JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III MACHINE TOOL DESIGN Previous Question Paper (August/September - 2024 - R16)
Note: Part A is compulsory (25 Marks). In Part B, Answer any one question from each unit (50 Marks).
Part A
List any two mechanisms in the design of machines.
Answer
- Gearbox mechanism: Used for speed and feed variation in machine tools.
- Cam and follower mechanism: Used for controlling complex motion cycles in automatic machines.
Where is chain transmission takes place in machines?
Answer
Chain transmission is primarily used in machines where a positive drive is required with a large center distance between the driving and driven shafts, such as in heavy-duty feed drives, conveyor systems of machine tools, or where slippage (as seen in belt drives) must be avoided.
What is the aim of speed regulation?
Answer
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What is speed chart and its importance?
Answer
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List out the classification of structures in machines.
Answer
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Differentiate static and dynamic stiffness.
Answer
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What are the common material used for the sideways?
Answer
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What is pre loading of antifriction bearings?
Answer
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What are the basic features of a closed loop system?
Answer
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Why stability analysis is required?
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Part B
What are the general requirements of the machine tool design?
Answer
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What are functionality of the components of the hydraulic transmission in machine tools?
Answer
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What are the parameters considered for the working motion of machine tools?
Answer
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Describe the types of auxiliary motion commonly used in various machines.
Answer
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How the regulation of speed effects any machine tool operations?
Answer
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What aspects are considered in the feed box design?
Answer
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Where and why multiple speed motors are used?
Answer
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Give a brief description of the design of feed drives.
Answer
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What are the functions of machine tool structures?
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What factors are considered while designing saddles?
Answer
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What factors are considered while designing beds and housings?
Answer
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What is the basis of the design with strength for machine tool structures?
Answer
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Describe the procedure for the design of aerostatic slideways.
Answer
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How the anti-friction guideways are designed?
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What is the effect of machine tool compliance on machining accuracy?
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How the spindle and spindle supports are designed?
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Explain the cutting process closed loop system in machine tools elastic system.
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What are the dynamic characteristics of elements and systems?
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Formulate the tlusty’s dynamic cutting force.
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How the user acceptance tests are conducted for static systems?
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