EP1470891B1 - Schleifwerkzeug zum Schärfen von Werkstücken - Google Patents

Schleifwerkzeug zum Schärfen von Werkstücken Download PDF

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Publication number
EP1470891B1
EP1470891B1 EP04007185A EP04007185A EP1470891B1 EP 1470891 B1 EP1470891 B1 EP 1470891B1 EP 04007185 A EP04007185 A EP 04007185A EP 04007185 A EP04007185 A EP 04007185A EP 1470891 B1 EP1470891 B1 EP 1470891B1
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding tool
holder
working part
clamping part
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
EP04007185A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1470891A1 (de
Inventor
Walter Thomaschewski
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.)
C&E Fein GmbH and Co
Original Assignee
C&E Fein GmbH and Co
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 C&E Fein GmbH and Co filed Critical C&E Fein GmbH and Co
Publication of EP1470891A1 publication Critical patent/EP1470891A1/de
Application granted granted Critical
Publication of EP1470891B1 publication Critical patent/EP1470891B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades

Definitions

  • the invention relates to a grinding tool for sharpening workpieces, in particular tools, with an oscillatory drive, the output shaft is driven to oscillate about its longitudinal axis, and on which a holder for fixing a working part is provided, wherein the working part is provided with abrasive particles and wherein the holder fixed holding portion and a releasable clamping member, between which the working part can be clamped by means of at least one clamping element at one end.
  • a grinding tool of this type is known from DE 100 58 894 A1.
  • the known tool has an oscillation drive whose output shaft can be driven to oscillate about its longitudinal axis with a small pivoting angle and high frequency.
  • a holder On the output shaft of the oscillation drive, a holder is fixed, which is designed to receive a working part between a fixed holding portion and a releasable clamping member by means of two clamping screws.
  • various tools can be attached to perform various cutting and / or grinding work can.
  • the working part may, for example, have a toothed cutting edge on its outer end face, may be formed as a cutting blade with a crescent-shaped curvature or, for example, may also have a cutting edge equipped with diamond or carbide.
  • a grinding tool for sharpening workpieces in particular tools, with an oscillation drive, the output shaft is driven to oscillate about its longitudinal axis, and on which a holder for fixing a working part is provided, wherein the working part designed as a grinding plate with a flat grinding surface is, which is held by the holder on a to the output shaft approximately perpendicular plane, wherein the holder has a fixed holding portion and a releasable clamping member between which the working part is clamped by means of at least one clamping element at one end, wherein the clamping part has an outer surface which is formed as a guide surface for abutment with a surface of a workpiece for setting a predetermined angle between the surface of the workpiece and the grinding surface.
  • a grinding tool for sharpening workpieces by means of an oscillation drive is now provided with particularly simple means, the output shaft is driven to oscillate about its longitudinal axis.
  • the setting of a predetermined sharpening angle on the workpiece to be sharpened is made possible by a specially designed clamping part, which serves as a guide surface for abutment of a surface of a workpiece to be sharpened.
  • the grinding surface of the working part is located at a considerable distance from the output shaft, that is, for example, at a distance of about 5 cm, with the help of the oscillating drive achieved with a small pivoting angle (about 0.5 to 7 °) and high frequency (about 5000 to 30,000 cycles per minute) a high sharpening power. Even larger objects, such as axes, garden tools and the like. Can be sharpened in this way evenly and with little effort.
  • the grinding tool can of course be used advantageously for other grinding or deburring. If, for example, using a working part in the form of a saw blade, a sawing work is first carried out, for example, at a location which is difficult to access, the same cut can then be deburred after a replacement of the working part against a grinding plate with a flat grinding surface.
  • the predetermined by the angle between the outer surface of the clamping part and the grinding surface sharpening angle ⁇ between about 10 ° and 40 °, preferably about 15 °.
  • a sharpening angle of 15 ° most known tools, such as scissors, various knives and the like can be sharpened precisely.
  • a plurality of interchangeable clamping parts may be provided, which are designed for different sharpening angle.
  • clamping part can in principle be designed to be adjustable in order to be able to set different sharpening angles.
  • the outer surface of the clamping part runs in a circular arc against its inner surface facing the working part.
  • the geometric center of the circular arc is preferably in a mounting opening of the holder for connection to the output shaft of the oscillation drive. This ensures that the removal rate of the grinding tool is always the same when following a tool to be sharpened on the clamping part.
  • the working part in the form of the sanding plate preferably has an abrasive surface on each of the two opposite outer surfaces.
  • both grinding surfaces project outward relative to the fixed holding section and opposite the clamping part.
  • a grinding tool according to the invention is designated overall by the numeral 10.
  • the grinding tool has an oscillating drive 12, which is indicated only schematically, which oscillates a drive shaft 14 so as to oscillate about its longitudinal axis 18, wherein a small pivoting angle of e.g. 0.5 to 5 ° and a high frequency of about 5000 to 30,000 oscillations per minute is achieved.
  • oscillatory drives are known and are used, for example, for severing an adhesive bead on a windshield in conjunction with a correspondingly shaped cutting blade, provided that the windshield has to be exchanged because of a defect, for example.
  • oscillating driven tools for many other work have proven to be advantageous, including the most diverse sawing tools of elongated, circular or part-circular shape, grinding tools of special shape or cutting tools in the form of specially trained cutting knives are known.
  • a working part 24 between a fixed holding portion 26 and a clamping member 22 can now be exchangeably secured.
  • the working part 24 is clamped between the fixed holding portion 26 and the clamping member 22 by means of clamping elements, for example in the form of clamping screws at a first end, while it protrudes with the other end to the outside over the holding portion 26 and over the clamping member 22 addition.
  • Such a structure is basically known from DE 100 58 894 A1.
  • the grinding tool 10 now differs from the previously known grinding tool in that the clamping part 22 has an outer surface which is designed as a guide surface for engaging a surface of a workpiece for setting a predetermined angle between the outer surface and the grinding surface.
  • the working part 24 is provided with a special coating of diamond or hard metal preferably on both opposite sides to allow sharpening of tools with a predetermined sharpening angle and to perform filing and deburring can.
  • the holder 20 has, at its end opposite the working part 24, a fastening opening 42, through which the fastening screw 30 passes, interposing the clamping disk 28, into the output shaft 14 of the oscillating drive 12 can be screwed.
  • a fastening opening 42 through which the fastening screw 30 passes, interposing the clamping disk 28, into the output shaft 14 of the oscillating drive 12 can be screwed.
  • In the outer region of the holder 20 has a rectangular cross-section recess is defined, which is bounded by the surface of a fixed holding portion 26 on its underside and limited by a perpendicular thereto extending end face 27 at its mounting opening 42 side facing.
  • the two clamping screws 36, 40 are preferably sunk in corresponding recesses 34, 38 of the clamping member 22 received.
  • the outer surface 44 of the clamping member 22 merges with the solid support portion 26 facing inner surface 46 outwardly at an acute angle ⁇ and ends in a circular arc 48 on the surface of the working part 24th
  • the outer surface 44 of the clamping member 22 serves as a guide surface.
  • an angle ⁇ can be maintained between the flat grinding surface 32 on the side facing the workpiece 50 and the surface 44 of the clamping part 22 so that a cutting edge 52 to be sharpened sharpened precisely at this sharpening angle ⁇ at the outer end of the workpiece 50 to be sharpened can be.
  • ⁇ which are preferably in the range between about 10 ° and 40 °.
  • a clamping member 22 is preferred with an angle ⁇ of about 15 °, since this is the most commonly used sharpening angle of the most diverse knives, scissors and other tools.
  • other sharpening angles can be adjusted by replacing the clamping part, as shown for example by way of the clamping part 22a of FIG. 4.
  • the outer surface 44 of the clamping part 22 according to FIG. 2 runs together in a circular arc 48 with the inner surface 46 of the clamping part.
  • the center of this circular arc 48 is located in the center of the mounting hole 42. This ensures that the removal rate of the grinding surface 32 is always the same when following a workpiece 50 to be sharpened on the outer surface 44 of the clamping member 22. This allows a relatively uniform and precise sharpening of tools or knives.
  • the working part 24 in the form of the grinding plate is made of metal and is expediently formed on both opposite outer surfaces as a grinding surface 32 and 33, respectively.
  • the abrasive surfaces are either diamond abrasive particles or carbide abrasive particles embedded in a suitable bonding layer.
  • the clamping element 22 or 22a is preferably (as well as the holder) made of plastic.
  • a low-friction contact with the outer surface of the clamping element on a workpiece to be sharpened can be achieved by a suitable choice of material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP04007185A 2003-03-31 2004-03-25 Schleifwerkzeug zum Schärfen von Werkstücken Expired - Lifetime EP1470891B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20305402U DE20305402U1 (de) 2003-03-31 2003-03-31 Schleifwerkzeug zum Schärfen von Werkzeugen
DE20305402U 2003-03-31

Publications (2)

Publication Number Publication Date
EP1470891A1 EP1470891A1 (de) 2004-10-27
EP1470891B1 true EP1470891B1 (de) 2006-08-23

Family

ID=7981320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04007185A Expired - Lifetime EP1470891B1 (de) 2003-03-31 2004-03-25 Schleifwerkzeug zum Schärfen von Werkstücken

Country Status (5)

Country Link
US (1) US7115027B2 (es)
EP (1) EP1470891B1 (es)
AT (1) ATE337135T1 (es)
DE (2) DE20305402U1 (es)
ES (1) ES2270208T3 (es)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD619152S1 (en) 2009-12-18 2010-07-06 Techtronic Power Tools Technology Limited Adapter
USD623034S1 (en) 2009-12-18 2010-09-07 Techtronic Power Tools Technology Limited Tool arbor
US9073195B2 (en) 2010-04-29 2015-07-07 Black & Decker Inc. Universal accessory for oscillating power tool
US9186770B2 (en) 2010-04-29 2015-11-17 Black & Decker Inc. Oscillating tool attachment feature
US8925931B2 (en) 2010-04-29 2015-01-06 Black & Decker Inc. Oscillating tool
USD653523S1 (en) 2010-09-29 2012-02-07 Milwaukee Electric Tool Corporation Adapter for a tool
USD651062S1 (en) 2010-09-29 2011-12-27 Milwaukee Electric Tool Corporation Tool interface for an accessory
USD646542S1 (en) 2010-09-29 2011-10-11 Milwaukee Electric Tool Corporation Accessory interface for a tool
US9149923B2 (en) 2010-11-09 2015-10-06 Black & Decker Inc. Oscillating tools and accessories
USD832666S1 (en) 2012-07-16 2018-11-06 Black & Decker Inc. Oscillating saw blade
US9555554B2 (en) 2013-05-06 2017-01-31 Milwaukee Electric Tool Corporation Oscillating multi-tool system
DE102013107867A1 (de) * 2013-07-23 2015-02-19 C. & E. Fein Gmbh Oszillationswerkzeug
USD814900S1 (en) 2017-01-16 2018-04-10 Black & Decker Inc. Blade for oscillating power tools
US10265778B2 (en) 2017-01-16 2019-04-23 Black & Decker Inc. Accessories for oscillating power tools
US10906108B2 (en) * 2018-04-24 2021-02-02 Robert Bosch Tool Corporation Blade accessory with guide

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2087023A (en) * 1937-02-15 1937-07-13 Decker Reuben Shelley Scissors sharpener and stone holder
US2519351A (en) * 1947-03-22 1950-08-22 Glen M Calvert Knife sharpening machine
US2457714A (en) * 1947-05-12 1948-12-28 William R Pancoast Knife sharpener
US2559273A (en) * 1950-07-17 1951-07-03 Glenn A Brinkley Knife sharpener
US2758431A (en) * 1954-10-13 1956-08-14 Hoover Co Knife sharpener attachment for mixer
US2949709A (en) * 1958-04-15 1960-08-23 Dynamics Corp America Knife sharpener attachment
US3651715A (en) * 1970-05-04 1972-03-28 Szerszamgepipari Muevek Saw sharpener, particularly to sharpen jump saws
US4128970A (en) * 1977-02-28 1978-12-12 Peter Sawrenko Hone
US4202093A (en) * 1978-03-13 1980-05-13 Wallerstein Martin A Low cost, renewable scraping implement
DE3814554A1 (de) * 1988-04-29 1989-11-09 Fein C & E Schneidmesser
US5363602A (en) * 1989-09-11 1994-11-15 The Great American Tool Company, Inc. Blade sharpener
US5209022A (en) * 1992-01-10 1993-05-11 Wahl Clipper Corporation Edge sharpening or surface abrading apparatus
US5219378A (en) * 1992-04-28 1993-06-15 Arnold Robert A Reciprocating cutting tool and method
US6506106B2 (en) * 2000-09-06 2003-01-14 Charles J. Fletcher Automated razor sharpening device
DE10058894A1 (de) * 2000-11-23 2002-06-06 C & E Fein Gmbh & Co Kg Werkzeug mit einem Halter zur Befestigung an einer Antriebswelle
DE10058594A1 (de) 2000-11-25 2002-06-13 Bosch Gmbh Robert Elektronikvorrichtung für ein Kraftfahrzeug

Also Published As

Publication number Publication date
DE502004001235D1 (de) 2006-10-05
EP1470891A1 (de) 2004-10-27
ATE337135T1 (de) 2006-09-15
US7115027B2 (en) 2006-10-03
US20040253913A1 (en) 2004-12-16
ES2270208T3 (es) 2007-04-01
DE20305402U1 (de) 2003-05-28

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