this is the full answer of "m1" question
here u r..
What is the importance of working to recognized
standards when producing engineering drawing?
It is always better to
make the drawings as per some recognised standard. The engineering drawings
normally use letters, symbols and short forms to make the drawing more
readable. To avoid any confusions to an external party (a component supplier
company - it could be even from another country, or even the customer)
regarding the meaning of these symbols, notations short forms etc. Also, making
a standardised format for drawings make it easy for anyone to understand the
drawing. They can easily understand where to look for the Title block, Notes
general tolerances etc…
A graphical language used
by engineers and other technical personnel associated with the engineering
profession. The purpose of engineering drawing is to convey graphically the
ideas and information necessary for the construction or analysis of machines,
structures, or systems.
The basis for much
engineering drawing is representation (projection). Objects are depicted by
front, top, side, auxiliary, or views, or combinations of these. The complexity
of an object determines the number of views shown. At times, pictorial views
often include such features as various types of lines, dimensions, lettered
notes, sectional views, and symbols. They may be in the form of carefully
planned and checked mechanical drawings, or they may be sketches. Usually a
sketch precedes the mechanical drawing.
Many objects have
complicated interior details which cannot be clearly shown by means of front,
top, side, or pictorial views. Section views enable the engineer or detailer to
show the interior detail in such cases. Features of section drawings are
cutting-plane symbols, which show where imaginary cutting planes are passed to
produce the sections, and section-lining (sometimes called cross-hatching),
which appears in the section view on all portions that have been in contact
with the cutting plane.
In addition to describing
the shape of objects, many drawings must show dimensions, so that workers can
build the structure or fabricate parts that will fit together. This is
accomplished by placing the required values (measurements) along dimension
lines (usually outside the outlines of the object) and by giving additional
information in the form of notes which are referenced to the parts in question
by angled lines called leaders.
Layout drawings of
different types are used in different manufacturing fields for various purposes.
One is the plant layout drawing, in which the outline of the building, work
areas, aisles, and individual items of equipment are all drawn to scale.
Another type of layout, or preliminary assembly, drawing is the design layout,
which establishes the position and clearance of parts of an assembly.
A set of working drawings
usually includes detail drawings of all parts and an assembly drawing of the
complete unit. Assembly drawings vary somewhat in character according to their
use, as design assemblies or layouts; working drawing assemblies; general
assemblies; installation assemblies; and check assemblies.
Schematic or diagrammatic
drawings make use of standard symbols which indicate the direction of flow. In
piping and electrical diagrams, symbols are used. The fixtures or components
are not labeled in most schematics because the readers usually know what the
include design and working drawings for structures such as building, bridges,
dams, tanks, and highways. Such drawings form the basis of legal contracts.
Structural drawings the same principles as do other engineering drawings, but
use terminology and dimensioning techiques different from thoses shown in
it is too long i know
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