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Designing and manufacturing overhead crane

Designing and manufacturing overhead crane

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Designing and manufacturing overhead crane

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  1. Designing and manufacturing overhead crane Omar Jaafar Hassan 199900307 Humaid AL-Marzoqi 200000181 Khalid AL-Hasani 199900342 Zayed AL-Katheeri 199900295 Advisor Prof. Kamal A.F.Moustafa

  2. Crane Mechanism

  3. MaterialsHandling 1) Picking up the load 2) Transporting the load 3) Setting the load down

  4. Importance of cranes 1.Avoid Congestion, Delays and unnecessary handling.2. Improve production operations . 3. Lower unit Materials handling Cost

  5. Importance of cranes cont. 4. Reduce damage due to Materials handling. 5. Maximize space utilization. 6. Reduce the accident rate and severity of injury.

  6. Type of cranes Mobile cranes Stationary cranes

  7. Mobile cranes Mounted Cranes Crawler-Mounted Cranes

  8. Mounted Cranes A wheel-mounted crane is mobile and flexible crane that can be driven on or off roads over rough terrain. Advantage: small working area.

  9. Crawler-Mounted Cranes Stable base. The advantage: continuous work in remote areas

  10. Stationary cranes Bridge Cranes Jib Cranes Gantry cranes Tower Cranes

  11. Bridge Cranes The most important part are: girders, trucks, end ties, walkway and a drive mechanism

  12. Jib Cranes Jib cranes consist of a horizontally mounted beam, not unlike a monorail, but that can swing in a semi-circle.

  13. Gantry cranes Bridge crane but with girders that used in free space.

  14. Tower Cranes Construction crew uses the tower crane to lift steel, concrete, large tools.

  15. Main Components of Overhead Crane Girder Trolley Hoist Runway Rail

  16. Safety Safety instruction Steps to inspect the crane safety Maintenance of the overhead crane

  17. Safety Instructions Loads should not be suspended over personnel below. Avoid rapid movements in any direction

  18. Safety Instructions Do not exceed the rated load capacity of the crane, hoist, chain, cable, slings, or other component.

  19. Steps to inspect the crane safety Daily inspection Periodic inspection

  20. Daily inspection Hoisting and lowering Trolley travel Bridge travel

  21. PeriodicInspections Deformed, cracked or corroded members Loose bolts or rivets Cracked or distorted parts such as bearings, gears, rollers, etc Excessive wear on brake system parts

  22. MaintenanceRequirements A preventive maintenance program based on the crane manufacturer’s recommendations must be implemented. Only specialist engineer may perform the required maintenance and repairs.

  23. Procedure of designing

  24. Designing Techniques • Newton’s Second Law approach • Lagrange’s approach

  25. Newton’s Second Law approach Assumptions: Cable is mass less The payload is lumped with the hook and modeled as a sphere The system is frictionless

  26. Newton’s Second Law approach cont.Free body diagram of the system

  27. Newton’s Second Law approach cont.Trolley kinetic

  28. Newton’s Second Law approach cont.Payload kinetics Force balance in the horizontal direction

  29. Newton’s Second Law approach cont. Payload kinetics Force balance in the vertical direction

  30. Lagrange’s Approach

  31. Lagrange’s Approach Cont. Kinetic energy expression Potential energy expression

  32. Lagrange’s Approach Cont.

  33. State Variable Form

  34. State Space Form

  35. MAT-LAB Representation

  36. Force Behavior

  37. Displacement Behavior

  38. Velocity Behavior

  39. Swing Behavior