Jawaharlal Nehru Technological University Hyderabad 2010-2nd Sem M.Tech CAD / CAM MTechRegular s tember, COMPUTER AIDED PROCESS PLANNING - Question Paper

Code No: B0403/D0410
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
M. Tech II- Semester Regular exams September, 2010
COMPUTER AIDED PROCESS PLANNING
(CAD / CAM)
Time: 3hours Max. Marks: 60
ans any 5 ques.
All ques. carry equal marks
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1. An overage of 20 new orders are started through a certain factory every month. On
average, an order consists of 50 parts to be processed through 10 machines in the
factory. The operation time per machine for every part = 15 min. The non
operation time per order at every machine averages eight hours and the needed set up
time per order = four hour. There are 25 machines in the factory. 80% of which are
operational of any time (the other 20% are in repair or maintenance). The plant
operates 160 hour/month. However, the plant manager complaints that a total of
100 over time machine hours must be authorized every month in order to keep up
with the production schedule.
a) What is the manufacturing lead time for an avg. order?
b) What is the plant capacity/ month?
c) What is the utilization of the plant according to the definition?
d) Determine the avg. level of work in process in the plant.
e) Determine WIP ratio and TIP ratio.

2. elaborate the methods of tolerance allocation and discuss them.

3.a) explain the computer simulation of automated flow lines and list the simulation
packages available in the market.
b) An 8 station rotary indexing machine operates with an ideal cycle time of 20
seconds. The frequency of line stop occurrences is 0.06 stop/cycle on the avg..
When a stop occurs, it takes an avg. of three min to make repairs. Determine the
subsequent
a) avg. production time
b) avg. production rate
c) Line efficiency
d) Proportion of down time.

4. discuss the "MULTI CLASS" system of classification and coding system with
example.

5. List the benefits of group technology and discuss any 4 of them in detail.

6. explain about the "knowledge based production planning" system and discuss
any 1 tool available for it.

7. elaborate the methods for optimal selection of machining parameters and discuss
the reasons behind it.

8. discuss the subsequent terms
a) Design tolerances
b) Manufacturing tolerances
c) MIPLAN system.

Earning:   Approval pending.