TY - GEN
T1 - Effect of Thermosyphon Limits on Design of A Taper Thermosyphon Drill for Dry Drilling Operation
AU - Ncaba, Nkosana Ignetious
AU - Emmanuel Wiykiynyuy, Nyuytifo
AU - Jen, Tien Chien
AU - Ukoba, Kingsley
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/1
Y1 - 2020/1
N2 - This paper focused on the effect of thermosyphon limits on the design of a taper thermosyphon drill for dry drilling operation. Although, other methods such as minimum quantity lubrication have been sought but the harmful effects of metal working fluids persist. This study however focuses on the design, fabrication and testing of a thermosyphon drill for eliminating the use of metal working fluids in drilling operations. The methodology included the design of a taper thermosyphon drill, analysis of the thermosyphon drill, manufacturing and testing of the thermosyphon drill. A virtual design and stress analysis of the reversed tapered thermosyphon was done using SolidWorks software. A high speed steel drill bit was manufactured to suit the design requirements of the thermosyphon. The thermosiphon was then fabricated within the machine shop floor using Electric Discharge Machining through method of spark erosion. A reverse tapered thermosyphon was designed to improve the optimal performance of the drill. The reversed tapered thermosyphon specification includes a 20 mm diameter drill, a length of 140 mm and web thickness 7mm, with a taper thermosyphon of 6.48 mm large diameter and 2.5 mm small diameter on a length of 114 mm. The optimal position stress analysis shows that the tapered thermosyphon drill experienced a Von Mises Stress of 38.4 MPa for the cutting distance from the drill tip and 372°C for the optimal temperature. The optimal position stress analysis also showed a Von Mises Stress of 17 MPa for the largest taper diameter and 433°C for the optimal temperature. The thermosyphon drill bit was manufactured and tested against the dry drill and metal working fluid drill bit. The results displayed a reduction in drill bit peak temperatures on the drill bit tip of about 40% for the dry drilling and thermosiphon drilling processes.
AB - This paper focused on the effect of thermosyphon limits on the design of a taper thermosyphon drill for dry drilling operation. Although, other methods such as minimum quantity lubrication have been sought but the harmful effects of metal working fluids persist. This study however focuses on the design, fabrication and testing of a thermosyphon drill for eliminating the use of metal working fluids in drilling operations. The methodology included the design of a taper thermosyphon drill, analysis of the thermosyphon drill, manufacturing and testing of the thermosyphon drill. A virtual design and stress analysis of the reversed tapered thermosyphon was done using SolidWorks software. A high speed steel drill bit was manufactured to suit the design requirements of the thermosyphon. The thermosiphon was then fabricated within the machine shop floor using Electric Discharge Machining through method of spark erosion. A reverse tapered thermosyphon was designed to improve the optimal performance of the drill. The reversed tapered thermosyphon specification includes a 20 mm diameter drill, a length of 140 mm and web thickness 7mm, with a taper thermosyphon of 6.48 mm large diameter and 2.5 mm small diameter on a length of 114 mm. The optimal position stress analysis shows that the tapered thermosyphon drill experienced a Von Mises Stress of 38.4 MPa for the cutting distance from the drill tip and 372°C for the optimal temperature. The optimal position stress analysis also showed a Von Mises Stress of 17 MPa for the largest taper diameter and 433°C for the optimal temperature. The thermosyphon drill bit was manufactured and tested against the dry drill and metal working fluid drill bit. The results displayed a reduction in drill bit peak temperatures on the drill bit tip of about 40% for the dry drilling and thermosiphon drilling processes.
KW - component
KW - Dry Drilling
KW - Heat Pipe
KW - Metal Working Fluids
KW - Thermosyphon
UR - http://www.scopus.com/inward/record.url?scp=85083239325&partnerID=8YFLogxK
U2 - 10.1109/ICMIMT49010.2020.9041213
DO - 10.1109/ICMIMT49010.2020.9041213
M3 - Conference contribution
AN - SCOPUS:85083239325
T3 - Proceedings of 2020 IEEE 11th International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2020
SP - 118
EP - 124
BT - Proceedings of 2020 IEEE 11th International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 11th IEEE International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2020
Y2 - 20 January 2020 through 22 January 2020
ER -