Design and Fabrication of Mini Weighing Crane

7/28/2019 Design and Fabrication of Mini Weighing Crane

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GUIDE : Mr.Sundara VinayakanBatch NO:A6

SHIVA PRASAD REDDY .P

BOGA CHANDRAKANTH

TANNIRU VENKANNA BABU

NAIDU PRASAD C


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Crane : A Crane is a lifting machine which is used to

both lift and lower the objects and move them

horizontally.

Cranes have come into present application onlysince introduction of engines beginning in 19th

century.

Crane are of mobile, hydraulic, pneumatic, over

headed, gantry , tower etc types.


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A crane is a mechanism that uses a collection of simple machines to bothrise and lower objects , also move them horizontally .the mini weighingcrane is similar to the above type ,which is a combination of simplemachines as pneumatic cylinder , weighing setup ,geared motoretc., areequipped to gain mechanical advantage and lift objects.

Mini weighing crane uses two pneumatic cylinders of 10kgf/cm2 each

that imparts a force by converting the potential energy of compressed gasinto kinetic energy, where forcing the pistons to move in specifieddirection to lift the objects. The pneumatic setup is powered by two-stagereciprocating compressor, which is operated by hand lever valve, wherecylinders retraction enables to lift the objects.

The horizontal movement is achieved by sprocket and chainarrangement, which is powered by geared motor. The stability of crane is

achieved by the rigid base and the structure i.e., the rated object loadon crane must be less than what it would require to tip crane over. Thismini weighing crane can be used for lifting smaller objects and also weighthem.


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For lifting activities in confined spaces that willallow limited floor space.

To meet multi function purposes.

To attain effective control in lifting andweighing the objects.

For easy designing by using standard cylinders

and other components i.e , pneumatic setup.


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The setup consists of two pneumatic cylindersof 10kgf/cm2 which is used to lift the object inits retraction state.

The cylinders are controlled by two valveoperated by direction control valve which isactuated by a lever.

A two stage compressor is used to power thepneumatic cylinders.

The weight of the load is given by digitaldisplay.


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Pneumatic Cranes:-These cranes use a pneumatic cylinder that impart a force byconverting the potential energy of compressed gas into kinetic energy

Pneumatic cylinderPneumatic cylinders are mechanical devices which produce force

in combination with movement and are powered by compressedgas (air).

A piston reciprocates inside the cylinder. A pump is used to

supply air to the cylinder.The compressed gas expand and forces piston to move in thedesired direction.

Pneumatic cylinder can be single acting or double acting .Operation diagram of a single acting cylinder. The spring can also

be outside the cylinder, attached to the item being moved.

Operation diagram of a double acting cylinder3D animated pneumatic cylinder( CAD)


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Simplicity of Design And Control: Machines are easily designed using standard cylinders & other

components. Control is as easy as it is simple ON - OFF typecontrol.

Reliability :

Pneumatic systems tend to have long operating lives and requirevery little maintenance.

Storage:As Compressed Gas can be stored, allowing the use of

machines when electrical power is lost.Safety

Very low chance of fire (compared to hydraulic oil). Safety

Very low chance of fire (compared to hydraulic oil).Machines can be designed to be overload


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Accidents Occur:Instability unsecured load, load capacityexceeded, or ground not level or too soft.

Lack of communication The point of operation is a distance from thecrane operator or not in full view of theoperator.

Lack of training

Inadequate maintenance or inspection


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some of the applications in the mini weighingcrane is as follows:

1. Used in lifting objects in range of 25 to 30 kg.

2. Used in paper mills for weighing papers.

3. Used in markets for weighing such asvegetables, flowers etc

4. Used in small scale industries for materialhandling.


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The mini weighing crane is used in small scaleindustries for multi uses like material handling,lifting and weighing.

The objects can be moved to certain distance bythis type of cranes and its weight can bedisplayed digitally.

Design and Fabrication of Mini Weighing Crane

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