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Manufacturing and Production: Part 19
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Chip thickness ratio

Ashish Futtan is teaching live on Unacademy Plus

Ashish Futtan
MTECH IIT Bombay|Quora Top Writer for GATE Mechanical 2019|Cracked IIT (ISM) Dhanbad,IIT DELHI|3 times GATE qualified| Singer|

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1. 1 manufacturing and production

2. HELLO! I am ASHISH FUTTAN MTECH-lIT BOMBAY TOP STAR EDUCATOR VERIFIED EDUCATOR CRACKED VARIOUS IITs 3 TIMES GATE QUALIFIED PUBLISHED MORE THAN 600 LESSONS

3. GATE-2001 During orthogonal cutting of mild steel with a 10 rake angle tool, the chip thickness ratio was obtained as 0.4. The shear angle (in degrees) evaluated from this data is (a) 6.53(b) 20.22 (c) 22.94 (d) 50.00

4. IES-1994 The following parameters determine the model of continuous chip formation: 1. True feed 2. Cutting velocity 3. Chip thickness 4. Rake angle of the cutting tool The parameters which govern the value of shear angle would include (a)1,2 and 3 (b) (c) 1,2 and 4 (d) 1,3 and 4 2,3 and 4

5. IES-2004 Consider the following statements with respect to the relief angle of cutting tool: 1. This affects the direction of chip flow 2. This reduces excessive friction between the tool and work piece 3. This affects tool life 4. This allows better access of coolant to the tool work piece interface Which of the statements given above are correct? (a) 1 and 2 (b) 2 and 3 (c) 2 and 4 (d) 3 and 4

6. IES-2006 Consider the following statements: 1. A large rake angle means lower strength of the cutting edge. 2. Cutting torque decreases with rake angle. Which of the statements given above is/are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2

7. IES-2004 Match. List I with List Il and select the correct answer using the codes given below the Lists: List I List II A. Plan approach angle 1. Tool face B. Rake angle2.Tool flank C. Clearance angle 3. Tool face and flank D. Wedge angle 4. Cutting edge 5.Tool nose A B C DA B C D (a) 1 4 2 5 (b) 4 1 3 2 (c) 4 1 2 3 (d) 1 4 3 5

8. IAS-2003 In orthogonal cutting, shear angle is the angle between (a)Shear plane and the cutting velocity (b) Shear plane and the rake plane (c) Shear plane and the vertical direction (d) Shear plane and the direction of elongation of crystals in the chip

9. IAS-2002 If V = cutting velocity, shear angle, rake angle, the chip velocity is V sin cos ( - ) Vcos sin( - ) Yos(a-a) COS (b) sin COS

10. IAS-2000 The chip thickness ratio r is given by cos sin( - ) sin( - ) COS cos ( - ) sin Sin cos( - )