US3043766A - Electrolytic grinding apparatus - Google Patents

Electrolytic grinding apparatus Download PDF

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Publication number
US3043766A
US3043766A US839688A US83968859A US3043766A US 3043766 A US3043766 A US 3043766A US 839688 A US839688 A US 839688A US 83968859 A US83968859 A US 83968859A US 3043766 A US3043766 A US 3043766A
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US
United States
Prior art keywords
wheel
work
grinding
face
workpiece
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
US839688A
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English (en)
Inventor
Lynn A Williams
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.)
Anocut Engineering Co
Original Assignee
Anocut Engineering 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
Priority to NL255620D priority Critical patent/NL255620A/xx
Application filed by Anocut Engineering Co filed Critical Anocut Engineering Co
Priority to US839688A priority patent/US3043766A/en
Priority to GB28965/60A priority patent/GB892999A/en
Priority to FR838016A priority patent/FR1270164A/fr
Priority to BE594962A priority patent/BE594962A/fr
Priority to CH1035960A priority patent/CH400404A/de
Application granted granted Critical
Publication of US3043766A publication Critical patent/US3043766A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B23H5/00—Combined machining
    • B23H5/06—Electrochemical machining combined with mechanical working, e.g. grinding or honing
    • B23H5/08—Electrolytic grinding

Definitions

  • One ofthe objects of this invention is .to provide a novel mechanism and method for speeding the removal of material from a workpiece having a flat surface formed thereon by electrolytic grinding.
  • An additional object is to provide an arrangement and a method by the use of which a workpiece is traversed across the face of the grinding wheel in such fashion that the area of contact between the workpiece and the grinding wheel is at a substantial maximum.
  • Yet another object is to provide a novel apparatus and method for electrolytic grinding in which a workpiece is traversed across the face of a grinding wheel so as to form a flat surface upon the workpiece, and in which high current densities together with a high work removal rate are accomplished at minimum voltages.
  • FIG. 1 is a diagrammatic end elevation of apparatus incorporating the features of the present invention
  • FIG. 2 is a diagrammatic illustration of a fraction of the grinding wheel face showing the workpiece moving thereacross principally for the purpose of illustrating the portion thereof in contact with the grinding wheel in a typical application of the invention.
  • FIG. 3 m-ay be considered as a vertical sectional view taken in the direction indicated by the arrows substantially along the line 3-3 of FIG. 2.
  • this invention permits far greater area engagement between the wheel and the workpiece than is possi-ble with conventional pass grinding, without appreci-ably increasing the 'wheel size and without increasing the amount wheel bites into the workpiece at each pass.
  • FIG. l I have diagrammatically indicated a meta-l bonded grinding wheel at 10 mounted upon a spindle 12 which is jour-nailed within a housing 14.
  • the housing is attached to a bracket 16 which supports an electric motor 18 and in turn is attached to the frame 20 of the grinding machine.
  • An insulating pad 21 between the housing 14 and bracket 16 permits these elements to be at different electrical potential.
  • the spindle 12 and wheel 10 are dri-ven from the motor 18 through one or more belts 22.
  • the negative low potential direct current electrolyzing lead 24 is connected to brushes 26 which engage a slipring 28 mounted upon the spindle 12.
  • the grinding wheel is therefore at the negative electrolyzing potential, whereas, the motor 18 and machine frame may be at ground potential.
  • the work W is held in the present instance upon a magnetic chuck 3i) which is connected to ground and to the positive electrolyzing lead 32.
  • the chuck 30 is in turn secured to a table 34 which moves longitudinally of the machine bed 36 upon ways 38.
  • suitable mechanism usually hydraulic, traverses the table 34 back and forth at a selected speed and through a stroke of desired length. Furthermore, mechanism is also provided to index the bed 36 upwardly toward Vthe wheel an appropriate amount between strokes of the table 34.
  • the grinding wheel l@ performs its work upon its outward face i6-which, reference to FfGS. l and 3 will show, is not an annular flat surface, but rather is a frustum of a very obtuse cone. For the purpose of illustration the angularity of this surface has been shown considerably exaggerated.
  • the working face is a surface of revolution which is at an angle of about two degrees with respect to a plane surface normal to the axis of the spindle 12. This surface is convex in that the portion toward the center of the wheel is slightly farther outward than the periphery.
  • This wheel will normally be mounted in a slightly inclined position so that its axis is tilted with respect to the vertical by an amount equal to the angularity of the wheel face. In theA present example, the amount of tilt is thus about two degrees.
  • a radial line acrossthe wheel face at one position which is horizontal, and it is at this position that the spacing between the wheel face and the top of the chuck is at a minimum. This position is indicated in FIGS. 2 and 3 by the line S0.
  • the set-up is so organized that this line 50 lies above the chuck and extends vat right angles to its direction of movement along the ways 38. The position of this line, it will be appreciated, determines the plane of the ground face upon the workpiece at the conclusion of each pass of the table 34.
  • the face i of the wheel recedes from this plane very gradually so that even with a small wheel, when the work is advanced by the ktable 34 in such a position of the bed 36 as to remove an appropriately thin layer of metal, the work 'will engage the wheel face very gradually, and ultimately-when the work leading edge reaches the radial center line StL-over an extremely large surface area.
  • the electrolytic action (the electrolyte is shown as being supplied ⁇ through a line 51 so as to ow over the wheel face) therefore takes place over a large area of the workpiece surface which, as previously explained, is highly desirable.
  • FIGS. 2 and 3 illustrate the engagement between the wheel and the workpiece under what may be considered as typical conditions, although, in the interest of clarity of illustration, the angularity of the wheel face, and hence the thickness of the metal removed,.have been exaggerated.
  • the area of contact between the Work and the wheel where electrolytic Vaction takes place is indicated as lying between the broken lines S and 52 and having a .width equivalent to the width of the workpiece. As the work approaches the wheel from the left, it is clear of contact until it reaches the point 54. There is, therefore, no danger of jamming. With slight additional advancement (to the point 56), full contact across the workpiece is established and this engagement remains in eiect until the work passes off the wheel face at the center line 50.
  • An electrolytic grinding device comprising an electrically conductive wheel body having abrasive particles forming a grinding face upon an annular surface thereof,
  • said annular surface being slightly convex and having the form of a frustum of an obtuse cone with the frustoconical surface having an angularity of substantially two degrees with respect to the surface which is normal to fthe axis of the wheel, means for rotating said wheel about its axis, a work holder, a slide for carrying said work holder, means for -guiding said slide for movement in a direction normal tothe axis of rotation of said wheel so as to carry work held in said work holder across the grinding face in a direction substantially normal to the radius of said face which is most Ldeeply advanced into the work as said work passes said wheel, means for supplying electrolyte to the interface between the wheel and the work, and means connecting the wheel and the work in an electrolyzing circuit such that the wheel is a cathode.
  • An electrolytic grinding device comprising an electrically conductive Wheel body having abrasive particles forming a grinding face upon an annular surface thereof, said annular surface being slightly convex and having the form of a frustum of an obtuse cone with the frustoconical surface having a slight angularity with respect to a surface which is normal to thel axis of the wheel, means for rotating said wheel about its axis, a work holder, a slide for carrying said work holder, means for guiding saidl slide for movement in a direction normal to the axis of rotation of said Wheel so as to carry work held in said work holder across the grinding face in a direction substantially normal to the radius of said face which is lmost deeply advanced into the work as said work passes said wheel, the slight angularity of said wheel face being sufficiently great to permit the work safely to clear the periphery of the wheel as the work is advanced toward the wheel but not substantially greater, means for supplying electrolyte to the interface between the wheel and the work, and means

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
US839688A 1959-09-14 1959-09-14 Electrolytic grinding apparatus Expired - Lifetime US3043766A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL255620D NL255620A (en, 2012) 1959-09-14
US839688A US3043766A (en) 1959-09-14 1959-09-14 Electrolytic grinding apparatus
GB28965/60A GB892999A (en) 1959-09-14 1960-08-22 Electrolytic grinding
FR838016A FR1270164A (fr) 1959-09-14 1960-09-07 Rectification électrolytique
BE594962A BE594962A (fr) 1959-09-14 1960-09-12 Rectification électrolytique
CH1035960A CH400404A (de) 1959-09-14 1960-09-13 Schleifmaschine zum elektrolytischen Schleifen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US839688A US3043766A (en) 1959-09-14 1959-09-14 Electrolytic grinding apparatus

Publications (1)

Publication Number Publication Date
US3043766A true US3043766A (en) 1962-07-10

Family

ID=25280397

Family Applications (1)

Application Number Title Priority Date Filing Date
US839688A Expired - Lifetime US3043766A (en) 1959-09-14 1959-09-14 Electrolytic grinding apparatus

Country Status (5)

Country Link
US (1) US3043766A (en, 2012)
BE (1) BE594962A (en, 2012)
CH (1) CH400404A (en, 2012)
GB (1) GB892999A (en, 2012)
NL (1) NL255620A (en, 2012)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223610A (en) * 1962-09-21 1965-12-14 Inoue Kiyoshi Apparatus for machining horizontal work surfaces
US3287245A (en) * 1961-06-19 1966-11-22 Anocut Eng Co Method and apparatus for use in electrolytic machining
US3324021A (en) * 1962-10-23 1967-06-06 Cincinnati Milling Machine Co Electrochemical machining apparatus and tool therefor
US3944475A (en) * 1973-01-26 1976-03-16 Hitachi Seiko Ltd. Electrolytic grinding method
US5119595A (en) * 1989-07-10 1992-06-09 Olympus Optical Company Limited Lens grinding apparatus
US20060249398A1 (en) * 2005-05-06 2006-11-09 Becker Manfred G Electrolytic microfinishing of metallic workpieces

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002188646A (ja) * 2000-12-20 2002-07-05 Nsk Ltd 転がり軸受及び軸受装置
CN111843077A (zh) * 2020-06-15 2020-10-30 天水师范学院 一种新型的磁力电解复合抛光头

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US774612A (en) * 1904-06-07 1904-11-08 Ernest Stead Grinding-machine.
US1328242A (en) * 1915-09-11 1920-01-13 Henry G Farley Machine for grinding the edges of glass plates
US2097806A (en) * 1936-11-23 1937-11-02 Weidrich Orrin Surfacing device
US2547057A (en) * 1948-04-06 1951-04-03 Thompson Prod Inc Polishing machine for impeller wheels
US2905605A (en) * 1953-05-19 1959-09-22 Keeleric Dressing of abrasive tools

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US774612A (en) * 1904-06-07 1904-11-08 Ernest Stead Grinding-machine.
US1328242A (en) * 1915-09-11 1920-01-13 Henry G Farley Machine for grinding the edges of glass plates
US2097806A (en) * 1936-11-23 1937-11-02 Weidrich Orrin Surfacing device
US2547057A (en) * 1948-04-06 1951-04-03 Thompson Prod Inc Polishing machine for impeller wheels
US2905605A (en) * 1953-05-19 1959-09-22 Keeleric Dressing of abrasive tools

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287245A (en) * 1961-06-19 1966-11-22 Anocut Eng Co Method and apparatus for use in electrolytic machining
US3223610A (en) * 1962-09-21 1965-12-14 Inoue Kiyoshi Apparatus for machining horizontal work surfaces
US3324021A (en) * 1962-10-23 1967-06-06 Cincinnati Milling Machine Co Electrochemical machining apparatus and tool therefor
US3944475A (en) * 1973-01-26 1976-03-16 Hitachi Seiko Ltd. Electrolytic grinding method
US5119595A (en) * 1989-07-10 1992-06-09 Olympus Optical Company Limited Lens grinding apparatus
US20060249398A1 (en) * 2005-05-06 2006-11-09 Becker Manfred G Electrolytic microfinishing of metallic workpieces
US8070933B2 (en) 2005-05-06 2011-12-06 Thielenhaus Microfinishing Corp. Electrolytic microfinishing of metallic workpieces

Also Published As

Publication number Publication date
CH400404A (de) 1965-10-15
GB892999A (en) 1962-04-04
BE594962A (fr) 1961-05-15
NL255620A (en, 2012)

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