| تعداد نشریات | 24 |
| تعداد شمارهها | 851 |
| تعداد مقالات | 7,575 |
| تعداد مشاهده مقاله | 13,413,771 |
| تعداد دریافت فایل اصل مقاله | 11,580,469 |
Analysis of the Rotary-draw Bending Process for Thin-walled Rectangular Aluminum Tube | ||
| Iranian Journal of Materials Forming | ||
| دوره 7، شماره 1، تیر 2020، صفحه 70-83 اصل مقاله (1.49 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijmf.2019.34008.1132 | ||
| نویسندگان | ||
| S. M. Seyyedhatami؛ H. Lexian* | ||
| Faculty of Material & Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran | ||
| چکیده | ||
| The Rotary-Draw Bending (RDB) process is a distinguished process employed for the precision cold bending of a hollow tube with small radius bends using Numerical Control (NC) machines. This research presents an analytical model based on the power law hardening model for the RDB processing of rectangular thin tubes. Based on the constraints of the tube in the dies and its thinness, the plane stress assumption in the thickness direction and the plane strain assumption in the transverse direction for all faces of the tube are used. By assuming the proportionality of the process and using the Levy–Mises flow rule hypothesis, the stress filed of the tube is predicted and the balance of the forces in all aspects of the tube is used to identify the position of the neutral axis. Then the bending moment as well as the amount of the spring back is developed analytically. By analyzing the geometry of the tube and the process, a new mandrel is designed and constructed. The process has been modeled and analyzed using the explicit finite element ABAQUS commercial code and also carried out experimentally. Comparison of the analytical, numerical and experimental strain fields shows good agreement. | ||
| کلیدواژهها | ||
| Rotary-draw bending؛ Rectangular cross sections؛ Analytical analysis؛ Power law hardening model | ||
| مراجع | ||
|
[1] G. Y. Zhao, Y. L. Liu, Sh. Tian, H.Yang, Side wrinkling characteristics in rotary-draw bending process of thin-walled rectangulare 3A21 tube, Materials Science Forum 697-698 (2012) 356-360. [2] J. T. Cmfge, Benedict, R. F. Veilleux, Tools and manufacturing engineer’s handbook SME. Society of manufacturing engineers (SME), Michigan, (1984). [3] S. L. Semiatin, Metals handbook, ASM, Ohio-Metals Park, (1988). [4] K. X. Liu, Y. L. Liu, H. Yang, An analytical model for the collapsing deformation of thin-walled rectangular tube in rotary draw bending, International Journal Advanced Manufacturing Technology 69 (2013) 627-636. [5] G. Zhao, Y. Liu, R. Zhang, H. Yang, Optimal design of process parameters of rotary-draw bending process for thin-walled rectangular tube of aluminum alloy, Journal of Engineering Manufacture 228 (2014) 1442-1448. [6] G. Y. Zhao, Y. L. Liu, H. Yang, Numerical simulation on influence of clearance and friction on wrinkling in bending of aluminum alloy rectangular tubes, Materials Science Forum 546-549 (2007) 833-838. [7] G. Y. Zhao, Y. L. Liu, H. Yang, C. H. Lu, R. J. Gu, Three-dimensional finite-elements modeling of rotary-draw bending process for thin-walled rectangular tube, Materials Science and Engineering 499 (2009) 257-261. [8] K. Liu, Y. Liu, H. Yang, Experimental and FE simulation study on cross-section distortion of rectangulare tube under multi-die constraints in rotary draw bending process, International Journal of Precision Engineering and Manufacturing 15 (2014) 633-641. [9] Sh. Tian, Y. Liu, H. Yang, Effects of geometrical parameters on wrinkling of thin-walled rectangular aluminum alloy wave-guide tubes in rotary-draw bending, Chinese Journal of Aeronautics 26 (2013) 242-248. [10] Z. Xing, Z. Xu, H. Yang, Ch. Lei, Numerical research on high-strength rectangular section steel tube in rotary-draw bending, Key Engineering Materials 620 (2014) 417-423. [11] H. Shen, Y. Liu, H. Qi, H. Yang, Sh. Zhou, Relations between the stress components and cross-sectional distortion of thin-walled rectangular waveguide tube in rotary draw bending process, International Journal Advanced Manufacturing Technology 68 (2013) 651-662. [12] F. Paulsen, T. Welo, O. P. Sovik, A design method for rectangular hollow sections in bending, Journal of Materials Processing Technology 113 (2001) 699-704. | ||
|
آمار تعداد مشاهده مقاله: 403 تعداد دریافت فایل اصل مقاله: 555 |
||