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IBME-004 1
B.Tech. MECHANICAL ENGINEERING (COMPUTER INTEGRATED MANUFACTURING)
-z Term-End Examination
003O ...;:J.
December, 2016
BME-004 CNC TECHNOLOGY AND PROGRAMMING
Time hours Maximum Marks: 70
Note: Answer any seven questions. All questions carry equal marks. Assume missing data, if any.

1. Describe the different types of production systems used in mechanical engineering industries. 5

With the help of a suitable block diagram, describe the principle of operation of an NC machine tool. 5

2. Explain the general structure of the operation of a typical computerized numerical control machine tool. 5

With the help of suitable examples, differentiate point-to-point and continuous path tool movement in CNC machine tools. 5

3. Give the examples of a few enhancements to programming that are available in the modern CNC control systems. 5

Name the feed drives that are used in CNC machine tools. Explain anyone. 1 4=5

4. Briefly state the purpose of the touch trigger probes. Write its applications with suitable example. 5

Briefly describe the process plan. 5

5. Explain the word address format that is generally used with CNC machining centres. 5

Explain the differences between absolute and incremental programming systems in CNC application. Write the suitability of the two systems mentioned above. 5

6. The component to be machined is shown In Figure . Develop the part program without and with the use of canned cycle. 5 5 <img src='./qimages/8823-6.jpg'>

7. What are the preparatory and miscellaneous functions used in part programming? Name any five G-codes and five M-codes with their functions. 5 5

8. Write the APT geometry statement for the part as identified in Figure <img src='./qimages/8823-8.jpg'>

9. Explain the concept of post-processor as used in computer aided part programming. 10

10. Write short notes on any two of the following: 2x5

(a) MAP AGV Cell Layout