Input value Gravity 9.81

Hoist DesignStep 1: Design AimHoisting Speed Traverse Speed Lifting Height Design Work Load Hoist Selft weigth 4.25 20 7.5 5000 300 0.6 m/min 5 m/min m kg kg

Step 2: Mechanism Work Group Classification2.1 Select Total working Hours

2.2 Determine Load Spectum

2.3 Determine Group Class

Step 3 Determination of Loading Catagories

Dead Load R1+R2 Dynamic factor for mass

Pw=W1 1

Live load R3+R4 Hoist Load Dynamic Factor

Phd=Ph2 2

R5,R6 V1,V2, reffer to AS 1418.2-2002 Crane of other mechanism R5 Loads rising form friction force R6 Wind Action V1, V2 Load due to collision or buffer B1

Coefficient of friction Radius of drive wheel Gear ration Total Wheel force

rLIa Rmax

Load due to emergency state B2

Step 4: Determine effective stress on materialMaterial UltimateTensile Strength Yield Strength of Material Effection strength Permissible Shear Permissible Compssion Permissible Tension

B E EF S C T s=0.67yield/(3^1/3) C=0.67yield T=0.67yield

Sample Calculation Step by StepStep 1: As design Aim setup

Step 2: Classification of DesignWork hours Norminal Load Spetum Group Class T4 0.25 M5

Step 3 Load CalcuationR1+R2 Hoist Self Load Dynamic factor of mass Dead Load R3+R4 Design Load Structure nature frequency Hoist ting acceleration Dynamic factor of live load Hoisting Load R5 2943 N 1.1 3237.3 N

49050 2.4 0.070833 1.109208 54406.67

N Hz m/s^2 N

R6 Loads arising from friction force V1 V2 B1 Coefficient of friction between wheel & rail Radius of Track Wheel Gear ration Motor to wheel Total wheel force Load due to collision of buffer B2 Emergency force

200 N neglect neglect

0.25 0.05 m 0.016667 57643.97 N 43.23298 N

neglect

Total Load in all direction

57887.2

Material (MPa) Steel Grade 250 Steel Grade 350 Steel Grade 500

Yield 250 350 500

Tensile 320 450 600

Effective shear max 237 332.5 460 110.0988 154.4636 213.6939

compression Tension 237 332.5 460 237 332.5 460

Hook Block Design

AS 3777-2008,AS 2318-2006,AS 1721-1985

Step 1: Quality Grade Selection AS3777 Clause 4.2 Type M P S

Low carbon steel normalized. Low carbon steel quenched and tempered Steel with two or more alloying elements quenched and tempered.

Step 2: MaterialFor manufacture AS3777-2008 Clause 5

Steel Used in hook shall comply with AS 1442, AS 1444, AS1443, AS1448; Fully killed and fine grained and not eceed the following maxmum allowable cast analysis of elements (i) Carbon 0.45% (ii) Phosphorus 0.05% (iii) Sulfur 0.05%Step 3: Manufacture AS 3777-2008 Clause 6 Hooks shall not be welded, Heat treatment,Surface finish Step 4: Dimension The actual geometric of the hook can be determin from figure below according to AS3777-2008

Step 5: Shank Design AS2318-2000 For material having a tensile stress less thank 430MPA Work load limit WLL