基于UG NX V1.0线轴注射模三维设计

UG NX V1.0软件具有强大的三维造型功能，特别适用于复杂曲面。本文介绍了UG NX V1.0零件建模模块中的旋转、拉伸、草图、阵列、打孔、倒圆等实体特征和一些曲面特征，构造出塑料线轴的三维数据模型，在此基础上，逐步完成了线轴的注射模设计。     

基于UG注射模设计的自动分模和手动分模方法

UG软件广泛地应用在注射模设计中,本文介绍了分模原理,并结合实例研究UG软件在注射模设计中的应用。介绍了自动分模和手动分模方法,两种方法的灵活应用可以缩短模具设计周期,提高注射模设计的效率。     

基于UG的注射模设计系统开发

介绍了基于UG的注射模设计系统开发的关键技术,包括UG调用MFC对话框的接口技术、参数化建模技术和数据库的访问技术,确定了系统的总体设计方案和功能模块。通过实例介绍了系统进行注射模设计的过程。该系统的开发有利于注射模零件库和零件尺寸参数库的管理,提高注射模设计效率。     

基于UG的注射模CAD系统研发与应用

在研究UG二次开发及UG/Mold Wizard构造方法的基础上,基于UG研究开发了产品及其注射模CAD系统,建立模架及其标准件库管理模块,生成零件的模型库。给出了注射模CAD模块的总体设计流程,系统可以有效提高模具设计和制造的自动化水平。     

基于UG NX V3.0的三通管件注射模设计与制造

介绍了以UG NX V3．0作为模具开发平台设计三通管件注射模的过程，探讨了注射模设计的一般方法，解决了设计与制造过程中的一些难点，实现了智能软件与实际设计的结合。提高了模具设计的效率及塑料制品的生产效率。     

冰箱门柱多向侧抽芯注射模设计

结合冰箱上门左、右柱塑件侧面存在侧凹和侧凸特征需要多向侧抽芯脱模的要求,应用UG NX设计了1模2腔、4向8组侧抽芯机构及其注射模,针对塑件窄长及其内部结构复杂的特点,采用了复合的浇注方式,并设计了镶拼式成型零件和立体循环式冷却水路。实践证明,模具设计合理,结构紧凑,工作稳定。     

基于UG NX V3.0的三通管件注射模三维建模

介绍了以UG NX V3.0作为模具开发平台设计三通管件注射模的过程,探讨了注射模设计的一般方法,解决了设计与制造过程中的一些难点,实现了智能软件与实际设计的结合,提高了模具设计的效率及塑料制品的生产效率。     

CAD／CAE／CAM技术在塑料产品注射模中的应用

利用三维设计软件UG5．0对塑料产品进行了建模及注射模设计,并进行了型腔加工程序的编制;同时用CAE分析软件Mold Flow Plastics Insight5．0对产品进行了注射时的模流分析。通过分析表明,在塑料产品注射模设计制造中应用CAD,CAE／CAM技术,可以缩短生产周期,减少工人劳动强度,获得最佳的产品质量。     

MP3壳体注射模设计

以MP3壳体为例,介绍了基于UG的注射模设计过程。     

基于UG的微动开关注射模辅助设计系统开发

通过分析微动开关注射模设计存在的问题,将UG二次开发技术结合案例推理(CBR)开发建立微动开关注射模辅助设计系统,利用UG/Open Menu Script、UG/Open UIStyler实现用户界面及对话框设计,利用UG/Open API和基于VS2010编译软件进行的C/C++编程链接UG8.5实现各个模块功能相互转换,最终实现注射模零件材料智能选择、标准件库调用、非标准常用件三维快速设计、微动开关注射工艺参数分析设计及工艺参数Excel表格生成等功能模块,对微动开关模具设计实现标准化、知识化以及提高设计效率与质量具有积极意义。     

Effects of Post-weld Heat Treatment on Microstructure,Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.     

The First Phase of the SRIF Industrialized Base in ＂West Area＂ Has Been Put into Operation

After nearly two years＇ tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry （SRIF）, located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.     

新型的治疗阿尔茨海默氏症药物(1-二甲基磷酰基-2,2,2-三氯)-乙基-1-醇烟酸醋对体外神经细胞的作用

目的: 观察本实验室合成的一种治疗阿尔茨海默氏症(AD)的药物(1-二甲基磷酰基-2, 2, 2 -三氯)-乙基^-1-醇烟酸醋(NMF),对体外培养的皮层神经细胞活性的影响以及对海人藻酸(KA)所致的神经损伤的保护作用。方法: 采用体外培养皮层神经元的方法,解剖分离 15 d胚胎小鼠皮层神经细胞, 接种于 96孔板,48 h 后加药并培养 72 h,以 MIT 法 观察 NMF 对小鼠皮层神经细胞活性的影响;同时将接种于 24 孔板的细胞预先给予 NMF,d 3 时加或不加KA处理后,以台盼蓝染色鉴别并计数死、活细胞,可得出细胞的存活率。结果: NMF 明显促进胎鼠皮层神经元活性,其中 NMF1、0. 1、10nmol·L^-1促进神经元活性增殖率分别高达 34.7%、37.4%、36. 7%, NMF 明显促进正常胎鼠皮层神经元存活卒,与对照组比较,10nmol·L^-1 NMF 对皮层神经元的存活率分别提高 39.3%、73.5%。 NMF能显著 对抗 KA 所致的神经元损伤,与 KA 损伤组相比, NMF0.1、10、10nmol·L^-1对损伤皮层神经元的保护率分别为 77.30%、80.10%、84.15%。结论: NMF 明 显促进胎鼠皮层神经元的洁性、提高正常皮层神经元,的存活卒,并能有效地保护KA所致的神经元损伤,提示 NMF 是一种很有潜力的治疗 AD 的药物。     

THERMODYNAMICS STUDY ON THE DECOMPOSITION OF CHROMITE WITH KOH

Institute of Process Engineering, Chinese Academy of Sciences, China, has proposed a method for oxidative leaching of chromite with potassium hydroxide. Understanding the mechanism of chromite decomposition, especially in the potassium hydroxide fusion, is important for the optimization of the operating parameters of the oxidative leaching process. A traditional thermodynamic method is proposed and the thermal decomposition and the reaction decomposition during the oxidative leaching of chromite with KOH and oxygen is discussed, which suggests that chromite is mainly destroyed by reactions with KOH and oxygen. Meanwhile, equilibrium of the main reactions of the above process was calculated at different temperatures and oxygen partial pressures. The stable zones of productions, namely, K2CrO4 and Fe2O3, increase with the decrease of temperature, which indicates that higher temperature is not beneficial to thermodynamic reactions. In addition, a comparison of the general alkali methods is carried out, and it is concluded that the KOH leaching process is thermodynamically superior to the conventional chromate production process.     

INFLUENCE OF HEAT TREATMENT ON DAMPING BEHAVIOUR OF THE MAGNESIUM WROUGHT ALLOY AZ61

The effect of isochronal heat treatments for 1h on variation of damping, hardness and microstructural change of the magnesium wrought alloy AZ61 was investigated. Damping and hardness behaviour could be attributed to the evolution of precipitation process. The influence of precipitation on damping behaviour was explained in the framework of the dislocation string model of Granato and Lücke.     

Theoretical Analysis for the Motion and Temperature of Melt Droplets in Spray Degassing Process

The motion of melt droplets in spray degassing process was analyzed theoretically. The height of the treatment tank in spray degassing process could be determined by the results of theoretical calculation of motion of melt droplets. To know whether the melt droplets would solidify during spraying process, the balance temperature of melt droplets was also theoretically analyzed. Then proof experiments for theoretical results about temperature of melt droplets were carried. In comparison, the experimental results were nearly similar to the calculation results.     

Growth Kinetics of Single Inclusion Particle in Molten Melts

On the basis of the single-particle framework, a new theory on inclusion growth in metallurgical melts is developed to study the kinetics of inclusion growth on account of reaction and collision. The studies show that the early growth of inclusion depends on reaction growth and Brawnian motion collision, and where the former is decisive, the late growth depends on turbulence collision and Stokes＇ collision, and where the former is dominant; collision growth is very quick during the smelting process, lessened in the refining process, but nearly negligible in the continuous casting process.     

An Easy Way to Quantify the Adhesion Energy of Nanostructured Cu/X(X=Cr,Ta,Mo,Nb,Zr) Multilayer Films Adherent to Polyimide Substrates

An approach based on film buckling under simple uniaxial tensile testing was utilized in this paper to quantitatively estimate the interfacial energy of the nanostructured multilayer films(NMFs) adherent to flexible substrates. The interfacial energies of polyimide-supported NMFs are determined to be *5.0 J/m2 for Cu/Cr, *4.1 J/m2 for Cu/Ta,*2.8 J/m2 for Cu/Mo, *1.1 J/m2 for Cu/Nb, and *1.2 J/m2 for Cu/Zr NMFs. Furthermore, a linear relationship between the adhesion energy and the interfacial shear strength is clearly demonstrated for the Cu-based NMFs, which is highly indicative of the applicability and reliability of the modified models.     

High-Speed Friction Stir Welding of SiC_p/Al–Mg–Si–Cu Composite

A 17 vol% SiCp/Al–Mg–Si–Cu composite plate with a thickness of 3 mm was successfully friction stir welded(FSWed) at a very high welding speed of 2000 mm/min for the first time. Microstructural observation indicated that the coarsening of the precipitates was greatly inhibited in the heat-affected zone of the FSW joint at high welding speed, due to the significantly reduced peak temperature and duration at high temperature. Therefore, prominent enhancement of the hardness was achieved at the lowest hardness zone of the FSW joint at this high welding speed, which was similar to that of the nugget zone. Furthermore, the ultimate tensile strength of the joint was as high as 369 MPa, which was much higher than that obtained at low welding speed of 100 mm/min(298 MPa). This study provides an effective method to weld aluminum matrix composite with superior quality and high welding efficiency.     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.