Multiple choice

If each abrasive grain is viewed as a cutting tool, which of the following represents the cutting parameters in common grinding operations?

  1. Large negative rake angle, low shear angle and high cutting speed

  2. Large positive rake angle, low shear angle and high cutting speed

  3. Large negative rake angle, high shear angle and low cutting speed

  4. Zero rake angle, high shear angle and high cutting speed
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A Correct answer
Explanation

In common grinding operation, the average rake angle of the grains is highly negative, such as -$60^0$ or even lower and smaller the shear angle. From this,grinding chips under go much larger deformation than they do in other cutting process.The cutting speeds are high,typically 30 m/s

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