SECTIONING - Advanced Sections

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Advanced Sections

 

Lecture content

Advanced Sections

 

The advanced sections that will be cover are the following.

 

  • Aligned section
  • Rib and web section
  • Broken section
  • Removed section
  • Revolved section

 

Aligned Section

 

In order to include angled elements in a section, the cutting plane may be bent so that it passes through those features.

 

Conventions of Revolution

 

Features are revolved to the projection plane, and then projected over.

 

Aligned section

Lecture content

Rib and Web Section

 

To avoid a false impression of thickness and solidity, ribs and webs are not sectioned. If the cutting plane passes crosswise through the rib or web, we include section lines.

 

Rib Section

 

Lecture content

Broken Section

 

Sometimes only a partial or broken out section is needed. Hidden lines are shown in the non-sectioned area of a broken section.

 

Broken sectin

 

Removed Section

 

A removed section is one that is not in direct projection of the view containing the cutting plane.

 

Removed section

 

Lecture content

Revolved Section

 

The cross sectional shape of an object may be shown in the longitudinal view by means of a revolved section.

 

Revolved section

 

Lecture content

Non-Sectioned Parts

 

It is common practice to show standard parts 'in the round' or un-sectioned.

 

  • Nuts
  • Bolts
  • Rivets
  • Shafts
  • Screws

 

Thin Sections

 

For extremely thin parts of less than 4 mm thickness, the parts should be shown in solid black or without section lines.

 

  • Sheet metal
  • Washers
  • Gaskets

 

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