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Geometric Design Tolerancing: Theories, Standards and Applications (Hardcover, 1998 ed.)
Loot Price: R4,366
Discovery Miles 43 660
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Geometric Design Tolerancing: Theories, Standards and Applications (Hardcover, 1998 ed.)
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The importance of proper geometric dimensioning and tolerancing as
a means of expressing the designer's functional intent and
controlling the inevitable geometric and dimensional variations of
mechanical parts and assemblies, is becoming well recognized. The
research efforts and innovations in the field of tolerancing
design, the development of supporting tools, techniques and
algorithms, and the significant advances in computing software and
hardware all have contributed to its recognition as a viable area
of serious scholarly contributions. The field of tolerancing design
is successfully making the transition to maturity where deeper
insights and sound theories are being developed to offer
explanations, and reliable implementations are introduced to
provide solutions. Machine designers realized very early that
manufacturing processes do not produce the nominal dimensions of
designed parts. The notion of associating a lower and an upper
limit, referred to as tolerances, with each dimen sion was
introduced. Tolerances were specified to ensure the proper function
of mating features. Fits of mating features included clearances,
location fits, and interference fits, with various sub-grades in
each category assigned a tolerance value depending on the nominal
size of the mating features. During the inspection process, a part
is rejected if a dimension fell outside the specified range. As the
accuracy requirements in assemblies became tighter, designers had
to consider other critical dimensions and allocate tolerances to
them in order to ensure the assembly's functionality."
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