Die ＆ Mould 2006德国OPS和Tebis举办研讨会

2006年Die ＆ Mould展会期间，德国OPS—Ingersoll和德国Tebis软件共同主办了关于高速加工在模具行业应用的研讨会。其中，德国OPS-Ingersoll作为世界高速加工和EDM的领导者，介绍了最新的高速加工和EDM技术、将来发展趋势以及两种技术的结合和模具制造自动化技术。德国Tebis软件公司介绍了如何在多系统环境下实现更快更好的加工流程，所用实例为德国大众高尔夫轮辐加工的实际流程。讲座中也介绍了Tebis的新模块：快速曲面造型RSC。两个小时的研讨会前后吸引了近100名专业听众。

DMG公司机床亮相Die ＆ Mould骄人业绩令世人瞩目

为期1周的第11届中国国际模具技术和设备展览会（Die ＆ Mould China 2006）在上海浦东新国际博览中心圆满结束，来自世界各地约12万观众参观了面积近5万m^2的展会。

Die ＆ Mould 2008隆重召开

2008年5月12日,亚洲规模最大、全球第二的“第12届中国国际模具技术和设备展览会”（Die ＆ Mould 2008）在上海新国际博览中心拉开帷幕,来自全球17个国家和地区的约1400家公司积极参与此次盛会。

Canton Die ＆ Mould 2009第十届中国（广州）国际模具暨制造技术展明年6月开幕

由中国贸易促进委员会机械行业分会、广东省机械行业协会、广东省模具工业协会和广州市模具工业协会主办的第十届中国（广州）国际模具暨制造技术展将于2009年6月16日至19日在中国进出口商品交易会琶洲展馆盛大举行。本届展会还得到了日本金型工业协会、韩国金型工业协同组合、英国制造技术协会、意大利对外贸易委员会、大韩贸易投资振兴公社、日本贸易振兴机构、新加坡制造商联合会、印度工业联合会等海外相关协会的大力支持。

精密加工成就先进制造，国际模展助力产业提升——第十三届中国国际模具技术和设备展览会招展招商工作紧锣密鼓展开DIE ＆ MOULD CHINA 2010（简称“DMC2010”）

由中国模具工业协会和上海市国际展览有限公司联合主办的“中国国际模具技术和设备展览会”（中国国际模展）每逢双年在上海举办，迄今已有24年的历史。随着展会规模和影响力不断扩大，其权威性和专业性得到业内公认，已经成为海内外知名的专业展览之一。

“三创五育”背景下“双一流”高校本科人才培养的DIE模式初探及评价

针对新时代背景下“双一流”高校人才培养的发展需求,在“三创五育”理念指导下,解析基于产学研合作理论引入的DIE模式的内涵,系统阐述了DIE理念贯彻下的教学系统设计并付诸实践,旨在打破教学系、研究所、企业之间的壁垒,为学生学习、实践提供更多样化的渠道。问卷调查结果表明DIE模式在本科生团队协作、学术创造、自信心树立等方面有切实作用,为培养全面发展的高素质本科人才提供了参考。

Thin-walled and large-sized magnesium alloy die castings for passenger car cockpit:Application,materials,and manufacture

In order to effectively reduce energy consumption and increase range mile,new energy vehicles represented by Tesla have greatly aroused the application of integrated magnesium(Mg)alloy die casting technology in automobiles.Previously,the application of Mg alloys in automobiles,especially in automotive cockpit components,is quite extensive,while it has almost disappeared for a period of time due to its relatively high cost,causing a certain degree of information loss in the application technology of Mg alloy parts in automobiles.The rapid development of automotive technology has led to a higher requirement for the automotive components compared with those traditional one.Therefore,whatever the components themselves,or the Mg alloy materials and die casting process have to face an increasing challenge,needing to be upgraded.In addition,owing to its high integration characteristics,the application of Mg alloy die casting technology in large-sized and thin-walled automotive parts has inherent advantages and needs to be expanded urgently.Indeed,it necessitates exploring advance Mg alloys and new product structures and optimizing die casting processes.This article summarizes and analyzes the development status of thin-walled and large-sized die casting Mg alloy parts in passenger car cockpit and corresponding material selection methods,die casting processes as well as mold design techniques.Furthermore,this work will aid researchers in establishing a comprehensive understanding of the manufacture of thin-walled and large-sized die casting Mg alloy parts in automobile cockpit.It will also assist them in developing new Mg alloys with improved comprehensive performance and new processes to meet the high requirements for die casting automotive components.

Compression properties of cost-efficient porous expanded clay reinforced AA7075 syntactic foams fabricated by industrial-oriented die casting technology

In today’s manufacturing industries,hard competition between rival firms makes it compulsory for researchers to design lighter and cheaper machine components due to the megatrends of cost-effectiveness and anti-pollution.At this point,aluminum syntactic foams(ASFs)are new-generation engineering composites and come into the upfront as a problem-solver.Owing to their features like low density,sufficient elongation,and perfect energy absorption ability,these advanced foams have been considerably seductive for many industrial sectors nowadays.In this study,an industrial-oriented automatic die casting technology was used for the first time to manufacture the combination of AA7075/porous expanded clay(PEC).Micro evaluations(optical and FESEM)reveal that there is a homogenous particle distribution in the foam samples,and inspections are compatible with the other ASF studies.Additionally,T6 aging heat treatment was operated on one half of the produced foams to explore the probable impact of aging on the compressive responses.Attained results show that PEC particles can be an alternative to expensive hollow spheres used in the previous works.Besides,a favorable relationship is ascertained between the aging treatment and mechanical properties such as compression strength and plateau strength.

Effect of slow shot speed on externally solidified crystal,porosity and tensile property in a newly developed high-pressure die-cast Al-Si alloy

The effect of slow shot speed on externally solidified crystal(ESC),porosity and tensile property in a newly developed high-pressure die-cast Al-Si alloy was investigated by optical microscopy(OM),scanning electron microscopy(SEM)and laboratory computed tomography(CT).Results showed that the newly developed AlSi9MnMoV alloy exhibited improved mechanical properties when compared to the AlSi10MnMg alloy.The AlSi9MnMoV alloy,which was designed with trace multicomponent additions,displays a notable grain refining effect in comparison to the AlSi10MnMg alloy.Refining elements Ti,Zr,V,Nb,B promote heterogeneous nucleation and reduce the grain size of primaryα-Al.At a lower slow shot speed,the large ESCs are easier to form and gather,developing into the dendrite net and net-shrinkage.With an increase in slow shot speed,the size and number of ESCs and porosities significantly reduce.In addition,the distribution of ESCs is more dispersed and the net-shrinkage disappears.The tensile property is greatly improved by adopting a higher slow shot speed.The ultimate tensile strength is enhanced from 260.31 MPa to 290.31 MPa(increased by 11.52%),and the elongation is enhanced from 3.72%to 6.34%(increased by 70.52%).

Characteristics and distribution of microstructures in high pressure die cast alloys with X-ray microtomography:A review

Al and Mg alloy high pressure die castings(HPDC)are increasingly used in automotive industries.The microstructures in the castings have decisive effect on the casting mechanical properties,in which the microstructure characteristics are fundamental for the investigation of the microstructure-property relation.During the past decade,the microstructure characteristics of HPDC Al and Mg alloys,especially micro-pores andα-Fe,have been investigated from two-dimensional(2D)to threedimensional with X-ray micro-computed tomography(μ-CT).This paper provides an overview of the current understanding regarding the 3D characteristics and formation mechanisms of microstructures in HPDC alloys,their spatial distributions,and the impact on mechanical properties.Additionally,it outlines future research directions for the formation and control of heterogeneous microstructures in HPDC alloys.

语义构建中的认知识解因素——以die of X和die from X为个案

语义构建离不开认知识解因素。die of和die from可以与同样的表达式搭配,即die of X和die from X。就规约意义而言,die of X通常表达客观的、直接的原因,而die from X通常表达客观的、间接的原因。但在die of X和die from X语义构建过程中,通过认知识解,客观的、直接的原因会被识解为主观的、间接原因,客观的、间接的原因会被构建为主观的、直接的原因。

一种面向IO Die的敏捷验证方法

IO Die可以用做IO扩展芯片,也可作为芯粒(chiplet)复用于多个项目。提出一种面向IO Die的敏捷验证方法,验证平台包括子系统级、簇级、全片级3个层次,可实现测试激励的跨层次复用;针对各验证层次的测试激励的自动生成方式进行优化,分别采用覆盖率驱动、可配置约束产生、多目标优化策略,提高测试激励的生成效率。实验结果表明,该方法在保证效率和可靠性的前提下,可以降低验证成本,缩短验证时间,快速获得已知合格裸片KGD。

Heat Treat ment of Die and Mould Oriented Concurrent Design

Many disadvantages exist in the traditional die design method which belongs to serial pattern. It is well known that heat treatment is highly important to the dies. A new idea of concurrent design for heat treatment process of die and mould was developed in order to overcome the existent shortcomings of heat treatment process. Heat treatment CAD/CAE was integrated with concurrent circumstance and the relevant model was built. These investigations can remarkably improve efficiency, reduce cost and ensure quality of R and D for products.

Mould filling ability and microstructure of aluminum alloy under electromagnetic die casting

In order to solve the mould filling problem of large thin walled aluminum alloy castings effectively, a new casting technology called electromagnetic die casting has been developed. Emphasis has laid on studying the mould filling ability and microstructure under the mentioned method. The results show that the mould filling ability of A357 is increasing continually with the increasing of the input voltage, that is, the magnetic induction intensity. The pressure head of the molten metal increases from the lowest one at the input of the mould to the highest one at the end of the mould while in a conventional mould the pressure head depends invariably on the sprue height. Under electromagnetic die casting, the grains of A357 alloy are refined, and the pattern of eutectic silicon of alloy changes from rough plate to smooth strip.

DIE&MOULD CHINA2002精品荟萃

我国模具制造业的快速发展使得我国模具市场成为国内外著名模具制造商和模具加工设备制造商眼中的一块肥肉 ,也促使了中国国际模具技术和设备展览会规模一届比一届大 ,水平一届比一届高。今年 5月 10～ 14日在上海新国际博览中心举办的第 9届中国国际模具技术和设备展览会在参展单位、展出规模、展商和展品档次等各个方面都是历届模展中最大和最高的一次。文章根据记者在DIE&MOULDCHINA 2 0 0 2上的所见所闻 ,从众多的展品中挑选出一些水平高、代表性强的加工机床及相关设备加以介绍 。

Numerical simulation on rheo-diecasting mould filling of semi-solid key-shaped component

Based on the experimental data of apparent viscosity about semi-solid A356 aluminum alloy, the apparent viscosity model was developed and inserted into a commercial software Castsoft6.0, and a key-shaped component filling process was simulated. The simulation results are in good agreement with the experimental filling results, which indicates that the apparent viscosity model established is effective and available. The process parameters on the cavity filling of the key-shaped components have been optimized. The injection pressure should be more than 15 MPa, the slurry flowing velocity in the in-gate should be more than 1.73 m/s, and the slurry temperature should be over 585 ℃.

Henry入路蝶形钢板内固定治疗桡骨远端双柱Die-punch骨折

目的:探讨Henry入路蝶形钢板切开复位内固定治疗桡骨远端双柱Die-punch骨折的临床疗效。方法:选择2018年1月至2021年6月采用Henry手术入路切开复位内固定治疗的26例桡骨远端双柱Die-punch骨折患者,男14例,女12例;年龄20~75(44.2±3.4)岁。观察术后并发症情况,术后12个月采用Gartland-Werley评分标准进行腕关节功能评价。结果:26例患者均获得随访,时间10~18(13.4±0.8)个月。所有骨折均获得骨性愈合,时间8.5~15.8(11.4±0.5)周。所有患者手术切口都Ⅰ期愈合,无伤口感染、血管神经损伤及内固定失效等病例。术后12个月GarthndWerley评分(3.65±0.36)分,优16例,良8例,可2例。结论:通过掌侧Henry入路,使用蝶形钢板切开复位内固定治疗桡骨远端双柱Die-punch骨折,可获得满意的临床疗效。

An Improved Elite Slime Mould Algorithm for Engineering Design

The Swarm intelligence algorithm is a very prevalent field in which some scholars have made outstanding achievements.As a representative,Slime mould algorithm(SMA)is widely used because of its superior initial performance.Therefore,this paper focuses on the improvement of the SMA and the mitigation of its stagnation problems.For this aim,the structure of SMA is adjusted to develop the efficiency of the original method.As a stochastic optimizer,SMA mainly stimulates the behavior of slime mold in nature.For the harmony of the exploration and exploitation of SMA,the paper proposed an enhanced algorithm of SMA called ECSMA,in which two mechanisms are embedded into the structure:elite strategy,and chaotic stochastic strategy.The details of the original SMA and the two introduced strategies are given in this paper.Then,the advantages of the improved SMA through mechanism comparison,balance-diversity analysis,and contrasts with other counterparts are validated.The experimental results demonstrate that both mechanisms have a significant enhancing effect on SMA.Also,SMA is applied to four structural design issues of the welded beam design problem,PV design problem,I-beam design problem,and cantilever beam design problem with excellent results.

Effects of magnesium and copper additions on tensile properties of Al-Si-Cr die casting alloy under as-cast and T5 conditions

Aluminum high pressure die casting(HPDC)technology has evolved in the past decades,enabling stronger and larger one-piece casting with significant part consolidation.It also offers a higher design freedom for more mass-efficient thin-walled body structures.For body structures that require excellent ductility and fracture toughness to be joined with steel sheet via self-piercing riveting(for instance,shock towers and hinge pillars,etc.),a costly T7 heat treatment comprising a solution heat treatment at elevated temperatures(450℃-500℃)followed by an over-ageing heat treatment is needed to optimize microstructure for meeting product requirement.To enable cost-efficient mass production of HPDC body structures,it is important to eliminate the expensive T7 heat treatment without sacrificing mechanical properties.Optimizing die cast alloy chemistry is a potential solution to improve fracture toughness and ductility of the HPDC components.The present study intends to tailor the Mg and Cu additions for a new Al-Si-Cr type die casting alloy(registered as A379 with The Aluminum Association,USA)to achieve the desired tensile properties without using T7 heat treatment.It was found that Cu addition should be avoided,as it is not effective in enhancing strength while degrades tensile ductility.Mg addition is very effective in improving strength and has minor impact on tensile ductility.The investigated Al-Si-Cr alloy with a nominal composition of Al-8.5wt.%Si-0.3wt.%Cr-0.2wt.%Fe shows comparable tensile properties with the T7 treated AlSi10MnMg alloy which is currently used for manufacturing shock towers and hinge pillars.