EP0459138B1 - Grinding tool - Google Patents

Grinding tool Download PDF

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Publication number
EP0459138B1
EP0459138B1 EP91106421A EP91106421A EP0459138B1 EP 0459138 B1 EP0459138 B1 EP 0459138B1 EP 91106421 A EP91106421 A EP 91106421A EP 91106421 A EP91106421 A EP 91106421A EP 0459138 B1 EP0459138 B1 EP 0459138B1
Authority
EP
European Patent Office
Prior art keywords
drive pin
grinding disc
grinding
edge strip
grinding plate
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
EP91106421A
Other languages
German (de)
French (fr)
Other versions
EP0459138A1 (en
Inventor
Heinz Zerfass
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0459138A1 publication Critical patent/EP0459138A1/en
Application granted granted Critical
Publication of EP0459138B1 publication Critical patent/EP0459138B1/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
    • 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 plate for grinding and deburring (removing) cutting tools with a drive pin which is connected at one end to a grinding plate and can engage with the other in the drill head of a hand drill.
  • Such a grinding disc is described, for example, in DE-PS 35 16 474 and, apart from the grinding sheet to be glued to the round disc surface, consists of two parts, namely a solid disc which is made of plastic on its peripheral surface, and a metallic drive pin , which is accommodated in an axially continuous bore in the cylinder disk.
  • the free end of this drive pin is inserted into the drill head of a drilling machine, so that it can absorb a torque from the drill head and deliver it to the other end of the drive pin, which is in the bore of the cylinder disk.
  • the invention has for its object to rid a grinding plate of the type mentioned of the disadvantages and simplify construction in such a way that the cost price is more than halved.
  • the grinding plate has an edge strip bent to form a cylinder jacket running coaxially to the drive pin, the edge strip being wider than the thickness of the grinding plate, and in that the drive pin is made of plastic in one piece with the grinding plate and the cylindrical edge strip, and in that the drive pin has a non-circular end piece offset by a shoulder.
  • the grinding plate 1 is made in one piece together with the drive pin 6 and a coaxial cylindrical edge strip 3 and made of plastic.
  • the cylindrical edge strip 3 can be chosen to be of any width without the grinding plate 1 having to increase in thickness as a whole.
  • the one-piece joint production of the drive pin 6 with the grinding plate 1 ensures that the torque from the drilling head 9 of a drilling machine is safely received via the non-circular end piece 8 offset by a shoulder 7 and is transmitted to the grinding plate 1 at the other end. Every workload and every problem at the transition or connection point between is eliminated Drive pin 6 and the sanding plate 1.
  • the grinding sheet 4 is glued onto the round end face 2 of the grinding plate 1 by means of the known adhesive 5.

Landscapes

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

Abstract

Grinding disc (1) with a drive pin (6) and a marginal strip (3) which is bent over to form a cylinder shell, is in one piece with the drive pin (6) and is made of plastic. <IMAGE>

Description

Die Erfindung betrifft einen Schleifteller zum Schleifen und Entgraten (Abziehen) von Schneidwerkzeugen mit einem Antriebsstift, der mit einem Ende mit einem Schleifteller verbunden ist und mit dem anderen in den Bohrkopf einer Handbohrmaschine eingreifen kann.The invention relates to a grinding plate for grinding and deburring (removing) cutting tools with a drive pin which is connected at one end to a grinding plate and can engage with the other in the drill head of a hand drill.

Ein derartiger Schleifteller wird beispielsweise in der DE-PS 35 16 474 beschrieben und besteht, abgesehen von dem auf der runden Tellerfläche aufzuklebendem Schleifblatt, aus zwei Teilen, nämlich aus einer massiven Scheibe, die auf ihrer Umfangsfläche aus Kunststoff besteht, und aus einem metallischen Antriebsstift, der in einer axial durchgehenden Bohrung in der Zylinderscheibe Aufnahme findet. Das freie Ende dieses Antriebsstiftes wird in den Bohrkopf einer Bohrmaschine hineingesteckt, so daß es vom Bohrkopf ein Drehmoment aufnehmen und an das andere Ende des Antriebsstiftes abgeben kann, welches in der Bohrung der Zylinderscheibe steckt.Such a grinding disc is described, for example, in DE-PS 35 16 474 and, apart from the grinding sheet to be glued to the round disc surface, consists of two parts, namely a solid disc which is made of plastic on its peripheral surface, and a metallic drive pin , which is accommodated in an axially continuous bore in the cylinder disk. The free end of this drive pin is inserted into the drill head of a drilling machine, so that it can absorb a torque from the drill head and deliver it to the other end of the drive pin, which is in the bore of the cylinder disk.

Die Schaffung einer festen Verbindung zwischen dem Antriebsstift und der Zylinderscheibe schafft herstellungstechnische Probleme und führt nach längerer Betriebszeit zu einer Lockerung. Eine Abhilfemaßnahme, die aus der Einbringung von Klebstoff in die Bohrung bestand, erwies sich als unzuverlässig. Das Einbringen und Festhalten des metallischen Antriebsstiftes in einer axialen Bohrung in der Zylinderscheibe erfordert überdies, daß die Zylinderscheibe verhältnismäßig dick sein muß, damit die zentrale Bohrung nicht zu kurz ist. Ferner tritt beim Einbringen und Befestigen eines losen Antriebsstiftes in der Bohrung des Schleiftellers der Nachteil auf, daß der Antriebsstift keine genau lotrechte Position zum Schleifteller einnimmt, so daß dieser im Betrieb wie eine Taumelscheibe flattert und das Schleifen erschwert.The creation of a fixed connection between the drive pin and the cylindrical disk creates manufacturing problems and leads to loosening after a long period of operation. A remedy, which consisted of putting glue into the hole, proved to be unreliable. The introduction and retention of the metallic drive pin in an axial bore in the cylinder disk also requires that the cylinder disk must be relatively thick so that the central bore is not too short. Furthermore, when inserting and attaching a loose drive pin in the bore of the grinding plate, the disadvantage arises that the drive pin does not assume an exactly perpendicular position with respect to the grinding plate, so that it flutters during operation like a swash plate and makes grinding difficult.

Der Erfindung liegt die Aufgabe zugrunde, einen Schleifteller der genannten Art von den aufgezeigten Nachteilen zu befreien und baulich derart zu vereinfachen, daß der Gestehungspreis mehr als halbiert wird.The invention has for its object to rid a grinding plate of the type mentioned of the disadvantages and simplify construction in such a way that the cost price is more than halved.

Gelöst wird diese Aufgabe dadurch, daß der Schleifteller einen zu einem koaxial zum Antriebsstift verlaufenden Zylindermantel umgebogenen Randstreifen aufweist, wobei der Randstreifen breiter als die Dicke des Schleiftellers ist, und daß der Antriebsstift einstückig mit dem Schleifteller und dem zylindrischen Randstreifen aus Kunststoff besteht, und daß der Antriebsstift ein durch eine Schulter abgesetztes unrundes Endstück besitzt.This object is achieved in that the grinding plate has an edge strip bent to form a cylinder jacket running coaxially to the drive pin, the edge strip being wider than the thickness of the grinding plate, and in that the drive pin is made of plastic in one piece with the grinding plate and the cylindrical edge strip, and in that the drive pin has a non-circular end piece offset by a shoulder.

Nachfolgend wird anhand der Zeichnung eine Ausführungsform nach der Erfindung näher erläutert.An embodiment according to the invention is explained in more detail below with reference to the drawing.

Es zeigen :

Figur 1 :
einen Längsschnitt durch einen Schleifteller in Seitenansicht gesehen, etwa in natürlicher Größe und
Figur 2 :
eine Unteransicht des Gegenstandes nach Figur 1 in Richtung des Pfeils II in Figur 1 gesehen.
Show it :
Figure 1:
seen a longitudinal section through a grinding plate in side view, approximately in natural size and
Figure 2:
seen a bottom view of the object of Figure 1 in the direction of arrow II in Figure 1.

Der Schleifteller 1 ist zusammen mit dem Antriebsstift 6 und einem koaxialen zylindrischen Randstreifen 3 einstückig und aus Kunststoff hergestellt.The grinding plate 1 is made in one piece together with the drive pin 6 and a coaxial cylindrical edge strip 3 and made of plastic.

Wegen dieser gemeinsamen Herstellung der genannten Teile aus einem Stück kann der zylindrische Randstreifen 3 beliebig breit gewählt werden, ohne daß der Schleifteller 1 als ganzes an Dicke zunehmen muß.Because of this joint production of the above-mentioned parts from one piece, the cylindrical edge strip 3 can be chosen to be of any width without the grinding plate 1 having to increase in thickness as a whole.

Ferner gibt die einstückige gemeinsame Herstellung des Antriebsstiftes 6 mit dem Schleifteller 1 die sichere Gewähr, daß das Drehmoment vom Bohrkopf 9 einer Bohrmaschine über das durch eine Schulter 7 abgesetzte unrunde Endstück 8 sicher aufgenommen und am anderen Ende auf den Schleifteller 1 übertragen wird. Es entfällt jeder Arbeitsaufwand und jede Problematik an der Übergangs- bzw. Verbindungsstelle zwischen Antriebsstift 6 und dem Schleifteller 1.Furthermore, the one-piece joint production of the drive pin 6 with the grinding plate 1 ensures that the torque from the drilling head 9 of a drilling machine is safely received via the non-circular end piece 8 offset by a shoulder 7 and is transmitted to the grinding plate 1 at the other end. Every workload and every problem at the transition or connection point between is eliminated Drive pin 6 and the sanding plate 1.

Auf der runden Stirnfläche 2 des Schleiftellers 1 ist mittels des bekannten Klebmittels 5 das Schleifblatt 4 aufgeklebt.The grinding sheet 4 is glued onto the round end face 2 of the grinding plate 1 by means of the known adhesive 5.

Claims (1)

  1. Grinding disc (1) for grinding and deburring cutting tools, which comprises a drive pin (6) which is connected at one end to a grinding disc and by its other end can engage in the drill head of a hand drill, characterized in that the grinding disc (1) has an edge strip (3) bent over to form a cylindrical shell extending coaxially to the drive pin, the edge strip being wider than the thickness of the grinding disc, in that the drive pin is made of plastics material integrally with the grinding disc (1) and the cylindrical edge strip (3), and in that the drive pin has a non-circular end piece (8) stepped down by a shoulder (7).
EP91106421A 1990-04-26 1991-04-22 Grinding tool Expired - Lifetime EP0459138B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4013364 1990-04-26
DE4013364A DE4013364A1 (en) 1990-04-26 1990-04-26 GRINDING PLATE

Publications (2)

Publication Number Publication Date
EP0459138A1 EP0459138A1 (en) 1991-12-04
EP0459138B1 true EP0459138B1 (en) 1995-01-11

Family

ID=6405167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106421A Expired - Lifetime EP0459138B1 (en) 1990-04-26 1991-04-22 Grinding tool

Country Status (3)

Country Link
EP (1) EP0459138B1 (en)
AT (1) ATE116889T1 (en)
DE (2) DE4013364A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19729125C1 (en) * 1997-07-08 1999-03-04 Heinz Zerfas Grinding plate for sharpening cutters

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2234109A (en) * 1940-08-22 1941-03-04 Culpepper James Luther Abrading device
US3345785A (en) * 1964-12-07 1967-10-10 Warren N Riker Sanding disc assembly
IT1044620B (en) * 1975-09-04 1980-04-21 Urso Giuseppe D GRINDER TOOL WITH REMOVABLE SHEET OR ABRASIVE PAPER WITH ACTIVE FACE AND EDGE RELATED SHEET OR ABRASIVE PAPER AND PROCEDURE FOR THE PRODUCTION AND ASSEMBLY OF SUCH TOOL

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19729125C1 (en) * 1997-07-08 1999-03-04 Heinz Zerfas Grinding plate for sharpening cutters

Also Published As

Publication number Publication date
ATE116889T1 (en) 1995-01-15
DE59104199D1 (en) 1995-02-23
EP0459138A1 (en) 1991-12-04
DE4013364A1 (en) 1991-10-31

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