EFFECT OF RAKE ANGLE IN THE TURNING PROCESS ON THE SURFACE ROUGHNEES OF WORKPIECE AISI 4340 STEEL

Sobron Lubis, Rosehan, Denny Handoko

Department of Mechanical Engineering,

Faculty of Engineering,

Universitas Tarumanagara, Jakarta - Indonesia
E-mail: Sobron_lbs@yahoo.com

Abstract

In the metal cutting process, the products are of good quality is to be achieved. Quality product is obtained when the shape and surface conditions are achieved in accordance with the designed. One of the factors that determine the achievement of the quality of the product is generated surface roughness. If roughness a surface increasingly subtle then it surface workpiece who generated increasingly well. Surface quality of the workpiece machining process results influenced by many things such as material hardness, product geometry, tool wear, coolant, and also the ability of the machine do the work. In the process of turning, the workpiece surface roughness occurs because of the friction between the the cutting tool and the workpiece. This study was conducted to analyze the influence of rake angle cutting tool on the surface roughness of the workpiece. This experiment using a CNC lathe and workpiece is AISI 4340. The machining process using ceramic cutting tools with various rake angle (-3^o, -6^o, 0^o, 3^o, 6^o). The results obtained that the increase in rake angle give the effect on the value of the surface roughness of the workpiece . Improved machining time give the effect on the surface roughness of the workpiece.

Keywords: Rake angle, cutting tools, surface roughness