EP0028413A1 - Accessoire pour le meulage - Google Patents

Accessoire pour le meulage Download PDF

Info

Publication number
EP0028413A1
EP0028413A1 EP80106723A EP80106723A EP0028413A1 EP 0028413 A1 EP0028413 A1 EP 0028413A1 EP 80106723 A EP80106723 A EP 80106723A EP 80106723 A EP80106723 A EP 80106723A EP 0028413 A1 EP0028413 A1 EP 0028413A1
Authority
EP
European Patent Office
Prior art keywords
drill
grinding aid
holder
cutting edge
grinding
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.)
Withdrawn
Application number
EP80106723A
Other languages
German (de)
English (en)
Inventor
Wolfgang Dipl.-Ing. Peetz
Bernhard Moser
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.)
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Robert Bosch Power Tools GmbH
Original Assignee
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Hawera Probst 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 Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG, Hawera Probst GmbH filed Critical Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Publication of EP0028413A1 publication Critical patent/EP0028413A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • B24B3/247—Supports for drills
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/066—Work supports, e.g. adjustable steadies adapted for supporting work in the form of tools, e.g. drills

Definitions

  • the invention relates to a grinding aid according to the preamble of claim 1.
  • the regrinding of twist drills is particularly often required in so-called multi-purpose drills, which are used to drill holes in different materials such as. B. concrete, brick, iron, ceramic, glass, etc. are suitable. They are therefore mainly used in drills for do-it-yourselfers, i.e. by people who only maintain a small workshop for predominantly private purposes. If concrete or similar hard materials are processed with such a drill, the cutting edge of the drill is mostly so dull, especially after the drill has been used, that iron or glass can no longer be drilled properly. Regrinding drills is difficult without special aids, i.e. freehand, because the end faces to be reground should have their original angular position to the drill axis even after sharpening. Adhering to the correct bevel angle, however, requires special knowledge and a certain level of manual skill.
  • the invention has for its object to provide a device as a grinding aid that allows easy handling while maintaining the necessary cutting angle positions when manually regrinding a twist drill on a rotating grinding wheel.
  • the drill inserted in the drill receptacle of the holder is aligned in a secure position and can be held precisely with respect to the grinding wheel, the correct inclined position of the drill axis being predefined for an angular grinding by means of the front oblique surface of the holder, which forms a cutting edge gauge. Due to the inclined undercut gauge surface directly adjacent to the cutting edge gauge, at the same time an angular bevel is specified, via which a clearance angle is achieved on the cutting surface in order to achieve an optimal drilling cut.
  • the grinding aid according to the invention thus provides an auxiliary device which enables even the untrained handyman to sharpen a blunt drill quickly and functionally without difficulty.
  • the device shown in the drawing serves as a grinding aid 1 and essentially consists of a flat rectangular holder 2 for a twist drill 8.
  • the holder 2 is a handle plate with a drill holder.
  • the drill holder 3 runs parallel to a long side 4 of the handle plate 2 and has an angular cross section. It has a drill support surface 5 running parallel to the surface plane of the handle plate 2 and a stop surface 6 which runs perpendicular to the surface plane of the handle plate 2 and to the drill support surface 5.
  • the total width of the handle plate 2 between the long side 4 and the long side 7 running parallel to this side is approximately three times greater than the width of the drill support surface 5, which provides a sufficiently large gripping surface for holding when regrinding the drill 8 located in the drill holder 3.
  • the thickness of the handle plate 2 in the direction perpendicular to the plane of the surface is about a quarter greater than the height of the stop surface 6 (FIG. 2), so that a flat material-saving Execution is given.
  • the holder or grip plate 2 has at the end a surface 9 lying obliquely to the stop surface 6, which forms a cutting edge gauge, since its angle to the contact surface corresponds to the apex angle which the end face of the drill 8 to be regrinded includes with its longitudinal axis.
  • a relief grinding gauge surface 10 of the holder 2 corresponds to the clearance angle surface of the drill 8.
  • the cutting edge gauge 9 and the relief grinding gauge surface 10 extend over the entire width of the handle plate 2 from its longitudinal side 4 to the longitudinal side 7.
  • the relief grinding gauge surface 10 is, as in particular FIG. 2 can be seen, starting from the cutting edge gauge 9 in the direction of the lower surface 11 of the handle plate 2 arranged at an angle of about 30 °.
  • the drill tip consists of a hard metal insert 12 which forms the end faces lying at an angle to one another and thus the cutting edges of the drill.
  • the handle plate 2 has an extension 13 of the drill receptacle 3 at its end region facing the cutting edge gauge 9.
  • the drill tip protrudes beyond the holder 2, and the cutting edge gauge 9 can be easily seen and aligned by hand parallel to the peripheral surface 14 of a rotating grinding wheel 15.
  • the drill 8 is rotated through its longitudinal axis by 180 °, so that the other end face of the drill tip can also be reground.
  • the grinding aid is expediently made of plastic. In a particularly advantageous embodiment, it is designed as part of a package for the twist drill.
  • the drill is thus delivered in the holder 2, so that when the drill is purchased, the customer immediately receives the associated grinding aid, which he can use at any time when regrinding the drill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP80106723A 1979-11-06 1980-11-01 Accessoire pour le meulage Withdrawn EP0028413A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19797931294 DE7931294U1 (de) 1979-11-06 1979-11-06 Schleifhilfe
DE7931294U 1979-11-06

Publications (1)

Publication Number Publication Date
EP0028413A1 true EP0028413A1 (fr) 1981-05-13

Family

ID=6708829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106723A Withdrawn EP0028413A1 (fr) 1979-11-06 1980-11-01 Accessoire pour le meulage

Country Status (3)

Country Link
EP (1) EP0028413A1 (fr)
DE (1) DE7931294U1 (fr)
DK (1) DK459480A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0143870A1 (fr) * 1983-10-27 1985-06-12 Robert Wolff Dispositif auxiliaire pour l'affûtage de forets hélicoidaux
CN110293457A (zh) * 2019-06-26 2019-10-01 中国航发贵州黎阳航空动力有限公司 一种手工刃磨钻头的方法及装置

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR369189A (fr) * 1906-08-24 1906-12-31 Otto Schoebe Pince pour l'émoulage des forets en spirale
US2317996A (en) * 1941-08-27 1943-05-04 William R Landy Lathe tool grinding fixture
US2365395A (en) * 1943-10-30 1944-12-19 Crowther David Holder for use in repointing twist drills
US2389679A (en) * 1944-02-14 1945-11-27 Michelson Julius Drill sharpening device
US2408544A (en) * 1945-01-01 1946-10-01 Banner Joseph Twist drill sharpener
CH257807A (de) * 1945-12-18 1948-10-31 Fredrik Benedicks Carl Axel Gerät zum Festhalten von Spiralbohrern beim Schärfen derselben.
US2821820A (en) * 1956-03-05 1958-02-04 Wesley W Thumann Guide for sharpening drill bits
CH327830A (de) * 1954-02-03 1958-02-15 Albert Dr Thurnherr Vorrichtung zum genauen Nachschleifen von Spiralbohrern
CH342109A (de) * 1955-09-12 1959-10-31 Flueckiger Willy Haltevorrichtung zum freihändigen Anschleifen der Schneidkanten an Spiralbohrern
US3121983A (en) * 1959-02-05 1964-02-25 Harvey W English Drill grinding attachment
US3169353A (en) * 1961-11-17 1965-02-16 Lester S Krulwich Drill grinding apparatus
GB988431A (en) * 1963-03-25 1965-04-07 Gordon Alexander Wellum Improved tool holder
US3393476A (en) * 1965-11-12 1968-07-23 Ausbie A. York Drill bit sharpening jig
US3411249A (en) * 1966-04-13 1968-11-19 Arland J. Tidwell Holder for sharpening edged tools

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR369189A (fr) * 1906-08-24 1906-12-31 Otto Schoebe Pince pour l'émoulage des forets en spirale
US2317996A (en) * 1941-08-27 1943-05-04 William R Landy Lathe tool grinding fixture
US2365395A (en) * 1943-10-30 1944-12-19 Crowther David Holder for use in repointing twist drills
US2389679A (en) * 1944-02-14 1945-11-27 Michelson Julius Drill sharpening device
US2408544A (en) * 1945-01-01 1946-10-01 Banner Joseph Twist drill sharpener
CH257807A (de) * 1945-12-18 1948-10-31 Fredrik Benedicks Carl Axel Gerät zum Festhalten von Spiralbohrern beim Schärfen derselben.
CH327830A (de) * 1954-02-03 1958-02-15 Albert Dr Thurnherr Vorrichtung zum genauen Nachschleifen von Spiralbohrern
CH342109A (de) * 1955-09-12 1959-10-31 Flueckiger Willy Haltevorrichtung zum freihändigen Anschleifen der Schneidkanten an Spiralbohrern
US2821820A (en) * 1956-03-05 1958-02-04 Wesley W Thumann Guide for sharpening drill bits
US3121983A (en) * 1959-02-05 1964-02-25 Harvey W English Drill grinding attachment
US3169353A (en) * 1961-11-17 1965-02-16 Lester S Krulwich Drill grinding apparatus
GB988431A (en) * 1963-03-25 1965-04-07 Gordon Alexander Wellum Improved tool holder
US3393476A (en) * 1965-11-12 1968-07-23 Ausbie A. York Drill bit sharpening jig
US3411249A (en) * 1966-04-13 1968-11-19 Arland J. Tidwell Holder for sharpening edged tools

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0143870A1 (fr) * 1983-10-27 1985-06-12 Robert Wolff Dispositif auxiliaire pour l'affûtage de forets hélicoidaux
CN110293457A (zh) * 2019-06-26 2019-10-01 中国航发贵州黎阳航空动力有限公司 一种手工刃磨钻头的方法及装置
CN110293457B (zh) * 2019-06-26 2022-02-11 中国航发贵州黎阳航空动力有限公司 一种手工刃磨钻头的方法及装置

Also Published As

Publication number Publication date
DK459480A (da) 1981-05-07
DE7931294U1 (de) 1980-06-26

Similar Documents

Publication Publication Date Title
DE2502183C3 (de) Einlippenbohrer
DE3231895C2 (de) Maschine zum Abfasen von Glasplattenkanten
DE2722794B2 (de) Kegelreibahle
DE2258062B2 (de) Einrichtung zum Herstellen von Form bohrungen
DE3022937A1 (de) Falz- oder nutenfraeser fuer die holz- oder kunststoffbearbeitung
EP0028413A1 (fr) Accessoire pour le meulage
DE2743258A1 (de) Klinge fuer papierschneidemaschinen und verfahren zu deren schleifen
DE3313367C2 (de) Skikantenschärfer
DE3429498C2 (fr)
EP0143870B1 (fr) Dispositif auxiliaire pour l'affûtage de forets hélicoidaux
DE2510960A1 (de) Schneidplatte
DE1627222C3 (de) Werkzeug zur Feinbearbeitung von Bohrungen, insbesondere Reibahle
DE1943705C3 (de) Hartkristallwerkzeug für Drehmaschinen
DE2756441C3 (de) Werkzeug für eine Fräswalze
DE2733945A1 (de) Schneidwerkzeug und verfahren zu seiner herstellung
DE750456C (de) Verfahren zur Herstellung von Schraempicken mit seitlich an einer Mittelrippe des Stahlschaftes angeloeteten Hartmetallplaettchen
DE2148829C3 (de) Mehrfachhalter für Schneidwerkzeuge der spanabhebenden Bearbeitung
DE856521C (de) Geraet zum Einarbeiten von Gleitschutzrillen in Laufmaentel von Kraftfahrzeugen
DE3119174A1 (de) "tischlerhandhobel"
DE3930225A1 (de) Bohrer und verwendung eines bohrers
DE810189C (de) Holzhobel
DE2946648C2 (de) Verfahren zum Profilieren und Scharfschleifen von Stabmessern
DE867508C (de) Vorrichtung zum Spitzen und Schaerfen von Bleistiften
DE3623175A1 (de) Verfahren zur herstellung eines nutfraesers und danach hergestellter nutfraeser
AT372011B (de) Handgeraet zur spanabhebenden bearbeitung von eine kante bildenden flaechen an sportgeraeten

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19810926

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19821009

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MOSER, BERNHARD

Inventor name: PEETZ, WOLFGANG, DIPL.-ING.