EP3009207A1 - Counterform for crossbow-type tube bender - Google Patents
Counterform for crossbow-type tube bender Download PDFInfo
- Publication number
- EP3009207A1 EP3009207A1 EP15189635.4A EP15189635A EP3009207A1 EP 3009207 A1 EP3009207 A1 EP 3009207A1 EP 15189635 A EP15189635 A EP 15189635A EP 3009207 A1 EP3009207 A1 EP 3009207A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crossbow
- tube
- face
- bending
- portions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 claims abstract description 33
- 241001272720 Medialuna californiensis Species 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/26—Stops
Definitions
- the present invention relates to a cross-form for a bending crossbow of a tube, substantially in the form of a block of which first and second opposite faces are intended to be placed either one or the other. contact of said tube, said first face having a first transverse groove of substantially semi-cylindrical shape adapted to fit a portion of said tube.
- Crossbows for bending a tube are conventionally composed of a half-moon bending form, and a transverse bar supporting a pair of generally identical counter-forms called to cooperate with the half-moon bending form.
- the pair of counter bending forms is pivotally mounted on the crossbar, so as to gradually follow the movement of each of the linear parts of the tube located on either side of the zone being bent.
- the pair of counter bending forms is pivotally mounted on the crossbar, so as to gradually follow the movement of each of the linear parts of the tube located on either side of the zone being bent.
- WO 2012/129345 also discloses an apparatus for bending a crossbow type tube having two counter-shaped blocks and having two opposite faces equipped with grooves whose profile is adapted to accommodate respectively two different diameters of tube.
- the present invention aims to overcome this drawback by proposing a bending form against providing a better contact surface with an already curved portion of a tube, said counter bending form having at least one face devoid of sharp edges, so as to avoiding the formation of weakening zones at the tube, such counter form being further designed in such a way as to allow the bending of tubes of different diameters.
- said second face comprises a second transverse groove having a projecting region adapted to provide a contact in at least three points with a curved portion of concave appearance said tube.
- said second groove has a first and a second portion, of substantially semi-frustoconical shape, joined to each other by their smallest respective side at a junction zone and located relative to one another. other such that two lines passing respectively through the junction zone and the long side of each of the first and second portions form between them an angle, said long sides extending respectively along two opposite edges of said second face.
- said angle is between 5 ° and 50 °.
- said first and second portions are symmetrical with respect to a plane perpendicular to said second face.
- the invention also provides that the edges formed between the lateral edges of said first and second portions and the second face of the counter form are rounded.
- each of the ridges formed at the long side of the first and second portions is rounded.
- the groove has a semi-cylindrical bottom and a convex upper face.
- said upper face may be curved in an arc of a radius of between 25mm and 55mm.
- an additional feature of the counter form according to the invention is further defined by the fact that the first groove is arranged to match different diameters of tubes.
- the present application also aims to protect a bending crossbow of a tube, characterized in that it comprises at least one against form as previously described.
- counterforms 1, 10 for crossbow 2 for bending a tube 3 are each substantially in the form of a block 4, 40 comprising an upper face 5, 50 and a lower face 6, 60 interconnected by a through hole 7, 70. It is intended for the passage of an axis of rotation 8 by means of which a counter-form 1, 10 is capable of being pivotally mounted on a crossbar 9 of the crossbow 2 of bending to cooperate with the form of bending 11 in half-moon of the latter (cf. Fig. 5 ).
- Each of the counterforms 1, 10 also comprises a first and a second opposite face 12, 13, 120, 130 intended to be placed either one in contact with a portion of the tube 3.
- the first face 12, 120 of the counterforms 1, 10 comprises a first transverse groove 14, 140 of substantially semi-cylindrical shape adapted to fit a portion, for example a linear portion, of the tube 3.
- the first transverse groove 14, 140 of the first face 12, 120 respective against forms 1, 10 is profiled such that it can suitably accommodate different diameters of tubes 3, for example 10 to 22 mm.
- the second face 13, 130 comprises a second transverse groove 15, 150 having a projecting region specifically adapted to provide contact at at least three points, or even continuous contact, with a portion 31 already curved, of concave shape, of a tube 3.
- the second groove 15 of the counter form 1 has a first and a second portion 16, 17, of substantially semi-frustoconical shape, joined together at their respective smaller sides, so as to form a junction zone 18. two portions thus together have an hourglass shape.
- first and second portions 16, 17 are furthermore symmetrical with respect to a plane perpendicular to the second face 13 and are located relative to each other in such a way that two straight lines D1, D2 passing respectively through the junction zone 18 and the long side 19, 20 of each of the first and second portions 16, 17 form between them an angle ⁇ , preferably between 5 ° and 50 °.
- the long sides 19, 20 of each of the first and second portions 16, 17 extend respectively along each of the lateral edges 21, 22 of the second face 13.
- edges 23, 24, 25, 26 formed between the lateral edges of said first and second portions 16, 17 and the second face 13 of the counter form 1 are advantageously rounded.
- each of the ridges 27, 28 formed at the long side 19, 20 of the first and second portions 16, 17 is rounded.
- Such a configuration is advantageous because the hourglass shape of the transverse groove 15 of the second face 13 of the counter form 1 not only allows to accept tubes of different diameters, for example from 10 to 22 mm, like the first groove 14 of the first face 12, but also to avoid the marking of the tube 3, given the total absence of sharp edges in contact with the bent portion considered the tube 3.
- the contact between the groove 15 and the bent portion of the tube 3 is increased from two to at least three contacts, the contact force is lowered, with consequent limited marking, or even the absence of marking of the tube 3.
- FIG. 3 and 4 has the same advantages. Indeed, against form 10 for crossbow 2 bending comprises on its second face 130 intended to come into contact with an already curved portion of a tube 3, a groove 150 which has a bottom 29 of semi-cylindrical shape and a upper face 30 of convex shape, preferably curved in an arc of a circle between 25mm and 55mm, which eliminates any protruding angle on the second face 130. Nevertheless, this configuration does not have the same character adaptability than that of the variant of the Figures 1 and 2 and requires, for each diameter of the tube to be worked, a counter form 10 whose groove 150 is specifically adapted.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
La présente invention concerne une contre forme (1) pour arbalète (2) de cintrage d'un tube (3), se présentant sensiblement sous la forme d'un pavé (4) dont une première et une seconde faces (12, 13) opposées sont destinées à être placées soit l'une soit l'autre au contact dudit tube (3), ladite première face (12) comportant une première gorge transversale (14) de forme sensiblement semi cylindrique apte à épouser une portion dudit tube (3), caractérisée en ce que ladite seconde face (13) comporte une seconde gorge transversale (15) présentant une région saillante adaptée pour ménager un contact en au moins trois points avec une portion incurvée (31) d'allure concave dudit tube (3).The present invention relates to a counter-form (1) for a crossbow (2) for bending a tube (3), substantially in the form of a block (4) of which a first and a second face (12, 13) opposed are intended to be placed either one in contact with said tube (3), said first face (12) having a first transverse groove (14) of substantially semi-cylindrical shape adapted to fit a portion of said tube (3). ), characterized in that said second face (13) comprises a second transverse groove (15) having a projecting region adapted to provide a contact at least three points with a curved portion (31) of concave shape of said tube (3) .
Description
La présente invention a pour objet une contre forme pour arbalète de cintrage d'un tube, se présentant sensiblement sous la forme d'un pavé dont une première et une seconde faces opposées sont destinées à être placées soit l'une soit l'autre au contact dudit tube, ladite première face comportant une première gorge transversale de forme sensiblement semi cylindrique apte à épouser une portion dudit tube.The present invention relates to a cross-form for a bending crossbow of a tube, substantially in the form of a block of which first and second opposite faces are intended to be placed either one or the other. contact of said tube, said first face having a first transverse groove of substantially semi-cylindrical shape adapted to fit a portion of said tube.
Les arbalètes de cintrage d'un tube sont classiquement composés d'une forme de cintrage en demi-lune, et d'une barre transversale supportant une paire de contre formes, généralement identiques appelées à coopérer avec la forme de cintrage en demi-lune.Crossbows for bending a tube are conventionally composed of a half-moon bending form, and a transverse bar supporting a pair of generally identical counter-forms called to cooperate with the half-moon bending form.
Habituellement, la paire de contre formes de cintrage est montée pivotante sur la barre transversale, de manière à suivre progressivement le déplacement de chacune des parties linéaires du tube situées de part et d'autre de la zone en cours de cintrage. Il existe actuellement sur le marché différents modèles de contre formes pour arbalètes de cintrage, adaptés à différentes applications et configurations.Usually, the pair of counter bending forms is pivotally mounted on the crossbar, so as to gradually follow the movement of each of the linear parts of the tube located on either side of the zone being bent. There are currently on the market various models of counterforms for crossbow bending, suitable for different applications and configurations.
On connait notamment du document
Le document
Du fait de leur structure, les contre formes de ce type présentent des arêtes extérieures vives qui peuvent parfois être à l'origine de zones de fragilisation ou de détériorations intempestives du tube.Because of their structure, against forms of this type have sharp outer edges that can sometimes be the source of weakening zones or inadvertent deterioration of the tube.
En effet, sur le terrain, l'utilisateur d'une arbalète de cintrage peut être amené à effectuer deux cintrages successifs, dans un sens opposé, sur un même tube, notamment lorsque ce tube doit enjamber une ou plusieurs conduites disposées horizontalement, c'est-à-dire pour réaliser une configuration communément qualifiée de « chapeau de gendarme » ou de « baïonnette ».Indeed, in the field, the user of a bending crossbow can be made to perform two successive bends, in the opposite direction, on the same tube, especially when this tube must span one or more pipes arranged horizontally, it is that is to say to achieve a configuration commonly referred to as "cocked hat" or "bayonet".
Lors d'une telle opération, pour effectuer le second cintrage du tube, une des deux contre formes de cintrage est placée au contact de la portion incurvée du tube issue du premier cintrage. Il a été observé que les arêtes vives de la contre forme, sur lesquelles le tube est en appui, génèrent deux légers renfoncements à la surface de ce dernier. Ces renfoncements sont non seulement inesthétiques, mais peuvent à terme causer des lésions importantes au niveau du tube.During such an operation, to perform the second bending of the tube, one of the two bending forms against is placed in contact with the curved portion of the tube from the first bending. It has been observed that the sharp edges of the counter form, on which the tube is supported, generate two slight recesses on the surface of the latter. These recesses are not only unsightly, but can eventually cause significant damage to the tube.
La présente invention vise à pallier cet inconvénient en proposant une contre forme de cintrage offrant une meilleure surface de contact avec une portion déjà cintrée d'un tube, ladite contre forme de cintrage présentant au moins une face dépourvue d'arêtes vives, de sorte à éviter la formation de zones de fragilisation au niveau du tube, une telle contre forme étant en outre conçue de manière telle qu'elle permet le cintrage de tubes de différents diamètres.The present invention aims to overcome this drawback by proposing a bending form against providing a better contact surface with an already curved portion of a tube, said counter bending form having at least one face devoid of sharp edges, so as to avoiding the formation of weakening zones at the tube, such counter form being further designed in such a way as to allow the bending of tubes of different diameters.
A cet effet, elle a pour objet une contre forme du genre indiqué en préambule, caractérisée en ce ladite seconde face comporte une seconde gorge transversale présentant une région saillante adaptée pour ménager un contact en au moins trois points avec une portion incurvée d'allure concave dudit tube.For this purpose, it relates to a counter shape of the kind indicated in the preamble, characterized in that said second face comprises a second transverse groove having a projecting region adapted to provide a contact in at least three points with a curved portion of concave appearance said tube.
Conformément à une variante de réalisation, ladite seconde gorge présente une première et une seconde portions, de forme sensiblement semi tronconique, réunies entre elles par leur plus petit côté respectif au niveau d'une zone de jonction et situées l'une par rapport à l'autre de manière telle que deux droites passant respectivement par la zone de jonction et le grand côté de chacune des première et seconde portions forment entre elles un angle, lesdits grands côtés s'étendant respectivement le long de deux bords opposés de ladite seconde face.According to an alternative embodiment, said second groove has a first and a second portion, of substantially semi-frustoconical shape, joined to each other by their smallest respective side at a junction zone and located relative to one another. other such that two lines passing respectively through the junction zone and the long side of each of the first and second portions form between them an angle, said long sides extending respectively along two opposite edges of said second face.
Préférentiellement, ledit angle est compris entre 5° et 50°.Preferably, said angle is between 5 ° and 50 °.
Selon une caractéristique de l'invention, lesdites première et seconde portions sont symétriques par rapport à un plan perpendiculaire à ladite seconde face.According to a feature of the invention, said first and second portions are symmetrical with respect to a plane perpendicular to said second face.
L'invention prévoit également que les arêtes formées entre les bords latéraux desdites première et seconde portions et la seconde face de la contre forme sont arrondies.The invention also provides that the edges formed between the lateral edges of said first and second portions and the second face of the counter form are rounded.
De même, chacune des arêtes formées au niveau du grand côté des première et seconde portions est arrondie.Likewise, each of the ridges formed at the long side of the first and second portions is rounded.
Conformément à une autre variante de réalisation de l'invention, la gorge présente un fond d'allure semi cylindrique et une face supérieure d'allure convexe.According to another embodiment of the invention, the groove has a semi-cylindrical bottom and a convex upper face.
Dans ce cas, ladite face supérieure peut être incurvée selon un arc de cercle d'un rayon compris entre 25mm et 55mm.In this case, said upper face may be curved in an arc of a radius of between 25mm and 55mm.
Par ailleurs, une caractéristique additionnelle de la contre forme selon l'invention est encore définie par le fait que la première gorge est agencée pour épouser différents diamètres de tubes.Furthermore, an additional feature of the counter form according to the invention is further defined by the fact that the first groove is arranged to match different diameters of tubes.
La présente demande vise également à protéger une arbalète de cintrage d'un tube, caractérisée en ce qu'elle comporte au moins une contre forme telle que précédemment décrite.The present application also aims to protect a bending crossbow of a tube, characterized in that it comprises at least one against form as previously described.
La présente invention sera mieux comprise à la lecture de la description d'exemples de réalisation faite en référence aux figures annexées, fournies à titre d'exemples non limitatifs, et dans lesquelles :
- La
figure 1 illustre une vue en perspective d'une variante de réalisation d'une contre forme pour arbalète de cintrage d'un tube selon l'invention, - La
figure 2 représente une vue de profil de la contre forme de lafigure 1 , - La
figure 3 illustre une vue en perspective d'une autre variante de réalisation d'une contre forme pour arbalète de cintrage d'un tube selon l'invention, - La
figure 4 représente une vue de profil de la contre forme de lafigure 3 , et - La
figure 5 illustre une vue d'une arbalète de cintrage d'un tube équipée d'une paire de contre formes de lafigure 1 .
- The
figure 1 illustrates a perspective view of an alternative embodiment of a crossbow shape for bending crossbow of a tube according to the invention, - The
figure 2 represents a profile view of the counter shape of thefigure 1 , - The
figure 3 illustrates a perspective view of another alternative embodiment of a counter-shape for crossbow bending a tube according to the invention, - The
figure 4 represents a profile view of the counter shape of thefigure 3 , and - The
figure 5 illustrates a view of a bending crossbow of a tube equipped with a pair of counter forms of thefigure 1 .
En référence aux figures, les contre formes 1, 10 pour arbalète 2 de cintrage d'un tube 3, se présentent chacune sensiblement sous la forme d'un pavé 4, 40 comprenant une face supérieure 5, 50 et une face inférieure 6, 60 reliées entre elles par un orifice traversant 7, 70. Celui-ci est destiné au passage d'un axe de rotation 8 au moyen duquel une contre forme 1, 10 est susceptible d'être montée pivotante sur une barre transversale 9 de l'arbalète 2 de cintrage pour coopérer avec la forme de cintrage 11 en demi-lune de cette dernière (cf.
Chacune des contre formes 1, 10 comporte également une première et une seconde faces opposées 12, 13, 120, 130 destinées à être placées soit l'une soit l'autre au contact d'une portion du tube 3.Each of the
De manière classique, la première face 12, 120 des contre formes 1, 10 comporte une première gorge transversale 14, 140 de forme sensiblement semi cylindrique apte à épouser une portion, par exemple linéaire, du tube 3. De préférence, la première gorge transversale 14, 140 de la première face 12, 120 des contre formes 1, 10 respectives est profilée de manière telle qu'elle peut loger convenablement différents diamètres de tubes 3, par exemple de 10 à 22 mm.In a conventional manner, the
Ainsi, pour cintrer, les uns après les autres, des tubes 3 de diamètres différents, il n'est pas systématiquement nécessaire de procéder à un remplacement d'une contre forme 1, 10 par une autre contre forme 1, 10 se différenciant de la précédente par son rayon de courbure.Thus, to bend, one after the other,
La seconde face 13, 130 comporte une seconde gorge transversale 15, 150 présentant une région saillante spécifiquement adaptée pour ménager un contact en au moins trois points, voire un contact continu, avec une portion 31 déjà cintrée, d'allure concave, d'un tube 3.The
Plus particulièrement, dans la variante de réalisation illustrée aux
Dans la variante de réalisation illustrée, les première et seconde portions 16, 17 sont en outre symétriques par rapport à un plan perpendiculaire à la seconde face 13 et sont situées l'une par rapport à l'autre de manière telle que deux droites D1, D2 passant respectivement par la zone de jonction 18 et le grand côté 19, 20 de chacune des première et seconde portions 16, 17 forment entre elles un angle α, préférentiellement compris entre 5° et 50°.In the variant embodiment illustrated, the first and
Par ailleurs, les grands côtés 19, 20 de chacune des première et seconde portions 16, 17 s'étendent respectivement le long de chacun des bords latéraux 21, 22 de la seconde face 13.Moreover, the
En outre, les arêtes 23, 24, 25, 26 formées entre les bords latéraux desdites première et seconde portions 16, 17 et la seconde face 13 de la contre forme 1 sont avantageusement arrondies.In addition, the
De même, chacune des arêtes 27, 28 formées au niveau du grand côté 19, 20 des première et seconde portions 16, 17 est arrondie.Likewise, each of the
Une telle configuration est avantageuse car la forme en sablier de la gorge transversale 15 de la seconde face 13 de la contre forme 1 permet non seulement d'accepter des tubes de différents diamètres, par exemple de 10 à 22mm, à l'instar de la première gorge 14 de la première face 12, mais également d'éviter le marquage du tube 3, étant donné l'absence totale d'arêtes vives au contact de la portion cintrée considérée du tube 3. En outre, du fait que le contact entre la gorge 15 et la portion cintrée du tube 3 est porté de deux à au moins trois contacts, l'effort de contact est abaissé, avec pour conséquence un marquage limité, voire l'absence de marquage du tube 3.Such a configuration is advantageous because the hourglass shape of the
La variante de réalisation illustrée aux
Bien entendu, de nombreuses modifications peuvent être apportées aux exemples décrits ci-dessus sans sortir du cadre de la présente invention.Of course, many modifications can be made to the examples described above without departing from the scope of the present invention.
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1459790A FR3026971B1 (en) | 2014-10-13 | 2014-10-13 | COUNTER FOR SHAFT BENDING A TUBE |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3009207A1 true EP3009207A1 (en) | 2016-04-20 |
EP3009207C0 EP3009207C0 (en) | 2023-07-05 |
EP3009207B1 EP3009207B1 (en) | 2023-07-05 |
Family
ID=51987389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15189635.4A Active EP3009207B1 (en) | 2014-10-13 | 2015-10-13 | Counterform for crossbow-type tube bender |
Country Status (2)
Country | Link |
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EP (1) | EP3009207B1 (en) |
FR (1) | FR3026971B1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR641531A (en) * | 1927-09-27 | 1928-08-06 | Cold bending machine for metal pipes | |
FR1124191A (en) * | 1955-03-29 | 1956-10-05 | Improvements made to bending machines | |
US3112787A (en) * | 1960-03-03 | 1963-12-03 | Dard Lucien | Apparatus for bending tubes, bars and metal sections |
FR1592154A (en) * | 1968-10-28 | 1970-05-11 | ||
FR2626505A1 (en) | 1988-02-03 | 1989-08-04 | Foell Remswerk | APPARATUS FOR BENDING TUBES |
WO2012129345A1 (en) | 2011-03-21 | 2012-09-27 | Irwin Industrial Tool Company | Tube and pipe benders and methods of bending same |
-
2014
- 2014-10-13 FR FR1459790A patent/FR3026971B1/en active Active
-
2015
- 2015-10-13 EP EP15189635.4A patent/EP3009207B1/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR641531A (en) * | 1927-09-27 | 1928-08-06 | Cold bending machine for metal pipes | |
FR1124191A (en) * | 1955-03-29 | 1956-10-05 | Improvements made to bending machines | |
US3112787A (en) * | 1960-03-03 | 1963-12-03 | Dard Lucien | Apparatus for bending tubes, bars and metal sections |
FR1592154A (en) * | 1968-10-28 | 1970-05-11 | ||
FR2626505A1 (en) | 1988-02-03 | 1989-08-04 | Foell Remswerk | APPARATUS FOR BENDING TUBES |
WO2012129345A1 (en) | 2011-03-21 | 2012-09-27 | Irwin Industrial Tool Company | Tube and pipe benders and methods of bending same |
Also Published As
Publication number | Publication date |
---|---|
EP3009207C0 (en) | 2023-07-05 |
FR3026971A1 (en) | 2016-04-15 |
EP3009207B1 (en) | 2023-07-05 |
FR3026971B1 (en) | 2016-12-23 |
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