Final exam Very good performance overall Essays were particularly good Mean -88.5 Standard deviation -570o mit 人 16881
Final Exam • Very good performance overall • Essays were particularly good • Mean - 88.5% • Standard deviation - 5.7% 16.881 MIT
Homework HW#8 - Mean = 96.1 Standard deviation =7.4 HW#9 Mean =94.9 Standard deviation =5.5 mit 人 16881
Homework • HW#8 – Mean = 96.1 – Standard Deviation = 7.4 • HW#9 – Mean = 94.9 – Standard Deviation = 5.5 16.881 MIT
The remainder of the course Primary mission - Complete your term projects Secondary mission --Cover topics of interest 70% of your grades are set(term project=30%) Class sessions(half new topics /half consultation) Tolerance Design/Projects Mahalanobis taguchi system /Projects Conceptual robust Design /Projects Final project presentations mit 人 16881
The Remainder of the Course • Primary mission -- Complete your term projects • Secondary mission -- Cover topics of interest • 70% of your grades are set (term project = 30%) • Class sessions (half new topics / half consultation) – Tolerance Design / Projects – Mahalanobis Taguchi System / Projects – Conceptual Robust Design / Projects – Final Project Presentations 16.881 MIT
Expectations on Final Project Should represent 30 hours of effort Options Full robust design effort Planning phase only Post mortem analysis of a previous effort Study of an advanced topic in robust design Other possibilities with permission mit 人 16881
Expectations on Final Project • Should represent ~30 hours of effort • Options – Full robust design effort – Planning phase only – Post mortem analysis of a previous effort – Study of an advanced topic in robust design – Other possibilities with permission 16.881 MIT
Grading of the Final project °75% Written report 25% Oral presentation Grading criteria include Impact and significance of the results Quality of the planning and analysis Clarity of technical exposition mit 人 16881
Grading of the Final Project • 75% Written report • 25% Oral presentation • Grading criteria include – Impact and significance of the results – Quality of the planning and analysis – Clarity of technical exposition 16.881 MIT
Tolerance design The Interface Between Design and Manufacture ANALYSIS Destinatn REport L50059 Session:960329-224524 1 Do0 sPiEs 4803 :0039 WZAGENT/DISTANCE-WATER PUMP TO ALT CENTERS 389800 Lower Des ign Limit: 271. 1 3a/-08/"t/ Tested Norm.269,5000272,00274.5000277,0000 2B9.633727.3814 95%c I. for 5 Out of Spec 4, 8599 to 3. 9401 .Est Range 99, 7300% ESC: Select a different repor t t 人 16881
Tolerance Design The Interface Between Design and Manufacture 16.881 MIT
Outline History of tolerances Tolerancing standards · Tolerance analysis Tolerance design Taguchi's approach Case study mit 人 16881
Outline • History of tolerances • Tolerancing standards • Tolerance analysis • Tolerance design • Taguchi’s approach • Case study 16.881 MIT
History of tolerances pre 1800--Craft production systems 1800-- Invention of machine tools the english System of manufacture 1850-- Interchangeability of components the American system of manufacture Jaikumar, Ramachandran. From Filing and Fitting to Flexible manufacture. 1988 mit 人 16881
History of Tolerances • pre 1800 -- Craft production systems • 1800 -- Invention of machine tools & the English System of manufacture • 1850 -- Interchangeability of components & the American system of manufacture Jaikumar, Ramachandran. From Filing and Fitting to Flexible Manufacture, 1988. 16.881 MIT
Craft Production Drawings communicated rough proportion and function Drawings carried no specifications or dimensions Production involved the master the model and calipers mit 人 16881
Craft Production • Drawings communicated rough proportion and function • Drawings carried no specifications or dimensions • Production involved the master, the model, and calipers 16.881 MIT
The English System Greater precision in machine tools General purpose machines Maudslay invents the slide rest Accurate measuring instrument, 此喝 Micrometers accurate to o 00l inci Engineering drawings Monge La geometrie descriptive Orthographic views and dimensioning Parts made to fit to one another Focus on perfection of fit 人 16881 mit
The English System • Greater precision in machine tools • General purpose machines – Maudslay invents the slide rest • Accurate measuring instruments – Micrometers accurate to 0.001 inch • Engineering drawings – Monge “La Geometrie Descriptive” – Orthographic views and dimensioning • Parts made to fit to one another – Focus on perfection of fit 16.881 MIT
