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2003 Course Machine Tool Design

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Total No. of Questions : 12] P1395 [Total No. of Pages : 3 [3764] - 172 B.E. (Production Engineering/Sandwich) MACHINE TOOL DESIGN (2003 Course) Time : 3 Hours] [Max. Marks :100 Instructions to the candidates: 1) Attempt one question of each unit from Section - I and Section - II. 2) Answers to the two sections should be written in separate books. 3) Draw neat diagram wherever necessary. 4) Assume suitable data, if necessary. SECTION - I Unit - I Q1) a) b) Design a six-speed gear box for a machine tool having a minimum speed 60 rpm, G.P ratio = 1.55, speed of motor = 1500 rpm. Draw the best possible Structural diagram, ray diagram, speed chart and gear layout. [14] Discuss the considerations of variator design. [6] OR Q2) a) b) c) For flat disc drive ,derive the equation for frictional torque. Discuss the designs features of feed gear box with Norton drive. Write a Short note on Ball variator. [8] [8] [4] Unit - II Q3) a) b) What the design criteria for beds? How these are applied to for welded and cast beds. [8] Why stiffness is important consideration in machine tool structure? How stiffness is improved explain with figures. [7] OR P.T.O.

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