1969•Journal of Japan Institute of Light MetalsOpen access

Studies on hole accuracy in drilling of aluminum its and alloys

Akiyasu Yuki, Yoshio Hasegawa

Abstract

The normal drill grinder with a stepped ground point drill having a chisel edge angle of 90° can drill smaller dimensions of oversize of holes than with the conventional chisel point drill.However, the optimum condition of drilling aluminum and its alloys by using the drill of the former type is still unknown. This paper discusses the effects of drilling conditions and the shapes of drill points on the dimensions of oversize of holes for materials of 5 kinds of F-metals; 1S, 2S, 17S, 52S, and 61S.The principal results obtained were as follows.(1) In dry drilling (with no cutting fluids), the dimensions of the oversize were arranged in ascending order of 17S<52S<61S

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Key concepts: Drilling, Chisel, Drill, Enhanced Data Rates for GSM Evolution, Point (geometry), Materials science, Aluminium, Metallurgy