Which pair of following statements is correct for orthogonal cutting using a single-point cutting tool?
P. Reduction in friction angle increases cutting force
Q. Reduction in friction angle decreases cutting force
R. Reduction in friction angle increases chip thickness
S. Reduction in friction angle decreases chip thickness

P

and

R

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P

and

S

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Q

and

R

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Q

and

S

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Solution

The correct option is D $Q$ and $S$
For orthogonal cutting using a single-point cutting tool.
Q. Reduction in friction angle decreases cutting force
S. Reduction in friction angle decreases chip thickness

Suggest Corrections

Similar questions

Q. In an orthogonal machining with a single point cutting tool of rake angle

10^{o}

, the uncut chip thickness and the chip thickness are

0.125 m m

and

0.22 m m

respectivley. Using Merchant's first solution for the condition of minimum cutting force, the coefficient of friction at the chip-tool interface is
(round off to two decimal places).

Q. In an orthogonal cutting test, the following observation were made
Cutting force

= 1200 N

Thrust force

= 500 N

Tool rake angle

= z e r o

Cutting speed

= 1 m / s

Depth of cut

= 0.8 m m

Chip thickness

= 1.5 m m

Friction angle during machining will be

Common Data:
In an orthogonal machining operation:
Uncut thickness $= 0.5 m m$
Cutting speed $= 20 m / m i n$
Rake angle $= 15^{o}$
Width of cut $= 5 m m$
Chip thickness $= 07 m m$
Thrust force $= 200 N$
Cutting force $= 1200 N$
Assume Merchant's theory.

The coefficient of friction at the tool-chip interface is