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Process in laser drilling of deep microholes without taper on metal materials

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Abstract

Deep microhole machining is currently a prominent research area within the aerospace field, encompassing blade film cooling and fuel injection control technologies. However, taper defects in metal materials may lead to performance degradation or even structural damage over a component’s lifetime. Trepanning and helical drilling, facilitated by ultrashort pulse lasers, have proven more suitable for achieving high-precision, deep holes in metal materials. Nonetheless, excessive repetition rates can also result in severe thermal damage. Various methods are commonly employed for controlling taper, including parameter optimization, assistance, and secondary modification. Tilted laser beam drilling is widely utilized and has been integrated into relevant machining systems for commercial applications. Typical deep microholes include film cooling holes and injection microholes. Laser drilling is a potential machining method for new materials in the aerospace field. Although laser drilling processing has been studied, numerous related scientific challenges and technical difficulties must be addressed before practical implementation.

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Authors and Affiliations

  1. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, 710054, China

    RunZe Fan, XueSong Mei & JianLei Cui

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  1. RunZe Fan
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  2. XueSong Mei
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  3. JianLei Cui
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Correspondence to JianLei Cui.

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This work was supported by the Science Center for Gas Turbine Project (Grant No. P2022-A-IV-002-003), the National Natural Science Foundation of China (Grant No. 52022078), Shaanxi Provincial Key Research and Development Program (Grant No. 2021ZDLGY10-02), and the fund of the State Key Laboratory of Solidification Processing in NPU (Grant No. SKLSP202203).

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Fan, R., Mei, X. & Cui, J. Process in laser drilling of deep microholes without taper on metal materials. Sci. China Technol. Sci. 67, 37–59 (2024). https://doi.org/10.1007/s11431-023-2557-x

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