WO2020015858A1 - Lame diamant rainurée dotée de sections réalisées par frittage libre appliqué directement à l'aide d'un soudage laser - Google Patents

Lame diamant rainurée dotée de sections réalisées par frittage libre appliqué directement à l'aide d'un soudage laser Download PDF

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Publication number
WO2020015858A1
WO2020015858A1 PCT/EP2019/025223 EP2019025223W WO2020015858A1 WO 2020015858 A1 WO2020015858 A1 WO 2020015858A1 EP 2019025223 W EP2019025223 W EP 2019025223W WO 2020015858 A1 WO2020015858 A1 WO 2020015858A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
sections
sectors
grooved
diamond
Prior art date
Application number
PCT/EP2019/025223
Other languages
English (en)
Inventor
Denis CUSINATO
Original Assignee
Ferriera Di Cittadella 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 Ferriera Di Cittadella S.P.A. filed Critical Ferriera Di Cittadella S.P.A.
Publication of WO2020015858A1 publication Critical patent/WO2020015858A1/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
    • B28D1/12—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
    • B23D61/127—Straight saw blades; Strap saw blades of special material
    • 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
    • B23D61/14—Straight saw blades; Strap saw blades with inserted saw teeth, i.e. the teeth being individually inserted
    • 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
    • B23D65/00—Making tools for sawing machines or sawing devices for use in cutting any kind of material

Definitions

  • the present invention relates to a grooved, diamond blade with sections (or sectors) made by free-sintering applied directly using laser welding.
  • the present invention relates to a carbon steel grooved blade, wherein the sections (or sectors) are formed of bodies having a substantially parallelepiped shape, with the surface made abrasive by the presence of synthetic diamond granules; said sections (or sectors) are directly bonded to the lower surface of the grooved blade by laser welding.
  • a grooved blade of this type is especially suitable to be applied to machines that cut and square marble, granite and stone materials in general.
  • blades of the so-called“Fc grit” type, or smooth blades provided with diamond sections (or sectors) are traditionally used; these sections (or sectors) are anchored by hot brazing to the blades, which are moved by special single- or multi-blade machines.
  • the diamond blades on the market today define a structure of significant dimensions "referring to blade height”, on the surface of which sections (or sectors) are brazed made with “Hot-press” technology and with a Cobalt content close to 100%; these sections (or sectors) have a conical cross-section to operate the blade in a straight line with the cut.
  • the surface of the sections (or sectors) connected to the blade is made abrasive by the presence of granules of synthetic diamonds.
  • a traditional diamond blade thus comprises a steel plate-shaped body, which is generally reused by brazing the sections (or sectors) on it several times.
  • this well-known and widespread solution has major drawbacks.
  • the blades of this type in fact, show limits in terms of the absorption of vibrations caused by cutting stone and the stresses resulting from cutting actions, with the consequence of a limited operating capacity over time, sometimes accentuated by the fact that the abrasive sections (or sectors) can detach from the blade itself.
  • GB 1 206 736 refers to a diamond, grooved blade for cutting marble, granite and stone in general, comprising a plate shaped body constituting the blade. The lower edge of the latter bears multiple sections (or sectors) or teeth spaced apart, engaged with the blade-body, the surface of which is rendered abrasive by granules of synthetic diamonds; the cutting forces of the blade are appropriately distributed and the sections (or sectors) are suitably cooled according to the different operating conditions.
  • an abrasive tool such as a blade
  • the sections (or sectors) or teeth are made by free-sintering technology with metallic powders comprising Iron and non-ferrous materials such as Nickel or Cobalt and are directly bonded, i.e. without interposition of a neutral connection sector, to the blade-body by laser welding.
  • the purpose of the present invention is to overcome the drawbacks complained of above.
  • the object of the present invention is to provide a grooved, diamond blade having mechanical properties that allow an elastic modulus to be obtained suitable for the correct support and straightness of the multiple sections (or sectors).
  • a further object of the invention is to provide a grooved, diamond blade suitable to support the stresses from the cutting actions and to guarantee a reserve of tenacity for the absorption of vibrations from the cutting of the material.
  • a further purpose of the invention is to make available to users a grooved, diamond blade suitable to ensure a high level of resistance and reliability over time, in addition such as to be economically made.
  • figure 1 schematically shows, in an axonometric view, the grooved, diamond blade of the present invention, by way of example without the abrasive sections (or sectors);
  • figure 2 shows schematically, in an axonometric view, the same grooved blade with the abrasive sections (or sectors);
  • figure 3 schematically shows an axonometric view of a blade similar to that of figure 2, but reproduced at a different angle;
  • figure 4 schematically shows an enlarged axonometric view of one of the abrasive sections (or sectors) on the blades shown in figures 2 and 3;
  • figure 5 schematically shows, in an axonometric view, a part of the blade of the invention, combined with a conventional fitting attachment of said blade to the frame of the machinery performing the cutting and squaring of marble, granite and stone materials in general;
  • figure 6 schematically shows, in an axonometric and comparative view, the same part of the blade of the invention combined with the fitting attachment of said machinery according to the prior art
  • figure 7 schematically shows, in a lateral view, the blade of the invention under pre-tensioning conditions
  • figure 8 schematically shows, in a lateral view, the blade of the invention in the condition subsequent to its tensioning, to highlight the arch that it forms.
  • the diamond and grooved blade of the present invention comprises a plate-shaped body 12 constituting the blade-body, provided with opposite and known side attachments 26 for fitting to the frame of the machine (not illustrated); the body 12 defines a rectangular plan, with a maximum thickness of approximately between 2.5 and 6.0 mm and a height typically between 60 and 130 mm. The length of a blade of this type can reach and exceed five metres.
  • the body 12 is made of steel with a high carbon content, C40— C70, and along its lower edge 22 the sections (or sectors) or teeth 14 intended for cutting are bonded, the surface of which is rendered abrasive by the presence of granules of synthetic diamonds; one of said sections (or sectors) or teeth 14 with cutting part 18 defines, for example, a substantially parallelepiped shape and is illustrated in detail in Figure 4.
  • the sections (or sectors) or teeth 14 with the cutting part 18 bonded to the blade-body 12 are spaced apart depending on the type and properties of the stone material to be cut.
  • said sections (or sectors) 14 are made by free- sintering technology from a compacted set of different metal powders, including Iron and non-ferrous materials such as for example Nickel, Cobalt, Tungsten, Aluminium, Zinc, Copper, Chromium, Tin, Molybdenum, Vanadium, Niobium, Phosphorus, Boron, Silicon, Carbon, Magnesium and Manganese.
  • Iron and non-ferrous materials such as for example Nickel, Cobalt, Tungsten, Aluminium, Zinc, Copper, Chromium, Tin, Molybdenum, Vanadium, Niobium, Phosphorus, Boron, Silicon, Carbon, Magnesium and Manganese.
  • the concentration of Iron is higher than the upper part with the cutting part 18 of said sections (or sectors); said lower part or interface part 16 of the sections (or sectors) 14 in which the concentration of Iron is maximum, preferably with an addition of a very low percentage of Carbon, typically less than 0.1%, extends for the entire width and depth of said sections (or sectors) and for a height preferably between 0.1 and 2.5 mm.
  • the powder base material mix is typically formed of Iron, Nickel, Cobalt, Tungsten, Copper, Tin, Molybdenum, Manganese, Phosphorus, Carbon combined in various percentages and synthetic diamond granules.
  • the amount of Iron in the upper area with the cutting part 18 is limited with respect to the interface part 16 of the sections (or sectors) or teeth 14, where such metallic material is present in percentages ranging from 40% to 90% of the total mass.
  • the powder base material mixture of the interface portion 16 of the sections (or sectors) 14 comprises a percentage of metals selected from the following: Nickel, Cobalt, Tungsten, Aluminium, Zinc, Copper, Chromium, Tin, Molybdenum, Vanadium, Niobium, Phosphorus, Boron, Silicon, Carbon, Magnesium and Manganese; the percentage of said metals, used individually or in combination, is between 1 and 40% of the total mass.
  • the sections (or sectors) 14 are bonded to the body 12 or blade-body with high Carbon content by laser welding, made at their interface part 16 where the concentration of Iron additive with said very low percentage of Carbon is maximum.
  • the blade-body 12 is provided with grooves 20 made on at least one of the faces of said body and extending vertically; preferably, as schematically shown in Figures 1 to 3, the grooves 20 are made on both opposite faces of the blade-body 12 where they are offset from each other.
  • the grooves 20 have the function of allowing a better washing of the stone by the water which, during cutting, is appropriately conveyed and distributed, so as to ensure the correct cooling of said blade.
  • the grooves 20 do not extend for the entire height of the blade-body 12, but limit their extension and stop near its lower edge 22; in this way, said blade- body 12 maintains the greatest thickness along the entire area intended to accommodate the sections (or sectors) or teeth 14, with the consequence that the latter can be bonded by laser welding at any point of said edge 22, i.e. without the need to identify a preferred portion.
  • This is particularly useful, especially if there is a need to weld the sections (or sectors) 14 in such a position that they are close to each other and arranged, at least in part, in alignment with one or the other of the grooves 20.
  • the sections (or sectors) or teeth 14 are bonded to the blade-body 12 in an offset manner, i.e.
  • the blade as a whole can be advantageously limited in height to a height of between 60 and 130 mm, thus being significantly reduced in terms of size compared to traditional blades, with obvious advantages in terms of construction economies.
  • the edge 22 of the blade-body 12 also performs a further function, cooperating with the lateral attachment fitting of the blade-body 12 to the machine frame (not illustrated); such attachment, for example of the type with sheets or caulked plates, is indicated by reference numeral 26 in figures 1, 5 and 6 which schematically represent it by way of example along a single head of said blade-body.
  • the height of the blade-body 12 can advantageously be limited to a height between 60 and 130 mm, in the connection to the respective attachments 26 said blade can be decentralized, so as to be fixed according to an arrangement that shifts it upwards, as shown in figure 5. This leads to the formation of the so-called "arrow", i.e., a counterforce that determines the creation of a downwardly oriented arch of the blade body 12 during its tensioning (figure 8) and thus facilitates the cutting of the material.
  • arrow i.e., a counterforce that determines the creation of a downwardly oriented arch of the blade body 12 during its tensioning (figure 8) and thus
  • the decentralized arrangement of the blade- body 12 with respect to the lateral attachments can be obtained with a dovetail type constraint, or by means of pins inserted in the through hole (s) 28 (one of which schematically shown in figure 1) that stabilize said attachments with respect to the machine frame.
  • the arrows 30 shown in figures 5 and 6 schematically indicate the forces applied to the blade-body 12, which is tensioned by means of special hydraulic tensioners of the machine frame; said forces are generated by hydraulic systems such as cylinders and the like.
  • the provision of making grooves 20 with limited extension, in limited height on the blade-body 12 and interrupted near its lower edge 22, ensures that the latter constantly defines the longest thickness and in proximity to the entire area intended for laser welding bonding of the sections (or sectors) or teeth 14; furthermore, the fact that the teeth 14 protrude alternately towards the inside and outside of the lower edge 22 allows the blade-body 12 as a whole to more easily follow a straight trajectory during cutting.
  • the limited height which defines a lowered profile of the blade of the invention, also allows the blade to be decentralized with respect to the lateral supports 26, as well as to have available a disposable tool, with a weight lower than that of the prior blades; this allows the energy consumption of the multiblade machines during cutting operations and the costs for the disposal of said blades after use to be reduced.

Landscapes

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

Abstract

L'invention concerne une lame diamant rainurée (10) destinée à la coupe de blocs de marbre, de granit et de matériaux en pierre en général, comprenant un corps en forme de plaque ou un corps de lame (12) à haute teneur en carbone, dont le bord inférieur (22) est longé d'une pluralité de sections (ou secteurs) ou de dents (14) liées au laser et destinées à la coupe, espacées de manière appropriée et dont la surface est rendue abrasive par la présence de grains de diamant artificiel. Les sections (ou secteurs) (14) définissant la partie inférieure (16) ou une partie interface destinée à venir en prise avec ledit corps de lame (12) comprennent une partie supérieure ou partie de coupe contiguë (18), et sont fabriquées par une technologie de frittage libre à partir d'un ensemble compacté de poudres métalliques comprenant du fer et des matériaux non ferreux tels que le nickel, le cobalt, le cuivre, le molybdène, l'étain et le manganèse. Dans la partie inférieure (16) des sections abrasives (ou secteurs) (14) ou d'une partie interface où un soudage laser est effectué pour créer une liaison audit corps de lame (12), la concentration en fer est supérieure à la partie supérieure ou à la partie de coupe contiguë (18) desdites sections (ou secteurs).
PCT/EP2019/025223 2018-07-18 2019-07-11 Lame diamant rainurée dotée de sections réalisées par frittage libre appliqué directement à l'aide d'un soudage laser WO2020015858A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800007283 2018-07-18
IT102018000007283 2018-07-18

Publications (1)

Publication Number Publication Date
WO2020015858A1 true WO2020015858A1 (fr) 2020-01-23

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PCT/EP2019/025223 WO2020015858A1 (fr) 2018-07-18 2019-07-11 Lame diamant rainurée dotée de sections réalisées par frittage libre appliqué directement à l'aide d'un soudage laser

Country Status (1)

Country Link
WO (1) WO2020015858A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114227259A (zh) * 2021-12-24 2022-03-25 德正数控机床(宁波)有限公司 一种激光焊接及抛光一体机
CN118106630A (zh) * 2024-04-29 2024-05-31 深圳市佰石特石业有限公司 一种可适应大理石弧形表面切割的平台

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1206736A (en) 1968-04-20 1970-09-30 Winter & Sohn Ernst Improvements in or relating to saw blades
EP0925378A1 (fr) 1996-09-04 1999-06-30 Amic Industries Limited Fabrication d'un produit abrasif lie par un metal
WO2002000405A1 (fr) * 2000-06-28 2002-01-03 Ferriera Di Cittadella S.P.A. Lame coupante lineaire
EP1332822A1 (fr) * 2002-01-16 2003-08-06 Tyrolit Schleifmittelwerke Swarovski KG Scie à ruban
CN106964779A (zh) * 2017-04-10 2017-07-21 江苏锋泰工具有限公司 自发热式自由烧结金刚石刀头的制备方法
CN105039824B (zh) * 2015-06-25 2017-09-29 安泰科技股份有限公司 金刚石圆锯片刀头及其制备方法
US20180135259A1 (en) * 2015-04-17 2018-05-17 Cedima Diamantwerkzeug- Und Maschinenbaugesellschaft Mbh Sawing tool having a plurality of diamond saw blades for forming a surface structure on a road surface

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1206736A (en) 1968-04-20 1970-09-30 Winter & Sohn Ernst Improvements in or relating to saw blades
EP0925378A1 (fr) 1996-09-04 1999-06-30 Amic Industries Limited Fabrication d'un produit abrasif lie par un metal
WO2002000405A1 (fr) * 2000-06-28 2002-01-03 Ferriera Di Cittadella S.P.A. Lame coupante lineaire
EP1332822A1 (fr) * 2002-01-16 2003-08-06 Tyrolit Schleifmittelwerke Swarovski KG Scie à ruban
US20180135259A1 (en) * 2015-04-17 2018-05-17 Cedima Diamantwerkzeug- Und Maschinenbaugesellschaft Mbh Sawing tool having a plurality of diamond saw blades for forming a surface structure on a road surface
CN105039824B (zh) * 2015-06-25 2017-09-29 安泰科技股份有限公司 金刚石圆锯片刀头及其制备方法
CN106964779A (zh) * 2017-04-10 2017-07-21 江苏锋泰工具有限公司 自发热式自由烧结金刚石刀头的制备方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114227259A (zh) * 2021-12-24 2022-03-25 德正数控机床(宁波)有限公司 一种激光焊接及抛光一体机
CN118106630A (zh) * 2024-04-29 2024-05-31 深圳市佰石特石业有限公司 一种可适应大理石弧形表面切割的平台

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