TY - GEN
T1 - Thermal performance of heat pipe drill
T2 - 2005 ASME Summer Heat Transfer Conference, HT 2005
AU - Jen, Tien Chien
AU - Liao, Quan
AU - Chen, Qinghua
AU - Li, Longjian
AU - Cui, Wenzhi
PY - 2005
Y1 - 2005
N2 - It is well known that drilling is one of the most difficult metalwork cutting operations, not only from the viewpoint of manufacturing process, but also from the thermal management point of view of the drill. For the drilling process, due to its long time continuous metal-to-metal friction between drill tip edge and work piece, a significant amount of heat is generated on the interface, which is in a confined space compared to other machining processes, such as cutting or milling. This makes it very difficult to keep the temperature of drill tip under a certain but acceptable range since the coolant is unable to penetrate deep enough into the hole. Also, based on the environmental considerations and the cost reduction requirement, the conventional flooding coolant method become highly inefficient and expensive due to high maintenance costs. A new approach, dry drilling method (i.e., no coolant is employed during the drilling process) is investigated in this study. In dry drilling, we used heat pipe technology to accomplish the goal of efficient heat removal from the drill tip. It is heat pipe's unique and excellent advantages such as, high reliability, supreme equivalent thermal conductivity, flexible adaptability and so forth, that make it possible for dry drilling by combining the drill and heat pipe. From the numerical simulation viewpoint of heat pipe drill, how to correctly model the heat pipe in the drill is one of the crucial tasks because it will directly influence the accuracy of the simulation results. So far, there are few different kinds of simulation models for heat pipe drill and each of them works well in some kinds of special situations. The present paper studied and compared these different simulation models of heat pipe and then proposed a general, simple but robust and more accurate approach to simulate the heat transfer process in the heat pipe drill. Furthermore, this kind of the heat pipe model can be used in many other heat pipe applications.
AB - It is well known that drilling is one of the most difficult metalwork cutting operations, not only from the viewpoint of manufacturing process, but also from the thermal management point of view of the drill. For the drilling process, due to its long time continuous metal-to-metal friction between drill tip edge and work piece, a significant amount of heat is generated on the interface, which is in a confined space compared to other machining processes, such as cutting or milling. This makes it very difficult to keep the temperature of drill tip under a certain but acceptable range since the coolant is unable to penetrate deep enough into the hole. Also, based on the environmental considerations and the cost reduction requirement, the conventional flooding coolant method become highly inefficient and expensive due to high maintenance costs. A new approach, dry drilling method (i.e., no coolant is employed during the drilling process) is investigated in this study. In dry drilling, we used heat pipe technology to accomplish the goal of efficient heat removal from the drill tip. It is heat pipe's unique and excellent advantages such as, high reliability, supreme equivalent thermal conductivity, flexible adaptability and so forth, that make it possible for dry drilling by combining the drill and heat pipe. From the numerical simulation viewpoint of heat pipe drill, how to correctly model the heat pipe in the drill is one of the crucial tasks because it will directly influence the accuracy of the simulation results. So far, there are few different kinds of simulation models for heat pipe drill and each of them works well in some kinds of special situations. The present paper studied and compared these different simulation models of heat pipe and then proposed a general, simple but robust and more accurate approach to simulate the heat transfer process in the heat pipe drill. Furthermore, this kind of the heat pipe model can be used in many other heat pipe applications.
KW - Heat pipe drill
KW - Heat transfer
KW - Simulation model
KW - Super-thermal conductor
KW - Thermal management
UR - http://www.scopus.com/inward/record.url?scp=29644437676&partnerID=8YFLogxK
U2 - 10.1115/HT2005-72425
DO - 10.1115/HT2005-72425
M3 - Conference contribution
AN - SCOPUS:29644437676
SN - 0791847314
SN - 9780791847312
T3 - Proceedings of the ASME Summer Heat Transfer Conference
SP - 355
EP - 360
BT - Proceedings of the ASME Summer Heat Transfer Conference, HT 2005
Y2 - 17 July 2005 through 22 July 2005
ER -