Unit 13 Sectional Views Objectives Explain the terms

Unit 13 Sectional Views

Objectives • Explain the terms sectional view, cutting-plane line, and section lines. • Identify various section lines. • Complete various sectional views. • Identify sectional views such as full, offset, half, revolved, removed, and broken-out. • A section view of an object is created by the imaginary cutting of its front portion to reveal the interior. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Sectional Views • Views created by removing a portion of the part. • This drawing tool helps the user understand complex or confusing features. • May serve as one of the views. principal Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Sectional Views • Section views are created by passing an imaginary cutting plane through the part. This Photo by Unknown Author is licensed under CC BY-SA-NC Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Sectional Views • May serve as one of the principal views - front, top, or side – or it can be used as an additional view. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Cutting-Plane Line • The cutting-plane line is a heavy line. • Arrowheads point in direction of viewing sight • Letters match line to view Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Arrows – Direction of View • Arrowheads point in direction of viewing sight. • Letters match line to view Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Cutting-Plane Line • Indicates location of cutting plane • Arrowheads point in direction of viewing sight • Letters match line to view Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Cutting-Plane Line • Examples of cutting-plane lines are at the top of pg. 217. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Sectional Views • Views created by removing the front portion • Imaginary plane cuts through part in similar fashion to young Jedi Obi-Wan Kenobi utilizing his lightsaber to dispatch Darth Maul at the conclusion of ‘The Phantom Menace’. This Photo by Unknown Author is licensed under CC BY-SA Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Sectional Views • As gravity draws the defeated Maul down the utility shaft in the Palace on Naboo, we are treated to section views of an unhappy Maul’s now-bisected body. This Photo by Unknown Author is licensed under CC BY-SA-NC Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Section Line Protocol Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Pro Tip • Show only edges the cutting-plane line touches • Omit hidden lines – Make reading interior details confusing Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Section Lines Reveal the Construction Material • Identify and emphasize exposed surfaces • Thin, parallel, slanted lines at 45 angle • Patterns represent different materials Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Blueprint Reading 1 Final Exam Name __________ Section Lines Material (1 pt each) 1. _____ 2. ______ 3. ______ 4. _____ 5. _____ 6. ______ 7. ______ 8. _____ Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Section Lines • Why does Madonna love Section Views? • She’s a Material Girl. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Full Sections • Pass cutting-pane line through entire object in a straight line Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Offset Sections • Similar to a full section, but the cutting plane is diverted to include nearby details • The details should be close to each other. If not, use two cutting planes instead of one. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Offset Sections • The offset section has the appearance of a full section – comparing the section view with the other projections helps understand the cutting -plane line path. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Half Sections • View with both exterior and interior details Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Revolved Section • Represents cross section of part Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Removed Section • Relocated to new position on drawing Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Broken-out Section • Focus on small portions in detail • Indicated by break lines Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Blueprint Reading 1 Final Exam Name __________ Section Lines Material (1 pt each) 1. _____ 2. ______ 3. ______ 4. _____ 5. _____ 6. ______ 7. ______ 8. _____ Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.