HINDUSTHAN COLLEGE OF
ENGINEERING AND TECHNOLOGY
Department of Mechatronics Engineering
PRAGER-VEGETABLE
CUTTER
Project Team Members:
Project Guide:
1.MUHAMED AZARUDEEN.K -720712115033
2.NARAYANAN GOPAL.M
-720712115034 Prof. K. B. BADRI NARAYANAN.
3.PRAVEEN KUMAR.S
4.RAJAKUMAR.A
-720712115041
-720712115042
Objectives
 The purpose of this project is to help the workers to reduce
their time spent in cutting the vegetables.
 Instead of using active electric source,We used pneumatic
systems so as to conserve the energy.
Literature Survey
AUTHOR
NAME
TOPIC
YEAR Patent
OBSERVATION
Hauser et al
Vegetable
cutter
2013
US 8,596,192 The mechanism of cutting the
B2
vegetables by pressing.
Pereira
Vegetable
cutter
1993
5,245,902
Neff
Opthalmic 1979
hanpiece
with
pneumatical
-ly operated
cutter
The design of blade and the
mechanism of cutting using it.
US 4,274,411 The idea of employing the
pneumatics in the cutter was
observed.
INTRODUCTION
•PRAGER is an semi automated vegetable cutter .
•Air is used as a power source in this project so that it overcomes the
alternate power source-electricity
•Pneumatics is the main concept behind this project.
•They can be used in small scale industries ,hotels and catering services.
•They are designed with the forecast ideas in the mind.
Need For Automation
 To reduce the work load
 To reduce the man power
 To reduce the fatigue of workers
 To reduce working time
 To reduce material handling
Need For Pneumatics system
•Pneumatic system use pressurized gases to transmit and
control power as the name implies, pneumatic systems
typically use air as fluid medium because air is a safe, low
cost and readily available fluid.
•There are several reasons for considering the use of
pneumatic system instead of hydraulic system as liquid
exhibit greater inertia than gases. Therefore in hydraulic
system the weight of the oil is a potential problem
automation.
•It is a low cost medium of automation
SOLENOID VALVE
 A solenoid valve is an electromechanical valve for use with
liquid or gas controlled by running or stopping an electric
current through a solenoid, which is a coil of wire, thus
changing the state of the valve.
 The operation of a solenoid valve is similar to that of a light
switch, but typically controls the flow of air or water,
whereas a light switch typically controls the flow of
electricity.
Working of solenoid valve
A- Input side
C- Pressure chamber
E- Solenoid
B- Diaphragm
D- Pressure relief
conduit
F- Output side
COMPONENTS USED:
Pneumatic Cylinder
(single/double).
Solenoid operated 3/2 way DCV.
Stainless steel blade.
Vessel
Microcontroller
Technical specifications:
•Cylinder Bore DiameterØ=32mm
•Piston Rod DiameterØ=12mm
•Stroke Length=50mm
•Pressure=5-10bar
Calculations:
Pressure=Force/Area.
Force=Pressure*Area.
Force=p*π(D2-d2)/4
D=Bore Diameter of cylinder
d=Diameter of Piston rod
We Assume that
Pressure p=5bar
Force(Extent)=362bar
Force(Retract)=311bar
AUTOMATION
 In this project the automation is carried out using a
microcontroller named AT89s52 which belongs to the family
of ATMEL
 AT89s52 is a low power high performance 8-bit
microcontroller with 8k bytes of in system programmable
flash memory
 A relay is used through which the magnetic field created by it
attracts the lever and changes the switch positions.
APPLICATIONS:
•Hotel Kitchens
•Catering services
•Drive-in restaurants
Thank you