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of transverse and longitudinal crack on the liner tube and die wear were found. The distributions of drawing force and residual contact pressure between the inner and outer pipe were discussed. The effects... parameters cemented carbide drawing dies,the application experiment result shows that the working lifetime of the optimal cemented carbide drawing die can be increased 6 times. Key words: bimetal......
控制臂外片拉深成形过程数值模拟与工艺优化陶立民1,孙文娟1,邵严2,吴晓春2,曹韵牧0(1.上海市上海汇众汽车制造有限公司2.上海大学 材料科学与工程学院,上海 200072)摘 要:建立了控制臂外片拉深成形的有限元三维模型,通过改变拉深成形的关键参数,对其拉深过程进行了数值模拟分析,并研究了影响控制臂外片拉深失效的主要因素.结合有限元分析结果,在生产现场进行整改,基本上消除了控制臂外片在拉深过程中的开裂现象.关键词:控制臂外片； 拉深成形； 数值模拟； 工艺优化......
technology, the demand of finer copper wires has kept rising. Metallic wire drawing technology has advanced possibility of manufacturing the fine wires with a diameter less than 20 μm[1]. Therefore... Texture evolution and its simulation of cold drawing copper wires produced by continuous casting CHEN Jian1, 2, YAN Wen1, 2, LI Wei3, MIAO Jian4, FAN Xin-hui2 1. Department of Applied Physics......
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, LI Jianchao, YUAN Yaning, et al. Flexible die drawing of magnesium alloy sheet by superimposing ultrasonic vibration[J]. Transactions of Nonferrous Metals Society of China, 2017, 27(1): 163-171. [13.... 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......
;Influence of deformation on rockwell hardness and electrical conductivity of cold drawing Cu-1.12%Al2O3 alloy 2.2 拉伸性能分析 Cu-1.12%Al2O3合金具有良好的冷加工能力,其热挤压棒材可以不需要中间退火而直接经多道次冷拉抜加工至规定尺寸.图2所示为热挤压态合金试样拉伸性能随冷拉抜变...冷拉抜态Cu-1.12%Al2O3合金拉伸性能的影响 Fig. 2 Influence of deformation on tensile properties of cold drawing Cu-1.12%Al2O3 alloy 2.3 显微组织分析 图3所示为不同变形量冷拉抜加工Cu-1.12%Al2O3合金的SEM像.从图3中可以看出,合金经过热挤压和冷拉抜加工后......
that the surface roughness values (Ra) in the entry zone, drawing zone and bearing zone of as-fabricated USCD coated drawing die were measured as low as 25.7, 23.3 and 25.5 nm, respectively. Furthermore...-Co drawing dies. Key words: CVD diamond coated drawing die; ultra-smooth composite diamond (USCD) film; friction properties; water-lubricating drawing; dry sliding; water lubrication 1 Introduction......
of spherical cap which is in the free deforming area. Key words: granule medium; aluminum alloy sheet; deep-drawing; hot forming; limit drawing ratio 1 Introduction Flexible-die hot forming technology... is tangent to the fillet of die at the beginning of deep drawing, so it is tangent to the straight wall of die after straight wall is deformed. 3.1 Stress analysis on flange deformation area The micro......
. 10 Loading curves under different forming temperatures (a) and stamping speeds (b) 4 Thermal deep drawing 4.1 Experimental set-up As shown in Fig. 11, deep drawing die consisted of mold base, punch... with high thermal conductivity. Fig. 11 Deep drawing die 4.2 Temperature field simulation The temperature distribution of the die set is shown in Fig. 12. We can see that the temperature on the surface......
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