GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII (OLD) EXAMINATION - SUMMER 2019
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Subject Code: 181903 Date: 13/05/2019
Subject Name: Production Technology
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Explain chip removal mechanism. What is the difference between oblique machining and orthogonal machining? 07
(b) In an orthogonal cutting operation, the tool has a rake angle=15°. The chip thickness before the cut = 0.30 mm and the cut yields a deformed chip thickness = 0.65 mm. Calculate (a) the shear plane angle and (b) the shear strain for the operation. What is a tool-chip thermocouple? 07
Q.2 (a) Name and briefly describe the types of chips that occur in metal cutting. 07
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(b) Enlist force acting on the chip in orthogonal cutting. Explain the characteristics of different types of tool wear. 07
OR
(b) What is tool life? State factors influencing on it in detail. 07
Q.3 (a) What are the different types of thread manufacturing processes? Explain with neat sketch. 07
(b) Differentiate between gear forming and gear generating methods. What are advantages & limitations of gear Hobbing process? 07
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OR
Q.3 (a) List various principles of location and explain the 3-2-1 Principal of Location with neat sketches. 07
(b) How the Presses are classified? Explain the methods of reducing the force requirement in presswork operation: 07
Q.4 (a) Sketch a two-way clamp. Describe the design principles for drilling jigs. 07
(b) What is Strip layout? Explain in detail with suitable diagram. 07
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OR
Q.4 (a) What is Clearance in Press Tool Design? Explain Compound and Combination die with the help of suitable sketch. 07
(b) What is the difference between a capstan & turret lathe? Describe in brief with the help of suitable sketch. 07
Q.5 (a) Classify various unconventional machining processes. Also, give its advantage over Conventional machining processes. 07
(b) Explain working principle of LBM Process. State its important applications in practice. 07
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OR
Q.5 (a) Explain the different machine tool structures. 07
(b) Differentiate EDM and Wire EDM. Explain Characteristic of dielectric fluid used in EDM process. 07
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