Materials Processing and Design Teknik Mesin Universitas Gunadarma

Materials Processing and Design Teknik Mesin, Universitas Gunadarma MACHINE ELEMENTS INTRODUCTION 1

Materials Processing and Design Teknik Mesin, Universitas Gunadarma Outline: • Introduction to Mechanical Engineering Design • Materials • Load and Stress Analysis • Deflection and Stiffness • Shafts and Shaft Components • Screws, Fasteners, and the Design of Nonpermanent Joints • Welding, Bonding, and the Design of Permanent Joints • Mechanical Springs • Rolling−Contact Bearings

Materials Processing and Design Teknik Mesin, Universitas Gunadarma • • Referensi: Khumi and Gupta. Theory of Machine Element. New Delhi : Eurasin Publishery. Spott, MF, Design of Machine Elemen, Tokyo: Prentice Hall 1973 Hacl, AS & Holowenko AR. Machine Design, New York: Mc Graw Hill, 1977 Gustaf Nieman : Machine Element, Design and Calcution, Vol I & II, Springer Verlag. Phelan : Fundamental of Mechanical Design, Mc Graw Hill. Sularso, Dasar Perencanaan dan Pemilihan Elemen Mesin, Jakarta: Pradya Paramita 1983 Ir. Jac. Stolk, Ir. C. Kros : Elemen Mesin , Erlangga, Jakarta : 1984

Materials Processing and Design Teknik Mesin, Universitas Gunadarma INTRODUCTION • Introduction to Mechanical Engineering Design • Materials • Load and Stress Analysis • Deflection and Stiffness

Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design DESIGN • DASAR-DASAR PERANCANGAN MEKANIS: • Perancangan elemen tunggal • Assembly komponen • BIDANG-BIDANG PERANCANGAN PRODUK MEKANIS • Produk Konsumen: mixer, gergaji rantai, vacuum cleaner, dll • Sistem manufakturing: konveyor, derek, robot-robot industri, dll • Peralatan konstruksi: truk sampah, traktor, kompresor, dll

Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design Phases and Interactions of the Design Process 1. Functionality 14. Noise 2. Strength/stress 15. Styling 3. Distortion/deflection/stiffness 16. Shape 4. Wear 17. Size 5. Corrosion 18. Control 6. Safety 19. Thermal properties 7. Reliability 20. Surface 8. Manufacturability 21. Lubrication 9. Utility 22. Marketability 10. Cost 23. Maintenance 11. Friction 24. Volume 12. Weight 25. Liability 13. Life 26. Remanufacturing/resource recovery

Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design Tools and Resources Computational Tools Engineering software Non-engineering software Match software Acquiring Technical Information Libraries (community, university, and private). Government sources. Professional societies. Commercial vendors Internet

Materials Processing and Design Teknik Mesin, Universitas Gunadarma · · · · Introduction to Mechanical Engineering Design The Design Engineer’s Professional Responsibilities Understand the problem Identify the known Identify the unknown and formulate the solution strategy State all assumptions and decisions Analyze the problem Evaluate your solution Present your solution DESIGN ENGINEER • Active member of a professional society • Courses • Reading technical and professional journals AN ENGINEER’S EDUCATION DOES NOT END AT GRADUATION

Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design Standards and Codes Aluminum Association (AA) American Gear Manufacturers Association (AGMA) American Institute of Steel Construction (AISC) American Iron and Steel Institute (AISI) American National Standards Institute (ANSI)5 ASM International American Society of Mechanical Engineers (ASME) American Society of Testing and Materials (ASTM) American Welding Society (AWS) American Bearing Manufacturers Association (ABMA)7 British Standards Institution (BSI) Industrial Fasteners Institute (IFI) Institution of Mechanical Engineers (I. Mech. E. ) International Bureau of Weights and Measures (BIPM) International Standards Organization (ISO) National Institute for Standards and Technology (NIST)8 Society of Automotive Engineers (SAE)

Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design Economics Standard Sizes Large Tolerances Breakeven Points Cost Estimates

Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design Uncertainty Examples of uncertainties concerning stress and strength include: • • • Composition of material and the effect of variation on properties. Variations in properties from place to place within a bar of stock. Effect of processing locally, or nearby, on properties. Effect of nearby assemblies such as weldments and shrink fits on stress conditions. Effect of thermomechanical treatment on properties. Intensity and distribution of loading. Validity of mathematical models used to represent reality. Intensity of stress concentrations. Influence of time on strength and geometry. Effect of corrosion. Effect of wear.

Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design Dimensions and Tolerances Nominal size. Limits. Tolerance Bilateral tolerance Unilateral tolerance. Clearance. Interference Allowance