EP0141456A2 - Perforierte Säge zum Schneiden von Marmor, Granit und anderen ähnlichen Steinsorten unter Benutzung eines körnigen Schneidmaterials - Google Patents

Perforierte Säge zum Schneiden von Marmor, Granit und anderen ähnlichen Steinsorten unter Benutzung eines körnigen Schneidmaterials Download PDF

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Publication number
EP0141456A2
EP0141456A2 EP84201407A EP84201407A EP0141456A2 EP 0141456 A2 EP0141456 A2 EP 0141456A2 EP 84201407 A EP84201407 A EP 84201407A EP 84201407 A EP84201407 A EP 84201407A EP 0141456 A2 EP0141456 A2 EP 0141456A2
Authority
EP
European Patent Office
Prior art keywords
blade
grains
cutting
cavities
notches
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Withdrawn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
EP84201407A
Other languages
English (en)
French (fr)
Other versions
EP0141456A3 (de
Inventor
Walter Cado
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.)
Breton SpA
Original Assignee
Breton SpA
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 Breton SpA filed Critical Breton SpA
Publication of EP0141456A2 publication Critical patent/EP0141456A2/de
Publication of EP0141456A3 publication Critical patent/EP0141456A3/de
Withdrawn legal-status Critical Current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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/123—Details of saw blade body

Definitions

  • the present invention relates to blades used for the shot-blasting of marbles, granites or similar stones and intended to be driven by an alternating rectilinear or pendulum movement.
  • the pendulum movement of the blade determines an insertion of the grains between it and stone, these grains being subjected to an increasing compression force.
  • this force compresses a layer of grains in the process of disintegration as a result of the reduction of the space provided between the blade and the stone; the disintegration is favored by the very displacement of the blade which compresses an inhomogeneous layer and consequently not very effective, and which transmits the pressure to the stone.
  • This efficiency increases as the thickness of the layer decreases, and it reaches its maximum at mid-stroke, when the space between the blade and the stone corresponds to a single layer of grains. At this point the blade begins to rise and the pressure almost immediately ceases.
  • the useful part is limited to half of the central portion of each stroke of the blade, the pressure of this useful part going from 0 to a maximum to cancel out almost at once.
  • the time factor and therefore the useful working space are determined by the quantity of shot which creeps between the blade and the stone during each attack stroke and by the elasticity of the blade which delays the moment when the latter loses contact with the stone during the return race. It can be concluded that in this case also the efficiency of the cutting operation is reduced and that consequently the cutting operation turns out to be rather slow and difficult.
  • the present invention aims to improve this efficiency by making it constant over time and ultimately increasing the overall performance of the working machine.
  • This goal is achieved by providing recesses in the blade with inclined edges inside which the shot is inserted, thus evacuating the actual cutting surface and returning to it during the next working stroke, which ultimately gives rise to continuous renewal and constant pressure which improves the overall performance of the process, as tests have shown.
  • fig. 1 is shown in 1 a series of notches formed by superimposed rows in a blade 2; these notches 1 are arranged obliquely with respect to the axis of this blade 2, the obliquity being oriented opposite along the adjacent notches of the same row.
  • the superimposed rows are successively interested as the useful edge of the blade 2 wears.
  • the arrow 3 indicates the direction of movement of the blade 2 at the time taken into account and it can be seen that during cutting the abrasive grains penetrate into the notch referenced 4 of the lower row, while they leave the notch referenced 5 thus ensuring the continuous replacement of the grains which work along the sectioning line.
  • the notches, referenced 6 have an isosceles triangle profile which allows the grains to penetrate inside the cavities determined by those of these notches which are open at the lower edge of the blade. The grains enter along one side of each cavity and exit along the opposite side thereof, the situation being reversed when the longitudinal movement of the blade reverses itself.
  • the notches 6 are arranged in superimposed rows which come into action as the blade wears, it being observed that in order to save space the rows are offset axially to overlap each other other.
  • notches having a profile different from those illustrated in fig. 1 and 2, provided that the cavities thus determined have inclined edges which allow the entry of the shot on one side and the exit of this on another adjacent side, with inversion of the phenomenon at each change of direction of displacement of the blade. It is this arrangement which allows the replacement of the abrasive grains placed in the immediate vicinity of the cutting line, grains which are compressed between the blade and the bottom of the channel formed along the stone to be cut, which replacement has an obvious beneficial effect. at the level of the overall performance of the size job.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP84201407A 1983-10-10 1984-10-03 Perforierte Säge zum Schneiden von Marmor, Granit und anderen ähnlichen Steinsorten unter Benutzung eines körnigen Schneidmaterials Withdrawn EP0141456A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT85634/83A IT1175243B (it) 1983-10-10 1983-10-10 Lame con cavita' per il taglio con graniglia di pietre, marmi e graniti
IT8563483 1983-10-10

Publications (2)

Publication Number Publication Date
EP0141456A2 true EP0141456A2 (de) 1985-05-15
EP0141456A3 EP0141456A3 (de) 1986-02-26

Family

ID=11329335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201407A Withdrawn EP0141456A3 (de) 1983-10-10 1984-10-03 Perforierte Säge zum Schneiden von Marmor, Granit und anderen ähnlichen Steinsorten unter Benutzung eines körnigen Schneidmaterials

Country Status (4)

Country Link
EP (1) EP0141456A3 (de)
ES (1) ES281892Y (de)
IT (1) IT1175243B (de)
PT (1) PT79330B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2439291A (en) * 2006-06-24 2007-12-27 Brian Robshaw Reciprocating saw blade with apertures
WO2009124415A1 (zh) * 2008-04-09 2009-10-15 Wang Youkuan 石材锯条
EP2110194A2 (de) * 2008-04-14 2009-10-21 Irwin Industrial Tools GmbH Sägeblatt und Handsäge
WO2013026593A1 (de) * 2011-08-23 2013-02-28 Robert Bosch Gmbh Sägeblatt

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2431892B1 (es) * 2012-05-21 2014-09-10 Siti - B&T Group S.P.A. Aparato de corte para máquinas para cortar bloques de material esquistoso

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE65385C (de) * G. HAUN in Berlin S.W., Tempelhofer Ufer 23 Steinsäge
CH141107A (de) * 1929-08-09 1930-07-15 Heber Friedrich Sägeblatt.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE65385C (de) * G. HAUN in Berlin S.W., Tempelhofer Ufer 23 Steinsäge
CH141107A (de) * 1929-08-09 1930-07-15 Heber Friedrich Sägeblatt.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2439291A (en) * 2006-06-24 2007-12-27 Brian Robshaw Reciprocating saw blade with apertures
WO2009124415A1 (zh) * 2008-04-09 2009-10-15 Wang Youkuan 石材锯条
EP2110194A2 (de) * 2008-04-14 2009-10-21 Irwin Industrial Tools GmbH Sägeblatt und Handsäge
EP2110194A3 (de) * 2008-04-14 2011-09-28 Irwin Industrial Tools GmbH Sägeblatt und Handsäge
WO2013026593A1 (de) * 2011-08-23 2013-02-28 Robert Bosch Gmbh Sägeblatt

Also Published As

Publication number Publication date
ES281892U (es) 1985-05-01
ES281892Y (es) 1985-12-01
PT79330A (fr) 1984-11-01
EP0141456A3 (de) 1986-02-26
PT79330B (fr) 1986-08-19
IT8385634A0 (it) 1983-10-10
IT1175243B (it) 1987-07-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19880503

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Inventor name: CADO, WALTER