EP1186379A2 - Dispositif de meulage et de ponçage de surface - Google Patents

Dispositif de meulage et de ponçage de surface Download PDF

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Publication number
EP1186379A2
EP1186379A2 EP01112054A EP01112054A EP1186379A2 EP 1186379 A2 EP1186379 A2 EP 1186379A2 EP 01112054 A EP01112054 A EP 01112054A EP 01112054 A EP01112054 A EP 01112054A EP 1186379 A2 EP1186379 A2 EP 1186379A2
Authority
EP
European Patent Office
Prior art keywords
pad
fact
holes
previous
disc
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.)
Granted
Application number
EP01112054A
Other languages
German (de)
English (en)
Other versions
EP1186379A3 (fr
EP1186379B1 (fr
Inventor
Bruno Oliosi
Claudio Mazzolini
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.)
Mazzolini Claudio
Original Assignee
Tholes 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 Tholes Srl filed Critical Tholes Srl
Publication of EP1186379A2 publication Critical patent/EP1186379A2/fr
Publication of EP1186379A3 publication Critical patent/EP1186379A3/fr
Application granted granted Critical
Publication of EP1186379B1 publication Critical patent/EP1186379B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material
    • B24D9/085—Devices for mounting sheets on a backing plate
    • 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
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/18—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/20—Mountings for the wheels

Definitions

  • the subject matter of the invention is a device for surface grinding and sanding through orbital rotating machines which consists in a pad, an abrasive disc to be fixed to the pad, tools to fix the pad to the orbital rotating machine, tools to fix abrasive disc to the pad.
  • these traditional devices consisting in a rigid disc on which is fixed a disc made up of soft damping material, by chemical physical adhesion, especially by gluing, are characterized by a low thermic conductivity, which leads to an insufficient cooling level of the pad and of the abrasive disc.
  • Heat generated during sanding activities can reach temperatures ranging from 80 to 90 ° C, leading to a rapid deterioration of gluing materials joining damping disc and rigid disc, as a consequence it is possible that the two discs come unstuck.
  • High temperatures reached while sanding also cause a rapid alteration of abrasive disc components, therefore frequent disc replacement become necessary and sanding machine inactivity periods increase.
  • a further inconvenient caused by traditional devices is the loading effect, due to the fact that sanding rests can just be eliminated through a limited number of holes. This effect creates a sanding rests layer on the abrasive disc surface which leads to a worsening in sanding machine performance and, most of all, to a further decrease of heat disposal.
  • Sanding rests are eliminated through suction, thanks to a suction casing enclosing the spindle and overlapping the pad on the opposite side of abrasive disc application surface.
  • the circumference of the above mentioned casing is large enough to overlap at least the area where through holes are located and, in pad operating position , it places itself with the opening edge at a minimum distance from the opposite side of the pad.
  • the space inside the casing is linked to whatever suction devices, such as suction pumps or devices creating depression through Venturi effect or similar.
  • the invention is based on the issue of creating a pad corresponding to the description here above and a support of an abrasive disc solving above mentioned inconveniences due to traditional devices through simple, cheap and fully effective devices, so that the pad itself can be replaced by well known traditional pads without any change to orbital rotating machines.
  • the invention solves the above mentioned problems thanks to a pad corresponding to the description here above and characterized by the fact that it includes at least some empty spaces.
  • This pad can be made in two separate parts on a plane which is perpendicular to the pad rotation axis and at least one of the two parts must include at least some empty spaces.
  • the pad being part of the invention is characterized by a certain number of through holes, whose centres are located on a circumference which is coaxial to the pad itself.
  • At least one of the two sides of the pad that is the side supporting the abrasive disc and/or the opposite side, can be equipped with several hole rows located on different circumferences.
  • the holes belonging to different coaxial rows can be radially lined up between them or can be radially staggered between them and they can have different diametres.
  • pad side opposite to the side supporting abrasive disc or where the abrasive disc is applied is equipped with just one through hole row located on a circumference corresponding to one of the through hole row circumferences on the pad side where the disc is fixed.
  • the two hole rows on the above mentioned two sides can be lined up, or partially or completely angularly staggered.
  • the pad can also be equipped with a central hole for suction or in case for fixing devices, such as through bolts or similar, to the spindle of a orbital rotating machine.
  • the central part of the pad in co-axial position to the pad itself, is equipped with a metal element, fixed or inserted or incorporated to the pad itself, in form of disc or non-round shaped extending on the opposite side of the pad in form of a stem or fixing axle to the spindle of a orbital rotating machine.
  • At least some of the holes are located in such a way to form couples of holes diametrically opposite one to the other.
  • the number of holes is variable and it can be identical or different for the two opposite sides which are transversal to the pad rotation axis.
  • the pad side supporting the abrasive disc is equipped with a variable number of holes, in particular ranging from 10 to 1.450.
  • the side parallel to the disc and opposite to the side where the abrasive disc is fixed is instead preferably equipped with a lower number of holes.
  • the creation of the pad at least partially empty gives the advantage of enhancing cooling effect, since during pad rotation air can circulate inside the pad both naturally and thanks to the use of forced ventilation devices or suction devices such as those here above described and widely used on well known orbital rotation machines.
  • Abrasive disc equipped with several holes whose diametre is considerably smaller than the diametre of traditional abrasive disc holes and whose disposition on the surface is appropriately conceived, gives the advantage of enhancing both sanding rests elimination and cooling effect, since air is distributed on all the holes.
  • a preferable practical form includes a combination of pad and abrasive disc as described here above, where both pad side where the abrasive disc is fixed and the abrasive disc itself are equipped with the same number of holes distributed on abrasive disc surface and on surface of abrasive disc adhesion to the pad, showing identical drawings.
  • the holes can have different dimensions radially located between them or according to sub-rows of the total amount of holes, being the diametre of the holes or hole sub-rows on the pad side where abrasive disc is fixed identical to the diametre of abrasive disc holes and to be fixed in coinciding position with the former.
  • An improvement enabling the correct coinciding position of the abrasive disc holes on the side of the pad equipped with the same kind of holes, is suggested by the invention by adding to the hole distribution drawing, as for hole location and dimension, hole combinations based both on lining up or location and on different hole dimension combination being immediately identifiable both on abrasive disc and on pad side and easily positioned in the correct coinciding position.
  • one of these combinations is characterized by a radial location of a certain number of holes, both on the disc and on the pad, being different dimension holes radially lined up at least for a part of the holes.
  • four holes, radially lined up, two of these, radially lined up in intermediate position, side by side, have a smaller diametre, while the radially more internal hole and the radially more external hole are larger, but their dimensions are different and respectively larger and intermediate referring to the dimension of smaller intermediate holes.
  • this project allows also the use of pads on which self-adhesive discs can be applied.
  • the surface of the side of this kind of pads must be featuring characteristics enabling the adhesive of the abrasive disc to grip, but at the same time the disc should also be easily removed. Due to their structure, this kind of surfaces usually do not allow the creation of micro-passages transversely to the pad axis and therefore in this case transversal flow distribution or compensation could not be guaranteed.
  • Picture N.1 shows a side view of the pad.
  • Picture N.2 shows an external front view of the pad side where abrasive disc is applied.
  • Picture N.3 shows a view from above on the external side of the pad side opposite to the one where the abrasive disc is fixed or applied.
  • Picture N.4 shows a side section of the "cup" shaped part of the pad.
  • Picture N.5 shows a front view of the internal side of the "cup" shaped part of the pad.
  • Picture N.6 shows a front view of the abrasive disc equipped with several holes.
  • Picture N.7 shows a view from above of a hole distribution drawing which is identical both for the abrasive disc and for the pad side where this abrasive disc is fixed.
  • Picture N.8 shows a view which is similar to picture N.7 of a further practical form.
  • the pad described by the invention consists in two parts 1, 2 separated on a plane which is perpendicular to the pad rotation axis and at least one of the two parts must include at least some empty spaces.
  • the empty part of the pad, "cup” shaped 1 consists in a disc made up, in particular but not restrictively, of plastic material, equipped with several through holes 601, whose centres are located on a circumference which is co-axial to the pad rotation axis.
  • the number of the above mentioned diametrical holes 601 can be nine or six, according to the pad type.
  • the peripheral side of the "cup” shaped part of the pad is equipped with a 301 small edge fit for fixing of closing disc 2 of the "cup” shaped part 1 of the pad, which has a ⁇ acute angle inclination as regards the pad plane.
  • the above mentioned edge 301 is equipped with a perimetral tooth 401 enabling the joint insertion of closing disc 2 into the "cup" shaped part 1 of the pad.
  • An insert 101 having a smaller diametre than the pad is fixed in the middle of the "cup” shaped part 1 of the pad, on the external surface.
  • the insert 101 in particular but not restrictively made up of metal, can be fixed in any way and in particular it can be incorporated in the material constituting the "cup" shaped part 1 of the pad.
  • the part of the metal insert 101 preferably round shaped, incorporated into the pad, extends on the external side of the "cup" shaped part 1 of the pad itself thanks to a connection stem 201 fit to be tightened or screwed or otherwise connected to a spindle or other connection devices with a rotating driving shaft of the pad itself.
  • the pad that is the "cup" shaped part
  • the pad can be equipped with a central through hole, in particular co-axial, enabling the fixing of the pad to the rotating driving shaft of the orbital rotation machine or to a spindle with a through bolt or similar. Both options are well known and currently used for pads.
  • the internal surface of the "cup" shaped part 1 of the pad is equipped with several projections or ribbings 501, located near diametrical holes 601 and/or by a more internal circumference and in the area of the central metal insert 101, having the function of enabling the leaning and/or further fixing of the closing disc 2 of the "cup" shaped part 1 of the pad.
  • Closing disc 2 of the "cup" shaped part 1 of the pad is equipped with several diametrical through holes 102, whose centres are located on three different circumferences which are co-axial between them and to the pad axis.
  • the number of holes forming these hole rows is not the same, and their angular positions do not correspond one to the other and moreover they are at least partially characterized by different diametres.
  • the two rows in more external position are formed by larger diametre holes, while the more internal row is formed by smaller diametre holes, on one row the centres of the above mentioned holes are located on the same circumference as the hole row 601 of the "cup" shaped part 1.
  • the hole row 102 of the closing disc 2 and 601 of the "cup” shaped part 1 can be lined up, or partially or completely angularly staggered.
  • closing disc 2 is equipped with a central hole 202, which is characterized by a considerably larger diametre, in detail about 1,5 times larger and preferably the double than the diametre of holes belonging to row 102.
  • Closing disc 2 102 holes on the same circumference as holes 601 of "cup" shaped part 1 of the pad have a smaller diametre than holes on the "cup" shaped part 1.
  • a damping material layer 302 consisting in particular in a soft and elastic material such as rubber, neoprene or similar.
  • the above mentioned layer is glued with a removable fixing material layer 402, named "velcro" and also definable as pull fixing and enabling the adhesion of the abrasive disc equipped with the complementary layer of the removable fixing mean, which usually consists in a cloth as velour or similar.
  • damping material layer 302 and in case the pull fixing material layer of the disc (velcro or similar) 402 are equipped with through holes corresponding to the holes of closing disc 2.
  • the two parts forming the pad, that is "cup" shaped part 1 and closing disc 2 are subsequently joined by the peripheral external tooth 401 of the "cup” shaped part 1 and by projections or ribbings 501 inside the "cup” shaped part 1 by physical chemical adhesion, in detail melding or gluing.
  • projections and ribbings 501 inside the "cup" shaped part 1 can also be equipped with an internal threaded hole, so that the pad closing cap can be fixed in a removable way with screws.
  • closing cap 2 too on the "cup" shaped part 1 of the pad is equipped with through holes level with projections or ribbing holes on "cup" shaped part 1.
  • closing cap on the "cup" shaped part 1 of the pad is at least partially covered with the damping layer 302 and in case with velcro layer or similar 402.
  • the pad can be adapted to several kind of discs, belonging both to the traditional type and to the new concept.
  • abrasive disc In order to improve sanding rests suction from abrasive disc 3, homogenizing suction effect on the surface of the disc itself and avoiding in this way inconveniences characterizing six or nine holes traditional abrasive discs, as above described, abrasive disc is equipped with several through holes 103.
  • holes 103 are appropriately distributed on abrasive disc surface, in detail, in an homogeneous way and hole diametre can range from a minimum of 0,5 mm and a maximum of 8 mm, and their density can range from 0,5 to 8 holes per square centimetre.
  • the surface of the abrasive disc being in contact with the pad is at least partially covered with a layer of cloth as velour or similar so that it can grip with the pad itself which is covered with a male layer consisting in pull closing material as velcro, as previously described referring to the pad itself.
  • velcro or similar material layer too is equipped with perforations level with the abrasive disc layer.
  • Abrasive disc parts covered with velcro are particularly helpful for dust transfer from abrasive discs parts not coinciding with holes to pad suction holes themselves, since the structure of pull fixing materials, as velcro, creates small hollow spaces enhancing air circulation for dust suction.
  • An abrasive disc equipped with several holes, uniformly distributed, avoids the problem of disc moving between pad suction holes and disc holes, frequently occurring with traditional abrasive discs, improving in this way dust suction.
  • a further benefit of this kind of abrasive disc consists in the improvement of elimination of heat generated during polishing or sanding, due to the fact that air suction occurs on the whole surface of the disc.
  • this picture illustrates a view from above of a hole distribution drawing which is identical both on the abrasive disc and at least on the pad side where abrasive disc is fixed.
  • This combination of pad and abrasive disc keeps in every possible combination or sub-combination all compatible characteristics previously described with examples, above described possible versions included.
  • the side of the pad where the abrasive disc is fixed and the abrasive disc itself have the same number of holes F which are distributed on the surface of the abrasive disc and of the side of the pad where the disc is fixed according to identical drawings or patterns.
  • F, F', F" holes can have different dimensions between them or according to sub-rows of the total number of holes. Holes or hole sub-rows on the side of the pad where abrasive disc is fixed having exactly the same diametres as the holes on the abrasive disc are to be fixed level with abrasive disc holes.
  • hole distribution drawing shows hole sub-combinations or sub-rows which are immediately identifiable both on abrasive disc and pad side.
  • the above mentioned sub-rows or combinations can be identified from the rest of the holes thanks to a particular distribution of the above mentioned holes between them both based on their disposition and dimension.
  • Hole sub-combinations or rows are also chosen in such a way to facilitate abrasive disc fixing in its correct position, that is the abrasive disc holes level with pad holes.
  • the example described illustrates a radial disposition of a certain number of holes, in detail 4 marked with 20 and present both on disc and pad, having the radially lined up holes different dimensions between them at least for a part of the holes themselves.
  • the example shows four holes, radially lined up, two of these, marked F holes, radially intermediate and side by side have a smaller diametre, while the radially more internal hole F' and the radially more external hole F" have larger dimensions, different one from the other and respectively larger and intermediate referring to the dimension of smaller intermediate holes.
  • Two or more similar or identical hole sub-combinations 20 are possible, for correct mutual positioning definition, in different points or different angular positions.
  • picture N.8 A further practical form is illustrated by picture N.8.
  • hole distribution is based on a pattern consisting in relatively small holes having substantially the same dimension and located at the crossing point of two groups of ideal parallel lines I, I' intersecting between them. Therefore, general hole disposition pattern, according to picture N.7 described a hole distribution on circles which were concentric with the pad circle in points of intersection with radius or diametres starting from this centre, while distribution pattern described in picture N.8 shows a hole distribution along quadrilaters, in detail ideal squares where the intersecting point of the diagonals coincides with the centre of the disc or of the pad.
  • the example in picture N.8 can include distribution irregularities as the one indicated by hole 21 and which is based on the same principle as sub-combination 20, that is the elimination of two adjacent holes along at least two adjacent ideal parallel lines and the replacement of these holes with one hole 21 located in intermediate position between the position of the two replaced holes and that is of the two lining up parallel lines. It is also possible to define other kinds of distribution unhomogeinities or irregularities according to other patterns.
  • hole sub-combination 20 consists in two larger diametre holes F', diametrically opposite lined up on the same diametre with F holes, 21 smaller diametre holes among which one hole 21 is located laterally staggered as regards the two lining up ideal intersecting lines crossing point in intermediate position between two lining up lines perpendicularly located as regards lining up diametre on which F' larger diametre holes are present, being left out the holes on crossing points of the above mentioned lining up lines perpendicularly located as regards lining up diametre marked by two larger diametre F' holes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Crushing And Grinding (AREA)
EP01112054A 2000-09-07 2001-05-25 Dispositif de meulage et de ponçage de surface Expired - Lifetime EP1186379B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000BO000520A ITBO20000520A1 (it) 2000-09-07 2000-09-07 Dispositivo per la smerigliatura e/o abrasione di superfici tramite macchine roto orbitali
ITBO000520 2000-09-07

Publications (3)

Publication Number Publication Date
EP1186379A2 true EP1186379A2 (fr) 2002-03-13
EP1186379A3 EP1186379A3 (fr) 2003-03-26
EP1186379B1 EP1186379B1 (fr) 2006-02-22

Family

ID=11438710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01112054A Expired - Lifetime EP1186379B1 (fr) 2000-09-07 2001-05-25 Dispositif de meulage et de ponçage de surface

Country Status (4)

Country Link
EP (1) EP1186379B1 (fr)
DE (1) DE60117316T2 (fr)
ES (1) ES2262575T3 (fr)
IT (1) ITBO20000520A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1666204A1 (fr) * 2004-11-17 2006-06-07 sia Abrasives Industries AG Produit abrasif
EP1775071A1 (fr) 2003-08-11 2007-04-18 UFI Schleiftechnik GmbH & Co. KG Disque abrasif pour machine à meuler
US8206511B2 (en) 2009-10-06 2012-06-26 Ecolab Usa Inc. Daily cleaner with slip-resistant and gloss-enhancing properties
USD686255S1 (en) 2011-05-25 2013-07-16 Saint-Gobain Abrasives, Inc. Abrasive disc with a distribution of holes
USD687471S1 (en) 2011-05-25 2013-08-06 Saint-Gobain Abrasives, Inc. Abrasive disc with a distribution of holes
USD689912S1 (en) 2011-05-25 2013-09-17 Saint-Gobain Abrasives, Inc. Abrasive disc with a distribution of holes
USD689913S1 (en) 2011-05-25 2013-09-17 Saint-Gobain Abrasives, Inc. Abrasive disc with a distribution of holes
US9920281B2 (en) 2009-11-12 2018-03-20 Ecolab Usa Inc. Soil resistant surface treatment
CN109202637A (zh) * 2017-06-29 2019-01-15 盖多·瓦伦蒂尼 抛光垫、背衬垫和手持式动力工具

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0821673A2 (pt) 2007-12-31 2015-06-16 Saint Gobain Abrasives Inc Almofada de interface destinada a ser usada entre um artigo abrasivo e uma ferramenta de suporte
US8585829B2 (en) 2010-12-13 2013-11-19 Ecolab Usa Inc. Soil resistant floor cleaner

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058936A (en) 1976-01-20 1977-11-22 Miksa Marton Vacuum sander
EP0404133B1 (fr) 1989-06-20 1994-04-13 Festo KG Dispositif de ponçage à sec de surfaces

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754359A (en) * 1970-09-16 1973-08-28 Spam D Avray Abrasion tools
US4616449A (en) * 1984-08-31 1986-10-14 Miksa Marton Suction housing for vacuum sanding devices
DE4032069A1 (de) * 1990-03-23 1991-09-26 Hans Rainer Nied Hand-schleifmaschine
DE4205977A1 (de) * 1992-02-27 1993-09-02 Bosch Gmbh Robert Schleifteller aus mehreren werkstoffschichten
DE29520566U1 (de) * 1995-12-29 1996-02-22 Jöst, Peter, 69518 Abtsteinach Direkt oder indirekt mit einer Maschine oder einem manuell betreibbaren Schleifmittelhalter adaptierbarer Schleifkörper sowie ein hierfür geeigneter Adapter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058936A (en) 1976-01-20 1977-11-22 Miksa Marton Vacuum sander
EP0404133B1 (fr) 1989-06-20 1994-04-13 Festo KG Dispositif de ponçage à sec de surfaces

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1775071A1 (fr) 2003-08-11 2007-04-18 UFI Schleiftechnik GmbH & Co. KG Disque abrasif pour machine à meuler
EP1666204A1 (fr) * 2004-11-17 2006-06-07 sia Abrasives Industries AG Produit abrasif
US8206511B2 (en) 2009-10-06 2012-06-26 Ecolab Usa Inc. Daily cleaner with slip-resistant and gloss-enhancing properties
US9920281B2 (en) 2009-11-12 2018-03-20 Ecolab Usa Inc. Soil resistant surface treatment
USD686255S1 (en) 2011-05-25 2013-07-16 Saint-Gobain Abrasives, Inc. Abrasive disc with a distribution of holes
USD687471S1 (en) 2011-05-25 2013-08-06 Saint-Gobain Abrasives, Inc. Abrasive disc with a distribution of holes
USD689912S1 (en) 2011-05-25 2013-09-17 Saint-Gobain Abrasives, Inc. Abrasive disc with a distribution of holes
USD689913S1 (en) 2011-05-25 2013-09-17 Saint-Gobain Abrasives, Inc. Abrasive disc with a distribution of holes
CN109202637A (zh) * 2017-06-29 2019-01-15 盖多·瓦伦蒂尼 抛光垫、背衬垫和手持式动力工具

Also Published As

Publication number Publication date
EP1186379A3 (fr) 2003-03-26
EP1186379B1 (fr) 2006-02-22
ITBO20000520A0 (it) 2000-09-07
DE60117316T2 (de) 2006-11-30
ES2262575T3 (es) 2006-12-01
DE60117316D1 (de) 2006-04-27
ITBO20000520A1 (it) 2002-03-07

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