Section Views Orthographic views showing all hidden lines
- Slides: 14
Section Views Orthographic views showing all hidden lines may not be clear enough to describe an object’s internal details. This shortcoming can be overcome by imagining that part of the object has been cut away and shown in a crosssectional view. This view is called a section view. Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 1
Type of Section Views • • • Ken Youssefi Full section view Offset section view (multiple offset views) Half section view Broken section view Aligned and Revolved section views Removed view Mechanical and Aerospace Engineering Dept. , SJSU 2
Section View – Full Section Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 3
Section View – Offset Section Offset cutting plane Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 4
Section View – Multiple Offset Sections Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 5
Section View – Half Section Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 6
Section View – Broken Section Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 7
Section View – Aligned & Revolved Section Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 8
Section View Removed sections placed outside of the view Hatch lines Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 9
Section View – review • • • All visible edges and contours behind the cutting plane should be shown. Hidden lines should be omitted in section views. A section view should always be bounded by a visible outline. There should be no lines in the hatched area. Section lines should be in the same direction. Use standard section lines (hatch) to show materials. Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 10
Breaks and Sectioning Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 11
ANSI Standard Section Lines for Various Materials ANSI-31 ANSI-133 American National Standards Institute Ken Youssefi ANSI-134 Mechanical and Aerospace Engineering Dept. , SJSU 12
Architectural Drawing Crosshatching patterns for various building materials that go into the construction of foundation, roof details, or wall sections. Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 13
Auto. CAD Crosshatching Ken Youssefi Mechanical and Aerospace Engineering Dept. , SJSU 14
- Top front and right side view
- Top view engineering drawing
- Missing view
- Name all rays
- The representation of an object on a plane surface
- Isometric machine drawing
- 3 principal views
- Multiview drawing
- 6 principal views of orthographic projection
- Viewing plane line example
- What is the precedence of lines?
- Lightly drawn line to guide drawing other lines and shapes.
- Full sectional view
- Projection of lines problems with solutions
- Projection of point in first quadrant