TY - GEN
T1 - Sensitivity of PBX 9501 and PBX 9502 to Milling Operations
AU - Williams, Joshua
AU - Weeks, Ethan
AU - Clark, Raimi
AU - Watkins, Scott
AU - Dickens, James
AU - Mankowski, John
AU - Brinkman, Jacob
AU - Neuber, Andreas
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - Explosive driven pulsed power performance benefits from modern polymer-bonded explosives. In practical application, high precision in the dimensional shape is required, and high machining speeds are desired. The limits of machining speed, driven mainly by the thermal response of the energetic material, are investigated. Specifically, the thermal response of PBX 9501 (95% HMX, 2.5% Estane, 2.5% BDNPA/BDNPF by weight) and PBX 9502 (95% TATB, 5% Kel F-800 by weight) under conventional milling methods is examined. The presented work focuses on face milling performed with dry machining on a CNC, remote-controlled milling machine. The primary parameters of interest are the spindle speed, feed rate, step size, and depth of cut, with additional consideration given to endmill diameter, milling technique, and the number of flutes. The temperature of the system is monitored via high-speed IR videography and near the cutting interface with a K-type thermocouple inserted into the endmill's through-coolant hole. Operational forces and torques are recorded by a 6-axis force sensor mounted beneath the HE samples.An empirical relationship between temperature and the milling parameters is presented. Overall, milling regimes exist outside of DOE-STD-1212-2019 for which milling temperatures remain well below the HE critical temperatures.
AB - Explosive driven pulsed power performance benefits from modern polymer-bonded explosives. In practical application, high precision in the dimensional shape is required, and high machining speeds are desired. The limits of machining speed, driven mainly by the thermal response of the energetic material, are investigated. Specifically, the thermal response of PBX 9501 (95% HMX, 2.5% Estane, 2.5% BDNPA/BDNPF by weight) and PBX 9502 (95% TATB, 5% Kel F-800 by weight) under conventional milling methods is examined. The presented work focuses on face milling performed with dry machining on a CNC, remote-controlled milling machine. The primary parameters of interest are the spindle speed, feed rate, step size, and depth of cut, with additional consideration given to endmill diameter, milling technique, and the number of flutes. The temperature of the system is monitored via high-speed IR videography and near the cutting interface with a K-type thermocouple inserted into the endmill's through-coolant hole. Operational forces and torques are recorded by a 6-axis force sensor mounted beneath the HE samples.An empirical relationship between temperature and the milling parameters is presented. Overall, milling regimes exist outside of DOE-STD-1212-2019 for which milling temperatures remain well below the HE critical temperatures.
KW - HE
KW - PBX 9501
KW - PBX 9502
KW - machining limits
KW - milling
UR - http://www.scopus.com/inward/record.url?scp=85127273584&partnerID=8YFLogxK
U2 - 10.1109/PPC40517.2021.9733143
DO - 10.1109/PPC40517.2021.9733143
M3 - Conference contribution
AN - SCOPUS:85127273584
T3 - IEEE International Pulsed Power Conference
BT - 2021 IEEE Pulsed Power Conference, PPC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE Pulsed Power Conference, PPC 2021
Y2 - 12 December 2021 through 16 December 2021
ER -