MECHANICAL COMPUTER AIDED DRAFTING (MCAD) | Tutorial and practice | Diploma



Course

Title:

MECHANICAL

COMPUTER

AIDED

DRAFTING (MCAD)

Scheme (L:T:P) : 0:2:4

Total Contact Hours: 78

Course Code:

15ME35P

Type of Course: Tutorial and practice

Credit :03

Core/ Elective:

Core(practice)

CIE- 25 Marks

SEE- 50 Marks

 

Prerequisites: Basic computer Skills and Practice concepts of Machine drawing

 

 Course Objectives:                                                                                                     

 

1.     Now a day a manual drafting is obsolete in industry. Computers being the inevitable part in an engineer’s life due to its inbuilt characteristics which helps him to do various task with acceleration.

2.     Using computers and CAD software it is easy to create and modify drawings ultimately it saves time. It also may be useful to generate assembly and manufacturing drawings.

3.     In mechanical industry operating skills are required for computer aided drafting operations of machine components, handling of printers & plotters. This subject is also useful to apply concepts in 3 D modeling.

 

On successful completion of the course, the students will be able to:

 

Course Outcome

CL

Linked excises

Linked PO

Teaching Hrs

CO1

Interpret and Draw, edit and modify 2D

U/A

Basics

1,2,3,9,10

08

CO2

Give dimensions, tolerances and geometrical tolerances

U/A

Basic

commands

1,2,3,9,10

08

CO3

Create Isometric 2D Views and 3D drawing ,when orthographic views of simple machine parts/Threaded fasteners /Riveted Joints

U/A

Models from question bank (Sl.no

01 to 16)

1,2,3,9,10

18

CO4

Plot Assembly 2D drawings and

Create their respective 3D Assembled views

U/A

Part drawings from question bank (Sl.no

01 to 05)

1,2,3,9,10

44

 

 

 

Total

sessions

78

Legend: U- Understand       A- Application


COURSE-PO ATTAINMENT MATRIX

 

Course

Programme Outcomes

1

2

3

4

5

6

7

8

9

10

MECHANICAL COMPUTER AIDED

DRAFTING (MCAD)

 

03

 

03

 

03

 

-

 

-

 

-

 

-

 

-

 

03

 

03

 

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.

 

 

COURSE CONTENT

 

Unit No

 

Unit Name

Hour

Questions to be set for (10marks ) PART - A

Questions to be set for (40marks) PART - B

Marks weightage (%)

1

CAD COMMANDS

FAMILIARIZATION

08

-----

------

-

2

PRACTICE ON COMMANDS

08

01

----

17

3

CREATION OF 3D MODELS

/THREADED FASTENERS/ RIVETED JOINTS

 

18

01

-----

17

4

DETAILS TO ASSEMBLY

44

----

01(*)

66

 

Total

78

02

01

100

Note: (*): Compulsory Question to be asked in end exam

Text Box: UNITI: CAD COMMANDS FAMILIARIZATION	08Hrs

 

Introduction to MCAD(parametric modelling) software-Understanding parametric modelling technique, knowing the software interface, co-ordinate systems supported- Planes and their creation, reference axis, Sketch, Profile, constraints-geometrical and dimensional, need for constraining, fully constrained, under constrained, over constrained.


Text Box: UNTII: PRACTICE ON COMMANDS	08Hrs


 

Practice 2D and 3D drawing commands

 Hands on Exercises.

Create2DDrawing  for   the   ISOMETRIC  OBJECT   given by  selecting                                                               from model question bank

Create       3D   Drawings for the ORTHOGRAPHIC VIEWS given by selecting   from model question bank

Text Box: UNIT III: ASSEMBLY	MODELING	44Hrs


Know the assembly environment, setting the assembly environment, types of assembly  design approach-bottom-up and top-down assembly. Creating assembly Editing and modifying assembly relationships -Creating exploded view of the assembly –Create 3DAssemblymodels of- Socket and Spigot type Cotter Joint-Knuckle joint—Plummer Block- Screw Jack

 UNIT IV:MODELS BY USING EQUESTIONS                                                                                                          18Hrs

 

Hexagonal nut and bolt, Solid muff coupling and journal bearing

 

®TEXT BOOKS

1.     Sham Tickoo- Autocad: A Problem-Solving Approach Thomson Learning EMEA, Limited

2.     Machine Drawing- K.R.Gopala Krishna Subhas Publications Bangalore

3.     George Omura- Mastering Auto CAD BPB Publication

4.     T Jeyapoovan- Engineering Graphics Using AutoCAD Vikas Publishing House Pvt. Ltd. Fifth Edition

REFERENCES

1.     Machine Drawing- N.D.Bhatt, Charotar Publication, Anand

2.     Machine Drawing-Sidheshwar-Tata McGraw Hill

3.     Code of practice for general engineering-IS Code SP 46(1988)- Engineering Drawing Practice for School and colleges

4.     Production Drawing-L.K.Narayanan,P.Kannaich,- New Age International Publication

 

 SUGGESTED LEARNING WEB SITES                                                                                                     

http://www.we-r-here.com/cad/tutorials/index.htm http://www.cadtutor.net/tutorials/autocad/

http://www.caddprimer.com/AutoCAD_training_tutorial/AutoCAD_training_lessons.htm http://www.autocadmark.com/

http://www.autocadtutorials.net/

 

 SUGGESTED LIST OF STUDENT ACTIVITYS                                                                                                     

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

 

1

Bring actual industrial production drawings from nearby industry and distribute them among group of students for self study and interpretation. Ask students to practice these

drawings using any modeling software.

2

Bring small real components like Nut-Bolt, Washers, Cotter-knuckle Joints, Couplings, and Pulleys in the class. Ask students to use Vernier caliper to measure the dimensions and formulate relations between them. Practice same relations with AutoCAD/Pro-E

software/Solid edge/catia to draw 2D/3D models of these components.

3

Take the students for industrial visit. Hands-on practice with drafting software to create a

production drawing of an assembly.


 

 Course Delivery:                                                                                                     

The course will be delivered through lectures and Demonstration and CAD practices. This Lab can be performed using ANY ONE of the following software’s:

1)          Solid edge

2)          Iron CAD

3)          CATIA

4)          ProE

5)          Solid Works

6)          INVENTOR

7)          Any equivalent or open source software’s

Course Assessment and Evaluation Scheme:

 

 

What

To whom

When/Where (Frequency     in the course)

Max Marks

Evidence collected

Course outcomes

 

 

CIE

IA

Students

Student

activities

10

CAD drawing

1,2,3,4

Record- Average marks of all graded exercises

to be computed.

15

CAD exercises

1,2,3,4

SEE

End

Exam

End

course

of

the

50

Answer

at BTE

scripts

1,2,3,4

 

 

 

Student Feedback

on course

Students

Middle

course

of

the

 

Feedback forms

1,2,3 Delivery

of course

End     of           Course Survey

End

course

of

the

 

Questionnaires

1,2,3, 4

Effectiveness of Delivery of instructions & Assessment Methods

 

*CIE – Continuous Internal Evaluation         *SEE – Semester End Examination

Note:

1. Rubrics to be devised appropriately by the concerned faculty to assess Student activities.

 

 

 

 

 

 

 

 

 

 

 

 

 

å    MODEL OF RUBRICS /CRITERIA FOR ASSESSING STUDENT ACTIVITY


RUBRICS MODEL

 

RUBRICS FOR ACTIVITY( 10 Marks)

 

Dimension

Unsatisfactory

Developing

Satisfactory

Good

Exemplary

Student Score

2

4

6

8

10

 

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

Fulfil 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

 

 

6

 

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.

 

 

8

 

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

 

 

8

Average / Total marks=(4+6+8+8)/4=26/4=6.5=7

 

Note: This is only an example. Appropriate rubrics/criteria may be devised by the concerned faculty (Course Coordinator) for assessing the given activity.

 

Questions for CIE and SEE will be designed to evaluate the various educational components (Bloom’s taxonomy) such as:

Sl. No

Bloom’s Category

% Weightage

1

Understanding

45

2

Applying the knowledge acquired from

40

3

Analysis

05

4

Evaluation& Creating new knowledge

10

Note to IA verifier: The following documents to be verified by CIE verifier at the end of semester

1.     Student suggested activities report for 10 marks

2.     Student feedback on course regarding Effectiveness of Delivery of instructions & Assessment Methods.


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