顶盖整形工艺分析及模具设计

介绍了汽车上常见的外覆盖件冲压工艺方案的确定过程，并以”郑州尼桑“轻型皮卡”顶盖“为例，针对此件成形难，取件难这一难点，确定了是冲压工序为：拉延、修边、翻边、整形。且着重整形模具的设计要点及整形以后顺利取件等措施。     

固定窗连接板工艺分析及剖切模具改进

介绍了汽车上常见的左右对称盒形件冲压工艺方案的确定过程,并以ＥＱ１０６０Ｆ三吨载货汽车“左／右门里板固定窗连接板”为例,针对平时在生产中易出现的各种问题,进行了详细的冲压工艺分析,确定了合理的冲压工序为：（１）切角拉延;（２）整形,（３）修边冲孔;（４）剖切分离。且着重介绍了剖切模具的设计要点和模具在生产中出现的各中问题及相应的改进方法。     

汽车滑轨安装座级进模设计

分析了汽车滑轨安装座的结构特点和冲压工艺,介绍了排样方案、级进模的总体结构、主要零部件的设计,采用活动凸模结构,解决了取件难的问题。生产实践表明:模具结构紧凑、操作简便、生产效率高,对类似零件的模具设计具有一定的借鉴作用。     

冲压自动线取件模拟分析技术研究

介绍了一种基于DELMIA软件开发出动态冲压自动线取件模拟分析技术,与传统静态干涉曲线检查取件相比,能直观预测实际的匹配状态,并有针对性的进行模具结构优化,避免匹配异常,降低模具开发周期和整改成本。     

新型全自动板料冲裁模结构设计

为改变现有板料冲裁模生产中存在的自动化程度较低的人工送料和取件方式,对板料冲裁模结构设计进行了研究。从工艺方案的确定、模具结构尺寸计算和冲裁力计算等方面阐述了冲裁模设计的流程,设计了新型冲裁模具的自动送料和自动取件装置;并利用3D软件的运动仿真功能对板料冲裁过程进行了模拟。结果表明,设计出的新型自动冲裁模,可以实现冲裁过程中的送料、定位、成形和取件等工序的全自动化生产,极大地提高冲压加工的生产效率,实现冲压加工的完全自动化。     

某车型侧围外板冲压工艺分析及整形模设计

介绍了某轿车侧围外板冲压工艺及整形模设计,从确定冲压方向及拉深深度、避免产生滑移线和冲击线的方法与措施、拉深筋的设计注意事项、CAE模拟等几方面进行了分析,并结合前期车型设计和生产的经验总结,对侧围外板侧整形模结构进行了优化,侧围外板整形模成形零件质量有明显的提高。     

顶盖中横梁工艺分析及成形模具改进

介绍了冲压上常见的“弓”字型零件的冲件工艺的确定过程，并以ＥＱ１０６０Ｆ三吨载货汽车“顶盖中横梁”为例，针对平时在生产中易出现的问题，进行了详细的冲压工艺分析，确定了合理的冲压工序，且着重介绍了压形模具的设计要点和模具在生产中出现的各种问题及相应的改进方法。     

前地板工艺分析及修边冲孔模具设计

介绍了冲压上常见的大型覆盖件的冲压工艺方案的确定过程,并以S01农用皮卡车“前地板”为例,针对此件外形复杂,成形深度大,模具加工周期大,成本高等问题,进行了详细的冲压工艺分析,确定了合理的冲压工序,且郑重介绍了修边冲孔模具的设计要点及简化模具加工工艺,降低模具成本,缩短制模周期等措施。     

U形接触片多工位级进模设计与制造

针对U形接触片的技术要求,确定了合理的冲压工艺方案,阐述了该多工位级进模设计要点,产品质量达到设计要求。同时,还介绍了楔块装置及磷铜薄片整形的微调装置。     

二级浮动弹压复合模设计

分析了脱排油烟机内支架复合冲压成形工艺方案,介绍了相应冲模结构设计。冲压工艺有冲裁、弯曲、不规则翻边、胀形、局部压凸、整形等。为优化冲压工艺,降低生产成本,第2副冲模采用了下模部分二级浮动弹压的结构,成功实现局部胀拉和翻边工艺以及压凸、弯曲、整形多道工序一次成形。     

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.