Experiment on grinding performance of high-density aramid honeycombs

High-density aramid paper honeycomb consists of high toughness aramid fibers and a high-content of brittle resin, and it is commonly used in the aerospace industry as weight-reducing composite material. High-density honeycomb is difficult to process after molding. In order to meet the processing requirements of material after forming, according to the composition and structural characteristics of the material, we carried out grinding process experiments on high density honeycombs with diamond grinding wheels, and summarized that there are three typical processing features of high density honeycombs after the grinding process, namely the double-layer honeycomb paper widening topography, the unseparated chip topography and the fiber pull-out morphology. The influences of grinding speed, feed speed and cutting depth on surface morphology were studied by single factor test method. The results show that different process parameters have different effects on the morphology of high density honeycomb. When the grinding speed is increased from 5.2 m/s to 20.9 m/s, the three characteristic morphologies are improved. When the feed speed is increased from 50 mm/min to 350 mm/min, the number of fibers pull-out increase, and when the cutting depth is increased from 0.1 mm to 0.9 mm, the width of the unseparated chips become large.