WO2008031463A1 - Tête de polissage - Google Patents

Tête de polissage Download PDF

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Publication number
WO2008031463A1
WO2008031463A1 PCT/EP2006/070203 EP2006070203W WO2008031463A1 WO 2008031463 A1 WO2008031463 A1 WO 2008031463A1 EP 2006070203 W EP2006070203 W EP 2006070203W WO 2008031463 A1 WO2008031463 A1 WO 2008031463A1
Authority
WO
WIPO (PCT)
Prior art keywords
polishing head
head according
tool
holding shafts
distance
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/EP2006/070203
Other languages
English (en)
Inventor
Mario Corradini
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.)
Ancora SpA
Original Assignee
Ancora SpA
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 Ancora SpA filed Critical Ancora SpA
Publication of WO2008031463A1 publication Critical patent/WO2008031463A1/fr
Anticipated expiration legal-status Critical
Ceased 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

Definitions

  • the invention relates to a polishing head, in particular a polishing head for stone materials.
  • Polishing heads are known that are used for polishing surfaces of stone material with the assistance of water, in particular slabs or tiles for floors or walls made of ceramics, marble, gres, granite and various forms of stone.
  • the polishing heads are mounted singularly or in groups on an operating machine.
  • Each polishing head comprises a shaft positioned centrally, provided at a first end with a flange, through which a rotational movement is taken from a motor associated with the operating machine.
  • the shaft is rotatably and coaxially connected to a casing element that is fixed to the operating machine and which has a greater diameter than the diameter of the shaft.
  • a cylindrical portion that projects to a second end of the shaft opposite the first end is internally fixed to the casing element. Inside the cylindrical portion the shaft is rotatably supported by means of bearings.
  • a further casing element comprising a circular base, that is rotated by the shaft during operation.
  • the circular base is provided peripherally with a cylindrical wall that projects to the casing element so as to define a closed volume inside the polishing head.
  • a first gearwheel provided externally with a first toothing and arranged coaxially to the shaft.
  • the first gearwheel is fixed by means of the cylindrical portion to the casing element .
  • a second gearwheel arranged coaxially to the shaft and having an external diameter that is greater than the first gearwheel.
  • the second gearwheel is fixed to the cylindrical portion in such a way as to be further away from the circular base with respect to the first wheel.
  • the second gearwheel is provided peripherally with a peripheral annular portion projecting to the circular base. On the annular portion a second toothing facing the shaft is obtained internally.
  • the polishing head is provided with a plurality of tool- holding shafts for grinding wheels, which shafts are rotatably connected and arranged transversely to the circular base, in such a way as to be able to be rotated by the latter around a central axis of the shaft.
  • the plurality of tool-holding shafts for grinding wheels is positioned in such a way as to have first ends arranged inside the polishing head and second ends, opposite the first ends, and positioned outside the polishing head for supporting grinding wheels.
  • the plurality of tool-holding shafts for grinding wheels comprises first tool-holding shafts, for first grinding wheels, and second tool-holding shafts for second grinding wheels.
  • the first tool-holding shafts and the second tool- holding shafts are arranged together in an alternating manner, are uniformly distributed along a peripheral zone of the circular base and have respectively first rotation axes and second rotation axes arranged parallel to the shaft.
  • the first rotation axes and the second rotation axes are arranged at the same distance from the shaft.
  • the first tool-holding shafts are provided at the first ends with first pinions that engage with the first gearwheel in such a way that during operation, the first tool-holding shafts rotate around the first rotation axes at a preset angular speed and in a first rotating direction that corresponds to a rotating direction of the shaft.
  • the second tool-holding shafts are provided at the first ends with second pinions that engage with the second gearwheel in such a way that during operation, the second tool-holding shafts rotate at the preset angular speed but in a second rotating direction opposite the first rotating direction .
  • the first tool-holding shafts and the second tool-holding shafts rotate respectively around the first axes and the second axes and at the same time rotate around the central axis of the shaft.
  • the first grinding wheels as they rotate in a direction that corresponds to the rotating direction of the shaft, have peripheral zones that are further from the central axis that move at a greater cutting speed than further peripheral zones of the second grinding wheels that are further from the central axis, the second grinding wheels rotating in the opposite direction to the shaft.
  • An object of the invention is to improve the polishing heads, particularly for stone materials.
  • polishing head for which suitable operating parameters are defined that are such as to make the cutting speeds of the first grinding heads and of the second grinding heads more homogenous. This enables polishing to be improved and a more careful and homogenous surface finish to be obtained.
  • a polishing head comprising first tool-holding shafts rotating in a first rotating direction and associated with first transmission means, and second tool-holding shafts rotating in a second rotating direction opposite said first rotating direction and associated with second transmission means, characterised in that said first transmission means and said second transmission means are such that said first tool- holding shafts and said second tool-holding shafts have cutting speeds that are not too different from one another as absolute values.
  • a polishing head that enables surfaces of stone materials to be polished evenly.
  • the first transmission means and the second transmission means are associated respectively with suitably selected first transmission ratios and second transmission ratios.
  • the first tool-holding shafts and the second tool-holding shafts are distant from a central longitudinal axis of the polishing head respectively by a first amount and by a second amount that are suitably preset.
  • abrasive surfaces associated with the first tool-holding shafts, and further abrasive surfaces associated with the second tool-holding shafts act on the surfaces to be machined at substantially the same cutting speeds.
  • the differences in peripheral speed are considerably reduced that are generated between zones of the abrasive surfaces and further zones of the further abrasive surfaces that are further from the longitudinal central axis.
  • Figure 1 is a perspective view of a polishing head.
  • Figure 2 is a schematic view that shows the operation of the polishing head in Figure 1.
  • Figure 3 is a section view taken along a through plane III- III passing through a longitudinal axis of the polishing head in Figure 1.
  • Figures 1 to 3 show a polishing head 1 that is suitable for polishing surfaces of stone material, such as slabs or tiles for floors or walls for example, of ceramic, marble, gres, granite, and various types of stone.
  • the polishing head 1 comprises shaft means 2 that extends along a central longitudinal axis A and is rotatably connected to a casing element 3 that is fixed firmly to an operating machine (not shown) .
  • the shaft means 2 is rotatably housed through bearings 12 inside a cylindrical portion 10 that is fixed to the casing element 3.
  • a flange 4 is fixed by means of which a rotational movement supplied by a motor of the operating machine is transferred to the shaft means 2.
  • a further casing element 32 comprising a base 11 of cylindrical shape.
  • a cylindrical wall 13 Peripherally to the base 11 there is provided a cylindrical wall 13 that projects towards the casing element 3 in such a way as to define volume that is closed above by an upper circular portion 14 arranged transversely to the shaft means 2 and immediately below the casing element 3.
  • the upper circular portion 14 prevents, by means of sealing elements 31 and gaskets 33, undesired objects from entering inside the polishing head 1.
  • housing cavities 8 arranged peripherally at regular intervals in such a way as to house rotatably, through further bearings 15, in an alternating manner, first tool- holding shafts 9 and second tool-holding shafts 20.
  • the polishing head shown in Figures 1 to 3 is provided with five first tool-holding shafts 9 and with five second tool- holding shafts 20, but it is possible to provide another desired number of first tool-holding shafts 9 and of second tool-holding shafts 20.
  • the first grinding wheels 60 and the second grinding wheels 61 are provided with abrasive surfaces 25 that are able to polish the surfaces to be treated.
  • the first tool-holding shafts 9 and the second tool-holding shafts 20 comprise respectively stem portions 62, having first rotation axes X, and further stem portions 63, having second rotation axes Y, extending parallel to the central longitudinal axis A.
  • the stem portions 62 are rotatable around first rotation axes X
  • the further stem portions 63 are rotatable around the second rotation axes Y.
  • the first rotation axes X are positioned at a first distance Rl from the central longitudinal axis A
  • the second rotation axes Y are positioned at a second distance R2 from the central longitudinal axis A.
  • the first grinding wheels 60 and the second grinding wheels 61 can be mounted in such a way as to have longitudinal axes slightly tilted by an angle E with respect to the first rotation axes X and to the second rotation axes Y. In this way, when the first tool-holding shafts 9 and the second tool-holding shafts 20 rotate respectively around the first rotation axes X and the second rotation axes Y the planes of the abrasive surfaces 25 are varied continuously in such a way as to adapt better to the surface roughnesses that are treated.
  • the polishing head 1 comprises first transmission means 50, associated with the first tool-holding shafts 9, and second transmission means 51, associated with the second tool- holding shafts 20.
  • the first transmission means 50 comprises a first gearwheel 26, having a first external radius F, arranged coaxially to the shaft means 2 and fixed to the cylindrical portion 10 by means of screws 64.
  • the first gearwheel 26 is provided peripherally and externally with a first toothing 27.
  • the first transmission means 50 comprises first pinions 21, having a second external radius C, that are fixed to upper connecting ends 17 of the first tool-holding shafts 9.
  • the first pinions 21 are externally and circumferally provided with further first toothings 22 that engage with the first toothing 26.
  • a first transmission ratio Zl i.e. a first ratio between a first number of teeth Nl provided on the first gearwheel 26 and a second number of teeth N2 provided on each first pinion 21.
  • the second transmission means 51 comprises a support ring 29 of a second gearwheel 30, arranged coaxially with respect to the shaft means 2 and fixed to the cylindrical portion 10 by further screws 65.
  • the second gearwheel 30 is provided in the interior thereof with a second internal toothing 28 arranged along a circumference coaxial to the central longitudinal axis A.
  • the second toothing 28 has an internal radius G that is greater than the second distance R2.
  • the second transmission means 51 comprises second pinions 18, having a third external radius D, that are fixed to further upper connecting ends 34 of the second tool-holding shafts 20, in such a way as to be further from the base 11 than are the first pinions 21.
  • the second pinions 18 are provided externally and circumferally with further second toothings 19 that engage with the second toothing 28.
  • a second transmission ratio Z2 i.e. a second ratio between a third number of teeth N3 provided on the second gearwheel 30 and a fourth number of teeth N4 provided on each second pinion 18.
  • the base 11 which is rotated in a first direction L by the shaft means 2, drags with it the first tool-holding shafts 9 and the second tool-holding shafts 20 that travel along a revolution trajectory around the central longitudinal axis A.
  • the first toothing 27, which is fixed interacts with the further first toothings 22 in such a way that the first pinions 21 rotate in a direction corresponding to the first direction L around the first rotation axes X. In this way the first grinding wheels 60 rotate around the first rotation axes X and at a first angular speed Wl .
  • the second grinding wheels 61 rotate around the second rotation axes Y at a second angular speed W2.
  • the first cutting speed VtI is generated by the algebraic sum of a first speed contribution equal to 3.96m/s provided by the rotation of the first grinding wheels 60 around the first rotation axes X and a second speed contribution equal to 5.05m/s, provided by the rotation of the first grinding wheels 60 around the central longitudinal axis A.
  • the second cutting speed Vt2 is generated by the algebraic sum of a further first speed contribution equal to 13.74m/s provided by the rotation of the second grinding wheels 61 around the second rotation axes Y, and a further second speed contribution equal to 5.11m/s, provided by the rotation of the second grinding wheels 61 around the central longitudinal axis A.
  • the first cutting speed VtI is generated by the algebraic sum of a further first speed contribution equal to 5.24m/s provided by the rotation of the first grinding wheels 60 around the first rotation axes X, and a further second speed contribution equal to 6.687m/s, provided by the rotation of the first grinding wheels 60 around the central longitudinal axis A.
  • a second cutting speed Vt2 ll .43m/s .
  • the second cutting speed Vt2 is generated by the algebraic sum of a still further first speed contribution equal to 18.20m/s provided by the rotation of the second grinding wheels 61 around the second rotation axes Y, and a still further second speed contribution equal to 6.77m/s, provided by the rotation of the second grinding wheels 61 around the central longitudinal axis A.
  • VtI and Vt2 in the first example and in the second example disclosed above, differ from one another by less than 5%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

L'invention concerne une tête de polissage comprenant des premiers axes porte-outils (9) tournant dans un premier sens de rotation (M), et associés à des premiers moyens de transmission (21, 26, 50) et des seconds axes porte-outils (20) tournant dans un second sens de rotation (M) opposée au premier sens de rotation (L) et associés à de seconds moyens de transmission (18, 30, 51), lesdits premiers moyens de transmission (21, 26, 50) et seconde moyens de transmission (18, 30, 51) étant conçus de telle manière que lesdits premiers axes porte-outils (9) et lesdits seconds axes porte-outils (20) présentent des vitesses de coupe ne présentant par de différences trop importantes les unes des autres en valeur absolue.
PCT/EP2006/070203 2006-09-14 2006-12-22 Tête de polissage Ceased WO2008031463A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000282A ITMO20060282A1 (it) 2006-09-14 2006-09-14 Testa levigatrice
ITMO2006A000282 2006-09-14

Publications (1)

Publication Number Publication Date
WO2008031463A1 true WO2008031463A1 (fr) 2008-03-20

Family

ID=37989011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/070203 Ceased WO2008031463A1 (fr) 2006-09-14 2006-12-22 Tête de polissage

Country Status (2)

Country Link
IT (1) ITMO20060282A1 (fr)
WO (1) WO2008031463A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010119466A1 (fr) * 2009-04-17 2010-10-21 Co.Me.S. S.R.L. Machine pour le travail de la surface de produits en céramique
EP2777874A1 (fr) * 2013-03-11 2014-09-17 Steen Glerup Pedersen Machine de meulage de surface à commande manuelle
ITTV20130148A1 (it) * 2013-09-24 2015-03-25 Breton Spa Testa satellitare di levigatura per materiali lapidei naturali, agglomerati e ceramici.
IT201900005792A1 (it) 2019-04-15 2020-10-15 Ancora Spa Testa di trattamento di elementi lastriformi
IT201900018914A1 (it) 2019-10-15 2021-04-15 Ancora Spa Impianto di lavorazione di manufatti od oggetti ceramici o pietre naturali

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1108781A (fr) * 1954-06-30 1956-01-17 Machine de dressage par pression et polissage de surfaces en matières dures
FR2073627A5 (fr) * 1969-12-12 1971-10-01 Lazzari Giosue
WO2001070458A1 (fr) * 2000-03-21 2001-09-27 Nuove Officine Ancora S.P.A. Systeme de polissage pour produits en ceramique
RU2220039C2 (ru) * 2002-02-28 2003-12-27 Институт технологических наук и проблем реструктурирования в промышленности Устройство для абразивной обработки плоских поверхностей

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1108781A (fr) * 1954-06-30 1956-01-17 Machine de dressage par pression et polissage de surfaces en matières dures
FR2073627A5 (fr) * 1969-12-12 1971-10-01 Lazzari Giosue
WO2001070458A1 (fr) * 2000-03-21 2001-09-27 Nuove Officine Ancora S.P.A. Systeme de polissage pour produits en ceramique
RU2220039C2 (ru) * 2002-02-28 2003-12-27 Институт технологических наук и проблем реструктурирования в промышленности Устройство для абразивной обработки плоских поверхностей

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010119466A1 (fr) * 2009-04-17 2010-10-21 Co.Me.S. S.R.L. Machine pour le travail de la surface de produits en céramique
EP2777874A1 (fr) * 2013-03-11 2014-09-17 Steen Glerup Pedersen Machine de meulage de surface à commande manuelle
ITTV20130148A1 (it) * 2013-09-24 2015-03-25 Breton Spa Testa satellitare di levigatura per materiali lapidei naturali, agglomerati e ceramici.
WO2015044845A1 (fr) * 2013-09-24 2015-04-02 Breton Spa Tête de rubanage orbitale pour pierre naturelle, aggloméré et matériaux en céramique
CN105555472A (zh) * 2013-09-24 2016-05-04 百利通有限公司 用于天然石材、团块材料和陶瓷材料的轨道研磨头
IT201900005792A1 (it) 2019-04-15 2020-10-15 Ancora Spa Testa di trattamento di elementi lastriformi
IT201900018914A1 (it) 2019-10-15 2021-04-15 Ancora Spa Impianto di lavorazione di manufatti od oggetti ceramici o pietre naturali

Also Published As

Publication number Publication date
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