Section views

1

Section Views

ME 123 Visualization and CAD Full Section

Front view Right side view in Full Section

Left side view

Hard to visualize. Compare with right side in section for readability

General Guidelines

• Use section lines to indicate “cut” material• Show all edges, not just “cut” material• No hidden lines except as needed for feature• Use object lines, not hidden lines, to outline

“cut” material• Section lines same direction on each part• Cutting plane line in adjacent view• Section lines normally at 45o

Lines in Sectioning

(a) (e)(d)(c)(b)CORRECT INCORRECTINCORRECTINCORRECT

Hidden Lines in Section Views

(A) (B)

Direction of Section Lines

INCORRECTCORRECT INCORRECT

Normaly the section lines are at 45 degrees, but not if a feature of the part is at 45 degrees.

2

Section Hatch

Two Parts

Section lines at varying angles for different parts

Same part, same angle

Three Parts

Section Types

• Full• Offset• Half

• Removed• Revolved• Aligned

• Broken-Out

Full Section

Edge View of Cutting Plane

Top ViewCutting Plane

Line of Sight

Front View

Section Lines

Return to Section Types

Animation

Offset Section

Offset Line Not Shown

Top ViewRemoved Portion

Front View

Offset

Return to Section Types

Half Section

Remove One Quarter

Center Line(Hidden lines omitted unless used for dimensioning

Edge View of Cutting Plane

Cutting Plane

Return to Section Types

Removed Section

B

A

A

Section A-A

B

Return to Section Types

3

Revolved Section

Broken Around Section

Section in View

Revolved 90o

Front View

Top View

Pictorial View

Return to Section Types

Aligned Section

Section D-D

D

D

Return to Section Types

Broken-Out Portion

Cutting Plane

Break Line

Front View with Broken-Out Section

Broken-Out Section

Return to Section Types

Webs in Section

B B

A

A

(a) CORRECT (b) INCORRECT

(c) CORRECT

Full Section Example Half Section Example

4

Offset Section Example

The holes go through