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DETERMINATION OF BLANK HOLDER FORCE IN SHEET METAL DEEP DRAWING PROCESS Y.J.Luo1,Y.Q.Zhang1,D.N.He1 (1.Department of Plasticity Technology, Shanghai Jiao Tong University, Shanghai 200030, China) Abstract:Blank holder force (BHF) is an important measure to control the sheet metal forming.BHF is identified quickly using artificial neural network (ANN) on the basis of itsanalytical description......
(Variable Blank Holder Force) optimization strategy was employed to determine the optimal time-variable and spatial-variable BHF trajectories, aiming at improving the formability of automobile panels... the applicability of the new VBHF optimization strategy to complex parts with aluminum alloy sheet. Key words: deep drawing; variable blank holder force; aluminum alloy sheet; formability  ......
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of 15mm/s, the limiting drawing ratio can reach 2.5. The simulation results show that, simulation results are consistent with the experimental results. Using variable blank holder force can remarkably... of the formability of box deep drawing using variable blank-holder force[J] . Journal of Shanghai Jiao Tong University, 200, 36(12): 1883-1887. [19]Yoshihara S, Manabea K, Nishimura H. Effect of blank holder......
. 关键词:镁合金;筒形件拉深;应力解析;临界压边力 中图分类号:TG389 文献标识码:A 文章编号:1672-7207(2019)07-1551-07 Critical blank holder force of deep drawing process for magnesium alloy... stress assumption, the stress distribution in the flange zone of magnesium alloy cylindrical drawing was analyzed. The expressions of critical blank holder force for fracture and wrinkling of magnesium......
is ameliorated and the springback is eliminated in the aluminum alloy hot stamping. The wrinkling severity decreases with increasing blank holder force (BHF), but the BHF greater than 15 kN causes the rupture.../s. Key words: aluminum alloy; hot stamping; forming defects; numerical simulation; blank holder force 1 Introduction In the upcoming years, one of the most important challenges to automotive industry......
. 1, where the blank holders in Figs. 1(a) and (b) are flat blank holder and curved blank holder, respectively. Deep drawing tests were conducted using the flat blank holder with a constant force from 3 to 10 kN, which corresponded with different blank sizes. However, using the curved blank holder, the force was reduced to a constant value from 1.5 to 4 kN. The same stamping speed......
by vacuum solidification of the formed part. The results show that a qualified box-shaped part can be obtained when the blank holder force is 2.0 MN and the cavity pressure is 30 MPa. Also, the vacuum... pressure; blank holder force; vacuum curing; finite element simulation 长期以来,飞机,汽车制造企业都在寻求一种具有高比强度,优异的疲劳性能和耐腐蚀能力的新型材料.一方面,飞机及汽车结构的轻量化生产能大大减少燃油消耗;另一方面,这样轻质化的结构有益于交通工具的长途运输,并且能显著提高产品的寿命.为了实现这些目标,荷兰科学家研制出一种新型......
to proceed drawing to investigate the influences the forming temperature, deep drawing speed and blank holder force for the formability of magnesium alloy AZ31B sheets. The results show... that magnesium alloy AZ31B has excellent thermal deep drawing formability. Furthermore the deep drawing speed and the blank holder force have important influences on the deep-drawing process......
of coated steels[J]. Journal of Materials processing Technology, 1996, 58(2/3): 153-159. [12] LIN Zhong-qin, WANG Wu-rong, CHEN Guan-long. A new strategy to optimize variable blank holder force towards... simulation for prediction of variable blank holder force in conical cup drawing[J]. International Journal of Machine Tools & manufacture, 2004, 44(3): 487-494. <上一页 1 2 3 4 5 6 7 8 9 10 ... 3650 下一页 >