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Design, Fabrication And Performance Evaluation Of Pedal Operated Groundnut Decorticator
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3.5 Material Selection
Selection of materials for the fabrication of the groundnut decorticator was based on the following factors
Availability of local materials for fabrication of the component parts of the decorticator
Cost of the materials
Weight of the material
Physical properties of the materials
The load carrying capacity
How the material selected can land itself to manufacturer process
Stability of the machine
Vibration of the machine
ix. Strength of the materials
x. Ease of maintenance
xi. Corrosion resistance
xii. Rigidity of the material
3.6 Fabrication Procedure and Assembly
3.6.1 Fabrication of Main Frame
The main frame is the main unit of t he machine on which all other part are rested on.
The frame of the machine was made from mild steel angle pipe of 50mm x 25mm. The length, breadth and height of the pipe were cut to the required size with hacksaw after appropriate measuring and marking out. It was then joined with electric arc welding machine.
3.6.2 Fabrication of Hopper
The hopper was made from mild steel sheet of 1.5mm thickness. The sheet was cut with bench shears. The shape was in the form of a cuboid and welded fully with arc welding machine with a dimension 280mm x 270mm x 40mm and welded at angle 400 to ensure easy flow of the feed.
3.6.3 Fabrication of Bicycle Pedal and Chain Drive
The bicycle pedal and chain drive mechanism gives rotary power to the decorticator when operated. They were made with standard bicycle crank of 44 teeth, freewheel of 16teeth and chain.
3.6.4 Fabrication of Decorticating Drum
The decorticating drum was made with mild steel sheet of 1.5mm. It was cut with guillotine shears and rolled with manual rolling machine to form a cylindrical shape and then welded together with electric arc welding machine, this forms the housing to the decorticating shaft. The decorticating shaft was made with mild steel shaft of 28mm, it was machined on the lathe to 25mm and the joined to mild steel flanges which holds the decorticating bars.
3.6.5 Decorticating Screen
The screen was made to form the base of the concave drums; the aperture size was based on the geometric mean diameter of the groundnut kernel. A standard screen for decorticating groundnut was used.
3.6.6 Operator Seat
The operator seat was made with a standard bicycle seat. It was mounted on a square pipe which is embedded in another bigger square pipe to make the seat adjustable. The square pipe was welded to the bicycle frame with arc welding machine.
3.6.7 Aluminum Spike Tooth
The spike tooth was attached to the flange attached to the shaft with the aid of bolts and nut fastening in an adjustable manner to allow variable clearance setting between the drum and the screen.
3.7 Principle of Operation of the Machine
The groundnut decorticator is designed to power by man with a two way sprocket systems driven through chain drive at speed range 500rpm to 900rpm. The machine is manually feed through the hopper with two or three capable people to ensure continuous operation. The separated/cleaned seeds are collected via the seed outlet and the chaff through the chaff outlet.
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ABSRACT - [ Total Page(s): 1 ]ABSTRACTShelling of groundnut pods (Arachis hypegea) by hand is tedious, laborious and unhygienic with low efficiencies. As a result farmer get low income due to amount of broken kernels and a lot of time is lost in the tedious shelling operation. To overcome this problem, pertinent parameters that influence shelling efficiency of pedal operated groundnut decorticator were identified. Pedal operated decorticator were designed and fabricated with chain and sprocket of bicycle and aluminum spike t ... Continue reading---
APPENDIX A - [ Total Page(s): 3 ] ... Continue reading---
APPENDIX B - [ Total Page(s): 6 ]S.E= ("H" )/"A" "×100%" = "549" /"1000" "×100%" = 55% At 1500g S.E= ("H" )/"A" "×100%" = "808" /"1500" "×100%" = 54%Percentage of breakage Broken Efficiency (%) B.E= ("E" )/"A" "×100%" Where B.E is broken efficiency (%) E= Weight of broken groundnut seed (g) A= Weight of groundnut seed fed in to hopper (g) Broken Efficiency for Operator (I) At 500g B.E= "E " /"A" ... Continue reading---
LIST OF TABLES - [ Total Page(s): 1 ]LIST OF TABLESTable No Table 3.1: BILL OF ENGINEERING MEASUREMENT AND EVALUATION (BEME) Table 3.1: Sample Preparation Table 4.1 Data Sheet for Physical Properties of Groundnut Pods Table 4.2 Data Sheet for Output Parameters Table 4.3 Data Sheet for Output Table 4.4 Average Performance of Thresher ... Continue reading---
LIST OF PLATES - [ Total Page(s): 1 ]LIST OF PLATESPlate No Plate 2.1: Groundnut Pod Plate 3.1: Sample of Groundnut Seed Plate 3.2: Determination of Coefficient of Static Friction and Angle of Repose Plate 3.3: Pedal Operated Groundnut Decorticator Plate 3.3: Digital Venier Caliper Plate 3.4: Digital Weighing Scale Plate 3.5: Digital Stop Watch Scale Plate 3.6: Electric Oven Plate 3.7: Tachometer ... Continue reading---
LIST OF FIGURES - [ Total Page(s): 1 ]LIST OF FIGURESFigure No Figure 2.1: Maize Sheller Figure 2.2: Hand Maize Sheller Figure 2.3: Groundnut Thresher Figure 2.4: Manual Operated Groundnut Decorticator (Oscillating Type) Figure 2.5 Power Operated Groundnut Decorticator ... Continue reading---
TABLE OF CONTENTS - [ Total Page(s): 1 ]TABLE OF CONTENTSCover Page Title Page Certification Dedication Acknowledgements Abstract Table of Contents List of Tables List of Figures List of Plates CHAPTER ONE: INTRODUCTION 1.1 Background to the Study 1.2 Statement of the Problems 1.3 Objective of the Project 1.4 Justification of the Project 1.5 Scope of the Study CHAPTER TWO: LITERATURE REVIEW 2.1 Physical Properties of Groundnut 2.1.1 Determination of Size 2.1.2 Determi ... Continue reading---
CHAPTER ONE - [ Total Page(s): 2 ]CHAPTER ONEINTRODUCTION1.1 Background to the StudyGroundnut (Arachis hypogaea) is a species in the legume or beans family (Ashish and Handa, 2014; Atiku et al., 2014). It was first cultivated in Peru. Its seed contain about 63% carbohydrate, 19% protein and 6.5% oil. Groundnuts are grown in tropical and subtropical climate regions and warmer parts of temperature regions and it is low growing annual plant and has a variety of uses. Prior to its usage however groundnut need to undergo pr ... Continue reading---
CHAPTER TWO - [ Total Page(s): 10 ]Gardi (Gsrdi (2008) developed rotary type groundnut
decorticator-cum-cleaner. The average decorticating capacity, average
decorticating efficiency, average cleaning efficiency, percent broken
kernels, cost of operation were estimated. The results showed that the
values were 120.72 kg/h, 84.69%, 87.76%, 5.7% and Rs 23.28/100kg
kernels, respectively. Haque et al., (2009) reported that
crushing strength of rubber seeds were found to be 121.1kg/cm2 followed
by J ... Continue reading---
CHAPTER FOUR - [ Total Page(s): 2 ]CHAPTER FOUR4.0 RESULTS AND DISCUSSION4.1 ResultsThe raw data for physical properties is as presented in Appendix A while the summary of the results is as presented in table 4.1.The raw data obtained from the experiment is as reported in Appendix B and the means values of the results is as presented in table 4.2. ... Continue reading---
CHAPTER FIVE - [ Total Page(s): 1 ]CHAPTER FIVE CONCLUSIONS AND RECOMMENDATIONS5.1 Conclusions The following conclusion can be drawn from the performance carried out on groundnut decorticator. 1. The lower the knuckle length of the operator the higher the threshing efficiency of the operator. 2. The lower the weight of the operator the higher the throughput capacity of the machine.3. The average performance of the thresher at average operating speed of 245.4pm are threshing efficiency 56%, unthreshe ... Continue reading---
REFRENCES - [ Total Page(s): 1 ]REFERENCESAdewunmi, T. (2000) Performance Evaluation of a Locally Developed Maize Sheller with Husking and Winnowing Capacity Proceeding of the NIAE. Pp. 68-73.Afosie, V.N., Akinhanm, T.F. and Ojiodu, C.C. (2009) Proximate Analysis and Physio-Chemical Properties of Groundnut.Ashish S. Raghtafe and Dr. C. C. Handa (2014): “Design consideration of Groundnut Sheller machineâ€. Department of Mechanical Engineering, KDK College of Engineering, Nagpu. International Journal of Innovative R ... Continue reading---
