WO2000066320A1 - Machine-outil a accumulateur d'energie mecanique - Google Patents

Machine-outil a accumulateur d'energie mecanique Download PDF

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Publication number
WO2000066320A1
WO2000066320A1 PCT/EP2000/001358 EP0001358W WO0066320A1 WO 2000066320 A1 WO2000066320 A1 WO 2000066320A1 EP 0001358 W EP0001358 W EP 0001358W WO 0066320 A1 WO0066320 A1 WO 0066320A1
Authority
WO
WIPO (PCT)
Prior art keywords
energy
network
machine tool
axes
control unit
Prior art date
Application number
PCT/EP2000/001358
Other languages
German (de)
English (en)
Inventor
Rolf Kuppinger
Original Assignee
Stama Maschinenfabrik 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 Stama Maschinenfabrik Gmbh filed Critical Stama Maschinenfabrik Gmbh
Publication of WO2000066320A1 publication Critical patent/WO2000066320A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J15/00—Systems for storing electric energy
    • 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
    • B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
    • 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
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/56—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/60—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/62—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides
    • B23Q1/621—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides a single sliding pair followed perpendicularly by a single sliding pair
    • B23Q1/626—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides a single sliding pair followed perpendicularly by a single sliding pair followed perpendicularly by a single sliding pair
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads

Definitions

  • the present invention relates to a machine tool with a plurality of axes which can be controlled via a control unit and an energy center which provides energy for the operation of the axes from a network.
  • the invention further relates to a method for controlling such a machine tool.
  • Machine tools of the aforementioned type are generally known from the prior art.
  • the known machine tools generally have a device for clamping workpieces to be machined as well a further device for clamping a tool with which the workpiece is machined.
  • the tool and workpiece can be moved relative to one another in several axes, the mechanical displacement or turning units, by means of which this method is achieved, generally being referred to as the "axis".
  • Such a machine tool is a so-called traveling column machine, in which the tool is held in a spindle which can be moved relative to the workpiece which is clamped on a workpiece table via x, y and z displacement units.
  • Such machine tools generally have a CNC control that controls the three axes and the motor that rotates the spindle.
  • the individual displacement units and the spindle motor are usually operated with pulsed DC voltage, which is provided by an energy center from a three-phase AC voltage network.
  • UPS uninterruptible power supplies, which are known per se, can be provided both for the energy center and for the CNC control.
  • UPS uninterruptible power supplies
  • the energy center on the DC voltage side with an intermediate store for electrical energy which, like a UPS, which generally acts on the primary side, ensures constant supply of DC voltage for driving the axes. In this way it is prevented, for example, that several axes and the spindle motor collapse as a result of the excessive switch-on when the vehicle is started up simultaneously.
  • the intermediate store thus serves as a capacitor for smoothing the required DC voltage on the secondary side. This also applies to energy recovery in generator mode.
  • this object is achieved according to the invention in that a mechanical energy store is provided which supplies energy for an emergency supply to the axes in the event of a fault in the network.
  • the inventors of the present application have recognized that sufficient energy can be stored in a mechanical energy store, which can be converted into electrical energy in the event of a power failure and can be provided until an emergency routine has been processed, by means of which the individual axes are brought into a state can, in which there is no longer a risk that damage to the machine tool, a tool or a workpiece can be caused.
  • a mechanical energy store e.g. a flywheel or a spring accumulator can be used. In the event of a power failure, this mechanical energy store is triggered and generates the required energy in the form of AC voltage via a generator connected downstream, which is converted accordingly by the energy center.
  • This measure has the advantage that only one further module for the Control of another axis must be inserted, in this case for a memory axis.
  • the storage axis can then be programmed and controlled by the control itself, so that even existing machine tools can be retrofitted with the mechanical energy store without great effort.
  • the CNC control then branches into an emergency program in which the memory axis is first triggered and then an emergency routine is initiated, through which the other axes are moved in a defined manner.
  • the further axis comprises an essentially vertically arranged displacement unit, the carriage of which carries a weight, the mass of which determines the positional energy, and the motor of which generates electrical energy for the emergency supply in the payload braking mode.
  • the advantage here is that another CNC axis with slide, ball screw and servo motor can be used for mechanical energy storage.
  • a further displacement mechanism has to be provided, which is set up vertically and carries a weight on its slide, the mass of which determines the stored position energy.
  • the carriage In normal operation, the carriage is moved all the way up, so that maximum position energy is stored in the weight.
  • the storage axis is then driven so that the weight moves down, the mechanical energy released being converted directly into electrical energy via the servo motor, which is even available on the secondary side of the energy center. This energy can be used directly for the emergency supply of the other axes.
  • a great advantage of this arrangement in addition to the simple implementation of the mechanics and the control, is that the electrical energy generated from the mechanical position energy is immediately available, no conversion losses etc. are lost.
  • the stored mechanical position energy can thus be used very efficiently for the emergency supply of the other axes.
  • This energy is also constantly available for a certain period of time, which can be seen as an advantage over the flywheel and spring accumulator, both of which do not work constantly over the delivery time.
  • Another advantage is that the electrical energy can be generated specifically in the manner of an emergency braking, by variably programming the speed of the downward movement of the weight on the storage axis in such a way that the required energy is being generated.
  • an intermediate store for electrical energy in which electrical energy generated during the payload braking is at least partially temporarily stored.
  • a circuit for mains failure detection which reports a malfunction in the network to the control unit, and if the energy center comprises a switch which can be controlled via the control unit and via which the energy center can be disconnected from the network. In this way, it is possible to disconnect the energy center from the network before starting the emergency supply in order to prevent the electrical energy generated by the storage axis from flowing back into the network. This measure also ensures efficient use of the stored mechanical energy and thus extends the time available for the emergency routine.
  • a power failure is recognized by the fact that the secondary-side and / or the primary-side voltage is below a certain voltage level for a certain period of time. As soon as this condition has been met, the machine tool is either "galvanically" isolated from the network either electrically or via semiconductor switches and the emergency routine is triggered, even if the network recovers immediately thereafter. In this way it is prevented that the machine tool gets into undefined states due to stronger, longer-term fluctuations and disturbances in the network.
  • Figure 1 is a schematic side view of the new machine tool.
  • FIG. 2 shows a schematic illustration of the storage axis of the machine tool from FIG. 1;
  • FIG. 3 shows a block diagram of the control center of the machine tool from FIG. 1;
  • Fig. 1 denotes a machine tool which has a workpiece table 11 on which a workpiece 12 to be machined is clamped.
  • a tool 14 which is clamped in a spindle 15 which is rotatably mounted in a spindle head 16, is used to machine the workpiece 12.
  • the spindle head 16 is mounted on a z-displacement unit 17, which in turn can be moved on a y-displacement unit 18.
  • the y displacement unit 18 finally is arranged on an x-displacement unit 19.
  • a further displacement unit 20 can also be seen.
  • the further displacement unit 20 represents a storage axis 24 to be described in more detail.
  • the machine tool 10 further comprises a control center 25, from which lines 26, 27 go to the individual displacement units 17, 18, 19 and 20.
  • the control center 25 is also connected to a network 29, which in the present case is a three-phase AC network, via a network cable 28.
  • the storage axis 24 serves as a mechanical energy store 30, the positional energy of which can be converted into electrical energy at the request of the control center 25.
  • the storage axis 24 is shown schematically in FIG. 2 in a front view. It includes a conventional servo motor 31 which drives a ball screw 32 over which a carriage
  • the control center 35 first comprises a power module 37, which converts the voltage from the network 29, which is, for example, three-phase 400 VAC, into DC voltage, for example 560 VDC. This DC voltage is made available on a DC rail 38.
  • the power module 37 is connected to a UPS 39 so that it can continue to be supplied with control voltage in the event of a power failure. Power module 37 and UPS 39 together form an energy center 40.
  • the control center 25 further comprises a control unit 41 which comprises a programmable logic controller and permanently programmed machine routines.
  • a UPS 42 is also provided for the control unit 41.
  • a power failure detection 43 is also provided, which supplies a power failure to the control unit 41 on a line 44.
  • the control unit 41 switches a switch 46 in the power module 37 via a line 45, as a result of which the DC side of the power module 37 is isolated from the power supply 29 either galvanically or logically via semiconductor switches.
  • servo modules 47, 48, 49 and 50 are connected to the direct current rail 38, which have an x motor 51 for the x axis 21, a y motor 52 for the y axis 18, and a z motor 53 for the z axis.
  • a spindle module 54 is switched on via the one Spindle motor 55 is driven, which sets the spindle 15 in rotation.
  • the servo modules 47, 48, 49, 50, the power module 37 and the spindle module 54 are connected to the control unit 41 via a bus 57.
  • the control unit 41 controls the motors 51, 52, 53, 55 and 31 via this bus 57 in accordance with user-defined commands and / or permanently programmed routines.
  • an intermediate store 59 for electrical energy is also connected to the direct current rail 38, which serves to compensate for voltage fluctuations on the direct voltage side.
  • the network 49 is disconnected from the power module 37 via the line 45 and the switch 46.
  • the storage axis 24 is started via the bus 57 by moving the carriage 33 downward in FIG. 2.
  • the entire available energy, which is stored in the storage axis 24, can be specifically released in this way.
  • the maximum stored energy is calculated from the mass of the weight 36 and a travel path 61 which the weight 36 can cover from its upper stop to its lower stop.
  • Targeted control of the servo motor 31 generates just as much energy as the other axes 21, 22, 23 and the spindle motor 55 require. conditions to ensure that the tool 14 comes out of engagement with the workpiece 12 in the context of a then started emergency routine.
  • the servo motor 31 is operated in the payload braking mode so that it acts as a generator which is driven by the weight 36 moving downward.
  • the voltage generated in the process which corresponds to a fully rectified AC voltage, is smoothed by the buffer store 49, which also compensates for peak loads during the emergency routine.
  • the time available for the emergency routine in the event of a power failure can be up to eight seconds, which is a time period which is even sufficient to completely withdraw an engaged tap from the tool.
  • the machine tool stops in a defined manner and can be started again from here, the storage axis 24 then also being “loaded” again by the weight 36 being raised again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Numerical Control (AREA)

Abstract

L'invention concerne une machine-outil (10) comprenant plusieurs arbres (21, 22, 23), pouvant être commandés par une unité de commande, ainsi qu'une centrale d'énergie fournissant une énergie provenant d'un réseau (29), pour faire fonctionner les arbres (21, 22, 23). Cette machine-outil comprend en outre un accumulateur d'énergie mécanique (30) qui, en cas de défaillance dans le réseau (29), fournit de l'énergie afin d'assurer une alimentation de secours pour les arbres (21, 22, 23).
PCT/EP2000/001358 1999-04-30 2000-02-18 Machine-outil a accumulateur d'energie mecanique WO2000066320A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999119692 DE19919692A1 (de) 1999-04-30 1999-04-30 Werkzeugmaschine mit mechanischem Energiespeicher
DE19919692.3 1999-04-30

Publications (1)

Publication Number Publication Date
WO2000066320A1 true WO2000066320A1 (fr) 2000-11-09

Family

ID=7906412

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/001358 WO2000066320A1 (fr) 1999-04-30 2000-02-18 Machine-outil a accumulateur d'energie mecanique

Country Status (2)

Country Link
DE (1) DE19919692A1 (fr)
WO (1) WO2000066320A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004046836A1 (fr) * 2002-11-19 2004-06-03 Stama Maschinenfabrik Gmbh Machine-outil et son mode de fonctionnement
CN102205512A (zh) * 2010-03-29 2011-10-05 大隈株式会社 用于机床的控制装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000718A1 (de) * 2008-03-18 2009-09-24 Hiwin Mikrosystem Corp. Dreiachsige Plattform
CN102029522B (zh) * 2010-12-16 2012-07-18 北京科技大学 四轴四联动倒置式车铣复合加工装置
CN102126134B (zh) * 2011-04-11 2013-05-22 北京科技大学 五轴五联动倒置式车铣复合加工装置
DE102019001936A1 (de) 2019-03-20 2020-09-24 Günther Zimmer Energieversorgungssystem für ein Transport- und/oder Bearbeitungssystem

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE3142087A1 (de) * 1980-11-14 1982-07-08 VEB Werkzeugmaschinenkombinat "7. Oktober" Berlin, DDR 1120 Berlin "zwanglaufsteuerung an werkzeugmaschinen mit einer schaltungsanordnung zur schadensverhuetung"
FR2576818A1 (fr) * 1985-02-06 1986-08-08 Rectification Cylindrique Fse Dispositif de securite pour degagement rapide, notamment sur une machine-outil
DE4306307A1 (de) * 1993-03-01 1994-09-08 Siemens Ag Verfahren zur Schadensverhütung an numerisch gesteuerten Maschinen bei Netzausfall
DE4312912A1 (de) * 1993-04-10 1994-10-20 Priesemuth W Energiespeicher
DE29603668U1 (de) * 1996-02-28 1996-04-25 Liebherr-Verzahntechnik Gmbh, 87437 Kempten Verzahnmaschine
EP0757306A1 (fr) * 1995-02-21 1997-02-05 Fanuc Ltd Procede et dispositif de regulation lors d'une panne de courant
JPH1177484A (ja) * 1997-09-08 1999-03-23 Murata Mach Ltd Ｎｃ工作機械

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Publication number Priority date Publication date Assignee Title
AT373690B (de) * 1980-06-11 1984-02-10 Rieder Heinz Messgeraet, indsbesondere laengen- oder winkelmessgeraet
DE19745233B4 (de) * 1996-10-19 2006-02-16 Horkos Corp., Fukuyama Spindel-Halterungskasteneinrichtung für Werkzeugmaschinen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3142087A1 (de) * 1980-11-14 1982-07-08 VEB Werkzeugmaschinenkombinat "7. Oktober" Berlin, DDR 1120 Berlin "zwanglaufsteuerung an werkzeugmaschinen mit einer schaltungsanordnung zur schadensverhuetung"
FR2576818A1 (fr) * 1985-02-06 1986-08-08 Rectification Cylindrique Fse Dispositif de securite pour degagement rapide, notamment sur une machine-outil
DE4306307A1 (de) * 1993-03-01 1994-09-08 Siemens Ag Verfahren zur Schadensverhütung an numerisch gesteuerten Maschinen bei Netzausfall
DE4312912A1 (de) * 1993-04-10 1994-10-20 Priesemuth W Energiespeicher
EP0757306A1 (fr) * 1995-02-21 1997-02-05 Fanuc Ltd Procede et dispositif de regulation lors d'une panne de courant
DE29603668U1 (de) * 1996-02-28 1996-04-25 Liebherr-Verzahntechnik Gmbh, 87437 Kempten Verzahnmaschine
JPH1177484A (ja) * 1997-09-08 1999-03-23 Murata Mach Ltd Ｎｃ工作機械

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 08 30 June 1999 (1999-06-30) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004046836A1 (fr) * 2002-11-19 2004-06-03 Stama Maschinenfabrik Gmbh Machine-outil et son mode de fonctionnement
US7177720B2 (en) 2002-11-19 2007-02-13 Stama Maschinenfabrik Gmbh Machine tool and method for operating a machine tool
CN102205512A (zh) * 2010-03-29 2011-10-05 大隈株式会社 用于机床的控制装置
CN102205512B (zh) * 2010-03-29 2014-10-01 大隈株式会社 用于机床的控制装置
DE102011014951B4 (de) * 2010-03-29 2019-02-28 Okuma Corporation Steuervorrichtung für eine Werkzeugmaschine

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Publication number Publication date
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