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Q.10 A seamless tube 3 cm out side diameter is reduced in length on a lathe with the help of a single point cutting tool. The cutting speed is 40 m per min. the depth of cut is 0.125 mm. The length of continuous chip, for one revolution of the tube, as measurement comes to be 17.77cm. The cutting force is 200 kg and the feed force is 75 kg. The rake angle of the tool is 35°. Calculate : (i) Coefficient of friction (ii) Chip thickness ratio (iii) Shear plane angle (iv) Velocity of the chip along the tool face. (v) Velocity of shear along shear plane.


Q.10 A seamless tube 3 cm out side diameter is reduced in length on a lathe with the help of a
single point cutting tool. The cutting speed is 40 m per min. the depth of cut is 0.125 mm.
The length of continuous chip, for one revolution of the tube, as measurement comes to be
17.77cm. The cutting force is 200 kg and the feed force is 75 kg. The rake angle of the tool
is 35°.
Calculate :
(i) Coefficient of friction
(ii) Chip thickness ratio
(iii) Shear plane angle
(iv) Velocity of the chip along the tool face.
(v) Velocity of shear along shear plane.

Grade:12

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