DE4312937A1 - Deflectable mounting of a boring bar on the work spindle of a fine boring machine - Google Patents

Deflectable mounting of a boring bar on the work spindle of a fine boring machine

Info

Publication number
DE4312937A1
DE4312937A1 DE19934312937 DE4312937A DE4312937A1 DE 4312937 A1 DE4312937 A1 DE 4312937A1 DE 19934312937 DE19934312937 DE 19934312937 DE 4312937 A DE4312937 A DE 4312937A DE 4312937 A1 DE4312937 A1 DE 4312937A1
Authority
DE
Germany
Prior art keywords
boring bar
articulated frame
work spindle
trapezoidal
boring
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.)
Withdrawn
Application number
DE19934312937
Other languages
German (de)
Inventor
Roland Bathen
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.)
Mahle GmbH
Original Assignee
Mahle 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 Mahle GmbH filed Critical Mahle GmbH
Priority to DE19934312937 priority Critical patent/DE4312937A1/en
Priority to PCT/DE1994/000444 priority patent/WO1994025209A1/en
Publication of DE4312937A1 publication Critical patent/DE4312937A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/03—Boring heads
    • B23B29/034—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
    • B23B29/03432—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable during manufacturing
    • B23B29/03457—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable during manufacturing by pivoting the tool carriers or by elastic deformation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/02—Boring bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, 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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/34—Relative movement obtained by use of deformable elements, e.g. piezoelectric, magnetostrictive, elastic or thermally-dilatable elements

Description

Die Erfindung betrifft eine auslenkbare Lagerung einer ei­ nen Drehmeißel tragenden Bohrstange an der Arbeitsspindel einer Feinbohrmaschine zur Erzeugung unrunder Bohrungen.The invention relates to a deflectable storage of an egg boring bar on the work spindle a fine boring machine for creating out-of-round bores.

Durch eine solche Lagerung sollen beliebig unrunde Bohrun­ gen herstellbar sein. Zu diesem Zweck muß die Auslenkung im Arbeitsbetrieb der Bohrstange reaktionsschnell sein.Through such a storage arbitrarily out-of-round drilling gene producible. For this purpose the deflection in Working operation of the boring bar be responsive.

Zur Erzielung äußerst genauer Bohrungsgeometrien soll das freie Ende der Bohrstange in der Achse der Arbeitsspindel zusätzlich gelagert sein. Eine solche Lagerung ist allge­ mein als Reitstocklagerung der Bohrstange bekannt.To achieve extremely precise bore geometries, free end of the boring bar in the axis of the work spindle be additionally stored. Such storage is common my known as the tailstock bearing of the boring bar.

Eine grundsätzliche Lösung des vorstehenden Aufgabenkomple­ xes wird durch eine Ausbildung der Lagereinrichtung nach den kennzeichnenden Merkmalen des Anspruchs 1 erreicht.A basic solution to the above task xes is followed by training the storage facility the characterizing features of claim 1 achieved.

Zweckmäßige Ausgestaltungen sind Gegenstand der Unteran­ sprüche.Appropriate configurations are the subject of the Unteran claims.

Die Lösung des zweiten Teils der erfindungsgemäßen Aufgabe, nämlich die Lagerung des freien Endes der Bohrstange, be­ ruht auf den kinematischen Eigenschaften eines trapezförmi­ gen Gelenkrahmens, nach denen es möglich ist, die daran be­ festigte Bohrstange so zu verschwenken, daß ihr freies Ende in der Rotationsachse der Arbeitsspindel in einem Fixpunkt gelagert bleiben kann. Diese Eigenschaft ist zumindest für geringe Schwenkwinkel der Bohrstange, auf welche es erfin­ dungsgemäß allein ankommt, garantiert. Unter geringem Schwenkwinkel werden dabei solche Winkel verstanden, die durch eine Verschiebung der betreffenden Gelenkpunkte des Gelenkrahmens um weniger als etwa 1 mm erzeugt werden.The solution of the second part of the task according to the invention, namely the storage of the free end of the boring bar, be rests on the kinematic properties of a trapezoidal articulated frame, according to which it is possible to be attached to it fixed pivoting boring bar so that its free end in the axis of rotation of the work spindle at a fixed point  can remain stored. This property is at least for small swivel angle of the boring bar on which it is invented arrives alone, guaranteed. Under little Swivel angles are understood to mean such angles that by moving the relevant hinge points of the Articulated frame can be generated by less than about 1 mm.

In der Zeichnung sind eine Prinzipdarstellung sowie ein Ausführungsbeispiel der Erfindung dargestellt: Es zeigtIn the drawing there is a schematic diagram as well as a Illustrated embodiment of the invention: It shows

Fig. 1 das Prinzip eines erfindungsgemäßen, durch einen Piezo-Motor verschwenkbaren Gelenk­ rahmens als Bohrstangen-Lagereinrichtung, Fig. 1 shows the principle of the invention a, through a piezo motor pivotable joint frame as boring bars bearing means,

Fig. 2 eine perspektivische Ansicht eines Gelenk­ rahmens an einer Arbeitsspindel mit aufge­ setzter Bohrstange, Fig. 2 is a perspective view of an articulated frame to a work spindle with an attached drill rod

Fig. 3 eine Ansicht einer speziellen Ausbildung eines Gelenkrahmens. Fig. 3 is a view of a special design of an articulated frame.

Eine Bohrstange 1 ist über einen Gelenkrahmen 2 gelenkig an der Arbeitsspindel 3 einer Feinbohrmaschine gelagert.A boring bar 1 is articulated on the work spindle 3 of a fine boring machine via an articulated frame 2 .

Die Bohrstange 1 ist an ihrem freien Ende in einem Reit­ stock 4 innerhalb der Rotationsachse der Arbeitsspindel 3 gegengelagert.The boring bar 1 is counter-mounted at its free end in a riding stock 4 within the axis of rotation of the work spindle 3 .

Der Gelenkrahmen 2 ist durch einen Piezo-Motor 5 gegenüber der Arbeitsspindel 3 verschwenkbar. The articulated frame 2 can be pivoted relative to the work spindle 3 by means of a piezo motor 5 .

Der Gelenkrahmen 2 besteht im wesentlichen aus vier Rahmen­ teilen, die durch vier Gelenke 6 in einer Ebene verschwenk­ bar miteinander verbunden sind. Die Gelenke 6 befinden sich dabei auf den Eckpunkten eines Trapezes. Die einzelnen Ge­ lenkrahmenteile bilden dabei die Trapezseiten des durch die Gelenke 6 bestimmten Trapezes. Die Trapezbasisseite 7 ist fest mit der Arbeitsspindel 3 verbunden. Die Bohrstange 1 ist fest mit der kurzen, der langen Trapezbasisseite paral­ lel gegenüberliegenden Seite 8 verbunden.The articulated frame 2 consists essentially of four parts which are pivotally connected to one another by four joints 6 in one plane. The joints 6 are located on the corner points of a trapezoid. The individual Ge steering frame parts form the trapezoidal sides of the trapezoid determined by the joints 6 . The trapezoid base side 7 is firmly connected to the work spindle 3 . The boring bar 1 is firmly connected to the short side 8 , which is located parallel to the long trapezoidal base side.

Der Piezo-Motor 5 stützt sich an seinem einen Ende an einer fest mit der Trapezbasisseite 7 verbundenen Stütze 9 ab. An seinem anderen Ende ist er an eine der beiden kurzen Tra­ pezseiten 10 angelenkt. Durch Ausdehnung und Kontraktion zwischen den Anlenkpunkten bewirkt der Piezo-Motor 5 eine Verschwenkung des Gelenkrahmens 2.The piezo motor 5 is supported at one end on a support 9 which is firmly connected to the trapezoid base side 7 . At its other end, it is articulated to one of the two short trapezoid sides 10 . The piezo motor 5 causes the articulated frame 2 to pivot by expansion and contraction between the articulation points.

Bei dem Verschwenken des Gelenkrahmens 2 bewegen sich die Gelenke 6, die an der Trapezseite 8 liegen, mit der die Bohrstange 1 fest verbunden ist, zumindest bei einer nur geringfügigen Verschwenkung des Rahmens auf einem Kreis K1, dessen Mittelpunkt M durch den Schnittpunkt der Verlänge­ rungen der Trapezseiten 10 mit der Rotationsachse der Ar­ beitsspindel 3 liegt, wobei dieser Mittelpunkt M seine ra­ diale und axiale Lage zu der Arbeitsspindel 3, zumindest bei den erfindungsgemäß allein interessierenden geringen Verschwenkungen des Gelenkrahmens 2, nicht verändert. Da­ durch ist in diesem Mittelpunkt M eine Reitstocklagerung der Bohrstange 1 möglich. Ein neben dem Mittelpunkt M auf der Bohrstange 1 befestigter Drehmeißel 13 bewegt sich bei der Schwenkung der Bohrstange 1 auf einer Kreisbahn K2, was zu der gewünschten mit dem Drehmeißel vorzunehmenden Durch­ messer-Änderung bei der Feinbearbeitung einer Bohrung führt.When pivoting the articulated frame 2 , the joints 6 , which are located on the trapezoidal side 8 , with which the boring bar 1 is firmly connected, at least with only a slight pivoting of the frame on a circle K1, whose center M wrestles through the intersection of the extensions the trapezoidal sides 10 with the axis of rotation of the ar beitsspindel 3 , this center point M does not change its ra diale and axial position to the work spindle 3 , at least in the case of the small swivels of the articulated frame 2 which are of sole interest according to the invention. Since a tailstock mounting of the boring bar 1 is possible in this center M. A attached to the center M on the boring bar 1 turning tool 13 moves when pivoting the boring bar 1 on a circular path K2, which leads to the desired diameter change to be made with the turning tool during the fine machining of a bore.

Wenn der Piezo-Motor 5 nur eine Zustellbewegung in einer Richtung ausführt, erfolgt die Rückführung in eine unver­ schwenkte Ausgangslage der Bohrstange 1 über eine Rückhol­ feder 11. Bei der Ausführung nach Fig. 3 ist der Gelenkrah­ men 2 ein einstückiges Teil. Dieses Teil ist beispielsweise aus Vollmaterial herausgearbeitet. Das Material selbst kann Stahl sein. Die Formgebung des Gelenkrahmens ist derart, daß die einzelnen Seitenteile 7, 8 und 10 jeweils für sich biegesteif sind, während sie an ihren gegenseitigen Über­ gängen im Sinne der Gelenke 6 elastisch verformbar sind. Diese elastische Verformbarkeit wird durch Einschnürungen 12 in den als Gelenke 6 dienenden Bereichen des Gelenkrah­ mens erreicht. Bei dieser Ausführung kann die in der Prin­ zipdarstellung nach Fig. 1 vorgesehene Rückholfeder 11 ent­ fallen, da der Rahmen in den Einschnürbereichen selbst ela­ stisch federnd ist.If the piezo motor 5 only executes an infeed movement in one direction, the return takes place in an undeflected starting position of the boring bar 1 via a return spring 11 . In the embodiment of Fig. 3 is the Gelenkrah men 2 a one-piece part. This part is made from solid material, for example. The material itself can be steel. The shape of the joint frame is such that the individual side parts 7 , 8 and 10 are each rigid in itself, while they are elastically deformable at their mutual transitions in the sense of the joints 6 . This elastic deformability is achieved by constrictions 12 in the regions of the articulated frame serving as joints 6 . In this embodiment, the return spring 11 provided in the principle shown in FIG. 1 may fall, since the frame itself is elastic in the constricted areas.

Der Einsatz eines Piezo-Motors 5 hat den besonderen Vor­ teil, daß die Zustellbewegungen einerseits sehr schnell er­ folgen können und daß andererseits auch die zum Aufbringen der Schneidkräfte erforderlichen Zustellkräfte problemlos möglich sind. Durch die Verwendung eines elektrischen Stellgliedes ist eine Steuerung der Zustellbewegungen des Motors 5 nach einem elektronisch gespeicherten Programm für einen bestimmten Formverlauf der zu erzeugenden Bohrung möglich.The use of a piezo motor 5 has the special part before that the feed movements, on the one hand, he can follow very quickly and that, on the other hand, the feed forces required to apply the cutting forces are possible without any problems. By using an electrical actuator, it is possible to control the infeed movements of the motor 5 according to an electronically stored program for a specific shape of the bore to be produced.

Claims (2)

1. Auslenkbare Lagerung einer einen Drehmeißel tragenden Bohrstange an der Arbeitsspindel einer Feinbohrmaschine zur Erzeugung unrunder Bohrungen, gekennzeichnet durch einen Gelenkrahmen (2) als Lagereinrichtung mit in den Ecken eines Trapezes liegenden Gelenken (6), die ein Verschwenken des Gelenkrahmens (2) in dessen Ebene er­ lauben, dessen Trapezbasisseite (7) fest mit der Ar­ beitsspindel (3) und dessen parallel gegenüber liegende kürzere Trapezseite (8) fest mit der axial mit der Ar­ beitsspindelachse fluchtenden Bohrstange (1) verbunden ist, wobei dieser Gelenkrahmen (2) durch einen an dem Trapezbasisseitenteil (7) befestigten Piezo-Motor (5) durch Anlenkung an eines der Trapezseitenteile (10) ge­ ringfügig verschwenkbar ist, wobei das freie Ende der Bohrstange (1) in der Achse der Arbeitsspindel (3) in einem festen Gegenlager (Reitstock 4) drehbar gelagert ist, das im Bereich des Schnittpunktes der Verlängerun­ gen der beiden übrigen Trapezseitenteile (10) mit der Spindelachse liegt.1. Deflectable mounting of a boring bar carrying a turning tool on the work spindle of a fine boring machine for producing non-circular bores, characterized by an articulated frame ( 2 ) as a bearing device with joints ( 6 ) lying in the corners of a trapezoid, which pivot the articulated frame ( 2 ) in it Plane he leave, whose trapezoidal base side ( 7 ) is firmly connected to the working spindle ( 3 ) and whose parallel opposite shorter trapezoidal side ( 8 ) is firmly connected to the boring bar ( 1 ) axially aligned with the working spindle axis, this articulated frame ( 2 ) being through a piezo motor ( 5 ) fastened to the trapezoidal base side part ( 7 ) can be pivoted slightly by articulation on one of the trapezoidal side parts ( 10 ), the free end of the boring bar ( 1 ) in the axis of the work spindle ( 3 ) in a fixed counter bearing ( Tailstock 4) is rotatably mounted, in the area of the intersection of the extensions of the other two trapezoidal side parts ( 10 ) lies with the spindle axis. 2. Auslenkbare Lagerung nach Anspruch 1, dadurch gekennzeichnet, daß der Gelenkrahmen (2) einstückig mit in den Ecken als elastisch rückfedernde Gelenke (6) wirkenden Ein­ schnürungen (12) ausgebildet ist.2. Deflectable mounting according to claim 1, characterized in that the articulated frame ( 2 ) in one piece with in the corners as elastic resilient joints ( 6 ) acting A laces ( 12 ) is formed.
DE19934312937 1993-04-21 1993-04-21 Deflectable mounting of a boring bar on the work spindle of a fine boring machine Withdrawn DE4312937A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19934312937 DE4312937A1 (en) 1993-04-21 1993-04-21 Deflectable mounting of a boring bar on the work spindle of a fine boring machine
PCT/DE1994/000444 WO1994025209A1 (en) 1993-04-21 1994-04-19 Variable mounting of a boring bar on the work spindle of a fineboring machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19934312937 DE4312937A1 (en) 1993-04-21 1993-04-21 Deflectable mounting of a boring bar on the work spindle of a fine boring machine

Publications (1)

Publication Number Publication Date
DE4312937A1 true DE4312937A1 (en) 1994-10-27

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DE19934312937 Withdrawn DE4312937A1 (en) 1993-04-21 1993-04-21 Deflectable mounting of a boring bar on the work spindle of a fine boring machine

Country Status (2)

Country Link
DE (1) DE4312937A1 (en)
WO (1) WO1994025209A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442218A1 (en) * 1994-11-26 1996-05-30 Mahle Gmbh Fine boring machine for creating out-of-round bores
DE19710601A1 (en) * 1997-03-14 1998-09-24 Univ Magdeburg Tech Movement generator with three actuators
EP0999005A1 (en) * 1998-11-02 2000-05-10 Gerhard Dr.-Ing. Widl Chuck for a machine tool
EP0999004A2 (en) * 1998-11-02 2000-05-10 Gerhard Dr.-Ing. Widl Chuck for a machine tool
WO2005072897A3 (en) * 2004-02-02 2005-12-01 Schoeller Bleckmann Oilfield T Drill, and drilling method
DE102008063945A1 (en) * 2008-12-19 2010-06-24 Ks Kolbenschmidt Gmbh Method for designing hole profile of non-circular bolt holes for receiving bearing bushes in piston of internal combustion engine, involves pivoting movable center point over oscillating lever of electronic mold head
DE102005020501B4 (en) * 2004-04-30 2014-01-16 Ks Kolbenschmidt Gmbh Method for introducing a non-round pin bore in a piston of an internal combustion engine
DE102013218888A1 (en) * 2013-09-20 2015-04-09 Mahle International Gmbh tool spindle

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US9095955B2 (en) 2012-08-16 2015-08-04 Omax Corporation Control valves for waterjet systems and related devices, systems and methods
US8904912B2 (en) 2012-08-16 2014-12-09 Omax Corporation Control valves for waterjet systems and related devices, systems, and methods
US11554461B1 (en) 2018-02-13 2023-01-17 Omax Corporation Articulating apparatus of a waterjet system and related technology
CN115698507A (en) 2020-03-30 2023-02-03 海别得公司 Cylinder for liquid injection pump with multifunctional interface longitudinal end

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DE1552435B2 (en) * 1967-02-28 1973-03-29 Spezialnoje Konstruktorskoje Bjuro Skbars, Odessa (Sowjetunion) DEVICE FOR ADJUSTING A SPINDLE HEAD OF A MACHINE TOOL
DE3332243A1 (en) * 1983-09-07 1985-03-21 J. Kühn GmbH & Co Präzisionswerkzeug KG, 4270 Dorsten Rotatable machining device, in particular a boring head or the like
DE3446275C1 (en) * 1984-12-19 1986-07-24 Samson Ag, 6000 Frankfurt Rotating drill head with an infeed device arranged between a connecting shank and a tool carrier
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442218A1 (en) * 1994-11-26 1996-05-30 Mahle Gmbh Fine boring machine for creating out-of-round bores
US5782585A (en) * 1994-11-26 1998-07-21 Mahle Gmbh Precision drill for drilling noncircular bores
DE19710601A1 (en) * 1997-03-14 1998-09-24 Univ Magdeburg Tech Movement generator with three actuators
DE19710601C2 (en) * 1997-03-14 1999-05-20 Univ Magdeburg Tech Motion generator
EP0999005A1 (en) * 1998-11-02 2000-05-10 Gerhard Dr.-Ing. Widl Chuck for a machine tool
EP0999004A2 (en) * 1998-11-02 2000-05-10 Gerhard Dr.-Ing. Widl Chuck for a machine tool
EP0999004A3 (en) * 1998-11-02 2003-07-16 Index-Werke Gmbh & Co. Kg Hahn & Tessky Chuck for a machine tool
EP1344594A1 (en) * 1998-11-02 2003-09-17 Index-Werke Gmbh & Co. Kg Hahn & Tessky Chuck
WO2005072897A3 (en) * 2004-02-02 2005-12-01 Schoeller Bleckmann Oilfield T Drill, and drilling method
US7824135B2 (en) 2004-02-02 2010-11-02 Schoeller-Bleckmann Oilfield Technology Gmbh & Co. Kg Drill, and drilling method
EP2730358A1 (en) * 2004-02-02 2014-05-14 SCHOELLER-BLECKMANN Oilfield Technology GmbH Method of drilling
DE102005020501B4 (en) * 2004-04-30 2014-01-16 Ks Kolbenschmidt Gmbh Method for introducing a non-round pin bore in a piston of an internal combustion engine
DE102008063945A1 (en) * 2008-12-19 2010-06-24 Ks Kolbenschmidt Gmbh Method for designing hole profile of non-circular bolt holes for receiving bearing bushes in piston of internal combustion engine, involves pivoting movable center point over oscillating lever of electronic mold head
DE102008063945B4 (en) * 2008-12-19 2015-06-18 Ks Kolbenschmidt Gmbh Shaped bore profiles for a pin bearing
DE102013218888A1 (en) * 2013-09-20 2015-04-09 Mahle International Gmbh tool spindle
US9969038B2 (en) 2013-09-20 2018-05-15 Mahle International Gmbh Tool spindle having an active magnetic bearing

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