Explain the difference between orthogonal and oblique cutting. In an orthogonal cutting process the following observations were made:
Depth of cut = 0.25 mm
Chip thickness ratio = 0.45
Width of cut = 4 mm
Cutting velocity = 40 m/min
Cutting force component parallel to cutting velocity vector = 1150 N
Cutting force component normal to cutting velocity vector = 140 N
Rake angle of the tool = 18°
Determine resultant cutting force, power of cutting, shear plane angle friction angle and force component parallel to shear plane.