Electric heating – Metal heating – Cutting or disintegrating
Patent
1986-05-19
1987-10-27
Paschall, M. H.
Electric heating
Metal heating
Cutting or disintegrating
219691, B23H 100, B23H 726
Patent
active
047031450
ABSTRACT:
Apparatus for manufacturing a master rack which in turn is employed in the manufacturing of forging dies to form nonuniform tooth configuartion, which includes an EDM machine having upper and lower platens and mechanism for raising and lowering the upper platen, rack blank support mechanism arranged for longitudinal movement in the rack blank axis and mounted on the lower platen, an electrode in the form of a facsimile of a helical pinion rotatably mounted in bracket attached to the upper platen, mechanism for rotating the electrode intermittently, mechanism causing axial movement of the rack blank past the electrode in accordance with the rotational movement of the electrode, a cam coordinating the position of the electrode in relation to the axis of the rack blank, and a cam follower attached to the bracket and contacting the last-named cam.
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patent: 4247748 (1981-01-01), Sato et al.
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Bishop Arthur E.
Roeske Klaus J.
Bishop Arthur E.
Evans Geoffrey S.
Paschall M. H.
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