Oblique versus orthogonal cutting: In the oblique cutting system, how does the cutting edge relate to the workpiece width?

Introduction / Context:
Chip formation analysis distinguishes orthogonal cutting (cutting edge perpendicular to cutting velocity direction) from oblique cutting (edge inclined). This geometric difference changes chip flow, force components, and the relationship between the cutting edge and workpiece width.

Given Data / Assumptions:

• Oblique cutting: cutting edge is at an inclination angle to the direction of tool travel.
• Orthogonal cutting: cutting edge spans and is perpendicular to the direction, clearing the full width.
• Typical turning or milling with inclined edge.

Concept / Approach:
In orthogonal cutting, the straight edge normally spans the entire width of cut. In oblique cutting, the cutting edge is set at an angle; the instantaneous contact may or may not cover the whole width, and chip flows sideways along the rake face. Therefore, it is not a requirement of oblique cutting that the edge always clears the full width.

Step-by-Step Solution:

Verification / Alternative check:
Textbook diagrams depict oblique cutting with a chip flow angle different from zero, demonstrating that contact distribution along the edge varies and full-width clearance is not guaranteed.

Why Other Options Are Wrong:
Options stating “must” or “may not” exclusively are too restrictive for oblique cutting; the geometry allows both possibilities depending on edge length, approach angle, and width of cut.

Common Pitfalls:
Assuming orthogonal cutting conditions apply to all cutting cases; many practical tools use oblique geometry to improve chip flow and surface finish.

Final Answer:
It may or may not clear the full width of the workpiece