EP0256249B1 - Device for sharpening drills - Google Patents

Device for sharpening drills Download PDF

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Publication number
EP0256249B1
EP0256249B1 EP87108772A EP87108772A EP0256249B1 EP 0256249 B1 EP0256249 B1 EP 0256249B1 EP 87108772 A EP87108772 A EP 87108772A EP 87108772 A EP87108772 A EP 87108772A EP 0256249 B1 EP0256249 B1 EP 0256249B1
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EP
European Patent Office
Prior art keywords
gripping
unit
rotatable
receiving part
securable
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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
EP87108772A
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German (de)
French (fr)
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EP0256249A3 (en
EP0256249A2 (en
Inventor
Reinhold Reiling
Karl Reiling
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Individual
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Individual
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Priority to AT87108772T priority Critical patent/ATE59321T1/en
Publication of EP0256249A2 publication Critical patent/EP0256249A2/en
Publication of EP0256249A3 publication Critical patent/EP0256249A3/en
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Publication of EP0256249B1 publication Critical patent/EP0256249B1/en
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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
    • B24B3/28—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills by swivelling the drill around an axis angularly to the drill axis

Definitions

  • the invention relates to a device for grinding the cutting of drill bits consisting of a displaceable and / or rotatable base plate and a base part fastened thereon with a clamping device for the drill bit to be ground in the form of two clamping jaws connected as a unit, which on a receiving part on the base part are arranged reversible, and a grinding unit carrying a grinding wheel.
  • Such a device which corresponds to the preamble of claim 1, is known, for example, from DE-PS 29 15 601 and DE-PS 31 46 664.
  • a clamping device for the drill in the form of two clamping jaws, here prisms, which as Unit connected to use the twist drill.
  • This prism unit is then arranged on a horizontal pivot of a standing part in front of the grinding unit so that it can be moved and pivoted.
  • the reclamping device is to be held by hand on its swivel bearing during regrinding on the front or circumferential side of the grinding wheel.
  • lateral angular groove guides are arranged on the receiving part, and in that the clamping jaws on the four outer edges on the plug-in end angular groove guides cooperate when repositioning, with a pressure screw on the receiving part of the releasable jamming of the Clamping jaw unit serves.
  • the receiving part on the stand part can also be rotatable and lockable about an axis running perpendicular to this, the drill axis and the horizontal axis crossing each other in space.
  • this makes it easy to detach and change, and the combined horizontal and vertical swivel axis adjustment makes it easy to adjust the drill bit for the grinding process.
  • the receiving part on the back part which can be adjusted and locked, can itself be pivoted and locked around a parallel axis, the guide part for the reversible clamping jaw unit then being rotatable about the perpendicular axis, thereby additionally allowing the side part to be pivoted without rotating the base part is achieved.
  • the device is used to grind the cutting edges of drills in conjunction with a grinding unit 1 with a grinding wheel 2.
  • a clamping device for the drill 3 in the form of a reversible clamping jaw unit 4 in the manner of DE-PS 29 15 601 or DE-PS 31 46 664 provided for a receiving part 5.
  • the clamping jaw unit 4 consists of two prisms 6 and 7 with angular grooves 6a, 7a and encompassing U-guide piece 8, the one prism 6 being screwed tight at 8a and the second prism 7 being guided displaceably by means of a keyway 8b by a clamping screw 9.
  • the prisms 6 and 7 have angular rail incisions 10 on all four outer edges on the push-on end for implementation during drill grinding on the one hand and on the other hand.
  • the two jaws of the jaw unit 4 have an extendable and lockable end piece 6b or 7b on each prism for extending the holding for long drills 3, as can be seen in FIG. 2.
  • the clamping jaw unit 4 is received here by means of the four angular incisions 10 on the outer edges of the prisms 6, 7 on the receiving part 5 and specifically its lateral angular groove guide 11, 12 in the guide part 13 by being pushed in the direction D by means of a pressure screw 14 releasably clamped during insertion, as shown in FIG. 1.
  • the receiving part 5 can be pivoted and locked on the stand part 15 both about the horizontal axis A-A in the direction of rotation E and on the back part 16 about the parallel axis Ai-Ai in the direction of rotation F.
  • the adjustment of the back part 16 on the stand part 15 by means of bolt-hole connection 17, 18 is to be determined in stages, as shown in FIG. 3.
  • the additional pivoting of the guide part 13 takes place via an eccentric head 20 which can be rotated in an oval hole 19 and has a clamping screw 21 as a fine adjustment, as shown in FIG. 4.
  • the receiving part 15 with the back part 16 is adjustable about the horizontal axis AA in the direction of rotation E and with its guide part 13 on the back part 16 about a parallel axis A i -A i in the direction of rotation F
  • a further pivoting about an axis running perpendicular thereto is also possible BB is provided in the direction G of the guide part 13, the drill axis CC and the horizontal axis AA each crossing in space.
  • the guide part 13 pivotably arranged to the back part 16 consists of two parts, namely this (13) consists of the angular groove guide with rotating eye 13a and the receiving shoulder 13b and the clamping lever 22 provided for fixing the joint.
  • the stand part 15 can in turn be adjusted by means of a rotating plate 23 with a locking lever 24 for rotating H on a slide 25 at right angles to the grinding unit 1, that is to say in the direction J against the peripheral surface of the grinding wheel 2, the grinding unit 1 being displaceable transversely thereto in the direction K for further adjustment is.
  • Both the rotary plate 23 and the infeed for the slide 25 can be provided with setting scales 23a and 25a, as shown in FIG. 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Drilling Tools (AREA)

Abstract

This invention relates to a fixture for holding twist drills having cutting edges to be ground. A stand is mounted on a base plate, which is displaceable and/or rotatable. The stand carries a bracket, which carries gripping unit for gripping the drill to be ground. The gripping unit comprises two gripping jaws and is adapted to be detachably mounted on the bracket in two predetermined positions. The bracket is formed with angle-section track grooves for guiding the gripping unit. Each gripping jaw comprises two outer edges, which extend along said track grooves, and adjacent to said outer edges is formed with two angle-section guides, which are adapted to interengage with said track grooves and to be slidably guided by said track grooves. The bracket is provided with a thrust screw for clamping the angle-section guides in the track grooves. A grinding apparatus is also disclosed, which comprises a grinding unit carrying a grinding wheel and in which the base plate is movable relative to the grinding unit.

Description

Die Erfindung betrifft eine Vorrichtung zum Schleifen der Schneiden von Bohrern bestehend aus einer verschieb- und/oder drehbaren Grundplatte und einem auf dieser befestigten Standteil mit einer Einspannvorrichtung für den zu schleifenden Bohrer in Form von zwei als Einheit verbundenen Spannbacken, welche an einem Aufnahmeteil am Standteil umsteckbar angeordnet sind, sowie einem eine Schleifscheibe tragenden Schleifaggregat.The invention relates to a device for grinding the cutting of drill bits consisting of a displaceable and / or rotatable base plate and a base part fastened thereon with a clamping device for the drill bit to be ground in the form of two clamping jaws connected as a unit, which on a receiving part on the base part are arranged reversible, and a grinding unit carrying a grinding wheel.

Eine solche, dem Oberbegriff des Anspruchs 1 entsprechende Vorrichtung ist beispielsweise bekannt nach der DE-PS 29 15 601 sowie DE-PS 31 46 664. Hierbei findet in beiden Fällen eine Einspannvorrichtung für den Bohrer in Form von zwei Spannbacken, hier Prismen, welche als Einheit verbunden sind, zum Einspannen des Spiralbohrers Verwendung. Diese Prismeneinheit ist sodann an einem waagrechten Drehzapfen eines Standteils vor dem Schleifaggregat umsetz- und schwenkbar angeordnet. Hierbei ist die Einspannvorrichtung beim Nachschleifen an der Stirn- bzw. Umfangseite der Schleifscheibe auf seiner Schwenklagerung von Hand gegenzuhalten.Such a device, which corresponds to the preamble of claim 1, is known, for example, from DE-PS 29 15 601 and DE-PS 31 46 664. In both cases there is a clamping device for the drill in the form of two clamping jaws, here prisms, which as Unit connected to use the twist drill. This prism unit is then arranged on a horizontal pivot of a standing part in front of the grinding unit so that it can be moved and pivoted. The reclamping device is to be held by hand on its swivel bearing during regrinding on the front or circumferential side of the grinding wheel.

Desweiteren ist aus der nachveröffentlichten DE-PS 35 17 034 eine solche Haltevorrichtung bekannt geworden mit einem L-förmigen Aufnahmeteil für die Spannbackeneinheit, wobei der Bolzen zum festen Aufstecken derselben am Basisteil des Aufnahmeteils sitzt und von diesem nach oben steht, während das Rückenteil des Aufnahmeteils am Standteil um eine Waagrecht im Standteil vorgesehene und zum Bolzen rechtwinklig verlaufende Lagerachse schwenkbar ist. Hierdurch wird ein präziser Sitz der Spannbackeneinheit erreicht, welche nicht mehr von Hand gegenzuhalten ist, so daß auch Bohrer mit größerem Durchmesser im Werkstattbetrieb zu schleifen sind. Bei dieser Vorrichtung wird aber durch Ausbildung der der Spannbackeneinheit zugekehrten Seite als schräg verlaufende Flächen, gegen welche die auf den Bolzen aufgesteckte Spannbackeneinheit spielfrei anliegt, eine Verklemmung erreicht,welche schwer nur von Hand zu lösen ist. Außerdem ist auch die Handhabung bei der Bohrereinstellung nicht ganz einfach.Furthermore, such a holding device has become known from the subsequently published DE-PS 35 17 034 with an L-shaped receiving part for the clamping jaw unit, the bolt for firmly fitting the same sitting on the base part of the receiving part and standing upwards from this, while the back part of the receiving part on the stand part can be pivoted about a horizontal bearing axis provided in the stand part and extending at right angles to the bolt. This ensures a precise fit of the jaw unit, which can no longer be held by hand, so that even drills with larger diameters can be ground in the workshop. In this device, however, by designing the side facing the clamping jaw unit as inclined surfaces against which the clamping jaw unit placed on the bolt rests without play, a jamming is achieved which is difficult to release only by hand. In addition, handling when setting the drill is also not very easy.

Es ist nun Aufgabe der Erfindung, eine industriell verwertbare Vorrichtung zum Schleifen der Schneiden von Bohrern auch mit großen Durchmessern zu schaffen, welche sich beim Umstecken der Einspannvorrichtung auch ohne Werkzeug leicht lösen läßt und überdies eine leichte Einstellung ohne Ausspannen des Bohrers allein durch verschiedene Verstellmöglichkeiten erlaubt, das heißt die Handhabung erleichtert und verfeinert.It is an object of the invention to provide an industrially usable device for grinding the cutting of drills even with large diameters, which can be easily solved even without tools when repositioning the clamping device and moreover allows easy adjustment without unclamping the drill simply by various adjustment options , that means the handling is easier and refined.

Diese Aufgabe wird bei einer Vorrichtung nach dem Oberbegriff des Anspruchs 1 gemäß der Erfindung dadurch erreicht, daß am Aufnahmeteil seitliche Winkelnutführungen angeordnet sind, und daß die Spannbacken an den vier Außenkanten am Aufsteckende Winkelnutführungen beim Umstecken zusammenwirken, wobei eine Druckschraube am Aufnahmeteil der lösbaren Verklemmung der Spannbackeneinheit dient.This object is achieved in a device according to the preamble of claim 1 according to the invention in that lateral angular groove guides are arranged on the receiving part, and in that the clamping jaws on the four outer edges on the plug-in end angular groove guides cooperate when repositioning, with a pressure screw on the receiving part of the releasable jamming of the Clamping jaw unit serves.

Desweiteren kann der Aufnahmeteil am Standteil neben der Verstellung um eine waagrechte Achse zusätzlich um eine senkrecht zu dieser verlaufenden Achse dreh- und feststellbar sein, wobei sich die Bohrerachse und die waagrechte Achse jeweils im Raum kreuzen. Hierdurch wird bei präziser Halterung in der Winkeinutführung mit Schraubklemmung eine leichte Lös- und Umsteckbarkeit erreicht und durch die kombinierte waagrechte und senkrechte Schwenkachsverstellbarkeit eine leichte Bohrereinstellung für den Schleifvorgang ermöglicht.Furthermore, in addition to the adjustment about a horizontal axis, the receiving part on the stand part can also be rotatable and lockable about an axis running perpendicular to this, the drill axis and the horizontal axis crossing each other in space. With precise mounting in the angular slot guide with screw clamp, this makes it easy to detach and change, and the combined horizontal and vertical swivel axis adjustment makes it easy to adjust the drill bit for the grinding process.

Auch kann hierbei der Aufnahmeteil am um eine Achse verstell und feststellbaren Rückenteil selbst wiederrum um eine parallele Achse hierzu verschwenk- und feststellbar sein, wobei der Führungsteil für die umsteckbare Spannbackeneinheit sodann um die senkrecht verlaufende Achse drehbar ist, wodurch zusätzlich eine Seitenverschwenkbarkeit ohne Verdrehung des Standteils erreicht wird.Also, the receiving part on the back part, which can be adjusted and locked, can itself be pivoted and locked around a parallel axis, the guide part for the reversible clamping jaw unit then being rotatable about the perpendicular axis, thereby additionally allowing the side part to be pivoted without rotating the base part is achieved.

Weitere Einzelheiten ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels an Hand der Zeichnung; in dieser zeigen:

  • Fig. 1 eine perspektivische Gesamtansicht einer Vorrichtung zum Schleifen der Schneiden von Bohrern mit angedeuteter Spannbackeneinheit und eingespanntem Bohrer beim Nachschleifen,
  • Fig. 2 eine perspektivische Ansicht der Spannbackeneinheit mit eingespanntem Bohrer, durch die Perspektive verkürzt dargestellt,
  • Fig. 3 eine perspektivische Teilansicht des Aufnahmeteils mit Führungs- und Rückenteil, und
  • Fig. 4 eine perspektivische Ansicht der Exzenterverstellung zwischen Rückenteil und Führungsteil.
Further details emerge from the subclaims and the following description of a preferred exemplary embodiment with reference to the drawing; in this show:
  • 1 is an overall perspective view of a device for grinding the cutting edges of drills with indicated jaw unit and clamped drill during regrinding,
  • 2 shows a perspective view of the clamping jaw unit with the drill clamped in, shown shortened by the perspective,
  • Fig. 3 is a partial perspective view of the receiving part with the guide and back part, and
  • Fig. 4 is a perspective view of the eccentric adjustment between the back part and the guide part.

Wie aus der Zeichnung ersichtlich wird, dient die Vorrichtung zum Schleifen der Schneiden von Bohrern und zwar in Verbindung mit einem Schleifaggregat 1 mit Schleifscheibe 2. Hierfür ist eine Einspannvorrichtung für den Bohrer 3 in Form einer umsteckbaren Spannbackeneinheit 4 nach Art der DE-PS 29 15 601 bzw. DE-PS 31 46 664 für ein Aufnahmeteil 5 vorgesehen. Die Spannbackeneinheit 4 besteht aus zwei Prismen 6 und 7 mit Winkelnuten 6a, 7a und umgreifendem U-Führungsstück 8, wobei das eine Prisma 6 bei 8a festgeschraubt und das zweite Prisma 7 mittels Keilnut 8b geführt durch eine Spannschraube 9 verschiebbar gehalten ist. Die Prismen 6 und 7 weisen an allen vier Aussenkanten am Aufsteckende Winkelschieneneinschnitte 10 zum Umsetzen beim Bohrerschleifen einerseits und andererseits auf. Überdies besitzen die beiden Spannbacken der Spannbackeneinheit 4 an jedem Prisma ein auszieh-und feststellbares Endstück 6b bzw. 7b zur Halteverlängerung für lange Bohrer 3, wie dies aus Fig. 2 ersichtlich wird.As can be seen from the drawing, the device is used to grind the cutting edges of drills in conjunction with a grinding unit 1 with a grinding wheel 2. For this purpose, a clamping device for the drill 3 in the form of a reversible clamping jaw unit 4 in the manner of DE-PS 29 15 601 or DE-PS 31 46 664 provided for a receiving part 5. The clamping jaw unit 4 consists of two prisms 6 and 7 with angular grooves 6a, 7a and encompassing U-guide piece 8, the one prism 6 being screwed tight at 8a and the second prism 7 being guided displaceably by means of a keyway 8b by a clamping screw 9. The prisms 6 and 7 have angular rail incisions 10 on all four outer edges on the push-on end for implementation during drill grinding on the one hand and on the other hand. In addition, the two jaws of the jaw unit 4 have an extendable and lockable end piece 6b or 7b on each prism for extending the holding for long drills 3, as can be seen in FIG. 2.

Die Spannbackeneinheit 4 wird hier mittels den vier Winkeleinschnitten 10 an den Außenkanten der Prismen 6,7 am Aufnahmeteil 5 und zwar dessen seitlicher Winkelnutführung 11, 12 im Führungsteil 13 durch Aufschieben in Richtung D umsteckbar aufgenommen um mittels Druckschraube 14 nach dem Einführen lösbar festgeklemmt, wie dies Fig. 1 zeigt.The clamping jaw unit 4 is received here by means of the four angular incisions 10 on the outer edges of the prisms 6, 7 on the receiving part 5 and specifically its lateral angular groove guide 11, 12 in the guide part 13 by being pushed in the direction D by means of a pressure screw 14 releasably clamped during insertion, as shown in FIG. 1.

Der Aufnahmeteil 5 ist am Standteil 15 sowohl um die waagrechte Achse A-A in Drehrichtung E als auch am Rückenteil 16 um die parallele Achse Ai-Ai in Drehrichtung F hierzu verschwenk- und feststellbar. Hierbei ist die verstellung des Rückenteils 16 am Standteil 15 mittels Bolzen- Lochverbindung 17, 18 stufenweise festzulegen, wie dies Fig. 3 zeigt. Die zusätzliche Verschwenkung des Führungsteils 13 erfolgt über einen in einem Ovalloch 19 drehbeweglichen Exzenterkopf 20 mit Festspannschraube 21 als Feinverstellung, wie dies Fig. 4 zeigt.The receiving part 5 can be pivoted and locked on the stand part 15 both about the horizontal axis A-A in the direction of rotation E and on the back part 16 about the parallel axis Ai-Ai in the direction of rotation F. Here, the adjustment of the back part 16 on the stand part 15 by means of bolt-hole connection 17, 18 is to be determined in stages, as shown in FIG. 3. The additional pivoting of the guide part 13 takes place via an eccentric head 20 which can be rotated in an oval hole 19 and has a clamping screw 21 as a fine adjustment, as shown in FIG. 4.

Während das Aufnahmeteil 15 mit Rückenteil 16 um die waagrechte Achse A-A in Drehrichtung E und mit seinem Führungsteil 13 am Rückenteil 16 um eine parallele Achse Ai-Ai in Drehrichtung F hierzu verstellbar ist, ist zusätzlich eine weitere Verschwenkung um eine senkrecht dazu verlaufende Achse B-B in Richtung G des Führungsteils 13 vorgesehen, wobei sich die Bohrerachse C-C und die waagrechte Achse A-A jeweils im Raum kreuzen. Hierfür ist der zum Rückenteil 16 verschwenkbar angeordnete Führungsteil 13 zweiteilig und zwar besteht dieser (13) aus der Winkelnutführung mit Drehauge 13a und der Aufnahmeschulter 13b sowie dem zum Feststellen des Gelenks vorgesehenen Spannhebels 22.While the receiving part 15 with the back part 16 is adjustable about the horizontal axis AA in the direction of rotation E and with its guide part 13 on the back part 16 about a parallel axis A i -A i in the direction of rotation F, a further pivoting about an axis running perpendicular thereto is also possible BB is provided in the direction G of the guide part 13, the drill axis CC and the horizontal axis AA each crossing in space. For this purpose, the guide part 13 pivotably arranged to the back part 16 consists of two parts, namely this (13) consists of the angular groove guide with rotating eye 13a and the receiving shoulder 13b and the clamping lever 22 provided for fixing the joint.

Das Standteil 15 ist seinerseits mittels einer Drehplatte 23 mit Feststellhebel 24 zum Drehen H auf einem Schlitten 25 rechtwinklig zum Schleifaggregat 1, das heißt in Richtung J gegen die Umfangsfläche der Schleifscheibe 2 zustellbar, wobei das Schleifaggregat 1 quer hierzu in Richtung K zur weiteren Einstellung verschiebbar ist. Sowohl die Drehplatte 23 als auch die Zustellung für den Schlitten 25 können hierbei mit Einstellskalen 23a bzw. 25a versehen sein, wie dies Fig. 1 zeigt.The stand part 15 can in turn be adjusted by means of a rotating plate 23 with a locking lever 24 for rotating H on a slide 25 at right angles to the grinding unit 1, that is to say in the direction J against the peripheral surface of the grinding wheel 2, the grinding unit 1 being displaceable transversely thereto in the direction K for further adjustment is. Both the rotary plate 23 and the infeed for the slide 25 can be provided with setting scales 23a and 25a, as shown in FIG. 1.

Claims (8)

1. Device for sharpening drill bits comprising a movable and/or rotatable base plate (23, 25), a stand (15) fixed to the latter and a receiving part (5) pivotally mounted on the latter for receiving a gripping device for the drill to be sharpened in the form of two gripping jaws (6, 7) connected as a unit (4) which can be connected with the receiving part (5) in such a way as to be able to be moved by 180°, and a grinding unit (1) bearing a grinding disc (2), characterised in that lateral angle groove guides (11, 12) are arranged on the receiving part (5) and in that the gripping jaws (6, 7) have angle iron notches (10) on the four outer edges on the attachment end which co-operate with the angle groove guides (11, 12) when the gripping unit is moved, whereby a pressure screw (14) on the receiving part (5) serves to releasably clamp the gripping jaw unit (4).
2. Device according to Claim 1, characterised in that the receiving part (5) on the stand (15), besides being adjustable about a horizontal axis (A-A), is also rotatable and securable about an axis (B-B) running perpendicular to the latter, whereby the drill axis (C-C) and the horizontal axis (A-A) spacially intersect one another in each case.
3. Device according to Claim 1 or 2, characterised in that the receiving part (5) is rotatable and securable (21) on the back part (16) which is rotatable and securable about a horizontal axis (A-A) or on the other hand about an axis parallel to the latter, whereby the guide part (13) for the movable gripping jaw unit (4) is then rotatable about the vertical axis (B-B).
4. Device according to Claim 2 or 3, characterised in that the adjustable back part (16) can be fixed to the stand (15) in stages by means of a bolt-hole connection (17, 18).
5. Device according to one of Claims 2 to 4, characterised in that the guide part additionally swivel mounted with regard to the back part (16) of the receiving part (5) can be finely adjusted by means of an eccentric head (20) rotatable and securable in an oval aperture (19).
6. Device according to one of the preceding claims, characterised in that the guide part (13) arranged swivel mounted with regard to the back part (16) is in two parts, comprising the angle groove guide (11, 12) with rotary eye (13a) and a receiving shoulder (13b) and tension lever (22).
7. Device according to one of the preceding claims, characterised in that the gripping jaw unit (4) has a removable and securable end-piece (6b, 7b) on each gripping jaw (6, 7) for a holding extension for long drills (3).
8. Device according to one of the preceding claims, characterised in that in the case of prisms (6, 7) held movable with regard to one another by means of an engaging U guide piece (8) as gripping jaws in the case of prism (6) fastened externally with screws (8a) the inner prism (7) can be moved by means of key-way connection (8b) by means of tension screw (9).
EP87108772A 1986-08-09 1987-06-19 Device for sharpening drills Expired - Lifetime EP0256249B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108772T ATE59321T1 (en) 1986-08-09 1987-06-19 DEVICE FOR GRINDING THE BLADES OF DRILLS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863627012 DE3627012A1 (en) 1986-08-09 1986-08-09 DEVICE FOR GRINDING DRILL CUTTING
DE3627012 1986-08-09

Publications (3)

Publication Number Publication Date
EP0256249A2 EP0256249A2 (en) 1988-02-24
EP0256249A3 EP0256249A3 (en) 1989-01-04
EP0256249B1 true EP0256249B1 (en) 1990-12-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108772A Expired - Lifetime EP0256249B1 (en) 1986-08-09 1987-06-19 Device for sharpening drills

Country Status (8)

Country Link
US (1) US4769955A (en)
EP (1) EP0256249B1 (en)
JP (1) JP2640943B2 (en)
AT (1) ATE59321T1 (en)
AU (1) AU585166B2 (en)
DE (2) DE3627012A1 (en)
ES (1) ES2019903B3 (en)
GR (1) GR3001253T3 (en)

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WO2000044530A1 (en) * 1999-01-29 2000-08-03 Intertool Machines Ltd. Universal sharpening apparatus employing pair of arcuate bearings
TW538849U (en) * 2002-05-21 2003-06-21 Jen-Fu Lin Grinding device for drill bit
KR20040047501A (en) * 2002-11-29 2004-06-05 이상덕 Bench type drill's angle grinder for general
JP2006312220A (en) * 2005-05-09 2006-11-16 Kanae Giken:Kk Grinding device
JP5403342B2 (en) * 2009-06-01 2014-01-29 孝登 緒方 Tool grinding indexing device
CN102259281A (en) * 2011-08-15 2011-11-30 四川欧曼机械有限公司 Drill bit locating device of drill bit grinding machine
CN103949942B (en) * 2014-05-15 2016-08-17 常州机电职业技术学院 Numerical control stamping scissors tool grinding clamp
CN104108076B (en) * 2014-07-18 2016-10-19 卡帕亚洲科技（嘉善）有限公司 A kind of positioning tool produced for emery wheel
CN107756149A (en) * 2017-10-30 2018-03-06 赵建秋 A kind of drill bit arrangement for grinding
CN112589547B (en) * 2020-11-03 2021-12-14 河源富马硬质合金股份有限公司 Device for producing high-strength, high-toughness and high-wear-resistance hard alloy glass cutter drilling tool
CN113199345A (en) * 2021-05-16 2021-08-03 马鞍山市数知物联科技有限公司 Part grinding device capable of being rapidly clamped and used for machining

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US2887833A (en) * 1958-04-03 1959-05-26 Passarotti Anthony Tool grinding jig
BE794210Q (en) * 1968-02-14 1973-05-16 Radial Lip Machine Inc FOREST SHARPENING APPARATUS
JPS5226691A (en) * 1975-08-25 1977-02-28 Toa Kikai Seisakusho:Kk Drill chucking device of drill grinder
US4270315A (en) * 1978-07-29 1981-06-02 Reinhold Reiling Fixture for holding a twist drill to be reground
DE3039649C2 (en) * 1979-04-18 1983-12-08 Karl 7539 Kämpfelbach Reiling Device for grinding the cutting edges of twist drills
CH632439A5 (en) * 1979-12-13 1982-10-15 Mecastra Societe De Mecanique Machine for sharpening drill bits
IL64173A (en) * 1981-10-30 1984-03-30 Etm Eng Tool Mfg Co Ltd Machine for grinding points of drills
DE3146664C1 (en) * 1981-11-25 1983-07-07 Karl 7539 Kämpfelbach Reiling Holding device for drills for grinding the cutting edges
DE3517034C1 (en) * 1985-05-11 1987-01-15 Reinhold Reiling Device for grinding the cutting edges of drills
US4646474A (en) * 1985-12-09 1987-03-03 Chen Jing Rong Drill grinder

Also Published As

Publication number Publication date
DE3627012A1 (en) 1988-02-18
EP0256249A3 (en) 1989-01-04
EP0256249A2 (en) 1988-02-24
DE3767073D1 (en) 1991-02-07
ATE59321T1 (en) 1991-01-15
GR3001253T3 (en) 1992-08-25
JP2640943B2 (en) 1997-08-13
AU585166B2 (en) 1989-06-08
ES2019903B3 (en) 1991-07-16
US4769955A (en) 1988-09-13
AU7606387A (en) 1988-02-11
JPS6347048A (en) 1988-02-27

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