ABSTRACT
The effects of rake angle and feed rate on the cutting forces in an orthogonal turning process have been studied. A cylindrical mild carbon steel, CS1030 work piece was turned using tools of grades TP20 carbide flat-top inserts and 8 TiN coating on a CNC lathe for 3 different rake angles (-50, 00, 50). A total of 12 experiments were carried out with 4 different feed rates (0.1, 0.17, 0.24, 0.31 mm/rev) for each rake angle, keeping the cutting speed (200 m/min.) and depth of cut (2.5 mm) constant. During the experimentation, the forces were measured using a 3-component piezoelectric dynamometer. The experimental results show that the feed force ( ) is greater than the tangential force ( ) and the longitudinal force ( ) is least in magnitude irrespective of the tool rake angle. The cutting forces were found to increase with the increase in feed rate and decrease with the increase in rake angle.
