EP0974424A1 - Tête de rodage - Google Patents

Tête de rodage Download PDF

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Publication number
EP0974424A1
EP0974424A1 EP99830385A EP99830385A EP0974424A1 EP 0974424 A1 EP0974424 A1 EP 0974424A1 EP 99830385 A EP99830385 A EP 99830385A EP 99830385 A EP99830385 A EP 99830385A EP 0974424 A1 EP0974424 A1 EP 0974424A1
Authority
EP
European Patent Office
Prior art keywords
wheel
shaft
holder
vertical axis
head according
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Withdrawn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
EP99830385A
Other languages
German (de)
English (en)
Inventor
Roberto Signorini
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.)
Comes Srl
Original Assignee
Comes 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 Comes Srl filed Critical Comes Srl
Publication of EP0974424A1 publication Critical patent/EP0974424A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • 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

Definitions

  • the present invention refers to an improved lapping head, especially of the type comprising a plurality of grinding wheels having vertical axis.
  • the conventional lapping heads having wheels with vertical axis and being used for lapping or coarse-grinding stone materials comprise a plurality of abrasive wheels carried by relevant shafts whose axes, during operation, are vertically disposed, that is, substantially orthogonal to the surface of the material to be worked.
  • a drawback in the use of these known lapping heads lies in the fact that, in case of marked irregularities of the surface under formation, the wheels do not work simultaneously and their relevant axes do not result in vertical position as the roughness of the material tends to lift the same wheels which transit thereon, thereby moving them away from their relevant regions of intervention. Besides being a cause of imperfect working of the material, this is also a source of impacts and vibrations acting upon the mechanical and structural members of the head, and thus jeopardizing its reliability.
  • the main object of the present invention is to eliminate or at least reducing the above mentioned drawback.
  • the advantages deriving from the present invention lie essentially in that it is possible to ensure a perfect lapping of stone materials also when the surface to be treated exhibits marked irregularities or roughness; that an operating head according to the invention can also be used for surface finish operations by using wheels with fine-grain abrasive coating; that an operating head according to the invention is relatively simple to make, cost-effective and reliable even after a prolonged service life.
  • an operating head has a central shaft (1) with a flange (2) on top allowing the connection thereof to a machine by which it is driven into rotation (such a machine usually comprising a plurality of battery disposed lapping heads).
  • Solid and coaxial to said shaft (1) is a toothed bush (3) whose toothing is made to mesh with the corresponding inner toothing (4) of a coaxial crown (5) with which two elastic annular elements (6), coaxial to shaft (1), are associated on opposite sides.
  • the said crown (5) extends downwardly so as to engage a case (8) from the inside by screw means (7).
  • Said case (8) fully encloses the inner members of the head, is coaxial to the shaft (1) and moves along with the latter as it is driven by the element (5).
  • the lower base of said case (8) is made up of a flange (9) connected to the body via the same case so as to press, that is, pre-load, said elastic rings (6).
  • the presence of the elastic rings (6) allows the operating head to effectively absorb the axial and radial impacts taking place during operation and due to the contact between the abrasive wheels (19) and the roughness of the material under work.
  • the case (8) exhibits a plurality of seats for as many vertical axes (10) equally spaced apart from the main shaft (1) and intended to support the same abrasive wheels (19).
  • each of said wheel-holder shafts Solid and coaxial to each of said wheel-holder shafts is a gear (11) whose toothing is to mesh the corresponding toothing of a stationary crown (12) coaxial to the main shaft (1) and whose rotation is prevented by its being solid (through the body 14 and screws 13) with the machine to which the head is connected.
  • the wheels (11) roll around the crown (12) and each wheel-holder shaft (10) rotates about its vertical axis.
  • each wheel-holder shaft is driven into rotation about its own vertical axis and, at the same time, about the axis of shaft (1).
  • each wheel-holder shaft (10) is supported on top by a roller bearing (15) and below by a further roller bearing (16). Moreover, each wheel-holder shaft (10) is so mounted as to freely translate along its vertical axis, is associated to elastic means (18) - such as a spiral spring - and exhibits a stop rod (17) which limits the axial travel of the shaft (10) both downwards and upwards. More particularly, the upper part of the stop rod (17) is made to strike, upon reaching the end of its upward stroke, against the corresponding wall of the case (8) and, upon reaching the end of its downward stroke, against the surface of an axial ball bearing (20) located in correspondence of its lower portion. Resting upon a further axial ball bearing (21) is the lower base of the shaft (10).
  • the shafts (10) translate along their vertical axes, so as to elastically absorb the roughness and irregularities of the surface under treatment and to ensure no substantial oscillation of the whole operating head will take place, so that all the wheels (19) will result always adherent to the surface of the material under work.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Coating Apparatus (AREA)
  • Soil Working Implements (AREA)
  • Paper (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP99830385A 1998-07-22 1999-06-21 Tête de rodage Withdrawn EP0974424A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITFI980174 1998-07-22
IT000174 IT1304877B1 (it) 1998-07-22 1998-07-22 Testa levigatrice perfezionata

Publications (1)

Publication Number Publication Date
EP0974424A1 true EP0974424A1 (fr) 2000-01-26

Family

ID=11352634

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99830385A Withdrawn EP0974424A1 (fr) 1998-07-22 1999-06-21 Tête de rodage

Country Status (2)

Country Link
EP (1) EP0974424A1 (fr)
IT (2) ITFI980079U3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1477276A1 (fr) * 2003-05-16 2004-11-17 Mbd S.R.L. Tête de polissage pour dalles de pierre
WO2011090483A1 (fr) * 2010-01-22 2011-07-28 Amano Pioneer Eclipse Corporation Machine à poncer des surfaces et tête de ponçage associée
US8147297B2 (en) 2009-01-26 2012-04-03 Amano Pioneer Eclipse Corporation Surface grinding machine and grinding head therefor
WO2015044845A1 (fr) 2013-09-24 2015-04-02 Breton Spa Tête de rubanage orbitale pour pierre naturelle, aggloméré et matériaux en céramique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR627428A (fr) * 1925-09-22 1927-10-04 Machine à dresser et à polir
FR1208664A (fr) * 1958-11-14 1960-02-25 Appareil de polissage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR627428A (fr) * 1925-09-22 1927-10-04 Machine à dresser et à polir
FR1208664A (fr) * 1958-11-14 1960-02-25 Appareil de polissage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1477276A1 (fr) * 2003-05-16 2004-11-17 Mbd S.R.L. Tête de polissage pour dalles de pierre
US8147297B2 (en) 2009-01-26 2012-04-03 Amano Pioneer Eclipse Corporation Surface grinding machine and grinding head therefor
WO2011090483A1 (fr) * 2010-01-22 2011-07-28 Amano Pioneer Eclipse Corporation Machine à poncer des surfaces et tête de ponçage associée
WO2015044845A1 (fr) 2013-09-24 2015-04-02 Breton Spa Tête de rubanage orbitale pour pierre naturelle, aggloméré et matériaux en céramique
CN105555472A (zh) * 2013-09-24 2016-05-04 百利通有限公司 用于天然石材、团块材料和陶瓷材料的轨道研磨头

Also Published As

Publication number Publication date
ITFI980174A1 (it) 2000-01-22
IT1304877B1 (it) 2001-04-05
ITFI980079U3 (it) 2000-01-24

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