EP2153939B1 - Flap grinding wheel - Google Patents

Flap grinding wheel Download PDF

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Publication number
EP2153939B1
EP2153939B1 EP08014589A EP08014589A EP2153939B1 EP 2153939 B1 EP2153939 B1 EP 2153939B1 EP 08014589 A EP08014589 A EP 08014589A EP 08014589 A EP08014589 A EP 08014589A EP 2153939 B1 EP2153939 B1 EP 2153939B1
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding wheel
tensile strength
lamellae
flap
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.)
Active
Application number
EP08014589A
Other languages
German (de)
French (fr)
Other versions
EP2153939A1 (en
Inventor
Olaf Schweitzer
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.)
August Rueggeberg GmbH and Co KG
Original Assignee
August Rueggeberg 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40263340&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2153939(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to AT08014589T priority Critical patent/ATE486694T1/en
Priority to PL08014589T priority patent/PL2153939T3/en
Priority to SI200830145T priority patent/SI2153939T1/en
Priority to EP08014589A priority patent/EP2153939B1/en
Priority to ES08014589T priority patent/ES2352066T3/en
Application filed by August Rueggeberg GmbH and Co KG filed Critical August Rueggeberg GmbH and Co KG
Priority to DE502008001730T priority patent/DE502008001730D1/en
Priority to PCT/EP2009/004275 priority patent/WO2010020301A1/en
Publication of EP2153939A1 publication Critical patent/EP2153939A1/en
Publication of EP2153939B1 publication Critical patent/EP2153939B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/02—Backings, e.g. foils, webs, mesh fabrics
    • 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
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/16—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips

Definitions

  • Such a fan-grinding wheel is from the EP 1 859 905 A known.
  • the invention is based on the object, the grinding blades and thus the fan grinding wheel in such a way that over the entire service life of the fan-Scheiffraction optimal grinding results are achieved.
  • the carrier fabric is quasi-stress-isotropic, with a tensile strength F 24 in the direction of the warp threads of 2000 N / 50 mm ⁇ F 24 ⁇ 5000 N / 50 mm, with a tensile strength F 25 in the direction of the weft threads, of 2000 N / 50 mm ⁇ F 25 ⁇ 5000 N / 50 mm and with a ratio of 0.75 ⁇ F 24 / F 25 ⁇ 1.25 and that the carrier fabric has a basis weight of 100 to 400 g / m 2 .
  • the invention is based on the finding that the grinding results achievable with conventional fan grinding wheels are very different over the service life of the fan grinding wheel. It has been recognized that the tensile strength of the carrier fabric in the direction of the warp threads and in the direction of the weft threads is very different and that in the case of abrasive lamellae which extend over a large overlap angle, the direction of the warp threads and the weft threads in the radial direction and in the circumferential direction, ie Offset 90 ° relative to the radial direction, change with increasing removal of each grinding blade, so that also the tensile forces in the circumferential direction, in which attack the grinding forces substantially change. This changes the removal of the grinding lamellae.
  • each grinding flap can be adjusted so that it wears out by fluff when the adhering abrasive grain is consumed.
  • carrier fabric is used in this application, then it is meant the raw carrier fabric, that is, not yet, for example with latex, equipped carrier fabric.
  • the measures according to the invention can be used in fan-grinding wheels in the usual practice dimensions of 100 to 230 mm diameter.
  • Fig. 1 and 2 has a fan-grinding disc on a support plate 1 with a hub 2, which has a central, circular opening 3.
  • the fan grinding wheel has a central center axis 4.
  • the support plate 1 has an outer annular edge region 5 for receiving grinding lamellae 6.
  • This edge region 5 is connected to the hub 2 via a ring web 7 projecting in the direction of the center axis 4 of the support plate 1.
  • the edge region 5 can be inclined radially outward against the annular web 7, as Fig. 2 is removable. This has in the illustrated embodiment, the result that the working surface 8 of the arranged on the support plate 1 grinding blades 6 again extends substantially radially and perpendicular to the central axis 4.
  • this geometry results from the fact that more and more abrasive flaps 6 overlap or overlap one another from the inside to the outside Fig. 1 is removable.
  • the grinding blades 6 are fastened on the edge region 5 of the support plate 1 by means of an adhesive layer 9.
  • Fig. 1 can be removed, the grinding blades 6 are arranged on the support plate 1 at equal angular intervals, in each case rotationally symmetrical in the same position to the support plate 1.
  • the in Fig. 1 and 2 illustrated embodiment corresponds to the outer radius R 10 of the mounted on the support plate 1
  • Abrasive lamellae package 10 the radius of curvature R 11 of the respective outer edge 11 of the mounted on the support plate 1 grinding lamellae 6, so that the outwardly beyond the edge region 5 protruding outer edge 12 of Abrasive blade package 10 is circular.
  • a grinding blade 6 is shown in dashed lines; It can be seen that their respective abrasive region 13 only extends from its trailing edge 14 to the next trailing edge 14 arranged leading in the direction of rotation 15 of the grinding wheel. It can also be seen that the overlap angle ⁇ of each grinding blade 6 is very large.
  • the overlap angle ⁇ is the largest possible angle between two straight lines 16, 17 which extend radially outward from the center axis 4 and no longer intersect the respective grinding lamella 6, but contact them at their outermost region relative to the circumferential direction.
  • the abrasive slats 6 are cut from long strips 21 of abrasives 22 on backing, wherein it is a support fabric 23, the warp yarns 24 extend in the longitudinal direction of the belt 21 while the weft yarns 25 extend transversely thereto.
  • Fig. 4 is further illustrated for better understanding on a support plate 1, only a grinding blade 6, wherein according to the representation of the warp threads 24 and the weft threads 25 in Fig. 3 their position relative to the support plate 1 can be seen.
  • the illustration shows that the warp threads 24 neither pronounced in the radial direction nor pronounced in tangential, ie circumferential direction, of the support plate 1 run.
  • Fig. 5 to 7 is a den Fig. 1 . 3 and 4 corresponding representation for grinding blades 6 included, which are not cut in this case from a band, but a sheet 26 of carrier fabric 23 with resin-bonded abrasive 22.
  • the abrasive lamellae package 10 'forming abrasive lamellae 6' are formed annular ring portion, that is, they have a circular portion-shaped outer edge 11 'and a likewise circular section-shaped inner edge 19', one - with respect to the direction of rotation 15 - in front of a leading edge 27 and a trailing Trailing edge 14 'on.
  • Fig. 6 can be removed, is the outer edge 11 'as in the embodiment according to Fig.
  • the carrier plate 1 ' is flat in this case or just formed as a disk, there - like Fig. 5 can be removed - the arranged at equal angular intervals grinding blades 6 'each completely overlap each other in the radial direction and indeed over the full circumference extent a'.
  • the radial width b ' is the same everywhere.
  • Fig. 5 and 6 is removable, applies to the coverage angle ⁇ in this case ⁇ > 110 °.
  • the warp threads 24 and the weft threads 25 are shown, wherein it can be seen that their direction changes relative to the radius R or to the circumferential direction offset by 90 ° over the extension a '.
  • the overlap angle ⁇ is very large.
  • the extent a, a 'of the grinding blades 6, 6' in the region of their respective outer edge 11, 11 ' is significantly greater than their width b, b' in the radial direction, ie towards the center axis 4, in the embodiment according to the Fig. 1 to 4 this width decreases towards the tip 18, 18 '.
  • a ⁇ 1.5 b and a ' ⁇ 2.5 b' For the greatest width b or b 'in relation to the extent a or a' applies: a ⁇ 1.5 b and a ' ⁇ 2.5 b'.
  • the tensile strength of the carrier fabric 23 is in the direction of the warp threads 24 and the weft threads 25 each in the range of 2000 to 5000 N / 50 mm. This tensile strength is defined according to DIN 1421. It is essential here that the high tensile strength is achieved in the direction of the warp threads 24 as well as the weft threads 25 with a simultaneously low basis weight of the carrier fabric 23 of 100 to 400 g / m 2 .
  • the carrier fabric 23 preferably obtains these properties when it is woven in twill weave.
  • the fan-grinding wheels according to the invention are preferably used in hand-grinders 28, namely so-called angle grinders. They are attached to an output shaft 29 of the grinding machine 28, which is inserted through the central opening 3, so that the center axis 4 of the support plate 1 coincides with the corresponding center axis of the output shaft 29.
  • the use of the grinding wheel takes place on a workpiece 31 to be machined in such a way that the grinding wheel with the grinding lamella package 10 is placed obliquely on the workpiece 31 to be machined.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Packaging Of Machine Parts And Wound Products (AREA)
  • Woven Fabrics (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Power Steering Mechanism (AREA)

Abstract

The disk has sliding lamellas (6') comprising an outer edge (11') and a rear edge (14'). The outer edge defines a part of outer edge of sliding lamella packet (10'). The sliding lamellas are covered in a rotary direction (15) and the rear edge is opened. A backing fabric is formed as a quasi-voltage isotropic with a tensile strength in a direction of warp thread of 2000 N/50 mm = tensile strength = to 5000 N/50 mm, another tensile strength in a direction of filling thread of 2000 N/50 mm = tensile strength = 5000 N/50 mm, and comprises a mass per unit area of 100 to 400 g/m2.

Description

Die Erfindung betrifft eine Fächer-Schleifscheibe, die in einer Drehrichtung drehantreibbar ist,

  • mit einem Tragteller, der
    • - eine Mittel-Achse,
    • - eine innere Nabe und
    • - einen ringförmigen Randbereich
      aufweist,
  • mit Schleiflamellen, die
    • - eine Außenkante und eine Hinterkante aufweisen,
    • - aus kunstharzgebundenem Schleifmittel auf einem Kettfäden und Schussfäden aufweisenden Trägergewebe gebildet sind,
    • - den Tragteller in dessen Umfangsrichtung mit einem Überdeckungswinkel α überdecken, für den gilt: α ≥ 70° und
    • - auf dem Randbereich unter Bildung eines ringförmigen Schleiflamellen-Pakets in gleichen Winkelabständen derart angeordnet sind, dass
      • -- die Außenkante einen Teil eines Außenrandes des Schleiflamellen-Pakets begrenzt,
      • -- jede Schleiflamelle teilweise von in Drehrichtung vorgeordneten Schleiflamellen überdeckt wird und
      • -- die Hinterkante offen liegt.
The invention relates to a fan grinding wheel which is rotationally drivable in one direction of rotation,
  • with a carrier plate, the
    • a center axis,
    • - an inner hub and
    • - An annular edge region
      having,
  • with grinding blades, the
    • have an outer edge and a trailing edge,
    • are formed of synthetic resin-bonded abrasive on a warp threads and weft threads having carrier fabric,
    • - Cover the support plate in the circumferential direction with an overlap angle α, for which applies: α ≥ 70 ° and
    • - Are arranged on the edge region to form an annular abrasive lamella package at equal angular intervals such that
      • the outer edge delimits a part of an outer edge of the grinding lamella packet,
      • - Each grinding blade is partially covered by upstream in the direction of rotation grinding lamellae and
      • - The trailing edge is open.

Eine derartige Fächer-Schleifscheibe ist aus der EP 1 859 905 A bekannt.Such a fan-grinding wheel is from the EP 1 859 905 A known.

Der Erfindung liegt die Aufgabe zugrunde, die Schleiflamellen und damit die Fächer-Schleifscheibe so auszubilden, dass über die gesamte Standzeit der Fächer-Scheifscheibe optimale Schleifergebnisse erzielt werden.The invention is based on the object, the grinding blades and thus the fan grinding wheel in such a way that over the entire service life of the fan-Scheifscheibe optimal grinding results are achieved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass das Trägergewebe quasi-spannungsisotrop ausgebildet ist, mit einer Zugfestigkeit F24 in Richtung der Kettfäden von 2000 N/50 mm ≤ F24 ≤ 5000 N/50 mm,
mit einer Zugfestigkeit F25 in Richtung der Schussfäden, von 2000 N/50 mm ≤ F25 ≤ 5000 N/50 mm und mit einem Verhältnis von 0,75 ≤ F24/F25 ≤ 1,25 und
dass das Trägergewebe ein Flächengewicht von 100 bis 400 gr/m2 aufweist.This object is achieved according to the invention in that the carrier fabric is quasi-stress-isotropic, with a tensile strength F 24 in the direction of the warp threads of 2000 N / 50 mm ≦ F 24 ≦ 5000 N / 50 mm,
with a tensile strength F 25 in the direction of the weft threads, of 2000 N / 50 mm ≤ F 25 ≤ 5000 N / 50 mm and with a ratio of 0.75 ≤ F 24 / F 25 ≤ 1.25 and
that the carrier fabric has a basis weight of 100 to 400 g / m 2 .

Der Erfindung liegt die Erkenntnis zugrunde, dass die mit konventionellen Fächer-Schleifscheiben erreichbaren Schleifergebnisse über die Standzeit der Fächer-Schleifscheibe sehr unterschiedlich sind. Es wurde erkannt, dass die Zugfestigkeit der Trägergewebe in Richtung der Kettfäden und in Richtung der Schussfäden sehr unterschiedlich ist und dass bei Schleiflamellen, die sich über einen großen Überdeckungswinkel erstrecken, die Richtung der Kettfäden und der Schussfäden in radialer Richtung und in Umfangsrichtung, also um 90° versetzt gegenüber der radialen Richtung, sich mit zunehmendem Abtrag jeder Schleiflamelle ändern, dass also auch die Zugkräfte in Umfangsrichtung, in der im Wesentlichen die Schleifkräfte angreifen, sich verändern. Damit ändert sich der Abtrag der Schleiflamellen. Es wurde weiterhin erkannt, dass sich durch eine Vergrößerung der Zugfestigkeit des Trägergewebes in Richtung der Kettfäden und in Richtung der Schussfäden allein diese Probleme nicht lösen lassen, da das Gewicht des Trägergewebes bei der Anwendung auf Fächer-Schleifscheiben von großer Bedeutung ist. Fächer-Schleifscheiben rotieren mit sehr hohen Geschwindigkeiten. Wenn ein Trägergewebe ein hohes Flächengewicht hat, dann begrenzt dies die Menge des auf die Schleiflamellen und damit auch die Schleifscheibe insgesamt aufbringbaren Schleifmittels auf dem Trägergewebe als Unterlage. Durch die Ausgestaltung des Trägergewebes als quasi-spannungsisotropes Flächengebilde bei sehr niedrigem Flächengewicht werden diese Probleme gelöst. Hierdurch wird erreicht, dass der Verschleiß der ablaufenden Kante, also der Hinterkante, jeder einzelnen Schleiflamelle so eingestellt werden kann, dass diese durch Flusen verschleißt, wenn das darauf haftende Schleifkorn verbraucht wird. Mit anderen Worten heißt dies, dass immer wieder neues Schleifkorn in Schleifeingriff gebracht wird, was voraussetzt, dass zusammen mit dem Verschleiß des Schleifkorns auch ein Verschleiß des Trägergewebes durch Flusen, also durch Auflösen in kleine Fasern oder Faserbündel, erfolgt. Soweit in dieser Anmeldung der Begriff "Trägergewebe" verwendet wird, dann ist damit das rohe Trägergewebe, also das noch nicht, beispielsweise mit Latex, ausgerüstete Trägergewebe gemeint.The invention is based on the finding that the grinding results achievable with conventional fan grinding wheels are very different over the service life of the fan grinding wheel. It has been recognized that the tensile strength of the carrier fabric in the direction of the warp threads and in the direction of the weft threads is very different and that in the case of abrasive lamellae which extend over a large overlap angle, the direction of the warp threads and the weft threads in the radial direction and in the circumferential direction, ie Offset 90 ° relative to the radial direction, change with increasing removal of each grinding blade, so that also the tensile forces in the circumferential direction, in which attack the grinding forces substantially change. This changes the removal of the grinding lamellae. It has further been recognized that by increasing the tensile strength of the carrier fabric in the direction of the warp threads and in the direction of the weft threads alone, these problems can not be solved since the weight of the carrier fabric is of great importance when applied to fan-shaped abrasive wheels. Fan grinding wheels rotate at very high speeds. If a backing fabric has a high basis weight, then this limits the amount of abrasive applied to the abrasive sipes and thus also the abrasive wheel altogether Carrier fabric as a base. Due to the design of the carrier fabric as quasi-stress-isotropic fabric at very low basis weight these problems are solved. This ensures that the wear of the running edge, ie the trailing edge, each grinding flap can be adjusted so that it wears out by fluff when the adhering abrasive grain is consumed. In other words, this means that again and again new abrasive grain is brought into grinding engagement, which assumes that along with the wear of the abrasive grain and a wear of the carrier fabric by linting, ie by dissolving into small fibers or fiber bundles occurs. Insofar as the term "carrier fabric" is used in this application, then it is meant the raw carrier fabric, that is, not yet, for example with latex, equipped carrier fabric.

Diese vorteilhaften Effekte der erfindungsgemäßen Kombination werden durch die Weiterbildung nach den Unteransprüchen noch weiter verbessert.These advantageous effects of the combination according to the invention are further improved by the development according to the subclaims.

Die erfindungsgemäßen Maßnahmen sind bei Fächer-Schleifscheiben in den in der Praxis üblichen Maßen von 100 bis 230 mm Durchmesser einsetzbar.The measures according to the invention can be used in fan-grinding wheels in the usual practice dimensions of 100 to 230 mm diameter.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausfiihrungsbeispielen anhand der Erfindung. Es zeigt

Fig. 1
eine Fächer-Schleifscheibe nach der Erfindung in Drauf- sicht,
Fig. 2
einen Querschnitt durch die Fächer-Schleifscheibe nach Fig. 1,
Fig. 3
ein Schleifband, aus dem nacheinander Schleiflamellen zu schneiden sind,
Fig. 4
einen Tragteller mit nur einer Schleiflamelle nach Fig. 3 in Draufsicht,
Fig. 5
weitere Ausführungsformen einer Fächer-Schleifscheibe nach der Erfindung in Draufsicht,
Fig. 6
einen Tragteller mit nur einer Schleiflamelle nach Fig. 5,
Fig. 7
ein bogenförmiges Trägergewebe mit Schleifmittel, aus dem Schleiflamellen nach den Fig. 5 und 6 geschnitten werden und
Fig. 8
eine Hand-Schleifmaschine mit einer Fächer- Schleifscheibe nach der Erfindung im Schleifeinsatz.
Further features, advantages and details of the invention will become apparent from the following description of exemplary embodiments with reference to the invention. It shows
Fig. 1
a fan grinding wheel according to the invention in a plan view,
Fig. 2
a cross section through the fan grinding wheel after Fig. 1 .
Fig. 3
a sanding belt from which sanding lamellae are to be cut successively,
Fig. 4
a carrier plate with only one grinding blade after Fig. 3 in plan view,
Fig. 5
Further embodiments of a fan grinding wheel according to the invention in plan view,
Fig. 6
a carrier plate with only one grinding blade after Fig. 5 .
Fig. 7
an arcuate carrier fabric with abrasive, from the grinding blades after the Fig. 5 and 6 be cut and
Fig. 8
a hand grinder with a fan grinding wheel according to the invention in the grinding insert.

Wie sich aus den Fig. 1 und 2 ergibt, weist eine Fächer-Schleifscheibe einen Tragteller 1 mit einer Nabe 2 auf, die eine zentrische, kreisförmige Öffnung 3 aufweist. Die Fächer-Schleifscheibe weist eine zentrale Mittel-Achse 4 auf. Der Tragteller 1 weist einen äußeren ringförmigen Randbereich 5 zur Aufnahme von Schleiflamellen 6 auf. Dieser Randbereich 5 ist mit der Nabe 2 über einen in Richtung der Mittel-Achse 4 des Tragtellers 1 vorstehenden Ringsteg 7 verbunden. Der Randbereich 5 kann radial nach außen entgegen dem Ringsteg 7 geneigt sein, wie Fig. 2 entnehmbar ist. Dies hat im dargestellten Ausführungsbeispiel zur Folge, dass die Arbeitsfläche 8 der auf dem Tragteller 1 anzuordnenden Schleiflamellen 6 wieder im Wesentlichen radial und senkrecht zur Mittel-Achse 4 verläuft. Diese Geometrie ergibt sich im vorliegenden Fall daraus, dass von innen nach außen immer mehr Schleiflamellen 6 einander überlappen bzw. überdecken, wie Fig. 1 entnehmbar ist. Die Schleiflamellen 6 sind auf dem Randbereich 5 des Tragtellers 1 mittels einer Klebstoff-Schicht 9 befestigt.As is clear from the Fig. 1 and 2 results, has a fan-grinding disc on a support plate 1 with a hub 2, which has a central, circular opening 3. The fan grinding wheel has a central center axis 4. The support plate 1 has an outer annular edge region 5 for receiving grinding lamellae 6. This edge region 5 is connected to the hub 2 via a ring web 7 projecting in the direction of the center axis 4 of the support plate 1. The edge region 5 can be inclined radially outward against the annular web 7, as Fig. 2 is removable. This has in the illustrated embodiment, the result that the working surface 8 of the arranged on the support plate 1 grinding blades 6 again extends substantially radially and perpendicular to the central axis 4. In the present case, this geometry results from the fact that more and more abrasive flaps 6 overlap or overlap one another from the inside to the outside Fig. 1 is removable. The grinding blades 6 are fastened on the edge region 5 of the support plate 1 by means of an adhesive layer 9.

Wie insbesondere Fig. 1 entnehmbar ist, sind die Schleiflamellen 6 auf dem Tragteller 1 in gleichen Winkelabständen angeordnet, und zwar jeweils drehsymmetrisch in gleicher Lage zum Tragteller 1. Bei dem in Fig. 1 und 2 dargestellten Ausführungsbeispiel entspricht der Außen-Radius R10 des auf dem Tragteller 1 befestigten Schleiflamellen-Pakets 10 dem Krümmungs-Radius R11 der jeweiligen Außenkante 11 der auf dem Tragteller 1 befestigten Schleiflamellen 6, sodass der nach außen über den Randbereich 5 überstehende Außenrand 12 des Schleiflamellen-Pakets 10 kreisförmig ist.In particular Fig. 1 can be removed, the grinding blades 6 are arranged on the support plate 1 at equal angular intervals, in each case rotationally symmetrical in the same position to the support plate 1. In the in Fig. 1 and 2 illustrated embodiment corresponds to the outer radius R 10 of the mounted on the support plate 1 Abrasive lamellae package 10 the radius of curvature R 11 of the respective outer edge 11 of the mounted on the support plate 1 grinding lamellae 6, so that the outwardly beyond the edge region 5 protruding outer edge 12 of Abrasive blade package 10 is circular.

In Fig. 1 ist eine Schleiflamelle 6 gestrichelt dargestellt; es ist erkennbar, dass sich ihr jeweiliger schleifaktiver Bereich 13 nur von ihrer Hinterkante 14 bis zur nächsten in Drehrichtung 15 der Schleifscheibe voreilend angeordneten Hinterkante 14 erstreckt. Es ist weiterhin erkennbar, dass der Überdeckungswinkel α jeder Schleiflamelle 6 sehr groß ist. Der Überdeckungswinkel α ist der größtmögliche Winkel zwischen zwei sich radial von der Mittel-Achse 4 aus nach außen erstreckenden Geraden 16, 17, die die jeweilige Schleiflamelle 6 nicht mehr schneiden, sie aber an ihrem - bezogen auf die Umfangsrichtung - äußersten Bereich berühren. Im vorliegenden Fall der dreieckigen Schleiflamellen 6 berührt die Gerade 16 die Spitze 18 zwischen der Außenkante 11 und der Innenkante 19, während die Gerade 17 die Spitze 20 zwischen der Innenkante 19 und der Hinterkante 14 berührt. Im Vorliegenden gilt etwa α = 90°.In Fig. 1 a grinding blade 6 is shown in dashed lines; It can be seen that their respective abrasive region 13 only extends from its trailing edge 14 to the next trailing edge 14 arranged leading in the direction of rotation 15 of the grinding wheel. It can also be seen that the overlap angle α of each grinding blade 6 is very large. The overlap angle α is the largest possible angle between two straight lines 16, 17 which extend radially outward from the center axis 4 and no longer intersect the respective grinding lamella 6, but contact them at their outermost region relative to the circumferential direction. In the present case of the triangular grinding blades 6, the straight line 16 touches the tip 18 between the outer edge 11 and the inner edge 19, while the Just 17 touches the tip 20 between the inner edge 19 and the trailing edge 14. In the present case is about α = 90 °.

Wie aus Fig. 3 hervorgeht, werden die Schleiflamellen 6 aus langen Bändern 21 von Schleifmitteln 22 auf Unterlage geschnitten, wobei es sich bei der Unterlage um ein Trägergewebe 23 handelt, dessen Kettfäden 24 in Längsrichtung des Bandes 21 verlaufen, während die Schussfäden 25 quer hierzu verlaufen.How out Fig. 3 As can be seen, the abrasive slats 6 are cut from long strips 21 of abrasives 22 on backing, wherein it is a support fabric 23, the warp yarns 24 extend in the longitudinal direction of the belt 21 while the weft yarns 25 extend transversely thereto.

In Fig. 4 ist weiter zum besseren Verständnis auf einem Tragteller 1 nur eine Schleiflamelle 6 dargestellt, wobei entsprechend der Darstellung der Kettfäden 24 und der Schussfäden 25 in Fig. 3 deren Lage relativ zum Tragteller 1 erkennbar ist. Die Darstellung zeigt, dass die Kettfäden 24 weder ausgeprägt in Radialrichtung noch ausgeprägt in Tangential- , d. h. Umfangsrichtung, des Tragtellers 1 verlaufen. Für die Schussfäden 25 gilt um 90° verdreht das Entsprechende.In Fig. 4 is further illustrated for better understanding on a support plate 1, only a grinding blade 6, wherein according to the representation of the warp threads 24 and the weft threads 25 in Fig. 3 their position relative to the support plate 1 can be seen. The illustration shows that the warp threads 24 neither pronounced in the radial direction nor pronounced in tangential, ie circumferential direction, of the support plate 1 run. For the weft threads 25 applies by 90 ° twisted the corresponding.

In den Fig. 5 bis 7 ist eine den Fig. 1, 3 und 4 entsprechende Darstellung für Schleiflamellen 6 enthalten, die in diesem Fall nicht aus einem Band, sondern einem Bogen 26 von Trägergewebe 23 mit kunstharzgebundenem Schleifmittel 22 geschnitten werden. In diesem Fall sind die ein Schleiflamellen-Paket 10' bildenden Schleiflamellen 6' kreisringabschnittsförmig ausgebildet, das heißt sie weisen eine kreisabschnittsförmige Außenkante 11' und eine ebenfalls kreisabschnittsförmige Innenkante 19', eine - bezogen auf die Drehrichtung 15 - vor einer Vorderkante 27 und eine nacheilende Hinterkante 14' auf. Wie Fig. 6 entnehmbar ist, steht die Außenkante 11' wie beim Ausführungsbeispiel nach Fig. 1 bis 4 über den Außenrand des Tragtellers 1' über und weist einen Krümmungs-Radius R11' auf, der dem Radius R10' des Schleiflamellen-Pakets 10' entspricht. Der Tragteller 1' ist in diesem Fall flach bzw. eben als Scheibe ausgebildet, da - wie Fig. 5 entnehmbar ist - die in gleichen Winkelabständen angeordneten Schleiflamellen 6' einander in radialer Richtung jeweils vollständig überdecken und zwar über die volle Umfangs-Erstreckung a'. Die radiale Breite b' ist überall gleich. Wie den Fig. 5 und 6 entnehmbar ist, gilt für den Überdeckungswinkel α in diesem Fall α > 110°. In den Fig. 5 bis 7 sind auch die Kettfäden 24 und die Schussfäden 25 dargestellt, wobei erkennbar ist, dass sich ihre Richtung relativ zum Radius R bzw. zur um 90° hiergegen versetzten Umfangsrichtung über die Erstreckung a' ändert.In the Fig. 5 to 7 is a den Fig. 1 . 3 and 4 corresponding representation for grinding blades 6 included, which are not cut in this case from a band, but a sheet 26 of carrier fabric 23 with resin-bonded abrasive 22. In this case, the abrasive lamellae package 10 'forming abrasive lamellae 6' are formed annular ring portion, that is, they have a circular portion-shaped outer edge 11 'and a likewise circular section-shaped inner edge 19', one - with respect to the direction of rotation 15 - in front of a leading edge 27 and a trailing Trailing edge 14 'on. As Fig. 6 can be removed, is the outer edge 11 'as in the embodiment according to Fig. 1 to 4 over the outer edge of the support plate 1 'over and has a radius of curvature R11', which corresponds to the radius R10 'of the grinding blade package 10'. The carrier plate 1 'is flat in this case or just formed as a disk, there - like Fig. 5 can be removed - the arranged at equal angular intervals grinding blades 6 'each completely overlap each other in the radial direction and indeed over the full circumference extent a'. The radial width b 'is the same everywhere. Like that Fig. 5 and 6 is removable, applies to the coverage angle α in this case α> 110 °. In the Fig. 5 to 7 also the warp threads 24 and the weft threads 25 are shown, wherein it can be seen that their direction changes relative to the radius R or to the circumferential direction offset by 90 ° over the extension a '.

Wie den Ausführungsbeispielen entnehmbar ist, ist der Überdeckungswinkel α sehr groß. Die Erstreckung a, a', der Schleiflamellen 6, 6' im Bereich ihrer jeweiligen Außenkante 11, 11' ist deutlich größer als ihre Breite b, b' in radialer Richtung, also zur Mittel-Achse 4 hin, wobei bei dem Ausführungsbeispiel nach den Fig. 1 bis 4 diese Breite zur Spitze 18, 18' hin abnimmt. Für die größte Breite b bzw. b' gilt im Verhältnis zur Erstreckung a bzw. a': a ≥ 1,5 b bzw. a' ≥ 2,5 b'.As can be seen from the exemplary embodiments, the overlap angle α is very large. The extent a, a 'of the grinding blades 6, 6' in the region of their respective outer edge 11, 11 'is significantly greater than their width b, b' in the radial direction, ie towards the center axis 4, in the embodiment according to the Fig. 1 to 4 this width decreases towards the tip 18, 18 '. For the greatest width b or b 'in relation to the extent a or a' applies: a ≥ 1.5 b and a '≥ 2.5 b'.

Wie sich anschaulich aus den Fig. 4, 5, 6, ergibt, ändert sich die Lage der Kettfäden 24 und der Schussfäden 25 im Bereich der jeweiligen Hinterkante 14, 14' mit dem Abtrag der Schleif-Lamelle 6, 6', und zwar bezogen auf die Radialrichtung bzw. die senkrecht hierzu verlaufende Umfangsrichtung. Dieser Abtrag beim Schleifeinsatz erfolgt im Bereich der Hinterkante 14, 14' und zwar radial nach außen, also zur Außenkante 11 hin, zunehmend. Damit verändern sich die Zugkräfte, die im Wesentlichen in Umfangsrichtung auf die Kettfäden 24 und die Schussfäden 25 wirken. In gleicher Weise verändern sich die Scherkräfte, die jeweils in radialer Richtung und in tangentialer Richtung wirken.As can be clearly seen from the Fig. 4 . 5 . 6 , results in the position of the warp threads 24 and the weft threads 25 in the region of the respective trailing edge 14, 14 'with the removal of the grinding blade 6, 6', and with respect to the radial direction or perpendicular thereto extending circumferential direction. This removal during grinding takes place in the region of the trailing edge 14, 14 ', namely radially outward, ie towards the outer edge 11, increasingly. This changes the tensile forces, which act on the warp threads 24 and the weft threads 25 substantially in the circumferential direction. In the same way, the shear forces, which act respectively in the radial direction and in the tangential direction, change.

Diese auf unterschiedliche Schleifleistungen bzw. unterschiedlichen Schleifabtrag der Fächer-Schleifscheibe zurückgehenden Auswirkungen auf ihre Lebenszeit werden dadurch kompensiert, dass die die Unterlage bildenden Trägergewebe 23 quasi-spannungsisotrop ausgebildet sind, ihre Zugfestigkeit, also Reißfestigkeit, in Richtung der Kettfäden 24 und der Schussfäden 25 also angenähert gleich ist. Für die Zug- bzw. Bruchfestigkeit F24 in Richtung der Kettfäden bzw. F25 in Richtung der Schussfäden gilt 0,75 ≤ F24/F25 ≤ 1,25 und bevorzugt 0,9 ≤ F24/F25 ≤ 1,1 und ganz besonders bevorzugt 0,95 ≤ F24/F25 ≤ 1,05.These effects on their lifetime, which are based on different grinding powers or different grinding removal of the fan grinding wheel, are compensated for by virtue of the carrier webs 23 forming quasi-stress-isotropes having their tensile strength, ie tensile strength, in the direction of the warp threads 24 and the weft threads 25 is almost the same. For the tensile strength F 24 in the direction of the warp threads or F 25 in the direction of the weft threads, 0.75 ≦ F 24 / F 25 ≦ 1.25 and preferably 0.9 ≦ F 24 / F 25 ≦ 1.1 and most preferably 0.95 ≦ F 24 / F 25 ≦ 1.05.

Die Zugfähigkeit des Trägergewebes 23 ist in Richtung der Kettfäden 24 und der Schussfäden 25 je im Bereich von 2000 bis 5000 N/50 mm. Diese Zugfestigkeit ist definiert nach DIN 1421. Wesentlich hierbei ist, dass die hohe Zugfestigkeit sowohl in Richtung der Kettfäden 24 als auch der Schussfäden 25 bei gleichzeitig niedrigem Flächengewicht des Trägergewebes 23 von 100 bis 400 g/m2 erreicht wird. Das Trägergewebe 23 erhält diese Eigenschaften bevorzugt dann, wenn es in Köperbindung gewebt ist.The tensile strength of the carrier fabric 23 is in the direction of the warp threads 24 and the weft threads 25 each in the range of 2000 to 5000 N / 50 mm. This tensile strength is defined according to DIN 1421. It is essential here that the high tensile strength is achieved in the direction of the warp threads 24 as well as the weft threads 25 with a simultaneously low basis weight of the carrier fabric 23 of 100 to 400 g / m 2 . The carrier fabric 23 preferably obtains these properties when it is woven in twill weave.

Wie sich aus Fig. 8 ergibt, werden die erfindungsgemäßen Fächer-Schleifscheiben bevorzugt in Hand-Schleifmaschinen 28, und zwar sogenannten Winkel-Schleifmaschinen, eingesetzt. Sie werden hierzu auf eine Abtriebswelle 29 der Schleifmaschine 28 aufgesteckt, die durch die MittelÖffnung 3 hindurchgesteckt wird, sodass die Mittel-Achse 4 des Tragtellers 1 mit der entsprechenden Mittel-Achse der Abtriebswelle 29 zusammenfällt. Die Befestigung der Schleifscheibe auf der Abtriebswelle 29 erfolgt mittels einer Spannmutter 30.As it turned out Fig. 8 results, the fan-grinding wheels according to the invention are preferably used in hand-grinders 28, namely so-called angle grinders. They are attached to an output shaft 29 of the grinding machine 28, which is inserted through the central opening 3, so that the center axis 4 of the support plate 1 coincides with the corresponding center axis of the output shaft 29. The attachment of the grinding wheel on the output shaft 29 by means of a clamping nut 30th

Der Einsatz der Schleifscheibe erfolgt an einem zu bearbeitenden Werkstück 31 in der Weise, dass die Schleifscheibe mit dem Schleiflamellen-Paket 10 schräg auf dem zu bearbeitenden Werkstück 31 aufgesetzt wird.The use of the grinding wheel takes place on a workpiece 31 to be machined in such a way that the grinding wheel with the grinding lamella package 10 is placed obliquely on the workpiece 31 to be machined.

Claims (9)

  1. Flap grinding wheel, which is rotary drivable in a direction of rotation (15) comprising
    - a support plate (1) which has
    - - a middle axis (4),
    - - an inner hub (2) and
    - - an annular edge area (5),
    - grinding lamellae (6, 6') which
    - - have an external edge (11, 11') and a rear edge (14, 14'),
    - - are made from synthetic resin bound grinding means (22) on a support fabric (23) comprising warp threads (24) and weft threads (25),
    - - cover the support plate (1, 1') in its circumferential direction at a covering angle α, in which α ≥ 70° and
    - - are arranged on the edge area (5) forming an annular grinding lamellae package (10, 10') at equal angular distances such that
    - -- the external edge (11, 11') delimits part of an external edge (12) of the grinding lamellae package (10,10'),
    - -- each grinding lamella is partly covered by grinding lamellae (6, 6') arranged in front in rotational direction (15) and
    - -- the rear edge (14,14') is open,
    characterised
    in that the support fabric (23) is designed to be virtually isotropic in terms of tension with a tensile strength F24 in the direction of the warp threads (24) of 2,000 N/50 mm ≤ F24 ≤ 5,000 N/50 mm,
    with a tensile strength F25 in the direction of the weft threads (25) of 2,000 N/50 mm ≤ F25 ≤ 5,000 N/50 mm and in a ratio of 0.75 ≤ F24/F25 ≤ 1.25 and in that the support fabric (23) has a basis weight of 100 to 400 g/m2.
  2. Flap grinding wheel according to claim 1, characterised in that for the tensile strength F24 of the support fabric (23) in the direction of the warp threads (24) and the tensile strength F25 in the direction of the weft threads (25): 0.9 ≤ F24/F25 ≤ 1.1.
  3. Flap grinding wheel according to claim 2, characterised in that for the tensile strength F24 of the support fabric (23) in the direction of the warp threads (24) and the tensile strength F25 in the direction of the weft threads (25): 0.95 ≤ F24/F25 ≤ 1.05.
  4. Flap grinding wheel according to one of claims 1 to 3, characterised in that for the covering angle α: α ≥ 110°.
  5. Flap grinding wheel according to one of claims 1 to 4, characterised in that for the ratio of the extension a of the grinding lamellae (6, 6') in circumferential direction of the grinding lamellae package (10) in the region of the external edge (12) in relation to the greatest extension b in a direction radial to the middle axis (4): 1.5 ≤ a/b.
  6. Flap grinding wheel according to one of claims 1 to 5, characterised in that for the ratio of the extension a' of the grinding lamellae (6') in circumferential direction of the grinding lamellae package (10') in the region of the external edge (12) in relation to the greatest extension b' in a direction radial to the middle axis (4): 2.5 ≤ a'/b'.
  7. Flap grinding wheel according to one of claims 1 to 6, characterised in that the external edge (11, 11') of the grinding lamellae (6, 6') is curved to be in the form of a section of an arc.
  8. Flap grinding wheel according to one of claims 1 to 7, characterised in that the rear edge (14') of the grinding lamellae (6') is designed to be in a straight line.
  9. Flap grinding wheel according to one of claims 1 to 8, characterised in that the support fabric (23) comprises a twill binding.
EP08014589A 2008-08-16 2008-08-16 Flap grinding wheel Active EP2153939B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
PL08014589T PL2153939T3 (en) 2008-08-16 2008-08-16 Flap grinding wheel
SI200830145T SI2153939T1 (en) 2008-08-16 2008-08-16 Flap grinding wheel
EP08014589A EP2153939B1 (en) 2008-08-16 2008-08-16 Flap grinding wheel
ES08014589T ES2352066T3 (en) 2008-08-16 2008-08-16 ABRASIVE MUELA IN FAN.
AT08014589T ATE486694T1 (en) 2008-08-16 2008-08-16 FAN GRINDING DISC
DE502008001730T DE502008001730D1 (en) 2008-08-16 2008-08-16 Fan wheel
PCT/EP2009/004275 WO2010020301A1 (en) 2008-08-16 2009-06-13 Blower grinding disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08014589A EP2153939B1 (en) 2008-08-16 2008-08-16 Flap grinding wheel

Publications (2)

Publication Number Publication Date
EP2153939A1 EP2153939A1 (en) 2010-02-17
EP2153939B1 true EP2153939B1 (en) 2010-11-03

Family

ID=40263340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08014589A Active EP2153939B1 (en) 2008-08-16 2008-08-16 Flap grinding wheel

Country Status (7)

Country Link
EP (1) EP2153939B1 (en)
AT (1) ATE486694T1 (en)
DE (1) DE502008001730D1 (en)
ES (1) ES2352066T3 (en)
PL (1) PL2153939T3 (en)
SI (1) SI2153939T1 (en)
WO (1) WO2010020301A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102179776A (en) * 2011-03-22 2011-09-14 谢泽 Energy-saving sand-leaf disc
DE102012004212A1 (en) * 2012-03-06 2013-09-12 Illinois Tool Works Inc. Disc for cutting and / or grinding
ITMI20130734A1 (en) * 2013-05-07 2014-11-08 Ren S R L ABRASIVE TOOL
BR112018003397B1 (en) * 2015-08-21 2021-06-01 August Rüggeberg Gmbh & Co. Kg WHEELING AND METHOD FOR MANUFACTURING IT
WO2017032397A1 (en) * 2015-08-21 2017-03-02 August Rüggeberg Gmbh & Co. Kg Grinding tool, and method for producing such a grinding tool
CN105729319B (en) * 2016-03-16 2018-01-12 台州市黄岩豪林抛光磨具有限公司 A kind of emery cloth plate matrix and processing method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004010125U1 (en) * 2004-06-28 2005-12-01 Hermes Schleifmittel Gmbh & Co. Kg Lamellae grinding tool, has lamella extending radially outwards from core, where part of lamellae exhibits fibrous web material that has grinding core and reinforcing strengthening material is connected with fibrous web material
DE102006024015A1 (en) 2006-05-23 2007-11-29 August Rüggeberg Gmbh & Co. Kg Fan wheel

Also Published As

Publication number Publication date
SI2153939T1 (en) 2011-03-31
DE502008001730D1 (en) 2010-12-16
WO2010020301A1 (en) 2010-02-25
ATE486694T1 (en) 2010-11-15
PL2153939T3 (en) 2011-04-29
ES2352066T3 (en) 2011-02-15
EP2153939A1 (en) 2010-02-17

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