Question 6: The average cutting forces for different feed rates in Ti6Al4V milling have been measured using table dynamometer (Table 1). During the cutting test a carbide cylindrical end mill with 4 flutes, 0 degree helix angle and 19.05 mm diameter has been used. All the cutting tests have been performed as full immersion (4-0 degree, x=180 degree) with 5.0 mm depth of cut. a) Find the average mechanistic milling cutting coefficients (KKKKKK) using experimental average cutting forces for Ti6Al4V workpiece material (Figure 2). (7 marks) Table 1. Average milling cutting forces Feed rate Ave. Fx Ave. Fy Ave. Fz Test No [mm/rev] Force [N] Force [N] Force [N] 1 0.050 -380.38 534.13 0.00 2 0.075 -430.21 751.72 0.00 3 0.100 -477.01 960.88 0.00 4 0.125 -552.60 1165.32 0.00 5 0.150 -605.37 1392.23 0.00