WO2007016910A2 - Method and device for machining the surfaces of workpieces - Google Patents

Method and device for machining the surfaces of workpieces Download PDF

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Publication number
WO2007016910A2
WO2007016910A2 PCT/DE2006/001369 DE2006001369W WO2007016910A2 WO 2007016910 A2 WO2007016910 A2 WO 2007016910A2 DE 2006001369 W DE2006001369 W DE 2006001369W WO 2007016910 A2 WO2007016910 A2 WO 2007016910A2
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WO
WIPO (PCT)
Prior art keywords
workpiece
cutting edge
tool
circular
axis
Prior art date
Application number
PCT/DE2006/001369
Other languages
German (de)
French (fr)
Other versions
WO2007016910A3 (en
Inventor
Markus Hessbrüggen
Christoph Wernz
Ulrich Walter
Martin Ellwanger
Original Assignee
Emag Holding 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 Emag Holding Gmbh filed Critical Emag Holding Gmbh
Priority to DE112006002735T priority Critical patent/DE112006002735A5/en
Publication of WO2007016910A2 publication Critical patent/WO2007016910A2/en
Publication of WO2007016910A3 publication Critical patent/WO2007016910A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D37/00—Broaching machines or broaching devices
    • B23D37/005—Broaching machines or broaching devices for cylindrical workpieces, e.g. crankshafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
    • 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
    • B23B3/167—Turret lathes for turning individually-chucked workpieces lathe with two or more toolslides carrying turrets
    • 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
    • B23B5/36—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning specially-shaped surfaces by making use of relative movement of the tool and work produced by geometrical mechanisms, i.e. forming-lathes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2265/00—Details of general geometric configurations
    • B23B2265/16—Elliptical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
    • B23B2270/54—Methods of turning, boring or drilling not otherwise provided for

Definitions

  • the invention relates to a method and a device for machining workpieces with both non-circular and rotationally symmetrical inner and outer contours.
  • the turning of soft or hardened workpieces with certain cutting edge is state of the art.
  • a thread-like structure in the form of rotational depths or workpiece elevations inevitably arises on the workpiece surface as a result of the feed of the tool along the rotating workpiece.
  • DE 102004 026 675 B3 discloses a method for machining rotationally symmetrical surfaces of a workpiece.
  • the tool cutting edge is moved around the tool rotation axis in the form of a helix coaxial with the tool rotation axis with an arcuate feed motion so that the point of action travels between the cutting edge and the workpiece along the cutting edge.
  • the production and maintenance of helical cutting edges, which extend coaxially to the tool rotation axis is comparatively complicated and expensive.
  • this method is not suitable for machining non-circular workpiece contours.
  • the invention is based on the object, a method and an apparatus for processing both non-circular and rotationally symmetrical inner and
  • the core idea of the invention is to use a tool with a flat, oblique to the workpiece rotation axis cutting edge, which is moved with a circular arc-shaped feed movement about a pivot axis, to achieve swirl-free workpiece surfaces.
  • the contour deviations of the workpiece due to the planar cutting edge shape are compensated by a relative movement between the workpiece and the tool.
  • non-circular workpiece contours, such as cam shapes can be edited.
  • the axes of rotation of the tool turret and the workpiece are arranged in parallel.
  • the circular arc-shaped feed movement of the tool cutting edge can be carried out particularly advantageously by a pivoting movement of the tool turret.
  • Fig. 1 shows a machine tool with two tool turrets
  • Fig. 2 shows the tool turret seen from above
  • Fig. 3 shows inserts with different cutting shapes
  • Fig. 1 shows a machine tool 1, in which not essential to the invention details of the workpiece feed, the drive, the controller and the housing are not shown.
  • the machine tool 1 described is particularly suitable for machining wave-shaped workpieces 7. These are clamped in the workpiece holding device consisting of the motor spindle 8 and the tailstock 9 and set in rotation.
  • the two tool turrets 10 and 11 are guided on the machine frame 2 in two mutually orthogonal directions (X and Z axis) movable.
  • vertical guides 3 for the vertical slides 4 are provided on the machine frame 2.
  • the motors 6 with the ball screws 14 serve as a drive.
  • the vertical slides 4 carry guides 12 for the horizontal slides 5.
  • Fig. 2 shows the tool turrets 10, 11 in the view from above.
  • the tool 15 is brought with the cutting edge 17 with a circular arc-shaped feed movement with the workpiece in engagement.
  • the contour deviations of the workpiece caused by the cutting edge shape are compensated by a feed movement of the horizontal carriage 5 along the guides 12.
  • the flat cutting edge 17 is designed as a turning plate.
  • a support bearing 16 is provided instead of a tool.
  • Fig. 3a shows a turning plate with a straight edge.
  • FIG. 3b shows a turning plate with arcuate cutting edge.
  • Fig. 3c shows a turning plate with curved, eg elliptical cutting edge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Milling Processes (AREA)

Abstract

The invention relates to a method and a device for machining workpieces having both out-of-round and rotation-symmetrical inner and outer contours on a rotating workpiece. At least one tool having a straight cutting edge engages with the workpiece. Said cutting edge is tilted by an angle α in relation to the rotational axis of the workpiece. The cutting edge is displaced about a swiveling axis performing a circular advance movement. During advance, the active site between the workpiece and the tool travels along the cutting edge and a feed motion between the workpiece and the tool produces the out-of-round inner and outer contours of the workpiece and/or evens out the contour variations of the workpiece caused by the shape of the cutting edge.

Description

Verfahren und Vorrichtung zur Bearbeitung von Werkstückoberflächen Method and device for processing workpiece surfaces
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Bearbeitung von Werkstücken mit sowohl unrunden als auch rotationssymmetrischen Innen- und Außenkonturen. Die Drehbearbeitung weicher oder gehärteter Werkstücke mit bestimmter Schneide ist Stand der Technik. Beim Längsdrehen entsteht auf der Werkstückoberfläche durch den Vorschub des Werkzeuges entlang des rotierenden Werkstücks zwangsläufig eine gewindeartige Struktur in Form von Drehriefen oder Werkstückerhebungen. Zur Vermeidung solcher Drehriefen ist aus der DE 102004 026 675 B3 ist ein Verfahren zum spanenden Bearbeiten rotationssymmetrischer Flächen eines Werkstücks bekannt. Dabei wird die Werkzeugschneide in Form einer zur Werkzeugrotationsachse koaxialen Schraubenlinie mit einer kreisbogenförmigen Vorschubbewegung um die Werkzeugrotationsachse bewegt, so dass die Wirkstelle zwischen Schneide und Werkstück entlang der Schneide wandert. Die Herstellung und Wartung von schraubenartigen Schneiden, die koaxial zur Werkzeugrotationsachse verlaufen ist vergleichsweise aufwendig und teuer.The invention relates to a method and a device for machining workpieces with both non-circular and rotationally symmetrical inner and outer contours. The turning of soft or hardened workpieces with certain cutting edge is state of the art. During longitudinal turning, a thread-like structure in the form of rotational depths or workpiece elevations inevitably arises on the workpiece surface as a result of the feed of the tool along the rotating workpiece. To avoid such rotational depths, DE 102004 026 675 B3 discloses a method for machining rotationally symmetrical surfaces of a workpiece. In this case, the tool cutting edge is moved around the tool rotation axis in the form of a helix coaxial with the tool rotation axis with an arcuate feed motion so that the point of action travels between the cutting edge and the workpiece along the cutting edge. The production and maintenance of helical cutting edges, which extend coaxially to the tool rotation axis is comparatively complicated and expensive.
Außerdem ist dieses Verfahren ist zur Bearbeitung unrunder Werkstückkonturen nicht geeignet.In addition, this method is not suitable for machining non-circular workpiece contours.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Bearbeitung sowohl unrunder als auch rotationssymmetrischer Innen- undThe invention is based on the object, a method and an apparatus for processing both non-circular and rotationally symmetrical inner and
Außenkonturen von Werkstückoberflächen zu schaffen. Es ist auch Aufgabe der Erfindung die Werkzeugkosten unter Beibehaltung drallfreier Werkstückoberflächen zu senken.To create outer contours of workpiece surfaces. It is also an object of the invention to reduce the tool costs while maintaining spin-free workpiece surfaces.
Zur Lösung dieser Aufgabe wird ein Verfahren nach Anspruch 1 und eine Vorrichtung nach Anspruch 5 vorgeschlagen. Vorteilhafte Ausführungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen. Der Kerngedanke der Erfindung besteht darin, ein Werkzeug mit einer ebenen, schräg zur Werkstückrotationsachse verlaufenden Schneide, die mit einer kreisbogenförmigen Vorschubbewegung um eine Schwenkachse bewegt wird, zur Erzielung drallfreier Werkstückoberflächen einzusetzen. Dabei werden die durch die ebene Schneidenform bedingten Konturabweichungen des Werkstücks durch eine Relativbewegung zwischen Werkstück und Werkzeug ausgeglichen. Auf diese Weise können auch unrunde Werkstückkonturen, wie zum Beispiel Nockenformen, bearbeitet werden. Nach diesem Verfahren lassen sich besonders hochwertige Werkstückoberflächen mit geringer Rautiefe herstellen. Da die Werkzeugschneide eben ist, können kostengünstige Wendeplatten mit gerader, gebogener oder kreisbogenförmiger Schneidkante eingesetzt werden, welche auch für die Hartbearbeitung in der erforderlichen Qualität im Handel verfügbar sind.To solve this problem, a method according to claim 1 and an apparatus according to claim 5 is proposed. Advantageous embodiments and modifications of the invention will become apparent from the dependent claims. The core idea of the invention is to use a tool with a flat, oblique to the workpiece rotation axis cutting edge, which is moved with a circular arc-shaped feed movement about a pivot axis, to achieve swirl-free workpiece surfaces. In the process, the contour deviations of the workpiece due to the planar cutting edge shape are compensated by a relative movement between the workpiece and the tool. In this way, non-circular workpiece contours, such as cam shapes, can be edited. Using this method, it is possible to produce particularly high-quality workpiece surfaces with a low roughness. Since the tool cutting edge is flat, cost-effective inserts with straight, curved or circular cutting edge can be used, which are also available for hard machining in the required quality commercially.
Bei der erfindungsgemäßen Vorrichtung sind die Rotationsachsen des Werkzeugrevolvers und des Werkstücks parallel angeordnet. Dadurch kann die kreisbogenförmige Vorschubbewegung der Werkzeugschneide besonders vorteilhaft durch eine Schwenkbewegung des Werkzeugrevolvers ausgeführt werden.In the device according to the invention, the axes of rotation of the tool turret and the workpiece are arranged in parallel. As a result, the circular arc-shaped feed movement of the tool cutting edge can be carried out particularly advantageously by a pivoting movement of the tool turret.
Fig. 1 zeigt eine Werkzeugmaschine mit zwei Werkzeugrevolvern Fig. 2 zeigt die Werkzeugrevolver von oben gesehenFig. 1 shows a machine tool with two tool turrets Fig. 2 shows the tool turret seen from above
Fig. 3 zeigt Wendeplatten mit verschiedenen SchneidenformenFig. 3 shows inserts with different cutting shapes
Fig. 1 zeigt eine Werkzeugmaschine 1 , bei welcher nicht erfindungswesentliche Details der Werkstückzuführung, des Antriebs, der Steuerung und des Gehäuses nicht dargestellt sind. Die beschriebene Werkzeugmaschine 1 eignet sich insbesondere zur Bearbeitung wellenförmiger Werkstücke 7. Diese werden in der Werkstückhaltevorrichtung, bestehend aus der Motorspindel 8 und dem Reitstock 9 eingespannt und in Rotation versetzt. Die beiden Werkzeugrevolver 10 und 11 sind am Maschinengestell 2 in zwei zueinander orthogonalen Richtungen (X- und Z- Achse) beweglich geführt. Dazu sind am Maschinengestell 2 vertikale Führungen 3 für die Vertikalschlitten 4 vorgesehen. Als Antrieb dienen die Motoren 6 mit den Kugelrollspindeln 14. Die Vertikalschlitten 4 tragen ihrerseits Führungen 12 für die Horizontalschlitten 5. In den Horizontalschlitten 5 sind die Werkzeugrevolver 10, 11 um eine Schwenkachse 13 drehbar gelagert. Fig. 2 zeigt die Werkzeugrevolver 10, 11 in der Sicht von oben. Durch eine Schwenkbewegung des Werkzeugrevolvers 11 um die Schwenkachse 13 wird das Werkzeug 15 mit der Schneide 17 mit einer kreisbogenförmigen Vorschubbewegung mit dem Werkstück in Eingriff gebracht. Dabei werden die durch die Schneidenform bedingten Konturabweichungen des Werkstücks durch eine Zustellbewegung des Horizontalschlittens 5 entlang der Führungen 12 ausgeglichen. In einer vorteilhaften Ausführung ist die ebene Schneide 17 als Wendeplatte ausgeführt. Besonders vorteilhaft ist am Werkzeugrevolver 10 ein Stützlager 16 an Stelle eines Werkzeugs vorgesehen. Fig. 3a zeigt eine Wendeplatte mit gerader Schneide. Fig. 3b zeigt eine Wendeplatte mit kreisbogenförmiger Schneide. Fig. 3c zeigt eine Wendeplatte mit gebogener, z.B. ellipsenförmiger Schneide. Diese Schneidenformen erfordern unterschiedliche Zustellbewegungen und sind je Werkstückbeschaffenheit vorteilhaft bei dem erfindungsgemäßen Verfahren einsetzbar. Fig. 1 shows a machine tool 1, in which not essential to the invention details of the workpiece feed, the drive, the controller and the housing are not shown. The machine tool 1 described is particularly suitable for machining wave-shaped workpieces 7. These are clamped in the workpiece holding device consisting of the motor spindle 8 and the tailstock 9 and set in rotation. The two tool turrets 10 and 11 are guided on the machine frame 2 in two mutually orthogonal directions (X and Z axis) movable. For this purpose, vertical guides 3 for the vertical slides 4 are provided on the machine frame 2. The motors 6 with the ball screws 14 serve as a drive. The vertical slides 4, in turn, carry guides 12 for the horizontal slides 5. In the horizontal slides 5, the tool turrets 10, 11 are mounted rotatably about a pivot axis 13. Fig. 2 shows the tool turrets 10, 11 in the view from above. By a pivoting movement of the tool turret 11 about the pivot axis 13, the tool 15 is brought with the cutting edge 17 with a circular arc-shaped feed movement with the workpiece in engagement. In the process, the contour deviations of the workpiece caused by the cutting edge shape are compensated by a feed movement of the horizontal carriage 5 along the guides 12. In an advantageous embodiment, the flat cutting edge 17 is designed as a turning plate. Particularly advantageous is the tool turret 10, a support bearing 16 is provided instead of a tool. Fig. 3a shows a turning plate with a straight edge. Fig. 3b shows a turning plate with arcuate cutting edge. Fig. 3c shows a turning plate with curved, eg elliptical cutting edge. These cutter shapes require different feed movements and can be used advantageously for each workpiece geometry in the method according to the invention.
Bezugszeichenreference numeral
1 Werkzeugmaschine1 machine tool
2 Maschinengestell 3 Führung2 machine frame 3 guide
4 Vertikalschlitten4 vertical slides
5 Horizontalschlitten5 horizontal slides
6 Motor6 engine
7 Werkstück 8 Motorspindel7 workpiece 8 motor spindle
9 Reitstock9 tailstock
10 Werkzeugrevolver10 tool turrets
11 Werkzeugrevolver11 Tool turret
12 Führung 13 Schwenkachse12 guide 13 pivot axis
14 Kugelrollspindel14 ball screw
15 Werkzeug15 tool
16 Stützlager16 support bearings
17 Schneide17 cutting edge
-A- -A-

Claims

Patentansprüche claims
1. Verfahren zur Bearbeitung sowohl unrunder als auch rotationssymmetrischer Innen- und Außenkonturen an einem rotierenden Werkstück (7) wobei - wenigstens ein Werkzeug (15) mit einer ebenen Schneide (17) mit dem1. A method for processing both non-circular and rotationally symmetrical inner and outer contours on a rotating workpiece (7) wherein - at least one tool (15) with a flat cutting edge (17) with the
Werkstück (7) in Eingriff kommtWorkpiece (7) comes into engagement
- die Schneide (17) gegenüber der Rotationsachse des Werkstücks (7) um einen Winkel α geneigt ist- The cutting edge (17) relative to the axis of rotation of the workpiece (7) is inclined by an angle α
- die Schneide (17) mit einer kreisbogenförmigen Vorschubbewegung um eine Schwenkachse (13) bewegt wird- The cutting edge (17) is moved with a circular arc-shaped feed movement about a pivot axis (13)
- während des Vorschubs die Wirkstelle zwischen Werkstück (7) und Werkzeug (15) entlang der Schneide (17) wandert- Moving the active site between the workpiece (7) and tool (15) along the cutting edge (17) during the feed
dadurch gekennzeichnet,characterized,
dass durch eine Zustellbewegung zwischen Werkstück (7) und Werkzeug (15) die unrunden Innen- und Außenkonturen des Werkstücks (7) erzeugt und/oder die durch die Schneidenform bedingten Konturabweichungen des Werkstücks (7) ausgeglichen werden.in that the out-of-round inner and outer contours of the workpiece (7) are generated by a feed movement between the workpiece (7) and the tool (15) and / or the contour deviations of the workpiece (7) caused by the cutter shape are compensated.
2. Verfahren nach Anspruch 1 dadurch gekennzeichnet, dass in Abhängigkeit von der Größe der zu bearbeitenden Werkstückfläche die Werkzeugschneide (17) relativ zum Werkstück (7) so oft in Richtung der Rotationsachse des Werkstücks (7) versetzt wird, bis die Werkstückfläche vollständig bearbeitet ist.2. The method according to claim 1, characterized in that depending on the size of the workpiece surface to be machined, the tool cutting edge (17) relative to the workpiece (7) as often in the direction of the axis of rotation of the workpiece (7) is offset until the workpiece surface is completely processed ,
3. Verfahren nach Anspruch 1 oder 2 dadurch gekennzeichnet, dass das Werkstück (7) während der Bearbeitung an beiden Enden eingespannt ist.3. The method according to claim 1 or 2, characterized in that the workpiece (7) is clamped during machining at both ends.
4. Verfahren nach Anspruch 3 dadurch gekennzeichnet, dass das Werkstück während der Bearbeitung zwischen beiden Enden auf der dem Werkzeug (15) gegenüberliegenden Seite mit einem Stützlager (16) abgestützt wird. 4. The method according to claim 3, characterized in that the workpiece during machining between the two ends on the tool (15) opposite side with a support bearing (16) is supported.
5. Werkzeugmaschine zur Bearbeitung sowohl unrunder als auch rotationssymmetrischer Innen- und Außenkonturen an einem rotierenden Werkstück (7), mit wenigstens einem Werkzeug (15) mit einer ebenen Schneide (17), wobei die Schneide (17) mit einer kreisbogenförmigen Vorschubbewegung um eine Schwenkachse (13) bewegbar ist, wobei zur5. Machine tool for machining both non-circular and rotationally symmetrical inner and outer contours on a rotating workpiece (7), with at least one tool (15) with a flat cutting edge (17), wherein the cutting edge (17) with a circular arc-shaped feed movement about a pivot axis (13) is movable, wherein the
Aufnahme des Werkzeugs (7) ein Werkzeugrevolver (11 ) vorgesehen istRecording the tool (7) a tool turret (11) is provided
dadurch gekennzeichnet,characterized,
dass zum Ausführen einer kreisbogenförmigen Vorschubbewegung derthat for carrying out a circular-arc feed movement of the
Werkzeugrevolver (11 ) um eine Rotationsachse (13) schwenkbar ist.Tool turret (11) about an axis of rotation (13) is pivotable.
6. Werkzeugmaschine nach Anspruch 5, dadurch gekennzeichnet, dass die ebene Schneide (17) eine gebogene oder kreisbogenförmige Schneidkante aufweist.6. Machine tool according to claim 5, characterized in that the flat cutting edge (17) has a curved or circular cutting edge.
7. Werkzeugmaschine nach Anspruch 5, dadurch gekennzeichnet, dass die ebene Schneide (17) eine gerade Schneidkante aufweist.7. Machine tool according to claim 5, characterized in that the flat cutting edge (17) has a straight cutting edge.
8. Werkzeugmaschine nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass auf der dem Werkzeug (15) gegenüberliegenden Seite ein Stützlager (16) vorgesehen ist.8. Machine tool according to one of claims 5 to 7, characterized in that on the tool (15) opposite side, a support bearing (16) is provided.
9. Werkzeugmaschine nach Anspruch 8, dadurch gekennzeichnet, dass das Stützlager (16) an einem zweiten Werkzeugrevolver (10) angeordnet ist. 9. Machine tool according to claim 8, characterized in that the support bearing (16) on a second tool turret (10) is arranged.
PCT/DE2006/001369 2005-08-05 2006-08-04 Method and device for machining the surfaces of workpieces WO2007016910A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112006002735T DE112006002735A5 (en) 2005-08-05 2006-08-04 Method and device for processing workpiece surfaces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510037665 DE102005037665B3 (en) 2005-08-05 2005-08-05 Method for processing non-round and also rotationally symmetrical inner and outer contours of a rotating workpiece comprises producing an adjusting movement between a workpiece and a tool and comparing contour deviations
DE102005037665.7 2005-08-05

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WO2007016910A2 true WO2007016910A2 (en) 2007-02-15
WO2007016910A3 WO2007016910A3 (en) 2007-04-19

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DE102007033820C5 (en) 2007-07-18 2017-12-14 Emag Holding Gmbh Method for machining rotating workpieces
DE102010012149B4 (en) 2010-03-20 2014-06-18 Emag Holding Gmbh Method and device for machining rotationally driven workpieces
KR20170129163A (en) 2015-02-24 2017-11-24 반두리트 게엠베하 하르트메탈 운트 디아만트베르크초이그 Device, method and cutting plate for machining a rotary work piece
DE102016109036A1 (en) 2016-05-17 2017-11-23 Vandurit GmbH Hartmetall und Diamantwerkzeuge Tool swivel unit for a lathe

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JP2013107194A (en) * 2011-11-17 2013-06-06 Emag Holding Gmbh Machine tool and method for completely working shaft-shaped workpiece
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CN103862317A (en) * 2012-12-07 2014-06-18 Emag控股有限公司 Machining apparatus
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