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If the abrasive grain is viewed as a cutting tool, then which of the following represents the cutting parameters in common grinding operations?
[PI 2005]
  • a)
    Large negative rake angle, low shear angle and high cutting speed
  • b)
    Large positive rake angle, low shear angle and high cutting speed
  • c)
    Large negative rake angle, high shear angle and low cutting speed
  • d)
    Zero negative rake angle, high shear angle and high cutting speed  
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
If the abrasive grain is viewed as a cutting tool, then which of the f...
Large negative rake angle =
α = (-40°)→  average value
hence low shear angle & higher cutting speed.
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Most Upvoted Answer
If the abrasive grain is viewed as a cutting tool, then which of the f...
Abrasive Grain as a Cutting Tool

When considering the abrasive grain as a cutting tool in grinding operations, it is important to understand the cutting parameters that are involved. These parameters determine the efficiency and effectiveness of the grinding process.

Cutting Parameters in Grinding Operations

The cutting parameters in grinding operations include the following:

1. Rake Angle: The rake angle refers to the angle between the abrasive grain's cutting edge and the workpiece surface. It affects the chip formation and cutting forces during grinding.

2. Shear Angle: The shear angle is the angle between the direction of the cutting force and the direction of the grain's motion. It determines the amount of material that is removed during grinding.

3. Cutting Speed: The cutting speed is the relative speed between the abrasive grain and the workpiece. It affects the material removal rate and the surface finish of the workpiece.

Optimal Cutting Parameters

Considering the cutting parameters mentioned above, the optimal combination for common grinding operations is as follows:

- Rake Angle: Large negative rake angle
- Shear Angle: Low shear angle
- Cutting Speed: High cutting speed

Explanation of the Correct Answer

The correct answer is option 'A' - Large negative rake angle, low shear angle, and high cutting speed. Here's an explanation of why this combination represents the cutting parameters in common grinding operations:

- Rake Angle: A large negative rake angle helps in reducing the cutting forces and improving the chip formation. It allows for efficient material removal and reduces the risk of workpiece burn and wheel loading.

- Shear Angle: A low shear angle minimizes the amount of material that is plowed instead of being cut. This reduces the grinding forces and improves the surface finish of the workpiece.

- Cutting Speed: A high cutting speed increases the material removal rate and reduces the grinding time. It also helps in preventing workpiece overheating and improves the overall efficiency of the grinding process.

Therefore, the combination of a large negative rake angle, low shear angle, and high cutting speed is considered optimal for common grinding operations.
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Community Answer
If the abrasive grain is viewed as a cutting tool, then which of the f...
Large negative rake angle =
α = (-40°)→  average value
hence low shear angle & higher cutting speed.
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If the abrasive grain is viewed as a cutting tool, then which of the following represents the cutting parameters in common grinding operations?[PI 2005]a)Large negative rake angle, low shear angle and high cutting speedb)Large positive rake angle, low shear angle and high cutting speedc)Large negative rake angle, high shear angle and low cutting speedd)Zero negative rake angle, high shear angle and high cutting speed Correct answer is option 'A'. Can you explain this answer?
Question Description
If the abrasive grain is viewed as a cutting tool, then which of the following represents the cutting parameters in common grinding operations?[PI 2005]a)Large negative rake angle, low shear angle and high cutting speedb)Large positive rake angle, low shear angle and high cutting speedc)Large negative rake angle, high shear angle and low cutting speedd)Zero negative rake angle, high shear angle and high cutting speed Correct answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about If the abrasive grain is viewed as a cutting tool, then which of the following represents the cutting parameters in common grinding operations?[PI 2005]a)Large negative rake angle, low shear angle and high cutting speedb)Large positive rake angle, low shear angle and high cutting speedc)Large negative rake angle, high shear angle and low cutting speedd)Zero negative rake angle, high shear angle and high cutting speed Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If the abrasive grain is viewed as a cutting tool, then which of the following represents the cutting parameters in common grinding operations?[PI 2005]a)Large negative rake angle, low shear angle and high cutting speedb)Large positive rake angle, low shear angle and high cutting speedc)Large negative rake angle, high shear angle and low cutting speedd)Zero negative rake angle, high shear angle and high cutting speed Correct answer is option 'A'. Can you explain this answer?.
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