AN EXPERIMENTAL STUDY ON TOOL WEAR RATE AND CHIP FORMATION DURING DRILLING PROCESS OF MILD STEEL PLATE

Drilling is probably the most common machining operation applied to mild steel and other composite materials, since components such as steel are made out of mild steel are usually near net shaped and require only holes for assembly integration. In this investigation, experiments were conducted by varying the drilling parameters and determining the optimum cutting conditions for drilling of mild steel using Genetic Algorithm (GA) optimization technique. Tool wear study was performed by drilling 100 holes each with 118° and 130° point angle drills. Less progressive tool wear and better chip evacuation was achievable in 130° point angle drills when compared with 118°point angle drills.