Electric heating – Metal heating – Cutting or disintegrating
Patent
1980-01-03
1983-02-08
Paschall, M. H.
Electric heating
Metal heating
Cutting or disintegrating
219 69R, 219 68, 403119, 403220, 33318, 29 11, B23P 108
Patent
active
043731260
ABSTRACT:
An improved machining process using electro-erosion to form integral hinges in rods in making flexible and/or electric suspension blades for various industrial devices.
The machining process includes repeatedly eroding a rod alternately on two opposite sides to form two curved indentations, one on each side of the rod at a given point along its length, using a curved cylindrical electrode, so that the rod is progressively narrowed at this point until the required thickness of hinge is obtained. The process may also include, using as reference planes, to position the eroding electrode accurately, surfaces of a frame to which the rods have been attached. In this way, the rods are accurately prepositioned and thin hinges are produced with a repeatable high accuracy.
Products made by this process include a pendulum-type accelerometer and an elastic support for a gyroscope useful in aeronautical applications.
REFERENCES:
patent: 3723690 (1973-03-01), Nakada et al.
"IBM" Technical Disclosure, Electric Arc Stripping, vol. 12, #8, 1-1970.
Finommechanika-(Hungary) pp. 161-165, vol. 10, #6, 6-1971, "Micro-Electro-Spark Machining Part I".
Paschall M. H.
Sfena
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