Thick metal cutting techniques
For HPR400XD™ and HPR800XD plasma cutting systems
White paper
Introduction
Using plasma to successfully cut thick metal requires more
skill and technique than using plasma on thinner metal. The
thick metal cutting techniques described in this document
may be needed from the beginning of the cut with an edge
start all the way to finishing the cut with a completely
severed part.
Note: Unless otherwise specified, for the purposes of this document,
thick metal consists of stainless steel and aluminum from 5 inches to
6.25 inches (125 mm to 160 mm) thick. The techniques detailed in this
document were developed using 304L stainless steel. Materials used for the
development of this white paper were based on U.S. customary units
(inches). Metric conversions are provided for reference.
This document describes thick metal cutting techniques
developed for the HPR800XD that can help manage the
large plasma lag angles associated with thick metal cutting.
It also describes the timing and sequencing needed to be
successful in piercing up to 4 inches (100 mm) stainless
steel and 3 inches (75 mm) aluminum. This document is
broken into four sections:
• Thick metal cutting techniques overview on page 2 is an
overview of different lag angle management techniques for
thick metal cutting that covers a plasma cut from the
beginning to completion.
• Dogleg lead-out details for thick stainless steel on page 4
covers the details of a special lead-out technique (known as
the dogleg or acute angle lead-out) that can allow you to
completely sever a stainless steel part up to 6.25 inches
(160 mm) thick.
• Stationary piercing (up to 3-inch stainless steel and
aluminum) on page 8 describes the timing and sequence to
be followed to perform stationary piercing on 3 inch
(75 mm) stainless steel and aluminum.
• Moving pierce technique (up to 4-inch stainless steel) on
page 10 describes a moving pierce technique for thick
stainless steel that can be used with both the HPR800XD
and the HPR400XD. This technique, combined with
PowerPierce
®
technology, extends the pierce capacity for
the HPR800XD to 4 inches (100 mm) and for the
HPR400XD to 3inches (75mm).
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