Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering...
Transcript of Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering...
Gear DrawingGear Drawing
ME 260: Mechanical Engineering Drawing IIME 260: Mechanical Engineering Drawing II
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Gears: ClassificationGears: Classification
Spur GearsSpur Gears
Gears: ClassificationGears: Classification
Helical Gear
Gears: ClassificationGears: Classification
Bevel GearBevel Gear
Gears: ClassificationGears: Classification
Worm GearWorm Gear
Gears: Tooth ProfilesGears: Tooth Profiles
Involute ProfileInvolute Profile
Cycloidal Profile
Gears: Cycloidal ProfileGears: Cycloidal Profile
Gears: Involute ProfileGears: Involute Profile
Gears: Pressure LineGears: Pressure Line
Gears: NomenclatureGears: Nomenclature
Gear DrawingGear Drawing
Draw the pitch circle and a horizontal tangent to the pitch circleDraw the pitch circle and a horizontal tangent to the pitch circle
Gear DrawingGear Drawing
Draw a line inclined at an angle 14.5o with the previous line. This is the pressure line.Draw a line inclined at an angle 14.5 with the previous line. This is the pressure line.
Gear DrawingGear Drawing
Draw a line from the center which is perpendicular to the pressure lineDraw a line from the center which is perpendicular to the pressure line
Gear DrawingGear Drawing
Draw a circle with radius OA and center O. This is the base circleDraw a circle with radius OA and center O. This is the base circle
Gear DrawingGear Drawing
Divide the base circle in 2N equal segments so as to provide space for N teeth and N spaces.
Gear DrawingGear Drawing
Diametral Pitch, PDiametral Pitch, Pdd = N/D= N/DAddendum, a = 1/PAddendum, a = 1/PddDedandum, b = 1.157/PDedandum, b = 1.157/Pdd
Draw the addendum circle [Dadd = D+2a] and the dedandum circle [Dded = D-2b]
Gear DrawingGear Drawing
Draw two circles with centers at 1 and 4 on the base circle and radius 1/4th of the pitch diameterto form a single tooth
Gear DrawingGear Drawing
Draw two circles with centers at 1 and 4 on the base circle and radius 1/4th of the pitch diameterto form a single tooth
Gear DrawingGear Drawing
Erase unnecessary portion of the circles and keep the outline of the tooth
Gear DrawingGear Drawing
Thank YouThank You