EP1561534B1

EP1561534B1 - Diamond-tipped cutting disc

Info

Publication number: EP1561534B1
Application number: EP05002335A
Authority: EP
Inventors: Ruggero Garbin
Original assignee: PREMIER Srl
Current assignee: PREMIER Srl
Priority date: 2004-02-09
Filing date: 2005-02-04
Publication date: 2007-07-25
Anticipated expiration: 2025-02-04
Also published as: DE602005001707D1; ATE367879T1; EP1561534A1; ITVI20040018A1

Abstract

The finding concerns a diamond-tipped cutting disc, to be used for cutting or chamfering different products, from natural stones to ceramics, from granite and marble floor tiles to single fired products and from fine compact clinker bricks to hard porcelain stoneware. Such a disc consists of a central disc or core (2) made from steel, equipped with the hole (3) for the attachment to the machine tool and the diamond band or ring (4), arranged on the outside with respect to the first. Such as disc is characterised in that the diamond band has shaped ridges on a side wall or on both of the side walls, which constitute the abrasive surface of the tool. <IMAGE>

Description

The present finding concerns a diamond-tipped cutting disc, according to the general part of claim 1.
In the stone and ceramics industry cutting tools identified with the term "cutting discs" and used for cutting or chamfering different products, from natural stones to ceramics, from granite and marble floor tiles to single fired products and from fine compact clinker bricks to hard porcelain stoneware, are regularly used.
A cutting disc, for so-called "diamond" cutting, consists of two parts: a disc: defined with the term "core", made from steel, equipped with a central hole for adapting to the operating machine and a diamond band, defined with the term "ring", applied onto the outer circumference of the core, which constitutes the cutting member.
The diamond band is applied onto the steel core to form a single body, through different operations, from braze welding to the use of laser welding.
Cutting discs are split into two categories: continuous band or crown discs and sector discs, corresponding to the different configuration of the diamond band, respectively consisting of a single ring or of a plurality of radial plates, arranged on the outer circumference of the steel core and arranged more or less close together.
In the current state of the art cutting discs are designed and made that, suitably combining the constructive parameters of the tool such as the type of grain of the abrasive part, the diameter, the thickness and the height of the diamond band, aim to obtain the best possible yield in terms of material worked.
The document EP-A-0836903 can be cited as an example of the state of the art according to the preamble of claim 1.
The purpose of the present finding is that of making a diamond-tipped cutting disc that, during use, displays properties, such as greater resilience, elevated hardness, substantial abrasiveness and low wear, such as to make it, during use, highly innovative with respect to similar known products and very economically advantageous.
Such a purpose is obtained by making a diamond band that has the two side walls that, instead of being flat, are equipped with shaped ridges that constitute the abrasive surface of the tool.
Specifically, such ridges consist of surface portions that are arranged, with modular progression, circumferentially and that extend on an entire or both side walls of the diamond band.
Such ridges are obtained through recesses that, substantially, can be grouped into two types of configurations: circumferential rings, arranged concentrically on the side wall of the diamond band and a plurality of plates, arranged substantially transversally with respect to the circumference of the aforementioned rings.
In detail, the plates are arranged rectilinear to each other, with directions that are preferably radial or lying on lines tangent to a concentric and inner circumference with respect to the circumference that constitutes the outer perimeter of the aforementioned band, i.e. with the outer perimeter of the cutting disc.
The ridges can have the sides straight or, preferably, inclined, so as to make sections diverging towards the outside and the plates, moreover, are shaped with a circular outer profile.
Thanks to the presence of such ridges the "polishing" and "greasing" effects of the abrasive ring are substantially delayed and, in wet cutting, they advantageously cause the cooling water cushion that forms on the work surface to be broken.
Laboratory tests and experiments have highlighted the fact that, with the use of the discs equipped with the shaped ridges according to the finding, a better cutting ability and lower consumption (up to 50%) is achieved, with respect to similar tools that use the same type of abrasion to make the diamond band with flat side surfaces.
The finding shall be illustrated better through the description of some possible embodiments thereof, given as a non-limiting example, with the help of the attached tables of drawings, where:

figs. 1 to 4 respectively represent overall and detailed views of a cutting disc according to the finding, in a first possible configuration thereof;
figs. 5 to 8 respectively represent overall and detailed views of a cutting disc according to the finding, in a second possible configuration thereof;
figs. 9 to 12 respectively represent overall and detailed views of a cutting disc according to the finding, in a third possible configuration thereof.

As can be seen in the figures, a so-called diamond-tipped cutting disc, wholly indicated with reference numeral 1, consists of a central disc or core 2 made from steel, equipped with the hole 3 for the attachment to the machine tool and the diamond band or ring 4, welded on the outside.
The ring 4, made from a known abrasive material, is characterised in that its side surface 5 is equipped with shaped ridges 6 that, when in work, help the cutting operation, constituting in themselves the abrasive surface of the disc.
As can be seen in figs. 1 to 4 in a first possible embodiment the shaped ridges, wholly indicated with reference numeral 6 and projecting from the wall 5, comprise plates 8.1, with circular profile, contained inside the border rings 7.
Alternatively, as can be seen in figures 5 to 8, in a second possible embodiment the shaped ridges, wholly indicated with reference numeral 6 and projecting from the wall 5, comprise rings 7, arranged circumferentially and concentrically on the wall 5, which intersect the plates 8.2, with a substantially quadrilateral profile.
Substantially, as can be seen in figs. 9 to 12, with the superposition of the two possible embodiments, a third embodiment is obtained in which, thanks to the mutual interference between the rings 7 and the plates 8.1 and 8.2, an abrasive surface 5 is obtained equipped with shaped ridges 6, which allow a substantially advantageous cutting action such as to completely satisfy all of the processing requirements required for cutting and chamfering all types of stone and ceramic materials.

Claims

DIAMOND-TIPPED CUTTING DISC, to be used for cutting or chamfering different products, from natural stones to ceramics, from granite and marble floor tiles to single fired products and from fine compact clinker bricks to hard porcelain stoneware, said cutting disc consisting of a central disc or core (2) made from steel, equipped with a hole (3) for the attachment to a machine tool and a diamond band in the form of a ring (4), arranged on the outside with respect to the central disc or core (z)
the diamond band (4) having shaped ridges (6) on a side wall (5) or on both of the side walls, said ridges constituting the abrasive surface of the tool wherein the ridges consist of surface portions that are arranged, with modular progression, circumferentially,
said ridges occupying the entire wall of the diamond band,
characterised in that
said ridges (6) are obtained through recesses that define two types of configurations: circumferential rings (7), arranged concentrically on the side wall of the diamond band and a plurality of plates (8), arranged substantially transversally with respect to the circumference of the aforementioned rings, the plates (8) having a circular profile (8.1).
DIAMOND-TIPPED CUTTING DISC, according to claim 1, characterised in that the ridges (6) have straight sides.
DIAMOND-TIPPED CUTTING DISC, according to claim 1, characterised in that the ridges (6) have inclined sides, so as to make sections diverging towards the outside.
DIAMOND-TIPPED CUTTING DISC, according to any of the previous claims, characterised in that the diamond band (4) has the surface (5) equipped with ridges (6) resulting from the mutual intersection between the circumferential rings (7) and of the radial plates (8.1, 8.2).