EP0544936B1 - Drill sharpening device powered by portable drilling machine - Google Patents

Drill sharpening device powered by portable drilling machine Download PDF

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Publication number
EP0544936B1
EP0544936B1 EP19910120782 EP91120782A EP0544936B1 EP 0544936 B1 EP0544936 B1 EP 0544936B1 EP 19910120782 EP19910120782 EP 19910120782 EP 91120782 A EP91120782 A EP 91120782A EP 0544936 B1 EP0544936 B1 EP 0544936B1
Authority
EP
European Patent Office
Prior art keywords
drill
sharpening device
clamped
drill chuck
drilling machine
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
EP19910120782
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German (de)
French (fr)
Other versions
EP0544936A1 (en
Inventor
Folke Werner
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
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE59106691T priority Critical patent/DE59106691D1/en
Publication of EP0544936A1 publication Critical patent/EP0544936A1/en
Application granted granted Critical
Publication of EP0544936B1 publication Critical patent/EP0544936B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • B24B3/26—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills
    • B24B3/265—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills using devices specially adapted for domestic use
    • 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

Definitions

  • the invention relates to devices according to the preamble of claim 1.
  • This object is achieved in that a separate intermediate member, which is clamped on the one hand in the drill chuck and on the other hand engages in the receptacle, is provided for the drive connection.
  • the separate intermediate link is clamped into the drill chuck of the drill and the device, as far as possible, is plugged onto the spindle neck of the drill and clamped.
  • the intermediate link can be, for example, a hexagonal rod which engages in an engagement recess of the same cross-section in the axis. If the intermediate link is too short and does not reach the axis - short drill chucks - it is clamped less deep into the drill chuck. If it is too long - long chuck, the device does not reach the spindle neck - it can be shortened.
  • the intermediate member is a screw, the shaft of which is clamped in the drill chuck and the head which engages in the receptacle has a non-circular cross section. Such an intermediate link can easily be replaced if lost.
  • the various parts of the exemplary embodiment are arranged concentrically around the central axis 1.
  • An axis consists of a spindle 2, which widens downwards over a shoulder 3 into a grinding wheel carrier 4.
  • the axis has a coaxial recess 6 on the drive side with a wall 5 which widens conically on the drive side.
  • An annular grinding wheel 7 is glued to the grinding wheel carrier 4 with an internally conical grinding surface 8.
  • a drill guide piece 9, 10 is arranged opposite the grinding surface 8. It is composed of a guide channel body 9 and a guide pin plate 10 rigidly connected to it.
  • the spindle 2 of the axes 2 to 4 is supported and the axis is supported by its shoulder 3 against the lower end of the bearing.
  • a screw 12 is screwed axially, the head of which is supported via the insert 13 against the upper end of the bearing.
  • the guide knuckle body 9 has with the axis 2 to 4 parallel guide channels 14, the lower openings of which are directed against the grinding surface 8.
  • the guide channels have different diameters and serve to axially guide drills of different diameters to the grinding surface.
  • the guide pin plate 10 has openings aligned with the guide channels 14, into each of which two guide pins 15, which are intended for engagement in the flutes of a drill, for radially guiding the drill to the grinding surface, project.
  • the drill guide piece 9, 10 is rigidly connected to a housing 16 to 19.
  • the housing 16 surrounds the grinding wheel 7 and narrows down into a clamping sleeve 17, which a Has clamping eye 18 with a clamping screw 19.
  • a separate hissing member 23, 24 consists of a shaft 23 which carries a hexagonal head 24 with a larger cross section.
  • the drive connection between the axes 2 to 4 and the drill chuck 22 of a hand drill 21 is established as follows.
  • the shaft 23 of the intermediate member is clamped in the drill chuck.
  • the device is pushed over the drill chuck and the spindle neck 20 of the drilling machine until the head 24 of the intermediate member penetrates into the recess 6 in the axis.
  • the device is pressed against the head 24 of the intermediate member, which wedges in the conical wall 5, and the clamping screw 19 is tightened.
  • the device is ready for use. If the intermediate link does not reach the axis, it is clamped less deep in the drill chuck. If the device does not reach the spindle neck 20, the shaft 23 of the intermediate member is shortened accordingly.
  • the intermediate link 23, 24 is dimensioned such that it can be replaced by a corresponding standard screw if lost.
  • the drill to be ground is inserted into the smallest suitable guide channel 14 and ground in a known manner.

Description

Die Erfindung bezieht sich auf Einrichtungen gemäß dem Oberbegriff des Anspruchs 1.The invention relates to devices according to the preamble of claim 1.

Einrichtungen dieser Art sind durch die CH-PS-514399 oder DE-OS-2363165 bekannt. Die Verbindung zwischen dem Bohrfutter und der Aufnahme der Achse wird hier dadurch erreicht, daß die Spannbacken des Bohrfutters in eine kegelig vertiefte Aufnahme eingreifen. Es besteht jedoch der Nachteil, daß die Einrichtung nur dann auf allen vom Spindelhalsdurchmesser in Frage kommenden Bohrmaschinen verwendet werden kann, wenn eine zusätzliche und axial verschiebliche Doppelklemmschelle am Gehäuse angeordnet ist, welche die Herstellung der Einrichtung verteuert. Der Grund dafür ist, daß der Längenunterschied (ca 45 mm) zwischen den längsten und den kürzesten Bohrfuttern handelsüblicher Bohrmaschinen mit Eurohalsdurchmesser 43 mm groß und die Länge des Spindelhalses (Mindestlänge nur ca 15 mm) begrenzt ist.Devices of this type are known from CH-PS-514399 or DE-OS-2363165. The connection between the drill chuck and the receptacle of the axis is achieved here in that the jaws of the drill chuck engage in a conically recessed receptacle. However, there is the disadvantage that the device can only be used on all drilling machines that come into question from the spindle neck diameter if an additional and axially displaceable double clamp is arranged on the housing, which increases the cost of manufacturing the device. The reason for this is that the length difference (approx. 45 mm) between the longest and the shortest drill chucks of commercially available drills with a Euro neck diameter of 43 mm is large and the length of the spindle neck (minimum length only approx. 15 mm) is limited.

Es ist daher Aufgabe der Erfindung, eine gattungsgemäße, herstellungstechnisch einfache Einrichtung zu schaffen, die trotz unterschielicher Bohrfutterlängen ohne axial verschiebliche Klemmschelle auf allen Bohrmaschinen eines bestimmten Spindelhalsdurchmessers verwendet werden kann.It is therefore an object of the invention to provide a generic, technically simple device that can be used on all drills of a certain spindle neck diameter despite axially displaceable drill chuck lengths without an axially displaceable clamp.

Gelöst wird diese Aufgabe dadurch, daß zur Antriebsverbindung ein gesondertes, einerseits im Bohrfutter eingespanntes, anderseits in die Aufnahme eingreifendes Zwischenglied vorgesehen ist.This object is achieved in that a separate intermediate member, which is clamped on the one hand in the drill chuck and on the other hand engages in the receptacle, is provided for the drive connection.

Das gesonderte Zwischenglied wird in das Bohrfutter der Bohrmaschine eingespannt und die Einrichtung, so weit es geht, auf den Spindelhals der Bohrmaschine gesteckt und festgeklemmt. Das Zwischenglied kann beispielsweise ein Sechskantstab sein, der in eine Eingriffsvertiefung gleichen Querschnitts in der Achse eingreift. Sollte das Zwischenglied zu kurz sein und die Achse nicht erreichen - kurze Bohrfutter - wird es weniger tief in das Bohrfutter eingespannt. Sollte es zu lang sein - lange Bohrfutter, die Einrichtung erreicht den Spindelhals nicht - kann es gekürzt werden.The separate intermediate link is clamped into the drill chuck of the drill and the device, as far as possible, is plugged onto the spindle neck of the drill and clamped. The intermediate link can be, for example, a hexagonal rod which engages in an engagement recess of the same cross-section in the axis. If the intermediate link is too short and does not reach the axis - short drill chucks - it is clamped less deep into the drill chuck. If it is too long - long chuck, the device does not reach the spindle neck - it can be shortened.

Gemäß einem weiteren Erfindungsmerkmal ist das Zwischenglied eine Schraube, deren Schaft im Bohrfutter eingespannt ist und deren in die Aufnahme eingreifender Kopf einen unrunden Querschnitt aufweist. Ein solches Zwischenglied kann bei Verlust leicht wiederbeschafft werden.According to a further feature of the invention, the intermediate member is a screw, the shaft of which is clamped in the drill chuck and the head which engages in the receptacle has a non-circular cross section. Such an intermediate link can easily be replaced if lost.

Nachstehend wird die Erfindung anhand eines in Fig. 1 im Längsschnitt dargestellten Ausführungsbeispiels näher erläutert.The invention is explained in more detail below on the basis of an exemplary embodiment shown in longitudinal section in FIG. 1.

Die verschiedenen Teile des Ausführungsbeispiels sind konzentrisch um die Mittelachse 1 angeordnet.The various parts of the exemplary embodiment are arranged concentrically around the central axis 1.

Eine Achse besteht aus einer Spindel 2, die sich nach unten über eine Schulter 3 in einen Schleifscheibenträger 4 verbreitert. Die Achse besitzt antriebsseitig eine gleichachsige Vertiefung 6 mit einer Wandung 5, die sich antriebsseitig konisch erweitert.An axis consists of a spindle 2, which widens downwards over a shoulder 3 into a grinding wheel carrier 4. The axis has a coaxial recess 6 on the drive side with a wall 5 which widens conically on the drive side.

Mit dem Schleifscheibenträger 4 ist eine ringförmige Schleifscheibe 7 mit einer innenkonischen Schleiffläche 8 verleimt.An annular grinding wheel 7 is glued to the grinding wheel carrier 4 with an internally conical grinding surface 8.

Gegenüber der Schleiffläche 8 ist ein Bohrerführungsstück 9,10 angeordnet. Es setzt sich aus einem Führungskanalkörper 9 und einer mit diesem starr verbundenen Führungszapfenplatte 10 zusammen.A drill guide piece 9, 10 is arranged opposite the grinding surface 8. It is composed of a guide channel body 9 and a guide pin plate 10 rigidly connected to it.

In dem mit dem Führungskanalkörper 9 starr verbundenen Kugellager 11 ist die Spindel 2 der Achse 2 bis 4 gelagert und die Achse stützt sich mittels ihrer Schulter 3 gegen das untere Lagerende ab. In der Spindel 2 ist eine Schraube 12 axial verschraubt, deren Kopf sich über die Beilage 13 gegen das obere Ende des Lagers abstützt.In the ball bearing 11 rigidly connected to the guide channel body 9, the spindle 2 of the axes 2 to 4 is supported and the axis is supported by its shoulder 3 against the lower end of the bearing. In the spindle 2, a screw 12 is screwed axially, the head of which is supported via the insert 13 against the upper end of the bearing.

Der Führungsknalkörper 9 weist mit der Achse 2 bis 4 parallele Führungskanäle 14 auf, deren untere Öffnungen gegen die Schleiffläche 8 gerichtet sind. Die Führungskanäle haben verschiedene Durchmesser und dienen der axialen Führung von Bohrern verschiedener Durchmesser zur Schleiffläche.The guide knuckle body 9 has with the axis 2 to 4 parallel guide channels 14, the lower openings of which are directed against the grinding surface 8. The guide channels have different diameters and serve to axially guide drills of different diameters to the grinding surface.

Die Führungszapfenplatte 10 besitzt mit den Führungskanälen 14 fluchtende Öffnungen, in die je zwei zum Eingriff in die Spannuten eines Bohrers bestimmte Führungszapfen 15, zur radialen Führung der Bohrer zur Schleiffläche, ragen.The guide pin plate 10 has openings aligned with the guide channels 14, into each of which two guide pins 15, which are intended for engagement in the flutes of a drill, for radially guiding the drill to the grinding surface, project.

Das Bohrerführungsstück 9,10 ist mit einem Gehäuse 16 bis 19 starr verbunden. Das Gehäuse 16 umgibt die Schleifscheibe 7 und verengt sich nach unten in eine Klemmhülse 17, welche ein Klemmauge 18 mit einer Klemmschraube 19 besitzt.The drill guide piece 9, 10 is rigidly connected to a housing 16 to 19. The housing 16 surrounds the grinding wheel 7 and narrows down into a clamping sleeve 17, which a Has clamping eye 18 with a clamping screw 19.

Ein gesondertes Zischenglied 23,24 besteht aus einem Schaft 23, der einen sechskantigen, querschnittgrößeren Kopf 24 trägt.A separate hissing member 23, 24 consists of a shaft 23 which carries a hexagonal head 24 with a larger cross section.

Die Antriebsverbindung zwischen der Achse 2 bis 4 und dem Bohrfutter 22 einer Handbohrmaschine 21 wird folgendermaßen hergestellt. Der Schaft 23 des Zwischengliedes wird in das Bohrfutter eingespannt. Die Einrichtung wird über das Bohrfutter und den Spindelhals 20 der Bohrmaschine geschoben, bis der Kopf 24 des Zwischengliedes in die Vertiefung 6 in der Achse eindringt. Die Einrichtung wird gegen den Kopf 24 des Zwischengliedes gedrückt, wobei sich dieser in der konischen Wandung 5 verkeilt, und die Klemmschraube 19 festgezogen. Die Einrichtung ist einsatzbereit. Falls das Zwischenglied die Achse nicht erreicht, wird es weniger tief im Bohrfutter eingespannt. Falls die Einrichtung den Spindelhals 20 nicht erreicht, wird der Schaft 23 des Zwischengliedes entsprechend verkürzt.The drive connection between the axes 2 to 4 and the drill chuck 22 of a hand drill 21 is established as follows. The shaft 23 of the intermediate member is clamped in the drill chuck. The device is pushed over the drill chuck and the spindle neck 20 of the drilling machine until the head 24 of the intermediate member penetrates into the recess 6 in the axis. The device is pressed against the head 24 of the intermediate member, which wedges in the conical wall 5, and the clamping screw 19 is tightened. The device is ready for use. If the intermediate link does not reach the axis, it is clamped less deep in the drill chuck. If the device does not reach the spindle neck 20, the shaft 23 of the intermediate member is shortened accordingly.

Das Zwischenglied 23,24 ist so bemessen, daß es bei Verlust durch eine entsprechende Normschraube ersetzt werden kann.The intermediate link 23, 24 is dimensioned such that it can be replaced by a corresponding standard screw if lost.

Der zu schleifende Bohrer wird in den kleinsten passenden Führungskanal 14 eingeführt und in bekannter Weise geschliffen.The drill to be ground is inserted into the smallest suitable guide channel 14 and ground in a known manner.

Claims (2)

  1. Drill bit sharpening device consisting of a drill (21) provided with a drill chuck (22) and a spindle neck (20), of an attachment which is clamped on the spindle neck (20) of the drill (21) and which has a grinding wheel (7) connected to an axle (2, 3, 4) and provided with a grinding face (8) and also has a drill bit guide element (9, 10) arranged opposite the grinding face (8), and of a driving connection between the drill chuck (22) of the drill (21) and a seat (5, 6) of the axle (2, 3, 4), characterized in that for the driving connection the drill bit sharpening device has a separate intermediate element (23, 24) clamped at one end in the drill chuck (22) and engaging at the other end in the seat (5, 6).
  2. Drill bit sharpening device according to Claim 1, characterized in that the intermediate element is a screw whose shank (23) is clamped in the drill chuck (22) and whose head (24) engaging in the seat has a non-circular cross-section.
EP19910120782 1990-06-15 1991-12-03 Drill sharpening device powered by portable drilling machine Expired - Lifetime EP0544936B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE59106691T DE59106691D1 (en) 1991-12-03 1991-12-03 Drill grinding device with drill drive.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT129490A AT401149B (en) 1990-06-15 1990-06-15 DEVICE FOR GRINDING DRILLS

Publications (2)

Publication Number Publication Date
EP0544936A1 EP0544936A1 (en) 1993-06-09
EP0544936B1 true EP0544936B1 (en) 1995-10-11

Family

ID=3510779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910120782 Expired - Lifetime EP0544936B1 (en) 1990-06-15 1991-12-03 Drill sharpening device powered by portable drilling machine

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EP (1) EP0544936B1 (en)
AT (1) AT401149B (en)
DE (1) DE4118737A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU696295B3 (en) * 1998-03-17 1998-09-03 David Michael Walker Die grinder attachment
DE10361324B3 (en) * 2003-12-27 2005-05-19 Stefan Traublinger Compact attachment for a power hand drill for sharpening drill bits is clamped to the drill housing and has adjustable angled grinding discs and a spring loaded holder for the drill bits
WO2023150895A1 (en) * 2022-02-11 2023-08-17 Salas Vergara Josue Alejandro A rotary adapter that uses an angle grinder as a straight grinder, providing greater versatility and preventing the adapter from overheating due to use and friction

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1334224A (en) * 1918-10-31 1920-03-16 Campbell Colin Portable polisher and grinder
DE2042014A1 (en) * 1969-10-07 1971-04-22 Wurscher Raimund Dr Phil Device for grinding drills
DE2363165A1 (en) * 1973-12-19 1975-06-26 Bosch Gmbh Robert DRILL GRINDING DEVICE
DE2343228A1 (en) * 1973-08-28 1975-03-20 Bosch Gmbh Robert DRILL GRINDING DEVICE
DD124165A1 (en) * 1975-11-04 1977-02-09

Also Published As

Publication number Publication date
AT401149B (en) 1996-06-25
EP0544936A1 (en) 1993-06-09
ATA129490A (en) 1995-11-15
DE4118737A1 (en) 1992-01-30

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