EP3216563B1 - Meule boisseau pour bords de brame - Google Patents

Meule boisseau pour bords de brame Download PDF

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Publication number
EP3216563B1
EP3216563B1 EP17155694.7A EP17155694A EP3216563B1 EP 3216563 B1 EP3216563 B1 EP 3216563B1 EP 17155694 A EP17155694 A EP 17155694A EP 3216563 B1 EP3216563 B1 EP 3216563B1
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EP
European Patent Office
Prior art keywords
grinding wheel
cup grinding
abrasive
working
crown
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.)
Active
Application number
EP17155694.7A
Other languages
German (de)
English (en)
Other versions
EP3216563A1 (fr
Inventor
Domenico PRIVITERA
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.)
Up Tools Ltd
Original Assignee
Up Tools Ltd
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 Up Tools Ltd filed Critical Up Tools Ltd
Publication of EP3216563A1 publication Critical patent/EP3216563A1/fr
Application granted granted Critical
Publication of EP3216563B1 publication Critical patent/EP3216563B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with cooling provisions

Definitions

  • the present invention relates to a cup grinding wheel for working slab edges.
  • the field to which the invention relates is grinding, and in particular the forming of slab edges of stone materials, both natural and synthetic, of ceramic materials and of glassy materials.
  • Such working is carried out using diamond abrasive cup grinding wheels, with which a series of operations is carried out according to the final result that it is desired to obtain; such operations can be cutting, roughing, lapping, polishing and brightening.
  • cup grinding wheels are mounted on respective spindles, aligned in sequence on automatic rectilinear milling machines, capable of working on a single side or on two opposite sides simultaneously.
  • a cup grinding wheel A is generally constituted by a backing pad B, or wheel body, which is contoured so as to be installed on a spindle of a milling machine, and by a crown, or abrasive ring C, mounted on the backing pad and adapted to work in contact with an edge of a slab in order to confer the desired characteristics thereon.
  • Such abrasive annular body has a cylindrical lateral face D and a working front face E, the latter being the one that comes into contact with the edge of a slab to be worked.
  • the abrasive ring C can have a continuous shape as in Figure 1 , or it can be segmented G, like the abrasive ring F in Figure 2 , according to whether one wishes to obtain a working with better finishing capacities, as in the case of the continuous abrasive ring C, or with better cutting capacities, as in the case of the segmented abrasive ring G.
  • one or more passes are carried out on the edge of the slab to be worked, in the various working phases.
  • cup grinding wheels need to be used that have a continuous abrasive ring, for the reasons explained above, and such grinding wheels have cooling limitations, since the jet of coolant originating from the backing pad hardly succeeds in evenly cooling the entire body of the abrasive ring, and furthermore such jet is poorly distributed over the surface being worked; by contrast, grinding wheels with a segmented abrasive ring, used for roughing or cutting operations, are better cooled since the refrigerant liquid passes through the interspaces between the sectors, thus spreading out better and resulting in both a more even cooling of the cup grinding wheel and a better cleaning of the surface being worked.
  • a cup grinding wheel according to the preamble of claim 1 is disclosed in US 2014/0331838 A1 . However, this grinding wheel is applied for blade sharpening.
  • the aim of the present invention is to provide a cup grinding wheel for working slab edges that is capable of overcoming the above mentioned drawbacks of the known art.
  • an object of the invention is to provide a cup grinding wheel that is capable of limiting the working lines on the edge of the slab being worked.
  • Another object of the invention is to provide a cup grinding wheel that makes it possible to set up machines that are shorter overall with respect to conventional machines, i.e. that are capable of optimal performance levels with a smaller number of cup grinding wheels with respect to conventional machines.
  • Another object of the invention is to provide a cup grinding wheel that is capable of polishing operations and which at the same time can be optimally cooled.
  • a cup grinding wheel according to the invention is generally designated with the reference numeral 10.
  • the cup grinding wheel 10 comprises:
  • the peculiarity of the cup grinding wheel 10 according to the invention consists in that the abrasive annular body 12 comprises a continuous external abrasive crown 15 and a segmented internal abrasive crown 16.
  • the annular body 12 has an annular curvilinear channel 17 that extends on the front working face 14 so as to separate the continuous external abrasive crown 15 and the segmented internal abrasive crown 16.
  • the annular curvilinear channel 17 extends in depth starting from the front working face 14 in an axial direction X toward the backing pad 11, where X is the direction of the rotation axis of the cup grinding wheel 10.
  • the sectors of the segmented abrasive ring 16 are designated with the reference numerals 18, 19 and 20.
  • a sector 19 is separated from a laterally adjacent sector 18 and 20 by an interspace 21 and 22, which also extends in depth starting from the front working face 14 in an axial direction X toward the backing pad 11.
  • the curvilinear channel 17 extends on the working face 14 along a sinusoidal line Z with respect to a reference circumference Z1.
  • Such sinusoidal line Z is shown in Figure 5 with respect to the linear path of the reference circumference Z1, taking as a reference some significant points P1, P2, P3, P4, P5 of its trajectory, indicated in Figure 4 and shown in the same graph in Figure 5 .
  • the advancement direction of the slab 30 with respect to the cup grinding wheel 10 is indicated with the letter Y.
  • the cup grinding wheel 10 works on the face of the edge 31 being worked, alternating a predominantly cutting action when it is in contact with the segmented internal abrasive crown 16 and a predominantly finishing action when it is in contact with the continuous external abrasive crown 15.
  • the cup grinding wheel 10 according to the invention is optimally cooled in the manner of a conventional cup grinding wheel with a segmented abrasive crown, thus incorporating the finishing capability of cup grinding wheels with a continuous abrasive crown and the optimal cooling capability of cup grinding wheels with a segmented abrasive crown.
  • the cup grinding wheel 10 according to the invention by incorporating two tools in one, makes it possible to set up machines for working slab edges with fewer aligned spindles, and which are therefore shorter overall, with advantages in terms of cost and of space occupation.
  • the two abrasive crowns 15 and 16 can be provided with abrasive material of the same or different granulometries, according to the necessities and technical requirements.
  • the abrasive material in any case, should be understood as being of conventional type.
  • a cup grinding wheel has been devised that is capable of limiting the working lines on the edge of the slab being worked.
  • a cup grinding wheel has been devised that makes it possible to set up machines that are shorter overall with respect to conventional machines, i.e. that are capable of optimal performance levels with a smaller number of cup grinding wheels with respect to conventional machines.
  • cup grinding wheel has been devised that is capable of polishing operations and which at the same time can be optimally cooled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (4)

  1. Meule boisseau (10) pour usiner des bords de dalle, qui comporte :
    - une plaquette de support conformée (11) pour une fixation à une broche,
    - un corps annulaire abrasif (12), fixé à ladite plaquette de support conformée (11), avec une face latérale cylindrique (13) et une face d'usinage avant (14),
    ledit corps annulaire abrasif (12) comportant une couronne abrasive externe continue (15) et une couronne abrasive interne segmentée (16), caractérisée en ce que ledit corps annulaire abrasif (12) a un canal curviligne annulaire (17) qui s'étend sur la face d'usinage avant (14) de manière à séparer ladite couronne abrasive externe continue (15) et ladite couronne abrasive interne segmentée (16).
  2. Meule boisseau selon la revendication 1, caractérisée en ce que ledit canal curviligne annulaire (17) s'étend en profondeur en commençant à partir de la face d'usinage avant (14) dans une direction axiale (X) vers la plaquette de support (11), où la direction axiale (X) est la direction de l'axe de rotation de la meule boisseau (10).
  3. Meule boisseau selon une ou plusieurs des revendications précédentes, caractérisée en ce qu'un secteur (19) est séparé d'un secteur latéralement adjacent (18, 20) par un espacement (21, 22), qui s'étend également en profondeur en commençant à partir de la face d'usinage avant (14) dans une direction axiale (X) vers la plaquette de support (11).
  4. Meule boisseau selon une ou plusieurs des revendications précédentes, caractérisée en ce que ledit canal curviligne (17) s'étend sur la face d'usinage (14) le long d'une ligne sinusoïdale (Z) par rapport à une circonférence de référence (Z1).
EP17155694.7A 2016-02-12 2017-02-10 Meule boisseau pour bords de brame Active EP3216563B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB2016A000714A ITUB20160714A1 (it) 2016-02-12 2016-02-12 Mola a tazza per la lavorazione di bordi di lastre

Publications (2)

Publication Number Publication Date
EP3216563A1 EP3216563A1 (fr) 2017-09-13
EP3216563B1 true EP3216563B1 (fr) 2019-02-20

Family

ID=55969318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17155694.7A Active EP3216563B1 (fr) 2016-02-12 2017-02-10 Meule boisseau pour bords de brame

Country Status (2)

Country Link
EP (1) EP3216563B1 (fr)
IT (1) ITUB20160714A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7204318B2 (ja) * 2017-11-06 2023-01-16 株式会社ディスコ 研削ホイール
CN109093534B (zh) * 2018-09-11 2023-12-08 桂林创源金刚石有限公司 一种气动进给杯形砂轮、平行砂轮及磨盘

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE804762C (de) * 1948-10-02 1951-04-30 Krusius Geb Vorrichtung zum Schleifen der Klingen von Messern u. dgl.
US2649667A (en) * 1952-08-25 1953-08-25 American Optical Corp Abrading device
CH685930A5 (de) * 1992-09-16 1995-11-15 Revema Ag Fasenschleifkopf fur die Steinbearbeitung fur den Einsatz auf Kantenschleifmaschinen.
CA2948299A1 (fr) * 2013-05-09 2014-11-13 Lawrence Baker Systeme d'affutage de lame pour une machine de sciage de premier debit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ITUB20160714A1 (it) 2017-08-12
EP3216563A1 (fr) 2017-09-13

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