07A70301 Unconventional Machining Processes B.Tech Question Paper : scce.ac.in
Name of the College : SREE CHAITANYA COLLEGE OF ENGINEERING
University : JNTUH
Department : Mechanical Engineering
Subject Code/Name : 07A70301/UNCONVENTIONAL MACHINING PROCESSES
Year/Sem : IV/I
Website : scce.ac.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/scce.ac.in/4915-07A70301-UNCONVENTIONALMACHININGPROCESSES.pdf
Unconventional Machining Processes Question Paper :
Code No: 07A70301
R07 Set No. 2
IV B.Tech I Semester Examinations,December 2011
Time: 3 hours
Max Marks: 80
Answer any FIVE Questions :
All Questions carry equal marks :
1. Describe the characteristic features of modern machining processes that distinguish them from conventional machining processes. [16]
2. (a) Describe with a neat sketch, the effect of the gap filling density and clearance between surfaces on the quality of surfaces produced?
(b) What are the various materials, size of abrasives and magnetic particles used in MAF? [8+8]
3. (a) What are the important parts of a transducer used in ultrasonic machining process?
(b) How ultrasonic vibrations are generated using Magnetostriction method? [8+8]
4. (a) How the surface tension and hydro static pressure of molten metal affect the quality of machining in EBM?
(b) Describe the thermal features of melting and evaporation process in LBM?[8+8]
5. Write the factors that aect the performance of WJM (water Jet mchine) process. Discuss their effect in brief. [16]
6. (a) What are the various defects obtained in EDM and wire EDM processes and mention the methods of elimination?
(b) How the MRR, TWR, roughness and inaccuracy in machining by EDM is affected by various parameters? [8+8]
7. (a) Differentiate between EBM and LBM considering atleast five aspects?
(b) Compare the edge production in EBM and LBM. What are the factors influencing edge for maintain in both the processes? [8+8]
8. Describe the \self adjusting feature” in ECM. [16]
Code No: 07A70301
R07 Set No. 4
1. (a) Explain the advantages of Non-traditional machining processes.
(b) What are the limitations of Non-traditional machining processes? [10+6]
2. (a) With a schematic diagram, explain magnetic field distribution and magnetic force action on the magnetic abrasive particles in MAF?
(b) Explain the sequence of operations involved in finishing a ceramic then plate [8+8]
3. Explain the principle and operation of chemical machining using sketches. [16]
4. Discuss the design procedure for exponential concentrator of rectangular cross section in ultrasonic machining system. [16]
5. (a) What are the various factors to be considered in the selection of Etcharts for a particular application?
(b) What are the advantages and applications of chemical machining? [8+8]
6. (a) List few materials which cannot be machined effectively by water jet machining.
(b) How do you compare water jet machining process with conventional machining process considering quality, surface finish, and material removal rate as criteria? [4+12]
7. (a) Describe the thermal features of melting and evapouration process in LBM.
(b) Describe the effects of temperature and election pressure on the quality of machining in EBM? [8+8]
8. Discuss the advantages of EDM as compared to other non traditional methods with regard to
(a) metal removed rate
(b) accuracy and
(c) surface nish. [16]
Unconventional Machining Processes :
1. (a) Explain different applications of Electro chemical machining.
(b) Discuss the advantages and limitations of Electro chemical machining. [8+8]
2. (a) What is mixing ratio? Explain the importance of maintaining an optimum mixing ratio in Abrasive jet machining.
(b) What are the disadvantages of Abrasive jet machining process? [10+6]
3. (a) Explain different parameters that influence the performance of Ultrasonic machining.
(b) Describe various groups of materials that can be machined using Ultrasonic machining. [8+8]
4. (a) What the salient features of AFM and mention the process variables which control MRR.
(b) Comment on re-use of abrasive particles and their effect on the quality of surfaces? [8+8]
5. (a) What is Etch factor and how can it be controlled in chemical machining
(b) Why the quality of surfaces produced is poor in chemical machining when compared to ECM? [8+8]
6. Why do we need conventional machining processes, illustrate with examples. [16]
7. Explain the eect of following parameters an MRR during EDM
(a) Resistance
(b) Magnitute of current
(c) Capacitance. [16]
8. (a) Describe the suitability of LBM and its machining performance, and industrial applications?
(b) What is the mechanism of metal removal in EBM and describe the ffeect of process parameters on the quality of surface produced in it? [8+8]