D and D Design - Engineering Design - ثالث ثانوي
1. Principles of Engineering Design
2. Design and Prototyping
2D and 3D Design
Comparing 2D and 3D Drawings
Examples of 2D shapes
Examples of 3D shapes
In engineering, 2D and 3D shapes refer to the number of dimensions that a shape or an object has
Introduction to FreeCAD
Workbenches
Transforming 2D Shapes into 3D Models
Padding creates a 3D shape with constant thickness from a 2D shape, while extrusion creates a 3D shape with variable thickness from a 2D shape by stretching it along an axis
Creating a 2D Shape
Creating a new document and Selecting the "Part Design" workbench
Creating a Body
Planes
There is a plane called the user-defined plane that is created by the user and allows you to create a reference surface at any location and orientation within the 3D space vector.
Let's take a look at some examples to achieve a better understanding of planes in FreeCAD
choose a plane
The Grid
Sketcher Workbench
create a rectangle
Object Constraints
Degrees of Freedom (DoF)
constrain horizontal distance
make the sides equal
Fully constrained shape
A fully constrained square indicates that the shape is ready to be used as a base for further operations, like creating a 3D shape by extrusion or using it as a reference for other shapes or
The Model tab
Creating a 3D Shape
Creating a 3D shape
3D Views
The Navigation Cube can be helpful when working on a complex model and you need to see it from different perspectives to make adjustments or check for errors.
Read the sentences and tick True or False 2D drawings are used to convey information about a design in a precise and clear way
Explain the purpose and use of the Constrain coincident tool
Choose the correct answer below Which tool can be used to constrain a corner of a square to the intersection of the axes
Explain the difference between the "Constrain coincident" and "Constrain point onto object" tools.
Explain the purpose of the "Constrain horizontal distance" and "Constrain vertical distance" tools.
Describe the process of creating a 3D shape using the padding technique.
Use the Create line tool to create a line of unit length 100 and fully constrain it
Create a fully constrained rectangle with long sides with lengths of 80 mm and short sides with lengths of 20 mm. Then use the Pad tool to pad the rectangle to have a height of 30 mm.
