硬化材料弹塑性高精元二次规划解的自校正理论及应用

建立了自校正参变量势能变分原理，并建立起相应的高精有限元计算格式；在推导各向同性硬化材料的加载面线化方程的基础上，建立起弹塑性问题的高精元二次规划解格式；该算法方案涉及大规模数值计算，由此，对大规模二次规划求解策略进行了研究，并由算例验证了其正确性和可行性。提出的理论与算法体系对于计算大型工程机械产品的构件内力与形变有广泛的应用前景。     

基于元模型的可定制产品数据模型研究

作为管理企业智力资产的主要工具,PDM/PLM系统只要具有了灵活的架构、快速部署的能力、强大的扩展性和开放性,才能真正具有竞争力,在市场中占据一席之地.为此提出了基于元模型的可定制产品数据模型,首先分析了可定制数据模型的内涵,论述了支持数据模型定制的产品数据管理的体系结构,建立了产品元模型结构,阐述了数据模型定制机制.通过定制实现了产品结构设计阶段的数据模型,最后在山东山大华天软件公司的PLM系统InforCenter中实现,并在某船厂成功应用实施.通过定制产品设计阶段数据模型和成功的实施应用,说明该理论具有理论和实际意义.     

基于可拓理论的数控代码转换系统的研究

为了解决ISO6983标准的数控(NC)代码共享问题,研究了一种基于可拓理论的数控代码转换系统.系统的信息定制模块根据机床基本性质、程序格式、代码功能复合元模型,完成对应信息的存储;系统的核问题求解模块负责代码功能参数的转换、代码功能的分解和程序格式的转换;系统的源系统代码输入模块通过运动变换矩阵完成机床类型的选择、代码的输入和代码的词法语法分析;系统的中间文件生成模块根据STEP标准的生成中间文件;系统的目标系统代码生成模块对代码进行最优选择和转换.系统的性能取决于三个复合元和核问题解的的完备性.     

Pro／E环境下快速生成工程图的技巧

研究了Pro/E三维环境和二维工程图环境下对系统选项设置、格式文件定制、模板文件定制及图纸制作中不符合国家标准情况下的处理方法和技巧.并通过自制模板,在Pro/E环境下快速、方便地生成符合国家标准的二维工程图.所述方法免去了在三维CAD软件和二维CAD软件之间转换工程图的麻烦,又能充分利用Pro/E全尺寸相关的特点,提高了设计效率,是一个可行的二维工程图国家标准化解决方案.     

SiC_(sf)/Si_3N_(4p)混杂增强BAS陶瓷基复合材料的制备及其结构与性能的研究

采用热压烧结方法制备出致密的SiC短纤维和Si_3N_4颗粒复合增强的BAS玻璃陶瓷基复合材料.利用XRD、SEM、TEM和3点弯曲等分析测试手段研究了物相组成、显微结构、界面结构及室温力学性能.结果表明,BAS能有效地促进复合材料的致密化和实现Si_3N_4的α→β相转变.复合材料中的BAS为六方相,SiC短纤维具有热压取向性,与BAS基体之间的界面结合紧密.SiC短纤维和Si_3N_4颗粒对BAS有较为显著的强韧化效果,复合材料的室温弯曲强度和断裂韧性为298 MPa和4.38 M Pa·m~(1/2),比纯六方BAS玻璃陶瓷分别提高了247%和143%.     

混合硅烷体系中双-( 3-三甲氧基硅基丙基) 胺硅烷水解度的研究

在金属表面硅烷化处理的工业过程中,测定硅烷工作液的水解度是确定硅烷有效利用率和建槽过程中浓缩液稀释倍数的重要依据。以双-(3-三甲氧基硅基丙基)胺(BAS)和乙烯基三乙酰氧基硅烷(VTAS)的混合硅烷体系为研究对象,通过分光光度法测定了不同稀释程度下和不同BAS/VTAS配比条件下,混合体系中主要成分BAS的水解度。结果表明:加水稀释和提高BAS在混合硅烷中的比例,均能够进一步提高BAS的水解程度。     

可定制柔性编码系统模型的研究与实现

为满足企业对事物编码的多样化需求,在研究编码系统功能和编码基本原则的基础上,分析编码系统组成要素在可定制柔性方面的相关需求,阐述了可定制柔性编码系统的结构模型和功能模型,设计了系统数据信息存储的具体结构,并就有关编码复制、编码解析和识别码生成等关键技术给出了具体的实现步骤.最后介绍了编码系统模型在产品数据管理系统中的应用.     

贵金属二次资源化技术进展

阐明了贵金属二次资源的再生背景、意义及废料的主要来源,总结了目前国内外从贵金属二次资源中再生责金属的火法冶金处理技术、湿法冶金处理技术和生物处理技术的研究成果,并作了分析比较.在不断追求经济有效、环境友好的金属再生技术的基础上,对各种技术进行优化组合,实现贵金属高效再生.     

模架企业定制化制造业务管理系统研究

现代模架生产主要是按客户订单安排生产.本文通过对国内模架制造企业定制化生产业务链的分析,探讨了报价业务数据流过程及数据信息在不同部门间的共享集成,并采用B/S三层结构模式和SQL Server数据库技术,开发了应用于模具企业的定制化制造业务管理系统,详细阐述了系统模块构成及主要模块的实现.     

Carine软件在电子衍射花样标定中的应用及拓展

在研究了Carine软件应用的同时,对软件进行了分析与评价,并在Carine软件对单晶电子衍射花样进行标定的基础上,提出了一种新的对复杂电子衍射花样标定的方法.对此方法进行了验证,发现和传统的手工法相比:简单,方便,也易操作.     

国内外缝纫机零件热处理现状与发展方向

介绍了国内外缝纫机零件热处理装备和技术现状，分析了国内外缝纫机零件热处理的差异，简述了缝纫机零件热处理的发展动向及其新工艺的开发和应用情况。     

Movement patterns of ellipsoidal particle in abrasive flow machining

Abrasive particle movement pattern is an important factor in estimating the wear rate of materials, especially, as it is closely related to the burring, buffing and polishing efficiency of the abrasive flow machining (AFM) process. There are generally two kinds of particle movement patterns in the AFM process, i.e. sliding–rubbing and rolling. In mechanism, AFM particle–workpiece interaction is taking place in any one or a combination of the possible modes: elastic/plastic deformation by grooving particle movement; elastic/plastic deformation by rolling particle movement; chip formation (micro-cutting) by grooving particle movement, ridge formation by grooving and rolling particle movement, and low-cycle fatigue wear. Grooving particle movement pattern has a greater contribution to wear mass loss of workpiece than rolling mode. Considering the machining efficiency of a machine part is predominantly dependent upon its wear mass loss speed, it can be concluded that particle movement patterns are key parameters to machining efficiency in AFM. In this paper, ellipsoidal particles are investigated to understand particle movement patterns. An analytical model of ellipsoidal geometry to determine particle movement patterns in AFM is proposed with given particle ellipticity, normal load, particle size and material hardness. From the analytical model and particle movement pattern criterion proposed by the present authors, a statistic prediction of particle movement patterns is completed by computer programmed by C++ language. It is found that a seat position of ellipsoid is an easy grooving position for a particle and a large ellipticity value predominantly increases grooving particle numbers. Smaller workpiece hardness, larger particle radius and higher normal load promote grooving of the particles. Sharper particles are much more easy to groove; moreover, grooving pattern will be predominant if particle ellipticity is below 0.8. Increasing workpiece hardness tends to decrease grooving regime while other parameters are fixed in AFM process. In three-body abrasion, hard material paired with soft material will result in more rolling particles. Abrasive contour and material hardness in many variables are two predominant parameters to give distinct influence on particle movement pattern.     

Express screening of biological objects using multisensory inversion voltammetry with pattern recognition

Express diagnosis of biological objects is required for operative preliminary estimation of various states of the organism. A new method is proposed for recognition of multidimensional patterns obtained by analysis of multisensory voltammograms of electrochemical test system in the formats of “electronic tongue” and “electronic nose” formats. These formats are realized in the process of electrochemical studies of liquid and gaseous phases. The proximity of the obtained pattern of the tested object to the known patterns accumulated in the database is estimated. Examples of express diagnosis of glaucoma based on the results of electrochemical studies of blood serum are provided.     

改造型花纹铣床加工工艺的研究与应用

针对普通CW61100车床被改造成数控花纹铣床后遇到主轴温度高报警、花纹辊寿命低、花纹辊易剥落等问题,采取优化机械结构和加工工艺、改善花纹孔型等措施,使花纹铣床满足了产品生产的需要,节约了成本,提高了生产效率。     

High-Performance NC for HSM by means of Polynomial Trajectories

This paper summarises works carried out for defining tool trajectory formats well adapted to High Speed Machining (HSM). Advantages in using native polynomial formats, calculated directly from the CAD model, are highlighted. In particular, polynomial surface formats are presented as a generic format for tool trajectory. Illustrations show that surface formats represent a good compromise between smoothness machining time, and surface quality.     

新流量阀与PLC控制新回路及其应用

在已有液压回路的基础上,提出了一种新的、用于实现动力滑台运动的二工进调速阀的两工进速度换接回路,给出了其组成图和工作原理.采用FX2N-32MR型PLC设计了其控制系统,得出了新回路及其控制系统的特点,展现了PLC在工业控制领域的广阔应用前景.并介绍了新回路在机械加工中的应用.     

反凸轮机构在多工位冲模排废料装置中的应用

利用反凸轮机构成功地解决了机针多工位冲模废料如何排料的难题 ,并介绍了排废料装置的结构。实践证明 ,该装置结构紧凑 ,动作可靠     

消失模铸造模成型机的特点及应用

介绍了消失模铸造工艺对成型机的特殊要求,高性能成型机在大规模工业化消失模生产中的重要性,重点阐述了德国Teubert公司TVY130/90消失模成型机的特点及应用,并对成型机的国产化研究与开发提出了建议。     

烧结机尾固定筛篦条的消失模铸造

烧结机尾固定筛篦条上的条形孔具有长、窄、深的特点。文中从泡沫塑料模样的制作、涂料配方、涂料涂敷及干燥方法、浇注位置及浇注系统的确定、装箱振实操作步骤、浇注、打箱等方面介绍了消失模铸造生产固定筛篦条的工艺方案。实践表明，采用消失模铸造生产的固定筛篦条产品表面质量、性能指标均能保证使用要求。     

Preparation of textile preform with sewing machines and bending properties of stitched woven glass fibre fabrics

With the increasing demand of light structure composite in industry, carbon and glass fibres are more and more used, because of their light mass, high strength, high temperature endurance and erosion resistance. This paper focuses on the process of forming a preform. Up to the finished preform, the multilayer reinforced fabrics are subjected to the following procedures., pattern design, cutting and sewing. Considering the fabric properties, the 3dimensional CAD software and sewing machines, which are generally used in the clothing industry, are also suitable for the processing of the reinforced fabrics. This study aims also to the changes of property arising from the sewing process. Bending stiffness and changes of thickness after sewing are studied. These properties will provide input data for CAD pattern design.