Cut Quality - ESAB Cutmaster 40 Manual De Instrucciones

4.04 Cut Quality

NOTE!
Cut quality depends heavily on
setup and parameters such as torch
standoff, alignment with the work-
piece, cutting speed, gas pressures,
and operator ability. Refer to appen-
dix pages for additional information
as related to the power supply.
Cut quality requirements differ depending on ap-
plication. For instance, nitride build-up and bevel
angle may be major factors when the surface will be
welded after cutting. Dross-free cutting is important
when finish cut quality is desired to avoid a second-
ary cleaning operation. The following cut quality
characteristics are illustrated in the following figure:
Kerf Width
Top
Spatter
Dross
Build-Up
Cut Quality Characteristics
Cut Surface
The desired or specified condition (smooth or
rough) of the face of the cut.
Nitride Build - Up
Nitride deposits can be left on the surface of the
cut when nitrogen is present in the plasma gas
stream. These buildups may create difficulties
if the material is to be welded after the cutting
process.
Bevel Angle
The angle between the surface of the cut edge
and a plane perpendicular to the surface of the
plate. A perfectly perpendicular cut would result
in a 0° bevel angle.
300X5394
Cut Surface
Bevel Angle
Top Edge
Rounding
Cut Surface
A-00007
Drag Lines
4-7
ESAB CUTMASTER 40
Top - Edge Rounding
Rounding on the top edge of a cut due to wear-
ing from the initial contact of the plasma arc on
the workpiece.
Bottom Dross Buildup
Molten material which is not blown out of the cut
area and resolidifies on the plate. Excessive
dross may require secondary cleanup opera-
tions after cutting.
Kerf Width
The width of the cut (or the width of material
removed during the cut).
Top Spatter (Dross)
Top spatter or dross on the top of the cut caused
by slow travel speed, excess cutting height, or
cutting tip whose orifice has become elongated.
OPERATION