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Forming characteristics of thin-walled tube bending process with small bending radius LI Heng(李 恒) , YANG He(杨 合), ZHAN Mei(詹 梅), GU Rui-Jie(谷瑞杰) Department of Materials Forming... the plastic deformation characteristics with small bending radius were investigated. The main results show that: 1) The utmost deformation feature of the NC bending process is its continuous progressive......
Trans. Nonferrous Met. Soc. China 22(2012) 147-156 Significance-based optimization of processing parameters for thin-walled aluminum alloy tube NC bending with small bending radius XU Jie, YANG He...; accepted 27 June 2011 Abstract: Thin-walled aluminum alloy tube numerical control (NC) bending with small bending radius is a complex process with multi-factor coupling effects and multi-die......
is much more sensitive to the process parameters and thus it is more difficult to form. Key words: large diameter thin-walled aluminum alloy tubes; small bending radius; numerical control bending... with small bending radius [J]. Journal of Plasticity Engineering, 2007, 8(4): 29-34. (in Chinese) [7] WANG Guang-xiang, YANG He, LI Heng, ZHAN Mei, GU Rui-jie. Experimental study of the influence......
is negative, and the tube thins. Key words: aluminum alloy; shear hydro-bending; small bending radius tube; internal pressure; 3D numerical simulation 1 Introduction Thin-walled tube bending plays... and titanium alloy tubes with small bending radius are required for the space-saving [4-6]. Small bending radius tubes manufactured integrally are more reliable and weight- saving compared with welding parts......
contact stresses between the part and the tool, thus minimizing distortions. A drawback associated with this process is the need for a sufficiently long profile, and a constant bending radius configuration. Roll bending (Fig.3(e)) is typically used for prototyping and other low volume applications. It is well suited for large radius bends, but the precision of the bend is relatively low due......
distortion usually appears during rotary-draw bending process of thin-walled rectangular tube with small bending radius. To study the cross-sectional distortion of the tube, a three-dimensional finite... tight structure and highly complex space call for the tube with high inner surface quality, small bending radius and high precision. So, the prediction and the control of the cross-sectional......
Hz, defocusing amount of 16 mm (spot radius of 0.4 mm). At the same time, the test samples were prepared to 5 mm-width, 10 mm- length and 200 μm-thickness. Figure 8 shows the finally bending effects... Simulation and prediction in laser bending of silicon sheet WANG Xu-yue, XU Wei-xing, XU Wen-ji, HU Ya-feng, LIANG Yan-de, WANG Lian-ji Key Laboratory for Precision and Non-traditional Machining......
J. Cent. South Univ. Technol. (2008) 15: 112-116 DOI: 10.1007/s11771-008-0022-y Failure analysis of polycrystalline diamond compact cutters for breaking rock by bending waves theory...; Abstract: The breakage mechanism of the polycrystalline diamond compact(PDC) cutters was analyzed by the energy theory of bending waves. The cutting tests of granite......
, bending radius, blanking length and initial bending section based on elongation and springback angle are derived. The bending angle, bending radius, blanking length and initial bending section of tube... the elongation of thin-walled tube NC precision bending named "pressure die measuring method" is put forward and the computing equations of bending angle, bending radius, blanking length and initial bending......
. A drawback arrangement is mounted at the underside of the bending arm to eliminate the effect of friction. The lower tool is fixed and has a constant radius. A ridge is integrated in the contact surface... of tangent of bending die at contact point and global horizontal line; L0-Distance from A to theoretical contact point in case profile had remained straight; R-Characteristic die radius) The main task......
