EP0839620A1 - Lame de coupe diamantée pour couper des matériaux pierreux défectueux - Google Patents

Lame de coupe diamantée pour couper des matériaux pierreux défectueux Download PDF

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Publication number
EP0839620A1
EP0839620A1 EP97119360A EP97119360A EP0839620A1 EP 0839620 A1 EP0839620 A1 EP 0839620A1 EP 97119360 A EP97119360 A EP 97119360A EP 97119360 A EP97119360 A EP 97119360A EP 0839620 A1 EP0839620 A1 EP 0839620A1
Authority
EP
European Patent Office
Prior art keywords
inserts
cutting
blade
segments
diamond
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.)
Withdrawn
Application number
EP97119360A
Other languages
German (de)
English (en)
Inventor
Paolo Bernieri
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.)
Diamond Pauber Srl
Original Assignee
Diamond Pauber Srl
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 Diamond Pauber Srl filed Critical Diamond Pauber Srl
Publication of EP0839620A1 publication Critical patent/EP0839620A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/127—Straight, i.e. flat, saw blades; strap saw blades

Definitions

  • diamond frames As known since many years, marble or stone blocks are cut into slabs by means of special machines called “diamond frames", making use of diamond tools known as “diamond blades".
  • Such machines consist of a blade carrying frame, moved with a reciprocating motion, on which the diamond blades are mounted perfectly parallel and mutually spaced at a preset distance.
  • the diamond blades are kept longitudinally tensioned by special tension means and laterally spaced by appropriate spacing rules.
  • the diamond blades consist of a steel band, normally having a section of 180x3 mm and a length of about 4,000 mm. On their lower edge, forming the cutting edge, they carry small abrasive inserts called “diamond segments”, suitably welded at a reciprocal distance. Diamond segments of this type are described, for example, in the EP-A-0.090.274.
  • the blade carrying frame with the blades mounted in this way, is moved not only with a longitudinal reciprocating motion, but also so as to perform a slow downward movement onto the marble block, thereby cutting it into slabs.
  • the blocks show defects of shape or compactedness, especially clefts or inner cavities, this may easily cause the breakaway of the diamond segments, with consequent damage for the block and for the blades involved.
  • Said breakaway is normally produced by small marble or stone chips which, finding themselves inside the cavities present in the block, or breaking off from said block in correspondence of its defective parts, remain loose into said clefts or cavities, and are stuck therein with no possibility to be expelled.
  • the blade or, rather, the diamond segments welded thereon get in contact with such small marble or stone chips, these may interpose themselves between the diamond segments (moving with a reciprocating motion) and, in some cases, stand in the way and form a sharp obstacle, thereby causing, through impact, the sudden breakaway of one or more segments.
  • the number of removed segments corresponds to the number of segments welded onto a blade section, the length of which corresponds to the length of the stroke of the reciprocating motion of the blade carrying frame through the cavities present in the block.
  • the object of the present invention is therefore a diamond blade structure which, even when working in conditions as those described heretofore, allows to prevent the drawback of the diamond segments breaking away. Said object is reached with a cutting blade of the type carrying, fixed on its cutting edge and suitably spaced, a plurality of "diamond segments" meant to perform the cutting, characterized in that the space between the diamond segments, along the cutting edge and at least next to the inner corners of such segments, is filled with material apt to wear more easily than the actual diamond segments.
  • said material is in the form of inserts consisting of bronze or brass parallelepiped elements, fixed projecting from the cutting edge of the blade and mutually spaced by a few millimeters, so as to substantially fill the entire space between the diamond segments, the lower edge of said inserts being aligned with the lower edge of the diamond segments to form a rectilinear cutting edge.
  • said inserts are shaped as a triangle so as to fill merely the space in correspondence of the inner corners of the diamond segments, the lower edge of the inserts being beveled in respect of the lower edge of the diamond segments to form a continuous undulated cutting edge.
  • the cutting edge of the blade does not have an indented structure, but a substantially continuous rectilinear or undulated structure, so as to allow no jamming or impact between the tips of the diamond segments and the dead cavities or holes which may be present in the marble or stone blocks.
  • the GB-381229 describes a blade onto which there are applied carborundum (carbon silicide) teeth.
  • a partial filling of soft material is provided between the teeth, to simply allow the blade to flect while being handled, thereby preventing the breakage of the carborundum teeth.
  • the blade described in GB-381229 is not subject to the problems deriving from impacts with stone chips and splinters, since the teeth are applied on the blade at a very short mutual distance.
  • the use of diamond in the cutting blades was still unknown, and thus also the problems connected thereto.
  • the FR-1.568.331 provides for clefts between the various diamond sectors forming the cutting disk.
  • the disk blade does not normally suffer from the problems tied to the irregularities of the stone block, especially as the clefts between the diamond sectors are very narrow and do not allow the insertion of stone splinters.
  • the clefts are filled with an easily weldable material, as silver, to prevent beats and vibrations causing noise and cutting irregularities.
  • a first quite simple embodiment of the present invention illustrated in fig. 4, into the cutting edge 3' of the blade 3 there are formed notches 6, into which the diamond segments 7 are fixed so that their lower edge is substantially aligned with the edge 3' of the blade 3; in this way, the cutting edge is substantially rectilinear and continuous, and thus free from sharp corners which may cause impacts or jamming.
  • the drawback of this embodiment is that the steel edge of the blade, when worn, produces friction against the cutting groove, without actually performing the cutting, and thus tends to stop the blade from moving downward into the stone block.
  • Such inserts 8 are fixed to the steel blade by welding or glueing and their dimensions are such that a single insert, or more side-by-side inserts, can substantially fill the entire space between one diamond segment 7 and the next, leaving however small gaps apt to favour an improved circulation of the washing water inside the cutting groove.
  • This arrangement allows to obtain blades having once more a substantially rectilinear and continuous cutting edge, namely without any wide gaps allowing to house stone chips or splinters, and thus able to cut through holes or dead cavities of any shape and size without causing the undesired and expensive problem of the breakaway of the diamond segments.
  • the inserts 8 - instead of having a substantially rectangular shape, like those of the embodiment shown in fig. 5 - are shaped as a triangle and are fixed in correspondence of the inner corners of the diamond segments 7.
  • the lower surface of such inserts 8 is thus oblique and forms a beveling between the lower edge 3' of the blade 3 and the lower surface of the diamond segments 7.
  • the longitudinal dimension of said triangular inserts 8 may differ from that shown in fig. 6, and it can vary - for instance, according to the type of cutting operation having to be performed by the blade - from a minimum, essential to form a beveling, to a maximum, corresponding to half of the distance between one diamond segment and the next.
  • Figs. 7 and 8 show, by way of example, two types of blunt and easily wearable inserts according to the present invention.
  • Fig. 7 shows an insert 8 comprising, along its top surface, a groove 8a to center and fix said insert onto the cutting edge of the blade, and comprising, on its opposite side surfaces, oblique grooves 9a and 9b, which are preferably oblique in opposite directions, so as to create a turbulence in the washing water which settles onto the bottom of the cutting groove and thereby improve the washing action.
  • Fig. 8 shows another type of insert 8, which also comprises a series of through holes 8b to reduce the friction on the cutting surface.
  • said inserts are of bronze or of brass, since these materials are, at the same time, easily wearable and easy to weld onto the edge of the steel blade. It is evident, however, that also other materials can be used, either of metal or synthetic, providing each time for suitable fixing techniques.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP97119360A 1996-11-07 1997-11-05 Lame de coupe diamantée pour couper des matériaux pierreux défectueux Withdrawn EP0839620A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI960734U 1996-11-07
IT96MI000734 IT240994Y1 (it) 1996-11-07 1996-11-07 Lama di taglio del tipo diamantato per materiali lapideipresentanti dei difetti

Publications (1)

Publication Number Publication Date
EP0839620A1 true EP0839620A1 (fr) 1998-05-06

Family

ID=11373996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119360A Withdrawn EP0839620A1 (fr) 1996-11-07 1997-11-05 Lame de coupe diamantée pour couper des matériaux pierreux défectueux

Country Status (3)

Country Link
EP (1) EP0839620A1 (fr)
ES (1) ES2114844T1 (fr)
IT (1) IT240994Y1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0879683A2 (fr) * 1997-05-23 1998-11-25 Stalber S.r.l. Outil à couper de la pierre à faible émission sonore et machine utilisant celui-ci
ES2261043A1 (es) * 2004-11-16 2006-11-01 Granic Roc, S.A. Sistema de corte de bloques de piedra mediante cinta flexible con segmentos diamantados y poleas de arrastre sincrono.
WO2020025143A1 (fr) * 2018-08-03 2020-02-06 Husqvarna Ab Lames de scie améliorées pour agencements de scie à lames multiples

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB381229A (en) * 1931-07-03 1932-10-03 Frank Harris Improvement relating to saws for cutting stone and the like
FR1026618A (fr) * 1950-10-27 1953-04-29 Perfectionnements aux disques tronçonneurs abrasifs
US3016661A (en) * 1959-11-02 1962-01-16 Waldemar C Nidlsen Cutting device
US3122030A (en) * 1960-08-23 1964-02-25 Super Cut Method of assembling a rotary saw blade with peripheral diamond teeth
FR1568331A (fr) * 1968-03-29 1969-05-23
EP0090274A2 (fr) * 1982-03-25 1983-10-05 DIAMOND PAUBER S.r.l. Elément abrasif obtenu par la déposition électrolytique de diamants
US4679541A (en) * 1984-10-05 1987-07-14 W. F. Meyers Company, Inc. Belt-configured saw for cutting slots into stone
US5184598A (en) * 1991-07-15 1993-02-09 Blount, Inc. Saw chain for aggregate materials

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB381229A (en) * 1931-07-03 1932-10-03 Frank Harris Improvement relating to saws for cutting stone and the like
FR1026618A (fr) * 1950-10-27 1953-04-29 Perfectionnements aux disques tronçonneurs abrasifs
US3016661A (en) * 1959-11-02 1962-01-16 Waldemar C Nidlsen Cutting device
US3122030A (en) * 1960-08-23 1964-02-25 Super Cut Method of assembling a rotary saw blade with peripheral diamond teeth
FR1568331A (fr) * 1968-03-29 1969-05-23
EP0090274A2 (fr) * 1982-03-25 1983-10-05 DIAMOND PAUBER S.r.l. Elément abrasif obtenu par la déposition électrolytique de diamants
US4679541A (en) * 1984-10-05 1987-07-14 W. F. Meyers Company, Inc. Belt-configured saw for cutting slots into stone
US5184598A (en) * 1991-07-15 1993-02-09 Blount, Inc. Saw chain for aggregate materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0879683A2 (fr) * 1997-05-23 1998-11-25 Stalber S.r.l. Outil à couper de la pierre à faible émission sonore et machine utilisant celui-ci
EP0879683A3 (fr) * 1997-05-23 2000-12-20 Stalber S.r.l. Outil à couper de la pierre à faible émission sonore et machine utilisant celui-ci
ES2261043A1 (es) * 2004-11-16 2006-11-01 Granic Roc, S.A. Sistema de corte de bloques de piedra mediante cinta flexible con segmentos diamantados y poleas de arrastre sincrono.
WO2020025143A1 (fr) * 2018-08-03 2020-02-06 Husqvarna Ab Lames de scie améliorées pour agencements de scie à lames multiples

Also Published As

Publication number Publication date
ITMI960734V0 (it) 1996-11-07
ES2114844T1 (es) 1998-06-16
ITMI960734U1 (it) 1998-05-07
IT240994Y1 (it) 2001-04-20

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