ME 312 Mechanical Machine Design - Lecture 01
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Transcript of ME 312 Mechanical Machine Design - Lecture 01
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
1
ME 312 – Machine DesignDr. Bilal A. Siddiqui,Asst. Prof (ME)
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
2 Course Outline
Basic criteria of design of machine parts Determination of permissible and actual stresses, factor of safety etc. Design of …..
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
3 Course Outline
Pre-requisites Mechanics of Materials-I (ME-212) Mechanics of Materials-II (ME-213)
Textbook Mechanical Engineering Design by J. E. Shigley, McGraw Hill
References Machine Design, An Integrated Approach by R. L. Norton, McGraw Hill. Design of Machine Elements by M. F. Spotts, Prentice Hall Fundamentals of Machine Component Design, by R. C. Juvinall & K. M.
Marshek, John Wiley
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
4 Course Outline
Evaluation Methods
Course Objectives Design common machine elements and to gain experience in solving design
problems. Prepare professional quality solutions and effectively communicate the results
of analysis and design.
Homeworks 6.5%Project 7.0%Quizzes 6.5%Major Exams 30.0%Final Exam 50.0%
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5 What is a (Mechanical) Machine
A machine is a tool containing one or more moving parts that uses energy to perform the action it is designed for. Tool: …well, open to interpretation. Anything that makes life easy Moving parts: simple machines? Energy: chemical, electrical, mechanical, thermal etc. Action: transport, manufacturing, destroying etc. Design: ME-312
Spring 312 ( Cpoyrights Bilal Siddiqui 2015
Newtonian Mechanics
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
6 Simple Machines
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7 Design Example (simple lever)
Mechanical Advantage = Constraints
Strength of material Strength of Fulcrum joint Bearing strength Effort force available Maximum and minimum arm lengths (Le>Lr) Cost
Spring 312 ( Copyrights' Bilal Siddiqui 2015Le
Lr
Design Space
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
8 Compound Machines
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9 Complex Machines
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10 Really Complex Machines
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
11 Nature & Engineering Design
T=0T= 1503
ADT= 1903
ADT= 2003
AD
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
12 So what is the best Design
13 The Design Cycle
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
Identify need Survey existing solutions
Define Problem (constraints,
requirements…)
Select Possible Solutions
Evaluate Solutions
(simulations)Select ‘Best’
Solution
Develop and Prototype Solution
Testing and further
improvement
Presentation and
Communicate
optimization
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
14 Design Stages
Initial Design Preliminary Design Detailed Design
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
15 Course Project…..
1. Define need
DESPERATE: We need to replace these guys with these…
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
16
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
17 Course Project…..
1. Survey Existing Solutions
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
18 2. Offshoot Ideas
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
19 3. Generate Ideas (Brainstorm)
Come up with several concepts New …or hybrid
05/02/2023Spring 312 ( Cpoyrights Bilal Siddiqui 2015
20 Define the Problem
Which disabilities? What sizes? Constraints? Regulations? Business model? Which parts are required? Who are the competitors? Our advantage?