Computer Aided Design
Introduction
CAD (Computer Aided Design) is the use of computer software to design and document a product’s design process. Engineering drawing entails the use of graphical symbols such as points, lines, curves, planes and shapes. Essentially, it gives detailed description about any component in a graphical form.
• CAD is used to accomplish preliminary design and layouts, design details and calculations, creating 3-D models, creating and releasing drawings, as well as interfacing with analysis, marketing, manufacturing, and end-user personnel.
CAD software enables
• Efficiency in the quality of design
•Increase in the Engineer’s productivity
•Improve record keeping through better documentation and communication
Types of CAD Software
CAD or Computer Aided Design software was introduced in the late 1960's to expedite engineering drawing process. While CAD is used mainly in engineering drawing and construction architecture, it can also used for other purposes.
There are various flavours of CAD available today and there are different methods of classifying them.
• Raster 2D Design
• Vector 2D Design
• 3D Design
• Animation
• Rendering, Simulation
Raster 2D Design
It is a dot matrix data structure which represent reactangular grid of pixels. Ratser image save in image file with different format. To draw the raster 2D design I have used KRITA and GIMP
1. KRITA Software
KRITA is a open source painting software. It is used for concept art, texture and matte painters,
illustrations and comics purpose. It is also used for digital painting and animation purpose.

2. GIMP Software
It is a GNU Image Manipulation Program. It is used for photo retouching, image composition and image authoring. I have installed GIMP 2.10.14 software. Here i have editing the picture of my sister by using ajust color curve, brightness and contrast, hue saturation command.
Before

After

Vector 2D Design
It is defined in terms of 2D points, which are connected by lines and curves to form polygons and other shapes. Each point has a defined position on x axis and y axis of the work plane.Coreldraw, Inkscape,FreeCAD such software is used for vector 2D design. In this assignment. I have tried all this for to draw given diagram.
1.Coreldraw Software
It is a vector graphics editor developed and marked by Corel Corportion. It is used for
• New non-destructive effect for bitmap and vector object
• To control object, layers and pages
• To improve pixel workflow for pixel perfect documents
I have develop the front view, top view and side view of my project sketch using Coreldraw.

2. Inkscape Software
It is a professional vector graphics editor. Inkscape is free and open source software.
It is generally used for illustrations, icons, logos, diagrams,maps and web graphics.
Here I have created 3D design to shows the 3D looks of my project sketch.

3D Design
The product has three dimension i.e. height, width and depth. 3D modelling is th process
of creating a 3D representation of any surface or object by using polygons, edges and vertices in simulated 3D spaces.
In 3D modelling movies animations and video gamesalso created.
Different tools are used for 3D design. In this assignment
I have tried to develop my project 3D model using FreeCAD and Solidwork.
1. FreeCAD Software
FreeCAD is a multiplatform (i.e. Windows, Mac OS and Linux platform) and it is open source software.
It is general purpose 3D CAD modelling applications made for to design real life object
Parametric modelling ia a type of modelling where the shapes of the 3D object are controlled by parameters. This parameter has been modified
at any times even after the object has been created.
Here i have created metal sheet final shape required in project

The following image shows the shape of M.S. frame required for project

The parametric design using spredsheet is created in FreeCAD which shown in image below

2. Solidworks Software
The SOLIDWORKS CAD software is used for mechanical design automation application that lets
designers quickly sketch out ideas, experiment with features and dimensions, and produce models and detailed drawings.
SolidWorks allows users to create, simulate, publish, and manage 3D models. The technology intends
to make engineering processes more efficient with tools for conceptual design, product layout, strength and dynamics analysis, and more.
Here i have tried to develop 3D model from the given isometric sketch.

The following 3D model developed by using Solidworks software from above
given skecth
Chamfering on Pad by using Chanfer Command