EP0646054A1 - Double-turret tool-holder for a lathe - Google Patents

Double-turret tool-holder for a lathe

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)
French (fr)
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/en
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)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Turning (AREA)

Abstract

Described is a double-turret tool holder for a lathe, the tool holder having two turret discs (16, 18) mounted coaxially to each other and connected so that they rotate in unison. The two discs can be continuously displaced relative to each other along their longitudinal axis by a control drive (44) and can be clamped at any required relative longitudinal positions. In order to be able to machine workpieces (14) on both sides with rotational tools, e.g. grinding wheels (28, 30), longitudinally aligned tool-clamping devices (24, 26) are rotatably mounted at at least one point on the circumference of the turret discs (16, 18), the tool-clamping devices being coupled to each other by a drive shaft (46) passing through the turret discs.

Description

Doppelrevolver-Werkzeughalter für eine Drehmaschine Double turret tool holder for a lathe
Die Erfindung betrifft einen Doppelrevolver-Werkzeughalter für eine Drehmaschine mit zwei koaxial ineinander gelagerten und drehfest verbundenen, aber axial relativ zueinander stu¬ fenlos verstellbaren Revolverscheiben mit einer Klemmeinrich¬ tung zu ihrer Fixierung in bestimmten axialen Relativstellun¬ gen und mit einer Vielzahl am Umfang angeordneter Spannein¬ richtungen für paarweise gleichzeitig zum Einsatz kommende Drehmeißel.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.
Ein derartiger Werkzeughalter ist z. B. in der DE 35 28 437 C2 und in der deutschen Patentanmeldung P 42 07 677.3 be¬ schrieben. Er bietet die Möglichkeit, durch Drehen zu bear¬ beitende Werkstücke mit zwei Werkzeugen gleichzeitig auf ge¬ genüberliegenden Seiten zu bearbeiten. Dabei wird die Bear¬ beitungszeit verkürzt, wichtiger ist jedoch, daß sich nur auf diese Weise dünnwandige Werkstücke, wie z. B. Bremsscheiben für Kraftfahrzeuge, mit der geforderten Genauigkeit herstel¬ len lassen.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.
Während es bei einfachen Werkzeugrevolvern bekannt ist, neben undrehbar eingespannten Drehmeißeln auch rotierend antreib¬ bare Werkzeuge vorzusehen, dienen bei Drehmaschinen Doppelre¬ volver bisher ausschließlich als Werkzeughalter für Drehmeis- sel, obgleich es in vielen Fällen zweckmäßig wäre, in einer einzigen Werkstückaufspannung außer Dreharbeiten auch z. B. Bohr-, Fräs- oder Schleifarbeiten durchzuführen. Der Verwirk¬ lichung solcher multifunktioneller Doppelrevolver-Werkzeug¬ halter hat bisher offensichtlich die Schwierigkeit entgegen¬ gestanden, daß aus Platzgründen keine Möglichkeit gesehen wurde, zusätzlich zu den schon vorhandenen zahlreichen La¬ gern, Führungen und Antrieben und insbesondere unter Berück¬ sichtigung der relativen Beweglichkeit der beiden Revolver- scheiben an diesen auch noch paarweise zusammenwirkende ro¬ tierende Werkzeuge samt Antrieben zu lagern.While it is known in simple tool turrets to provide not only non-rotatably clamped turning tools, but also tools which can be driven in rotation, turning machines with double turrets have hitherto only served as tool holders for turning tools, although in many cases it would be useful in a single workpiece clamping in addition to turning work e.g. B. to perform drilling, milling or grinding work. The realization of such multifunctional double turret tool holders has apparently been countered by the difficulty that no space was seen for reasons of space, in addition to the numerous bearings, guides and drives already present, and in particular taking into account the relative mobility of the two revolver to store discs which also cooperate in pairs, together with drives.
Der Erfindung liegt deshalb die Aufgabe zugrunde, einen Dop- pelrevolver-Werkzeughalter der eingangs genannten Art zu schaffen, welcher vielseitiger als bisher einsetzbar ist.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.
Vorstehende Aufgabe wird erfindungsgemäß dadurch gelöst, daß an wenigstens einer Stelle des Umfangs der Revolverscheiben axial fluchtende Werkzeug-Spanneinrichtungen drehbar gelagert sind, die durch eine sich zwischen den Revolverscheiben er¬ streckende Antriebswelle kuppelbar sind.The above object is achieved in that 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.
Die Erfindung bietet den Vorteil, daß Werkstücke, wie z. B. Bremsscheiben, in einer einzigen Aufspannung nicht nur mit einer sehr kurzen Bearbeitungszeit und ohne Gefahr der Ver¬ formung durch einseitige Belastung auf beiden Seiten gleich¬ zeitig drehend bearbeitet, sondern davor oder danach auch ein- oder beidseitig gebohrt, gefräst oder geschliffen werden können. Insbesondere letzteres ist zur Verringerung der Ober¬ flächenrauhigkeit und Beseitigung der beim Drehen entstehen¬ den spiraligen Rille erwünscht, durch welche im Falle von Bremsscheiben eine radiale Kraft auf die Bremsbeläge ausgeübt werden könnte.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.
Den beengten Platzverhältnissen bei Doppelrevolvern trägt die Erfindung dadurch Rechnung, daß nur ein einziger Antrieb für beide paarweise zusammenwirkende, rotierende Werkzeuge vor¬ handen ist. Es kommt hinzu, daß die Antriebsverbindung zwi¬ schen den rotierend antreibbaren Werkzeugen nicht koaxial zum Drehlager der Revolverscheiben angeordnet ist, sondern sich exzentrisch zwischen diesen erstreckt. Die Erfindung nimmt dabei bewußt in Kauf, daß wegen der Antriebswelle der Ar¬ beitsbereich zwischen den beiden gegenüberliegenden rotieren¬ den Werkzeugen eingeschränkt ist, zumal deren Durchmesser we- gen der übrigen Teile des Doppelrevolvers ohnehin nicht groß sein kann, aber die vorgeschlagene Konstruktion reicht den¬ noch aus, um z. B. Bremsscheiben zu überschleifen und ermög¬ licht überhaupt erst die raumsparende Bauweise eines Doppel¬ revolver-Werkzeughalters.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. In addition, 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. B. brake discs and only makes the space-saving design of a double turret tool holder possible.
Um die Masse des drehschaltbaren Teils des Doppelrevolvers möglichst klein zu halten, insbesondere dann, wenn dieser mehrere axial fluchtend gegenüberliegende, rotierend antreib¬ bare Werkzeug-Spannfutter aufweist, ist in bevorzugter Ausge¬ staltung der Erfindung vorgesehen, daß die Antriebswelle an einer Revolverscheibe axial festgelegt ist, axial verschieb- lich, aber drehfest in die Werkzeug-Spanneinrichtung der an¬ deren Revolverscheibe eingreift und mit einer in der Arbeits¬ station angeordneten, vorgelagerten Antriebswelle kuppelbar ist. Die letztere wird zweckmäßigerweise durch axiale Ver¬ schiebung relativ zu der die Antriebswelle der Werkzeug- Spanneinrichtungen tragenden Revolverscheibe ein- und ausge¬ kuppelt.In order to keep the mass of the rotatably switchable part of the double turret as small as possible, in particular if it has a plurality of axially opposite, rotationally drivable tool chucks, 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.
Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert, welche in vereinfachter Dar¬ stellung eine Seitenansicht und teilweise Schnittansicht ei¬ nes Doppelrevolver-Werkzeughalters mit senkrechter Drehachse zeigt.An embodiment of the invention is explained in more detail below with reference to the drawing, which shows a simplified side view and partial sectional view of a double turret tool holder with a vertical axis of rotation.
Der im Ausführungsbeispiel gezeigte Doppelrevolver-Werkzeug¬ halter 10 ist Teil einer Vertikal-Drehmaschine, von welcher der Einfachheit halber im übrigen nur ein Drehfutter 12 ge¬ zeigt ist, mittels dessen die zu bearbeitenden Werkstücke, im Beispielsfall Kraftfahrzeug-Bremsscheiben 14, gespannt und während der Bearbeitung rotierend angetrieben werden.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.
Der Doppelrevolver-Werkzeughalter 10 hat eine hintere bzw. obere Revolverscheibe 16 und eine vordere bzw. untere Revol- verscheibe 18, über deren Umfang verteilt jeweils mindestens zwei Spanneinrichtungen für jeweils paarweise gleichzeitig zum Einsatz kommende Drehmeißel 20, 22 sowie eine Spannein¬ richtung 24 bzw. 26 für eine obere Schleifscheibe 28 bzw. eine untere Schleifscheibe 30 angeordnet sind. Mit den beiden Paaren von Drehmeißeln 20, 22 werden die Bremsscheiben 14 auf ihren Hauptflächen vorbearbeitet und geschlichtet. Anschlies- send werden diese Flächen dann mittels der Schleifscheiben 28 und 30 überschlieffen.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. 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.
Vorzugsweise hat der Doppelrevolver-Werkzeughalter am Umfang noch weitere Werkzeug-Spanneinrichtungen für Drehmeißel und Schleifscheiben, z. B. insgesamt acht Drehschaltstellungen, um sechs Paare von Drehmeißeln und zwei Paare von Schleif¬ scheiben zum Einsatz bringen zu können. Dabei können zwei oder mehr Werkzeug-Spanneinrichtungen identisch mit Dreh¬ oder Schleifwerkzeugen bestückt werden, um das zeitliche In¬ tervall zwischen dem Auswechseln der Werkzeuge zu verlängern.Preferably, 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.
Bei dem Ausführungsbeispiel hat der Doppelrevolver-Werkzeug¬ halter 10 ein Gehäuse 32, welches fest auf einem in Richtung der durch einen Doppelpfeil 34 angezeigten X-Achse und in Richtung der durch einen Pfeil 36 angedeuteten Z-Achse ver¬ fahrbaren Kreuzschlitten gelagert ist. Das Gehäuse 32 enthält im wesentlichen die Lager, Führungen, Antriebsteile und Fest¬ stelleinrichtungen für die beiden Revolverscheiben 16 und 18, wobei zu Einzelheiten auf die eingangs genannten älteren Kon¬ struktionen Bezug genommen wird. Für die Drehschaltbewegungen entsprechend Pfeil 38 der drehfest miteinander verbundenen Revolverscheiben 16 und 18 sorgt ein fest am Gehäuse 32 gela¬ gerter, steuerbarer Motor 40. Die durch einen Pfeil 42 ange¬ deutete axiale Einstellbarkeit der vorderen Revolverscheibe 18 relativ zu der axial fest im Gehäuse 32 gelagerten hinte¬ ren Revolverscheibe 16 erfolgt mittels eines steuerbaren, ebenfalls am Gehäuse 32 oder dem dieses tragenden Kreuz- schlitten gelagerten Motors 44. Unter den geschilderten Be¬ dingungen werden die Werkzeuge 20, 28 der oberen Revolver¬ scheibe 16 durch Verfahrbewegungen des den Doppelrevolver tragenden Kreuzschlittens in Richtung der X- und Z-Achse zum Einsatz am Werkstück 14 gebracht, während die Werkzeuge 22, 30 der unteren Revolverscheibe 18 bei den Bewegungen der obe¬ ren Revolverscheibe 16 mitgenommen werden, aber durch den Mo¬ tor 44 eine zusätzliche Bewegung und Einstellung in Richtung der Pfeile 36 bzw. 42, d. h. längs der Z-Achse erhalten und auf diese Weise je nach Dicke der Werkstücke 14 auf einen be¬ liebigen gewünschten axialen Abstand zu den jeweils paarweise zugeordneten Werkzeugen 20 bzw. 28 der oberen Revolverscheibe 16 eingestellt werden können.In the exemplary embodiment, 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 axial adjustability of the front turret disk 18, indicated by an arrow 42, relative to that axially fixed in the housing 32 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. Under the conditions described, 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.
Es besteht selbstverständlich die weitere Möglichkeit, daß nicht der Doppelrevolver-Werkzeughalter 10, sondern das Dreh¬ spannfutter 12 die Bewegungen längs der X-Achse ausführt.There is of course the further possibility that it is not the double turret tool holder 10 but the rotary chuck 12 which executes the movements along the X axis.
Die Drehmeißel 20, 22 werden in herkömmlicher Weise oder, wie in der Patentanmeldung P 42 07 677.3 beschrieben, in den Re¬ volverscheiben 16 und 18 gespannt und beim Werkzeugwechsel gelöst. Die in den Revolverscheiben 16 bzw. 18 drehbar gela¬ gerten Spanneinrichtungen 24 bzw. 26 der Schleifscheiben 28 bzw. 30 fluchten axial und sind drehfest verbunden über eine zentrale Antriebswelle 46. Diese ist in der oberen Revolver¬ scheibe 16 drehbar, aber axial fest gelagert und erstreckt sich durch die Schleifscheiben 28 und 30 hindurch und über den Zwischenraum zwischen den Revolverscheiben 16 und 18 hin¬ weg mit einem als Vielnutprofil ausgebildeten unteren Ende in die mit einem entsprechenden Hohlprofil ausgebildete untere Werkstück-Spanneinrichtung 26, so daß eine relative Axialver¬ schiebung zwischen der Antriebswelle 46 und der unteren Werk¬ stück-Spanneinrichtung 26 unter Aufrechterhaltung der drehfe¬ sten Verbindung möglich ist. Die Schleifscheiben 28 und 30 brauchen nur in derjenigen Drehschaltstellung des Doppelrevolver-Werkzeughalters 10 ro¬ tierend angetrieben zu werden, in welcher sie sich, wie in der Zeichnung gezeigt, auf Seiten des Werkstückfutters 12 be¬ finden. Daher ist das obere Ende der Antriebswelle 46 über eine lösbare Kupplung 48 mit einer vorgelagerten, durch einen Kraftzylinder 50 axial in Pfeilrichtung 52 verschieblichen Antriebswelle 54 kuppelbar. Die letztere ist ihrerseits über ein Getriebe 56 durch einen am Gehäuse 32 bzw. an dem dieses tragenden Kreuzschlitten gelagerten Schleifantriebsmotor 58 antreibbar. Auch wenn am Umfang der Revolverscheiben 16, 18 mehrere Paare von Werkstück-Spanneinrichtungen 24, 26 für ro¬ tierend antreibbare Werkzeuge 28, 30 vorhanden sind, genügt für deren Antrieb ein einziger Motor 58, der über die vorge¬ lagerte Antriebswelle 54 wahlweise mit den Antriebswellen 46 der verschiedenen rotierenden Werkzeugpaare kuppelbar ist.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. Therefore, 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. Even if there are several pairs of workpiece clamping devices 24, 26 for tools 28, 30 which can be driven in rotation on the circumference of the turret disks 16, 18, 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.
Im übrigen schließt es die beschriebene Konstruktion nicht aus, im Einzelfall nur in eine von zwei paarweise gegenüber¬ liegenden, drehbar gelagerten und antreibbaren Werkzeug- Spanneinrichtungen 24, 26 ein Werkzeug einzuspannen, um nur auf einer Seite eines Werkstücks eine bestimmte Bearbeitung auszuführen.Otherwise, 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.
In einem konkreten Ausführungsbeispiel haben die Schleif¬ scheiben 28, 30 einen Durchmesser von 150 mm, um die Brems¬ flächen von Kraftfahrzeug-Bremsscheiben mit einem Außendurch¬ messer von 286 mm durch Trockenschleifen auf eine Oberflä¬ chenrauhigkeit Ra von 0,7 μ zu bringen und dabei die nach der vorangegangenen Drehbearbeitung zurückgebliebene spiralför¬ mige Rille zu beseitigen. In a specific exemplary embodiment, 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 μ by dry grinding and to eliminate the spiral groove remaining after the previous turning operation.

Claims

-1-Patentansprüche -1 claims
1. Doppelrevolver-Werkzeughalter für eine Drehmaschine mit zwei koaxial ineinander gelagerten und drehfest verbun¬ denen, aber axial relativ zueinander stufenlos verstell¬ baren Revolverscheiben mit einer Klemmeinrichtung zu ih¬ rer Fixierung in bestimmten axialen Relativstellungen und mit einer Vielzahl am Umfang angeordneter Spanneinrich¬ tungen für paarweise gleichzeitig zum Einsatz kommende Drehmeißel, dadurch gekennzeichnet, daß an wenigstens ei¬ ner Stelle des Umfangs der Revolverscheiben (16, 18) axial fluchtende Werkzeug-Spanneinrichtungen (24, 26) drehbar gelagert sind, die durch eine sich zwischen den Revolverscheiben erstreckende Antriebswelle (46) kuppel¬ bar sind.1. Double turret tool holder for a lathe with two coaxially interlocking and non-rotatably connected, but axially steplessly adjustable turret disks with a clamping device for fixing them in certain axial relative positions and with a large number of clamping devices arranged on the circumference for pairs of turning tools used at the same time, characterized in that axially aligned tool clamping devices (24, 26) are rotatably mounted on at least one point on the circumference of the turret disks (16, 18) and are driven by a drive shaft extending between the turret disks (46) can be coupled.
2. Doppelrevolver-Werkzeughalter nach Anspruch 1 , dadurch gekennzeichnet, daß die rotierend antreibbaren Werkzeug- Spanneinrichtungen (24, 26) zum Spannen von Schleifschei¬ ben (28, 30) mit stirnseitig gegenüberliegenden Schleif¬ flächen ausgelegt sind.2. Double turret tool holder according to claim 1, characterized in that the rotatably drivable tool clamping devices (24, 26) are designed for clamping grinding wheels (28, 30) with opposite grinding surfaces on the end face.
3. Doppelrevolver-Werkzeughalter nach Anspruch 1 oder 2, da¬ durch gekennzeichnet, daß die Antriebswelle (46) an einer Revolverscheibe (16) axial festgelegt ist und axial ver- schieblich, aber drehfest in die Werkzeug-Spanneinrich¬ tung (26) der anderen Revolverscheibe (18) eingreift.3. Double turret tool holder according to claim 1 or 2, characterized in that the drive shaft (46) is axially fixed to a turret disk (16) and axially displaceable but non-rotatably in the tool clamping device (26) engages another turret disk (18).
4. Doppelrevolver-Werkzeughalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Antriebswelle (46) mit einer in der Arbeitsposition angeordneten, vorgela¬ gerten Antriebswelle (54) kuppelbar ist. 4. Double turret tool holder according to one of claims 1 to 3, characterized in that the drive shaft (46) can be coupled to a drive shaft (54) arranged in the working position, vorgela¬ ger.
5. Doppelrevolver-Werkzeughalter nach Anspruch 4, dadurch gekennzeichnet, daß die vorgelagerte Antriebswelle (54) durch axiale Verschiebung relativ zu der die Antriebs¬ welle (46) der Werkzeug-Spanneinrichtungen (24, 26) tra¬ genden Revolverscheibe (16) kuppelbar ist. 5. Double turret tool holder according to claim 4, characterized in that the upstream drive shaft (54) can be coupled by axial displacement relative to the drive shaft (46) of the tool clamping devices (24, 26) carrying turret disc (16) .
EP93912962A 1992-06-20 1993-06-14 Double-turret tool-holder for a lathe Ceased EP0646054A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4220290 1992-06-20
DE19924220290 DE4220290C2 (en) 1992-06-20 1992-06-20 Double turret tool holder for a lathe
PCT/EP1993/001492 WO1994000260A1 (en) 1992-06-20 1993-06-14 Double-turret tool-holder for a lathe

Publications (1)

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

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DE (1) DE4220290C2 (en)
WO (1) WO1994000260A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430113A1 (en) * 1994-08-25 1996-02-29 Berliner Werkzeugmasch Tool machine for rotationally symmetrical work pieces
US5549023A (en) * 1994-09-29 1996-08-27 Rti Technologies, Inc. On-car disc brake lathe
FR2761915B1 (en) * 1997-04-15 1999-06-18 Renault METHOD AND DEVICE FOR PRODUCING BRAKE DISCS
DE19920467C5 (en) * 1999-05-04 2006-08-31 Erwin Junker Maschinenfabrik Gmbh Grinding machine, and method for processing a workpiece in a grinding machine
US6139405A (en) * 1999-01-19 2000-10-31 Ernst Thielenhaus Gmbh & Co. Kg Method of making a motor-vehicle brake-disk assembly
DE102005015649B4 (en) * 2005-04-05 2007-07-05 Emag Holding Gmbh Method for turning and micromachining a workpiece and apparatus for carrying out the method
WO2018036858A1 (en) * 2016-08-25 2018-03-01 Ecoroll Ag Werkzeugtechnik Brake disc tool for machining a brake disc blank, brake disc production plant and method for producing a brake disc

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL292452A (en) * 1962-05-12
US3750244A (en) * 1971-03-17 1973-08-07 Textron Inc Turret lathe
DE2128642C3 (en) * 1971-06-09 1979-05-03 Gildemeister Ag, 4800 Bielefeld Tool turret arrangement on turret lathes
DE3528437A1 (en) * 1985-08-08 1987-02-19 Weisser Soehne J G Device for the simultaneous turning on both sides of disc-shaped revolving workpieces by means of tools situated opposite one another
EP0236603B1 (en) * 1986-03-07 1990-12-05 Kuo-Huey Chuang A twin disc type tool turret mechanism for cnc machines
DE4022572A1 (en) * 1990-07-16 1992-01-23 Boehringer Werkzeugmaschinen LATHE WITH DOUBLE REVOLVER
DE9116390U1 (en) * 1991-10-30 1992-10-22 Sauter Feinmechanik GmbH, 7430 Metzingen Tool turret

Non-Patent Citations (1)

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

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DE4220290A1 (en) 1993-12-23
DE4220290C2 (en) 1994-02-24
WO1994000260A1 (en) 1994-01-06

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