Thick metal cutting techniques
For HPR400XD and HPR800XD plasma cutting systems
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 125 mm to 160 mm (5" to 6.25") thick. The techniques detailed in this document were developed using 304L stainless steel.
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 100 mm (4") stainless steel and 75 mm (3") aluminum. This document is broken into four sections:
- Thick metal cutting techniques 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 overs 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 160 mm (6.25") thick.
- Stationary piercing (up to 3-inch stainless steel and aluminum) describes the timing and sequence to be followed to perform stationary piercing on 75 mm (3") stainless steel and aluminum.
- Moving pierce technique (up to 4-inch stainless steel) 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 100 mm (4") and for the HPR400XD to 75 mm (4").