EP0715931A1 - Marking device for lathe workpieces - Google Patents

Marking device for lathe workpieces Download PDF

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Publication number
EP0715931A1
EP0715931A1 EP95119201A EP95119201A EP0715931A1 EP 0715931 A1 EP0715931 A1 EP 0715931A1 EP 95119201 A EP95119201 A EP 95119201A EP 95119201 A EP95119201 A EP 95119201A EP 0715931 A1 EP0715931 A1 EP 0715931A1
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EP
European Patent Office
Prior art keywords
web
wall parts
workpiece
iron
striking device
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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
EP95119201A
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German (de)
French (fr)
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EP0715931B1 (en
Inventor
Gerhard Meibers
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C7/00—Wood-turning machines; Equipment therefor
    • B27C7/04—Devices for centering or chucking work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D5/00—Centre punches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H7/00—Marking-out or setting-out work
    • B25H7/04—Devices, e.g. scribers, for marking

Definitions

  • the marking of the center of a workpiece end face has so far been realized by drawing two lines, each leading from one corner of the workpiece end face to the diagonally opposite corner. The workpiece was then grained at the intersection of these two lines. The workpiece is then to be clamped at the grained points. The central marking of logs was carried out using a centering angle.
  • the invention is based on the object of developing a device with which lathe workpieces can be grained centrally on the end faces in a simple manner.
  • the object is achieved according to the invention in that four identical wall parts are movably connected to one another by means of four hinge devices such that they form an isosceles parallelogram when viewed from the front, and a web is movably mounted on the center of two opposite wall parts, one in the center of which Has device for guiding an iron (grains).
  • the invention makes it possible to centrally grain the workpiece in a single operation. A previous marking is not necessary.
  • the grain is held permanently resilient in the guide of the web and thus enables marking with one hand, the other hand being able to hold the parallelogram. It is particularly advantageous to construct the wall parts from individual elements, so that the wall height can be increased by inserting more elements for damaged or asymmetrically chamfered workpiece ends. If you also carry out the web for guiding the grain in the form of such an element, the overall component is produced very cost-effectively, since only one (uniform) molded part is required.
  • FIG. 1 shows the design of a marking device for turning parts with a workpiece 7.
  • the hinge-like wall parts 1, 2, 3, 4 encompass the workpiece 7 on the end face.
  • the workpiece 7 touches the web 5 designed as a central parallel and is marked centrally by an impact (arrow) on the striking device 6, by pressing the tip of the grain iron 9 into the workpiece.
  • FIG. 2 shows a marking device in the front view, with a view of the wall part 2.
  • the web 5 is movably mounted on two opposite wall parts 1, 3.
  • the striking device 6 in unity with the grain iron 9 is held in the geometric center of the parallelogram formed by the wall parts.
  • the return spring 8 returns the impact device 6 and the grain iron 9 back to its original position after the grain.
  • FIG. 3 shows a marking device in a side view, with a view of the wall 1.
  • the movable connection of the wall parts to one another is realized by toothing the wall parts and one bolt 10 each.
  • FIG. 4 shows the assembly of two wall parts 1, 2. It is clear that all wall parts are identical and interlock like a toothing.
  • FIG. 5 shows the marking device with a view perpendicular to the striking device 6, the device being shifted to the parallelogram.
  • FIG. 6 schematically shows the position of a workpiece end face 71 to be centrally grained with a rectangular shape. It is important that two diagonally opposite corners of the workpiece rest on two correspondingly opposite corners of the parallelogram, which is sheared from its square basic shape until this geometric condition is met.
  • FIG. 7 schematically shows the position of a workpiece end face 72 to be centrally grained with a round shape. Centering is given here if each side of the parallelogram is in contact with the workpiece.
  • Figures 8 to 14 show a particularly advantageous embodiment of the device, in which the wall parts 1 ', 2', 3 ', 4' are each made up of several individual elements 11, 12, 13, 14, which are all identical in construction, as is the case Bridge 5 '. These elements have recesses at their ends which, viewed from the longitudinal edge, extend over half the height and thus enable the elements to be interlocked.
  • elements of adjacent sides for example 1 ′, 2 ′
  • FIG. 11 and 11 The centering of a workpiece with a rectangular 71 'or round cross section 72' is shown in FIGS. 13 and 14 for this embodiment and proceeds in the same way as the procedure illustrated in FIGS. 6 and 7 for the first embodiment.
  • the elements are preferably made of plastic, but can also be made of metal or wood.
  • workpieces to be centered can also consist of different materials.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Forging (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Turning (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

Four identical wall parts (1,2,3,4) are connected together movable by four hinge devices so that, viewed from the end, they form an even sided parallelogram. A web (5) is mounted movable on two opposite wall parts in the middle on the end side and has in its centre a device for guiding a tooling iron. The tooling iron has a striking device (6). The iron and striking device are held centrally by the web and a coil spring between web and striking device resets the iron/striking device unit.

Description

Zur Bearbeitung insbesondere von Hölzern in einer Drechselmaschine ist es erforderlich, daß die Stirnseiten des Werkstückes vor dem Einspannen des Werkstückes in die Maschine zentrisch markiert werden. An diesen zentrischen Markierungen wird dann der Dorn der Einspannvorrichtung aufgesetzt. Durch dieses zentrische Einspannen des Werkstückes wird eine große Unwucht beim eigentlichen Drechselvorgang vermieden und eine optimale Ausnutzung des Materials, z. B. Holz, gewährleistet.To process wood in particular in a woodturning machine, it is necessary that the end faces of the workpiece are marked centrally before the workpiece is clamped in the machine. The mandrel of the clamping device is then placed on these central markings. This central clamping of the workpiece avoids a large imbalance during the actual turning process and optimal use of the material, e.g. B. wood, guaranteed.

Das Markieren des Zentrums einer Werkstückstirnfläche wurde bislang realisiert durch das Anzeichnen zweier Linien, die von jeweils einer Ecke der Werkstückstirnfläche zur diagonal gegenüberliegenden Ecke führen. Am Schnittpunkt dieser beiden Linien wurde dann das Werkstück gekörnt. An den gekörnten Punkten ist das Werkstück dann einzuspannen. Die zentrische Markierung von Rundhölzern erfolgte mit Hilfe eines Zentrierwinkels.The marking of the center of a workpiece end face has so far been realized by drawing two lines, each leading from one corner of the workpiece end face to the diagonally opposite corner. The workpiece was then grained at the intersection of these two lines. The workpiece is then to be clamped at the grained points. The central marking of logs was carried out using a centering angle.

Diese Vorgehensweise zum Markieren ist zeitaufwendig, da zunächst angezeichnet und daraufhin gekörnt werden muß. Das Anzeichnen des Zentrums ist oft ungenau. Beim Ansetzen des Körners kann eine weitere Ungenauigkeit entstehen. Es ist in einer Werkstatt unpraktisch, für diesen Arbeitsgang Lineal, einen spitzen Stift und den Körner bereitzuhalten.This marking procedure is time-consuming, since it must first be marked and then grained. Marking the center is often inaccurate. Another inaccuracy can occur when placing the center. It is impractical in a workshop to have a ruler, a pointed pen and the grain ready for this operation.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zu entwickeln, mit der auf einfache Weise Drechselwerkstücke an den Stirnseiten zentral gekörnt werden können.The invention is based on the object of developing a device with which lathe workpieces can be grained centrally on the end faces in a simple manner.

Die Lösung der Aufgabe gelingt erfindungsgemäß dadurch, daß vier gleiche Wandteile mittels vier Scharniervorrichtungen beweglich so miteinander verbunden sind, daß sie - stirnseitig betrachtet - ein gleichschenkliges Parallelogramm bilden, und an zwei gegenüberliegenden Wandteilen stirnseitig mittig ein Steg beweglich montiert ist, der in seinem Zentrum eine Vorrichtung zum Führen eines Eisens (Körner) aufweist.The object is achieved according to the invention in that four identical wall parts are movably connected to one another by means of four hinge devices such that they form an isosceles parallelogram when viewed from the front, and a web is movably mounted on the center of two opposite wall parts, one in the center of which Has device for guiding an iron (grains).

Durch die Erfindung wird es möglich, in einem einzigen Arbeitsgang das Werkstück zentral zu körnen. Ein vorheriges Anzeichnen entfällt. In vorteilhafter Ausführung wird dabei der Körner in der Führung des Steges dauerhaft federnd gehalten und ermöglicht so die Markierung mit einer Hand, wobei die andere Hand das Parallelogramm halten kann. Besonders vorteilhaft ist es, die Wandteile aus einzelnen Elementen aufzubauen, so daß für beschädigte oder unsymmetrisch angefaste Werkstückenden die Wandhöhe durch Einsetzen von mehr Elementen vergrößert werden kann. Führt man zusätzlich den Steg zur Führung des Körners in Gestalt eines solchen Elementes aus, ergibt sich eine sehr kostengünstige Produktion des Gesamtbauteils, da nur ein (einheitliches) Formteil benötigt wird.The invention makes it possible to centrally grain the workpiece in a single operation. A previous marking is not necessary. In an advantageous embodiment, the grain is held permanently resilient in the guide of the web and thus enables marking with one hand, the other hand being able to hold the parallelogram. It is particularly advantageous to construct the wall parts from individual elements, so that the wall height can be increased by inserting more elements for damaged or asymmetrically chamfered workpiece ends. If you also carry out the web for guiding the grain in the form of such an element, the overall component is produced very cost-effectively, since only one (uniform) molded part is required.

Weitere Einzelheiten und Ausführungsbeispiele der Erfindung sowie deren Funktion werden anhand der Zeichnung und der nachfolgenden Beschreibung erläutert.Further details and exemplary embodiments of the invention and their function are explained on the basis of the drawing and the description below.

In der Zeichnung zeigen:

Fig. 1
eine Markiervorrichtung für Drechselteile mit Werkstück,
Fig. 2
eine Vorderansicht der Markiervorrichtung,
Fig. 3
eine Seitenansicht der Markiervorrichtung,
Fig. 4
Wandteile, Zusammenbau,
Fig. 5
Ansicht der Markiervorrichtung senkrecht auf die Schlagvorrichtung,
Fig. 6
schematische Darstellung eines Markierungsvorganges bei rechteckigem Werkstücksquerschnitt,
Fig. 7
schematische Darstellung eines Markierungsvorganges bei rundem Werkstücksquerschnitt,
Fig. 8
eine alternative Ausführung der Vorrichtung mit umfaßtem Rundwerkstück in Ansicht analog zu Fig. 1,
Fig. 9
die alternative Ausführung in Ansicht von vorne analog zu Fig. 2,
Fig. 10
die alternative Ausführung in Ansicht von der Seite analog zu Fig. 3,
Fig. 11
den schematischen Zusammenbau der Wandteile der alternativen Ausführung in perspektivischer Ansicht analog zu Fig. 4,
Fig. 12
die alternative Ausführung in Ansicht von oben analog zu Fig. 5,
Fig. 13
die Darstellung der Zentrierung eines Vierkantwerkstücks in Ansicht von oben bei herausgenommenem Körner,
Fig. 14
die Darstellung der Zentrierung eines Werkstücks mit rundem Querschnitt in Aussicht von oben bei herausgenommenem Körner.
The drawing shows:
Fig. 1
a marking device for turning parts with a workpiece,
Fig. 2
a front view of the marking device,
Fig. 3
a side view of the marking device,
Fig. 4
Wall parts, assembly,
Fig. 5
View of the marking device perpendicular to the impact device,
Fig. 6
schematic representation of a marking process with a rectangular workpiece cross section,
Fig. 7
schematic representation of a marking process with a round workpiece cross section,
Fig. 8
an alternative embodiment of the device with a circular workpiece in view analogous to FIG. 1,
Fig. 9
the alternative embodiment in front view analogous to Fig. 2,
Fig. 10
the alternative embodiment in a view from the side analogous to Fig. 3,
Fig. 11
the schematic assembly of the wall parts of the alternative embodiment in a perspective view analogous to FIG. 4,
Fig. 12
the alternative embodiment in top view analogous to FIG. 5,
Fig. 13
the representation of the centering of a square workpiece in a view from above with the grain removed,
Fig. 14
the representation of the centering of a workpiece with a round cross-section viewed from above with the grain removed.

Die Figur 1 zeigt die Ausbildung einer Markiervorrichtung für Drechselteile mit einem Werkstück 7. Die scharnierartig verbundenen Wandteile 1,2,3,4 umfassen das Werkstück 7 stirnseitig. Beim Markiervorgang berührt das Werkstück 7 den als Mittelparallele ausgebildeten Steg 5 und wird durch einen Stoß (Pfeil) auf die Schlagvorrichtung 6 zentrisch markiert, indem die Spitze des Körnereisens 9 in das Werkstück eindrückt.FIG. 1 shows the design of a marking device for turning parts with a workpiece 7. The hinge-like wall parts 1, 2, 3, 4 encompass the workpiece 7 on the end face. During the marking process, the workpiece 7 touches the web 5 designed as a central parallel and is marked centrally by an impact (arrow) on the striking device 6, by pressing the tip of the grain iron 9 into the workpiece.

Die Figur 2 zeigt eine Markiervorrichtung in der Vorderansicht, mit Sicht auf das Wandteil 2. Der Steg 5 ist auf zwei gegenüberliegenden Wandteilen 1,3 beweglich gelagert. Die Schlagvorrichtung 6 in Einheit mit dem Körnereisen 9 wird im geometrischen Zentrum des von den Wandteilen gebildeten Parallelogramms gehalten. Die Rückstellfeder 8 stellt die Schlagvorrichtung 6 und das Körnereisen 9 nach dem Körnen wieder in seine ursprüngliche Lage zurück.FIG. 2 shows a marking device in the front view, with a view of the wall part 2. The web 5 is movably mounted on two opposite wall parts 1, 3. The striking device 6 in unity with the grain iron 9 is held in the geometric center of the parallelogram formed by the wall parts. The return spring 8 returns the impact device 6 and the grain iron 9 back to its original position after the grain.

Die Figur 3 zeigt eine Markiervorrichtung in der Seitenansicht, mit Sicht auf das Wandte 1. Die bewegliche Verbindung der Wandteile untereinander ist durch eine Verzahnung der Wandteile und je einen Bolzen 10 realisiert.FIG. 3 shows a marking device in a side view, with a view of the wall 1. The movable connection of the wall parts to one another is realized by toothing the wall parts and one bolt 10 each.

Die Figur 4 zeigt den Zusammenbau zweier Wandteile 1,2. Dabei wird deutlich, daß alle Wandteile baugleich sind und ineinandergreifen nach Art einer Verzahnung.FIG. 4 shows the assembly of two wall parts 1, 2. It is clear that all wall parts are identical and interlock like a toothing.

Die Figur 5 zeigt die Markiervorrichtung mit Sicht senkrecht auf die Schlagvorrichtung 6, wobei die Vorrichtung zum Parallelogramm verschoben ist.FIG. 5 shows the marking device with a view perpendicular to the striking device 6, the device being shifted to the parallelogram.

Die Figur 6 zeigt schematisch die Lage einer zentral zu körnenden Werstückstirnseite 71 mit rechteckiger Form. Wichtig ist dabei das Anliegen zweier diagonal gegenüberliegenden Ecken des Werkstücks an zwei entsprechend gegenüberliegenden Ecken des Parallelogramms, das hierfür soweit von seiner quadratischen Grundgestalt verschert wird, bis diese geometrische Bedingung erfüllt wird.FIG. 6 schematically shows the position of a workpiece end face 71 to be centrally grained with a rectangular shape. It is important that two diagonally opposite corners of the workpiece rest on two correspondingly opposite corners of the parallelogram, which is sheared from its square basic shape until this geometric condition is met.

Die Figur 7 zeigt schematisch die Lage einer zentral zu körnenden Werkstückstirnseite 72 mit runder Form. Eine Zentrierung ist hier gegeben, wenn jede Seite des Parallelogramms Kontakt zum Werkstück hat.FIG. 7 schematically shows the position of a workpiece end face 72 to be centrally grained with a round shape. Centering is given here if each side of the parallelogram is in contact with the workpiece.

Die Figuren 8 bis 14 zeigen eine besonders vorteilhatte Ausführung der Vorrichtung, bei der die Wandteile 1',2',3',4' aus jeweils mehreren Einzelelementen 11,12,13,14 aufgebaut werden, die alle baugleich sind, ebenso wie der Steg 5'. Diese Elemente weisen an ihren Enden Ausnehmungen auf, die sich, von der Längskante gesehen, über die halbe Höhe erstrecken und so eine Verzahnung der Elemente ermöglichen. Dafür werden bei der Montage Elemente benachbarter Seiten (z. B. 1',2') jeweils einander entgegengewendet montiert, wie in Fig. 11 veranschaulicht ist. Das Zentrieren eines Werkstücks mit rechteckigem 71' bzw. rundem Querschnitt 72' ist in den Figuren 13 und 14 für diese Ausführung dargestellt und verläuft ebenso wie das in den Figuren 6 und 7 für die erste Ausführung veranschaulichte Vorgehen.Figures 8 to 14 show a particularly advantageous embodiment of the device, in which the wall parts 1 ', 2', 3 ', 4' are each made up of several individual elements 11, 12, 13, 14, which are all identical in construction, as is the case Bridge 5 '. These elements have recesses at their ends which, viewed from the longitudinal edge, extend over half the height and thus enable the elements to be interlocked. For this purpose, elements of adjacent sides (for example 1 ′, 2 ′) are in each case mounted opposite to one another, as illustrated in FIG. 11. The centering of a workpiece with a rectangular 71 'or round cross section 72' is shown in FIGS. 13 and 14 for this embodiment and proceeds in the same way as the procedure illustrated in FIGS. 6 and 7 for the first embodiment.

Die Elemente sind vorzugsweise aus Kunststoff hergestellt, können aber auch aus Metall oder Holz gebildet sein.The elements are preferably made of plastic, but can also be made of metal or wood.

Es versteht sich, daß die zu zentrierenden Werkstücke ebenfalls aus verschiedenen Werkstoffen bestehen können.It is understood that the workpieces to be centered can also consist of different materials.

Claims (7)

Vorrichtung zum zentrischen Markieren und Körnen der Stirnseite eines Drechselwerkstückes, dadurch gekennzeichnet, daß vier gleiche Wandteile (1,2,3,4;1',2',3',4') mittels vier Scharniervorrichtungen beweglich so miteinander verbunden sind, daß sie - stirnseitig betrachtet - ein gleichschenkliges Parallelogramm bilden, und an zwei gegenüberliegenden Wandteilen (1,3;1',3') stirnseitig mittig ein Steg (5;5') beweglich montiert ist, der in seinem Zentrum eine Vorrichtung zum Führen eines Körnereisens (9;9') aufweist.Device for centrically marking and graining the end face of a turning workpiece, characterized in that four identical wall parts (1, 2, 3, 4; 1 ', 2', 3 ', 4') are movably connected to one another by means of four hinge devices so that they - viewed on the end face - form an isosceles parallelogram, and on two opposite wall parts (1,3; 1 ', 3') a web (5; 5 ') is movably mounted on the end face in the center, which has a device for guiding a grain iron in its center ( 9; 9 '). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Körnereisen mit einer Schlagvorrichtung (6;6') versehen ist.Device according to claim 1, characterized in that the grain iron is provided with a striking device (6; 6 '). Vorrichtung nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, daß Körnereisen (9;9') und Schlagvorrichtung (6;6') vom Steg mittig gehalten werden und eine Schraubenfeder (8;8') zwischen Steg und Schlagvorrichtung die Einheit aus Körnereisen und Schlagvorrichtung rückstellt.Device according to one of claims 1 to 2, characterized in that the grain iron (9; 9 ') and the striking device (6; 6') are held in the middle by the web and a coil spring (8; 8 ') between the web and the striking device the unit made of grain iron and resets impact device. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Wandteile im Bereich der Scharniere miteinander verzahnt sind und ein Bolzen (10;10') durch die Verzahnung hindurch die bewegliche Scharnierverbindung realisiert.Apparatus according to claim 1, characterized in that the wall parts are toothed together in the area of the hinges and a bolt (10; 10 ') realizes the movable hinge connection through the toothing. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Wandteile des Parallelogramms jeweils aus einzelnen Elementen (11,12,13,14) bestehen.Device according to claim 1, characterized in that the wall parts of the parallelogram each consist of individual elements (11, 12, 13, 14). Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß mehrere Elemente (11,12,13,14) an einem Wandteil übereinander montiert sind.Device according to claim 5, characterized in that several elements (11, 12, 13, 14) are mounted one above the other on a wall part. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß der Steg (5;5') ebenfalls aus einem solchen Element (11,12,13,14) gebildet ist.Apparatus according to claim 5 or 6, characterized in that the web (5; 5 ') is also formed from such an element (11, 12, 13, 14).
EP95119201A 1994-12-07 1995-12-06 Marking device for lathe workpieces Expired - Lifetime EP0715931B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9419575U DE9419575U1 (en) 1994-12-07 1994-12-07 Marking device for turning parts
DE9419575U 1994-12-07

Publications (2)

Publication Number Publication Date
EP0715931A1 true EP0715931A1 (en) 1996-06-12
EP0715931B1 EP0715931B1 (en) 1999-07-28

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EP (1) EP0715931B1 (en)
AT (1) ATE182503T1 (en)
DE (2) DE9419575U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0824998A1 (en) * 1996-08-23 1998-02-25 Peter Martin Dufter Device for handling a machine tool
CN113459061A (en) * 2021-07-19 2021-10-01 正茂集团有限责任公司 Chain ring sample scribing positioner and sample positioning method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB142381A (en) * 1919-09-13 1920-05-06 Harold Wilson An improved device for use in centering and marking the centre of work
US1373367A (en) * 1920-07-19 1921-03-29 Summers Boyd Centering-square
US4084325A (en) * 1976-04-15 1978-04-18 Jones Jr Hiram Center finder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB142381A (en) * 1919-09-13 1920-05-06 Harold Wilson An improved device for use in centering and marking the centre of work
US1373367A (en) * 1920-07-19 1921-03-29 Summers Boyd Centering-square
US4084325A (en) * 1976-04-15 1978-04-18 Jones Jr Hiram Center finder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0824998A1 (en) * 1996-08-23 1998-02-25 Peter Martin Dufter Device for handling a machine tool
CN113459061A (en) * 2021-07-19 2021-10-01 正茂集团有限责任公司 Chain ring sample scribing positioner and sample positioning method

Also Published As

Publication number Publication date
DE59506463D1 (en) 1999-09-02
ATE182503T1 (en) 1999-08-15
DE9419575U1 (en) 1995-03-16
EP0715931B1 (en) 1999-07-28

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