EP0395162A1 - Werkzeug für die Arbeitsspindel von Poliermaschinen für Steinmaterial und dergleichen - Google Patents

Werkzeug für die Arbeitsspindel von Poliermaschinen für Steinmaterial und dergleichen Download PDF

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Publication number
EP0395162A1
EP0395162A1 EP90201013A EP90201013A EP0395162A1 EP 0395162 A1 EP0395162 A1 EP 0395162A1 EP 90201013 A EP90201013 A EP 90201013A EP 90201013 A EP90201013 A EP 90201013A EP 0395162 A1 EP0395162 A1 EP 0395162A1
Authority
EP
European Patent Office
Prior art keywords
tool
base
layer
interposed
elastic
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Withdrawn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
EP90201013A
Other languages
English (en)
French (fr)
Inventor
Mario Lucchesi
Giovanni Costantini
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.)
VINCENT SpA
Original Assignee
VINCENT 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 VINCENT SpA filed Critical VINCENT SpA
Publication of EP0395162A1 publication Critical patent/EP0395162A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D99/00—Subject matter not provided for in other groups of this subclass
    • B24D99/005—Segments of abrasive wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces
    • B24B41/0475—Grinding heads for working on plane surfaces equipped with oscillating abrasive blocks, e.g. mounted on a rotating head
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain

Definitions

  • This invention relates to a tool for the working heads of polishing machines for stone material and the like comprising a base and an abrasive layer supported by said base; said abrasive layer being formed of sintered diamond dust material, said base comprising means for fixing the tool to the working head of the polishing machine.
  • the stone material tool is mounted together with other identical tools on one of the working heads of the polishing machine.
  • the head subjects the tools to their cutting movement while the workpiece on the machine bench is advanced.
  • the tool abrasive layers are formed from a mixture of a binder (inert in the machining process) and a granular material (the bound material) which is active in the machining process.
  • the purpose of the inert material is to bind the granular material.
  • the purpose of the granular material is to abrade the surface being machined.
  • the inert material is chosen mainly on the basis of its tenacity, or its capacity to retain the abrasive granular material.
  • the abrasive material is chosen on the basis of its particle size and hardness and thus wear resistance, and its capacity to scratch the surface to be machined.
  • Tools comprising an abrasive layer of sintered diamond dust material and commonly known as “diamond-clad tools” are currently in use.
  • diamond-clad tools In contrast, the wear of diamond-clad tools is extremely limited in relation to the surface machined. In addition, this wear does not increase substantially even at cutting speeds considered to be high.
  • the material sintering ensures optimum tenacity in relation to the extreme hardness of the diamond dust.
  • diamond is not only extremely hard but is also extremely fragile, and therefore particularly sensitive to the impacts and microimpacts (vibration) deriving from the nature of the operation involved in polishing or facing stone material or the like, such as granite, stoneware, marble, marble agglomerate, glass ceramic and other materials of similar hardness and consistency.
  • the surfaces of the workpiece to be polished are rough and its edges are a source of impact with the tool when operating along them.
  • the object of the present invention is to obviate the aforesaid drawback.
  • a tool for the working heads of polishing machines for stone material or the like comprising a base and an abrasive layer supported by said base, said abrasive layer being formed of sintered diamond dust material, said base comprising means for fixing the tool to the working head of the polishing machine, characterised in that elastic means are interposed between said base and said means for fixing the tool to the working head.
  • the elastic means suitably reduce the rigidity of the connection between the working head which delivers the cutting force and the layer of abrasive material which transmits it to the surface of the workpiece being machined. They provide greater vibration absorption and softening of the impacts which the tool generates against the edges or any deep roughness of the workpiece.
  • the problem has been substantially solved by supporting the diamond cutter as rigidly as possible, ie by a method exactly the opposite to that proposed by the invention, in which the cutter is supported elastically.
  • the diamond-clad tool according to the invention offers its full advantage only if the machine using it is a high-precision machine and is mounted on as rigid supports as possible, to prevent the damping capacity of the tool being undermined by the lack of rigidity of the machine which, if not sufficiently rigid, would transmit its vibration to the tool.
  • the tool according to the invention can be in various forms, all of which have the following elements in common: a base 2, an abrasive layer 3, means for fixing the tool to the working head of the polishing machine, and elastic means interposed between the base 2 and said means for fixing the tool to the working head.
  • the means for fixing the tool to the working head comprise for example a dovetail support 4, and the elastic means comprise for example a layer 5 of rubber such as para rubber.
  • the abrasive material layer 3 is made to adhere to the respective surface of the base 2 for example by sintering or cementing.
  • the base 2 can be joined to the dovetail support 4 by vulcanizing or cementing the interposed rubber layer (see Figures 1, 4, 5, 6), or by screw means as shown in Figures 2 and 3.
  • Figure 2 shows a single series of socket head screws 6 whereas Figure 3 shows two series of screws 7.
  • One of the two series of screws 7 can be arranged quincunx to the remainder.
  • the use of screws means that the rubber layer 5 can be prestressed according to the rigidity/elasticity required of the tool 1 on the basis of the working parameters.
  • the screws 6 and 7 also constitute centering means for the base 2 and therefore for the abrasive layer 3 about the support 4 and thus about the working head of the machine (not shown). If screws are not provided, centering can be achieved by mutually engaging male and female elements.
  • the male element and female element comprise respectively at least one rib 8 and at least one recess 9 extending along the longitudinal axis 10 of the tool and having a trapezoidal cross-section.
  • the rubber layer 5 is usually interposed between the rib 8 and recess 9.
  • tool centering means shown therein are formed by sawtoothing the surfaces along which the base 2 engages the dovetail support 4.
  • the base 2 comprises substantially a first and a second portion.
  • the first portion supports the abrasive sintered material layer 3 whereas the second portion is associated with means for fixing the tool 1 to the working head.
  • the tool fixing means, ie the dovetail support 4, and the elastic means, ie the rubber layer 5, can be formed as a single block 4-5 of elastic material, such as para rubber or another rubber generally having a coefficient of elasticity which varies according to the position within the block.
  • the material is of substantially greater rigidity and hence of greater coefficient of elasticity at the outer portions and in particular the portions about the support 4, whereas it is of lesser rigidity and thus of lesser coefficient of elasticity in the core and in proximity to the surface along which it joins to the base 2.
  • the materials used to form the base 2 and dovetail support in the case of the tools of Figures 1 to 6 can be either metal or plastics. In the former case the metals used to best effect are bronze or steel in general.
  • the abrasive layer 3 of each tool of Figures 1 to 7 is formed by sintering diamond dust in metal alloy or by dispersing diamond dust in a mixture of hardening resins.
  • the thickness of the abrasive layer 3 varies between 3 and 5 mm.
  • the tool is arranged together with other similar tools radially on a working head which drives it with a first translational movement along a circular trajectory perpendicular to its longitudinal axis 10 and a simultaneous second oscillation movement about said longitudinal axis 10 so that the entire arched surface of the abrasive layer 3 interferes with the surface of the workpiece being machined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP90201013A 1989-04-27 1990-04-23 Werkzeug für die Arbeitsspindel von Poliermaschinen für Steinmaterial und dergleichen Withdrawn EP0395162A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8920288A IT1230092B (it) 1989-04-27 1989-04-27 Utensile per teste operatrici di macchine levigatrici di materiali lapidei o simili.
IT2028889 1989-04-27

Publications (1)

Publication Number Publication Date
EP0395162A1 true EP0395162A1 (de) 1990-10-31

Family

ID=11165457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90201013A Withdrawn EP0395162A1 (de) 1989-04-27 1990-04-23 Werkzeug für die Arbeitsspindel von Poliermaschinen für Steinmaterial und dergleichen

Country Status (2)

Country Link
EP (1) EP0395162A1 (de)
IT (1) IT1230092B (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2663578A1 (fr) * 1990-06-22 1991-12-27 Toncelli Dario Porte-outil oscillant pour ponceuse.
EP0691182A3 (de) * 1994-07-08 1996-03-20 Veglio Hs Srl Einsatzteil eines Schleifwerkzeuges für einen rotierenden Schleifkopf mit schwingenden Schleifsteinen
US5567503A (en) * 1992-03-16 1996-10-22 Sexton; John S. Polishing pad with abrasive particles in a non-porous binder
WO2000030812A1 (en) * 1998-11-25 2000-06-02 Repla S.R.L. Abrasive tool for smoothing machines
EP1025957A2 (de) * 1999-02-05 2000-08-09 Vittorio Paretti Werkzeugmaschine zum Bearbeiten von Gestein und Agglomeraten von inerten Materialen
EP1046467A1 (de) * 1999-04-16 2000-10-25 F.I.M.A.D. s.r.l. Poliermaschine mit einem Drehkopf der eine Vielzahl von Poliersektoren mit segmentierten und elastischen Strukturen trägt
ITVR20080130A1 (it) * 2008-11-24 2010-05-25 Aros Srl Utensile a tasselli per la levigatura o la lucidatura di superfici non piane di materiali lapidei
ITMI20090091A1 (it) * 2009-01-27 2010-07-28 Leg Italia S R L Dispositivo di supporto per un utensile abrasivo e correlato utensile abrasivo
CN101823241A (zh) * 2010-04-21 2010-09-08 长沙石立超硬材料有限公司 一种金属结合剂金刚石磨块及其制备方法
ITVI20120295A1 (it) * 2012-10-31 2014-05-01 Premier S R L Elemento abrasivo per frese fickert e procedimento di produzione di un elemento abrasivo per frese fickert
ITUB20155371A1 (it) * 2015-11-09 2017-05-09 Ditech S R L Utensile per la lucidatura di manufatti ceramici e/o pietre naturali
ITUA20163126A1 (it) * 2016-05-04 2017-11-04 Abrasivi Adria S R L Utensile abrasivo per la lavorazione di materiali lapidei, ceramici o simili.
IT201900000669A1 (it) 2019-01-16 2020-07-16 Diatex Spa Utensile abrasivo diamantato circolare per la lavorazione della superficie di materiali ceramici

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267938A (en) * 1940-09-30 1941-12-30 R J Read Reehive device
US2823496A (en) * 1953-03-16 1958-02-18 Otto W Winter Grinding devices
US3464166A (en) * 1967-05-23 1969-09-02 Ferro Corp Polishing plate
FR2287968A1 (fr) * 1974-10-19 1976-05-14 Schleifmittelwerk Bietigheim E Corps pour usinage par abrasion
DE2922776A1 (de) * 1979-06-05 1980-12-11 Walter Hunger Honstein

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267938A (en) * 1940-09-30 1941-12-30 R J Read Reehive device
US2823496A (en) * 1953-03-16 1958-02-18 Otto W Winter Grinding devices
US3464166A (en) * 1967-05-23 1969-09-02 Ferro Corp Polishing plate
FR2287968A1 (fr) * 1974-10-19 1976-05-14 Schleifmittelwerk Bietigheim E Corps pour usinage par abrasion
DE2922776A1 (de) * 1979-06-05 1980-12-11 Walter Hunger Honstein

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2663578A1 (fr) * 1990-06-22 1991-12-27 Toncelli Dario Porte-outil oscillant pour ponceuse.
US5567503A (en) * 1992-03-16 1996-10-22 Sexton; John S. Polishing pad with abrasive particles in a non-porous binder
EP0691182A3 (de) * 1994-07-08 1996-03-20 Veglio Hs Srl Einsatzteil eines Schleifwerkzeuges für einen rotierenden Schleifkopf mit schwingenden Schleifsteinen
WO2000030812A1 (en) * 1998-11-25 2000-06-02 Repla S.R.L. Abrasive tool for smoothing machines
EP1025957A3 (de) * 1999-02-05 2001-10-10 Vittorio Paretti Werkzeugmaschine zum Bearbeiten von Gestein und Agglomeraten von inerten Materialen
EP1025957A2 (de) * 1999-02-05 2000-08-09 Vittorio Paretti Werkzeugmaschine zum Bearbeiten von Gestein und Agglomeraten von inerten Materialen
EP1046467A1 (de) * 1999-04-16 2000-10-25 F.I.M.A.D. s.r.l. Poliermaschine mit einem Drehkopf der eine Vielzahl von Poliersektoren mit segmentierten und elastischen Strukturen trägt
ITVR20080130A1 (it) * 2008-11-24 2010-05-25 Aros Srl Utensile a tasselli per la levigatura o la lucidatura di superfici non piane di materiali lapidei
ITMI20090091A1 (it) * 2009-01-27 2010-07-28 Leg Italia S R L Dispositivo di supporto per un utensile abrasivo e correlato utensile abrasivo
WO2010086801A1 (en) * 2009-01-27 2010-08-05 Leg Italia S.R.L. Supporting device for an abrasive tool and corresponding abrasive tool
CN101823241A (zh) * 2010-04-21 2010-09-08 长沙石立超硬材料有限公司 一种金属结合剂金刚石磨块及其制备方法
ITVI20120295A1 (it) * 2012-10-31 2014-05-01 Premier S R L Elemento abrasivo per frese fickert e procedimento di produzione di un elemento abrasivo per frese fickert
ITUB20155371A1 (it) * 2015-11-09 2017-05-09 Ditech S R L Utensile per la lucidatura di manufatti ceramici e/o pietre naturali
ITUA20163126A1 (it) * 2016-05-04 2017-11-04 Abrasivi Adria S R L Utensile abrasivo per la lavorazione di materiali lapidei, ceramici o simili.
IT201900000669A1 (it) 2019-01-16 2020-07-16 Diatex Spa Utensile abrasivo diamantato circolare per la lavorazione della superficie di materiali ceramici

Also Published As

Publication number Publication date
IT8920288A0 (it) 1989-04-27
IT1230092B (it) 1991-10-05

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