Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech III MACHINE TOOL DESIGN Previous Question Paper (March - 2024 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Outline the introduction to machine tool drives.
Answer
Machine tool drives are the power transmission systems that provide the necessary motion and torque to the cutting tool or workpiece. They convert energy from a prime mover, such as an electric motor, into controlled rotational or linear movements required for machining operations.
Summarize the operation of machine tools.
Answer
Machine tools operate by removing material from a workpiece through relative motion between the tool and the part. This involves a primary cutting motion (to provide speed) and a feed motion (to provide the rate of material removal), controlled by drive systems and structural components to ensure geometric accuracy and surface finish.
Label the aim of speed regulation.
Answer
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List the limitations of ray diagrams.
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Outline the significance of saddles and carriages in machine tool structure.
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What is the significance for designing of machine tool structures?
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List the types of guide ways.
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Label the functions of spindles.
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Outline the importance of static stiffness for machine tools.
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What are the applications of dynamics of machine tools?
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Part B
Explain the auxiliary motions in machine tools.
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Analyze the kinematics of machine tools in detail.
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Discuss the working of multiple speed motors with neat diagram.
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Construct the design of feed drives and feed box design in detail.
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Explain the functions of machine tool structures and their requirements in detail.
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Discuss machine tool constructional features, beds and housings in machine tool structure.
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Elaborate the design of anti-friction guide ways and combination guide ways.
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Explain the design of power screws.
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Discuss the design of spindles and spindle Supports.
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Build the machine tool elastic system in detail.
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Elaborate the dynamic stiffness acceptance tests in detail.
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