Question Paper: CAD - CAM - CIM : Question Paper May 2016 - Mechanical Engineering (Semester 7) | Mumbai University (MU)
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## CAD / CAM / CIM - May 2016

### 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 wire frame modeling, surface modeling and solid modeling.(10 marks) 1(b) Write a manual part programa for finishing a forged component as shown in Fig.1. Assume the spindle speed and feed for machining as 500 rpm and 0.3 mm/rev respectively.

(10 marks) 2(a) A Hermite cubic spline is defined by points (1,1) and (6,5), having tangent vectors as (0,4) and (4,0) respectively. Find the co-ordinates of parametric mid-point and slope at the same point.(10 marks) 2(b) Explain AS/RS and their types.(10 marks) 3(a) Find the transformed co-ordinates of a triangle A (50,20), B(110,20) and C(80,60), if it is reflected about; i) X-axis and ii) Line y = x.(10 marks) 3(b) Explain the nature and role of CIM elements.(10 marks) 4(a) Find the transformation matrix ehich aligns vector K along positive z-axis with vector V = aI + bJ + cK.(10 marks) 4(b) Explain the major steps involved in rapid prototyping, list the various rapid prototyping technologies and explain Stereo-lithography in detail.(10 marks) 5(a) Write a complete APT part program to machine the outline of the geometry and drill a hole as shown in Fig.2. The component is 5 mm thick. The end mill used is 10 mm in diameter and suitable drill. Assume suitable speed and feed for machining.

(12 marks)
5(b) Find the general transformation matrix N for window to view-port mapping.(8 marks)

### Write short notes on

6(a) Knowledge based Engineering(5 marks) 6(b) Computer Aided Engineering(5 marks) 6(c) CIM Hardware and Software(5 marks) 6(d) Rapid Prototyping Applications(5 marks)