Which angle is formed by the surface of the workpiece and the bottom end of the cutting tool?

Which angle is formed by the surface of the workpiece and the bottom end of the cutting tool?

• A. Rake Angle
• B. Relief Angle
• C. Shear Angle
• D. Inclination Angle

Answer: (B)

The angle formed by the surface of the workpiece and the bottom end of the cutting tool is referred to as the relief angle. This angle is crucial in machining because it allows the cutting tool to clear the surface of the workpiece, preventing the tool from rubbing against the material as it cuts. If the relief angle is too small, it can lead to excessive wear on the tool and poor surface finish on the workpiece. Understanding this angle helps in optimizing the cutting process, as it significantly influences the effectiveness of the tool’s cutting action and its longevity. In contrast, other angles such as the rake angle, shear angle, and inclination angle refer to different relationships and geometries that also affect cutting performance but do not specifically describe the interaction between the workpiece surface and the bottom of the cutting tool in the same way.

The angle formed by the surface of the workpiece and the bottom end of the cutting tool is referred to as the relief angle. This angle is crucial in machining because it allows the cutting tool to clear the surface of the workpiece, preventing the tool from rubbing against the material as it cuts. If the relief angle is too small, it can lead to excessive wear on the tool and poor surface finish on the workpiece.

Understanding this angle helps in optimizing the cutting process, as it significantly influences the effectiveness of the tool’s cutting action and its longevity. In contrast, other angles such as the rake angle, shear angle, and inclination angle refer to different relationships and geometries that also affect cutting performance but do not specifically describe the interaction between the workpiece surface and the bottom of the cutting tool in the same way.