EP3856458B1 - Betätigungskopf mit elektrospindeln - Google Patents

Betätigungskopf mit elektrospindeln Download PDF

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Publication number
EP3856458B1
EP3856458B1 EP19787480.3A EP19787480A EP3856458B1 EP 3856458 B1 EP3856458 B1 EP 3856458B1 EP 19787480 A EP19787480 A EP 19787480A EP 3856458 B1 EP3856458 B1 EP 3856458B1
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EP
European Patent Office
Prior art keywords
rotor
electro
central structure
operating head
spindles
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EP19787480.3A
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English (en)
French (fr)
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EP3856458A1 (de
Inventor
Giovanni Tupini
Rosario LO PICCOLO
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Individual
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/04Headstocks; Working-spindles; Features relating thereto
    • B24B41/047Grinding heads for working on plane surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/0076Other grinding machines or devices grinding machines comprising two or more grinding tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00Drives or gearings; Equipment therefor
    • B24B47/10Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/12Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/06Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental

Definitions

  • the present invention relates to an operating head with electro spindles.
  • patent application DE 4 209 273 A1 concerning a grinding head connected to a machine by a flange with central hole and bearings for a driven vertical spindle.
  • Fixed to the bottom end of the spindle by resiliently bushed screws is housing in the form of an inverted bell with radial extensions.
  • the housing seals on a spherical thrust surface and can move slightly about a pivot point on the spindle centreline.
  • In the radial extensions are horizontal shafts which drive grinding rolls having an elastically backed outer layer of abrasive.
  • EP 2 234 213 A1 concerning a joint for transmitting and distributing electric and electronic power coupled with the transmission and distribution of hydraulic and pneumatic power, suitable for connecting two relatively-moving parts, belonging to a machine for working stone materials, wood or glass, comprising a rotary part with respect to a fixed part: the rotary part comprises a hollow cylinder for supporting apparatuses for transmitting and distributing electric power, electric signals, pneumatic power, hydraulic power.
  • EP 0 043 584 A1 discloses an operating head with electro spindles for processing workpieces.
  • patent US 8,534,274 B2 by means of a train of tool-holding spindles connected to a respective coaxial electric motor which operates independently from the other motors of the other shafts. In this way, without inner crown like that of the patent DE 4 209 273 A1 the disturbance of shocks and vibrations can not be transmitted to the train of spindles.
  • the patent US 8,534,274 B2 relates to a big head that is not suitable for the rectification of a slab, while it is preferred a head of contained dimensions capable of elastically adapt to the development of the slab.
  • a rigid structure ensures uniform thickness of a thick slab.
  • an operating head provided with a train of electric spindles of contained radial dimension.
  • Permanent magnet motors capable of delivering energy with a high power magnetic density collected in a resized volume can solve the problem.
  • an operating head with a train of electric spindles is equipped with a joint for the transmission and distribution of electrical energy, of the type described in the patent EP 2 234 213 A1 .
  • An advantage of the present invention is that of having an operating head with a plurality of drive spindles of reduced volume and at the same time with a high power of abrasion.
  • a further advantage is that of being able to provide a working head of reduced overall dimensions and high mechanical performance.
  • an operating head with electro spindles comprises a central structure 10 rotating orthogonally to a work plane.
  • the central structure 10 is able to support a plurality of electro spindles distributed on a circumference with the same angular distance, the axis of rotation of each electro spindle disposed radially with respect to the axis of rotation of the central structure.
  • the central structure 10 comprises a substantially polygonal prismatic turret provided on each side face of a flanged seat 11 adapted to receive and support a cylindrical casing 12 of each electro spindle.
  • the rotor and the stator of each electro spindle belongs to a synchronous motor with permanent magnets, the permanent magnets mounted on the rotor surface or inserted inside the rotor, the stator installed around the rotor with a space between the rotor and the stator, the coils wound around the stator, so that when the electric current is applied to the coil, the rotor is rotated by a force applied in a certain direction.
  • the central structure 10 allows housing inside of it a plurality of wirings for the transmission and distribution of electrical and electronic power.
  • the operating head with electro spindles comprises at least one pneumatic device 20 of vertical approach connected to the central structure 10 to balance a certain overall mass and maintain the operating head with electro spindles in a floating condition.
  • An operating head with electro spindles is adapted to replace an operating head according to the state of the art.
  • a known multi-spindle calibrating head comprising twenty electro spindles uniformly distributed on a circumference with a diameter equal to 1600 mm, in radial direction, each electro spindle of 1,7 kW
  • an operating head with electro spindles of the type according to the present invention, comprising six electro-spindles uniformly distributed on a circumference of diameter equal to 670 mm, in radial direction, each electro-spindle of about 6.0 kW, the overall dimensions of the 6 kW electro spindle being the same as the electro-spindle of 1,7 Kw, thanks to a downsizing, through the adoption of permanent magnet technology, with the same operating force and speed of the rotating shaft.
  • An operating head with six electric spindles arranged on a circumference with a diameter of 660 mm is suitable for working a slab of stone material moving on the curved surface of the slab. Therefore the electro spindle resizing allows adjusting the orientation of the calibrating head to the curvature of the slab to be processed. This aspect becomes important for slabs coming from traditional sawing, with wire and blades, compared to those coming from diamond sawing, more precise and flat but limited to small slabs, and in particular for slabs of agglomerated material.
  • the number of six motors constitutes in practice an optimum value for a covering of the working points.
  • the diamond wheels used with greater frequency are those with a diameter around 200 mm.
  • An operating head with electrical spindles according to the present invention is suitable for compensating for a mass by means of a feedback device with a pneumatic cylinder controlled by a pressure regulator.
  • a spindle with permanent magnets supplied by an inverter of 400 V, three phases, may have the following characteristics: nominal speed 3000 rpm; frequency, 250 Hz; 10 poles; maximum speed 4000 rpm; nominal torque, 16 Nm; maximum torque 30 Nm; current maximum torque 44, A; size 130X190X190; mass, 3, 5 kg; type of service, 51.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (1)

  1. Arbeitskopf mit Elektrospindeln, bestehend aus einer orthogonal zu einer Arbeitsebene rotierenden zentralen Struktur (10), wobei die zentrale Struktur (10) eine Vielzahl von Elektrospindeln trägt, die auf einem Umfang mit gleichem Winkelabstand verteilt sind, wobei die Rotationsachsen jeder Spindel zueinander gleich sind Elektrospindel, die radial in Bezug auf die Drehachse der zentralen Struktur (10) angeordnet ist, wobei die zentrale Struktur einen im Wesentlichen polygonalen prismatischen Revolverkopf umfasst, der an jeder Seitenfläche mit einem Flanschsitz (11) versehen ist, der dazu bestimmt ist, ein zylindrisches Gehäuse (12) aufzunehmen und zu stützen ) jeder Elektrospindel, wobei:
    - der Rotor und der Stator jeder Elektrospindel gehören zu einem Synchronmotor mit Permanentmagneten, wobei die Permanentmagnete auf der Rotoroberfläche montiert oder in den Rotor eingesetzt sind, der Stator um den Rotor herum installiert ist und zwischen Rotor und Stator ein Zwischenraum besteht, mit die um den Stator gewickelten Spulen, sodass der Rotor durch eine in eine bestimmte Richtung ausgeübte Kraft gedreht wird, wenn ein elektrischer Strom an die Spulen angelegt wird;
    - die zentrale Struktur (10) ermöglicht die Unterbringung mehrerer Leitungen für die Übertragung und Verteilung elektrischer und elektronischer Energie;
    - der Arbeitskopf umfasst mindestens eine pneumatische Vorrichtung (20) mit vertikalem Ansatz, die mit der zentralen Struktur (10) verbunden ist, um eine bestimmte Gesamtmasse auszugleichen und den Arbeitskopf mit Elektrospindeln in einem schwebenden Zustand zu halten.
EP19787480.3A 2018-09-24 2019-09-23 Betätigungskopf mit elektrospindeln Active EP3856458B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800008847 2018-09-24
PCT/IT2019/050207 WO2020065689A1 (en) 2018-09-24 2019-09-23 Operating head with electro spindles

Publications (2)

Publication Number Publication Date
EP3856458A1 EP3856458A1 (de) 2021-08-04
EP3856458B1 true EP3856458B1 (de) 2024-06-26

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Application Number Title Priority Date Filing Date
EP19787480.3A Active EP3856458B1 (de) 2018-09-24 2019-09-23 Betätigungskopf mit elektrospindeln

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EP (1) EP3856458B1 (de)
WO (1) WO2020065689A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000017206A1 (it) * 2020-07-15 2022-01-15 Premier S R L Gruppo abrasivo migliorato per lavorazioni di materiale ceramico e/o lapideo
EP4066997A1 (de) 2021-04-01 2022-10-05 Meggiorin, Andrea Eine verbesserte walze

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025638C2 (de) * 1980-07-07 1982-08-12 Fa. Gottlieb Gühring, 7470 Ebingen Rundschalttisch-Maschine
US4620359A (en) * 1983-11-14 1986-11-04 Charlton Associates Apparatus for manufacturing rigid computer memory disc substrates
IT1247188B (it) 1991-03-21 1994-12-12 Luca Toncelli Testa levigatrice per materiali lapidei
DE19800034C2 (de) * 1998-01-02 2001-03-22 Elb Schliff Werkzeugmaschinen Werkzeugmaschine für Bearbeitungswerkzeuge aus der Gruppe Schleifkörper und Fräser
FR2825940B1 (fr) * 2001-06-15 2003-12-05 Mach Outils Wirth & Gruffat Machine multiposte a transfert rotatif pour usinage de pieces
ITMO20020135A1 (it) 2002-05-20 2003-11-20 Luigi Pedrini Mandrino intrinsecamente equilibrato portante teste di calibratura, levigatura o lucidatura di materiali lapidei naturali e piastrelle ceram
EP2234213A1 (de) 2009-03-26 2010-09-29 Mbd S.R.L. Anschluss zur Übertragung und Verteilung von Strom, elektrischer Signale oder mehrerer mit Druck beaufschlagter Fluide, die insbesondere für Maschinen zum Kalibrieren und Glätten von Steinmaterialien eingerichtet ist
EP2255924A1 (de) 2009-05-29 2010-12-01 Mbd S.R.L. Verfahren zur Oberflächenkalibrierung von Steinmaterial
DE102011076837A1 (de) * 2011-05-31 2012-12-06 Gildemeister Italiana S.P.A. Werkzeugmaschine

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Publication number Publication date
EP3856458A1 (de) 2021-08-04
WO2020065689A1 (en) 2020-04-02

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