Machining, Measurement, and Control Laboratory

Tool path planning using trochoid cycles for hardened steel in die and mold manufacturing (2nd report)
-- Tool path planning to avoid an excessive tool load --

Iwao Yamaji (Kyoto University)
Soichi Ibaraki (Kyoto University)
Yoshiaki Kakino (Kyoto University)
Susumu Nishida (Graphic Products)

In the machining of hardened steel for die and mold manufacturing, contour parallel paths often cause an excessive tool load in a critical cutting region such as the region where a full immersion slotting is needed, a sharp corner, or a narrow slot. The insertion of trochoid cycles is effective to safely machine such a region. Two practical case studies of 2-1/2 dimensional machining of a cavity mold are presented to show the effectiveness of the proposed machining strategy using a straight end mill for higher productivity machining, compared to the conventional machining strategy using a ball end mill.

Key words: die and mold manufacturing, tool path planning, contour parallel path, trochoidal grooving, straight end mill, ball end mill.