电镀金刚石刀具钻削碳纤维复合材料磨粒磨损特征研究

采用电镀金刚石钻磨组合刀具钻削碳纤维复合材料能够有效地减小或消除毛刺和分层等加工缺陷，刀具的使用寿命主要取决于电镀金刚石磨粒的使用寿命．为此，对研制的刀具表面电镀金刚石磨粒的加工磨损形态进行了系统的统计观测．研究结果表明：采用电镀金刚石钻磨组合刀具钻削T300碳纤维复合材料过程中，电镀层的金刚石磨粒具有独特的初期不稳定磨损、混合磨损和正常磨损3个阶段，其磨损形态与钻削产生的轴向力具有显著的线性关系．随着钻孔数目的增加，钻磨孔的轴向力逐渐增大，但是加工出的孔径在刀具经过初期磨损后仍然能够较长时间地稳定在0．024mm误差范围内．

Research on abrasive wear characteristics of electroplated diamond tool during drilling carbon fiber reinforced plastics

During the process of drilling carbon fiber reinforced plastics (CFRP), it tends to effectively reduce or eliminate manufacturing deficiency, such as burr and delamination using electroplated diamond step-core drill whose service life mainly depends on the service life of electroplated diamond abrasive. Therefore, systematic statistical observation was carried out on the abrasive wear patterns of electroplated diamond. Investigations show that using the electroplated diamond step-core drill, three unique stages of diamond abrasive wear can be observed during the process of drilling T300 CFRP, which involves initial instable wear stage, mixed-wear stage and normal wear stage. The wear patterns of diamond abrasive and drilling thrust force have a significant linear relationship. With the growing of hole numbers, the thrust force gradually increases, but diameter tolerances of the holes are still stabilized in a range of 0.024 mm after the initial instable wear stage.