PLACEMENT EMPOWERMENT PROGRAM CAD & 3D PRINTING LAB

Co-ordinator of the lab

Dr. Vaddi Seshagiri Rao
Professor & Principal
St. Joseph’s College of Engineering, Chennai

Lab Incharges

Mr. N. Sathishkumar
Assistant Professor
Department of Mechanical Engineering
St. Joseph’s College of Engineering, Chennai

Dr. N. Thangapandian
Assistant Professor
Department of Mechanical Engineering
St. Joseph’s Institute of Technology, Chennai

Vision of the Lab

Equip the students to become professionals in 2D and 3D modeling packages which is further incorporated in creation of various complex shaped parts by using 3D Printing process.

Objectives of the Lab

Overview of the Lab

Computer Aided Design:

CAD programs (AutoCAD, Inventor, Revit, CATIA, SolidWorks, SketchUp) allow engineers to make precisely scaled drawings. These drawings can be used to manufacture equipment and construct infrastructure. CAD drawing allows designers to display designs with complete specifications and detail. Orthographic views (top, bottom, side, front, back, etc.) can be used to document every aspect of the technical drawing needed for production. Isometric views can be used to interpret the final 3D representation of the product.

This lab will train the components of CAD software, file formats, and the basics of 3D drafting. It will provide enough information to learn how to create drawings, as well as explore the other tools and functions.

3D Printing:

3D printing or additive manufacturing is the construction of a three-dimensional object from a CAD model or a digital 3D model. It can be done in a variety of processes in which material is deposited, joined or solidified under computer control, with material being added together (such as plastics, liquids or powder grains being fused), typically layer by layer.

The various additive manufacturing techniques are as follows

This lab will cover two types of additive manufacturing techniques

1. Materials Based – Fused Deposition Modeling

2. Vat Polymerization – Stereo lithography

Fused Deposition Modeling also known as Fused Filament Fabrication is an additive manufacturing process that contains a plastic filament or metal wire which is unwound from a coil and supplies material to an extrusion nozzle which can turn the flow on and off. The nozzle is heated to melt the material and can be moved in both horizontal and vertical directions by a numerically controlled mechanism. The model or part is produced by extruding small beads of thermoplastic material to form layers as the material hardens immediately after extrusion from the nozzle. The schematic diagram of fused deposition modeling is shown below. Stereo lithography is an additive manufacturing process which employs a vat of liquid ultraviolet curable photopolymer resin and an ultraviolet laser to build part layers one at a time. For each layer, the laser beam traces a cross-section of the part pattern on the surface of the liquid resin. Exposure to the ultraviolet laser light cures and solidifies the pattern traced on the resin and joins it to the layer below. Scanning speeds ~ 500 to 2500 mm/s. Thinner layers provide better resolution and more intricate shapes; but processing time is longer. Starting materials are liquid monomers epoxies, acrylates (brittle). The following figure shows the schematic diagram of stereo lithography process at the start of the process, in which the initial layer is added to the platform and after several layers have been added so that the part geometry gradually takes form.

Course Outcomes

Required

S. No.	Description	Hours	Knowledge Level
CO 1	To understand the basics of 2D modelling through Auto Cad software.	20	Understand Apply Create
CO 2	To understand the basics of 3D modelling through CATIA/SOLIDWORKS software.	20	Understand Apply Create
CO 3	To implement the basics of 2D and 3D modelling software for creating complex shaped parts through 3D printing Process.	20	Understand Apply Create

S.no	2D Modelling (Theory and Practice)
1.	Study Of Drawing Standards
2.	Fits & Tolerances
3.	Sectional Views, Hatching,
4.	Dimensioning, Units, Scale.
5.	Introduction to CAD
6.	Wireframe modelling
7.	Surface modelling
8.	Synthetic curves, non-Uniform rational B splines, Fractal curves
9.	Introduction To 2D Drafting Software (Auto CAD)-Limits
10.	Auto CAD – BASICS
11.	Layout And Sketching
12.	Layer, Selection Methods, Osnap, Plotting
13.	Drawing Environment
14.	Elements Of Drawing
15.	Draw Commands
16.	Autolisp programming in Auto cad software
17.	2D – drawings for practice using Auto cad software
18.	Isometric drawings for practice using Auto cad software
19.	3D modelling using Auto CAD
20.	Allotment and Evaluation of Design Projects
	3D Modelling (Theory & Practice)
1.	Parametric modelling
2.	2 ½D Modelling
3.	First angle & Third angle Projection
4.	Solid modelling techniques
5.	CSG, B-rep, Sweep representations
6.	Various CAD standards and file formats
7.	Introduction of 3D Modelling software’s
8.	Introduction To Catia V5
9.	The sketcher workbench
10.	Profile toolbar
11.	Operation toolbar
12.	Sketch toolbar
13.	Constraint toolbar
14.	User selection filter toolbar
15.	Visualization toolbar
16.	Tools toolbar
17.	Assembly Drawing
18.	Overview of various other 3D modelling packages
19.	Practice on CATIA V5
20.	Allotment and Evaluation of Design Projects
	3D Printing (Theory & Practice)
1.	Need and Development of Additive Manufacturing systems
2.	Additive Manufacturing process chain
3.	Impact of Additive Manufacturing on Product Development
4.	Virtual Prototyping & Rapid Tooling
5.	Binder Jetting
6.	Direct Energy Deposition
7.	Material Extrusion
8.	Material Jetting
9.	Powder Bed Fusion
10.	Sheet Lamination
11.	VAT polymerization
12.	Benefits & Applications of Additive Manufacturing
13.	Introduction to Reverse Engineering
14.	Digitization techniques
15.	Model reconstruction & Data formats
16.	Data interfacing, Part orientation and support generation
17.	Support structure design & Model Slicing
18.	Tool path generation & Software’s for Additive Manufacturing
19.	Hands on training in 3D printers (FDM & SLA)
20.	Allotment and Evaluation of 3D Printing Projects
	Additional tasks followed along with syllabus
1.	Alumni and industrial mentors based mock interview
2.	Expert alumni talk & Guest Lectures from industrial experts
3.	In house workshops for practical training
4.	Certification Courses in CAD and 3D Printing
5.	Internship in reputed companies related to CAD &3D Printing
6.	Consultancy Projects in CAD & 3D Printing
7.	Filing design patents
8.	Publishing journal papers in CAD & 3D Printing
9.	Industrial visits to reputed CAD & 3D Printing labs
10.	Ideation support for startup activities

CAD & 3D PRINTING -STUDENT NAME LSIT
S.no	Student Name	Reg No	College	Department
1	ANUPRIYA C	312321103005	SJCE	CIVIL
2	SANTHOSH S	312321103044	SJCE	CIVIL
3	SHAKTHI RAVIKUMAR	312321103047	SJCE	CIVIL
4	SRINIVASAN M	312321103051	SJCE	CIVIL
5	SATHISH KUMAR P	312321103045	SJCE	CIVIL
6	MADHUSUDHANAN S	312321103023	SJCE	CIVIL
7	LOGESH C	312321103021	SJCE	CIVIL
8	NAVEEN S	312321103030	SJCE	CIVIL
9	PRAGATESH KUMAR A L	312321103033	SJCE	CIVIL
10	ASHWIN KANAKASAPAY	312321103007	SJCE	CIVIL
11	VARSHINI R V	312321103055	SJCE	CIVIL
12	JESSICA PREETHI B	312321103015	SJCE	CIVIL
13	ISHANA MOHAN	312321103013	SJCE	CIVIL
14	SAAYA SREE S	312321103040	SJCE	CIVIL
15	SAN SERIN P	312321103043	SJCE	CIVIL
16	NAVYA I V	312321103031	SJCE	CIVIL
17	SIVARANJANI D	312321103049	SJCE	CIVIL
18	SANJAI SRIRAM K	312321114116	SJCE	MECH
19	SIVASUBRAMANIYAN A	312321114127	SJCE	MECH
20	SREE HARISH M V	312321114129	SJCE	MECH
21	SRIRAM KARTHICK	312321114130	SJCE	MECH
22	SUBRAMANIYAN V	312321114131	SJCE	MECH
23	SANTHOSH KUMAR C	312321114119	SJCE	MECH
24	IRUTHAYA AGASTIN S	312321114306	SJCE	MECH
25	THAMIZHSELVAN S	312321114143	SJCE	MECH
26	IMAYAVARAMBAN A	312321114050	SJCE	MECH
27	AMIRDHAVARSHINI U	312321114014	SJCE	MECH
28	HARINI JV	312321114046	SJCE	MECH
29	ABISHEK N	312321114004	SJCE	MECH
30	THIRUMALAI KUMARAN S	312321114146	SJCE	MECH
31	BARATH G	312421114011	SJIT	MECH
32	SHARFARASH AHAMED	312421114307	SJIT	MECH
33	GAYATHRI K.	312321203012	SJCE	CHEM
34	KAVYA S	312321203022	SJCE	CHEM
35	LINGA DHARANI V	312321203027	SJCE	CHEM
36	MYSTERY PEARLY J	312321203030	SJCE	CHEM
37	PADMASRI M N	312321203033	SJCE	CHEM
38	PRADEEPA K	312321203034	SJCE	CHEM
39	SAKTHIVEL A	312321203043	SJCE	CHEM
40	SUBHASHINI K	312321203053	SJCE	CHEM
41	K U UDAYASHAMINI	312321203058	SJCE	CHEM
42	VIJAIDEESHMA V	312321203061	SJCE	CHEM
43	GANESAN V	312321203011	SJCE	CHEM

Academic Partnerships: