EP1804981A1 - Sheet metal bending machine and production line incorporating a machine of this type - Google Patents

Sheet metal bending machine and production line incorporating a machine of this type

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Publication number
EP1804981A1
EP1804981A1 EP05812400A EP05812400A EP1804981A1 EP 1804981 A1 EP1804981 A1 EP 1804981A1 EP 05812400 A EP05812400 A EP 05812400A EP 05812400 A EP05812400 A EP 05812400A EP 1804981 A1 EP1804981 A1 EP 1804981A1
Authority
EP
European Patent Office
Prior art keywords
bending
roller
machine
rollers
roll
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
Application number
EP05812400A
Other languages
German (de)
French (fr)
Other versions
EP1804981B1 (en
Inventor
Michel Gravier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Conception Machines Faveyrial
Original Assignee
Jammes Industrie
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jammes Industrie filed Critical Jammes Industrie
Publication of EP1804981A1 publication Critical patent/EP1804981A1/en
Application granted granted Critical
Publication of EP1804981B1 publication Critical patent/EP1804981B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers

Definitions

  • the invention relates to a machine for bending sheets and, more particularly, to a rolling machine.
  • the invention also relates to a machine for manufacturing tubes or cylinder by bending sheet metal, this installation incorporating a bending machine.
  • the term "rolling machine” designates all the machines making it possible to produce a tube or a shell from a metal plate of small thickness, in particular of a sheet.
  • the production of tubes or ferrules from sheets is carried out by bending, that is to say by curving the sheet according to a radius of curvature corresponding to that of the tube or ferrule.
  • the invention relates to rollers for producing tubes or ferrules with the smallest possible diameter depending on the length of the tube and the thickness of its wall, for example 60 mm diameter tubes for a length of about 1 meter and a thickness of 0.5 mm.
  • FR-B-2,750,061 discloses rollers comprising a bending roller, driven in rotation and around which the sheet is wound, as well as two support rollers, parallel to the bending roll, which make it possible to an adjustable passage between the different rollers, so as to guide and give the desired radius of curvature to the sheet.
  • the outer diameter of the bending roller governs the minimum diameter of the tube or shell that can be obtained in one revolution with the rolling machine.
  • the internal diameter of the tube or ferrule thus formed varies in particular as a function of the elastic limit of the metal or of the metal alloy of the sheet: the higher this limit, the greater the final diameter of the tube, the sheet metal tending to return to its original form.
  • the minimum diameter of the tube is about 1.2 times the diameter of the bending roll.
  • the minimum diameter of the tube is about 5 times the diameter of the bending roll.
  • the diameter of the bending roller must be 1, 4 times smaller, that is to say close to 55 mm . Given the constraints it undergoes during a rolling operation, a bending roller of this diameter, a length close to one meter, does not remain rectilinear, but tends to have a large arrow. Likewise, the support rollers tend to have an arrow. This deflection problem can also be accompanied, depending on the stresses exerted by the sheet, a start twisting of the bending roller.
  • FR-B-2 750 061 describes a solution for resolving the deflection of the support rollers by the use of a plurality of aligned short-length support rollers, or, alternatively, support rollers of length close to that of the bending roll that rest on several small rollers.
  • EP-A-0 477 751 discloses an upper roll and a lower roll, the latter being flanked by two parallel rollers. Adjustable rollers carried by beams and movable in sliders, come to adjustable support on the rollers located in the lower part to compensate their arrow.
  • the invention more particularly intends to remedy by proposing a rolling machine adapted to the production of tubes of high length / diameter ratio and cylindrical.
  • the subject of the invention is a sheet-type bending machine, of rolling type, comprising on the one hand a bending roll, driven in rotation and around which the sheet is wound, and on the other hand at least two support rollers adapted to receive in support a sheet being bent around the bending roller, the support rollers being rotatably mounted on a height-adjustable support, so as to adapt the clearance between the bending roller and the support rollers to the thickness of the sheet, the bending roller being associated with at least one set of at least partial compensation means of its arrow, the support rollers being associated with at least one game of means for compensating for their deflection, the clearance being adjustable according to the residual deflection of the bending roller, characterized in that the set of means for compensating the deflection of the bending roller comprises an arm provided with a housing in which is partially received the roller, and means for holding the roller in the housing.
  • Such a roller makes it possible to compensate, in a coordinated manner, the arrows of the different rollers and thus to form cylindrical tubes.
  • the machine may incorporate one or more of the following features:
  • the housing is a groove along the length of which are distributed at least three sets of holding means of the bending roller with a minimum deflection when it is rotating.
  • each of the sets of means for holding the bending roller comprises two rollers resting on the roll in a direction generally perpendicular to a main axis of the housing.
  • the machine comprises at least three sets of means for compensating the deflection of the support rollers.
  • each of the sets of means for compensating the deflection of the support rollers comprises at least three ball bearings juxtaposed and fixed on a support adjustable in height, for example by means of a sloped wedge.
  • Each of these sets of compensation means is height-adjustable individually by means of a micrometer screw.
  • All sets of means of compensation of the arrow of the support rollers are slidably mounted on a single base, itself adjustable in height by means of at least two sloping wedges.
  • the sets of bending roller holding means are arranged substantially staggered relative to the sets of arrow compensation means of the support rollers.
  • the bending roller is supported by an arm with which it is removably mounted on the machine.
  • the invention also relates to a line for manufacturing tubes or cylinders by bending sheet metal comprising at least one sheet bending machine made according to one of the preceding characteristics.
  • FIG. 1 is a perspective view, simplified, of a machine according to an embodiment of the invention, a sheet being shown before bending, in phantom,
  • FIG. 2 is a partial section along the plane II of the upper part of the machine represented in FIG. 1, for the sake of clarity only three sets of means for holding the bending roller and three sets of compensation means of one roll of support are represented,
  • FIG. 3 is a bottom, partial and perspective view of the bending roller and of certain means for compensating its arrow
  • FIG. 4 is a partial section on a larger scale along line IV-IV in FIG. 1;
  • FIG. 5 is a partial longitudinal section, on a different scale, along line V-V in FIG. 4 of a system for holding the bending roller in an element for compensating for the jib,
  • FIG. 6 is a perspective view of a set of means for compensating the deflection of the support rollers, the groove in which this piece rests being shown in phantom and
  • FIG. 7 Figures 7 to 9 are diagrams illustrating the different phases of the bending of a sheet.
  • said rolling machine represented in FIG. 1, comprises a main body 2 generally configured in H.
  • the spacing between the uprights 3, 4 of the H is adapted to the final length of the T tube that we want to achieve.
  • the crossbar 5 of the body 2 of the machine supports a cross-member 6 fixed held generally horizontal.
  • This crosspiece 6 is provided on its upper face with three notches 7, inclined at approximately 45 ° relative to a longitudinal axis AA 'of the crossbar 5.
  • the cross member 6 is movable longitudinally, by a hydraulic device 60, in a direction parallel to the axis A-A '.
  • the shims 8 when moving from right to left simultaneously or from left to right in FIG. the shims 8 by sliding on the slope of the notches 7 on which they rest, raise or lower the cross member 9, in a direction generally perpendicular to the axis AA 'and parallel to the plane of Figure 2.
  • this device transforms a horizontal movement in vertical movement.
  • the cross member 9 is equipped on its upper face with a longitudinal groove. For the sake of clarity, this groove is shown in phantom in FIG. 6. Devices 11 for compensating the deflection of the support rollers are partially engaged in this groove 10 and are movable therein.
  • Each of the members 11 or games comprises a main body 12 generally configured U flat bottom.
  • the inner face 13 of the bottom is inclined.
  • a sloped shim, or "wedge" 14 whose inclined face has a slope substantially identical to that of the face 13, is positioned on the bottom of the main body 12.
  • a frame 15 is placed on the upper face of the shim 14.
  • chassis supports three juxtaposed ball bearings 16 whose axes of rotation Xi 6 are parallel and oriented in a direction generally perpendicular to the plane of Figure 4. The ball bearings 16 thus form a raceway generally parallel to the slope of the bottom 13.
  • a setting device 17 comprising a micrometer screw 17A and equipped with a counter 17B is mounted on a wing of the body 12.
  • the device 17 is not shown in Figure 4 for clarity of the drawing.
  • the end of the screw 17A is connected to an edge of the sloping wedge 14.
  • This displacement Fi of the wedge 14 is on the inclined face of the bottom 13, which has the effect of raising or lowering the frame 15 which is placed on the upper face of the wedge 14.
  • This vertical movement is represented by the double arrow F 2 in FIG.
  • a relief 18 is projecting on the outer face of the bottom 13A. It is of a form adapted to fit, to play reduced, and to slide in the groove 10 of the cross member 9. The spacing of the members 11 is adjusted so that, when in position in the groove 10, the ball bearings 16 are evenly spaced, parallel to the axis A-A '.
  • Two cylindrical rods 19 of circular section, solid or hollow, preferably made of a metal or an alloy of stainless metals are disposed on the raceway formed by the ball bearings 16. These two rods constitute the support rollers 19 of the machine. They are mounted free in rotation while being held by their ends in housings formed in vertical uprights secured to the cross member 9.
  • the support rollers 19 are arranged so that, at each member 11, each roller 19 is supported by two ball bearings 16 juxtaposed.
  • the longitudinal axes X 19 of the rollers 19 and the longitudinal axes Xi 6 of the ball bearings 16 are generally parallel to the axis AA 'of the crossmember 6.
  • the rollers 19 and the ball bearings 16 are driven together. compared to others in rotation by friction.
  • the upper part of the main body 2 of the machine receives the bending roller 20 around which winds the sheet when bent.
  • the axis X 2 o of the roll 20 is disposed in a direction generally parallel to the axis A-A '.
  • the roller 20 is kept as straight as possible by means of compensation of its arrow.
  • These means of compensation of the arrow comprise an arm 21 of cylindrical outer shape, solid, circular section, made of a rigid material.
  • This arm 21 has a high elastic inertia that is to say that it remains generally rectilinear or, at least, it has a low deflection when it is subjected to stress, in particular a bending force.
  • its outer diameter is generally between three and six times that of the bending roller 20.
  • This arm 21 is provided, over substantially its entire length, with a longitudinal groove 22.
  • the groove 22 is flat-bottomed.
  • the width. of this groove 22 is substantially greater than the diameter of the bending roller 20.
  • This groove 22 is adapted to receive organs providing a bearing contact between the roller 20 and the arm 21.
  • Several support subassemblies 23 of the roll 20 are distributed over the length of the groove 22.
  • Three subassemblies 23, which is a minimum, are shown in FIG. 2, but their number is variable and chosen during the design of Ia. rolling machine 1.
  • rollers 23A are mounted on a cradle 23B.
  • This cradle 23B has a generally U-shaped flat bottom.
  • the dimensions and the external shape of the cradle 23B are adapted to those of the groove 22.
  • the shapes and internal dimensions of the cradle 23B are adapted to marry, without contact, the circumference of the roll 20.
  • FIG. 5 is a section in two different planes of the cradle 23B passing on the one hand in the median plane of the cradle 23B (left part of the figure) and, on the other hand, in the median plane of a support axis 26 of a roller 23A (right part of the figure).
  • the rollers 23A are mounted, in pairs, on each cradle 23B.
  • a screw 25 passes through the bottom of the cradle 23B and fixes the latter at the bottom of the groove 22.
  • the rollers 23A are each free to rotate about an axis 26 maintained in two bearings 23C formed in the cradle 23B.
  • the axes 26 are oriented in a direction parallel to a longitudinal axis X 22 of the groove 22.
  • the groove 22 formed in the arm 21 is thus equipped with at least three subassemblies 23 each carrying two rollers 23A.
  • the inner dimensions of each cradle 23B are adapted to partially cap with a minimum clearance, the roller 20.
  • the rollers 23A are mounted on each cradle 23B so as to come into permanent contact with the roller 20, while allowing the free rotation of the roller 20 and rollers 23A resting on the roll 20.
  • each cradle 23B located in the groove 22 This is maintained in each cradle 23B located in the groove 22 by the ends 200, 201 of the roller 20.
  • An end 200 is connected to a rotary drive member, for example an electric motor M or hydraulic.
  • the other end 201 is provided with a housing 202 in which engages a relief or rod 203 attached to one end of the arm 21.
  • the dimensions of the housing 202 and the rod 203 are adapted to ensure the free rotation of the roll 20, which makes it possible, when the roll 20 is in rotation and put under stress, to preserve as much as possible its straightness.
  • the assembly formed by the roller 20 and the arm 21, is disposed in the upper part of the machine 1, between the free ends of the uprights 3 and 4 of the main body 2.
  • the roller 20 is connected to the motor M driving in rotation through an orifice in the heel 21A of the arm 21.
  • the arm 21 is fixed to the main body, for example by bolting one of its ends.
  • the other end of the sleeve 21 is provided with a frustoconical mandrel 27.
  • This mandrel is housed, when the roller 20 is rotating, in a movable arm 28.
  • a pivoting movement of the arm 28 about an axis 28A fixed on the body 2 makes it possible to disengage the mandrel 27 and to release the end of the arm 21. This movement is represented by the arrow F 3 in FIG.
  • the assembly formed of the roller 20 and the arm 21 is fixedly positioned above the two support rollers 19. These are adjusted in height, so that the space between the rollers 20 and 19 corresponds globally to the thickness of the sheet to be bent.
  • One side of the machine, in the upper part, is equipped with several parallel tubes 29, arranged in a direction generally perpendicular to the axis A-A '. These tubes 29 are interconnected by crosspieces 30 and thus form a plane, or a table 31, for feeding the machine.
  • the dimensions of this feed table are adapted to the dimensions of the sheets 32 to be bent.
  • the bars 29 are also provided with not shown, adjustable cleats, to maintain a sheet 32 on the feed plane 31 so that the longitudinal axis of the plate 32 is substantially parallel to the axis A-A ' .
  • the bars forming the feed plane 31 are fixed on the crosspiece 9 equipped with support rollers 19. In this way, the height adjustment of the space between the bending roller 20 and the support rollers 19 as a function of the thickness of the sheet is accompanied by a concomitant movement of the feed plane 31 In this way a sheet 32 presented on the feed plane 31 is always, by one of its edges, facing the space provided between the roll 20 and at least one of the rollers 19.
  • the tube T is brought to a welding station which ensures the welding of its two edges.
  • tubes T 60 mm in diameter and 1 meter long or 75 mm in length are produced. diameter for 1, 20 m long.
  • the bending roller 20 is held at both ends and the stress exerted by the plate 32 is directed from bottom to top in Figure 4.
  • the roller 20 tends to take an arrow whose concavity is open towards The base of the machine 1.
  • the support rollers 19 are made to take a reverse arrow, that is to say an arrow of generally equivalent radius, the concavity of which is directed towards the top of the machine 1. Arrows are controlled and compensated in an adjustable manner by the various means described above.
  • the bending roller 20 is held by the rollers 23A supported by the arm 21 whose outer diameter and mass provide sufficient inertia so that it bends little under the forces incurred during the bending of the sheet 32.
  • the roller 20 thus takes an arrow, called residual, corresponding to the arrow not compensated by the arm 21.
  • the support rollers 19 are supported by the ball bearings 16. With the adjusting device 17, a free support of the bearings 16 is obtained on the rollers 19. This support is distributed locally over the length of the rollers 19 This support makes it possible to give the rollers 19 an inverse arrow, corresponding to the residual arrow of the roll 20, so as to keep the space between the rollers 19 and 20 constant throughout their respective lengths.
  • rollers approximately 1, 20 meters long and 20 mm in diameter twelve compensation members 11 are regularly distributed under the rollers 19.
  • twelve subassemblies 23B are also regularly distributed.
  • the subsets 23B and the members 11 are arranged in staggered rows. In this way, during their rotation, the various rollers 19 and 20 are perfectly maintained over most of their respective lengths.
  • an arm 21 partially covering the bending roller 20 makes it possible to reduce the risk of pinching, of driving an Member or a garment of a user by the machine 1.
  • the arm 21 also participates in the safe use of the machine.
  • the arm 21 and the roller 20 are easily dismountable, for example, to be replaced by another sleeve / roller assembly of different diameter.
  • the adjustment of the arrow compensation means of the support rollers 19 is different from that described.
  • I! can be an electrical device, hydraulic or threaded rod.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Inorganic Insulating Materials (AREA)
  • Basic Packing Technique (AREA)

Abstract

A roll bender machine for bending metal sheets which includes a roller driven in rotation and about which the sheet metal is rolled and at least two backing rollers adapted to receive and bear against a sheet while it is being bent around the roller. The backing rollers are mounted to rotate on a support that is adjustable. The bending roller and backing rollers are each associated with at least one set of devices for compensating their deflection. An arm is mounted on the machine for receiving coiled sheet metal and is provided with a housing in which the bending roller is at least partially received.

Description

MACHINE A CINTRER LES TOLES ET LIGNE DE FABRICATION INCORPORANT UNE TELLE MACHINE BANDING MACHINE FOR SHEETS AND MANUFACTURING LINE INCORPORATING SUCH A MACHINE
L'invention a trait à une machine à cintrer les tôles et, plus particulièrement, à une machine de type rouleuse. L'invention a également trait à une machine de fabrication de tubes ou de cylindre par cintrage de tôles, cette installation incorporant une machine à cintrer. Le terme rouleuse désigne toutes les machines permettant de réaliser un tube ou une virole à partir d'une plaque métallique de faible épaisseur, notamment d'une tôle. La réalisation de tubes ou de viroles à partir de tôles s'effectue par cintrage, c'est-à-dire par courbure de la tôle selon un rayon de courbure correspondant à celui du tube ou de la virole. En particulier, l'invention concerne des rouleuses pour réaliser des tubes ou des viroles d'un diamètre le plus faible possible en fonction de la longueur du tube et de l'épaisseur de sa paroi, par exemple des tubes de 60 mm de diamètre pour une longueur d'environ 1 mètre et une épaisseur de 0,5 mm.The invention relates to a machine for bending sheets and, more particularly, to a rolling machine. The invention also relates to a machine for manufacturing tubes or cylinder by bending sheet metal, this installation incorporating a bending machine. The term "rolling machine" designates all the machines making it possible to produce a tube or a shell from a metal plate of small thickness, in particular of a sheet. The production of tubes or ferrules from sheets is carried out by bending, that is to say by curving the sheet according to a radius of curvature corresponding to that of the tube or ferrule. In particular, the invention relates to rollers for producing tubes or ferrules with the smallest possible diameter depending on the length of the tube and the thickness of its wall, for example 60 mm diameter tubes for a length of about 1 meter and a thickness of 0.5 mm.
On connaît, par FR-B-2 750 061 , des rouleuses comprenant un rouleau de cintrage, entraîné en rotation et autour duquel s'enroule la tôle, ainsi que deux rouleaux d'appui, parallèles au rouleau de cintrage, qui permettent de ménager un passage réglable entre les différents rouleaux, de manière à guider et donner le rayon de courbure désiré à la tôle. Le diamètre externe du rouleau de cintrage gouverne le diamètre minimal du tube ou de la virole que l'on peut obtenir, en un tour, avec la rouleuse. Le diamètre interne du tube ou de la virole ainsi formé varie notamment en fonction de la limite d'élasticité du métal ou de l'alliage métallique de la tôle: plus cette limite est élevée et plus le diamètre final du tube est grand, la tôle ayant tendance à reprendre sa forme initiale. Par exemple, pour des aciers ordinaires, le diamètre minimal du tube est environ 1 ,2 fois le diamètre du rouleau de cintrage. Pour le titane, qui a une forte limite élastique, le diamètre minimal du tube est environ 5 fois le diamètre du rouleau de cintrage. Pour réaliser un tube en inox d'un diamètre interne de 80 mm, tel qu'utilisé pour des conduits de cheminée, le diamètre du rouleau de cintrage doit être 1 ,4 fois inférieur, c'est-à-dire voisin de 55 mm. Compte tenu des contraintes qu'il subit lors d'une opération de roulage, un rouleau de cintrage de ce diamètre, d'une longueur voisine d'un mètre, ne reste pas rectiligne, mais à tendance à présenter une flèche importante. De même, les rouleaux d'appui ont tendance à présenter une flèche. Ce problème de flèche peut également s'accompagner, selon les contraintes exercées par la tôle, d'un début de vrillage du rouleau de cintrage.FR-B-2,750,061 discloses rollers comprising a bending roller, driven in rotation and around which the sheet is wound, as well as two support rollers, parallel to the bending roll, which make it possible to an adjustable passage between the different rollers, so as to guide and give the desired radius of curvature to the sheet. The outer diameter of the bending roller governs the minimum diameter of the tube or shell that can be obtained in one revolution with the rolling machine. The internal diameter of the tube or ferrule thus formed varies in particular as a function of the elastic limit of the metal or of the metal alloy of the sheet: the higher this limit, the greater the final diameter of the tube, the sheet metal tending to return to its original form. For example, for ordinary steels, the minimum diameter of the tube is about 1.2 times the diameter of the bending roll. For titanium, which has a high yield strength, the minimum diameter of the tube is about 5 times the diameter of the bending roll. To make a stainless steel tube with an internal diameter of 80 mm, as used for chimney flues, the diameter of the bending roller must be 1, 4 times smaller, that is to say close to 55 mm . Given the constraints it undergoes during a rolling operation, a bending roller of this diameter, a length close to one meter, does not remain rectilinear, but tends to have a large arrow. Likewise, the support rollers tend to have an arrow. This deflection problem can also be accompanied, depending on the stresses exerted by the sheet, a start twisting of the bending roller.
Dans le cas où les rouleaux de cintrage et d'appui présentent une flèche, le tube réalisé est bombé en son milieu. On parle de « forme de tonneau ».In the case where the bending and support rollers have an arrow, the tube is curved in the middle. We talk about "barrel shape".
FR-B-2 750 061 décrit une solution pour résoudre la flèche des rouleaux d'appui par l'utilisation de plusieurs rouleaux d'appui de faible longueur alignés, ou, en variante, de rouleaux d'appui de longueur voisine de celle du rouleau de cintrage qui reposent sur plusieurs petits rouleaux.FR-B-2 750 061 describes a solution for resolving the deflection of the support rollers by the use of a plurality of aligned short-length support rollers, or, alternatively, support rollers of length close to that of the bending roll that rest on several small rollers.
EP-A-O 477 751 décrit un rouleau supérieur et un rouleau inférieur, ce dernier étant flanqué de deux rouleaux parallèles. Des galets réglables portés par des poutres et mobiles dans des coulisseaux, viennent en appui réglable sur les rouleaux situés en partie basse afin de compenser leur flèche.EP-A-0 477 751 discloses an upper roll and a lower roll, the latter being flanked by two parallel rollers. Adjustable rollers carried by beams and movable in sliders, come to adjustable support on the rollers located in the lower part to compensate their arrow.
Ces dispositifs permettent de compenser la seule flèche des rouleaux d'appui. Cette compensation n'est pas contrôlée et la flèche du rouleau de cintrage n'est pas compensée. Un tel système ne permet pas d'obtenir des tubes réellement cylindriques de diamètre voisin de 80 mm pour une longueur voisine de 1 ,20 mètres.These devices make it possible to compensate for the single arrow of the support rollers. This compensation is not controlled and the arrow of the bending roller is not compensated. Such a system does not make it possible to obtain truly cylindrical tubes with a diameter of about 80 mm for a length close to 1.20 meters.
C'est à cet inconvénient qu'entend plus particulièrement remédier l'invention en proposant une rouleuse adaptée à la réalisation de tubes de rapport longueur/diamètre élevé et cylindriques.It is to this disadvantage that the invention more particularly intends to remedy by proposing a rolling machine adapted to the production of tubes of high length / diameter ratio and cylindrical.
A cet effet, l'invention a pour objet une machine à cintrer les tôles, de type rouleuse, comprenant d'une part un rouleau, dit de cintrage, entraîné en rotation et autour duquel s'enroule la tôle, et d'autre part, au moins deux rouleaux d'appui adaptés pour recevoir en appui une tôle en cours de cintrage autour du rouleau de cintrage, les rouleaux d'appui étant montés libres en rotation sur un support réglable en hauteur, de manière à adapter le jeu entre le rouleau de cintrage et les rouleaux d'appui à l'épaisseur de la tôle, le rouleau de cintrage étant associé à au moins un jeu de moyens de compensation au moins partielle de sa flèche, les rouleaux d'appui étant associés à au moins un jeu de moyens de compensation de leur flèche, le jeu étant réglable selon la flèche résiduelle du rouleau de cintrage, caractérisée en ce que le jeu de moyens de compensation de la flèche du rouleau de cintrage comprend un bras pourvu d'un logement dans lequel est reçu partiellement le rouleau, ainsi que des moyens de maintien du rouleau dans le logement.For this purpose, the subject of the invention is a sheet-type bending machine, of rolling type, comprising on the one hand a bending roll, driven in rotation and around which the sheet is wound, and on the other hand at least two support rollers adapted to receive in support a sheet being bent around the bending roller, the support rollers being rotatably mounted on a height-adjustable support, so as to adapt the clearance between the bending roller and the support rollers to the thickness of the sheet, the bending roller being associated with at least one set of at least partial compensation means of its arrow, the support rollers being associated with at least one game of means for compensating for their deflection, the clearance being adjustable according to the residual deflection of the bending roller, characterized in that the set of means for compensating the deflection of the bending roller comprises an arm provided with a housing in which is partially received the roller, and means for holding the roller in the housing.
Une telle rouleuse permet de compenser, de manière coordonnée, les flèches des différents rouleaux et donc de former des tubes cylindriques.Such a roller makes it possible to compensate, in a coordinated manner, the arrows of the different rollers and thus to form cylindrical tubes.
Selon des aspects avantageux, mais non obligatoires de l'invention, la machine peut incorporer une ou plusieurs des caractéristiques suivantes :According to advantageous but not compulsory aspects of the invention, the machine may incorporate one or more of the following features:
- le logement est une gorge sur la longueur de laquelle sont répartis au moins trois jeux de moyens de maintien du rouleau de cintrage avec une flèche minimale, lorsque celui-ci est en rotation.- The housing is a groove along the length of which are distributed at least three sets of holding means of the bending roller with a minimum deflection when it is rotating.
- chacun des jeux de moyens de maintien du rouleau de cintrage comprend deux galets en appui sur le rouleau selon une direction globalement perpendiculaire à un axe principal du logement.each of the sets of means for holding the bending roller comprises two rollers resting on the roll in a direction generally perpendicular to a main axis of the housing.
- la machine comprend au moins trois jeux de moyens de compensation de la flèche des rouleaux d'appui.the machine comprises at least three sets of means for compensating the deflection of the support rollers.
- chacun des jeux de moyens de compensation de la flèche des rouleaux d'appui comprend au moins trois roulements à billes juxtaposés et fixés sur un support réglable en hauteur, par exemple au moyen d'une cale pentée. Chacun de ces jeux de moyens de compensation est réglable en hauteur individuellement au moyen d'une vis micrométrique.each of the sets of means for compensating the deflection of the support rollers comprises at least three ball bearings juxtaposed and fixed on a support adjustable in height, for example by means of a sloped wedge. Each of these sets of compensation means is height-adjustable individually by means of a micrometer screw.
- tous les jeux de moyens de compensation de la flèche des rouleaux d'appui sont montés coulissant sur un unique socle, lui-même réglable en hauteur au moyen d'au moins deux cales pentées.- All sets of means of compensation of the arrow of the support rollers are slidably mounted on a single base, itself adjustable in height by means of at least two sloping wedges.
- les jeux des moyens de maintien du rouleau de cintrage sont disposés sensiblement en quinconce par rapport aux jeux de moyens de compensation de flèche des rouleaux d'appui.- The sets of bending roller holding means are arranged substantially staggered relative to the sets of arrow compensation means of the support rollers.
- le rouleau de cintrage est supporté par un bras avec lequel il est monté de façon amovible sur la machine.- The bending roller is supported by an arm with which it is removably mounted on the machine.
L'invention concerne également une ligne de fabrication de tubes ou de cylindres par cintrage de tôles comprenant au moins une machine à cintrer les tôles réalisée selon l'une des caractéristiques précédentes. L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lecture de la description qui va suivre d'un mode de réalisation d'une machine à cintrer les tôles conforme à l'invention, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés dans lesquels :The invention also relates to a line for manufacturing tubes or cylinders by bending sheet metal comprising at least one sheet bending machine made according to one of the preceding characteristics. The invention will be better understood and other advantages thereof will appear more clearly on reading the following description of an embodiment of a sheet bending machine according to the invention, given only to by way of example and with reference to the appended drawings in which:
- la figure 1 est une vue en perspective, simplifiée, d'une machine conforme à un mode de réalisation de l'invention, une tôle étant représentée avant cintrage, en traits mixtes,FIG. 1 is a perspective view, simplified, of a machine according to an embodiment of the invention, a sheet being shown before bending, in phantom,
- la figure 2 est une coupe partielle selon le plan II de la partie supérieure de la machine représentée à la figure 1 , pour plus de clarté seul trois jeux de moyens de maintien du rouleau de cintrage et trois jeux de moyens de compensation d'un rouleau d'appui sont représentés,FIG. 2 is a partial section along the plane II of the upper part of the machine represented in FIG. 1, for the sake of clarity only three sets of means for holding the bending roller and three sets of compensation means of one roll of support are represented,
- la figure 3 est une vue de dessous, partielle et en perspective, du rouleau de cintrage et de certains moyens de compensation de sa flèche,FIG. 3 is a bottom, partial and perspective view of the bending roller and of certain means for compensating its arrow,
- la figure 4 est une coupe partielle à plus grande échelle selon la ligne IV- IV à la figure 1 ,FIG. 4 is a partial section on a larger scale along line IV-IV in FIG. 1;
- la figure 5 est une section longitudinale partielle, à une échelle différente, selon la ligne V-V à la figure 4 d'un système de maintien du rouleau de cintrage dans un organe de compensation de la flèche,FIG. 5 is a partial longitudinal section, on a different scale, along line V-V in FIG. 4 of a system for holding the bending roller in an element for compensating for the jib,
- la figure 6 est une vue en perspective d'un jeu de moyens de compensation de la flèche des rouleaux d'appui, la rainure dans laquelle repose cette pièce étant représenté en traits mixtes etFIG. 6 is a perspective view of a set of means for compensating the deflection of the support rollers, the groove in which this piece rests being shown in phantom and
- les figures 7 à 9 sont des schémas illustrant les différentes phases du cintrage d'une tôle. La-mad^n@-4-Gmtr^r4ss4ôJes 1, dite rouleuse, représentée à la figure 1 comprend un corps principal 2 globalement configuré en H. L'écartement entre les montants 3, 4 du H est adapté à la longueur finale du tube T que l'on souhaite réaliser. La barre transversale 5 du corps 2 de la machine supporte une traverse 6 fixe maintenue globalement horizontale. Cette traverse 6 est munie sur sa face supérieure de trois encoches 7, inclinées à environ 45° par rapport à un axe longitudinal A-A' de la traverse 5. La traverse 6 est déplaçable longitudinalement, par un dispositif hydraulique 60, selon une direction parallèle à l'axe A-A'. Une seconde traverse 9, équipée sur sa face inférieure d'au moins deux cales 8, est posée sur la traverse 6. Ainsi, lorsqu'on déplace simultanément de droite à gauche ou de gauche à droite à la figure 2, la traverse 6, les cales 8 par glissement sur la pente des encoches 7 sur lesquelles elles reposent, font monter ou descendre la traverse 9, selon une direction globalement perpendiculaire à l'axe A-A' et parallèle au plan de la figure 2. Par ce dispositif, on transforme un mouvement horizontal en mouvement vertical.- Figures 7 to 9 are diagrams illustrating the different phases of the bending of a sheet. 1, said rolling machine, represented in FIG. 1, comprises a main body 2 generally configured in H. The spacing between the uprights 3, 4 of the H is adapted to the final length of the T tube that we want to achieve. The crossbar 5 of the body 2 of the machine supports a cross-member 6 fixed held generally horizontal. This crosspiece 6 is provided on its upper face with three notches 7, inclined at approximately 45 ° relative to a longitudinal axis AA 'of the crossbar 5. The cross member 6 is movable longitudinally, by a hydraulic device 60, in a direction parallel to the axis A-A '. A second crosspiece 9, equipped on its underside with at least two shims 8, is placed on the crosspiece 6. Thus, when moving from right to left simultaneously or from left to right in FIG. the shims 8 by sliding on the slope of the notches 7 on which they rest, raise or lower the cross member 9, in a direction generally perpendicular to the axis AA 'and parallel to the plane of Figure 2. By this device, it transforms a horizontal movement in vertical movement.
La traverse 9 est équipée, sur sa face supérieure, d'une rainure 10 longitudinale. Pour plus de clarté, cette rainure, est représentée en traits mixtes à la figure 6. Des organes 11 de moyens de compensation de la flèche des rouleaux d'appui sont partiellement engagés dans cette rainure 10 et sont mobiles dans celle-ci.The cross member 9 is equipped on its upper face with a longitudinal groove. For the sake of clarity, this groove is shown in phantom in FIG. 6. Devices 11 for compensating the deflection of the support rollers are partially engaged in this groove 10 and are movable therein.
Chacun des organes 11 ou jeux, comprend un corps principal 12 globalement configuré en U à fond plat. La face intérieure 13 du fond est inclinée. Une cale pentée, ou « coin » 14 dont la face inclinée a une pente sensiblement identique à celle de la face 13, est positionnée sur le fond du corps principal 12. Un châssis 15 est posé sur la face supérieure de la cale 14. Ce châssis supporte trois roulements à billes 16 juxtaposés et dont les axes de rotation Xi6 sont parallèles et orientés selon une direction globalement perpendiculaire au plan de la figure 4. Les roulements à billes 16 forment ainsi un chemin de roulement globalement parallèle à la pente du fond 13.Each of the members 11 or games, comprises a main body 12 generally configured U flat bottom. The inner face 13 of the bottom is inclined. A sloped shim, or "wedge" 14 whose inclined face has a slope substantially identical to that of the face 13, is positioned on the bottom of the main body 12. A frame 15 is placed on the upper face of the shim 14. chassis supports three juxtaposed ball bearings 16 whose axes of rotation Xi 6 are parallel and oriented in a direction generally perpendicular to the plane of Figure 4. The ball bearings 16 thus form a raceway generally parallel to the slope of the bottom 13.
Un dispositif 17 de réglage comprenant une vis micrométrique 17A et équipé d'un compteur 17B est monté sur une aile du corps 12. Le dispositif 17 n'est pas représenté à la figure 4 pour la clarté du dessin. L'extrémité de la vis 17A est reliée à un bord de la cale pentée 14. Ainsi, en vissant ou dévissant la vis 17A, l'extrémité de celle-ci pénètre plus au moins dans l'espace ménagé entre les ailes du corps 12 et pousse la cale 14 en direction de l'autre aile du corps 12. Ce déplacement Fi de la cale 14 se fait sur la face inclinée du fond 13, ce qui a pour effet de soulever ou d'abaisser le châssis 15 qui est posé sur la face supérieure de la cale 14. Ce mouvement vertical est représenté par la double flèche F2 à la figure 4.A setting device 17 comprising a micrometer screw 17A and equipped with a counter 17B is mounted on a wing of the body 12. The device 17 is not shown in Figure 4 for clarity of the drawing. The end of the screw 17A is connected to an edge of the sloping wedge 14. Thus, by screwing or unscrewing the screw 17A, the end of the latter penetrates more or less into the space between the wings of the body 12 and pushes the wedge 14 towards the other wing of the body 12. This displacement Fi of the wedge 14 is on the inclined face of the bottom 13, which has the effect of raising or lowering the frame 15 which is placed on the upper face of the wedge 14. This vertical movement is represented by the double arrow F 2 in FIG.
Un relief 18 est réalisé en saillie sur la face extérieure du fond 13A. Il est d'une forme adaptée pour s'insérer, à jeu réduit, et pour coulisser dans la rainure 10 de la traverse 9. On règle l'écartement des organes 11 pour que, lorsqu'ils sont en position dans la rainure 10, les roulements à billes 16 soient régulièrement espacés, parallèlement à l'axe A-A'.A relief 18 is projecting on the outer face of the bottom 13A. It is of a form adapted to fit, to play reduced, and to slide in the groove 10 of the cross member 9. The spacing of the members 11 is adjusted so that, when in position in the groove 10, the ball bearings 16 are evenly spaced, parallel to the axis A-A '.
Deux tiges cylindriques 19 à section circulaire, pleine ou creuse, réalisées de préférence en un métal ou un alliage de métaux inoxydables sont disposées sur le chemin de roulement formé par les roulements à billes 16. Ces deux tiges constituent les rouleaux d'appui 19 de la machine. Elles sont montées libres en rotation tout en étant maintenues par leurs extrémités dans des logements ménagés dans des montants verticaux solidaires de la traverse 9. Les rouleaux d'appui 19 sont disposés de manière à ce que, au niveau de chaque organe 11 , chaque rouleau 19 soit supporté par deux roulements à billes 16 juxtaposés. Dans cette configuration, les axes longitudinaux X19 des rouleaux 19 et les axes longitudinaux Xi6 des roulements à billes 16 sont globalement parallèles à l'axe A-A' de la traverse 6. Les rouleaux 19 et les roulements à billes 16 sont entraînés les uns par rapport aux autres en rotation par friction.Two cylindrical rods 19 of circular section, solid or hollow, preferably made of a metal or an alloy of stainless metals are disposed on the raceway formed by the ball bearings 16. These two rods constitute the support rollers 19 of the machine. They are mounted free in rotation while being held by their ends in housings formed in vertical uprights secured to the cross member 9. The support rollers 19 are arranged so that, at each member 11, each roller 19 is supported by two ball bearings 16 juxtaposed. In this configuration, the longitudinal axes X 19 of the rollers 19 and the longitudinal axes Xi 6 of the ball bearings 16 are generally parallel to the axis AA 'of the crossmember 6. The rollers 19 and the ball bearings 16 are driven together. compared to others in rotation by friction.
La partie supérieure du corps principal 2 de la machine reçoit le rouleau de cintrage 20 autour duquel s'enroule la tôle une fois cintrée. L'axe X2o du rouleau 20 est disposé selon une direction globalement parallèle à l'axe A-A'. Le rouleau 20 est maintenu le plus rectiligne possible par des moyens de compensation de sa flèche.The upper part of the main body 2 of the machine receives the bending roller 20 around which winds the sheet when bent. The axis X 2 o of the roll 20 is disposed in a direction generally parallel to the axis A-A '. The roller 20 is kept as straight as possible by means of compensation of its arrow.
Ces moyens de compensation de la flèche comprennent un bras 21 de forme extérieure cylindrique, plein, à section circulaire, réalisé dans un matériau rigide. Ce bras 21 présente une forte inertie élastique c'est-à-dire qu'il reste globalement rectiligne ou, pour le moins, qu'il présente une flèche faible lorsqu'il est soumis à une contrainte, en particulier un effort de flexion. De manière avantageuse, son diamètre extérieur est globalement compris entre trois et six fois celui du rouleau de cintrage 20.These means of compensation of the arrow comprise an arm 21 of cylindrical outer shape, solid, circular section, made of a rigid material. This arm 21 has a high elastic inertia that is to say that it remains generally rectilinear or, at least, it has a low deflection when it is subjected to stress, in particular a bending force. Advantageously, its outer diameter is generally between three and six times that of the bending roller 20.
Ce bras 21 est pourvu, sur pratiquement toute sa longueur, d'une gorge longitudinale 22. La gorge 22 est à fond plat. La largeur. de cette gorge 22 est sensiblement supérieure au diamètre du rouleau de cintrage 20.This arm 21 is provided, over substantially its entire length, with a longitudinal groove 22. The groove 22 is flat-bottomed. The width. of this groove 22 is substantially greater than the diameter of the bending roller 20.
Cette gorge 22 est propre à recevoir des organes assurant un contact en appui entre le rouleau 20 et le bras 21. Plusieurs sous-ensembles supports 23 du rouleau 20 sont répartis sur la longueur de la gorge 22. Trois sous-ensembles 23, ce qui est un minimum, sont représentés à la figure 2 mais leur nombre est variable et choisi lors de la conception de Ia rouleuse 1.This groove 22 is adapted to receive organs providing a bearing contact between the roller 20 and the arm 21. Several support subassemblies 23 of the roll 20 are distributed over the length of the groove 22. Three subassemblies 23, which is a minimum, are shown in FIG. 2, but their number is variable and chosen during the design of Ia. rolling machine 1.
Au sein de chaque sous-ensemble 23, des galets 23A sont montés sur un berceau 23B. Ce berceau 23B a globalement une forme de U à fond plat. Les dimensions et la forme extérieures du berceau 23B sont adaptées à celles de la gorge 22. Les formes et les dimensions intérieures du berceau 23B sont adaptées pour épouser, sans contact, la circonférence du rouleau 20.Within each subassembly 23, rollers 23A are mounted on a cradle 23B. This cradle 23B has a generally U-shaped flat bottom. The dimensions and the external shape of the cradle 23B are adapted to those of the groove 22. The shapes and internal dimensions of the cradle 23B are adapted to marry, without contact, the circumference of the roll 20.
La figure 5 est une section dans deux plans différents du berceau 23B passant, d'une part dans le plan médian du berceau 23B (partie gauche de la figure) et, d'autre part, dans le plan médian d'un axe de support 26 d'un galet 23A (partie droite de la figure).FIG. 5 is a section in two different planes of the cradle 23B passing on the one hand in the median plane of the cradle 23B (left part of the figure) and, on the other hand, in the median plane of a support axis 26 of a roller 23A (right part of the figure).
Les galets 23A sont montés, par paire, sur chaque berceau 23B. Une vis 25 traverse le fond du berceau 23B et fixe ce dernier au fond de la gorge 22. Lorsque les berceaux 23B sont en place dans la gorge 22, les galets 23A sont, chacun, libres en rotation autour d'un axe 26 maintenu dans deux paliers 23C ménagés dans le berceau 23B. Les axes 26 sont orientés selon une direction parallèle à un axe longitudinal X22 de la gorge 22.The rollers 23A are mounted, in pairs, on each cradle 23B. A screw 25 passes through the bottom of the cradle 23B and fixes the latter at the bottom of the groove 22. When the cradles 23B are in place in the groove 22, the rollers 23A are each free to rotate about an axis 26 maintained in two bearings 23C formed in the cradle 23B. The axes 26 are oriented in a direction parallel to a longitudinal axis X 22 of the groove 22.
La gorge 22 ménagée dans le bras 21 est ainsi équipée d'au moins trois sous-ensembles 23 portant, chacun, deux galets 23A. Les dimensions intérieures de chaque berceau 23B sont adaptées pour coiffer partiellement avec un jeu minimal, le rouleau 20. Les galets 23A sont montés sur chaque berceau 23B de façon à venir en contact permanent avec le rouleau 20, tout en permettant la libre rotation du rouleau 20 et des galets 23A en appui sur le rouleau 20.The groove 22 formed in the arm 21 is thus equipped with at least three subassemblies 23 each carrying two rollers 23A. The inner dimensions of each cradle 23B are adapted to partially cap with a minimum clearance, the roller 20. The rollers 23A are mounted on each cradle 23B so as to come into permanent contact with the roller 20, while allowing the free rotation of the roller 20 and rollers 23A resting on the roll 20.
On assure le maintien de ce dernier dans chaque berceau 23B situé dans la gorge 22 par les extrémités 200, 201 du rouleau 20. Une extrémité 200 est reliée à un organe d'entraînement en rotation, par exemple un moteur M électrique ou hydraulique. L'autre extrémité 201 est pourvue d'un logement 202 dans lequel s'engage un relief ou une tige 203 fixée à une extrémité du bras 21. Les dimensions du logement 202 et de la tige 203 sont propres à assurer la libre rotation du rouleau 20, ce qui permet lorsque le rouleau 20 est en rotation et mis sous contrainte, de préserver le plus possible sa rectitude.This is maintained in each cradle 23B located in the groove 22 by the ends 200, 201 of the roller 20. An end 200 is connected to a rotary drive member, for example an electric motor M or hydraulic. The other end 201 is provided with a housing 202 in which engages a relief or rod 203 attached to one end of the arm 21. The dimensions of the housing 202 and the rod 203 are adapted to ensure the free rotation of the roll 20, which makes it possible, when the roll 20 is in rotation and put under stress, to preserve as much as possible its straightness.
Lorsque le rouleau 20 est appui sur les galets 23A et en place dans la gorge 22, une partie de sa circonférence, soit environ 20 % se situe à l'extérieur de la gorge 22, donc hors du bras 21. Cette partie du rouleau forme la zone active de celui-ci, propre à cintrer une tôle.When the roller 20 is resting on the rollers 23A and in place in the groove 22, part of its circumference, ie about 20%, lies outside the groove 22, thus outside the arm 21. This part of the roll forms the active area of it, suitable for bending a sheet.
L'ensemble, formé par le rouleau 20 et le bras 21 , est disposé en partie supérieure de la machine 1 , entre les extrémités libres des montants 3 et 4 du corps principal 2. A son extrémité 200, le rouleau 20 est relié au moteur M d'entraînement en rotation, à travers un orifice ménagé dans le talon 21A du bras 21.The assembly, formed by the roller 20 and the arm 21, is disposed in the upper part of the machine 1, between the free ends of the uprights 3 and 4 of the main body 2. At its end 200, the roller 20 is connected to the motor M driving in rotation through an orifice in the heel 21A of the arm 21.
Le bras 21 est fixé au corps principal, par exemple par boulonnage d'une de ses extrémités. L'autre extrémité du manchon 21 est pourvue d'un mandrin tronconique 27. Ce mandrin est logé, lorsque le rouleau 20 est en rotation, dans un bras 28 mobile. Un mouvement de pivotement du bras 28 autour d'un axe 28A fixé sur le corps 2, permet de dégager le mandrin 27 et de libérer l'extrémité du bras 21. Ce mouvement est représenté par la flèche F3 à la figure 2.The arm 21 is fixed to the main body, for example by bolting one of its ends. The other end of the sleeve 21 is provided with a frustoconical mandrel 27. This mandrel is housed, when the roller 20 is rotating, in a movable arm 28. A pivoting movement of the arm 28 about an axis 28A fixed on the body 2 makes it possible to disengage the mandrel 27 and to release the end of the arm 21. This movement is represented by the arrow F 3 in FIG.
L'ensemble formé du rouleau 20 et du bras 21 est positionné, de manière fixe, au-dessus des deux rouleaux d'appui 19. Ceux-ci sont réglés en hauteur, de manière à ce que l'espace entre les rouleaux 20 et 19 corresponde globalement à l'épaisseur de la tôle à cintrer.The assembly formed of the roller 20 and the arm 21 is fixedly positioned above the two support rollers 19. These are adjusted in height, so that the space between the rollers 20 and 19 corresponds globally to the thickness of the sheet to be bent.
Le réglage de cet espace est réalisé par le déplacement vertical de la traverse 9 sous l'action du déplacement des cales 8 dans les encoches 7.The adjustment of this space is achieved by the vertical displacement of the cross member 9 under the action of the displacement of the wedges 8 in the notches 7.
Un côté de la machine, en partie supérieure, est équipé de plusieurs tubes 29 parallèles, disposés selon une direction globalement perpendiculaire à l'axe A-A'. Ces tubes 29 sont reliés entre eux par des traverses 30 et forment ainsi un plan, ou une table 31 , d'alimentation de la machine. Les dimensions de cette table d'alimentation sont adaptées aux dimensions des tôles 32 à cintrer.One side of the machine, in the upper part, is equipped with several parallel tubes 29, arranged in a direction generally perpendicular to the axis A-A '. These tubes 29 are interconnected by crosspieces 30 and thus form a plane, or a table 31, for feeding the machine. The dimensions of this feed table are adapted to the dimensions of the sheets 32 to be bent.
Les barres 29 sont également pourvues de taquets non représentés, réglables, permettant de maintenir une tôle 32 sur le plan d'alimentation 31 de manière à ce que l'axe longitudinal de la tôle 32 soit sensiblement parallèle à l'axe A-A'. Avantageusement, les barres formant le plan d'alimentation 31 sont fixées sur la traverse 9 équipé des rouleaux 19 d'appui. De cette manière, le réglage en hauteur de l'espace entre le rouleau de cintrage 20 et les rouleaux 19 d'appui en fonction de l'épaisseur de la tôie s'accompagne d'un mouvement, concomitant, du plan d'alimentation 31. De cette manière une tôle 32 présentée sur le plan d'alimentation 31 se trouve toujours, par un de ses bords, en regard avec l'espace ménagé entre le rouleau 20 et, au moins, un des rouleaux 19.The bars 29 are also provided with not shown, adjustable cleats, to maintain a sheet 32 on the feed plane 31 so that the longitudinal axis of the plate 32 is substantially parallel to the axis A-A ' . Advantageously, the bars forming the feed plane 31 are fixed on the crosspiece 9 equipped with support rollers 19. In this way, the height adjustment of the space between the bending roller 20 and the support rollers 19 as a function of the thickness of the sheet is accompanied by a concomitant movement of the feed plane 31 In this way a sheet 32 presented on the feed plane 31 is always, by one of its edges, facing the space provided between the roll 20 and at least one of the rollers 19.
Lorsque l'on positionne une tôle 32 sur la table 31 avec un rouleau 19 en contact avec la tôle 32 et que le rouleau 20 est entraîné en rotation, la tôle 32 est entraînée entre le rouleau 20 et un des rouleaux 19. Ce passage de la tôle 32 entre les rouleaux engendre le cintrage de la tôle, c'est-à-dire lui donne une courbure correspondant globalement au rayon d'un cercle passant entre les trois rouleaux 19 et 20. Le cintrage s'effectue sur toute la longueur de la tôle et sur toute sa largeur. Ainsi en fin de cintrage, la tôle 32 est roulée sur elle- même, en une seule fois, autour du bras 21. Il suffit alors de déplacer, selon la flèche F3, le bras pivotant 28 pour dégager le bras 21 et faire coulisser vers l'extérieur de la machine 1 le tube T ainsi formé.When a sheet 32 is positioned on the table 31 with a roll 19 in contact with the sheet 32 and the roll 20 is rotated, the sheet 32 is driven between the roll 20 and one of the rollers 19. the sheet 32 between the rollers causes the bending of the sheet, that is to say gives it a curvature corresponding generally to the radius of a circle passing between the three rollers 19 and 20. The bending is carried out over the entire length of the sheet and over its entire width. Thus, at the end of bending, the sheet 32 is rolled on itself, all at once, around the arm 21. It is then sufficient to move, according to the arrow F 3 , the pivoting arm 28 to disengage the arm 21 and slide towards the outside of the machine 1 the tube T thus formed.
Il est possible d'effectuer l'évacuation du tube T de manière automatisée. Dans ce cas, le tube T est amené à un poste de soudage qui assure le soudage de ses deux bords.It is possible to evacuate the tube T automatically. In this case, the tube T is brought to a welding station which ensures the welding of its two edges.
Avantageusement, avec une telle configuration, pour des tôles 32 en acier inoxydable d'une épaisseur allant de 0,4 à 0,6 mm, on réalise des tubes T de 60 mm de diamètre et de 1 mètre de long ou de 75 mm de diamètre pour 1 ,20 m de long.Advantageously, with such a configuration, for stainless steel sheets 32 having a thickness of 0.4 to 0.6 mm, tubes T 60 mm in diameter and 1 meter long or 75 mm in length are produced. diameter for 1, 20 m long.
En effet, lors du cintrage de la tôle les efforts subis par les rouleaux 19 et 20 pour arriver au tube final, compte tenu de leur rapport respectif diamètre/longueur et de l'épaisseur de la tôle, auraient tendance à provoquer des flexions des rouleaux 19 et 20. Ces flèches sont compensées par la grande inertie du bras 21 et par l'appui des galets 23A sur le rouleau 20 et l'appui des roulements à billes 16 sur les rouleaux 19.Indeed, during the bending of the sheet metal the forces experienced by the rollers 19 and 20 to reach the final tube, given their respective ratio diameter / length and the thickness of the sheet, would tend to cause bending of the rollers 19 and 20. These arrows are compensated by the great inertia of the arm 21 and by the support of the rollers 23A on the roll 20 and the support of the ball bearings 16 on the rollers 19.
En particulier, le rouleau de cintrage 20 est tenu à ses deux extrémités et la contrainte exercée par la tôle 32 est dirigée de bas en haut à la figure 4. Le rouleau 20 à tendance à prendre une flèche dont la concavité est ouverte vers le socle de la machine 1. De manière analogue, on fait prendre aux rouleaux d'appui 19 une flèche inverse c'est-à-dire une flèche de rayon globalement équivalent dont la concavité est orientée vers le haut de la machine 1. Ces flèches sont contrôlées et compensées de manière réglable par les différents moyens décrits ci-dessus.In particular, the bending roller 20 is held at both ends and the stress exerted by the plate 32 is directed from bottom to top in Figure 4. The roller 20 tends to take an arrow whose concavity is open towards The base of the machine 1. In a similar way, the support rollers 19 are made to take a reverse arrow, that is to say an arrow of generally equivalent radius, the concavity of which is directed towards the top of the machine 1. Arrows are controlled and compensated in an adjustable manner by the various means described above.
En effet, le rouleau de cintrage 20, est maintenu par les galets 23A supportés par le bras 21 plein dont le diamètre extérieur et la masse offrent une inertie suffisante pour qu'il fléchisse peu sous les efforts subis lors du cintrage de la tôle 32. Le rouleau 20 prend ainsi une flèche, dite résiduelle, correspondant à la flèche non compensée par le bras 21.Indeed, the bending roller 20 is held by the rollers 23A supported by the arm 21 whose outer diameter and mass provide sufficient inertia so that it bends little under the forces incurred during the bending of the sheet 32. The roller 20 thus takes an arrow, called residual, corresponding to the arrow not compensated by the arm 21.
De manière analogue, les rouleaux d'appui 19 sont supportés par les roulements à billes 16. Grâce au dispositif de réglage 17, on obtient un appui franc des roulements 16 sur les rouleaux 19. Cet appui est réparti localement sur la longueur des rouleaux 19. Cet appui permet de donner aux rouleaux 19, une flèche inverse, correspondant à la flèche résiduelle du rouleau 20, de manière à maintenir constant, sur toute leurs longueurs respectives, l'espace entre les rouleaux 19 et 20.Similarly, the support rollers 19 are supported by the ball bearings 16. With the adjusting device 17, a free support of the bearings 16 is obtained on the rollers 19. This support is distributed locally over the length of the rollers 19 This support makes it possible to give the rollers 19 an inverse arrow, corresponding to the residual arrow of the roll 20, so as to keep the space between the rollers 19 and 20 constant throughout their respective lengths.
Ce maintien d'un espace constant, de manière réglable entre les rouleaux 19 et 20, permet d'obtenir des tubes T cylindriques à génératrice rectiligne, quelle que soit la tôle 32 utilisée.This maintenance of a constant space, adjustable between the rollers 19 and 20, makes it possible to obtain cylindrical tubes T with a rectilinear generatrix, whatever the sheet 32 used.
En fonction de la longueur des rouleaux 19 et 20 utilisés et de l'épaisseur de la tôle 32, donc de la contrainte qu'elle exerce, il est aisé de calculer le réglage et le nombre des moyens de compensation 11 et 23 nécessaires pour compenser les flèches des rouleaux 19 et 20.Depending on the length of the rollers 19 and 20 used and the thickness of the sheet 32, so the stress it exerts, it is easy to calculate the setting and the number of compensation means 11 and 23 needed to compensate. the arrows of the rollers 19 and 20.
A titre d'exemple, pour des rouleaux d'environ 1 ,20 mètre de long et 20 mm de diamètre, douze organes de compensation 11 sont régulièrement répartis sous les rouleaux 19. Dans le manchon 21 du rouleau 20, douze sous- ensembles 23B sont également régulièrement répartis. Avantageusement, les sous-ensembles 23B et les organes 11 sont disposés en quinconce. De cette manière, lors de leur mise en rotation, les différents rouleaux 19 et 20 sont parfaitement maintenus sur la majeure partie de leur longueur respective.By way of example, for rollers approximately 1, 20 meters long and 20 mm in diameter, twelve compensation members 11 are regularly distributed under the rollers 19. In the sleeve 21 of the roll 20, twelve subassemblies 23B are also regularly distributed. Advantageously, the subsets 23B and the members 11 are arranged in staggered rows. In this way, during their rotation, the various rollers 19 and 20 are perfectly maintained over most of their respective lengths.
Par ailleurs, la présence d'un bras 21 coiffant partiellement le rouleau de cintrage 20 permet de diminuer les risques de pincement, d'entraînement d'un membre ou d'un vêtement d'un utilisateur par la machine 1. Le bras 21 participe donc également à la sécurité d'utilisation de la machine.Moreover, the presence of an arm 21 partially covering the bending roller 20 makes it possible to reduce the risk of pinching, of driving an Member or a garment of a user by the machine 1. The arm 21 also participates in the safe use of the machine.
Le bras 21 et le rouleau 20 sont aisément démontables, par exemple, pour être remplacés par un autre ensemble manchon/rouleau de diamètre différent.The arm 21 and the roller 20 are easily dismountable, for example, to be replaced by another sleeve / roller assembly of different diameter.
Dans d'autres modes de réalisation non représentés, le réglage des moyens de compensation de flèches des rouleaux d'appui 19 est différent de celui décrit. I! peut s'agir d'un dispositif électrique, hydraulique ou de tige filetée. In other embodiments not shown, the adjustment of the arrow compensation means of the support rollers 19 is different from that described. I! can be an electrical device, hydraulic or threaded rod.

Claims

REVENDICATIONS
1. Machine à cintrer les tôles, de type rouleuse, comprenant d'une part un rouleau (20), dit de cintrage, entraîné en rotation et autour duquel s'enroule la tôle (32), et d'autre part, au moins deux rouleaux d'appui (19) adaptés pour recevoir en appui une tôle (32) en cours de cintrage autour dudit rouleau (20) de cintrage, lesdits rouleaux d'appui (19) étant montés libres en rotation sur un support (11) réglable en hauteur, de manière à adapter le jeu entre ledit rouleau1. Sheet bending machine, of roll type, comprising firstly a roll (20), said bending, rotated and around which rolls the sheet (32), and secondly, at least two support rollers (19) adapted to receive in abutment a sheet (32) being bent around said bending roller (20), said support rollers (19) being rotatably mounted on a support (11) adjustable in height, so as to adapt the clearance between said roller
(20) de cintrage et lesdits rouleaux d'appui (19) à l'épaisseur de ladite tôle (32), ledit rouleau (20) de cintrage étant associé à au moins un jeu de moyens (21 , 23) de compensation au moins partielle de sa flèche, lesdits rouleaux d'appui (19) étant associés à au moins un jeu (11) de moyens (12-16) de compensation de leur flèche, ledit jeu (11) étant réglable selon la flèche résiduelle dudit rouleau (20) de cintrage, caractérisée en ce que ledit jeu de moyens (21 , 23) de compensation de la flèche dudit rouleau de cintrage (20) comprend un brasBending roll (20) and said backing rollers (19) to the thickness of said sheet (32), said bending roll (20) being associated with at least one set of at least one compensating means (21, 23). partial of its deflection, said support rollers (19) being associated with at least one set (11) of means (12-16) for compensating their deflection, said clearance (11) being adjustable according to the residual deflection of said roll ( 20), characterized in that said set of means (21, 23) for deflecting the deflection of said bending roller (20) comprises an arm
(21) pourvu d'un logement (22) dans lequel est reçu partiellement ledit rouleau (20), ainsi que des moyens (23A, 23B, 25, 26) de maintien dudit rouleau (20) dans ledit logement (22).(21) provided with a housing (22) in which is partially received said roll (20), and means (23A, 23B, 25, 26) for holding said roll (20) in said housing (22).
2. Machine selon la revendication 1 , caractérisée en ce que ledit logement est une gorge (22) sur la longueur de laquelle sont répartis au moins trois jeux (23) de moyens (23A1 23B, 25, 26) de maintien dudit rouleau (20) avec une flèche minimale, lorsque celui-ci est en rotation.2. Machine according to claim 1, characterized in that said housing is a groove (22) along the length of which are distributed at least three sets (23) of means (23A 1 23B, 25, 26) for holding said roller ( 20) with a minimum deflection when it is rotating.
3. Machine selon l'une des revendications 1 ou 2, caractérisée en ce que chacun desdits jeux (23) de moyens de maintien comprend deux galets (23A) en appui sur ledit rouleau (20) selon une direction globalement perpendiculaire à un axe principal (X22) dudit logement (22).3. Machine according to one of claims 1 or 2, characterized in that each of said sets (23) of holding means comprises two rollers (23A) resting on said roller (20) in a direction generally perpendicular to a main axis (X22) of said housing (22).
4. Machine selon l'une des revendications précédentes, caractérisée en ce qu'elle comprend au moins trois jeux (11) de moyens (12-16) de compensation de la flèche des rouleaux d'appui (19).4. Machine according to one of the preceding claims, characterized in that it comprises at least three sets (11) means (12-16) for compensation of the deflection of the support rollers (19).
5. Machine selon la revendication 4, caractérisée en ce que chacun desdits jeux (11) de moyens de compensation comprend au moins trois roulements à billes (16) juxtaposés et fixés sur un support (15) réglable en hauteur, par exemple au moyen d'une cale pentée (14).5. Machine according to claim 4, characterized in that each of said sets (11) of compensation means comprises at least three ball bearings (16) juxtaposed and fixed on a support (15) adjustable in height, for example by means of a sloping wedge (14).
6. Machine selon l'une des revendications 4 ou 5, caractérisée en ce que chacun desdits jeux (11) de moyens (12-16) de compensation est réglable en hauteur individuellement au moyen d'une vis micrométrique (17A)6. Machine according to one of claims 4 or 5, characterized in that each of said sets (11) of means (12-16) compensation is individually height adjustable by means of a micrometer screw (17A)
7. Machine selon l'une des revendications 4 à 6, caractérisée en ce que tous les jeux (11) de moyens de compensation sont montés coulissant (10,18) sur un unique socle (9), lui-même réglable en hauteur au moyen d'au moins deux cales pentées (8).7. Machine according to one of claims 4 to 6, characterized in that all the sets (11) of compensation means are slidably mounted (10,18) on a single base (9), itself adjustable in height at means of at least two sloping wedges (8).
8. Machine selon l'une des revendications précédentes, caractérisée en ce que lesdits jeux (23) des moyens de maintien (23A, 23B, 25, 26) du rouleau de cintrage (20) sont disposés sensiblement en quinconce par rapport aux jeux (11) de moyens de compensation (12-16) des rouleaux d'appui (19).8. Machine according to one of the preceding claims, characterized in that said sets (23) of the holding means (23A, 23B, 25, 26) of the bending roller (20) are arranged substantially staggered with respect to the games ( 11) compensating means (12-16) of the support rollers (19).
9. Machine selon l'une des revendications précédentes, caractérisée en ce que ledit rouleau de cintrage (20) est supporté par un bras (21) avec lequel il est monté de façon amovible sur ladite machine (1).9. Machine according to one of the preceding claims, characterized in that said bending roller (20) is supported by an arm (21) with which it is removably mounted on said machine (1).
10. Ligne de fabrication de tubes (T) ou de cylindres par cintrage de tôles (32) comprenant au moins une machine à cintrer (1) les tôles (32) réalisée selon l'une des revendications précédentes. 10. Line for manufacturing tubes (T) or cylinders by bending sheets (32) comprising at least one bending machine (1) the sheets (32) made according to one of the preceding claims.
EP05812400A 2004-10-25 2005-10-24 Sheet metal bending machine and production line incorporating a machine of this type Not-in-force EP1804981B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0411359A FR2876927B1 (en) 2004-10-25 2004-10-25 BANDING MACHINE FOR SHEETS AND MANUFACTURING LINE INCORPORATING SUCH A MACHINE
PCT/FR2005/002649 WO2006045942A1 (en) 2004-10-25 2005-10-24 Sheet metal bending machine and production line incorporating a machine of this type

Publications (2)

Publication Number Publication Date
EP1804981A1 true EP1804981A1 (en) 2007-07-11
EP1804981B1 EP1804981B1 (en) 2008-05-28

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EP05812400A Not-in-force EP1804981B1 (en) 2004-10-25 2005-10-24 Sheet metal bending machine and production line incorporating a machine of this type

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US (1) US8061172B2 (en)
EP (1) EP1804981B1 (en)
JP (1) JP2008517767A (en)
CN (1) CN101048241A (en)
AT (1) ATE396798T1 (en)
DE (1) DE602005007261D1 (en)
ES (1) ES2319217T3 (en)
FR (1) FR2876927B1 (en)
WO (1) WO2006045942A1 (en)

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JP4439573B2 (en) * 2008-07-29 2010-03-24 株式会社富士機械工作所 Cylindrical forming equipment
CN101439371B (en) * 2008-12-12 2010-06-23 长治钢铁（集团）锻压机械制造有限公司 Deflection compensation mechanism of upper roll
AT509857B1 (en) * 2010-08-05 2011-12-15 Trumpf Maschinen Austria Gmbh BENDING COMPRESSION WITH A COMPONENT POSITIONING DEVICE AND A METHOD OF OPERATION
CN102319777B (en) * 2011-09-20 2013-04-24 泰安华鲁锻压机床有限公司 Automatic flexibility compensating device of plate bending roll for ship
CN102641919A (en) * 2012-05-07 2012-08-22 南车戚墅堰机车有限公司 Cylinder bracket for crimping
CN104678619A (en) * 2015-03-23 2015-06-03 合肥鑫晟光电科技有限公司 Roller press and rolling method thereof
JP2020127963A (en) * 2019-02-12 2020-08-27 株式会社富士機械工作所 Method of manufacturing noncircular pipe body and pipe body molding device
EP4271528A1 (en) * 2020-12-30 2023-11-08 Faccin S.p.A. Bending machine and method for bending a metal sheet using said bending machine

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Also Published As

Publication number Publication date
FR2876927B1 (en) 2008-05-16
JP2008517767A (en) 2008-05-29
EP1804981B1 (en) 2008-05-28
US20080047316A1 (en) 2008-02-28
ES2319217T3 (en) 2009-05-05
US8061172B2 (en) 2011-11-22
FR2876927A1 (en) 2006-04-28
DE602005007261D1 (en) 2008-07-10
CN101048241A (en) 2007-10-03
ATE396798T1 (en) 2008-06-15
WO2006045942A1 (en) 2006-05-04

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