Enhanced Permeation Mechanism and Tribological Assessment of Ultrasonic Vibration Nanolubricants Grinding Cfrp

Abstract

CFRP precision grinding is a committed step for aeronautical industry. Ultrasonic empowered CNTs nanolubricants MQL grinding was developed to achieve high surface integrity. The influence of ultrasonic vibration on permeation mechanism and fluid dynamic pressure lubrication were elucidated. The mechanical behavior of droplets anisotropic spreading contact lines and capillary action were analyzed. The tribological assessment of CFRP grinding surface with different fiber orientation angles was explored. The results indicate contact angles in vertical grinding direction are higher than parallel direction. The application of 2D ultrasonic vibration reduced stable aspect ratio and accelerates spreading speed of droplets. Nanolubricants shown encouraging results with respect to friction coefficient, grinding force ratio, wear area and volume, which maximum reduction in friction coefficient is 34.87%.

Keywords: CFRP, Ultrasonic Vibration Grinding, Minimum quantity lubrication, Tribological characteristics