EP0060197A1 - Honing tool with variable granulometry - Google Patents

Honing tool with variable granulometry Download PDF

Info

Publication number
EP0060197A1
EP0060197A1 EP82400395A EP82400395A EP0060197A1 EP 0060197 A1 EP0060197 A1 EP 0060197A1 EP 82400395 A EP82400395 A EP 82400395A EP 82400395 A EP82400395 A EP 82400395A EP 0060197 A1 EP0060197 A1 EP 0060197A1
Authority
EP
European Patent Office
Prior art keywords
ring
grooves
lapping
male
female
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82400395A
Other languages
German (de)
French (fr)
Other versions
EP0060197B1 (en
Inventor
Pierre André Largeteau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0060197A1 publication Critical patent/EP0060197A1/en
Application granted granted Critical
Publication of EP0060197B1 publication Critical patent/EP0060197B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/08—Honing tools
    • B24B33/085—Honing tools in which the honing element consists of a deformable body

Definitions

  • a ring 19 is fitted onto a tie rod 20 fixed to the end of the expansion cone 3 and held in place by a nut 21.
  • Finished diamond rings 10a are mounted on the body 1, in line with the ring 19, being separated from the rings 10 by a ring 22; the set of diamond rings 10 and 10a is held on the body by a nut 23.
  • the ring 19 has non-opening longitudinal slots 24 and external grooves 25 with a sloping bottom, in which pushers 18a are engaged, the face lower of these pushers having the same slope as the bottom of the grooves 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

1. Expanding grinder for grinding machine comprising at least one abrasive ring 10 which is elastic and deformable, for example diamond-charged, internally fluted, and which is mounted on a body or mandrel 1, the latter comprising a central bore 2 in which an expansion cone 3 is mounted to move axially, said cone being adapted to deform the ring via pusher element 18 movable radially in the body 1, characterized in that the pusher elements 18 are in abutment against inner male flutes 11b of the ring 10, in that the expansion cone 3 is maintained at intervals in the axis of the body 1 by centering means 4 disposed in mortises 5 made on the periphery of the cone, and in that the ring 10 comprises outer flutes 13-14 distributed uniformly on its periphery, the outer female flutes 13 being disposed opposite the inner males flutes 11a and being sufficiently deep for the wall existing between an outer female flute 13 and an inner male flute 11a to be sufficiently thin to give the ring the suppleness necessary for its expansion.

Description

La présente invention concerne des rodoirs expansibles pour machines à roder comprenant au moins une bague abrasive élastique et déformable, par exemple diamantée, cannelée intérieurement, et qui est montée sur un corps ou mandrin, ce dernier comportant un alésage central dans lequel est monté mobile axialement un cône d'expansion propre à déformer la bague par l'intermédiaire de poussoirs mobiles radialement dans le corps.The present invention relates to expandable lappers for lapping machines comprising at least one elastic and deformable abrasive ring, for example diamond-coated, internally fluted, and which is mounted on a body or mandrel, the latter comprising a central bore in which is mounted axially movable an expansion cone capable of deforming the ring by means of pushers which can move radially in the body.

Dans les rodoirs de ce genre actuellement réalisés, les bagues abrasives sont fendues. Or l'expérience montre que ces bagues abrasives se déforment en tonneaux.In the grinders of this kind currently produced, the abrasive rings are split. However, experience shows that these abrasive rings deform in barrels.

La présente invention a pour objet un rodoir du type ci-dessus dans lequel la bague abrasive se déforme en restant parfaitement cylindrique, ce qui entraîne une meilleure précision du rodage.The present invention relates to a lapping machine of the above type in which the abrasive ring deforms while remaining perfectly cylindrical, which results in better lapping precision.

Le rodoir selon l'invention est caractérisé en ce que les poussoirs sont en appui contre des cannelures intérieures mâles de la bague et en ce que cette bague comporte, en outre, des cannelures extérieures.The lapping according to the invention is characterized in that the pushers are in abutment against male internal splines of the ring and in that this ring also comprises external splines.

La bague abrasive peut comporter deux fois plus de cannelures mâles et femelles intérieures que de cannelures mâles et femelles extérieures, les cannelures femelles extérieures étant disposées en regard des cannelures mâles intérieures. Ces cannelures femelles extérieures sont, de préférence, suffisamment profondes pour que les cannelures mâles intérieures disposées en regard soient suffisamment minces pour donner à la bague la souplesse nécessaire à son expansion. Le rodoir peut comporter au droit de chaque bague, autant de poussoirs qu'il existe de cannelures mâles ou de cannelures femelles extérieures, chacun d'eux se trouvant au contact d'une cannelure mâle intérieure située en regard d'une cannelure mâle extérieure.The abrasive ring can have twice as many internal male and female grooves as external male and female grooves, the external female grooves being arranged opposite the internal male grooves. These external female grooves are preferably deep enough for the internal male grooves arranged opposite to be thin enough to give the ring the flexibility it needs to expand. The lapping may comprise at the right of each ring, as many pushers as there are male grooves or external female grooves, each of them being in contact with an internal male groove situated opposite an external male groove.

La bague abrasive peut également comporter un nombre égal de cannelures intérieures et de cannelures extérieures, chaque cannelure mâle intérieure étant disposée en regard d'une cannelure femelle extérieure. Dans ce cas, le rodoir peut comporter, au droit de la bague, des poussoirs en nombre égal à la moitié du nombre des cannelures mâles ou des cannelures femelles, chacun d'eux se trouvant au contact d'une cannelure mâle intérieure.The abrasive ring can also include an equal number of internal grooves and external grooves, each internal male groove being arranged opposite an external female groove. In this case, the lapping may comprise, in line with the ring, pushers in a number equal to half the number of male grooves or female grooves, each of them being in contact with an internal male groove.

Dans un mode de réalisation avantageux de l'invention, le rodoir comporte du côté de son extrémité libre au moins une bague de fixation coaxiale à une bague à rampes qui est solidaire du cône d'expansion, présente une surface extérieure cylindrique au contact de la paroi de l'alésage central du corps du rodoir, et est munie de rainures en pente dans lesquelles sont engagées des poussoirs d'expansion.In an advantageous embodiment of the invention, the lapping comprises on the side of its free end at least one fixing ring coaxial with a ring with ramps which is integral with the expansion cone, has a cylindrical outer surface in contact with the wall of the central bore of the lapping body, and is provided with sloping grooves in which are engaged expansion pushers.

On a décrit ci-après, à titre d'exemples non limitatifs, divers modes de réalisation du rodoir selon l'invention, avec référence aux dessins annexés dans lesquels :

  • La Figure 1 est une vue en coupe axiale d'un premier mode de réalisation du rodoir,
  • La Figure 2 en est une coupe transversale suivant II-II de la Figure 1,
  • La Figure 3 en est une coupe transversale suivant III-III de la Figure 1,
  • La Figure 4 en est une coupe transversale suivant IV-IV de la Figure 1,
  • La Figure 5 est une coupe transversale montrant un autre type de bague expansible.
Various embodiments of the lapping according to the invention have been described below, by way of non-limiting examples, with reference to the appended drawings in which:
  • FIG. 1 is a view in axial section of a first embodiment of the lapping machine,
  • Figure 2 is a cross section along II-II of Figure 1,
  • Figure 3 is a cross section along III-III of Figure 1,
  • Figure 4 is a cross section along IV-IV of Figure 1,
  • Figure 5 is a cross section showing another type of expandable ring.

Tel qu'il est représenté aux Figures 1 à 4, le rodoir selon l'invention comprend un corps ou mandrin 1 comportant un alésage cylindrique 2 à l'intérieur duquel peut coulisser un cône d'expansion 3. Ce cône est maintenu de place en place dans l'axe du corps 1 par des centreurs 4 qui sont collés dans des mortaises 5 ménagées à la périphérie du cône. Dans l'exemple représenté, il est prévu trois séries de mortaises séparées axialement les unes des autres chaque série comportant quatre mortaises réparties circon- férentiellement autour du cône. Un pion 6 traverse un trou prévu axialement à l'une des extrémités du corps 1 et est engagé dans une rainure 7 du cône 3, ce qui solidarise en rotation le cône et le corps tout en permettant au cône de se déplacer axialement àans le corps. La référence 8 désigne un embout vissé dans l'extrémité de grande section du cône et qui est destiné : être relié à la tige d'expansion, non représentée, d'une machine à roder.As shown in Figures 1 to 4, the lapping according to the invention comprises a body or mandrel 1 having a cylindrical bore 2 inside which can slide an expansion cone 3. This cone is held in place in place in the axis of the body 1 by centralizers 4 which are glued in mortises 5 formed at the periphery of the cone. In the example shown, it is provided three series of mortises axially separated from each other each series comprising four mortises distributed circumferentially around the cone. A pin 6 crosses a hole provided axially at one end of the body 1 and is engaged in a groove 7 of the cone 3, which secures in rotation the cone and the body while allowing the cone to move axially with the body . The reference 8 designates a nozzle screwed into the end of the large section of the cone and which is intended: to be connected to the expansion rod, not shown, of a lapping machine.

Sur le corps 1 sont montées une entretoise 9 et une série de bagues diamantées 10.On the body 1 are mounted a spacer 9 and a series of diamond rings 10.

Chacune des bagues 10 est cannelée intérieurement et extérieurement. De manière plus précise, elle comporte intérieurement 2n cannelures mâles alternativement lla et llb équidistantes et séparées les unes des autres par des cannelures femelles 12, légèrement plus étroites que les cannelures mâles. Extérieurement, elle comporte n cannelures femelles 13 disposées en regard des cannelures mâles intérieures lla et séparées les unes des autres par des cannelures mâles 14. Ces cannelures femelles 13 ont une largeur inférieure à celle des cannelures lla et sont relativement profondes de sorte que la bague présente une épaisseur réduite au droit de ces cannelures lla,ce qui lui donne une certaine souplesse et permet son extension.Each of the rings 10 is fluted internally and externally. More specifically, it has internally 2n male splines alternately 11a and 11b equidistant and separated from each other by female splines 12, slightly narrower than the male splines. Externally, it comprises n female splines 13 arranged opposite the internal male splines lla and separated from each other by male splines 14. These female splines 13 have a width less than that of the splines lla and are relatively deep so that the ring has a reduced thickness at the right of these grooves lla, which gives it a certain flexibility and allows its extension.

Le corps 1 du rodoir comporte sur sa périphérie 2n cannelures 16 qui s'étendent sur pratiquement toute sa longueur. Dans ces cannelures débouchent des ouvertures 17 dont la longueur est sensiblement égale à celle des bagues 10 et qui sont écartées les unes des autres d'une distance égale à cette même longueur; ces ouvertures 17 sont disposées en quinconce.The body 1 of the lapping has on its periphery 2n grooves 16 which extend over practically its entire length. In these grooves open openings 17 whose length is substantially equal to that of the rings 10 and which are spaced from each other by a distance equal to this same length; these openings 17 are staggered.

Les bagues 10 sont montées sur le corps 1 en ayant leurs cannelures mâles intérieures lla et llb engagées dans les cannelures du corps 1, de façon que les cannelures llb se trouvent en regard des ouvertures 17 de ces cannelures 16. Des poussoirs 18 engagés dans ces ouvertures sont disposés entre les cannelures mâles llb et le cône d'expansion 3; la face intérieure de ces poussoirs a même pente que le cône; du fait de la disposition en quinconce des ouvertures 17, les positions angulaires des bagues lO diffèrent d'une bague à l'autre de 360°/2n.The rings 10 are mounted on the body 1 having their internal male splines 11a and 11b engaged in the splines of the body 1, so that the splines 11b are located opposite the openings 17 of these splines 16. Pushers 18 engaged in these openings are arranged between the male splines 11b and the expansion cone 3; the inner face of these pushers has the same slope as the cone; due to the staggered arrangement of the openings 17, the angular positions of the rings 10 differ from one ring to the other by 360 ° / 2n.

Une bague 19 est emmanchée sur un tirant 20 fixé à l'extrémité du cône d'expansion 3 et maintenue en place par un écrou 21. Des bagues diamantées de finition 10a, de même constitution que les bagues de travail 10, mais d'un diamètre et d'une finesse plus grands, sont montées sur le corps 1, au droit de la bague 19, en étant séparées des bagues 10 par une bague 22; l'ensemble des bagues diamantées 10 et lOa est maintenu sur le corps par un écrou 23. La bague 19 comporte des fentes longitudinales non débouchan- tes 24 et des rainures extérieures 25 à fond penté, dans lesquelles sont engagées des poussoirs 18a, la face inférieure de ces poussoirs présentant la même pente que le fond des rainures 25.A ring 19 is fitted onto a tie rod 20 fixed to the end of the expansion cone 3 and held in place by a nut 21. Finished diamond rings 10a, of the same constitution as the working rings 10, but of a larger diameter and finer, are mounted on the body 1, in line with the ring 19, being separated from the rings 10 by a ring 22; the set of diamond rings 10 and 10a is held on the body by a nut 23. The ring 19 has non-opening longitudinal slots 24 and external grooves 25 with a sloping bottom, in which pushers 18a are engaged, the face lower of these pushers having the same slope as the bottom of the grooves 25.

Pour utiliser ce rodoir, on l' engage dégonflé dans l'alésage à usiner. Lors du battement de la broche, seules les bagues 10 sont en contact de la paroi de l'alésage. Lorsque le vérin d'expansion commandant la tige d'expansion de la machine à roder est en butée, on arrête le mouvement de la broche alors que celle-ci est en position haute et on extrait le rodoir de l'alésage; les bagues 10a finissent l'alésage.To use this lapper, it is engaged deflated in the bore to be machined. During the beating of the spindle, only the rings 10 are in contact with the wall of the bore. When the expansion cylinder controlling the expansion rod of the lapping machine is in abutment, the movement of the spindle is stopped while the latter is in the high position and the lapping rod is extracted from the bore; the rings 10a finish the bore.

Au lieu d'utiliser des bagues diamantées cannelées 10 comportant deux fois plus de cannelures extérieures que de cannelures intérieures, on peut employer des bagues diamantées cannelées 26 comportant autant de cannelures intérieures que de cannelures extérieures (Figure 5). Dans ce cas, les poussoirs se trouvent au contact de parties d'épaisseur réduite de la bague.Instead of using fluted diamond rings 10 having twice as many external flutes as internal flutes, it is possible to use fluted diamond rings 26 comprising as many internal flutes as external flutes (FIG. 5). In this case, the pushers are in contact with parts of reduced thickness of the ring.

Il va de soi que la présente invention ne doit pas être considérée comme limitée aux modes de réalisation décrits et représentés, mais en couvre, au contraire, toutes les variantes.It goes without saying that the present invention should not be considered as limited to the embodiments described and shown, but on the contrary covers all variants.

Claims (8)

1. Rodoir expansible pour machine à roder comprenant au moins une bague abrasive élastique et déformable, par exemple diamantée, cannelée intérieurement, et qui est montée sur un corps ou mandrin (u, ce dernier comportant un alésage central (2) dans lequel est monté mobile axialement un cône d'expansion (3) propre à déformer la bague par l'intermédiaire de poussoirs(18) mobiles radialement dans le corps (1), caractérisé en ce que les poussoirs (18) sont en appui contre des cannelures intérieures mâles (llb) de la bague (LO) et en ce que cette bague comporte, en outre, des cannelures extérieures.1. Expandable lapping machine for lapping machine comprising at least one elastic and deformable abrasive ring, for example diamond-coated, internally grooved, and which is mounted on a body or mandrel (u, the latter comprising a central bore (2) in which is mounted axially movable an expansion cone (3) capable of deforming the ring by means of pushers (18) radially movable in the body (1), characterized in that the pushers (18) bear against male internal splines (llb) of the ring (LO) and in that this ring also has external grooves. 2. Rodoir selon la revendication 1, caractérisé en ce que la bague (10) comporte deux fois plus de cannelures mâles et femelles intérieures que de cannelures mâles et femelles extérieures, les cannelures femelles extérieures étant disposées en regard des cannelures mâles intérieures.2. Rod according to claim 1, characterized in that the ring (10) has twice as many internal male and female grooves as external male and female grooves, the external female grooves being arranged opposite the internal male grooves. 3. Rodoir selon la revendication 2, caractérisé en ce que les cannelures femelles extérieures (13) sont suffisamment profondes pour que la cannelure mâle intérieure (lla) disposée en regard soit suffisamment mince pour donner à la bague la souplesse nécessaire à son expansion.3. Lapping according to claim 2, characterized in that the outer female grooves (13) are deep enough so that the inner male groove (lla) disposed opposite is thin enough to give the ring the flexibility necessary for its expansion. 4. Rodoir selon les revendications 1 ou 2, caractérisé en ce que le rodoir comporte, au droit de chaque bague (10), autant de poussoirs (18) qu'il existe de cannelures mâles ou de cannelures femelles extérieures, chacun d'eux se trouvant au contact d'une cannelure mâle intérieure (llb) située en regard d'une cannelure mâle extérieure (14) .4. Lapping according to claims 1 or 2, characterized in that the lapping comprises, in line with each ring (10), as many pushers (18) as there are male grooves or external female grooves, each of them being in contact with an inner male groove (llb) situated opposite an outer male groove (14). 5. Rodoir selon la revendication 1, caractérisé en ce que la bague (26) comporte un nombre égal de cannelures intérieures et de cannelures extérieures, chaque cannelure mâle intérieure étant disposée en regard d'une cannelure femelle extérieure.5. Lapping according to claim 1, characterized in that the ring (26) has an equal number of internal grooves and external grooves, each inner male groove being arranged opposite an outer female groove. 6. Rodoir selon la revendication 5, caractérisé en ce que le rodoir comporte au droit de la bague (26) des poussoirs (18) en nombre égal à la moitié du nombre des cannelures mâles ou des cannelures femelles, chacun d'eux se trouvant au contact d'une cannelure mâle intérieure.6. Lapping according to claim 5, characterized in that the lapping comprises at the level of the ring (26) pushers (18) in number equal to half the number of male grooves or female grooves, each of them being in contact with an internal male groove. 7. Rodoir selon l'une des revendications précédentes, caractérisé en ce qu'il comporte du côté de son extrémité libre au moins une bague de finition (lOa ou 27a) coaxiale à une bague à rampes qui est solidaire du cône d'expansion, présente une surface extérieure cylindrique au contact de la paroi de l'alésage central du corps (1) du rodoir, et est munie de rainures en pente dans lesquelles sont engagées des poussoirs d'expansion.7. Lap according to one of the preceding claims, characterized in that it comprises on the side of its free end at least one finishing ring (10a or 27a) coaxial with a ramp ring which is integral with the expansion cone, has a cylindrical outer surface in contact with the wall of the 'central bore of the body (1) of the lapping, and is provided with sloping grooves in which are engaged expansion pushers. 8. Rodoir selon la revendication 7, caractérisé en ce que la bague à rampes (19) est solidaire axialement d'un tirant (20) vissé dans l'extrémité du cône d'expansion (3), tout en pouvant tourner par rapport à ce tirant, et en ce que l'extrémité de ce tirant (20) située du côté de l'extrémité libre du rodoir est munie de cannelures propres à recevoir un outil de réglage ou est solidaire d'une pièce (33) comportant de telles cannelures (33a).8. Lapper according to claim 7, characterized in that the ramp ring (19) is axially integral with a tie rod (20) screwed into the end of the expansion cone (3), while being able to rotate relative to this tie rod, and in that the end of this tie rod (20) situated on the side of the free end of the lapping is provided with grooves suitable for receiving an adjustment tool or is integral with a part (33) comprising such splines (33a).
EP82400395A 1981-03-11 1982-03-08 Honing tool with variable granulometry Expired EP0060197B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8105258 1981-03-11
FR8105258A FR2501561A1 (en) 1981-03-11 1981-03-11 VARIABLE GRANULOMETRY RODOR

Publications (2)

Publication Number Publication Date
EP0060197A1 true EP0060197A1 (en) 1982-09-15
EP0060197B1 EP0060197B1 (en) 1984-07-25

Family

ID=9256296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400395A Expired EP0060197B1 (en) 1981-03-11 1982-03-08 Honing tool with variable granulometry

Country Status (3)

Country Link
EP (1) EP0060197B1 (en)
DE (1) DE3260429D1 (en)
FR (1) FR2501561A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5390448A (en) * 1993-04-22 1995-02-21 Sunnen Products Company Modular expandable honing tool
CN102369086A (en) * 2009-03-31 2012-03-07 本田技研工业株式会社 Bore working tool
CN116237826A (en) * 2023-05-11 2023-06-09 四川省卓辰精密机械制造有限公司 Valve piece oilhole grinding tool and grinding device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2294803A1 (en) * 1974-12-21 1976-07-16 Nagel Masch Werkzeug TOOL AND METHOD FOR MACHINING CYLINDRICAL HOLES
FR2356479A1 (en) * 1976-06-28 1978-01-27 Citroen Sa Honing tool with elastic bush - has radial thrusters in lengthwise grooves of bush slotted to allow even expansion

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4188755A (en) * 1978-04-19 1980-02-19 Ex-Cell-O Corporation Expandable abrading tool and abrasive insert and washers thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2294803A1 (en) * 1974-12-21 1976-07-16 Nagel Masch Werkzeug TOOL AND METHOD FOR MACHINING CYLINDRICAL HOLES
FR2356479A1 (en) * 1976-06-28 1978-01-27 Citroen Sa Honing tool with elastic bush - has radial thrusters in lengthwise grooves of bush slotted to allow even expansion

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5390448A (en) * 1993-04-22 1995-02-21 Sunnen Products Company Modular expandable honing tool
CN102369086A (en) * 2009-03-31 2012-03-07 本田技研工业株式会社 Bore working tool
US8690644B2 (en) 2009-03-31 2014-04-08 Honda Motor Co., Ltd. Bore working tool
CN116237826A (en) * 2023-05-11 2023-06-09 四川省卓辰精密机械制造有限公司 Valve piece oilhole grinding tool and grinding device

Also Published As

Publication number Publication date
FR2501561B1 (en) 1985-01-11
FR2501561A1 (en) 1982-09-17
EP0060197B1 (en) 1984-07-25
DE3260429D1 (en) 1984-08-30

Similar Documents

Publication Publication Date Title
BE1010801A3 (en) Drilling tool and / or core.
FR2620960A1 (en) EXPANDABLE HONING OR STONING TOOL
EP1225322A1 (en) Apparatus to centre a tube in a turbine shaft
EP0063976B1 (en) Honing tool
FR2704168A1 (en) Modular expandable honing chuck.
FR2719353A1 (en) Mass compensation device, in particular for a rotary drilling head.
CA2918614C (en) Honing tool for the external surface of a straight cylindrical tube
EP0060197B1 (en) Honing tool with variable granulometry
EP0130592A1 (en) Cutting insert for rotary machining, tool provided with such an insert and method of grinding such an insert
EP1072338B1 (en) Rivet removing tool and process
FR2629380A1 (en) Indexing device for turret lathes and the like
EP0913595A1 (en) Manufacturing method of an inner ring of a metallic ball joint and ball joint so obtained
FR2559901A1 (en) DEVICE AND TOOLING FOR CORRECTING TURBOMACHINE ROTOR BOTTOM AND METHOD FOR IMPLEMENTING THE SAME
EP3600736B1 (en) Clamping chuck with inclined slides
FR2704790A1 (en) Variable-diameter adjustable hole cutter (drum saw)
FR2601276A1 (en) GRINDING, ESPECIALLY GRINDING ON ROD.
FR2752389A1 (en) HONING TOOL INCLUDING A GUIDANCE CUT ZONE THAT CAN BE EXTENDED
FR2517576A1 (en)
FR2741560A1 (en) IMPROVED GRINDER FOR OPHTHALMIC LENSES, AND CORRESPONDING GRINDING MACHINE
FR2687087A1 (en) HONAGE HEAD WITH ADVANCE IN SPIRAL.
FR2686538A1 (en) HONAGE CHUCK.
EP0661136B1 (en) Method for honing the surface of a workpiece and honing tool for carring out said method
EP2688703B1 (en) Process and device for milling-surfacing
FR2515547A1 (en) ABRASIVE TOOL WITH A FIXED DIAMETER ONLY FOR MACHINING A ROTATION BORING AND AXIAL MOVEMENT
EP0337883B1 (en) Centrifugal turbine, in particular impeller wheel, comprising radial rotor blades and an auxiliary turbine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE GB IT

17P Request for examination filed

Effective date: 19820920

ITF It: translation for a ep patent filed

Owner name: FIAMMENGHI - DOMENIGHETTI

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB IT

REF Corresponds to:

Ref document number: 3260429

Country of ref document: DE

Date of ref document: 19840830

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

ITPR It: changes in ownership of a european patent

Owner name: OFFERTA DI LICENZA AL PUBBLICO

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000322

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20000530

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010308

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010331

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010308