高速放電加工の研究
高周波発電機による実験
1968 年 1 巻 2 号 p. 51-70
詳細
1968 年 1 巻 2 号 p. 51-70
A high frequency power generator was used in these experiment, and it was confirmed that even when the repetition of discharges is comparatively quicker (3500 time/s approx.), the discharge machining phenomena can be analogized from a single electric discharge.
Then, a discharge machining circuit of the voltage doubling system was manufactured for trial, and with a small power (5kVA), a comparatively large removal rate (W=14g/min and Hmax=75-80μ) and a satisfactory electrode wear ratio of unprecedented 0.1-1.0% were obtained.
By using this discharge machining circuit, it has become possible to use with good results the material of the aluminum group, which were previously considered unfit for the tool electrode in spite of their excellent malleability workability, structural strength and cconomy.
The electrode wear ratio factor by drilling electrode also has been improved by about 70-80%.
Further, favourable conditions for the stability of electric discharge are found by studying the phenomena of the stability of electric discharge from the phenomena of turbidity of the working fluid for discharge machining and by investigating effect of metal grains, etc.
In that working fluid, and thus discharge machining has become possible under conditions where it was previously thought difficult to conduct discharge machining.
