EP2177292B1 - Device for straightening and feeding a semi-rigid band of material into a machine - Google Patents

Device for straightening and feeding a semi-rigid band of material into a machine Download PDF

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Publication number
EP2177292B1
EP2177292B1 EP09360045A EP09360045A EP2177292B1 EP 2177292 B1 EP2177292 B1 EP 2177292B1 EP 09360045 A EP09360045 A EP 09360045A EP 09360045 A EP09360045 A EP 09360045A EP 2177292 B1 EP2177292 B1 EP 2177292B1
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EP
European Patent Office
Prior art keywords
cam
opening
straightening rolls
closing
strip
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EP09360045A
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German (de)
French (fr)
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EP2177292A1 (en
Inventor
Laurent Boeuf
Marc Aubry
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Dimeco Alipresse SAS
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Dimeco Alipresse SAS
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Publication of EP2177292A1 publication Critical patent/EP2177292A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
    • B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material
    • 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
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/02—Straightening

Definitions

  • the present invention relates to a device for straightening and feeding a strip of semi-rigid material in a machine, in particular a metal sheet in a press or the like, the device comprising at least one lower frame carrying a set of rollers lower straighteners, an upper frame carrying a set of upper straightening rollers arranged in staggered relation to the lower straightening rollers, traction means of the material strip arranged upstream and downstream of said straightening roll sets, means for adjusting the straightening rollers; position of the upper straightening rollers with respect to the lower straightening rollers, and opening and closing means of said upper and lower stretches arranged for, in the closed position, to clamp the strip of material between the upper and lower straightening rollers, and in position opening, release the material web constraints of said rectifier rollers.
  • semi-rigid material strip is not limited to a strip itself having a certain width, but also to a wire, a cable, a strand or the like.
  • the invention applies to any type of semi-rigid material and in particular sheet metal.
  • One of the particular applications concerns the work of metal sheets wound in coils, which feed lines of cutting, punching, stamping, folding, etc. to manufacture metal parts for example for the automotive industry.
  • presses or the like fed by a reel of reels, a steel straightener which unrolls the sheet of its reel and straightens it to remove its bending, and a device for stepwise advance of the sheet in the press which alternately holds and releases the sheet according to the advance and cutting cycles of the press.
  • the rectifier and the feed device are separate modules and separated by a sheet supply to ensure continuous operation of the press, or form a single machine , commonly called "straightener-feed", the sheet reserve being located upstream at the reel
  • the invention relates more particularly to this type of machine which combines the straightening of the sheet and the supply of this sheet in the press.
  • This machine has a function commonly called "pinching-out" of the sheet, synchronized with the feeding and cutting cycles of the press.
  • the sheet is clamped between the lower rectifier rollers and the upper rectifier rollers to undergo the straightening operation.
  • the cutting or stamping phase of the sheet in the press it is necessary to release the sheet of its stresses, thus to peel the sheet, to allow its automatic repositioning in the press tool.
  • the stripping function is performed by opening the upper apron in a rotational movement about a pivot axis offset on one side of the aprons in the manner of a jaw, or by lifting the upper apron in a vertical translation movement along specific guide columns.
  • These movements are generated by hydraulic or electromechanical actuators, which necessarily require a power supply to maintain the pinched position.
  • These mechanisms are bulky, complex to implement and very expensive both in need of equipment than in need of energy. Moreover, they generate a strong inertia and are therefore limited in rhythm. They are not suitable for equipping machines already in service. In these machines, the straightening rolls can be carried by a single cradle, which prohibits the individual adjustment of the penetration of each of the rectifier rollers.
  • the present invention aims at overcoming these disadvantages by proposing a "rectifier-feeder” device provided with a “pinching-stripping" function performed by compact, simple, economical, reliable means, generating a very low inertia, so that it can respond to high speeds, not requiring energy to maintain the pinched position, which can be adapted to machines already in use, while allowing a precise and individual adjustment of the penetration of each of the rectifier rollers.
  • the invention relates to a device of the type indicated in the preamble, characterized in that said means for opening and closing said chassis are integrated with said position adjustment means of the upper rectifier rollers, are arranged to move the frame upper relative to the lower frame in a translation movement perpendicular to said frame, and comprise the guide members in vertical translation of said adjusting means.
  • the mechanical means used to add the pinch-out function to a straightening device are optimized by using the vertical translation guide function already present in the position adjustment means of the straightening rollers.
  • the means for opening and closing the frames comprise a lifting module arranged between the upper frame and the upper rectifying rollers, and coupled to at least one mechanism lifting device arranged to move the lifting module, and simultaneously the upper frame and the upper rectifier rollers, in vertical translation between said closing and opening positions and vice versa.
  • the lifting mechanism advantageously comprises at least one cam driven in rotation about a fixed axis of rotation by at least one actuator, this cam cooperating with at least one rolling member secured to said lifting module and having a cam profile arranged to that the closed position corresponds to a stable state of the device and that the open position corresponds to a temporary unstable state of this device.
  • the cam comprises two first flats separated by an angle of about 90 ° and connected by a first substantially circular sector, this cam cooperating with a first upper rolling member and secured to the module lifting, so that the first substantially circular sector defines the unstable opening position of the device and that the first flats form rolling ramps on which runs the upper rolling member between the closed and open positions.
  • This cam advantageously comprises a second flat diametrically opposed to the first substantially circular sector and connected to the first flats by second substantially circular sectors, this cam cooperating with a second lower rolling member, integral with the lifting module and diametrically opposite the body of upper bearing, so that the second substantially circular sectors define the stable closing position of the device.
  • the interval separating the two upper and lower running members integral with said lifting module is advantageously greater than the largest transverse dimension of the cam and provides a clearance defining the opening stroke of said device.
  • the lifting mechanism may comprise at least one control lever articulated on the one hand to the actuator and on the other hand to the fixed axis of rotation of the cam.
  • the lifting mechanism comprises two actuators mounted in opposition on a fixed frame, each actuator being coupled to the fixed axis of rotation of a cam by a control lever, the actuators being mechanically connected to operate in opposition and add up their efforts.
  • These actuators may be chosen from the group comprising a bistable pneumatic cylinder, a servomotor, this list not being exhaustive.
  • the traction means of the material web preferably comprise clean opening and closing means and a central control unit is arranged to simultaneously control the means for opening and closing the chassis. and the means for opening and closing these traction means.
  • the device 1 for straightening and feeding a strip of semi-rigid material 2 in a machine according to the invention, in particular a metal sheet in a press or the like comprises, in a manner known and with reference to the figures, a lower chassis 3 carrying a set of lower rectifier rollers 30, an upper chassis 4 carrying a set of upper rectifier rollers 40 arranged in staggered relation to the lower rectifier rollers 30, traction means 5 of the web of material 2 arranged upstream and downstream of said set of rectifying rollers 30, 40 and adjusting means 6 of the vertical position of the upper rectifier rollers 40 with respect to the lower rectifier rollers 30 having guide members 60 in vertical translation of each upper rectifier roll 40.
  • the lower frame 3 is fixed and constitutes the supporting structure of the entire device 1. It carries a set of four parallel lower straightening rollers, aligned in the same horizontal plane, separated by a regular spacing and driven in rotation by a set of motor pinions 31 meshing with receiving gears 32 provided at one end of each lower rectifier roll 30 (cf. Fig. 5 and 7 ).
  • the upper frame 4 is movable and carries a set of three upper rectifier rollers 40, parallel, separated by a regular spacing equal to that of the lower rectifier rollers 30 but interposed between them.
  • Adjacent lower straighteners 30 is adjustable to adjust the degree of straightening to a given material band.
  • each upper rectifier roll 40 is carried at its two ends by two guide members 60 having bearings and sliding in two housings 61 provided in the lower frame 3.
  • the means of adjustment in position 6 comprise for each upper rectifier roll 40 two threaded rods 62 extending vertically through said upper frame 4 and provided with a lower end 63 in engagement with each guide member 60 and an upper end 64 with an impression to be maneuvered by a suitable tool 65 which can be manual or automatic.
  • the screwing and unscrewing of the threaded rods 62 generates the descent and the rise of the corresponding upper rectifier roll 40.
  • the threaded rods 62 are mechanically coupled by a pinion gear 66 and chain 67.
  • the traction means 5 of the strip of material 2 arranged upstream and downstream of the sets of rectifying rollers 30, 40 comprise in known manner each a fixed lower tractor roll 50 carried by the lower chassis 3, an upper mobile tractor roller 51 by a bearing 52 sliding in a housing 53 of the lower chassis 3.
  • An actuator 54 such as a motor is coupled to at least one of the lower tractor rollers 50, meshing with the driving pinions 32 to rotate the lower rectifier rollers 30.
  • They also include means for opening and closing 55 of the upper tractor roller 51 relative to the tractor roller 50 arranged for the closed position to clamp the strip of material to advance it and in the open position to release the strip of material.
  • These opening and closing means 55 comprise actuators arranged at the right of each end of the upper tractive rollers 51 and controlled by a central control unit (not shown).
  • These actuators are, in the example shown, constituted by cylinders 55 preferably pneumatic whose rod 56 is engaged with the sliding bearing 52, but can be replaced by servomotors or any other known actuator pneumatic, hydraulic or electrical.
  • the device 1 for straightening and feeding a strip of material 2 in a machine comprises means for opening and closing 7 of the upper frame 4 and lower 3 arranged for, in the closed position, to pinch the Band material 2 between the upper and lower rectifier rollers 40, and in the open position, release the material web 2 from the stresses of the straightening rollers 30, 40.
  • These opening and closing means 7 of the frames 3, 4 are controlled by the central control unit (not shown) simultaneously with the traction means 5 to be able to release the material strip 2 from any constraint.
  • the opening and closing means 7 are different from the prior art in that they are integrated with the adjustment means 6 of the position of the upper rectifier rollers 40 and are arranged to move the mobile upper frame 4 and the rectifier rollers. 40 in relation to the lower fixed chassis 3 and lower rectifier rollers 30 in a translation movement perpendicular to said frame 3 and 4. They use the guide members 60 in vertical translation of the adjustment means 6.
  • they comprise a lifting module 70 arranged between the upper frame 4 and the upper rectifying rollers 40, and coupled to a lifting mechanism 71, 72 arranged to move the lifting module 70, simultaneously driving the upper frame 4 and the set of rollers upper straighteners 40, in vertical translation between the closed position corresponding to the clamping function of the stripe of m 2 and the open position corresponding to the stripping function of the material web 2.
  • the lifting mechanism comprises at least one cam 71 and preferably two cams 71 parallel, spaced apart from each other and arranged in the zones d end of the lifting module 70 to distribute the forces.
  • Each cam 71 is rotated about a fixed axis of rotation A by at least one actuator 72, the fixed axis of rotation A and the actuator 72 being carried by a fixed frame 73 extending the lower frame 3.
  • the Actuator 72 is in the example shown constituted by a bistable pneumatic cylinder. Any other actuator 72 may be suitable, for example a servomotor.
  • the lifting mechanism comprises two cylinders 72 mounted in opposition to the fixed frame 73 and mechanically connected to operate in opposition and add up their efforts. More particularly, each jack 72 is mounted on the fixed frame 73 by a hinge pin F and the rods 76 of the two cylinders 72 are interconnected by an assembly of articulated stirrups 77. Each cam 71 is rotated by a control lever 78 coupled on the one hand to the corresponding actuator 72 by a hinge G provided on one of the stirrups 77 and on the other hand to the fixed axis of rotation A of the cam 71.
  • Each cam 71 is disposed between an upper rolling member 74 and a lower rolling member 75, consisting respectively of an upper roller and a lower roller, diametrically opposed and rotatable about integral axes of rotation of the module. 70 and parallel to the fixed axis of rotation of the cam 71.
  • the interval E between the rolling members 74, 75 is greater than the largest transverse dimension D of the cam 71 and provides a clearance which is for example a few millimeters and which defines the opening stroke C of the device 1 (cf. Fig. 2 ).
  • Each cam 71 has a cam profile arranged so that the closed position corresponds to a stable state of the device 1 and the open position corresponds to an unstable temporary state of said device. More particularly, each cam 71 has two first flats 711 separated by an angle of about 90 ° and connected by a first substantially circular sector 712, which cooperate with the upper rolling member 74 secured to the lifting module 70, so that that the first substantially circular sector 712 defines the open position of the device 1 (cf. Fig. 2 ) and that the first flats 711 form rolling ramps on which this upper rolling member 74 circulates between the closed and open positions. In the closed position (cf. Fig. 1 and 3 ), the first flats 711 delimit with the upper rolling member 74 a clearance corresponding to the opening stroke C of the device 1.
  • Each cam 71 also has a second flat 713 diametrically opposed to the first substantially circular sector 712 and connected to the first flats 711 by second substantially circular sectors 714 which cooperate with the lower rolling member 75 integral with the lifting module 70 to define the position stable closure of the device 1.
  • the second flat 713 defines with the lower rolling member 75 a clearance corresponding to the opening stroke C of the device 1.
  • the lifting module 70 is guided in vertical translation both by the guide members 60 of the rollers upper straighteners 40 and the side portions of the fixed frame 73 which are not shown in the figures.
  • the device 1 is in the stable closed position, the material strip 2 is clamped between the lower rectifier rollers 30 and the upper rectifier rollers 40 and undergoes a straightening step during its advance.
  • the jack 72 on the right is in the stable retracted position and the jack 72 on the left in the stable output position, the control levers 78 are oriented to the right and the cams 71 are tangentially supported by their second sector 714 on the lower running gear.
  • 75 now the lifting module 70 in the low position and simultaneously the upper frame 4 and the upper rectifier rollers 40 in the stable position and without energy. In this position, the clearance corresponding to the opening stroke C is situated between the first flat surface 711 corresponding to the cams 71 and the upper rolling members 74.
  • the figure 2 represents the device 1 in unstable and temporary opening position, in which the strip of material 2 no longer advances and is released from the constraints of the rectifier rollers 30 and 40 and can self-center relative to the press tools.
  • the cylinders 72 are in operation and under pressure, the right cylinder is in the partially extended position and the left cylinder in the partially retracted position, the control levers 78 have rotated about 1 ⁇ 4 of a turn in the direction of the leading arrow R1. with them the cams 71.
  • the second sector 714 of the cams 71 leaves the lower rolling members 75, and the first flat 711 of the cams 71 meets the upper rolling members 74 causing the vertical lifting of the lifting module 70 in the up position and simultaneously of the upper frame 4 and the upper rectifier rollers 40, until reaching the first sector 712 of the cams 71 corresponding to the maximum opening stroke C and defining the unstable, temporary and energy-free opening position .
  • the clearance corresponding to the opening stroke C is transferred between the corresponding second flat 713 of the cams 71 and the lower rolling members 75.
  • the figure 3 illustrates the device 1 income in stable closed position, the material strip 2 is again pinched between the lower rectifier rollers 30 and the upper rectifier rollers 40 to continue the straightening step during its advance.
  • the cylinders 72 continued their work in the same direction, the right cylinder being in the stable output position and the left cylinder in the stable retracted position, the control levers 78 continued their rotation about 1 ⁇ 4 turn in the direction of the arrow R2 driving with them the cams 71.
  • the first sector 712 of the cams 71 leaves the upper rolling members 74 which roll on the other first flat 711 of the cams 71 causing the vertical lowering of the module lifting 70 in the low position and simultaneously the upper frame 4 and the upper rectifier rollers 40 until the second sector 714 of the cams 71 meets the lower rolling members 75 corresponding to the stable closed position and without energy.
  • the cylinders 72 are fed in the opposite direction.
  • the angular displacement of the cams 71 is limited to one angle of about 90 ° which is sufficient to generate these cycles. In fact, it is easy to understand that this mechanism has a very fast response time enabling it to reach high cycle rates.
  • the parts, subassemblies and assemblies composing the device 1 according to the invention are produced by reproducible industrial processes.
  • This device 1 is not limited to the straightening of a sheet and the supply of this rectified sheet in a press, but extends to any other application requiring these straightening and feeding functions in any type of machine.
  • the invention achieves the goals.
  • it makes it possible to perform the "pinching / peeling" function grafted onto a straightening machine by means of an optimized mechanism by means of which the clamping function is stable and without energy input.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

The device (1) has an opening and closing unit opening and closing an upper frame (4) and a lower frame (3) and integrated with an adjusting unit (6). The adjusting unit adjusts position of upper straightening rolls (40), and moves the upper frame relative to the lower frame in a translation movement perpendicular to the frames. The adjusting unit comprises guiding elements (60) for guiding the upper straightening rolls in vertical translation. An actuator (72) e.g. servomotor, is coupled to a fixed rotation axle (A) of a cam (71).

Description

Domaine technique:Technical area:

La présente invention concerne un dispositif de redressage et d'amenée d'une bande de matière semi-rigide dans une machine, notamment d'une tôle métallique dans une presse ou similaire, le dispositif comportant au moins un châssis inférieur portant un jeu de rouleaux redresseurs inférieurs, un châssis supérieur portant un jeu de rouleaux redresseurs supérieurs disposés en quinconce par rapport aux rouleaux redresseurs inférieurs, des moyens de traction de la bande de matière disposés en amont et en aval desdits jeux de rouleaux redresseurs, des moyens de réglage de la position des rouleaux redresseurs supérieurs par rapport aux rouleaux redresseurs inférieurs, et des moyens d'ouverture et de fermeture desdits châssis supérieur et inférieur agencés pour, en position de fermeture, pincer la bande de matière entre les rouleaux redresseurs inférieurs et supérieurs, et en position d'ouverture, libérer la bande matière des contraintes desdits rouleaux redresseurs.The present invention relates to a device for straightening and feeding a strip of semi-rigid material in a machine, in particular a metal sheet in a press or the like, the device comprising at least one lower frame carrying a set of rollers lower straighteners, an upper frame carrying a set of upper straightening rollers arranged in staggered relation to the lower straightening rollers, traction means of the material strip arranged upstream and downstream of said straightening roll sets, means for adjusting the straightening rollers; position of the upper straightening rollers with respect to the lower straightening rollers, and opening and closing means of said upper and lower stretches arranged for, in the closed position, to clamp the strip of material between the upper and lower straightening rollers, and in position opening, release the material web constraints of said rectifier rollers.

Un tel dispositif est décrit par exemple, dans le document US-A-2008098786 .Such a device is described for example in the document US-2008098786 .

Technique antérieure :Prior art:

Le terme de « bande de matière semi-rigide » n'est pas limité à une bande proprement dite ayant une certaine largeur, mais aussi à un fil, un câble, un toron ou similaire. De même, l'invention s'applique à tout type de matière semi-rigide et en particulier de la tôle métallique. Une des applications particulières concerne le travail des tôles métalliques enroulées en bobines, qui alimentent des lignes de découpe, poinçonnage, emboutissage, pliage, etc. pour fabriquer des pièces métalliques par exemple pour l'industrie automobile. Dans ce domaine d'application, on utilise des presses ou similaires alimentées par un dévidoir de bobines, un redresseur de tôles qui déroule la tôle de sa bobine et la redresse pour lui enlever son cintrage, et un dispositif d'avance pas à pas de la tôle dans la presse qui alternativement maintient et libère la tôle en fonction des cycles d'avance et de coupe de la presse.The term "semi-rigid material strip" is not limited to a strip itself having a certain width, but also to a wire, a cable, a strand or the like. Similarly, the invention applies to any type of semi-rigid material and in particular sheet metal. One of the particular applications concerns the work of metal sheets wound in coils, which feed lines of cutting, punching, stamping, folding, etc. to manufacture metal parts for example for the automotive industry. In this field of application, presses or the like fed by a reel of reels, a steel straightener which unrolls the sheet of its reel and straightens it to remove its bending, and a device for stepwise advance of the sheet in the press which alternately holds and releases the sheet according to the advance and cutting cycles of the press.

En fonction de la longueur de la ligne de fabrication, le redresseur et le dispositif d'avance sont des modules distincts et séparés par une réserve de tôle pour assurer un fonctionnement en continu de la presse, ou ne forment qu'une seule et même machine, appelée communément « redresseur-amenage », la réserve de tôle étant située en amont au niveau du dévidoirDepending on the length of the production line, the rectifier and the feed device are separate modules and separated by a sheet supply to ensure continuous operation of the press, or form a single machine , commonly called "straightener-feed", the sheet reserve being located upstream at the reel

L'invention concerne plus particulièrement ce type de machine qui combine le redressage de la tôle et l'amenée de cette tôle dans la presse. Cette machine comporte une fonction appelée communément de « pinçage-dépinçage » de la tôle, synchronisée avec les cycles d'alimentation et de coupe de la presse. Pendant la phase d'alimentation de la presse, la tôle est pincée entre les rouleaux redresseurs inférieurs et les rouleaux redresseurs supérieurs pour subir l'opération de redressage. Pendant la phase de coupe ou d'emboutissage de la tôle dans la presse, il est nécessaire de libérer la tôle de ses contraintes, donc de dépincer la tôle, pour permettre son repositionnement automatique dans l'outil de presse.The invention relates more particularly to this type of machine which combines the straightening of the sheet and the supply of this sheet in the press. This machine has a function commonly called "pinching-out" of the sheet, synchronized with the feeding and cutting cycles of the press. During the feeding phase of the press, the sheet is clamped between the lower rectifier rollers and the upper rectifier rollers to undergo the straightening operation. During the cutting or stamping phase of the sheet in the press, it is necessary to release the sheet of its stresses, thus to peel the sheet, to allow its automatic repositioning in the press tool.

Dans les machines actuelles, la fonction de dépinçage est réalisée par l'ouverture du tablier supérieur selon un mouvement de rotation autour d'un axe de pivotement déporté sur un des côtés des tabliers à la manière d'une mâchoire, ou par le soulèvement du tablier supérieur selon un mouvement de translation verticale le long de colonnes de guidage spécifiques. Ces mouvements sont générés par des actionneurs hydrauliques ou électromécaniques, qui nécessitent obligatoirement une alimentation en énergie pour maintenir la position pincée. Ces mécanismes sont encombrants, complexes à mettre en oeuvre et très onéreux aussi bien en besoin d'équipement qu'en besoin d'énergie. De plus, ils génèrent une forte inertie et sont de ce fait limités en cadence. Ils ne sont pas adaptés pour équiper des machines déjà en service. Dans ces machines, les rouleaux redresseurs peuvent être portés par un berceau unique, ce qui interdit le réglage individuel de la pénétration de chacun des rouleaux redresseurs.In current machines, the stripping function is performed by opening the upper apron in a rotational movement about a pivot axis offset on one side of the aprons in the manner of a jaw, or by lifting the upper apron in a vertical translation movement along specific guide columns. These movements are generated by hydraulic or electromechanical actuators, which necessarily require a power supply to maintain the pinched position. These mechanisms are bulky, complex to implement and very expensive both in need of equipment than in need of energy. Moreover, they generate a strong inertia and are therefore limited in rhythm. They are not suitable for equipping machines already in service. In these machines, the straightening rolls can be carried by a single cradle, which prohibits the individual adjustment of the penetration of each of the rectifier rollers.

Les solutions actuelles ne sont donc pas satisfaisantes.Current solutions are therefore not satisfactory.

Exposé de l'invention :Presentation of the invention

La présente invention vise à pallier ces inconvénients en proposant un dispositif « redresseur-amenage » pourvu d'une fonction de « pinçage-dépinçage » réalisée par des moyens compacts, simples, économiques, fiables, générant une très faible inertie, donc pouvant répondre à des cadences élevées, ne nécessitant pas d'énergie pour maintenir la position pincée, pouvant être adaptés sur des machines déjà en service, tout en permettant un réglage précis et individuel de la pénétration de chacun des rouleaux redresseurs.The present invention aims at overcoming these disadvantages by proposing a "rectifier-feeder" device provided with a "pinching-stripping" function performed by compact, simple, economical, reliable means, generating a very low inertia, so that it can respond to high speeds, not requiring energy to maintain the pinched position, which can be adapted to machines already in use, while allowing a precise and individual adjustment of the penetration of each of the rectifier rollers.

Dans ce but, l'invention concerne un dispositif du genre indiqué en préambule, caractérisé en ce que lesdits moyens d'ouverture et de fermeture desdits châssis sont intégrés auxdits moyens de réglage de la position des rouleaux redresseurs supérieurs, sont agencés pour déplacer le châssis supérieur par rapport au châssis inférieur selon un mouvement de translation perpendiculaire auxdits châssis, et comportent les organes de guidage en translation verticale desdits moyens de réglage.For this purpose, the invention relates to a device of the type indicated in the preamble, characterized in that said means for opening and closing said chassis are integrated with said position adjustment means of the upper rectifier rollers, are arranged to move the frame upper relative to the lower frame in a translation movement perpendicular to said frame, and comprise the guide members in vertical translation of said adjusting means.

Grâce à cette construction, on optimise les moyens mécaniques mis en oeuvre pour ajouter la fonction de pinçage-dépinçage à un dispositif de redressage en utilisant la fonction de guidage en translation verticale déjà présente dans les moyens de réglage de la position des rouleaux redresseurs.With this construction, the mechanical means used to add the pinch-out function to a straightening device are optimized by using the vertical translation guide function already present in the position adjustment means of the straightening rollers.

Dans une forme de réalisation préférée de l'invention, les moyens d'ouverture et de fermeture des châssis comportent un module de levage disposé entre le châssis supérieur et les rouleaux redresseurs supérieurs, et couplé à au moins un mécanisme de levage agencé pour déplacer le module de levage, et simultanément le châssis supérieur et les rouleaux redresseurs supérieurs, en translation verticale entre lesdites positions de fermeture et d'ouverture et inversement.In a preferred embodiment of the invention, the means for opening and closing the frames comprise a lifting module arranged between the upper frame and the upper rectifying rollers, and coupled to at least one mechanism lifting device arranged to move the lifting module, and simultaneously the upper frame and the upper rectifier rollers, in vertical translation between said closing and opening positions and vice versa.

Le mécanisme de levage comporte avantageusement au moins une came entraînée en rotation autour d'un axe de rotation fixe par au moins un actionneur, cette came coopérant avec au moins un organe de roulement solidaire dudit module de levage et comportant un profil de came agencé pour que la position de fermeture corresponde à un état stable du dispositif et que la position d'ouverture corresponde à un état temporaire instable de ce dispositif.The lifting mechanism advantageously comprises at least one cam driven in rotation about a fixed axis of rotation by at least one actuator, this cam cooperating with at least one rolling member secured to said lifting module and having a cam profile arranged to that the closed position corresponds to a stable state of the device and that the open position corresponds to a temporary unstable state of this device.

Dans la forme de réalisation préférée de l'invention, la came comporte deux premiers méplats séparés d'un angle d'environ 90° et reliés par un premier secteur sensiblement circulaire, cette came coopérant avec un premier organe de roulement supérieur et solidaire du module de levage, de sorte que le premier secteur sensiblement circulaire définit la position d'ouverture instable du dispositif et que les premiers méplats forment des rampes de roulement sur lesquelles circule l'organe de roulement supérieur entre les positions de fermeture et d'ouverture.In the preferred embodiment of the invention, the cam comprises two first flats separated by an angle of about 90 ° and connected by a first substantially circular sector, this cam cooperating with a first upper rolling member and secured to the module lifting, so that the first substantially circular sector defines the unstable opening position of the device and that the first flats form rolling ramps on which runs the upper rolling member between the closed and open positions.

Cette came comporte avantageusement un second méplat diamétralement opposé au premier secteur sensiblement circulaire et relié aux premiers méplats par des seconds secteurs sensiblement circulaires, cette came coopérant avec un second organe de roulement inférieur, solidaire du module de levage et diamétralement opposé à l'organe de roulement supérieur, de sorte que les seconds secteurs sensiblement circulaires définissent la position de fermeture stable du dispositif.This cam advantageously comprises a second flat diametrically opposed to the first substantially circular sector and connected to the first flats by second substantially circular sectors, this cam cooperating with a second lower rolling member, integral with the lifting module and diametrically opposite the body of upper bearing, so that the second substantially circular sectors define the stable closing position of the device.

L'intervalle séparant les deux organes de roulement supérieur et inférieur solidaires dudit module de levage est avantageusement supérieur à la plus grande dimension transversale de la came et ménage un jeu définissant la course d'ouverture dudit dispositif.The interval separating the two upper and lower running members integral with said lifting module is advantageously greater than the largest transverse dimension of the cam and provides a clearance defining the opening stroke of said device.

Le mécanisme de levage peut comporter au moins un levier de commande articulé d'une part à l'actionneur et d'autre part à l'axe de rotation fixe de la came. Dans ce cas et de manière avantageuse, le mécanisme de levage comporte deux actionneurs montés en opposition sur un châssis fixe, chaque actionneur étant couplé à l'axe de rotation fixe d'une came par un levier de commande, les actionneurs étant reliés mécaniquement pour fonctionner en opposition et additionner leurs efforts. Ces actionneurs peuvent être choisis dans le groupe comprenant un vérin pneumatique bistable, un servomoteur, cette liste n'étant pas exhaustive.The lifting mechanism may comprise at least one control lever articulated on the one hand to the actuator and on the other hand to the fixed axis of rotation of the cam. In this case and advantageously, the lifting mechanism comprises two actuators mounted in opposition on a fixed frame, each actuator being coupled to the fixed axis of rotation of a cam by a control lever, the actuators being mechanically connected to operate in opposition and add up their efforts. These actuators may be chosen from the group comprising a bistable pneumatic cylinder, a servomotor, this list not being exhaustive.

Dans le dispositif de l'invention, les moyens de traction de la bande de matière comportent de préférence des moyens d'ouverture et de fermeture propres et une unité centrale de commande est agencée pour commander simultanément les moyens d'ouverture et de fermeture des châssis et les moyens d'ouverture et de fermeture de ces moyens de traction.In the device of the invention, the traction means of the material web preferably comprise clean opening and closing means and a central control unit is arranged to simultaneously control the means for opening and closing the chassis. and the means for opening and closing these traction means.

Description sommaire des dessins :Brief description of the drawings:

La présente invention et ses avantages apparaîtront mieux dans la description suivante d'un mode de réalisation donné à titre d'exemple non limitatif, en référence aux dessins annexés, dans lesquels:

  • les figures 1 à 3 représentent schématiquement le principe de fonctionnement du dispositif selon l'invention, respectivement en positions pincée, dépincée et pincée,
  • la figure 4 est une vue en perspective d'un dispositif selon l'invention,
  • la figure 5 est une vue similaire à la figure 4 du dispositif sans le châssis,
  • la figure 6 est une vue de face du dispositif de la figure 4,
  • la figure 7 est une vue en coupe longitudinale de la figure 6 prise au niveau des actionneurs, et
  • la figure 8 est une vue de dessus du dispositif de la figure 4.
The present invention and its advantages will appear better in the following description of an embodiment given by way of non-limiting example, with reference to the appended drawings, in which:
  • the Figures 1 to 3 schematically represent the principle of operation of the device according to the invention, respectively in the pinched, plucked and pinched positions,
  • the figure 4 is a perspective view of a device according to the invention,
  • the figure 5 is a view similar to the figure 4 the device without the chassis,
  • the figure 6 is a front view of the device of the figure 4 ,
  • the figure 7 is a longitudinal sectional view of the figure 6 taken at the level of the actuators, and
  • the figure 8 is a top view of the device of the figure 4 .

Illustrations de l'invention et meilleure manière de la réaliser :Illustrations of the invention and best way to achieve it:

Le dispositif 1 de redressage et d'amenée d'une bande de matière 2 semi-rigide dans une machine selon l'invention, notamment d'une tôle métallique dans une presse ou similaire, comporte de manière connue et en référence aux figures, un châssis inférieur 3 portant un jeu de rouleaux redresseurs inférieurs 30, un châssis supérieur 4 portant un jeu de rouleaux redresseurs supérieurs 40 disposés en quinconce par rapport aux rouleaux redresseurs inférieurs 30, des moyens de traction 5 de la bande de matière 2 disposés en amont et en aval desdits jeux de rouleaux redresseurs 30, 40 et des moyens de réglage 6 de la position verticale des rouleaux redresseurs supérieurs 40 par rapport aux rouleaux redresseurs inférieurs 30 comportant des organes de guidage 60 en translation verticale de chaque rouleau redresseur supérieur 40.The device 1 for straightening and feeding a strip of semi-rigid material 2 in a machine according to the invention, in particular a metal sheet in a press or the like, comprises, in a manner known and with reference to the figures, a lower chassis 3 carrying a set of lower rectifier rollers 30, an upper chassis 4 carrying a set of upper rectifier rollers 40 arranged in staggered relation to the lower rectifier rollers 30, traction means 5 of the web of material 2 arranged upstream and downstream of said set of rectifying rollers 30, 40 and adjusting means 6 of the vertical position of the upper rectifier rollers 40 with respect to the lower rectifier rollers 30 having guide members 60 in vertical translation of each upper rectifier roll 40.

Dans l'exemple illustré, le châssis inférieur 3 est fixe et constitue la structure portante de l'ensemble du dispositif 1. Il porte un jeu de quatre rouleaux redresseurs inférieurs 30 parallèles, alignés dans un même plan horizontal, séparés d'un entraxe régulier et entraînés en rotation par un ensemble de pignons moteurs 31 engrenant des pignons récepteurs 32 prévus à l'une des extrémités de chaque rouleau redresseur inférieur 30 (cf. fig. 5 et 7).In the example shown, the lower frame 3 is fixed and constitutes the supporting structure of the entire device 1. It carries a set of four parallel lower straightening rollers, aligned in the same horizontal plane, separated by a regular spacing and driven in rotation by a set of motor pinions 31 meshing with receiving gears 32 provided at one end of each lower rectifier roll 30 (cf. Fig. 5 and 7 ).

Dans l'exemple illustré, le châssis supérieur 4 est mobile et porte un jeu de trois rouleaux redresseurs supérieurs 40, parallèles, séparés d'un entraxe régulier égal à celui des rouleaux redresseurs inférieurs 30 mais intercalés entre eux. La profondeur de la pénétration de chaque rouleau redresseur supérieur 40 entre deux rouleaux. redresseurs inférieurs adjacents 30 est réglable afin d'ajuster le degré de redressage à une bande matière donnée. Pour ce faire, chaque rouleau redresseur supérieur 40 est porté à ses deux extrémités par deux organes de guidage 60 comportant des paliers et coulissant dans deux logements 61 prévus dans le châssis inférieur 3. Les moyens de réglage en position 6 comportent pour chaque rouleau redresseur supérieur 40 deux tiges filetées 62 s'étendant verticalement au travers dudit châssis supérieur 4 et pourvues d'une extrémité inférieure 63 en prise avec chaque organe de guidage 60 et d'une extrémité supérieure 64 à empreinte pour être manoeuvrée par un outil 65 adapté qui peut être manuel ou automatique. Le vissage et le dévissage des tiges filetées 62 génère la descente et la montée du rouleau redresseur supérieur correspondant 40. Pour synchroniser le déplacement des deux extrémités d'un même rouleau redresseur supérieur 40, les tiges filetées 62 sont couplés mécaniquement par une transmission à pignon 66 et chaîne 67.In the example shown, the upper frame 4 is movable and carries a set of three upper rectifier rollers 40, parallel, separated by a regular spacing equal to that of the lower rectifier rollers 30 but interposed between them. The depth of the penetration of each upper rectifier roll 40 between two rollers. Adjacent lower straighteners 30 is adjustable to adjust the degree of straightening to a given material band. To do this, each upper rectifier roll 40 is carried at its two ends by two guide members 60 having bearings and sliding in two housings 61 provided in the lower frame 3. The means of adjustment in position 6 comprise for each upper rectifier roll 40 two threaded rods 62 extending vertically through said upper frame 4 and provided with a lower end 63 in engagement with each guide member 60 and an upper end 64 with an impression to be maneuvered by a suitable tool 65 which can be manual or automatic. The screwing and unscrewing of the threaded rods 62 generates the descent and the rise of the corresponding upper rectifier roll 40. To synchronize the displacement of the two ends of the same upper rectifier roll 40, the threaded rods 62 are mechanically coupled by a pinion gear 66 and chain 67.

Les moyens de traction 5 de la bande de matière 2 disposés en amont et en aval des jeux de rouleaux redresseurs 30, 40 comportent de manière connue chacun un rouleau tracteur inférieur 50 fixe porté par le châssis inférieur 3, un rouleau tracteur supérieur 51 mobile porté par un palier 52 coulissant dans un logement 53 du châssis inférieur 3. Un actionneur 54 tel qu'un moteur est couplé à au moins un des rouleaux tracteurs inférieurs 50, engrenant avec les pignons moteurs 32 pour entraîner en rotation les rouleaux redresseurs inférieurs 30. Ils comportent également des moyens d'ouverture et de fermeture 55 du rouleau tracteur supérieur 51 par rapport au rouleau tracteur 50 agencés pour en position de fermeture pincer la bande de matière pour la faire avancer et en position d'ouverture libérer la bande de matière. Ces moyens d'ouverture et de fermeture 55 comportent des actionneurs disposés au droit de chaque extrémité des rouleaux tracteurs supérieurs 51 et commandés par une unité centrale de commande (non représentée). Ces actionneurs sont, dans l'exemple représenté, constitués par des vérins 55 de préférence pneumatiques dont la tige 56 est en prise avec le palier 52 coulissant, mais peuvent être remplacés par des servomoteurs ou tout autre actionneur connu pneumatique, hydraulique ou électrique.The traction means 5 of the strip of material 2 arranged upstream and downstream of the sets of rectifying rollers 30, 40 comprise in known manner each a fixed lower tractor roll 50 carried by the lower chassis 3, an upper mobile tractor roller 51 by a bearing 52 sliding in a housing 53 of the lower chassis 3. An actuator 54 such as a motor is coupled to at least one of the lower tractor rollers 50, meshing with the driving pinions 32 to rotate the lower rectifier rollers 30. They also include means for opening and closing 55 of the upper tractor roller 51 relative to the tractor roller 50 arranged for the closed position to clamp the strip of material to advance it and in the open position to release the strip of material. These opening and closing means 55 comprise actuators arranged at the right of each end of the upper tractive rollers 51 and controlled by a central control unit (not shown). These actuators are, in the example shown, constituted by cylinders 55 preferably pneumatic whose rod 56 is engaged with the sliding bearing 52, but can be replaced by servomotors or any other known actuator pneumatic, hydraulic or electrical.

Le dispositif 1 de redressage et d'amenée d'une bande de matière 2 dans une machine selon l'invention comporte des moyens d'ouverture et de fermeture 7 des châssis supérieur 4 et inférieur 3 agencés pour, en position de fermeture, pincer la bande de matière 2 entre les rouleaux redresseurs inférieurs 30 et supérieurs 40, et en position d'ouverture, libérer la bande matière 2 des contraintes des rouleaux redresseurs 30, 40. Ces moyens d'ouverture et de fermeture 7 des châssis 3, 4 sont commandés par l'unité centrale de commande (non représentée) simultanément aux moyens de traction 5 pour pouvoir libérer la bande de matière 2 de toute contrainte.The device 1 for straightening and feeding a strip of material 2 in a machine according to the invention comprises means for opening and closing 7 of the upper frame 4 and lower 3 arranged for, in the closed position, to pinch the Band material 2 between the upper and lower rectifier rollers 40, and in the open position, release the material web 2 from the stresses of the straightening rollers 30, 40. These opening and closing means 7 of the frames 3, 4 are controlled by the central control unit (not shown) simultaneously with the traction means 5 to be able to release the material strip 2 from any constraint.

Les moyens d'ouverture et de fermeture 7 se différencient de l'art antérieur en ce qu'ils sont intégrés aux moyens de réglage 6 de la position des rouleaux redresseurs supérieurs 40 et sont agencés pour déplacer le châssis supérieur 4 mobile et les rouleaux redresseurs supérieurs 40 par rapport au châssis inférieur 3 fixe et aux rouleaux redresseurs inférieurs 30 selon un mouvement de translation perpendiculaire auxdits châssis 3 et 4. Ils utilisent pour ce faire les organes de guidage 60 en translation verticale des moyens de réglage 6. Dans ce but, ils comportent un module de levage 70 disposé entre le châssis supérieur 4 et les rouleaux redresseurs supérieurs 40, et couplé à un mécanisme de levage 71, 72 agencé pour déplacer le module de levage 70, entraînant simultanément le châssis supérieur 4 et le jeu des rouleaux redresseurs supérieurs 40, en translation verticale entre la position de fermeture correspondant à la fonction pinçage de la bande de matière 2 et la position d'ouverture correspondant à la fonction dépinçage de la bande de matière 2.The opening and closing means 7 are different from the prior art in that they are integrated with the adjustment means 6 of the position of the upper rectifier rollers 40 and are arranged to move the mobile upper frame 4 and the rectifier rollers. 40 in relation to the lower fixed chassis 3 and lower rectifier rollers 30 in a translation movement perpendicular to said frame 3 and 4. They use the guide members 60 in vertical translation of the adjustment means 6. For this purpose, they comprise a lifting module 70 arranged between the upper frame 4 and the upper rectifying rollers 40, and coupled to a lifting mechanism 71, 72 arranged to move the lifting module 70, simultaneously driving the upper frame 4 and the set of rollers upper straighteners 40, in vertical translation between the closed position corresponding to the clamping function of the stripe of m 2 and the open position corresponding to the stripping function of the material web 2.

En référence également aux figures 1 à 3 qui illustrent schématiquement le principe de fonctionnement de ces moyens d'ouverture et de fermeture 7, le mécanisme de levage comporte au moins une came 71 et de préférence deux cames 71 parallèles, distantes l'une de l'autre et disposées dans les zones d'extrémité du module de levage 70 pour répartir les efforts. Chaque came 71 est entraînée en rotation autour d'un axe de rotation fixe A par au moins un actionneur 72, l'axe de rotation fixe A et l'actionneur 72 étant portés par un châssis fixe 73 prolongeant le châssis inférieur 3. L'actionneur 72 est dans l'exemple représenté constitué par un vérin pneumatique bistable. Tout autre actionneur 72 peut convenir comme par exemple un servomoteur. Dans l'exemple représenté, le mécanisme de levage comporte deux vérins 72 montés en opposition sur le châssis fixe 73 et reliés mécaniquement pour fonctionner en opposition et additionner leurs efforts. Plus particulièrement, chaque vérin 72 est monté sur le châssis fixe 73 par un axe d'articulation F et les tiges 76 des deux vérins 72 sont reliées entre elles par un assemblage d'étriers 77 articulés. Chaque came 71 est entraînée en rotation par un levier de commande 78 couplé d'une part à l'actionneur 72 correspondant par une articulation G prévue sur un des étriers 77 et d'autre part à l'axe de rotation fixe A de la came 71.With reference also to Figures 1 to 3 which schematically illustrate the operating principle of these opening and closing means 7, the lifting mechanism comprises at least one cam 71 and preferably two cams 71 parallel, spaced apart from each other and arranged in the zones d end of the lifting module 70 to distribute the forces. Each cam 71 is rotated about a fixed axis of rotation A by at least one actuator 72, the fixed axis of rotation A and the actuator 72 being carried by a fixed frame 73 extending the lower frame 3. The Actuator 72 is in the example shown constituted by a bistable pneumatic cylinder. Any other actuator 72 may be suitable, for example a servomotor. In the example shown, the lifting mechanism comprises two cylinders 72 mounted in opposition to the fixed frame 73 and mechanically connected to operate in opposition and add up their efforts. More particularly, each jack 72 is mounted on the fixed frame 73 by a hinge pin F and the rods 76 of the two cylinders 72 are interconnected by an assembly of articulated stirrups 77. Each cam 71 is rotated by a control lever 78 coupled on the one hand to the corresponding actuator 72 by a hinge G provided on one of the stirrups 77 and on the other hand to the fixed axis of rotation A of the cam 71.

Chaque came 71 est disposée entre un organe de roulement supérieur 74 et un organe de roulement inférieur 75, constitué respectivement d'un galet supérieur et d'un galet inférieur, diamétralement opposés et mobiles en rotation autour d'axes de rotation solidaires du module de levage 70 et parallèles à l'axe de rotation fixe A de la came 71. L'intervalle E séparant les organes de roulement 74, 75 est supérieur à la plus grande dimension transversale D de la came 71 et ménage un jeu qui est par exemple de quelques millimètres et qui définit à la course d'ouverture C du dispositif 1 (cf. fig. 2).Each cam 71 is disposed between an upper rolling member 74 and a lower rolling member 75, consisting respectively of an upper roller and a lower roller, diametrically opposed and rotatable about integral axes of rotation of the module. 70 and parallel to the fixed axis of rotation of the cam 71. The interval E between the rolling members 74, 75 is greater than the largest transverse dimension D of the cam 71 and provides a clearance which is for example a few millimeters and which defines the opening stroke C of the device 1 (cf. Fig. 2 ).

Chaque came 71 comporte un profil de came agencé pour que la position de fermeture corresponde à un état stable du dispositif 1 et que la position d'ouverture corresponde à un état temporaire instable dudit dispositif. Plus particulièrement, chaque came 71 comporte deux premiers méplats 711 séparés d'un angle d'environ 90° et reliés par un premier secteur 712 sensiblement circulaire, qui coopèrent avec l'organe de roulement supérieur 74 solidaire du module de levage 70, de sorte que le premier secteur sensiblement circulaire 712 définit la position d'ouverture du dispositif 1 (cf. fig. 2) et que les premiers méplats 711 forment des rampes de roulement sur lesquelles circule cet organe de roulement supérieur 74 entre les positions de fermeture et d'ouverture. En position de fermeture (cf. fig. 1 et 3), les premiers méplats 711 délimitent avec l'organe de roulement supérieur 74 un jeu correspondant à la course d'ouverture C du dispositif 1.Each cam 71 has a cam profile arranged so that the closed position corresponds to a stable state of the device 1 and the open position corresponds to an unstable temporary state of said device. More particularly, each cam 71 has two first flats 711 separated by an angle of about 90 ° and connected by a first substantially circular sector 712, which cooperate with the upper rolling member 74 secured to the lifting module 70, so that that the first substantially circular sector 712 defines the open position of the device 1 (cf. Fig. 2 ) and that the first flats 711 form rolling ramps on which this upper rolling member 74 circulates between the closed and open positions. In the closed position (cf. Fig. 1 and 3 ), the first flats 711 delimit with the upper rolling member 74 a clearance corresponding to the opening stroke C of the device 1.

Chaque came 71 comporte également un second méplat 713 diamétralement opposé au premier secteur sensiblement circulaire 712 et relié aux premiers méplats 711 par des seconds secteurs sensiblement circulaires 714 qui coopèrent avec l'organe de roulement inférieur 75 solidaire du module de levage 70 pour définir la position de fermeture stable du dispositif 1. En position d'ouverture (cf. fig. 2), le second méplat 713 délimite avec l'organe de roulement inférieur 75 un jeu correspondant à la course d'ouverture C du dispositif 1. Le module de levage 70 est guidé en translation verticale à la fois par les organes de guidage 60 des rouleaux redresseurs supérieurs 40 et par les parties latérales du châssis fixe 73 qui ne sont pas représentées sur les figures.Each cam 71 also has a second flat 713 diametrically opposed to the first substantially circular sector 712 and connected to the first flats 711 by second substantially circular sectors 714 which cooperate with the lower rolling member 75 integral with the lifting module 70 to define the position stable closure of the device 1. In the open position (cf. Fig. 2 ), the second flat 713 defines with the lower rolling member 75 a clearance corresponding to the opening stroke C of the device 1. The lifting module 70 is guided in vertical translation both by the guide members 60 of the rollers upper straighteners 40 and the side portions of the fixed frame 73 which are not shown in the figures.

Le fonctionnement des moyens d'ouverture et de fermeture 7 du dispositif 1 est à présent décrit en référence aux figures 1 à 3, qui représentent un dispositif de redressage et d'amenée 1 d'une bande de matière 2 épuré et sans les moyens de traction 5.The operation of the opening and closing means 7 of the device 1 is now described with reference to the Figures 1 to 3 , which represent a device for straightening and feeding 1 a strip of purified material 2 and without the traction means 5.

Dans la figure 1, le dispositif 1 est en position de fermeture stable, la bande de matière 2 est pincée entre les rouleaux redresseurs inférieurs 30 et les rouleaux redresseurs supérieurs 40 et subit une étape de redressage pendant son avancée. Le vérin 72 de droite est en position rentrée stable et le vérin 72 de gauche en position sortie stable, les leviers de commande 78 sont orientés vers la droite et les cames 71 sont en appui tangent par leur second secteur 714 sur les organes de roulement inférieurs 75 maintenant le module de levage 70 en position basse et simultanément le châssis supérieur 4 et les rouleaux redresseurs supérieurs 40 en position de fermeture stable et sans énergie. Dans cette position, le jeu correspondant à la course d'ouverture C est situé entre le premier méplat 711 correspondant des cames 71 et les organes de roulement supérieurs 74.In the figure 1 , the device 1 is in the stable closed position, the material strip 2 is clamped between the lower rectifier rollers 30 and the upper rectifier rollers 40 and undergoes a straightening step during its advance. The jack 72 on the right is in the stable retracted position and the jack 72 on the left in the stable output position, the control levers 78 are oriented to the right and the cams 71 are tangentially supported by their second sector 714 on the lower running gear. 75 now the lifting module 70 in the low position and simultaneously the upper frame 4 and the upper rectifier rollers 40 in the stable position and without energy. In this position, the clearance corresponding to the opening stroke C is situated between the first flat surface 711 corresponding to the cams 71 and the upper rolling members 74.

La figure 2 représente le dispositif 1 en position d'ouverture instable et temporaire, dans laquelle la bande de matière 2 n'avance plus et est libérée des contraintes des rouleaux redresseurs 30 et 40 et peut s'auto-centrer par rapport aux outils de presse. Les vérins 72 sont en travail et sous pression, le vérin de droite est en position partiellement sortie et le vérin de gauche en position partiellement rentrée, les leviers de commande 78 ont tourné d'environ ¼ de tour dans le sens de la flèche R1 entraînant avec elles les cames 71. Au cours de cette rotation, le second secteur 714 des cames 71 quitte les organes de roulement inférieurs 75, et le premier méplat 711 des cames 71 rencontre les organes de roulement supérieurs 74 provoquant le soulèvement vertical du module de levage 70 en position haute et simultanément du châssis supérieur 4 et des rouleaux redresseurs supérieurs 40, jusqu'à atteindre le premier secteur 712 des cames 71 correspondant à la course d'ouverture C maximale et définissant la position d'ouverture instable, temporaire et sous énergie. Dans cette position, le jeu correspondant à la course d'ouverture C est reporté entre le second méplat 713 correspondant des cames 71 et les organes de roulement inférieurs 75.The figure 2 represents the device 1 in unstable and temporary opening position, in which the strip of material 2 no longer advances and is released from the constraints of the rectifier rollers 30 and 40 and can self-center relative to the press tools. The cylinders 72 are in operation and under pressure, the right cylinder is in the partially extended position and the left cylinder in the partially retracted position, the control levers 78 have rotated about ¼ of a turn in the direction of the leading arrow R1. with them the cams 71. During this rotation, the second sector 714 of the cams 71 leaves the lower rolling members 75, and the first flat 711 of the cams 71 meets the upper rolling members 74 causing the vertical lifting of the lifting module 70 in the up position and simultaneously of the upper frame 4 and the upper rectifier rollers 40, until reaching the first sector 712 of the cams 71 corresponding to the maximum opening stroke C and defining the unstable, temporary and energy-free opening position . In this position, the clearance corresponding to the opening stroke C is transferred between the corresponding second flat 713 of the cams 71 and the lower rolling members 75.

La figure 3 illustre le dispositif 1 revenu en position de fermeture stable, la bande de matière 2 est à nouveau pincée entre les rouleaux redresseurs inférieurs 30 et les rouleaux redresseurs supérieurs 40 pour continuer l'étape de redressage pendant son avancée. Les vérins 72 ont continué leur travail dans le même sens, le vérin de droite étant en position sortie stable et le vérin de gauche en position rentrée stable, les leviers de commande 78 ont continué leur rotation d'environ ¼ de tour dans le sens de la flèche R2 entraînant avec elles les cames 71. Au cours de cette rotation, le premier secteur 712 des cames 71 quitte les organes de roulement supérieurs 74 qui roulent sur l'autre premier méplat 711 des cames 71 provoquant l'abaissement vertical du module de levage 70 en position basse et simultanément du châssis supérieur 4 et des rouleaux redresseurs supérieurs 40 jusqu'à ce que le second secteur 714 des cames 71 rencontre à nouveau les organes de roulement inférieurs 75 correspondant à la position de fermeture stable et sans énergie.The figure 3 illustrates the device 1 income in stable closed position, the material strip 2 is again pinched between the lower rectifier rollers 30 and the upper rectifier rollers 40 to continue the straightening step during its advance. The cylinders 72 continued their work in the same direction, the right cylinder being in the stable output position and the left cylinder in the stable retracted position, the control levers 78 continued their rotation about ¼ turn in the direction of the arrow R2 driving with them the cams 71. During this rotation, the first sector 712 of the cams 71 leaves the upper rolling members 74 which roll on the other first flat 711 of the cams 71 causing the vertical lowering of the module lifting 70 in the low position and simultaneously the upper frame 4 and the upper rectifier rollers 40 until the second sector 714 of the cams 71 meets the lower rolling members 75 corresponding to the stable closed position and without energy.

Pour effectuer un nouveau cycle de pinçage/dépinçage/pinçage, les vérins 72 sont alimentés en sens inverse. Le déplacement angulaire des cames 71 est limité à un angle d'environ 90° qui est suffisant pour générer ces cycles. De fait, on comprend aisément que ce mécanisme a un temps de réponse très rapide lui permettant d'atteindre des cadences de cycles élevées.To perform a new cycle of pinching / stripping / clamping, the cylinders 72 are fed in the opposite direction. The angular displacement of the cams 71 is limited to one angle of about 90 ° which is sufficient to generate these cycles. In fact, it is easy to understand that this mechanism has a very fast response time enabling it to reach high cycle rates.

Possibilités d'application industrielle :Possibilities of industrial application:

Les pièces, sous-ensembles et ensembles composant le dispositif 1 selon l'invention sont réalisées par des processus industriels reproductibles. Ce dispositif 1 n'est pas limité au redressage d'une tôle et à l'amenée de cette tôle redressée dans une presse, mais s'étend à toute autre application nécessitant ces fonctions de redressage et d'amenée dans tout type de machine.The parts, subassemblies and assemblies composing the device 1 according to the invention are produced by reproducible industrial processes. This device 1 is not limited to the straightening of a sheet and the supply of this rectified sheet in a press, but extends to any other application requiring these straightening and feeding functions in any type of machine.

Il ressort clairement de cette description que l'invention permet d'atteindre les buts fixés. Elle permet notamment de réaliser la fonction de « pinçage/dépinçage » greffée sur une machine de redressage à l'aide d'un mécanisme optimisé grâce auquel la fonction pinçage est stable et sans apport d'énergie.It is clear from this description that the invention achieves the goals. In particular, it makes it possible to perform the "pinching / peeling" function grafted onto a straightening machine by means of an optimized mechanism by means of which the clamping function is stable and without energy input.

La présente invention n'est pas limitée à l'exemple de réalisation décrit mais s'étend à toute modification et variante évidentes pour un homme du métier tout en restant dans l'étendue de la protection définie dans les revendications annexées.The present invention is not limited to the embodiment described but extends to any modification and variation obvious to a person skilled in the art while remaining within the scope of protection defined in the appended claims.

Claims (10)

  1. Device (1) for straightening a strip (2) of semi-rigid material and feeding it into a machine, in particular a metallic sheet into a press or suchlike, the device comprising at least one lower frame (3) which carries a set of lower straightening rolls (30), an upper frame (4) which carries a set of upper straightening rolls (40) arranged staggered relative to the lower straightening rolls (30), traction means (5) of the strip of material arranged upstream and downstream from the said sets of straightening rolls (30, 40), means (6) for adjusting the vertical position of the upper straightening rolls (40) relative to the lower straightening rolls (30), the said means comprising guiding elements (60) for the vertical translation of each upper straightening rolls (40), and means (7) for opening and closing the said upper (4) and lower (3) frames, designed such that in the closed position the strip (2) of material is gripped between the lower straightening rolls (30) and the upper straightening rolls (40) and, in the open position, the strip (2) of material is released from the constraint of the said straightening rolls (30, 40), characterized in that the said means (7) for opening and closing the said frames (3, 4) are integrated with the said means (6) for adjusting the position of the upper straightening rolls (40), are designed to move the upper frame (4) relative to the lower frame (3) in a translation movement perpendicular to the said frames (3, 4), and comprise guiding elements (60) of the said adjustment means (6) in vertical translation.
  2. Device according to Claim 1, characterized in that the said means (7) for opening and closing the said frames comprise a lifting module (70) arranged between the upper frame (4) and the upper straightening rolls (40), and coupled to at least one lifting mechanism (71, 72) designed to move the said lifting module (70) and at the same time the said upper frame (4) and the said upper straightening rolls (40) in vertical translation between the said closing and opening positions and vice-versa.
  3. Device according to Claim 2, characterized in that the said lifting mechanism comprises at least one cam (71) driven in rotation about a fixed rotation axle (A) by at least one actuator (72), the said cam (71) co-operating with at least one roller element (74, 75) fixed on the said lifting module (70) and having a cam profile designed so that the closed position corresponds to a stable condition of the said device (1) and the open position corresponds to a temporary, unstable condition of the said device (1).
  4. Device according to Claim 3, characterized in that the said cam (71) has two first flat sections (711) separated by an angle of about 90° and connected by a first essentially circular sector (712), the said cam (71) co-operating with a first, upper roller element (74) fixed on the said lifting module (70), in such manner that the said first essentially circular sector (712) defines the said unstable open position of the device (1) and the said first flat sections (711) form rolling ramps on which the said upper roller element (74) circulates between the closing and opening positions.
  5. Device according to Claim 4, characterized in that the said cam (71) has a second flat section (712) diametrically opposite the said first essentially circular sector (712) and connected to the said first flat sections (711) by second essentially circular sectors (714), the said cam (71) co-operating with a second, lower roller element (75) which is fixed on the said lifting module (70) and diametrically opposite the upper roller element (74), in such manner that the said essentially circular second sectors (714) define the said stable, closed position of the device (1) and the second flat section (713) forms a clearance zone which defines the opening travel C of the device (1).
  6. Device according to Claim 5, characterized in that the gap (E) separating the two, upper (74) and lower (75) roller elements fixed on the said lifting module (70) is wider than the largest transverse dimension (D) of the said cam (71), and allows a clearance which defines the opening travel (C) of the said device (1).
  7. Device according to Claim 3, characterized in that the said lifting mechanism comprises at least one central control lever (78) articulated at one end to the said actuator (72) and at the other end to the fixed rotation axle (A) of the said cam (71).
  8. Device according to Claim 7, characterized in that the said lifting mechanism has two actuators (72) mounted in opposition on a fixed frame (73), each actuator (72) being coupled to the fixed rotation axle (A) of one cam (71) by a control lever (78), the said actuators (72) being mechanically connected so as to operate in opposition and add their forces.
  9. Device according to Claims 3 to 8, characterized in that the said actuator (72) is chosen from the group comprising a bistable pneumatic jack and a servomotor.
  10. Device according to Claim 1, characterized in that the said traction means (5) of the strip (2) of material comprise opening and closing means of their own, and in that the said device comprises a central control unit designed to control simultaneously the opening and closing means (7) of the said frames (3, 4) and the opening and closing means of the said material strip traction means (5).
EP09360045A 2008-10-17 2009-10-15 Device for straightening and feeding a semi-rigid band of material into a machine Active EP2177292B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0805757A FR2937267B1 (en) 2008-10-17 2008-10-17 DEVICE FOR RECOVERING AND MAINTAINING A BAND OF SEMI-RIGID MATERIAL IN A MACHINE

Publications (2)

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EP2177292A1 EP2177292A1 (en) 2010-04-21
EP2177292B1 true EP2177292B1 (en) 2011-05-04

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US (1) US20100095727A1 (en)
EP (1) EP2177292B1 (en)
AT (1) ATE507909T1 (en)
DE (1) DE602009001229D1 (en)
FR (1) FR2937267B1 (en)

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CN103170594B (en) * 2013-04-18 2015-03-25 中冶赛迪工程技术股份有限公司 Locating and regulating system of withdrawal and straightening machine
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Also Published As

Publication number Publication date
EP2177292A1 (en) 2010-04-21
FR2937267B1 (en) 2010-11-12
DE602009001229D1 (en) 2011-06-16
ATE507909T1 (en) 2011-05-15
FR2937267A1 (en) 2010-04-23
US20100095727A1 (en) 2010-04-22

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