ANSI-ASME B18.12-1982 机械紧固件术语集.pdf

1了
ANSI/ASME
318.12
GLOSSARY OF TERMS FOR
TECHNICAL
1982
MECHANICAL FASTENERS
DATA
IF! Notes
1. Pages M-1 thru M-17 present definitions of terms relating to mechanical fas
teners. The majority of these definitions were extracted, without change,
from ANST/ASME B18.1" Glossary of Terms for Mechanical Fasteners
B18. 12 is a standard developed through the procedures of The American
Soclety of Mechanical Engineers. B18.12 is under the jurisdiction of ASME
Standards Committee 318
2 For definitions of terms relating to screw threads, refer to ANSI/ASME B1.7M,
page A-17. For definitions of terms unique to blind rivets, refer to IF1-110
K-40.
3. The current edition of B18.12 was pubished in 1962, and was reaffirmed,
without technical change, in 1975 and again in 198
4. Copies of ANSI/ASME B18.12-1982 are available from its publisher, The
American Society of Mechanical Engineers, United Engineering Center
345 E 47th Street, New York, NY 10017 U.S.A.
1. Introductory Notes
2. General Terms
code
2.1 Terms Relating to Fasteners in General
This glossary is intended to present general
The foliowing terms and categories are
practice relative to nomenclature prevailing in in-
often used to define fasteners and properties
dustry. Its availability will tend to make possible,
thereof by their function, or dimensional and
through further development, the elimination of
physical attributes
inconsistencies in nomenclature and provide the
basis tor cataloging by users and producers. It
has been arranged to give as much specific
2.1.1 Fastener. A fastener is a mechanical de
formation as possible, in as brief a scope as
vice for holding two or more bodies in definite
practicable, both by definitions and illustratio
positions with respect to each other.
Articles shown in this glossary are not neces-
sarily available or manutactured
2.1.2 Commercial Fastener. A commercial fas-
The requirements of mechanical desigr
tener is a fastener manufactured to published
esulted in an extensive variety of types and
standards and stocked by manufacturers or dis-
sizes of mechanical fasteners. The large numbe
tributors. The material, dimensions and finish of
of products and the variety of names by which
commercial fasteners conform to the quality level
they are known have made this glossary neces
generally recognized by manufacturers and users
Iry. The naming of these products should be as commercial quality
ased on the shape or features of the products
Unfortunately, the names have sometimes been
taken from the names of the machines, appli
2.1.3 Compression Fastener, A compression
ances, material or application on which they are
fastener is a fastener the primary function of
used. and sometimes from the size of the fas
which is to resist forces which tend to compress it
tener. Thus a clear concept of the product for
which a particular name stands requires specific
information with regard to the distinguishing fea. 2. 1.4 Endurance Limit. The endurance limit is
tures of the product, its usual applications, and
considered to be the maximum stress that a fas
other characteristics which differentiate similar
tener can withstand wit