EP1024914B1 - Roll bending machine for forming a ring-shaped part - Google Patents

Roll bending machine for forming a ring-shaped part Download PDF

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Publication number
EP1024914B1
EP1024914B1 EP98950159A EP98950159A EP1024914B1 EP 1024914 B1 EP1024914 B1 EP 1024914B1 EP 98950159 A EP98950159 A EP 98950159A EP 98950159 A EP98950159 A EP 98950159A EP 1024914 B1 EP1024914 B1 EP 1024914B1
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EP
European Patent Office
Prior art keywords
rollers
machine according
rolling machine
supporting
rolling
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EP98950159A
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German (de)
French (fr)
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EP1024914A1 (en
Inventor
Charles Marcon
Jean-Paul Lespour
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Escofier Technologie SAS
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Escofier Technologie SAS
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    • 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
    • B21H1/12—Making articles shaped as bodies of revolution rings of restricted axial length rings for ball or roller bearings
    • 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 present invention relates generally to rolling of an annular part with a view to forming it by rolling, which, in practical, is cold rolling.
  • the annular part to be formed is, for example, a ring for ball bearing, or a ball retaining cage for constant velocity transmission with balls.
  • a machine comprising, on the one hand, various rotary members, namely, a forming mandrel, which is rotatably mounted about a first axis, and on which the annular part to be formed, or, more precisely, a blank thereof, must be engaged with play, a forming wheel, which is rotatably mounted around a second axis parallel to the first, and which is capable of defining, with the forming mandrel, a rolling envelope corresponding to the final shape sought for the cross section of this annular part, and two rollers support, which, coaxial with each other, without necessarily being carried by the same shaft, are rotatably mounted around a third axis parallel to the two preceding ones and situated in the same plane as these, and which are based on the forming mandrel on either side of the envelope rolling to absorb the reaction to the radial rolling force provided by the forming wheel, and, on the other hand, drive means specific to the rotational drive of at least
  • the worked annular part can be considered as constituting a finished part, i.e. a part not requiring no subsequent resumption of machining, except for a possible heat treatment and possible rectification after this one.
  • front control rollers means rollers which are intended to control a form of annular part already produced.
  • rollers have a completely different function from that of axial forming rollers such as those described in US-A-3 patent 681,962, in particular to FIGS. 4 to 8 of this document.
  • the forming wheel and the forming mandrel do not not define a rolling envelope between them, so that the axial deformation of the material is free between these two tools.
  • the present invention generally relates to a provision which, from this double point of view, gives particularly satisfaction.
  • a rolling machine for annular part to be formed of the kind comprising, on the one hand, various members rotary, i.e., a forming mandrel, which is rotatably mounted around a first axis, a forming wheel, which is rotatably mounted around a second axis parallel to the first, and which is capable of defining, with the mandrel of forming, a rolling envelope corresponding to the final shape sought for the cross section of the annular part concerned, and two rollers support, which, rotatably mounted around a third axis parallel to the two previous and located in the same plane as these, are based on the mandrel forming on either side of the rolling envelope, and, on the other hand, drive means specific to the rotational drive of at least one of these rotary members,
  • this rolling machine generally being characterized in that, two face control rollers being further provided to intervene each on the side faces of the part respectively annular at a distance from the rolling envelope, these control rollers face are
  • the axes of the face control rollers extend in the same plane as that, hereinafter said for convenience rolling plane, in which the axes of the mandrel of forming, the forming wheel, and the support rollers.
  • the work of the rolling machine according to the invention is done under conditions of symmetry and stability advantageously favorable to face control sought.
  • the following rolling machine the invention comprises follower rollers, which, rotatably mounted, frame the rolling envelope for maintaining, in the rolling plane, the axis of the worked annular part.
  • the annular part 10 is intended to form the outer ring of a ball bearing.
  • the faces 13 of the annular part 10 are not planar, but comprise at contrary, in draft, two frustoconical sections which join one another along a joint plane T, Figures 4A, 4A '.
  • the invention proposes, by a face check, the elimination of these surface irregularities.
  • the initial 10 'draft is, for example, and such that shown, a simple section of tube, the internal face 12 'of which is smooth.
  • the rolling used for this purpose is, in practice, according to modalities described in more detail later, on a rolling 15, and it is necessarily accompanied by an increase in the diameter of the annular piece 10 worked.
  • the rolling machine 15 comprises, on the one hand, on the one hand, various rotary members 16, 18 , 20, namely, a forming mandrel 16, which is rotatably mounted around a first axis A 1 , and on which the annular part 10 to be formed, or, more precisely, the blank 10 'thereof, must be entered with play, one.
  • forming wheel 18, which is rotatably mounted around a second axis A 2 parallel to the first, and which is capable of defining, with the forming mandrel 16, a rolling envelope 19, corresponding to the final shape sought for the cross section of this annular part 10, and two support rollers 20, which, rotatably mounted around a third axis A 3 parallel to the previous two and located in the same plane P as these, said here for convenience of rolling plane , are based on the forming mandrel 16 on either side of the rolling envelope 19, and, on the other hand, drive means E specific to the drive in rotation of at least one of these rotary members 16, 18, 20.
  • the forming mandrel 16 comprises, on the one hand, a median section 21, which is of reduced cross section, and on which annularly protruding a duly profiled rib 22 for forming the groove 14, and, on the other hand, two lateral sections 23, which are of section larger transverse and on which bear the support rollers 20.
  • the forming wheel 18 itself has a middle section 24, which is of reduced cross section, and two lateral sections 25, which are of larger cross section, to contain the axial creep of the annular part 10.
  • the rolling machine 15 also comprises, on either side of the forming mandrel 16, two follower rollers 26, which, mounted to rotate about axes A 5 , frame the rolling envelope 19.
  • These follower rollers 26 operate on the external face 11 of the annular part 10, in order to control the roundness and the symmetry and to take up any deformations thereof, and it follows that, during forming, the axis A 4 of this annular part 10 remains in the rolling plane P of the axes A 1 ,, A 2 , A 3 .
  • the axes A 5 of the follower rollers 26 are therefore away from this rolling plane P, on either side of it.
  • These axes A 5 are substantially parallel to the axes A 1 , A 2 , A 3 above , but one of them, at least, can however be advantageously slightly inclined with respect to these, to compensate for possible defects in external taper.
  • the follower rollers 26 are arranged so perfectly symmetrical with respect to the rolling plane P, being for this do duly maintained by means of support, known in themselves and not shown.
  • the drive means E which have only been schematically shown in broken lines in Figure 5, are also of known type.
  • the drive means E are applied to the forming wheel 18 and to the support rollers 20.
  • the rolling machine 15 finally comprises a probe 27, for checking the diameter of the annular part 10.
  • This probe 27 intervenes between the support rollers 20.
  • two face control rollers 29 being in additionally provided to each intervene respectively on the lateral faces 13 of the annular part 10 at a distance from the rolling envelope 19, such as shown schematically in Figure 5, these face control rollers 29 are arranged between the support rollers 20, in the overall volume enveloping the outer outline of these.
  • the axes A 6 of the face control rollers 29 extend in the same plane as that in which the axes A 1 of the forming mandrel 16 also extend. , A 2 of the forming wheel 18, and A 3 of the support rollers 20, that is to say in the rolling plane P.
  • the face control rollers 29 are cylindrical, and, at least at the end of work, their axes A 6 are parallel to each other.
  • their diameter d is less than their length I.
  • this diameter d is less than at least half the length I.
  • the diameter d of the face control rollers 29 is preferably chosen to be as low as possible so that these rollers face control 29 are as penetrating as possible with little effort.
  • the face control rollers 29 are each respectively at least partly arranged inside the support rollers 20, each of these support rollers 20 comprising, recessed, on its internal face 30, and withdrawal from its periphery 31, a recess 32 in which the roller corresponding face control 29 is at least partially engaged.
  • the support rollers 20 can rest on the mandrel of forming 16 as close as possible to the rolling envelope 19, which allows a effective support of this forming mandrel 16 by these support rollers 20 and therefore limits its bending.
  • the recess 32 which each of the support rollers 20 thus comprises extends circularly all around its axis A 3 .
  • Each of the support rollers 20 thus comprises a flange 20a, which, at its periphery 31, annularly, projecting towards the other, a flange 20b, and which, in its central area, has, axially, projecting in the direction opposite the previous one, a thick part 20c forming a hub.
  • the face control rollers 29 are free in rotation.
  • each of these face control rollers 29 is rotatably mounted on a support arm 34 pivotally mounted about a main pivot axis A 7 orthogonal to the axis A 3 of the support rollers 20 .
  • each of the support arms 34 which thus comprises the rolling machine 15 according to the invention extends generally diametrically with respect to the rollers support 20 and has a central recess 35, of circular outline, for the passage, in particular, of the support shaft 36 of these support rollers 20.
  • This support shaft 36 has been shown diagrammatically in broken lines on Figure 8.
  • the main pivot axis A 7 of each of the support arms 34 intersects the axis A 3 of the support rollers 20, as shown schematically in lines interrupted in Figure 7.
  • the two support arms 34 which are of configuration analogous, each in the form of a flange, with a part median annular 37, around their central recess 35, and, in positions diametrically opposite to each other, two radial extensions 38 in favor of one of which the front control roller intervenes 29 corresponding.
  • the support arms 34 are connected to each other, in an articulated manner, by at least one flange 39, here called for simple convenience central flange.
  • two central flanges 39 are provided, which, parallel to one another, each extend respectively in diametrically opposite positions relative to each other and intersect one and the the other main pivot axis A 7 of each of the support arms 34.
  • the main pivot axis A 7 of each of the support arms 34 is materialized by two pins 40, which are directed, radially, towards the axis A 3 of the support rollers 20, and which , directly or indirectly, bear, radially, in diametrically opposite positions with respect to each other, on a sleeve 41 centered on the axis A 3 of the support rollers 20.
  • this sleeve 41 is in two parts, namely, an internal part 41A, which, engaged on the support shaft 36 of the support rollers 20, and therefore integral in rotation thereof, is in axial contact with the corresponding support roller 20, and an external part 41B, which, forming a bearing, surrounds the internal part 41A, with the interposition of rolling means 42, and on which the pins 40 bear.
  • the pins 40 carry on the sleeve 41 by means of bearings 43, FIG. 7, and, for the support of these, the external part 41B of this sleeve 41 has, in positions diametrically opposite to each other, two flats 44.
  • the support arms 34 constitute, with the flanges 39 connecting them, a clamp-like structure, and, at their opposite end to the face control rollers 29, they are jointly subjected to a spacer 45.
  • this spacing device 45 intervenes between the arms support 34, and more precisely between the radial extensions 38 corresponding to these.
  • this spacing device 45 implements a wedge 46, which, under the control of a control device 47, and as shown diagrammatically by the double arrow F 1 in FIG. 7, is mounted movable in a plane perpendicular to the axis A 3 of the support rollers 20, and therefore perpendicular to the rolling plane P, preferably micrometrically.
  • the wedge 46 intervenes between two blocks 48 whose opposite surface is semi-cylindrical, with generatrices parallel to the main pivot axis A 7 of the support arms 34, and on which these arms support 34 are each articulated respectively.
  • the two support arms 34 are also jointly coupled to an anchoring device 52 capable of blocking them in rotation relative to the axis A 3 of the rollers of support 20, figure 7.
  • each of the face control rollers 29 is directly rotatably mounted on its support arm 34.
  • each of the face control rollers 29 extends into a recess 53 in its arm support 34 which runs right through it.
  • this recess 53 affects, in the manner a slot, the corresponding radial extension 38 of this support arm 34, and, at the end of this radial extension 38, it is closed by a flange of centering 55.
  • shaft 56 of such a face control roller 29 can be advantageously supported at either end, such that shown schematically in broken lines in Figure 7, and as shown in lines shown in Figure 8.
  • stop means are also provided to ensure that the support arms 34 of the face control rollers 29 stop rotating with respect to their axis A 3 , and thus allow the axes A 6 of the control rollers to be maintained. side 29 in the rolling plane P.
  • the face control rollers 29 are only put in timely action during forming, depending on the diameter of the annular part 10 to be worked.
  • corner 46 is then pressed between the extensions 38 support arms 34 opposite the face control rollers 29.
  • this inclination can also be compensated for by using tapered front control rollers 29, as shown schematically in Figure 11.
  • central flanges 39 connecting to each other the two support arms 34 advantageously serve to take up at this level the radial rolling reactions and thus advantageously relieve the means bearing 42 internal to the sleeve 41.
  • the axes A 6 of the face control rollers 29 extend in the rolling plane P, they permanently intersect the axis A 4 of the annular part 10 during forming, despite the change in diameter of this, which, as a corollary with the action of the follower rollers 26, is advantageously a guarantee of maintaining the circular configuration of this annular part 10.
  • the embodiment more particularly represented on the Figures 12 to 14 concern the case where the front control to be performed in front work asymmetrically on the side faces 13 of the part annular 10, it is possible to choose one of these lateral faces 13 as reference face for the assembly.
  • the support arms 34 are connected, to each other, at a distance from their main pivot axis A 7 , and in an articulated manner, each along a secondary axis.
  • pivot A ' 7 parallel to the main pivot axis A 7 above , by at least one flange 57, hereinafter called for simple convenience end flange, which is parallel to the central flanges 39, and which is the same length than these.
  • the support arms 34 then constitute, with the flanges 39 and 57 which connect them, a structure in the form of a deformable parallelogram, and, as shown diagrammatically by a double arrow F 4 in the figure. 12, the assembly is subjected to a control device 58 capable of allowing its position control with respect to the annular part 10 to be worked, by rotation around the pivot axes A 7 , A ' 7 , which, the one of the support arms 34 being for example taken as a reference, makes it possible to work preferentially one of the lateral faces 13 of this annular part 10 rather than the other of these.
  • each of the face control rollers 29 is rotatably mounted on its support arm 34 by means of a roller support 59 pivotally mounted on this support arm 34 around a tilting axis A 8 , which, parallel to that A 6 of this face control roller 29, extends at a distance therefrom.
  • roller support 59 is subjected to two jacks 60, 61, which each extend respectively on either side of its pivot axis A 8 , and which bear on the arm support 34.
  • these jacks 60, 61 are integrated into this support arm 34.
  • the relative alignment of the face control rollers 29 can be ensured by acting accordingly on the control device 58 and / or on the cylinders 60, 61.
  • Different pressures in each of the cylinders 60 allow obtain a pressure level for one of the face control rollers 29 higher than that of the other, and thereby respect the asymmetry relationship to satisfied.
  • the surface lamination of the lateral faces thereof can be done at an angle to this axis, whatever the nature, cylindrical or conical, face control rollers used.
  • these rolls of face control can optionally have a scalable exterior surface if desired.
  • this ring which comprises a groove
  • the forming wheel and the forming mandrel in turn have inverted conjugate forms.

Description

La présente invention concerne d'une manière générale le roulage d'une pièce annulaire en vue d'un formage de celle-ci par un laminage, qui, en pratique, est un laminage à froid.The present invention relates generally to rolling of an annular part with a view to forming it by rolling, which, in practical, is cold rolling.

Elle vise plus particulièrement, mais non nécessairement exclusivement, le cas où la pièce annulaire à former est, par exemple, une bague pour roulement à billes, ou une cage de maintien de billes pour transmission homocinétique à billes.More specifically, but not necessarily exclusively, the case where the annular part to be formed is, for example, a ring for ball bearing, or a ball retaining cage for constant velocity transmission with balls.

Pour le roulage d'une telle pièce annulaire, il est connu de mettre en oeuvre une machine comportant, d'une part, divers organes rotatifs, à savoir, un mandrin de formage, qui est monté rotatif autour d'un premier axe, et sur lequel la pièce annulaire à former, ou, plus précisément une ébauche de celle-ci, doit être engagée avec jeu, une molette de formage, qui est montée rotative autour d'un deuxième axe parallèle au premier, et qui est apte à définir, avec le mandrin de formage, une enveloppe de roulage correspondant à la forme finale recherchée pour la section transversale de cette pièce annulaire, et deux galets d'appui, qui, coaxiaux l'un avec l'autre, sans pour autant être nécessairement portés par un même arbre, sont montés rotatifs autour d'un troisième axe parallèle aux deux précédents et situé dans le même plan que ceux-ci, et qui s'appuient sur le mandrin de formage de part et d'autre de l'enveloppe de roulage pour encaisser la réaction à l'effort radial de roulage fourni par la molette de formage, et, d'autre part, des moyens d'entraínement propres à l'entraínement en rotation de l'un au moins de ces organes rotatifs.For rolling such an annular part, it is known to use operates a machine comprising, on the one hand, various rotary members, namely, a forming mandrel, which is rotatably mounted about a first axis, and on which the annular part to be formed, or, more precisely, a blank thereof, must be engaged with play, a forming wheel, which is rotatably mounted around a second axis parallel to the first, and which is capable of defining, with the forming mandrel, a rolling envelope corresponding to the final shape sought for the cross section of this annular part, and two rollers support, which, coaxial with each other, without necessarily being carried by the same shaft, are rotatably mounted around a third axis parallel to the two preceding ones and situated in the same plane as these, and which are based on the forming mandrel on either side of the envelope rolling to absorb the reaction to the radial rolling force provided by the forming wheel, and, on the other hand, drive means specific to the rotational drive of at least one of these rotary members.

Une telle machine de roulage se trouve notamment décrite, succinctement, dans le brevet américain No Re 26 594.Such a rolling machine is notably described, succinctly, in U.S. Patent No. Re 26,594.

Pour certaines applications, au moins, il est demandé que, au sortir d'une telle machine de roulage, la pièce annulaire travaillée puisse être considérée comme constituant une pièce finie, c'est-à-dire une pièce ne nécessitant pas de reprise d'usinage ultérieure, sauf en ce qui concerne un éventuel traitement thermique et la rectification éventuellement nécessaire après celui-ci.For some applications, at least, it is requested that, upon exiting of such a rolling machine, the worked annular part can be considered as constituting a finished part, i.e. a part not requiring no subsequent resumption of machining, except for a possible heat treatment and possible rectification after this one.

Or, le plan de joint intervenant inévitablement entre la molette de formage et le mandrin de formage laisse nécessairement des traces sur les faces latérales de la pièce annulaire travaillée.However, the parting line inevitably intervening between the thumb wheel forming and the forming mandrel necessarily leaves traces on the lateral faces of the worked annular part.

Il a donc été envisagé, comme cela a déjà été le cas dans d'autres domaines, par exemple pour la fabrication à chaud de bagues mécaniques de grand diamètre, de faire intervenir sur ces faces latérales, à distance de l'enveloppe de roulage, deux rouleaux de contrôle de face, à raison d'un rouleau par face latérale à contrôler, pour un surfaçage de ces faces.It has therefore been considered, as has already been the case in other fields, for example for the hot manufacture of mechanical rings of large diameter, to intervene on these side faces, away from the rolling envelope, two front control rollers, one roller per side face to be checked, for surfacing these faces.

On entend par rouleaux de contrôle de face des rouleaux qui sont destinés à contrôler une forme de pièce annulaire déjà réalisée.The term front control rollers means rollers which are intended to control a form of annular part already produced.

De tels rouleaux ont une fonction totalement différente de celle de rouleaux de formage axial tels que ceux décrits dans le brevet US-A-3 681 962, notamment aux figures 4 à 8 de ce document.Such rollers have a completely different function from that of axial forming rollers such as those described in US-A-3 patent 681,962, in particular to FIGS. 4 to 8 of this document.

Sur ces figures, la molette de formage et le mandrin de formage ne définissent pas entre eux une enveloppe de roulage, de sorte que la déformation axiale du matériau est libre entre ces deux outils.In these figures, the forming wheel and the forming mandrel do not not define a rolling envelope between them, so that the axial deformation of the material is free between these two tools.

Il est alors nécessaire de prévoir des rouleaux de formage axial, à distance de la zone de formage entre la molette et le mandrin, pour obtenir une pièce annulaire de largeur souhaitée.It is then necessary to provide axial forming rollers, at distance from the forming zone between the wheel and the mandrel, to obtain a annular piece of desired width.

Le brevet US-A-3 681 962 ne prévoit d'ailleurs pas de tels rouleaux de formage axial dans ses variantes de machines qui forment le matériau dans une enveloppe de roulage.US-A-3,681,962 does not, moreover, provide for such rollers of axial forming in its machine variants which form the material in a rolling envelope.

Mais, pour revenir aux machines de roulage comportant des rouleaux de contrôle de face, se pose alors, notamment, le problème de l'implantation de ces rouleaux de contrôle de face, alors même que, de cette implantation, peuvent dépendre tant les conditions d'intervention de ces rouleaux de contrôle de face, et, donc, leur efficacité, que l'encombrement de l'ensemble. But, to return to the rolling machines comprising face control rollers, then arises, in particular, the problem of the implantation of these face control rollers, even though, of this implantation, can depend as much on the conditions of intervention of these face control rollers, and, therefore, their effectiveness, as the bulk of all.

La présente invention a d'une manière générale pour objet une disposition qui, de ce double point de vue, donne tout particulièrement satisfaction.The present invention generally relates to a provision which, from this double point of view, gives particularly satisfaction.

De manière plus précise, elle a pour objet une machine de roulage pour pièce annulaire à former, du genre comportant, d'une part, divers organes rotatifs, à savoir, un mandrin de formage, qui est monté rotatif autour d'un premier axe, une molette de formage, qui est montée rotative autour d'un deuxième axe parallèle au premier, et qui est apte à définir, avec le mandrin de formage, une enveloppe de roulage correspondant à la forme finale recherchée pour la section transversale de la pièce annulaire concernée, et deux galets d'appui, qui, montés rotatifs autour d'un troisième axe parallèle aux deux précédents et situé dans le même plan que ceux-ci, s'appuient sur le mandrin de formage de part et d'autre de l'enveloppe de roulage, et, d'autre part, des moyens d'entraínement propres à l'entraínement en rotation de l'un au moins de ces organes rotatifs, cette machine de roulage étant d'une manière générale caractérisée en ce que, deux rouleaux de contrôle de face étant en outre prévus pour intervenir chacun respectivement sur les faces latérales de la pièce annulaire à distance de l'enveloppe de roulage, ces rouleaux de contrôle de face sont disposés entre les galets d'appui, dans le volume hors tout enveloppant le contour extérieur de ceux-ci.More specifically, it relates to a rolling machine for annular part to be formed, of the kind comprising, on the one hand, various members rotary, i.e., a forming mandrel, which is rotatably mounted around a first axis, a forming wheel, which is rotatably mounted around a second axis parallel to the first, and which is capable of defining, with the mandrel of forming, a rolling envelope corresponding to the final shape sought for the cross section of the annular part concerned, and two rollers support, which, rotatably mounted around a third axis parallel to the two previous and located in the same plane as these, are based on the mandrel forming on either side of the rolling envelope, and, on the other hand, drive means specific to the rotational drive of at least one of these rotary members, this rolling machine generally being characterized in that, two face control rollers being further provided to intervene each on the side faces of the part respectively annular at a distance from the rolling envelope, these control rollers face are arranged between the support rollers, in the overall volume enveloping the outer outline of these.

Il en résulte, tout d'abord, que, sans le moindre porte-à-faux, ces deux rouleaux de contrôle de face peuvent avantageusement être tenus à l'une et l'autre de leurs extrémités, au bénéfice de leur efficacité.It follows, first of all, that, without the slightest overhang, these two face control rollers can advantageously be held at one and the other of their ends, for the benefit of their efficiency.

Il en résulte, également, qu'ils ne grèvent avantageusement en rien l'encombrement de l'ensemble.It also follows that they do not strike in any way advantageously the overall size.

Préférentiellement, les axes des rouleaux de contrôle de face s'étendent dans le même plan que celui, dit ci-après par simple commodité plan de roulage, dans lequel s'étendent par ailleurs les axes du mandrin de formage, de la molette de formage, et des galets d'appui. Preferably, the axes of the face control rollers extend in the same plane as that, hereinafter said for convenience rolling plane, in which the axes of the mandrel of forming, the forming wheel, and the support rollers.

Ainsi, le travail de la machine de roulage suivant l'invention se fait dans des conditions de symétrie et de stabilité avantageusement favorables au contrôle de face recherché.Thus, the work of the rolling machine according to the invention is done under conditions of symmetry and stability advantageously favorable to face control sought.

Préférentiellement, également, la machine de roulage suivant l'invention comporte des galets suiveurs, qui, montés rotatifs, encadrent l'enveloppe de roulage pour le maintien, dans le plan de roulage, de l'axe de la pièce annulaire travaillée.Preferably, also, the following rolling machine the invention comprises follower rollers, which, rotatably mounted, frame the rolling envelope for maintaining, in the rolling plane, the axis of the worked annular part.

Ainsi, le travail de cette pièce annulaire se fait avantageusement de manière parfaitement régulière, au bénéfice, encore, du contrôle de face recherché.Thus, the work of this annular part is advantageously done by perfectly regular, again for the benefit of face control research.

Les caractéristiques et avantages de l'invention ressortiront d'ailleurs de la description qui va suivre, à titre d'exemple, en référence aux dessins schématiques annexés sur lesquels :

  • la figure 1 est une vue en perspective de l'ébauche initiale d'une forme simplifiée d'une pièce annulaire susceptible d'être concernée, avant le formage de celle-ci ;
  • la figure 2 est une vue en coupe axiale de cette ébauche, suivant la ligne II-II de la figure 1 ;
  • les figures 3 et 4 sont des vues, qui, chacune respectivement analogues à celles des figures 1 et 2, se rapportent, elles, à la forme simplifiée de la pièce annulaire concernée, après le formage de celle-ci ;
  • la figure 4A est, à échelle différente, une vue partielle en coupe axiale, qui, correspondant pour partie à celle de la figure 4, se rapporte à une pièce annulaire plus constructive, pour un premier type de défaut de celle-ci dans son plan de joint ;
  • la figure 4A' est une vue partielle en coupe axiale analogue à celle de la figure 4A, pour un deuxième type de défaut de la pièce annulaire concernée ;
  • la figure 4B est une vue partielle en coupe axiale analogue à celle des figures 4A, 4A', après correction du défaut grâce au contrôle de face suivant l'invention ;
  • la figure 5 est, avec des écorchés locaux, une vue en perspective de principe de la machine de roulage suivant l'invention ;
  • la figure 6 est, après élimination d'un des galets d'appui qu'elle comporte, une vue en perspective plus constructive de cette machine de roulage ;
  • la figure 7 en est, à échelle différente, une vue partielle en coupe transversale, suivant la ligne VII-VII de la figure 6 ;
  • la figure 8 en est, à échelle supérieure, une vue partielle en coupe axiale, suivant la ligne VIII-VIII de la figure 6 ;
  • la figure 9 en est une autre vue partielle en coupe, suivant la ligne IX-IX de la figure 6 ;
  • la figure 10 est, suivant la flèche X de la figure 6, une vue schématique de principe de la structure à laquelle appartiennent les bras de support que comporte cette machine de roulage ;
  • la figure 11 est une vue schématique qui, analogue à celle de la figure 10, se rapporte à une première variante de réalisation ;
  • la figure 12 est une vue schématique qui, elle aussi analogue à celle de la figure 10, se rapporte à une deuxième variante de réalisation ;
  • la figure 13 est une vue partielle en élévation de cette variante de réalisation, suivant la flèche XIII de la figure 12 ;
  • la figure 14 en est, à échelle supérieure, une vue partielle en coupe, suivant la ligne XIV-XIV de la figure 13.
    • The characteristics and advantages of the invention will become apparent from the description which follows, by way of example, with reference to the appended schematic drawings in which:
  • Figure 1 is a perspective view of the initial blank of a simplified form of an annular part which may be concerned, before the forming thereof;
  • Figure 2 is an axial sectional view of this blank, along the line II-II of Figure 1;
  • Figures 3 and 4 are views, which each similar to those of Figures 1 and 2, respectively, relate to the simplified shape of the annular part concerned, after the forming thereof;
  • FIG. 4A is, on a different scale, a partial view in axial section, which, corresponding in part to that of FIG. 4, relates to a more constructive annular part, for a first type of defect thereof in its plane seal;
  • Figure 4A 'is a partial view in axial section similar to that of Figure 4A, for a second type of defect in the annular part concerned;
  • FIG. 4B is a partial view in axial section similar to that of FIGS. 4A, 4A ', after correction of the defect by means of the face control according to the invention;
  • Figure 5 is, with local cutaway, a perspective view in principle of the rolling machine according to the invention;
  • Figure 6 is, after elimination of one of the support rollers it comprises, a more constructive perspective view of this rolling machine;
  • Figure 7 is a different scale, a partial view in cross section along the line VII-VII of Figure 6;
  • Figure 8 is a larger scale, a partial view in axial section along the line VIII-VIII of Figure 6;
  • Figure 9 is another partial sectional view along the line IX-IX of Figure 6;
  • Figure 10 is, along the arrow X of Figure 6, a schematic view of the principle of the structure to which belong the support arms that includes this rolling machine;
  • Figure 11 is a schematic view which, similar to that of Figure 10, relates to a first embodiment;
  • Figure 12 is a schematic view which, also similar to that of Figure 10, relates to a second alternative embodiment;
  • Figure 13 is a partial elevational view of this alternative embodiment, along arrow XIII of Figure 12;
  • FIG. 14 is, on a larger scale, a partial sectional view along the line XIV-XIV of FIG. 13.

    • Tel qu'illustré sur ces figures, il s'agit, globalement, d'assurer, par roulage, le laminage d'une pièce annulaire 10 à partir d'une ébauche 10'.As illustrated in these figures, it is, overall, to ensure, by rolling, rolling an annular part 10 from a blank 10 '.

    Par exemple, et tel que représenté, la pièce annulaire 10 est destinée à former la bague extérieure d'un roulement à billes. For example, and as shown, the annular part 10 is intended to form the outer ring of a ball bearing.

    Elle comporte, globalement, suivant une section transversale hors tout sensiblement rectangulaire, une face externe 11, une face interne 12, et deux faces latérales 13, avec, annulairement, en creux sur la face interne 12, dans la zone médiane de celle-ci, une gorge 14, de section transversale circulaire.It comprises, overall, along a cross section outside all substantially rectangular, an external face 11, an internal face 12, and two lateral faces 13, with, annularly, recessed on the internal face 12, in the median zone thereof, a groove 14, of cross section circular.

    Dans la forme de réalisation simplifiée représentée sur la figure 3, la face externe 11 et les faces latérales 13 sont droites, et, exception faite de la gorge 14, il en est de même pour la face interne 12.In the simplified embodiment shown in Figure 3, the external face 11 and the lateral faces 13 are straight, and, except for the groove 14, it is the same for the internal face 12.

    Dans la pratique, et en raison même du processus de formage mis en oeuvre pour la réalisation de la gorge 14, tel que décrit ci-après, les faces latérales 13 de la pièce annulaire 10 ne sont pas planes, mais comportent au contraire, en dépouille, deux pans tronconiques qui se rejoignent l'un l'autre suivant un plan de joint T, figures 4A, 4A'.In practice, and due to the training process used to make the groove 14, as described below, the faces 13 of the annular part 10 are not planar, but comprise at contrary, in draft, two frustoconical sections which join one another along a joint plane T, Figures 4A, 4A '.

    Dans ce plan de joint T peuvent se présenter des irrégularités de surface par excès, figure 4A, sous forme de bavures ou autres saillies, ou par défaut, figure 4A', sous forme de criques ou autres dépressions.In this joint plane T, irregularities of surface by excess, FIG. 4A, in the form of burrs or other projections, or by defect, Figure 4A ', in the form of cracks or other depressions.

    L'invention propose, par un contrôle de face, l'élimination de ces irrégularités de surface.The invention proposes, by a face check, the elimination of these surface irregularities.

    Elle conduit, en pratique, à la formation, dans le plan de joint T, d'un méplat régulier, tel que représenté sur la figure 4B.In practice, it leads to the formation, in the joint plane T, of a regular flat, as shown in Figure 4B.

    Quoi qu'il en soit, l'ébauche 10' initiale est, par exemple, et tel que représenté, un simple tronçon de tube, dont la face interne 12' est lisse.Anyway, the initial 10 'draft is, for example, and such that shown, a simple section of tube, the internal face 12 'of which is smooth.

    Il s'agit donc de former la gorge 14 sur cette face interne 12'.It is therefore a question of forming the groove 14 on this internal face 12 '.

    Le laminage mis en oeuvre à cet effet se fait, en pratique, suivant des modalités décrites plus en détail ultérieurement, sur une machine de roulage 15, et il s'accompagne, nécessairement, d'une augmentation du diamètre de la pièce annulaire 10 travaillée.The rolling used for this purpose is, in practice, according to modalities described in more detail later, on a rolling 15, and it is necessarily accompanied by an increase in the diameter of the annular piece 10 worked.

    La machine de roulage 15 suivant l'invention ne sera pas décrite dans tous ses détails ici. The rolling machine 15 according to the invention will not be described in all its details here.

    En particulier, il ne sera pas fait état ici de son bâti, celui-ci relevant de l'homme de métier.In particular, no mention will be made here of its frame, which of the skilled person.

    Ce bâti n'a d'ailleurs pas été représenté sur les figures.This frame has also not been shown in the figures.

    En pratique, seuls seront décrits ici les éléments de la machine de roulage 15 suivant l'invention nécessaires à la compréhension de l'invention.In practice, only the elements of the rolling 15 according to the invention necessary for understanding the invention.

    De manière connue en soi, et tel que schématisé en traits interrompus sur la figure 4 et en traits continus sur la figure 5, la machine de roulage 15 suivant l'invention comporte, globalement, d'une part, divers organes rotatifs 16, 18, 20, à savoir, un mandrin de formage 16, qui est monté rotatif autour d'un premier axe A1, et sur lequel la pièce annulaire 10 à former, ou, plus précisément, l'ébauche 10' de celle-ci, doit être engagée avec jeu, une. molette de formage18, qui est montée rotative autour d'un deuxième axe A2 parallèle au premier, et qui est apte à définir, avec le mandrin de formage 16, une enveloppe de roulage 19, correspondant à la forme finale recherchée pour la section transversale de cette pièce annulaire 10, et deux galets d'appui 20, qui, montés rotatifs autour d'un troisième axe A3 parallèle aux deux précédents et situé dans le même plan P que ceux-ci, dit ici par simple commodité plan de roulage, s'appuient sur le mandrin de formage 16 de part et d'autre de l'enveloppe de roulage 19, et, d'autre part, des moyens d'entraínement E propres à l'entraínement en rotation de l'un au moins de ces organes rotatifs 16, 18, 20.In a manner known per se, and as shown diagrammatically in broken lines in FIG. 4 and in solid lines in FIG. 5, the rolling machine 15 according to the invention comprises, on the one hand, on the one hand, various rotary members 16, 18 , 20, namely, a forming mandrel 16, which is rotatably mounted around a first axis A 1 , and on which the annular part 10 to be formed, or, more precisely, the blank 10 'thereof, must be entered with play, one. forming wheel 18, which is rotatably mounted around a second axis A 2 parallel to the first, and which is capable of defining, with the forming mandrel 16, a rolling envelope 19, corresponding to the final shape sought for the cross section of this annular part 10, and two support rollers 20, which, rotatably mounted around a third axis A 3 parallel to the previous two and located in the same plane P as these, said here for convenience of rolling plane , are based on the forming mandrel 16 on either side of the rolling envelope 19, and, on the other hand, drive means E specific to the drive in rotation of at least one of these rotary members 16, 18, 20.

    En pratique, le mandrin de formage 16 comporte, d'une part, un tronçon médian 21, qui est de section transversale réduite, et sur lequel fait saillie annulairement une nervure dûment profilée 22 pour le formage de la gorge 14, et, d'autre part, deux tronçons latéraux 23, qui sont de section transversale plus grande et sur lesquels portent les galets d'appui 20.In practice, the forming mandrel 16 comprises, on the one hand, a median section 21, which is of reduced cross section, and on which annularly protruding a duly profiled rib 22 for forming the groove 14, and, on the other hand, two lateral sections 23, which are of section larger transverse and on which bear the support rollers 20.

    La molette de formage18 comporte, elle-même, un tronçon médian 24, qui est de section transversale réduite, et deux tronçons latéraux 25, qui sont de section transversale plus grande, pour contenir le fluage axial de la pièce annulaire 10. The forming wheel 18 itself has a middle section 24, which is of reduced cross section, and two lateral sections 25, which are of larger cross section, to contain the axial creep of the annular part 10.

    Tel que représenté à la figure 5, la machine de roulage 15 suivant l'invention comporte, également, de part et d'autre du mandrin de formage 16, deux galets suiveurs 26, qui, montés rotatifs autour d'axes A5, encadrent l'enveloppe de roulage 19.As shown in FIG. 5, the rolling machine 15 according to the invention also comprises, on either side of the forming mandrel 16, two follower rollers 26, which, mounted to rotate about axes A 5 , frame the rolling envelope 19.

    Ces galets suiveurs 26 interviennent sur la face externe 11 de la pièce annulaire 10, pour en contrôler la rotondité et la symétrie et en reprendre d'éventuelles déformations, et il en résulte que, au cours du formage, l'axe A4 de cette pièce annulaire 10 reste dans le plan de roulage P des axes A1, ,A2, A3.These follower rollers 26 operate on the external face 11 of the annular part 10, in order to control the roundness and the symmetry and to take up any deformations thereof, and it follows that, during forming, the axis A 4 of this annular part 10 remains in the rolling plane P of the axes A 1 ,, A 2 , A 3 .

    Les axes A5 des galets suiveurs 26 sont donc à l'écart de ce plan de roulage P, de part et d'autre de celui-ci.The axes A 5 of the follower rollers 26 are therefore away from this rolling plane P, on either side of it.

    Ces axes A5 sont sensiblement parallèles aux axes A1, A2, A3 précédents, mais l'un d'eux, au moins, peut cependant être avantageusement légèrement incliné par rapport à ceux-ci, pour compenser d'éventuels défauts de conicité extérieure.These axes A 5 are substantially parallel to the axes A 1 , A 2 , A 3 above , but one of them, at least, can however be advantageously slightly inclined with respect to these, to compensate for possible defects in external taper.

    Préférentiellement, les galets suiveurs 26 sont disposés de manière parfaitement symétrique par rapport au plan de roulage P, en étant pour ce faire dûment maintenus par des moyens de support, connus en eux-mêmes et non représentés.Preferably, the follower rollers 26 are arranged so perfectly symmetrical with respect to the rolling plane P, being for this do duly maintained by means of support, known in themselves and not shown.

    Ils permettent ainsi de maintenir dans le plan de roulage P l'axe A4 de la pièce annulaire 10.They thus make it possible to maintain in the rolling plane P the axis A 4 of the annular part 10.

    Les moyens d'entraínement E, qui n'ont été que schématiquement représentés en traits interrompus sur la figure 5, sont eux aussi de type connu.The drive means E, which have only been schematically shown in broken lines in Figure 5, are also of known type.

    Il s'agit, en pratique, de moyens de motorisation mettant en oeuvre un quelconque moteur.In practice, these are motorization means implementing any engine.

    Tel que schématisé sur la figure 5, les moyens d'entraínement E sont appliqués à la molette de formage 18 et aux galets d'appui 20.As shown schematically in Figure 5, the drive means E are applied to the forming wheel 18 and to the support rollers 20.

    Mais toute autre configuration d'entraínement est envisageable, et, en toute hypothèse, le mandrin de formage 16, la molette de formage 18, les galets d'appui 20 et les galets suiveurs 26 tournent évidemment en synchronisme.But any other training configuration is possible, and, in any event, the forming mandrel 16, the forming wheel 18, the support rollers 20 and the follower rollers 26 obviously rotate in synchronism.

    La machine de roulage 15 suivant l'invention comporte, enfin, un palpeur 27, pour le contrôle du diamètre de la pièce annulaire 10.The rolling machine 15 according to the invention finally comprises a probe 27, for checking the diameter of the annular part 10.

    Ce palpeur 27 intervient entre les galets d'appui 20.This probe 27 intervenes between the support rollers 20.

    Suivant l'invention, deux rouleaux de contrôle de face 29 étant en outre prévus pour intervenir chacun respectivement sur les faces latérales 13 de la pièce annulaire 10 à distance de l'enveloppe de roulage 19, tel que représenté schématiquement à la figure 5, ces rouleaux de contrôle de face 29 sont disposés entre les galets d'appui 20, dans le volume hors tout enveloppant le contour extérieur de ceux-ci.According to the invention, two face control rollers 29 being in additionally provided to each intervene respectively on the lateral faces 13 of the annular part 10 at a distance from the rolling envelope 19, such as shown schematically in Figure 5, these face control rollers 29 are arranged between the support rollers 20, in the overall volume enveloping the outer outline of these.

    Préférentiellement, et cela est le cas dans les formes de réalisation représentées, les axes A6 des rouleaux de contrôle de face 29 s'étendent dans le même plan que celui dans lequel s'étendent par ailleurs les axes A1 du mandrin de formage 16, A2 de la molette de formage 18, et A3 des galets d'appui 20, c'est-à-dire dans le plan de roulage P.Preferably, and this is the case in the embodiments shown, the axes A 6 of the face control rollers 29 extend in the same plane as that in which the axes A 1 of the forming mandrel 16 also extend. , A 2 of the forming wheel 18, and A 3 of the support rollers 20, that is to say in the rolling plane P.

    Il résulte de ce qui précède que les rouleaux de contrôle de face 29 interviennent par leurs génératrices sur les faces latérales 13 de la pièce annulaire 10, et qu'ils s'étendent sensiblement radialement par rapport à celle-ci.It follows from the above that the face control rollers 29 intervene by their generators on the lateral faces 13 of the part annular 10, and that they extend substantially radially with respect to it.

    S'étendant, en pratique, de part et d'autre de la section transversale travaillée de la pièce annulaire 10, ils ont une longueur I relativement importante, ce qui leur permet, d'une part, de se satisfaire de l'augmentation de diamètre de la pièce annulaire 10 au cours de son formage, et, d'autre part, de convenir avantageusement à des pièces annulaires 10 de diamètres différents.Extending, in practice, on either side of the cross section worked from the annular part 10, they have a length I relatively important, which allows them, on the one hand, to be satisfied with the increase in diameter of the annular part 10 during its forming, and, on the other part, to advantageously be suitable for annular parts 10 of diameters different.

    Dans la forme de réalisation plus particulièrement représentée sur les figures 1 à 10, les rouleaux de contrôle de face 29 sont cylindriques, et, au moins en fin de travail, leurs axes A6 sont parallèles l'un à l'autre. In the embodiment more particularly shown in Figures 1 to 10, the face control rollers 29 are cylindrical, and, at least at the end of work, their axes A 6 are parallel to each other.

    Préférentiellement, et tel que représenté, leur diamètre d est inférieur à leur longueur I.Preferably, and as shown, their diameter d is less than their length I.

    Par exemple, ce diamètre d est inférieur à au moins la moitié de la longueur I.For example, this diameter d is less than at least half the length I.

    Dans la forme de réalisation représentée sur les figures 1 à 10, il est sensiblement égal au tiers de cette longueur I.In the embodiment shown in Figures 1 to 10, it is substantially equal to a third of this length I.

    Plus généralement, le diamètre d des rouleaux de contrôle de face 29 est préférentiellement choisi le plus faible possible pour que ces rouleaux de contrôle de face 29 soient aussi pénétrants que possible sous un faible effort.More generally, the diameter d of the face control rollers 29 is preferably chosen to be as low as possible so that these rollers face control 29 are as penetrating as possible with little effort.

    Préférentiellement, et cela est le cas dans les formes de réalisation représentées, les rouleaux de contrôle de face 29 sont chacun respectivement au moins en partie disposés à l'intérieur même des galets d'appui 20, chacun de ces galets d'appui 20 comportant, en creux, sur sa face interne 30, et en retrait par rapport à sa périphérie 31, un évidement 32 dans lequel le rouleau de contrôle de face 29 correspondant est au moins en partie engagé.Preferably, and this is the case in the embodiments shown, the face control rollers 29 are each respectively at least partly arranged inside the support rollers 20, each of these support rollers 20 comprising, recessed, on its internal face 30, and withdrawal from its periphery 31, a recess 32 in which the roller corresponding face control 29 is at least partially engaged.

    Ainsi, les galets d'appui 20 peuvent s'appuyer sur le mandrin de formage 16 au plus près de l'enveloppe de roulage 19, ce qui permet un soutien efficace de ce mandrin de formage 16 par ces galets d'appui 20 et limite donc sa flexion.Thus, the support rollers 20 can rest on the mandrel of forming 16 as close as possible to the rolling envelope 19, which allows a effective support of this forming mandrel 16 by these support rollers 20 and therefore limits its bending.

    Par exemple, et tel que représenté, l'évidement 32 que comporte ainsi chacun des galets d'appui 20 s'étend circulairement tout autour de son axe A3.For example, and as shown, the recess 32 which each of the support rollers 20 thus comprises extends circularly all around its axis A 3 .

    Chacun des galets d'appui 20 comporte ainsi un flasque 20a, qui, à sa périphérie 31, présente annulairement, en saillie vers l'autre, un rebord 20b, et qui, dans sa zone centrale, présente, axialement, en saillie dans le sens opposé au précédent, une partie épaisse 20c formant moyeu.Each of the support rollers 20 thus comprises a flange 20a, which, at its periphery 31, annularly, projecting towards the other, a flange 20b, and which, in its central area, has, axially, projecting in the direction opposite the previous one, a thick part 20c forming a hub.

    En pratique, les rouleaux de contrôle de face 29 sont libres en rotation.In practice, the face control rollers 29 are free in rotation.

    Dans les formes de réalisation représentées, chacun de ces rouleaux de contrôle de face 29 est monté rotatif sur un bras de support 34 monté pivotant autour d'un axe principal de pivotement A7 orthogonal à l'axe A3 des galets d'appui 20.In the embodiments shown, each of these face control rollers 29 is rotatably mounted on a support arm 34 pivotally mounted about a main pivot axis A 7 orthogonal to the axis A 3 of the support rollers 20 .

    Préférentiellement, et cela est le cas dans ces formes de réalisation, chacun des bras de support 34 que comporte ainsi la machine de roulage 15 suivant l'invention s'étend globalement diamétralement par rapport aux galets d'appui 20 et présente un évidement central 35, de contour circulaire, pour le passage, notamment, de l'arbre de support 36 de ces galets d'appui 20.Preferably, and this is the case in these embodiments, each of the support arms 34 which thus comprises the rolling machine 15 according to the invention extends generally diametrically with respect to the rollers support 20 and has a central recess 35, of circular outline, for the passage, in particular, of the support shaft 36 of these support rollers 20.

    Cet arbre de support 36 a été schématisé en traits interrompus sur la figure 8.This support shaft 36 has been shown diagrammatically in broken lines on Figure 8.

    Préférentiellement, également, et cela est également le cas dans les formes de réalisation représentées, l'axe principal de pivotement A7 de chacun des bras de support 34 recoupe l'axe A3 des galets d'appui 20, tel que schématisé en traits interrompus sur la figure 7.Preferably also, and this is also the case in the embodiments shown, the main pivot axis A 7 of each of the support arms 34 intersects the axis A 3 of the support rollers 20, as shown schematically in lines interrupted in Figure 7.

    Globalement, les deux bras de support 34, qui sont de configuration analogue, se présentent chacun sous la forme d'un flasque, avec une partie médiane annulaire 37, autour de leur évidement central 35, et, en positions diamétralement opposées l'une par rapport à l'autre, deux extensions radiales 38 à la faveur de l'une desquelles intervient le rouleau de contrôle de face 29 correspondant.Overall, the two support arms 34, which are of configuration analogous, each in the form of a flange, with a part median annular 37, around their central recess 35, and, in positions diametrically opposite to each other, two radial extensions 38 in favor of one of which the front control roller intervenes 29 corresponding.

    Au niveau de leur axe principal de pivotement A7, les bras de support 34 sont reliés l'un à l'autre, de manière articulée, par au moins une bride 39, dite ici par simple commodité bride centrale.At their main pivot axis A 7 , the support arms 34 are connected to each other, in an articulated manner, by at least one flange 39, here called for simple convenience central flange.

    Dans les formes de réalisation représentées, deux brides centrales 39 sont prévues, qui, parallèles l'une à l'autre, s'étendent chacune respectivement en positions diamétralement opposées l'une par rapport à l'autre et recoupent l'une et l'autre l'axe principal de pivotement A7 de chacun des bras de support 34.In the embodiments shown, two central flanges 39 are provided, which, parallel to one another, each extend respectively in diametrically opposite positions relative to each other and intersect one and the the other main pivot axis A 7 of each of the support arms 34.

    Dans les formes de réalisations représentées, l'axe principal de pivotement A7 de chacun des bras de support 34 est matérialisé par deux tourillons 40, qui sont dirigés, radialement, vers l'axe A3 des galets d'appui 20, et qui, directement ou indirectement, prennent appui, radialement, en positions diamétralement opposées l'un par rapport à l'autre, sur un manchon 41 centré sur l'axe A3 des galets d'appui 20.In the embodiments shown, the main pivot axis A 7 of each of the support arms 34 is materialized by two pins 40, which are directed, radially, towards the axis A 3 of the support rollers 20, and which , directly or indirectly, bear, radially, in diametrically opposite positions with respect to each other, on a sleeve 41 centered on the axis A 3 of the support rollers 20.

    Par exemple, et tel que représenté, ce manchon 41 est en deux parties, à savoir, une partie interne 41A, qui, engagée sur l'arbre de support 36 des galets d'appui 20, et donc solidaire en rotation de celui-ci, est en contact axial avec le galet d'appui 20 correspondant, et une partie externe 41B, qui, formant palier, entoure la partie interne 41A, avec interposition de moyens de roulement 42, et sur laquelle portent les tourillons 40.For example, and as shown, this sleeve 41 is in two parts, namely, an internal part 41A, which, engaged on the support shaft 36 of the support rollers 20, and therefore integral in rotation thereof, is in axial contact with the corresponding support roller 20, and an external part 41B, which, forming a bearing, surrounds the internal part 41A, with the interposition of rolling means 42, and on which the pins 40 bear.

    Quoi qu'il en soit, il y a, annulairement, un jeu radial J entre les bras de support 34 et le manchon 41 qu'ils entourent, et, plus précisément, entre l'évidement central 35 de ces bras de support 34 et la partie externe 41B de ce manchon 41.Anyway, there is, annularly, a radial clearance J between the arms support 34 and the sleeve 41 which they surround, and, more precisely, between the central recess 35 of these support arms 34 and the external part 41B of this sleeve 41.

    Dans les formes de réalisation représentées, les tourillons 40 portent sur le manchon 41 par l'intermédiaire de paliers 43, figure 7, et, pour l'appui de ceux-ci, la partie externe 41B de ce manchon 41 présente, en positions diamétralement opposées l'un par rapport à l'autre, deux méplats 44.In the embodiments shown, the pins 40 carry on the sleeve 41 by means of bearings 43, FIG. 7, and, for the support of these, the external part 41B of this sleeve 41 has, in positions diametrically opposite to each other, two flats 44.

    La forme de réalisation plus particulièrement représentée sur les figures 1 à 10 concerne le cas où, le contrôle de face à effectuer devant intervenir de manière symétrique et équilibrée sur l'une et l'autre des faces latérales 13 de la pièce annulaire 10, aucune de ces faces latérales 13 ne peut être prise comme face de référence pour l'ensemble.The embodiment more particularly represented on the Figures 1 to 10 concern the case where the front control to be performed in front work symmetrically and balanced on both sides side 13 of the annular part 10, none of these side faces 13 can be taken as the reference face for the assembly.

    Dans ce cas, les bras de support 34 constituent, avec les brides centrales 39 qui les relient, une structure en forme de pince, et, à leur extrémité opposée aux rouleaux de contrôle de face 29, ils sont conjointement soumis à un dispositif d'écartement 45.In this case, the support arms 34 constitute, with the flanges 39 connecting them, a clamp-like structure, and, at their opposite end to the face control rollers 29, they are jointly subjected to a spacer 45.

    En pratique, ce dispositif d'écartement 45 intervient entre les bras de support 34, et, plus précisément, entre les extension radiales 38 correspondantes de ceux-ci. In practice, this spacing device 45 intervenes between the arms support 34, and more precisely between the radial extensions 38 corresponding to these.

    Dans la forme de réalisation représentée, ce dispositif d'écartement 45 met en oeuvre un coin 46, qui, sous le contrôle d'un dispositif de commande 47, et tel que schématisé par la double flèche F1 sur la figure 7, est monté mobile dans un plan perpendiculaire à l'axe A3 des galets d'appui 20, et, donc, perpendiculaire au plan de roulage P, de préférence de manière micrométrique.In the embodiment shown, this spacing device 45 implements a wedge 46, which, under the control of a control device 47, and as shown diagrammatically by the double arrow F 1 in FIG. 7, is mounted movable in a plane perpendicular to the axis A 3 of the support rollers 20, and therefore perpendicular to the rolling plane P, preferably micrometrically.

    Plus précisément, dans la forme de réalisation représentée, le coin 46 intervient entre deux blocs 48 dont la surface opposée est hémicylindrique, avec des génératrices parallèles à l'axe principal de pivotement A7 des bras de support 34, et sur lesquels ces bras de support 34 sont chacun respectivement articulés.More specifically, in the embodiment shown, the wedge 46 intervenes between two blocks 48 whose opposite surface is semi-cylindrical, with generatrices parallel to the main pivot axis A 7 of the support arms 34, and on which these arms support 34 are each articulated respectively.

    Deux ressorts de rappel 49, qui prennent appui sur un même tirant 50 traversant de part en part les bras de support 34, maintiennent en permanence élastiquement ces bras de support 34 au contact des blocs 48, figure 8.Two return springs 49, which bear on the same tie rod 50 passing right through the support arms 34, keep in permanently these support arms 34 in elastic contact with the blocks 48, figure 8.

    Préférentiellement, et cela est le cas dans les formes de réalisation représentées, les deux bras de support 34 sont en outre conjointement attelés à un dispositif d'aricrage 52 propre à les bloquer en rotation par rapport à l'axe A3 des galets d'appui 20, figure 7.Preferably, and this is the case in the embodiments shown, the two support arms 34 are also jointly coupled to an anchoring device 52 capable of blocking them in rotation relative to the axis A 3 of the rollers of support 20, figure 7.

    Enfin, dans la forme de réalisation plus particulièrement représentée sur les figures 1 à 10, chacun des rouleaux de contrôle de face 29 est directement monté rotatif sur son bras de support 34.Finally, in the more particularly illustrated embodiment in FIGS. 1 to 10, each of the face control rollers 29 is directly rotatably mounted on its support arm 34.

    Plus précisément, dans cette forme de réalisation, chacun des rouleaux de contrôle de face 29 s'étend dans un évidement 53 de son bras de support 34 qui traverse de part en part celui-ci.More specifically, in this embodiment, each of the face control rollers 29 extends into a recess 53 in its arm support 34 which runs right through it.

    Plus précisément, encore, cet évidement 53 affecte, à la manière d'une fente, l'extension radiale 38 correspondante de ce bras de support 34, et, à l'extrémité de cette extension radiale 38, il est fermé par une bride de centrage 55. More precisely, still, this recess 53 affects, in the manner a slot, the corresponding radial extension 38 of this support arm 34, and, at the end of this radial extension 38, it is closed by a flange of centering 55.

    Ainsi, l'arbre 56 d'un tel rouleau de contrôle de face 29 peut être avantageusement soutenu à l'une et l'autre de ses extrémités, tel que schématisé en traits interrompus sur la figure 7, et tel que représenté en traits continus sur la figure 8.Thus, the shaft 56 of such a face control roller 29 can be advantageously supported at either end, such that shown schematically in broken lines in Figure 7, and as shown in lines shown in Figure 8.

    Préférentiellement, des moyens de butée sont par ailleurs prévus pour assurer un arrêt en rotation des bras de support 34 des rouleaux de contrôle de face 29 par rapport à leur axe A3, et permettre ainsi le maintien des axes A6 des rouleaux de contrôle de face 29 dans le plan de roulage P.Preferably, stop means are also provided to ensure that the support arms 34 of the face control rollers 29 stop rotating with respect to their axis A 3 , and thus allow the axes A 6 of the control rollers to be maintained. side 29 in the rolling plane P.

    Relevant de l'homme de métier, ces moyens de butée n'ont pas été représentés, et ils ne seront pas décrits ici.Reporting to the skilled person, these stop means have not been shown, and they will not be described here.

    En pratique, ces moyens de butée résultent de la mise en oeuvre même du dispositif de commande 47 et appartiennent donc à celui-ci.In practice, these abutment means result from the implementation even of the control device 47 and therefore belong to it.

    En service, les rouleaux de contrôle de face 29 ne sont mis en action qu'en temps opportun au cours du formage, suivant le diamètre de la pièce annulaire 10 à travailler.In operation, the face control rollers 29 are only put in timely action during forming, depending on the diameter of the annular part 10 to be worked.

    Pour ce faire, le coin 46 est alors enfoncé entre les extensions 38 des bras de support 34 opposées aux rouleaux de contrôle de face 29.To do this, the corner 46 is then pressed between the extensions 38 support arms 34 opposite the face control rollers 29.

    Il en résulte un écartement relatif, à ce niveau, de ces bras de support 34, suivant la double flèche F2 de la figure 10, et, donc, suivant des flèches F3 de cette figure 10, un pivotement de ces bras de support 34 autour de leur axe principal de pivotement A7 qui conduit les rouleaux de contrôle de face 29 qu'ils portent à se rapprocher l'un de l'autre.This results in a relative spacing, at this level, of these support arms 34, according to the double arrow F 2 of FIG. 10, and, therefore, according to arrows F 3 of this FIG. 10, a pivoting of these support arms 34 around their main pivot axis A 7 which leads the face control rollers 29 which they carry to approach each other.

    Eu égard aux efforts importants alors développés, la flexion des bras de support 34 suffit le plus souvent à compenser l'inclinaison qui est alors la leur.In view of the significant efforts then developed, the flexion of the arms support 34 is most often sufficient to compensate for the inclination which is then the their.

    Si désiré, cette inclinaison peut également être compensée en mettant en oeuvre des rouleaux de contrôle de face 29 coniques, comme schématisé à la figure 11. If desired, this inclination can also be compensated for by using tapered front control rollers 29, as shown schematically in Figure 11.

    Sur cette figure 11, la conicité de ces rouleaux de contrôle de face 29 a été volontairement très exagérée, pour la rendre visible et faciliter la compréhension.In this figure 11, the taper of these face control rollers 29 was deliberately exaggerated, to make it visible and to facilitate comprehension.

    Quoi qu'il en soit, les brides centrales 39 reliant l'un à l'autre les deux bras de support 34 servent avantageusement à reprendre à ce niveau les réactions radiales de laminage et soulagent ainsi avantageusement les moyens de roulement 42 internes au manchon 41.Anyway, the central flanges 39 connecting to each other the two support arms 34 advantageously serve to take up at this level the radial rolling reactions and thus advantageously relieve the means bearing 42 internal to the sleeve 41.

    Dès lors, ces moyens de roulement 42 supportent uniquement les réactions tangentielles de laminage, qui, elles, demeurent faibles.Consequently, these rolling means 42 only support the tangential rolling reactions, which remain weak.

    Du fait que les axes A6 des rouleaux de contrôle de face 29 s'étendent dans le plan de roulage P, ils recoupent en permanence l'axe A4 de la pièce annulaire 10 en cours de formage, malgré l'évolution en diamètre de celle-ci, ce qui, corollairement avec l'action des galets suiveurs 26, est avantageusement garant d'un maintien de la configuration circulaire de cette pièce annulaire 10.Because the axes A 6 of the face control rollers 29 extend in the rolling plane P, they permanently intersect the axis A 4 of the annular part 10 during forming, despite the change in diameter of this, which, as a corollary with the action of the follower rollers 26, is advantageously a guarantee of maintaining the circular configuration of this annular part 10.

    Bien que s'apparentant à un laminage de surface, le contrôle de face assuré suivant l'invention n'entraíne en pratique aucun fluage sensible de matière.Although similar to surface lamination, face control assured according to the invention does not in practice cause any sensitive creep of material.

    La forme de réalisation plus particulièrement représentée sur les figures 12 à 14 concerne le cas où, le contrôle de face à effectuer devant intervenir de manière dissymétrique sur les faces latérales 13 de la pièce annulaire 10, il est possible de choisir l'une de ces faces latérales 13 comme face de référence pour l'ensemble.The embodiment more particularly represented on the Figures 12 to 14 concern the case where the front control to be performed in front work asymmetrically on the side faces 13 of the part annular 10, it is possible to choose one of these lateral faces 13 as reference face for the assembly.

    Dans ce cas, et tel que schématisé sur la figure 12, les bras de support 34 sont reliés, l'un à l'autre, à distance de leur axe principal de pivotement A7, et de manière articulée, suivant chacun un axe secondaire de pivotement A'7 parallèle à l'axe principal de pivotement A7 précédent, par au moins une bride 57, dite ci-après par simple commodité bride d'extrémité, qui est parallèle aux brides centrales 39, et qui est de même longueur que ces dernières. In this case, and as shown diagrammatically in FIG. 12, the support arms 34 are connected, to each other, at a distance from their main pivot axis A 7 , and in an articulated manner, each along a secondary axis. pivot A ' 7 parallel to the main pivot axis A 7 above , by at least one flange 57, hereinafter called for simple convenience end flange, which is parallel to the central flanges 39, and which is the same length than these.

    Par exemple, seule une telle bride d'extrémité 57 est prévue.For example, only such an end flange 57 is provided.

    Quoi qu'il en soit, elle intervient sur les bras de support 34 du côté des brides centrales 39 opposé aux rouleaux de contrôle de face 29.Anyway, it acts on the support arms 34 on the side central flanges 39 opposite the face control rollers 29.

    Quoi qu'il en soit, également, les bras de support 34 constituent, alors, avec les brides 39 et 57 qui les relient, une structure en forme de parallélogramme déformable, et, tel que schématisé par une double flèche F4 sur la figure 12, l'ensemble est soumis à un dispositif de commande 58 propre à en permettre un contrôle de position par rapport à la pièce annulaire 10 à travailler, par rotation autour des axes de pivotement A7, A'7, ce qui, l'un des bras de support 34 étant par exemple pris comme référence, permet de travailler préférentiellement l'une des faces latérales 13 de cette pièce annulaire 10 plutôt que l'autre de celles-ci.Anyway, also, the support arms 34 then constitute, with the flanges 39 and 57 which connect them, a structure in the form of a deformable parallelogram, and, as shown diagrammatically by a double arrow F 4 in the figure. 12, the assembly is subjected to a control device 58 capable of allowing its position control with respect to the annular part 10 to be worked, by rotation around the pivot axes A 7 , A ' 7 , which, the one of the support arms 34 being for example taken as a reference, makes it possible to work preferentially one of the lateral faces 13 of this annular part 10 rather than the other of these.

    Dans la forme de réalisation représentée, figure 14, chacun des rouleaux de contrôle de face 29 est monté rotatif sur son bras de support 34 par l'intermédiaire d'un support de rouleau 59 monté basculant sur ce bras de support 34 autour d'un axe de basculement A8, qui, parallèle à celui A6 de ce rouleau de contrôle de face 29, s'étend à distance de celui-ci.In the embodiment shown, FIG. 14, each of the face control rollers 29 is rotatably mounted on its support arm 34 by means of a roller support 59 pivotally mounted on this support arm 34 around a tilting axis A 8 , which, parallel to that A 6 of this face control roller 29, extends at a distance therefrom.

    En outre, dans cette forme de réalisation, le support de rouleau 59 est soumis à deux vérins 60, 61, qui s'étendent chacun respectivement de part et d'autre de son axe de basculement A8, et qui prennent appui sur le bras de support 34.In addition, in this embodiment, the roller support 59 is subjected to two jacks 60, 61, which each extend respectively on either side of its pivot axis A 8 , and which bear on the arm support 34.

    Préférentiellement, et cela est le cas dans la forme de réalisation représentée, ces vérins 60, 61 sont intégrés à ce bras de support 34.Preferably, and this is the case in the embodiment shown, these jacks 60, 61 are integrated into this support arm 34.

    Pour le reste, les dispositions sont du même type que les précédentes.For the rest, the provisions are of the same type as the preceding.

    En service, le rapprochement relatif des rouleaux de contrôle de face 29 peut être assuré en agissant en conséquence sur le dispositif de commande 58 et/ou sur les vérins 60, 61.In service, the relative alignment of the face control rollers 29 can be ensured by acting accordingly on the control device 58 and / or on the cylinders 60, 61.

    Des pressions différentes dans chacun des vérins 60 permettent d'obtenir pour l'un des rouleaux de contrôle de face 29 un niveau de pression supérieur à celui de l'autre, et, par là, de respecter la relation de dissymétrie à satisfaire.Different pressures in each of the cylinders 60 allow obtain a pressure level for one of the face control rollers 29 higher than that of the other, and thereby respect the asymmetry relationship to satisfied.

    En particulier, au lieu de se faire perpendiculairement à l'axe de la pièce annulaire travaillée, le laminage de surface des faces latérales de celle-ci peut se faire en biais par rapport à ce axe, quelle que soit la nature, cylindrique ou conique, des rouleaux de contrôle de face mis en oeuvre.In particular, instead of being made perpendicular to the axis of the worked annular part, the surface lamination of the lateral faces thereof can be done at an angle to this axis, whatever the nature, cylindrical or conical, face control rollers used.

    En outre, au lieu d'être cylindriques ou coniques, ces rouleaux de contrôle de face peuvent éventuellement avoir une surface extérieure évolutive si désiré.In addition, instead of being cylindrical or conical, these rolls of face control can optionally have a scalable exterior surface if desired.

    Par ailleurs, si la présente invention a été plus particulièrement décrite en référence à la bague extérieure d'un roulement, il va de soi qu'elle s'applique aussi bien à la bague intérieure d'un tel roulement.Furthermore, if the present invention has been more particularly described with reference to the outer ring of a bearing, it goes without saying that applies equally well to the inner ring of such a bearing.

    C'est, dans ce cas, la face externe de cette bague qui comporte une gorge, et la molette de formage et le mandrin de formage ont à leur tour des formes conjuguées inversées.It is, in this case, the external face of this ring which comprises a groove, and the forming wheel and the forming mandrel in turn have inverted conjugate forms.

    Claims (27)

    1. Rolling machine for an annular workpiece to be formed, of the type comprising, on the one hand, various rotating components (16, 18, 20), namely a forming mandrel (16) which is mounted so as to rotate about a first axis (A1), a forming pulley-shaped wheel (18) which is mounted so as to rotate about a second axis (A2) parallel to the first and which can define, with the forming mandrel (16) a rolling envelope (19) corresponding to the final desired form for the transverse section of the annular workpiece (10) concerned, and two supporting rollers (20) which, mounted so as to rotate about a third axis (A3) parallel to the two preceding axes and situated in the same plane (P) as these, hereinafter called the rolling plane, rest on the forming mandrel (16) either side of the rolling envelope (19) and, on the other hand, drive means (E) capable of driving at least one of the rotating components (16, 18, 20) in rotation, characterized in that two face control rollers (29) are additionally provided, each to act respectively on the lateral faces (13) of the annular workpiece (10) away from the rolling envelope (19), these face control rollers (29) being positioned between the supporting rollers (20) in the overall volume enveloping the outer contour of these.
    2. Rolling machine according to claim 1, characterized in that it includes two follower rollers (26) which, mounted rotatingly, frame the rolling envelope (19) and act on the outer face (11) of the annular workpiece (10).
    3. Rolling machine according to claim 2, characterized in that the follower rollers (26) are positioned in a symmetrical manner with respect to the rolling plane (P).
    4. Rolling machine according to either of claims 2 or 3, characterized in that the axes (A5) of the follower rollers (26) are substantially parallel to the preceding axes (A1, A2, A3), it being possible for at least one of them to be slightly inclined with respect to these.
    5. Rolling machine according to any one of claims 1 to 4, characterized in that the axes (A6) of the face control rollers (29) extend in the rolling plane (P).
    6. Rolling machine according to any one of claims 1 to 5, characterized in that the face control rollers (29) are cylindrical and their axes (A6) are parallel to each other.
    7. Rolling machine according to claim 6, characterized in that the diameter (d) of the face control rollers (29) is less than their length (1).
    8. Rolling machine according to claim 7, characterized in that the diameter (d) of the face control rollers (29) is less than at least half their length (1).
    9. Rolling machine according to any one of claims 1 to 5, characterized in that the face control rollers (29) are conical.
    10. Rolling machine according to any one of claims 1 to 9, characterized in that each of the face control rollers (29) is respectively at least partly positioned actually inside the supporting rollers (20), each of these supporting rollers (20) including, hollowed out on its inner surface (30) and set back with respect to its periphery (31), a recess (32) in which the corresponding face control roller (29) is at least partly engaged.
    11. Rolling machine according to claim 10, characterized in that the recess (32) which includes each of the supporting rollers (20) extends circularly around all its axis (A3).
    12. Rolling machine according to any one of claims 1 to 11, characterized in that the face control rollers (29) are free in rotation.
    13. Rolling machine according to any one of claims 1 to 12, characterized in that each of the face control rollers (29) is mounted so as to rotate on a supporting arm (34) about a principal pivot axis (A7) orthogonal to the axis (A3) of the supporting rollers (20).
    14. Rolling machine according to claim 13, characterized in that each of the supporting arms (34) included therein extends diametrically overall with respect to the supporting rollers (20) and has a central recess (35) for the passage of the supporting shaft (36) of these supporting rollers (20).
    15. Rolling machine according to claim 14, characterized in that the principal pivot axis (A7) of each of the supporting arms (34) intersects the axis (A3) of the supporting rollers (20).
    16. Rolling machine according to claim 15, characterized in that, at the level of their principal pivot axis (A7), the supporting arms (34) are linked to each other in a hinged manner by at least one strap (39), referred to as the central strap.
    17. Rolling machine according to either of claims 15 or 16, characterized in that the principal pivot axis (A7) of each of the supporting arms (34) is materialised by two pins (40) which, directly or indirectly, rest radially in diametrically opposed positions to each other on a sleeve (41) centred on the axis (A3) of the supporting rollers (20).
    18. Rolling machine according to claim 17, characterized in that a radial play (J) exists annularly between the supporting arms (34) and the sleeve (41).
    19. Rolling machine according to any one of claims 16 to 18, characterized in that, at their opposite end to the face control rollers (29), the supporting arms (34) are jointly subjected to the action of a separating device (45) and that they constitute, together with the central strap or straps that connect them, a structure in the form of a clamp.
    20. Rolling machine according to claim 19, characterized in that the separating device (45) operates between the supporting arms (34) and employs a wedge (46) movably mounted in a plane perpendicular to the axis (A3) of the supporting rollers (20).
    21. Rolling machine according to any one of claims 16 to 18, characterized in that, at a distance from their principal pivot axis (A7), the supporting arms (34) are linked to each other in a hinged manner by at least one strap (57), here referred to as an end strap, which is parallel to the central strap or straps (39) and which, having the same length as the latter, constitutes with the assembly a structure in the form of a deformable parallelogram, and at least one of the straps (39,57) is subjected to the action of a control device (58) enabling the position of the assembly to be controlled with respect to the annular workpiece (10) to be worked.
    22. Rolling machine according to any one of claims 13 to 21, characterized in that each of the face control rollers (29) is directly mounted so as to rotate on the supporting arms (34).
    23. Rolling machine according to claim 22, characterized in that each of the face control rollers (29) extends into a recess (53) in its supporting arm (34) which passes right through the latter.
    24. Rolling machine according to any one of claims 19 to 21, characterized in that each of the face control rollers (29) is mounted so as to rotate on its supporting arm (34) by means of a roller support (59) mounted so as to swivel on the supporting arm (34) about a swivel axis (A8) which, parallel to that (A6) of the face control roller (29), extends away from the latter.
    25. Rolling machine according to claim 24, characterized in that the roller support (59) is subjected to two jacks (60, 61), each of which extends respectively either side of its swivel axis (A8) and which rest on the supporting arms (34).
    26. Rolling machine according to claim 25, characterized in that the jacks (60,61) are incorporated in the supporting arm (34).
    27. Rolling machine according to any one of claims 13 to 26, characterized in that a stop device is provided to ensure that the supporting arm (34) of the face control rollers (29) are stopped in rotation.
    EP98950159A 1997-10-22 1998-10-20 Roll bending machine for forming a ring-shaped part Expired - Lifetime EP1024914B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FR9713224 1997-10-22
    FR9713224A FR2769859B1 (en) 1997-10-22 1997-10-22 ROLLING MACHINE FOR ANNULAR PART TO BE FORMED
    PCT/FR1998/002241 WO1999020415A1 (en) 1997-10-22 1998-10-20 Roll bending machine for forming a ring-shaped part

    Publications (2)

    Publication Number Publication Date
    EP1024914A1 EP1024914A1 (en) 2000-08-09
    EP1024914B1 true EP1024914B1 (en) 2002-05-02

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    ID=9512507

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98950159A Expired - Lifetime EP1024914B1 (en) 1997-10-22 1998-10-20 Roll bending machine for forming a ring-shaped part

    Country Status (5)

    Country Link
    EP (1) EP1024914B1 (en)
    DE (1) DE69805200T2 (en)
    ES (1) ES2173631T3 (en)
    FR (1) FR2769859B1 (en)
    WO (1) WO1999020415A1 (en)

    Families Citing this family (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JP2001121416A (en) * 1999-10-27 2001-05-08 Minebea Co Ltd Method of finishing land of outer race of bearing, and bearing
    CN101829745B (en) * 2010-04-23 2012-01-11 武汉理工大学 Cold ring rolling forming method for double-flute section ring
    CN104416099A (en) * 2013-09-04 2015-03-18 张家港市华尔东环形锻件有限公司 Special-shaped core roller for ring rolling mill
    CN108856608B (en) * 2018-06-05 2019-09-20 北京中科三维科技有限公司 High precision numerical control closed loop rolling and forming system

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3681962A (en) * 1969-12-01 1972-08-08 Rotary Profile Anstalt Apparatus for rolling rings
    US4173134A (en) * 1978-02-24 1979-11-06 General Electric Company Apparatus and method for guiding a ring structure during the manufacture thereof
    US4869088A (en) * 1988-07-05 1989-09-26 Kazuo Kadotani Ring shaping apparatus
    DE4405373C2 (en) * 1994-02-19 1997-12-04 Bad Dueben Profilwalzmaschinen Device for the round rolling of rings

    Also Published As

    Publication number Publication date
    EP1024914A1 (en) 2000-08-09
    FR2769859A1 (en) 1999-04-23
    DE69805200D1 (en) 2002-06-06
    WO1999020415A1 (en) 1999-04-29
    FR2769859B1 (en) 2000-01-28
    DE69805200T2 (en) 2002-10-24
    ES2173631T3 (en) 2002-10-16

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