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