Investigation on the effect of a pre-center drill hole and tool material on thrust force, surface roughness, and cylindricity in the drilling of Al7075

Amir Hossein Ghasemi, Amir Mahyar Khorasani* (Corresponding Author), Ian Gibson

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    12 Citations (Scopus)
    234 Downloads (Pure)

    Abstract

    Drilling is one of the most useful metal cutting processes and is used in various applications, such as aerospace, electronics, and automotive. In traditional drilling methods, the thrust force, torque, tolerance, and tribology (surface roughness) are related to the cutting condition and tool geometry. In this paper, the effects of a pre-center drill hole, tool material, and drilling strategy (including continuous and non-continuous feed) on thrust force, surface roughness, and dimensional accuracy (cylindricity) have been investigated. The results show that using pre-center drill holes leads to a reduction of the engagement force and an improvement in the surface quality and cylindricity. Non-continuous drilling reduces the average thrust force and cylindricity value, and High Speed Steels HSS-Mo (high steel speed + 5-8% Mo) reduces the maximum quantity of cutting forces. Moreover, cylindricity is directly related to cutting temperature and is improved by using a non-continuous drilling strategy.

    Original languageEnglish
    Article number140
    JournalMaterials
    Volume11
    Issue number1
    DOIs
    Publication statusPublished - 16 Jan 2018

    Keywords

    • Drilling
    • Pre-center drill hole
    • Surface roughness
    • Thrust force

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