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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – VI• EXAMINATION – SUMMER 2016
Subject Code: 3361901 Date: 07/05/2016
Subject Name: Computer Aided Manufacturing
Time: 10:30 AM to 01:00 PM Total Marks: 70
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authenti
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Q.1 Answer any seven out of ten. 14
1. What is CAM ? Give two advantages of CAM.
2. Draw block diagram of NC and CNC.
3. State any four applications of CAM.
4. Draw CNC axis and nomenclature.
5. Which types of CNC are used in Mass production?
6. State various tool positions on CNC machine for Part programming.
7. Give basic 4 codes with meaning used in CNC Part programming for manufacturing.
8. Why M codes used in CNC Part programming?
9. State types of recent trend used in CAM.
10. Define rapid prototyping and its applications.
Q.2 (a) State the selection criteria for CNC machine. 03
OR
(a) Draw block diagram of DNC and explain in brief. 03
(b) Explain spindle drives and axes drive used in CNC machine. 03
OR
(b) Explain APC for CNC machine. 03
(c) State types and classification of CNC machine, explain any one. 04
OR
(c) Write short note on recirculating ball screw. 04
(d) Explain feedback devices used in CAM. 04
OR
(d) What is ATC ? Explain ATC. 04
Q.3 (a) Explain interfacing standards for CAD/CAM. 03
OR
(a) Define Qualified tools and state its need and advantages. 03
(b) Define Adoptive control and explain. 03
OR
(b) Define FMS and explain. 03
(c) Explain part programming format and structure of part programming. 04
OR
(c) Explain any four G and M code with example commonly used in CAM. 04
Q.4 (a) Write milling part program for fig :1 in ISO format 07
OR
(a) Write milling part program for fig :2 in ISO format 07
(b) Write short note on Canned cycle.03
OR
(b) Write short note on sub routine cycle. 03
(c) Write part program for turning for fig :3 in ISO format 06
Q.5 (a) Explain CNC machining centre. 03
(b) Explain CNC turning centre. 03
(c) Write short note on CIM. 03
(d) Write short note on Robotics. 03
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