Electric heating – Metal heating – Cutting or disintegrating
Patent
1987-12-28
1989-06-20
Pellinen, A. D.
Electric heating
Metal heating
Cutting or disintegrating
204297R, 219 6917, B23H 100, B23H 1100
Patent
active
048411264
ABSTRACT:
A method and apparatus control relative movement between an electrode of an DM machine and a workpiece. The method provides for positioning each point of a path of relative movement between the electrode and the workpiece by the distance of the point from an axis of rotation, rotating the workpiece, positioning the point also by an angle through which the workpiece is rotated, memorizing the position of each point of the path, and repeating the steps of positioning the points. The apparatus includes a rotatable work table driven by a servo motor and encoder to rotate the table to a desired angle. A device for polarizing the workpiece is provided to avoid interference with the rotation of the table on which the workpiece is mounted. The apparatus further includes machinery for translating the work table or the electrode along an axis that intersects the axis of rotation for the table. Splash guards are provided for protecting the motor and encoder, the work table and the connections between them from the splashing of a liquid dielectric used in the electro-eroding process.
REFERENCES:
patent: 3049032 (1962-08-01), Schabot
patent: 3272732 (1966-09-01), Faulkner
patent: 3461059 (1969-08-01), Krueger
patent: 3610864 (1971-10-01), Kholodnov
patent: 3664947 (1972-05-01), Bass
patent: 3731044 (1973-05-01), Ullmann et al.
patent: 3975608 (1976-08-01), Ullmann et al.
patent: 4029929 (1977-06-01), Rietveld
Evans Geoffrey S.
McWilliams Machinery Sales, Division of Bridgeport Machines Inc.
Pellinen A. D.
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