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Machines and Devices of Logistics - Thematics

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1 Machines and Devices of Logistics - Thematics
Forklifts II. Automated guided vehicles with presentation in the labor Overhead cranes Overhead conveyors and monorail systems Test 2 Capacity analysis of complex materials handling systems Modeling possibilities of manufacturing logistic processes Graphs Petri-nets SysML Modeling language Simulation software (ált) Test 3 Building and analyzing material flow in logistic systems (capacity, stocks, bottlenecks etc. using Simul8) 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 1 Test 1 Machines for handling unit loads Containers for material handling Types of unit loads inside manufacturing systems Forklifts I.

2 Requirements on timing and relations
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 Requirements on timing and relations Materials handling Logistics Provision of materials’ transport services

3 Classification of transported goods
Transported materials Piece-goods Bulk materials In natural form In loading units Gases Liquids Solid bulk materials

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

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

6 Materials handling related features of 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 Max. circumferential force
at the drum Required tensioning force Max. belt force Possibilities of increasing arc of contact

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

18 Belt conveyors Dual-drum driving system 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 Belt cleaner resistance 2-5 N/cm Material acceleration (feeding) resistance Resistance of a discharge trolley Lifting resistance 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
Typical curve radius for normal belt conveyor Typical curve radius for tube conveyor source:

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