EP3313593B1 - Device for bending profile members comprising tools for bending profile members and a tool for cutting said profile members - Google Patents

Device for bending profile members comprising tools for bending profile members and a tool for cutting said profile members Download PDF

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Publication number
EP3313593B1
EP3313593B1 EP16741654.4A EP16741654A EP3313593B1 EP 3313593 B1 EP3313593 B1 EP 3313593B1 EP 16741654 A EP16741654 A EP 16741654A EP 3313593 B1 EP3313593 B1 EP 3313593B1
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EP
European Patent Office
Prior art keywords
cutting member
cutting
bending
hold
jaw
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EP16741654.4A
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German (de)
French (fr)
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EP3313593A1 (en
Inventor
Philippe Jaubert
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ADMC Holding LLC
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ADMC Holding LLC
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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
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B26D3/161—Cutting rods or tubes transversely for obtaining more than one product at a time

Definitions

  • the invention relates to a device for bending profiles such as tubes according to the preamble of claim 1, comprising, on the one hand, tools for bending profiles, and on the other hand, a cutting tool for these profiles after bending (s).
  • the current bending devices are adapted to move the profiles along a longitudinal axis (X) and comprise a bending head mounted on means for rotating said bending head about a bending axis. (Z), provided, on the one hand, with one or more bending stage (s) each equipped with a bending form / clamping jaw assembly, and secondly, with a stage of cutting of the curved sections distinct from the bending stages.
  • the present invention aims to overcome this drawback and its main purpose is to provide a bending device designed to reduce the time of the final cutting step of this section, and to achieve, in this final step, a clean cut and frank profile.
  • each bending (s) / cutting stage is therefore equipped with a pre-cutting member and a cutting member, and designed to enable these two members to be actuated successively so as to produce a primer. cutting in a specific area of the profile and then the total cutting of this profile.
  • the displacement means of each pre-cutting member are adapted to move the latter in a circular path centered on a point on the transverse axis (Y).
  • Such a trajectory leads, in fact, during the pre-cut, to remove the maximum of material in the vicinity of the generatrix profiles extending in the plane (X, Y), that is to say at the level of the zone "attacked” then by the cutting member.
  • the guide duct of said pre-cutting member is delimited, according to the transverse axis (Y), by a convex wall forming a span guiding said pre-cutting member, pierced with a slot extending in the plane (Y, Z) for guiding the cutting member.
  • the cam advantageously consists, according to the invention, of a groove cam adapted to extend laterally with respect to the cutting element, between the support block and the blank jaw, the connecting rod system comprising a crank adapted to transform the translation movement of the roller guided by the grooved cam in a rotational movement of the pre-cut member.
  • the pre-cutting member is associated with displacement means comprising an actuator adapted to generate the movements of said pre-cut member.
  • actuator control means are adapted to control a displacement of the pre-cut member in a forward path, in order to achieve the pre-cut, then to control the movement along the return path, after actuation of the cutting member.
  • the actuator advantageously consists according to the invention in a fluidic jack coupled respectively to the support means of the cutting member and the clamp jaw, and adapted, firstly for its deployment causes a displacement according to the forward path of the pre-cut member, and secondly to exert a stop force against the clamp jaw, first in its deployed state, and secondly during its retraction and its resulting deployment displacements of the support means of the cutting member relative to the jaw clamp, generating section cutting.
  • the bending devices according to the invention shown by way of examples respectively to Figures 1 to 9 and at the Figure10 consist of machines for bending a section carried by displacement means (not shown) able to move it along a horizontal axis of displacement (X), and comprising, for example, either a clamp associated with drive means the latter along the longitudinal axis (X), a 6-axis robot of the type described in the patent FR2914203 .
  • the bending head is described in its initial loading position of a profile in which the clamping impressions of the bending form and the jaw clamps. blanks are oriented on the longitudinal axis (X) of movement of the profiles, and the transverse axis (Y) of displacement of the clamp jaw is orthogonal to this longitudinal axis (X).
  • the bending head comprises, firstly, a strip 1 having a longitudinal groove 2 for supporting and guiding the profiles, carried by means (not shown) of displacement of the said strip along a longitudinal axis parallel to the axis (X) and along a horizontal transverse axis (Y) orthogonal to the plane (X, Z), (the axis Z representing the axis of bending consisting of the axis of rotation of the bending head orthogonal to the X axis).
  • This bending head also comprises an erase-fold 3 with a guide groove, intended to cooperate with the strip 1 for the support and guidance of the profiles.
  • This erase-fold 3 is attached to the bending form of this bending head which comprises, firstly, a cylindrical roller 4 secured to a circular plate 5 adapted to be mounted on means (not shown) for rotating drive said cylindrical roller 4 about the bending axis (Z).
  • This cylindrical roller 4 has a peripheral groove 7 and has a notch 6 of L-shaped section delimited by two perpendicular walls and extending at the level of the plate 5.
  • a groove 8 extending along an axis parallel to the axis (Z) is formed in the wall of the notch 6 parallel to the axis (X), said groove housing the amount of a rail 9 T-shaped
  • the cavity 11 forms, in addition, a 90 ° elbow with a branch 11a centered on the longitudinal axis (X) and a branch 11b perpendicular to said longitudinal axis (X).
  • clamping jaw 10 is pierced with a through slot 13 extending between the end faces 10a, 10c so as to open, on the one hand, in the branch 11a of the cavity 11, and on the other side. on the other hand in the groove 7 of the cylindrical roller 4.
  • the end face 10a is pierced with four blind holes, said centering holes, such as 14, each formed in the area of one of the peaks of this end face 10a.
  • the bending head according to the invention also comprises a clamping jaw, said clamp jaw, of the same shape and dimensions as the clamping jaw 10.
  • this clamp jaw 15 has a front face 15a in which is formed a clamping fingerprint 16 conjugate of the cavity 11 and thus having the shape of a bend formed of two perpendicular branches 16a, 16b.
  • this jaw clamp 15 is pierced with a through slot 17 extending between its end faces so as to open into the branch 16a of the cavity 16, in the continuity of the slot 13 formed in the counter- clamping jaws 10.
  • this jaw clamp 15 comprises four centering pins such as 18 adapted to be housed in the centering orifices 14 of the jaw 10 during the coupling of these two elements.
  • This jaw clamp 15 is associated with a support block 19 of substantially cubic shape adapted to be mounted on means (not shown) for moving the jaw clamp assembly 15 / support block 19 along a so-called transverse axis (Y ) relative to the bending form 10.
  • this support block 19 comprises, opposite the clamp jaw 15, a front face in which is formed a rib adapted to house a rail 20 hooking of said support block.
  • the bending device further comprises a carriage 25, which is attached to the support block 19, between the latter and the holder jaw 15, on the one hand, equipped with ball bushes such as 26 arranged to allow said carriage to slide. along the rods 21-23, and secondly, on which is secured a cutting blade 27 having a tip-shaped end portion oriented on the plane (X, Y), embedded in the front face of the carriage 25 opposed to the support block 19 so as to extend orthogonally relative thereto.
  • This bending device comprises, moreover, three hydraulic stop cylinders 28-30 disposed between the clamping jaw 15 and the support block 19, comprising a jack rod 31 having a threaded end 31a for securing said rod with the jaw clamp 15, and an opposite end forming a piston 32 housed in a cylinder chamber 33 arranged longitudinally in the support block 19.
  • the three chambers 33 are, furthermore, fed from connection ports 34-36 by conduits such as 37 connecting, on the one hand, said orifices, and on the other hand, the three chambers 33.
  • the bending device also comprises a cutting cylinder 38 adapted to urge the carriage 25 so as to deploy, to exert on said carriage a force tending to take it off the support block 19.
  • this cutting cylinder 38 comprises a rod 39 provided with an end forming a piston 40 housed in a cylinder chamber 41 arranged longitudinally in the support block 19, so as to open opposite the carriage 25, and fed from a connection port 42.
  • the three stop cylinders 28-30 and the cutting cylinder 38 are connected to form a closed hydraulic circuit incorporating a distributor 43 and a unidirectional flow restrictor 44.
  • Such a closed hydraulic circuit is adapted, in the first place, in a first position of the distributor 43, to maintain, under fluid pressure, the stop cylinders 28-30 in their deployed position, in particular making it possible to bend in the usual manner a section maintained enclosed between the clamping jaw 10 and the clamp jaw 15.
  • a switching of the distributor 43 made to start the cutting operation leads, on the other hand, to allow the emptying of the chamber 33 of each of the stop cylinders 28-30, during the displacement of the support block 19 generated by the means moving the jaw clamp assembly 15 / support block 19 along a so-called transverse axis (Y) relative to the bending form 4, 10.
  • the flow rate of the fluid during this emptying is furthermore regulated by the flow restrictor 44, so that the holding jaw 15 is held pressed against the clamping jaw 10 with a pressing force determined by this reducing gear. flow 44, thus conferring on the said blank jaw a blank press function for cutting the profile by means of the cutting blade 27.
  • the chamber 47 is delimited posteriorly by a wall 48 provided with a convex front face 48a forming a guide surface of the pre-cutting member 45, said wall being pierced with a slot 49 extending in the plane (Y, Z) for guiding the cutting member 27.
  • the drive pinion 54 has a V-shaped notch 54a inside which is positioned a fixed stop 57 also having the shape of a V.
  • All of these actuating means and in particular the angle at the apex of this notch 54a, the shape of the abutment 57 and the arrangement of the jack 50, are adapted so that the rotations of the driving pinion 54, generated by the actuation of the cylinder 50, cause displacements of the pre-cutting member 45 between its high position in the retracted state of the jack 50, and its low position in the deployed state of the jack 50.
  • the following step controlled once the section has been cut, consists in controlling the recoil of the support block 19, during which the holding jaw 15 is held in abutment against the clamping jaw 10 by the jack 50 fed in such a way to deploy due to said recoil of the support block 19.
  • the distributor 43 is switched again so that the initial retraction of the support block 19, performed with the clamp jaw 15 held in abutment against the clamping jaw 10 by the jack 50, leads to a relative approximation of the carriage 25 and the support block and therefore a retraction of the cutting blade 27.
  • the last step consists in controlling a supply of the jack 50 adapted to cause the retraction of said jack, and therefore to cause the displacement of the pre-cutting member 45 towards its initial high position shown in FIG. figure 9a .
  • the jaw clamp 61 comprises, as the previous one, a front face in which is formed a clamping impression 62 into which a slot 63 communicating with a guide chamber of a pre-cutting member (not shown in FIG. the figure 10 ).
  • the blank jaw 61 is secured to a carriage 64, in the example shown in the form of a plate, the movements of which are adapted to allow said blanking jaw to be brought into either a clamping position contiguous to the bending form 10, or in an open position spaced from this bending form.
  • the cutting member 66 consists of a cutting blade similar to that described above, carried by a support block 65 associated with drive means of said support block able to move it along the transverse axis ( Y) along the carriage 64, between an active cutting position of a profile housed in the indentations 11, 62 of the pair of clamp jaws 61 / bending form 10, and a passive bending position, in which said cutting blade is retracted recessed from said fingerprints.
  • these drive means of the support block 65 consist of a ball screw 70 integral with said driven support block, by means of a transmission formed of two pinions 68, 69, by an electric motor 67.
  • the groove of the groove cam consists of two parallel end sections 73, 74 extending along axes (y) and offset relative to each other along an axis (z), connected by an inclined section 73 determining the amplitude of the rotation of the crank 77.
  • the two embodiments of the invention described above therefore provide bending devices designed to reduce the time of the final cutting step of this section, and to achieve, in this final step, a clean cut and frank profile.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Description

L'invention concerne un dispositif de cintrage de profilés tels que des tubes selon le préambule de la revendication 1, comportant, d'une part, des outils de cintrage des profilés, et d'autre part, un outil de découpe de ces profilés après cintrage(s).The invention relates to a device for bending profiles such as tubes according to the preamble of claim 1, comprising, on the one hand, tools for bending profiles, and on the other hand, a cutting tool for these profiles after bending (s).

De façon usuelle, les dispositifs de cintrage actuels sont adaptés pour déplacer les profilés selon un axe longitudinal (X) et comportent une tête de cintrage montée sur des moyens d'entraînement en rotation de la dite tête de cintrage autour d'un axe de cintrage (Z), dotée, d'une part, d'un ou plusieurs étage(s) de cintrage équipé(s) chacun d'un ensemble forme de cintrage /mors de serrage, et d'autre part, d'un étage de découpe des profilés cintrés distinct des étages de cintrage.In the usual manner, the current bending devices are adapted to move the profiles along a longitudinal axis (X) and comprise a bending head mounted on means for rotating said bending head about a bending axis. (Z), provided, on the one hand, with one or more bending stage (s) each equipped with a bending form / clamping jaw assembly, and secondly, with a stage of cutting of the curved sections distinct from the bending stages.

De façon usuelle, en outre, chaque étage de cintrage comporte, en vue de réaliser les opérations de cintrage :

  • ▪ au moins une forme de cintrage axée sur l'axe de cintrage (Z), dotée d'une gorge périphérique d'enroulement du profilé s'étendant dans la continuité d'une empreinte destinée au serrage du dit profilé,
  • ▪ associé à chaque forme de cintrage, un mors de serrage comportant une empreinte de serrage du profilé complémentaire de l'empreinte de la dite forme de cintrage,
  • ▪ des moyens de déplacement de chaque mors de serrage selon un axe dit transversal (Y) relativement à la forme de cintrage associée, entre une position de serrage accolée à la dite forme de cintrage et une position ouverte écartée de cette forme de cintrage.
In the usual way, moreover, each bending stage comprises, in order to carry out the bending operations:
  • At least one form of bending centered on the bending axis (Z), provided with a peripheral groove for winding the profile extending in the continuity of an impression for clamping said profile,
  • Associated with each form of bending, a clamping jaw comprising a clamping fingerprint of the profile complementary to the impression of said bending form,
  • ▪ Means for moving each clamping jaw along a so-called transverse axis (Y) relative to the associated bending shape, between a clamping position contiguous to said bending form and an open position spaced from this bending form.

Un des inconvénients de ces dispositifs de cintrage résulte du fait que les étages de cintrage et l'étage de coupe sont distincts, de sorte que les opérations de coupe nécessitent de transférer les profilés d'un étage de cintrage vers l'étage de coupe.One of the drawbacks of these bending devices results from the fact that the bending stages and the cutting stage are distinct, so that the cutting operations require the profiles of a bending stage to be transferred to the cutting stage.

Or, cette solution va notamment à l'encontre des objectifs recherchés lors de la conception de tels dispositifs de cintrage qui visent à optimiser le temps d'un cycle complet d'usinage d'un profilé.However, this solution goes against the objectives sought during the design of such bending devices which aim to optimize the time of a complete cycle of machining a profile.

En vue de pallier cet inconvénient, une solution notamment décrite dans le brevet EP 1 591 175 a consisté à réaliser un dispositif de cintrage comportant :

  • ▪ au moins un mors de serrage, dit mors serre-flan, percé d'une lumière traversante débouchant par une fente dans l'empreinte du dit mors de serrage,
  • ▪ associée à chaque mors serre-flan, une forme de cintrage percée d'une lumière traversante débouchant par une fente dans l'empreinte de la dite forme de cintrage, et ménagée de façon à s'étendre dans la continuité de la lumière traversante du dit mors serre-flan,
  • ▪ un organe de coupe associé à chaque paire mors serre-flan/forme de cintrage, comportant une extrémité de coupe formant au moins une pointe de coupe s'étendant dans le plan (X, Y),
  • ▪ des moyens de déplacement de l'organe de coupe selon l'axe transversal (Y) entre une position active de coupe d'un profilé logé dans les empreintes de la paire mors serre-flan/forme de cintrage associée, et une position passive, dite position de cintrage, dans laquelle le dit organe de coupe est escamoté en retrait par rapport aux dites empreintes.
In order to overcome this drawback, a solution notably described in the patent EP 1,591,175 has consisted in producing a bending device comprising:
  • ▪ at least one clamping jaw, said clamp jaw, pierced with a through opening through a slot in the impression of said clamping jaw,
  • ▪ associated with each blank jaw, a form of bending pierced by a through opening through a slot in the footprint of said bending form, and arranged to extend in the continuity of the through light of said bit clamp,
  • A cutting member associated with each pair of jaw jaws / bending form, comprising a cutting end forming at least one cutting tip extending in the plane (X, Y),
  • ▪ means for moving the cutting member along the transverse axis (Y) between an active cutting position of a profile housed in the fingerprints of the jaw pair / associated bending form, and a passive position , said bending position, wherein said cutting member is retracted recessed relative to said fingerprints.

Cette solution conduit effectivement à optimiser le temps d'un cycle complet d'usinage d'un profilé, mais il s'avère, par contre, que l'opération de découpe conduit fréquemment à « déchirer » certaines zones de la découpe. De ce fait, il est fréquemment obligatoire de procéder à un usinage supplémentaire de l'extrémité découpée du profilé, en vue de l'obtention d'une coupe nette et franche, qui annihile tout le bénéfice résultant de l'optimisation du temps de cycle cintrage(s)/découpe.This solution actually leads to optimize the time of a complete machining cycle of a profile, but it turns out, on the other hand, that the cutting operation frequently leads to "tearing" certain areas of the cut. Therefore, it is frequently mandatory to perform additional machining of the cut end of the profile, to obtain a clear and clean cut, which annihilates all the benefit resulting from the optimization of the cycle time bending (s) / cut.

La présente invention vise à pallier cet inconvénient et a pour objectif essentiel de fournir un dispositif de cintrage conçu de façon à réduire le temps de l'étape finale de coupe de ce profilé, et à réaliser, lors de cette étape finale, une coupe nette et franche du profilé.The present invention aims to overcome this drawback and its main purpose is to provide a bending device designed to reduce the time of the final cutting step of this section, and to achieve, in this final step, a clean cut and frank profile.

A cet effet, l'invention vise un dispositif de cintrage du type décrit dans le préambule ci-dessus, comprenant, en outre, associé à chaque paire mors serre-flan/forme de cintrage, un second organe de coupe, dit organe de pré-coupe, adapté pour être actionné avant l'organe de coupe, et présentant une extrémité de coupe formant au moins une pointe de coupe, et des moyens de déplacement de cet organe de pré-coupe dans le plan (Y, Z) :

  • entre deux positions dans chacune desquelles le dit organe de pré-coupe dégage l'accès à la fente débouchant dans l'empreinte du mors serre-flan,
  • selon une trajectoire adaptée pour que chaque pointe de coupe pénètre dans l'empreinte du mors serre-flan au travers de la fente, d'une profondeur adaptée pour réaliser une amorce de découpe du profilé au moins au voisinage de la génératrice de ce dernier s'étendant dans le plan (X, Y),
    • ▪ le mors serre-flan comportant, communiquant avec l'empreinte du dit mors serre-flan par la fente débouchant dans cette dernière, un conduit adapté pour assurer le guidage de l'organe de pré-coupe lors du déplacement de ce dernier,
    • ▪ et les moyens de déplacement de l'organe de coupe étant adaptés pour déterminer une position de cintrage dans laquelle le dit organe de coupe est escamoté en retrait du conduit de guidage de l'organe de pré-coupe.
For this purpose, the invention is directed to a bending device of the type described in the preamble above, further comprising, associated with each pair of jaw-jaws / bending form, a second cutting member, said mowing member. -coupe, adapted to be actuated before the cutting member, and having a cutting end forming at least one cutting tip, and moving means of this pre-cutting member in the plane (Y, Z):
  • between two positions in each of which said pre-cut member releases access to the slot opening into the impression of the clamp jaw,
  • in a path adapted so that each cutting tip enters the impression of the jaw clamp through the slot, a depth adapted to achieve a cutting edge of the profile at least in the vicinity of the generator of the latter extending in the plane (X, Y),
    • ▪ the clamping jaw comprising, communicating with the impression of said jaw clamp by the slot opening into the latter, a conduit adapted to guide the pre-cut member during the displacement of the latter,
    • ▪ and the displacement means of the cutting member being adapted to determine a bending position in which said cutting member is retracted back from the guide duct of the pre-cut member.

Selon l'invention, chaque étage de cintrage(s)/découpe est donc équipé d'un organe de pré-coupe et d'un organe de coupe, et conçu pour permettre d'actionner successivement ces deux organes de façon à réaliser une amorce de découpe dans une zone spécifique du profilé puis la découpe totale de ce profilé.According to the invention, each bending (s) / cutting stage is therefore equipped with a pre-cutting member and a cutting member, and designed to enable these two members to be actuated successively so as to produce a primer. cutting in a specific area of the profile and then the total cutting of this profile.

Dans la pratique, une telle action combinée de pré-coupe et de découpe conduit, moyennant une faible augmentation du temps de cycle correspondant au temps d'exécution de la pré-coupe, à réaliser une découpe franche et nette des profilés ne nécessitant aucun usinage ultérieur.In practice, such a combined action of pre-cutting and cutting leads, with a small increase in the cycle time corresponding to the pre-cutting execution time, to achieve a clean and sharp cut profiles requiring no machining ulterior.

Selon un mode de réalisation avantageux de l'invention, les moyens de déplacement de chaque organe de pré-coupe sont adaptés pour déplacer ce dernier selon une trajectoire circulaire centrée sur un point situé sur l'axe transversal (Y).According to an advantageous embodiment of the invention, the displacement means of each pre-cutting member are adapted to move the latter in a circular path centered on a point on the transverse axis (Y).

Une telle trajectoire conduit, en effet, lors de la pré-coupe, à retirer la maximum de matière au voisinage de la génératrice des profilés s'étendant dans le plan (X, Y), c'est-à-dire au niveau de la zone « attaquée » ensuite par l'organe de coupe.Such a trajectory leads, in fact, during the pre-cut, to remove the maximum of material in the vicinity of the generatrix profiles extending in the plane (X, Y), that is to say at the level of the zone "attacked" then by the cutting member.

De plus, selon un mode de réalisation avantageux de l'invention, afin d'assurer le guidage de l'organe de pré-coupe le long de cette trajectoire circulaire, le conduit de guidage du dit organe de pré-coupe est délimité, selon l'axe transversal (Y), par une paroi convexe formant une portée de guidage du dit organe de pré-coupe, percée d'une fente s'étendant dans le plan (Y, Z), de guidage de l'organe de coupe.In addition, according to an advantageous embodiment of the invention, in order to ensure guiding of the pre-cutting member along this circular path, the guide duct of said pre-cutting member is delimited, according to the transverse axis (Y), by a convex wall forming a span guiding said pre-cutting member, pierced with a slot extending in the plane (Y, Z) for guiding the cutting member.

Selon une première variante avantageuse de réalisation de l'invention, les moyens de déplacement de chaque mors serre-flan sont dissociés des moyens d'actionnement des organes de coupe et à cet effet :

  • ▪ les moyens de déplacement de chaque mors serre-flan comportent un chariot sur lequel est monté le dit mors serre-flan, et des moyens de déplacement en translation du dit chariot selon l'axe transversal (Y),
  • ▪ l'organe de coupe et l'organe de pré-coupe sont montés sur le chariot et sont associés à des moyens de déplacement aptes à les déplacer selon l'axe transversal (Y) relativement au dit chariot.
According to a first advantageous variant embodiment of the invention, the means for moving each jaw jaw are dissociated from the actuating means of the cutting members and for this purpose:
  • ▪ the means for moving each jaw clamp comprises a carriage on which is mounted said jaw clamp, and means for translational movement of said carriage along the transverse axis (Y),
  • ▪ the cutting member and the pre-cutting member are mounted on the carriage and are associated with displacement means adapted to move them along the transverse axis (Y) relative to said carriage.

De plus, selon cette première variante de réalisation et de façon avantageuse selon l'invention :

  • ▪ l'organe de coupe est porté par un bloc support associé à des moyens de déplacement du dit bloc support selon l'axe transversal (Y) relativement au chariot,
  • ▪ les moyens de déplacement de l'organe de pré-coupe comprennent un système de biellette reliant le dit organe de pré-coupe à un galet coopérant avec une came montée sur le bloc support.
In addition, according to this first embodiment and advantageously according to the invention:
  • ▪ the cutting member is carried by a support block associated with means for moving said support block along the transverse axis (Y) relative to the carriage,
  • ▪ The means for moving the pre-cut member comprises a connecting rod system connecting said pre-cut member to a roller cooperating with a cam mounted on the support block.

De plus, la came consiste avantageusement, selon l'invention, en une came à rainure adaptée pour s'étendre latéralement par rapport à l'organe de coupe, entre le bloc support et le mors serre-flan, le système de biellette comportant une manivelle apte à transformer le mouvement de translation du galet guidé par la came à rainure en un mouvement de rotation de l'organe de pré-coupe.In addition, the cam advantageously consists, according to the invention, of a groove cam adapted to extend laterally with respect to the cutting element, between the support block and the blank jaw, the connecting rod system comprising a crank adapted to transform the translation movement of the roller guided by the grooved cam in a rotational movement of the pre-cut member.

Selon une seconde variante avantageuse de réalisation de l'invention, les moyens de déplacement de chaque mors serre-flan sont adaptés pour engendrer également les déplacements de l'organe de coupe, et ces moyens de déplacement sont, en outre, dissociés des moyens d'actionnement de l'organe de pré-coupe. A cet effet, selon l'invention, et en premier lieu, chaque mors serre-flan est accouplé à des moyens supports :

  • ▪ auxquels sont associés les moyens de déplacement du dit mors serre-flan selon l'axe transversal (Y),
  • ▪ sur lesquels est monté l'organe de coupe,
  • ▪ auxquels le dit mors serre-flan est relié par des organes de liaison escamotables entre un état rétracté dans lequel l'organe de coupe se trouve dans sa position active de coupe, et un état déployé dans lequel le dit organe de coupe se trouve dans sa position passive escamotée.
According to a second advantageous embodiment of the invention, the means for moving each clamp jaw are adapted to also generate the movements of the cutting member, and these moving means are, in addition, dissociated from the means of cutting. actuation of the pre-cut member. For this purpose, according to the invention, and in the first place, each clamping jaw is coupled to support means:
  • ▪ to which are associated the means for moving said blank holder jaw along the transverse axis (Y),
  • ▪ on which is mounted the cutting member,
  • ▪ to which the said clamp jaw is connected by retractable connecting members between a retracted state in which the cutting member is in its active cutting position, and an expanded state in which the said cutting member is in his passive position retracted.

De plus, en second lieu, selon l'invention, l'organe de pré-coupe est associé à des moyens de déplacement comprenant un actionneur adapté pour engendrer les déplacements du dit organe de pré-coupe.In addition, secondly, according to the invention, the pre-cutting member is associated with displacement means comprising an actuator adapted to generate the movements of said pre-cut member.

De plus, selon cette seconde variante de réalisation et de façon avantageuse selon l'invention, des moyens de pilotage de l'actionneur sont adaptés pour commander un déplacement de l'organe de pré-coupe selon un trajet aller, en vue de réaliser la pré-coupe, puis de commander le déplacement selon le trajet retour, après actionnement de l'organe de coupe.In addition, according to this second embodiment and advantageously according to the invention, actuator control means are adapted to control a displacement of the pre-cut member in a forward path, in order to achieve the pre-cut, then to control the movement along the return path, after actuation of the cutting member.

En outre, l'actionneur consiste avantageusement selon l'invention en un vérin fluidique accouplé respectivement aux moyens supports de l'organe de coupe et au mors serre-flan, et adapté, d'une part pour que son déploiement engendre un déplacement selon le trajet aller de l'organe de pré-coupe, et d'autre part pour exercer une force de butée contre le mors serre-flan, en premier lieu dans son état déployé, et en second lieu lors de sa rétraction et de son déploiement résultant des déplacements des moyens supports de l'organe de coupe relativement au mors serre-flan, engendrant la coupe du profilé.In addition, the actuator advantageously consists according to the invention in a fluidic jack coupled respectively to the support means of the cutting member and the clamp jaw, and adapted, firstly for its deployment causes a displacement according to the forward path of the pre-cut member, and secondly to exert a stop force against the clamp jaw, first in its deployed state, and secondly during its retraction and its resulting deployment displacements of the support means of the cutting member relative to the jaw clamp, generating section cutting.

Tel que cela sera mieux compris à la lecture de la description détaillée qui suit, ces dispositions permettent de garantir l'escamotage de l'organe de coupe après l'actionnement de ce dernier.As will be better understood on reading the detailed description which follows, these arrangements make it possible to guarantee the retraction of the cutting member after the actuation of the latter.

Selon un autre mode de réalisation avantageux relatif à la seconde variante de réalisation de l'invention :

  • ▪ chaque organe de coupe est porté par un chariot accolé à un bloc-support auquel sont associés les moyens de déplacement du mors serre-flan selon l'axe transversal (Y),
  • ▪ les organes de liaison escamotables disposés entre chaque mors serre-flan et les moyens supports de l'organe de coupe comprennent :
    • au moins un vérin, dit vérin de butée, s'étendant longitudinalement entre le mors serre-flan et le bloc-support,
    • un vérin dit vérin de coupe, agencé pour venir en appui contre le chariot portant l'organe de coupe de façon, lors de son déploiement, à exercer sur le dit chariot un effort tendant à le décoller du bloc-support,
    • des moyens d'alimentation du vérin de coupe et de chaque vérin de butée, consistant en un circuit fermé adapté pour que le vérin de coupe et chaque vérin de butée soient alimentés de façon inversée.
According to another advantageous embodiment relating to the second variant embodiment of the invention:
  • ▪ each cutting member is carried by a carriage attached to a support block which is associated with the means for moving the jaw clamp according to the transverse axis (Y),
  • ▪ The retractable connecting members disposed between each clamping jaw and the support means of the cutting member comprise:
    • at least one jack, said thrust cylinder, extending longitudinally between the jaw clamp and the support block,
    • a jack said cutting cylinder, arranged to bear against the carriage carrying the cutting member so, during its deployment, to exert on said carriage a force tending to take off the support block,
    • feed means for the cutting cylinder and each stop cylinder, consisting of a closed circuit adapted so that the cutting cylinder and each stop cylinder are fed in an inverted manner.

D'autres caractéristiques, buts et avantages de l'invention ressortiront de la description détaillée qui suit en référence aux dessins annexés qui en représentent à titre d'exemples deux modes de réalisation préférentiels. Sur ces dessins :

  • la figure 1 est une vue en perspective, selon un premier angle de vue, d'une forme de cintrage et des organes de guidage d'un profilé équipant une tête de cintrage selon un mode de réalisation préférentiel du dispositif de cintrage de l'invention.
  • la figure 2 est une vue en perspective, selon un deuxième angle de vue, de cette forme de cintrage et de ces organes de guidage,
  • la figure 3 est une vue en perspective d'un ensemble mors serre-flan/moyens supports de ce mors serre-flan conforme à une première variante de réalisation préférentielle d'un dispositif de cintrage conforme à l'invention,
  • la figure 4 est une vue latérale longitudinale, avec des arrachés partiels, de cet ensemble mors serre-flan/moyens supports du dit mors serre-flan,
  • la figure 5 est une vue latérale longitudinale de cet ensemble mors serre-flan/moyens supports du dit mors serre-flan,
  • la figure 6 est une vue en perspective avec des arrachés partiels de cet ensemble mors serre-flan/moyens supports, sur laquelle est représenté schématiquement le circuit d'alimentation des vérins de butée,
  • la figure 8 est un schéma du circuit d'alimentation de cet ensemble mors serre-flan/moyens supports,
  • les figures 9a-9c sont des vues en perspective représentant trois étapes du fonctionnement de cet ensemble mors serre-flan/moyens supports,
  • et la figure 10 est une vue en perspective d'un ensemble mors serre-flan/moyens supports de ce mors serre-flan conforme à une seconde variante de réalisation préférentielle d'un dispositif de cintrage conforme à l'invention.
Other features, objects and advantages of the invention will emerge from the detailed description which follows with reference to the accompanying drawings which show by way of example two preferred embodiments. On these drawings:
  • the figure 1 is a perspective view, according to a first angle of view, of a bending form and guide members of a profile fitted to a bending head according to a preferred embodiment of the bending device of the invention.
  • the figure 2 is a perspective view, according to a second angle of view, of this form of bending and of these guide members,
  • the figure 3 is a perspective view of a blank jaw / support means assembly of this blank jaw according to a first preferred embodiment of a bending device according to the invention,
  • the figure 4 is a longitudinal side view, with partial snatchings, of this set clamp jaw / means supports said clamping jaw,
  • the figure 5 is a longitudinal side view of this set clamp jaw / means supports said clamping jaw,
  • the figure 6 is a perspective view with partial detachments of this clamp jaw / support means assembly, on which is schematically represented the supply circuit of the thrust cylinders,
  • the figure 8 is a schematic diagram of the supply circuit of this jaw clamp assembly / support means,
  • the Figures 9a-9c are perspective views showing three steps in the operation of this jaw clamp assembly / support means,
  • and the figure 10 is a perspective view of a blank jaw / support means of this jaw clamp according to a second preferred embodiment of a bending device according to the invention.

Les dispositifs de cintrage selon l'invention représentés à titre d'exemples respectivement aux figures 1 à 9 et à la figure10, consistent en des machines à cintrer un profilé porté par des moyens de déplacement (non représentés) aptes à le déplacer selon un axe de déplacement horizontal (X), et comportant, par exemple, soit une pince associée à des moyens d'entraînement de cette dernière selon l'axe longitudinal (X), soit un robot 6 axes du type décrit dans le brevet FR2914203 .The bending devices according to the invention shown by way of examples respectively to Figures 1 to 9 and at the Figure10 , consist of machines for bending a section carried by displacement means (not shown) able to move it along a horizontal axis of displacement (X), and comprising, for example, either a clamp associated with drive means the latter along the longitudinal axis (X), a 6-axis robot of the type described in the patent FR2914203 .

Il est à noter que, à des fins de simplification de la description détaillée qui suit, la tête de cintrage est décrite dans sa position initiale de chargement d'un profilé dans laquelle les empreintes de serrage de la forme de cintrage et du mors serre-flan sont axés sur l'axe longitudinale (X) de déplacement des profilés, et l'axe transversal (Y) de déplacement du mors serre-flan est orthogonal à cet axe longitudinal (X).It should be noted that, for the sake of simplification of the following detailed description, the bending head is described in its initial loading position of a profile in which the clamping impressions of the bending form and the jaw clamps. blanks are oriented on the longitudinal axis (X) of movement of the profiles, and the transverse axis (Y) of displacement of the clamp jaw is orthogonal to this longitudinal axis (X).

Selon les deux modes de réalisation représentés aux figures, la tête de cintrage comprend, en premier lieu, une réglette 1 comportant une gorge longitudinale 2 d'appui et de guidage des profilés, portée par des moyens (non représentés) de déplacement de la dite réglette selon un axe longitudinal parallèle à l'axe (X) et selon un axe transversal horizontal (Y) orthogonal au plan (X, Z), (l'axe Z représentant l'axe de cintrage consistant en l'axe de rotation de la tête de cintrage orthogonal à l'axe X).According to the two embodiments shown in the figures, the bending head comprises, firstly, a strip 1 having a longitudinal groove 2 for supporting and guiding the profiles, carried by means (not shown) of displacement of the said strip along a longitudinal axis parallel to the axis (X) and along a horizontal transverse axis (Y) orthogonal to the plane (X, Z), (the axis Z representing the axis of bending consisting of the axis of rotation of the bending head orthogonal to the X axis).

Cette tête de cintrage comporte également un efface-pli 3 doté d'une gorge de guidage, destiné à coopérer avec la réglette 1 en vue de l'appui et du guidage des profilés.This bending head also comprises an erase-fold 3 with a guide groove, intended to cooperate with the strip 1 for the support and guidance of the profiles.

Cet efface-pli 3 est accolé à la forme de cintrage de cette tête de cintrage qui comporte, en premier lieu, un galet cylindrique 4 solidarisé sur une platine circulaire 5 adaptée pour être montée sur des moyens (non représentés) d'entraînement en rotation du dit galet cylindrique 4 autour de l'axe de cintrage (Z).This erase-fold 3 is attached to the bending form of this bending head which comprises, firstly, a cylindrical roller 4 secured to a circular plate 5 adapted to be mounted on means (not shown) for rotating drive said cylindrical roller 4 about the bending axis (Z).

Ce galet cylindrique 4 est doté d'une gorge périphérique 7 et présente une échancrure 6 de section en forme de L délimitée par deux parois perpendiculaires et se prolongeant au niveau de la platine 5.This cylindrical roller 4 has a peripheral groove 7 and has a notch 6 of L-shaped section delimited by two perpendicular walls and extending at the level of the plate 5.

De plus, une rainure 8 s'étendant selon un axe parallèle à l'axe (Z) est ménagée dans la paroi de l'échancrure 6 parallèle à l'axe (X), la dite rainure logeant le montant d'un rail 9 en forme de TIn addition, a groove 8 extending along an axis parallel to the axis (Z) is formed in the wall of the notch 6 parallel to the axis (X), said groove housing the amount of a rail 9 T-shaped

Ce rail 9 est destiné à la mise en place, dans l'échancrure 6, d'un mors de serrage 10 de forme parallélépipédique rectangle, dit contre-mors de serrage, doté notamment :

  • d'une face frontale 10a dans laquelle est ménagée une empreinte de serrage 11,
  • d'une face frontale opposée 10c dans laquelle est ménagée une rainure 12 en forme de T adaptée pour loger le rail 9, dans une position où une des faces transversales de ce contre-mors de serrage 10 est plaquée contre la paroi adjacente de l'échancrure 6.
This rail 9 is intended for the establishment, in the notch 6, a clamping jaw 10 of rectangular parallelepiped shape, called clamping jaw, including:
  • a front face 10a in which is formed a clamping impression 11,
  • an opposite end face 10c in which is provided a T-shaped groove 12 adapted to house the rail 9, in a position where one of the transverse faces of the clamping jaw 10 is pressed against the adjacent wall of the notch 6.

Selon l'exemple représenté, l'empreinte 11 forme, en outre, un coude de 90° doté d'une branche 11a axée sur l'axe longitudinal (X) et d'une branche 11b perpendiculaire au dit axe longitudinal (X).According to the example shown, the cavity 11 forms, in addition, a 90 ° elbow with a branch 11a centered on the longitudinal axis (X) and a branch 11b perpendicular to said longitudinal axis (X).

Par ailleurs, le contre-mors de serrage 10 est percé d'une fente traversante 13 s'étendant entre les faces frontales 10a, 10c de façon à déboucher, d'une part dans la branche 11a de l'empreinte 11, et d'autre part dans la gorge 7 du galet cylindrique 4.Furthermore, the clamping jaw 10 is pierced with a through slot 13 extending between the end faces 10a, 10c so as to open, on the one hand, in the branch 11a of the cavity 11, and on the other side. on the other hand in the groove 7 of the cylindrical roller 4.

En dernier lieu concernant ce contre-mors de serrage 10, la face frontale 10a est percée de quatre orifices borgnes, dits de centrage, tels que 14, ménagés chacun dans la zone d'un des sommets de cette face frontale 10a.Finally, with respect to this clamping jaw 10, the end face 10a is pierced with four blind holes, said centering holes, such as 14, each formed in the area of one of the peaks of this end face 10a.

La tête de cintrage selon l'invention comporte également un mors de serrage, dit mors serre-flan, de mêmes formes et dimensions que le contre-mors de serrage 10.The bending head according to the invention also comprises a clamping jaw, said clamp jaw, of the same shape and dimensions as the clamping jaw 10.

Selon le mode de réalisation représenté aux figures 2 à 9, ce mors serre-flan 15 comporte une face frontale 15a dans laquelle est ménagée une empreinte de serrage 16 conjuguée de l'empreinte 11 et présentant donc la forme d'un coude formé de deux branches 16a, 16b perpendiculaires.According to the embodiment shown in Figures 2 to 9 , this clamp jaw 15 has a front face 15a in which is formed a clamping fingerprint 16 conjugate of the cavity 11 and thus having the shape of a bend formed of two perpendicular branches 16a, 16b.

De plus, ce mors serre-flan 15 est percé d'une fente traversante 17 s'étendant entre ses faces frontales de façon à déboucher dans la branche 16a de l'empreinte 16, dans la continuité de la fente 13 ménagée dans le contre-mors de serrage 10.In addition, this jaw clamp 15 is pierced with a through slot 17 extending between its end faces so as to open into the branch 16a of the cavity 16, in the continuity of the slot 13 formed in the counter- clamping jaws 10.

En outre, ce mors serre-flan 15 comporte quatre pions de centrage tels que 18 adaptés pour se loger dans les orifices de centrage 14 du mors de serrage 10 lors de l'accouplement de ces deux éléments.In addition, this jaw clamp 15 comprises four centering pins such as 18 adapted to be housed in the centering orifices 14 of the jaw 10 during the coupling of these two elements.

Ce mors serre-flan 15 est associé à un bloc support 19 de forme sensiblement cubique adapté pour être monté sur des moyens (non représentés) de déplacement de l'ensemble mors serre-flan 15/bloc support 19 selon un axe dit transversal (Y) relativement à la forme de cintrage 10. En vue de ce montage, ce bloc support 19 comporte, à l'opposé du mors serre-flan 15, une face frontale dans laquelle est ménagée une nervure apte à loger un rail 20 d'accrochage du dit bloc support.This jaw clamp 15 is associated with a support block 19 of substantially cubic shape adapted to be mounted on means (not shown) for moving the jaw clamp assembly 15 / support block 19 along a so-called transverse axis (Y ) relative to the bending form 10. With a view to this assembly, this support block 19 comprises, opposite the clamp jaw 15, a front face in which is formed a rib adapted to house a rail 20 hooking of said support block.

De plus, la liaison entre le mors serre-flan 15 et le bloc support 19 est assurée au moyen de trois tiges 21-23 :

  • solidaires de la face du mors serre-flan 15 opposée à l'empreinte 16, de façon à s'étendre, selon un axe transversal (Y), dans le prolongement arrière du dit mors serre-flan,
  • montées coulissantes à l'intérieur de douilles à billes telles que 24 solidaires du bloc-support 19.
In addition, the connection between the clamping jaw 15 and the support block 19 is ensured by means of three rods 21-23:
  • secured to the face of the jaw jaw 15 opposite the footprint 16, so as to extend, along a transverse axis (Y), in the rear extension of said blanking jaw,
  • slidably mounted within ball bushings such as 24 secured to the support block 19.

Le dispositif de cintrage comporte, en outre, un chariot 25 accolé au bloc support 19, entre ce dernier et le mors serre-flan 15, d'une part, équipé de douilles à billes telles que 26 agencées pour permettre au dit chariot de coulisser le long des tiges 21-23, et d'autre part, sur lequel est solidarisée une lame de coupe 27 comportant un tronçon d'extrémité en forme de pointe axée sur le plan (X, Y), enchâssée dans la face frontale du chariot 25 opposée au bloc support 19 de façon à s'étendre orthogonalement par rapport à cette dernière.The bending device further comprises a carriage 25, which is attached to the support block 19, between the latter and the holder jaw 15, on the one hand, equipped with ball bushes such as 26 arranged to allow said carriage to slide. along the rods 21-23, and secondly, on which is secured a cutting blade 27 having a tip-shaped end portion oriented on the plane (X, Y), embedded in the front face of the carriage 25 opposed to the support block 19 so as to extend orthogonally relative thereto.

Ce dispositif de cintrage comporte, par ailleurs, trois vérins hydrauliques de butée 28-30 disposés entre le mors serre-flan 15 et le bloc support 19, comprenant une tige de vérin 31 dotée d'une extrémité filetée 31a de solidarisation de la dite tige au mors serre-flan 15, et d'une extrémité opposée formant un piston 32 logé dans une chambre de vérin 33 ménagée longitudinalement dans le bloc support 19.This bending device comprises, moreover, three hydraulic stop cylinders 28-30 disposed between the clamping jaw 15 and the support block 19, comprising a jack rod 31 having a threaded end 31a for securing said rod with the jaw clamp 15, and an opposite end forming a piston 32 housed in a cylinder chamber 33 arranged longitudinally in the support block 19.

Les trois chambres 33 sont, en outre, alimentées, depuis des orifices de connexion 34-36 par des conduits tels que 37 reliant, d'une part, les dits orifices, et d'autre part, les trois chambres 33.The three chambers 33 are, furthermore, fed from connection ports 34-36 by conduits such as 37 connecting, on the one hand, said orifices, and on the other hand, the three chambers 33.

Le dispositif de cintrage comporte également un vérin de coupe 38 adapté pour solliciter le chariot 25 de façon, lors de son déploiement, à exercer sur le dit chariot un effort tendant à le décoller du bloc-support 19.The bending device also comprises a cutting cylinder 38 adapted to urge the carriage 25 so as to deploy, to exert on said carriage a force tending to take it off the support block 19.

A cet effet, ce vérin de coupe 38 comporte une tige 39 dotée d'une extrémité formant un piston 40 logé dans une chambre de vérin 41 ménagée longitudinalement dans le bloc support 19, de façon à déboucher en regard du chariot 25, et alimentée depuis un orifice de connexion 42.For this purpose, this cutting cylinder 38 comprises a rod 39 provided with an end forming a piston 40 housed in a cylinder chamber 41 arranged longitudinally in the support block 19, so as to open opposite the carriage 25, and fed from a connection port 42.

Selon l'invention, en outre, tel que représenté à la figure 8, les trois vérins de butée 28-30 et le vérin de coupe 38 sont connectés de façon à former un circuit hydraulique fermé incorporant un distributeur 43 et un réducteur de débit unidirectionnel 44..According to the invention, furthermore, as shown in figure 8 , the three stop cylinders 28-30 and the cutting cylinder 38 are connected to form a closed hydraulic circuit incorporating a distributor 43 and a unidirectional flow restrictor 44.

Un tel circuit hydraulique fermé est adapté, en premier lieu, dans une première position du distributeur 43, pour maintenir, sous pression de fluide, les vérins de butée 28-30 dans leur position déployée, permettant notamment de cintrer de façon usuelle un profilé maintenu enserré entre le contre mors de serrage 10 et le mors serre-flan 15.Such a closed hydraulic circuit is adapted, in the first place, in a first position of the distributor 43, to maintain, under fluid pressure, the stop cylinders 28-30 in their deployed position, in particular making it possible to bend in the usual manner a section maintained enclosed between the clamping jaw 10 and the clamp jaw 15.

Une commutation du distributeur 43 effectuée en vue de débuter l'opération de coupe, conduit, par contre, à permettre la vidange de la chambre 33 de chacun des vérins de butée 28-30, lors du déplacement du bloc support 19 engendré par les moyens de déplacement de l'ensemble mors de serre-flan 15/bloc support 19 selon un axe dit transversal (Y) relativement à la forme de cintrage 4, 10.A switching of the distributor 43 made to start the cutting operation, leads, on the other hand, to allow the emptying of the chamber 33 of each of the stop cylinders 28-30, during the displacement of the support block 19 generated by the means moving the jaw clamp assembly 15 / support block 19 along a so-called transverse axis (Y) relative to the bending form 4, 10.

Le débit de fluide lors de cette vidange est, en outre, régulé par le réducteur de débit 44, de sorte que le mors serre-flan 15 est maintenu appliqué contre le contre mors de serrage 10 avec une force de pressage déterminée par ce réducteur de débit 44, conférant ainsi au dit mors serre-flan une fonction de presse-flan permettant la découpe du profilé au moyen de la lame de coupe 27.The flow rate of the fluid during this emptying is furthermore regulated by the flow restrictor 44, so that the holding jaw 15 is held pressed against the clamping jaw 10 with a pressing force determined by this reducing gear. flow 44, thus conferring on the said blank jaw a blank press function for cutting the profile by means of the cutting blade 27.

Enfin, lors de la découpe, une force est appliquée sur le chariot 25 par le vérin de coupe 38, favorisant ainsi l'opération de coupe.Finally, during cutting, a force is applied to the carriage 25 by the cutting cylinder 38, thus favoring the cutting operation.

Par ailleurs, tel que notamment représenté à la figure 7, le mors serre-flan 15 est scindé en deux blocs 15b, 15c adaptés pour:

  • conférer un caractère démontable au dit mors serre-flan permettant de modifier la forme de l'empreinte 16,
  • délimiter une chambre 47 communiquant avec la fente 17 débouchant dans l'empreinte 16, formant un conduit adapté pour assurer le guidage d'un organe de pré-coupe 45 présentant une extrémité de coupe formant au moins une pointe de coupe, actionné de façon à être déplacé dans un plan (Y, Z) :
    • entre deux positions, dites haute et basse, dans chacune desquelles il dégage l'accès à la fente 17,du mors serre-flan 15,
    • selon une trajectoire circulaire centrée sur un point situé sur l'axe transversal (Y),.adaptée pour que chaque pointe de coupe pénètre dans l'empreinte 16 au travers de la fente 17, d'une profondeur adaptée pour réaliser une amorce de découpe du profilé au moins au voisinage de la génératrice de ce dernier s'étendant dans le plan (X, Y),
Moreover, as represented in particular in figure 7 , the clamp jaw 15 is split into two blocks 15b, 15c adapted for:
  • imparting a removable character to said blank jaw for modifying the shape of the impression 16,
  • delimiting a chamber 47 communicating with the slot 17 opening into the cavity 16, forming a duct adapted to guide a pre-cutting member 45 having a cutting end forming at least one cutting tip, actuated so as to to be moved in a plane (Y, Z):
    • between two positions, said high and low, in each of which it releases the access to the slot 17, the clamping jaw 15,
    • in a circular path centered on a point located on the transverse axis (Y), adapted so that each cutting tip enters the cavity 16 through the slot 17, of a depth adapted to perform a cutting primer. of the profile at least in the vicinity of the generator of the latter extending in the plane (X, Y),

De plus, la chambre 47 est délimitée postérieurement par, par une paroi 48 dotée d'une face frontale convexe 48a formant une portée de guidage de l'organe de pré-coupe 45, la dite paroi étant percée d'une fente 49 s'étendant dans le plan (Y, Z), de guidage de l'organe de coupe 27.In addition, the chamber 47 is delimited posteriorly by a wall 48 provided with a convex front face 48a forming a guide surface of the pre-cutting member 45, said wall being pierced with a slot 49 extending in the plane (Y, Z) for guiding the cutting member 27.

Les moyens d'actionnement de l'organe de pré-coupe 45 comportent, quant à eux :

  • une manivelle menée 46 sur laquelle est monté l'organe de pré-coupe, dont le maneton 56 consiste en un arbre s'étendant selon un axe (x), sur l'extrémité duquel est monté un pignon 55,
  • une manivelle motrice 53 sur laquelle est montée un pignon moteur 54 agencé pour engrener avec le pignon 55 de la manivelle menée 46, et dont le maneton est actionné par un vérin 50 dont la tige 50b est équipée d'une chape 52 à l'intérieur de laquelle est articulée le dit maneton, et dont le corps 50a est solidarisé sur une platine 51 fixée sur une des parois longitudinales latérales du bloc-support 19.
The actuating means of the pre-cutting member 45 comprise, in turn:
  • a driven crank 46 on which is mounted the pre-cutting member, the crankpin 56 of which consists of a shaft extending along an axis (x), on the end of which is mounted a pinion 55,
  • a driving crank 53 on which is mounted a driving pinion 54 arranged to mesh with the pinion 55 of the driven crank 46, and whose crankpin is actuated by a jack 50 whose rod 50b is equipped with a yoke 52 inside of which is articulated said pin, and whose body 50a is secured to a plate 51 fixed on one of the longitudinal side walls of the support block 19.

De plus, le pignon moteur 54 présente une échancrure 54a en forme de V à l'intérieur de laquelle est positionnée une butée fixe 57 présentant également la forme d'un V.In addition, the drive pinion 54 has a V-shaped notch 54a inside which is positioned a fixed stop 57 also having the shape of a V.

L'ensemble de ces moyens d'actionnement, et notamment l'angle au sommet de cette échancrure 54a, la forme de la butée 57 et l'agencement du vérin 50, sont adaptés pour que les rotations du pignon moteur 54, engendrées par l'actionnement du vérin 50, entraînent des déplacements de l'organe de pré-coupe 45 entre sa position haute dans l'état rétracté du vérin 50, et sa position basse dans l'état déployé du vérin 50.All of these actuating means, and in particular the angle at the apex of this notch 54a, the shape of the abutment 57 and the arrangement of the jack 50, are adapted so that the rotations of the driving pinion 54, generated by the actuation of the cylinder 50, cause displacements of the pre-cutting member 45 between its high position in the retracted state of the jack 50, and its low position in the deployed state of the jack 50.

Le fonctionnement de ce premier mode de réalisation de l'invention est décrit ci-dessous en référence notamment aux figures 9a à 9c.The operation of this first embodiment of the invention is described below with particular reference to Figures 9a to 9c .

En premier lieu, tel que représenté à la figure 9a, lors du déplacement du bloc support 19 visant à rapprocher le mors serre-flan 15 du mors de serrage 10, puis lors de l'opération de cintrage réalisée dans la position accolée des dits mors serre-flan et mors de serrage, le distributeur 43 est commuté dans sa position de maintien de la lame de coupe 27 dans sa position escamotée, et le vérin 50 maintenu dans son état rétracté auquel correspond la position haute de l'organe de pré-coupe 45.In the first place, as represented in figure 9a during the displacement of the support block 19 to bring the clamp jaw 15 closer to the clamping jaw 10, then during the bending operation performed in the contiguous position of said clamp jaws and clamping jaws, the distributor 43 is switched to its holding position of the cutting blade 27 in its retracted position, and the cylinder 50 maintained in its retracted state corresponding to the upper position of the pre-cutting member 45.

Une fois le cintrage réalisé, tel que représenté à la figure 9b, le vérin 50 est déployé, entraînant le déplacement de l'organe de pré-coupe 45 vers sa position basse le long d'une trajectoire engendrant une amorce de découpe du profilé.Once the bending is done, as shown in figure 9b , the cylinder 50 is deployed, causing the displacement of the pre-cutting member 45 to its lower position along a path generating a cutting edge of the profile.

Après réalisation de cette amorce de coupe, et tel que représenté à la figure 9c, un déplacement supplémentaire du bloc-support 19 est commandé, après commutation du distributeur 43 dans sa position apte à générer un déplacement relatif du chariot 25 par rapport au bloc-support 19, et, par conséquent, un déplacement de la lame de coupe 27 entraînant la découpe du profilé. Parallèlement, l'alimentation du vérin 50 est adaptée de façon que le déplacement du bloc support 19 auquel est solidarisé le corps 50a du dit vérin entraine la rétraction de ce vérin 50. Ainsi, ce vérin 50 applique une force de maintien du mors serre-flan 15 en appui contre le mors de serrage 10.After completion of this cutting primer, and as shown in FIG. Figure 9c an additional displacement of the support block 19 is controlled, after switching of the distributor 43 in its position adapted to generate a relative displacement of the carriage 25 relative to the support block 19, and, consequently, a displacement of the cutting blade 27 causing cutting of the profile. At the same time, the power supply of the jack 50 is adapted so that the displacement of the support block 19 to which the body 50a of said jack is secured results in the retraction of this jack 50. Thus, this jack 50 applies a holding force to the holding jaw. flan 15 resting against the clamping jaw 10.

L'étape suivante, commandée une fois la découpe du profilé réalisée, consiste à commander le recul du bloc support 19, recul pendant lequel le mors serre-flan 15 est maintenu en appui contre le mors de serrage 10 par le vérin 50 alimenté de façon à se déployer du fait du dit recul du bloc support 19. Parallèlement, le distributeur 43 est à nouveau commuté de sorte que le recul initial du bloc support 19, effectué avec le mors serre-flan 15 maintenu en appui contre le mors de serrage 10 par le vérin 50, conduit à un rapprochement relatif du chariot 25 et du bloc support et par conséquent à un escamotage de la lame de coupe 27.The following step, controlled once the section has been cut, consists in controlling the recoil of the support block 19, during which the holding jaw 15 is held in abutment against the clamping jaw 10 by the jack 50 fed in such a way to deploy due to said recoil of the support block 19. In parallel, the distributor 43 is switched again so that the initial retraction of the support block 19, performed with the clamp jaw 15 held in abutment against the clamping jaw 10 by the jack 50, leads to a relative approximation of the carriage 25 and the support block and therefore a retraction of the cutting blade 27.

En dernier lieu, la dernière étape consiste à commander une alimentation du vérin 50 adaptée pour entraîner la rétraction du dit vérin, et donc pour entraîner le déplacement de l'organe de pré-coupe 45 vers sa position haute initiale représentée à la figure 9a.Finally, the last step consists in controlling a supply of the jack 50 adapted to cause the retraction of said jack, and therefore to cause the displacement of the pre-cutting member 45 towards its initial high position shown in FIG. figure 9a .

Selon le second mode de réalisation représenté à la figures 10, le mors serre-flan 61 comporte, tel que le précédent, une face frontale dans laquelle est ménagée une empreinte de serrage 62 dans laquelle débouche une fente 63 communiquant avec une chambre de guidage d'un organe de pré-coupe (non représentés sur la figure 10).According to the second embodiment shown in figures 10 , the jaw clamp 61 comprises, as the previous one, a front face in which is formed a clamping impression 62 into which a slot 63 communicating with a guide chamber of a pre-cutting member (not shown in FIG. the figure 10 ).

Selon ce mode de réalisation, le mors serre-flan 61 est solidarisé sur un chariot 64, en l'exemple représenté sous la forme d'un plateau, dont les déplacements sont adaptés pour permettre d'amener le dit mors serre-flan soit dans une position de serrage accolée à la forme de cintrage 10, soit dans une position ouverte écartée de cette forme de cintrage.According to this embodiment, the blank jaw 61 is secured to a carriage 64, in the example shown in the form of a plate, the movements of which are adapted to allow said blanking jaw to be brought into either a clamping position contiguous to the bending form 10, or in an open position spaced from this bending form.

En outre, l'organe de coupe 66 consiste en une lame de coupe similaire à celle décrite ci-dessus, portée par un bloc support 65 associé à des moyens d'entrainement du dit bloc support aptes à le déplacer selon l'axe transversal (Y) le long du chariot 64, entre une position active de coupe d'un profilé logé dans les empreintes 11, 62 de la paire mors serre-flan 61/forme de cintrage 10, et une position passive de cintrage, dans laquelle la dite lame de coupe est escamotée en retrait par rapport aux dites empreintes.In addition, the cutting member 66 consists of a cutting blade similar to that described above, carried by a support block 65 associated with drive means of said support block able to move it along the transverse axis ( Y) along the carriage 64, between an active cutting position of a profile housed in the indentations 11, 62 of the pair of clamp jaws 61 / bending form 10, and a passive bending position, in which said cutting blade is retracted recessed from said fingerprints.

En l'exemple représenté, ces moyens d'entrainement du bloc support 65 consistent en une vis à billes 70 solidaire du dit bloc support entraînée, au moyen d'une transmission formée de deux pignons 68, 69, par un moteur électrique 67.In the example shown, these drive means of the support block 65 consist of a ball screw 70 integral with said driven support block, by means of a transmission formed of two pinions 68, 69, by an electric motor 67.

Selon ce mode de réalisation, en outre, les moyens de déplacement de l'organe de pré-coupe comprennent :

  • une came à rainure 72 ménagée dans une plaque 71 fixée latéralement sur le bloc support 65, de façon que la dite rainure s'étende latéralement par rapport à l'organe de coupe 66, entre le dit bloc support et le mors serre-flan 61,
  • une manivelle 77 reliant l'organe de coupe à un galet 76 logé dans la rainure de la came 72, adaptée pour transformer le mouvement de translation du dit galet guidé par la dite came à rainure 72 en un mouvement de rotation de l'organe de pré-coupe.
According to this embodiment, in addition, the means for moving the pre-cutting member comprise:
  • a grooved cam 72 formed in a plate 71 laterally fixed on the support block 65, so that said groove extends laterally with respect to the cutting member 66, between said support block and the holding jaw 61 ,
  • a crank 77 connecting the cutting member to a roller 76 housed in the groove of the cam 72, adapted to transform the translational movement of said roller guided by said groove cam 72 into a rotational movement of the pre-cutting.

En outre, la rainure de la came à rainure se compose de deux tronçons d'extrémité 73, 74 parallèles s'étendant selon des axes (y) et décalés l'un par rapport à l'autre selon un axe (z), reliés par un tronçon incliné 73 déterminant l'amplitude de la rotation de la manivelle 77.In addition, the groove of the groove cam consists of two parallel end sections 73, 74 extending along axes (y) and offset relative to each other along an axis (z), connected by an inclined section 73 determining the amplitude of the rotation of the crank 77.

Selon ce mode de réalisation, dans la position accolée de la forme de cintrage 10 et du mors serre-flan 6, l'amorce de découpe puis la découpe sont réalisées en commandant l'activation du moteur électrique 67, de façon à provoquer successivement :

  • l'actionnement de l'organe de pré-coupe résultant de la rotation de la manivelle 77 provoquée par le déplacement du galet 76 dans la rainure 73-75 de la came à rainure 72,
  • l'introduction de la lame de coupe 66 dans les empreintes 11, 63, puis l'escamotage de cette lame de coupe 66 lors du recul initial du bloc support 65,
  • et enfin le retour de l'organe de pré-coupe dans sa position initiale lors de la poursuite du recul du bloc support 65.
According to this embodiment, in the contiguous position of the bending form 10 and the holding jaw 6, the cutting primer and the cutting are performed by controlling the activation of the electric motor 67, so as successively to cause:
  • actuating the pre-cutting member resulting from the rotation of the crank 77 caused by the displacement of the roller 76 in the groove 73-75 of the grooved cam 72,
  • the introduction of the cutting blade 66 in the cavities 11, 63, and then the retraction of this cutting blade 66 during the initial retreat of the support block 65,
  • and finally the return of the pre-cutter member to its initial position when the recoil of the support block 65 is continued.

Les deux modes de réalisation de l'invention ci-dessus décrits fournissent donc des dispositifs de cintrage conçus de façon à réduire le temps de l'étape finale de coupe de ce profilé, et à réaliser, lors de cette étape finale, une coupe nette et franche du profilé.The two embodiments of the invention described above therefore provide bending devices designed to reduce the time of the final cutting step of this section, and to achieve, in this final step, a clean cut and frank profile.

Claims (10)

  1. A device for bending profile members such as tubes, which are moved oriented along a longitudinal axis (X), comprising a bending head, on the one hand, mounted on rotation drive means of said bending head about a bending axis (Z) perpendicular to the axis (X) for moving the profile members and, on the other hand, comprising:
    • at least a bending form (4) oriented on the bending axis (Z), provided with a peripheral groove (7) for winding the profile member extending in the continuity of an impression (11) intended for the clamping of the said profile member,
    • associated with each bending form (4), a clamping jaw (15; 61) comprising a clamping impression (16; 62) for clamping the profile member, complementary to the impression (11) of said bending form,
    • means (20; 64) for moving each clamping jaw (15; 61) along an axis designated as transverse axis (Y) perpendicular to the bending axis (Z), relative to the associated bending form (4), between a clamping position adjoining said bending form, and an open position spaced apart from this bending form,
    • at least one clamping jaw (15; 61), designated as a hold-down jaw, being pierced by a through-hole opening out through a slot (17; 63) in the impression (16; 62) of said clamping jaw,
    • the bending form (4) associated with each hold-down jaw (15; 61) being pierced by a through-hole that opens out through a slot (13) in the impression (11) of said bending form, and arranged so as to extend in the continuity of the slot (17; 63) of said hold-down jaw,
    • a cutting member (27; 66) associated with each hold-down jaw (15; 61)/bending form (4) pair, comprising a cutting end forming at least one cutting tip extending in the plane (X, Y),
    • means (19, 25, 28-30, 38; 65, 67-70) for moving the cutting member (27; 66) along the transverse axis (Y) between an active cutting position of a profile member housed in the impressions (11, 16; 11, 62) of the associated hold-down jaw (15; 61)/bending form (4) pair, and a passive position, designated as bending position, in which said cutting member is retracted back in relation to said impressions,
    said bending device being characterized in that it comprises, associated with each hold-down jaw (15; 61)/bending form (4) pair, a second cutting member (45), designated as pre-cutting member, designed to be actuated before the cutting member (27; 66) and having a cutting end forming at least one cutting tip, and means (46, 50-56; 71-77) for moving this pre-cutting member (45) in the plane (Y, Z):
    - between two positions, in each of which said pre-cutting member clears the access to the slot (17; 63) opening out into the impression (16; 62) of the hold-down jaw (15; 61),
    - along a suitable path so that each cutting tip penetrates into the impression (16; 62) of the hold-down jaw (15; 61) through the slot (17; 63) by a suitable depth so as to realize a beginning of the cutting of the profile member at least in the vicinity of the generatrix of the latter, extending in the plane (X, Y),
    • the hold-down jaw (15; 61) comprising, communicating with the impression (16; 62) of said hold-down jaw through the slot (17; 63) opening out into the latter, a channel (47) designed to ensure the guiding of the pre-cutting member (45) during the movement of the latter,
    • and means (19, 25, 28-30, 38; 65, 67-70) for moving the cutting member (27; 66) being designed for determining a bending position, in which said cutting member is retracted back from the guiding channel (47) of the pre-cutting member (45).
  2. The bending device according to Claim 1, characterized in that the means (46, 50-56; 71-77) for moving each pre-cutting member (45) are designed to move the latter along a circular path centred on a point situated on the transverse axis (Y).
  3. The bending device according to Claim 2, characterized in that the guiding channel (47) of each pre-cutting member (45) is delimited, along the transverse axis (Y), by a convex wall (48a) forming a guiding range of said pre-cutting member, pierced by a slot (49) extending in the plane (Y, Z), for guiding the cutting member (27).
  4. The bending device according to one of the preceding claims, of which the means for moving each hold-down jaw (61) comprise a carriage (64) on which said hold-down jaw is mounted, and means for moving said carriage in translation along the transverse axis (Y), characterized in that the cutting member (66) and the pre-cutting member are mounted on the carriage (64) and are associated with means (67-70, 72-77) for moving, designed for moving them along the transverse axis (Y) relative to said carriage.
  5. The bending device according to Claim 4, characterized in that:
    • the cutting member (66) is carried by a support block (65) associated with means (68-70) for moving said support block along the transverse axis (Y) relative to the carriage (64),
    • the means for moving the pre-cutting member comprise a connecting-rod system (77) connecting said cutting member to a roller (76) cooperating with a cam (72) mounted on the support block (65).
  6. The bending device according to Claim 2 and 5 taken together, characterized in that the cam (72) consists of a cam with a groove designed for extending laterally with respect to the cutting member (66), between the support block (65) and the hold-down jaw (61), the connecting-rod system comprising a crank (77) able to transform the translational movement of the roller (76) guided by the grooved cam (72) into a rotational movement of the pre-cutting member.
  7. The bending device according to one of Claims 1 to 3, each hold-down jaw (15) of which is coupled with support means (19):
    • with which are associated the means for moving said hold-down jaw along the transverse axis (Y),
    • on which the cutting member (27) is mounted,
    • to which said hold-down jaw is connected by connecting elements (28-30) retractable between a retracted state in which the cutting member (27) is situated in its active cutting position, and a deployed state in which said cutting member is situated in its passive retracted position,
    said bending device being characterized in that the pre-cutting member (45) is associated with means for moving, including an actuator (50), designed to generate the movements of said pre-cutting member.
  8. The bending device according to Claim 7, characterized in that it includes means for controlling the actuator (50), which are designed to control a movement of the pre-cutting member (45) along an outward path, in order to carry out the pre-cutting, then to control the movement along the return path, after actuation of the cutting member (27).
  9. The bending device according to Claim 8, characterized in that the actuator consists of a fluidic cylinder (50) coupled respectively to the support means (19) of the cutting member (27) and to the hold-down jaw (15), and designed, on the one hand so that its deployment generates a movement along the outward path of the pre-cutting member (45), and on the other hand for exerting a stop force against the hold-down jaw (15), firstly in its deployed state, and secondly during its retraction and its deployment resulting from the movements of the support means (19) of the cutting member (27) relative to the hold-down jaw (15), causing the cutting of the profile member.
  10. The bending device according to Claim 9, characterized in that
    • each cutting member (27) is carried by a carriage (25) coupled to a support block (19) to which there are associated the means for moving the hold-down jaw (15) along the transverse axis (Y),
    • the retractable connecting members arranged between each hold-down jaw (15) and the support means (19) of the cutting member (27) comprise:
    - at least one actuator (28-30), designated as stop actuator, extending longitudinally between the hold-down jaw (15) and the support block (19),
    - an actuator (38), designated as cutting actuator, arranged to come to rest against the carriage (25) carrying the cutting member (27) so as, during its deployment, to exert on said carriage a force tending to loosen it from the support block (19),
    - means (43, 44) for feeding the cutting actuator (38) and each stop actuator (28-30), consisting of a closed circuit adapted so that the cutting actuator (38) and each stop actuator (28-30) are fed in an inverse manner.
EP16741654.4A 2015-06-24 2016-06-23 Device for bending profile members comprising tools for bending profile members and a tool for cutting said profile members Active EP3313593B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1501324A FR3037828A1 (en) 2015-06-24 2015-06-24 DEVICE FOR BENDING AND CUTTING PROFILES SUCH AS TUBES
PCT/FR2016/000106 WO2016207499A1 (en) 2015-06-24 2016-06-23 Device for bending profile members comprising tools for bending profile members and a tool for cutting said profile members

Publications (2)

Publication Number Publication Date
EP3313593A1 EP3313593A1 (en) 2018-05-02
EP3313593B1 true EP3313593B1 (en) 2019-08-14

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US (1) US10675666B2 (en)
EP (1) EP3313593B1 (en)
CN (1) CN107921503A (en)
FR (1) FR3037828A1 (en)
WO (1) WO2016207499A1 (en)

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CN112893558B (en) * 2021-01-18 2023-05-30 天津派浦澜能源科技有限公司 Automatic pipe bending device
CN114309186B (en) * 2021-11-22 2024-01-02 杭州景业智能科技股份有限公司 Stainless steel pipe bending device

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CN107921503A (en) 2018-04-17
EP3313593A1 (en) 2018-05-02
FR3037828A1 (en) 2016-12-30
US10675666B2 (en) 2020-06-09
WO2016207499A1 (en) 2016-12-29
US20180354011A1 (en) 2018-12-13

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