Sketching and Dimensioning Techniques

Study Notes

Sketching/Drawing/Dimensions

When object and hidden lines overlap, the object line is shown.
When hidden and center lines overlap, the hidden line is shown.
Multiple aligned holes share a center line.
Markup colors:
- Yellow: Remove
- Blue: Comments
- Red: Add
- Green: Good
Dimension types:
- Location
- Size
Dimensioning styles:
- Chain
- Baseline
Extension lines are allowed inside part geometry.
Dimension lines are typically not allowed inside part geometry.
Overall dimensions are recommended to determine material size.
Sections on drawings must be behind the cutting plane lines.
Sections can contain hidden lines where the part is cut.
Hatch linetype indicates cutting through material.
Hatch lines are not shown in thin material (e.g., spokes, ribs).
Offset sections are necessary when features are not aligned.
Half sections are used for symmetrical parts to show both inside and outside.

Auxiliary

Auxiliary views show the true size and shape of angled faces.
Most auxiliary views are partial.
Break lines for partial auxiliary views extend past an object line.
An ellipse in a regular view appears as a circle in an auxiliary view.
The reverse is also true.

Inventor Drawing

The first view in an Inventor drawing created from a 3D model is called the "base" view.
The 3D model should be open when creating a drawing.
The default border size for Inventor drawings created from 3D models is "size D".
The border size can be changed.
Use the "Annotate" menu in Inventor to create notes, center lines, and dimensions.

Sketching/Drawing/Dimensions

Object lines take precedence over hidden lines when they overlap.
Hidden lines take precedence over center lines when they overlap.
Multiple holes that align should share a center line.
Markup colors:
- Yellow: Remove
- Blue: Comments
- Red: Add
- Green: Good
There are two types of dimensions: location and size.
There are two dimensioning styles: chain and baseline.
Extension lines are allowed inside of part geometry.
Dimension lines are generally not allowed inside of part geometry.
Overall dimensions should be placed on a part to determine the required material size.
Sections on drawings must be placed behind the cutting plane lines.
Hidden lines are shown in sections where they are cut.
Hatch lines are used to indicate an object cutting through material.
Hatch lines are not shown when cutting through thin material like spokes or ribs.
Offset sections are necessary when features are not aligned.
Half sections are used for symmetrical parts to show both the inside and outside.

Auxiliary

Auxiliary views are used to show the true size and shape of an angled surface.
Most auxiliary views are partial.
For partial auxiliary views, the break line should be placed past an object line.
An ellipse in a regular view appears as a circle in an auxiliary view, and vice-versa.

Inventor Drawing

The first view in an Inventor drawing created from a 3D model is called the "base" view.
The 3D model should be open when creating a drawing.
The default border size for Inventor drawings created from 3D models is size D.
The border size can be changed.
To create notes, center lines, or dimensions in Inventor, use the "Annotate" menu.

Description

Test your knowledge on sketching, drawing conventions, and dimensioning styles. This quiz covers essential concepts including markup colors, dimension line rules, and section representations. Perfect for students in design or engineering courses.