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A single-point cutting tool with 12° rake angle is used to machine a steel work-piece. The depth of cut, i.e. uncut thickness is 0.81 mm. The chip thickness under orthogonal machining condition is 1.8 mm. The shear angle is approximately
[ME 2011]
  • a)
    22°
  • b)
    26°
  • c)
    56°
  • d)
    76°
Correct answer is option 'B'. Can you explain this answer?
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Relation between shear angle (ϕ), chip thickness ratio (r) and rake angle (α) is given by
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Relation between shear angle (ϕ), chip thickness ratio (r) and rake angle (α) is given by
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A single-point cutting tool with 12 refers to a cutting tool that has a single cutting edge or point and is designed for machining operations. The number 12 may refer to different aspects of the cutting tool, such as:

1. Number of cutting edges: A single-point cutting tool typically has only one cutting edge or point. However, some advanced cutting tools may have multiple edges or flutes, which can enhance cutting efficiency and tool life.

2. Tool geometry: The number 12 may refer to the specific geometry of the cutting tool, such as the included angle of the tool tip. Different angles are used for different machining operations and materials.

3. Tool size: The number 12 could also indicate the size or dimensions of the cutting tool. Cutting tools come in various sizes and shapes, and the number 12 could represent a specific size range.

Without further context or clarification, it is difficult to determine the exact meaning of a single-point cutting tool with 12.
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A single-point cutting tool with 12° rake angle is used to machine a steel work-piece. The depth of cut, i.e. uncut thickness is 0.81 mm. The chip thickness under orthogonal machining condition is 1.8 mm. The shear angle is approximately[ME 2011]a)22°b)26°c)56°d)76°Correct answer is option 'B'. Can you explain this answer?
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