EP0385069B1 - Vorrichtung zum Schleifen der Spitzen von Wolfram-Elektroden - Google Patents

Vorrichtung zum Schleifen der Spitzen von Wolfram-Elektroden Download PDF

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Publication number
EP0385069B1
EP0385069B1 EP90100683A EP90100683A EP0385069B1 EP 0385069 B1 EP0385069 B1 EP 0385069B1 EP 90100683 A EP90100683 A EP 90100683A EP 90100683 A EP90100683 A EP 90100683A EP 0385069 B1 EP0385069 B1 EP 0385069B1
Authority
EP
European Patent Office
Prior art keywords
electrode
grinding wheel
collet
recess
axis
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
EP90100683A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0385069A3 (de
EP0385069A2 (de
Inventor
Werner Jankus
Andreas Hornung
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 EP0385069A2 publication Critical patent/EP0385069A2/de
Publication of EP0385069A3 publication Critical patent/EP0385069A3/de
Application granted granted Critical
Publication of EP0385069B1 publication Critical patent/EP0385069B1/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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/16—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli

Definitions

  • the invention relates to a device for grinding the tips of tungsten electrodes with a driven grinding wheel and an electrode holder for an electrode rotatably mounted therein about its axis, the electrode holder being arranged on a turntable and the turntable being pivotable about an axis orthogonal to the axis of the grinding wheel as well as in the direction of the axis of the grinding wheel and wherein the electrode holder has a carrier with two fixed abutments and a counter bearing for the electrode.
  • the tips of tungsten electrodes which are used in particular in TIG torches of computer-controlled welding machines, must be ground very precisely so that the arc burns evenly.
  • the grinding grooves of the electrode tip should run in the longitudinal direction of the electrode and the shape of the electrode tip should correspond as exactly as possible to a cone. This presupposes that the electrode tip is brought secantially to the front of the grinding wheel and ground. This can be achieved with devices known from the Praix.
  • the electrode is supported at a distance from the electrode end to be ground on an abutment which engages the electrode on the side facing the grinding wheel.
  • the counter bearing is a friction surface in this version, which is intended to set the electrode in rotation by reciprocating motion. This counter bearing or the friction surface engages approximately centrally on the fixed abutment.
  • the face of the electrode is supported on a stop in such a way that this end of the electrode can move relative to the stop.
  • the electrode holder has a chuck coupled to a drive motor for the electrode. So that the electrode holder has such large dimensions that the free end of the electrode with the electrode tip to be ground must protrude very far from the chuck, so that contact of the electrode holder with the grinding wheel is avoided.
  • Tungsten electrodes that are produced by sintering are usually not exactly straight, but they have more or less pronounced curvatures or deformations due to the manufacturing process. When the electrode tip is ground, these deformations mean that the cone axis of the electrode tip does not coincide with the longitudinal axis of the electrode.
  • An arrangement of the taper axis that is as offset-free as possible is also a prerequisite for a flawless welding process. Similar problems occur with other devices known from practice, in which the tungsten electrode is arranged with play in the electrode holder and is guided by hand.
  • the object of the invention is to reduce the influence of deformations of the tungsten electrodes when grinding the electrode tip.
  • an electrode receiving collet is provided that a fixed abutment at the free electrode end on the side facing away from the grinding wheel and the other fixed abutment at the electrode distal end of the collet facing away from the grinding wheel Side attacks, and that the collet with the electrode pressing against the fixed abutment resiliently engages in the central region of the collet on the side facing the grinding wheel.
  • the free electrode end is guided in the immediate vicinity of the tip to be ground on the associated fixed abutment, so that production-related Deformation of the electrode has no or only a slight effect when grinding the electrode tip. Since the collet also only requires small dimensions, the free electrode end protruding over the collet need only be short.
  • the three-point bearing of the collet with the electrode clamped in it also enables play-free guidance during grinding.
  • the counter bearing can be supported on a spring or designed as a spring, so that when the Collet with clamped electrode, any irregularities in the collet can be compensated for.
  • the resilient counter bearing enables easy assembly and disassembly of the collet on the carrier.
  • the fixed abutment for the free electrode end has a wedge-shaped end with at least one recess for the electrode end, the recess being designed in particular as a groove with a triangular cross section.
  • the free electrode end is supported in this recess without play even when the electrode is rotated about its axis.
  • the wedge-shaped design of the projection makes it possible to place the projection very close behind the electrode tip to be ground. It is understood that the depth of the recess is limited and the electrode end is mounted therein so that the projection cannot touch the grinding wheel.
  • the abutment can be arranged so as to be pivotable and height-adjustable on a pin standing up from the turntable. With the swivel adjustment the abutment can be brought very close to the electrode tip. With the height adjustment, the electrode tip can be brought up to different radial areas of the grinding wheel and the grinding wheel can thus be better used.
  • the collet can have an annular groove at the end remote from the electrode and the associated abutment can consist of a projection with a recess engaging in the annular groove.
  • a three-point bearing is possible in that the annular groove has a cross-section in the form of a segment of a circle and that the recess is triangular, one side of the recess is flat and on the other side a rib with a spline is provided, which extends in the direction of the annular groove. Then it is ensured that with all adjustment movements of the front, free electrode end there is a three-point bearing effective even when the collet is rotated about its longitudinal axis.
  • the collet can have a hand crank for rotating about its longitudinal axis at the end remote from the electrode.
  • both the turntable and the dovetail guide have devices for adjusting and fixing and, if appropriate, measuring scales.
  • a protective shield which at least partially surrounds the grinding wheel and has a slot which extends in the direction of the axis of the grinding wheel, with a in the region of the free slot end Electrode support is arranged.
  • the electrode inserted into the slot and resting on the electrode support is guided against the peripheral edge of the grinding wheel and rotated about its longitudinal axis. If a circumferential groove has been ground in, the electrode can be separated by a stroke in the area of the circumferential groove.
  • the device shown is used for grinding the tips of tungsten electrodes.
  • the device includes a plate 1 on which a drive motor 2 for a grinding wheel 3 driven thereby is mounted.
  • a slide 5 is guided on the plate 1 with a dovetail guide 4 and is adjustable in the direction of the axis 6 of the grinding wheel 3.
  • the carriage 5 is tensioned with a spring 7 in the direction of an adjusting screw, with which it can be adjusted.
  • a turntable 9 is mounted in front of the grinding wheel 7, which can be fixed in different angular positions relative to the carriage 5 with the aid of a locking screw 10 which passes through an associated slot 11 of the plate 1.
  • a locking screw 10 which passes through an associated slot 11 of the plate 1.
  • a carrier 13 On the turntable 8, a carrier 13 is fixed, which holds a substantially cylindrical collet 14 for the electrode.
  • the electrode is inserted into the collet 14 so far that only a short free electrode end 15 protrudes in the direction of the grinding wheel 3.
  • the collet 14 with the free electrode end 15 is held on the carrier 13 with a three-point bearing.
  • the carrier 13 has a fixed abutment 16 for the free electrode end 15 and a fixed abutment 17 for the end of the collet 14 remote from the electrode as well as a resilient counter bearing 18 which engages in the central region of the collet 14.
  • the fixed abutment 16 for the free electrode end 15 has a wedge-shaped end 19 with two differently sized recesses 20, 21 arranged one above the other.
  • the recesses 20, 21 are each formed as a groove with a triangular cross section for receiving electrode ends 15 with different diameters.
  • the respective groove depth is set up so that the end of the abutment 16 does not touch the grinding wheel 3 even if the abutment 16 is placed in the immediate vicinity of the electrode tip to be ground.
  • the abutment 16 is arranged on a pin 22 standing up from the turntable 9 so as to be pivotable and adjustable in height.
  • the swivel adjustment serves to support the free electrode end 15 as close as possible to the electrode tip to be ground. With the height adjustment, the electrode end 15 can be brought to different radii of the grinding wheel 3 for better utilization of the grinding wheel 3.
  • the abutment 16 is fixed in the desired position.
  • the abutment 17 acting on the end of the collet 14 remote from the electrode has a projection 25 with a recess 26 which engages in an annular groove 24 in the collet 14.
  • the annular groove has a cross-section in the form of a segment of a circle.
  • the recess 26 is triangular.
  • One side 27 of the recess 26 is flat.
  • the other side of the recess 26 is formed by a rib 28 with a wedge profile, which extends in the direction of the annular groove 24. This ensures that, regardless of the setting of the other abutment 16, the end of the collet 14 remote from the electrode is supported with a three-point bearing without play.
  • the electrode To grind the electrode, it is clamped in the collet 14.
  • the collet is inserted into the carrier 12, with the resilient counter bearing 18 evading somewhat when inserted. Then the resilient counter bearing 18 holds the collet 14 with the protruding electrode end 15 in the abutments 16, 17.
  • the abutment 16 on the grinding wheel side is set so that it engages as close as possible to the electrode tip to be ground.
  • the carriage 6 is set in the direction of the grinding wheel 3 with the aid of the adjusting screw 8.
  • the collet 14 is rotated with the aid of a hand crank 29 provided at its end remote from the electrode.
  • the electrode After grinding the electrode tip, the electrode can be cut to a predetermined size.
  • a protective shield 30 surrounding the grinding wheel 3 there is a slot 31 which extends in the direction of the grinding wheel axis 6 and a support 32 in the region of the free slot end.
  • the electrode is inserted into the slot 31 by hand and at an angle to the grinding wheel axis 6 and on the support 32 supported.
  • the electrode is then against the peripheral edge 33 of the grinding wheel 1 guided and rotated about its longitudinal axis. This creates a circumferential groove as a predetermined breaking point. If you hit the predetermined breaking point, the electrode breaks at this point.
  • the electrode can also be cut to length before grinding, because with this device the tips of very short electrodes can be ground.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP90100683A 1989-03-01 1990-01-13 Vorrichtung zum Schleifen der Spitzen von Wolfram-Elektroden Expired - Lifetime EP0385069B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8902380U 1989-03-01
DE8902380U DE8902380U1 (de) 1989-03-01 1989-03-01 Vorrichtung zum Schleifen der Spitzen von Wolfram-Elektroden

Publications (3)

Publication Number Publication Date
EP0385069A2 EP0385069A2 (de) 1990-09-05
EP0385069A3 EP0385069A3 (de) 1991-01-09
EP0385069B1 true EP0385069B1 (de) 1993-05-19

Family

ID=6836510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100683A Expired - Lifetime EP0385069B1 (de) 1989-03-01 1990-01-13 Vorrichtung zum Schleifen der Spitzen von Wolfram-Elektroden

Country Status (4)

Country Link
US (1) US5001868A (zh)
EP (1) EP0385069B1 (zh)
JP (1) JPH0710489B2 (zh)
DE (2) DE8902380U1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9573237B2 (en) 2012-08-31 2017-02-21 Matuschek Messtechnik Gmbh Device and method for grinding workpieces, in particular welding electrodes
US9579770B2 (en) 2014-02-25 2017-02-28 Matuschek Messtechnik Gmbh Device and method for grinding workpieces using a control unit

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8902380U1 (de) * 1989-03-01 1989-04-20 Hornung, Andreas, 4708 Kamen Vorrichtung zum Schleifen der Spitzen von Wolfram-Elektroden
JP2511525Y2 (ja) * 1990-09-27 1996-09-25 彰久 村田 電極棒研磨機
US5184432A (en) * 1991-09-13 1993-02-09 Wilson John W Tool for sharpening tungsten electrodes
US5259146A (en) * 1992-08-11 1993-11-09 Jinkins Perry L Device and method for shaping the end of a rod
DK9500123Y6 (da) * 1995-03-27 1995-05-15 Euro Tool Aps Apparat til slibning af svejseelektroder, navnligwolframelektroder
FR2747332B1 (fr) * 1996-04-12 1998-05-29 Emmanuel Maurin Dispositif pour l'affutage des electrodes de soudure
DK199801383A (da) * 1998-10-27 2000-04-28 Heine Plougman Olsen Apparat, navnlig til slibning af elektroder til TIG-svejsning
US7219408B2 (en) * 2002-09-24 2007-05-22 General Electric Company Tool for securing a component
US6830240B2 (en) * 2002-09-24 2004-12-14 General Electric Company Methods and apparatus for securing components for manufacture
SE522632C2 (sv) * 2003-03-04 2004-02-24 Lars Hall Apparat för slipning av en elektrod för ett TIG-svetshandtag
US20050268461A1 (en) * 2004-06-07 2005-12-08 Ouellette Randall M Method and apparatus for securing turbine components for manufacture
US7762534B2 (en) * 2004-06-07 2010-07-27 General Electric Company Method and apparatus for supporting turbine components for manufacture
JP2009125913A (ja) * 2007-11-28 2009-06-11 Nagano Automation Kk 研磨装置
CN102107383A (zh) * 2010-11-30 2011-06-29 聚光科技(杭州)股份有限公司 一种电极表面处理方法及装置
WO2013189497A1 (en) * 2012-06-18 2013-12-27 PAGAARD, Jan Apparatus for wet grinding of welding electrodes, particularly tungsten electrodes
CN103213054B (zh) * 2012-12-14 2015-08-19 广州中船黄埔造船有限公司 一种活动顶尖修磨装置及其修磨方法

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US970227A (en) * 1910-02-09 1910-09-13 Eugene Homan Glass-beveling machine.
US2068915A (en) * 1932-07-21 1937-01-26 Gordon D Hardin Drill grinding appliance
FR812340A (fr) * 1936-01-15 1937-05-07 Machine à affûter les mèches de forets
GB570229A (en) * 1944-05-15 1945-06-27 David Thomas Edward Fielding Improvements in machines for grinding drills and similar tools
US2662352A (en) * 1950-02-23 1953-12-15 Rhodes Clement Tipton Precision grinding machine
FR1281421A (fr) * 1960-12-01 1962-01-12 Perfectionnements apportés aux machines-outils, en particulier aux machines à affûter les fraises destinées aux machines à graver et à reproduire
DE1955787U (de) * 1966-12-21 1967-02-16 Metabowerke Kg Schleifvorrichtung fuer elektroden.
JPS5251197A (en) * 1975-10-21 1977-04-23 Nisshin Daiyamondo Kk Device for grinding lapping needle of ultrasonic machine apparatus
CH653589A5 (en) * 1981-08-31 1986-01-15 Megomat Ag Drill-clamping device for a grinding machine for small drills
DE3305149C1 (de) * 1983-02-15 1984-06-20 Hadres Werkzeugfabrik Bodo Heinrich Habel, 6800 Mannheim Schleifmaschine zum Herstellen einer kegelförmigen Spitze an einem Rundstab
SU1328163A1 (ru) * 1985-03-19 1987-08-07 Предприятие П/Я М-5729 Устройство дл шлифовани
DE8902380U1 (de) * 1989-03-01 1989-04-20 Hornung, Andreas, 4708 Kamen Vorrichtung zum Schleifen der Spitzen von Wolfram-Elektroden

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED Sektion Mechanik, Woche 8811, Zusammenfassung Nr. 076041, M23, 17. März 1988, Derwent Publications, London, GB, & SU-A-1328163 (PONOMAREV KE) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9573237B2 (en) 2012-08-31 2017-02-21 Matuschek Messtechnik Gmbh Device and method for grinding workpieces, in particular welding electrodes
US9579770B2 (en) 2014-02-25 2017-02-28 Matuschek Messtechnik Gmbh Device and method for grinding workpieces using a control unit

Also Published As

Publication number Publication date
US5001868A (en) 1991-03-26
JPH02279266A (ja) 1990-11-15
EP0385069A3 (de) 1991-01-09
JPH0710489B2 (ja) 1995-02-08
DE59001464D1 (de) 1993-06-24
EP0385069A2 (de) 1990-09-05
DE8902380U1 (de) 1989-04-20

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