Computer Integrated Manufacturing - Jun 2015
Mechanical Engg. (Semester 6)
TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (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.
i) End effectors ii) Programming methods.(8 marks)