CNC LAB | DIPLOMA 5th and 6th Semester | mechanical engineering
CNC LAB
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Course
Title: CNC LAB |
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Scheme (L:T:P) : 0:2:4 |
Total
Contact Hours: 78 |
Course Code: 15ME64P |
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Type
of Course: Tutorial and practice |
Credit :03 |
Core/ Elective: Core(practice) |
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CIE:25 Marks SEE:50 Marks |
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Prerequisites:
Learning
concepts of Computer Integrated manufacturing
Course Objectives:
1.
By undergoing this lab the students will learn to use the CNC machines efficiently for
manufacturing desired products and knowledge of programming and use of CNC tooling
Course Out comes
Students On successful completion of the course, the
students will be able to attain CO:
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Course
Outcome |
CL |
Linked experiments |
Linked PO |
Teaching Hrs |
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CO1 |
Appreciate the importance of CNC lathe and CNC Milling machines |
U/A |
1-10 |
2,3,4 |
18 |
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CO2 |
Understand the codes (G-code and M- Code)
used in CNC machines for programming |
U/A |
1-10 |
2,3,4 |
15 |
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CO3 |
Develop Programming skills
and crate an component for required drawing, Simulate the prepared part
programme using available simulation software’s. And Prepare the parts on CNC |
U/A |
1-10 |
2,3,4 |
27 |
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Total
sessions |
78 |
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Legend:
U: Understand A: application
COURSE-PO ATTAINMENT MATRIX
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Course |
Programme Outcomes |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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CNC LAB |
0 |
3 |
3 |
3 |
0 |
0 |
0 |
0 |
0 |
0 |
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Level
3- Highly Addressed, Level 2-Moderately Addressed, Level 1-Low Addressed. Method
is to relate the level of PO with the number of hours devoted to the COs
which address the given PO. If >40% of classroom sessions addressing a
particular PO, it is considered that PO is addressed at Level 3 If
25 to 40% of classroom sessions addressing a particular PO, it is considered
that PO is addressed at Level 2 If 5 to 25% of classroom sessions addressing
a particular PO, it is considered that PO is addressed at Level 1 If < 5% of classroom sessions
addressing a particular PO, it is considered that PO is considered
not-addressed. |
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LIST OF GRADED PRACTICAL EXERCISES
The practical/Graded exercises should be properly designed and
implemented with an attempt to develop different types of learning out comes in
affective domain and psychomotor domain, so that students are able to acquire
the necessary skills. Following is the list of experiments to be carried out.
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Exer cise No. |
Practical/Exercise |
Apprx. Hrs. Required |
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PART A. CNC turning centre part programming Students would: a. Sketch each part with dimensions. b. Prepare CNC part programme using G and M codes with ISO format. C.Show
various zeros and tool path on part sketch with color codes and dimensions. d.
Simulate the prepared part programme using available simulation software’s. e. Prepare the parts on CNC |
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1 |
Develop a part program for step turning and simulate |
06 |
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2 |
Develop a part program for taper turning and simulate |
06 |
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3. |
Develop a part program for circular interpolation and simulate |
06 |
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4 |
Develop a part program for multiple turning operation and simulate |
06 |
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5 |
Develop a part program for thread cutting, grooving and simulate |
06 |
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6 |
Develop a part program for internal drills, boring and simulate |
06 |
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PART- B. CNC machining centre
part programming Students would: a. Sketch each part with dimensions. b. Prepare CNC part programme using G and M codes with ISO format. C.
Show various zeros and tool path on part sketch with color codes and
dimensions. d.
Simulate the prepared part programme using available simulation software’s. e. Prepare the parts on CNC |
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7 |
Develop a part program for grooving and simulate on CNC Milling |
09 |
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8 |
Develop a part program for drilling (canned cycle) and simulate |
09 |
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9 |
Develop a part program for mirroring with subroutines and simulate |
12 |
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10 |
Develop a
part program for rectangular and circular pocketing and simulate |
12 |
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TOTAL |
78 |
® TEXT BOOKS & REFERENCE
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S. No . |
Title of Book |
Author |
Publication |
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1 |
CNC Machines. |
Pabla B.S., Adithan M. |
New Age International, New
Delhi,2014(reprint). |
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2 |
CAD/CAM: computer aided design and manufacturing. |
Groover Mikell P, Zimmered W Emory |
Prentice
Hall 2014. |
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3 |
Computer Numerical
Control- Turning and Machining centers. |
Quesada Robert |
Prentice Hall 2014. |
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4 |
CAD/CAM. |
Sareen Kuldeep |
S.Chand 2012. |
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5 |
Introduction to NC/CNC
Machines. |
Vishal S. |
S.K.Kataria & Sons. 2012. |
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6 |
Computer Aided
Manufacturing. |
Rao P N, Tiwari N K,
Kundra T |
Tata McGraw Hill 2014. |
SUGGESTED LEARNING RESOURCES
å
http://www.youtube.com/watch?v=M3eX2PKM1RI
å
http://www.youtube.com/watch?v=EHQ4QIDqENI&list=PLBkqkLQO2nAt5
å
http://www.youtube.com/watch?v=hJFLcvtiNQI
å
http://www.youtube.com/watch?v=BIM1AyxfYkw .
å
http://www.swansoftcncsimulator.com
SUGGESTED LIST OF STUDENT ACTIVITES
1.
Each student should submit any one of the following type activity or any other similar activity related to the
course and before take up get it approved from concerned Teacher and HOD.
2.
Each student should conduct different activity and no repeating should occur
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1 |
Visit
nearby industry having CNC machines. List and state important features of
them with detail specifications and name of manufacturers. |
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2 |
Download free simulation software’s
available on website and practice for part programming |
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3 |
At least take two simple mechanical components likes step turned
shaft, sleeve, muff measure the dimensions, prepare the sketch and develop part program,
then simulate |
Course Delivery:
The course will be delivered through specific instructional strategies
detailed as below
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S.N. |
Unit Name |
Strategies |
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1 |
Introduction. |
Videos, Presentations,
Demonstration. |
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2 |
CNC Turning &
Machining Centers.. |
Videos, Presentations,
Industrial Visits, Demonstration, |
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3 |
CNC part programming. |
Simulation
software, actual practice on CNC machines, Demonstration, |
Course Assessment and Evaluation Scheme:
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Method |
What |
To whom |
When/Where (Frequency in the course) |
Max Marks |
Evidence collected |
Course outcomes |
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CIE (Continuous Internal
Evaluation) |
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Two Tests |
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(Average of two tests to |
10 |
Blue books |
1,2,3 |
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be computed) |
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IA Tests |
Students |
Record Writing (Average marks of each exercise to
be |
10 |
Record Book |
1,2,3 |
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computed) |
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Activity |
05 |
Report |
1,2,3 |
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TOTAL |
25 |
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SEE |
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(Semester End |
End Exam |
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End of the course |
50 |
Answer scripts at BTE |
1,2,3 |
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Examination) |
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Student Feedback on course |
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Middle of the course |
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Feedback forms |
1,2,3, Delivery
of course |
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1,2,3 |
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Effectiveness |
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Students |
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of Delivery |
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End of Course Survey |
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End of the course |
Questionnaires |
of instructions |
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Assessment |
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Methods |
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å MODEL OF RUBRICS /CRITERIA FOR ASSESSING
STUDENT ACTIVITY
RUBRICS MODEL
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RUBRICS FOR ACTIVITY( 5
Marks) |
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Dimension |
Unsatisfactory |
Developing |
Satisfactory |
Good |
Exemplary |
Student Score |
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1 |
2 |
3 |
4 |
5 |
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Collection of data |
Does not collect any information relating to the topic |
Collects
very limited information;
some relate to the topic |
Collect
much information; but very limited relate to the topic |
Collects some basic information;
most refer to the topic |
Collects a great deal of information; all refer to the topic |
Ex:
4 |
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Fulfill
team’s roles & duties |
Does
not perform any duties assigned
to the team role |
Performs very little duties but unreliable. |
Performs
very little duties |
Performs nearly all duties |
Performs
all duties of assigned
team roles |
5 |
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Shares
work equally |
Always
relies on others to do the work |
Rarely does the assigned work; often needs reminding |
Usually does the assigned work; rarely needs reminding |
Normally does the assigned work |
Always does the assigned work without having to be
reminded. |
3 |
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Listen to other
Team mates |
Is
always talking; never allows anyone else to speak |
Usually does most of the talking; rarely allows others to speak |
Talks good; but never show interest in listening
others |
Listens,
but sometimes talk too much |
Listens
and speaks a fair amount |
2 |
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Average / Total
marks=(4+5+3+2)/4=14/4=3.5=4 |
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Note: This is only an example. Appropriate
rubrics/criteria may be devised by the concerned faculty (Course Coordinator)
for assessing the performed activity.
Note to IA
verifier: The following documents to be verified by CIE verifier at the end of
semester
1. Blue books ( 20 marks)
2.
Student suggested activities report for 5 marks
3.
Student feedback on course regarding Effectiveness of Delivery of
instructions & Assessment Method
Scheme
of Valuation for End Examination
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Serial no |
Description |
Marks |
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1 |
Part A
– CNC Turning Writing |
10 |
20 |
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Execution |
10 |
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1 |
Part B – CNC
Milling Writing |
10 |
25 |
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Execution |
15 |
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3 |
Viva |
5 |
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TOTAL |
50 |
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Sr. No. |
Resource with brief specification |
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1 |
CNC Turning
Centre (Tutor or Productive)- Minimum diameter 25 mm, Length 120 mm with ATC. (Approximate) |
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2 |
CNC
Machining Centre (Tutor or Productive)- X axis travel - 225 mm, Y axis travel - 150
mm, Z axis travel - 115 mm, With ATC.(Approximate) |
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3 |
Simulation software likes: CNC Simulator
Pro, Swansoft CNC, etc. |
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4 |
Latest version of CAD/CAM
integration software like MASTER CAM, NX CAM |
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