Don Day co-founded Tec-Ease, Inc. over a dozen years ago to provide software as well as training materials and classes to help improve the design and manufacture of mechanical products. He has helped improve the design and production of numerous products from sump pumps to cell phones and satellites. In January of 2001 he became President and Chief Engineer of Inter-Mec Systems Manufacturing, Inc., manufacturer of air clutch brakes. His unique positions at Tec-Ease and Inter-Mec assure that the training and materials developed are relevant to modern industry. Don's titles/accomplishments include:o Member of four ASME Standards Committees: Geometric Dimensioning and Tolerancing (GD&T), GD&T Certification, Engineering Drawings (Main Committee) and Chair of the Castings, Forgings and Molded Parts Committeeo Senior Level Certified in GD&To Six Sigma Concepts and Design for Manufacturabilityo Professor Emeritus, Monroe Community College (MCC)o MCC's Distinguished Professor Award (1980)o Chair of the Integrated Manufacturing Technologies programs at Monroe Community College (MCC) in Rochester, NYo Development Engineer, Eastman Kodak Company A successful designer, engineer, consultant, and trainer, he has received awards for his design activities and holds three patents jointly with Eastman Kodak Company. His presentations are a mixture of modern concepts, humor, and uncommon sense.
GD&T and Reliability
Don Day co-founded Tec-Ease, Inc. over a dozen years ago to provide software as well as training materials and classes to help improve the design and manufacture of mechanical products. He has helped improve the design and production of numerous products from sump pumps to cell phones and satellites. In January of 2001 he became President and Chief Engineer of Inter-Mec Systems Manufacturing, Inc....read more
Low process capability indices of Cp and Cpk cause poor product performance, early life failures and lost market share. The numerator of the Cp and Cpk indices depends upon the specified tolerance. Often Design Engineering "holds back" tolerance on the drawing. Sometimes this is because Design has not taken the time to perform adequate tolerance analysis. Other times it is simply because they do not understand how to specify tolerances in accordance with the ASME Y14.5 standard on dimensioning and tolerancing which establishes the rules and concepts for Today's engineering drawings.This session will illustrate how GD&T (Geometric Dimensioning and Tolerancing) can increase the design spec width and thereby increase the Cp and especially the Cpk values. The result is a more robust design in the factory and in the hands of the customer. A case study illustrating how to improve Cpk without ever changing the process will be presented. In this case study the original drawing requirement was too tightly toleranced to allow the supplier to meet the required Cpk. By examining the real design requirements and making use of the tools found in the Y14.5 standard, the specification was increased and the Supplier was able to produce parts that met the required Cpk.
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