EP1038647A1 - Outil de coupe de la pierre à segments diamantés dont la hauteur, la largeur et la longeur different d'un segment à l'autre - Google Patents

Outil de coupe de la pierre à segments diamantés dont la hauteur, la largeur et la longeur different d'un segment à l'autre Download PDF

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Publication number
EP1038647A1
EP1038647A1 EP99830160A EP99830160A EP1038647A1 EP 1038647 A1 EP1038647 A1 EP 1038647A1 EP 99830160 A EP99830160 A EP 99830160A EP 99830160 A EP99830160 A EP 99830160A EP 1038647 A1 EP1038647 A1 EP 1038647A1
Authority
EP
European Patent Office
Prior art keywords
segments
cutting
tool
segment
sequence
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.)
Granted
Application number
EP99830160A
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German (de)
English (en)
Other versions
EP1038647B1 (fr
Inventor
Mauro Lunardi
Giuseppe Marocco
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.)
Geo Srl
Original Assignee
Ludomatica 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 Ludomatica Srl filed Critical Ludomatica Srl
Priority to EP99830160A priority Critical patent/EP1038647B1/fr
Priority to ES99830160T priority patent/ES2203051T3/es
Priority to PT99830160T priority patent/PT1038647E/pt
Publication of EP1038647A1 publication Critical patent/EP1038647A1/fr
Application granted granted Critical
Publication of EP1038647B1 publication Critical patent/EP1038647B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B28D1/121—Circular saw blades
    • 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
    • B28D1/124—Saw chains; rod-like saw blades; saw cables
    • 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

  • the present invention refers to a tool provided with segments or sectors or diamond plaques, used for cutting marble, granite, stone in general, conglomerate, cements and similar materials, and to a relative cutting method.
  • the invention refers to a set of diamond segments, containing natural or artificial diamond particles or other hard materials, applied to the external circumference of a disk or on a longitudinal side of a blade.
  • Disks and Blades are generally used for different applications, because of their different uses.
  • the comparison between diamond disks and blades highlights the substantially different use made of diamond plaques applied respectively to the external circumference of the disks or to a longitudinal side of the blades.
  • the differences are substantially in the cutting directionality, cutting speed and speed constancy.
  • the disk in fact rotates always in the same direction while the blades work with an alternating movement varying cyclically the cutting direction.
  • This continuous changing in the cutting direction makes difficult the permanence of the single diamond in the binder in which it is immersed.
  • the bi-directional stress tends to undermine it from its seat, often before its useful life ends, shortening therefore the useful life of the tool.
  • the disk can rotate at a speed believed optimal for cutting the material.
  • speed is suggested to be about 20 m/s for cutting granites rich in quartz and hard stones while rises to 40 m/s and over for cutting calcareous and soft stones.
  • the reciprocating movement and the relevant masses involved limit the possible speed of the tool on the material at values that are less then a tenth then that possible in a disk.
  • the speed of the disk is constant while that of the blade is like a sinusoid that starts from zero, accelerates up to the maximal speed at half travel for returning to zero, for repeating in next movement in the opposite direction.
  • diamond disks are used in single or multi-disk machines for cutting either siliceous hard stones or calcareous soft stones
  • mono or multi blade frame saws the diamond segment blades are used only for cutting marbles, travertine, calcareous onyx, soft stones, sandstone and similar.
  • Cutting granite or hard stones by means of gangsaws is normally performed using metallic grit as abrasive which, carried by the water and mixed with additives, cuts the material because of the entrainment made by the steel blades having a substantially rectilinear reciprocating movement in contact with the material to be cut.
  • a gangsaw equipped with diamond segment blades suitable for cutting hard stones could have obvious environmental advantages relative to a metallic grit frame machine that produces pollutant residual that is expensive and problematical to dispose.
  • Figure 1 shows schematically in a lateral view a cutting tool or blade, realised according to the prior art, in contact with a stone block 3 to be cut and having, on the lower cutting edge, a plurality of diamond segments 2.
  • Patent Application WO 95/22446 discloses a disk with diamond segments having a thickness oversized in the zone of contact and decreasing towards the disk core in a plurality of steps inclined with respect to the cutting direction.
  • Patent US 4,550,708 between the teeth of a disk are placed some openings having the same length of the segment in order to collect the abraded material.
  • Patent US 4,490,039 provides for openings between the diamond teeth extending towards the centre of the disk while the teeth have grooves extending along their height forming channels for the drainage of material.
  • a first object of the present invention is therefore to improve substantially the expulsion process of the abraded material, avoiding counter-abrasive effect and consequently lengthening the tool life.
  • the tool according to the invention can be advantageously used for cutting marble and calcareous stones but also for cutting granite and other very hard stones.
  • the method provides the steps of:
  • This method allows the tool to remove the material progressively, each segment working on a reduced section and therefore on previously weakened material. Moreover, since the three segments realise grooves of different sections, it is always guaranteed a continuous water flow, laterally and below the segments, which facilitates discharge of abraded material.
  • a cutting tool 1 realised according to the present invention, in particular a diamond segments blade.
  • a metal core 10 which in this case is a linear metal band but could be as well a circular disk, has a lower edge 18 to which are applied, by means of weld joints 20, diamond segments 12, 14, 16 made of a mixture of abrasive material and a binder whose characteristics and proportions depend from the material to be cut.
  • the diamond segments are arranged on the blade according to repeated sequences of different segments.
  • Each sequence comprise three segments 12, 14, 16 having, according to a preferred cutting direction pointed out by the arrow 22, a height progressively decreasing and a cutting width progressively increasing.
  • a first segment 12 has indeed a height H1 greater then the height H2 of the second segment 14, which is in turn higher then the third segment having height H3.
  • the first segment 12 however is narrower, cutting width L1, then the second segment 14, cutting width L2, which is in turn narrower then the last segment 16, having width L3.
  • Each segment digs in the stone a groove having a profile different from that of adjacent segments, defining thus a continuous and always open path for the abraded material, carried by the water flow used for its drainage and for cooling the blade during cutting.
  • Figure 5 shows, in a perspective view, the tool 1 previously shown in Figures 3 and 4. In particular it is visible a sequence of segments 12, 14 and 16, fixed to core 10, having height H progressively decreasing and width L progressively increasing.
  • the new shape and the group configuration is useful for diamond disks and for gangsaw diamond blades, wherein it founds a better application in a mono-directional operation of the gangsaw in which the tools are in contact with the material only during the active cycle.
  • a sequence of cutting segments could contain a number of segments different from three, for example only two, or four, five or even more.
  • the spaces 22 comprised between single segments are obviously hollow spaces for the passage of water and abraded material. Now will be analysed the possible drainage flows near each segment.
  • the first segment 12 whose lower portion 26 is immersed in the stone, has laterally two zones 24, horizontally hatched, for lateral drainage, in that it moves in a larger channel dug by the second 14 and third 16 segment.
  • the second segment 14 has a portion 26 immersed in the stone, one lower drainage zone 28, vertically hatched, corresponding to the channel dug by the first segment, and two lateral drainage zones 24, corresponding to the larger channel dug by the third segment 16.
  • the third segment 16 is laterally immersed in the
  • segments 14 and 16 can eventually provide for a central frontal drainage, as shown in detail in Figure 13, made of a longitudinal groove 60, 62, obtained in the lower part of each segment.
  • the first segment 12, more projecting and thinner, can have a thickness which is lower then that of the metal core 10 of the blade while the last segment 16, the less projecting and thicker of the series, defines the lifetime of the tool.
  • the segments comprised in each sequence can advantageously have different lengths, in order to compensate the different heights and widths maintaining constant their volume. This way it is possible to compensate, balancing the wear of various segments, the amount of abrasive material present in each segment. Likewise, for similar requirements, the single segments can also have different mixture characteristics as regards abrasive materials and binding materials.
  • the cutting segments comprise, according to the use, particles of natural or artificial diamond, polycrystalline portions of tungsten carbide or other hard materials, together with various binder materials, for example copper alloys for marbles and soft stones or cobalt alloys for granite and hard stones.
  • binder materials for example copper alloys for marbles and soft stones or cobalt alloys for granite and hard stones.
  • Figures 8 and 9 show, laterally and frontally, a second embodiment of a cutting tool according to the present invention.
  • Three cutting segments 32, 34 and 36, arranged in sequence according to the above described characteristics of decreasing height and increasing width, are joined together in a single cutting element 30.
  • the cutting element 30 can therefore be considered a single segment divided in three different portions, a first portion 32 narrow and high, a middle portion 34 and a last portion 36 lower and larger then the preceding ones.
  • each segment is shown three segments 30, separated by spaces 42, each segment being made of three different portions 32, 34 and 36, during cutting of a stone block 3.
  • the spaces 42 comprised between adjacent segments are obviously open spaces for the passage of water and abraded material. Now will be analysed the possible drainage flows near the single portions of each segment.
  • the first portion 32 has a lower portion 46 immersed in the stone and has laterally two zones 44, horizontally hatched in Figure, for lateral drainage near the larger channels dug by the second 14 and third 16 portions.
  • the second portion 34 has a part 46 immersed in the stone, one lower drainage zone 48, vertically hatched, corresponding to the channel dug by the first portion, and two lateral drainage zones 44, corresponding to the larger channel dug by the third portion 36.
  • the third portion 36 is on the contrary laterally immersed in the stone, while under it is present a drainage flow 48 corresponding to the channels dug by the portion preceding it.
  • the vertical grooves 31 facilitate the passage of the abraded material between adjacent portions of the same segment creating a continuity among various drainage flows.
  • Figure 12 it is shown another embodiment of a cutting tool using diamond segments according to the invention.
  • the segments are arranged, according to ordered sequences 50, on the circumference 11 of a disk shaped metal core 10.
  • the diamond segments are arranged on the disk according to repeated sequences of different segments.
  • Each sequence comprises three segments 52, 54 and 56 having, with respect to the preferred cutting direction pointed out in Figure by the arrow 13, progressively decreasing height and progressively increasing cutting width.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP99830160A 1999-03-22 1999-03-22 Outil de coupe de la pierre à segments diamantés dont la hauteur, la largeur et la longeur different d'un segment à l'autre Expired - Lifetime EP1038647B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99830160A EP1038647B1 (fr) 1999-03-22 1999-03-22 Outil de coupe de la pierre à segments diamantés dont la hauteur, la largeur et la longeur different d'un segment à l'autre
ES99830160T ES2203051T3 (es) 1999-03-22 1999-03-22 Maquina herramienta para el corte de piedras con segmentos diamantados de altura, anchura y longitud variables.
PT99830160T PT1038647E (pt) 1999-03-22 1999-03-22 Ferramenta de cortar pedra de segmentos de diamante com altura espessura e comprimento variaveis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99830160A EP1038647B1 (fr) 1999-03-22 1999-03-22 Outil de coupe de la pierre à segments diamantés dont la hauteur, la largeur et la longeur different d'un segment à l'autre

Publications (2)

Publication Number Publication Date
EP1038647A1 true EP1038647A1 (fr) 2000-09-27
EP1038647B1 EP1038647B1 (fr) 2003-07-16

Family

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Family Applications (1)

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EP99830160A Expired - Lifetime EP1038647B1 (fr) 1999-03-22 1999-03-22 Outil de coupe de la pierre à segments diamantés dont la hauteur, la largeur et la longeur different d'un segment à l'autre

Country Status (3)

Country Link
EP (1) EP1038647B1 (fr)
ES (1) ES2203051T3 (fr)
PT (1) PT1038647E (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002024426A1 (fr) * 2000-09-20 2002-03-28 Geo S.R.L. Outil pour taille de pierre a segments en diamant
AT500151A1 (de) * 2002-08-12 2005-11-15 Boehler Ybbstal Band Gmbh & Co Vormaterial für sägeblätter oder sägebänder
US7082939B2 (en) 2002-12-10 2006-08-01 Diamond Innovations, Inc. Frame saw for cutting granite and method to improve performance of frame saw for cutting granite
US7089924B2 (en) 2001-12-14 2006-08-15 Diamond Innovations, Inc. Granite slabs cut with frame saw employing blades with diamond-containing segments and method of cutting thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866356A (en) * 1930-12-01 1932-07-05 Homer V Jones Saw tooth
US3128755A (en) * 1962-10-01 1964-04-14 Vanguard Abrasive Corp Undercut resistant diamond abrasive saw blade
US3338230A (en) * 1964-11-25 1967-08-29 Frederick W Lindblad Saw and segment therefor
DE1652523A1 (de) * 1967-12-28 1971-04-08 Rolf Eichenlaub Saegeblatt zum Saegen von Stein
DE3034671A1 (de) * 1980-09-13 1982-04-29 Hellmann, Bernd, 6740 Landau Verfahren zum einbringen von fugen in mauerwerk und vorrichtung zur durchfuehrung des verfahrens
US4940039A (en) * 1987-04-16 1990-07-10 Rudolf Buettner Cutting tool
WO1995022446A1 (fr) * 1994-02-17 1995-08-24 Diamant Boart S.A. Segment de coupe a concretion diamantee

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866356A (en) * 1930-12-01 1932-07-05 Homer V Jones Saw tooth
US3128755A (en) * 1962-10-01 1964-04-14 Vanguard Abrasive Corp Undercut resistant diamond abrasive saw blade
US3338230A (en) * 1964-11-25 1967-08-29 Frederick W Lindblad Saw and segment therefor
DE1652523A1 (de) * 1967-12-28 1971-04-08 Rolf Eichenlaub Saegeblatt zum Saegen von Stein
DE3034671A1 (de) * 1980-09-13 1982-04-29 Hellmann, Bernd, 6740 Landau Verfahren zum einbringen von fugen in mauerwerk und vorrichtung zur durchfuehrung des verfahrens
US4940039A (en) * 1987-04-16 1990-07-10 Rudolf Buettner Cutting tool
WO1995022446A1 (fr) * 1994-02-17 1995-08-24 Diamant Boart S.A. Segment de coupe a concretion diamantee

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002024426A1 (fr) * 2000-09-20 2002-03-28 Geo S.R.L. Outil pour taille de pierre a segments en diamant
US7089924B2 (en) 2001-12-14 2006-08-15 Diamond Innovations, Inc. Granite slabs cut with frame saw employing blades with diamond-containing segments and method of cutting thereof
AT500151A1 (de) * 2002-08-12 2005-11-15 Boehler Ybbstal Band Gmbh & Co Vormaterial für sägeblätter oder sägebänder
AT500151B1 (de) * 2002-08-12 2007-09-15 Boehler Uddeholm Prec Strip Gm Vormaterial für sägeblätter oder sägebänder
US7082939B2 (en) 2002-12-10 2006-08-01 Diamond Innovations, Inc. Frame saw for cutting granite and method to improve performance of frame saw for cutting granite
US7096863B2 (en) 2003-12-23 2006-08-29 Diamond Innovations, Inc. Granite slabs cut with frame saw employing blades with diamond-containing segments and method of cutting thereof

Also Published As

Publication number Publication date
EP1038647B1 (fr) 2003-07-16
PT1038647E (pt) 2003-11-28
ES2203051T3 (es) 2004-04-01

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