ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Influence of stiffness on thrust force and exit burr in drilling titanium plates
Received date: 2016-02-23
Revised date: 2016-03-23
Online published: 2016-03-31
Supported by
National Natural Science Foundation of China (51305352, 51475379); the Fundamental Research Funds for the Central Universities (3102014JCS05008)
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
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 . DOI: 10.7527/S1000-6893.2016.0097
[1] DORNFELD D A, KIM J S, DECHOW H, et al. Drilling burr formation in titanium alloy Ti-6Al-4V[J]. CIRP Annals-Manufacturing Technology, 1999, 48(1):73-76.
[2] 曲巍崴, 侯鹏辉, 杨根军, 等. 机器人加工系统刚度性能优化研究[J]. 航空学报, 2013, 34(12):2823-2832. QU W W, HOU P H, YANG G J, et al. Research on the stiffness performance for robot machining systems[J]. Acta Aeronautica et Astronautica Sinica, 2013, 34(12):2823-2832(in Chinese).
[3] 王珉, 薛少丁, 蒋红宇, 等. 飞机大部件对接自动化制孔单向压紧力分析[J]. 南京航空航天大学学报, 2012, 44(4):553-558. WANG M, XUE S D, JIANG H Y, et al. One-side pressure-force analysis of automatic drilling of aircraft fuselage section-joint assembly[J]. Journal of Nanjing University of Aeronautics and Astronautics, 2012, 44(4):553-558(in Chinese).
[4] CAPELLO E. Workpiece damping and its effect on delamination damage in drilling thin composite laminates[J]. Journal of Materials Processing Technology, 2004, 148(2):186-195.
[5] KLOTZ S, GERSTENMEYER M, ZANGER F, et al. Influence of clamping systems during drilling carbon fiber reinforced plastics[J]. Procedia CIRP, 2014, 13:208-213.
[6] AURICH J C, DORNFELD D, ARRAZOLA P J, et al. Burrs-analysis, control and removal[J]. CIRP Annals-Manufacturing Technology, 2009, 58(2):519-542.
[7] ZHENG X, DONG D, HUANG L, et al. Research on fixture hole drilling quality of printed circuit board[J]. International Journal of Precision Engineering and Manufacturing, 2013, 14(4):525-534.
[8] KO S L, CHANG J E. Development of drill geometry for burr minimization in drilling[J]. CIRP Annals-Manufacturing Technology, 2003, 52(1):45-48.
[9] KO S L, LEE J K. Analysis of burr formation in drilling with a new-concept drill[J]. Journal of Materials Processing Technology, 2001, 113(1-3):392-398.
[10] BHANDARI B, HONG Y S, YOON H S, et al. Development of a micro-drilling burr-control chart for PCB drilling[J]. Precision Engineering, 2014, 38(1):221-229.
[11] GARG A, TAI K, VIJAYARAGHAVAN V, et al. Mathematical modelling of burr height of the drilling process using a statistical-based multi-gene genetic programming approach[J]. International Journal of Advanced Manufacturing Technology, 2014, 73(1-4):113-126.
[12] KARNIK S R, GAITONDE V N. Development of artificial neural network models to study the effect of process parameters on burr size in drilling[J]. International Journal of Advanced Manufacturing Technology, 2008, 39(5-6):439-453.
[13] 洪华舟, 韦红余, 陈文亮, 等. 航空薄壁件制孔毛刺生长控制工艺研究[J]. 中国机械工程, 2012, 23(19):2312-2316. HONG H Z, WEI H Y, CHEN W L, et al. Control process for drilling burr growth of aerospace thin-walled workpiece[J]. China Mechanical Engineering, 2012, 23(19):2312-2316(in Chinese).
[14] SAUNDERS L K L, MAUCH C A. An exit burr model for drilling of metals[J]. Journal of Manufacturing Science and Engineering, Transactions of the ASME, 2001, 123(4):562-566.
[15] KIM J, DORNFELD D A. Development of an analytical model for drilling burr formation in ductile materials[J]. Journal of Engineering Materials and Technology, Transactions of the ASME, 2002, 124(2):192-198.
[16] CHANG S S F, BONE G M. Burr height model for vibration assisted drilling of aluminum 6061-T6[J]. Precision Engineering, 2010, 34(3):369-375.
[17] SEGONDS S, MASOUNAVE J, SONGMENE V, et al. A simple analytical model for burr type prediction in drilling of ductile materials[J]. Journal of Materials Processing Technology, 2013, 213(6):971-977.
[18] SUI J, SUGITA N, ISHⅡ K, et al. Mechanistic modeling of bone-drilling process with experimental validation[J]. Journal of Materials Processing Technology, 2014, 214(4):1018-1026.
[19] LUO B, LI Y, ZHANG K, et al. A novel prediction model for thrust force and torque in drilling interface region of CFRP/Ti stacks[J]. International Journal of Advanced Manufacturing Technology, 2015, 81(9-12):1497-1508.
[20] TOROPOV A, KO S L. A model of burr formation in the feed direction in turning[J]. International Journal of Machine Tools and Manufacture, 2006, 46(15):1913-1920.
[21] GAO Y, WU D, NAN C, et al. The interlayer gap and non-coaxiality in stack drilling[J]. International Journal of Machine Tools and Manufacture, 2015, 99:68-76.
[22] LAZAR M B, XIROUCHAKIS P. Experimental analysis of drilling fiber reinforced composites[J]. International Journal of Machine Tools and Manufacture, 2011, 51(12):937-946.
[23] 罗蒙. 金属切削过程中毛刺形成机理及控制方法的研究[D]. 上海:上海交通大学, 2007:22-23. LUO M. Mechanism and control methods of burr formation in metal cutting process[D]. Shanghai:Shanghai Jiao Tong University, 2007:22-23(in Chinese).
/
| 〈 |
|
〉 |
CJA