Anna University Chennai 2005 B.E Mechanical Engineering computer aided manufacturing - Question Paper

B.E. MECHANICAL ENGINEERING, VI SEMESTER

ME 338 – COMPUTER AIDED MANUFACTURING

TIME – three Hours MAXIMUM : 100 Marks

PART – A (10 x two = 20 Marks)

ans ALL ques.

What is the basis for forming groups in group technology?
Justify the importance of rapid prototyping technology in the current day manufacturing scenario.
Briefly state about the co-ordinate axis nomenclature of a modern CNC milling machine.
Distinguish point to point and continuous path CNC control.
What is a machining center? How it differs from conventional CNC milling machine?
What is a rotary kind encoder?
What do you understand by ‘modal’ and ‘non-modal’ G codes
What is meant by canned cycle? List any four kinds of canned cycle machining.
elaborate the objectives of Product Data Management system?
What is the philosophy of Just in Time (JIT)?

PART – B (5 x 16 = 80 Marks)

(i) define the kinds of electrical drives used for speed
and feed control in CNC machine tools (8 Marks)

(ii) discuss constructional features of linear slides of CNC
machines (8 Marks)

(a). (i) discuss the Optiz coding system generally used in group
technology. (8 Marks)

(ii) discuss the methodology to the followed for developing a
generative kind computer aided process planning system (8 Marks)

(OR)



(b). (i) discuss the stages involved in the development and
manufacturing of a new product (8 Marks)
With a neat sketch, discuss the principle of any 1 kind
of currently used Rapid Prototyping technology (8 Marks)

13.(a). (i) With a block diagram, discuss the different sub-systems
and functions of a modern CNC controller. (8 Marks)
(ii) discuss the subsequent in CNC machining
Linear interpolation
Circular interpolation
Cubic interpolation (8 Marks)

(OR)

(b) (i) elaborate the various kinds of contouring system in a
CNC machine? discuss with neat sketches. (8 Marks)
discuss different kinds of input devices used in modern
CNC controller for loading programs. (8 Marks)

(a). (i) discuss the code used for the subsequent in CNC part
program with example.
1. Circular interpolation in XY plane
2. Tool length compensation
3. Absolute programming (6 Marks)

(ii) For the component shown in Fig Q 14 (a) ii, prepare the
part program using ISO codes. Clearly indicate axis and
the selection of datum point on the sketch of the part. (10 marks)

(OR)

(b). (i) define the function of a post processor in computer
aided of part programming (6 Marks)
(ii) For the shown fig Q 14 (b) ii, write part program
using the APT language. (10 marks)

(a). (i) Briefly discuss about production planning process in
discrete part manufacturing (8 Marks)
(ii) discuss the subsequent
1. Master production scheduling
2. Resource requirement planning
How are they related? (8 Marks)
(OR)
(b). (i) Write about the approaches to be followed to achieve
the goals of JIT. (8 Marks)
(ii) discuss the different data needed for a product
Data Management system (8 Marks)
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Earning:   Approval pending.