Step 1: Understand rake angle.
The rake angle in cutting tools is the angle formed between the cutting face of the tool and the workpiece surface. An optimum rake angle improves cutting efficiency by reducing cutting forces and tool wear.
Step 2: Effect of material properties.
The rake angle is generally optimized based on the material properties of the workpiece. Softer materials benefit from larger rake angles, while harder materials require smaller rake angles to avoid tool wear and breakage.