Abbreviations: Abbreviations are a
shortened word or phrase.
Accumulating
error:
An accumulating error is when tolerance errors of different features have been
added together. A tolerance error is the difference between the dimension on
the engineering drawing and the measurement of the manufactured component.
Add:
Combine two or more numbers together to make a total.
Addition:
Addition is a particular type of calculation in which two or more numbers are
added together to make a total.
Adjacent side:
This adjacent side in a right angled triangle is the side next to a given angle
which is not the hypotenuse.
Adjustment stroke control:
This describes the depth of the blade adjustment on a press brake. With some
press brakes the adjustment controls the bed which can lift up or down.
Air bending:
Air bending describes the three point contact between the blade and the vee
block in a press brake.
Aligned:
When dimension is recorded it can be written vertically so it can be read
from the right hand side or the bottom of the drawing. This is what is meant
by aligned.
Another way to record dimension is unidirectionally.
Allowance for green:
When using standard pyramid rolls, if the ends are not preset, the distance
from the centre of the bottom roll to the centre of the top roll will not be
curved - it will remain flat. Therefore this distance (A) has to be added to
the pre-determined mean circumference, to produce a properly formed cylinder.
The extra material (the flat part) is called 'green'.
Alloy:
An alloy is made up of two or more metals (sometimes a metal and a non metal).
An example is stainless steel which can be a combination of steel and chromium,
nickel, molybdenum, titanium, or niobium.
Amendments: Amendments are notes
about changes or alterations to an engineering drawing.
Angular: Angular describes something
which has angles in it.
Angular measurement: Angular measurement
is the relationship between two surfaces that are not parallel. Angular measurement
uses degrees as the standard of measure.
Apex: The apex is highest point of
a shape. It is usually the pointed end of an object, ie the tip.
Apex height: The apex height is the
distance from the pointed end of a cone to the centre of the horizontal base.
Apex point: The apex point is the
tip of any given conical shape.
Arc welding:
Arc welding is a welding process
in which a continuous and consumable wire electrode and
a shielding gas are
fed through a welding gun.
Area: In mathematics, an area is a
distinct part or section of a surface.
AS 1100 drawing equipment:
AS1100, drawing equipment is equipment that conforms to the Australian Standard.
AS
1100.101-1992: This Australian standard defines the general principles
for technical drawing and shows tables of symbols and abbreviations and their
meanings.
AS
1100.201-1992:
This Australian standard is for mechanical engineering drawing and includes
information for surface texture, welding, centre holes, pipelines,springs,
gears, splines, seals and knurling.
AS 1101 part 3:
Graphical Symbols for General Engineering - Part 3 - Symbols for Welding
AS/NZS
1100.501: 2002:
This Australian standard is for structural engineering drawing. It looks at general
applications like dimensioning, lines, symbols, abbreviations, structural elements,
scales, cross referencing and arrangement of elements as well as specific applications
for structural steel.
Assembly
drawing: Assembly drawings give us a big picture view of the completed
project. It shows how the components you may need to build fit together.
These drawings include information about overall dimensions and the general
arrangement of components. It is sometimes referred to as a general assembly
drawing.
Australian
Standards: The Australian Standards you will use for technical
drawing are:
Auxiliary view: A view projected
on a plane which is parallel to the surface of the principal view.