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Femtosecond laser helical drilling of nickel-base single-crystal super-alloy: Effect of machining parameters on geometrical characteristics of micro-holes.
- Source :
-
Advances in Production Engineering & Management . Dec2019, Vol. 14 Issue 4, p407-420. 14p. - Publication Year :
- 2019
-
Abstract
- Laser micro-hole processing has been widely used in industry. Many laser processing parameters can affect the processing results. The relationship between the geometrical shapes of micro-holes and the laser processing parameters has not been determined accurately. In this paper, experiments on the femtosecond laser drilling of the nickel-base single-crystal super-alloy (DD6) materials were conducted to determine the relationship between the parameters, such as the laser single-pulse energy, rotation rate, and downward focus rate, and the geometrical characteristics of the micro-holes, such as the diameter, and roundness. A group of orthogonal experiments were conducted to determine the effects of the comprehensive influencing factors on the geometrical characteristics of the micro-holes. After the experiments were conducted and analysed, the experimental results were modelled by a backpropagation neural network, and the mapping relationship between the laser parameters and the geometrical morphologies of the micro-holes was constructed. The model established by the backpropagation neural network could obtain accurate prediction results, and the predictions of the diameters of the micro-holes were better than those of the roundness. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LASER drilling
*FEMTOSECOND lasers
*ARTIFICIAL neural networks
Subjects
Details
- Language :
- English
- ISSN :
- 18546250
- Volume :
- 14
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Advances in Production Engineering & Management
- Publication Type :
- Academic Journal
- Accession number :
- 140997678
- Full Text :
- https://doi.org/10.14743/apem2019.4.337