Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering...

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Gear Drawing Gear Drawing ME 260: Mechanical Engineering Drawing II ME 260: Mechanical Engineering Drawing II

Transcript of Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering...

Page 1: Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering Drawing II. Gears: ClassificationGears: Classification Spur GearsSpur Gears. ... Gear

Gear DrawingGear Drawing

ME 260: Mechanical Engineering Drawing IIME 260: Mechanical Engineering Drawing II

gg

Page 2: Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering Drawing II. Gears: ClassificationGears: Classification Spur GearsSpur Gears. ... Gear

Gears: ClassificationGears: Classification

Spur GearsSpur Gears

Page 3: Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering Drawing II. Gears: ClassificationGears: Classification Spur GearsSpur Gears. ... Gear

Gears: ClassificationGears: Classification

Helical Gear

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Gears: ClassificationGears: Classification

Bevel GearBevel Gear

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Gears: ClassificationGears: Classification

Worm GearWorm Gear

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Gears: Tooth ProfilesGears: Tooth Profiles

Involute ProfileInvolute Profile

Cycloidal Profile

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Gears: Cycloidal ProfileGears: Cycloidal Profile

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Gears: Involute ProfileGears: Involute Profile

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Gears: Pressure LineGears: Pressure Line

Page 10: Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering Drawing II. Gears: ClassificationGears: Classification Spur GearsSpur Gears. ... Gear

Gears: NomenclatureGears: Nomenclature

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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

Page 12: Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering Drawing II. Gears: ClassificationGears: Classification Spur GearsSpur Gears. ... Gear

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.

Page 13: Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering Drawing II. Gears: ClassificationGears: Classification Spur GearsSpur Gears. ... Gear

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

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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

Page 15: Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering Drawing II. Gears: ClassificationGears: Classification Spur GearsSpur Gears. ... Gear

Gear DrawingGear Drawing

Divide the base circle in 2N equal segments so as to provide space for N teeth and N spaces.

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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]

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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

Page 18: Gear Drawingteacher.buet.ac.bd/fhaider/gear.pdf · Gear Drawing ME 260: Mechanical Engineering Drawing II. Gears: ClassificationGears: Classification Spur GearsSpur Gears. ... Gear

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

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Gear DrawingGear Drawing

Erase unnecessary portion of the circles and keep the outline of the tooth

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Gear DrawingGear Drawing

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