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Glossary of laser cutting terms - T
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Taper
Taper is the difference between the top profile of the laser
cut verses the bottom profile of the laser cut. Typically,
the laser cut width is narrower at the bottom than at the
top.
TEA Laser
An acronym for transversely excited atmospheric laser. This
CO2 gas laser uses a transverse flow of gas and operates at
higher pressures than other gas lasers, generally near atmospheric
pressure. The result is a higher energy beam.
TEM
TEM is an abbreviation for Transverse ElectroMagnetic modes.
This term is used to designate the cross-sectional shape of
the beam.
Thermal Conductivity
A measure of a materials ability to move heat from one place
to another. During laser cutting, the cut
zone should be heated without wasting energy heating up
surrounding workpiece material. Materials with high thermal
conductivity, such as copper and aluminum, cutting is slowed
down as heat escapes from the cut
zone.
Thermoplastics
Polymers that can be repeatedly melted down and cast into
new shapes. Thermoplastics include polypropylene, polystyrene,
polyethylene, polyamide (nylon) and others.
Thermosets
Materials that cannot be remelted once they have been made
into their initial shape. Epoxies, phenolic resins, and most
natural rubber products are included in this category.
Titanium Alloys
Alloys of titanium that are tough, strong, light and corrosion
resistant. Titanium reacts energetically with oxygen which
results in poor edge quality, widespread burning, and hard
and brittle cut edges. For this reason chemically inert gases
such as argon or helium are recommended for use in cutting
titanium.
Traverse
A traverse is normal machine movement without laser cutting.
For example, a laser is traversing when moving the cutting
head into position to cut.
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