EP3595844A1 - Ensemble de moyen de serrage pour une machine-outil ainsi que machine-outil avec l'ensemble de moyens de serrage - Google Patents

Ensemble de moyen de serrage pour une machine-outil ainsi que machine-outil avec l'ensemble de moyens de serrage

Info

Publication number
EP3595844A1
EP3595844A1 EP18714427.4A EP18714427A EP3595844A1 EP 3595844 A1 EP3595844 A1 EP 3595844A1 EP 18714427 A EP18714427 A EP 18714427A EP 3595844 A1 EP3595844 A1 EP 3595844A1
Authority
EP
European Patent Office
Prior art keywords
tool
workpiece
actuator
arrangement
machine tool
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
EP18714427.4A
Other languages
German (de)
English (en)
Inventor
Michael Haberzettl
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP3595844A1 publication Critical patent/EP3595844A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
    • B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
    • B23Q17/0971—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring mechanical vibrations of parts of the machine
    • B23Q17/0976—Detection or control of chatter
    • 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
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means

Definitions

  • the invention relates to a clamping device arrangement for a machine tool having the features of the preamble of claim 1.
  • the invention also relates to a machine tool with this clamping device arrangement.
  • machining of the workpieces can lead to vibrations of the workpiece or the tool.
  • vibrations are amplified when a feed rate for a tool is set too high during machining.
  • This can, for example, lead to a "chattering" during a turning operation, wherein a characteristic, regular chattering pattern or chatter marks are applied to the workpiece, so that the machining quality on the workpiece is reduced
  • DE 10 2006 049 867 A1 discloses a machine tool with a workpiece clamping device for clamping a workpiece and with a tool table, which is movable by means of an electric motor.
  • the Werk Swisseinspannvorraum and thus the workpiece are movable relative to the tool table by means of a piezoelectric actuator.
  • a piezoelectric table is permanently mounted on the tool table, the piezoelectric actuators being arranged between the workpiece clamping device and the piezoelectric table.
  • the known machine tool is designed to greatly reduce vibrations such as chatter vibrations.
  • the invention relates to a clamping device arrangement which is suitable and / or designed for use in any conventional machine tool.
  • the machine tool has a tool for machining a workpiece.
  • the tool is in particular a tool for separating, in particular for machining.
  • the tool can be designed as a drilling, milling, turning or broaching tool.
  • the workpiece is particularly preferably realized as a metallic workpiece.
  • the tensioning means arrangement has a tensioning means, which can also be referred to as a tensioning means device.
  • the clamping device has a machine interface for coupling to the machine tool and a workpiece interface for receiving the workpiece.
  • the clamping means is designed as a receiving device which is arranged between the workpiece and the machine tool.
  • the clamping means can also be referred to as an adapter for the workpiece to the machine tool.
  • the clamping means rotates together with the workpiece during machining.
  • the tool is arranged stationary or at least only delivered.
  • the clamping device arrangement has a sensor arrangement, wherein the sensor arrangement is designed to receive vibrations of the tool as sensor data.
  • the vibrations of the tool thus form a measured variable in the sensor arrangement.
  • the measured variable and / or the vibrations can be removed directly on the tool.
  • the vibrations of the tool are transmitted directly to the tool holder, so that the vibrations of the tool on the tool holder are unadulterated or virtually unadulterated.
  • the clamping device arrangement further has a control device for receiving the sensor data of the sensor arrangement.
  • the control device is designed, for example, as a digital data processing device. In particular, this can be realized as a microcontroller, a computer, etc. Alternatively, this may be designed as an analog data processing device or as a combination of digital and analog data processing device.
  • the tensioning means comprise at least one actuator arranged on the tensioning device, which actuator is particularly preferably operated with external energy.
  • the at least one actuator is arranged on the clamping means itself, an installation of a clamping device according to the invention is independent of the type of machine tool feasible. Thus older machine types can be easily converted and the quality of the machined workpieces can be increased.
  • the at least one actuator is designed as an active actuator.
  • the controller is programmatically and / or circuitry designed to evaluate the sensor data and based on the sensor data and / or their evaluation to control the actuator.
  • the activation of the actuator is done so that the vibrations of the tool are compensated.
  • the actuator is controlled so that the negative consequences for the machining of the workpiece are reduced or eliminated.
  • the activation of the actuator takes place in particular in real time, in particular with a control frequency equal to or higher than the main frequencies of the vibrations.
  • the clamping means is designed as an active clamping means which compensates or compensates for vibrations caused by the machining on the tool by manipulation of the workpiece by means of the actuator.
  • the clamping device arrangement makes it possible to improve the machining result of the machine tool or, alternatively, to allow higher feed speeds, thereby making the production process more cost-effective.
  • the clamping means is formed as an encapsulated system, which can be adapted to any machine tool or at least on many machine tools.
  • control device is designed to control the actuator in such a way that the workpiece is counter-oscillated in order to generate an extinction of the oscillations of the tool.
  • a feedforward control is implemented by the control device and / or the clamping device arrangement.
  • the basic principle of feedforward control is to compensate for a disturbance on a primary track - here on the tool - by imposing a counter-swing on the system via a secondary track - here on the workpiece - at the exit of the primary track - Here on the machining zone between the tool and workpiece - to achieve vibration cancellation.
  • the countervibration is calculated directly from the reference signal acting on the input of the primary link - here the sensor data. Therefore, the term feedforward control for the feedforward control, in particular feedforward control, control or control, is also common.
  • the workpiece interface is formed as a chuck, which, for example can be opened and closed to clamp the workpiece.
  • the chuck is realized as a lathe chuck.
  • the workpiece can be clamped directly into the clamping device.
  • the transmission of the countervibrations of the at least one actuator to the workpiece are particularly easy to implement.
  • the machine interface is designed for coupling to a machine flange.
  • the machine interface can be a standardized connection according to DIN ISO 702-1 to 702-4 (issued April 2010).
  • it may be a clip exchange closure, such as a bayonet closure act. This allows a short-term use of a single clamping device arrangement in alternation with several different machine tools of an operation.
  • decoupling modules are provided between the clamping means and the machine flange, which prevent vibrations transmitted from the clamping means to the machine tool.
  • the decoupling modules can be integrated in particular in the clamping device and / or in the machine flange.
  • Such a decoupling module is essentially a passive bearing, which is arranged in particular adjacent to the machine flange contact surfaces.
  • decoupling modules for example, inserts made of granite, reactive resin concrete or the like can be used.
  • the sensor arrangement has at least one piezoelectric sensor.
  • Such piezoelectric sensors can record vibrations with very high frequencies with low errors.
  • the sensor arrangement has two such piezoelectric sensors in order to carry out a redundancy measurement.
  • the actuator allows movement of the workpiece interface and / or of the workpiece in the direction of a rotation axis (ie in the Z direction) and perpendicular to the rotation axis in the direction of the workpiece (ie in the X direction). In this way, any vibration on the workpiece interface or the workpiece can be applied to the rotating workpiece.
  • the actuator may be formed, for example, as a ring actuator or as a disk actuator. It is particularly preferred that this is also designed as a piezoelectric actuator to allow a fast response and / or frequency in the control by the control device.
  • Another object of the invention is a machine tool as described above with a tool for machining a tool.
  • the machine tool has the clamping device arrangement, as described above.
  • Another optional object of the invention is a method for compensating for vibrations on a tool with the clamping device assembly and / or the machine tool, as described above.
  • vibrations of the tool are recorded as sensor data and compensated by triggering the actuator with countervibrations, so that the vibrations at the machining zone between the workpiece and the tool are reduced and preferably extinguished.
  • Figure 1 is a schematic representation of a machine tool with a clamping device arrangement as an embodiment of the invention
  • Figure 2 shows a basic structure of a feedforward control, as this can be used in the clamping device arrangement.
  • 1 shows a highly schematic diagram of a machine tool 1 with a tool 2 for machining a workpiece 3 as an embodiment of the invention.
  • the workpiece 3 is rotated during machining about a rotation axis R, which runs parallel to a Z-direction in a coordinate system KO of the machine tool 1.
  • a coordinate system KO In the side view shown, in the coordinate system KO, an X direction is perpendicular to the Z direction. In particular, the XZ plane is shown.
  • the tool 2 may be formed, for example, as a drilling, milling, turning or broaching tool.
  • the tool 2 is realized as a turning tool.
  • the tool 2 has a tool holder 14, which has a shank and a head, wherein an indexable insert is arranged as a cutting body 17 on the head.
  • the machine tool 1 has a clamping means arrangement 4, which is constructed from a clamping means 5 of a sensor arrangement 6 and a control device 7.
  • the clamping means 5 has as a workpiece interface 8 a chuck, in particular lathe chuck, wherein the workpiece 3 is received in the workpiece interface and is clamped in particular in the clamping or lathe chuck.
  • a machine interface 9 is arranged, with which the clamping means 5 with the machine tool 1, in particular a rotation axis or spindle axis of the machine tool 1 can be connected.
  • the machine interface 9 is designed as a standard interface.
  • the machine interface 9 is designed as a quick-change closure in the form of a bayonet closure.
  • an actuator 10 is integrated, which makes it possible to move the workpiece interface 8 and thus the workpiece 3 in the Z direction and additionally in the X direction or tilt. Taking into account that the workpiece 3 is offset during machining in rotation about the rotation axis R together with the clamping means 5, so can be deflected by the actuator 10, the workpiece 3 in any direction perpendicular to the rotation axis R. However, it is also possible that another actuator 10 is used.
  • the actuator 10 is over a cable 1 1 signal-coupled with the control device 7.
  • a rotary feedthrough 12 for the signal transmission and for the power supply between the control device 7 and the actuator 10 is provided.
  • the sensor arrangement 6 has two sensors 13 a, b, which are arranged on the tool holder 14 of the tool 2.
  • One of the sensors 13 a is attached to the shaft of the tool holder 14, the other sensor 13 b is disposed on the head of the tool holder 14, immediately adjacent to the blade body 17.
  • Both sensors 13a, b are designed as vibration sensors and in particular according to a piezoelectric operating principle.
  • the sensors 13a, b or, more generally, the sensor arrangement 6 are signal-connected to the control device 7.
  • the clamping means 5 has decoupling modules 16 which are provided for decoupling the machine tool 1 from the clamping means 5 and in particular from counter vibrations of the actuator 10.
  • the clamping means 5 is designed as a fully encapsulated system that can be universally adapted to each machine tool 1.
  • vibrations may occur during machining.
  • the sensors 13a, b as vibration sensors according to the piezoelectric operating principle on the tool 2 or on the tool holder 14, wherein the two sensors 13a, b represent a redundant system.
  • the detected vibrations are processed as sensor data in the control device 7 via the axial position of the machine tool 1 in real time and control signals via an interface, in this case the cable 1 1, the actuator 10, which is integrated in the clamping means 5, fed, which is converted into negative vibrations are to extinguish in this way in the machining zone between the tool 2 and the workpiece 3, the vibrations.
  • This type of vibration compensation can be implemented, for example, by a feedforward control whose structure is shown in FIG.
  • a primary interference PM is impressed on the tool 2 as the primary path by the machining, which can lead to vibrations in the processing zone B.
  • the compensation takes place via a secondary path, which is formed by the active clamping means 5 and the workpiece 3, which generate a countervibration.
  • a reference signal RS is received and supplied to the control device 7, which is designed as a controller, in particular as an adaptive filter.
  • the control device 7 calculates a control signal, which is supplied to the active clamping means 5, so that the counter-vibrations are generated on the workpiece 3.
  • oscillations in the primary track and the countervibrations in the secondary track are said to result in mutual cancellation at the machining zone B. It may be provided that, in addition, an error signal FS is recorded over the sensor arrangement 6 in order to adapt the control device 7, in particular the controller.
  • a clamping means 5 is thus proposed, which is universally applicable to all machine tools and has an active, integrated vibration damping, so that the clamping means 5 absorb labile, slightly oscillating workpieces as usual and can counteract the vibrations occurring during processing.
  • the advantage is the increase in component quality and / or the reduction of cycle times and the reduction of tool costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Control Of Machine Tools (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

L'invention concerne un ensemble de moyen de serrage (4) pour une machine-outil (1), la machine-outil (1) comprenant un outil (2) pour l'usinage d'une pièce à usiner (3), un moyen de serrage (5), le moyen de serrage (5) comprenant une interface machine (9) pour le couplage à la machine-outil (1) et une interface pièce (8) pour la réception de la pièce à usiner (3), un ensemble de capteurs (6), l'ensemble de capteurs (6) étant conçu pour enregistrer des vibrations de l'outil (2) en tant que données de capteur, un dispositif de commande (7) pour l'enregistrement des données de capteur de l'ensemble de capteurs (6), le moyen de serrage (5) comprenant au moins un actionneur (10) disposé sur le moyen de serrage (5), le dispositif de commande (7) étant conçu pour commander l'au moins un actionneur (10) sur la base des données de capteur afin de compenser les vibrations de l'outil (2).
EP18714427.4A 2017-03-13 2018-03-01 Ensemble de moyen de serrage pour une machine-outil ainsi que machine-outil avec l'ensemble de moyens de serrage Ceased EP3595844A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017105257.7A DE102017105257A1 (de) 2017-03-13 2017-03-13 Spannmittelanordnung für eine Werkzeugmaschine sowie Werkzeugmaschine mit der Spannmittelanordnung
PCT/DE2018/100178 WO2018166557A1 (fr) 2017-03-13 2018-03-01 Ensemble de moyen de serrage pour une machine-outil ainsi que machine-outil avec l'ensemble de moyens de serrage

Publications (1)

Publication Number Publication Date
EP3595844A1 true EP3595844A1 (fr) 2020-01-22

Family

ID=61832227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18714427.4A Ceased EP3595844A1 (fr) 2017-03-13 2018-03-01 Ensemble de moyen de serrage pour une machine-outil ainsi que machine-outil avec l'ensemble de moyens de serrage

Country Status (4)

Country Link
EP (1) EP3595844A1 (fr)
CN (1) CN110382163A (fr)
DE (1) DE102017105257A1 (fr)
WO (1) WO2018166557A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113510503B (zh) * 2021-07-28 2022-06-03 安庆皖台精密机械有限公司 一种用于精密机床生产加工用的固定机构

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5816122A (en) * 1996-04-30 1998-10-06 General Dynamics Advanced Technology Systems, Inc. Apparatus and method for adaptive suppression of vibrations in mechanical systems
US6241435B1 (en) * 1998-03-25 2001-06-05 Vought Aircraft Industries, Inc. Universal adaptive machining chatter control fixture
SE519487C2 (sv) * 1998-10-22 2003-03-04 Rolf Zimmergren Metod och anordning för vibrationsstyrning vid borrande svarvning samt verktygshållare för borrande svarvning
DE19859360C2 (de) 1998-12-22 2003-07-17 Schwaebische Werkzeugmaschinen Werkzeugmaschine mit piezoelektrischer Positionskorrektureinrichtung
DE10340697A1 (de) * 2003-03-26 2004-10-07 GFE-Gesellschaft für Fertigungstechnik und Entwicklung Schmalkalden/Chemnitz mbH Einrichtung zum Erfassen, Bewerten und Verändern des dynamischen Verhaltens von Rotierenden Zerspanungswerkzeugen
DE102005057175B4 (de) * 2005-11-30 2009-03-26 Siemens Ag Verfahren zur Reduktion von Schwingungen eines Maschinenelements und/oder eines Werkstücks
DE102006049867B4 (de) * 2006-10-23 2021-09-16 Siemens Aktiengesellschaft Werkzeugmaschine und Verfahren zur Unterdrückung von Ratterschwingungen
DE102007050911A1 (de) 2007-10-23 2009-04-30 Eras Entwicklung Und Realisation Adaptiver Systeme Gmbh Verfahren und Vorrichtung zum Unterdrücken des Ratterns von Arbeitswalzen eines Walzgerüsts
ES2425925T3 (es) * 2011-03-04 2013-10-18 Mikron Agie Charmilles Ag Máquina de herramienta con una mesa portapieza
CN103978240B (zh) * 2014-04-28 2016-08-17 河南航天液压气动技术有限公司 机床夹具及使用该机床夹具的机床

Also Published As

Publication number Publication date
DE102017105257A1 (de) 2018-09-13
CN110382163A (zh) 2019-10-25
WO2018166557A1 (fr) 2018-09-20

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