Correct option is B
In machining, the angles of a cutting tool play a crucial role in determining its effectiveness in material removal. The three main angles involved are:
1. Clearance Angle:
· The clearance angle is the angle between the tool's flank and the surface of the workpiece. It ensures that the tool's flank does not rub against the workpiece, reducing friction and preventing damage to the tool and workpiece.
2.Rake Angle:
· The rake angle is the angle between the tool's rake face and a reference plane perpendicular to the cutting direction. This angle affects how the material flows away from the cutting edge (chip formation) and influences the cutting forces.
3.Cutting Wedge Angle:
· The cutting wedge angle is the angle formed at the cutting edge by the intersection of the rake face and the flank face. This angle represents the sharpness of the tool and is critical for understanding the tool's cutting ability and durability.
The sum of the clearance angle, rake angle, and cutting wedge angle is a fixed geometric relationship in orthogonal cutting tool geometry. Specifically:
Clearance Angle + Rake Angle + Cutting Wedge Angle = 90∘
