EP3856458A1 - Tête d'actionnement dotée d'électro-broches - Google Patents

Tête d'actionnement dotée d'électro-broches

Info

Publication number
EP3856458A1
EP3856458A1 EP19787480.3A EP19787480A EP3856458A1 EP 3856458 A1 EP3856458 A1 EP 3856458A1 EP 19787480 A EP19787480 A EP 19787480A EP 3856458 A1 EP3856458 A1 EP 3856458A1
Authority
EP
European Patent Office
Prior art keywords
electro
operating head
central structure
rotor
spindles
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.)
Pending
Application number
EP19787480.3A
Other languages
German (de)
English (en)
Inventor
Giovanni Tupini
Rosario LO PICCOLO
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3856458A1 publication Critical patent/EP3856458A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/06—Bonded 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.
  • the present invention refers to machines and devices designed for smoothing and polishing surfaces of inorganic material, for example, stone, ceramic, porcelain, glass.
  • the present invention relates to operating heads to work on flat surfaces provided with oscillating abrasive blocks or rotary tool holding spindles connected to synchronous motors with permanent magnets, balancing mechanisms.
  • 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.
  • the horizontal shafts are driven from the spindle via internal ring gear, spur gear keyed to the spindle, spur gear rotatable on the spindle, bevel gear rotatable on and flexibly mounted on the spindle, and bevel gears on the shafts.
  • the grinding tools therefore have a motion consisting of rotation about their own areas and rotation bodily about the central axis.
  • US patent 8,534,274 B2 regarding a method and a plant provided for calibrating surfaces of stone materials, suitable for working at least one slab composed of an entry side and an exit side and of two parallel side edges; the slab is pushed along the side edges through a conveyor belt and is subjected to the cutting action imparted by multiple tools equipped with a peripheral speed compatible with optimum cutting parameters for the stone material; the tools move along a predefined path along the surface of the slab, and the motion imparted by the conveyor belt and the predefined tool path is combined in order to completely cover the surface of the slab; the contact between the slab and the tools is ensured simultaneously at least in one point on each of the two side edges of the slab.
  • 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.
  • FIG. 1 shows a perspective view of an embodiment of the operating head with electro spindles according to the present invention
  • FIG. 2 shows the previous figure without the upper part of the operating head with electro spindles
  • FIG. 3 shows a section along the vertical plane passing through the axis of rotation of the previous figure.
  • 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.

Landscapes

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

Abstract

L'invention concerne une tête d'actionnement dotée d'électro-broches, comprenant une structure centrale (10) tournant orthogonalement à un plan de travail, apte à soutenir une pluralité d'électro-broches réparties sur une circonférence avec la même distance angulaire, l'axe de rotation de chaque électro-broche étant disposé radialement par rapport à l'axe de rotation de la structure centrale (10). La structure centrale (10) comprend une tourelle prismatique sensiblement polygonale agencée sur chaque face latérale d'un siège à bride (11) conçu pour recevoir et soutenir un boîtier cylindrique (12) de chaque électro-broche.
EP19787480.3A 2018-09-24 2019-09-23 Tête d'actionnement dotée d'électro-broches Pending EP3856458A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800008847 2018-09-24
PCT/IT2019/050207 WO2020065689A1 (fr) 2018-09-24 2019-09-23 Tête d'actionnement dotée d'électro-broches

Publications (1)

Publication Number Publication Date
EP3856458A1 true EP3856458A1 (fr) 2021-08-04

Family

ID=64607137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19787480.3A Pending EP3856458A1 (fr) 2018-09-24 2019-09-23 Tête d'actionnement dotée d'électro-broches

Country Status (2)

Country Link
EP (1) EP3856458A1 (fr)
WO (1) WO2020065689A1 (fr)

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 (fr) 2021-04-01 2022-10-05 Meggiorin, Andrea Un rouleau amélioré

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 (fr) 2009-03-26 2010-09-29 Mbd S.R.L. Joint pour transmettre et distribuer l'alimentation électrique, signaux électriques, ou plusieurs fluides pressurisés, particulièrement adapté aux machines pour étalonner et lisser des matériaux à base de pierre
EP2255924A1 (fr) 2009-05-29 2010-12-01 Mbd S.R.L. Procédé d'étalonnage de surfaces de matériau de pierre
DE102011076837A1 (de) * 2011-05-31 2012-12-06 Gildemeister Italiana S.P.A. Werkzeugmaschine

Also Published As

Publication number Publication date
WO2020065689A1 (fr) 2020-04-02

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