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

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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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Funding

This work was financially supported by the National Natural Science Foundation of China (No. 51575049) and Hebei Education Department (No. QN2016162). Without their support, this work would not have been possible.

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Authors and Affiliations

  1. College of Mechanical Engineering, North China University of Science and Technology, Tangshan, 063210, People’s Republic of China

    Haoqiang Zhang, Song Zhao, Lina Wang, Chao Li & Suoxia Hou

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  1. Haoqiang Zhang
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  2. Song Zhao
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  3. Lina Wang
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  4. Chao Li
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  5. Suoxia Hou
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Correspondence to Suoxia Hou.

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Zhang, H., Zhao, S., Wang, L. et al. Micro-drilling of AISI 1045 steel using a centering micro-drill. Int J Adv Manuf Technol 103, 4189–4203 (2019). https://doi.org/10.1007/s00170-019-03758-3

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  • DOI: https://doi.org/10.1007/s00170-019-03758-3

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