More Questions from Production Engineering

Oblique cutting and surface generation Consider oblique cutting (tool cutting edge inclined to the direction of cutting). Is it true that the tool may or may not generate a surface parallel to the tool face, depending on the inclination and geometry?

Mechanical Engineering Production Engineering Difficulty: Easy
Choose an option
  • A
    Yes
  • B
    No
  • C
    Only at zero inclination angle
  • D
    Only for negative rake tools
  • E
    Only for turning, not for milling

Answer

Correct Answer: Yes

Explanation

Introduction / Context:Machining can be analyzed as orthogonal or oblique cutting. In oblique cutting, the cutting edge is inclined, altering chip flow direction and the kinematics of the generated surface.

Given Data / Assumptions:

  • Tool has nonzero inclination angle (lambda) with respect to cutting velocity.
  • Work material and feeds are typical; no special chip-control grooves considered.
  • Surface generation depends on effective rake and edge orientation.

Concept / Approach:Unlike orthogonal cutting where the cutting edge is perpendicular to the cutting direction, oblique cutting deflects chip flow sideways. The geometry can yield a generated surface that is not strictly parallel to the tool face; it depends on rake, inclination, and approach angles. Thus, it is correct to say the tool may or may not generate a surface parallel to the face.

Step-by-Step Solution:

Recognize oblique cutting involves a nonzero inclination angle.Acknowledge that chip flow angle and surface texture orientation change with geometry.Conclude that surface parallelism with the tool face is not guaranteed.

Verification / Alternative check:Machining theory shows the chip flow angle eta and the normal rake governing chip direction; graphical kinematics confirm nonparallel outcomes are common in oblique cutting.

Why Other Options Are Wrong:“No”: contradicts geometric reality of oblique cutting.Material-specific or rake-specific qualifiers are unnecessary; geometry alone dictates the relationship.

Common Pitfalls:Assuming orthogonal cutting relations apply directly to oblique cutting; overlooking the role of inclination angle in surface generation and chip disposal.

Final Answer:

Yes

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