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2003 Course Advanced Material Processing (Elective II)

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Total No. of Questions : 12] P1331 [Total No. of Pages : 3 [3764]-184 B.E. (Production Engineering) ADVANCED MATERIAL PROCESSING (2003 Course) (Elective - II) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates : 1) 2) Attempt One Question of each unit from Section - I and Section - II. Answers to the two sections should be written in separate books. 3) Draw neat diagram wherever necessary. 4) Assume suitable data, if required. SECTION - I Unit - I Q1) a) Explain the concept of Dynamic Turning. Compare it with ordinary turning. Also state advantages of it. [8] b) Explain with neat sketch a Cryo-grinding process. State its advantages. [8] OR Q2) a) Explain Hot machining process. Is there any heat treatment is required for the component after machining. [8] b) What shall be the requirements for machine tool parts for High speed machining? [8] Unit - II Q3) a) For a RC ckt. adjusted for a maximum power deliver condition, the following data is available : [8] Resistance R = 250 Ohm, Capacitance C = 35 microfarad, Supply voltage V =85 Volts. Calculate : i) ii) Charging current at the instant when the ckt. Switched on, Frequency of discharge. P.T.O. b) With neat sketch explain shaped tube electrolytic machining process with advantages and limitations. [8] OR Q4) a) Calculate the machining rate and electrode feed rate when iron is electrochemically machined using copper electrode and NaCl solution ( s = 5 Ohm-cm) Power supply data of ECM machine used are i) Supply voltage E = 20 V DC, ii) Current I = 5000 Amp, iii) Tool-work Gap h = 0.6 mm (constant), iv) Efficiency = 100% For Iron, Atomic weight = 56 gms, Valancy = 2, Density = 7.8 106 gm/m3. [8] b) Explain different methods of applying dielectric fluid in machining zone in EDM. [8] Unit - III Q5) Write a short note on : [18] a) Isothermal forging, b) Rotary forging, c) Ring rolling. OR Q6) a) What is meant by out of roundness in three roll forming? Explain the factors responsible for it. [9] b) What is Explosive forming? Discuss the process parameters of confined explosive forming. [9] SECTION - II Unit - IV Q7) a) Explain with sketch an injection casting process. b) Explain a suitable casting process for casting Brass component. OR [3764]-184 -2- [8] [8] Q8) a) Compare Brass molding with cast iron molding with respective to casting design, molding process, melting equipment, finishing process. [8] b) Suggest and explain a suitable process for casting of Al and Al alloy ingots. [8] Unit - V Q9) a) Suggest a suitable material and process for production of following plastic components : [10] i) Packaging film ii) iii) Automotive Bumpers v) Radio cabinet iv) Washing machine agitators Buckets. b) Explain with neat sketch a rotational molding process for plastic [8] components. OR Q10) a) Explain with neat sketch a reaction injection molding process for plastic components. State their advantages and limitations. [9] b) Explain the different stages in blow molding for production of glass bottles. [9] Unit - VI Q11) a) What are the basic method used for removing rust and scale from ferrous machined products? Explain any two methods. [8] b) Explain PVD and compare with CVD. [8] OR Q12) a) Explain the basic steps for the surface preparation in thermal spray [8] coating method. State the application this process. b) Explain fabrication of microparts by LIGA process. rrrr [3764]-184 -3- [8]

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