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Machines and Devices of Logistics - Thematics -----------1------------------- Classification of the transported goods and main classes of materials handling.

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Presentation on theme: "Machines and Devices of Logistics - Thematics -----------1------------------- Classification of the transported goods and main classes of materials handling."— Presentation transcript:

1 Machines and Devices of Logistics - Thematics Classification of the transported goods and main classes of materials handling machines Machines for handling bulk materials Belt conveyors Bucket elevators Screw conveyors Roller conveyors Presentation of the conveyors at the department Practice for the test Test Machines for handling unit loads Containers for material handling Types of unit loads inside manufacturing systems Forklifts I Forklifts II Automated guided vehicles with presentation in the labor Overhead cranes Overhead conveyors and monorail systems Test Capacity analysis of complex materials handling systems Modeling possibilities of manufacturing logistic processes Graphs Petri-nets SysML Modeling language Simulation software (ált) Test Building and analyzing material flow in logistic systems (capacity, stocks, bottlenecks etc. using Simul8)

2 Definition of materials handling Organized motion of goods and materials which covers shorter distances and the state of the transported object doesn’t change. In a typical factory, MH accounts for 24% of all employees, 55% of the space, and 87% of the production time. It accounts for between 15% to 70% of the cost of a product. Relation of materials handling and logistics Materials handling Provision of materials’ transport services Logistics Requirements on timing and relations

3 Classification of transported goods Transported materials GasesLiquids Bulk materials Solid bulk materials Piece-goods In natural formIn loading units

4 Classification of materials-handling machines Materials-handling machines Continuous operating materials handling machines Materials-handling machines Loading machinesTransporting machines Lifting machines Auxiliary devices Discontinuous operating materials handling machines

5 Classification of materials-handling machines Materials-handling machines Industrial trucks Cranes Conveyors Other equipment Chute conveyor Wheel conveyor Roller conveyor Chain conveyor Slat conveyor Flat belt conveyor Magnetic belt conveyor Troughed belt conveyor Bucket elevator Vibrating conveyor Screw conveyor Pneumatic conveyor Vertical conveyor Cart-on-track conveyor Tow conveyor Trolley conveyor Power-and-free conveyor Monorail Sortation conveyor Jib crane Bridge crane Gantry crane Stacker crane Tower crane Mobile crane Hand truck Pallet jack Walkie stacker Counterbalanced lift truck Reach stacker Turret truck Order picker Sideloader Tractor-trailer Automatic guided vehicle (AGV)

6 Materials handling related features of solid bulk materials Solid bulk materials: - typically homogeneous materials - transport and loading in greater masses, without packaging Materials handling related features of solid bulk materials: -grain size (average, max, min) - grain-size distribution - bulk-density - friction coefficient on solid surfaces - moisture content - cohesion - friability (fragile) - flowability - abrasiveness - corrosiveness - temperature - frozen - health-threatening

7 Materials handling related features of solid bulk materials Examples : Ashes: abrasive when dry, corrosive when wet Charcoal: dusty (explosive dusts) Cement: entrains air, compacts in storage, must not contact with moisture Grass seed: gentle handling Sulphur: danger from static sparks, risk of ignition, corrosive when wet Iron ore: may be in large fragments Wheat: hygienic conditions

8 Materials handling related features of solid bulk materials Grain-size distribution diagram

9 Materials handling machines for handling solid bulk materials Choice of equipment 1. Type of conveyor or elevator 2. Material transfer 3. Profile 4. Material properties Effect of the height difference for the choice of the equipment

10 Materials handling machines for handling solid bulk materials

11 Belt conveyors General features

12 Belt conveyors Components and construction

13 Belt conveyors Typical arrangements

14 Belt conveyors Typical arrangements

15 Belt conveyors Calculating capacity for a belt conveyor Capacity reduction coeff.Inclination coeff.Loading coeff.

16 Belt conveyors Driving of a belt conveyor Possibilities of increasing arc of contact Max. circumferential force at the drum Required tensioning force Max. belt force

17 Belt conveyors Comparison of tensioning force Head side driven Tail side driven

18 Belt conveyors Dual-drum driving system Ratio of the required torques at the two drums:

19 Belt conveyors Calculation of the required force Length-dependant resistance Length depending drum resistance factor Deflector plank resistance 2-5 N/cm Belt cleaner resistance Material acceleration (feeding) resistance Lifting resistance Resistance of a discharge trolley Resistance of forward tilted idlers Number of forward tilted idlers

20 Belt conveyors Belt feeding Speed vector of the material loaded onto the conveyor  conveyor speed feeding belt Tips for feeding:

21 Belt conveyors Belt feeding

22 Belt conveyors Discharge from the belt Discharge over the head pulley Discharge from fixed tippers Discharge from moveable tippers Discharge by ploughing

23 Tube belt conveyors Construction source: Typical curve radius for normal belt conveyor Typical curve radius for tube conveyor


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