WO1999028103A1 - Procede, outil et appareil de sciage de blocs de pierre - Google Patents

Procede, outil et appareil de sciage de blocs de pierre Download PDF

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Publication number
WO1999028103A1
WO1999028103A1 PCT/IB1998/001885 IB9801885W WO9928103A1 WO 1999028103 A1 WO1999028103 A1 WO 1999028103A1 IB 9801885 W IB9801885 W IB 9801885W WO 9928103 A1 WO9928103 A1 WO 9928103A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
core
diameter
rotation axis
cutting tool
Prior art date
Application number
PCT/IB1998/001885
Other languages
English (en)
Inventor
Ampelio Stangherlin
Original Assignee
Simec S.P.A.
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 Simec S.P.A. filed Critical Simec S.P.A.
Priority to AU11698/99A priority Critical patent/AU1169899A/en
Publication of WO1999028103A1 publication Critical patent/WO1999028103A1/fr

Links

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
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • 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
    • B28D1/122—Circular saw blades with exchangeable cutter bits or cutter segments

Definitions

  • the present invention relates to a method for continuously sawing blocks of marble, granite and other stony material.
  • the present invention also concerns a tool and an apparatus for carrying out such sawing method.
  • a machine for sawing blocks of stony materials in slabs which essentially comprises a tool having the shape of a circular planar ring with a diameter of at least 3 meter and a relatively small thickness, as well as a series of cutting elements, along the peripheral outer edge thereof.
  • Motorized driving means are arranged on opposite sides of the tool, to make the tool rotate around its own axis; guiding means are further provided to keep the tool in a fixed plane perpendicular to said axis.
  • the block of workpiece is placed on a carriage mobile with respect to the tool along a horizontal direction which is substantially parallel to a diameter of the cutting tool.
  • said known machine allows for continuously sawing blocks of great dimensions, i. e. with a unique cutting without successive traverses along seams previously made by the cutting tool.
  • the machines that use such known cutting tools have a discontinuous operating method, i.e. with successive traverses, or with low cutting speeds, which entails low efficiency and high operation costs.
  • the main purpose of the present invention is to eliminate the above mentioned drawbacks by means of a method, a tool and an apparatus for sawing blocks of marble, granite and other stone material that allows continuous cutting of large slabs with high speed and low costs.
  • Another purpose of the present invention is to provide a tool and machine that allow the continuous sawing of blocks of more than 2 meter height.
  • Another purpose of the present invention is to provide a tool and an apparatus that allows the lowest possible waste of raw material.
  • Yet another important purpose of the present invention is to provide a tool for continuous sawing of blocks of marble, granite and other stony materials having large dimensions that can be made with materials commonly available in the commerce at relatively low price.
  • a method for continuously sawing blocks of marble, granite and other stony materials by means of a planar circular tool having reduced thickness which, in accordance with claim 1 , has a substantially core, with a diameter of at least 5 meter and a diameter to thickness ratio at least equal to 600, in which the cutting tool rotation axis is always held above the top side of the workpiece.
  • the invention also provides a tool according to claim 4 and an apparatus according to claim 1 5.
  • Fig. 1 shows a front view of an apparatus and tool according to the invention
  • Fig. 2 shows a sectional side view of the apparatus of Fig 1 along the section plane ll-ll;
  • Fig. 3 shows a top view of the tool according to the invention
  • Fig. 4 shows a detail of the tool of Fig 3;
  • Fig. 5 shows an enlarged section view of a detail of Fig 4 along plane V-V;
  • Fig.6 shows an enlarged section view of another detail of Fig. 4 along plane VI-VI;
  • Fig. 7 shows an enlarged front view of another detail of Fig. 4.
  • Fig. 8 shows an enlarged view of a detail of Fig. 3;
  • Fig. 9 shows an enlarged view with a partial section of the detail of Fig. 8.
  • Fig. 1 0 shows a section view along plane X-X of the detail of Fig. 9;
  • Fig. 1 1 shows an expanded view of the detail of Fig. 1 0;
  • an apparatus for sawing blocks of marble is comprised of a support frame 2, formed by a pair of solid columns 3, 4 fixed on the respective piers 5,6 respectively mounted on the floor of the room where the apparatus is located.
  • the columns 3, 4 are fixedly connected to one another by means of a pair of horizontal crossbeams 7,8 and are provided with respective vertical guides 9, 10.
  • a structure generally identified 1 1 holding a cutting tool is supported by the support frame 2, said structure 1 1 being essentially formed by a pair of substantially parallel and horizontal beams 1 2, 1 3, said pair of beams being connected by a pair of plates 1 4, 1 5 so as to define therebetween a space 1 6 suitable to accommodate a cutting tool.
  • Two slides 1 7, 1 8, which are slidably mounted along the vertical guides 9, 1 0 of columns 3, 4 are anchored to plates 1 4, 1 5.
  • Beams 1 2, 1 3 support a guard or protecting shroud 1 9 for a disc-shaped cutting tool generally identified 20, hereafter described more in detail.
  • Tool 20 is formed by a core 21 of generally circular shape, and has on the peripheral edge thereof a series of diamond or cutting elements which are fixed in circumpherentially adjacent positions.
  • a central flange 23 is fixed to core 21 and supports a bearing 24 for a shaft 25 which extends along a substantially horizontal rotation axis R.
  • the cutting tool has a remarkably large diameter D, both in an absolute and in a relative sense, i.e. as a ratio to the tool thickness S.
  • core 21 has a diameter equal to at least 5 meter and a diameter to thickness ratio equal to at least 600.
  • the tool core is selected to have a diameter of 51 60 mm, so as to enable the direct and continuous cutting of blocks having a dimension greater than 2000 mm, and a thickness of 8mm, so as to considerably reduce material waste during sawing.
  • core 21 is obtained by the assembly of a multiciplity of partial elements 26 of metal plate having maximum thickness S. More particularly, such partial elements comprise a series of annular sections 27 placed side-by-side and connected to one another and to a circular-shaped inner flange 28.
  • both the flange and the annular sections from commercially available plates, which have reducer dimensions as compared with those of the tool assembly 20, are of high quality though having a relatively low cost.
  • each annular section 27 has radial and rectilinear edges 29, 30 and a generally circular convex inner edge 31 .
  • Face joints are arranged along edges 29,30,31 , said joints being formed by a series of juts 32 made on one of the edges 29, 30 of the annular sections and which can be facingly connected in corresponding seatings 33 with a complementary shape, e.g. with ellipsoidal profiles, arranged on the adjacent side of the next annular section.
  • a complementary shape e.g. with ellipsoidal profiles
  • connecting elements are provided, which are formed by screws 34 with flared head and by nuts or bushes 36 having cylindrical body 37 and flared head 38. Screws 34 and bolts 36 after screwing have a total width smaller that the overall thickness S of the core plate. Both flared heads of screws and bolts are housed in respective, complementary shaped holes 39, 40 formed on opposite edges of the frontal joints. Obviously, juts or seatings may be arranged on the lateral edges of each annular sections 27 on the same side or on opposite sides thereof, so as to connect adjacent joints.
  • circumferentially shaped cuts are formed on the opposite sides of the outer circular edge 41 of the annular sections 27, so as to locally provide a reduced thickness of the element T ⁇ S.
  • cutting elements 42 having a substantially U-shaped cross section with maximum thickness S and central spacing 43 slightly greater than thickness T.
  • cutting elements 42 may be fixed on the edge 41 of peripheral annular sections 27 by means of the same fixing means 34, 36 above described, or by any equivalent means.
  • the machine 1 comprises first motor means arranged for rotatively driving the cutting tool around its own rotation axis R, preferably at steady angular speed.
  • first motor means may preferably consists of a pair of electrical motors 44, 45 with rubber wheels 46, 47 mounted on respective axes, in facing relationship and in frictional rolling engagements at the peripheral portion of the cutting tool 21 .
  • Second motor means are provided to drive the cutting tool 20 along a first and substantially vertical direction of arrow V. More particularly, such second motor means may be constituted by worm gears 48, 49 mounted on slides 1 7, 1 8 and connected to respective driving screws 50, 51 which are synchronously driven by a motor reduction gear 52. Upon rotation of screws 48, 49, the tool support structure 1 1 will be selectively raised or lowered in a controlled manner.
  • Third motor means are also provided to drive the cutting tool 20, so as to promote oscillation thereof in the second horizontal direction P, substantially perpendicular to the first direction V.
  • the rotation shaft 25 of tool 20 is supported at the ends thereof by a pair of short arms 53, 54 fixed on respective coaxial hubs 55, 56.
  • These latter hubs can synchronously rotate about an oscillation axis O, which is parallel and transversally staggered, with eccentricity E, with respect to the rotation axis R of the cutting tool 20.
  • Hubs 55, 56 are journalled on respective bearings 57,58 arranged on the side wall of shroud 1 9.
  • Hub 56 is provided with an axial extension 59 to which an arm 60 is rigidly attached.
  • a link rod 62 is connected to end 61 of arm 6, said link rod being connected to a crank-lever 63 which is in turn driven by a motor reduction gear 64.
  • the above described connecting-rod mechanism produces a swinging motion of the cutting tool rotation axis R, so as to make the cutting tool contact the workpiece in different zones of it periphery thereby reducing unit load and thermal stress and enhancing penetration of the cutting tool in the raw material.
  • Fourth motor means are also provided which are suitable to drive in translatory motion a workpiece transportation carriage 65 in steps of predetermined length in direction H, parallel to the cutting tool rotation axis R.
  • the carriage 65 can move along rails 66 anchored to the floor G and can be driven by a motor reduction gear 68 which engages a screw 69 connected to a nut fixed to said carriage 65.
  • a motor reduction gear 68 which engages a screw 69 connected to a nut fixed to said carriage 65.
  • lateral support means are arranged on both sides of the core 21 .
  • Such support means may comprise a series of pads 70 having planar or slightly convex shape, evenly distributed over the core, resiliently urging the opposite sides of the web 21 and supplied with water under high pressure to support such web with the lowest possible friction factor and to also provide cooling of the cutting surface.
  • planar pads 70 located below beams 1 2, 1 3, in the portion thereof where the cutting tool engages the workpiece B can be mounted at the ends of linear actuators, e.g. pneumatic or hydraulic cylinders, having respective axes substantially perpendicular to the vertical plane of the cutting tool.
  • Cylinders 71 can be fed by a control unit that controls the selective movement away or towards the core21 in the portion of the tool 20 that is in contact with the workpiece.
  • the cutting tool is driven into rotation at substantially steady speed.
  • Tool 20 is subject to a continuous feeding movement towards the workpiece B in a vertical direction V parallel to its extension plane as well as to an oscillation with respect to the block in a parallel direction to its plane and perpendicular to the feeding direction V.
  • the carriage 65 is displaced shifted along direction H by a predetermined distance that amounts the thickness of the slab to be cut.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

L'invention concerne une machine de sciage de blocs de marbre, de granit et d'autres matières pierreuses, la machine comprenant un cadre de support (2) d'un outil circulaire (20) et un chariot (65) destiné à transporter les blocs disposés sous l'outil. On introduit verticalement l'outil rotatif (20) dans le bloc fixe, tout en imprimant un mouvement oscillant à l'outil. L'outil (20) comprend une âme à rebord circulaire (28) comprenant des sections annulaires (27) qui sont reliées à l'âme (28) dans leur partie centrale. Des éléments de coupe de diamant (429 sont montés sur les sections annulaires (27). L'ensemble âme (28) et sections (27) possède un rapport diamètre-épaisseur d'au moins 600, avec un diamètre (D) égal à au moins 5m. Les sections (27) sont réciproquement couplées le long de leur bords contigus. Chaque section (27) présente des éléments d'assemblage de face à proximité de ses bords circulaires radial (29, 30) et intérieur (31).
PCT/IB1998/001885 1997-12-04 1998-11-27 Procede, outil et appareil de sciage de blocs de pierre WO1999028103A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11698/99A AU1169899A (en) 1997-12-04 1998-11-27 Method, tool and apparatus for sawing stone blocks

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97VI000213A IT1297514B1 (it) 1997-12-04 1997-12-04 Metodo, utensile e macchina per la segagione continua di blocchi di marmo, granito ed altri materiali lapidei.
ITVI97A000213 1997-12-04

Publications (1)

Publication Number Publication Date
WO1999028103A1 true WO1999028103A1 (fr) 1999-06-10

Family

ID=11426513

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1998/001885 WO1999028103A1 (fr) 1997-12-04 1998-11-27 Procede, outil et appareil de sciage de blocs de pierre

Country Status (3)

Country Link
AU (1) AU1169899A (fr)
IT (1) IT1297514B1 (fr)
WO (1) WO1999028103A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1083321C (zh) * 1999-12-01 2002-04-24 刘新华 圆盘锯石机
SG115463A1 (en) * 2001-04-25 2005-10-28 Towa Corp Cutting apparatus and cutting method

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1690544A (en) * 1926-12-06 1928-11-06 Mcgovern Daniel Fredrick Detachable saw tooth
US1775354A (en) * 1929-07-16 1930-09-09 Mcgovern Daniel Frederick Stone saw
GB346500A (en) * 1930-02-03 1931-04-16 Bramley Engineering Company Lt Improvements in or relating to machinery or apparatus for cutting stone, wood, metals, and other materials
US1976164A (en) * 1930-02-03 1934-10-09 Bramley Engineering Co Ltd Machinery or apparatus for cutting stone, wood, metals, and other materials
US2506076A (en) * 1948-09-16 1950-05-02 Swenson Granite Co Inc John Stonecutting machine
GB945639A (en) * 1961-11-06 1964-01-02 Ad Leimgruber & Cie A G Improvements in circular saws
US3795078A (en) * 1972-11-01 1974-03-05 Norton Co Segmental cut-off wheel
US4069622A (en) * 1972-05-15 1978-01-24 Tyrolit-Schleifmittelwerke Swarovski K.G. Improvements in or relating to an abrasive wheel
US4257302A (en) * 1973-10-31 1981-03-24 Ledermann & Co. Saw tool

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1690544A (en) * 1926-12-06 1928-11-06 Mcgovern Daniel Fredrick Detachable saw tooth
US1775354A (en) * 1929-07-16 1930-09-09 Mcgovern Daniel Frederick Stone saw
GB346500A (en) * 1930-02-03 1931-04-16 Bramley Engineering Company Lt Improvements in or relating to machinery or apparatus for cutting stone, wood, metals, and other materials
US1976164A (en) * 1930-02-03 1934-10-09 Bramley Engineering Co Ltd Machinery or apparatus for cutting stone, wood, metals, and other materials
US2506076A (en) * 1948-09-16 1950-05-02 Swenson Granite Co Inc John Stonecutting machine
GB945639A (en) * 1961-11-06 1964-01-02 Ad Leimgruber & Cie A G Improvements in circular saws
US4069622A (en) * 1972-05-15 1978-01-24 Tyrolit-Schleifmittelwerke Swarovski K.G. Improvements in or relating to an abrasive wheel
US3795078A (en) * 1972-11-01 1974-03-05 Norton Co Segmental cut-off wheel
US4257302A (en) * 1973-10-31 1981-03-24 Ledermann & Co. Saw tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1083321C (zh) * 1999-12-01 2002-04-24 刘新华 圆盘锯石机
SG115463A1 (en) * 2001-04-25 2005-10-28 Towa Corp Cutting apparatus and cutting method

Also Published As

Publication number Publication date
IT1297514B1 (it) 1999-12-17
AU1169899A (en) 1999-06-16
ITVI970213A1 (it) 1999-06-04
ITVI970213A0 (it) 1997-12-04

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