Machines and Devices of Logistics - Thematics-----------1-------------------

Classification of the transported goods and main classes of materials handling machines

Machines for handling bulk materials

Belt conveyors

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Bucket elevators

Screw conveyors

Roller conveyors

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Presentation of the conveyors at the department

Practice for the test 1

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Test 1

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Machines for handling unit loads

Containers for material handling

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Types of unit loads inside manufacturing systems

Forklifts I.

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Forklifts II.

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Automated guided vehicles

with presentation in the labor

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Overhead cranes

Overhead conveyors and monorail systems

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Test 2

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Capacity analysis of complex materials handling systems

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Modeling possibilities of manufacturing logistic processes

Graphs

Petri-nets

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SysML Modeling language

Simulation software (ált)

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Test 3

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Building and analyzing material flow in logistic systems (capacity, stocks, bottlenecks etc. using Simul8)

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

Classification of transported goods

Transported materials

Gases Liquids

Bulk materials

Solid bulk materials

Piece-goods

In natural form In loading units

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

Classification of materials-handling machinesMaterials-handling machines

Industrial trucksCranes

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)

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

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

Materials handling related features of solid bulk materials

Grain-size distribution diagram

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

Materials handling machines for handling solid bulk materials

Belt conveyorsGeneral features

Belt conveyorsComponents and construction

Belt conveyorsTypical arrangements

Belt conveyorsTypical arrangements

Belt conveyorsCalculating capacity for a belt conveyor

Capacity reduction coeff. Inclination coeff. Loading coeff.

Belt conveyorsDriving of a belt conveyor

Possibilities of increasing arc of contact

Max. circumferential forceat the drum

Required tensioning force

Max. belt force

Belt conveyorsComparison of tensioning force

Head side driven

Tail side driven

Belt conveyorsDual-drum driving system

Dual-drum driving system

Ratio of the required torques at the two drums:

Belt conveyorsCalculation 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

Belt conveyorsBelt feeding

Speed vector of the material loaded onto the conveyor conveyor speed

feeding belt

Tips for feeding:

Belt conveyorsBelt feeding

Belt conveyorsDischarge from the belt

Discharge over the head pulley

Discharge from fixed tippers

Discharge from moveable tippers

Discharge by ploughing

Tube belt conveyors

Construction

source: http://www.beumergroup.com

Typical curve radius for normal belt conveyor

Typical curve radius for tube conveyor