工程制图手册(英文版)

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This latest edition of A Manual of Engineering Drawing

has been revised to include changes resulting from the

introduction of BS 8888. British Standard 60 8 was

introduced in 1927 and acknowledged by Draughtsmen

as THE reference Standard for Engineering Drawing.

The British Standards Institution has constantly kept

this Standard under review and taken account of

technical developments and advances. Since 1927, major

revisions were introduced in 1943, 1953, 1964 and

1972 when the contents of BS 60 8 Engineering

Drawing Practice was divided into three separate

sections.

Part 1: General principles.

Part 2: Dimensioning and tolerancing of size.

Part 3: Geometrical tolerancing.

In 1985, the fifth revision was metricated.

During the period 1985–60 0 major discussions were

undertaken in co-operation with International Standards

Organizations.

The general trend in Engineering Design had been

that the designer who was responsible for the conception

and design of a particular product generally specified

other aspects of the manufacturing process.

Gradually however, developments from increased

computing power in all aspects of production have

resulted in progressive advances in manufacturing

techniques, metrology, and quality assurance. The

impact of these additional requirements on the Total

Design Cycle resulted in the withdrawal of BS 60 8 in

60 0. Its replacement BS 8888 is a far more

comprehensive Standard.

The full title of BS 8888 reflects this line of thought.

BS 8888. Technical product documentation (TPD).

Specification for defining, specifying and graphically

representing products.

It must be appreciated and emphasized that the

change from BS 60 8 to BS 8888 did not involve

abandoning the principles of Engineering Drawing in

BS 60 8. The new Standard gives the Designer a vastly

increased number of tools at his disposal.

It is important to stress that British and ISO drawing

standards are not produced for any particular draughting

method. No matter how a drawing is produced, either

on an inexpensive drawing board or the latest CAD

equipment, the drawing must conform to the same

standards and be incapable of misinterpretation.

The text which follows covers the basic aspects of

engineering drawing practice required by college and

university students, and also professional drawing office

personnel. Applications show how regularly used

standards should be applied and interpreted.

Geometrical constructions are a necessary part of

engineering design and analysis and examples of twoand three-dimensional geometry are provided. Practice

is invaluable, not only as a means of understanding

principles, but in developing the ability to visualize

shape and form in three dimensions with a high degree

of fluency. It is sometimes forgotten that not only does

a draughtsman produce original drawings but is also

required to read and absorb the content of drawings he

receives without ambiguity.

The section on engineering diagrams is included to

stimulate and broaden technological interest, further

study, and be of value to students engaged on project

work. Readers are invited to redraw a selection of the

examples given for experience, also to appreciate the

necessity for the insertion and meaning of every line.

Extra examples with solutions are available in

Engineering Drawing From First Principles using

AutoCAD, also published by Butterworth-Heinemann.

It is a pleasure to find an increasing number of

young ladies joining the staff in drawing offices where

they can make an effective and balanced contribution

to design decisions. Please accept our apologies for

continuing to use the term ‘draughtsmen’, which is

the generally understood collective noun for drawing

office personnel, but implies equality in status.

In conclusion, may we wish all readers every success

in their studies and careers. We hope they will obtain

much satisfaction from employment in the absorbing

activities related to creative design and considerable

pleasure from the construction and presentation of

accurately defined engineering drawings.

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