EP0025002A1 - 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
EP0025002A1
EP0025002A1 EP80420102A EP80420102A EP0025002A1 EP 0025002 A1 EP0025002 A1 EP 0025002A1 EP 80420102 A EP80420102 A EP 80420102A EP 80420102 A EP80420102 A EP 80420102A EP 0025002 A1 EP0025002 A1 EP 0025002A1
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EP
European Patent Office
Prior art keywords
tube
counter
support
frame
forms
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Granted
Application number
EP80420102A
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German (de)
French (fr)
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EP0025002B1 (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 the shaping and more particularly the mechanical work of the tubes, mainly with a view to bending them, for the production of hangers in the shape of a policeman's hat or in esse, in order to obtain a crossing with another perpendicular tube disposed in the same plane, or even to avoid an obstacle in the case of an esse forming two successive bends in opposite directions.
  • an interchangeable form of bending acts perpendicularly in thrust on the tube held on the opposite side and symmetrically by lateral counter-forms, while spaced rollers, mobile or fixed, largely arranged in outside of said counter-forms, serve only as support or external stop on each side, for the free rectilinear part of the tube, during the forming operation.
  • 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.
  • the rectilinear branches are no longer parallel.
  • the present invention aims to remedy these drawbacks.
  • the invention solves the problem consisting in that lateral counter-forms cooperate tangentially along the support points of the rectilinear tube before its bending, with rollers for supporting and clamping the tube, to thus ensure after its clamping and under the pushing action of the shape, its deformation with a sliding, rolling and guiding effect during the entire operation of forming the gendarme hat or the esse.
  • 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 shape of a policeman's cap with unequal branches, with the apparatus according to the 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 provided with a groove 3 2 to allow the engagement of the axial opening 4 of an interchangeable form 4 or hanger, substantially semi-circular, held in the longitudinal position by a pin 5 which is 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 d i s-placed symmetrically with respect to the axis of the push rod 3 , but offset both longitudinally and transversely.
  • the holes 1 3 , 1 4 , 1 5 allow symmetrically in pairs, the fixing by screwing or otherwise, of a locking screw 6 intended to hold in position an axis 7 whose cylindrical outer surface allows centering with free rotation, circular or sector counter-forms 8, provided peripherally with semicircular grooves 8 1 corresponding to the outside diameter of the tube T to be bent.
  • 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 forms at the end a squared boss 9 5 in which is screwed axially, an operating screw 10 provided externally with 'an operating handwheel 11.
  • the screw 10 constitutes a supported shoulder 10 1 provided with a circular groove 10 2 so as to engage in the corresponding opening 1 with an axial boss 1 9 formed at the end of the frame 1.
  • a pin 12 engaging in the groove 10, 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 longitudinal groove 13 1 , calibrated according to the outside diameters of the usual tubes used.
  • Each roller 13 is further drilled asymmetrically and thickly, at 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 an equal clamping da tube T in line with 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.
  • the tube T is placed on the two counterforms 8 placed symmetrically or not, and the form 4 exerts in the known manner, an axial or asymmetrical support according to arrow F, to obtain a bend T with adjacent branches in shape of V.
  • the counter-form 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 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 even 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 on 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 figure of its graduation 2 3 corresponding to the dimension X, with respect to the external face 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 tightened by the 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 with the 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 form 4 up
  • 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 against-form 8 furthest or larger diameter may be positioned differently on their stems 14 by turning-180 degrees, rap - their holes harbor 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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  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Paper (AREA)
  • Air Bags (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Developing Agents For Electrophotography (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 le façonnage et plus particulièrement le travail mécanique des tubes, principalement en vue de leur cintrage, pour la réalisation de cintres en forme de chapeau de gendarme ou en esse, afin d'obtenir un croisement avec un autre tube perpendiculaire disposé dans un même plan, ou encore d'éviter un obstacle dans le cas d'un esse formant deux coudes successifs en sens opposé.The invention relates to the shaping and more particularly the mechanical work of the tubes, mainly with a view to bending them, for the production of hangers in the shape of a policeman's hat or in esse, in order to obtain a crossing with another perpendicular tube disposed in the same plane, or even to avoid an obstacle in the case of an esse forming two successive bends in opposite directions.

Dans les appareils à cintrer les tubes connus de ce genre, 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 devices for bending known tubes of this kind, an interchangeable form of bending acts perpendicularly in thrust on the tube held on the opposite side and symmetrically by lateral counter-forms, while spaced rollers, mobile or fixed, largely arranged in outside of said counter-forms, serve only as support or external stop on each side, for the free rectilinear part of the tube, during the forming operation.

Avec un tel appareil, le cintrage des tubes épais s'effectue dans de bonnes conditions, mais contrairement, le cintrage de tubes minces est défectueux par suite du non maintien du dit 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 rectilinear branches are no longer parallel.

La présente invention a pour but de remédier à ces inconvénients. Telle que caractérisée dans les revendications, l'invention résout le problème consistant en ce que des contre-formes latérales coopèrent tangentiellement suivant les points d'appui du tube rectiligne avant son cintrage, avec des galets de contre-appui et de serrage du tube, pour assurer ainsi après son enserrage et sous l'action de poussée de la forme, sa déformation avec un effet de glissement, de laminage et de guidage pendant toute l'opération de formation du chapeau de gendarme ou de l'esse.The present invention aims to remedy these drawbacks. As characterized in the claims, the invention solves the problem consisting in that lateral counter-forms cooperate tangentially along the support points of the rectilinear tube before its bending, with rollers for supporting and clamping the tube, to thus ensure after its clamping and under the pushing action of the shape, its deformation with a sliding, rolling and guiding effect during the entire operation of forming the gendarme hat or the esse.

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.The invention is set out below in more detail, with the aid of drawings representing only one embodiment.

  • 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 ;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;
  • 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 ;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;
  • La figure 3 représente une vue de face et en coupe suivant la ligne 3-3 de la figure 2 ;Figure 3 shows a front view and in section along line 3-3 of Figure 2;
  • La figure 4 représente une vue de face et en coupe suivant la ligne 4-4 de la figure 2 ;Figure 4 shows a front view and in section along line 4-4 of 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 ;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;
  • La figure 6 représente une vue en plan, illustrant schématiquement la formation d'un cintrage simple avec l'appareil selon l'invention ;FIG. 6 represents a plan view, schematically illustrating the formation of a simple bending with the apparatus according to the 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 ;Figures 7 and 8 show plan views schematically illustrating the formation of a bend in form of esse with the apparatus according to the 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 ;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;

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 ;FIG. 12 represents a plan view similar to FIG. 11, schematically illustrating the formation of a bend in the shape 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 3 munie d'une gorge 32 pour autoriser l'engagement de l'ouverture axiale 4 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 provided with a groove 3 2 to allow the engagement of the axial opening 4 of an interchangeable form 4 or hanger, substantially semi-circular, held in the longitudinal position by a pin 5 which is 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, 1 4, 15 dis-posés 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 d i s-placed symmetrically with respect to the axis of the push rod 3 , but offset both longitudinally and transversely. A longitudinal light 1 6 graduated or not, being also 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 1 3, 1 4 ou 1 5 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, the fixing by screwing or otherwise, of a locking screw 6 intended to hold in position an axis 7 whose cylindrical outer surface allows centering with free rotation, circular or sector counter-forms 8, provided peripherally with semicircular grooves 8 1 corresponding to the outside diameter of the tube T to be bent. 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 1 d'un bossage axial 19 formé en bout du bâti 1. Une goupille 12 s'engageant dans la gorge 10 , 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 forms at the end a squared boss 9 5 in which is screwed axially, an operating screw 10 provided externally with 'an operating handwheel 11. On the opposite side, the screw 10 constitutes a supported shoulder 10 1 provided with a circular groove 10 2 so as to engage in the corresponding opening 1 with an axial boss 1 9 formed at the end of the frame 1. A pin 12 engaging in the groove 10, 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 longitudinal groove 13 1 , calibrated according to the outside diameters of the usual tubes used. Each roller 13 is further drilled asymmetrically and thickly, at 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 da 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 an equal clamping da tube T in line with 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 T 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. The tube T is placed on the two counterforms 8 placed symmetrically or not, and the form 4 exerts in the known manner, an axial or asymmetrical support according to arrow F, to obtain a bend T with adjacent branches in shape of V.

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 1 6 du bâti, est fixée de par sa vis de blocage 6 et son axe 7, dans ladite lumière 1 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 counter-form 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 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 even 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 13 1 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 2 3 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 on 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 figure of its graduation 2 3 corresponding to the dimension X, with respect to the external face of the squared part 1 1 of the frame 1.

L'on conçoit que l'effort de poussée exercé sur la tige 3 (flèche F1) jusqu'au contact de la collerette d'appui 22 de la butée 2 sur la partie équerrée 1 et suivant le pré- réglage 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.It is understood that the thrust 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 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.The rectilinear tube T is then put in place on the grooves 8 1 of the counterforms 8, then tightened by the handwheel 11 which moves the sliding support 9 in order to support the rollers 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'àThe shape 4 is as before, brought tangentially into contact with the 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 form 4 up

la position de butée de la collerette d'appui 22.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 leurs tiges 14, par retournement de-180 degrés, par rap- port 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 against-form 8 furthest or larger diameter may be positioned differently on their stems 14 by turning-180 degrees, rap - their holes harbor 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 cotés 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.
According to the invention, it is emphasized:
  • - 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 unique action of form 4 push; 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 provision of the adjustable stop 2 which allows for hangers of varying 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. 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 support, avec galet de retenue des parties libres du tube à cintrer, caractérisé par le fait que les contre-formés latérales (8) montées sur un même bâti (1) recevant la tige de poussée de la forme (4) et le moyen de contrôle de son déplacement, coopèrent tangentiellement suivant les points d'appui du tube (T), avant son cintrage, avec des galets de contre-appui (13) et de serrage, montés sur un support coulissant et réglable (9) par rapport audit bâti (1) avec moyen axial de manoeuvre, pour assurer lors du travail de cintrage par enroulement partiel des parties de tube (T) sur les contre-formes (8), 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 laréali- sation de branches rigoureusement parallèles ;1. Apparatus for bending tubes in the shape of a policeman's cap or in esse, of the type comprising a form of movable stamping between two counter-forms maintained on a support, with a roller for retaining the free parts of the tube to be bent, characterized by fact that the lateral counterforms (8) mounted on the same frame (1) receiving the push rod of the form (4) and the means for controlling its movement, cooperate tangentially along the support points of the tube (T ), before its bending, with rollers of support (13) and clamping, mounted on a sliding and adjustable support (9) relative to said frame (1) with axial operating means, to ensure during the bending work by partial winding of the tube parts (T) on the counterforms (8), a guiding, sliding and rolling effect during the whole operation, so as to allow, without any deformation, the working of thin and wide tubes - location of strictly parallel branches; 2. Appareil selon la revendication 1, caractérisé en ce que le bâti (1) recevant la forme (4) avec sa tige de poussée et les contre-formes (8) suivant une triangulation, constitue de par des côtés latéraux, un moyen de guidage en translation du support inférieur coulissant (9) dont la branche transversale arrière débordante dudit châssis, constitue des appuis équerrés et symétriques disposés sensiblement dans le plan de la face supérieure du bâti, pour autoriser le logement des galets (13) se présentant en regard des contre-formes (8)et maintenus respectivement en position par l'intermédiaire d'un doigt (14) décalé, traversant avec jeu une ouverture (132) correspondante, et autorisant la mise en place dudit galet (13) suivant deux positions, compte tenu de l'écartement desdites contre-formes (8) ;2. Apparatus according to claim 1, characterized in that the frame (1) receiving the form (4) with its push rod and the counter-forms (8) according to a triangulation, constitutes from lateral sides, a means of guiding in translation of the sliding lower support (9) whose rear transverse branch projecting from said chassis, constitutes squared and symmetrical supports arranged substantially in the plane of the upper face of the frame, to allow the housing of the rollers (13) appearing opposite counterforms (8) and held respectively in position by means of an offset finger (14), crossing with clearance a corresponding opening (13 2 ), and authorizing the positioning of said roller (13) in two positions , taking into account the spacing of said counterforms (8); 3. Appareil selon les revendications 1 et 2, caractérisé par le fait que chaque galet (13) de contre-appui, se présente sous forme d'un bloc parallélépipèdique pour se loger sur les sections équerrées du support (9), et prendre appui lors du serrage, sur les faces verticales (92) inclinées en forme de V, l'une par rapport à l'autre, ou encore non inclinées;3. Apparatus according to claims 1 and 2, characterized in that each roller (13) against support, is in the form of a rectangular block to be housed on the squared sections of the support (9), and take support during the clamping, on the vertical faces (9 2 ) inclined in a V shape, one with respect to the other, or even not inclined; 4. Appareil selon les revendications 1, 2 et 3, caractérisé par le fait que le support inférieur coulissant (9) recevant les galets (13), forme en bout de sa branche axiale et débordante, un bossage équerré (95) pour le vissage d'une vis de manoeuvre (10) ou le logement d'une tige coulissant en translation, accouplée en translation avec un deuxième bossage (19) formé en bout de bâti (1) ; ladite vis de manoeuvre (10) ou la tige, étant rigoureusement disposée dans le même axe que la tige de poussée (3) en constituant ainsi eu égard aux galets (13), une triangulation opposée à celle formée par les contre-formes (8) et la forme (4) ;4. Apparatus according to claims 1, 2 and 3, characterized in that the sliding lower support (9) receiving the rollers (13), forms at the end of its axial and projecting branch, a squared boss (9 5 ) for the screwing an operating screw (10) or the housing of a rod sliding in translation, coupled in translation with a second boss (1 9 ) formed at the end of the frame (1); said maneuvering screw (10) or the rod, being rigorously disposed in the same axis as the push rod (3) thus constituting with respect to the rollers (13), a triangulation opposite to that formed by the counter-forms (8 ) and the form (4); 5. Appareil selon les revendications 1, 2, 3 et 4, caractérisé par le fait que la tige de poussée (3) de la forme d'emboutissage (4) est filetée extérieurement pour le vissage de la butée réglable (2) centrée librement dans l'alésage (12) de l'extrémité équerrée (1 ) du bâti (1), en formant en bout, une collerette (22) qui coopère en appui contre ladite extrémité (11) en fin de course ou déport maximum du cintre, une graduation (23) établie extérieurement sur la portée de ladite butée (2), permettant depuis la position initiale d'appui tangentiel de la forme (4) sur le tube (T) en position de serrage, d'obtenir de par le positionnement contrôlé de la collerette (22) par rapport à l'extrémité équerrée (11) du bâti (1), le réglage en profondeur de la course de la tige de poussée (3) et sa butée en fin de course ;5. Apparatus according to claims 1, 2, 3 and 4, characterized in that the push rod (3) of the drawing form (4) is externally threaded for screwing the adjustable stop (2) centered freely in the bore (1 2 ) of the squared end (1) of the frame (1), forming at the end, a flange (2 2 ) which cooperates in abutment against said end (1 1 ) at the end of travel or offset maximum of the hanger, a graduation (2 3 ) established externally on the bearing of said stop (2), allowing from the initial position of tangential support of the form (4) on the tube (T) in the clamping position, obtain, by the controlled positioning of the collar (2 2 ) relative to the squared end (1 1 ) of the frame (1), the depth adjustment of the stroke of the push rod (3) and its end stop race ; 6. Appareil selon les revendications 1, 2, 3, 4 et 5, caractérisé par le fait qu'une au moins des contre-formes (8) peut être fixée dans une lumière longitudinale (16) graduée du bâti (1), parallèle à la tige de poussée (3), pour permettre, eu égard à l'autre contre-forme, d'obtenir un écartement (X) correspondant au départ des deux branches parallèles dans le cas de réalisation d'un esse sur un tube (T) ;6. Apparatus according to claims 1, 2, 3, 4 and 5, characterized in that at least one of the counterforms (8) can be fixed in a longitudinal opening (1 6 ) graduated from the frame (1), parallel to the push rod (3), in order to allow, with regard to the other counter-form, to obtain a spacing (X) corresponding to the start of the two parallel branches in the case of making a loop on a tube (T); 7. Appareil selon les revendications 1, 2, 3, 4 et 5, caractérisé par le fait qu'en variante, les contre-formes (8) peuvent être déplacées dans des fentes graduées (1 10) en forme de T, établies dans l'épaisseur du bâti (1), pour autoriser leur réglage tant en déport qu'en écartement, lesdites contre-formes (8) pouvant être écartées symétriquement ou non par rapport à la tige de poussée (3) de la forme (4), pour l'obtention de chapeaux de gendarme à branches inégales ou égales ;7. Apparatus according to claims 1, 2, 3, 4 and 5, characterized in that as a variant, the counterforms (8) can be moved in graduated slots ( 1 10 ) in the form of T, established in the thickness of the frame (1), to allow their adjustment both in offset and in spacing, said counterforms (8) being able to be spread symmetrically or not relative to the push rod (3) of the form (4) , for obtaining gendarme hats with unequal or equal branches; 8. Appareil selon les revendications 1, 2, 3, 4, 5, 6 et 7, caractérisé par le fait que dans le cas de réalisation d'un esse formé de deux branches parallèles reliées par deux cintres, une des contre-formes (8) est déportée dans la lumière longitudinale (16) suivant l'écartement (X) des branches de l'axe à obtenir, tandis que le tube (T) est disposé en appui sur la creusure de l'autre contre-forme et maintenu en position de serrage par le galet (13) correspondant, l'effort de poussée de la forme (4) contrôlé par la butée (2) suivant l'écartement des branches à obtenir, autorisant la formation de l'esse8. Apparatus according to claims 1, 2, 3, 4, 5, 6 and 7, characterized in that in the case of making a esse formed of two parallel branches connected by two hangers, one of the counter-forms ( 8) is offset in the longitudinal lumen (1 6 ) along the spacing (X) of the branches of the axis to be obtained, while the tube (T) is placed in abutment on the recess of the other counterform and maintained in the clamping position by the corresponding roller (13), the pushing force of the form (4) controlled by the stop (2) according to the spacing of the branches to be obtained, authorizing the formation of the core 9. Appareil selon les revendications 1, 2, 3, 4, 5, 6 et 7, caractérisé par le fait que dans le cas de réalisation d'un chapeau de gendarme à branches égales ou inégales, les contre-formes (8) de même diamètre ou de diamètre différent, disposées ou non symétriquement par rapport à la tige de poussée (3), autorisent de par leurs creusures (81), l'appui du tube (T) maintenu en position de serrage par les galets (13) correspondants, tandis que l'effort de poussée de la forme (4), contrôlé par la butée (2), s'exerce sur ledit tube (T) serré, en assurant la formation du chapeau de gendarme.9. Apparatus according to claims 1, 2, 3, 4, 5, 6 and 7, characterized in that in the case of producing a gendarme hat with equal or unequal branches, the counter-forms (8) of same diameter or different diameter, arranged or not symmetrically with respect to the push rod (3), allow by their recesses (8 1 ), the support of the tube (T) maintained in the clamping position by the rollers (13 ) corresponding, while the pushing force of the form (4), controlled by the stop (2), is exerted on said tube (T) tight, ensuring the formation of the gendarme cap.
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 true EP0025002A1 (en) 1981-03-11
EP0025002B1 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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63171219A (en) * 1988-01-12 1988-07-15 Ogura:Kk Bend straightening machine
GB2231518A (en) * 1989-05-16 1990-11-21 Deritend Eng Ltd Bending a box makers rule.
EP0875308A2 (en) * 1997-04-01 1998-11-04 Claudio Bernardinis Automatic reinforcing rod and/or wire head and tail bending unit for bending machines and/or arc-welded steelmesh forming machines

Families Citing this family (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

Citations (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

Patent Citations (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 (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63171219A (en) * 1988-01-12 1988-07-15 Ogura:Kk Bend straightening machine
JPH066212B2 (en) * 1988-01-12 1994-01-26 株式会社オグラ Bending correction machine
GB2231518A (en) * 1989-05-16 1990-11-21 Deritend Eng Ltd Bending a box makers rule.
EP0398486A2 (en) * 1989-05-16 1990-11-22 Deritend Engineering Limited Box makers forms
EP0398486A3 (en) * 1989-05-16 1991-07-24 Deritend Engineering Limited Box makers forms
EP0875308A2 (en) * 1997-04-01 1998-11-04 Claudio Bernardinis Automatic reinforcing rod and/or wire head and tail bending unit for bending machines and/or arc-welded steelmesh forming machines
EP0875308A3 (en) * 1997-04-01 2002-01-16 Claudio Bernardinis Automatic reinforcing rod and/or wire head and tail bending unit for bending machines and/or arc-welded steelmesh forming machines

Also Published As

Publication number Publication date
DK367780A (en) 1981-03-04
EP0025002B1 (en) 1983-06-22
NO802568L (en) 1981-03-04
NO153324B (en) 1985-11-18
ATE3819T1 (en) 1983-07-15
DE3063896D1 (en) 1983-07-28
FR2464109A1 (en) 1981-03-06
FI802758A (en) 1981-03-04
NO153324C (en) 1986-02-26
FR2464109B1 (en) 1983-10-28

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