研究目的
Study of cutting forces during laser assisted machining of Inconel 718 superalloy using finite element (FE) approach.
研究成果
The developed finite element model for laser assisted machining of Inconel 718 was validated through experimentation, showing good correlation between experimental and simulated values with a coefficient of determination of 0.83. The model can be utilized for parametric study and optimization.
研究不足
The deviation between experimental and simulated cutting force values was less than 15% in most cases, but higher deviations were observed in some cases, possibly due to the use of the same friction coefficient for all simulations.
1：Experimental Design and Method Selection:
An iterative procedure was adopted to determine the coefficient of friction at tool chip interface. Arbitrary Lagrangian Eulerian (ALE) formulation was included to simulate the chip formation process. Johnson-cook material model for flow stress behaviour of workpiece material was incorporated during simulation.
2：Sample Selection and Data Sources:
Inconel 718 superalloy was used as the workpiece material.
3：List of Experimental Equipment and Materials:
Nd:YAG solid state continuous wave laser (Make: JK laser?, UK) with a maximum power of 2 kW and wavelength of
4：06 μm was used as a source for preheating the workpiece during experiments. Kistler dynamometer (9257B) was used to measure the cutting forces. Experimental Procedures and Operational Workflow:
Laser assisted machining experiments were done under orthogonal cutting condition according to Taguchi’s design of experiments.
5：Data Analysis Methods:
The cutting force results obtained through experimentation and simulation were compared.
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