Final Report PUK - Household Mechanical Sharpener Machine - Oktavianus P.M

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Transcript of Final Report PUK - Household Mechanical Sharpener Machine - Oktavianus P.M

Household Knife Sharpener Machine Final ReportFundamental of Mechanical Design MS 4101

Created by: Oky Eldyagusta Pungky R. Prihono Oktavianus P. Mulalinda (OKY) (PRP) (OPM) 13106036 13106108 13106138

MECHANICAL ENGINEERING DEPARTMENT FACULTY OF MECHANICAL ENGINEERING AND AEROSPACE BANDUNG INSTITUTE OF TECHNOLOGY 2010

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PREFACE

One of the important skills that must be owned by an engineering student is the ability to design. Without excellent design, any products will not working properly or even cannot be manufactured. To achieve good design, the engineers have to consider many aspects, in addition to technical aspect, that support the design process including manufacturability of the design, materials selection, cost estimation, etc. Our topic for this task is Household Knife Sharpener Machine. This report will describe the design process and mechanism of household knife sharpener machine including all aspects that have already stated. At last but not least, we want to thank Prof. Dr. Ir. Komang Bagiasna for his guidance and patience that he gave us during this class. We hope that our report could give benefit for us.

Bandung, January 2010

Authors

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Table of ContentsCover .............................................................................................................................................. 1 Preface ............................................................................................................................................ 2 Table of Contents ....................................................................................................................................... 3 Table of Pictures ......................................................................................................................................... 5 Table of Tables ........................................................................................................................................... 6 Chapter 1 Introduction............................................................................................................................... 7 1.1. Background ...................................................................................................................................... 7 1.2. Problem Identification ..................................................................................................................... 7 1.3. Assignment Purpose ........................................................................................................................ 8 1.4. Assignment Benefit .......................................................................................................................... 8 1.5. Research Methodology .................................................................................................................... 8 1.6. Working Diagram Schematic ............................................................................................................ 8 Chapter 2 Design Requirement and Objectives ...................................................................................... 10 2.1. Design............................................................................................................................................. 10 2.1.1. Introduction ............................................................................................................................ 10 2.1.2. Household Knife Sharpener Machine Design ......................................................................... 10 2.2. Requirement and Objectives ......................................................................................................... 16 Chapter 2 Calculation for Safety and Functionality ................................................................................ 17 3.1. Safety Introduction ........................................................................................................................ 17 3.2. Component Safety Evaluation........................................................................................................ 18 3.2.1. Gear Literature........................................................................................................................ 18 3.2.2. Gear Calculation...................................................................................................................... 19 Chapter 4 Main Component Manufacturing ........................................................................................... 28 4.1. Manufacturing Introduction .......................................................................................................... 28 4.2. Main Component Manufacturing and Assembly ........................................................................... 29 4.2.1. Casing ...................................................................................................................................... 29

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4.2.2. Bevel and Spur Gear ............................................................................................................... 29 4.2.3. Crank ....................................................................................................................................... 30 4.2.4. Feeding Mechanism Tools ...................................................................................................... 31 4.2.5. Sprocket and Chains ............................................................................................................... 31 4.2.6. Shaft, Swing Arm, and Spring.................................................................................................. 31 4.2.7. Grindstone .............................................................................................................................. 32 Chapter 5 Cost Estimation........................................................................................................................ 33 5.1. Cost Introduction ........................................................................................................................... 33 5.2. Cost Evaluation .............................................................................................................................. 33 Chapter 6 Enclosure ................................................................................................................................. 34 6.1. Conclusion ...................................................................................................................................... 34 6.2. Suggestion ...................................................................................................................................... 34 Appendix................................................................................................................................................... 35 Drawing..................................................................................................................................................... 36

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Table of PicturesFigure 1.1. Mechanical design flowchart ........................................................................................... 9 Figure 2.1. Knife sharpener mechanism .......................................................................................... 10 Figure 2.2. Feeding mechanism ...................................................................................................... 11 Figure 2.3. Projected view of feeding mechanism (front and side) ................................................... 12 Figure 2.4. Feeding Mechanism (isometric view) ............................................................................. 13 Figure 2.5. Upper position of gear rack ........................................................................................... 14 Figure 2.6. Down position of gear rack............................................................................................ 14 Figure 2.7. Mechanism of rack gear ................................................................................................ 15 Figure 3.1. Top View ...................................................................................................................... 20 Figure 3.2. DAK Engineerings Spur Gear Calculator......................................................................... 21 Figure 3.3. Geometry factors J for straight bevel gears .................................................................... 24 Figure 4.1. Casing........................................................................................................................... 29 Figure 4.2. Spur and Bevel Gear...................................................................................................... 30 Figure 4.3. Crank ............................................................................................................................ 30 Figure 4.4. Feeding Mechanism Tools ............................................................................................. 31 Figure 4.5. Household Knife Sharpener System ............................................................................... 32

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Table of TablesTable 3.1. Dimensional calculation table......................................................................................... 19 Table 3.2. Parameters for bevel gear bending stress ....................................................................... 23 Table 3.3. Bevel gear bending stress calculation ............................................................................. 24 Table 3.4. Mechanical properties for acetal delrin .......................................................................... 25 Table 3.5. Specification for delrin acetal spur gear ..................................