DESIGN AND FABIlICATION' OF BALL MILLING lvia CI-llN E

Transcription

1 DESIGN AND FABIlICATION' OF BALL MILLING lvia CI-llN E BY FATOLA SANYA VICT()ll 2006/24483 E [VI A PROJECT SUBMITTED IN I>ARTIAL ~FULFll,MENT OF THE REQUIREl\IENT for THE AWARD O.F BARCHELOR OF ENGINEERING (8.eng) DEGREE IN MECHANICAL l!~ngineering SCHOOL OF ENGINEERING AND ENGINEERING TECHNOLOGY FEDERAL UNIVERSITY OI~' TECHNOL( GY, MINNA NIGERIA. NO 'VEMBER ~ 2010

2 DECLARATION ~ ~ I here';; affirin that the project titled "design and fabrication of a Ball milling Machine" las not been presented in part for the award of any degree elsewhere. Information derived from ersonal communication, published and unpublished works of other persons have been duly lcknowledge in this thesis Sign and Date ii - ~==~ ~ ~ ~-r~~~ ~ ~

3 CERTIFICATION This project "Design and fabrication of a Ball milling Machine" was carried out by F ATOLA SANY A VICTOR has been r~ad and approved having met the requirement for the award of Bachelor of Engineering(B.ENG) degree in Mechanical Engineering of the Federal University of Technology, Minna. ~ E. A. P. Egbe Project supervisor Prof. Khan Project supervisor Sign and Date Eternal Examiner Sign and Date iii

4 DEDICATION I will like to dedicate this project work to almighty God and my parents Mr. and Mrs.. anlabofa, who have continually encouraged me to persevere and supported me in all my /' iv

5 ACKNOWLEDGEMENT I [till dee pl y indebted to God almighty for the great privilege granted me to come to this stage of Ill)' acadell1ic pursuit. I appreciate the effort of my projcct supervisor Engr. E. A. P. Egbe for his imlllense contribution and support during the execution of this project. I also wish to sincerely acknowledge my brother Rotimi and sisters Abiola. Oll1otayo and TolulojJc lui' their support in prayer all the time. Finally. My thaj1ks go to closest person to l11y heart the person of Bolufawi Ilallllnh Monisola for her support and contribution to the project work. May God prosper and enrich thcm, abundantly. Moreso., to all my friends ami well wishers people like Are Taiwo, Masopa, Idown,Fagdure Emmalluel,Adebowale Bayo, Luqman, Kofoworalo, v

6 ABSTRACT The aim of this project is to design and fabricate b'all milling machine that is capable of grinding already crushed material ores into fine particles, which will be cost effective, durable and less I cumbersome. Alternative materials were used like mild steel in the material selection which makes easily affordable for light duty centers. The machine is categorized under the tumbling D. ACJ mill type of milling machine, which the rotation of the cylinder placed horizontally on the two parallel shafts placed side by side to each other. Due to the slow operational rotation of the machine, a speed reducer mechanism was introduced to further step down the generated speed from the electric motor. Initially the generated speed from the electric motor was 1400rpm which NOME] W:IS stepped down 470rpm via the use of pulley- belt mechanism before stepping it down further to 120rpm via the use of chain and sprocket mechanism. The 120rl'm was the speed the machine Cll;\PT g needs to have a slow operational rotation to give an effective result required. 1.0 lnti?o vi

7 CHAPTER TWO 2.0 LITERATURE REVIE~r PREVIOUS DESIGN OF A MILLING MACHINE BACKGROUND INFORMATION MACHINE ELEMENTS INVOLVED AND FUNCTIONS TRADITIONAL IMPLEMENTS MECHANIZED MACHlNES CAPACITY AND OVERALL PERFORMANCE 10 ".,. a. 2.7 METHOD OF DATA COLLECTION RESEARCH WORK 10 CHAPTER THREE I 3.0 DESIGN ANALYSIS, CALCULATION AND MATERIAL SELECTION DESIGN ANALYSIS The shaft: Belt design Bearing design Pulley design Sprocket/ chain design 24 viii

8 Key design analysis 3.2 DESIGN CALCULATION Pulley calculation Belt calculation Chain and sprocket drive Torque generated by the machine Power required to dlive the machine Calculation of shafts Table of values for shear force and bending moment of driving shaft Table of values for shear force and bending moment of driven shaft Calculation of Shaft Diameter Bearing selection calculations Bearing life in hours Key design calculation Cost analysis Materials selection ix

9 CHAPTER FOUR 4.0 FABRICATION AND TESTING 4.1 MACHINE ASSEMBLING PROCEDURE 4.2 TESTING 4.3 PRINCIPLE OF OPERATION 4.4 PROCEDURE FOR TE~;TING 4.5 TEST RESULT AND DISCUSSION CHAPTERS 5.0 CONCLUSION AND RECOMMENDATION 5.1 CONCLUSION 5.2 RECOMMENDATION REFERENCES APPENDIX x

10 TABLE OF CONTENT TITLE PAGE I DECLARATION II CERTIFICATION III DEDICATION IV ACKNOWLEDGEMENT V ABSTRACT NOMENCLATURE AND SYMBOL VII VIII CHAPTER ONE 1.0 INTRODUCTION HISTORICAL BACKGROUND PROBLEM ENCOUNTERED JUSTIFICATION AND SIGNIFICANCE AIMS AND OBJECTIVES OF THE PROJECT SCOPE OF THE PROJECT DEFINITION OF THE BALL MILLING MACHINE. 6 vii

11 NOMENCLATURE SYMBOL P hp W N w 0 B F V D r cr E n - ~ // m MEANING power, dynamic load pressure Horsepower Watts, weight Speed (revolution per minute) Angular velocity Angle of lap Groove angle Tension Velocity Diameter Radius Stress Strain Factor of safety Bending moment!i T Torque xi