US3730870A - Tool for electrolytically honing spherical surfaces - Google Patents

Tool for electrolytically honing spherical surfaces Download PDF

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Publication number
US3730870A
US3730870A US00157980A US3730870DA US3730870A US 3730870 A US3730870 A US 3730870A US 00157980 A US00157980 A US 00157980A US 3730870D A US3730870D A US 3730870DA US 3730870 A US3730870 A US 3730870A
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US
United States
Prior art keywords
tool
honing
spherical
face
spherical surfaces
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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
US00157980A
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English (en)
Inventor
A Grosseau
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.)
Automobiles Citroen SA
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Automobiles Citroen SA
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 Automobiles Citroen SA filed Critical Automobiles Citroen SA
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Publication of US3730870A publication Critical patent/US3730870A/en
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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

Definitions

  • a tool for honing spherical surfaces by electrolytic action includes a concave spherical surface connected as one electrode whilst the spherical surface to be honed is connected as the other electrode.
  • the spherical surface of the tool is encircled by a ring member faced with an abrasive surface and the latter lies within the imaginary surface of the sphere.
  • a sensing nozzle is disposed on the common axis of the tool and spherical surface of the workpiece.
  • An object of the present invention is to provide an improved tool for honing spherical surfaces electrochemically.
  • a tool for the electro-chemical honing of spherical surfaces means defining a part-spherical face forming an electrode, means defining an abrasive ring having a working surface adjacent the edge of the part-spherical face,
  • a sensing blower nozzle which lies in the longitudinal centre line of the tool and is arranged to be connected to a measuring device.
  • both it and the spherical face that is to be honed are rotated and the abrasive surface is brought into contact with the latter.
  • the purpose of the abrasive surface is threefold: it plays a part in the honing by forming a stop for the face of the workpiece; it determines the spacing between the latter and the spherical face of the tool, these constituting the two electrodes; and finally it provides a reference point or surface for gauging purposes.
  • FIG. 1 is a longitudinal section of the tool
  • FIG. 2 is an end elevation.
  • the embodiment of the tool is intended for honing a workpiece 1 having an at least part-spherical surface.
  • This tool comprises a body 2, the forward end of which terminates in a concave part-spherical face 2a, having substantially the same radius as the spherical convex surface to be honed.
  • a diamond-faced ring 3, with crenellations 3a, is mounted on the forward end of the tool, a ring of insulating material being interposed at 4, and is held in place by electrically insulated screws 5.
  • the diamondfaced part of the ring 2 lies inside the imaginary sphere defined partly by the face 2a, thereby maintaining between the latter and the face 1 a gap sufiicient to allow electrochemical honing to take place.
  • This diamond-faced part of the ring may be, for example, frusto-conical in shape.
  • the space 6 is substantially of uniform thickness and varies little as honing proceeds.
  • a blower nozzle 8 Fixed in the body 2 is a blower nozzle 8, in communication with an axial passage 9.
  • This body 2 also contains one or more passages 10, opening into the spherical face 2a, their purpose being to admit electrolyte to the gap 6, as well as passages at 11 for the escape of the air blown in.
  • the body 1 carries two rotating connectors, 12 and 13, with which the axial passage 9 and the passage or passages 10 can communicate respectively with a compressed-air feed pipe 14, fitted with a flow regulator, and an electrolyte feed pipe 15.
  • the body 2 and the spherical face are connected respectively to the cathode and anode of an electricity supply.
  • the face 1 of the workpiece is rotated by a headstock drive (not shown), the axis of rotation 16 of which is inclined in relation to the axis of rotation 17 of the tool.
  • the tool itself is loosely or rigidly mounted on a rotating spindle (likewise not shown) and is brought to bear on the face 1 by movement along the axis 17.
  • the nozzle 8 approaches the face 1, so that the back-pressure rises in the pipe 14; when honing is complete, the hone having reached its reference position, the pressure in the pipe reaches a predetermined value, by virtue of which it operates a pneumatic control (not shown), causing the spindle that carries the tool to withdraw.
  • the spherical surface obtained when honing is completed, is thus determined by the relative positions of the nozzle 8 and the abrasive surface 3.
  • a sensing blower nozzle which lies in the longitudinal centre line of the tool and is arranged to be connected to a measuring device.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
US00157980A 1970-07-03 1971-06-29 Tool for electrolytically honing spherical surfaces Expired - Lifetime US3730870A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7024678A FR2109049A5 (https=) 1970-07-03 1970-07-03

Publications (1)

Publication Number Publication Date
US3730870A true US3730870A (en) 1973-05-01

Family

ID=9058208

Family Applications (1)

Application Number Title Priority Date Filing Date
US00157980A Expired - Lifetime US3730870A (en) 1970-07-03 1971-06-29 Tool for electrolytically honing spherical surfaces

Country Status (3)

Country Link
US (1) US3730870A (https=)
FR (1) FR2109049A5 (https=)
GB (1) GB1334748A (https=)

Also Published As

Publication number Publication date
GB1334748A (en) 1973-10-24
DE2130776B2 (de) 1975-06-19
FR2109049A5 (https=) 1972-05-26
DE2130776A1 (de) 1972-04-06

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