EP2049285B1 - Pivoting roller cage for a rolling tool - Google Patents

Pivoting roller cage for a rolling tool Download PDF

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Publication number
EP2049285B1
EP2049285B1 EP07803917A EP07803917A EP2049285B1 EP 2049285 B1 EP2049285 B1 EP 2049285B1 EP 07803917 A EP07803917 A EP 07803917A EP 07803917 A EP07803917 A EP 07803917A EP 2049285 B1 EP2049285 B1 EP 2049285B1
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EP
European Patent Office
Prior art keywords
roller
supports
housing
bore
bores
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Not-in-force
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EP07803917A
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German (de)
French (fr)
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EP2049285A1 (en
Inventor
Lucia Garcia Aranda
Nicolas Massue
Gilles Yvenat
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Renault SAS
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Renault SAS
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Publication of EP2049285A1 publication Critical patent/EP2049285A1/en
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Publication of EP2049285B1 publication Critical patent/EP2049285B1/en
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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
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B21H7/182—Rolling annular grooves
    • B21H7/185—Filet rolling, e.g. of crankshafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
    • B24B39/04—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working external surfaces of revolution
    • B24B39/045—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working external surfaces of revolution the working tool being composed of a plurality of working rolls or balls

Definitions

  • the present invention generally relates to roller burnishing machines, in particular those used for the work hardening of the crankshafts of internal combustion engines.
  • It relates more particularly to a rolling roller casing roller housing having at least two supports vis-à-vis adapted to maintain in position retaining means housing a roller.
  • It also relates to a roller burnishing machine comprising an action tool housing.
  • crankshaft is a mechanical part intended to be constantly in motion when the engine is running, which is why it is dimensioned so as to be robust but also the lightest and least bulky possible.
  • crankshaft is one of the parts of the most mechanically stressed engine.
  • crankshaft is subjected to torsion and bending forces as well as significant vibrations.
  • it must withstand many cycles of engine operation.
  • crankshafts are made in one piece by forging or molding then they undergo machining operations, including work hardening by roller burnishing, intended to modify the structure of the material that composes them to make them more resistant.
  • the burnishing operation consists in imposing a permanent deformation on the surface of the material to improve its resistance to fatigue.
  • crank pins and trunnions consists in reinforcing the connection grooves between the arms and the crankshaft bearing surfaces (called crank pins and trunnions).
  • Known rolling machines have two rollers spaced apart from each other, and generally also inclined relative to each other, which each roll in a groove of the crankshaft exerting on the latter a large mechanical force which leads the hardening of this area.
  • the document FR 2 864 460 presents for example one of these machines which comprises an action tool provided with a housing having an inner housing in which are fixed supports a roller cage adapted to maintain two rollers in a selected orientation and a determined spacing , while leaving them free to rotate to roll on the throats.
  • the burnishing tool then adapts to a particular geometry of crankshaft bearings.
  • the present invention provides a roller cage that allows the rollers to rotate to fit the orientation of the grooves of the crankshaft to be machined.
  • roller cage as defined in the introduction, wherein the two supports are each pierced with at least one bore of common axis, and the holding means comprise two rods engaged freely. in said bores and between which is interposed the roller so that it is adapted to pivot about an axis transverse to said common axis.
  • the roller being held by rods which are themselves free to rotate about the axis in which they extend, it can, in contact with a groove of the crankshaft, naturally s' tilt to adapt its inclination to the geometry of the groove so as to smooth it uniformly over its entire section.
  • compression springs each interposed between one end of one of the rods and the bottom of the bore accommodating said rod.
  • each rod has two ends each shaped to hold the roller.
  • the rods of each support can be returned to their housing to double their life using successively their two ends to maintain the roller.
  • each rod comprises a cylindrical body engaged in the bore of the corresponding support, and a head having a diameter greater than the diameter of said cylindrical body, said head bearing on one side against the roller .
  • said head bears on the other side against the mouth of the bore of the corresponding support.
  • the invention also relates to a rolling machine as defined in the introduction, wherein it is provided that said housing comprises such a roller cage, the supports of the roller cage have means for fixing the housing.
  • the supports of the roller cage each comprise a groove and the housing comprises complementary ribs adapted to engage in said grooves to center the supports relative to the housing.
  • a roller burnishing machine 1 which comprises an upper tool, commonly known as an action tool 100, and a lower tool, commonly called a reaction tool 10.
  • This roller milling machine 1 is adapted to work a crankshaft 50 arranged between these machines. two tools.
  • the crankshaft 50 comprises along its length a series of pairs of arms 51 extending orthogonally to its axis W. As shown in FIG. figure 2 the pairs of arms 51 make it possible to connect staves 52, 53 to one another.
  • These bearing surfaces comprise journals 53 which are cylindrical and which have an axis coincident with the axis W of the crankshaft 50 and crank pins 52 which are cylindrical and which have an axis parallel and offset with respect to the axis W of the crankshaft 50.
  • each bearing 52, 53 has a cylindrical surface around an axis parallel to the axis W of the crankshaft.
  • the lateral faces vis-à-vis the two arms 51 connected to a pin 53 or to a pin 52 are planar and extend orthogonally to the axis W of the crankshaft 50.
  • the annular areas of connection between the surfaces cylindrical bearing surfaces 52, 53 and the two flat surfaces of the side faces of the arms 51 form grooves 54 to work hard.
  • the reaction tool 10 of the rolling machine 1 which is not strictly speaking the object of the present invention, is intended to support the crankshaft 50 to be machined. It comprises conventionally a housing 11 of generally parallelepiped shape with four side walls, including two front walls of axis normal to the axis W, which border a rectangular bottom wall. It is open on the front face and its two end walls each have a deep notch 12, generally in the shape of a triangle, which accommodates the corresponding span 52 or 53 of the crankshaft 50.
  • said bearing 52 or 53 of the crankshaft 50 is more particularly maintained by two reaction wheels 13 carried by two axes 14 which are housed inside the housing 11 and which extend between its two end walls.
  • the reaction wheels 13 are pivotally mounted on the axes 14 by means of needle bearings 15.
  • the action tool 100 comprises a parallelepipedal housing 101 separated longitudinally into two parts 110, 120. These two parts 110, 120 each have a front wall 111, 121 which is disposed orthogonal to the axis W of the crankshaft 50 and which is lined with returns 112, 122 extending orthogonally to said front wall.
  • the two end walls 111, 121 are positioned facing each other so that their respective returns 112, 122 are in contact with one another and together form the edge of the housing 101 of the action tool 100 .
  • each portion 110, 120 of the housing 101 is interrupted over a central portion of its length so that the edge of the housing 101 has an opening 106 disposed above said bearing surface 52 or 53 of the crankshaft 50.
  • the returns 112, 122 of the two parts of the housing 101 are pierced with coaxial bores 117, 127 of axes orthogonal to the end walls 111, 121 and arranged regularly along the periphery of the housing 101.
  • the bores 127 of one of the 120 parts of the housing are further tapped. These different bores 117, 127 are adapted to receive assembly screws 103 of the two parts 110, 120 of the housing together.
  • the housing 101 is more particularly positioned relative to the crankshaft 50 so that its lower returns extend in length orthogonal to the axis W of the crankshaft, just above the latter.
  • the end walls 111, 121 of the two parts 110, 120 of the housing 101 each have a central opening 113, 123 circular in which is slid a same axis 180.
  • a needle sleeve 105 is interposed between the axis 180 and a roller wheel 140 , allowing the latter to rotate freely about the axis 180.
  • the roller wheel 140 has, at mid-height of its outer cylindrical face, a central rib 141 of rectangular section which extends over its entire periphery.
  • the lateral faces of this central rib 141 are connected to the outer cylindrical face of the roller wheel 140 by rounded leaves 142.
  • the action tool 100 further comprises two rollers 150 held on the housing 101 of the action tool 100 by means of two roller stands 160.
  • Each roller 150 has a shape of thin disc and is disposed below the opening 106, so as to be in contact, on one side, with one of the rounded leaves 142 of the roller wheel 140, and, on the other, one of the grooves 54 of the crankshaft 50.
  • the rollers can thus exert a significant burnishing force on the grooves 54 of the crankshaft 50 to work harden.
  • roller cages 160 of the tool 100 of the rolling machine 1 comprises two identical supports 170 fixed on the same part 110, 120 of the housing 101, on either side of the opening 106, and holding means 161 of the two rollers 150.
  • the supports 170 each have a parallelepipedal shape of rectangular section. They each extend according to the length of one of the lower returns 112, 122. One of their ends is supported on an end upright 107 projecting from the ends of the lower returns of the two parts 110, 120 of the housing 101. The other end is disposed at the opening 106 of the edge of the housing 101 and is pierced with a non-through cylindrical bore 171.
  • the bores 171 of the two supports 170 which are fixed to the same part of the housing 101, on either side of the opening 106, have a common axis V.
  • each support 170 comprises along its length a groove 172 made recessed on its upper lateral face.
  • each lower return 112, 122 comprises over its entire length a rib intended to cooperate with the grooves 172 of the supports 170 to very precisely position the latter on the housing 101.
  • the supports 170 are each further pierced by a through hole 173 accommodating a fixing screw whose head bears against the lower side face of the support and whose body is screwed into a corresponding threaded bore provided in the lower return of the one of the parts of the housing 101.
  • the supports 170 comprise notches 174 hollowed out in one of their lateral faces to allow the roller wheel 140 to pass through.
  • each roller 150 comprise two identical rods 161 each having a cylindrical body 162 which has a length less than the depth of the bores 171 of the supports 170 and which is freely engaged in one of these bores 171.
  • the rods 161 also have at one of their two ends a cylindrical head 163 of diameter greater than the diameter of the cylindrical bodies 162.
  • the end face of the head 163 of each rod 161 has a recessed shape complementary to the shape of a portion of the rollers 150.
  • Each roller 150 is interposed between the end faces of the heads 163 of the two rods which are engaged in the bores 171 of the supports 170 fixed to the same return 112, 122.
  • the length of the cylindrical bodies 162 being less than the depth of the bores 171
  • the heads 163 of the rods 161 bear, on one side, against the mouth of the bore 171 of one of the supports 170, and, the other, against the corresponding roller 150.
  • the length of the head 163 of each rod 161 is precisely adjusted so that the rods 161 properly hold the rollers 150, without exerting too much force, so as not to block their rotation about their axis of revolution.
  • each roller 150 can also pivot about the common axis V when the rods 161 pivot in their bores 171.
  • the inclination of the rollers 150 can thus change to adapt to the geometry of the grooves 54 of the crankshaft 50.
  • each rod may have a head of diameter equal to the diameter of its cylindrical body, and two identical ends having a shape complementary to the shape of a portion of the rollers.
  • a compression spring is interposed between the free end of the cylindrical body of each rod and the bottom wall of the corresponding bore.
  • the compression springs make it possible to hold the two rods of each roller cage in contact with the roller so that the latter can pivot about its axis of revolution which is arranged perpendicularly to the common axis.
  • each of the rods 161 and each of the supports 170 of the rolling machine 1 is made in one piece.

Abstract

The pivoting roller (150) cage with a rolling tool useful in a crankshaft (50) rolling machine (1), comprises two opposing supports for holding in position of retaining unit holding a roller, and compression springs interposed between an end of shafts and a bottom of the bore holding the shafts. The two supports are pierced by bores with a common axis. The retaining unit comprises two shafts, which are freely inserted into the bores and between which the roller is interposed for pivoting about an axis transverse to the common axis. Each shaft comprises two ends cooperate with the roller. The pivoting roller (150) cage with a rolling tool useful in a crankshaft (50) rolling machine (1), comprises two opposing supports for holding in position of retaining unit holding a roller, and compression springs interposed between an end of shafts and a bottom of the bore holding the shafts. The two supports are pierced by bores with a common axis. The retaining unit comprises two shafts, which are freely inserted into the bores and between which the roller is interposed for pivoting about an axis transverse to the common axis. Each shaft comprises two ends cooperate with the roller, a cylindrical body connected to the bore of the support, and a head having a diameter higher than a diameter of the cylindrical body. The head captivates the support on a side against the roller and on other side against an aperture of bore of the support. The shafts are adapted to turn around the common axis within the bores of the support. An independent claim is included for a rolling machine.

Description

DOMAINE TECHNIQUE AUQUEL SE RAPPORTE L'INVENTIONTECHNICAL FIELD TO WHICH THE INVENTION REFERS

La présente invention concerne de manière générale les machines de galetage, notamment celles utilisées pour l'écrouissage des vilebrequins de moteurs à combustion interne.The present invention generally relates to roller burnishing machines, in particular those used for the work hardening of the crankshafts of internal combustion engines.

Elle concerne plus particulièrement une cage à galet de boîtier d'outil de galetage comportant au moins deux supports en vis-à-vis adaptés à maintenir en position des moyens de maintien logeant un galet.It relates more particularly to a rolling roller casing roller housing having at least two supports vis-à-vis adapted to maintain in position retaining means housing a roller.

Elle concerne également une machine de galetage comportant un boîtier d'outil d'action.It also relates to a roller burnishing machine comprising an action tool housing.

ARRIERE-PLAN TECHNOLOGIQUEBACKGROUND

Le vilebrequin est une pièce mécanique destinée à être constamment en mouvement lorsque le moteur est en marche, c'est la raison pour laquelle il est dimensionné de manière à être robuste mais aussi le plus léger et le moins encombrant possible.The crankshaft is a mechanical part intended to be constantly in motion when the engine is running, which is why it is dimensioned so as to be robust but also the lightest and least bulky possible.

En particulier, c'est l'une des pièces du moteur la plus fortement sollicitée mécaniquement. En effet, le vilebrequin est soumis à des efforts de torsion et de flexion ainsi qu'à d'importantes vibrations. En outre, il doit résister à de très nombreux cycles de fonctionnement du moteur.In particular, it is one of the parts of the most mechanically stressed engine. Indeed, the crankshaft is subjected to torsion and bending forces as well as significant vibrations. In addition, it must withstand many cycles of engine operation.

Généralement, les vilebrequins sont réalisés d'une seule pièce par forgeage ou moulage puis ils subissent des opérations d'usinage, notamment d'écrouissage par galetage, destinés à modifier la structure du matériau qui les compose pour les rendre plus résistants.Generally, the crankshafts are made in one piece by forging or molding then they undergo machining operations, including work hardening by roller burnishing, intended to modify the structure of the material that composes them to make them more resistant.

L'opération de galetage consiste à imposer une déformation permanente à la surface du matériau pour améliorer sa tenue à la fatigue.The burnishing operation consists in imposing a permanent deformation on the surface of the material to improve its resistance to fatigue.

Plus particulièrement, elle consiste à renforcer les gorges de raccordement entre les bras et les portées du vilebrequin (appelées manetons et tourillons).More particularly, it consists in reinforcing the connection grooves between the arms and the crankshaft bearing surfaces (called crank pins and trunnions).

Les machines de galetage connues comportent deux galets écartés l'un de l'autre, et généralement aussi inclinés l'un par rapport à l'autre, qui roulent chacun dans une gorge du vilebrequin en exerçant sur cette dernière un grand effort mécanique qui conduit à l'écrouissage de cette zone.Known rolling machines have two rollers spaced apart from each other, and generally also inclined relative to each other, which each roll in a groove of the crankshaft exerting on the latter a large mechanical force which leads the hardening of this area.

Le document FR 2 864 460 présente par exemple l'une de ces machines qui comporte un outil d'action muni d'un boîtier présentant un logement intérieur dans lequel sont fixés des supports d'une cage à galets adaptée à maintenir deux galets selon une orientation choisie et un écartement déterminé, tout en les laissant libre en rotation pour rouler sur les gorges. L'outil de galetage ne s'adapte alors qu'à une géométrie particulière de portées de vilebrequins.The document FR 2 864 460 presents for example one of these machines which comprises an action tool provided with a housing having an inner housing in which are fixed supports a roller cage adapted to maintain two rollers in a selected orientation and a determined spacing , while leaving them free to rotate to roll on the throats. The burnishing tool then adapts to a particular geometry of crankshaft bearings.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

Par rapport à l'état de la technique, la présente invention propose une cage à galets qui permet aux galets de pivoter pour qu'ils s'adaptent à l'orientation des gorges du vilebrequin à usiner.Compared to the state of the art, the present invention provides a roller cage that allows the rollers to rotate to fit the orientation of the grooves of the crankshaft to be machined.

Plus particulièrement, on propose selon l'invention une cage à galet telle que définie dans l'introduction, dans laquelle les deux supports sont chacun percés d'au moins un alésage d'axe commun, et les moyens de maintien comportent deux tiges engagées librement dans lesdits alésages et entre lesquelles est interposé le galet de manière que celui-ci est adapté à pivoter autour d'un axe transversal audit axe commun.More particularly, it is proposed according to the invention a roller cage as defined in the introduction, wherein the two supports are each pierced with at least one bore of common axis, and the holding means comprise two rods engaged freely. in said bores and between which is interposed the roller so that it is adapted to pivot about an axis transverse to said common axis.

Ainsi, grâce à l'invention, le galet étant maintenu par des tiges qui sont elles-mêmes libres en rotation autour de l'axe selon lequel elles s'étendent, il peut, au contact d'une gorge du vilebrequin, naturellement s'incliner pour adapter son inclinaison à la géométrie de la gorge de manière à l'écrouir de manière homogène sur toute sa section.Thus, thanks to the invention, the roller being held by rods which are themselves free to rotate about the axis in which they extend, it can, in contact with a groove of the crankshaft, naturally s' tilt to adapt its inclination to the geometry of the groove so as to smooth it uniformly over its entire section.

Selon une première variante de l'invention, il est prévu des ressorts de compression interposés chacun entre une extrémité d'une des tiges et le fond de l'alésage accueillant ladite tige.According to a first variant of the invention, there are provided compression springs each interposed between one end of one of the rods and the bottom of the bore accommodating said rod.

Ces ressorts de compression permettent aux tiges de rester chacune au contact du galet sans pour autant le bloquer en rotation de manière que ce dernier reste en place, en particulier lorsqu'il n'est pas en appui sur une des gorges du vilebrequin.These compression springs allow the rods to remain each in contact with the roller without blocking it in rotation so that the latter remains in place, especially when it is not supported on one of the grooves of the crankshaft.

Selon une deuxième variante de l'invention, chaque tige comporte deux extrémités chacune conformées pour maintenir le galet.According to a second variant of the invention, each rod has two ends each shaped to hold the roller.

Ainsi, les tiges de chaque support peuvent être retournées dans leur logement afin de doubler leur durée de vie en utilisant successivement leurs deux extrémités pour maintenir le galet.Thus, the rods of each support can be returned to their housing to double their life using successively their two ends to maintain the roller.

Selon un autre mode de réalisation de l'invention, chaque tige comporte un corps cylindrique engagé dans l'alésage du support correspondant, et une tête présentant un diamètre supérieur au diamètre dudit corps cylindrique, ladite tête prenant appui d'un côté contre le galet.According to another embodiment of the invention, each rod comprises a cylindrical body engaged in the bore of the corresponding support, and a head having a diameter greater than the diameter of said cylindrical body, said head bearing on one side against the roller .

Avantageusement alors, ladite tête prend appui de l'autre côté contre l'embouchure de l'alésage du support correspondant.Advantageously then, said head bears on the other side against the mouth of the bore of the corresponding support.

D'autres caractéristiques avantageuses et non limitatives de la cage à galet selon l'invention sont les suivantes :

  • chaque tige comporte une extrémité qui coopère avec le galet et qui présente une forme complémentaire de la forme d'une portion du galet ;
  • les tiges sont adaptées à tourner autour de l'axe commun à l'intérieur des alésages des supports ; et
  • chacune des tiges et chacun des supports est réalisé d'une seule pièce.
Other advantageous and non-limiting characteristics of the roller cage according to the invention are the following:
  • each rod has an end which cooperates with the roller and which has a shape complementary to the shape of a portion of the roller;
  • the rods are adapted to rotate about the common axis within the bores of the supports; and
  • each of the rods and each support is made in one piece.

L'invention concerne également une machine de galetage telle que définie dans l'introduction, dans laquelle il est prévu que ledit boîtier comporte une telle cage à galet dont les supports de la cage à galet comportent des moyens de fixation au boîtier.The invention also relates to a rolling machine as defined in the introduction, wherein it is provided that said housing comprises such a roller cage, the supports of the roller cage have means for fixing the housing.

Avantageusement, les supports de la cage à galet comportent chacun une rainure et le boîtier comporte des nervures complémentaires adaptées à s'engager dans lesdites rainures pour centrer les supports par rapport au boîtier.Advantageously, the supports of the roller cage each comprise a groove and the housing comprises complementary ribs adapted to engage in said grooves to center the supports relative to the housing.

DESCRIPTION DETAILLEE D'UN EXEMPLE DE REALISATIONDETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT

La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée.The following description with reference to the accompanying drawings, given as non-limiting examples, will make it clear what the invention consists of and how it can be achieved.

Sur les dessins annexés :

  • la figure 1 est une vue schématique de face d'une machine de galetage comportant deux cages à galet selon l'invention ;
  • la figure 2 est une vue en coupe selon le plan A-A de la figure 1;
  • la figure 3 est une vue schématique de dessous des deux cages à galet de la machine de galetage de la figure 1 ; et
  • la figure 4 est une vue schématique en perspective éclatée d'une partie de la cage à galet de la figure 1.
In the accompanying drawings:
  • the figure 1 is a schematic front view of a roller milling machine comprising two roller cages according to the invention;
  • the figure 2 is a sectional view according to the plane AA of the figure 1 ;
  • the figure 3 is a diagrammatic view from below of the two roller cages of the rolling machine of the figure 1 ; and
  • the figure 4 is a schematic perspective exploded view of part of the roller cage of the figure 1 .

Par convention, on utilisera les termes « supérieur » et « inférieur » pour désigner des éléments ou des positions orientés respectivement, selon la figure 1, vers le haut et vers le bas.By convention, the terms "upper" and "lower" will be used to designate elements or positions oriented respectively, according to the figure 1 , up and down.

Sur la figure 1, on a représenté une machine de galetage 1 qui comporte un outil supérieur, communément appelé outil d'action 100, et un outil inférieur, communément appelé outil de réaction 10. Cette machine de galetage 1 est adaptée à écrouir un vilebrequin 50 disposé entre ces deux outils.On the figure 1 , a roller burnishing machine 1 is shown which comprises an upper tool, commonly known as an action tool 100, and a lower tool, commonly called a reaction tool 10. This roller milling machine 1 is adapted to work a crankshaft 50 arranged between these machines. two tools.

Le vilebrequin 50 comprend sur sa longueur une suite de paires de bras 51 s'étendant orthogonalement à son axe W. Comme le montre la figure 2, les paires de bras 51 permettent de raccorder des portées 52, 53 les unes aux autres. Ces portées comprennent des tourillons 53 qui sont cylindriques et qui ont un axe confondu avec l'axe W du vilebrequin 50 et des manetons 52 qui sont cylindriques et qui ont un axe parallèle et décalé par rapport à l'axe W du vilebrequin 50.The crankshaft 50 comprises along its length a series of pairs of arms 51 extending orthogonally to its axis W. As shown in FIG. figure 2 the pairs of arms 51 make it possible to connect staves 52, 53 to one another. These bearing surfaces comprise journals 53 which are cylindrical and which have an axis coincident with the axis W of the crankshaft 50 and crank pins 52 which are cylindrical and which have an axis parallel and offset with respect to the axis W of the crankshaft 50.

Tel que représenté sur la figure 2, chaque portée 52, 53 présente une surface cylindrique autour d'un axe parallèle à l'axe W du vilebrequin. Les faces latérales en vis-à-vis des deux bras 51 raccordés à un tourillon 53 ou à un maneton 52 sont quant à elles planes et s'étendent orthogonalement à l'axe W du vilebrequin 50. Les zones annulaires de raccordement entre les surfaces cylindriques des portées 52, 53 et les deux surfaces planes des faces latérales des bras 51 forment des gorges 54 à écrouir.As shown on the figure 2 each bearing 52, 53 has a cylindrical surface around an axis parallel to the axis W of the crankshaft. The lateral faces vis-à-vis the two arms 51 connected to a pin 53 or to a pin 52 are planar and extend orthogonally to the axis W of the crankshaft 50. The annular areas of connection between the surfaces cylindrical bearing surfaces 52, 53 and the two flat surfaces of the side faces of the arms 51 form grooves 54 to work hard.

Comme l'illustre la figure 1, l'outil de réaction 10 de la machine de galetage 1, qui ne constitue pas à proprement parler l'objet de la présente invention, est destiné à supporter le vilebrequin 50 à usiner. Il comporte de manière classique un boîtier 11 de forme globalement parallélépipédique avec quatre parois latérales, dont deux parois frontales d'axe normal à l'axe W, qui bordent une paroi de fond rectangulaire. Il est ouvert en face avant et ses deux parois frontales présentent chacune une profonde encoche 12, globalement en forme de triangle, qui accueille la portée 52 ou 53 correspondante du vilebrequin 50.As illustrated by figure 1 , the reaction tool 10 of the rolling machine 1, which is not strictly speaking the object of the present invention, is intended to support the crankshaft 50 to be machined. It comprises conventionally a housing 11 of generally parallelepiped shape with four side walls, including two front walls of axis normal to the axis W, which border a rectangular bottom wall. It is open on the front face and its two end walls each have a deep notch 12, generally in the shape of a triangle, which accommodates the corresponding span 52 or 53 of the crankshaft 50.

Comme le montrent les figures 1 et 2, ladite portée 52 ou 53 du vilebrequin 50 est plus particulièrement maintenue par deux roues de réaction 13 portées par deux axes 14 qui sont logés à l'intérieur du boîtier 11 et qui s'étendent entre ses deux parois frontales. Afin de permettre la rotation du vilebrequin 50 autour de son axe W, les roues de réaction 13 sont montées à pivotement sur les axes 14 au moyen de roulements à aiguilles 15.As shown by figures 1 and 2 , said bearing 52 or 53 of the crankshaft 50 is more particularly maintained by two reaction wheels 13 carried by two axes 14 which are housed inside the housing 11 and which extend between its two end walls. To allow rotation of the crankshaft 50 around its axis W, the reaction wheels 13 are pivotally mounted on the axes 14 by means of needle bearings 15.

Comme le montrent les figures 1 et 2, l'outil d'action 100 comporte un boîtier 101 parallélépipédique séparé longitudinalement en deux parties 110, 120. Ces deux parties 110, 120 présentent chacune une paroi frontale 111, 121 qui est disposée orthogonalement à l'axe W du vilebrequin 50 et qui est bordée de retours 112, 122 s'étendant orthogonalement à ladite paroi frontale. Les deux parois frontales 111, 121 sont positionnées en regard l'une de l'autre de manière que leurs retours 112, 122 respectifs sont en contact les uns des autres et forment ensemble la tranche du boîtier 101 de l'outil d'action 100.As shown by figures 1 and 2 , the action tool 100 comprises a parallelepipedal housing 101 separated longitudinally into two parts 110, 120. These two parts 110, 120 each have a front wall 111, 121 which is disposed orthogonal to the axis W of the crankshaft 50 and which is lined with returns 112, 122 extending orthogonally to said front wall. The two end walls 111, 121 are positioned facing each other so that their respective returns 112, 122 are in contact with one another and together form the edge of the housing 101 of the action tool 100 .

Le retour inférieur de chaque partie 110, 120 du boîtier 101 est interrompu sur une partie centrale de sa longueur de manière que la tranche du boîtier 101 présente une ouverture 106 disposée au-dessus de ladite portée 52 ou 53 du vilebrequin 50.The lower return of each portion 110, 120 of the housing 101 is interrupted over a central portion of its length so that the edge of the housing 101 has an opening 106 disposed above said bearing surface 52 or 53 of the crankshaft 50.

Les retours 112, 122 des deux parties du boîtier 101 sont percés d'alésages coaxiaux 117, 127 d'axes orthogonaux aux parois frontales 111, 121 et disposés régulièrement le long de la périphérie du boîtier 101. Les alésages 127 de l'une des parties 120 du boîtier sont en outre taraudés. Ces différents alésages 117, 127 sont adaptés à accueillir des vis d'assemblage 103 des deux parties 110, 120 du boîtier ensemble.The returns 112, 122 of the two parts of the housing 101 are pierced with coaxial bores 117, 127 of axes orthogonal to the end walls 111, 121 and arranged regularly along the periphery of the housing 101. The bores 127 of one of the 120 parts of the housing are further tapped. These different bores 117, 127 are adapted to receive assembly screws 103 of the two parts 110, 120 of the housing together.

Le boîtier 101 est plus particulièrement positionné par rapport au vilebrequin 50 de manière que ses retours inférieurs s'étendent en longueur orthogonalement à l'axe W du vilebrequin, juste au-dessus de ce dernier.The housing 101 is more particularly positioned relative to the crankshaft 50 so that its lower returns extend in length orthogonal to the axis W of the crankshaft, just above the latter.

Les parois frontales 111, 121 des deux parties 110, 120 du boîtier 101 présentent chacune une ouverture centrale 113, 123 circulaire dans laquelle est glissé un même axe 180. Une douille à aiguilles 105 est interposée entre cet axe 180 et une roue de galetage 140, permettant à cette dernière de pivoter librement autour de l'axe 180.The end walls 111, 121 of the two parts 110, 120 of the housing 101 each have a central opening 113, 123 circular in which is slid a same axis 180. A needle sleeve 105 is interposed between the axis 180 and a roller wheel 140 , allowing the latter to rotate freely about the axis 180.

La roue de galetage 140 présente, à mi-hauteur de sa face cylindrique externe, une nervure centrale 141 de section rectangulaire qui s'étend sur l'ensemble de sa périphérie. Les faces latérales de cette nervure centrale 141 sont raccordées à la face cylindrique externe de la roue de galetage 140 par des congés arrondis 142.The roller wheel 140 has, at mid-height of its outer cylindrical face, a central rib 141 of rectangular section which extends over its entire periphery. The lateral faces of this central rib 141 are connected to the outer cylindrical face of the roller wheel 140 by rounded leaves 142.

L'outil d'action 100 comporte en outre deux galets 150 maintenus sur le boîtier 101 de l'outil d'action 100 au moyen de deux cages à galet 160.The action tool 100 further comprises two rollers 150 held on the housing 101 of the action tool 100 by means of two roller stands 160.

Chaque galet 150 présente une forme de disque de faible épaisseur et est disposé en dessous de l'ouverture 106, de manière à être au contact, d'un côté, d'un des congés arrondi 142 de la roue de galetage 140, et, de l'autre, d'une des gorges 54 du vilebrequin 50. Les galets peuvent ainsi exercer un effort de galetage important sur les gorges 54 du vilebrequin 50 pour les écrouir.Each roller 150 has a shape of thin disc and is disposed below the opening 106, so as to be in contact, on one side, with one of the rounded leaves 142 of the roller wheel 140, and, on the other, one of the grooves 54 of the crankshaft 50. The rollers can thus exert a significant burnishing force on the grooves 54 of the crankshaft 50 to work harden.

Comme le montrent plus particulièrement les figures 1 et 3, les cages à galet 160 de l'outil d'action 100 de la machine de galetage 1 comporte deux supports 170 identiques fixés sur une même partie 110, 120 du boîtier 101, de part et d'autre de l'ouverture 106, et des moyens de maintien 161 des deux galets 150.As shown more particularly by figures 1 and 3 the roller cages 160 of the tool 100 of the rolling machine 1 comprises two identical supports 170 fixed on the same part 110, 120 of the housing 101, on either side of the opening 106, and holding means 161 of the two rollers 150.

Comme le montre plus particulièrement la figure 4, les supports 170 présentent chacun une forme parallélépipédique de section rectangulaire. Ils s'étendent chacun selon la longueur d'un des retours 112, 122 inférieurs. Une de leurs extrémités prend appui sur un montant d'extrémité 107 faisant saillie des extrémités des retours inférieurs des deux parties 110, 120 du boîtier 101. L'autre extrémité est disposée au niveau de l'ouverture 106 de la tranche du boîtier 101 et est percée d'un alésage 171 cylindrique non traversant. Les alésages 171 des deux supports 170 qui sont fixés à une même partie du boîtier 101, de part et d'autre de l'ouverture 106, présentent un axe commun V.As shown more particularly in figure 4 the supports 170 each have a parallelepipedal shape of rectangular section. They each extend according to the length of one of the lower returns 112, 122. One of their ends is supported on an end upright 107 projecting from the ends of the lower returns of the two parts 110, 120 of the housing 101. The other end is disposed at the opening 106 of the edge of the housing 101 and is pierced with a non-through cylindrical bore 171. The bores 171 of the two supports 170 which are fixed to the same part of the housing 101, on either side of the opening 106, have a common axis V.

Comme le montre la figure 4, chaque support 170 comporte sur sa longueur une rainure 172 réalisée en creux sur sa face latérale supérieure. En correspondance, chaque retour 112, 122 inférieur comporte sur toute sa longueur une nervure destinée à coopérer avec les rainures 172 des supports 170 pour positionner très précisément ces derniers sur le boîtier 101.As shown in figure 4 each support 170 comprises along its length a groove 172 made recessed on its upper lateral face. Correspondingly, each lower return 112, 122 comprises over its entire length a rib intended to cooperate with the grooves 172 of the supports 170 to very precisely position the latter on the housing 101.

Les supports 170 sont en outre chacun percés d'un trou traversant 173 accueillant une vis de fixation dont la tête prend appui contre la face latérale inférieure du support et dont le corps est vissé dans un alésage taraudé correspondant prévu dans le retour inférieur de l'une des parties du boîtier 101.The supports 170 are each further pierced by a through hole 173 accommodating a fixing screw whose head bears against the lower side face of the support and whose body is screwed into a corresponding threaded bore provided in the lower return of the one of the parts of the housing 101.

Les supports 170 comportent enfin des encoches 174 réalisées en creux dans l'une de leurs faces latérales pour permettre le passage de la roue de galetage 140.Finally, the supports 170 comprise notches 174 hollowed out in one of their lateral faces to allow the roller wheel 140 to pass through.

Les moyens de maintien de chaque galet 150 comprennent deux tiges 161 identiques présentant chacun un corps cylindrique 162 qui présente une longueur inférieure à la profondeur des alésages 171 des supports 170 et qui est engagé librement dans l'un de ces alésages 171. Les tiges 161 présentent en outre à l'une de leurs deux extrémités une tête 163 cylindrique de diamètre supérieur au diamètre des corps cylindriques 162.The holding means of each roller 150 comprise two identical rods 161 each having a cylindrical body 162 which has a length less than the depth of the bores 171 of the supports 170 and which is freely engaged in one of these bores 171. The rods 161 also have at one of their two ends a cylindrical head 163 of diameter greater than the diameter of the cylindrical bodies 162.

La face d'extrémité de la tête 163 de chaque tige 161 présente une forme en creux complémentaire de la forme d'une portion des galets 150.The end face of the head 163 of each rod 161 has a recessed shape complementary to the shape of a portion of the rollers 150.

Chaque galet 150 est interposé entre les faces d'extrémités des têtes 163 des deux tiges qui sont engagées dans les alésages 171 des supports 170 fixés à un même retour 112, 122.Each roller 150 is interposed between the end faces of the heads 163 of the two rods which are engaged in the bores 171 of the supports 170 fixed to the same return 112, 122.

Comme le montrent les figures 1 et 3, la longueur des corps cylindriques 162 étant inférieure à la profondeur des alésages 171, les têtes 163 des tiges 161 prennent appui, d'un côté, contre l'embouchure de l'alésage 171 de l'un des supports 170, et, de l'autre, contre le galet 150 correspondant. La longueur de la tête 163 de chaque tige 161 est précisément ajustée pour que les tiges 161 maintiennent correctement les galets 150, sans pour autant exercer dessus un effort trop important, de manière à ne pas bloquer leur rotation autour de leur axe de révolution.As shown by figures 1 and 3 the length of the cylindrical bodies 162 being less than the depth of the bores 171, the heads 163 of the rods 161 bear, on one side, against the mouth of the bore 171 of one of the supports 170, and, the other, against the corresponding roller 150. The length of the head 163 of each rod 161 is precisely adjusted so that the rods 161 properly hold the rollers 150, without exerting too much force, so as not to block their rotation about their axis of revolution.

Les corps cylindriques 162 des tiges 161 sont engagés librement dans les alésages 171 des supports 170, si bien que chaque galet 150 peut également pivoter autour de l'axe commun V lorsque les tiges 161 pivotent dans leurs alésages 171. L'inclinaison des galets 150 peut ainsi changer pour s'adapter à la géométrie des gorges 54 du vilebrequin 50.The cylindrical bodies 162 of the rods 161 are freely engaged in the bores 171 of the supports 170, so that each roller 150 can also pivot about the common axis V when the rods 161 pivot in their bores 171. The inclination of the rollers 150 can thus change to adapt to the geometry of the grooves 54 of the crankshaft 50.

En variante, chaque tige peut présenter une tête de diamètre égal au diamètre de son corps cylindrique, et deux extrémités identiques présentant une forme complémentaire de la forme d'une portion des galets. Ainsi, une fois l'une des extrémités de la tige abîmée, la tige peut être retournée dans son alésage pour remplir à nouveau la fonction pour laquelle elle a été conçue.As a variant, each rod may have a head of diameter equal to the diameter of its cylindrical body, and two identical ends having a shape complementary to the shape of a portion of the rollers. Thus, once one of the ends of the damaged rod, the rod can be returned to its bore to refill the function for which it was designed.

Selon cette variante non représentée de la machine de galetage, un ressort de compression est interposé entre l'extrémité libre du corps cylindrique de chaque tige et la paroi de fond de l'alésage correspondant.According to this variant not shown of the rolling machine, a compression spring is interposed between the free end of the cylindrical body of each rod and the bottom wall of the corresponding bore.

Les ressorts de compression permettent de maintenir les deux tiges de chaque cage à galet au contact du galet de sorte que ce dernier puisse pivoter autour de son axe de révolution qui est disposé perpendiculairement à l'axe commun.The compression springs make it possible to hold the two rods of each roller cage in contact with the roller so that the latter can pivot about its axis of revolution which is arranged perpendicularly to the common axis.

Quoi qu'il en soit, chacun des tiges 161 et chacun des supports 170 de la machine de galetage 1 est réalisé d'une seule pièce.In any case, each of the rods 161 and each of the supports 170 of the rolling machine 1 is made in one piece.

Claims (10)

  1. Roller cage (160) for the housing (101) of a roller-burnishing tool (1) comprising at least two opposing supports (170) designed to hold in position retaining means (161) housing a roller (150), characterized in that the two supports (170) are each pierced with at least one bore (171) of common axis (V) and the retaining means comprise two rods (161) engaged freely in said bores (171) and between which the roller (150) is interposed in such a way that this roller is able to pivot about an axis transverse to said common axis (V).
  2. Roller cage (160) according to the preceding claim, characterized in that it comprises compression springs each interposed between one end of one of the rods (161) and the closed end of the bore (171) accommodating said rod (161).
  3. Roller cage (160) according to one of the preceding claims, characterized in that each rod (161) has two ends each shaped to retain the roller (150).
  4. Roller cage (160) according to Claim 1, characterized in that each rod (161) comprises a cylindrical body (162) engaged in the bore (171) of the corresponding support (170), and a head (163) of a diameter greater than the diameter of said cylindrical body (162), said head (163) resting on one side against the roller (150).
  5. Roller cage (160) according to the preceding claim, characterized in that said head (163) rests on the other side against the mouth of the bore (171) of the corresponding support (170).
  6. Roller cage (160) according to one of the preceding claims, characterized in that each rod (161) has an end which collaborates with the roller (150) and which has a shape that complements the shape of a portion of the roller (150).
  7. Roller cage (160) according to one of the preceding claims, characterized in that the rods (161) are designed to rotate about the common axis (V) inside the bores (171) of the supports (170).
  8. Roller cage (160) according to one of the preceding claims, characterized in that each of the rods (161) and each of the supports (170) is made of a single piece.
  9. Roller-burnishing machine (1) comprising a housing (101) for an operating tool (100), characterized in that said housing (101) comprises a roller cage (160) according to one of the preceding claims, in which the supports (170) comprise means of attachment to the housing (101).
  10. Roller-burnishing machine (1) according to the preceding claim, characterized in that the supports (170) of the roller cage (160) each have a groove (172) and the housing (101) has complementary ribs designed to engage in said grooves (172) in order to centre the supports (170) with respect to the housing (101).
EP07803917A 2006-07-31 2007-06-21 Pivoting roller cage for a rolling tool Not-in-force EP2049285B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0606987A FR2904249B1 (en) 2006-07-31 2006-07-31 SWIVEL ROLL CAGE FOR ROLLING TOOL
PCT/FR2007/051492 WO2008015348A1 (en) 2006-07-31 2007-06-21 Pivoting roller cage for a rolling tool

Publications (2)

Publication Number Publication Date
EP2049285A1 EP2049285A1 (en) 2009-04-22
EP2049285B1 true EP2049285B1 (en) 2009-12-16

Family

ID=37758881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07803917A Not-in-force EP2049285B1 (en) 2006-07-31 2007-06-21 Pivoting roller cage for a rolling tool

Country Status (5)

Country Link
EP (1) EP2049285B1 (en)
AT (1) ATE451983T1 (en)
DE (1) DE602007003850D1 (en)
FR (1) FR2904249B1 (en)
WO (1) WO2008015348A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013006779U1 (en) * 2013-07-27 2014-10-29 Hegenscheidt-Mfd Gmbh & Co. Kg rolling tool

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2609787C3 (en) * 1976-03-10 1978-09-07 Wilhelm Hegenscheidt, Gmbh, 5140 Erkelenz Device for rolling fillets
DE10040146A1 (en) * 2000-08-17 2002-03-07 Hegenscheidt Mfd Gmbh & Co Kg Tool for deep rolling the punctures on crankshaft bearings or crank pins
FR2864460B1 (en) * 2003-12-31 2006-04-07 Renault Sas ROLLING MACHINE, IN PARTICULAR FOR THE NUTTING OF A CRANKSHAFT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013006779U1 (en) * 2013-07-27 2014-10-29 Hegenscheidt-Mfd Gmbh & Co. Kg rolling tool

Also Published As

Publication number Publication date
EP2049285A1 (en) 2009-04-22
DE602007003850D1 (en) 2010-01-28
WO2008015348A1 (en) 2008-02-07
ATE451983T1 (en) 2010-01-15
FR2904249B1 (en) 2008-09-12
FR2904249A1 (en) 2008-02-01

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