Kobe Steel, Ltd.

Tomoya Yonetsu

Toshiyuki Miyatake

A method for forming drilled cast which includes drilling with a drill so as to provide communication with a cast hole includes a casting step and a drilling step. The casting step is to cast a cast having a cast hole which includes a flat inner wall surface in which width of a position to be drilled with the drill is obtained by adding first length Hserving as a manufacturing error range of the cast to a diameter D of the drill, which is a second length H. The drilling step is to form a through hole providing communication between an interior of the cast hole and an exterior of the cast through the flat inner wall surface with the drill.

Growing community of inventors

Hyogo, Japan

Tomoya Yonetsu