SUBSTITUTION MATERIAL, DESIGN AND SURFACE TREATMENT OF TOOL DRILL Ø8.5 DSS-853 BY SHAFT OP- 25 MACHINING PROCESS

Abstract

This research was conducted after activities to increase lifetime and reduce Cost Per Piece of drills used for the shaft machining process. This tool experiment was carried out on the same machine with the same parameters. The study was conducted on the DSS-853 drill tool used to make Ø8.5 holes in the Shaft during the OP25 process with a Fanuc Robodrill machining center. From the drill, we conducted a study on the design side, where we got the initial conditions from the margin or guide guards concentricity, vibration dampers that make smoother results. This margin is moved to a smaller angle, so tool will be rigid when drilling process. Adding chamfer at the cutting edge where in this area occurred chipping, so chamfer can be reduce chipping. Changes also occur in the exit path of material / flute using the latest design technology, where the initial design of the flute is like a normal tool, or even, then made a parabolic flute. Next look at the material used, there is an increase in the grade from KH03 carbide material to DK460UF. Where Toughness was originally 3.3 GPa to 5.8 GPa. After that we additional process for surface treatment and it is done using Alcrona. This study shows that the design factor, the toughness of the materials and surface treatment, need to be considered because it greatly affects the performance of the drill.