钛板刚度对钻削轴向力和出口毛刺的影响

doi:10.7527/S1000-6893.2016.0097

材料工程与机械制造

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钛板刚度对钻削轴向力和出口毛刺的影响

骆彬¹, 张开富¹, 李原¹, 程晖², 刘书暖²

1. 西北工业大学现代设计与集成制造技术教育部重点实验室, 西安 710072;
2. 西北工业大学机电学院, 西安 710072

收稿日期:2016-02-23 修回日期:2016-03-23 出版日期:2016-07-15 发布日期:2016-03-31
通讯作者: 张开富男,博士,教授,博士生导师。主要研究方向:数字化装配技术、复合材料加工技术。Tel:029-88460773,E-mail:zhangkf@nwpu.edu.cn E-mail:zhangkf@nwpu.edu.cn
作者简介:骆彬男,博士研究生。主要研究方向:先进连接技术与装备。Tel:029-88460773,E-mail:bbnroad@163.com;
基金资助:
国家自然科学基金（51305352，51475379)；中央高校基本科研业务费专项资金（3102014JCS05008)

Influence of stiffness on thrust force and exit burr in drilling titanium plates

LUO Bin¹, ZHANG Kaifu¹, LI Yuan¹, CHENG Hui², LIU Shunuan²

1. The Key Lab of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University, Xi'an 710072, China;
2. School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China

Received:2016-02-23 Revised:2016-03-23 Online:2016-07-15 Published:2016-03-31
Supported by:
National Natural Science Foundation of China (51305352, 51475379); the Fundamental Research Funds for the Central Universities (3102014JCS05008)

摘要/Abstract

摘要：

针对弱刚性钛合金薄板钻削过程，从理论和实验两方面研究工件刚度对轴向力和出口毛刺的影响规律。考虑工件变形与轴向力的相互影响，建立弱刚性钛板钻削轴向力预测模型，求解工件变形带来的附加进给率，结合提出的毛刺厚度预测方法和高度累积判定式，实现工件刚度的影响规律分析，并设计以刚度和进给率为变量的钻削实验。实验结果表明，随着工件刚度的减小，轴向力曲线上升段延长、下降段缩短，最大值略微减小；而毛刺高度减小、厚度增加，类型从冠状变为均匀状。轴向力预测曲线与实验曲线趋势相符，峰值预测误差在8%以内；毛刺尺寸和类型的理论分析结果与实验结果具有一致性。工件刚度以改变实际进给率的方式影响钻削过程，因此弱刚性钛板钻削出口毛刺的抑制要综合考虑工件刚度的影响。

关键词: 钛合金, 钻削, 出口毛刺, 工件刚度, 附加进给率, 轴向力

Abstract:

For drilling process of thin titanium plates, the influence of workpiece's stiffness on thrust force and exit burr is investigated experimentally and theoretically. The interaction of workpiece's bending and thrust force has been studied. Additional feed rate caused by bending of workpiece could be obtained through differential of deflection. Then, a model is developed to predict thrust force for plates with low stiffness. Equations for burr thickness calculation and burr growth deciding are also established to analyze the influence of stiffness on burr type and size. Drilling experiments are conducted with varying stiffness and feed rate. Experimental results show that with the decrease of workpiece stiffness thrust force rises slowly, descends quickly, the maximum value decreases slightly; while, burr type changes from crown to uniform, and burr becomes lower and thicker. Predicted curve of thrust force has the same trend with the experimental curves. Predicted errors of maximum values are within 8%. Analytical results of burr type and size agree with the experimental results. Stiffness affects drilling process through changing the actual feed rate, thus stiffness should be considered to control burr in drilling titanium plates with low stiffness.

Key words: titanium alloys, drilling, exit burr, workpiece stiffness, additional feed rate, thrust force

中图分类号:

V262.4

骆彬, 张开富, 李原, 程晖, 刘书暖. 钛板刚度对钻削轴向力和出口毛刺的影响[J]. 航空学报, 2016, 37(7): 2321-2330.

LUO Bin, ZHANG Kaifu, LI Yuan, CHENG Hui, LIU Shunuan. Influence of stiffness on thrust force and exit burr in drilling titanium plates[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(7): 2321-2330.

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E-mail：hkxb@buaa.edu.cn

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钛板刚度对钻削轴向力和出口毛刺的影响

Influence of stiffness on thrust force and exit burr in drilling titanium plates

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