US3869373A - Contact device for electrochemically deburring workpieces - Google Patents

Contact device for electrochemically deburring workpieces Download PDF

Info

Publication number
US3869373A
US3869373A US359416A US35941673A US3869373A US 3869373 A US3869373 A US 3869373A US 359416 A US359416 A US 359416A US 35941673 A US35941673 A US 35941673A US 3869373 A US3869373 A US 3869373A
Authority
US
United States
Prior art keywords
contact
grooves
carrier means
casing
contact carrier
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
US359416A
Other languages
English (en)
Inventor
Hans-Dieter Schacher
Reinhold Fischer
Matthias Kunst
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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
Priority claimed from DE19722223152 external-priority patent/DE2223152C3/de
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Application granted granted Critical
Publication of US3869373A publication Critical patent/US3869373A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H11/00—Auxiliary apparatus or details, not otherwise provided for
    • B23H11/006—Electrical contacts or wires

Definitions

  • the present invention relates to a device for electrochemically deburring workpieces which are connected as anodes, with a shaped tool electrode serving as cathode and with electrolyte flowing between the anode and the cathode, whereby the supply of the energy to the workpiece takes place by way of an anode contact which, with the exception of the supply cable connection and the contact surface, is jacketed or encased with an insulating material. Material is removed locally limited at the workpiece by means of the formed electrode dependent on the flowing current and is conducted away by the electrolyte flow.
  • anode contacts are used which are connected with the power source andare pressed against the workpiece at places provided therefor and thus establish the electrical contact.
  • Anode contacts are in use at present which are coated or covered at their contact surface with a platinum layer. These anode contacts are therefore quite costly, particularly as they are used in relatively larger numbers in such installations. Principally due to the electric load, the service lives of such anode contact are relatively small and the connecting places, principally soldered (brazed) or welded connections, between the platinum and the contact carrier are also reached and attacked by the electrolyte.
  • the contact body of the anode contact consists of tungsten and in that this contact body is connected by friction welding with the contact carrier made from a conventional copper-chrome alloy.
  • a further cause for the contact troubles is the inference of hardness and density of the workpiece to be treated.
  • platinum exhibits a relatively high susceptibility to trouble compared to Wolfram with the usual materials having a hardness of about 50 kp/mm and thereabove, the conditions reverse only with an increasing workpiece hardness. With respect to the tendency of welding together, platinum is dependent on the hardness of the workpiece whereas tungsten is not influenced thereby.
  • a significant factor for the service life is the connection between contact carrier and contact body which is traversed by the current. It is possible with the aid of conventional friction welding to manufacture contact anodes from this material combination of the present invention, in which the service life of the connection lies above that of the contact material.
  • the contact body and/or contact carrier is provided at least at the places corresponding to the end of the insulating jacket or casing with grooves extending over the circumference into which engages the jacket or casing.
  • Another object of the present invention resides in an apparatus for electrochemically deburring workpieces which avoids the need for expensive materials at the contact surface, yet improves the overall service life of the anode contacts thereof.
  • a further object of the present invention resides in a contact anode for use in installations for the electrochemical deburring of workpieces which have a greater length of life and is substantially less prone to trouble in operation.
  • Still a further object ofthe present. invention resides in an anode contact of the type described above which is more fully protected against attack by the electrolyte yet utilizes considerably more inexpensive materials.
  • the single FIGURE is a cross-sectional view through a contact anode according to the present invention.
  • reference numeral 1 designates therein a contact carrier which is made of a conventional copper-chrome alloy.
  • a contact body 3 made of tungsten is connected with the contact carrier 1 by a friction welded connection 2.
  • Both the contact carrier 1 and the contact body 3 are provided with grooves 4, into which engage the insulating-casing or jacket 5 made of casting resin of conventional type, such as, conventional synthetic resinous casting material.
  • These grooves 4 at the contact carrier I serve for the better connection between the contact carrier l and the insulating casing 5 whereas these grooves 4 at the contact body 3 prevent the electrolyte from reaching the connection 2 between the contact body 3 and the contact carrier 1.
  • the contact carrier 1 is constructed as threaded ular to the axis, serves as abutment surface for a coil spring (not shown), by means of which the anode contact is pressed against the workpiece (not shown).
  • a typical example of a copper-chrome alloy for use with thecontact carrier 1 is the alloy sold commercially under the tradename Elmedur X which contains about 0.5 to about 1% by weight of chrome and about 0.05% by weight zirconium, the remainder essentially copper.
  • Elmedur X which contains about 0.5 to about 1% by weight of chrome and about 0.05% by weight zirconium, the remainder essentially copper.
  • every other copper-chrome alloy may be used with the contact carrier 1 as known to those skilled in the art.
  • a typical example for the synthetic resinous casting material of the jacket or casing 5 is Bussolit gefullt (fi]led) though every other appropriate casting resin as known to those skilled in the art, such as epoxy resins and acrylic resins, may also be used.
  • a device'for the electrochemical tially of tungsten for providing said contact surface and a contact carrier means frictionally welded to said contact body means and made of a metal consisting of a copper-chrome alloy, and said insulating material forms a casing forthe contact body means and the contact carrier means, at least one of said contact body deburring of workpieces that are to be connected as anodes which means and said contact carrier means being provided with circumferentially ext-ending grooves at'least at places corresponding to an end ofthe insulating casing adjacent to anend of the anode contact means, said casing engaging in said grooves.
  • a device characterized in that said grooves are provided in places of the contact body means corresponding to the end of the insulating casing.
  • a device characterized in that said. grooves are provided in the contact body means below said contact carrier means to prevent the electrolyte from reaching the connection between contact body means and contact carrier means.
  • a device characterized in that said grooves are provided in the contact carrier means above said contact body means for anchoring the casing.
  • an electrode contact device forfeeding current to a workpiece to be electrochemically deburred, which comprises a contact carrier meansadapted to be connected to a power source and made of a metal consisting essentially of a copper-chrome alloy, a contact body means connected to said contact carrier means, said contact carrier means being made of a metal consisting essentially of tungsten, and an insulating casing substantially completely enclosing said carrier means and said body means except at anelec'trical feed connection of the former and a contact area of the latter the improvement which comprises said contact body means being connected to said contact carrier means by a friction weld, and said contact body means being provided with a plurality of circumferentially extending grooves at least at places adjacent to the contact area and said casing engaging in said grooves and in portions of said contact'body means between said grooves.
  • A. device characterized in that the contact carrier means is provided with a plurality of circumferentially extending grooves at least in places corresponding to the end of the insulating casing, adjacent to said electrical feed connection, and said casing engaging in said grooves and those portions of the contact carrier means between said grooves.
  • a device characterized in that said insulating casing is made of a material consisting essentially of casting resin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Arc Welding In General (AREA)
US359416A 1972-05-12 1973-05-11 Contact device for electrochemically deburring workpieces Expired - Lifetime US3869373A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722223152 DE2223152C3 (de) 1972-05-12 Kontaktanode zum elektrochemischen Formentgraten

Publications (1)

Publication Number Publication Date
US3869373A true US3869373A (en) 1975-03-04

Family

ID=5844709

Family Applications (1)

Application Number Title Priority Date Filing Date
US359416A Expired - Lifetime US3869373A (en) 1972-05-12 1973-05-11 Contact device for electrochemically deburring workpieces

Country Status (4)

Country Link
US (1) US3869373A (enrdf_load_html_response)
JP (1) JPS5536080B2 (enrdf_load_html_response)
FR (1) FR2184751B1 (enrdf_load_html_response)
GB (1) GB1368930A (enrdf_load_html_response)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4260212A (en) * 1979-03-20 1981-04-07 Amp Incorporated Method of producing insulated terminals
WO1996020804A1 (de) * 1995-01-03 1996-07-11 Robert Bosch Gmbh Kontaktteil zur stromübertragung auf ein werkstück bei der elektrochemischen materialbearbeitung
US5921848A (en) * 1995-03-17 1999-07-13 Flat Rock Metal, Inc. Multi-directional abrading machine
US20050069837A1 (en) * 2003-05-13 2005-03-31 Paul Lewis Methods for manufacturing endodontic instruments
US6968619B2 (en) 2003-05-13 2005-11-29 Ultradent Products, Inc. Method for manufacturing endodontic instruments
US20060185169A1 (en) * 2005-02-23 2006-08-24 Paul Lewis Methods for manufacturing endodontic instruments
US20070116532A1 (en) * 2005-11-18 2007-05-24 Ultradent Products, Inc. Methods for manufacturing endodontic instruments by milling
US7743505B2 (en) 2005-02-23 2010-06-29 Ultradent Products, Inc. Methods for manufacturing endodontic instruments from powdered metals

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599823U (ja) * 1982-07-09 1984-01-21 三菱重工業株式会社 輪転印刷機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708181A (en) * 1951-05-17 1955-05-10 Indiana Steel & Wire Company I Electroplating process
US3654122A (en) * 1969-06-27 1972-04-04 Anocut Eng Co Workpiece holding fixture for electrolytic shaping apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708181A (en) * 1951-05-17 1955-05-10 Indiana Steel & Wire Company I Electroplating process
US3654122A (en) * 1969-06-27 1972-04-04 Anocut Eng Co Workpiece holding fixture for electrolytic shaping apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4260212A (en) * 1979-03-20 1981-04-07 Amp Incorporated Method of producing insulated terminals
WO1996020804A1 (de) * 1995-01-03 1996-07-11 Robert Bosch Gmbh Kontaktteil zur stromübertragung auf ein werkstück bei der elektrochemischen materialbearbeitung
US5672254A (en) * 1995-01-03 1997-09-30 Robert Bosch Gmbh Contact element for transmitting current to a workpiece for use in electrochemical material working
US5921848A (en) * 1995-03-17 1999-07-13 Flat Rock Metal, Inc. Multi-directional abrading machine
US20050069837A1 (en) * 2003-05-13 2005-03-31 Paul Lewis Methods for manufacturing endodontic instruments
US6968619B2 (en) 2003-05-13 2005-11-29 Ultradent Products, Inc. Method for manufacturing endodontic instruments
US7398598B2 (en) 2003-05-13 2008-07-15 Ultradent Products, Inc. Methods for manufacturing endodontic instruments
US20060185169A1 (en) * 2005-02-23 2006-08-24 Paul Lewis Methods for manufacturing endodontic instruments
US7665212B2 (en) 2005-02-23 2010-02-23 Ultradent Products, Inc. Methods for manufacturing endodontic instruments
US7743505B2 (en) 2005-02-23 2010-06-29 Ultradent Products, Inc. Methods for manufacturing endodontic instruments from powdered metals
US20070116532A1 (en) * 2005-11-18 2007-05-24 Ultradent Products, Inc. Methods for manufacturing endodontic instruments by milling
US7322105B2 (en) 2005-11-18 2008-01-29 Ultradent Products, Inc. Methods for manufacturing endodontic instruments by milling

Also Published As

Publication number Publication date
FR2184751A1 (enrdf_load_html_response) 1973-12-28
DE2223152A1 (de) 1973-11-22
FR2184751B1 (enrdf_load_html_response) 1976-11-12
DE2223152B2 (de) 1977-03-24
JPS503043A (enrdf_load_html_response) 1975-01-13
JPS5536080B2 (enrdf_load_html_response) 1980-09-18
GB1368930A (en) 1974-10-02

Similar Documents

Publication Publication Date Title
US3869373A (en) Contact device for electrochemically deburring workpieces
US4420382A (en) Method for controlling end effect on anodes used for cathodic protection and other applications
US3300396A (en) Electroplating techniques and anode assemblies therefor
US3012958A (en) Vitreous lined water tanks with sacrificial anodes
US3243365A (en) Elecrode for electrolytic hole drilling
US4251706A (en) Electrode tool for EDM and method for utilizing such electrode tool
US3891531A (en) Electrolytic diaphragm cells including current connection means between the cell base and anode
US2478478A (en) Potential gradient anode for galvanic protection
JPH0641068B2 (ja) 放電加工装置用ワイヤ電極
US3928167A (en) Improvements in methods of producing electrolytic anode assemblies
US2758082A (en) Cathodic protection
US4677041A (en) Electrode assemblies for electrochemical cells
US4401540A (en) Apparatus for reducing end effect in anodes
US3001924A (en) Sacrificial magnesium anodes
US4160717A (en) Electric contact post for electrochemical machine
US3271288A (en) Electrolytic drilling and tapping apparatus
JPH09500757A (ja) 硬化させた鉛蓄電池用電極の製造方法
US5304288A (en) Method of and device for the spark erosion of hardmeal objects
US2783356A (en) Grid shielded electrode for electric boilers
US2772231A (en) Anodes for the protection of metal structures against corrosion
US3012959A (en) Device for holding magnesium or other galvanic anodes
US3674564A (en) Sea water battery with fiber-like metal cathode
US3322185A (en) Method of making electrical discharge machining electrodes
US3684680A (en) Electrodes for electrolytic or cathodic anticorrosion protection
US4456517A (en) Metal spring stub and ceramic body electrode assembly