JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III MACHINE TOOL DESIGN Previous Question Paper (February - 2023 - 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 significance of auxiliary motions in machine tools.
Answer
Auxiliary motions are essential for non-cutting operations such as loading/unloading workpieces, tool changing, and rapid positioning. They significantly reduce idle time, thereby increasing the overall productivity and efficiency of the machine tool.
Explain the motion transmission.
Answer
Motion transmission involves transferring power and motion from the prime mover (motor) to the working elements (spindle or tool) through various mechanisms. This is achieved using gear trains, belt drives, or hydraulic systems to achieve the required speed, torque, and direction of movement necessary for machining.
Label the aim of feed regulation.
Answer
Sign in to view the complete answer paper.
List the advantages of multiple speed motors.
Answer
Sign in to view the complete answer paper.
Mention the considerations for designing of machine tool structures.
Answer
Sign in to view the complete answer paper.
Interpret the design for strength of machine tool structures.
Answer
Sign in to view the complete answer paper.
Outline the functions of guide ways.
Answer
Sign in to view the complete answer paper.
Summarize antifriction bearings.
Answer
Sign in to view the complete answer paper.
Label the limitations of machine tool elastic system.
Answer
Sign in to view the complete answer paper.
Interpret the importance of dynamic stiffness for machine tools.
Answer
Sign in to view the complete answer paper.
Part B
Evaluate the working of machine tools with neat sketches.
Answer
Sign in to view the complete answer paper.
Analyze the machine tool drives and mechanisms.
Answer
Sign in to view the complete answer paper.
Explain stepped regulation of speeds.
Answer
Sign in to view the complete answer paper.
Build ray diagrams and design considerations.
Answer
Sign in to view the complete answer paper.
Elaborate the design of speed gear boxes in detail.
Answer
Sign in to view the complete answer paper.
Explain the design for rigidity and materials for machine tool structures.
Answer
Sign in to view the complete answer paper.
Analyze the machine tool constructional features of columns, tables, saddles and carriages.
Answer
Sign in to view the complete answer paper.
Build the design of power screws.
Answer
Sign in to view the complete answer paper.
Discuss the effect of machine tool compliance on machining accuracy.
Answer
Sign in to view the complete answer paper.
Construct the design of guide ways and design of aerostatic slide ways.
Answer
Sign in to view the complete answer paper.
Elaborate the static stiffness acceptance tests in detail.
Answer
Sign in to view the complete answer paper.
Discuss the dynamics of machine tools in detail.
Answer
Sign in to view the complete answer paper.