模具材料研究与应用现状及发展趋势

详细介绍了3种常用金属模具材料的国内外研究与应用现状,列举出常用模具钢的化学成分和热加工工艺,并介绍了金属模具材料的表面强化处理技术,提出了目前金属模具材料存在的问题及发展趋势。将国内外模具材料进行对比,总结出国内模具材料缺乏竞争力的根本原因是模具材料的种类少、质量参差不齐、配套体系不完善、售后服务跟不上等,针对模具各零件性能要求的不同,提出企业不同的模具零部件采用不同材料的观点。     

第十届中国国际模具技术和设备展览会模具水平评述

对第十届中国国际模具技术和设备展览会上展出的各类模具、模具标准件、模具材料进行了水平分析 ,分析了我国模具、模具标准件、模具材料的技术进步及存在的问题 ,提出了我国模具技术发展方向。     

《中国模具材料及配件大全》10周年特刊众筹合作方案

正《中国模具材料及配件大全》一书从2006年迄今已成功出版了9次(前称为《模具大黄页》),该书由深圳市模具技术学会、模具制造杂志社联合出版,已累计发行28万册,作为目前唯一以模具材料、模具配件为主题的年度盛会"全球模具材料及配件应用交流大会"活动会刊,该书不仅对国内外模具材料及配件行业精英进行了积极的宣导,而且集中展示了国内外模具材料、模具配件企业风采,堪称"模具制造宝典",被模具界人士视     

第十届中国国际模具技术和设备展览会模具水平评述

对第十届中国国际模具技术和设备展览会上参展的各类模具、模具标准件、模具材料进行了水平分析，分析了我国模具、模具标准件、模具材料的技术进步和存在的问题，指出了我国模具技术的发展趋势。     

第十二届中国国际模具技术和设备展览会模具水平评述

对第十二届中国国际模具技术和设备展览会参展的各类模具、模具标准件及模具材料等进行了评述,介绍了我国模具、模具标准件、模具材料和模具CAD/CAE/CAM技术的现状及技术进步,分析了我国模具技术的发展趋势和存在问题.     

第十六届中国国际模具技术和设备展览会模具水平评述

对第十六届中国国际模具技术和设备展览会展出的各类模具、模具标准件及模具材料等进行了评述,介绍了我国模具、模具标准件、模具材料和模具CAD/CAM/CAE技术的发展现状和技术水平,分析了我国模具技术的发展趋势。     

第十五届中国国际模具技术和设备展览会模具水平评述

对第十五届中国国际模具技术和设备展览会展出的各类模具、模具标准件及模具材料等进行了水平评述,介绍了我国模具、模具标准件、模具材料和模具CAD/CAE/CAM的发展现状和技术水平,分析了我国模具技术的发展趋势。     

第十一届中国国际模具技术和设备展览会模具水平评述

通过对第十一届中国国际模具技术和设备展览会上参展的各类模具、模具标准件、模具材料等进行的水平评述,介绍了我国模具、模具标准件、模具材料的发展现状和技术进步,分析了我国模具技术的发展趋势。     

第十一届中国国际模具技术和设备展览会模具水平评述

通过对第十一届中国国际模具技术和设备展览会上参展的各类模具、模具标准件、模具材料等进行的水平评述,介绍了我国模具、模具标准件、模具材料的发展现状和技术进步,分析了我国模具技术的发展趋势。     

第十四届中国国际模具技术和设备展览会模具水平评述

对第十四届中国国际模具技术和设备展览会上展出的各类模具、模具标准件及模具材料等的水平进行了评述,介绍了我国模具、模具标准件、模具材料和模具CAD/CAE/CAM的发展现状和技术水平。     

A 3-D modular fixture with enhanced localization accuracy and immobilization capability

Modular fixtures are distinguished for their high flexibility. Previous researches focused on 2-D objects or 3-D objects with regular geometry. This paper introduces our systematic study of 3-D modular fixtures, particularly for complex objects. For the sake of both function and simplicity, three baseplates are arranged equilaterally. One baseplate is fixed horizontally, on which three fixels are installed to support the object. The other baseplates are moveable and at least one fixel is set on either of them. Totally, seven fixels are adopted. Efficient algorithms are presented for computing optimal fixel locations for the given object pose regarding localization accuracy and immobilization capability. On account of the manufacturing errors, measuring and adjusting techniques are developed to improve the localization accuracy. Case studies are investigated to illustrate applications. Experiments are performed for verifying the principles, including the well-known theoretical proposition that seven fixels are necessary and sufficient for fixturing a 3-D object of nonrevolutionary surface.     

Liquid-crystalline phthalocyanine-based nanostructures

Structural peculiarities of mesogenic phthalocyanines and their derivatives are considered. Liquid-crystalline materials based on self-assembled phthalocyanine molecules are promising novel functional materials for sensors, as catalysts, optically and bioactive matrices, and semiconductor cells. Mesomorphic and electrophysical characteristics of liquid-crystalline phthalocyanine-based materials are considered, possibilities of their use are discussed, and the structure-property relations are analyzed.     

镁合金抗氧化及合金化阻燃研究进展

综述了镁合金氧化燃烧及燃点的测定方法、镁合金抗氧化和阻燃机理及合金元素(Ca，Be，RE，Y)对镁合金阻燃性能影响的研究现状。介绍了抗氧化和阻燃镁合金研制进展及应用现状，指出了研究中存在的问题及发展方向。     

Suspension and solution thermal spray coatings

The emerging methods of coating deposition by suspension and solution thermal spraying are described. The liquid suspensions of fine powders and liquid precursors are injected into flames and/or jets generated in the torches. The formulation and stability of suspensions as well as the methods of fine powders synthesis are briefly described. Typical solutions, being often the liquid organo-metallics are also briefly described. An important problem of injection of liquids into jets and flames is then presented. Two principal modes of injection, used at present, are outlined, i.e.: (i) atomization; and, (ii) injection of a continuous jet. Subsequently, the phenomena occurring in flames and plasma jets are discussed and the major differences to these occurring during conventional spraying are stressed up. The build up of coatings starting from the impact of fine particles on the substrate is described and typical microstructures of suspension and solution sprayed coatings are shown. Some properties of the sprayed coatings, including mechanical, electrical, chemical, and thermophysical ones are collected and presented. Finally, the emerging applications of coatings are shown and the possible future applications are discussed.     

平板类气体辅助注射成型产品的CAE模拟研究

通过建立具有代表性的平板类气体辅助注射成型产品模型,借助注塑成型CAE软件Moldflow对该模型进行了一系列分析模拟。通过对模拟结果数据的综合分析和数学处理,得到了气体注射参数对气道穿透长度的影响规律、气体注射参数设置及气道穿透长度预测公式。     

Phase diagram sample preparation

The procedures by which samples are prepared for phase diagram studies are examined and critically evaluated. The three key elements that require attention (alloy purity, homogeneity, and equilibrium) are separately addressed, and several examples of bad procedure are presented with information on their past and future consequences. The origin of commonly confronted problems are described and special procedures are suggested for their circumvention. Additionally, new methods for the early detection of some sample problems are presented, and the usefulness of rapidly solidified materials (as specimens) in phase diagram studies is illustrated.     

基于单片机测试系统对凿削磨损的动态测量和分析

介绍了单颗粒凿削磨损测试系统的原理、结构、测试方法以及在镁合金表面电弧喷涂锌铝合金的表面质量的检测中的应用.试验通过对试样划痕形貌尺寸数据的测量和对单片机力学信号的采集来进行计算,从而来绘制多条比能耗对应磨损体积的关系曲线,从对凿削磨损的开始到结束的整个磨损过程的动态分析,为磨损机理研究提供更多的细节,通过测试数据的处理,继而确定获得具有最佳耐磨性能的喷涂工艺参数.     

An ab initio study of Ti-Y-O nanocluster energetics in nanostructured ferritic alloys

So-called oxide dispersion strengthened steels or nanostructured ferritic alloys (NFAs) contain nanoprecipitates which give them exceptional mechanical properties and resistance to radiation effects. However, the structure and composition of these nanoprecipitates are still uncertain. To help clarify the nature of the smallest nanoprecipitates, density functional theory calculations are used to investigate the most stable Ti, Y, and O nanocluster computational units in Fe. Two distinct methods for searching for stable nanoclusters are proposed: one in which nanoclusters are restricted to the body-centered cubic Fe lattice and one in which the nanocluster structures are strained variants of bulk Ti and Y oxides. We discovered that nanoclusters that are structurally similar to bulk Ti and Y oxides are significantly more stable than nanoclusters that are restricted to the Fe lattice. Consequently, the most stable nanoprecipitates in Ti-Y-O NFAs are more likely to be small oxide phases than coherent solute-enriched clusters.     

“我国古代大型铸铜文物”系列文章之十三：古代大铜锅和大铜缸（待续）

叙述了古代大铜锅和大铜缸的有关情况。在现存的26口古代大铜锅中,重点介绍了其中6口大铜锅的尺寸、铸造年代、功用、特点和存放地。而现存的165口古代大铜缸,都是明、清两代铸造的,绝大多数都存于北京故宫,本文较详细地介绍了其中5口大铜缸的有关情况。     

筒形件强力旋压变形机理的有限元分析

本文通过建立筒形件强力旋压的力学模型,运用三维弹塑性有限元对强力旋压过程进行了计算,得到了旋压过程的应力场和应变场分布。在此基础上,对筒形件强力旋压的变形机理进行了分析,并将计算结果与实测结果进行了比较,两者吻合较好