Week02

Assignment: Computer-Aided Design

Software used: Solidworks

What is Computer-Aided Design?

For generations, hand-drawn engineering drawings served as the language of engineering, facilitating communication among designers, manufacturers, and quality inspectors. With the advent of computers and their increasing capabilities, design engineers began leveraging design software to create virtual 2D and 3D models. These models enable the design of individual parts, their assembly into mechanisms, and the generation of final engineering drawings essential for manufacturing.

Hand Drawn	CAD Software

Images - pinterest.com

Computer-Aided Design Softwares

2D - AutoCAD by AutoDESK	3D - FreeCAD - Opensource	3D - Solidworks by Dassault Systems
3D - Creo by PTC	3D - CATIA by Dassault Systems	3D - NX CAD by Siemens

Short History of Solidworks

SolidWorks, a 3D CAD tool, was developed by MIT graduate Jon Hirschtick in 1993 with the goal of creating a user-friendly and cost-effective CAD program for Windows. The first product, SolidWorks 95, was released in 1995. In 1997, the French software company Dassault Systèmes acquired SolidWorks and now offers a range of CAD tools.(Source : Wikipedia)

Concept Design Problem Statement

Design of a compliant mechanism clothespin, minimizing part count, suitable for 3D printing, and optimized for mass production via plastic injection molding.

Compliant Mechanism

The compliant mechanism is a type of mechanism system that can achieve motion and force transmission through flexible members. Using CM concept a single-piece flexible system can replace multiple parts and assembly. A more simplified version of a mechanism can effectively reduce the system's weight, be easy to manufacture, and be cost-effective.

To Know more about Compliant Mechanism - NPTL Link

Simple Switch	Walking Mechanism	Satellite Application

Source: Brigham Young University CMR

Conventional Clothespin:

Traditional clothespin consist of multiple components, including two prongs and a metal spring. The complex design of the prongs, necessary for both connection and the central hinging action, complicates the injection mold tooling and necessitates an assembly line for final product construction.

My Design Concept:

Inspired by the 19th-century one-piece wooden peg patented by Jeremie Victor Opdebec. A wedge-shaped two prongs which can squeeze the cloths in between. Source: Wikipedia

SolidWorks Design steps:

Features Used	Image
Sketch
Extrude
Extrude Cut
Fillet
Steps in Design
Finite Element Analysis Simulation

Model link

Cloth Clip Compliant Mechanism by charath on Sketchfab

Model Download Link

3D Printed using FDM machine and PLA material

3D Model Download Link: Link

Example 2 for Compliant Mechanism

Wheel design for RC Car model with self-shock absorption

Model link

RC Wheel Complaint Mechanism by charath on Sketchfab

Model Download Link

Assignment - 3D - Blender

For creating organic models using Blender

Blender! It's more than just a piece of software; it's a vibrant, open-source powerhouse in the world of 3D creation. Imagine a digital workshop brimming with tools for sculpting, modeling, animating, simulating physics, rendering photorealistic images, and even video editing and compositing – all within a single, freely available package.

Think of it as the Swiss Army Knife for artists, designers, scientists, and hobbyists alike. Whether you're crafting stunning visual effects for a film, designing a new product, creating intricate game assets, or simply exploring the fascinating world of 3D, Blender offers a comprehensive and incredibly versatile platform to bring your ideas to life. Its active and supportive community further enriches the experience, providing a wealth of tutorials, resources, and collaborative spirit. It's a journey of continuous learning and boundless creative potential.

With Blender, I tried to create an organic model

Open Blender, start a new file

You will find a cube at the center of the screen

To convert the cube into a sphere use “Add Modifier” command

Add - Subdivision Surface

Add Values in Subdivision Surface

Levels Vector = 5

Render = 5

(experiment with the values)

In “add modifier” select “cast”

From “Add Modifier” select “Decimate”

In decimate change, the angle limitis set to 20 degrees, you can experiment with the angle values to form different shapes. Dont forget to select “All Boundries”

To smooth the edges select the “Subdivision surface”

You can export the model to any format from the file->export option

*.STL file for 3D printing.

Blender Models Download Link : Link

Assignment - 2d - Vector imagesw02

For creating vector images using CorelDraw

CorelDRAW is a vector graphics editor used for creating and editing images. It is developed and marketed by Corel Corporation. CorelDRAW is used for a wide variety of graphic design purposes, including logo design, illustration, page layout, and web design.

CorelDRAW was first released in 1989 and has since gone through many versions. The latest version, CorelDRAW 2021, was released in March 2021. CorelDRAW is available for Windows and macOS operating systems.

Assignment to create a vector image to print in a T-Shirt

CorelDraw Screen