Diabli nadali Olga Rudnicka

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. There s a lot to be gained from simplification, but there s also a hugecost.In fact, GD&T s evolution could be described as a gradual shift from simplicity toward flexibility.Asusers become more numerous and more sophisticated, they request that standards add coverage forincreasingly complex and esoteric applications.Consequently, most issues faced by the Y14.5 committeeboil down to a struggle to balance simplicity with flexibility.It s impossible to predict accurately where GD&T is headed, but it seems reasonable to expect the Y14.5committee will continue to fine-tune a system that is rather highly developed, mature, and in widespreadinternational use.Radical changes cannot be ruled out, but they would likely follow ISO activity.Be assured,GD&T s custodial committees deeply contemplate the future of dimensioning and tolerancing.Standards committee work is an eye-opening experience.Each volunteer meets dozens of colleaguesrepresenting every sector of the industry, from the mainstream Fortune 500 giants to the tiniest outpostma-and-pa machine shops.GD&T belongs equally to all these constituents.Often, what seemed a brilliantinspiration to one volunteer withers under the hot light of committee scrutiny.That doesn t mean thatnothing can get through committee; it means there are very few clearly superior and fresh ideas under thesun.Perhaps, though, you ve got one.If so, we encourage you to pass it along to this address.The American Society of Mechanical EngineersAttention: Secretary, Y14 Main Committee345 East 47th StreetNew York, NY 100175-166 Chapter Five5.18 References1.The American Society of Mechanical Engineers.1972.ANSI B89.3.1-1972.Measurement of Out-Of-Roundness.New York, New York: The American Society of Mechanical Engineers.2.The American Society of Mechanical Engineers.1972.ANSI B4.1-1967.Preferred Limits and Fits forCylindrical Parts.New York, New York: The American Society of Mechanical Engineers.3.The American Society of Mechanical Engineers.1978.ANSI B4.2-1978.Preferred Metric Limits and Fits.NewYork, New York: The American Society of Mechanical Engineers.4.The American Society of Mechanical Engineers.1982.ANSI Y14.5M-1982, Dimensioning and Tolerancing.New York, New York: The American Society of Mechanical Engineers.5.The American Society of Mechanical Engineers.1995.ASME Y14.5M-1994, Dimensioning and Tolerancing.New York, New York: The American Society of Mechanical Engineers.6.The American Society of Mechanical Engineers.1994.ASME Y14.5.1-Mathematical Definition of Dimensioningand Tolerancing Principles.New York, New York: The American Society of Mechanical Engineers.7.International Standards Organization.1985.ISO8015.Technical Drawings -- Fundamental Tolerancing Principle.International Standards Organization: Switzerland [ Pobierz całość w formacie PDF ]

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