关键词: 碳纤维增强复合材料, 水导激光加工, 沟槽截面形貌, 热影响区

Abstract: The purpose of this paper was to investigate the influences of key processing parameters of water jet guided laser processing on the groovess cross-sectional morphology and heat affected zones of CFRPs. Therefore, based on the water jet guided laser processing equipment, a single factor experiment was designed to explore the effects of multiple key processing parameters, including laser power, water jet pressure, feed speed and laser repetition frequency. On this grooving experiment, the morphology of the groove sections and the formation mechanism of the heat affected zones were also analyzed. The following experimental results show that: the laser power has the greatest influences on the groove ablation depths and heat affected zones; the water jet pressure has the greatest influences on the groove ablation width; feed speed and laser repetition frequency has little effects on the groove ablation depth and ablation width, but has great effects on the heat affected zones. In addition, it is found that the removal area of groove cross sections displays V shape, and the heat affected zones are in the shape of sawtooth. A better groove section morphology is obtained by single factor analysis, the ablation depth and ablation width are as 772.8 μm and 894.7 μm, respectively. The heat affected zones of the carbon fiber layers is as 326.5 μm for the direction of 90° and 102.4 μm for the direction of 0°.

Key words: carbon fiber reinforced plastic(CFRP), water jet guided laser processing, groove section morphology, heat affected zone