EP0646054A1 - Porte-outil a double tourelle pour un tour - Google Patents

Porte-outil a double tourelle pour un tour

Info

Publication number
EP0646054A1
EP0646054A1 EP93912962A EP93912962A EP0646054A1 EP 0646054 A1 EP0646054 A1 EP 0646054A1 EP 93912962 A EP93912962 A EP 93912962A EP 93912962 A EP93912962 A EP 93912962A EP 0646054 A1 EP0646054 A1 EP 0646054A1
Authority
EP
European Patent Office
Prior art keywords
turret
double
drive shaft
tool holder
tool
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.)
Ceased
Application number
EP93912962A
Other languages
German (de)
English (en)
Inventor
Frank Baumbusch
Egon Strathmeier
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.)
PITTLER GmbH
Original Assignee
PITTLER GmbH
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 PITTLER GmbH filed Critical PITTLER GmbH
Publication of EP0646054A1 publication Critical patent/EP0646054A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B5/02—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning hubs or brake drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B3/00—General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines
    • B23B3/16—Turret lathes for turning individually-chucked workpieces
    • B23B3/164—Turret lathes for turning individually-chucked workpieces lathe with one toolslide carrying two or more turret heads
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0061—Other grinding machines or devices having several tools on a revolving tools box
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/16—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings
    • B24B7/17—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings for simultaneously grinding opposite and parallel end faces, e.g. double disc grinders

Definitions

  • the invention relates to a double turret tool holder for a lathe with two turret disks which are mounted coaxially one inside the other and are connected in a rotationally fixed manner but are axially steplessly adjustable relative to one another, with a clamping device for fixing them in certain axial relative positions and with a large number of clamping devices arranged on the circumference ⁇ directions for turning tools used simultaneously in pairs.
  • Such a tool holder is e.g. B. be described in DE 35 28 437 C2 and in German patent application P 42 07 677.3. It offers the possibility of simultaneously machining workpieces to be machined with two tools on opposite sides. The processing time is shortened, but it is more important that thin-walled workpieces such as e.g. B. brake discs for motor vehicles, with the required accuracy.
  • the invention is therefore based on the object of creating a double turret tool holder of the type mentioned at the outset, which is more versatile than previously.
  • axially aligned tool clamping devices are rotatably mounted on at least one point on the circumference of the turret disks and can be coupled by a drive shaft extending between the turret disks.
  • the invention has the advantage that workpieces such. B. brake disks, in a single clamping not only with a very short machining time and without risk of deformation due to one-sided loading on both sides simultaneously machined, but before or after that can also be drilled, milled or ground on one or both sides .
  • the latter in particular, is desirable in order to reduce the surface roughness and to eliminate the spiral groove formed during turning, through which a radial force could be exerted on the brake pads in the case of brake disks.
  • the invention takes into account the restricted space in double revolvers in that only a single drive is available for both rotating tools interacting in pairs.
  • the drive connection between the tools which can be driven in rotation is not arranged coaxially with the rotary bearing of the turret disks, but extends eccentrically between them.
  • the invention consciously accepts that because of the drive shaft, the working area between the two opposite rotating tools is restricted, especially since their diameter gen of the other parts of the double turret can not be large anyway, but the proposed construction is still sufficient to z.
  • a preferred embodiment of the invention provides that the drive shaft is axially fixed to a turret disk is axially displaceable but rotatably engages in the tool clamping device of the other turret disk and can be coupled to an upstream drive shaft arranged in the work station.
  • the latter is expediently engaged and disengaged by axial displacement relative to the turret disk carrying the drive shaft of the tool clamping devices.
  • the double turret tool holder 10 shown in the exemplary embodiment is part of a vertical lathe, of which for the sake of simplicity only one lathe chuck 12 is shown, by means of which the workpieces to be machined, in the example of a motor vehicle brake disc 14, are clamped and during machining are driven in rotation.
  • the double turret tool holder 10 has a rear or upper turret disk 16 and a front or lower turret disc 18, over the circumference of which at least two clamping devices are arranged for turning tools 20, 22 which are used in pairs at the same time, and a clamping device 24 or 26 for an upper grinding wheel 28 or a lower grinding wheel 30.
  • the brake disks 14 With the two pairs of turning tools 20, 22, the brake disks 14 are pre-machined and finished on their main surfaces. These surfaces are then covered by the grinding wheels 28 and 30.
  • the double turret tool holder has other tool clamping devices for turning tools and grinding wheels, z. B. a total of eight rotary switch positions in order to be able to use six pairs of turning tools and two pairs of grinding wheels.
  • Two or more tool clamping devices can be equipped identically with turning or grinding tools in order to extend the time interval between changing the tools.
  • the double turret tool holder 10 has a housing 32 which is fixedly mounted on a cross slide which can be moved in the direction of the X-axis indicated by a double arrow 34 and in the direction of the Z-axis indicated by an arrow 36.
  • the housing 32 essentially contains the bearings, guides, drive parts and locking devices for the two turret disks 16 and 18, reference being made to the older designs mentioned at the beginning for details.
  • a controllable motor 40 which is fixedly mounted on the housing 32, ensures the rotary switching movements according to arrow 38 of the turret disks 16 and 18, which are connected to one another in a rotationally fixed manner.
  • the rear turret disk 16 is mounted by means of a controllable cross, also on the housing 32 or the cross bearing it. slide-mounted motor 44.
  • the tools 20, 28 of the upper turret disk 16 are brought into use on the workpiece 14 by movements of the cross slide carrying the double turret in the direction of the X and Z axes, while the tools 22 , 30 of the lower turret disk 18 are carried along with the movements of the upper turret disk 16, but are given an additional movement and adjustment in the direction of the arrows 36 and 42 by the motor 44, ie along the Z axis and in this way depending on the thickness of the workpieces 14, any desired axial distance from the tools 20 or 28 of the upper turret disk 16 assigned in pairs can be set.
  • the turning tools 20, 22 are clamped in a conventional manner or, as described in patent application P 42 07 677.3, in the revolving discs 16 and 18 and released when the tool is changed.
  • the clamping devices 24 and 26 of the grinding disks 28 and 30, which are rotatably mounted in the turret disks 16 and 18, are axially aligned and are connected in a rotationally fixed manner via a central drive shaft 46.
  • the latter is rotatably but axially fixed in the upper turret disk 16 and extends through the grinding disks 28 and 30 and over the space between the turret disks 16 and 18 with a lower end designed as a multi-groove profile into the lower workpiece clamping device 26 designed with a corresponding hollow profile, so that a relative axial displacement is possible between the drive shaft 46 and the lower workpiece clamping device 26 while maintaining the rotationally fixed connection.
  • the grinding wheels 28 and 30 need only be rotatably driven in the rotary switch position of the double turret tool holder 10 in which, as shown in the drawing, they are located on the workpiece chuck 12 side.
  • the upper end of the drive shaft 46 can be coupled via a releasable coupling 48 to an upstream drive shaft 54 which can be displaced axially in the direction of arrow 52 by a power cylinder 50.
  • the latter can in turn be driven via a gear 56 by a grinding drive motor 58 mounted on the housing 32 or on the cross slide bearing this.
  • a single motor 58 is sufficient for driving them, which can be connected to the driveshaft 54 via the upstream drive shaft 54
  • Drive shafts 46 of the various rotating tool pairs can be coupled.
  • the construction described does not exclude, in individual cases, clamping a tool only in one of two opposite, rotatably mounted and drivable tool clamping devices 24, 26 in order to carry out a specific machining operation on only one side of a workpiece.
  • the grinding disks 28, 30 have a diameter of 150 mm in order to bring the braking surfaces of motor vehicle brake disks with an outer diameter of 286 mm to a surface roughness Ra of 0.7 ⁇ by dry grinding and to eliminate the spiral groove remaining after the previous turning operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

L'invention concerne un porte-outil à double tourelle pour un tour, qui comporte deux disques tourelles (16, 18) solidaires en rotation, montés coaxialement l'un dans l'autre. Ces deux disques tourelles (16, 18) peuvent être déplacés en continu, axialement l'un par rapport à l'autre, par un mécanisme de commande (44) et peuvent être placés dans toutes les positions relatives voulues, par serrage. Afin de pouvoir également usiner des pièces (14) des deux côtés, avec des outils rotatifs, par exemple des meules de rectification (28, 30), des dispositifs de serrage d'outil alignés (24, 26) sont montés rotatifs au moins en un point de la circonférence des disques tourelles (16, 18) et peuvent être accouplés les uns aux autres par un arbre d'entraînement (46) qui s'étend entre les disques tourelles.
EP93912962A 1992-06-20 1993-06-14 Porte-outil a double tourelle pour un tour Ceased EP0646054A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19924220290 DE4220290C2 (de) 1992-06-20 1992-06-20 Doppelrevolver-Werkzeughalter für eine Drehmaschine
DE4220290 1992-06-20
PCT/EP1993/001492 WO1994000260A1 (fr) 1992-06-20 1993-06-14 Porte-outil a double tourelle pour un tour

Publications (1)

Publication Number Publication Date
EP0646054A1 true EP0646054A1 (fr) 1995-04-05

Family

ID=6461492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93912962A Ceased EP0646054A1 (fr) 1992-06-20 1993-06-14 Porte-outil a double tourelle pour un tour

Country Status (3)

Country Link
EP (1) EP0646054A1 (fr)
DE (1) DE4220290C2 (fr)
WO (1) WO1994000260A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430113A1 (de) * 1994-08-25 1996-02-29 Berliner Werkzeugmasch Werkzeugmaschine
US5549023A (en) * 1994-09-29 1996-08-27 Rti Technologies, Inc. On-car disc brake lathe
FR2761915B1 (fr) * 1997-04-15 1999-06-18 Renault Procede et dispositif de realisation de disques de frein
DE19920467C5 (de) * 1999-05-04 2006-08-31 Erwin Junker Maschinenfabrik Gmbh Schleifmaschine, sowie Verfahren zur Bearbeitung eines Werkstückes in einer Schleifmaschine
US6139405A (en) * 1999-01-19 2000-10-31 Ernst Thielenhaus Gmbh & Co. Kg Method of making a motor-vehicle brake-disk assembly
DE102005015649B4 (de) * 2005-04-05 2007-07-05 Emag Holding Gmbh Verfahren zum Drehen und Feinstbearbeiten eines Werkstückes und Vorrichtung zur Durchführung des Verfahrens
EP3504025A1 (fr) 2016-08-25 2019-07-03 Ecoroll Ag Werkzeugtechnik Outil pour disques de frein destiné à l'usinage d'une ébauche de disque de frein, installation de fabrication de disques de frein et procédé pour fabriquer un disque de frein

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL292452A (fr) * 1962-05-12
US3750244A (en) * 1971-03-17 1973-08-07 Textron Inc Turret lathe
DE2128642C3 (de) * 1971-06-09 1979-05-03 Gildemeister Ag, 4800 Bielefeld Werkzeugrevolveranordnung an Revolverdrehmaschinen
DE3528437A1 (de) * 1985-08-08 1987-02-19 Weisser Soehne J G Vorrichtung zum beidseitigen und gleichzeitigen drehen scheibenfoermiger, umlaufender werkstuecke mittels einander gegenueberliegender werkzeuge
DE3676078D1 (de) * 1986-03-07 1991-01-17 Chuang Kuo Huey Getriebe eines revolverkopfes bestehend aus einer zwillingsscheibe fuer cnc-maschinen.
DE4022572A1 (de) * 1990-07-16 1992-01-23 Boehringer Werkzeugmaschinen Drehmaschine mit doppelrevolver
DE9116390U1 (de) * 1991-10-30 1992-10-22 Sauter Feinmechanik GmbH, 7430 Metzingen Werkzeugrevolver

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9400260A1 *

Also Published As

Publication number Publication date
WO1994000260A1 (fr) 1994-01-06
DE4220290A1 (de) 1993-12-23
DE4220290C2 (de) 1994-02-24

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