Materials Science and Manufacturing Engineering Miscellaneous
- Increase in rake angle causes... (A)... in chip thickness and ...(B)... in shear angle
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Reduction in chip thickness and increase in shear angle. Because FT, thrust force is decreasing in nature.
Correct Option: A
Reduction in chip thickness and increase in shear angle. Because FT, thrust force is decreasing in nature.
- The base of a brass bracket has to be rough ground to remove the unevenness. The 4 wheels available in the store. The appropriate wheel is
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Correct Option: A
- The base of a brass bracket has to be rough ground to remove the unevenness. The 4 wheels available in the store. The appropriate wheel is
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Correct Option: A
- A milling cutter having 8 teeth is rotating at 100 rpm. The workpiece feed is set at 40 mm/ min the feed per tooth is
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Z = teeth table feed = 40 mm/ min , N = 100 rpm
ft = F = 40 = 0.05 mm ZN 8 × 100 Correct Option: C
Z = teeth table feed = 40 mm/ min , N = 100 rpm
ft = F = 40 = 0.05 mm ZN 8 × 100
- The diameter and rotational speed of a job are 100 m and 500 rpm respectively. The high spots (chatter marks) are found at a spacing of 30 deg on the job surface. The chatter frequency is
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Chatter in every 30°.
So 12 chatter mark in one revolution.→ 500 rpm = 500 = 8.33 rps 60
⇒ Frequency = 12 × 8.33 = 100 Hz (cycle/sec)
⇒ Frequency = 12 × 8.33 = 100 Hz (cycle/sec)Correct Option: C
Chatter in every 30°.
So 12 chatter mark in one revolution.→ 500 rpm = 500 = 8.33 rps 60
⇒ Frequency = 12 × 8.33 = 100 Hz (cycle/sec)
⇒ Frequency = 12 × 8.33 = 100 Hz (cycle/sec)