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ME 209GROUP DESIGN

GROUP 10

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DESIGN

REQUIREMENTPick a 5kg box of

30*30*30cm3 dimensions froma conveyor belt to a trolleywith a high difference of 0.5m

and angular change of 90o.

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Design in front viewed

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NOTATIONS

D1-piston rod diameter

D2-cylider inner diameter

D3-cylinder outer diameterD5-picking solid bar diameter

D6-pin diameter

D7-lifting solid bar diameter

D8-linkage pin diameter

T3-width of linkage bar(cross section)

T4-long of linkage bar(cross section)

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MATERIALSELECTION

Compound Factor of Safety Material

Picking cylinder 12 Cast iron

Pin 14 Steel

Steel rod 12 Steel

Spring 12 High carbon steel

Factor of safety and compound

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Strenthnesses of Materials

Ultimate tensileStrength/MPa

Ultimate ShearStrength/MPa

Density /kgm-3

Cast Steel 303 251.5 7650

Steel 760 456 7840

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Appearance Clear and Bright

Density 1027 kg/m3 @ 20oC

Color Light Amber

Hydraulic Break oil (E550)(Number 2006)

Spring

Modulus 78.6 kN/mm

2

Method of manufactureCold Drawing

Lower Cost SpringAverage Stress application

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Box and Hard rubber

(data calculations)

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Piston Rod Failure

Due to Shear FailureF1/ (D1

2/4) Ultimate Shear Stress/Factor of Safety

Due to Tensile FailureR1 / (D1

2/4) Ultimate Tensile Stress/Factor of Safety

D1 =20 mm

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Specimen Calculation

Total Liquid Volume = (/4)D22*Total length

Total Liquid mass = (/4)D22*Total length*

Cylinder Weight = (/4)(D42- D2

2)Total length*Total Weight = (Cylinder Weight) * (Liquid

mass)

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Cylinder Failure

Due to Tensile FailureW/(D4

2-D22)/4 Ultimate Tensile Stress/Factor of Safety

Due to Tensile FailureD4 - D3 = t

M / I = / R1 / (D2

2/4) Ultimate Tensile Stress/Factor of Safety

D3 =88 mm

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Solid cast iron rod Failure

Due to Tensile FailureR1 / (D5

2/4) Ultimate Tensile Stress/Factor of Safety

Due to Bending FailureM / I = / Wr / (D5

2/4) Ultimate Tensile Stress/Factor of Safety

D5 =60 mm

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Mode failure of lifting mechanismPin Failure

Due to Shear FailureW / (D6

2/4) Ultimate Shear Stress/Factor of Safety

Due to Compressive FailureW / (D7

2/4) Ultimate Tensile Stress/Factor of Safety

Pin is madefrom HarderMaterial

D6 = 5 mm

D7 = 5 mm

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Linkage Failure

Due to Compressive FailureW / t4 t3 Ultimate Compressive Stress/Factor of Safety

Instantaneous cantors

Fixed point

D2 =80 mm

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Piston Rod Failure

Due to Shear FailureW / (D8

2/4) Ultimate Shear Stress/Factor of Safety

Due to Bearing FailureW / (D8t4) Ultimate Shear Stress/Factor of Safety

D8 =4 mmT3 =6 mmT4 =6 mm

Fixed point

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High efficiency

Smooth Pick and Placecan do as we wish

Reliable

Some heavy weight

Initial cost is somemuch high

Advantages Disadvantages

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