Accession Number:

AD0659004

Title:

INCREASING ELECTROCHEMICAL MACHINING RATES

Descriptive Note:

Final rept.

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE

Report Date:

1967-01-16

Pagination or Media Count:

124.0

Abstract:

Phenomena which may limit the rate of Electro-Chemical-Machining ECM are postulated, and indirectly studied by attempting their elimination. Of the mechanisms studied, three appear most promising 1 Elevated electrolyte pressure in the ECM zone reduces boiling, cavitation, and formation of hydrogen bubbles. As a result, drilling rates of 1.5 inmin have been attained at current densities up to 19,700 ampssq in. This can be compared with a typical maximum rate of 14 inmin. 2 The use of fused salt electrolytes such as NaOH appears quite promising for difficult-to-ECM materials such as tungsten-carbide. 3 Pulsed Dc current with short reverse spikes appears promising for materials such as tungsten-carbide which normally form relatively impervious reaction layers.

Subject Categories:

  • Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE