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三种钻头钻削CFRP轴向力的时变曲线及预测
邱新义1, 李鹏南1, 陈安华2, 牛秋林1, 黄文亮1
1.湖南科技大学机电工程学院, 湘潭 411201;2.湖南科技大学机械设备健康维护省重点实验室, 湘潭 411201
摘要:
采用二刃、三刃双锋角钻头和圆弧形钻头钻削CFRP单向板,研究钻削过程中轴向力时变曲线的特征,并探索用预测轴向力时变曲线上的关键拐点的方法来构建预测轴向力时变曲线模型。结果表明:三刃双锋角钻头的轴向力时变曲线最为稳定,钻削过程最为稳定;轴向力最大的是三刃双锋角钻头,其次是圆弧形钻头,最小的是二刃双锋角钻头,说明二刃双锋角钻头适合钻削CFRP;用预测轴向力时变曲线上的关键拐点的方法构建的轴向力时变曲线可以很好地预测双锋角钻头轴向力时变曲线。
关键词:  CFRP  轴向力  双锋角钻头  圆弧形钻头
DOI:10.12044/j.issn.1007-2330.2018.06.012
分类号:TB33
基金项目:国家自然科学基金(No.51775184,No.51275168,No.51605161);湖南省自然科学基金(No.2015JJ5028)
Thrust Force Versus Time Curves and Their Prediction in Drilling CFRP With Three Kinds of Drills
QIU Xinyi1, LI Pengnan1, CHEN Anhua2, NIU Qiulin1, HUANG Wenliang1
1.College of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiangtan 411201;2.Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201
Abstract:
In this paper, the two-edged double point angle drill, three-edged double point angle drill and arcshaped drill were used to drill CFRP.The characteristics of drilling thrust force versus time curve are studied.And the model of predicting the time varying curve of thrust force is constructed by using the method of predicting the critical inflection point of the time varying curve.The results show that the thrust force curve of the three-edged double point angle drill is the most stable, it means that the drilling process is the most stable.The maximum thrust force is the three-edged double point angle drill, followed by the arc-shaped drill, and the minimum is the two-edged double point angle drill.So, the two-edged double point angle drill is suitable for drilling CFRP.The thrust force versus time curve constructed by the method of predicting the critical inflection point on the time varying curve of thrust force can predict the thrust force versus time curve of double point angle drill.
Key words:  CFRP  Thrust force  Double point angle drill  Arc shaped drill