Section Views(catia v5(

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Section Views

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Section ViewMultiview drawing technique that contain special views of part/parts to represent the interior features

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Sectional ViewSection view is based on the use of an imaginary cutting plane that cuts through the object to reveal the interior features

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Sectional Drawing- Eliminating the hidden lines

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Treatment of Hidden Lines

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Optional Use of Hidden Lines

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Representation of planes and Edges in a Section View

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CAD Technique

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Visualization of a Section View

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Visualization of a Section View

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Cutting Plane linesThe edge view of the cutting plane

Cutting plane lines are thick (0.6 mm or 0.032”), dashed lines that extend pass the edge of object 6 mm or ¼ inch

Cutting plane line has precedence over the center line

Cutting plane line is not added to drawing when its position is obvious

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Line Types for Cutting PlaneThe edge view of the cutting plane one long and two

shot dashes

equal length dashed line

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Classifications of Cutting Plane lines1- Frontal cutting plane2-Horizontal cutting plane3- Profile cutting plane

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Classifications of Cutting Plane lines1- Frontal cutting plane2-Horizontal cutting plane3- Profile cutting plane

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Classifications of Cutting Plane lines1- Frontal cutting plane2-Horizontal cutting plane3- Profile cutting plane

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Multiple Cutting Plane lines

Horizontal & Profile section views

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Section Line Practices

General symbol

IdenticalDrawn in the same directionUniform spacing

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General Purpose (Cast Iron) Section Line

45 degree angleSpace of 1.5 mm to 3 mm or moreThin black line (0.35 mm or 0.016”), H or 2H pencil

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Section Line Placement

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Notes in Section-Lined Area

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Outline Sections

Large parts – to save time

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Thin Wall Sections

Parts less than 4 mm thicke.g. Washers , Gaskets

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Section View Types

1- Full section2- Half section3- Broken-out section4- Revolved section5- Removed section6- offset section7- Assembly section8- Auxiliary section

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Full Section

General purpose:45 degree angleSpace of 1.5 mm to 3 mm or moreThin black line (0.35 mm or 0.016”), H or 2H pencil

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Full Section

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Half Section

- Hidden lines are removed in both halves- Most often on symmetrical parts- in Assemblies

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Broken-Out Section

- Hidden lines may be removed in the unsectioned portion

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Revolved Section

- e.g. bar, handle, spoke, web, aircraft wing, or other elongated features

- Showing the cross section without drawing the other view

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Removed Section

- Similar to the revolved section but the section is drawn adjacent to the orthographic view for better clarification

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Removed Section

- Multiple removed section views for continuously varying shape

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Removed Section

- Scaled removed section views

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Removed Section- Aligned removed section views

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Offset Section- Bent at one or more 90° angles to pass through the important features

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Offset Section- Multiple offset section

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Assembly Section

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Assembly Section- Standard pats not section linede.g. :shafts bearings, roller or ballGear teethThreaded fastenersNuts and boltsRivetsRibsSpokesLugsWashersKeysPins

- Different hatching angle or material symbols are used for adjacent parts

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Auxiliary Section

- Full

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Auxiliary Section

- Partial

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Sectioning Conventions

- Ribs, webs, lugs and other thin wall are not section lined because it gives the false impression that the part is thicker than it really is

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Sectioning Conventions

- Ribs, webs, lugs and other thin wall are not section lined

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Sectioning Conventions-Ribs, webs, lugs and other thin wall are section lined to avoid mistake-Use alternate section lines

-Webs flush with the rim and hub-Webs are lost without section lines

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Aligned Section

- Holes

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Aligned Section

- Spokes

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Aligned Section

- Lugs

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Aligned Section

- Ribs

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Conventional Breaks

- Revolved section views or for shortening the elongated parts