7/27/2019 Advanced Manufacturing Process (2)

1/2

Ex/PG/ME/T/1291/180/2010

MASTERO F M ECHANICAL ENGINEERING EXAMINATION, 2010

(2nd Semester)

ADVANCED MANUFACTURING PROCESS

Time : Three hours Full Marks : 100

Answer any fivequestions taking at least twofrom any group.

Assume suitable data if necessary.

GROUP A

1. a) What are the different types of sampling plans? Explain

them.

b) What is OC curve? Explain its use in inspection indicating

the salient features on it.

c) Give necessary block diagrams of three inspection

alternatives. Label the diagrams.

d) An inspector has inspected a batch of 100 parts, reporting a

total of 12 defective parts in the batch. On careful re-

examination, it was found that four of these reported defects

were in fact good pieces, whereas a total of six defective

units in the batch were undetected by the inspector. What is

the inspectors accuracy in this instance? 5+5+5+5

2. a) State and explain about the different types of contact probe

configurations in CMM. Give necessary sketches. With an

example, explain how is the compensation for probe tip

made.

[ Turn over

[ 4 ]

9. Write short notes on : 54

a) Thermosetting plastic

b) Polymerization

c) Thermoforging

d) Transfer Molding.

7/27/2019 Advanced Manufacturing Process (2)

2/2

[ 2 ] [ 3 ]

[ Turn over

b) Sketch to show the gantry type and cantilever type

mechanical structure of CMM.

c) The coordinates at the two ends of a certain length

dimension of a mechanical component have been measured

by a CMM. The coordinates of the first end are (2347,

4811, 025) and those of the opposite end are (7352, 2170,

6038). All dimensions are in mm. The given coordinates

have been corrected for probe tip radius. Determine the

length dimension that would be computed by the CMM

software. 6+4+10

3. a) What is meant by machine vision? With the help of a sketch

the basic functions of a machine vision system.

b) A video camera has 512512 pixel matrix. Each pixel must

be converted from an analog signal to the corresponding

digital signal by an ADC. The analog-to-digital conversion

process takes 01s to complete, including the time to move

between pixels. How long will it take to collect the image

data from one frame, and is this time compatible with

processing a t the rate of 30 frames per second?

c) With necessary sketches, explain scanning laser device and

linear array device for measurement purpose. 7+4+9

4. a) With the help of necessary sketches explain the basic

principle of the generative manufacturing processes. With

an example show the necessary steps involved in rapid

prototyping.

b) What is selective laser sintering process? Discuss the

process with il lustrative sketch(es) . 5+5+10

GROUP B

5. Write down at least two manufacturing techniques with process

parameters of making metal matrix composites in detail. 20

6. a) What are the parameters used to design the organic

structures of plastics? What are the factors affecting the

properties of polymer? Discuss briefly.

b) What is casting of plastics? Discuss the advantages and

disadvantages of this process. (4+8)+(2+6)

7. a) What are the basic principles for the design of plastic

components? Discuss in detail.

b) What are the types of cutting tools used for machining of

plastics? Which types of machining are recommended for

precision machine of plastics? Discuss in detail. 10+10

8. What are the ceramic materials used in Bio-medicals? What are

the advantages of such materials in Bio-medical field?

OR

Name the different types of ceramic materials and its industrial

application in detail. 20