Two-dimensional Ultrasound-assisted Belt Grinding Method Based on Phase Regulation and its Effect on the Surface Integrity of GH4169
Nickel-based superalloys are prone to surface damage during machining,and its service performance has strong correlation with surface texture and defects.Meanwhile,complex load puts forward isotropic processing requirements.Combining flexible and low damage of belt grinding and texture optimization of ultrasonic-assisted machining,two-dimensional ultrasonic-assisted belt grinding method is proposed.The abrasive trajectory under different parameters is analyzed,and the influence of ultrasonic direction,amplitude and phase on material removal is analyzed based on single-particle scratch test.The influence of process parameters on surface integrity and uniformity of GH4169 is also revealed.Results show that two-dimensional ultrasonic-assisted belt grinding has texture optimization effect,and can obtain uniform plastic deformation layer.Reticulum-like texture can be prepared and the anisotropy of surface integrity can be suppressed.Phase difference of 90° improves surface integrity and consistency.Large amplitude can increase residual compressive stress and reduce surface roughness.Low feed speed result in small roughness and large residual compressive stress.
ultrasonic assisted grindingplanar two-dimensional ultrasonic vibrationabrasive belt grindingsurface integrityanisotropyGH4169
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