International Science and Technology Journal

Cutting tool material, Cutting parameters, cutting tool geometry and workpiece material all play a role in producing the desired product quality at an acceptable cost. The focus of this experimental study is to optimize the cutting parameters using two cutting tools made from medium carbon steel C45. We chose C45 because it is an available and cheap material and we can raise its hardness by heat treatment. In this study, we used heat treatment to get the desirable hardness, and then many operations were conducted on the tools like milling, wire cutting etc. to make cutting tool geometries. The experiments were conducted at the Center for Research and Technical Studies, Mechanical Technology Branch, Tripoli, as well as at the Research and Development Center, Tripoli. In this study, the workpiece was aluminium alloy 2024, and external turning tests were performed. All of the turning tests were performed under cooling conditions on the CNC lathe machine SCHAUBLIN 180-CNC TM A2-6 “TEACH IN"PRECISION LATHE WITH FANUK 18i numerical control. In the study, three parameters have been investigated. These parameters are cutting speed, depth of cut, and feed rate. The Cutting speed for turning operation was (500 rpm, 700 rpm, 900 rpm ), feed rate (0.2 mm/rev, 0.25 mm/rev, 0.3 mm/rev) and depth of cut(0.5 mm, 1.0 mm, 1.5 mm). The Taguchi design method was used, which included three levels of cutting speed, three levels of feed, and three levels of depth of cut. The standard orthogonal matrix (L9) has been selected to perform the matrix. Nine experiments were performed each experiment producing a test part which was tested for average surface roughness ( ) and S/N Ratios were calculated. Keywords:Machining parameters, cutting tool, Medium carbon steel C45, Aluminium alloy 2024, Surface roughness