Thiết kế flash - Section views

Section ViewsSection ViewShows interior detail of a partUsed when hidden lines tend to confuse the interior detail of part Section View ProcessPass a cutting plane through partTake viewing direction normal to cutting planeRemove that portion of object between viewer and plane Section View Notes - 1Cutting plane seen on edge shows location of sectionViewing direction for section view indicated by sight arrows drawn perpendicular to cutting planeSeen on edge, cutting plane represented as thick line with two dashesSection View Notes - 2Hatching used to indicate interior parts of object through which cutting plane passesSection View Notes - 3Lines that would be visible after making cut are shown on a section viewHidden lines are normally not shown on a section view Kinds of Section ViewsFullHalfOffsetBroken OutRevolvedRemovedAlignedAssemblyHalf Sections - 1With symmetrical objects, not always necessary to pass the cutting plane all the way through part In a half section cutting plane passes half way through the partHalf SectionsHalf Sections - 2One quarter of part is removed in a half sectionCenterline separates two halvesExternal features included on un-sectioned halfHidden lines normally omitted in both halves Offset SectionsAn offset section is a full section used when important features do not lie along same planeCutting plane offset to pass through important features Change of plane lines not drawn in sectioned view where the cutting plane bends 90 degrees Offset SectionsBroken Out SectionsBroken out section used when only a portion of part needs to be sectionedBreak line (jagged, freehand) separates sectioned from un-sectioned portion of drawing Revolved SectionsIn a revolved section, a cross section is revolved 90 degrees about an axis of revolutionCenterline used to indicate axis of revolutionSection view superimposed on multiview viewLines adjacent to revolved view drawn broken out or using conventional breaks Removed SectionsSimilar to revolved section,  pass cutting plane perpendicular to part, revolve cross section 90°Removed section drawn adjacent to multiview, not on top of it Conventional Practices - SectionsRibs, webs and other thin features (e.g., lugs, spokes, gear teeth) are not sectioned when cutting plane is passed parallel to feature Aligned SectionsUsed to revolve radial features to make them easier to representHoles, ribs, lugs, etc., may be “aligned” about a vertical or horizontal center line to give a clearer representation of the geometry Assembly Section ViewsIn an assembly view, different hatch patterns are applied to different partsAssembly Section ConventionsThin walled parts (e.g., washers, bushings, gaskets) are not sectionedCertain common features in an assembly are not sectioned. These include: shafts, ribs, bearings, spokes, threaded fasteners, gear teeth, keys, washers, lugs, nuts and bolts, rivets, pins shaftbushingSection Views