EP1264647A1 - Press brake for sheets with a movable workpiece stop device - Google Patents
Press brake for sheets with a movable workpiece stop device Download PDFInfo
- Publication number
- EP1264647A1 EP1264647A1 EP02291151A EP02291151A EP1264647A1 EP 1264647 A1 EP1264647 A1 EP 1264647A1 EP 02291151 A EP02291151 A EP 02291151A EP 02291151 A EP02291151 A EP 02291151A EP 1264647 A1 EP1264647 A1 EP 1264647A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carriage
- finger
- folding
- press brake
- transport carriage
- 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
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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
- 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
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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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/002—Positioning devices
Definitions
- the present invention relates to a press brake for sheets, provided with a mobile device of stop fingers, said press comprising a swan-neck frame having on the side front a fixed lower deck, the upper side of which serves to support a folding die and a vertically movable upper deck in alignment with the lower deck and carrying by its lower part one or more folding tools cooperating with said die and located in a vertical plane separating an interior area from the press brake an external or frontal area in which the press operator folder can work without danger of accident, while the device stop finger movable includes a support rail which is arranged in the interior area of the press brake, runs parallel to the folding die and is movable at least vertically, a support for each stop finger resting on said rail and movably mounted on the latter parallel to said matrix as well as a carriage capable move the stop fingers at least partially out of the area inside of the press brake to the front outside area of the press brake.
- a press brake for sheets of the type comprising a mobile stop finger device is known from the application of Patent EP 0 650 782 A1.
- the support rail is associated with a first carriage carrying said rail and movable vertically on vertical slides of a second horizontally movable carriage and perpendicular to the vertical plane passing through the folding matrix, the two carriages being arranged in the interior area of the press folder.
- stop finger supports cannot leave the interior area of the press brake so that the replacement of a stop finger forces the operator to advance his hands in said interior area and place these between the tool and the folding die.
- the commonly used stop fingers have the same length, they cannot adapt without exchange of at least one abutment finger to a sheet, the abutment edge of which is cut into steps or some other layered way.
- Yet another drawback of the device moving of stop fingers consists of the need to move the support rail each time the positioning of the stop edge of the sheet metal is changed from the folding die.
- the object of the present invention is to overcome the drawbacks known above and to offer in combination with a press brake a movable stop finger device allowing each finger to abutment to protrude entirely beyond the vertical plane containing the folding edge of the folding die and being positioned individually in distance from said vertical plane.
- the support rail is mounted in the interior area of the press brake a determined distance from the vertical folding plane, which a guide provided with locking means is capable of sliding the along the support rail and has two guides on its upper face lateral extending perpendicular to the folding plane, that a transport carriage is mounted on the guide carriage and is guided by the latter's lateral guides in its back and forth movements perpendicular to said folding plane, that the transport carriage has a longitudinal extension greater than the width of the guide carriage and has a finger at its front end located on the side of the folding plane removable stopper and at its rear end the motor housing drive, that a worm drive is mounted on the rear half of the transport trolley via bearings integral with said transport carriage and receiving the ends of said ball screw, as the rear end of said ball screw which extends perpendicular to the bending plane is coupled to the output shaft of the drive motor, and that the nut cooperating with the ball screw is fixed to the guide carriage on the side diverted from the folding plane by means of a flange which
- stop fingers are motorized individually in their movements perpendicular to the fold plane and can be brought entirely out of the folding press into the outside area front of it. In this position, the stop fingers can be replaced or adjusted safely and can even be used to move the guide carriage to a new position relative to its support rail.
- each stop finger is mounted on a finger holder
- the means for securing the finger holder at the front end of the carriage transport comprise means forming a pivot axis for said finger holder relative to said transport carriage, said axis of pivoting extending in a direction orthogonal to that of displacement of said transport carriage.
- said means of securing of the finger holder comprise means for locking said finger holder on the front end of said transport cart, said means being able to be unlocked under the effect of a excessive stress applied to said finger.
- said means of securing include two coaxial pins arranged along said axis of pivoting of which one end is engaged in a bore of the finger holder and the second end of which is engaged in a bore of the front end of the carriage, said second end of the pins being chamfered, part of the chamfered end being engaged in the bore of the front end of said transport carriage and held in this position by a return spring, whereby under the effect of excessive stress applied to said finger, the springs of booster are compressed and allow the second ends of said pins to exit from said bores thus authorizing separation said finger holder relative to said transport trolley.
- Figure 1 is shown schematically a cheek vertical lateral 1 of a frame in the form of a swan neck comprising front side a fixed lower deck 2, the upper side of which serves support to a folding die 3, as well as an upper deck (not shown) vertically movable in alignment with the deck lower 2 and carrying by its lower part one or more tools folding cooperating with said matrix 3.
- the lower and upper aprons 2 with their respective matrix 3 and their folding tools define a vertical plane called folding 4 separating an interior area of press brake 5 from an area front exterior 6 in which the operator of the press brake can work without risk of personal injury.
- the stop finger device 7 is normally arranged in the interior area 5 of the press brake between the side cheeks of the frame and behind the folding plane 4.
- This device 7 comprises a support rail 8 which extends horizontally and parallel to the matrix 3 and to the vertical plane of folding 4.
- the support rail 8 can occupy a fixed position in relates to its distance from the vertical folding plane 4, this distance being such that in the retracted position of the stop finger 9 the front end of the latter is in the inner zone of the press brake and is close to folding plane 4, but does not exceed this one.
- the support rail 8 can if necessary be movable in the vertical direction to adapt to the height of the folding die 3. It could also be movable in a direction perpendicular to the folding plane 4 to allow the stop fingers 9 to take different distances from said plane 4.
- Each stop finger 9 is associated with a carriage 10 which is slidably mounted on the support rail 8 with respect to which it can be locked in a chosen position after being moved there parallel to the folding die 3.
- the first carriage 10 of guidance not only allows the fingers 9 to move along the support rail 8 but also serves as a support and guide for a transport carriage 11 movably mounted on the guide carriage 10 of so that you can move horizontally and perpendicular to the folding plane 4.
- the transport carriage 11 is guided by two guides side 12, 13 of the guide carriage 10, these side guides 12, 13 being arranged on the upper face of the guide carriage 10 and extending horizontally and perpendicular to the vertical plane of folding 4.
- the rear end of the stop finger 9 is carried by the front part of the transport carriage 11 whose length and stroke take into account the position of the support rail 8 and the guide carriage 10 associated with it so that, on the one hand, in end position before said transport carriage 11, the finger stop 9 and the front part of said carriage are located beyond the plane vertical folding 4, entirely in the front external zone 6 and that, on the other hand, at the end of the rear stroke, said transport carriage 11 and the front end of the stop finger 9 are entirely in the inner zone 5 of the press brake 1.
- the length of the transport carriage 11 is at least twice the width of the guide carriage 10, width taken lengthwise of said transport cart 11. For for reasons of balance, it is however desirable that this length does not exceed three times the width of the guide carriage 10.
- the transport carriage 11 At its rear end, the transport carriage 11 comprises a transverse partition 14 on which is fixed the casing of an engine drive 15 whose output shaft is connected by a coupling 16 at the rear end of a mechanism drive 17 comprising a ball endless screw 17a and a nut 17b which cooperates with said ball screw 17a.
- the nut 17b is rendered immobile in rotation and in translation relative to the screw balls 17a using a vertical flange 18 fixed at the same time to the nut 17b and on side 10a of the guide carriage 10, side 10a diverted from the plane folding 4.
- the flange 18 passes through an oblong recess 19 formed in the bottom of the transport carriage 11 over the entire active length of the screw ball 17a which extends perpendicular to the vertical plane of folding 4.
- the ball screw 17a is arranged in the rear part of the transport carriage 11, this rear part being slightly more as long as the rear half of said carriage 11.
- the ends of the screw balls are housed in rolling bearings 20, 21 which prevent said screw 17a to move axially and which are integral with the transport cart 11 and lean against the ends of two stiffening ribs 22, 23 provided on either side of the oblong recess 19 of the carriage 11.
- the rear part of the transport carriage 11, part comprising the ball screw 17a covers the guide carriage 10 entirely, when said carriage transport 11 is in the advanced position in which at least the stop finger 9 is located entirely and preferably also the part front of said carriage 11 in the front external zone 6 in front of the plane vertical folding 4.
- the stop finger 9 is in the retracted position of the carriage transport 11, it is its front part which covers the guide carriage 10 and its rear part is cantilevered with respect to the latter, the tilting of the transport carriage 11 being prevented by the guides sides 12, 13 of the guide carriage 10.
- the stop finger 9, including its end front is in the inner area 5 of the press brake 1.
- the transport carriage 11 At its front end, the transport carriage 11 includes a notch 24 in which is housed the rear tail 25 of a finger holder 26, the front end of which is also provided of a recess 27 receiving the rear tail of the stop finger 9 biased against the domed heads of two support screws 40a and 40b engaged in the finger holder 26 by means of a tensioning screw 28 whose head rests against the bottom of an oblong hole 29 formed in the tail 25 of the finger holder 26.
- the rear end of the tail 25 of the finger holder 26 is articulated by an axis 30 on the lateral arms of the notch 24, the bottom is bevelled so that said tail 25 can escape upwards by tilting around axis 30 clockwise of a watch.
- the axis 30, which is orthogonal to the direction of movement of the carriage 11, is produced by two pawns 41a and 41b.
- the first end 42 of each pawn is engaged in a bore 43 formed in the tail 25 of the finger holder 26.
- the other end 44 of each piece is chamfered.
- This second chamfered end 44 partially penetrates a bore 45 made in the arms 46 and 47 of the front end of the carriage 11, arms which are defined by the notch 24.
- the second end 44 of pins 41a and 41b is kept partially engaged in the bores 45 by return means 48 made up of preferably with Belleville washers.
- the pawns 41a and 41b fill a double function: on the one hand, they constitute the pivot axis 30 of the stop finger 9 relative to the carriage 11, on the other hand, they form a finger holder 26 locking system on the front end (arms 46 and 47) of the transport carriage 11, this system being able to be unlocked due to excessive finger stress 9.
- the return means 48 are compressed by such that the chamfered ends 44 of the pins 41a and 41b come out of the bores 45, thus freeing the finger holder 26 and therefore the finger 9.
- the unlocking function makes it possible to avoid that in the event of wrong maneuvers, excessive constraints are applied to the various parts of the guide carriage and the transfer carriage.
- the carriage transfer 11 comprises a part 50 forming a stop face additional 51 being added to the abutment faces constituted by the terminal end 52 of finger 9 and by the shoulder 53 of this same finger.
- the additional abutment face 51 makes it possible to process sheets for which the distance between the edge in contact with the stop face and the fold line is greater than the maximum distance between the stop finger 9 itself in the maximum retracted position and the V folding.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
L'invention concerne un dispositif mobile de doigts de butée pour presse plieuse. Il comprend un rail de support (8) monté dans la zone intérieure (5) de la presse plieuse (1), un chariot de guidage (10) muni de moyens de blocage susceptible de coulisser le long du rail de support (8) et comportant deux guides latéraux (12, 13), un chariot de transport (11) monté sur le chariot de guidage (10) et guidé par les guides latéraux (12, 13). Le chariot de transport (11) porte à son extrémité frontale un doigt de butée amovible (9) et à son extrémité arrière un moteur d'entraînement (15). Un entraînement (17) à vis sans fin (17a) et à écrou (17b) est monté sur le chariot de transport (11) et est accouplé au moteur d'entraînement (15). L'écrou (17b) coopérant avec la vis à billes (17a) est fixé sur le chariot de guidage (10) du côté détourné du plan de pliage (4) par l'intermédiaire d'une bride (18) qui traverse un évidement oblong (19). En position avancée du chariot de transport (11), la moitié arrière de celui-ci comportant la vis à billes (17a) dépasse de part et d'autres des faces verticales du chariot de guidage (10), faces parallèles au plan de pliage.The invention relates to a mobile device for abutment fingers for a press brake. It comprises a support rail (8) mounted in the inner zone (5) of the press brake (1), a guide carriage (10) provided with blocking means capable of sliding along the support rail (8) and comprising two side guides (12, 13), a transport carriage (11) mounted on the guide carriage (10) and guided by the side guides (12, 13). The transport carriage (11) carries at its front end a removable stop pin (9) and at its rear end a drive motor (15). A worm (17a) and nut (17b) drive (17) is mounted on the transport carriage (11) and is coupled to the drive motor (15). The nut (17b) cooperating with the ball screw (17a) is fixed on the guide carriage (10) on the side turned away from the folding plane (4) by means of a flange (18) which passes through a recess oblong (19). In the advanced position of the transport carriage (11), the rear half thereof comprising the ball screw (17a) protrudes on either side of the vertical faces of the guide carriage (10), faces parallel to the folding plane .
Description
La présente invention concerne une presse plieuse pour tôles, munie d'un dispositif mobile de doigts de butée, ladite presse comprenant un bâti en forme de col de cygne présentant du côté frontal un tablier inférieur fixe dont la face supérieure sert de support à une matrice de pliage et un tablier supérieur verticalement mobile en alignement avec le tablier inférieur et portant par sa partie inférieure un ou plusieurs outils de pliage coopérant avec ladite matrice et situés dans un plan vertical séparant une zone intérieure de la presse plieuse d'une zone extérieure ou frontale dans laquelle l'opérateur de la presse plieuse peut travailler sans danger d'accident, alors que le dispositif mobile de doigts de butée comprend un rail de support qui est disposé dans la zone intérieure de la presse plieuse, s'étend parallèlement à la matrice de pliage et est mobile au moins verticalement, un support pour chaque doigt de butée reposant sur ledit rail et monté mobile sur ce dernier parallèlement à ladite matrice ainsi qu'un chariot susceptible de déplacer les doigts de butée au moins partiellement hors de la zone intérieure de la presse plieuse vers la zone extérieure frontale de celle-ci.The present invention relates to a press brake for sheets, provided with a mobile device of stop fingers, said press comprising a swan-neck frame having on the side front a fixed lower deck, the upper side of which serves to support a folding die and a vertically movable upper deck in alignment with the lower deck and carrying by its lower part one or more folding tools cooperating with said die and located in a vertical plane separating an interior area from the press brake an external or frontal area in which the press operator folder can work without danger of accident, while the device stop finger movable includes a support rail which is arranged in the interior area of the press brake, runs parallel to the folding die and is movable at least vertically, a support for each stop finger resting on said rail and movably mounted on the latter parallel to said matrix as well as a carriage capable move the stop fingers at least partially out of the area inside of the press brake to the front outside area of the press brake.
Une presse plieuse pour tôles du type comportant un dispositif mobile de doigts de butée est connue par la demande de brevet EP 0 650 782 A1. Dans ce cas, le rail de support est associé à un premier chariot portant ledit rail et mobile verticalement sur des glissières verticales d'un deuxième chariot mobile horizontalement et perpendiculairement au plan vertical passant par la matrice de pliage, les deux chariots étant disposés dans la zone intérieure de la presse plieuse.A press brake for sheets of the type comprising a mobile stop finger device is known from the application of Patent EP 0 650 782 A1. In this case, the support rail is associated with a first carriage carrying said rail and movable vertically on vertical slides of a second horizontally movable carriage and perpendicular to the vertical plane passing through the folding matrix, the two carriages being arranged in the interior area of the press folder.
Un inconvénient de cette disposition réside dans le fait que les supports de doigts de butée ne peuvent quitter la zone intérieure de la presse plieuse de sorte que le remplacement d'un doigt de butée oblige l'opérateur à avancer ses mains dans ladite zone intérieure et placer celles-ci entre l'outil et la matrice de pliage. Comme par ailleurs, les doigts de butée couramment utilisés ont la même longueur, ils ne peuvent pas s'adapter sans échange d'au moins un doigt de butée à une tôle dont le bord de butée est découpé en gradins ou d'une autre façon étagée. Encore un autre inconvénient du dispositif mobile de doigts de butée consiste en la nécessité du déplacement du rail de support chaque fois que le positionnement du bord de butée des tôles est modifié par rapport à la matrice de pliage.A disadvantage of this arrangement is that the stop finger supports cannot leave the interior area of the press brake so that the replacement of a stop finger forces the operator to advance his hands in said interior area and place these between the tool and the folding die. Like elsewhere, the commonly used stop fingers have the same length, they cannot adapt without exchange of at least one abutment finger to a sheet, the abutment edge of which is cut into steps or some other layered way. Yet another drawback of the device moving of stop fingers consists of the need to move the support rail each time the positioning of the stop edge of the sheet metal is changed from the folding die.
La présente invention a pour but de pallier les inconvénients connus précités et de proposer en association avec une presse plieuse un dispositif mobile de doigts de butée permettant à chaque doigt de butée de dépasser entièrement au-delà du plan vertical contenant l'arête de pliage de la matrice de pliage et d'être positionné individuellement en distance par rapport audit plan vertical.The object of the present invention is to overcome the drawbacks known above and to offer in combination with a press brake a movable stop finger device allowing each finger to abutment to protrude entirely beyond the vertical plane containing the folding edge of the folding die and being positioned individually in distance from said vertical plane.
Ce but est atteint conformément à l'invention du fait que le rail de support est monté dans la zone intérieure de la presse plieuse à une distance déterminée du plan vertical de pliage, qu'un chariot de guidage muni de moyens de blocage est susceptible de coulisser le long du rail de support et comporte à sa face supérieure deux guides latéraux s'étendant perpendiculairement au plan de pliage, qu'un chariot de transport est monté sur le chariot de guidage et est guidé par les guides latéraux de ce dernier dans ses mouvements de va-et-vient perpendiculaires audit plan de pliage, que le chariot de transport a une extension longitudinale supérieure à la largeur du chariot de guidage et porte à son extrémité frontale située du côté du plan de pliage un doigt de butée amovible et à son extrémité arrière le carter d'un moteur d'entraínement, qu'un entraínement à vis sans fin est monté sur la moitié arrière du chariot de transport par l'intermédiaire de paliers solidaires dudit chariot de transport et recevant les extrémités de ladite vis à billes, que l'extrémité arrière de ladite vis à billes qui s'étend perpendiculairement à plan de pliage est accouplée à l'arbre de sortie du moteur d'entraínement, et que l'écrou coopérant avec la vis à billes est fixé sur le chariot de guidage du côté détourné du plan de pliage par l'intermédiaire d'une bride qui traverse un évidement oblong ménagé dans le fond du chariot de transport sur toute la longueur active de la vis à billes et qu'en position avancée du chariot de transport pour laquelle le doigt de butée se trouve entièrement dans la zone extérieure frontale par rapport au plan vertical de pliage, la moitié arrière de celui-ci comportant la vis à billes dépasse de part et d'autres des faces verticales du chariot de guidage, faces parallèles au plan de pliage.This object is achieved in accordance with the invention because the support rail is mounted in the interior area of the press brake a determined distance from the vertical folding plane, which a guide provided with locking means is capable of sliding the along the support rail and has two guides on its upper face lateral extending perpendicular to the folding plane, that a transport carriage is mounted on the guide carriage and is guided by the latter's lateral guides in its back and forth movements perpendicular to said folding plane, that the transport carriage has a longitudinal extension greater than the width of the guide carriage and has a finger at its front end located on the side of the folding plane removable stopper and at its rear end the motor housing drive, that a worm drive is mounted on the rear half of the transport trolley via bearings integral with said transport carriage and receiving the ends of said ball screw, as the rear end of said ball screw which extends perpendicular to the bending plane is coupled to the output shaft of the drive motor, and that the nut cooperating with the ball screw is fixed to the guide carriage on the side diverted from the folding plane by means of a flange which crosses an oblong recess formed in the bottom of the transport trolley over the entire length active ball screw and in the advanced position of the carriage transport for which the stop finger is entirely in the frontal outer zone with respect to the vertical folding plane, the rear half of it with the ball screw protrudes from the side and others of the vertical faces of the guide carriage, faces parallel to the folding plane.
On comprendra aisément que grâce à cette conception les doigts de butée sont motorisés individuellement dans leurs mouvements perpendiculaires au plan de pliage et peuvent être amenés entièrement hors de la presse de pliage dans la zone extérieure frontale de celle-ci. Dans cette position, les doigts de butée peuvent être remplacés ou ajustés sans danger et peuvent même servir à déplacer le chariot de guidage dans une position nouvelle par rapport à son rail de support.We can easily understand that thanks to this design the stop fingers are motorized individually in their movements perpendicular to the fold plane and can be brought entirely out of the folding press into the outside area front of it. In this position, the stop fingers can be replaced or adjusted safely and can even be used to move the guide carriage to a new position relative to its support rail.
Selon un mode préféré de réalisation de l'invention, chaque doigt de butée est monté sur un porte-doigt, les moyens de solidarisation du porte-doigt à l'extrémité frontale du chariot de transport comportent des moyens formant un axe de pivotement pour ledit porte-doigt par rapport audit chariot de transport, ledit axe de pivotement s'étendant selon une direction orthogonale à celle de déplacement dudit chariot de transport.According to a preferred embodiment of the invention, each stop finger is mounted on a finger holder, the means for securing the finger holder at the front end of the carriage transport comprise means forming a pivot axis for said finger holder relative to said transport carriage, said axis of pivoting extending in a direction orthogonal to that of displacement of said transport carriage.
De préférence également, lesdits moyens de solidarisation du porte-doigt comprennent des moyens de verrouillage dudit porte-doigt sur l'extrémité frontale dudit chariot de transport, lesdits moyens de verrouillage étant aptes à être déverrouillés sous l'effet d'une contrainte excessive appliquée audit doigt.Preferably also, said means of securing of the finger holder comprise means for locking said finger holder on the front end of said transport cart, said means being able to be unlocked under the effect of a excessive stress applied to said finger.
De préférence encore, lesdits moyens de solidarisation comprennent deux pions coaxiaux disposés selon ledit axe de pivotement dont une extrémité est engagée dans un alésage du porte-doigt et dont la deuxième extrémité est engagée dans un alésage de l'extrémité frontale du chariot, ladite deuxième extrémité des pions étant chanfreinée, une partie de l'extrémité chanfreinée étant engagée dans l'alésage de l'extrémité frontale dudit chariot de transport et maintenue dans cette position par un ressort de rappel, par quoi sous l'effet d'une contrainte excessive appliquée audit doigt, les ressorts de rappel sont comprimés et permettent aux deuxième extrémités desdits pions de sortir desdits alésages autorisant ainsi la désolidarisation dudit porte-doigt par rapport audit chariot de transport.More preferably, said means of securing include two coaxial pins arranged along said axis of pivoting of which one end is engaged in a bore of the finger holder and the second end of which is engaged in a bore of the front end of the carriage, said second end of the pins being chamfered, part of the chamfered end being engaged in the bore of the front end of said transport carriage and held in this position by a return spring, whereby under the effect of excessive stress applied to said finger, the springs of booster are compressed and allow the second ends of said pins to exit from said bores thus authorizing separation said finger holder relative to said transport trolley.
D'autres caractéristiques de l'invention ressortiront de la
description d'un mode de réalisation donné à titre d'exemple non
limitatif, cette description étant faite en référence aux dessins annexés
sur lesquels
Sur la figure 1 est représentée schématiquement une joue
latérale verticale 1 d'un bâti en forme de col de cygne comportant du
côté frontal un tablier inférieur fixe 2 dont la face supérieure sert de
support à une matrice de pliage 3, ainsi qu'un tablier supérieur (non
représenté) verticalement mobile en alignement avec le tablier
inférieur 2 et portant par sa partie inférieure un ou plusieurs outils de
pliage coopérant avec ladite matrice 3.In Figure 1 is shown schematically a cheek
vertical lateral 1 of a frame in the form of a swan neck comprising
front side a fixed
Les tabliers inférieur et supérieur 2 avec respectivement leur
matrice 3 et leurs outils de pliage définissent un plan vertical dit de
pliage 4 séparant une zone intérieure de presse plieuse 5 d'une zone
extérieure frontale 6 dans laquelle l'opérateur de la presse plieuse peut
travailler sans risque de blessures corporelles.The lower and
Le dispositif de doigts de butée 7 est normalement disposé
dans la zone intérieure 5 de la presse plieuse entre les joues latérales
du bâti et derrière le plan de pliage 4.The
Ce dispositif 7 comprend un rail de support 8 qui s'étend
horizontalement et parallèlement à la matrice 3 et au plan vertical de
pliage 4. Le rail de support 8 peut occuper une position fixe en ce qui
concerne sa distance par rapport au plan vertical de pliage 4, cette
distance étant telle qu'en position reculée du doigt de butée 9
l'extrémité frontale de ce dernier se trouve dans la zone intérieure de la
presse plieuse et est voisine du plan de pliage 4, mais ne dépasse pas
celui-ci. Le rail de support 8 peut le cas échéant être mobile dans le
sens vertical pour s'adapter à la hauteur de la matrice de pliage 3. Il
pourrait aussi être déplaçable dans une direction perpendiculaire au
plan de pliage 4 pour permettre aux doigts de butée 9 de prendre des
distances différentes par rapport audit plan 4.This
Chaque doigt de butée 9 est associé à un chariot 10 qui est
monté de façon coulissante sur le rail de support 8 par rapport auquel
il peut être bloqué dans une position choisie après y avoir été déplacé
parallèlement à la matrice de pliage 3. Le premier chariot 10 de
guidage permet non seulement aux doigts 9 de se déplacer le long du
rail de support 8 mais sert en plus de support et de guidage à un
chariot de transport 11 monté mobile sur le chariot de guidage 10 de
façon à pouvoir se déplacer horizontalement et perpendiculairement au
plan de pliage 4. Le chariot de transport 11 est guidé par deux guides
latéraux 12, 13 du chariot de guidage 10, ces guides latéraux 12, 13
étant disposés sur la face supérieure du chariot de guidage 10 et
s'étendant horizontalement et perpendiculairement au plan vertical de
pliage 4.Each
L'extrémité arrière du doigt de butée 9 est portée par la
partie frontale du chariot de transport 11 dont la longueur et la course
maximale tiennent compte de la position du rail de support 8 et du
chariot de guidage 10 qui lui est associé afin que, d'une part, en
position de fin de course avant ledit chariot de transport 11, le doigt de
butée 9 et la partie frontale dudit chariot se trouvent, au-delà du plan
vertical de pliage 4, entièrement dans la zone extérieure frontale 6 et
que, d'autre part, en fin de course arrière, ledit chariot de transport 11
et l'extrémité frontale du doigt de butée 9 se trouvent entièrement dans
la zone intérieure 5 de la presse plieuse 1.The rear end of the
On remarquera que la longueur du chariot de transport 11
est au moins le double de la largeur du chariot de guidage 10, largeur
prise dans le sens de la longueur dudit chariot de transport 11. Pour
des raisons d'équilibre, il est cependant souhaitable que cette longueur
ne dépasse pas le triple de la largeur du chariot de guidage 10. It will be noted that the length of the
A son extrémité arrière, le chariot de transport 11 comporte
une cloison transversale 14 sur laquelle est fixé le carter d'un moteur
d'entraínement 15 dont l'arbre de sortie est raccordé par un
accouplement 16 à l'extrémité arrière d'un mécanisme
d'entraínement 17 comprenant une vis sans fin à billes 17a et un
écrou 17b qui coopère avec ladite vis à billes 17a. L'écrou 17b est
rendu immobile en rotation et en translation par rapport à la vis à
billes 17a à l'aide d'une bride verticale 18 fixée à la fois à l'écrou 17b
et sur le côté 10a du chariot de guidage 10, côté 10a détourné du plan
de pliage 4.At its rear end, the
La bride 18 traverse un évidement oblong 19 ménagé dans
le fond du chariot de transport 11 sur toute la longueur active de la vis
à billes 17a qui s'étend perpendiculairement au plan vertical de
pliage 4. La vis à billes 17a est disposée dans la partie arrière du
chariot de transport 11, cette partie arrière étant légèrement plus
longue que la moitié arrière dudit chariot 11. Les extrémités de la vis à
billes sont logées dans des paliers à roulements 20, 21 qui empêchent
ladite vis 17a de se déplacer axialement et qui sont solidaires du
chariot de transport 11 et s'appuient contre les extrémités de deux
nervures de rigidification 22, 23 prévues de part et d'autre de
l'évidement oblong 19 du chariot 11.The
Comme on peut le voir sur les dessins, la partie arrière du
chariot de transport 11, partie comportant la vis à billes 17a, recouvre
entièrement le chariot de guidage 10, lorsque ledit chariot de
transport 11 se trouve en position avancée dans laquelle au moins le
doigt de butée 9 se situe entièrement et de préférence aussi la partie
avant dudit chariot 11 dans la zone extérieure frontale 6 devant le plan
vertical de pliage 4. Par contre, en position reculée du chariot de
transport 11, c'est sa partie avant qui recouvre le chariot de guidage 10
et sa partie arrière est en porte-à-faux par rapport à ce dernier, le
basculement du chariot de transport 11 étant empêché par les guides
latéraux 12, 13 du chariot de guidage 10. Dans cette position reculée
du chariot de transport 11, le doigt de butée 9, y compris son extrémité
frontale, se trouve dans la zone intérieure 5 de la presse plieuse 1.As can be seen in the drawings, the rear part of the
A son extrémité frontale, le chariot de transport 11
comprend une échancrure 24 dans laquelle est logée la queue arrière
25 d'un porte-doigt 26 dont l'extrémité frontale est également munie
d'un évidement 27 recevant la queue arrière du doigt de butée 9
sollicité contre les têtes bombées de deux vis d'appui 40a et 40b
engagées dans le porte-doigt 26 au moyen d'une vis de tension 28
dont la tête prend appui contre le fond d'un trou oblong 29 ménagé
dans la queue 25 du porte-doigt 26.At its front end, the
L'extrémité arrière de la queue 25 du porte-doigt 26 est
articulée par un axe 30 sur les bras latéraux de l'échancrure 24 dont le
fond est biseauté de telle sorte que ladite queue 25 puisse s'échapper
vers le haut en basculant autour de l'axe 30 dans le sens des aiguilles
d'une montre.The rear end of the
De préférence, comme le montre la figure 2A, l'axe 30, qui
est orthogonal à la direction de déplacement du chariot 11, est réalisé
par deux pions 41a et 41b. La première extrémité 42 de chaque pion
est engagée dans un alésage 43 ménagé dans la queue 25 du porte-doigt
26. L'autre extrémité 44 de chaque pion est chanfreinée. Cette
deuxième extrémité 44 chanfreinée pénètre partiellement dans un
alésage 45 réalisé dans les bras 46 et 47 de l'extrémité frontale du
chariot 11, bras qui sont définis par l'échancrure 24. La deuxième
extrémité 44 des pions 41a et 41b est maintenue partiellement engagée
dans les alésages 45 par des moyens de rappel 48 constitués de
préférence par des rondelles Belleville.Preferably, as shown in FIG. 2A, the
On comprend qu'ainsi les pions 41a et 41b remplissent une
double fonction : d'une part, ils constituent l'axe de pivotement 30 du
doigt de butée 9 par rapport au chariot 11, d'autre part, ils forment un
système de verrouillage du porte-doigt 26 sur l'extrémité frontale
(bras 46 et 47) du chariot de transport 11, ce système pouvant être
déverrouillé sous l'effet d'une contrainte excessive appliquée au doigt
9. En effet, dans ce cas, les moyens de rappel 48 sont comprimés de
telle manière que les extrémités chanfreinées 44 des pions 41a et 41b
sortent des alésages 45, libérant ainsi le porte-doigt 26 et donc le
doigt 9.We understand that thus the
La fonction de pivotement du doigt autour de l'axe 30
permet à celui-ci de suivre le déplacement vertical du bord de la tôle
appliqué contre le doigt sous l'effet de l'action de pliage appliqué à la
tôle par la coopération du Vé de pliage fixe et du poinçon. Sans cette
possibilité de pivotement, le doigt de butée 9 introduirait dans la tôle
une contrainte parasite durant l'opération de pliage.The function of pivoting the finger around the
La fonction de déverrouillage permet d'éviter qu'en cas de fausses manoeuvres, des contraintes excessives ne soient appliquées aux différents organes du chariot de guidage et du chariot de transfert.The unlocking function makes it possible to avoid that in the event of wrong maneuvers, excessive constraints are applied to the various parts of the guide carriage and the transfer carriage.
Enfin, il faut préciser que, de préférence, le chariot de
transfert 11 comporte une pièce 50 formant une face de butée
additionnelle 51 venant s'ajouter aux faces de butées constituées par
l'extrémité terminale 52 du doigt 9 et par l'épaulement 53 de ce même
doigt. La face de butée additionnelle 51 permet de traiter des tôles
pour lesquelles la distance entre le bord au contact de la face de butée
et la ligne de pliage est supérieure à la distance maximale entre le
doigt de butée 9 lui-même en position rentrée maximale et le Vé de
pliage.Finally, it should be noted that, preferably, the
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0106798 | 2001-05-23 | ||
FR0106798A FR2825036B1 (en) | 2001-05-23 | 2001-05-23 | BENDING PRESS FOR SHEETS, PROVIDED WITH A MOBILE STOP DEVICE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1264647A1 true EP1264647A1 (en) | 2002-12-11 |
EP1264647B1 EP1264647B1 (en) | 2008-03-19 |
Family
ID=8863594
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02291151A Expired - Lifetime EP1264647B1 (en) | 2001-05-23 | 2002-05-07 | Press brake for sheets with a movable workpiece stop device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1264647B1 (en) |
DE (1) | DE60225625T2 (en) |
FR (1) | FR2825036B1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103894504A (en) * | 2014-04-03 | 2014-07-02 | 上海新力机器厂 | Double-X-axis rear retaining device for large-tonnage bending machine |
FR3040643A1 (en) * | 2015-09-08 | 2017-03-10 | Amada Europe | DEVICE FOR MECHANICAL CONTACT, SUCH AS REAR STOPS FOR A PRESSER |
CN108405686A (en) * | 2018-03-26 | 2018-08-17 | 奥美森智能装备股份有限公司 | The hunting gear of bender |
CN114034578A (en) * | 2021-11-11 | 2022-02-11 | 詹清 | Special circuit board bending resistance test machine |
Families Citing this family (8)
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---|---|---|---|---|
CN103480765B (en) * | 2013-09-10 | 2015-10-21 | 西安交通大学 | A kind of telescopic pay-off of linear motor direct-driven of cladding element punching product line |
AT519203B1 (en) * | 2016-10-14 | 2018-10-15 | Trumpf Maschinen Austria Gmbh & Co Kg | Backgauge for a bending machine |
CN110639997B (en) * | 2019-09-30 | 2023-12-29 | 凌云西南工业有限公司 | Conveying mechanism for A-column roll bending device |
CN111389993A (en) * | 2020-04-17 | 2020-07-10 | 马鞍山市绿之友机械制造有限公司 | Twisting forming machine and method for cutter bar of grass rolling cutter |
CN112304781A (en) * | 2020-11-04 | 2021-02-02 | 西安航天动力测控技术研究所 | A kind of bending test device and using method |
CN112705637B (en) * | 2020-12-31 | 2024-12-20 | 昆山乙盛机械工业有限公司 | A loading and unloading mechanism and bending die |
CN113877997B (en) * | 2021-09-26 | 2024-04-19 | 珠海富士智能股份有限公司 | Bending method |
CN114472626B (en) * | 2021-12-16 | 2025-01-24 | 湖北勋基建筑工程有限公司 | A low deformation plate rolling machine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3733885A (en) * | 1971-04-19 | 1973-05-22 | E Brauer | Automatic press brake back gauge |
US4366689A (en) * | 1979-03-05 | 1983-01-04 | Kabushiki Kaisha Komatsu Seisakusho | Numerical control method |
EP0650782A1 (en) * | 1993-10-08 | 1995-05-03 | Trumpf GmbH & Co | Press brake |
-
2001
- 2001-05-23 FR FR0106798A patent/FR2825036B1/en not_active Expired - Fee Related
-
2002
- 2002-05-07 EP EP02291151A patent/EP1264647B1/en not_active Expired - Lifetime
- 2002-05-07 DE DE2002625625 patent/DE60225625T2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3733885A (en) * | 1971-04-19 | 1973-05-22 | E Brauer | Automatic press brake back gauge |
US4366689A (en) * | 1979-03-05 | 1983-01-04 | Kabushiki Kaisha Komatsu Seisakusho | Numerical control method |
EP0650782A1 (en) * | 1993-10-08 | 1995-05-03 | Trumpf GmbH & Co | Press brake |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103894504A (en) * | 2014-04-03 | 2014-07-02 | 上海新力机器厂 | Double-X-axis rear retaining device for large-tonnage bending machine |
CN103894504B (en) * | 2014-04-03 | 2016-01-06 | 上海新力机器厂 | For two X-axis rear material stopping devices of large-tonnage bender |
FR3040643A1 (en) * | 2015-09-08 | 2017-03-10 | Amada Europe | DEVICE FOR MECHANICAL CONTACT, SUCH AS REAR STOPS FOR A PRESSER |
EP3141309A1 (en) | 2015-09-08 | 2017-03-15 | Amada Europe | Releasable stop pin |
US9682416B2 (en) | 2015-09-08 | 2017-06-20 | Amada Europe | Mechanical contact device, such as a back stop for a press brake |
CN108405686A (en) * | 2018-03-26 | 2018-08-17 | 奥美森智能装备股份有限公司 | The hunting gear of bender |
CN108405686B (en) * | 2018-03-26 | 2024-02-23 | 奥美森智能装备股份有限公司 | Follow-up device of bending machine |
CN114034578A (en) * | 2021-11-11 | 2022-02-11 | 詹清 | Special circuit board bending resistance test machine |
CN114034578B (en) * | 2021-11-11 | 2024-05-24 | 广东君治电子有限公司 | Special circuit board bending resistance testing machine |
Also Published As
Publication number | Publication date |
---|---|
EP1264647B1 (en) | 2008-03-19 |
FR2825036A1 (en) | 2002-11-29 |
DE60225625T2 (en) | 2009-04-02 |
FR2825036B1 (en) | 2003-09-19 |
DE60225625D1 (en) | 2008-04-30 |
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