Question Paper: Computer Integrated Manufacturing : Question Paper Jun 2015 - Mechanical Engineering (Semester 6) | Visveswaraya Technological University (VTU)

Computer Integrated Manufacturing - Jun 2015

Mechanical Engg. (Semester 6)

(1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.
1 (a) Define Automation. Explain the different types of automation.(8 marks) 1 (b) Explain the following automation strategies.
i) Specialization of operator.
ii) Online Inspection.
(4 marks)
1 (c) The parts produced in a certain batch has to be processed through an average of 6 machines.
There are 20 new batches of parts launched each week. Other data as follows.
i) Average operation time =0.1 Hr.
ii) Average setup time = 5 Hr.
iii) Average non- operation time =10 Hr.
iv) Average Batch size= 25 parts. There are 18 work centres in the plant and the plant operators for an average of 70 production Hr/week . Determine i) Manufacturing lead time ii) Plant capacity iii) Production rate iv) Plant utilization.
(8 marks)
2 (a) Explain synchronous transfer method and Asynchronous transfer method of work transport in automation.(8 marks) 2 (b) Explain with neat sketches, the following transfer mechanism:
i) Walking beam transfer bar system ii) Geneva mechanism.
(12 marks)
3 Explain the following related to analysis of an automated flow lines:
1) Partial automation.
2) Lower bound approach.
3) Upper bound approach.
4) Effect of storage.
(20 marks)
4 (a) Explain the following terms related to line balancing.
1) Total work context time.
2) Assembly line balance.
3) Line balancing.
(6 marks)
4 (b) The table below defines the defines the precedence relationships and elements times for a new model:
i) Construct the precedence diagram.
ii) if the ideal time=1min
iii) Use Kilsridge and Westers method to assign the work station to each elements and compute the balance delay and line efficiency.

<colgroup span="13" style="text-align: center;" width="85"> </colgroup>
Work elements 1 2 3 4 5 6 7 8 9 10 11 12
Te(min) 0.25 0.45 0.35 0.4 0.32 0.2 0.27 0.7 0.6 0.38 0.5 0.43
Preceded by - 1 1 1 2 2,3 4 4 5 6,7 8 91011
(14 marks) 5 (a) List the principles used in product design for automated assembly.(6 marks) 5 (b) With a neat sketch, explain elements of parts delivery system.(8 marks) 5 (c) Define AGVS. List the advantages and application of AGVS.(6 marks) 6 (a) With a block diagram, explain variant CADD system.(10 marks) 6 (b) What is Material requirements? Explain the structure of MRP system.(10 marks) 7 (a) Discuss the advantages and disadvantages of CNC systems.(10 marks) 7 (b) Explain the fundamental steps involved in a part programming for turning and milling.(10 marks) 8 (a) Explain the different configuration of robot, with neat sketches.(12 marks) 8 (b) Explain the following terms related to robots:
i) End effectors ii) Programming methods.
(8 marks)

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