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WO1997031751A1 - Procede de correction de positionnement de pieces et d'outils dans des machines-outils - Google Patents

Procede de correction de positionnement de pieces et d'outils dans des machines-outils Download PDF

Info

Publication number
WO1997031751A1
WO1997031751A1 PCT/EP1997/000188 EP9700188W WO9731751A1 WO 1997031751 A1 WO1997031751 A1 WO 1997031751A1 EP 9700188 W EP9700188 W EP 9700188W WO 9731751 A1 WO9731751 A1 WO 9731751A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
workpiece
measuring
machine
positions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1997/000188
Other languages
German (de)
English (en)
Inventor
Wolfgang Horn
Horst Sanzenbacher
Karlhermann Sus
Sören WELB
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.)
Hueller Hille GmbH
Original Assignee
Hueller Hille 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 Hueller Hille GmbH filed Critical Hueller Hille GmbH
Priority to EP97901538A priority Critical patent/EP0883466A1/fr
Priority to AU15417/97A priority patent/AU1541797A/en
Publication of WO1997031751A1 publication Critical patent/WO1997031751A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/404—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/401—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
    • G05B19/4015—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes going to a reference at the beginning of machine cycle, e.g. for calibration
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/37—Measurements
    • G05B2219/37415—By cutting light beam
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/49—Nc machine tool, till multiple
    • G05B2219/49207—Compensate thermal displacement using measured distance
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50042—Return to origin, reference point, zero point, homing
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50133—With optical beam, tool crosses beam

Definitions

  • the invention relates to a method for correcting the position determination of workpieces and tools that can be moved relative to one another in processing machines, in particular CNC machining centers, with the aid of machine-internal measuring systems.
  • the invention also relates to a processing machine, in particular a CNC center, for carrying out the method.
  • Positions of the workpiece and / or the tool are regularly recorded with the aid of machine-internal measuring systems which, however, cannot record the thermally induced changes in position in the working area of the tool. Since the setpoint values for the positions of the workpiece and tool specified by a machine control system depend on internal machine measurement systems can be specified, this can lead to machining inaccuracies.
  • the object of the invention is to avoid machining inaccuracies due to thermally induced changes in position of the workpiece and / or tool in the working area of the tool.
  • This object is achieved in that the workpiece or the workpiece carrier and the tool or the tool carrier with respectively assigned measuring points or measuring edges are moved simultaneously or at short intervals in succession through a fixed optical measuring barrier, that the respective positions of the workpiece when the measuring barrier is interrupted or the tool can be detected with the aid of the machine's internal measuring system, that the detected positions with stored positions may be from an earlier one
  • Measurement are compared and that the difference between the detected position and the stored position is used to correct the machine control.
  • the position detected in each case is preferably stored after a correction value has been formed, so that an earlier measurement serves as a reference for the next measurement.
  • all changes in position of the workpiece and tool or their carrier in the working area of the tool, regardless of the source from which they originate, can be recorded and used to form a correction value for the machine control.
  • the method can be used to generate correction values for each of the three spatial axes if corresponding optical measuring barriers are set up.
  • an optical beam e.g. a laser beam as
  • Measuring barrier used. Since also a beam of finite dimensions , it is advisable to move the workpiece and the tool through the measuring barrier in the same direction to ensure that the actual positions of the workpiece and tool are recorded in the same place.
  • the invention also relates to a processing machine, in particular a CNC processing center, with a workpiece holder and a tool holder, which can be moved relative to one another, and with a housing, which surrounds at least the working area of a tool connected to the tool holder, for carrying out the method described above .
  • This processing machine is characterized in that transmitters and receivers for an optical beam which cross the working area of the tool are arranged on opposite walls of the housing.
  • the optical steel should extend orthogonally to the direction of movement of the workpiece carrier and / or the tool carrier.
  • Fig. 1 shows schematically and partially an end view of a
  • FIG. 3 another embodiment of the object according to FIG. 1
  • FIG. 4 a plan view of the object according to FIG. 3.
  • the machine tool shown includes a machine bed 1, only indicated, with rails 2, on which a machine table 3 and a workpiece carrier with a workpiece 4 arranged thereon can be moved.
  • the rails 2 extend in the Z direction in accordance with the coordinate cross 5 indicated at the top right in FIG. 1.
  • the processing machine also includes a spindle 7 mounted in a spindle carrier 6, the spindle nose 8 of which is set up for the connection of a tool, not shown.
  • the axis of the spindle 7 also extends in the Z direction.
  • the spindle carrier 6 with the spindle 7 is movable in the Z direction.
  • the working area of the tool is crossed by an optical beam 9 which, in the embodiment shown, extends in an X-Y plane at an angle to the X direction and thus orthogonally to the Z direction.
  • the fixed beam 9 starts from a transmitter 10 and hits a receiver 11.
  • the transmitter 10 and the receiver 11 are arranged on the opposite sides of a housing, not shown, which at least surrounds the working area of the tool.
  • the spindle nose 8 has as its measuring edge 13 its end face, which extends in an X-Y plane.
  • both the machine table 3 or the workpiece carrier and the spindle carrier 6 are assigned to machine-internal measuring systems with which the respective positions of workpiece carrier 4 and spindle carrier 6 are detected, which then
  • the machine table 3 is a rotary table with two workpieces 4 arranged thereon, which are also rotatable.
  • 4a shows an enlarged part of the workpiece 4 with the associated measuring edge 12, which is also open in the Z direction.
  • the transmitter 10 and the receiver 11 for the fixed beam 9 are connected to the machine bed 1 like the other machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Machine Tool Sensing Apparatuses (AREA)
  • Automatic Control Of Machine Tools (AREA)

Abstract

L'invention concerne un procédé de correction de positionnement de pièces et d'outils pouvant se déplacer les uns par rapport aux autres dans des machines d'usinage, notamment des centres d'usinage à commande numérique par calculateur, à l'aide de systèmes de mesure internes. Des imperfections d'usinage dues à des modifications de position de pièces et/ou d'outils inhérentes à des contraintes d'ordre thermique peuvent être évitées dans la zone de travail de l'outil, si la pièce et l'outil sont déplacés simultanément ou successivement à un court intervalle à travers une barrière de mesure optique fixe. En cas d'interruption de la barrière de mesure, chaque position de la pièce ou de l'outil est détectée à l'aide du système de mesure interne. Les positions détectées sont comparées à des positions mémorisées lors d'une mesure antérieure et les différence entre la position détectée et la position mémorisée sert à corriger la commande de la machine. L'invention concerne en outre une machine d'usinage appropriée pour mettre ledit procédé en oeuvre.
PCT/EP1997/000188 1996-02-29 1997-01-17 Procede de correction de positionnement de pieces et d'outils dans des machines-outils Ceased WO1997031751A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP97901538A EP0883466A1 (fr) 1996-02-29 1997-01-17 Procede de correction de positionnement de pieces et d'outils dans des machines-outils
AU15417/97A AU1541797A (en) 1996-02-29 1997-01-17 Method of correcting the determination of workpiece and tool positions in machine tools

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19607599.8 1996-02-29
DE19607599A DE19607599A1 (de) 1996-02-29 1996-02-29 Verfahren zur Korrektur der Positionsbestimmung von Werkstücken und Werkzeugen in Bearbeitungsmaschinen

Publications (1)

Publication Number Publication Date
WO1997031751A1 true WO1997031751A1 (fr) 1997-09-04

Family

ID=7786724

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/000188 Ceased WO1997031751A1 (fr) 1996-02-29 1997-01-17 Procede de correction de positionnement de pieces et d'outils dans des machines-outils

Country Status (5)

Country Link
EP (1) EP0883466A1 (fr)
AU (1) AU1541797A (fr)
CA (1) CA2247322A1 (fr)
DE (1) DE19607599A1 (fr)
WO (1) WO1997031751A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1745884A1 (fr) 2005-07-21 2007-01-24 Cross Hüller GmbH Procédé pour détecter un débattement ou un déséquilibre d'un outil
RU2634529C1 (ru) * 2016-05-24 2017-10-31 Борис Михайлович Дмитриев Способ испытания металлорежущих станков по параметрам точности при действии термических возмущений

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859360C2 (de) * 1998-12-22 2003-07-17 Schwaebische Werkzeugmaschinen Werkzeugmaschine mit piezoelektrischer Positionskorrektureinrichtung
DE10330915B4 (de) * 2003-07-04 2008-01-03 Chiron-Werke Gmbh & Co Kg Verfahren zur Kompensation von Verlagerungen
DE102008004849B4 (de) * 2008-01-17 2012-02-09 Vollmer Werke Maschinenfabrik Gmbh Vorrichtung und Verfahren zum Bearbeiten von Werkstücken
EP2163959A1 (fr) * 2008-09-16 2010-03-17 Tornos SA Procédé de calibration du positionnement du point de travail d'un outil sur une machine-outil
DE102009036013A1 (de) * 2009-08-04 2011-02-17 Weinmann Holzbausystemtechnik Gmbh Verfahren zur Bearbeitung von Werkstücken
EP2325710A1 (fr) * 2009-10-14 2011-05-25 Tornos SA Procédé et système de compenser les variations dimensionnelles dans une machine d'usinage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4808000A (en) 1986-10-15 1989-02-28 Union Oil Company Of California Positioning device and method
WO1990010192A1 (fr) * 1989-02-25 1990-09-07 Herbert Schulz Procede de mesure de tranchants
DE4030185A1 (de) * 1990-09-24 1992-03-26 Siemens Ag Verfahren zum kalibrieren eines motorisch angetriebenen werkzeuges in bezug auf ein mit diesem zu bearbeitendes werkstueck sowie vorrichtung zur durchfuehrung des verfahrens

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD109197A1 (fr) * 1973-10-29 1974-10-20
DE3218754C2 (de) * 1982-05-18 1985-11-28 Friedrich Deckel AG, 8000 München Verfahren und Einrichtung zur Vermessung eines in einem zustellbaren Werkzeughalter einer Werkzeugmaschine eingespannten Werkzeugs
EP0268622A1 (fr) * 1986-06-12 1988-06-01 Mas Vertriebs Gmbh Für Zerspanungstechnik Procede, appareil de mesure, porte-outil reglable avec precision et dispositif compensateur pour le controle de qualite en cours d'operation de machines-outils d'usinage
DE58900942D1 (de) * 1988-06-07 1992-04-16 Gottlieb Horak Verfahren und einrichtung zum beruehrungslosen ausmessen eines werkstueckes.
DE4023581A1 (de) * 1990-07-25 1992-02-13 Heller Geb Gmbh Maschf Verfahren zum vermessen eines werkzeuges in einer numerisch gesteuerten bearbeitungsmaschine mit automatischem werkzeugwechsel und einrichtung zur durchfuehrung dieses verfahrens
DE4028006C2 (de) * 1990-09-04 1994-04-14 Deutsche Aerospace Verfahren zur Kompensation von maßlichen Abweichungen von NC- oder CNC-gesteuerten Werkzeugmaschinen
DE4238504C2 (de) * 1992-11-14 1996-04-25 Chiron Werke Gmbh Verfahren zum Vermessen eines Werkzeuges

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4808000A (en) 1986-10-15 1989-02-28 Union Oil Company Of California Positioning device and method
WO1990010192A1 (fr) * 1989-02-25 1990-09-07 Herbert Schulz Procede de mesure de tranchants
DE4030185A1 (de) * 1990-09-24 1992-03-26 Siemens Ag Verfahren zum kalibrieren eines motorisch angetriebenen werkzeuges in bezug auf ein mit diesem zu bearbeitendes werkstueck sowie vorrichtung zur durchfuehrung des verfahrens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1745884A1 (fr) 2005-07-21 2007-01-24 Cross Hüller GmbH Procédé pour détecter un débattement ou un déséquilibre d'un outil
US7217071B2 (en) 2005-07-21 2007-05-15 Cross Huller Gmbh Method for testing the fit or imbalance of a tool
RU2634529C1 (ru) * 2016-05-24 2017-10-31 Борис Михайлович Дмитриев Способ испытания металлорежущих станков по параметрам точности при действии термических возмущений

Also Published As

Publication number Publication date
AU1541797A (en) 1997-09-16
EP0883466A1 (fr) 1998-12-16
CA2247322A1 (fr) 1997-09-04
DE19607599A1 (de) 1997-09-04

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