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The International Journal of Advanced Manufacturing Technology

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19-05-2019 | ORIGINAL ARTICLE

Micro-drilling of AISI 1045 steel using a centering micro-drill

Authors: Haoqiang Zhang, Song Zhao, Lina Wang, Chao Li, Suoxia Hou

Published in: The International Journal of Advanced Manufacturing Technology | Issue 9-12/2019

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Abstract

Micro-hole drilling is experiencing a very rapid growth in precision production industries. The micro-drills play a critical role in manufacturing industry. There are many factors which influence the micro-drill performance including the drill point geometry, the drill material, and the workpiece material, among which the most fundamental factor is the drill point geometry. In this paper, a new micro-drill point geometry, termed the centering micro-drill point, is developed. A mathematical model for this new micro-drill point has been established. Micro-drilling tests in AISI 1045 steel are performed with different cutting conditions. By contrasting centering micro-drill and planar drill point micro-drill, the cutting performance of the centering micro-drill has been investigated. The results showed that, when the cutting speed is 35 m/min and the feed rate is 44 mm/min, the thrust force of the centering micro-drill reduces by 21.7% than that of planar micro-drill and the drilling hole amounts increase by 13.5%. The roundness of the thirtieth hole drilled by centering micro-drill is 1.02, and it is 1.08 by planar micro-drill; the centering micro-drill has better position accuracy than planar micro-drill, and further gets good size and shape accuracy.

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Title: Micro-drilling of AISI 1045 steel using a centering micro-drill
Authors: Haoqiang Zhang
Song Zhao
Lina Wang
Chao Li
Suoxia Hou
Publication date: 19-05-2019
Publisher: Springer London
Published in: The International Journal of Advanced Manufacturing Technology / Issue 9-12/2019
Print ISSN: 0268-3768
Electronic ISSN: 1433-3015
DOI: https://doi.org/10.1007/s00170-019-03758-3

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