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MINISTRY OF EDUCATION AND TRAINING HCMC UNIVERSITY OF TECHNOLOGY AND EDUCATION FINAL REPORT STUDENT'S SCIENTIFIC RESEARCH TOPIC RESEARCH, DESIGN AND IMPLEMENTATION OF A COCONUT SHELL SHREDDER AND DEHYDRATOR MACHINE FOR ORGANIC FERTILIZER PRODUCTION TOPIC NUMBER: SV2022-200 PROJECT LEADER: CHU HUY HOANG SKC008102 Ho Chi Minh City, October 2022 MINISTRY OF EDUCATION AND TRAINING HOCHIMINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FINAL REPORT STUDENT’S SCIENTIFIC RESEARCH TOPIC RESEARCH, DESIGN AND IMPLEMENTATION OF A COCONUT SHELL SHREDDER AND DEHYDRATOR MACHINE FOR ORGANIC FERTILIZER PRODUCTION TOPIC NUMBER : SV2022-200 Science group : Engineering Student: Ethics: Faculty: Major: Chu Huy Hoang Kinh Faculty for High Quality Training Machine Manufacturing Technology Instructor : Phan Thanh Vu, ME Ho Chi Minh city, October,2022 Men, Women: Men Year: 04 /Training year: 04 Disclaimer Project title: RESEARCH, DESIGN AND IMPLEMENTATION OF A COCONUT SHELL SHREDDER AND DEHYDRATOR MACHINE FOR ORGANIC FERTILIZER PRODUCTION Advisor: PHAN THANH VU, ME Student: CHU HUY HOANG – Student ID: 18143010 Student: DANG NGOC THIEN – Student ID: 18143045 Student: HOANG HUU NGHIA – Student ID: 18143031 Chu Huy Hoang (Project Leader) - Phone: 0334833907 - Email: 18143010@student.hcmute.edu.vn Dang Ngoc Thien - Phone: 0923055055 - Email: 18143045@student.hcmute.edu.vn Hoang Huu Nghia - Phone: 0964966692 - Email: 18143031@student.hcmute.edu.vn Disclaimer: “We declare that the report’s content are the outcome of our research and implementation process Nothing was copied without the source being cited in the reference section We take full responsibility if there is a copyright violation in our report.” Acknowledgements Throughout the period of our capstone project, our group had received a considerable of passionate help and support, which has instructed and motivated us to overcome all obstacles and successfully finished this project Firstly, we would like to take this opportunity to thank the Ho Chi Minh University of Technology and Education, as well as Faculty for High Quality training for creating ideal condition for us to finish the project Secondly, we would like to express our gratitude to Advisor Phan Thanh Vu, ME, who provided our group with valuable instruction and advise that support us in completing our graduation project We resolve problems that arose during the project as a result of these recommendations, as well as learn more about machine design and implementation-related stuff Thirdly, we appreciate the participate of defense committee: Assoc Prof Truong Nguyen Luan Vu, Dr Phan Cong Binh, Dr, Nguyen Minh Ky, ME Nguyen Van Doan, Mr Huynh Tuan for giving us priceless comments to us Besides, we would like to give credit to Mr Pham Bach Duong, ME, MBA for provide us a handful of experiments and recommendation about our report Mr Truong Thanh Cong, ME – lecturer at Vietnamese-German Center for support us when we using machine tools at here Furthermore, we would like to thank Mr Tien – Director of Khoa Thanh Dat Limited Company for sponsoring us in this project Mr Doanh – Mechanical Machinist at Tuan Nam Precision for helping us in machine assembly and welding We also want to express our gratitude to Mr Tuong Hoang – Automation Manager at framas Vietnam Ltd for supporting us about sheet metal design In conclusion, we deeply thank and appreciate to all people who supporting us in this capstone project Best regard Table of Contents CHAPTER INTRODUCTION 1.1 Introduction .2 1.2 The urgency of the topic .8 1.3 Objection of the project .9 1.4 Research method 1.5 Aim, mission and scope of the project .10 1.6 Input data 10 1.4 Expecting output data 12 CHAPTER LITERATURE REVIEW 13 2.1 Shredding mechanism 13 2.2 Transmission system for shredder mechanism .17 2.3 Motor type selection for hammer mill shredder mechanisms 21 2.4 Dehydrator mechanism 23 CHAPTER MECHANICAL DESIGN 25 3.1 Block diagram 25 3.2 Design and calculate the hammer mill mechanism 27 3.3 Design and calculate the press pulley dehydrator mechanism 40 CHAPTER MANUFACTURING PROCESS 55 4.1 Hammer mill mechanism machining process .55 4.1 Hammer mill cover machining process 70 4.1 Machine frames manufacturing 81 4.1 Dehydrator mechanism manufacturing 86 CHAPTER MACHINE ASSEMBLY PROCEDURES 89 5.1 Hammer mill mechanism assembly 89 5.2 Press belt mechanism assembly 93 5.3 Electrical box wiring and assembly 96 CHAPTER EXPERIMENT AND ANALYSIS 99 6.1 Experiment design .99 6.2 Analysis .104 CHAPTER IMPROVEMENT, RESULT AND CONCLUSION .111 7.1 Improvements 111 7.2 Result 112 7.3 Conclusion 113 References 115 List of Figures Fig 1.1 Vietnam coconut production (ICC) Fig 1.2 Structure of coconut fruit Fig 1.3 Mechanical properties of coconut shell Fig 1.4 Coconut shredder machine from MKS and 3A Fig 1.5 Coconut shredder machine from XTmachinery and JF Brazil Fig 1.6 Fresh and dry coconut weight 11 Fig 1.7 Overall size of fresh and dry coconut husks 12 Fig.2.1 Mechanism of shaft shredder .13 Fig.2.2 Double shafts shredder machine 13 Fig 2.3 Rotary blade mechanism by 3A machinery 14 Fig 2.4 Rotary blade mechanism in food industry 14 Fig 2.5 Hammer mill mechanism 15 Fig 2.6 Gear drive mechanism 17 Fig 2.7 Chain drive 18 Fig 2.8 Belt drive .19 Fig 2.9 3-phases motor working principle 21 Fig 2.10 Wire diagram of 1-phase motor 22 Fig 2.11 1-phase induction motor structure 22 Fig 2.12 General structure of a screw press mechanism 23 Fig 2.13 Belt press mechanism applied in industry 24 Fig 3.1 Block diagram of coconut husk shredder and dehydrator machine 26 Fig 3.2 Mechanism diagram of hammer mill 27 Fig 3.3 Force diagram on hammer mill shaft 34 Fig 3.4 Free body diagram of hammer mill shaft .34 Fig 3.5 Force and moment diagram of hammer mill shaft on yOz plane 35 Fig 3.6 Force and moment diagram of hammer mill shaft on xOz plane 36 Fig 3.7 Mechanism diagram of press pulley .40 Fig 3.8 Force diagram on press pulley 45 Fig 3.9 Free body diagram of press pulley 45 Fig 3.10 Force and moment diagram of press shaft on xOz plane 46 Fig 3.11 Force and moment diagram of press shaft on yOz plane 46 Fig 3.12 Force diagram of belt conveyor shaft 50 Fig 3.13 Free body diagram of belt conveyor shaft 50 Fig 3.14 Force and moment diagram of belt conveyor shaft .51 Fig 4.1 Assembly drawing of hammer mill mechanism 55 Fig 4.2 Technical drawing of main shaft 57 Fig 4.3 Main shaft machining on lathe machine at Vietnamese-German Center .59 Fig 4.4 Main shaft machining on milling machine at Vietnamese-German Center 60 Fig 4.5 Main shaft finished 60 Fig 4.6 Technical drawing of hammer mill rod 60 Fig 4.7 Hammer mill shaft machining at Vietnamese-German Center 63 Fig 4.8 Technical drawing of bushes 64 Fig 4.9 Cutting work piece and drilling bushes at Vietnamese-German Center 66 Fig 4.10 Final product of bushes 66 Fig 4.11 Technical drawing of side plate 67 Fig 4.12 Technical drawing of center plate 67 Fig 4.13 Center and Side plates 68 Fig 4.14 Technical drawing of hammer mil 68 Fig 4.15 Hammer mill 69 Fig 4.16 Hammer mill cover 70 Fig 4.17 Upper cover .70 Fig 4.18 Upper cover assembly drawing 72 Fig 4.19 Upper cover final product 73 Fig 4.20 Middle cover technical drawing .73 Fig 4.21 Middle cover technical drawing .75 Fig 4.22 Middle cover assembled 75 Fig 4.23 Lower cover technical drawing 76 Fig 4.24 Lower cover assembly drawing 78 Fig 4.25 Lower cover manufactured .78 Fig 4.26 Screen technical drawing 79 Fig 4.27 Screen cover technical drawing 79 Fig 4.28 Screen manufactured 80 Fig 4.29 Screen cover 80 Fig 4.30 Machine frame technical drawing 81 Fig 4.31 Welding drawing of machine frame .84 Fig 4.32 Frame manufacturing 84 Fig 4.33 Machine frame finished 84 Fig 4.34 Machine frame wheel and take-up mechanism assembled and painted .85 Fig 4.35 Driving shaft technical drawing .85 Fig 4.36 Driven shaft technical drawing .86 Fig 4.37 Roller support plate technical drawing .86 Fig 4.38 Support plate welded onto machine frame 87 Fig 4.39 Assembled rollers on machine 88 Fig 5.1 Machine assembly procedure .89 Fig 5.2 Hammer mill mechanism assembly 89 Fig 5.3 Assembly hammer mills and bushes onto hammer mill shaft and plates .90 Fig 5.4 Assembly last side plate onto the mechanism by screws and washes .90 Fig 5.5 Assembly the lower cover onto machine frame 91 Fig 5.6 Finished assembly of hammer mill mechanism 91 Fig 5.7 Belt drive assembly process 92 Fig 5.8 Belt drive assembly in practice 92 Fig 5.9 Dehydrator mechanism assembly procedure 93 Fig 5.10 Welding support plate 93 Fig 5.11 Assembly bottom pulley 94 Fig 5.12 Assembly front pulley, belt and under pulley 94 Fig 5.13 Assembly top pulley 95 Fig 5.14 Assembly chain drive 95 Fig 5.15 Wiring diagram 96 Fig 5.16 Thermal relay 96 Fig 5.17 Diameter of wire 97 Fig 5.18 Exterior electrical box 97 Fig 5.19 Interior electrical box 97 Fig 5.20 Assembled machine .98 Fig 5.21 Frond and back views of finished machine .98 Fig 5.22 side views of finished machine .98 Fig 6.1 Starting time (s) .104 Fig 6.2 Time required to change the screen (s) .105 Fig 6.3 Maximum size of input material (mm) .105 Fig 6.4 Maximum size of output material (mm) .106
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