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كتاب Machine Elements in Mechanical Design
The objective of this book is to provide the concepts, procedures, data, and decision analy-
sis techniques necessary to design machine elements commonly found in mechanical de-
vices and systems.
Students completing a course of study using this book should be able to
execute original designs for machine elements and integrate the elements into a system
composed of several elements.This process requires a consideration of the performance requirements of an individ-
ual element and ofthe interfaces between elements as they work together to form a system.For example, a gear must be designed to transmit power at a given speed.
The design mustspecify the number of teeth, pitch, tooth form, face width, pitch diameter, material, and
method of heat treatment.
But the gear design also affects, and is affected by, the mating gear,
the shaft carrying the gear, and the environment in which it is to operate.
Furthermore, the shaft must be supported by bearings, which must be contained in a housing.
Thus, the designer should keep the complete system in mind while designing each individual ele-
ment. This book will help the student approach design problems in this way.This text is designed for those interested in practical mechanical design.
The emphasis is on the use of readily available materials and processes and appropriate design ap-
proaches to achieve a safe, efficient design.
It is assumed that the person using the book will
be the designer, that is, the person responsible for determining the configuration of a ma-
chine or a part of a machine. Where practical, all design equations, data, and proceduresneeded to make design decisions are specified.It is expected that students using this book will have a good background in statics,
strength of materials, college algebra, and trigonometry. Helpful, but not required, would
be knowledge of kinematics, industrial mechanisms, dynamics, materials, and manufactur-
Among the important features of this book are the following :
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