CAD Lab 02.docx Muhammad usama maqsood 02

Design

1. Lab Report 02
MEEN221101064Institute of Mechanical and Manufacturing Engineering
Khwaja FAREED UNIVERSITY OF eNGINEERING & iNFORMATION tECHNOLOGY, r.y.k. |

2. CAD Lab Lab 02
Lab Session 02
Objective:
Understanding of SolidWorks modeling Steps and to practice line, circle and rectangle sketch
entities with a 2D practice drawing along with dimensioning tool.
SolidWorks Modeling Steps:
The "Modeling steps" for SolidWorks CAD software involve a structured approach to
creating 2D/3D models from scratch. An outline of modeling steps for creating a 2D sketch is
given below:
1.Launch SolidWorks:
Click on the SolidWorks icon on your desktop to launch the software.
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SECTION-I
MODELING STEPS AND COMMANDS
Figure I: Solidworks Icon

3. CAD Lab Lab 02
2.Start a New Part File:
Open SolidWorks and create a new part document by selecting File > New > Part.
3.Select a Sketch Plane:
Choose a plane on which to start your 2D sketch (e.g., Front Plane, Top Plane, or Right
Plane).
Click Sketch to enter the sketch environment.
4.Create a 2D Sketch:
Use sketch tools (e.g., Line, Circle, Rectangle) to draw the desired 2D shapes.
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Figure II: Opening a new file
Figure III: Planes

4. CAD Lab Lab 02
Ensure that your sketch is fully defined with proper constraints (e.g., vertical, horizontal) and
relations.
5.Dimension the Sketch:
Use the Smart Dimension tool to add precise measurements to your sketch entities.
Adjust dimensions as needed to match your design specifications.
6.Add Sketch Relations:
Apply sketch relations (e.g., coincident, parallel, equal) to constrain your sketch fully and
maintain geometric integrity.
Line Command:
A detailed outline of “Line” command is given below:
Position in the Command Menu:
Menu Bar: Tools > Sketch Entities > Line
Command Manager: In the Sketch tab, the Line tool is prominently displayed when
you are in sketch mode.
Right-Click Menu: While in a sketch, you can right-click in the graphics area and
select Line from the context toolbar.
Shortcut: Pressing L on the keyboard while in sketch mode will activate the Line
command.
Use and Functionality:
The Line Sketch command
is used to create straight line
segments as part of a 2D sketch, which can be used for creating profiles and geometry
to generate 3D features such as extrusions or cuts.
You can draw single lines or chain multiple connected line segments in a single
operation.
Line segments can be set to snap to specific angles (e.g., horizontal, vertical, or at
increments set in the sketch snapping options).
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Figure IV: Line command in Command Toolbar

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Types of Line Sketches:
Single Line: Click once to start the line, move to your desired endpoint, and click
again to place the line.
Chain Mode: Click, draw the line to the endpoint, and then continue drawing
connected lines. To exit the chain mode, double-click or press Escape.
Properties and Options:
Properties Panel: Once a line is drawn, you can adjust its properties by selecting it
and modifying values such as:
Length: Set or adjust the exact length of the line.
Angle: Specify the angle relative to a reference axis.
Relationships: SolidWorks automatically assigns geometric relationships (e.g.,
horizontal, vertical, coincident) during line creation. You can manually add or adjust
relationships like Midpoint or Collinear as needed.
Sketch Relations Display: Any added relations (e.g., horizontal, parallel) are shown
as symbols near the line.
Circle Command:
An overview of “circle” command is given below:

Position in the Command Menu:
Menu Location: The Circle command is found under “Sketch” in the command
manager.
Toolbar Access: Available in the Sketch toolbar when you are in sketch mode.
Keyboard Shortcut: Press the “C” key to quickly activate the Circle tool.
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Figure V: Line Relationships

6. CAD Lab Lab 02
Right-Click Context Menu: When sketching, right-clicking the workspace will
display the Circle option for easy access.
Use of the Circle
Command:
The Circle command is used for sketching circular shapes that can serve as the basis for
creating round features or cuts in 3D models. It’s a fundamental tool in sketching and allows
for:
Defining Circular Profiles: Perfect for sketches that require round features such as
holes, cylinders, or bosses.
Creating Construction Circles: Can be set as reference geometry to aid in
positioning other sketch elements.
Types of Circle Options:
SolidWorks provides two types of circles that you can use, depending on your design needs:
Center-point Circle: The default circle type where you select a center point and drag
outward to define the radius.
Perimeter Circle: Allows you to define a circle by selecting three points on its
circumference. This option is useful when positioning a circle to pass through specific
points.
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Figure VI: Circle command in Command Toolbar
Figure VII: Types of Circles

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Properties and Parameters:
Dynamic Input: As you draw, you will see the radius or diameter value displayed
dynamically, which can be adjusted by typing in specific values before placing the
circle.
Sketch Relations: Automatically creates relations such as Tangent, Concentric, or
Coincident when connected to existing geometry.
Modifiable Properties: After placement, you can use the Property Manager to
adjust the circle’s diameter or radius and add or modify sketch relations.
For Construction Option: Circles can be converted to construction circles (dashed
lines) by right-clicking and selecting “For Construction,” helpful for reference
geometry.
Contextual Usability:
Adding Dimensions: You can use the Smart Dimension tool to dimension the circle,
specifying either its diameter or radius.
Editing and Moving: Once placed, circles can be edited by dragging their center
point or perimeter. For precise control, you can double-click the circle to enter
dimension values directly.
Connecting with Other Entities: The circle can be constrained with sketch relations
like Tangent (to a line), Coincident (to a point), or Equal (to another circle).
Property Manager Details:
Diameter/Radius Specification: The Property Manager allows precise entry of
values for the circle’s size.
Geometric Constraints: Options to apply or remove automatic sketch relations for
more control over design intent.
Display Settings: Adjust the appearance of the circle, such as toggling construction
status or changing its color and line type (useful in complex sketches).
Rectangle Command:
Here is an overview of the “rectangle’ command:
Position in Command Menu:
Main Menu Path: Go to "Sketch" > "Rectangle".
Toolbar Location: Found in the "Sketch" tab of the Command Manager when a
sketch is active.
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8. CAD Lab Lab 02
Types of Rectangles Available:
When you select the Rectangle command, you have multiple types to choose from:
Corner Rectangle: Defined by selecting two diagonal corner points.
Center Rectangle: Starts from the center point and grows outward symmetrically.
3 Point Corner Rectangle: Allows creation by selecting three points, giving
flexibility in defining angles.
3 Point Center Rectangle: Defined by a center point and additional points that allow
angle control.
Parallelogram: Creates a four-sided shape where opposite sides are parallel but not
necessarily perpendicular.
Steps to Use:
Open or create a new sketch on a plane or planar face.
Select the Rectangle tool from the Sketch tab or use the menu path mentioned above.
Choose the type of rectangle from the options available.
Click to place the points defining the rectangle in the sketch area.
Set the dimensions using Smart Dimension or modify the properties in the Property
Manager.
Properties of the Rectangle:
Geometric Relations:
SolidWorks automatically applies relations such as horizontal and vertical
constraints to ensure the rectangle remains orthogonal or adjusts as defined.
Editable Properties:
Dimensions can be added or edited using Smart Dimension.
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Figure VIII: Types of Rectangles

9. CAD Lab Lab 02
Relations (e.g., equal, perpendicular) can be modified through the Display/Delete
Relations tool.
Modifying a Rectangle:
You can adjust the size and shape by dragging its corners or by modifying the
dimension values.
Apply constraints like fixed, symmetric, or equal length to lock or control the
rectangle’s behavior within the sketch.
2D practice Drawing:
The following is the procedure to make a practice 2D drawing using line, circle and rectangle
commands:
1.Go to File > New > Part
2.Click on Sketch in menu bar
3.Select a plane for the drawing; Front plane
4.Go to Sketch > Rectangle > Corner Rectangle and draw a rectangle with given
dimensions by making the origin as starting point.
5. Now,
draw two
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SECTION-II
PRACTICE DRAWING
Figure IX: Base Rectangle

10. CAD Lab Lab 02
more rectangles inside the first rectangle with starting points located at the corner of
first rectangle and on opposite side of origin face with given dimensions.
6.Draw a diagonal line in both of the small rectangles.
7.Use the Power Trim command to remove the extra lines of the small rectangles or
simply delete the unnecessary lines by selecting them and pressing Delete.
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Figure X: Two small rectangles at top with diagonals

11. CAD Lab Lab 02
8.Go to Sketch > Line
vacant space in geometry.
9.Delete the extra lines to get the desired shape.
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Figure XI: Trimmed/Deleted sketch
Figure XII: Line command in use

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10.Select Sketch > Line > Centerline and draw 2 centerlines to specify the center of
circle.
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Figure XIII: Trimmed sketch
Figure XIV: Circle center specify with centerline

13. CAD Lab Lab 02
11.Go to Sketch > Circle and draw a circle with center specified by centerlines.
12.Delete the extra entities and use the dimensioning tool to Fully Define your sketch.
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Figure XV: Final Fully Defined sketch