An Integrated Machining Tool Path Generation Method for Corner and Profile of Aircraft Structural Parts

GAO Xin; LI Yingguang; ZHANG Chen; LIU Changqing; HAO Xiaozhong

doi:10.7527/S1000-6893.2013.0497

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2014 , Vol. 35 >Issue 9: 2660 - 2671

DOI: https://doi.org/10.7527/S1000-6893.2013.0497

Material Engineering and Mechanical Manufacturing

An Integrated Machining Tool Path Generation Method for Corner and Profile of Aircraft Structural Parts

GAO Xin ,
LI Yingguang ,
ZHANG Chen ,
LIU Changqing ,
HAO Xiaozhong

Expand

College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received date: 2013-11-06

Revised date: 2013-12-19

Online published: 2013-12-30

Supported by

National Science and Technology Major Project (2012ZX04010041)

Fold

Abstract

In order to address the issues of cutting steps induced by the separated machining of corners and profiles of aircraft structural parts as well as the increase of the cutting force and vibration due to the sharp change of the feed angle at the corner and the contact cutting angle, an integrated machining process and its tool path generation method are proposed for machining the corners and profiles in aircraft structural parts. In the proposed method, profiles and corners in one pocket are machined in one machining operation. Firstly, the allowance is calculated for finish machining which can guarantee the uniform change of the cutting angle within limits. The machining area is also obtained for subsequent tool path. Then by using the combination principle of maximum and constant contact cutting angle in corner positions, the corner material is removed evenly by multiple passes. Therefore the cutting condition is improved. Clothoid curve segments are adopted so as to smoothen the transition of the tool path, ensure the continuous change of the curvature, as well as reduce the vibration of the machine tool. The cutting experiment results show that the proposed method can improve the conditions of the cutting force, reduce vibration during machining as well as improve the surface machining quality.

Key words： aircraft structural part; profile; corner; machining; cutting force

Cite this article

GAO Xin , LI Yingguang , ZHANG Chen , LIU Changqing , HAO Xiaozhong . An Integrated Machining Tool Path Generation Method for Corner and Profile of Aircraft Structural Parts[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(9) : 2660 -2671 . DOI: 10.7527/S1000-6893.2013.0497

References

[1] Zhang S L, Li Y G, Liu C Q, et al. Loop-analysis-based automatic creation method for bottom finish machining region of pocket feature in aircraft structural parts[J]. China Mechanical Engineering, 2013, 24(13): 1728-1733. (in Chinese) 张石磊, 李迎光, 刘长青, 等. 基于环分析的飞机结构件槽特征腹板精加工区域自动创建方法[J]. 中国机械工程, 2013, 24(13): 1728-1733.
[2] Wu B H, Yan X, Luo M, et al. Cutting force prediction for circular end milling process[J]. Chinese Journal of Aeronautics, 2013, 26(4): 1057-1063.
[3] Choy H S, Chan K W. A corner-looping based tool path for pocket milling[J]. Computer-Aided Design, 2003, 35(2): 155-166.
[4] Choy H S, Chan K W. Enhanced strategy for milling corners[J]. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2002, 216(8): 1135-1154.
[5] Choy H S, Chan K W. Machining tactics for interior corners of pockets[J]. The International Journal of Advanced Manufacturing Technology, 2002, 20(10): 741-748.
[6] Jouaneh M K, Wang Z, Dornfeld D A. Trajectory planning for coordinated motion of a robot and a positioning table. Part I. Path specification[J]. IEEE Transactions on Robotics and Automation, 1990, 6(6): 735-745.
[7] Jouaneh M K, Wang Z, Dornfeld D A. Trajectory planning for coordinated motion of a robot and a positioning table. Part Ⅱ. optimal trajectory specification[J]. IEEE Transactions on Robotics and Automation, 1990, 6(6): 746-759.
[8] Zhao Z Y, Wang C Y, Zhou H M, et al. Pocketing toolpath optimization for sharp corners[J]. Journal of Materials Processing Technology, 2007, 192-193: 175-180.
[9] An L L, Zhou L S, Wang Y G, et al. Tool path generation for fine milling of pocket boundary corners[J]. China Mechanical Engineering, 2005, 16(24): 2188-2192. (in Chinese) 安鲁陵, 周来水, 王玉国, 等. 型腔边界拐角精加工刀轨生成算法的研究[J]. 中国机械工程, 2005, 16(24): 2188-2192.
[10] Wu S X, Li K Z, Wang L. Corner tool path optimization in high speed milling[J]. Machinery Design & Manufacture, 2012, 258(8): 245-247. (in Chinese) 吴世雄, 李开柱, 汪磊. 高速铣削拐角刀具轨迹优化[J]. 机械设计与制造, 2012, 258(8): 245-247.
[11] Banerjee A, Feng H Y, Bordatchev E V. Process planning for corner machining based on a looping tool path strategy[J]. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2011, 225(9): 1578-1590.
[12] Rahman A K M A, Feng H Y. Effective corner machining via a constant feed rate looping tool path[J]. International Journal of Production Research, 2013, 51(6): 1836-1851.
[13] Wang Q K, Chen Y D, Li W, et al. Corner smoothing using PH curve for CNC system[J]. Acta Aeronautica et Astronautics Sinica, 2010, 31(7): 1481-1487. (in Chinese) 王琦魁, 陈友东, 李伟, 等. 基于PH曲线的数控拐角过渡方法[J]. 航空学报, 2010, 31(7): 1481-1487.
[14] Wu Q, Zhang Y D, Zhang H W. Corner-milling of thin walled cavities on aeronautical components[J]. Chinese Journal of Aeronautics, 2009, 22(6): 677-684.
[15] Zhang D L, Zhou L S. Adaptive algorithm for feedrate smoothing of high speed machining[J]. Acta Aeronautica et Astronautics Sinica, 2006, 27(1): 125-130. (in Chinese) 张得礼, 周来水. 数控加工运动的平滑处理[J]. 航空学报, 2006, 27(1): 125-130.
[16] Wang Y G, Zhou L S, An L L, et al. Smooth spiral tool path generation for pocket milling[J]. Acta Aeronautica et Astronautics Sinica, 2008, 29(1): 216-220. (in Chinese) 王玉国, 周来水, 安鲁陵, 等. 型腔铣削加工光滑螺旋刀轨生成算法[J]. 航空学报, 2008, 29(1): 216-220.
[17] Huang X, Zeng R, Yue F J, et al. Application research on NURBS interpolation technique in high speed machining[J]. Journal of Nanjing University of Aeronautics & Astronautics, 2002, 34(1): 82-85. (in Chinese) 黄翔, 曾荣, 岳伏军, 等. NURBS插补技术在高速加工中的应用研究[J]. 南京航空航天大学学报, 2002, 34(1): 82-85.
[18] Pamali A P. Using clothoidal spirals to generate smooth tool paths for high speed machining[D]. Raleigh: North Carolina State University, 2004.
[19] Li M S, Li S Y. The coordinate computational formula of clothoid[J]. Geotechnical Investigation and Surveying, 2002(1): 62-63. (in Chinese) 李孟山, 李少元. 回旋曲线点位坐标计算公式[J]. 工程勘察, 2002(1): 62-63.

Options

Outlines

模态框（Modal）标题

Abstract

Cite this article

References