In orthogonal turning of medium carbon steel, the specific machining energy is $2. J / m m^{3}$ . The cutting velocity, feed and depth of cut are $120 m / m i n, 0.2 m m / r e v$ and $2 m m$ respectively. The main cutting force in $N$ is

40

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80

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400

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800

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Solution

The correct option is D $800$
The energy consumption per unit volume of material removal, commonly known as specific energy,
Cutting force $= 2 \times 1000 \times 0.2 \times 2 = 800 N$

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Linked Question
A low carbon steel bar of $147 m m$ diameter with a length of $630 m m$ is being turned with an uncoated carbide insert. The observed tool lives are $24 m i n$ and $12 m i n$ for cutting velocities of $90 m / m i n$ and $120 m / m i n$ respectively. The feed and depth of cut are $0.2 m m / r e v$ and $2 m m$ respectively. Use the unmachined diameter to calculate the cutting velocity.

When tool life is $20 m i n$ the cutting velocity in $m / m i n$ is

Linked Question
A low carbon steel bar of $147 m m$ diameter with a length of $630 m m$ is being turned with an uncoated carbide insert. The observed tool lives are $24 m i n$ and $12 m i n$ for cutting velocities of $90 m / m i n$ and $120 m / m i n$ respectively. The feed and depth of cut are $0.2 m m / r e v$ and $2 m m$ respectively. Use the unmachined diameter to calculate the cutting velocity.

Neglect over-travel or approach of the tool. When too life is $20 m i n$ , the machining time in min for a single pass is

Q. In orthogonal turning of a low carbon steel bar of diameter

150 m m

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. The feed is

0.24 m m / r e v

and the depth of cut is

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. The chip thickness obtained is

0.48 m m

. If the orthogonal rake angle is zero and the principal cutting edge angle is

90^{o}

, the shear angle in degree is

Common Data:
A disc of $200 m m$ outer and $80 m m$ inner diameter is faced at a feed of $0.1 m m / r e v$ with a depth of cut of $1 m m$ . The facing operation is undertaken at a constant cutting speed of $90 m / m i n$ in a CNC lathe The main (tangential) cutting force is $200 N$

Neglecting the contribution of the feed force towards cutting power, the specific cutting energy in $J / m m^{3}$ is

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In orthogonal turning of medium carbon steel, the specific machining energy is 2.J/mm3. The cutting velocity, feed and depth of cut are 120m/min,0.2mm/rev and 2mm respectively. The main cutting force in N is

The correct option is D 800The energy consumption per unit volume of material removal, commonly known as specific energy, Cutting force =2×1000×0.2×2=800N

In orthogonal turning of medium carbon steel, the specific machining energy is $2. J / m m^{3}$ . The cutting velocity, feed and depth of cut are $120 m / m i n, 0.2 m m / r e v$ and $2 m m$ respectively. The main cutting force in $N$ is

The correct option is D $800$
The energy consumption per unit volume of material removal, commonly known as specific energy,
Cutting force $= 2 \times 1000 \times 0.2 \times 2 = 800 N$