EP4395961A1 - Disque de broyage pour un dispositif de broyage et système de broyage - Google Patents

Disque de broyage pour un dispositif de broyage et système de broyage

Info

Publication number
EP4395961A1
EP4395961A1 EP22772427.5A EP22772427A EP4395961A1 EP 4395961 A1 EP4395961 A1 EP 4395961A1 EP 22772427 A EP22772427 A EP 22772427A EP 4395961 A1 EP4395961 A1 EP 4395961A1
Authority
EP
European Patent Office
Prior art keywords
grinding
sanding
openings
dust
fastening
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.)
Pending
Application number
EP22772427.5A
Other languages
German (de)
English (en)
Inventor
Markus Haberer
Frank SIEBERT
Michael Irmler
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.)
Tts Microcell GmbH
Original Assignee
Tts Microcell GmbH
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 Tts Microcell GmbH filed Critical Tts Microcell GmbH
Publication of EP4395961A1 publication Critical patent/EP4395961A1/fr
Pending legal-status Critical Current

Links

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
    • 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
    • B24D7/10—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 with cooling provisions
    • 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
    • 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools

Definitions

  • the invention relates to a sanding disc for a sanding device, with a fastening interface formed on the side of the sanding disc facing the sanding device for non-rotatable attachment to a driven member of the sanding device, such that the sanding disc, which is delimited by a peripheral face of the disc edge, in a grinding movement suitable for grinding a workpiece can be driven, with the grinding disc having a fastening surface on a working side axially opposite the side of the device, to which an abrasive provided with an abrasion layer can be detachably fastened or is fastened via fastening means, the grinding disc dust extraction openings arranged on the fastening surface and air suction openings arranged on the plate edge surface, each of which has a suction channel system running in the sanding plate with dust outlet arranged on the device side of the sanding plate öf fn 11, are connected, so that grinding dust produced during grinding can be removed by means of a dust
  • the object of the invention is to create a sanding disc of the type mentioned at the outset, with which the dust extraction of sanding dust produced during sanding can be optimized.
  • peripheral air intake openings are designed for complete decoupling from the dust extraction ducts on the mounting surface or underside of the sanding pad. As a result, the air required for extraction can also flow unhindered into the sanding pad when the user is working the entire surface of the material with the sanding pad.
  • a developed additional suction duct branches off from the at least one connecting duct, which has a radial duct section connected to the connecting duct and an axial duct section adjoining the radial duct section via a fourth dust extraction opening on the mounting surface.
  • the openings of the air suction openings can be optimized in terms of flow, so that in particular the formation of tear-off edges for the air flow when it flows into the air suction openings can be avoided. This contributes significantly to the establishment of a laminar flow through the suction channel system. It is therefore particularly important that the contour of the air suction opening, in particular of the channel-shaped section, is designed without edges. This can be done, for example, by a flow-modulated contour of the air suction openings, in which tangent-constant transitions are formed. In principle, it would also be possible to form transitions with constant curvature (G2 continuity), although the effort here is greater.
  • G2 continuity constant curvature
  • the fastening surface of the sanding disc is free of suction channels opening out on the surface of the disc rim. This improves the sanding effect, since when the sanding means is fastened to the fastening surface, in particular a sanding sheet, no slits opening out at the edge surface required for suction have to be formed, so that there is a larger bearing surface and thus grinding surface at the edge is available.
  • At least one ventilation duct for ventilation of the working side of the grinding disk opens out on the plate edge surface via a ventilation opening.
  • air can flow to the inside of the fastening means attached to the fastening surface, which can be, for example, an adhesive layer in the form of a velcro adhesive covering of a velcro adhesive fastener, thereby causing turbulence of the dust particles so that they can be sucked off via the suction channel system and do not accumulate on the inside of the adhesive layer.
  • the base part is expediently designed as a foam body.
  • the suction channel system with the dust suction openings and the air suction openings are expediently formed at the same time.
  • the cover part is expediently a plastic part, for example a plastic injection-moulded part, in which case the dust outlet openings can also be formed at the same time during production, in particular by means of plastic injection moulding.
  • the attachment surface of the sanding plate has an annular outer edge section in which only the second dust extraction openings are arranged.
  • the sanding disc according to the invention manages with a smaller number of dust extraction openings and air suction openings, since the main direction of flow leads from the peripheral air suction openings via the suction channel system to the dust outlet openings and not, as in the prior art the dust extraction openings on the mounting surface to the dust outlet openings, so that both the flow rate and the volume flow of extracted air is significantly increased compared to the prior art.
  • the grinding plate according to the invention makes do with 30% to 50% fewer dust extraction openings compared to the prior art.
  • the invention also relates to a sanding system with a sanding disc according to one of the preceding claims and with an abrasive in the form of a sanding sheet which is attached to the fastening surface of the sanding disc via a fastening device can be fastened or is fastened and has suction openings which are aligned with the dust extraction openings arranged on the fastening surface of the sanding disc.
  • the abrasive in particular the grinding sheet, has an abrasion layer with which the surface of the workpiece to be ground is machined.
  • the abrasion layer can have a grain size or an abrasive fabric.
  • FIG. 2 shows a top view of the grinding device from FIG.
  • the drive in the form of the drive motor can drive a tool shaft directly or via a gear (not shown), on the output member (not shown) of which a sanding plate holder (not shown) is arranged, on which the sanding plate 11 is described in more detail below Way via its attachment interface 15 can be coupled.
  • the air suction openings 36 on the disk edge surface 30 are therefore connected to the dust outlet openings 38 arranged on the upper side of the sanding disk 11 by essentially the shortest route.
  • the main suction thus takes place via the peripheral air tansaugöf f openings 36 on the plate rim surface 30 in the direction of the dust outlet openings 38 .
  • the radial suction channel 40 between the peripheral air suction openings 36 and the axial through channel 39 therefore forms, together with the upper section of the axial through channel 39, a main suction channel.
  • the first dust extraction openings 35a are arranged radially further inwards than the second dust extraction openings 35b.
  • the first dust extraction openings 35a are expediently grouped at regular intervals around the center point of the sanding disc 11 . It is possible, for example, for the same number of first dust extraction openings 35a to be arranged in each quadrant of the fastening surface 28 of the sanding disk 11, for example two first dust extraction openings 35a.
  • two connecting channels 42a, 42b are provided on both sides of a horizontal center line through the sanding disk, each of which connects a plurality of the axial through-channels 39 to one another, for example four axial through-channels 39 each.
  • an angled additional suction duct 50 branches off from the at least one connecting duct 42a, 42b, which has a radial duct section 51 connected to the connecting duct and an axial duct section 52 adjoining the radial duct section 51, which has a fourth dust extraction opening 35d opens out on the fastening surface 28 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Abstract

L'invention se rapporte à un disque de broyage pour un dispositif de broyage (12) présentant une interface de fixation (15) formée sur un côté du dispositif (26) du disque de broyage (11) faisant face au dispositif de broyage (12), caractérisé en ce que : sur un côté de travail (27) axialement opposé au côté du dispositif (26), le disque de broyage (11) présente une surface de fixation (28) sur laquelle sont ménagées des ouvertures d'extraction de poussière (35a à 35d) ; des ouvertures d'admission d'air (36) sont ménagées sur la surface de bord de disque (30) et sont reliées chacune par le biais d'un système de canal d'extraction (37) s'étendant dans le disque de broyage (11) à des ouvertures de sortie de poussière (38) qui sont ménagées du côté du dispositif (26) du disque de broyage (11) et sont reliées chacune par l'intermédiaire de canaux traversants axiaux (39) à des premières ouvertures d'extraction de poussière (35a) ménagées sur la surface de fixation (28) ; un canal d'extraction radial (40) s'étendant radialement vers l'extérieur se ramifie à partir de chacun des canaux traversants axiaux (39) et débouche dans l'une des ouvertures d'admission d'air périphériques (36) ; et un canal d'extraction axial (41) se ramifie à partir de chacun des canaux d'extraction radiaux (40) et débouche sur la surface de fixation (28) par le biais d'une seconde ouverture d'extraction de poussière (35b).
EP22772427.5A 2021-08-31 2022-08-24 Disque de broyage pour un dispositif de broyage et système de broyage Pending EP4395961A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021209532.1A DE102021209532A1 (de) 2021-08-31 2021-08-31 Schleifteller für ein Schleifgerät und Schleifsystem
PCT/EP2022/073614 WO2023030999A1 (fr) 2021-08-31 2022-08-24 Disque de broyage pour un dispositif de broyage et système de broyage

Publications (1)

Publication Number Publication Date
EP4395961A1 true EP4395961A1 (fr) 2024-07-10

Family

ID=83355261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22772427.5A Pending EP4395961A1 (fr) 2021-08-31 2022-08-24 Disque de broyage pour un dispositif de broyage et système de broyage

Country Status (5)

Country Link
US (1) US20240367289A1 (fr)
EP (1) EP4395961A1 (fr)
CN (1) CN117881502A (fr)
DE (1) DE102021209532A1 (fr)
WO (1) WO2023030999A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026008583A1 (fr) * 2024-07-05 2026-01-08 Robert Bosch Gmbh Dispositif tampon de ponçage et/ou de polissage et machine de ponçage et/ou de polissage le comprenant

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1466545A (en) 1974-03-26 1977-03-09 Nederman B Abrasive disc
DE8704856U1 (de) 1987-04-01 1987-08-13 Ihmels, Hartmut, 2905 Edewecht Schleifteller
DE8902423U1 (de) * 1989-03-01 1989-06-29 Ihmels, Hartmut, 2905 Edewecht Schleifteller für eine mit Staubabsaugung ausgerüstete Schleifmaschine
US5105585A (en) 1991-04-26 1992-04-21 The United States Of America As Represented By The Department Of Health And Human Services Dust emissions control mechanism for hand sanders
CN2701589Y (zh) * 2004-04-06 2005-05-25 陈信宇 改进结构的研磨盘
DE102005014045A1 (de) * 2005-03-23 2006-09-28 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Schleifteller
DE102007059616A1 (de) * 2007-12-11 2009-06-18 Festool Gmbh Schleifteller und Schleifmittel
CN103386642B (zh) * 2012-05-09 2015-09-23 海峰机械工业股份有限公司 集尘式研磨机
PT107454A (pt) 2014-02-06 2015-08-06 Indasa Indústria De Abrasivos S A Prato com rasgos para discos de lixagem multifuros
DE102016100072A1 (de) 2016-01-04 2017-07-06 Festool Gmbh Schleifteller und Schleifmittel
TWM562741U (zh) * 2018-04-18 2018-07-01 頑鎂貿易股份有限公司 研磨盤

Also Published As

Publication number Publication date
CN117881502A (zh) 2024-04-12
US20240367289A1 (en) 2024-11-07
WO2023030999A1 (fr) 2023-03-09
DE102021209532A1 (de) 2023-03-02

Similar Documents

Publication Publication Date Title
DE3003805C2 (de) Druckluftbetriebene Handschleifmaschine
DE602004003623T2 (de) Bandsäge mit Saugvorrichtung
DE2427450C3 (de) Staubsaugvorrichtung
EP2527089B1 (fr) Appareil de meulage manuel motorisé
EP1775071B1 (fr) Disque abrasif pour machine à meuler
DE2843712A1 (de) Drehschleifwerkzeug
DE19959348A1 (de) Schleifscheibe für die Verwendung in einer Schleifvorrichtung
EP2163356B1 (fr) Machine-outil manuel dotée d'un capot de recouvrement et d'un raccordement d'évacuation de poussière
DE7603045U1 (de) Schleifmaschine mit schleifblatt
WO2012028505A1 (fr) Unité de plateau circulaire de meulage pour une meuleuse rotative
EP0215476B1 (fr) Meuleur rotatif avec dispositif d'aspiration de la poussière
DE102016100072A1 (de) Schleifteller und Schleifmittel
WO2023030999A1 (fr) Disque de broyage pour un dispositif de broyage et système de broyage
DE19945060B4 (de) Schleifhandwerkzeugmaschine
EP0535431B1 (fr) Meuleuse d'angle
DE102004018727A1 (de) Schleifteller mit Eigenabsaugeinrichtung und Verfahren zum Entfernen von Schleifpatikeln
DE102006011663A1 (de) Angetriebenes Werkzeug mit Staubsammelfunktion
WO2006018343A1 (fr) Machine-outil manuelle, notamment ponceuse
EP1925401B1 (fr) Meuleuse portative à moteur avec mécanisme d'aspiration réglable
DE4032069A1 (de) Hand-schleifmaschine
EP3058893B1 (fr) Dispositif d'aspiration
DE102006061635A1 (de) Handgeführte Werkzeugmaschine
DE102012214382A1 (de) Wechselbares Schleifmittel für ein Schleifgerät mit Absaugvorrichtung
DE202004006078U1 (de) Schleifteller mit Eigenabsaugeinrichtung
DE102020213229A1 (de) Handschleifmaschine

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20240229

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)