide a clamping of the tube (T) and that the form (4) is made mobile independently of the counter-abutment rollers (13) in order to provide during the bending process by partial of the portions of the tube (T) on the counter-forms (8) a guiding, sliding and rolling effect for the whole time of the operation, so as to make possible without any distortion the machining of thin tubes and the production of branch pipes which are substantially parallel.

Description

L'invention concerne un appareil à cintrer les tubes en forme de chapeau de gendarme ou en esse du type comportant une forme d'emboutissage mobile entre deux contre-formes maintenues sur un bâti avec galets de contre-appui des parties libres du tube à cintrer monté sur un support coulissant par rapport audit bâti avec moyen axial de manoeuvre, les contre-formes latérales montées sur un même bâti recevant la tige de poussée de la forme et le moyen de contrôle de son déplacement, coopèrent tangentiellement suivant les points d'appui du tube avant son cintrage avec des galets de contre-appui.The invention relates to an apparatus for bending tubes in the shape of a gendarme's cap or in esse of the type comprising a form of movable stamping between two counter-forms held on a frame with rollers for supporting the free parts of the tube to be bent mounted on a sliding support with respect to said frame with axial operating means, the lateral counter-forms mounted on the same frame receiving the push rod of the shape and the means for controlling its movement, cooperate tangentially along the support points of the tube before bending it with back-up rollers.

Dans les appareils à cintrer les tubes connus de ce genre (FR-A-1 572 453), une forme de cintrage interchangeable agit perpendiculairement en poussée sur le tube maintenu du côté opposé et symétriquement par des contre-formes latérales, tandis que des galets espacés, mobiles ou fixes, largement disposés en dehors desdites contre-formes, servent uniquement d'appui ou de butée extérieure de chaque côté, à la partie rectiligne libre du tube, lors de l'opération de formage.In apparatuses for bending known tubes of this kind (FR-A-1 572 453), an interchangeable form of bending acts perpendicularly in thrust on the tube held on the opposite side and symmetrically by lateral counter-forms, while rollers spaced, mobile or fixed, widely disposed outside said counter-forms, serve only as support or external stop on each side, to the free rectilinear part of the tube, during the forming operation.

Avec un tel appareil, le cintrage des tubes épais s'effectue dans de bonne conditions, mais contrairement, le cintrage de tubes minces est défectueux par suite du non-maintien dudit tube au droit des contre-formes, ce qui entraîne des déchirures et des écrasements. D'autre part, après formation du chapeau de gendarme ou de l'esse, les branches rectilignes ne sont plus parallèles.With such an apparatus, the bending of thick tubes is carried out in good conditions, but unlike, the bending of thin tubes is defective as a result of the non-maintenance of said tube in line with the counter-forms, which leads to tears and crushes. On the other hand, after forming the gendarme hat or the esse, the straight branches are no longer parallel.

La présente invention a pour but de remédier à ces inconvénients. Telle que caractérisée dans la revendication 1, l'invention résoud le problème en prévoyant que les galets de contre-appui sont montés sur un support pour effectuer un serrage du tube et en ce que la forme est rendue mobile indépendamment des galets de contre-appui pour assurer lors du travail de cintrage par enroulement partiel des parties de tube sur les contre-formes, un effet de guidage, de glissement et de laminage pendant toute l'opération, de manière à permettre sans aucune déformation, le travail de tubes minces et la réalisation de branches rigoureusement parallèles.The object of the present invention is to remedy these drawbacks. As characterized in claim 1, the invention solves the problem by providing that the support rollers are mounted on a support to tighten the tube and in that the shape is made movable independently of the support rollers. to ensure during the bending work by partial winding of the tube parts on the counterforms, a guiding, sliding and rolling effect during the whole operation, so as to allow, without any deformation, the work of thin tubes and making strictly parallel branches.

- Les avantages obtenus grâce à cette invention, consistent essentiellement en ce qu'elle autorise le cintrage parfait, principalement de tubes minces avec des branches rigoureusement parallèles.- The advantages obtained thanks to this invention consist essentially in that it allows perfect bending, mainly of thin tubes with strictly parallel branches.

L'invention est exposée ci-après plus en détail, à l'aide de dessins représentant seulement un mode d'exécution.

  • La figure 1 représente en perspective, les éléments séparés de l'appareil à cintrer les tubes, conformément à la présente invention, et disposés par ordre de montage ;
  • La figure 2 représente une vue extérieure en plan de l'appareil en fin d'opération de cintrage d'un tube en forme de chapeau de gendarme à branches égales ;
  • La figure 3 représente une vue de face et en coupe suivant la ligne 3-3 de la figure 2 ;
  • La figure 4 représente une vue de face et en coupe suivant la ligne 4-4 de la figure 2 ;
  • La figure 5 représente une vue partielle en perspective du bâti, illustrant la disposition d'ouvertures graduées oblongues et équerrées en forme de té, en vue du montage réglable d'au moins une contre-forme ;
  • La figure 6 représente une vue en plan, illustrant schématiquement la formation d'un cintrage simple avec l'appareil selon l'invention ;
  • Les figures 7 et 8 représentent des vues en plan illustrant schématiquement la formation d'un cintrage en forme d'esse avec l'appareil selon l'invention ;
  • Les figures 9, 10 et 11 représentent des vues en plan illustrant schématiquement la formation d'un cintrage en forme de chapeau de gendarme à branches égales, avec l'appareil selon l'invention ;
  • La figure 12 représente une vue en plan semblable à la figure 11, illustrant schématiquement la formation d'un cintrage en forme de chapeau de gendarme à branches inégales, avec l'appareil selon l'invention ;
The invention is set out below in more detail, with the aid of drawings representing only one embodiment.
  • Figure 1 shows in perspective, the separate elements of the tube bending apparatus, in accordance with the present invention, and arranged in order of assembly;
  • FIG. 2 represents an external plan view of the apparatus at the end of the bending operation of a tube in the shape of a gendarme's cap with equal branches;
  • Figure 3 shows a front view and in section along line 3-3 of Figure 2;
  • Figure 4 shows a front view and in section along line 4-4 of Figure 2;
  • FIG. 5 represents a partial perspective view of the frame, illustrating the arrangement of oblong and squared graduated openings in the shape of a tee, for the adjustable mounting of at least one counter-form;
  • FIG. 6 represents a plan view, schematically illustrating the formation of a simple bending with the apparatus according to the invention;
  • Figures 7 and 8 show plan views schematically illustrating the formation of an esse-shaped bend with the apparatus according to the invention;
  • Figures 9, 10 and 11 show plan views schematically illustrating the formation of a bend in the shape of a policeman's cap with equal branches, with the apparatus according to the invention;
  • FIG. 12 represents a plan view similar to FIG. 11, schematically illustrating the formation of a bend in the form of a policeman's cap with unequal branches, with the apparatus according to the invention;

Conformément à la présente invention, l'appareil à cintrer les tubes en forme de chapeau de gendarme ou en esse, comporte essentiellement, un bâti 1 sous forme de plateau, avec à l'arrière, une extrémité équerrée et renforcée 11 percée axialement en 12 pour le libre engagement à coulissement de la partie cylindrique graduée 21 d'une butée réglable 2 se terminant à l'extérieur par une collerette d'appui 22. Une tige de poussée 3 filetée, se visse axialement dans l'intérieur de la butée 2 et se présente en bout, au-dessus du bâti 1, avec une extrémité formant une portée méplate 31 munie d'une gorge 32 pour autoriser l'engagement de l'ouverture axiale 41 d'une forme 4 interchangeable ou cintre, sensiblement demi-circulaire, maintenue en position longitudinale par une goupille 5 se logeant dans la gorge 32. Chaque forme 4 avec périphériquement une gorge demi-circulaire 42 correspondant au diamètre extérieur du tube « T » à cintrer, est établie également avec un rayon R qui est normalisé.In accordance with the present invention, the apparatus for bending the tubes in the shape of a gendarme's hat or in esse, essentially comprises a frame 1 in the form of a tray, with at the rear, a square and reinforced end 1 1 drilled axially in 1 2 for the free sliding engagement of the graduated cylindrical part 2 1 of an adjustable stop 2 ending on the outside by a support flange 2 2 . A threaded push rod 3 is screwed axially into the interior of the stop 2 and is at the end, above the frame 1, with one end forming a flat surface 3 1 provided with a groove 3 2 to allow the engagement of the axial opening 4 1 of an interchangeable shape or hanger, substantially semicircular, maintained in the longitudinal position by a pin 5 being housed in the groove 3 2 . Each shape 4 with peripherally a semicircular groove 4 2 corresponding to the outside diameter of the tube “T” to be bent, is also established with a radius R which is standardized.

Du côté opposé, la tige de poussée 3 forme une tête 33 de poussée d'une machine qui permet d'exercer la pression telle un vérin, ou éventuellement d'une clé à levier à commande manuelle.On the opposite side, the push rod 3 forms a push head 3 3 of a machine which makes it possible to exert pressure such as a jack, or possibly a lever key with manual control.

Le bâti 1 forme également à l'avant, un profil en T dont les branches sont percées en épaisseur, de trous 13, 14, 15 disposés symétriquement par rapport à l'axe de la tige de poussée 3, mais décalés tant longitudinalement que transversalement. Une lumière longitudinale 16 graduée ou non, étant également prévue sur l'une des branches du bâti 1, parallèlement à la tige de poussée.The frame 1 also forms at the front, a T-profile whose branches are pierced in thickness, with holes 1 3 , 1 4 , 1 5 arranged symmetrically with respect to the axis of the push rod 3, but offset as much longitudinally than transversely. A longitudinal lumen 1 6 graduated or not, also being provided on one of the branches of the frame 1, parallel to the push rod.

Les trous 13, 14, 15 autorisent symétriquement par paires, la fixation par vissage ou autrement, d'une vis de blocage 6 destinée à maintenir en position un axe 7 dont la portée extérieure cylindrique permet le centrage à libre rotation, des contre-formes 8 circulaires ou en secteurs, munies périphériquement de gorges demi-circulaires 81 correspondant au diamètre extérieur du tube T à cintrer. Chaque contre-forme interchangeable 8 de diamètre variable suivant la valeur du rayon du cintre à obtenir, peut en outre être montée de par sa vis 6, symétriquement et dissymétriquement sur les trous 13, 14 ou 15 des branches du bâti 1, compte tenu de son diamètre extérieur et de son positionnement plus ou moins rapproché par rapport à l'axe de la forme 4, à seule fin d'obtenir des chapeaux de gendarme à écartement variable et à branches égales ou inégales.The holes 1 3 , 1 4 , 1 5 allow symmetrically in pairs, fixing by screwing or otherwise, a locking screw 6 intended to hold in position an axis 7 whose cylindrical outer surface allows centering with free rotation, circular counter-forms 8 or in sectors, peripherally provided with semicircular grooves 8 1 corresponding to the external diameter of the tube T to bend. Each interchangeable counter-shape 8 of variable diameter depending on the value of the radius of the hanger to be obtained, can also be mounted by its screw 6, symmetrically and asymmetrically on the holes 1 3 , 1 4 or 1 5 of the branches of the frame 1, given its outside diameter and its more or less close positioning relative to the axis of the form 4, for the sole purpose of obtaining gendarme hats with variable spacing and with equal or unequal branches.

Le bâti 1 forme de par ses faces latérales parallèles 17, une glissière de guidage de la section en U correspondante d'un support coulissant 9 sous forme de plaques, s'appliquant au-dessous dudit bâti 1. Ce dernier constitue symétriquement au droit des faces 17 et de chaque côté, une section équerrée à angle droit avec côté horizontal 91 disposé sensiblement dans le même plan que la face supérieure du bâti 1, et côté vertical 92 formant à sa base et intérieurement, une encoche 93 constituant la section supérieure en U de guidage.The frame 1 forms by its parallel lateral faces 1 7 , a guide slide of the corresponding U-shaped section of a sliding support 9 in the form of plates, applying below said frame 1. The latter constitutes symmetrically at right of the faces 1 7 and on each side, a square section at a right angle with horizontal side 9 1 disposed substantially in the same plane as the upper face of the frame 1, and vertical side 9 2 forming at its base and internally, a notch 9 3 constituting the upper U-shaped guide section.

A l'avant, le support 9 est établi avec une branche axiale et profilée 94 qui déborde de la face avant du bâti 1 et constitue en bout un bossage équerré 95 dans lequel se visse axialement une vis de manoeuvre 10 munie extérieurement d'un volant de manoeuvre 11. Du côté opposé, la vis 10 constitue une portée épaulée 101 munie d'une gorge circulaire 102 de manière à s'engager dans l'ouverture correspondante 18 d'un bossage axial 19 formé en bout du bâti 1. Une goupille 12 s'engageant dans la gorge 102, assure l'accouplement en translation, vis 10 et bâti 1.At the front, the support 9 is established with an axial and profiled branch 9 4 which projects beyond the front face of the frame 1 and constitutes at the end a squared boss 9 5 in which an operating screw 10 is axially screwed provided externally with a handwheel 11. On the opposite side, the screw 10 constitutes a shouldered seat 10 1 provided with a circular groove 10 2 so as to engage in the corresponding opening 1 8 with an axial boss 1 9 formed at the end of the frame 1. A pin 12 engaging in the groove 10 2 , ensures the coupling in translation, screw 10 and frame 1.

On souligne également que sans sortir du cadre de l'invention, il est prévu de remplacer la vis 10 par une tige de manoeuvre coulissante, agissant en translation en vue du déplacement du bâti 1 et commandée par vérin ou moyen mécanique tel que câme, clé à levier...It is also emphasized that without departing from the scope of the invention, it is planned to replace the screw 10 with a sliding operating rod, acting in translation for the displacement of the frame 1 and controlled by jack or mechanical means such as cam, key lever ...

Il faut considérer que chaque section équerrée du support coulissant 9 autorise l'assise d'un galet 13 sous forme d'un bloc parallélépipèdique à section rectangulaire telle que carrée, dont chaque face comporte une creusure-longitudinale 131 sensiblement demi-circulaire, calibrée suivant les diamètres extérieurs des tubes usuels utilisés. Chaque galet 13 est en outre percé dissymétriquement et en épaisseur, en. 132, suivant deux directions perpendiculaires, pour permettre avec jeu et suivant deux positions, son engagement sur une tige de positionnement 14 fixée verticalement sur le côté horizontal 91 de la section équerrée.It must be considered that each squared section of the sliding support 9 authorizes the seat of a roller 13 in the form of a rectangular block such as a square section, each face of which has a substantially semi-circular recess 13 1 , calibrated according to the outside diameters of the usual tubes used. Each roller 13 is also drilled asymmetrically and in thickness, in. 13 2 , in two perpendicular directions, to allow with play and in two positions, its engagement on a positioning rod 14 fixed vertically on the horizontal side 9 1 of the squared section.

De ce fait, chaque galet 13 se présente tangentiellement et perpendiculairement en regard de la contre-forme correspondante 8, quel que soit son positionnement, avec une possibilité d'écartement ou de rapprochement, en agissant sur le volant de manoeuvre 11 qui commande le déplacement axial du support coulissant 9 par rapport au bâti 1.Therefore, each roller 13 is present tangentially and perpendicularly opposite the corresponding counterform 8, whatever its positioning, with a possibility of spacing or reconciliation, by acting on the handwheel 11 which controls the movement axial of the sliding support 9 relative to the frame 1.

L'on conçoit donc que le tube T engagé dans les gorges 81 des deux contre-formes 8, est ainsi enserré et rigoureusement maintenu en position, par suite du rapprochement et de l'appui des galets 13 qui s'appliquent rigoureusement lors du serrage, sur les faces verticales, pouvant être inclinées entre elles, de sections équerrées, en formant ainsi contre-appui du tube T, de manière à permettre le positionnement rigoureux des deux gorges 81 et 131. A cet effet, le galet 13 peut éventuellement avoir un léger déplacement en hauteur lors du serrage.It is therefore understandable that the tube T engaged in the grooves 8 1 of the two counterforms 8, is thus clamped and rigorously held in position, as a result of the approximation and the support of the rollers 13 which apply rigorously during the clamping, on the vertical faces, which can be inclined between them, of squared sections, thereby forming a counter-support of the tube T, so as to allow the rigorous positioning of the two grooves 8 1 and 13 1 . For this purpose, the roller 13 may possibly have a slight displacement in height during tightening.

Selon ces dispositions, l'on remarque également que la tige de poussée 3 et la vis de manoeuvre 10 se situent en alignement, suivant un même axe, pour assurer un équilibre parfait lors de l'opération de cintrage, et un serrage égal du tube T au droit des galets 13 par rapport aux contre-formes 8.According to these provisions, it is also noted that the push rod 3 and the operating screw 10 are in alignment, along the same axis, to ensure perfect balance during the bending operation, and equal tightening of the tube T at the level of the rollers 13 relative to the counter-forms 8.

On remarque que cet appareil ainsi réalisé peut être utilisé pour l'obtention d'un cintrage simple ou coude d'un tube, comme illustré figure 6 des dessins.Note that this device thus produced can be used to obtain a simple bend or bend of a tube, as illustrated in Figure 6 of the drawings.

Dans ce cas, le support coulissant 9 est retiré et seul le bâti 1, équipé de la tige de poussée 3 munie de la forme 4 et des contre-formes correspondantes 8, est utilisé. Le.tube T est placé sur les deux contre-formes 8 placées symétriquement ou non, et la forme 4 exerce à la façon connue, un appui axial ou dissymétrique suivant flèche F, pour l'obtention d'un coude T1 avec branches adjacentes en forme de V.In this case, the sliding support 9 is removed and only the frame 1, equipped with the push rod 3 provided with the form 4 and the corresponding counter-forms 8, is used. Le.tube T is placed on the two counter-forms 8 placed symmetrically or not, and the form 4 exerts in the known manner, an axial or asymmetrical support according to arrow F, for obtaining a bend T 1 with adjacent branches V-shaped

Dans le cas d'utilisation de l'appareil pour réaliser un esse ou cintrage en baïonnette, d'un tube T avec un déport des deux branches parallèles suivant une côte X, la contre-forme 8 disposée du côté de la lumière longitudinale 16 du bâti, est fixée de par sa vis de blocage 6 et son axe 7, dans ladite lumière 16 suivant un écartement par rapport à l'autre contre-forme correspondant à la côte X, le déplacement et réglage s'effectuant soit par les graduations ou encore par mesure.In the case of use of the apparatus for carrying out an esse or bending in bayonet, of a tube T with an offset of the two parallel branches along a dimension X, the counterform 8 arranged on the side of the longitudinal light 1 6 of the frame, is fixed by its locking screw 6 and its axis 7, in said lumen 1 6 according to a spacing with respect to the other counterform corresponding to the dimension X, the displacement and adjustment being effected either by the graduations or by measure.

On remarque à cet effet, que comme illustré figure 5, la branche correspondante du bâti 1 peut en variante, former une ouverture 101 en forme de T, autorisant le déplacement de la vis de blocage 6 suivant deux directions perpendiculaires par rapport à l'autre contre-forme.It is noted for this purpose that, as illustrated in FIG. 5, the corresponding branch of the frame 1 can alternatively form an opening 10 1 in the shape of a T, allowing the displacement of the locking screw 6 in two directions perpendicular to the other counterform.

Le tube T est disposé en appui sur les creusures 131 des galets 13, puis serré en regard de la contre-forme 8 non déportée, par l'intermédiaire du volant de manoeuvre 11, comme illustré figure 7.The tube T is placed in abutment on the recesses 13 1 of the rollers 13, then clamped opposite the non-offset counterform 8, by means of the operating handwheel 11, as illustrated in FIG. 7.

La forme 4 est ensuite amenée directement en contact sur le tube T, par simple coulissement de la tige de poussée 3, tandis que la butée réglable 2 est réglée longitudinalement en position, par vissage ou dévissage sur ladite tige de poussée 3, de manière à présenter le chiffre de sa graduation 23 correspondant à la côte X, par rapport à la face extérieure de la partie équerrée 11 du bâti 1.The form 4 is then brought directly into contact with the tube T, by simple sliding of the push rod 3, while the adjustable stop 2 is adjusted longitudinally in position, by screwing or unscrewing on said push rod 3, so as to present the number of its graduation 2 3 corresponding to the dimension X, in relation to the face outside of the squared part 1 1 of the frame 1.

.L'on conçoit que l'effort de poussée exercé sur le tige 3 (flèche F1) jusqu'au contact de la collerette d'appui 22 de la butée 2 sur la partie équerrée 11 et suivant le préréglage correspondant à la côte X, autorise ainsi, comme illustré figure 8, la formation d'un esse avec deux branches parallèles écartées entre elles suivant la côte X correspondant à l'écartement des contre-formes 8 et à la course de déplacement de la forme 4.We can see that the pushing force exerted on the rod 3 (arrow F1) until contact with the support flange 2 2 of the stop 2 on the square part 1 1 and according to the preset corresponding to the coast X, thus authorizes, as illustrated in FIG. 8, the formation of an esse with two parallel branches spaced apart along the dimension X corresponding to the spacing of the counter-forms 8 and to the displacement travel of the form 4.

On considère également que le déplacement contrôlé de la forme 4 par l'intermédiaire de la butée réglable 2, peut être utilisé également pour un cintrage simple.It is also considered that the controlled displacement of the form 4 by means of the adjustable stop 2, can also be used for simple bending.

Selon les figures 9, 10, 11 et 12, l'appareil permet la réalisation d'un chapeau de gendarme à branches égales ou inégales, à partir d'un tube T.According to Figures 9, 10, 11 and 12, the device allows the production of a gendarme hat with equal or unequal branches, from a tube T.

Dans le cas d'obtention d'un chapeau de gendarme à branches égales, l'écartement symétrique E des contre-formes 8, est réglé compte tenu de leur diamètre et de l'ouverture du chapeau de gendarme à obtenir.In the case of obtaining a gendarme hat with equal branches, the symmetrical spacing E of the counterforms 8, is adjusted taking into account their diameter and the opening of the gendarme hat to be obtained.

Le tube rectiligne T est ensuite mis en place sur les gorges 81 des contre-formes 8, puis serré par le volant de manoeuvre 11 qui déplace le support coulissant 9 en vue de l'appui des galets 13. La forme 4 est comme précédemment, amenée tangentiellement en contact sur ledit tube T, tandis que la butée réglable 2 est déplacée par rapport à la tige de poussée 3, pour assurer le positionnement du chiffre de sa graduation correspondant à la côte X de déplacement de la forme 4 jusqu'à la position de butée de la collerette d'appui 2 2.The rectilinear tube T is then put in place on the grooves 8 1 of the counterforms 8, then clamped by the operating handwheel 11 which moves the sliding support 9 in order to support the rollers 13. The shape 4 is as before , brought tangentially into contact on said tube T, while the adjustable stop 2 is moved relative to the push rod 3, to ensure the positioning of the figure of its graduation corresponding to the dimension X of displacement of the form 4 to the stop position of the support flange 2 2 .

L'opération terminée, il suffit ensuite de desserrer les galets 13 par rapport aux contre-formes 8, pour dégager le tube cintré.The operation finished, it then suffices to loosen the rollers 13 with respect to the counterforms 8, to release the curved tube.

Dans le cas d'obtention d'un chapeau de gendarme à branches inégales, comme illustré figure 12, les contre-formes 8 de rayons identiques ou différents, sont décalées par rapport à l'axe de la forme 4, de manière à obtenir deux écartements inégaux D et D1. Dans ce cas, les galets 13 ou le galet 13 correspondant à la contre-forme 8 la plus éloignée ou de plus grand diamètre, peuvent être positionnés différemment sur tours tiges 14, par retournement de 180 degrés, par rapport à leurs trous 132, de manière à permettre rigoureusement, l'appui tangentiel et le serrage des branches du tube T, par rapport auxdites contre-formes.In the case of obtaining a gendarme hat with unequal branches, as illustrated in FIG. 12, the counter-forms 8 of identical or different radii are offset with respect to the axis of the form 4, so as to obtain two unequal spacings D and D1. In this case, the rollers 13 or the roller 13 corresponding to the most distant or larger counter-shape 8 can be positioned differently on rod towers 14, by turning 180 degrees, relative to their holes 13 2 , so as to allow rigorously, the tangential support and the tightening of the branches of the tube T, with respect to said counter-forms.

On souligne selon l'invention :

  • - la disposition des galets 13 qui coopèrent avec les contre-formes 8, de manière à enserrer le tube T, en vue de son freinage, laminage et guidage parfait lors de son enroulement ou cintrage sur lesdites contre-formes et sous l'action unique de poussée de la forme 4 ; cette caractéristique autorisant d'une manière parfaite le cintrage de tubes minces avec des branches rigoureusement parallèles ;
  • - l'effort unique de poussée de la forme 4, par rapport aux contre-formes 8 constituant une triangulation, pour assurer un équilibre parfait et un glissement égal des deux côtés du tube T et une même friction par rapport aux galets 13 ;
  • - l'effort unique triangulé de serrage des galets 13 sur le tube T, rigoureusement égal au droit de chaque contre-forme 8 ;
  • - la disposition de la butée réglable 2 qui permet d'exécuter un grand nombre de cintrages successifs et identiques, ou de réaliser un cintre d'une valeur donnée quel que soit le rayon ou le diamètre du tube ;
  • - la disposition de la butée réglable 2 qui permet de réaliser des cintres de profondeurs variables pour un même rayon ;
  • - la possibilité de variations en écartement symétrique ou non du positionnement des axes des contre-formes 8, selon le rayon de cintrage de la forme 4 ;
  • - l'interchangeabilité des contre-formes 8, de la forme 4 et des galets 13, selon le diamètre extérieur du tube T et les rayons de cintrage à obtenir ;
  • - la possibilité de positionnement dissymétrique des contre-formes 8 par rapport à la tige de poussée 3 et à la vis 10, pour obtenir des chapeaux de gendarme à branches inégales.
It is emphasized according to the invention:
  • - The arrangement of the rollers 13 which cooperate with the counter-forms 8, so as to enclose the tube T, with a view to its braking, rolling and perfect guiding during its winding or bending on said counter-forms and under the single action form 4 thrust; this characteristic allowing perfectly the bending of thin tubes with rigorously parallel branches;
  • - The unique pushing force of the form 4, with respect to the counter-forms 8 constituting a triangulation, to ensure perfect balance and equal sliding on both sides of the tube T and the same friction with respect to the rollers 13;
  • - The single triangulated force for tightening the rollers 13 on the tube T, strictly equal to the right of each counterform 8;
  • - the arrangement of the adjustable stop 2 which makes it possible to execute a large number of successive and identical bends, or to produce a hanger of a given value whatever the radius or the diameter of the tube;
  • - the arrangement of the adjustable stop 2 which makes it possible to produce hangers of variable depths for the same radius;
  • - The possibility of variations in symmetrical spacing or not of the positioning of the axes of the counter-forms 8, according to the bending radius of the form 4;
  • - the interchangeability of the counter-forms 8, of the form 4 and of the rollers 13, according to the outside diameter of the tube T and the bending radii to be obtained;
  • - The possibility of asymmetrical positioning of the counter-forms 8 relative to the push rod 3 and to the screw 10, in order to obtain gendarme hats with uneven branches.

On note également que les faces d'appui des galets 13, légèrement inclinées entre elles pour former un V, compensent le rappel élastique des branches du tube, après cintrage, en vue de leur positionnement rigoureux.It is also noted that the bearing faces of the rollers 13, slightly inclined between them to form a V, compensate for the elastic return of the branches of the tube, after bending, with a view to their rigorous positioning.

Claims (9)

1. Apparatus for bending the tubes (T), in the form of a gendarm hat or of an ess, of the type comprising a mobile stamping form (4) between two counter-forms (8) maintained on a framework (1) with counter-abutment rollers (13) of the free portions of the tube (T) to be bent, mounted on a support which is sliding relative to said framework (1) with axial handling means, the lateral counter-forms (8) mounted on the same framework (1) receiving the push rod of the form (4) and the control means for the shifting thereof, and co-operating tangentially along the supporting points of the tube (T), prior to the bending thereof, with counter-abutment rollers (13), characterized in that these counter-abutment rollers (13) are nounted on a support (9) to provide a clamping of the tube (T) and that the form (4) is made mobile independently of the counter-abutment rollers (13) in order to provide during the bending process by partial of the portions of the tube (T) on the counter-forms (8) a guiding, sliding and rolling effect for the whole time of the operation, so as to make possible without any distortion the machining of thin tubes and the production of branch pipes which are substantially parallel.
2. Apparatus as claimed in Claim 1, characterized in that the framework (1) receiving the form (4) with the push rod thereof and the counter-forms (8) in accordance with a triangulation constitutes by means of the lateral sides a translation guide means for the lower sliding support (9) the rear transverse branch of which, projecting from said framework, constitutes a plurality of squared and symetrical abutments disposed approximately within the plane of the upper face of the framework, for housing the rollers (13) moved opposite the counterforms (8) and respectively held in position through the intermediary of an offset finger (14) crossing with backlassh a corresponding aperture (132), and permitting the positioning of said roller (13) according two positions while taking into account the spacing of the said counter-forms (8).
3. Apparatus as claimed in Claims 1 and 2, characterized in that each counter-abutment roller (13) is in the form of a parallelepiped-shaped block for being housed on the squared sections of the support (9) and being abutted for the clamping on the slanting V-shaped vertical faces (92), said faces being slanted or not relative to one another.
4. Apparatus as claimed in Claims 1, 2 and 3, characterized in that the sliding lower support (9) receiving the rollers (13) forms at the end of the εxial and protruding branch thereof a squared boss (93) in order to allow for the screwing of an actuating screw (10) or the housing of a rod sliding in translation, coupled in translation with a second boss ( 19) formed at the end of the framework (1) ; said actuating screw (1.0) or said rod being disposed substantially within the same axis as the push rod (3) constituting thereby with respect to the rollers (13) a triangulation opposite to the triangulation formed by the counter-forms (8) and the form (4).
5. Apparatus as claimed in Claims 1, 2, 3 and 4, characterized in that the push rod (3) of the stamping form (4) is threaded externally for the screwing of the adjustable stop (2) which is freely centered within the bore 12) of the squared end (11) of the framework (1) while forming at the end a collar (29 which co-operates in abutment against the said end (11) at stroke end or maximal off-travel of the bend, a scale (23) established externally on the bearing face of said stop (2) making it possible, from the initial position of tangential abutment of the form (4) on the tube (T) in the clamping position, to obtain by means of the controlled positioning of the collar (22) relative to the squared end (11) of the framework (1) the vertical adjustment of the infeed of the pushrod (3) and the abutment thereof at stroke end.
6. Apparatus as claimed in Claims 1, 2, 3, 4 and 5, characterized in that one at least of the counter-forms (8) can be fixed within a longitudinal graduated port (18) of the framework (1), parallel to the push rod (3), to permit, with the other counter-form, the obtention of a spacing (X) corresponding to the starting point of the two parallel branches in the case of the embodiment of an ess upon a tube (T).
7. Apparatus as claimed in Claims 1, 2, 3, 4 and 5, characterized in that an alternative form of embodiment, the counter-forms (8) can be shifted within graduated slots (11°) which are T-shaped and established within the thickness of the framework (1) for the offset adjustment as well as the spacing adjustment of said counter-forms, which counter-forms (8) may be spaced symmetrically or not relative to the push rod. (3) of the form (4) for the obtention of gendarm hats with unequal or equal branches.
8. Apparatus as claimed in Claims 1, 2, 3, 4, 6 and 7, characterized in that one of the counter- forms (8), in the case of an ess to be formed with two parallel branches connected by two bends, is offset within the longitudinal port (18) in accordance with the spacing (X) of the branches of the axis to be obtained, while the tube (T) is disposed in abutment on the recess of the other counter-form and maintained in the clamping position by the corresponding roller (13), the pushing stress of the form (4) controlled by the stop (2) in accordance with the spacing of the branches to be obtained permitting the formation of the ess.
9. Apparatus as claimed in Claims 1, 2, 3, 4, 5, 6 and 7, characterized in that the counter-forms (8), when a gendarm hat with equal or unequal branches is to be formed, have the same diameter or a different diameter, are disposed symmetrically or not relative to the push rod (3), and permit by means of their recesses (81) the abutment of the tube (T) maintained in the clamping position by the corresponding rollers (13), while the pushing stress of the form (4), controlled by the stop (2), is applied on said clamped tube (T), ensuring the formation of the gendarm hat.
EP80420102A 1979-09-03 1980-08-25 Apparatus for bending tubes in crank or s shape Expired EP0025002B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80420102T ATE3819T1 (en) 1979-09-03 1980-08-25 DEVICE FOR DOUBLE BROPPING OR S-FORMING PIPE BENDING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7922359 1979-09-03
FR7922359A FR2464109A1 (en) 1979-09-03 1979-09-03 APPARATUS FOR BENDING TUBES IN THE FORM OF HAT OF GENDARME OR IN ESSE

Publications (2)

Publication Number Publication Date
EP0025002A1 EP0025002A1 (en) 1981-03-11
EP0025002B1 true EP0025002B1 (en) 1983-06-22

Family

ID=9229433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80420102A Expired EP0025002B1 (en) 1979-09-03 1980-08-25 Apparatus for bending tubes in crank or s shape

Country Status (7)

Country Link
EP (1) EP0025002B1 (en)
AT (1) ATE3819T1 (en)
DE (1) DE3063896D1 (en)
DK (1) DK367780A (en)
FI (1) FI802758A (en)
FR (1) FR2464109A1 (en)
NO (1) NO153324C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008033862A1 (en) * 2008-07-19 2010-01-21 Bosch Mahle Turbo Systems Gmbh & Co. Kg Bending unit for bending wastegate bar at supercharger for adjusting length of wastegate bar, has U-shaped retaining body, which has two shanks having retaining outline

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH066212B2 (en) * 1988-01-12 1994-01-26 株式会社オグラ Bending correction machine
GB8911180D0 (en) * 1989-05-16 1989-07-05 Deritend Engineering 1983 Ltd Box makers formes
IT1290741B1 (en) * 1997-04-01 1998-12-10 Claudio Bernardinis AUTOMATIC HEAD AND TAIL BENDING UNIT OF ROD AND/OR METAL WIRE FOR BENDING MACHINES AND/OR FORMING MACHINES

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2867261A (en) * 1955-02-23 1959-01-06 Blackhawk Mfg Co Pipe bender with bend indicator means on pivotal reaction blocks
GB814151A (en) * 1956-04-25 1959-05-27 Andre Huet Improvements in and relating to tube bending machines
FR1572453A (en) * 1968-05-02 1969-06-27
FR1592154A (en) * 1968-10-28 1970-05-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008033862A1 (en) * 2008-07-19 2010-01-21 Bosch Mahle Turbo Systems Gmbh & Co. Kg Bending unit for bending wastegate bar at supercharger for adjusting length of wastegate bar, has U-shaped retaining body, which has two shanks having retaining outline

Also Published As

Publication number Publication date
ATE3819T1 (en) 1983-07-15
DK367780A (en) 1981-03-04
FR2464109B1 (en) 1983-10-28
FI802758A (en) 1981-03-04
EP0025002A1 (en) 1981-03-11
NO153324C (en) 1986-02-26
NO153324B (en) 1985-11-18
FR2464109A1 (en) 1981-03-06
NO802568L (en) 1981-03-04
DE3063896D1 (en) 1983-07-28

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