Define the term 'Machine tool'. What are the general requirements of a machine tool?
Differentiate between working motion and auxiliary motion. Mention the drive motion and feed motion for Lathe, Milling, Drilling and Shaper machine.
Determine the machining time for turning a shaft from 70 mm diameter to 64 mm diameter over a length of 200 mm at n = 600 rpm and feed rate s = 0.4 mm/rev. The turning tool has principal cutting edge angle ϕ=45∘\phi = 45^\circϕ=45∘. Assume, approach and over travel is equal and has the value of 2 mm each. Given, depth of cut is 1.5 mm.
Define machine tools drive system. What are the main characteristics of machine tools drive system?
What are the basic elements of machine tools control system? Explain.
A gears box for a head stock needs to give 16 speeds ranging from 50 rpm to 1600 rpm following a GP series. The power is supplied by an electric motor of 10 kW, using at 1440 rpm through a V-belt drive with a speed reduction of 2:1. Construct a suitable structural diagram after developing the corresponding structural formula. Also, construct a speed chart.
Why machine tool testing is necessary? What kind of geometrical tests are performed on a lathe machine?
What is FMS? Classify the layout of FMS. Are there any merit of using FMS? If yes, mention them. Do you find any limitation in FMS?
What do you mean by GT? What are the advantages and disadvantages of it?
Define machine tool. What are the general requirements of a machine tool? Explain briefly.
What is working motion of a machine tool? Classify them. Find out the drive motion and feed motion for the following machine – Lathe machine, drilling machine, shaper machine.
Calculate the machining time for drilling a 30 mm diameter through hole in a 30 mm thick plate at a speed of 30 m/min and feed 0.1 mm/tooth.
What is cam? Explain the benefits of CAD-CAM in manufacturing.
What do you mean by group technology? Why is it necessary? Is there any drawback in group technology?
Why foundation preparation is necessary during machine tool installation? What are the important factors that should be considered during foundation preparation?
Classify machine tools based on (i) degree of automation (ii) weight ratio (iii) degree of specialization. Also how does the working motion can be classified?
Describe the various operation of lathe machine with neat sketch.
What are the general requirements of a machine tool?
Determine the machining time for turning a shaft from ϕ70\phi70ϕ70mm to ϕ64\phi64ϕ64mm over a length of 200mm at n = 600rpm and s = 0.4 mm/rev. The turning tool has principle cutting edge angle ϕ=45∘\phi = 45^\circϕ=45∘. Assume approach and over travel have equal value of 2 mm.
Why machine tool testing is performed? What is checked during geometrical tests?
What is done during performance test of a machine tool?
What is group technology (GT)? Briefly explain the principle of GT.
Design of a machine tool is related to different engineering economic, natural and social sciences - Explain why?
The accuracy of a machine tool depends upon its geometric and kinematic accuracy - Do you support the statement? Justify your answer.
How the machining cost can be reduced?
Define machine tool. Describe the various operations of Lathe machine with proper sketches.
Identify the drive motion and feed motion with necessary figures for the following machine tools: (i) Lathe Machine (ii) Drilling (iii) Milling (iv) Shaping (v) Grinding.
What is "loss of economic cutting speed"? Show that it is constant for GP series type of gear box.
Write short notes on (i) FMS and (ii) CAM.
What is Group technology (GT)? Mention some principles of GT.
Define the term “Machine Tool”. What are the general requirements of machine tools?
Describe the various operation can be performed by lathe machine with neat sketches.
A 30 mm H. S. S. drill is used to drill a hole in a cast iron block of 115 mm thick. Determine the time required to drill the hole of feed is 0.35 mm/rev. Assume an over travel of drill as 4.85 mm. The cutting speed is 28.50 m/min.
Describe the working principle of electric stepless speed drives. What are the advantages and disadvantages of it?