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Machined Graphite Terms
–
The most advanced type of EDM graphite. Angrostofine is used when fine
detail and a smooth finish is required.
– An uncut block of graphite
produced by the manufacturer that ranges from two to seven square inches.
A billet is commonly used for longer projects.
– The exit end
of a through-hole cavity which occurs at the moment of completion.
– An abundant element
of natural occurrence, often used instead of the word graphite. Graphite
is a type of the element carbon.
– A processed form of coal.
Processed coke burns more steadily and is stronger than metallurgical
coke.
– Two or more materials
combined. An example is copper graphite, which is a metallic/carbon composite.
– Electrical Discharge Machining;
a process in which metal is removed through burning or erosion instead
of through cutting.
– A tool used in EDM
which mirrors the desired shape. The electrode must be made out of materials
that can carry an electric current.
– The carbonaceous particles
in manufactured graphite comprising the base aggregate in an unbaked green-mix
formula.
– Thin fin or web of metal
extending beyond the confines of the casting, usually along the joint
line as a result of poor contact between cope and drag molds.
– Referring to a region
in a carbon or graphite body that is identifiable as being derived from
a particle of filler.
– Curved gate in the
shape of a horn arranged to allow entry of molten metal at the bottom
of the casting cavity.
– Having uniform properties
in all directions. The measured properties of an isotropic material are
independent of the axis of testing.
– To shape, cut or
finish a product by the use of a machine.
– A material
with a particle size of five microns or less.
– Changes one form
of energy into another; in EDM it is used to change electromagnetic force
into mechanical force for the machining of graphite. Although there is
sound produced when machining graphite, it is too high pitched for most
human hearing.
– Die used for shearing
or trimming a workpiece.
– Material that is
being machined. The material will continue to be operated on until it
is a replica of the original.
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