## CAD CAM CAE - Dec 17

### Mechanical Engineering (Semester 7)

Total marks: 80

Total time: 3 Hours
INSTRUCTIONS

(1) Question 1 is compulsory.

(2) Attempt any **three** from the remaining questions.

(3) Draw neat diagrams wherever necessary.

**Attempt any FOUR**

**1.a.**Viewing Transformation

**1.b.**Why is the rapid prototyping used?

**1.c.**Benefits of CIM.

**1.d.**What is the need for concatenation of transformation?

**1.e.**Machining Centers and its types

**1.f.**Parameter optimization

**2.a.**Determine the parametric representation of the line segment between the position vectors P

_{1}]1 1] and P

_{2}[4 5]. Find the slope and tangent vectors for the line.

**2.b.**Explain Selective Laser Sintering (SLS). How is it different from 3D printing?.

**3.a.**Explain significance of

**i** Data capture techniques and
**ii** Socio-techno-economic aspects with respect to Computer Integrated Manufacturing (CIM) and technology driven practices.

**3.b.**A square with an edge length of 10 units is located on the origin with one of edges at an angle of 30$^\circ$ with the X-axis. calculate the new position of the square if it is rotated about the Z-axis by an angle of 30$^\circ$ in the clock wise direction.

**4.a.**What are the different types of errors which may get introduced while converting the CAD solid model into RPT compatible format?

**4.b.**What are the major steps to solve the problem using FEM? Whether it gives exact answer? Why it has become popular?

**4.c.**The co-ordinates of four data points P

_{0}, P

_{1},P

_{2}and P

_{3}are(2,2,0), (2,3,0), (3,3,0) and (3,2,0) respectively. Find the equation of Bezier curve and determine the co-ordinates of points on the curve for u=0,0.25,0.5,0.75.

**5.a.**Explain CAE Case study based on modeling and analysis of structural (vibration analysis) system.

**5.b.**Write complete part program using the ISO codes for the different holes present in the component as shown in figure. The operations and tools required are given below.

Op.No. | Description | Tools required |
---|---|---|

1 | Drill one hole | Twist drill 5 mm dia |

2 | Counter bore one hole | End mill 8 mm dia |

3 | Drill three holes | Twist drill 5 mm dia |

4 | Tapping three holes | Machine Tap M6 |

**6.a.**Role of CAD/CAM in CIM

**6.b.**Rapid Tooling

**6.c.**P & H refinement methods of CAE

**6.d.**Feedback devices