EP1011943B1 - Scie a cadre oscillant renforce destine a decouper des blocs de pierre - Google Patents

Scie a cadre oscillant renforce destine a decouper des blocs de pierre Download PDF

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Publication number
EP1011943B1
EP1011943B1 EP98919461A EP98919461A EP1011943B1 EP 1011943 B1 EP1011943 B1 EP 1011943B1 EP 98919461 A EP98919461 A EP 98919461A EP 98919461 A EP98919461 A EP 98919461A EP 1011943 B1 EP1011943 B1 EP 1011943B1
Authority
EP
European Patent Office
Prior art keywords
cursors
machine
oscillating frame
guides
frame
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.)
Expired - Lifetime
Application number
EP98919461A
Other languages
German (de)
English (en)
Other versions
EP1011943A1 (fr
Inventor
Luigi Pedrini
Sergio Berti
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.)
Individual
Original Assignee
Individual
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
Priority claimed from IT97MO000075 external-priority patent/IT1292719B1/it
Priority claimed from IT97MO000076 external-priority patent/IT1292720B1/it
Application filed by Individual filed Critical Individual
Publication of EP1011943A1 publication Critical patent/EP1011943A1/fr
Application granted granted Critical
Publication of EP1011943B1 publication Critical patent/EP1011943B1/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
    • B28D1/06—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with reciprocating saw-blades
    • B28D1/068—Components, e.g. guiding means, vibrations damping means, frames, driving means, suspension

Definitions

  • the invention relates to oscillating frame for cutting blocks made of granite and stone in general, having a system for stiffening the cursors, that is, a machine for cutting granite blocks into large slabs by means of a single sawing action, having a new type of cursor support structure and suspension arm support structure which improve productivity while simultaneously guaranteeing a long service life.
  • Prior art comprises machines for cutting granite blocks with a horizontal rectangular frame carrying a series of blades sliding on and within the granite block, the oscillating motion being provided by a rotor and connecting rod mechanism.
  • the forwards and backwards motion of the said blades pulls with them the abrasive elements of the cutting fluid with which they are continuously supplied, within the slots that are gradually formed in the block, thereby obtaining the cutting action;
  • the blade-holder frame is suspended by arms hinged to cursors which move vertically on the columns of the machine, driven synchronously to impart the feed motion: the said cursors protrude from the columns on the front and rear sides.
  • the granite block is positioned between the said columns.
  • the production capacity depends on the length and frequency of the strokes of the said blade-holder frame and on the radius of the arms.
  • the prior art does not resolve the mechanical problems associated with the high mass of the blade-holder frame, due mainly to the high shear stresses applied by the connecting rod, and with the high frequency of the strokes, which put a considerable strain on the cursors in particular and on the whole machine in general, also due to the non-stop duty cycle of these machines.
  • the cursors consist of pivots at the ends of the suspension arms, sliding in vertical guides in the said columns of the machine, and protruding from them, suitably constructed with spherical roller bearings as they are often subjected to misalignment between each other and swing axis of the said arms.
  • Such prior art may be subject to considerable improvement with a view to the possibility of ensuring that the said cursors are much less likely to take on an incorrect position due to the high stresses imparted by the blade-holder frame.
  • the presence of the cross-beam joining the cursors enable the moment applied to them to be reduced, particularly in a vertical direction, due to the mass of the frame which during its swing covers a vertical distance of between 20 and 40 mm; furthermore, the cross-beam enables the suspension arms to be fixed with pins in the same vertical plane as the coupling pins on the frame, further reducing the bending moment transmitted to the supporting columns; the extension of the cursors upwards enables longer suspension arms to be used giving a longer stroke in the horizontal direction and a shorter stroke in the vertical direction, this increasing the portion of stroke having favourable conditions for cutting and, due to the pulling effect, increasing the exchange of the cutting fluid.
  • the arrangement of the pins of the suspension arms in a single longitudinal vertical plane enables machines to be obtained having ample frontage without the limits imposed by prior art cursors; so the side members stiffen the cursors, further reducing the bending moment transmitted to the supporting columns; moreover, the closed structure joining the cursors, made up of the side members and cross-beams, ensures they work together in reducing the misalignment and rotation caused by the forces of the blade-holder frame; furthermore, the guides being positioned on the external side of the columns prevents them from being sprayed with cutting fluid.
  • the figures show, in the first version, 41, Figure 11, the horizontal oscillating blade-holder frame driven by the connecting rod 42, coupled to it, in its forward and backward motion over and within the block 43 being cut; 44, Figure 12, the blades fixed to the structure 45 of the said blade-holding frame, that penetrate inside the said block by means of the abrasive action of the cutting fluid; 46, the trolley which may move on rails 47 for positioning the block within the cutting area of the frame 41; 48, the columns of the machine near the top of which there are the fixed longitudinal and transverse connecting beams 49; 50 and 51, respectively, the shafts and the mechanical gearboxes for the downward supply motion imparted to the said frame 41; 52, the suspension pins of the said blade-holding frame, joined by means of the suspension arms 53 and in turn coupled by means of end pins 54 to the cursors 55, joined together by the cross-beam 56; 57, the control screw for the vertical movement of the cursors along the guides 58 inside the column, open on the front side; 59, Figure 13,
  • the figures also show, in the second version, 62, Figure 14, the long suspension arms joined and coupled to the extended structure 64 of the cursors 65 by means of the end pins 63 with axial thrust bearing: these are joined by the said side members 60, the front ones with the rear ones on the same side 61; B, Figure 24, the hub of the said arms 62 in which is lodged the pin P, in turn supported in the race C by means of the roller bearings D and E, adjusted by spacers F and ring nuts G; L, the labyrinth protecting the seal T on the said pin P.
  • the figures moreover show, in the third version, 66, Figure 17, the long suspension arms joined and coupled by means of end pins 54 to the extensions 67 joined together by the cross-beam 68; 69, the side members on external side 61 of the machine joining the front and rear extensions 67; 70, the guides positioned on the external side of the said columns 48, shielded by a protective U-shaped cover 71 fixed to the said columns; 72, Figure 18, the sliding shoe coupling the said side member 69, the guides 70 and the control screw 73, Figure 20, enable the passage of the said protective covering; 74, the coupling block between the shoe and the control screw; 75, the box structure with weight-saving holes 76 in the internal walls; 77, the U-shaped slot in the shoe 72 to allow the passage of the said fixed protective cover 71; 78, the sliding surfaces of the guides with transverse abutment and 79, the longitudinal abutments in the external sides of the coupling block 74; 80, the internal surface of the said columns 48.
  • the figures finally show, in the fourth version, 81, Figure 21, the suspension arms joined and coupled by means end pins 54 to the internal extensions 82, in turn joined by the cross-beam 83; 84, the longitudinal side members on the internal to the side 61 of the machine joining the front and rear extensions 82; 85, the guides positioned on the internal side of the said columns 48, shielded by a U-shaped protective covering fixed to the said columns; 87, the shoe coupling the said internal extension 82, the guides 85 and the control screw, analogous to the screw 73 of Figure 20, allowing the passage of the fixed protective covering 86: the said internal guides are identical to those described for the third version in relation to the parts visible in Figure 20.
  • the oscillating frame with the stiffening system operates as follows: in the first version in Figures 11 to 13, the cursors 55, whilst sliding on guides 58 of known type and coupled to the control screw 57, they are subject to reduced loads causing misalignment due to the centrifugal acceleration and the weight of the blade-holding frame 41, which arise with high oscillation frequency, cancelling out both the transverse and the longitudinal bending moment.
  • the longitudinal bending moment arising from the advanced position of the pins 52 and 54 with respect to the guides 58, the longitudinal offset in Figure 11, is counteracted by the reaction of the side member 60 connected to the cursor 55 on the opposite side.
  • the greater length of the suspension arms 62 is compensated by the higher position of the end pins with axial thrust bearings 63: the extended structure 64 of the cursor 65 increases the said longitudinal moment, which is counteracted by the reaction of the side member 60 connected to the cursor on the opposite side, the horizontal forces thereby generated by the moment being better supported by the guides 58.
  • the greater length of the arms 62 means that for a given vertical stroke there is a longer horizontal stroke of the blade-holder 41, or, vice-versa, for a given horizontal stroke there is a shorter vertical stroke; this has the effect of reducing the loads and therefore the associated moments and of increasing the working length of the horizontal stroke of the blades 44, immersed in the abrasive cutting fluid in the relative groove in the granite block 43.
  • roller bearings capable of absorbing axial loads D and E in Figure 24 reduces the effect of the transverse moment in the two directions, due to the effect of the lowering and raising of the mass of the blade-holder frame 41, even if there is no cross-beam connecting the cursors 65 or the extended structures 64.
  • the suspension arms 66 are coupled to the extensions 67 with end pins 54 of the known type, the connecting cross-beam providing stiffness to counter transverse moment, and the side members 69, carrying the shoe 72 sliding on the guides 70, counter the longitudinal moment by means of the connection of the shoe 72 on the side 61 of the column 48 on the opposite side.
  • the conformation of the said guides is clearly visible in Figure 20 where the fixed protective covering 71 completely cover the transverse abutment surface 78, whereas the longitudinal abutment surface 79 being inside the said guides are protected from the cutting fluid spray as in a labyrinth.
  • the suspension arms 81 are coupled to the internal extensions 82 with end pins 54 of the known type, the cross-beam 83, in this case positioned to the side of the said supports as is the front fixed cross-beam 49 to limit the height of the machine, ensures stiffness against the limited bending moment that is generated there due to the pins 54, the pins 52 and the internal guides 85 inside the columns 48 being co-planar; the presence of the internal side members 84, joining the internal extensions 82, counteract the longitudinal moments arising from the greater height of the said pins with respect to the internal shoes 87.
  • the conformation of the said internal guides 85 is illustrated in Figure 20.
  • the said guides, 85 on the internal side of the columns 48 may advantageously be protected by flexible flaps on either side, to cover the necessary opening between the fixed protective covering, 86 and the side of the column, which in the absence of the shoe, 87 lie directly on the U-shaped protective covering; the said shoe may have angled surfaces to favour the coupling with the said flexible flaps.

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

Claims (14)

  1. Bâti oscillant pour découpe de granit et de pierre en général, comportant un système pour rigidifier les curseurs, comprenant un châssis porte-lame (41), qui est fait osciller, par-dessus le bloc (43) en cours de traitement, au moyen de bras (53) suspendus sur des curseurs (55) coulissant dans des guides (58) ménagés dans les colonnes (48) de la machine, un mécanisme (42) pour transmettre un mouvement de va et vient audit châssis (41), des poutres transversales fixes (49) pour rigidifier les colonnes, caractérisé en ce que des organes latéraux (60, 69, 84) sont prévus pour rigidifier et joindre ensemble lesdits curseurs (55, 65) ou des structures de support (64, 67, 82) desdits bras de suspension et qui se déplacent verticalement avec ceux-ci, les organes avant étant joints aux organes arrière sur le même côté (61) de la machine.
  2. Bâti oscillant selon la revendication précédente, caractérisé en ce qu'une poutre transversale (56, 68, 83) est prévue pour joindre transversalement lesdits curseurs ou structures de supports et qui se déplace verticalement avec ceux-ci.
  3. Bâti oscillant selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits curseurs ou structures de support sont munis d'un prolongement vers le haut (64, 67, 82) permettant l'utilisation de longs bras de suspension (62, 66, 81), sans accroítre la longueur des guides ou la hauteur de la machine.
  4. Bâti oscillant selon la revendication 3, caractérisé en ce que lesdits curseurs ou structures de support sont joints au moyen de tiges de liaison et / ou de tirants sur le même côté (61) de la machine.
  5. Bâti oscillant selon la revendication 3, caractérisé en ce que lesdits curseurs ou structures de support sont joints au moyen de deux organes latéraux décalés verticalement sur le même côté (61) de la machine.
  6. Bâti oscillant selon la revendication 3, caractérisé en ce que lesdits curseurs ou structures de support sont joints au moyen d'une structure tridimensionnelle de rigidité sur le même côté (61) de la machine.
  7. Bâti oscillant selon l'une des revendications 1 ou 3, caractérisé en ce que lesdites broches d'oscillation (63, P) des bras (62), couplées aux curseurs ou structures de support (64), sont constituées par des roulements à rouleaux susceptibles de supporter une charge axiale (D, E).
  8. Bâti oscillant selon l'une quelconque des revendications précédentes, caractérisé en ce que les guides (70) sont positionnés sur le côté extérieur des colonnes (48) de la machine.
  9. Bâti oscillant selon l'une quelconque des revendications précédentes, caractérisé en ce que les guides (58, 70), les axes des colonnes (48) de la machine, les broches (52) couplant les bras (53, 62, 66, 81) au bâti (41), les broches (54, 63) couplant les bras et les curseurs (55) ou les prolongements (64, 67, 82) sont tous disposés dans le même plan vertical.
  10. Bâti oscillant selon l'une quelconque des revendications 1 à 7 ou 9 précédentes, caractérisé en ce que les guides (85) sont positionnés sur le côté intérieur des colonnes (48) de la machine.
  11. Bâti oscillant selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une poutre transversale (15, 27, 56, 68, 83), joignant les curseurs (16, 21, 26) ou les prolongements (55, 64, 67, 82), est positionnée latéralement relativement au plan vertical passant par les broches (12, 14, 25, 52, 54, 63) des bras de suspension (13, 20, 24, 53, 62, 66, 81).
  12. Bâti oscillant selon l'une quelconque des revendications précédentes, caractérisé en ce que les guides (28, 70, 85) sont couplés à un sabot (30, 72, 87) comportant une fente (35, 77) pour permettre le passage d'une couverture protectrice fixe (29, 71, 86).
  13. Bâti oscillant selon la revendication 12 précédente, caractérisé en ce que les guides (28, 70, 85) sont constitués par des sections fermement fixées sur une des surfaces latérales des colonnes (8, 48) de la machine, en faisant saillies à partir de ladite surface ; ladite couverture protectrice (29, 71, 86) ayant une section en forme de D avec les extrémités dirigées vers la surface de la colonne.
  14. Bâti oscillant selon l'une quelconque des revendications 12, 13 précédentes, caractérisé en ce que lesdits guides (28, 85), lorsqu'ils sont positionnés sur le côté intérieur des colonnes (8, 48), sont protégés par des volets flexibles sur les deux côtés, afm de couvrir l'ouverture nécessaire entre la couverture protectrice fixe (29, 86) et le côté de la colonne.
EP98919461A 1997-04-24 1998-04-21 Scie a cadre oscillant renforce destine a decouper des blocs de pierre Expired - Lifetime EP1011943B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
IT97MO000075 IT1292719B1 (it) 1997-04-24 1997-04-24 Telaio oscillante per il taglio di blocchi di granito e pietre in genere dotato di sistema di irrigidimento dei corsoi.
ITMO970076 1997-04-24
IT97MO000076 IT1292720B1 (it) 1997-04-24 1997-04-24 Telaio oscillante per il taglio di blocchi di granito e pietre in genere, dotato di corsoi e bracci pendolari perfezionati.
ITMO970075 1997-04-24
PCT/IT1998/000093 WO1998047680A1 (fr) 1997-04-24 1998-04-21 Scie a cadre oscillant renforce destine a decouper des blocs de pierre

Publications (2)

Publication Number Publication Date
EP1011943A1 EP1011943A1 (fr) 2000-06-28
EP1011943B1 true EP1011943B1 (fr) 2004-06-30

Family

ID=26331737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98919461A Expired - Lifetime EP1011943B1 (fr) 1997-04-24 1998-04-21 Scie a cadre oscillant renforce destine a decouper des blocs de pierre

Country Status (7)

Country Link
EP (1) EP1011943B1 (fr)
AT (1) ATE270175T1 (fr)
BR (1) BR9808694A (fr)
DE (1) DE69824864T2 (fr)
ES (1) ES2222585T3 (fr)
PT (1) PT1011943E (fr)
WO (1) WO1998047680A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102785296A (zh) * 2012-07-30 2012-11-21 溧阳市鸿岳机械制造有限公司 一种新型外墙保温板分锯机组

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1474299A (en) * 1922-01-21 1923-11-13 Stocq Edmond Device for driving stone and marble sawing blades
FR568970A (fr) * 1923-07-23 1924-04-04 Condensation Application Mec Armure de sciage pour blocs de marbre, de pierre, etc.
FR2519897A1 (en) * 1982-01-20 1983-07-22 Rocamat Sa Stone cutter with pendulum action - uses demountable couplings for blade holders to swing arms aiding holder replacement
IT1236877B (it) * 1989-11-22 1993-04-26 Telaio perfezionato per la segagione in lastre di blocchi di materiale lapideo.

Also Published As

Publication number Publication date
ATE270175T1 (de) 2004-07-15
BR9808694A (pt) 2000-10-03
ES2222585T3 (es) 2005-02-01
PT1011943E (pt) 2004-09-30
DE69824864T2 (de) 2005-08-11
EP1011943A1 (fr) 2000-06-28
WO1998047680A1 (fr) 1998-10-29
DE69824864D1 (de) 2004-08-05

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