CAD / CAM / CIM - May 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) Explain CAD tools required to support the different design phases(6 marks) 1 (b) Explain the adaptive control system by explaining adaptive control constraint and adaptive control optimization.(7 marks) 1 (c) A cubic Bezier curve is defined by the control points as (20, 20), (60, 80), (120,100) and (150, 30). Find the equation of the curve and Its mid point.(7 marks) 2 (a) Write a part program using G and M codes to machine the contour as shown in Figure 1 and drill holes. The component is 18 mm thick.

Assume
(i) Suitable tool
(ii) Suitable speed and feed for machining.
(iii) Show starting point and load unload point. (10 marks) 2 (b) A rectangle ABCD has vertices A(1,1), B(2,1), C(2,3), DU ,3) . It has to to be rotated by 30° CCW about point P (3, 2). Determine: (i) the composite transformation matrix (ii) the new coordinates of rectangle.(10 marks) 3 (a) Explain any one hidden line removal algorithm and explain how the algorithm determines which entities are hidden(10 marks) 3 (b) Explain contact and non-contact inspection methods in Computer Aided Quality Control (CAQC)(10 marks) 4 (a) Explain any two rapid prototyping processes(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. Assume suitable data. (10 marks) 5 (a) Write a program in object oriented language for 2D transformation which include functions for the following operations: (1) rotation @ x-axis (ii) scaling(10 marks) 5 (b) Explain the CIM wheel with neat sketch along with the features and functioning of CIM systems(10 marks) 6 (a) Explain pan classification and coding in Group Technology in detail(7 marks) 6 (b) Explain similarity coefficient matrix(3 marks) 6 (c) List benefits using Artificial Intelligence in CAPP system(5 marks) 6 (d) Write short note on design for assembly(5 marks)

Write short note on (any two)

7 (i) Automated material handling system.(10 marks) 7 (ii) Wire frame modelling(10 marks) 7 (iii) Light and shade ray tracing(10 marks) 7 (iv) 3D rotation transformation(10 marks)