GB2159450A - Machine tool with two workpiece spindles - Google Patents

Machine tool with two workpiece spindles Download PDF

Info

Publication number
GB2159450A
GB2159450A GB8513396A GB8513396A GB2159450A GB 2159450 A GB2159450 A GB 2159450A GB 8513396 A GB8513396 A GB 8513396A GB 8513396 A GB8513396 A GB 8513396A GB 2159450 A GB2159450 A GB 2159450A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
spindle
machine tool
indexable
axis
spindles
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
GB8513396A
Other versions
GB8513396D0 (en )
GB2159450B (en )
Inventor
Erhard Schalles
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.)
DMG Mori AG
Original Assignee
DMG Mori AG
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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/01Frames, beds, pillars or like members; Arrangement of ways
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B3/00General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines
    • B23B3/06Turning-machines or devices characterised only by the special arrangement of constructional units
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q39/00Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
    • B23Q39/04Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being arranged to operate simultaneously at different stations, e.g. with an annular work-table moved in steps
    • B23Q39/048Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being arranged to operate simultaneously at different stations, e.g. with an annular work-table moved in steps the work holder of a work station transfers directly its workpiece to the work holder of a following work station

Abstract

In a machine tool, machining operation can be effected by a tool carrier (9) on workpieces held in a chuck (4) of a first spindle (3) and a chuck of a second spindle (14) coaxial with and opposed to the first spindle (3). A spindle housing (13) mounting the spindle (14) can be indexed through 180 DEG about an axis normal to the axis (10) of the first (3) and second (14) spindles so that the workpiece held in the chuck of the spindle (14) can be machined by a tool carrier (17). The housing (13) may have a workpiece carrier at each of its ends. <IMAGE>

Description

SPECIFICATION Machine tool with two workpiece spindles The invention relates to a machine tool comprising a drivable first spindle for carrying workpieces being machined, a second spindle which is disposed in opposite relationship to the first spindle, at least one of the spindles being mounted in a spindle housing which is movable in the longitudinal direction, and two tool carriers.

A machine of this kind is disclosed in German Published Specification No 30 35 451. The arrangement of the spindles and tool carriers used in that machine provides a very corn pact design and per mits each tool carrier to be used on each spindle.

Particularly when dealing with materials producing a long chip however that design may give rise to problems as each tool carrier is disposed in the chip region of the other. In addition, the compact construction impedes accessibility to the tool carriers and to clamping chucks.

Another machine tool is known which has three tool carriers of which one is a tool turret which carries at least one drivable workpiece clamping means. As the workpiece clamping means, after the partially machined workpiece has been removed from the machine tool spindle, pivots the workpiece about its indexing axis, with progressive indexing movement of the tool turret, the workpiece arrives at the side which is remote from the spindle, where it can be machined from one of the other tool carriers.

Although that arrangement overcomes the above-indicated disadvantages, it does not however permit high- precision machining as the drivable workpiece clamping means can only be poorly mounted in the turret. In addition, it can only be driven at low power as the space fo the drive train in the turret is restricted due to the other tools.

German Utility Model No 66 00 091 also discloses a pivotable headstock for a lathe, which contains two drivable spindles. In that arrangement, one spindle is loaded while a workpiece can be machined at the other spindle.

According to the invention there is provided a machine tool comprising a drivable first spindle for carrying workpieces being machined, a second spindle coaxial with and in opposed relationship to the first spindle for carrying workpieces which have been partially machined in the first spindle, at least one of the first spindle and the second spindle being mounted in a spindle housing which is movable in the direction of the axis of the spindles, and two tool carriers, wherein the second spindle is indexable about an axis which is normal to said spindle axis, and one of the tool carriers is arranged on the side of the indexable second spindle which is remote from the first spindle.

Simultaneous machining operations of both spindles need not detrimentally affect each other.

The indexable spindle can be provided with a workpiece clamping means at both of its ends, and if it is then there is no need for an additional indexing movement to bring the clamping means into a position in opposed relationship to the first spindle.

A further spindle can be mounted in a housing in which the indexable second spindle is mounted and be coaxial with the second spindle. Preferably in that situation the spindle which is disposed in opposite relationship to the first spindle is driven with a synchronous speed of rotation and in the same direction, while the other pivotable spindle can be driven at any desired speed of rotation and in any desired direction.

If the slide which is movable in the axial direction of the spindles is additionally displaceable in a direction normal thereto, facing or planing machining operations can also be carried out on the workpiece by means of a stationarily disposed tool carrier.

In the event of considerable differences in the machining times on the first and second spindles, it may be desirable to effect machining of the workpiece on one of the two spindles, with both tool carriers. For that purpose, the pivotable spindle must be movable out of the oppositely disposed aligned position into a position in which it is parallel to the first spindle, and in the longitudinal direction into a position behind the clamping means of the first spindle.

The invention is diagrammatically illustrated by way of example in the accompanying drawings in which: Figure 1 shows a plan view of a machine tool according to the invention; and Figure 2 shows a partly sectional view of a pivotable spindle which can be used with the machine tool of Figure 1.

Referring to the drawings, stationarily disposed on a machine bed 1 is a headstock 2. A spindle 3 with an axis 10 and mounting a clamping chuck 4 is rotatably mounted in the headstock 2. Respective pairs of guide tracks 5 and 6 are disposed in front of and behind the heatstock 2, parallel to one another and to the axis of the spindle 3. Arranged on the front guide track 5 is a longitudinal slide 7 which carries a cross slide 8 with a tool turret 9.

The head of the tool turret 9 has an indexing axis which is parallel to the axis 10 of the spindle 3.

Disposed on the rear guide tracks 6 next to the headstock 2 is a longitudinal slide 11 with a cross slide 12 on which a spindle housing 13 of a pivotable spindle 14 is mounted. An indexing drive for the spindle housing 13 and a drive for the spindle 14 are disposed on the slide 12.

The guide tracks 6 on which the compound slide 11, 12 for the pivotable spindle 14 is displaceably mounted also carry a further longitudinal slide 15 with a cross slide 16 which carries a second turret head 17.

Figure 2 shows a drive train for a pivotable spindle 18 which carries clamping chucks 19, 20 at opposite sides. A drive motor 22 is mounted on an indexing drive housing 21 which accommodates an indexing drive of known kind and which is therefore not illustrated in detail. The drive motor 22 transmits its drive by way of a belt drive 23 to a shaft 24 which passes through an indexing spindle 25. Connected to the shaft 24 is a bevel gear 26 which meshes with a bevel gear fixed on the pivotable spindle 18. The pivotable spindle 18 is rotatably mounted in the spindle housing 13.

Secured to the spindle housing 13 is a ring gear 28 having a face tooth configuration, while a tooth configuration 29 co-operating therewith is connected to the indexing drive housing 21. In an indexing operation, the spindle housing 13 is first lifted out of the tooth configuration by the indexing spindle 25 before being rotated through a predetermined angle.

Besides the 180 indexing angle which is required for machining by means of the turret 17 of the workpiece which has been removed from the clamping chuck 4, the spindle 14 can also be rotated through other indexing angles. Preferably, at an indexing angle of 90 it is possible for example to perform an additional machining operation with a rotary tool from a machining unit which is not shown in the drawing. Upon further indexing through 90% machining is then effected by the tools of the turret head 17. After an indexing angle of 270% the workpiece is discharged downwardly to a workpiece conveyor means.

The invention is also not restricted to the illustrated embodiment, in regard to the paths of movement of the slides. Thus for example the pivotable spindle 14 may be immovable while the headstock 2 is capable of performing a movement in the axial direction of the spindle. The turret head 9 must then be able to carry out a cross movement while the turret head 17 must be arranged on a compound slide. If on the other hand the spindle 14 is connected, as shown, to the compound slide 11, 12, the turret head 17 may be stationarily fixed on the machine bed 1.

Claims (7)

1. A machine tool comprising a drivable first spindle for carrying workpieces being machined, a second spindle coaxial with and in opposed relationship to the first spindle for carrying workpieces which have been partially machined in the first spindle, at least one of the first spindle and the second spindle being mounted in a spindle housing which is movable in the direction of the axis of the spindles, and two tool carriers, wherein the second spindle is indexable about an axis which is normal to said spindle axis, and one of the tool carriers is arranged on the side of the indexable second spindle which is remote from the first spindle.
2. A machine tool according to claim 1, in which the indexable second spindle has a respective workpiece clamping means at each of its ends.
3. A machine tool according to claim 1, in which a further spindle is mounted in a housing in which the indexable second spindle is mounted and is coaxial with the second spindle.
4. A machine tool according to any one of claims 1 to 3, in which the indexable second spindle is mounted on a slide and said slide is movable in a direction normal to said axis of the spindles.
5. A machine tool according to any one of claims 1 to 4, in which said one of the tool carriers associated with the indexable spindle is arranged stationarily.
6. A machine tool according to claim 1, in which said one of the tool carriers associated with the indexable spindle is arranged on a compound slide and the indexable second spindle is movable in the direction of said axes of the spindles behind the first spindle.
7. A machine tool substantially as hereinbefore described and illustrated with reference to the accompanying drawings.
GB8513396A 1984-06-02 1985-05-28 Machine tool with two workpiece spindles Expired GB2159450B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19843420719 DE3420719C2 (en) 1984-06-02 1984-06-02

Publications (3)

Publication Number Publication Date
GB8513396D0 GB8513396D0 (en) 1985-07-03
GB2159450A true true GB2159450A (en) 1985-12-04
GB2159450B GB2159450B (en) 1987-06-03

Family

ID=6237556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8513396A Expired GB2159450B (en) 1984-06-02 1985-05-28 Machine tool with two workpiece spindles

Country Status (3)

Country Link
DE (1) DE3420719C2 (en)
FR (1) FR2565139B1 (en)
GB (1) GB2159450B (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2178991A (en) * 1985-08-13 1987-02-25 Ti Machine Tools Ltd Machine tool having two spindles
EP0267288A1 (en) * 1986-04-08 1988-05-18 Fanuc Ltd. Numerical control apparatus
FR2626798A1 (en) * 1988-02-04 1989-08-11 Gildemeister Ag A machine tool numerical control two workpiece spindle assemblies
US4949444A (en) * 1987-04-17 1990-08-21 Yamazaki Mazak Corporation Machine tool machining method
US5088361A (en) * 1988-02-09 1992-02-18 Yamazaki Mazak Kabushiki Kaisha Machining control apparatus in a machine tool
US5095598A (en) * 1987-04-17 1992-03-17 Yamazaki Mazak Corporation Complex machining machine tool
US5097575A (en) * 1987-04-17 1992-03-24 Yamazaki Mazak Corporation Complex machining machine tool
US5157824A (en) * 1987-04-17 1992-10-27 Yamazaki Mazak Corporation Opposed spindles lathe having tool rests movable in two different directions
US5168609A (en) * 1987-12-24 1992-12-08 Yamazaki Mazik Corp. Workpiece support for a turret on a opposed spindle lathe
US5175914A (en) * 1987-04-28 1993-01-05 Yamazaki Mazak Corporation Machine tool having dual spindles and tool rests
US5191817A (en) * 1987-04-17 1993-03-09 Yamazaki Mazak Corporation Machining method for the use of a complex machining machine tool
GB2313800A (en) * 1996-06-04 1997-12-10 Dainichi Kinzoku Kogyo Kabushi Simultaneous turning
EP1180407A1 (en) * 2000-08-17 2002-02-20 INDEX-WERKE GMBH &amp; CO. KG HAHN &amp; TESSKY Machine tool

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3626324A1 (en) * 1986-08-02 1988-02-04 Pittler Ag Maschf Double-spindle turning machine
DE3826938C2 (en) * 1987-08-17 1992-04-30 Gebrueder Brinkmann Gmbh, Maschinen- Und Zahnraederfabrik, 4930 Detmold, De
DE8713204U1 (en) * 1987-10-01 1987-11-12 Gildemeister Ag, 4800 Bielefeld, De
DE3734687C2 (en) * 1987-10-14 1994-11-17 Index Werke Kg Hahn & Tessky A method for loading and unloading the main spindle of a lathe and lathe for carrying out this method
DE68924580D1 (en) * 1988-04-19 1995-11-23 Nakamura Tome Precision Ind CNC lathe with two opposing main spindles.
EP0410044B1 (en) * 1989-07-26 1992-03-25 GILDEMEISTER ITALIANA S.p.A. Lathe with three spindles for workpieces
DE4008679C1 (en) * 1990-03-17 1991-06-27 A. Monforts Gmbh & Co, 4050 Moenchengladbach, De Lathe with two-sided machining - incorporates main spindle and sub-spindle carried on longitudinally moving frame
DE9015022U1 (en) * 1990-10-31 1991-01-31 Ima-Norte Maschinenfabriken Klessmann Gmbh & Co, 4830 Guetersloh, De
DE102008020489B4 (en) 2008-04-23 2016-11-17 Nc-Automation Gmbh A method for gripping objects by means of gripping tools without the energy and signal supply

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE377151C (en) * 1920-11-14 1923-06-09 Edmund Rumpler Dr Ing Lathe with a common set of two opposite adjustable Werkzeugtraegern Werkstueckspindeln
DE1264927B (en) * 1965-01-15 1968-03-28 Gildemeister Werkzeugmasch Device for tapping and rueckseitigen Editing workpieces on multi-spindle automatic lathes
DE6600091U (en) * 1965-05-13 1969-01-02 Gildemeister Werkzeugmasch lathe
DE1903136A1 (en) * 1969-01-22 1970-08-13 Ravensburg Maschf Headstock for machine tools
DE3035451C3 (en) * 1980-07-16 1994-11-17 Gildemeister Spa Lathe having two axially opposite workpiece spindles
EP0064766A3 (en) * 1981-05-13 1983-07-20 DSO "SAVODI sa METALOREJESCHTI MASCHINI" Method and device for working pieces with rotational symmetry
DE8313200U1 (en) * 1983-05-04 1983-09-15 Index-Werke Kg Hahn & Tessky, 7300 Esslingen, De Revolver turning automat

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2178991A (en) * 1985-08-13 1987-02-25 Ti Machine Tools Ltd Machine tool having two spindles
EP0267288A1 (en) * 1986-04-08 1988-05-18 Fanuc Ltd. Numerical control apparatus
EP0267288A4 (en) * 1986-04-08 1990-07-03 Fanuc Ltd Numerical control apparatus.
US5115546A (en) * 1987-04-17 1992-05-26 Yamazaki Mazak Corporation Complex machining machine tool
US5191817A (en) * 1987-04-17 1993-03-09 Yamazaki Mazak Corporation Machining method for the use of a complex machining machine tool
US4949444A (en) * 1987-04-17 1990-08-21 Yamazaki Mazak Corporation Machine tool machining method
US5095598A (en) * 1987-04-17 1992-03-17 Yamazaki Mazak Corporation Complex machining machine tool
US5097575A (en) * 1987-04-17 1992-03-24 Yamazaki Mazak Corporation Complex machining machine tool
US5157824A (en) * 1987-04-17 1992-10-27 Yamazaki Mazak Corporation Opposed spindles lathe having tool rests movable in two different directions
US5175914A (en) * 1987-04-28 1993-01-05 Yamazaki Mazak Corporation Machine tool having dual spindles and tool rests
US5168609A (en) * 1987-12-24 1992-12-08 Yamazaki Mazik Corp. Workpiece support for a turret on a opposed spindle lathe
FR2626798A1 (en) * 1988-02-04 1989-08-11 Gildemeister Ag A machine tool numerical control two workpiece spindle assemblies
US5088361A (en) * 1988-02-09 1992-02-18 Yamazaki Mazak Kabushiki Kaisha Machining control apparatus in a machine tool
GB2313800A (en) * 1996-06-04 1997-12-10 Dainichi Kinzoku Kogyo Kabushi Simultaneous turning
US6024001A (en) * 1996-06-04 2000-02-15 Dainichi Kinzoku Kogyo Kabushiki Kaisha Method of turning works and lathe for carrying out the method
GB2313800B (en) * 1996-06-04 2000-08-16 Dainichi Kinzoku Kogyo Kabushi Method of turning works and lathe for carrying out the method
EP1180407A1 (en) * 2000-08-17 2002-02-20 INDEX-WERKE GMBH &amp; CO. KG HAHN &amp; TESSKY Machine tool
US6622600B2 (en) 2000-08-17 2003-09-23 Index-Werke Gmbh & Co. Kg Hahn & Tessky Machine tool

Also Published As

Publication number Publication date Type
GB8513396D0 (en) 1985-07-03 grant
FR2565139A1 (en) 1985-12-06 application
DE3420719C2 (en) 1989-07-27 grant
DE3420719A1 (en) 1985-12-05 application
FR2565139B1 (en) 1991-09-06 grant
GB2159450B (en) 1987-06-03 grant

Similar Documents

Publication Publication Date Title
US5486151A (en) Machining center for machining a workpiece by means of at least two interchangeable tools
US4608747A (en) Multispindle-automatic turret lathe
US5205806A (en) Composite-machining machine tool
US4529342A (en) Indexing attachment
US4404727A (en) Machine tool operable as both a chucking type lathe and as a machining center
US4400859A (en) Machining centers for machining tubular workpieces
US4571796A (en) Lathe
US5490307A (en) Lathe
US4006518A (en) Turret lathe
US4831906A (en) Numerical control machine
US4302144A (en) Work changing mechanism for machine tools
US5885199A (en) Compact machining center for multifunction
US5351376A (en) Machine tool
US4612832A (en) Multiple-function machine tool with two spindles
US4763549A (en) Machine tools, preferably lathes
US4785525A (en) Machine tool for complex machining
US5832590A (en) System for machining workpieces
US6796012B2 (en) Milling machine for carrying out milling and turning operations on rod material
US4635340A (en) Method of machining a workpiece in a turret lathe and an NC lathe for performing this method
US3477121A (en) Machining center with dual function tool operator
US5392501A (en) Automatic lathe
US5052089A (en) Multi-function machine tool which permits complex machining of long pieces
US4180894A (en) Automatic turret lathe
US6715386B2 (en) Turning method
US4612690A (en) Multiple spindle machine tool

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940528