Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 7th Sem Old COMPUTER AIDED MANUFACTURING 172501 Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER?VII(OLD) ? EXAMINATION ? WINTER 2017
Subject Code: Computer Aided Manufacturing Date:18/11/2017
Subject Name: 172501
Time: 10.30 AM TO 01.00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Support your answers by neat sketches wherever necessary.
5. Use of G ? codes & M ? codes provided by GTU is permitted.
Q.1 (a) Write advantages & disadvantages of CNC machines. 07
(b) Explain various stages involved with NC manufacturing. How do they differ
from conventional manufacturing stages?
07
Q.2 (a) Explain with neat sketches the following:
(i) Machine zero (ii) Program zero (iii) Part zero
07
(b) Name different punch tape readers & explain any two of them. 07
OR
(b) Explain briefly the constructional features ball screw with neat sketches & state
its application.
07
Q.3 (a) Explain Do loop and Macro facilities of programming with suitable examples. 07
(b) The figure -1shows the dimensions of a finished component to be made from a
bar of ?80 mm X 135 mm. Write the manual part programme to machine the
component using G90 canned cycle. Refer to Table -1 for G-codes & M-codes.
Use following process plan:
Operation
No.
Operation
Tool
No.
Cutting
Speed
(m/min)
Feed
Rate
(mm/rev)
Depth of
Cut
(mm)
10 Facing 01 160 0.15 -
20 Rough turning 03 200 0.20 4 (max.)
30 Finish turning 03 200 0.15 1.5(max.)
07
OR
Q.3 (a) What is Automated Guided Vehicles? Explain different types of AGVs with
their advantages and limitations.
07
(b) Prepare the process plan & write manual part programme for profile milling of
the part shown in figure -2. Assume the plate thickness to be 10 mm. Refer to
Table -1 for G-codes & M-codes.
07
Q.4 (a) What are different types of computer aided process planning? Explain with
suitable examples.
07
(b) Write short notes on: (i) Robot sensors & (ii) End-effectors in robots. 07
OR
Q.4 (a) Give advantages, limitations and applications of flexible manufacturing system. 07
(b) What is group technology? Explain benefits of GT. 07
Q.5 (a) What is meant by adaptive control? Explain all types of adaptive control. 07
(b) Write short note on ?Selective Laser Sintering? technique of rapid prototyping. 07
OR
Q.5 (a) Define Mechatronics. Discuss various elements of mechatronics. 07
FirstRanker.com - FirstRanker's Choice
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER?VII(OLD) ? EXAMINATION ? WINTER 2017
Subject Code: Computer Aided Manufacturing Date:18/11/2017
Subject Name: 172501
Time: 10.30 AM TO 01.00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Support your answers by neat sketches wherever necessary.
5. Use of G ? codes & M ? codes provided by GTU is permitted.
Q.1 (a) Write advantages & disadvantages of CNC machines. 07
(b) Explain various stages involved with NC manufacturing. How do they differ
from conventional manufacturing stages?
07
Q.2 (a) Explain with neat sketches the following:
(i) Machine zero (ii) Program zero (iii) Part zero
07
(b) Name different punch tape readers & explain any two of them. 07
OR
(b) Explain briefly the constructional features ball screw with neat sketches & state
its application.
07
Q.3 (a) Explain Do loop and Macro facilities of programming with suitable examples. 07
(b) The figure -1shows the dimensions of a finished component to be made from a
bar of ?80 mm X 135 mm. Write the manual part programme to machine the
component using G90 canned cycle. Refer to Table -1 for G-codes & M-codes.
Use following process plan:
Operation
No.
Operation
Tool
No.
Cutting
Speed
(m/min)
Feed
Rate
(mm/rev)
Depth of
Cut
(mm)
10 Facing 01 160 0.15 -
20 Rough turning 03 200 0.20 4 (max.)
30 Finish turning 03 200 0.15 1.5(max.)
07
OR
Q.3 (a) What is Automated Guided Vehicles? Explain different types of AGVs with
their advantages and limitations.
07
(b) Prepare the process plan & write manual part programme for profile milling of
the part shown in figure -2. Assume the plate thickness to be 10 mm. Refer to
Table -1 for G-codes & M-codes.
07
Q.4 (a) What are different types of computer aided process planning? Explain with
suitable examples.
07
(b) Write short notes on: (i) Robot sensors & (ii) End-effectors in robots. 07
OR
Q.4 (a) Give advantages, limitations and applications of flexible manufacturing system. 07
(b) What is group technology? Explain benefits of GT. 07
Q.5 (a) What is meant by adaptive control? Explain all types of adaptive control. 07
(b) Write short note on ?Selective Laser Sintering? technique of rapid prototyping. 07
OR
Q.5 (a) Define Mechatronics. Discuss various elements of mechatronics. 07
2
(b) What is part family? Explain various classification and coding systems of group
technology.
07
*****************
Figure ? 1 [Q.3 (b)]
Figure ? 2 [OR Q.3 (b)]
Table -1
FirstRanker.com - FirstRanker's Choice
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER?VII(OLD) ? EXAMINATION ? WINTER 2017
Subject Code: Computer Aided Manufacturing Date:18/11/2017
Subject Name: 172501
Time: 10.30 AM TO 01.00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Support your answers by neat sketches wherever necessary.
5. Use of G ? codes & M ? codes provided by GTU is permitted.
Q.1 (a) Write advantages & disadvantages of CNC machines. 07
(b) Explain various stages involved with NC manufacturing. How do they differ
from conventional manufacturing stages?
07
Q.2 (a) Explain with neat sketches the following:
(i) Machine zero (ii) Program zero (iii) Part zero
07
(b) Name different punch tape readers & explain any two of them. 07
OR
(b) Explain briefly the constructional features ball screw with neat sketches & state
its application.
07
Q.3 (a) Explain Do loop and Macro facilities of programming with suitable examples. 07
(b) The figure -1shows the dimensions of a finished component to be made from a
bar of ?80 mm X 135 mm. Write the manual part programme to machine the
component using G90 canned cycle. Refer to Table -1 for G-codes & M-codes.
Use following process plan:
Operation
No.
Operation
Tool
No.
Cutting
Speed
(m/min)
Feed
Rate
(mm/rev)
Depth of
Cut
(mm)
10 Facing 01 160 0.15 -
20 Rough turning 03 200 0.20 4 (max.)
30 Finish turning 03 200 0.15 1.5(max.)
07
OR
Q.3 (a) What is Automated Guided Vehicles? Explain different types of AGVs with
their advantages and limitations.
07
(b) Prepare the process plan & write manual part programme for profile milling of
the part shown in figure -2. Assume the plate thickness to be 10 mm. Refer to
Table -1 for G-codes & M-codes.
07
Q.4 (a) What are different types of computer aided process planning? Explain with
suitable examples.
07
(b) Write short notes on: (i) Robot sensors & (ii) End-effectors in robots. 07
OR
Q.4 (a) Give advantages, limitations and applications of flexible manufacturing system. 07
(b) What is group technology? Explain benefits of GT. 07
Q.5 (a) What is meant by adaptive control? Explain all types of adaptive control. 07
(b) Write short note on ?Selective Laser Sintering? technique of rapid prototyping. 07
OR
Q.5 (a) Define Mechatronics. Discuss various elements of mechatronics. 07
2
(b) What is part family? Explain various classification and coding systems of group
technology.
07
*****************
Figure ? 1 [Q.3 (b)]
Figure ? 2 [OR Q.3 (b)]
Table -1
3
NC/CNC Manual Part Programming Codes
Turning Center FANUC OT Controller Machining Center FANUC OM Controller
G00 Positioning in Rapid G00 Positioning in Rapid
G01 Linear Interpolation G01 Linear Interpolation
G02 Circular Interpolation (CW) G02 Circular Interpolation (CW)
G03 Circular Interpolation (CCW) G03 Circular Interpolation (CCW)
G04 Dwell G04 Dwell
G20 Inch Units Programming G17 XY Plane
G21 Metric Units Programming G18 XZ Plane
G28 Automatic return to reference point G19 YZ Plane
G29 Automatic return from reference point G20 Inch Units Programming
G40 Cutter compensation Cancel G21 Metric Units Programming
G41 Cutter compensation Left G28 Automatic return to reference point
G42 Cutter compensation Right G29 Return from Zero Return Position
G43 Tool Length Compensation (Plus) G40 Cutter compensation Cancel
G44 Tool Length Compensation (Minus) G41 Cutter compensation Left
G49 Tool Length Compensation Cancel G42 Cutter compensation Right
G50 Maximum spindle speed in rpm G43 Tool Length Compensation (Plus)
G96 Constant surface speed ON G44 Tool Length Compensation (Minus)
G97 Constant surface speed OFF G49 Tool Length Compensation Cancel
G98 Feed rate, per min G90 Absolute Positioning/ Programming
G99 Feed rate, per rev. G91 Incremental Positioning/ Programming
G94 Feed rate, per min
G95 Feed rate, per rev.
G98 Return to initial point level
G99 Return to R point level
Canned Cycles
Canned Cycles
G90 Single Pass Turning Cycle G73 High Speed Peck Drilling Cycle
G92 Single Pass Threading Cycle G74 Left hand Tapping Cycle
G94 Single Pass Facing Cycle G76 Fine Boring Cycle
G70 Finishing Cycle G80 Cancel Canned Cycles
G71 Turning Cycle G81 Spot Drilling Cycle
G71 Multi-pass Rough Turning Cycle G82 Counter Boring Cycle
G72 Multi-Pass Rough Facing Cycle G83 Deep Hole Peck Drilling Cycle
G73 Pattern Repeating G84 Right hand Tapping cycle
G74 Grooving in Z-axis G85 Boring Cycle
G75 Grooving in X-axis
G76 Multi-Pass Thread Cutting
Miscellaneous Codes
M00 Program Stop M06 Tool Change
M01 Optional Program Stop M98 Subprogram Call
M02 Reset M99 Subprogram End
M03 Spindle On/start Clockwise M70 Mirror On ? X
M04 Spindle On/start Counterclockwise M71 Mirror On ? Y
M05 Spindle Stop M80 Mirror Off ? X
M08 Coolant On M81 Mirror Off ? Y
M09 Coolant Off M30 Program End & Rewind
M30 Program End & Rewind M00
to
M09
? same as Turning Center codes
FirstRanker.com - FirstRanker's Choice
This post was last modified on 20 February 2020