EP0434533B1 - Maschine zum Supfinieren von Wellen, insbesondere Nockenwellen - Google Patents

Maschine zum Supfinieren von Wellen, insbesondere Nockenwellen Download PDF

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Publication number
EP0434533B1
EP0434533B1 EP19900403620 EP90403620A EP0434533B1 EP 0434533 B1 EP0434533 B1 EP 0434533B1 EP 19900403620 EP19900403620 EP 19900403620 EP 90403620 A EP90403620 A EP 90403620A EP 0434533 B1 EP0434533 B1 EP 0434533B1
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EP
European Patent Office
Prior art keywords
arms
machine
abrasive
shaft
arm
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.)
Expired - Lifetime
Application number
EP19900403620
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English (en)
French (fr)
Other versions
EP0434533A1 (de
Inventor
Jean-Claude Pineau
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.)
Procedes Machines Speciales S P M S Ste
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Procedes Machines Speciales S P M S Ste
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Publication date
Application filed by Procedes Machines Speciales S P M S Ste filed Critical Procedes Machines Speciales S P M S Ste
Publication of EP0434533A1 publication Critical patent/EP0434533A1/de
Application granted granted Critical
Publication of EP0434533B1 publication Critical patent/EP0434533B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/18—Accessories
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • B24B19/12—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding cams or camshafts

Definitions

  • the present invention relates to a machine for machining abrasive superfinishing of the bearing surfaces of shafts, in particular cams or cams and trunnions of a camshaft, the shaft being taken between centers and driven by a movement of rotation around 50h axis during machining, this machine comprising a plurality of arms mounted on the same support so as to be able to pivot in parallel planes perpendicular to the axis of the shaft to be machined, the arms being distributed in two groups on either side of the shaft so as to be able to pivot around two spaced parallel axes, each arm comprising an operating and pressure means for applying an abrasive with a predetermined pressure against one of the surfaces to be machined from tree.
  • canopies comprising, for each span to be machined, two opposite arms pivoting in opposition under the action of a common operating means such as a jack, each of said two arms carrying at least one means of applying an abrasive strip so that when the two arms are tightened under the action of the operating means, the application means press an abrasive strip from two opposite sides against the range to be machined.
  • the abrasive belts are generally advanced step by step. , the strips being stationary during the actual machining.
  • the present invention relates to a machine for superfinishing machining by a simple and compact structure, allowing the simultaneous machining of several spans even very close together on the same shaft.
  • the invention also relates to a machine for superfinishing machining by grinding with continuous unwinding of the abrasive belts during machining.
  • the subject of the invention is also a machine for superfinishing machining by grinding allowing a simple and rapid replacement of the abrasive belts and eliminating the losses of belt when changing the abrasive belts.
  • the machine for machining abrasive superfinishing of the bearings of a shaft in particular cams or cams or trunnions of a camshaft, the shaft being taken between centers and driven by a movement of rotation about their axis during machining, comprises a plurality of arms mounted on the same support so as to be able to pivot in parallel planes perpendicular to the axis of the camshaft to be machined.
  • the arms are distributed in two groups on either side of the camshaft so as to be able to pivot around two spaced parallel axes.
  • Each arm comprises an operating and pressure means for applying an abrasive with a predetermined pressure against one of the surfaces to be machined from the shaft.
  • an abrasive belt unwound from a new tape supply reel and rewound on a worn tape take-up reel is associated with each of said arms.
  • Each of said arms comprises means for applying an abrasive strip against the surface to be machined.
  • the machine comprises common means for the continuous drive, during machining, of all the coils receiving the abrasive belts.
  • each arm is equipped with means for the removable reception of a removable cassette containing a supply reel and a reel for receiving an abrasive strip and comprising a roller for applying this strip against the surface to be machined, as well as means for coupling the take-up reel of the cassette with said common drive means.
  • Said coupling means may comprise a shaft end mounted in rotation in said arm and carrying on one side of the arm elements for coupling with the take-up reel of the cassette and on the other side of the arm a wheel or pulley connected by a belt or transmission similar to a wheel or pulley of a common drive shaft for the cassette reels of all the arms, this shaft serving as a pivot axis for all the arms located on one side of the shaft to be machined.
  • the arms being distributed over two pivot axes arranged on both sides of the shaft to be machined, the two pivot axes consist of two drive shafts connected together by a belt transmission or the like.
  • each arm can also be simply fitted with an abrasive tape application roller, in which case the abrasive belts are removed from untrained supply coils, mounted on an axis. common, and are rewound on driven take-up coils mounted on a drive shaft common to the coils of the abrasive belts for all the arms of the machine.
  • the arms are distributed on either side of the shaft to be machined in such a way that the means of applying an abrasive strip intended for machining the successive bearings of the shaft are supported in alternating from opposite sides of the shaft against the surfaces to be machined. This arrangement ensures minimal bending of the shaft during machining.
  • the arms can advantageously be pivotally mounted around the two axes so that each time two arms pivot in the same plane passing between two successive surfaces to be machined, the means for applying the abrasive strip being arranged on the opposite sides of said arms.
  • a superfinishing machine by grooming for the simultaneous machining of all the camshaft cams comprises a headstock 1 and a tailstock 2 making it possible to take a camshaft 3 between points in horizontal position, means not shown being provided elsewhere for driving the camshaft 3 in rotation about its axis.
  • the doll 1 and the tailstock 2 are also driven in an oscillating movement back and forth along their axis, as is well known for grooming.
  • camshaft 3 comprising eight cams 4 a and 4 h in the example shown is installed a grooming assembly 5 mounted in a fixed position on a machine frame 6.
  • the grooming assembly 5 comprises, as shown in FIG. 2, two vertical, parallel, spaced flanges 7, between which eight arms 8 a at 8 h are pivotally mounted around two horizontal axes 9 a and 9 b extending, as shown in Figure 1, in the same horizontal plane located above the axis of the headstock 1 and the tailstock 2, parallel to this axis, in a symmetrical position on either side of a passing vertical plane by said axis.
  • the two axes 9 a and 9 b consist of two shafts, the two ends of which are mounted in rotation in the flanges 7.
  • the arms 8 a to 8 h are distributed over the two shafts 9 a and 9 b in such a way that four arms 8 a , 8 c , 8 e and 8 g are located on the shaft 9 a and the four other arms 8 b , 8 d , 8 f and 8 h on the shaft 9 b , so that the arms are opposite in pairs of arms 8 a / 8 b , 8 c / 8 d , 8 e / 8 f and 8 g / 8 h rotating in parallel planes.
  • the arm 8 carries, at its lower end, a cassette 10 containing an abrasive strip 11 which can be unwound from a supply reel 12 to be rewound on a take-up reel 13 after passing over an application roller 14 at the place where the abrasive strip is exposed towards the outside of the cassette 10.
  • the latter is arranged on one side of the arm 8 in such a way that the application roller 14 is at the height of the camshaft 3 and is turned towards this last.
  • the cassette 10 is removably connected to the arm 8 by means not shown, comparable to those well known for maintaining cassettes in other applications.
  • the arm 8 For the purpose of rotating the take-up reel 13 of the cassette 10, the arm 8 carries, as shown in FIG. 2, a shaft end 15 rotatably mounted in the arm 8 and bearing on one side of the arm 8 of the coupling means not shown for the take-up reel 15 of the cassette 10 and on the other side of the arm 8 a pulley 16.
  • the pulley 16 is connected by a belt 17 to a pulley 18 fixed on the shaft 9 around which the arm 8 is pivotally mounted.
  • the two shafts 9 a and 9 b also each carry a pulley 19 for the purpose of coupling them by a transmission belt 20.
  • a geared motor 21 fixed on one of the flanges 7 and coupled with the shaft 9 b thus ensures the rotational drive, by means of belt transmissions 20 and 17, of the receiving coils 15 of the cassettes 10 of all the arms 8 and consequently abrasive belts 11 contained in the cassettes 10.
  • FIGS 3 and 4 illustrate another embodiment of a superfinishing machine according to the invention which, while having the same general structure as the machine according to Figures 1 and 2, differs from the latter by the fact that the abrasive belts 11 are not presented in cassettes detachably attached to the arm; the abrasive belts 11 intended for the machining of the different cams 4 a to 4 h of the camshaft 3 are here withdrawn from supply coils 23 a to 23 h mounted on a common axis 24 and are rewound on receiving coils 25 a at 25 h mounted on a common shaft 26 driven in rotation by a geared motor 27.
  • Each arm 8 a to 8 g controlled by its jack 22 carries at its lower end an application tool 28 a to 28 g comprising guide pulleys for the strip 11 and an application roller 29 for pressing the abrasive strip 11 against the concerned cam 4 of the shaft 3.
  • the mounting method shown and described with arms 8 pivotally mounted on two axes 9 a , 9 b so that the abrasive band application rollers intended for the machining of successive cams are pressed alternately from the sides opposite of the shaft against the cams to be machined has the advantage of avoiding bending of the shaft as it could occur in the event of different distribution of the arms on the two axes and especially in the case of mounting of all the arms on the same axis, that is to say of the support of all the abrasive band application rollers from the same side against the shaft to be machined.
  • the machine according to the invention can also be used, not only for the simultaneous superfinishing of the cams of a camshaft, but also for example for the simultaneous superfinishing of several bearings on other shafts, for example gearbox shafts of speed.
  • it is more particularly the simultaneous superfinishing of several eccentric and / or non-circular spans on the same shaft which has hitherto constituted a difficult or even impossible problem to solve, in particular when these spans are very close together as is the case on camshafts.

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

Claims (7)

  1. Bearbeitungsmaschine zum Supfinieren der Laufflächen einer Welle durch Schleifen, insbesondere der Nocken (4) oder der Nocken und Lagerzapfen einer Nockenwelle, wobei die Welle während der Bearbeitung zwischen Spitzen (1, 2) gefaßt und mit einer Drehbewegung um ihre Achse beaufschlagt wird,
       mit mehreren Armen (8), die auf demselben Träger (7) so montiert sind, daß sie in zur Achse der zu bearbeitenden Welle senkrechten parallelen Ebenen verschwenkbar sind, und die (8) in zwei Gruppen (8a, 8c, 8e, 8g; 8b, 8d, 8f, 8h) unterteilt sind, die zu beiden Seiten der Welle so angeordnet sind, daß sie um zwei im Abstand voneinander angeordnete parallele Wellen (9a, 9b) verschwenkbar sind, wobei jeder Arm ein Betätigungs- und Andruckmittel (22) aufweist, um ein Schleifmittel (11) mit einem vorbestimmten Druck gegen eine der zu bearbeitenden Laufflächen der Welle anzudrücken,
       dadurch gekennzeichnet,
       daß jedem der genannten Arme (8) ein Schleifband (11) zugeordnet ist, das von einer Vorratsspule (12, 23) für neues Band abgewickelt und auf eine Aufwickelspule (13, 25) für gebrauchtes Band aufgewickelt wird,
       daß jeder Arm (8) ein Andruckmittel (14, 29) zum Andrücken von Schleifband gegen die zu bearbeitenden Lauffläche (4) aufweist
       und daß die Maschine gemeinsame Antriebsmittel für den kontinuierlichen Antrieb aller Aufwickelspulen (13, 25) für die Schleifbänder während der Bearbeitung umfaßt.
  2. Bearbeitungsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß jeder Arm (8) mit Mitteln für die lösbare Aufnahme einer abnehmbaren Kassette (10) ausgestattet ist, die eine Vorratsspule (12) und eine Aufwickelspule (13) für Schleifband, eine Rolle (14) zum Andrücken des Schleifbands gegen die zu bearbeitende Lauffläche sowie Kupplungsmittel zum Kuppeln der Aufwickelspule der Kassette mit den genannten Antriebsmitteln enthält.
  3. Bearbeitungsmaschine nach Anspruch 2, dadurch gekennzeichnet, daß die Kupplungsmittel einen Wellenzapfen (15) umfassen, der drehbar an dem Arn (8) gelagert ist und auf einer Seite des Arms Kupplungselemente für die Kupplung mit der Aufwickelspule (13) der Kassette und auf der anderen Seite des Arms ein Rad oder eine Riemenscheibe (16) aufweist, das bzw. die durch einen Riemen (17) oder ein analoges Transmissionsmittel mit einem Rad oder einer Riemenscheibe (18) einer für die Aufwickelspulen der Kassetten aller Arme gemeinsamen Antriebswelle (9) verbunden ist, die als Schwenkachse für alle Arme (8) dient, die sich auf einer Seite der zu bearbeitenden Welle befinden.
  4. Bearbeitungsmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die beiden Schwenkachsen (9a, 9b) der beiden Gruppen von Armen (8) aus zwei Antriebswellen bestehen, die durch eine Riemen- oder eine analoge Transmission (19, 20) miteinander verbunden sind.
  5. Bearbeitungsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß jeder Arm (8) mit einer Schleifband-Andruckrolle (29) ausgestattet ist und daß alle den einzelnen Armen zugeordneten Schleifbänder (11) von auf einer gemeinsamen Achse montierten, nicht angetriebenen Vorratsspulen (24) abgezogen und auf angetriebene Aufwickelspulen (25) aufgewickelt werden, die auf einer den Schleifband-Aufwickelspulen für alle Arme der Maschine gemeinsamen Antriebswelle (26) montiert sind.
  6. Bearbeitungsmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Arme (8) zu beiden Seiten der zu bearbeitenden Welle (3) so verteilt sind, daß die Andruckmittel (14, 29) zum Andrücken der zum Bearbeiten der aufeinanderfolgenden Laufflächen (4) der Welle bestimmten Schleifbänder von den entgegengesetzten Seiten der Welle aus abwechselnd gegen die zu bearbeitenden Laufflächen gedrückt werden.
  7. Bearbeitungsmaschine nach Anspruch 7, dadurch gekennzeichnet, daß die Arme (8) um die genannten beiden Achsen (9a, 9b) derart schwenkbar montiert sind, daß jedesmal zwei Arme (8a, 8c, 8e, 8g; 8b, 8d, 8f, 8h) in ein und derselben Ebene verschwenkt werden, die durch zwei aufeinanderfolgende zu bearbeitende Laufflächen verläuft, wobei die Andruckmittel (14, 29) zum Andrücken der Schleifbänder auf den entgegengesetzten Seiten der beiden Arme angeordnet sind.
EP19900403620 1989-12-19 1990-12-17 Maschine zum Supfinieren von Wellen, insbesondere Nockenwellen Expired - Lifetime EP0434533B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8916826A FR2655900B1 (fr) 1989-12-19 1989-12-19 Machine de superfinition pour des arbres, notamment des arbres a cames.
FR8916826 1989-12-19

Publications (2)

Publication Number Publication Date
EP0434533A1 EP0434533A1 (de) 1991-06-26
EP0434533B1 true EP0434533B1 (de) 1993-09-15

Family

ID=9388704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900403620 Expired - Lifetime EP0434533B1 (de) 1989-12-19 1990-12-17 Maschine zum Supfinieren von Wellen, insbesondere Nockenwellen

Country Status (4)

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EP (1) EP0434533B1 (de)
DE (1) DE69003366T2 (de)
ES (1) ES2044499T3 (de)
FR (1) FR2655900B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4328006C1 (de) * 1993-08-20 1994-08-04 Thielenhaus Ernst Kg Maschine für die zweistufige Bearbeitung von vorgeschliffenen Wellen, insbesondere von Kraftfahrzeug-Nockenwellen, durch Finishschleifen
FR2724862B1 (fr) * 1994-09-28 1996-12-27 Abramatic Machine d'usinage, en particulier de microfinition, pour arbres a cames
JP2820059B2 (ja) * 1995-03-24 1998-11-05 トヨタ自動車株式会社 研摩装置
JP3661712B2 (ja) * 1995-11-13 2005-06-22 トヨタ自動車株式会社 ラップ加工装置
JPH11285958A (ja) 1998-04-03 1999-10-19 Toyota Motor Corp 研摩装置
DE102015010942B4 (de) * 2015-08-18 2023-11-09 Emag Holding Gmbh Verfahren und Vorrichtung zur Schleif- und Feinstbearbeitung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1076581A (fr) * 1953-04-30 1954-10-27 Machine destinée à exécuter la finition et le polissage des cames
DE1950839A1 (de) * 1969-10-09 1971-05-13 Peter Nagel Vorrichtung zum Finishen von Werkstuecken mit nicht rotationssymmetrischer Form
DE3011454C2 (de) * 1980-03-25 1984-04-05 Ernst Thielenhaus KG, 5600 Wuppertal Verfahren für die Fertigbearbeitung von Nockenwellen
DE3011455C2 (de) * 1980-03-25 1982-08-19 Ernst Thielenhaus KG, 5600 Wuppertal Maschine für die zweistufige Fertigbearbeitung der geschliffenen Nocken von Nockenwellen
DE8607694U1 (de) * 1986-03-20 1988-07-07 Maschinenfabrik Ernst Thielenhaus GmbH, 5600 Wuppertal Schleifmaschine für das Schleifen von langgestreckten Werkstücken

Also Published As

Publication number Publication date
FR2655900A1 (fr) 1991-06-21
DE69003366D1 (de) 1993-10-21
FR2655900B1 (fr) 1995-01-20
EP0434533A1 (de) 1991-06-26
DE69003366T2 (de) 1994-02-03
ES2044499T3 (es) 1994-01-01

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