Transcription
Introduction to Machine DesignME 423: Machine DesignInstructor: Ramesh Singh1
Outline Contact detailsCourse objectivesIntroductory remarksGrading policyIntro to Machine DesignME 423: Machine DesignInstructor: Ramesh Singh2
Contact Details Prof. Ramesh Singh– E-mail: rsingh@iitb.ac.in– Off. Hrs. (Prof. Singh): Fridays 3.25-5 p.m. in MachineTools Lab (Call landline numbers 022-25767507 or022-25768507)– Also by appointment (We can setup one-to-oneonline meeting if required– Lecture notes and videos will be posted on moodleand if needed You Tube– On website:http://www.me.iitb.ac.in/ ramesh/courses/ME423/me423.htmlME 423: Machine DesignInstructor: Ramesh Singh3
Focus and Objectives of Course Basics of Engineering Design Selection of Engineering Materials for MechanicalDesign Analysis of Machine Elements Synthesis, Design, Modeling, Fabrication andCharacterization of a complete system or aproduct (proposed and executed by each group of5 students) using Autodesk’s cloud basedcollaborative softwareME 423: Machine DesignInstructor: Ramesh Singh4
Introductory Remarks See second page of syllabus– Homework– Exams– Honor codeME 423: Machine DesignInstructor: Ramesh Singh5
Grading Policy Assignments Quizzes Assessment/Exams Project30%30%40% (20% In-semin form of reports,presentations) 20% Evaluation atthe semester end ofthe final project) Total100 %ME 423: Machine DesignInstructor: Ramesh Singh6
Syllabus: Topics on Machine n to Design processReview of Strength of MaterialsMaterials SelectionSteady loading failureVariable loading failureSimple machine parts: Cotter joint, Knuckle joint, LeversWelding and Fastening: Welded and Riveted joints, screw fasteners andconnectionsLubrication and BearingsFlexible mechanical elements: Belts and drivesActuators: DC motors, piezos, magnet-coil, and hydraulicsGearsSpringsFlywheels, Clutches, Brakes, CouplingME 423: Machine DesignInstructor: Ramesh Singh7
Text BooksText Books: Machine Design: An integrated approach, R.L. Norton;Pearson Education Inc. (India), 2nd edition, 2000 Shigley’s Mechanical Engineering Design, R.G. Budynas,, J.K.Nisbett; Tata Mcgraw-Hill Publishing Co. Ltd., 2012References: Materials Selection in Mechanical Design, M.F. Ashby;Elsevier, 2010 Engineering Design: A project based approach Fundamentals of Machine Component Design, R.C. Juvinall,K.M. Marshek, John Wiley & Sons, 3rd edition, 2000ME 423: Machine DesignInstructor: Ramesh Singh8
Course Summary Focus on:– Identifying the need and developing concepts– Analysis of Machine Elements and Synthesis– Materials Selection– Synthesis, Design, Modeling, Fabrication andCharacterization of a product or system Teamwork will be encouraged– Homework– ProjectME 423: Machine DesignInstructor: Ramesh Singh9
Engineering Design: Key Roles inDesign ProcessClientDesignerUser Client: A person or groupor company that wants adesign conceived User: A person who willemploy or operatewhatever is beingdesigned Designer: Solve theclient’s problem in a waythat meets the user’sneedsME 423: Machine DesignInstructor: Ramesh Singh10
Engineering Design: Definitions Engineering design is a systematic, intelligent process in whichengineers generate, evaluate, and specify solutions fordevices, systems, or processes whose form(s) and function(s)achieve clients’ objectives and users’ needs while satisfying aspecified set of constraints. In other words, engineering design is a thoughtful process forgenerating plans or schemes for devices, systems, orprocesses that attain given objectives while adhering tospecified constraints.ME 423: Machine DesignInstructor: Ramesh Singh11
Key Definitions Design objective: A feature or behavior that the designshould have or exhibit Design constraint: A limit or restriction on the features orbehaviors of the design. A proposed design isunacceptable if these limits are violated Functions: Things a designed device or system issupposed to do.Engineering functions almost always involve transformingor transferring energy, information, or material. It includessupporting and transmitting forces, the flow of current, theflow of charge, the transfer of material, and so onME 423: Machine DesignInstructor: Ramesh Singh12
Key Definitions Means: A way or a method to make a functionhappen e.g. friction is a means of fulfilling a functionof applying a braking force Form: The shape and structure of something asdistinguished from its material.We will not deal with form but form is central toindustrial design, a very important part of product designME 423: Machine DesignInstructor: Ramesh Singh13
Measuring Success of EngineeringDesign Metric: A standard of measurement; in the context ofengineering design, a scale on which the achievement of adesign’s objectives can be measured and assessed Specifications: A scale on which the achievement of a design’sfunctions can be measured. Specifications are engineeringstatements of the extent to which functions are performed bya designME 423: Machine DesignInstructor: Ramesh Singh14
Design ProcessME 423: Machine DesignInstructor: Ramesh Singh15
Design Process12 Materials Selection in Mechanical DesignME423:MachineFig. 2.4 The design flow chart, showinghowdesigntools and Designmaterials selection enter the procedure.Singh levels of breadth and precision.Information about materials is needed Instructor:at each stage, Rameshbut at very different16
Identify the need. Understand the need.PathfindingDesign Process Steps Describe the need: what is desired, what is undesired.Constraints. Break down the problem in parts. Research: what exists out there overall and for sub-problems. Identify options: that could meet the requirements/constraints. Analyze, evaluate: effectiveness of options. Modify, combine asTechnologyneeded. Select most effective option.Selection Detailed design: CAD, stress analysis, manufacturing specs.Technology Prototyping and TestingDevelopment Manufacturing process designRamp & Production.High-volumeME 423: Machine DesignInstructor: Ramesh Singh17
Laser Vent CleaningME 423: Machine DesignInstructor: Ramesh Singh18
ME 423: Machine Design Instructor: Ramesh Singh Focus and Objectives of Course Basics of Engineering Design Selection of Engineering Materials for Mechanical Design Analysis of Machine Elements Synthesis, Design, Modeling, Fabrication and Characterization of a complete sy
