TY - GEN
T1 - Semiconductor aspects of the oxyfuel cutting torch preheat flame
T2 - ASME 2020 15th International Manufacturing Science and Engineering Conference, MSEC 2020
AU - Martin, Christopher R.
AU - Pond, Teresa
AU - Tomas, Jacob
AU - Schmit, Jenna
AU - Miguel, Erikson
AU - Untaroiu, Alex
AU - Xu, Kemu
N1 - Publisher Copyright:
Copyright © 2020 ASME.
PY - 2020
Y1 - 2020
N2 - This two-part paper presents precise measurements of the ion currents passing between the torch and work piece of the preheat flame of an oxyfuel cutting torch as a means for replacing contemporary sensing suites. Part I shows that the current-voltage characteristic of the flame exhibits sharp discontinuities common to semi-conductors that we study in various configurations including preheat, pierce, cut, and loss-of-cut. Standoff measurements are made by applying a sinusoidal current signal between the torch and work piece while the resulting voltage amplitude is an indication of flame resistance. Uncertainties are estimated to range from 0.5mm to 1mm (.02in to .04in). Signals for ready-to-pierce and precursors for loss-of-cut are also produced due to the generation of secondary ions from chemical activity at the work piece.
AB - This two-part paper presents precise measurements of the ion currents passing between the torch and work piece of the preheat flame of an oxyfuel cutting torch as a means for replacing contemporary sensing suites. Part I shows that the current-voltage characteristic of the flame exhibits sharp discontinuities common to semi-conductors that we study in various configurations including preheat, pierce, cut, and loss-of-cut. Standoff measurements are made by applying a sinusoidal current signal between the torch and work piece while the resulting voltage amplitude is an indication of flame resistance. Uncertainties are estimated to range from 0.5mm to 1mm (.02in to .04in). Signals for ready-to-pierce and precursors for loss-of-cut are also produced due to the generation of secondary ions from chemical activity at the work piece.
UR - http://www.scopus.com/inward/record.url?scp=85100913264&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85100913264&partnerID=8YFLogxK
U2 - 10.1115/MSEC2020-8258
DO - 10.1115/MSEC2020-8258
M3 - Conference contribution
AN - SCOPUS:85100913264
T3 - ASME 2020 15th International Manufacturing Science and Engineering Conference, MSEC 2020
BT - Additive Manufacturing; Advanced Materials Manufacturing; Biomanufacturing; Life Cycle Engineering; Manufacturing Equipment and Automation
PB - American Society of Mechanical Engineers
Y2 - 3 September 2020
ER -