EP0234583A2 - Structure d'une meule cylindrique pour têtes de polissage, en particulier pour pierres, marbres, granit et similaire - Google Patents

Structure d'une meule cylindrique pour têtes de polissage, en particulier pour pierres, marbres, granit et similaire Download PDF

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Publication number
EP0234583A2
EP0234583A2 EP87102750A EP87102750A EP0234583A2 EP 0234583 A2 EP0234583 A2 EP 0234583A2 EP 87102750 A EP87102750 A EP 87102750A EP 87102750 A EP87102750 A EP 87102750A EP 0234583 A2 EP0234583 A2 EP 0234583A2
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
supporting element
cylindrical grinding
cylindrical
axis
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Withdrawn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
EP87102750A
Other languages
German (de)
English (en)
Other versions
EP0234583A3 (fr
Inventor
Sergio Gassani
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.)
MARMOTECNICA MILANO Srl
Original Assignee
MARMOTECNICA MILANO Srl
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 MARMOTECNICA MILANO Srl filed Critical MARMOTECNICA MILANO Srl
Publication of EP0234583A2 publication Critical patent/EP0234583A2/fr
Publication of EP0234583A3 publication Critical patent/EP0234583A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/02—Wheels in one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings

Definitions

  • the present invention relates to a structure of a cylindrical grinding wheel for honing heads, particularly for stones, marble, granite and the like.
  • cylindrical grinding wheels are used which are provided with a substantially horizontal axis and which rotate around their own axis and around a vertical axis.
  • such cylindrical grinding wheels comprise a supporting bush which extends around the axis of the grinding wheel and is provided, at said axis, with an engagement seat for accommodating a wheel-bearing shaft of the honing head.
  • the supporting bush is provided, on its lateral surface, with a plurality of dovetail sliding seats which extend parallel to the axis of the grinding wheel, each accommodating a small block which supports a cylindrical sector of abrasive material.
  • the particular configuration of the supporting bush and of the small blocks forces the individual formation of the abrasive material in cylindrical sectors on each block, and thus implies high manufacturing costs.
  • the grinding wheel is composed of a composite structure, there is the possibility of an axial sl.ippage of the small blocks, with the cylindrical sectors of abrasive material, from the supporting bush particularly in the case of high operating speeds of the honing head.
  • the main aim of the present invention is to eliminate the above described disadvantages, by providing a cylindrical grinding wheel provided with such a structure as to allow a simpler and more economical manufacturing and to offer a greater resistance to the stresses to which it is subject during operation.
  • an object of the invention is to provide a grinding wheel which reduces the interventions for maintenance on the honing heads.
  • Another object of the invention is to provide a grinding wheel which simplifies the operations of assembly and disassembly on the honing head.
  • a structure of a cylindrical grinding wheel for honing heads particularly for stones, marble, granite and the like, characterized in that it comprises a supporting element made of one piece and extending around the axis of the grinding wheel, said supporting element defining, coaxially to said axis, an engagement seat for a wheel-bearing shaft of a honing head and being provided with a lateral surface rigidly coupled to the abrasive material portion of the grinding wheel.
  • the structure of a grinding wheel according to the invention comprises a supporting element 2 which extends around the axis of the grinding wheel and it is made of one piece, e.g. by injection of thermoplastic material in a specific mold.
  • the supporting element 2 defines an engagement seat 3 which is coaxial to the axis of the grinding wheel and can be coupled with one of the wheel-bearing shafts of a honing head.
  • the engagement seat is provided, proximate to its end complementary to the free end of the wheel-bearing shaft, with a threading 4 substantially composed of a projection having a rectangular cross section and extending for at least one turn of helix on the surface of the engagement seat and which can be obtained directly during the injection molding of the supporting element.
  • the threading 4 will have a direction of threading, on the complementary threading provided on the wheel-bearing shaft, which is opposite to the direction of rotation of said shaft during its operation.
  • the supporting element is provided with a substantially cylindrical configuration, with a plurality of undercut expansions 5 which extend radially on its lateral surface. Said expansions are T-shaped, with the base directed towards the axis of the grinding wheel and extend axially for the entire length of the supporting element so as to firmly engage the abrasive material 6 which surrounds it.
  • At least one stiffening ridge 7 is provided, which extends circumferentially on the lateral surface, intersecting the plurality of undercut expansions 5.
  • the abrasive material which is formed directly on the supporting element so as to adhere to its lateral surface when drying, can in turn be made of one piece and be provided, on its lateral surface, with a plurality of grooves 9 which extend radially towards the axis of the grinding wheel.
  • the manufacturing and the assembling of the grinding wheel, having the structure according to the invention, are as follows.
  • the supporting element 2 is made of thermoplastic material by injection molding and subsequently the abrasive material is cast on the supporting element by using a cylindrical boxing provided with radial dividing walls, said material being composed, e.g., of carborundum, magnesite, magnesium chloride and stabilizing agents with the possible addition of phenolic resins.
  • the abrasive material makes contact with the lateral surface of the supporting element and, while drying, with the possible passage in an oven if phenolic resins have been added, due to the shrinkage, tightens around the supporting element, tightly adhering thereto.
  • the grinding wheel can be mounted on the wheel-bearing shaft of a honing head simply by making use of the threading 4.
  • the grinding wheel having the structure according to the invention, fully achieves the intended aim, since it can be obtained with a much lower cost than the grinding wheels of the known kind, and since it has, with respect to the latter, a much greater coupling section of the abrasive material to the supporting element thus having a greater resistance and a longer life.
  • a further advantage is that of having an extremely simple and quick assembling, which can be completed with minimal slack between the wheel-bearing shaft and the grinding wheel to contain the vibrations during operation.
  • the grinding wheel according to the invention designed in particular for operations of roughing, semifinishing and finishing, depending on the granulation of the abrasive material, for stones, marble and granite, can also be used for the machining of metallic materials.
  • the materials employed may be any according to the requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP87102750A 1986-02-28 1987-02-26 Structure d'une meule cylindrique pour têtes de polissage, en particulier pour pierres, marbres, granit et similaire Withdrawn EP0234583A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2108286U 1986-02-28
IT2108286U IT209729Z2 (it) 1986-02-28 1986-02-28 Struttura di mola cilindrica per teste di levigatura, particolarmente per pietre, marmo, granito e simili.

Publications (2)

Publication Number Publication Date
EP0234583A2 true EP0234583A2 (fr) 1987-09-02
EP0234583A3 EP0234583A3 (fr) 1989-11-08

Family

ID=11176470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102750A Withdrawn EP0234583A3 (fr) 1986-02-28 1987-02-26 Structure d'une meule cylindrique pour têtes de polissage, en particulier pour pierres, marbres, granit et similaire

Country Status (2)

Country Link
EP (1) EP0234583A3 (fr)
IT (1) IT209729Z2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996020070A1 (fr) * 1994-12-24 1996-07-04 Schleifmittel-Werk Karl-Seiffert Gmbh & Co. Zones recyclables de meules

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1954560A (en) * 1930-12-29 1934-04-10 Cunningham Archibald Grinding wheel mounting
FR815703A (fr) * 1935-12-30 1937-07-21 Carborundum Co Meules segmentaires perfectionnées et procédé pour les fabriquer
DE1905892A1 (de) * 1968-02-03 1969-10-16 Silvio Para Schleifscheibe,versehen mit speziellen Anschluss- und Festspannorganen,und betreffendes Herstellungsverfahren
FR2229504A1 (fr) * 1973-05-14 1974-12-13 Karlstad Mekaniska Ab

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1954560A (en) * 1930-12-29 1934-04-10 Cunningham Archibald Grinding wheel mounting
FR815703A (fr) * 1935-12-30 1937-07-21 Carborundum Co Meules segmentaires perfectionnées et procédé pour les fabriquer
DE1905892A1 (de) * 1968-02-03 1969-10-16 Silvio Para Schleifscheibe,versehen mit speziellen Anschluss- und Festspannorganen,und betreffendes Herstellungsverfahren
FR2229504A1 (fr) * 1973-05-14 1974-12-13 Karlstad Mekaniska Ab

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996020070A1 (fr) * 1994-12-24 1996-07-04 Schleifmittel-Werk Karl-Seiffert Gmbh & Co. Zones recyclables de meules

Also Published As

Publication number Publication date
IT8621082V0 (it) 1986-02-28
EP0234583A3 (fr) 1989-11-08
IT209729Z2 (it) 1988-10-24

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Inventor name: GASSANI, SERGIO