EDM Method and apparatus with the controlled supply of a liquid

Details EDM Method and apparatus with the controlled supply of a liquid EDM Method and apparatus with the controlled supply of a liquid

1981-04-14

1983-10-11

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69M, 219 69V, 2041296, 2041297, B23P 108

Patent

active

044094582

ABSTRACT:
An machining method and apparatus whereby the EDM efficiency is markedly enhanced by replenishing the liquid machining medium in the machining gap at an amount of 400 to 3000 cc per unit weight by gram of the stock removal from the workpiece. The machining liquid is supplied into the gap under an elevated pressure of at least 10 kg/cm.sup.2, preferably between 30 and 100 kg/cm.sup.2. The rate of flow of the liquid medium to the gap is controlled in conjunction with and/or in response to at least one of the preset or variable parameters of the electrical discharges and/or as a function of other machining parameters such as the depth of the machining cavity so as to maintain the indicated amount of liquid replenishment.

REFERENCES:
patent: 3699303 (1972-10-01), Kauffman et al.
patent: 3975607 (1976-08-01), Ullmann et al.
patent: 4205213 (1980-05-01), Inoue
patent: 4208256 (1980-06-01), Inoue

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