Question Paper: CAD / CAM / CIM : Question Paper May 2015 - Mechanical Engineering (Semester 7) | Mumbai University (MU)
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## CAD / CAM / CIM - May 2015

### 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 concurrent engineering in product desig. (6 marks)

1 (b) Write short note on computer aided process planing (CAPP). (7 marks)

1 (c) Plot the Bezier curve having endpoints P0(1, 3) and P3(7, 2). The other control points are P1(5, 6) and P2 (6, 0). Plot for values for u=0, 0.1, 0.2, ... 1, if the characteristic polygon is drawn in the sequence P0 - P1 - P2, P3. (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 cente as 500 rpm and 0.3 mm/rev respectively. Assume suitable data if necessary. (10 marks)

2 (b) Consider a triangle ABC having coordinates A(5,5) B(8,5) and C(5,10). Determine the new vertex position if.
i) The triangle is rotated by 60°, anticlockwise about the vertex A.
ii) The triangle is scale by 2 times in X direction and 3 times in Y direction about vertex A.
(10 marks)

### Write short note on following:

3 (a) Adaptive control in manufacturing. (8 marks)

3 (b) Artificial Intelligence in Computer Aided Process Planning (CAPP). (6 marks)

3 (c) Socio-techno-economic aspects with respect to Computer Integrated Manufacturing (CIM). (6 marks)

### Write short note on:

4 (a) (i) Essential of Computer Aided Design workstations and its functions. (5 marks)

4 (a) (ii) Visual realism. (5 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 milling tool used is 5 mm in diameter. Consider spindle speed as 1000 rpm and feed as 0.3 mm/rev. Assume suitable data if necessary. (5 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) translation in x-direction. (10 marks)

### Write short note on:

5 (b) (i) Reverse engineering and data capture techniques. (5 marks)

5 (b) (ii) Green Manufacturing. (5 marks)

6 (a) Explain with block diagram Computer Aided Quality Control (CAQC). (10 marks)

### Write short note on:

6 (b) (i) Light and shade ray tracing. (5 marks)

6 (b) (ii) Design for assembly and disassembly. (5 marks)

### Write short note on:

7 (a) Automated material handling and storage system (6 marks)

7 (b) Flexible manufacturing systems (FMS). (6 marks)

7 (c) Feature recognition and design by feature. (8 marks)