CAD / CAM / CIM - Dec 2014

Mechanical Engineering (Semester 7)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1 (a) Write short note on significance of rapid prototyping in product development and testing.(6 marks) 1 (b) Write short note on automated material handling and storage systems.(7 marks) 1 (c) Find the equation of a Bezier curve which is defined by the four points as P₀(2,2,0), P₁(3,3,0) and P₃(3,2,0) and also find the points on the curve for u=0, 0.25, 0.5, 0.75, and 1.(7 marks) 2 (a) Write a part program using G and M codes for finishing a forged component as shown in Figure 1. Assume the speed and feed on the turning centre as 500 RPM and 0.3 mm/rev respectively. Furthermore, assume 1mm material is to be removed radially from external diameter. (10 marks) 2 (b) A triangle PQR has its vertices at P(0,0) and R(2,3). It is to be translated by 4 units in X direction, and 2 units in Y direction, then it is to be rotated in anticlockwise direction about the new position of point R through 90 degrees. Find the new position (vertices) of triangle.(10 marks) 3 (a) Select at least an 8 member team and mention their role form a Concurrent Engineering Team" for design and development of a "Computer Table" which can house a "Monitor"(10 marks) 3 (b) Explain with block diagram Computer Aided Quality Control (CAQC) in detail.(10 marks) 4 (a) Write short note on (i) Product life cycle (ii) Visual realism(10 marks) 4 (b) Write a complete APT program (geometric and motion commands) to machine the outline of the geometry as shown in Figure 2. The component is 5 mm tick. The end mill used is 5 mm in diameter. Consider spindle speed as 1000 RPM and feed as 0.3 mm/rev. Assume suitable data if necessary. (10 marks) 5 (a) Write a program in object oriented language for 2D transformation which include functions for the following operations: (i) rotation @ y-axis (ii) scaling.(10 marks) 5 (b) Explain significance of (i) Data capture techniques and (ii) Sociotechno-economic aspects with respect to Computer Integrated Manufacturing (CIM) and technology driven practices.(10 marks) 6 (a) Explain retrieval type process planning system and its benefits.(8 marks) 6 (b) List benefits of using Artificial Intelligence in design of component.(6 marks) 6 (c) Write short notes on design for assembly and disassembly.(6 marks)

Write short note on

7 (a) Adaptive control in manufacturing.(8 marks) 7 (b) Wire frame modelling.(6 marks) 7 (c) Light and shade ray tracing.(6 marks)