EP0566761B1 - Flapsanding disc - Google Patents

Flapsanding disc Download PDF

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Publication number
EP0566761B1
EP0566761B1 EP19920106917 EP92106917A EP0566761B1 EP 0566761 B1 EP0566761 B1 EP 0566761B1 EP 19920106917 EP19920106917 EP 19920106917 EP 92106917 A EP92106917 A EP 92106917A EP 0566761 B1 EP0566761 B1 EP 0566761B1
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EP
European Patent Office
Prior art keywords
ring
clamping
plate
clamping ring
disc according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19920106917
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German (de)
French (fr)
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EP0566761A1 (en
Inventor
Guenter Wendt Gmbh Dipl.-Ing.
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.)
Guenter Wendt Dipl Ing GmbH
Original Assignee
Guenter Wendt Dipl Ing 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 Guenter Wendt Dipl Ing GmbH filed Critical Guenter Wendt Dipl Ing GmbH
Priority to ES92106917T priority Critical patent/ES2107478T3/en
Priority to EP19920106917 priority patent/EP0566761B1/en
Priority to DE59208818T priority patent/DE59208818D1/en
Publication of EP0566761A1 publication Critical patent/EP0566761A1/en
Application granted granted Critical
Publication of EP0566761B1 publication Critical patent/EP0566761B1/en
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
    • 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
    • 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

Definitions

  • the invention relates to a flap grinding wheel with a circular support plate, which is provided with a coaxial clamping opening for connection to the motor shaft and on the front of which scales-like overlapping grinding flaps are fastened with adhesive.
  • This flap grinding wheel known from DE-U-88 16 445 is attached directly to the motor shaft by means of a screw. After the flap disc has been used up, it is detached from the machine and replaced with a new disc. Clamping and unclamping the disc is laborious and time-consuming and results in machine downtimes. The material consumption is considerable since the entire grinding wheel is discarded when worn.
  • the invention has for its object to provide a lamellar grinding wheel, which can be changed faster and more easily than the known wheels after consumption, so that the interruption times are reduced.
  • the cost of materials for the grinding wheel should also be reduced. Further advantages result from the description below.
  • the support plate consists of a plate ring carrying the grinding lamellae and a clamping ring which can be screwed into its opening from the back of the plate ring and has the clamping opening.
  • the clamping ring remains clamped on when changing the wheel Motor shaft. Only the plate ring with the used grinding plates is released from the clamping ring and replaced with a plate ring with new grinding plates.
  • the opening is expediently delimited by a cylindrical or conical inside of the plate ring, and the clamping ring accordingly has a cylindrical or conical outside.
  • Corresponding threads are preferably formed on the inside of the plate ring and on the outside of the clamping ring.
  • the clamping ring and the plate ring are preferably provided with a multi-start, e.g. three-start thread.
  • the pitch of the threads is preferably in the range from 8 to 20 mm, in particular in the range from 10 to 14 mm. Due to the relatively large pitch of the threads, it is possible to detach the plate ring from the clamping ring relatively easily after the grinding lamella has worn out.
  • the pitch of the threads of the cup ring and the pitch of the scaled lamellae are opposite.
  • the thread between the ring and the clamping ring is tightened at the same time, so that the disk is securely attached becomes.
  • a stop collar limiting the mutual screwing movement of the two rings is expediently formed on the clamping ring and / or the plate ring.
  • the torque then effective on the plate ring causes the two rings to be held in the stop position.
  • the clamping ring and the plate ring can consist of the same or different material.
  • the clamping ring is made of metal, e.g. Light metal, and the plate ring made of plastic. This takes account of the fact that the plate ring only needs to have a service life corresponding to the wear time of the grinding flaps, while the clamping ring must have a longer service life.
  • the clamping flange of the clamping ring is expediently located on the back of this ring, i.e. the side facing away from the grinding flap layer. This simplifies the clamping of the clamping ring and resets the clamping from the grinding plane.
  • the lamellae consist, for example, of abrasive cloth and are connected to one another and to the ring 1, for example with a synthetic resin adhesive.
  • the plate ring has a coaxial cylindrical opening 3, which serves to receive a clamping ring 4.
  • three separate partial threads 6 are formed, of which only two are visible in FIG. 1 in the view of the inside 5.
  • the clamping ring 4 has a cylindrical outside 7, on which three partial threads 8 are also provided (see FIGS. 2 and 3), which allow the clamping ring 4 to be screwed into the opening 3 in the ring 1.
  • a circumferential collar 9 is formed on the back of the clamping ring 4 and comes into contact with the opening 3 on the back of the ring 1 after the clamping ring 4 has been screwed in completely, thereby limiting the screwing-in process. It can be seen from the axial section of the clamping ring shown in FIG. 3 that this ring has an inner flange 10 with a coaxial circular opening 11 on the back in the plane coinciding with the collar 9. The flange 10 with the opening 11 is used to clamp the clamping ring 4 onto the shaft of a motor, the flange 10 lying behind the grinding plane allowing clamping without impairing the grinding process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

Die Erfindung betrifft eine Lamellenschleifscheibe mit einem kreisförmigen Tragteller, der mit einer koaxialen Einspannöffnung zur Verbindung mit der Motorwelle versehen ist und auf dessen Vorderseite sich schuppenartig überdeckende Schleiflamellen mit Klebstoff befestigt sind.The invention relates to a flap grinding wheel with a circular support plate, which is provided with a coaxial clamping opening for connection to the motor shaft and on the front of which scales-like overlapping grinding flaps are fastened with adhesive.

Diese aus DE-U-88 16 445 bekannte Lamellenschleifscheibe wird mittels einer Schraube direkt auf der Motorwelle befestigt. Nachdem die Lamellenschleifscheibe verbraucht ist, wird sie von der Maschine gelöst und durch eine neue Scheibe ersetzt. Das Auf- und Abspannen der Scheibe ist arbeits- und zeitaufwendig und hat Stillstandszeiten der Maschine zur Folge. Der Materialverbrauch ist erheblich, da bei Abnutzung die ganze Schleifscheibe verworfen wird.This flap grinding wheel known from DE-U-88 16 445 is attached directly to the motor shaft by means of a screw. After the flap disc has been used up, it is detached from the machine and replaced with a new disc. Clamping and unclamping the disc is laborious and time-consuming and results in machine downtimes. The material consumption is considerable since the entire grinding wheel is discarded when worn.

Der Erfindung liegt die Aufgabe zugrunde, eine Lamellenschleifscheibe zu schaffen, die nach Verbrauch schneller und müheloser als die bekannten Scheiben gewechselt werden kann, so daß die Unterbrechungszeiten verkürzt werden. Darüber hinaus soll auch der Materialaufwand für die Schleifscheibe verringert werden. Weitere Vorteile ergeben sich aus der nachfolgenden Beschreibung.The invention has for its object to provide a lamellar grinding wheel, which can be changed faster and more easily than the known wheels after consumption, so that the interruption times are reduced. In addition, the cost of materials for the grinding wheel should also be reduced. Further advantages result from the description below.

Diese Aufgabe wird bei der eingangs genannten Lamellenschleifscheibe erfindungsgemäß dadurch gelöst, daß der Tragteller aus einem die Schleiflamellen tragenden Tellerring und einem von der Rückseite des Tellerrings in seine Durchbrechung einschraubbaren, die Einspannöffnung aufweisenden Einspannring besteht. Bei der erfindungsgemäßen Lamellenschleifscheibe mit zweiteiligem Tragteller bleibt der Einspannring beim Scheibenwechsel eingespannt auf der Motorwelle. Lediglich der Tellerring mit den verbrauchten Schleiflamellen wird vom Einspannring gelöst und durch einen Tellerring mit neuen Schleiflamellen ersetzt. Dieser Austausch des Tellerrings erfordert weniger Zeit und Arbeit als das Aus- und Einspannen der ganzen Scheibe, da der Tellerring mit den abgenutzten Schleiflamellen durch einen einzigen Schraubvorgang von dem auf der Welle verbleibenden Einspannring gelöst bzw. auf ihm befestigt werden kann. Da der die Schleiflamellen tragende auszutauschende Tellerring weniger Material als die herkömmliche Scheibe mit einteiligem Tragteller erfordert, ergibt sich auch insofern eine Kosteneinsparung.This object is achieved in the above-mentioned lamellar grinding wheel in that the support plate consists of a plate ring carrying the grinding lamellae and a clamping ring which can be screwed into its opening from the back of the plate ring and has the clamping opening. In the lamellar grinding wheel according to the invention with a two-part support plate, the clamping ring remains clamped on when changing the wheel Motor shaft. Only the plate ring with the used grinding plates is released from the clamping ring and replaced with a plate ring with new grinding plates. This exchange of the plate ring requires less time and work than unclamping and clamping the entire disc, since the plate ring with the worn grinding lamellae can be detached from or attached to the clamping ring remaining on the shaft with a single screwing operation. Since the plate ring to be replaced, which carries the grinding flaps, requires less material than the conventional disc with a one-piece support plate, this also results in a cost saving.

Zweckmäßigerweise ist die Durchbrechung von einer zylindrischen oder konischen Innenseite desTellerrings begrenzt, und hat der Einspannring dementsprechend eine zylindrische bzw. konische Außenseite. Dabei sind vorzugsweise auf der Innenseite des Tellerrings und auf der Außenseite des Einspannrings korrespondierende Gewindegänge ausgebildet. Vorzugsweise sind der Einspannring und der Tellerring mit einem mehrgängigen, z.B. dreigängigen Gewinde versehen. Die Steigung der Gewindegänge liegt vorzugsweise in dem Bereich von 8 bis 20 mm, insbesondere in dem Bereich von 10 bis 14 mm. Durch die relativ große Steigung der Gewindegänge ist es möglich, den Tellerring nach Abnutzung der Schleiflamellen relativ leicht vom Einspannring zu lösen.The opening is expediently delimited by a cylindrical or conical inside of the plate ring, and the clamping ring accordingly has a cylindrical or conical outside. Corresponding threads are preferably formed on the inside of the plate ring and on the outside of the clamping ring. The clamping ring and the plate ring are preferably provided with a multi-start, e.g. three-start thread. The pitch of the threads is preferably in the range from 8 to 20 mm, in particular in the range from 10 to 14 mm. Due to the relatively large pitch of the threads, it is possible to detach the plate ring from the clamping ring relatively easily after the grinding lamella has worn out.

Nach der bevorzugten Ausführungsform der Erfindung sind die Steigung der Gewindegänge des Tellerrings und die Steigung der schuppenartig angeordneten Schleiflamellen entgegengesetzt. Rotiert bei dieser Anordnung die Scheibe in der Weise auf dem Werkstück, daß die Lamellen "mit dem Strich" beaufschlagt werden, wird gleichzeitig das Gewinde zwischen Tellerring und Spannring festgezogen, so daß eine sichere Befestigung der Scheibe gewährleistet wird.According to the preferred embodiment of the invention, the pitch of the threads of the cup ring and the pitch of the scaled lamellae are opposite. In this arrangement, if the disk rotates on the workpiece in such a way that the lamellae are "streaked", the thread between the ring and the clamping ring is tightened at the same time, so that the disk is securely attached becomes.

Zweckmäßigerweise ist an dem Einspannring und/oder dem Tellerring ein die gegenseitige Schraubbewegung der beiden Ringe begrenzender Anschlagbund ausgebildet. Bei der Benutzung der Lamellenschleifscheibe bewirkt das dann am Tellerring wirksame Drehmoment, daß die beiden Ringe in der Anschlagposition gehalten werden.A stop collar limiting the mutual screwing movement of the two rings is expediently formed on the clamping ring and / or the plate ring. When using the lamellar grinding wheel, the torque then effective on the plate ring causes the two rings to be held in the stop position.

Bei der erfindungsgemäßen Scheibe mit zweiteiligem Tragteller können der Einspannring und der Tellerring aus gleichem oder aus unterschiedlichem Material bestehen. Vorzugsweise besteht der Einspannring aus Metall, z.B. Leichtmetall, und der Tellerring aus Kunststoff. Dadurch wird dem Rechnung getragen, daß der Tellerring nur eine der Abnutzungszeit der Schleiflamellen entsprechende Standzeit zu haben braucht, während der Einspannring eine längere Lebensdauer haben muß.In the disc according to the invention with a two-part support plate, the clamping ring and the plate ring can consist of the same or different material. Preferably the clamping ring is made of metal, e.g. Light metal, and the plate ring made of plastic. This takes account of the fact that the plate ring only needs to have a service life corresponding to the wear time of the grinding flaps, while the clamping ring must have a longer service life.

Zweckmäßigerweise ist der Spannflansch des Einspannrings an der Rückseite dieses Rings, d.h. der der Schleiflamellenlage abgewandten Seite ausgebildet. Hierdurch wird das Einspannen des Einspannrings erleichtert und die Einspannung von der Schleifebene zurückgesetzt.The clamping flange of the clamping ring is expediently located on the back of this ring, i.e. the side facing away from the grinding flap layer. This simplifies the clamping of the clamping ring and resets the clamping from the grinding plane.

Die Erfindung wird nachfolgend an Hand der Zeichnung näher beschrieben. Es zeigen

  • Figur 1 den Axialschnitt des Tellerrings einer ersten Ausführungsform der erfindungsgemäßen Lamellenschleifscheibe;
  • Figur 2 die Seitenansicht des zu dem Tellerring nach Figur 1 gehörigen Einspannrings;
  • Figur 3 den Axialschnitt des Einspannrings nach Figur 2; und
  • Figur 4 die Draufsicht auf einen Quadranten der zweiteiligen Scheibe nach den Figuren 1 bis 3.
The invention is described below with reference to the drawing. Show it
  • Figure 1 shows the axial section of the cup ring of a first embodiment of the lamellar grinding wheel according to the invention;
  • FIG. 2 shows the side view of the clamping ring belonging to the plate ring according to FIG. 1;
  • 3 shows the axial section of the clamping ring according to FIG. 2; and
  • 4 shows the top view of a quadrant of the two-part disk according to FIGS. 1 to 3.

Nach dem in Figur 1 gezeigten Schnitt ist auf die Vorderseite 1a des Tellerrings 1 eine Schicht aus schuppenartig übereinander geschobenen Schleiflamellen 2 mittels eines Klebstoffs aufgeklebt. Die Lamellen bestehen beispielsweise aus Schleifleinen und sind z.B. mit einem Kunstharzkleber untereinander und mit dem Tellerring 1 verbunden. Der Tellerring hat eine koaxiale zylindrische Durchbrechung 3, die zur Aufnahme eines Einspannrings 4 dient. Auf der Innenseite 5 des Tellerings 1 sind drei separate Teilgewindegänge 6 ausgebildet, von denen in Figur 1 in der Ansicht der Innenseite 5 nur zwei sichtbar sind.According to the section shown in FIG. 1, a layer of abrasive flaps 2, which are pushed over one another in the manner of scales, is glued onto the front 1 a of the plate ring 1 using an adhesive. The lamellae consist, for example, of abrasive cloth and are connected to one another and to the ring 1, for example with a synthetic resin adhesive. The plate ring has a coaxial cylindrical opening 3, which serves to receive a clamping ring 4. On the inside 5 of the plate ring 1, three separate partial threads 6 are formed, of which only two are visible in FIG. 1 in the view of the inside 5.

Der Einspannring 4 hat eine zylindrische Außenseite 7, auf der ebenfalls drei Teilgewindegänge 8 vorgesehen sind (vergl. Figuren 2 und 3), die es gestatten, den Einspannring 4 in die Durchbrechung 3 des Tellerrings 1 einzuschrauben. An der Rückseite des Einspannrings 4 ist ein umlaufender Bund 9 angeformt, der nach dem vollständigen Einschrauben des Spannrings 4 in die Durchbrechung 3 auf der Rückseite des Tellerrings 1 zur Anlage kommt und dadurch den Einschraubvorgang begrenzt. Aus dem in Figur 3 gezeigten Axialschnitt des Einspannrings ist ersichtlich, daß dieser Ring rückseitig in der mit dem Bund 9 zusammenfallenden Ebene einen Innenflansch 10 mit koaxialer kreisförmiger Öffnung 11 aufweist. Der Flansch 10 mit der Öffnung 11 dient zum Aufspannen des Einspannrings 4 auf die Welle eines Motors, wobei der gegenüber der Schleifebene zurückliegende Flansch 10 eine Einspannung ohne Beeinträchtigung des Schleifvorgangs ermöglicht.The clamping ring 4 has a cylindrical outside 7, on which three partial threads 8 are also provided (see FIGS. 2 and 3), which allow the clamping ring 4 to be screwed into the opening 3 in the ring 1. A circumferential collar 9 is formed on the back of the clamping ring 4 and comes into contact with the opening 3 on the back of the ring 1 after the clamping ring 4 has been screwed in completely, thereby limiting the screwing-in process. It can be seen from the axial section of the clamping ring shown in FIG. 3 that this ring has an inner flange 10 with a coaxial circular opening 11 on the back in the plane coinciding with the collar 9. The flange 10 with the opening 11 is used to clamp the clamping ring 4 onto the shaft of a motor, the flange 10 lying behind the grinding plane allowing clamping without impairing the grinding process.

Aus der in Figur 4 gezeigten Draufsicht ist die schuppenartige Aufeinanderlage der Schleiflamellen 2 auf dem Tellerring 1 ersichtlich. Dabei ist erkennbar, daß die Neigung der einzelnen Schleiflamellen 2 in Bezug auf die Achse 12 der Scheibe entgegengesetzt der Neigung der Gewindegänge 6 ist (vergl. auch Figur 1).From the plan view shown in Figure 4 is the scale-like superposition of the grinding lamella 2 on the plate ring 1 can be seen. It can be seen that the inclination of the individual grinding flaps 2 with respect to the axis 12 of the disk is opposite to the inclination of the threads 6 (see also FIG. 1).

Claims (8)

  1. Flapsansing disc with a circular support plate which is provided with a coaxial clamping aperture for coupling to the motor shaft and on the front of which flaky sanding flaps are fastened by an adhesive, characterized in that the support plate consists of a plate ring (1) carrying the sanding flaps (2) and a clamping ring (4) having the clamping aperture (11) and being adapted to be screwed into the opening (3) of the plate ring (1) from its rear side.
  2. Disc according to claim 1, characterized in that the opening (3) is limited by a cylindrical or conical inner side (5) of the plate ring (1), and the clamping ring (4) accordingly has a cylindrical or conical outside (7).
  3. Disc according to claim 2, characterized in that threads (6,8) are formed on the inner side (5) of the plate ring (1) and on the outside (7) of the clamping ring (4).
  4. Disc according to any of the claims 1 to 3, characterized in that the clamping ring (4) and the plate ring (1) are provided with a multiple, preferably a triple to a sextuple thread (6,8).
  5. Disc according to any of the claims 1 to 4, characterized in that the pitch of the screw threads (6) of the plate ring (1) is opposite to the pitch of the flakily arranged sanding flaps (2).
  6. Disc according to any of the claims 1 to 5, characterized in that a stop collar (9) is formed at the clamping ring (4) and/or at the plate ring (1) said stop collar limiting the mutual screw movement of both rings.
  7. Disc according to any of the claims 1 to 6, characterized in that the clamping ring (4) consists of metal or plastics and the plate ring (1) consists of plastics or metal.
  8. Disc according to any of the claims 1 to 7, characterized in that an interior flange (10) is formed at the rear side of the clamping ring (4).
EP19920106917 1992-04-22 1992-04-22 Flapsanding disc Expired - Lifetime EP0566761B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES92106917T ES2107478T3 (en) 1992-04-22 1992-04-22 LAMINAR ABRASIVE DISC.
EP19920106917 EP0566761B1 (en) 1992-04-22 1992-04-22 Flapsanding disc
DE59208818T DE59208818D1 (en) 1992-04-22 1992-04-22 Flap grinding wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19920106917 EP0566761B1 (en) 1992-04-22 1992-04-22 Flapsanding disc

Publications (2)

Publication Number Publication Date
EP0566761A1 EP0566761A1 (en) 1993-10-27
EP0566761B1 true EP0566761B1 (en) 1997-08-20

Family

ID=8209565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920106917 Expired - Lifetime EP0566761B1 (en) 1992-04-22 1992-04-22 Flapsanding disc

Country Status (3)

Country Link
EP (1) EP0566761B1 (en)
DE (1) DE59208818D1 (en)
ES (1) ES2107478T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430229A1 (en) * 1994-08-25 1996-02-29 Eisenblaetter Gerd Gmbh Overlapping leaf abrasive disc esp. for attachment to grinder or sander
US5964006A (en) * 1997-01-13 1999-10-12 3M Innovative Properties Company Rotary surface treatment tool
DE20106228U1 (en) 2001-04-09 2001-06-28 Jobra Metall Gmbh Carrier plate for flap discs
DK176743B1 (en) 2003-04-25 2009-06-02 Flex Trim As Sanding disc with sandpaper blanks
DE102004040901A1 (en) * 2004-03-31 2005-10-20 Stephan Rieth Grinding head for a grinding device
DE102004022944B3 (en) * 2004-05-10 2005-08-18 Jobra Gmbh Support plate for lamella grinding disks comprises an outer flange for grinding lamellae and an inner part with a receiving bore for a detachable fixing ring of the drive shaft of a motor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2657509A (en) * 1951-04-02 1953-11-03 Turton Arthur Detaching means for abrasive disks
US3562968A (en) * 1969-03-12 1971-02-16 Minnesota Mining & Mfg Surface treating tool
US4683683A (en) * 1985-08-19 1987-08-04 Aleck Block Abrasive material mounting structure
DE8816445U1 (en) * 1988-11-21 1989-09-28 Leurop Leutheusser Kg, 8592 Wunsiedel, De

Also Published As

Publication number Publication date
ES2107478T3 (en) 1997-12-01
EP0566761A1 (en) 1993-10-27
DE59208818D1 (en) 1997-09-25

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