This document describes the design and development of an electric coconut dehusking machine. The machine uses a rotary blade mechanism powered by a 1HP electric motor to remove coconut husks, providing a lower-cost alternative to manual dehusking. The key components include a frame, bearings, gears, hollow shafts, blades, chain and sprockets. The machine has undergone modifications to address issues like coconut jamming. With further modifications like increasing the motor power and shaft spacing, the machine aims to maximize dehusking efficiency while keeping costs lower than pneumatic or hydraulic dehusking systems.

1. COCONUT DEHUSKING MACHINE
Group No :9
AFTHAB K MUHAMMED
ARJUN C VIJAYAN
BASIL VARGHESE
BIJU V V

2. INTRODUCTION
GENERALLY, COCONUTS ARE DEHUSKED MANUALLY USING EITHER A
MACHETE OR A SPIKE [1]
ATTEMPTS AT MECHANISATION HAS SO FAR EITHER BEEN NOT FULLY
SUCCESSFUL OR ENDED UP TOO COSTLY
DISADVANTAGES OF PRESENT TECHNIQUES:
TIME CONSUMING
HUMAN EFFORT REQUIRED
LACK OF MAN POWER AVAILABILITY
COCONUT DEHUSKING MACHINE USES ELECTRIC POWERED ROTARY BLADE
MECHANISM TO TEAR OFF THE HUSK FROM COCONUT

3. AIM OF PROJECT
WITH COCONUT DEHUSKING MACHINE WE AIM TO PROVIDE :
LOW COST COCONUT DEHUSKING
REDUCTION OF HUMAN EFFORT
REDUCTION OF MANPOWER REQUIREMENT
IMPROVEMENT ON NUMBER OF NUTS PROCESSED PER HOUR

4. DESIGN

5. COMPONENTS
FRAME
BEARINGS & BEARING HOUSING
GEARS
HOLLOW SHAFTS
BLADES
CHAIN & SPROCKETS
ELECTRIC MOTOR
OVER ARM & SPRING ARRANGEMENT

6. SPECIFICATIONS
ANGLE : ISA 4545
HOLLOW SHAFT : 40M
BEARINGS : 45BC02
GEARS : SPUR TYPE 89MM RD, 108MM OD, 19MM PITCH
SPROCKET : 210MM OD & 83MM OD
BLADES : 1”, 3MM FLAT
MOTOR
PHASE : SINGLE
POWER : 1HP
SPEED : 1420RPM

7. WORKING PRINCIPLE

8. FABRICATION
a) FABRICATION OF FRAME [2]
 CUTTING [5]
 GRINDING & [6]
 WELDING OF ANGLE SECTION
b) FABRICATION OF BEARING HOUSING
 BENDING &
 WELDING OF FLAT
c) GEAR SPLIT INTO TWO BY OXY ACETYLENE TORCH
d) TURNING OF SHAFTS INTO REQUIRED OD [3]
e) CONNECTING SHAFT TO BEARING HOUSING
SPOTTING BEARING HOUSING
f) FABRICATION OF BLADES [4]
 CUTTING &
 WELDING OF FLATS ONTO SHAFTS

9. FABRICATION CONTD.
g) FIXING OF GEARS
FABRICATION OF SLEEVE
SPOTTING OF GEARS ONTO SHAFT
h) SPOTTING OF SPROCKET ONTO SHAFT
i) FIXING OF MOTOR
DRILLING OF BOLT HOLES ON FLATS
SPOTTING OF FLATS
BOLTING MOTOR ONTO FLAT
j) SPOTTING OF SPROCKET ON MOTOR SHAFT
k) CONNECTING CHAIN TO THE SPROCKETS
l) FABRICATION OF OVER ARM & CONTAINMENT BOX
m) WELDING OF GI SHEETS TO FRAME

10. MODIFICATIONS
COCONUT GETTING JAMMED
BLADE CONFIGURATIONS CHANGED
BLADE HEIGHT REDUCED AND RECUT
SPEED OF ROTATION HIGH
PULLEY CHANGED TO CHAIN AND SPROCKET
INTERMEDIATE SHAFT UNDER FABRICATION

11. FINAL STATUS
 TIME:
 PULLEY : 2 min
 CHAIN : 1.5 min
 TWO STAGE : 1 min
 OVER ARM : 17 Sec
 DEHUSKED 8 COCONUTS TILL DATE
VIDEO

12. COST FACTOR
FINAL COST : Rs 5000/-
MARKET PRICE
COST OF PNEUMATIC SYSTEM : Rs 20000/-
COST OF HYDRAULIC SYSTEM : Rs 30000/-
COST OF ELECTRIC SYSTEM : Rs 40000/-
MACHINE DEVELOPED BY KERALA GOVT INITIATIVE : Rs 75000/-

13. FUTURE SCOPE & MODIFICATIONS
REDUCING SPEED OF MOTOR : 8 POLE MOTOR
POWER OF MOTOR MUST BE INCREASED : 2 Hp
DISTANCE BETWEEN SHAFTS MUST BE INCREASED
LENGTH OF SHAFTS MUST BE INCREASED
HOPPER ARRANGEMENT CAN BE PROVIDED

14. ADVANTAGES ON MODIFICATION
FAST OPERATION
LESS MANPOWER REQUIREMENT
LABOUR REQUIREMENT MINIMUM
CAN BE CLUBBED ALONG WITH HUSK SHREDDING UNITS FOR MASS PRODUCTION
NUTS PER HOUR HIGH COMPARED TO PNEUMATIC AND HYDRAULIC SYSTEMS
COST LESS COMPARED TO PNEUMATIC AND HYDRAULIC SYSTEMS

15. CONCLUSION
THROUGH THIS PROJECT WE WILL BE ABLE TO OFFER
LOW COST DEHUSKING SOLUTION
MAXIMUM SCRAP UTILISATION
120 TO 200 NUTS PER HOUR
 ON APPLYING MODIFICATION WE CAN
 MAXIMIZE DEHUSKING EFFICIENCY
 REDUCE SPEED OF ROTATION
 IMPROVE TORQUE

16. THANK YOU