EP1977858A1 - Système de rectification - Google Patents

Système de rectification Download PDF

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Publication number
EP1977858A1
EP1977858A1 EP07014468A EP07014468A EP1977858A1 EP 1977858 A1 EP1977858 A1 EP 1977858A1 EP 07014468 A EP07014468 A EP 07014468A EP 07014468 A EP07014468 A EP 07014468A EP 1977858 A1 EP1977858 A1 EP 1977858A1
Authority
EP
European Patent Office
Prior art keywords
grinding
openings
suction openings
suction
sanding
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
EP07014468A
Other languages
German (de)
English (en)
Other versions
EP1977858B1 (fr
Inventor
Uli Falk
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.)
UFI Schleiftechnik GmbH and Co KG
Original Assignee
UFI Schleiftechnik GmbH and Co KG
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 UFI Schleiftechnik GmbH and Co KG filed Critical UFI Schleiftechnik GmbH and Co KG
Publication of EP1977858A1 publication Critical patent/EP1977858A1/fr
Application granted granted Critical
Publication of EP1977858B1 publication Critical patent/EP1977858B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • 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

Definitions

  • the invention relates to a grinding system according to the preamble of claim 1.
  • the EP 1 074 347 A2 describes a grinding wheel for use in a grinding apparatus having a driving means for removing dust, wherein a number of dust discharge holes are arranged in a main body.
  • the dust discharge holes are arranged at intervals in the main body to drive the discharge of the dust generated during the grinding operation by the in cooperation with the dust discharge holes.
  • the provided in the main body Staubab technologicallöcher have no specially shaped edge areas, so that no aerodynamically favorable formation of Schleifstaubabsaug malbrechungen is obtained in order to optimize the air flow with the grinding dust can.
  • a plate-like grinding tool which has a support body with a plurality of passage openings and with a plurality of abrasive segments.
  • openings for the grinding dust provided, which are very large, so that the sanding dust can be sucked off without large residues.
  • the edge regions of the passage openings have edge regions which are sharp-edged, but not ground or chamfered, so that no aerodynamically favorable design of Schleifabsaug malbrechungen be created.
  • the abrasive body has a perforation which is approximately evenly distributed over the entire surface of the abrasive body or at least partially arranged and penetrates at least the abrasive layer having, wherein the distance of the individual, the perforations forming openings to each other and to the suction of the sanding pad or the Grinding plate is chosen so that a virtually dust-free transport of the grinding dust should be effected.
  • the grinding wheel according to the publication DE 21 45 714 A1 has on its entire surface a perforation forming holes which are regularly distributed over the entire surface and which communicate with the inside of the plate approximately radially extending channels and the other end opens to the outside.
  • DE 44 00 550 A1 is a sanding pad for a machine equipped with dust extraction work, in which the Absaug tellbrüche in the disk body end-side mouth areas have, the openings are widened, so that even with eccentrically placed sanding pads dust flow should be guaranteed.
  • the handle is arranged at the same time serving as a suction housing protective housing for drive members of the sanding pad, hollow and connected to the cavity of the protective housing.
  • the handle forms a discharge pipe for the grinding dust, attached to the free end of the suction hose, which extends away from the handle of the hand grinder.
  • a sanding pad for a dust extractor equipped sanding machine discloses the DE 89 02 423 U1 in which the disk body for Schleifstaubabsaugung with eight distributed on an inner circular line around the center, transverse to the disk body plane openings and eight formed on an outer circle around the center formed in the free surface of the disk body recesses formed over approximately radially extending channels with the periphery of the disk body and are connected to the perforations, is equipped, and to which a disc of abrasive cloth abrasive material can be attached, which has congruent to the openings on one of the circular lines holes, each distributed on the inner circular line arranged openings at the bottom of a second recess, which extends from the inner circular line to beyond a middle, third circular line out. This should be used discs of abrasive cloth any hole pattern.
  • the invention has for its object to provide a system of the type mentioned, which allows a quick and easy installation of the grinding wheel, without the risk of incorrect installation is given.
  • the invention is based on the idea that overlap areas between suction openings of the sanding disk and breakthroughs of the grinding wheel provide a suction effect.
  • the grinding wheel does not have to be fixed in an exact angular position.
  • the grinding wheel can be practical be mounted or attached in any angular position.
  • the suction holes created by the overlap provide the necessary suction effect, so that sanding dust is always sucked in.
  • An operator of the grinding machine does not have to worry about the position of the grinding wheel.
  • the inventive vote of both parts can always be done a good dust extraction.
  • one or more, in particular two concentric ring arrangements of suction openings and openings are present.
  • the suction openings are practically on hole circles.
  • a bolt circle of the sanding pad coincides with a pitch circle of the sanding disk.
  • the number of openings is equal to the number of suction openings. For each breakthrough, there is a corresponding suction opening, so that when all suction openings or openings are the same size, there is a simple overlap image. This effect is enhanced when the geometric shape and size of the apertures is equal to the geometric shape and size of the suction openings.
  • the apertures and the suction openings are elongate, for example elliptical.
  • a grinding wheel is easy to manufacture, on the other hand it is ensured that a minimum size of a suction hole created by the overlap is maintained. This ensures that a suction motor of the grinding machine is not overloaded.
  • the openings and the suction openings are angularly offset from each other in the opposite direction, in particular angularly offset by 90 °.
  • suction openings e.g. 50 - 70 suction openings.
  • the area of a suction opening is e.g. 0.3%, ie at most 0.5% of the total area of the grinding wheel. Due to the large number of suction openings a uniform suction is achieved.
  • Fig. 1 shows a plan view of a sanding pad 1 of a grinding system or a grinding machine, which is designed in particular as a hand grinder, but not shown in detail.
  • the sanding pad 1 is provided with suction openings 2 for sucking in sanding dust.
  • the suction openings are divided into two concentric ring arrangements or hole circles 3 and 4.
  • all suction ports 2 have the same size and have the same geometric shape. All suction openings 2 are elongate or elliptical here.
  • the inner circle of holes 3 has twenty openings, while the outer circle of holes has thirty four suction openings 2.
  • the suction openings are within a concentric ring 3 or 4 in each case far enough apart that this distance corresponds approximately to the length of the suction openings. An approximately equal distance can be assumed if the length deviates by a maximum of 25%.
  • the suction openings are also relatively small. For example, the area of a breakthrough is 1/300 of the surface of the sanding pad surface.
  • Fig. 1 shows further dimensions.
  • the diameter D of the center hole D is preferably 18 mm
  • the diameter of the inner hole circle 3 preferably 65 mm
  • the diameter of the outer hole circle 4 in particular 108 mm
  • the diameter of the grinding plate preferably 150 mm.
  • Fig. 2 illustrates the outer hole circle 4.
  • the angle ⁇ 1 between the suction openings is preferably 8 ° - 14 °, for example, 10.588 °.
  • This angle ⁇ 1 is smaller than the angle ⁇ 2 of the inner suction openings, which in Fig. 3 are shown separately.
  • the angle ⁇ 2 is in particular 15 ° -20 °, for example 18 °.
  • Fig. 4 the length L and width B of the elliptical suction openings is indicated.
  • the suction openings are inclined by 45 °, wherein the inclination direction of the inner suction openings is also rotated by 45 °, but in the opposite direction, so that the inner and outer suction openings are rotated by 90 ° to each other.
  • a grinding wheel 5 with breakthroughs 6 can be placed, as Fig. 5 shows. Front in the FIG. 5 the grinding wheel 5 can be seen, while behind the grinding wheel is arranged.
  • the grinding wheel 5 has a center hole 10 for fixing and is preferably made of abrasive paper. It can be fastened with Velcro, for example.
  • the apertures 6 of the grinding wheel 5 are designed to the suction openings 3 of the grinding disc 1, that regardless of a rotational position when placing the grinding wheel 5 is always an overlap of the suction openings 3 with the apertures 6 is present, so that rotational position independent holes 7 are formed by the the sanding dust can be sucked off.
  • the holes 7 serve as suction holes.
  • a suction hole is practically formed by the intersection of both openings (opening 6 and suction 2). The size of the effective suction opening 2 is thus reduced to the size of the suction hole or hole 7.
  • Sanding pad 1 and grinding wheel 5 have approximately the same hole structure, the direction of the suction openings 2 and apertures 6 runs opposite, as Fig. 5 shows.
  • the openings 6 are elliptical.
  • the number of openings 6 is equal to the number of suction openings 2. Their size, shape also agrees with that of the suction opening.
  • the breakthroughs and the suction holes are how Fig. 5 shows, mutually angularly offset by 90 ° in the opposite direction.
  • the hole spacing of holes in a ring arrangement or a pitch circle is chosen so that the overlapping of the grinding wheel on the sanding disc always results in the greatest possible overlap. As a result, regardless of the arrangement of the grinding wheel 5 on the sanding pad 1 is given a good suction.
  • Fig. 6-8 show variants of the hole arrangements, wherein it can be seen that the direction of the ellipses of both the grinding wheel 5 and the grinding plate can be different, but always a suction opening 2 is arranged at 90 ° angularly offset to its opening 6.
  • the invention thus provides an advantage by a much simpler handling for the user with a simultaneously ensured good dust extraction.
  • the holes can also have, for example, oblong rectangular shapes, another oval shape or other arrangements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Polarising Elements (AREA)
  • Disintegrating Or Milling (AREA)
EP07014468A 2007-04-02 2007-07-24 Système de rectification Not-in-force EP1977858B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202007004949U DE202007004949U1 (de) 2007-04-02 2007-04-02 Schleifsystem

Publications (2)

Publication Number Publication Date
EP1977858A1 true EP1977858A1 (fr) 2008-10-08
EP1977858B1 EP1977858B1 (fr) 2009-06-03

Family

ID=38170583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07014468A Not-in-force EP1977858B1 (fr) 2007-04-02 2007-07-24 Système de rectification

Country Status (3)

Country Link
EP (1) EP1977858B1 (fr)
AT (1) ATE432792T1 (fr)
DE (2) DE202007004949U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010012502U1 (de) 2010-09-13 2010-11-18 Robert Bosch Gmbh Schleifscheibe
DE102010003616A1 (de) 2010-04-01 2011-10-06 Robert Bosch Gmbh Haltekörper für flexibles Schleifmittel und Schleifsystem
DE102012216556A1 (de) 2011-09-20 2013-03-21 Robert Bosch Gmbh Haltekörper für flexibles Schleifmittel, Schleifsystem und Schleifgerät
GB2590707A (en) * 2019-12-23 2021-07-07 Black & Decker Inc Pole sander

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK178006B1 (da) * 2007-12-04 2015-03-02 Flex Trim As Slibeværktøj samt apparat til slibning af en overflade på pladeformede emner
CH709583B1 (de) 2011-12-31 2015-10-30 Saint Gobain Abrasives Inc Beschichtetes Schleifmittel.
DE102017216175A1 (de) 2017-09-13 2019-03-14 Robert Bosch Gmbh Schleifartikel
EP3812089A1 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2145714A1 (de) 1970-09-16 1972-03-23 SPAM, ViUe DAvray (Frank reich) Schleifwerkzeuge
US4616449A (en) 1984-08-31 1986-10-14 Miksa Marton Suction housing for vacuum sanding devices
DE8902423U1 (de) 1989-03-01 1989-06-29 Ihmels, Hartmut, 2905 Edewecht Schleifteller für eine mit Staubabsaugung ausgerüstete Schleifmaschine
DE4032069A1 (de) 1990-03-23 1991-09-26 Hans Rainer Nied Hand-schleifmaschine
EP0557773A1 (fr) 1992-02-27 1993-09-01 Robert Bosch Gmbh Disque support pour ponçage multi-couches
DE4400550A1 (de) 1994-01-11 1995-07-13 Koltec Ag Schleifschuh für eine mit Staubabsaugung ausgerüstete Arbeitsmaschine
EP1074347A2 (fr) 1999-07-29 2001-02-07 Ehwa Diamond Ind. Co., Ltd. Meule abrasive munie d'ailettes propulsives d'extraction de poussière
DE20105199U1 (de) 2001-03-26 2002-08-08 DIEWE-Diamantwerkzeuge GmbH, 86510 Ried Schleifwerkzeug
US20030003856A1 (en) * 2001-03-16 2003-01-02 Swei Gwo Shin Perforated sanding disc
US20030032383A1 (en) * 2001-08-10 2003-02-13 Nelson Eric W. Abrasive article with universal hole pattern

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2145714A1 (de) 1970-09-16 1972-03-23 SPAM, ViUe DAvray (Frank reich) Schleifwerkzeuge
US4616449A (en) 1984-08-31 1986-10-14 Miksa Marton Suction housing for vacuum sanding devices
DE8902423U1 (de) 1989-03-01 1989-06-29 Ihmels, Hartmut, 2905 Edewecht Schleifteller für eine mit Staubabsaugung ausgerüstete Schleifmaschine
DE4032069A1 (de) 1990-03-23 1991-09-26 Hans Rainer Nied Hand-schleifmaschine
EP0557773A1 (fr) 1992-02-27 1993-09-01 Robert Bosch Gmbh Disque support pour ponçage multi-couches
DE4400550A1 (de) 1994-01-11 1995-07-13 Koltec Ag Schleifschuh für eine mit Staubabsaugung ausgerüstete Arbeitsmaschine
EP1074347A2 (fr) 1999-07-29 2001-02-07 Ehwa Diamond Ind. Co., Ltd. Meule abrasive munie d'ailettes propulsives d'extraction de poussière
US20030003856A1 (en) * 2001-03-16 2003-01-02 Swei Gwo Shin Perforated sanding disc
DE20105199U1 (de) 2001-03-26 2002-08-08 DIEWE-Diamantwerkzeuge GmbH, 86510 Ried Schleifwerkzeug
US20030032383A1 (en) * 2001-08-10 2003-02-13 Nelson Eric W. Abrasive article with universal hole pattern

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010003616A1 (de) 2010-04-01 2011-10-06 Robert Bosch Gmbh Haltekörper für flexibles Schleifmittel und Schleifsystem
WO2011120740A1 (fr) 2010-04-01 2011-10-06 Robert Bosch Gmbh Corps de retenue pour moyen abrasif souple, et système abrasif correspondant
US9028301B2 (en) 2010-04-01 2015-05-12 Robert Bosch Gmbh Holding body for flexible grinding device and grinding system
DE202010012502U1 (de) 2010-09-13 2010-11-18 Robert Bosch Gmbh Schleifscheibe
WO2012034785A1 (fr) 2010-09-13 2012-03-22 Robert Bosch Gmbh Meule
DE102012216556A1 (de) 2011-09-20 2013-03-21 Robert Bosch Gmbh Haltekörper für flexibles Schleifmittel, Schleifsystem und Schleifgerät
WO2013041277A1 (fr) 2011-09-20 2013-03-28 Robert Bosch Gmbh Corps de retenue pour produit abrasif flexible, système de meulage et meuleuse
US10029349B2 (en) 2011-09-20 2018-07-24 Robert Bosch Gmbh Retaining body for flexible grinding means, grinding system and grinding tool
GB2590707A (en) * 2019-12-23 2021-07-07 Black & Decker Inc Pole sander

Also Published As

Publication number Publication date
DE202007004949U1 (de) 2007-06-06
DE502007000830D1 (de) 2009-07-16
ATE432792T1 (de) 2009-06-15
EP1977858B1 (fr) 2009-06-03

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