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Laser-assisted machining experiments consist of three parts: set-up, "run", and analysis. The set-up involves mounting the workpiece and targeting the pyrometer (surface temperature measurement) and laser and setting the operating conditions. The "run" is the actual laser-assisted machining operation, during which we can measure the:
After the "run", force and temperature measurements are analyzed and possibly compared with numerical predictions. The effect of the machining operation on the tool and workpiece is also studied. This post-process analysis includes measurement of tool wear and the workpiece surface roughness. The chips and machined surface are examined under the scanning electron microscope (SEM) to characterize the material removal mechanism and search for surface cracks. Some workpieces are sliced perpendicular to the long axis and the cut surfaces polished. These are then examined under the SEM for signs of sub-surface cracks caused by LAM. X-ray diffraction is also used to study residual stresses and phase changes on the machined surface.
- three components of the cutting force (main, thrust and feed),
- laser power, and
- workpiece surface temperature at one location.
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