EP2274118A1 - Circular rolling mill with shaping roller - Google Patents

Circular rolling mill with shaping roller

Info

Publication number
EP2274118A1
EP2274118A1 EP09731268A EP09731268A EP2274118A1 EP 2274118 A1 EP2274118 A1 EP 2274118A1 EP 09731268 A EP09731268 A EP 09731268A EP 09731268 A EP09731268 A EP 09731268A EP 2274118 A1 EP2274118 A1 EP 2274118A1
Authority
EP
European Patent Office
Prior art keywords
rolling mill
pinion
axis
support
frame
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
EP09731268A
Other languages
German (de)
French (fr)
Other versions
EP2274118B1 (en
Inventor
Guy Vinzant
Alain Kaczorek
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2274118A1 publication Critical patent/EP2274118A1/en
Application granted granted Critical
Publication of EP2274118B1 publication Critical patent/EP2274118B1/en
Active 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
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length

Definitions

  • the invention relates to a circular rolling mill for forming annular pieces, such as forged wheel or pulley blanks or the like. It is known, for example from FR-A-2 014 080, to use a four-roll circular rolling mill for the shaping of annular pieces. Two cylindrical rollers are used to shape the outer and inner radial faces of the annular piece, respectively, while a pair of tapered rollers is used to shape the end faces of the workpiece. Electric motors are used to rotate at least some of these rollers. These rollers must be moved relative to each other, in order to take into account the dimensional variations of the part during its rolling and in order to exert the efforts of conformation of its internal, external or frontal faces.
  • the invention provides more particularly to provide a circular rolling mill whose operation is reliable and whose maintenance can be lightened without harming the quality of the rolling obtained or the strength of the rolling mill.
  • the invention relates to a circular rolling mill for the conformation of annular pieces, this rolling mill comprising a pair of rollers, respectively internal and external, capable of shaping the radial inner and outer faces of a workpiece, as well as a pair tapered rollers, respectively upper and lower, able to shape the front faces of this piece.
  • This mill also comprises means for moving at least some of these rollers relative to a frame.
  • This rolling mill is characterized in that the means for moving at least one of the rolls comprise at least a pinion and at least one rack integral with a member for moving the roller, in that the pinion is rotated by the output shaft of an electric geared motor mounted on a support articulated with respect to the frame around the axis of rotation of the pinion and in that damping means are provided to damp the pivoting of the support about its hinge axis.
  • the transmission of effort between the electric gear motor and the shaping roll or conformation roll is obtained reliably, including under heavy load, thanks to the use of a pinion type connection / rack.
  • the fact that the geared motor is mounted on a hinged support relative to the frame of the rolling mill allows that, in case of irregularity of the surface with which the roller interacts, the transient overload transmitted to the rack because of this irregularity can be reported without damage to the pinion, while it tends to rotate in a direction opposite to that normally imposed by the geared motor.
  • the damping means allow to absorb the corresponding energy, without too much stress of the motor-reducer.
  • such a rolling mill may incorporate one or more of the following characteristics:
  • the upper conical roller is mounted on a carriage movable in a vertical direction and on which is fixed the rack, the pinion / rack assembly being adapted to exert on the carriage a vertical force directed towards the lower conical roller, allowing a effective conformation of the front faces of the workpiece.
  • the inner roller is mounted on a carriage movable in a horizontal direction and on which is fixed the rack, the pinion / rack assembly being adapted to exert on the carriage a horizontal force directed towards the outer cylindrical roller, which allows to conform effectively the inner and outer faces of the workpiece.
  • the carriage which supports the roller carries at least two racks each engaged with a pinion, each pinion being rotated by the output shaft of an electric geared motor mounted on an independent support articulated on the frame about the axis of rotation of the pinion, in that the axes of rotation of the pinions are parallel to each other, while damping means of the pivoting of each support are provided.
  • the fact that the carriage carries two racks distributes the forces transmitted between the geared motors and the roller, balancing them.
  • the rolling mill also comprises at least one roller for tracking and centering the outer radial surface of the workpiece, while each centering roller is mounted on a movable arm secured to a first gear engaged with a second gear, that the second pinion is driven by the output shaft of an electric gear motor mounted on a support hinged relative to the frame about an axis parallel to the axis of rotation of the pinion and damping means are provided between the support and the frame to damp the pivoting of the support around its axis of articulation.
  • the displacement of the tracking rollers is obtained in a manner comparable to the displacement of the conformation rollers.
  • the rolling mill comprises means for detecting the pivoting of the support relative to the frame, these means being able to provide an electronic control unit of the rolling mill a signal representative of this pivoting. Taking this signal into account makes it possible to adapt the operation of the rolling mill, in particular the speed of rotation of the roller (s) concerned, to take account of a surface irregularity resulting in the pivoting of the rolling mill. support.
  • the electronic unit can drive two geared motors according to the signals received from the detection means so as to ensure a coordinated operation of the displacement means of at least one of the rollers.
  • the damping means comprises a rod connected to the support and secured to a movable piston within a body itself secured to the frame, defining a variable volume chamber which contains an elastically deformable member by compression.
  • the detection means are advantageously able to detect a displacement of the rod relative to the body.
  • the elastically deformable member disposed in the variable volume chamber is a stack of Belleville washers.
  • FIG. 2 is a side view of the rolling mill of Figure 1 when it is being rolling an annular flange;
  • FIG. 3 is a larger scale section along the line III-III in Figure 2 of the upper part of the mill which is shown in the configuration of Figure 1, that is to say empty;
  • FIG. 4 is an enlarged view of detail IV in FIG. 3;
  • FIG. 5 is a side view, in the same direction as FIG. 2, of certain drive elements for moving parts of the rolling mill of FIGS.
  • FIG. 6 is a perspective view, at an angle opposite that of FIG. 5, of the upper part of the axial cage visible in FIG. 5;
  • FIG. 7 is a top view of the rolling mill of Figures 1 to 6; and - Figure 8 is a section along the line VIII-VIII in Figure 2 and
  • Figure 9 is a perspective view similar to Figure 1, at another angle.
  • the rolling mill 1 shown in Figures 1 to 7 comprises a main frame 2 on which is mounted a radial cage 3 fixed relative to the frame 2 and an axial cage 4 movable parallel to a longitudinal axis X 2 of the frame 2.
  • the cage 3 carries a circular cylindrical roller 10 rotatably mounted around a vertical axis Zi 0 and rotated by a main electric motor 11.
  • the cage 3 also carries a secondary roller or mandrel 12 mounted to rotate about an axis Z 12 parallel to the axis Z 10 inside a movable column 13, with respect to a main part 31 of the cage 3, parallel to the axis X 2 .
  • the column 13 is supported by two bars 14 and 15 capable of sliding by Part 31, as can be seen from the following explanations.
  • the cage 3 also comprises a plate 16 which defines a housing 17 for receiving the lower end of the mandrel 12 when the column 13 and the plate 16 are aligned vertically, that is to say when the axis Zi 2 passes through the center of the housing 17. It is then possible to lower the mandrel 12 to engage partially in the housing 17.
  • the plate 16 is supported by two bars 18 and 19 which extend parallel to the bars 14 and 15 and to the axis X 2 .
  • the mill 1 also comprises a lower conical roller 20 supported by the axial cage 4 and driven in rotation by an electric motor 21.
  • the cage 4 also supports an upper conical roller 22 rotated by an electric motor 23.
  • the roll 20 is supported by the frame 41 of the axial cage 4 with its axis A 20 fixed with respect to this frame.
  • the roller 20 can only rotate about the axis A 20 .
  • the roller 22 is supported relative to the frame 41 with a possibility of displacement in vertical translation, parallel to the axes Z 10 and Z 12 , as represented by the double arrow F 3 in FIG. 2.
  • This possibility of vertical displacement of the axis A 22 allows the roller 22 to exert on the upper end face 103 of the part 100 a force F 4 directed towards the roller 20. This has the effect of inducing a reaction force F 5 of the roller
  • the roller 22 is mounted on a carriage 24 equipped with two racks 25 and 26 arranged vertically, that is to say parallel to the direction of the double arrow F 3 .
  • the carriage 24 is slidably mounted relative to bars 42 forming the armature of the frame 41 and which are visible in FIGS. 5 and 6 where the covering of the frame 41 is not shown. Note in these figures that the carriage 24 actually carries four racks, namely two racks 25 and 26 disposed on the carriage 24 substantially above the roller 22 and two racks 27 and 28 located on the other side of the frame 41 by report to the roll 22.
  • Two pinions 51 and 52 are mounted on a shaft 53 which extends parallel to the axis X2.
  • the pinions 51 and 52 are respectively engaged with the racks 25 and 27.
  • the shaft 53 constitutes the output shaft of a geared motor 61 consisting of an electric motor 62 and a reversible gear 63 connected by a Angle gear 64 to 90 °.
  • two pinions 54 and 55 are mounted on a shaft 56 and are respectively engaged with the teeth 26 and 28.
  • the shaft 56 constitutes the output shaft of a geared motor 66 comprising an electric motor 67 , a reversible reducer 68 and an angle gear 69 at 90 °.
  • each geared motor 61 or 66 supports the engine and associated bevel gear.
  • the gearbox 63 is mounted on a reaction arm 71 hinged to the frame 41 about the longitudinal axis X 53 of the shaft 53, which forms the axis of rotation of the gears 51 and 52 and which is parallel to the axis X 2 in the same manner, the gear 68 is mounted on a torque arm 72 forming a support and hinged to the frame 41 about the longitudinal axis X 56 of the shaft 56 which forms the axis of rotation of the pinions 54 and 55 and which is parallel to the axes X 53 and X 2 .
  • the geared motors 61 and 66 are supported by the arms 71 and 72 respectively through the gearboxes 63 and 68.
  • the arm or support 71 is connected by a connecting rod 73 to a shock absorber 74.
  • the articulated support 72 is connected by a connecting rod 75 to a shock absorber 76.
  • the dampers 74 and 76 are mounted head-to-tail and fixed in the upper part of the frame 41, generally in a horizontal direction perpendicular to the axis X2.
  • the various electric motors of the rolling mill 1 are controlled by an electronic unit 200 shown schematically only in FIG. 2 and connected to the mill 1 by a cable bundle 201.
  • the unit 200 coordinates the movements of the various geared motors of the rolling mill 1 , for example geared motors 61 and 66, for ensuring the effective vertical translation of the carriage 24.
  • the various motors and geared motors are controlled by the unit 200 according to a pre-established rolling range. This has the effect of exerting, on the surfaces 101 to 104 of the part 100 to be treated and by means of the conformation rollers 10, 12, 20 and 22, the conformational forces F 1 , F 2 , F 4 and F 5 .
  • the rotation of the shafts 53 and 56 by the geared motors 61 and 66 makes it possible to exert on the carriage 24 a vertical force F10, parallel to the axes Z10 and Zi 2 , which is transmitted to the roller 22 to create the F 4 force and, by reaction of the roller 20, the force F 5 on the faces 103 and 104.
  • the faces 103 and 104 are normally flat and regular. It is possible, however, that these surfaces have a protruding irregularity, especially following a stoppage of the rolling mill.
  • the height of the part 100 between the rollers 20 and 22 can increase sharply. This tends to raise the carriage 24 relative to the frame 41, inducing, by a corresponding movement of the racks 25 to 28, a rotational movement of the gears 51, 52, 54 and 55 in a direction opposite to the torque exerted by the motorcycle
  • the inverted rotation movement of the pinions is transmitted to the shafts 53 and 56.
  • the damper 74 comprises a rod 81 secured to a piston 82 mounted within a body 83 common to the two dampers 74 and 76.
  • the rod 73 is articulated on the rod 81, so that the pivoting of the reaction arm 71 about the X axis 53 relative to the frame 41 has the effect of moving the piston 82 inside the body 83, to the left in FIG. points of articulation of the connecting rod 73 on the arm 71, on the one hand, and on the rod 81, on the other hand, are defined so that the pivoting movement of the arm 71 about the axis X53, which in the direction of the arrow F 6 in FIGS.
  • two Belleville washers 87 are also arranged, which make it possible to damp the return of the arm 71 towards its normal position when the counterforce, due to the unevenness of the surface 100, is supported by geared motors 61 and 66.
  • a motion detector 91 which is shown only in FIG. 4 for the sake of clarity, is associated with the damper 74 and connected to a folded sheet 92 fixed to the rod 81 and whose movement is processed by the detector 91 to transmit a corresponding signal Si, towards the unit 200.
  • the signal Si is transmitted to the unit 200 which can be programmed to slow down then the speed of rotation of the rollers 10, 12, 20 and 22 until the return of the arms 71 to its normal position which is also dictated by the 91.
  • the shape of the detector 91 and the plate 92 shown in Figure 4 is very schematic.
  • any type of suitable detector can be used in conjunction with the damper 74, for example a detector with measuring ruler, a potentiometer detector or a Hall effect detector.
  • the damper 76 has a structure similar to that of the damper 74 and is not described in more detail. It is also associated with an unrepresented displacement sensor.
  • the mode of controlling the vertical displacement of the roller 22 is also implemented for the horizontal displacement of the mandrel or inner roller 12.
  • the bars 14, 15, 18 and 19 are each equipped with a rack.
  • the rack 125 of the rod 18 is engaged with a pinion 151 mounted on the output shaft 153 of a geared motor 161 comprising an electric motor 162 and a reducer 163.
  • a geared motor 161 comprising an electric motor 162 and a reducer 163.
  • Xi 53 the longitudinal axis of the shaft 153 which forms the axis of rotation of the pinion 151.
  • the geared motor 161 is mounted on a reaction arm 171 articulated on the main part 31 of the cage 3, around
  • the rack 127 of the bar 14 is visible in Figure 8, and the pinion 154 associated with this rack.
  • the pinion 154 is driven by a geared motor 166 which 156 is noted the output shaft.
  • the longitudinal axis Xi 56 of the shaft 156 forms the axis of rotation of the pinion 154.
  • the geared motor 166 is mounted on a reaction arm 172 hinged about the portion 31 about the axis Xi 56 which is vertical.
  • the reaction arms 171 and 172 are respectively associated with dampers 174 and 176.
  • the bars 15 and 19 are also equipped with racks, respectively 127 'and 125', each engaged with a pinion 154 'and 151'.
  • These pinions are each driven by a geared motor 161 'or 166' supported by a reaction arm 171 ', 172' articulated on the main part 31 of the cage 3 around a longitudinal axis X 153 ', Xi 56 ' of the output shaft 153 'or 156' of these geared motors which form the axes of rotation of the gears 151 'and 154'.
  • the unit 200 coordinates the operation of the geared motors 161, 161 ', 166 and 166' to ensure the effective horizontal translation of the carriage formed of the subassemblies 13 to 19.
  • the geared motors 161, 161 ', 166 and 166' make it possible to exert, on the bars 14, 15, 18 and 19 of the carriage constituted by the elements 13 to 19, a force directed towards the roll 10, that is to say opposite the cage 4, and equal to the sum of the tensile forces Ti and T 2 .
  • This tensile force tends to bring the mandrel 12 of the roll 10 in translation parallel to the axis X 2 , which makes it possible to exert the shaping forces F 1 and F 2 on the faces 101 and 102 of the piece 100.
  • the mandrel 12, the column 13 and the plate 16 can be pushed temporarily towards the central axis
  • this pivoting movement of the reaction arms 171, 171 ', 172 and 172' makes it possible to absorb the antagonistic pairs which are exerted on the shafts 153, 153 ', 156 and 156 for driving sprockets 151, 151 ', 154 and 154'.
  • the rolling mill 1 is also provided with centering arms 200 and 202 each equipped with a roller 220 or 222 intended to bear against the surface 101 of the part 100 during rolling.
  • the elements 200 and 220 are not shown in Figure 2, for clarity of the drawing.
  • the centering arm 200 is moved towards the central axis Z100 of the part 100 during rolling by means of an electric gear motor 261 whose output shaft 253 is equipped with a pinion 251 which meshes with another pinion 281, fixed on the arm 200.
  • a geared motor 266 has its output shaft 256 equipped with a pinion 254 which meshes with a second pinion 284 fixed on the arm 202.
  • Each geared motor 261 or 266 is mounted on a support 271 or 272 in the form of hinged reaction arm part 31 about the longitudinal axis X 25 X 25 3 or 6 of the output shaft 253 or 256 corresponding to This geared motor.
  • Shocks 274 and 276 similar to those mentioned for the control of the vertical position of the roller 22, are used to damp the pivoting movements of the reaction arms 271 and 272 about their respective hinge axes. These pivoting movements may result from irregularities in the surface 101 and are absorbed without damage to the gears 251, 281, 254 and 284 and the geared motors 261 and 266.
  • dampers 74, 76, 174, 174 ', 176, 176', 274 and 276 used to absorb the energy due to the pivoting of the different reaction arms are identical. . This is not required, however.
  • the pivoting of the reaction arms 171, 171 ', 172, 172', 271 and 272 can be detected, as explained about the pivoting of the reaction arms 71 and 72.
  • the detection of the pivoting of the arms 171, 171 ', 172, 172 ', 271 and 272 can be used, as explained with reference to the detector 91, to signal a surface irregularity to the unit 200 which can then adapt the operation of the mill 1.
  • a detector of the type of the detector 91 is associated with each arm 171, 171 ', 172, 172', 271 and 272. It can be provided that, when the pivoting of one of the reaction arms has been detected by the one of the detectors, the speed of rotation of the rollers 10, 12, 20 and 22 is decreased, until the return of this reaction arm to normal position, which is also detected by the detector in question.
  • the unit 200 can control the geared motors which cooperate to drive the same roll in a coordinated manner. For example, when the detector 91 associated with the damper 74 has detected a pivoting of the arm
  • the unit 200 is informed by the signal Si. Taking account of this signal, the unit 200 can control the geared motor 66 so that it actuates the shaft 56 so as to compensate, at the pinions 54 and 55 and the racks 26 and 28, the angular offset that occurred around the axis
  • the unit 200 can drive geared motors other than that supported by the reaction arm whose pivoting has been detected to compensate for the possible imbalance in the drive of the column 13 or the plate 16. This ensures that the mandrel 12 and housing 17 are permanently correctly aligned and that the carriage 13-19 is not subject to efforts that could distort it. This coordination of the action of the geared motors is possible because the articulated reaction arms and the associated detectors rapidly detect the irregularities of the part to be treated.
  • each of the carriages 13-19 or 24 of displacement in horizontal or vertical translation of the rollers 12 or 22 carries four racks 25 to 28, 125, 127 or equivalent which each cooperate with a pinion 51, 52, 54 , 55, 151 or equivalent.
  • the invention has been shown in its implementation for the control of the position of the conformation rollers 12 and 22. It can be implemented only for the control of only one of these conformation rollers. Similarly, its implementation for the control of the centering arms 200 and 202 is optional.
  • the cage 4 is equipped with a gear motor 461 which drives a pinion
  • the geared motor 461 is supported by a reaction arm 471 hinged to the frame 41 of the cage 4 about an axis parallel to the output axis of the gear motor 461.
  • damping means constituted by piston dampers and stacking Belleville washers.
  • Other types of dampers are conceivable, such as compression coil spring dampers, gas dampers or dampers with elastomer block.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)
  • Transmission Devices (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)

Abstract

This circular rolling mill (1), used for shaping annular workpieces (100), comprises a pair of rollers, an inner one (12) and an outer one (10), capable of working (F1+F2) the radial inner (102) and outer (101) faces of a workpiece, and a pair of conical rollers, an upper one (22) and a lower one (20), capable of working (F4+F5) the front faces (103, 104) of the workpiece, and also means (66) for moving some of these rollers (22) with respect to a frame (41) of the rolling mill (1). The means for moving at least one of the rollers (22) comprise at least one pinion (54, 55) and at least one rack (26, 28) which is secured to a member for the movement (F3) of the roller. This pinion (54, 55) is rotated by the output shaft of an electrically operated geared motor (66) mounted on a support (72) which is articulated with respect to the frame about the axis (X56) parallel to the axis of rotation of the pinion. Damping means (76) are provided for damping the pivoting movement of the support (72) about its articular axis (X56).

Description

LAMINOIR CIRCULAIRE AVEC ROULEAU DE CONFORMATION CIRCULAR LAMINATOR WITH CONFORMATION ROLL
L'invention a trait à un laminoir circulaire utilisé pour la conformation de pièces annulaires, telles que des ébauches de poulie ou de roue en métal forgé ou d'autres pièces similaires. II est connu, par exemple de FR-A-2 014 080 d'utiliser un laminoir circulaire à quatre rouleaux pour la conformation de pièces annulaires. Deux rouleaux cylindriques sont utilisés pour façonner respectivement les faces radiales externe et interne de la pièce annulaire, alors qu'une paire de rouleaux coniques est utilisée pour façonner les faces frontales de la pièce. Des moteurs électriques sont utilisés pour entraîner en rotation certains au moins de ces rouleaux. Ces rouleaux doivent être déplacés les uns par rapport aux autres, ceci afin de tenir compte des variations dimensionnelles de la pièce au cours de son laminage et afin d'exercer les efforts de conformation de ses faces internes, externes ou frontales. Pour ce faire, on utilise des vérins hydrauliques qui permettent de développer des efforts importants sur des courses d'amplitude relativement faibles. L'utilisation de tels vérins impose de maintenir en fonctionnement une centrale hydraulique et de piloter des distributeurs de répartition de l'huile d'actionnement des vérins. Ceci nécessite des vérifications périodiques et des opérations de maintenance relativement complexes. Les fuites d'huile ne peuvent pas être exclues, ce qui induit des risques d'incendie.The invention relates to a circular rolling mill for forming annular pieces, such as forged wheel or pulley blanks or the like. It is known, for example from FR-A-2 014 080, to use a four-roll circular rolling mill for the shaping of annular pieces. Two cylindrical rollers are used to shape the outer and inner radial faces of the annular piece, respectively, while a pair of tapered rollers is used to shape the end faces of the workpiece. Electric motors are used to rotate at least some of these rollers. These rollers must be moved relative to each other, in order to take into account the dimensional variations of the part during its rolling and in order to exert the efforts of conformation of its internal, external or frontal faces. To do this, we use hydraulic cylinders that allow to develop significant efforts on relatively small amplitude strokes. The use of such cylinders requires the maintenance of a hydraulic power plant and control distributors distributing the oil actuating cylinders. This requires periodic checks and relatively complex maintenance operations. Oil leaks can not be excluded, which leads to fire hazards.
C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention proposant un laminoir circulaire dont le fonctionnement est fiabilisé et dont la maintenance peut être allégée, sans nuire à la qualité du laminage obtenu ni à la robustesse du laminoir. A cet effet, l'invention concerne un laminoir circulaire pour la conformation de pièces annulaires, ce laminoir comprenant une paire de rouleaux, respectivement interne et externe, aptes à façonner les faces radiales interne et externe d'une pièce, ainsi qu'une paire de rouleaux coniques, respectivement supérieur et inférieur, aptes à façonner les faces frontales de cette pièce. Ce laminoir comprend également des moyens de déplacement de certains au moins de ces rouleaux par rapport à un châssis. Ce laminoir est caractérisé en ce que les moyens de déplacement d'au moins un des rouleaux comprennent au moins un pignon et au moins une crémaillère solidaire d'un organe de déplacement du rouleau, en ce que le pignon est entraîné en rotation par l'arbre de sortie d'un moto-réducteur électrique monté sur un support articulé par rapport au châssis autour de l'axe de rotation du pignon et en ce que des moyens d'amortissement sont prévus pour amortir le pivotement du support autour de son axe d'articulation.It is these drawbacks that the invention provides more particularly to provide a circular rolling mill whose operation is reliable and whose maintenance can be lightened without harming the quality of the rolling obtained or the strength of the rolling mill. For this purpose, the invention relates to a circular rolling mill for the conformation of annular pieces, this rolling mill comprising a pair of rollers, respectively internal and external, capable of shaping the radial inner and outer faces of a workpiece, as well as a pair tapered rollers, respectively upper and lower, able to shape the front faces of this piece. This mill also comprises means for moving at least some of these rollers relative to a frame. This rolling mill is characterized in that the means for moving at least one of the rolls comprise at least a pinion and at least one rack integral with a member for moving the roller, in that the pinion is rotated by the output shaft of an electric geared motor mounted on a support articulated with respect to the frame around the axis of rotation of the pinion and in that damping means are provided to damp the pivoting of the support about its hinge axis.
Grâce à l'invention, la transmission d'effort entre le moto-réducteur électrique et le rouleau de façonnage ou de conformation est obtenue de façon fiable, y compris sous forte charge, grâce à l'utilisation d'une liaison de type pignon/crémaillère. En outre, le fait que le moto-réducteur est monté sur un support articulé par rapport au châssis du laminoir permet que, en cas d'irrégularité de la surface avec laquelle interagit le rouleau, la surcharge transitoire transmise à la crémaillère du fait de cette irrégularité peut être reportée sans dommage vers le pignon, alors que celui-ci tend à tourner dans un sens opposé à celui normalement imposé par le moto-réducteur. Il en résulte un couple résistant important au niveau du pignon, ce couple pouvant être absorbé du fait du pivotement du support autour de l'axe de rotation du pignon et par rapport au châssis du laminoir. Les moyens d'amortissement permettent d'absorber l'énergie correspondante, sans sollicitation trop importante du moto-réduteur.Thanks to the invention, the transmission of effort between the electric gear motor and the shaping roll or conformation roll is obtained reliably, including under heavy load, thanks to the use of a pinion type connection / rack. In addition, the fact that the geared motor is mounted on a hinged support relative to the frame of the rolling mill allows that, in case of irregularity of the surface with which the roller interacts, the transient overload transmitted to the rack because of this irregularity can be reported without damage to the pinion, while it tends to rotate in a direction opposite to that normally imposed by the geared motor. This results in a significant resisting torque at the pinion, this torque being absorbed due to the pivoting of the support around the axis of rotation of the pinion and relative to the frame of the rolling mill. The damping means allow to absorb the corresponding energy, without too much stress of the motor-reducer.
Selon des aspects avantageux mais non obligatoires de l'invention, un tel laminoir peut incorporer une ou plusieurs des caractéristiques suivantes :According to advantageous but non-obligatory aspects of the invention, such a rolling mill may incorporate one or more of the following characteristics:
- Le rouleau conique supérieur est monté sur un chariot déplaçable selon une direction verticale et sur lequel est fixée la crémaillère, l'ensemble pignon/crémaillère étant apte à exercer sur le chariot un effort vertical dirigé vers le rouleau conique inférieur, ce qui permet une conformation efficace des faces frontales de la pièce à traiter.- The upper conical roller is mounted on a carriage movable in a vertical direction and on which is fixed the rack, the pinion / rack assembly being adapted to exert on the carriage a vertical force directed towards the lower conical roller, allowing a effective conformation of the front faces of the workpiece.
- Le rouleau interne est monté sur un chariot déplaçable selon une direction horizontale et sur lequel est fixée la crémaillère, l'ensemble pignon/crémaillère étant apte à exercer sur le chariot un effort horizontal dirigé vers le rouleau cylindrique externe, ce qui permet de conformer efficacement les faces interne et externe de la pièce à traiter.- The inner roller is mounted on a carriage movable in a horizontal direction and on which is fixed the rack, the pinion / rack assembly being adapted to exert on the carriage a horizontal force directed towards the outer cylindrical roller, which allows to conform effectively the inner and outer faces of the workpiece.
- Le chariot qui supporte le rouleau porte au moins deux crémaillères en prise chacune avec un pignon, chaque pignon étant entraîné en rotation par l'arbre de sortie d'un moto-réducteur électrique monté sur un support indépendant articulé sur le châssis autour de l'axe de rotation du pignon, en ce que les axes de rotation des pignons sont parallèles entre eux, alors que des moyens d'amortissement du pivotement de chaque support sont prévus. Le fait que le chariot porte deux crémaillères permet de répartir les efforts transmis entre les moto-réducteurs et le rouleau, en équilibrant ceux-ci.- The carriage which supports the roller carries at least two racks each engaged with a pinion, each pinion being rotated by the output shaft of an electric geared motor mounted on an independent support articulated on the frame about the axis of rotation of the pinion, in that the axes of rotation of the pinions are parallel to each other, while damping means of the pivoting of each support are provided. The fact that the carriage carries two racks distributes the forces transmitted between the geared motors and the roller, balancing them.
- Le laminoir comprend également au moins un rouleau de suivi et de centrage de la surface radiale externe de la pièce à traiter, alors que chaque rouleau de centrage est monté sur un bras mobile solidaire d'un premier pignon en prise avec un deuxième pignon, que le deuxième pignon est entraîné par l'arbre de sortie d'un moto-réducteur électrique monté sur un support articulé par rapport au châssis autour d'un axe parallèle à l'axe de rotation du pignon et que des moyens d'amortissement sont prévus entre le support et le châssis pour amortir le pivotement du support autour de son axe d'articulation. En d'autres termes, le déplacement des rouleaux de suivi est obtenu d'une façon comparable au déplacement des rouleaux de conformation.- The rolling mill also comprises at least one roller for tracking and centering the outer radial surface of the workpiece, while each centering roller is mounted on a movable arm secured to a first gear engaged with a second gear, that the second pinion is driven by the output shaft of an electric gear motor mounted on a support hinged relative to the frame about an axis parallel to the axis of rotation of the pinion and damping means are provided between the support and the frame to damp the pivoting of the support around its axis of articulation. In other words, the displacement of the tracking rollers is obtained in a manner comparable to the displacement of the conformation rollers.
- Le laminoir comprend des moyens de détection du pivotement du support par rapport au châssis, ces moyens étant aptes à fournir à une unité électronique de commande du laminoir un signal représentatif de ce pivotement. La prise en compte de ce signal permet d'adapter le fonctionnement du laminoir, notamment la vitesse d'entraînement en rotation du ou des rouleau(x) concerné(s), pour tenir compte d'une irrégularité de surface résultant dans le pivotement du support. Dans ce cas, on peut prévoir que l'unité électronique peut piloter deux moto-réducteurs en fonction des signaux reçus des moyens de détection de façon à assurer un fonctionnement coordonné des moyens de déplacement d'au moins un des rouleaux.- The rolling mill comprises means for detecting the pivoting of the support relative to the frame, these means being able to provide an electronic control unit of the rolling mill a signal representative of this pivoting. Taking this signal into account makes it possible to adapt the operation of the rolling mill, in particular the speed of rotation of the roller (s) concerned, to take account of a surface irregularity resulting in the pivoting of the rolling mill. support. In this case, it can be provided that the electronic unit can drive two geared motors according to the signals received from the detection means so as to ensure a coordinated operation of the displacement means of at least one of the rollers.
- Les moyens d'amortissement comprennent une tige reliée au support et solidaire d'un piston mobile à l'intérieur d'un corps lui-même solidaire du châssis, en définissant une chambre de volume variable qui contient un organe élastiquement déformable par compression. Dans ce cas, les moyens de détection sont avantageusement aptes à détecter un déplacement de la tige par rapport au corps. On peut, en outre, prévoir que l'organe élastiquement déformable disposé dans la chambre de volume variable est un empilement de rondelles Belleville. L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre d'un mode de réalisation d'un laminoir conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels : - la figure 1 est une représentation en perspective d'un laminoir conforme à l'invention ;- The damping means comprises a rod connected to the support and secured to a movable piston within a body itself secured to the frame, defining a variable volume chamber which contains an elastically deformable member by compression. In this case, the detection means are advantageously able to detect a displacement of the rod relative to the body. It can further be provided that the elastically deformable member disposed in the variable volume chamber is a stack of Belleville washers. The invention will be better understood and other advantages thereof will emerge more clearly in the light of the following description of an embodiment of a rolling mill in accordance with its principle, given solely by way of example and with reference to the accompanying drawings in which: - Figure 1 is a perspective representation of a rolling mill according to the invention;
- la figure 2 est une vue de côté du laminoir de la figure 1 lorsque celui-ci est en cours de laminage d'une bride annulaire ;- Figure 2 is a side view of the rolling mill of Figure 1 when it is being rolling an annular flange;
- la figure 3 est une coupe à plus grande échelle selon la ligne Ill-lll à la figure 2 de la partie supérieure du laminoir qui est représenté dans la configuration de la figure 1 , c'est-à-dire à vide ;- Figure 3 is a larger scale section along the line III-III in Figure 2 of the upper part of the mill which is shown in the configuration of Figure 1, that is to say empty;
- la figure 4 est une vue à plus grande échelle du détail IV à la figure 3 ;FIG. 4 is an enlarged view of detail IV in FIG. 3;
- la figure 5 est une vue de côté, dans le même sens que la figure 2, de certains éléments d'entraînement de parties mobiles du laminoir des figures 1 àFIG. 5 is a side view, in the same direction as FIG. 2, of certain drive elements for moving parts of the rolling mill of FIGS.
4 ;4;
- la figure 6 est une vue en perspective, selon un angle opposé à celui de la figure 5, de la partie supérieure de la cage axiale visible à la figure 5 ;FIG. 6 is a perspective view, at an angle opposite that of FIG. 5, of the upper part of the axial cage visible in FIG. 5;
- la figure 7 est une vue de dessus du laminoir des figures 1 à 6 ; et - la figure 8 est une coupe selon la ligne VIII-VIII à la figure 2 et- Figure 7 is a top view of the rolling mill of Figures 1 to 6; and - Figure 8 is a section along the line VIII-VIII in Figure 2 and
- la figure 9 est une vue en perspective analogue à la figure 1 , selon un autre angle.- Figure 9 is a perspective view similar to Figure 1, at another angle.
Le laminoir 1 représenté sur les figures 1 à 7 comprend un châssis principal 2 sur lequel est montée une cage radiale 3 fixe par rapport au châssis 2 ainsi qu'une cage axiale 4 mobile parallèlement à un axe longitudinal X2 du châssis 2.The rolling mill 1 shown in Figures 1 to 7 comprises a main frame 2 on which is mounted a radial cage 3 fixed relative to the frame 2 and an axial cage 4 movable parallel to a longitudinal axis X 2 of the frame 2.
La cage 3 porte un rouleau 10 cylindrique à base circulaire monté tournant autour d'un axe vertical Zi0 et entraîné en rotation par un moteur électrique principal 11. La cage 3 porte également un rouleau secondaire ou mandrin 12 monté tournant autour d'un axe Z12 parallèle à l'axe Z10 à l'intérieur d'une colonne 13 mobile, par rapport à une partie principale 31 de la cage 3, parallèlement à l'axe X2. La colonne 13 est supportée par deux barres 14 et 15 aptes à coulisser par rapport à la partie 31 , ainsi qu'il ressort des explications qui suivent. La cage 3 comprend également un plateau 16 qui définit un logement 17 de réception de l'extrémité inférieure du mandrin 12 lorsque la colonne 13 et le plateau 16 sont alignés verticalement, c'est-à-dire lorsque l'axe Zi2 passe par le centre du logement 17. Il est alors en effet possible d'abaisser le mandrin 12 pour l'engager partiellement dans le logement 17.The cage 3 carries a circular cylindrical roller 10 rotatably mounted around a vertical axis Zi 0 and rotated by a main electric motor 11. The cage 3 also carries a secondary roller or mandrel 12 mounted to rotate about an axis Z 12 parallel to the axis Z 10 inside a movable column 13, with respect to a main part 31 of the cage 3, parallel to the axis X 2 . The column 13 is supported by two bars 14 and 15 capable of sliding by Part 31, as can be seen from the following explanations. The cage 3 also comprises a plate 16 which defines a housing 17 for receiving the lower end of the mandrel 12 when the column 13 and the plate 16 are aligned vertically, that is to say when the axis Zi 2 passes through the center of the housing 17. It is then possible to lower the mandrel 12 to engage partially in the housing 17.
Le plateau 16 est supporté par deux barres 18 et 19 qui s'étendent parallèlement aux barres 14 et 15 et à l'axe X2.The plate 16 is supported by two bars 18 and 19 which extend parallel to the bars 14 and 15 and to the axis X 2 .
Le laminoir 1 comprend également un rouleau conique inférieur 20 supporté par la cage axiale 4 et entraîné en rotation par un moteur électrique 21. La cage 4 supporte également un rouleau conique supérieur 22 entraîné en rotation par un moteur électrique 23.The mill 1 also comprises a lower conical roller 20 supported by the axial cage 4 and driven in rotation by an electric motor 21. The cage 4 also supports an upper conical roller 22 rotated by an electric motor 23.
On note respectivement A20 et A22 les axes de symétrie et de rotation des rouleaux 20 et 21. Ces axes sont convergents et se rapprochent en direction de la cage radiale 3.Respectively denote A 20 and A 22 the axes of symmetry and rotation of the rollers 20 and 21. These axes are convergent and closer toward the radial cage 3.
Lorsqu'une pièce à laminer 100 est en place dans le laminoir 1 , comme représenté uniquement à la figure 2, cette pièce est soumise à des efforts de compression radiale F1 et F2 exercé respectivement par les rouleaux 10 et 12. Ces efforts F1 et F2 permettent de conformer respectivement la surface radiale externe 101 et la surface radiale interne 102 de la pièce 100. L'intensité de ces efforts dépend de l'intensité de deux efforts de traction T1 et T2 exercés respectivement sur la colonne 13 et sur le plateau 16 au moyen des barres 14, 15, 18 et 19 et dirigés vers la partie 31 de la cage radiale 3.When a workpiece 100 is in place in the rolling mill 1, as shown only in Figure 2, this part is subjected to radial compressive forces F 1 and F 2 exerted respectively by the rollers 10 and 12. These efforts F 1 and F 2 make it possible respectively to conform the external radial surface 101 and the internal radial surface 102 of the part 100. The intensity of these forces depends on the intensity of two tensile forces T 1 and T 2 exerted respectively on the column 13 and on the plate 16 by means of the bars 14, 15, 18 and 19 and directed towards the part 31 of the radial cage 3.
Le rouleau 20 est supporté par le châssis 41 de la cage axiale 4 avec son axe A20 fixe par rapport à ce châssis. En d'autres termes, le rouleau 20 ne peut que tourner autour de l'axe A20. Au contraire, le rouleau 22 est supporté par rapport au châssis 41 avec une possibilité de déplacement en translation verticale, parallèlement aux axes Z10 et Z12, comme représenté par la double flèche F3 à la figure 2. Cette possibilité de déplacement vertical de l'axe A22 permet au rouleau 22 d'exercer sur la face frontale supérieure 103 de la pièce 100 un effort F4 dirigé vers le rouleau 20. Ceci a pour effet d'induire un effort de réaction F5 du rouleauThe roll 20 is supported by the frame 41 of the axial cage 4 with its axis A 20 fixed with respect to this frame. In other words, the roller 20 can only rotate about the axis A 20 . On the contrary, the roller 22 is supported relative to the frame 41 with a possibility of displacement in vertical translation, parallel to the axes Z 10 and Z 12 , as represented by the double arrow F 3 in FIG. 2. This possibility of vertical displacement of the axis A 22 allows the roller 22 to exert on the upper end face 103 of the part 100 a force F 4 directed towards the roller 20. This has the effect of inducing a reaction force F 5 of the roller
20 sur la face frontale inférieure 104 de la pièce 100. Ainsi, en déplaçant plus ou moins le rouleau 22 dans le sens de la double flèche F3, il est possible d'exercer, directement sur la face 103 et indirectement sur la face 104, un effort de conformation de ces faces.20 on the lower end face 104 of the part 100. Thus, by moving more or less the roller 22 in the direction of the double arrow F 3 , it is possible to exert, directly on the face 103 and indirectly on the face 104, a conformational force of these faces.
Pour pouvoir être déplacé dans sens de la double flèche F3, le rouleau 22 est monté sur un chariot 24 équipé de deux crémaillères 25 et 26 disposées verticalement, c'est-à-dire parallèlement à la direction de la double flèche F3. Le chariot 24 est monté coulissant par rapport à des barres 42 formant l'armature du châssis 41 et qui sont visibles aux figures 5 et 6 où l'habillage du châssis 41 n'est pas représenté. On note sur ces figures que le chariot 24 porte en fait quatre crémaillères, à savoir deux crémaillères 25 et 26 disposées sur le chariot 24 sensiblement au-dessus du rouleau 22 et deux crémaillères 27 et 28 situé de l'autre côté du châssis 41 par rapport au rouleau 22.To be able to be moved in the direction of the double arrow F 3 , the roller 22 is mounted on a carriage 24 equipped with two racks 25 and 26 arranged vertically, that is to say parallel to the direction of the double arrow F 3 . The carriage 24 is slidably mounted relative to bars 42 forming the armature of the frame 41 and which are visible in FIGS. 5 and 6 where the covering of the frame 41 is not shown. Note in these figures that the carriage 24 actually carries four racks, namely two racks 25 and 26 disposed on the carriage 24 substantially above the roller 22 and two racks 27 and 28 located on the other side of the frame 41 by report to the roll 22.
Deux pignons 51 et 52 sont montés sur un arbre 53 qui s'étend parallèlement à l'axe X2. Les pignons 51 et 52 sont respectivement en prise avec les crémaillères 25 et 27. L'arbre 53 constitue l'arbre de sortie d'un moto-réducteur 61 constitué d'un moteur électrique 62 et d'un réducteur réversible 63 reliés par un renvoi d'angle 64 à 90°.Two pinions 51 and 52 are mounted on a shaft 53 which extends parallel to the axis X2. The pinions 51 and 52 are respectively engaged with the racks 25 and 27. The shaft 53 constitutes the output shaft of a geared motor 61 consisting of an electric motor 62 and a reversible gear 63 connected by a Angle gear 64 to 90 °.
De la même manière, deux pignons 54 et 55 sont montés sur un arbre 56 et sont respectivement en prise avec les dentures 26 et 28. L'arbre 56 constitue l'arbre de sortie d'un moto-réducteur 66 comprenant un moteur électrique 67, un réducteur réversible 68 et un renvoi d'angle 69 à 90°.In the same way, two pinions 54 and 55 are mounted on a shaft 56 and are respectively engaged with the teeth 26 and 28. The shaft 56 constitutes the output shaft of a geared motor 66 comprising an electric motor 67 , a reversible reducer 68 and an angle gear 69 at 90 °.
Le réducteur 63 ou 68 de chaque moto-réducteur 61 ou 66 supporte le moteur et le renvoi d'angle associés.The gearbox 63 or 68 of each geared motor 61 or 66 supports the engine and associated bevel gear.
Le réducteur 63 est monté sur un bras de réaction 71 articulé sur le châssis 41 autour de l'axe longitudinal X53 de l'arbre 53, qui forme l'axe de rotation des pignons 51 et 52 et qui est parallèle à l'axe X2 De la même manière, le réducteur 68 est monté sur un bras de réaction 72 formant support et articulé par rapport au châssis 41 autour de l'axe longitudinal X56 de l'arbre 56, qui forme l'axe de rotation des pignons 54 et 55 et qui est parallèle aux axes X53 et X2. Les moto- réducteurs 61 et 66 sont supportés par les bras 71 et 72, respectivement à travers les réducteurs 63 et 68.The gearbox 63 is mounted on a reaction arm 71 hinged to the frame 41 about the longitudinal axis X 53 of the shaft 53, which forms the axis of rotation of the gears 51 and 52 and which is parallel to the axis X 2 in the same manner, the gear 68 is mounted on a torque arm 72 forming a support and hinged to the frame 41 about the longitudinal axis X 56 of the shaft 56 which forms the axis of rotation of the pinions 54 and 55 and which is parallel to the axes X 53 and X 2 . The geared motors 61 and 66 are supported by the arms 71 and 72 respectively through the gearboxes 63 and 68.
Le bras ou support 71 est relié par une bielle en chape 73 à un amortisseur 74. De la même façon, le support articulé 72 est relié par une bielle en chape 75 à un amortisseur 76. En pratique, les amortisseurs 74 et 76 sont montés tête-bêche et fixés en partie supérieure du châssis 41 , globalement selon une direction horizontale perpendiculaire à l'axe X2.The arm or support 71 is connected by a connecting rod 73 to a shock absorber 74. In the same way, the articulated support 72 is connected by a connecting rod 75 to a shock absorber 76. In practice, the dampers 74 and 76 are mounted head-to-tail and fixed in the upper part of the frame 41, generally in a horizontal direction perpendicular to the axis X2.
Les différents moteurs électriques du laminoir 1 sont commandés par une unité électronique 200 représentée de façon schématique uniquement à la figure 2 et reliée au laminoir 1 par un faisceau de câble 201. L'unité 200 coordonne les mouvements des différents moto-réducteurs du laminoir 1 , par exemple des moto- réducteurs 61 et 66, pour assurer la translation verticale effective du chariot 24.The various electric motors of the rolling mill 1 are controlled by an electronic unit 200 shown schematically only in FIG. 2 and connected to the mill 1 by a cable bundle 201. The unit 200 coordinates the movements of the various geared motors of the rolling mill 1 , for example geared motors 61 and 66, for ensuring the effective vertical translation of the carriage 24.
En fonctionnement normal du laminoir 1 , les différents moteurs et moto- réducteurs sont commandés par l'unité 200 selon une gamme de laminage pré- établie. Ceci a pour effet d'exercer, sur les surfaces 101 à 104 de la pièce 100 à traiter et au moyen des rouleaux de conformation 10, 12, 20 et 22, les efforts de conformation F1, F2, F4 et F5. En particulier, la mise en rotation des arbres 53 et 56 par les moto-réducteurs 61 et 66 permet d'exercer sur le chariot 24 un effort vertical F10, parallèle aux axes Z10 et Zi2, qui est transmis au rouleau 22 pour créer l'effort F4 et, par réaction du rouleau 20, l'effort F5 sur les faces 103 et 104.In normal operation of the mill 1, the various motors and geared motors are controlled by the unit 200 according to a pre-established rolling range. This has the effect of exerting, on the surfaces 101 to 104 of the part 100 to be treated and by means of the conformation rollers 10, 12, 20 and 22, the conformational forces F 1 , F 2 , F 4 and F 5 . In particular, the rotation of the shafts 53 and 56 by the geared motors 61 and 66 makes it possible to exert on the carriage 24 a vertical force F10, parallel to the axes Z10 and Zi 2 , which is transmitted to the roller 22 to create the F 4 force and, by reaction of the roller 20, the force F 5 on the faces 103 and 104.
Les faces 103 et 104 sont normalement planes et régulières. Il se peut toutefois que ces surfaces présentent une irrégularité en saillie, notamment suite à un arrêt du laminoir. Dans ce cas, lorsque la pièce 100 est entraînée en rotation autour de son axe central Z1Oo, la hauteur de la pièce 100 entre les rouleaux 20 et 22 peut augmenter brutalement. Ceci tend à faire remonter le chariot 24 par rapport au châssis 41 , en induisant, par un déplacement correspondant des crémaillères 25 à 28, un mouvement de rotation des pignons 51 , 52, 54 et 55 dans un sens opposé au couple exercé par les moto-réducteurs 61 et 66. Du fait du caractère réversible des transmissions pignon/crémaillère, le mouvement de rotation inversé des pignons est transmis aux arbres 53 et 56. Ce mouvement inverse tend à faire tourner ces arbres dans un sens opposé à celui imposé par les moto-réducteurs 61 et 66. En d'autres termes, le couple transmis aux arbres 53 et 56 du fait d'une irrégularité en saillie sur l'une des surfaces 103 ou 104 est antagoniste de celui résultant l'action des moteurs 62 et 67. Il en résulte des couples opposés sur les arbres 53 et 56 et sur les arbres des réducteurs 63 et 68. Ces efforts antagonistes sont absorbés du fait du montage des moto-réducteurs 61 et 66 sur les bras de réaction 71 et 72 qui peuvent pivoter respectivement autour des axes X53 et X56. Ce mouvement de pivotement est amorti par les amortisseurs 74 et 76 qui absorbent en fait l'énergie liée à la remontée du chariot 24.The faces 103 and 104 are normally flat and regular. It is possible, however, that these surfaces have a protruding irregularity, especially following a stoppage of the rolling mill. In this case, when the part 100 is rotated about its central axis Z 10 o, the height of the part 100 between the rollers 20 and 22 can increase sharply. This tends to raise the carriage 24 relative to the frame 41, inducing, by a corresponding movement of the racks 25 to 28, a rotational movement of the gears 51, 52, 54 and 55 in a direction opposite to the torque exerted by the motorcycle As a result of the reversible nature of the pinion / rack transmissions, the inverted rotation movement of the pinions is transmitted to the shafts 53 and 56. This reverse movement tends to turn these shafts in a direction opposite to that imposed by the shafts. In other words, the torque transmitted to the shafts 53 and 56 due to an irregularity projecting from one of the surfaces 103 or 104 is antagonistic to that resulting from the action of the motors 62 and 67. This results in opposing torques on the shafts 53 and 56 and on the shafts of the gearboxes 63 and 68. These antagonistic forces are absorbed because of the mounting of the geared motors 61 and 66 on the reaction arms 71 and 72 which can pi vote respectively around the X 53 and X 56 axes. This pivoting movement is cushioned by the dampers 74 and 76 which in fact absorb the energy associated with the raising of the carriage 24.
Comme il ressort plus particulièrement de la figure 4, l'amortisseur 74 comprend une tige 81 solidaire d'un piston 82 monté à l'intérieur d'un corps 83 commun aux deux amortisseurs 74 et 76. La bielle 73 est articulée sur la tige 81 , de telle sorte que le pivotement du bras de réaction 71 autour de l'axe X53 par rapport au châssis 41 a pour effet de déplacer le piston 82 à l'intérieur du corps 83, vers la gauche sur la figure 4. Les points d'articulation de la bielle 73 sur le bras 71 , d'une part, et sur la tige 81 , d'autre part, sont définis de telle sorte que le mouvement de pivotement du bras 71 autour de l'axe X53, qui a lieu dans le sens de la flèche F6 aux figures 4 et 6, a pour effet de déplacer le piston 81 dans un sens de réduction du volume d'une chambre 84 définie à l'intérieur du corps 83 et dans laquelle est disposé un empilement 85 de rondelles Belleville. L'écrasement de l'empilement de rondelles 85 permet d'amortir le mouvement de pivotement du bras 71 dans le sens de la flèche F6.As is more particularly apparent from Figure 4, the damper 74 comprises a rod 81 secured to a piston 82 mounted within a body 83 common to the two dampers 74 and 76. The rod 73 is articulated on the rod 81, so that the pivoting of the reaction arm 71 about the X axis 53 relative to the frame 41 has the effect of moving the piston 82 inside the body 83, to the left in FIG. points of articulation of the connecting rod 73 on the arm 71, on the one hand, and on the rod 81, on the other hand, are defined so that the pivoting movement of the arm 71 about the axis X53, which in the direction of the arrow F 6 in FIGS. 4 and 6, has the effect of moving the piston 81 in a direction of reducing the volume of a chamber 84 defined inside the body 83 and in which is disposed a 85 stack of Belleville washers. The crushing of the stack of washers 85 makes it possible to damp the pivoting movement of the arm 71 in the direction of the arrow F 6 .
Dans la chambre 86 du corps 83 définie à l'opposé de la chambre 84 par rapport au piston 82, deux rondelles Belleville 87 sont également disposées, lesquelles permettent d'amortir le retour du bras 71 vers sa position normale lorsque l'effort antagoniste, dû à l'irrégularité de surface de la pièce 100, est pris en charge par les moto-réducteurs 61 et 66.In the chamber 86 of the body 83 defined opposite the chamber 84 with respect to the piston 82, two Belleville washers 87 are also arranged, which make it possible to damp the return of the arm 71 towards its normal position when the counterforce, due to the unevenness of the surface 100, is supported by geared motors 61 and 66.
Un détecteur de mouvement 91 , qui est représenté uniquement à la figure 4 pour la clarté du dessin, est associé à l'amortisseur 74 et relié à une tôle pliée 92 fixée sur la tige 81 et dont le mouvement est traité par le détecteur 91 pour émettre un signal Si correspondant, en direction de l'unité 200. Ainsi, lorsque le bras 71 pivote autour de l'axe X71 du fait d'une remontée du chariot 24 due à une irrégularité en saillie sur l'une des surfaces 103 ou 104, le signal Si est transmis à l'unité 200 qui peut être programmée pour ralentir alors la vitesse de rotation des rouleaux 10, 12, 20 et 22 jusqu'au retour des bras 71 vers sa position normale qui est également dictée par le détecteur 91. La forme du détecteur 91 et de la tôle 92 représentés à la figure 4 est très schématique. En pratique, tout type de détecteur approprié peut être utilisé en conjonction avec l'amortisseur 74, par exemple un détecteur avec règle de mesure, un détecteur à potentiomètre ou un détecteur à effet Hall. L'amortisseur 76 présente une structure analogue à celle de l'amortisseur 74 et n'est pas décrit plus en détail. Il est également associé à un détecteur de déplacement non représenté.A motion detector 91, which is shown only in FIG. 4 for the sake of clarity, is associated with the damper 74 and connected to a folded sheet 92 fixed to the rod 81 and whose movement is processed by the detector 91 to transmit a corresponding signal Si, towards the unit 200. Thus, when the arm 71 pivots about the X axis 71 due to a rise of the carriage 24 due to a projecting irregularity on one of the surfaces 103 or 104, the signal Si is transmitted to the unit 200 which can be programmed to slow down then the speed of rotation of the rollers 10, 12, 20 and 22 until the return of the arms 71 to its normal position which is also dictated by the 91. The shape of the detector 91 and the plate 92 shown in Figure 4 is very schematic. In practice, any type of suitable detector can be used in conjunction with the damper 74, for example a detector with measuring ruler, a potentiometer detector or a Hall effect detector. The damper 76 has a structure similar to that of the damper 74 and is not described in more detail. It is also associated with an unrepresented displacement sensor.
Le mode de commande du déplacement vertical du rouleau 22 est également mis en œuvre pour le déplacement horizontal du mandrin ou rouleau interne 12. En effet, les barres 14, 15, 18 et 19 sont chacune équipées d'une crémaillère. La crémaillère 125 de la barre 18 est en prise avec un pignon 151 monté sur l'arbre de sortie 153 d'un moto-réducteur 161 comprenant un moteur électrique 162 et un réducteur 163. On note Xi53 l'axe longitudinal de l'arbre 153 qui forme l'axe de rotation du pignon 151. Le moto-réducteur 161 est monté sur un bras de réaction 171 articulé sur la partie principale 31 de la cage 3, autour deThe mode of controlling the vertical displacement of the roller 22 is also implemented for the horizontal displacement of the mandrel or inner roller 12. Indeed, the bars 14, 15, 18 and 19 are each equipped with a rack. The rack 125 of the rod 18 is engaged with a pinion 151 mounted on the output shaft 153 of a geared motor 161 comprising an electric motor 162 and a reducer 163. One notes Xi 53 the longitudinal axis of the shaft 153 which forms the axis of rotation of the pinion 151. The geared motor 161 is mounted on a reaction arm 171 articulated on the main part 31 of the cage 3, around
La crémaillère 127 de la barre 14 est visible à la figure 8, de mêmeque le pignon 154 associé à cette crémaillère. Le pignon 154 est entraîné par un moto- réducteur 166 dont on note 156 l'arbre de sortie. L'axe longitudinal Xi56 de l'arbre 156 forme l'axe de rotation du pignon 154. Le moto-réducteur 166 est monté sur un bras de réaction 172 articulé autour par rapport à la partie 31 autour de l'axe Xi56 qui est vertical. Les bras de réaction 171 et 172 sont respectivement associés à des amortisseurs 174 et 176. Les barres 15 et 19 sont également équipées de crémaillères, respectivement 127' et 125', en prise chacune avec un pignon 154' et 151 '. Ces pignons sont chacun entraînés par un moto-réducteur 161 'ou 166' supporté par un bras de réaction 171 ', 172' articulé sur la partie principale 31 de la cage 3 autour d'un axe longitudinal X153', Xi56' de l'arbre de sortie 153' ou 156' de ces moto- réducteurs qui forment les axes de rotation des pignons 151 ' et 154'.The rack 127 of the bar 14 is visible in Figure 8, and the pinion 154 associated with this rack. The pinion 154 is driven by a geared motor 166 which 156 is noted the output shaft. The longitudinal axis Xi 56 of the shaft 156 forms the axis of rotation of the pinion 154. The geared motor 166 is mounted on a reaction arm 172 hinged about the portion 31 about the axis Xi 56 which is vertical. The reaction arms 171 and 172 are respectively associated with dampers 174 and 176. The bars 15 and 19 are also equipped with racks, respectively 127 'and 125', each engaged with a pinion 154 'and 151'. These pinions are each driven by a geared motor 161 'or 166' supported by a reaction arm 171 ', 172' articulated on the main part 31 of the cage 3 around a longitudinal axis X 153 ', Xi 56 ' of the output shaft 153 'or 156' of these geared motors which form the axes of rotation of the gears 151 'and 154'.
Deux amortisseurs 174' et 176' permettent d'amortir le pivotement des bras 171 ' et 172', respectivement autour des axes Xi53' et Xi56'Two dampers 174 'and 176' make it possible to damp the pivoting of the arms 171 'and 172', respectively around the axes Xi 53 'and Xi 56 '
L'unité 200 coordonne le fonctionnement des moto-réducteurs 161 , 161 ', 166 et 166' pour assurer la translation horizontale effective du chariot formé des sous-ensembles 13 à 19.The unit 200 coordinates the operation of the geared motors 161, 161 ', 166 and 166' to ensure the effective horizontal translation of the carriage formed of the subassemblies 13 to 19.
Les moto-réducteurs 161 , 161 ', 166 et 166' permettent d'exercer, sur les barres 14, 15, 18 et 19 du chariot constitué par les éléments 13 à 19, un effort dirigé vers le rouleau 10, c'est-à-dire à l'opposé de la cage 4, et égal à la somme des efforts de traction Ti et T2.The geared motors 161, 161 ', 166 and 166' make it possible to exert, on the bars 14, 15, 18 and 19 of the carriage constituted by the elements 13 to 19, a force directed towards the roll 10, that is to say opposite the cage 4, and equal to the sum of the tensile forces Ti and T 2 .
Cet effort de traction tend à rapprocher le mandrin 12 du rouleau 10 en translation parallèlement à l'axe X2, ce qui permet d'exercer les efforts de conformation F1 et F2 sur les faces 101 et 102 de la pièce 100. En cas d'irrégularité sur l'une de ces surfaces, notamment au début du processus du laminage où l'ébauche est relativement irrégulière, le mandrin 12, la colonne 13 et le plateau 16 peuvent être repoussés temporairement en direction de l'axe centralThis tensile force tends to bring the mandrel 12 of the roll 10 in translation parallel to the axis X 2 , which makes it possible to exert the shaping forces F 1 and F 2 on the faces 101 and 102 of the piece 100. case of irregularity on one of these surfaces, especially at the beginning of the rolling process where the blank is relatively irregular, the mandrel 12, the column 13 and the plate 16 can be pushed temporarily towards the central axis
Z10O de la pièce 100. Ceci est possible du fait du pivotement d'un ou plusieurs des bras de réaction 171 , 171 ', 172 et 172' autour de leurs axes d'articulation respectifs sur la partie 31. Ce mouvement d'articulation est amorti par les amortisseurs 174, 174', 176 et 176'.Z 10O of the workpiece 100. This is possible due to the pivoting of one or more of reaction arms 171, 171 ', 172 and 172' around their respective axes of articulation on the portion 31. This joint movement is damped by the dampers 174, 174 ', 176 and 176'.
Comme en ce qui concerne la commande du rouleau 22, ce mouvement de pivotement des bras de réaction 171 , 171 ', 172 et 172' permet d'absorber les couples antagonistes qui s'exercent sur les arbres 153, 153', 156 et 156' d'entraînement des pignons 151 , 151 ', 154 et 154'.As with the control of the roller 22, this pivoting movement of the reaction arms 171, 171 ', 172 and 172' makes it possible to absorb the antagonistic pairs which are exerted on the shafts 153, 153 ', 156 and 156 for driving sprockets 151, 151 ', 154 and 154'.
Le laminoir 1 est également pourvu de bras de centrage 200 et 202 équipés chacun d'un rouleau 220 ou 222 destiné à venir en appui contre la surface 101 de la pièce 100 en cours de laminage. Les éléments 200 et 220 ne sont pas représentés à la figure 2, pour la clarté du dessin.The rolling mill 1 is also provided with centering arms 200 and 202 each equipped with a roller 220 or 222 intended to bear against the surface 101 of the part 100 during rolling. The elements 200 and 220 are not shown in Figure 2, for clarity of the drawing.
Le bras de centrage 200 est déplacé vers l'axe central Z100 de la pièce 100 en cours de laminage au moyen d'un moto-réducteur électrique 261 dont l'arbre de sortie 253 est équipée d'un pignon 251 qui engrène sur un autre pignon 281 , fixé sur le bras 200. De même, un moto-réducteur 266 a son arbre de sortie 256 équipé d'un pignon 254 qui engrène avec un deuxième pignon 284 fixé sur le bras 202.The centering arm 200 is moved towards the central axis Z100 of the part 100 during rolling by means of an electric gear motor 261 whose output shaft 253 is equipped with a pinion 251 which meshes with another pinion 281, fixed on the arm 200. Similarly, a geared motor 266 has its output shaft 256 equipped with a pinion 254 which meshes with a second pinion 284 fixed on the arm 202.
Chaque moto-réducteur 261 ou 266 est monté sur un support 271 ou 272 en forme de bras de réaction articulé sur la partie 31 autour de l'axe longitudinal X253 ou X256 de l'arbre de sortie 253 ou 256 correspondant à ce moto-réducteur.. Des amortisseurs 274 et 276 analogues à ceux mentionnés pour la commande de la position verticale du rouleau 22, sont utilisés pour amortir les mouvements de pivotement des bras de réaction 271 et 272 autour de leurs axes d'articulation respectifs. Ces mouvements de pivotement peuvent résulter d'irrégularités de la surface 101 et sont absorbés sans dommage pour les pignons 251 , 281 , 254 et 284 et les moto-réducteurs 261 et 266.Each geared motor 261 or 266 is mounted on a support 271 or 272 in the form of hinged reaction arm part 31 about the longitudinal axis X 25 X 25 3 or 6 of the output shaft 253 or 256 corresponding to This geared motor. Shocks 274 and 276 similar to those mentioned for the control of the vertical position of the roller 22, are used to damp the pivoting movements of the reaction arms 271 and 272 about their respective hinge axes. These pivoting movements may result from irregularities in the surface 101 and are absorbed without damage to the gears 251, 281, 254 and 284 and the geared motors 261 and 266.
Il est avantageux en termes d'approvisionnement, de fabrication et de maintenance que les amortisseurs 74, 76, 174, 174', 176, 176', 274 et 276 utilisés pour absorber l'énergie due au pivotement des différents bras de réaction soient identiques. Ceci n'est toutefois pas obligatoire.It is advantageous in terms of supply, manufacture and maintenance that the dampers 74, 76, 174, 174 ', 176, 176', 274 and 276 used to absorb the energy due to the pivoting of the different reaction arms are identical. . This is not required, however.
Le pivotement des bras de réaction 171 , 171 ', 172, 172', 271 et 272 peuvent être détectés, comme expliqué au sujet du pivotement des bras de réaction 71 et 72. La détection du pivotement des bras 171 , 171 ', 172, 172', 271 et 272 peut être utilisée, comme expliqué en référence au détecteur 91 , pour signaler une irrégularité de surface à l'unité 200 qui peut alors adapter le fonctionnement du laminoir 1.The pivoting of the reaction arms 171, 171 ', 172, 172', 271 and 272 can be detected, as explained about the pivoting of the reaction arms 71 and 72. The detection of the pivoting of the arms 171, 171 ', 172, 172 ', 271 and 272 can be used, as explained with reference to the detector 91, to signal a surface irregularity to the unit 200 which can then adapt the operation of the mill 1.
En pratique, un détecteur du type du détecteur 91 est associé à chaque bras 171 , 171 ', 172, 172', 271 et 272. On peut prévoir que, lorsque le pivotement d'un des bras de réaction a été détecté par l'un des détecteurs, la vitesse de rotation des rouleaux 10, 12, 20 et 22 est diminuée, jusqu'au retour de ce bras de réaction à position normale, ce qui est également détecté le par le détecteur en question.In practice, a detector of the type of the detector 91 is associated with each arm 171, 171 ', 172, 172', 271 and 272. It can be provided that, when the pivoting of one of the reaction arms has been detected by the one of the detectors, the speed of rotation of the rollers 10, 12, 20 and 22 is decreased, until the return of this reaction arm to normal position, which is also detected by the detector in question.
En outre, l'unité 200 peut commander les moto-réducteurs qui coopèrent pour l'entraînement d'un même rouleau de façon coordonnée. Par exemple, lorsque le détecteur 91 associé à l'amortisseur 74 a détecté un pivotement du brasIn addition, the unit 200 can control the geared motors which cooperate to drive the same roll in a coordinated manner. For example, when the detector 91 associated with the damper 74 has detected a pivoting of the arm
71 autour de l'axe X53, l'unité 200 en est informée grâce au signal Si . En tenant compte de ce signal, l'unité 200 peut commander le moto-réducteur 66 pour que celui-ci actionne l'arbre 56 de façon à compenser, au niveau des pignons 54 et 55 et des crémaillères 26 et 28, le décalage angulaire qui s'est produit autour de l'axe71 around the axis X53, the unit 200 is informed by the signal Si. Taking account of this signal, the unit 200 can control the geared motor 66 so that it actuates the shaft 56 so as to compensate, at the pinions 54 and 55 and the racks 26 and 28, the angular offset that occurred around the axis
X53. Ceci permet d'assurer l'équilibre des efforts verticaux exercés sur le chariotX53. This makes it possible to ensure the balance of the vertical forces exerted on the carriage
24 par les différents ensembles pignons/crémaillères.24 by the different sets of gears and racks.
De la même façon, si l'un des détecteurs associé à l'un des amortisseurs 174, 174', 176 et 176' détecte le pivotement de l'un des bras 171 , 171 ', 172 ou 172', l'unité 200 peut piloter les moto-réducteurs autres que celui supporté par le bras de réaction dont le pivotement a été détecté pour compenser l'éventuel déséquilibre dans l'entraînement du de la colonne 13 ou du plateau 16. Ceci permet d'assurer que le mandrin 12 et le logement 17 sont en permanence correctement alignés et que le chariot 13-19 n'est pas soumis à des efforts susceptibles de le déformer. Cette coordination de l'action des moto-réducteurs est possible du fait que l'on détecte rapidement, grâce aux bras de réaction articulés et aux détecteurs associés, les irrégularités de la pièce à traiter. II ressort des explications qui précèdent que chacun des chariots 13-19 ou 24 de déplacement en translation horizontale ou verticale des rouleaux 12 ou 22 porte quatre crémaillères 25 à 28, 125, 127 ou équivalentes qui coopèrent chacune avec un pignon 51 , 52, 54, 55, 151 ou équivalent. Ceci permet de repartir les efforts subits par ces chariots. L'invention été représentée lors de sa mise en œuvre pour le contrôle de la position des rouleaux de conformation 12 et 22. Elle peut n'être mise en œuvre que pour la commande d'un seul de ces rouleaux de conformation. De même, sa mise en œuvre pour la commande des bras de centrage 200 et 202 est optionnelle. La cage 4 est équipée d'un moto-réducteur 461 qui entraîne un pignonIn the same way, if one of the detectors associated with one of the dampers 174, 174 ', 176 and 176' detects the pivoting of one of the arms 171, 171 ', 172 or 172', the unit 200 can drive geared motors other than that supported by the reaction arm whose pivoting has been detected to compensate for the possible imbalance in the drive of the column 13 or the plate 16. This ensures that the mandrel 12 and housing 17 are permanently correctly aligned and that the carriage 13-19 is not subject to efforts that could distort it. This coordination of the action of the geared motors is possible because the articulated reaction arms and the associated detectors rapidly detect the irregularities of the part to be treated. From the foregoing explanations, it can be seen that each of the carriages 13-19 or 24 of displacement in horizontal or vertical translation of the rollers 12 or 22 carries four racks 25 to 28, 125, 127 or equivalent which each cooperate with a pinion 51, 52, 54 , 55, 151 or equivalent. This allows to restart the sudden efforts by these carts. The invention has been shown in its implementation for the control of the position of the conformation rollers 12 and 22. It can be implemented only for the control of only one of these conformation rollers. Similarly, its implementation for the control of the centering arms 200 and 202 is optional. The cage 4 is equipped with a gear motor 461 which drives a pinion
451 en prise avec une crémaillère 462 qui s'étend sur le châssis principal 2 parallèlement à l'axe X2. Il est ainsi possible de commander la position de la cage axiale 4 le long de l'axe X2.451 engaged with a rack 462 which extends on the main frame 2 parallel to the axis X 2 . It is thus possible to control the position of the axial cage 4 along the axis X 2 .
Le moto-réducteur 461 est supporté par un bras de réaction 471 articulé sur le châssis 41 de la cage 4 autour d'un axe parallèle à l'axe de sortie du moto- réducteur 461.The geared motor 461 is supported by a reaction arm 471 hinged to the frame 41 of the cage 4 about an axis parallel to the output axis of the gear motor 461.
L'invention a été décrite avec des moyens d'amortissement constitués par des amortisseurs à piston et empilement de rondelles Belleville. D'autres types d'amortisseurs sont envisageables, notamment des amortisseurs à ressorts hélicoïdaux de compression, des amortisseurs à gaz ou des amortisseurs avec bloc d'élastomère. The invention has been described with damping means constituted by piston dampers and stacking Belleville washers. Other types of dampers are conceivable, such as compression coil spring dampers, gas dampers or dampers with elastomer block.

Claims

REVENDICATIONS
1. Laminoir circulaire (1 ) pour la conformation de pièces annulaires (100), ce laminoir comprenant une paire de rouleaux, respectivement interne (12) et externe (10), aptes à façonner (F^F2) les faces radiales interne (102) et externe (101 ) d'une pièce (100) et une paire de rouleaux coniques, respectivement supérieur (22) et inférieur (20), aptes à façonner (F3+F4) les faces frontales (103, 104) de la pièce, ainsi que des moyens (61 , 66, 161 , 161 ', 166, 166') de déplacement de certains au moins de ces rouleaux par rapport à un châssis (2, 31 , 41 ) du laminoir, caractérisé : en ce que les moyens de déplacement d'au moins un (12, 22) des rouleaux comprennent au moins un pignon (51 , 52, 54, 55, 151 , 151 ' 154, 154') et au moins une crémaillère (25-28, 125, 125', 127, 127') solidaire d'un organe (24, 13-19) de déplacement du rouleau, en ce que le pignon est entraîné en rotation par l'arbre de sortie (53, 56, 153, 153' 156, 156') d'un moto-réducteur électrique (61 , 66, 161 , 161 ', 166, 166') monté sur un support (71 , 72, 171 , 171 ', 172, 172') articulé par rapport au châssis autour de l'axe de rotation (X53, X56, X153, X153', X156, X156') du pignon et en ce que des moyens d'amortissement (74, 76, 174, 174', 176, 176') sont prévus pour amortir le pivotement (F6) du support autour de son axe d'articulation.1. Circular rolling mill (1) for the conformation of annular pieces (100), this rolling mill comprising a pair of rollers, respectively internal (12) and external (10), able to shape (F ^ F 2 ) the internal radial faces ( 102) and outer (101) of a piece (100) and a pair of conical rollers, respectively upper (22) and lower (20), able to shape (F 3 + F 4 ) the end faces (103, 104). of the piece, as well as means (61, 66, 161, 161 ', 166, 166') for displacing at least some of these rollers with respect to a frame (2, 31, 41) of the rolling mill, characterized in that the means for moving at least one (12, 22) of the rollers comprises at least one pinion (51, 52, 54, 55, 151, 151 '154, 154') and at least one rack (25-28 , 125, 125 ', 127, 127') integral with a roller moving member (24, 13-19), in that the pinion is rotated by the output shaft (53, 56, 153, 153 '156, 156') of an electric geared motor (61, 66, 161, 161 ', 166, 166') mounted on a support (71, 72, 171, 171 ', 172, 172') hinged relative to the frame about the axis of rotation (X 53 , X 56 , X 153 , X 153 ', X 156 , X 156 ') of the pinion and that damping means (74, 76, 174, 174 ', 176, 176') are provided for damping the pivoting (F 6 ) support around its axis of articulation.
2. Laminoir selon la revendication 1 , caractérisé en ce que le rouleau conique supérieur (22) est monté sur un chariot (24) déplaçable (F3) selon une direction verticale (Z1Oo) et sur lequel est fixée la crémaillère (25-28), l'ensemble pignon/crémaillère (51 , 52, 54, 55 / 25-28) étant apte à exercer sur le chariot un effort vertical (F10) dirigé vers le rouleau conique inférieur (20).2. Rolling mill according to claim 1, characterized in that the upper conical roller (22) is mounted on a carriage (24) movable (F 3 ) in a vertical direction (Z 1O o) and on which is fixed the rack (25). -28), the pinion / rack assembly (51, 52, 54, 55 / 25-28) being adapted to exert on the carriage a vertical force (F 10 ) directed towards the lower conical roller (20).
3. Laminoir selon l'une des revendications précédentes, caractérisé en ce que le rouleau interne (12) est monté sur un chariot (13-19) déplaçable selon une direction horizontale (X2) et sur lequel est fixée la crémaillère (125, 125', 127, 127'), l'ensemble pignon/crémaillère (151 /125, 1517125', 154/127, 1547127') étant apte à exercer sur le chariot un effort horizontal (T1 +T2) dirigé vers le rouleau cylindrique externe (10). 3. Rolling mill according to one of the preceding claims, characterized in that the inner roller (12) is mounted on a carriage (13-19) movable in a horizontal direction (X 2 ) and on which is fixed the rack (125, 125 ', 127, 127'), the pinion / rack assembly (151/125, 1517125 ', 154/127, 1547127') being able to exert on the carriage a horizontal force (T 1 + T 2 ) directed towards the outer cylindrical roller (10).
4. Laminoir selon l'une des revendications 2 ou 3, caractérisé en ce que le chariot (13-19, 24) porte au moins deux crémaillères (25-28, 125, 125', 127, 127') en prise chacune avec un pignon (51 , 52, 54, 55, 151 , 151 ', 154, 154'), chaque pignon étant entraîné en rotation par l'arbre de sortie (53, 56, 153, 153', 156, 156') d'un moto-réducteur électrique dédié (61 , 66, 161 , 161 ', 166, 166') monté sur un support indépendant (71 , 72, 171 , 171 ', 172, 172') articulé sur le châssis autour de l'axe (X53, X56, X153, X153', X156, X156') de rotation du pignon et en ce que des moyens (74, 76, 174, 174', 176, 176') d'amortissement du pivotement de chaque support sont prévus. 4. Rolling mill according to one of claims 2 or 3, characterized in that the carriage (13-19, 24) carries at least two racks (25-28, 125, 125 ', 127, 127') each engaged with a pinion (51, 52, 54, 55, 151, 151 ', 154, 154'), each pinion being rotated by the output shaft (53, 56, 153, 153 ', 156, 156') d a dedicated electric gear motor (61, 66, 161, 161 ', 166, 166') mounted on an independent support (71, 72, 171, 171 ', 172, 172') articulated on the frame around the axis (X53, X56, X153, X153 ', X156, X156') of rotation of the pinion and that means (74, 76, 174, 174 ', 176, 176') for damping the pivoting of each support are provided.
5. Laminoir selon l'une des revendications précédentes, caractérisé en ce qu'il comprend également au moins un rouleau (220, 222) de suivi et de centrage de la surface radiale externe (101 ) de la pièce (100), en ce que chaque rouleau de centrage est monté sur un bras mobile (200, 202) solidaire d'un premier pignon (281 , 284) en prise avec un deuxième pignon (251 , 254), en ce que le deuxième pignon est entraîné par l'arbre de sortie (253, 256) d'un moto-réducteur électrique (261 , 266) monté sur un support (271 , 272) articulé par rapport au châssis (2, 31 ) autour de l'axe de rotation (X253, X256) du deuxième pignon (251 , 254) et en ce que des moyens d'amortissement (274, 276) sont prévus entre le support (271 , 272) et le châssis (31 ) pour amortir le pivotement du support autour de son axe d'articulation.5. Rolling mill according to one of the preceding claims, characterized in that it also comprises at least one roller (220, 222) for tracking and centering the outer radial surface (101) of the piece (100), in that that each centering roller is mounted on a movable arm (200, 202) integral with a first gear (281, 284) engaged with a second gear (251, 254), in that the second gear is driven by the output shaft (253, 256) of an electric gear motor (261, 266) mounted on a support (271, 272) articulated with respect to the frame (2, 31) about the axis of rotation (X 25 3 , X256) of the second pinion (251, 254) and in that damping means (274, 276) are provided between the support (271, 272) and the frame (31) for damping the pivoting of the support around its hinge axis.
6. Laminoir selon l'une des revendications précédentes, caractérisé en ce qu'il comprend des moyens (91 , 92) de détection du pivotement du support (71 , 72, 171 , 171 ', 172, 172', 271 , 272, 471 ) par rapport au châssis (2, 31 , 41 ), ces moyens étant aptes à fournir à une unité électronique (200) de commande du laminoir (1 ) un signal (Si) représentatif de ce pivotement.6. Rolling mill according to one of the preceding claims, characterized in that it comprises means (91, 92) for detecting the pivoting of the support (71, 72, 171, 171 ', 172, 172', 271, 272, 471) relative to the frame (2, 31, 41), these means being able to provide an electronic control unit (200) of the rolling mill (1) a signal (Si) representative of this pivoting.
7. Laminoir selon les revendications 6, caractérisé en ce que l'unité électronique (200) est apte à piloter deux moto-réducteurs (61 , 66, 161 , 161 ', 166, 166') en fonction des signaux (Si) reçus des moyens de détection (91 , 93) de façon à assurer un fonctionnement coordonné des moyens de déplacement d'au moins un (12, 22) des rouleaux.7. Rolling mill according to claims 6, characterized in that the electronic unit (200) is adapted to drive two geared motors (61, 66, 161, 161 ', 166, 166') according to the signals (Si) received detection means (91, 93) so as to ensure a coordinated operation of the means for moving at least one (12, 22) of the rollers.
8. Laminoir selon l'une des revendications précédentes, caractérisé en ce que les moyens d'amortissement (74, 76, 174, 174', 176, 176', 274, 276) comprennent une tige (81 ) reliée au support (71 , 72, 171 , 171 ', 172, 172', 271 , 272) et solidaire d'un piston (82) mobile à l'intérieur d'un corps (83) solidaire du châssis (2, 31 , 41 ), en définissant une chambre (84) de volume variable et en ce que cette chambre contient un organe (85) élastiquement déformable par compression. 8. Rolling mill according to one of the preceding claims, characterized in that the damping means (74, 76, 174, 174 ', 176, 176', 274, 276) comprise a rod (81) connected to the support (71). , 72, 171, 171 ', 172, 172', 271, 272) and secured to a piston (82) movable inside a body (83) integral with the frame (2, 31, 41), defining a chamber (84) of variable volume and in that this chamber contains a member (85) elastically deformable by compression.
9. Laminoir selon les revendications 6 et 8, caractérisé en ce que les moyens de détection (91 , 92) sont aptes à détecter un déplacement de la tige (81 ) par rapport au corps (83).9. Rolling mill according to claims 6 and 8, characterized in that the detection means (91, 92) are adapted to detect a movement of the rod (81) relative to the body (83).
10. Laminoir selon l'une des revendications 8 ou 9, caractérisé en ce que l'organe élastiquement déformable est un empilement de rondelles Belleville (85). 10. Rolling mill according to one of claims 8 or 9, characterized in that the elastically deformable member is a stack of Belleville washers (85).
EP09731268A 2008-03-21 2009-03-20 Circular rolling mill with shaping roller Active EP2274118B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0851834A FR2928850B1 (en) 2008-03-21 2008-03-21 CIRCULAR LAMINATOR WITH CONFORMATION ROLL
PCT/FR2009/050474 WO2009125102A1 (en) 2008-03-21 2009-03-20 Circular rolling mill with shaping roller

Publications (2)

Publication Number Publication Date
EP2274118A1 true EP2274118A1 (en) 2011-01-19
EP2274118B1 EP2274118B1 (en) 2011-10-12

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Application Number Title Priority Date Filing Date
EP09731268A Active EP2274118B1 (en) 2008-03-21 2009-03-20 Circular rolling mill with shaping roller

Country Status (8)

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US (1) US8683838B2 (en)
EP (1) EP2274118B1 (en)
KR (1) KR101541943B1 (en)
CN (1) CN102036767B (en)
AT (1) ATE528085T1 (en)
ES (1) ES2374793T3 (en)
FR (1) FR2928850B1 (en)
WO (1) WO2009125102A1 (en)

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Publication number Priority date Publication date Assignee Title
PL3177419T3 (en) * 2014-08-08 2020-08-24 Muraro S.R.L. Machine and method for shaping annular elements, such as rolling machine and a method for circular rolling annular elements
CN105522081B (en) * 2016-01-18 2018-07-27 山西双环重工集团有限公司 Ring rolls activity material supporting rack
EP3300814A1 (en) 2016-09-30 2018-04-04 Forge Pat GmbH Ring rolling mill with conformation rolls and process for controlling the position of a roll of such a rolling mill
KR101852265B1 (en) * 2016-09-30 2018-04-25 김영수 Cold roll forming apparatus
DE102017008449A1 (en) * 2017-09-08 2019-03-14 Schuler Pressen Gmbh Radial-axial ring rolling mill for rolling a ring
KR102162180B1 (en) * 2018-10-22 2020-10-08 칼텍(주) Ring mill for continuous forming and method thereof
KR102149757B1 (en) * 2018-10-31 2020-08-31 최원중 High precision hot rolling machine for preventing forming ring core burr by hydraulic automatic operation
CN109848340B (en) * 2018-12-29 2020-06-12 广东毅马集团有限公司 Ring rolling machine structure
CN116078960B (en) * 2023-04-07 2023-06-02 山西天宝集团有限公司 Ring rolling device suitable for T-shaped and L-shaped flange production and processing
CN116078961B (en) * 2023-04-07 2023-06-16 山西天宝集团有限公司 Ring rolling device of T.L type flange for new energy wind power generation

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DE2634625A1 (en) * 1976-07-31 1978-02-02 Banning Ag J Ring rolling mill with conical upsetting rolls - where guide rollers for the blank are fitted on upsetting stand
DE2923001A1 (en) * 1979-06-07 1981-01-22 Thyssen Industrie RING ROLLING MACHINE WITH MANDREL ROLLER TURRETHEAD
US4869088A (en) * 1988-07-05 1989-09-26 Kazuo Kadotani Ring shaping apparatus
DE4421596C2 (en) * 1994-06-21 1998-01-15 Bad Dueben Profilwalzmaschinen Ring rolling machine with damping device
CN2412677Y (en) * 1998-07-14 2001-01-03 沈芝蓉 Ring roller
US7748308B2 (en) * 2005-09-26 2010-07-06 Unico, Inc. Pneumatic biasing of a linear actuator and implementations thereof

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Title
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Also Published As

Publication number Publication date
EP2274118B1 (en) 2011-10-12
KR101541943B1 (en) 2015-08-05
WO2009125102A1 (en) 2009-10-15
CN102036767B (en) 2013-06-05
FR2928850A1 (en) 2009-09-25
US20110138871A1 (en) 2011-06-16
FR2928850B1 (en) 2010-04-02
CN102036767A (en) 2011-04-27
KR20100125429A (en) 2010-11-30
US8683838B2 (en) 2014-04-01
ATE528085T1 (en) 2011-10-15
ES2374793T3 (en) 2012-02-22

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