BITS Pilani Mechanical Engineering Workshop Practice Lecture 9

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What is the primary difference between orthogonal and oblique cutting?

Workpiece material

Motion of workpiece

Type of tool material

Cutting edge angle (correct)

What percentage of heat is distributed to the workpiece during machining?

20%

10% (correct)

30%

80%

Which of the following factors does not influence tool life?

Machine tool geometry (correct)

Cutting conditions

Workpiece material

Tool material

What is the primary function of the chip in metal cutting?

To remove the material from the workpiece Signup and view all the answers

What type of tool has a single cutting edge?

Single Point tool Signup and view all the answers

What is the relationship between cutting speed and tool life according to Taylor's expression?

Inversely proportional Signup and view all the answers

What is the effect of reducing the cutting speed by 50% on the tool life, given n = 0.5 and C = 400?

Tool life increases by 300% Signup and view all the answers

What is the value of n in the modified Taylor's equation, given that θ1 > θ2 > θ3?

n cannot be determined from the given information Signup and view all the answers

If the useful tool life of a HSS tool machining mild steel at 18 m/min is 3 hours, what is the tool life when the tool operates at 24 m/min, assuming n = 0.125?

1.5 hours Signup and view all the answers

What is the unit of the constant C in Taylor's expression?

Dimensionless Signup and view all the answers

BITS Pilani Mechanical Engineering Workshop Practice Lecture 9

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Questions and Answers

What is the primary difference between orthogonal and oblique cutting?

What percentage of heat is distributed to the workpiece during machining?

Which of the following factors does not influence tool life?

What is the primary function of the chip in metal cutting?

What type of tool has a single cutting edge?

What is the relationship between cutting speed and tool life according to Taylor's expression?

What is the effect of reducing the cutting speed by 50% on the tool life, given n = 0.5 and C = 400?

What is the value of n in the modified Taylor's equation, given that θ1 > θ2 > θ3?

If the useful tool life of a HSS tool machining mild steel at 18 m/min is 3 hours, what is the tool life when the tool operates at 24 m/min, assuming n = 0.125?

What is the unit of the constant C in Taylor's expression?

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