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for large die-forging hydraulic press under extremely low speed YANG Jiawang, HUANG Minghui, LU Xinjiang, DENG Kan (The State Key Laboratory of High Performance and Complex Manufacturing,Central South University, Changsha 410083, China) Abstract: The large die-forging hydraulic press is a nonlinear system of electro-hydraulic coupling. Because friction is inevitable, it will cause the speed......
STUDY ON DESIGN TECHNIQUES OF A LONG LIFE HOT FORGING DIE WITH MULTI-MATERIALS H.C. Wang1,X.J. Liu1,D.W. Li1 (1.School of Materials Science and Engineering, Wuhan University of Technology,Wuhan 430070, China) Abstract:A new design technique for the long life hot forging die has been proposed. By finite elementanalysis, the reason for the failure of hot forging die was analyzed......
方式为喷雾润滑. 图1 7A85铝合金航空接头锻件照片 Fig. 1 Photo of designed 7A85 aluminum aviation forging 表1 7A85铝合金的化学成分 Table 1 Chemical composition of 7A85 aluminum (mass fraction,%) 2 结果... of load and velocity versus stroke during isothermal forging 图3 航空接头锻坯结构示意图 Fig. 3 Schematic diagram of preform of aviation forging 图4 航空接头终锻件结构示意图 Fig. 4 Schematic diagram......
~30 ℃,锻比应大于4时,棒材具有良好的室温拉伸性能,可完全满足国标GB/T2965-2007要求. 关键词:TC10钛合金；锻造比；相变点；镦拨变形 中图分类号:TG 146.2 文献标志码:A Effects of forging technics on performance of TC10 titanium alloy stick CHEN Guo-cai, YANG Wen-jia, CHEN Su, CHAO Lei (Shenyang Hengyunda Titanium Development Limited Company, Shenyang 110102, China) Abstract: The effects of forging technic parameters......
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. The compaction process was carried out using suitable punch and die in 40 k N hydraulic press, and sintering was done in an electric muffle furnace at the temperature of 590 °C for 3 h. The sintered......
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control method, and the result is better than the traditional control method. Key words: forging press; hierarchical control; subspace identification; model prediction control 现代一些特殊行业如船舶,航空,深海作业对整体式构...模型 Fig. 6 United simulation model of driving system of die forging hydraulic press 活动横梁的运动学方程为: (10) 式中:KL为伺服比例流量阀增益；u为伺服比例阀输入电压；V为柱塞缸油液容积；ct为柱塞缸泄漏系数；p1为柱塞缸容腔压力；βe为油液体积弹性模量；x为柱塞下行位移；M为活动横......
MODELING OF MICROSTRUCTURAL EVOLUTION IN MICROALLOYED STEEL DURING HOT FORGING PROCESS Z. Zhao1,J. Chen1,X.Y. Ruan1,J. Wang1 (1.National Die & Mold CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai 200030, China) Abstract:The microstructural evolution of microalloyed steel during hot forging process was investigated using physical simulation experiments. The dynamic......
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