连续铸挤技术研究现状及发展

连续铸挤技术(CASTEX)是在金属连续挤压技术(CONFORM)上进一步发展的金属成型技术。介绍了连续铸挤技术的发展历史、基本原理、工艺特点和连续铸挤装备的结构,并分析了连续铸挤过程中不同工艺参数对制品性能的影响。重点介绍了连续铸挤现阶段在实际生产中的应用,并对连续铸挤技术的发展方向做了进一步的分析。     

CASTEX扩展挤压的试验研究

连续铸挤（CASTEX）是一种先进的挤压工艺，可以将液态铝及铝合金直接挤压成型，省去了熔炼后的铸锭、铸锭再加热等工序，极大的节省了能源，而且由于变形温度较高，变形抗力较少，进一步降低了能耗，是一种短流程、低能耗的先进加工工艺。首次探讨了利用连续铸挤技术生产大尺寸型材的方法，进一步拓展了连续铸挤工艺的应用范围。     

连续铸挤生产铝管的研究

连续铸挤是一种先进的生产工艺,可以使液态金属直接连续成形,具有能耗低,废料少,生产效率高,产品质量好,设备投资少等许多常规挤压方法不具备的优点,但连续铸挤生产铝管要材处于试验阶段,仍有很多问题要解决。在大量试验的基础上,生产出了具有较好质量的１０６０（Ｌ２）管材,并探讨了连续铸挤法生产铝管材的工艺。     

连铸连挤工艺及其设备的新探索

本文根据国外铸挤机的工艺反设备技术,论证了有关铸挤机的新工艺,新结构的探索,目的在于促进我国挤压行业的兴旺发展和新技术的开发。铸挤机是世界冶金界的一项最新的科学技术,目前只有英、美、日等三国掌握,并能设计制造铸挤设备。铸挤机以液态金属、粉粒状和切屑为原料,可以挤出管、棒、型、线、带材,具有许多优点和很好的经济效益。它的发明及设备的开发,是有色金属挤压工艺的一大突破。     

铝材连续铸挤动态凝固过程有限元分析

利用有限元法研究了连续铸挤工艺中液态金属的动态凝固过程 ，数值计算和实测结果表明，摩擦热和变形热对铝材连续铸挤凝固区的温度场有较大影响，采用等价比热法处理凝固潜热问题是切实可行的，通过速度场与温度场的耦合计算，得到了凝固区的温度场分布情况。     

CASTEX连续铸挤设备的开发研究

对ＣＡＳＴＥＸ连续铸挤设备的结构优化和工艺参数优化进行了开发研究。分析了连续铸挤过程诸影响因素的作用及其相互关系，并结合实际生产对连续铸挤技术的工业推广前景和经济效益进行了评述     

CASTEX连续铸挤设备的开发研究

对ＣＡＳＴＥＸ连续铸挤设备的结构优化和工艺参数优化进行了开发研究。分析了连续铸挤过程诸影响因素的作用及其相互关系，并结合实际生产对连续铸挤技术的工业推广前景和经济效益进行了评述。     

液态连续挤轧机

液态连续挤轧机是一种用于生产金属及合金的板、线、型、棒、管材制品及坯料的液态连续挤轧设备,本发明集液态金属的挤压和铸轧成型于一体,主要包括基体金属与添加料按比例送料、挤压、搅拌、冷却,形成半固态金属后挤压至铸轧机进行成型铸轧,最大优点是:设备重量轻,所需动力小;制品的化学成分分布均匀,晶粒均细,气针     

铝包钢丝的加工工艺

主要从金属复合角度介绍了铝包钢丝加工工艺的发展概况，分析了各种工艺的原理；着重介绍了Ｃａｓｔｅｘ连续铸挤工艺生产铝包钢丝的优越性，并指出了铝钢复合中需要解决的几个关键问题。     

液态金属挤压铸挂成形机理探讨

研究了液态金属挤压铸挂成形的概念和双金属挤压铸挂成形工艺过程,在45号钢坯上铸挂铅锡青铜并观察了试样的挤压铸挂成形效果.结果表明,液态金属挤压铸挂成形是利用铸造与挤压相结合的铸挂工艺,铸挂熔(结)合面在凝固和少量塑性变形的综合作用下实现了较好的凝固贴合与机械嵌合,使一种金属以一定的厚度牢固均匀地涂覆在另一种金属上;分析了液态金属挤压铸挂成形过程与重力铸挂成形过程相比所具有的特点.     

CASTEX FORCE OF AS WIRE IN BONDING ZONE

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Simulation of parallel kinematic machine tools with minimal effort

New innovative machine tool concepts like parallel kinematics require the development process to be continuously supported by simulation. Otherwise it will be impossible to exploit their full potential due to the complexity of the kinematic and dynamic behavior. Nevertheless, machine tool manufacturers often refrain from employing simulation tools because of the high effort and expenses expected for the introduction of this technology. It is against this backdrop that the paper presents a method to support the development process of parallel kinematic machine tools with a minimum of effort. An analysis of the development process identifies the machine characteristics that have to be determined for each stage. A simulation method is developed based on these results and on the requirements for a seamless integration of the simulation techniques into the different stages of the process. It is implemented and tested by the example of a parallel kinematic machine tool that has already been successfully introduced in industry.     

Refill Friction Stir Spot Welding of Similar and Dissimilar Alloys:A Review

Refi ll friction stir spot welding, also known as friction spot welding(FSpW), is a solid-state welding process suitable for spot joining of lightweight materials. Through the eff orts of improving joint quality for similar and dissimilar materials, for example, aluminum and magnesium, this joining technology is well developed. The joining mechanism and process characteristics of FSpW have been widely studied. However, the application of FSpW in industry has not been entirely successful. In this review article, the research of similar and dissimilar material joints, such as, Al/Cu, Al/Ti, Al/Mg and Al/Steel, is summarized. The microstructural features and mechanical properties of the joints, welding tool and the application development are discussed in detail.     

SiCp/Al复合材料低损伤加工技术研究进展

SiC_p/Al复合材料具有优异的性能,在尖端的空天装备中应用广泛,但由于其组成相碳化硅颗粒和铝合金之间存在的巨大性能差异,使得加工过程中极易出现加工损伤,严重影响SiC_p/Al复合材料产品的精度和使役性能,制约着SiC_p/Al复合材料的工程化应用。本文围绕SiC_p/Al复合材料低损伤加工技术,从加工损伤的形成机理、加工损伤的影响因素、低损伤加工工具和加工工艺3个方面对国内外相关的研究进展进行分析,总结目前针对SiC_p/Al复合材料低损伤加工技术研究现状和不足之处,并指出发展趋势和方向。     

Development of a Novel Modular and Agile Face Machining Technology

A novel face machining technology has been achieved by combining milling and grinding into one operation. The system's ability to control these distinct metal removal processes independently provides a high degree of process agility in terms of metal removal rate, surface finish and part flatness. A physics based model of the combined process has been developed to aid process development. It provides force and deflection values resulting from the unique excitation of milling and grinding together with the dynamics of the machine, fixture and part. The simulations are presently being validated using a prototype machine based on this machining technology.     

压铸工艺对压铸件质量影响的研究现状及发展

压铸技术经过一个半世纪的发展,已经成为铸造行业的重要分支之一。虽然压铸有着生产效率高等诸多优点,但压铸件的气孔、缩孔和裂纹等缺陷一直未能得到很好的解决。压铸工艺是将压铸机、压铸合金和压铸模具等三大要素进行有机结合和综合应用的过程,对压铸生产有着重要影响。本文以文献调研为主,探讨了在压铸生产过程中,压铸工艺参数和压铸生产效率、压铸件质量以及模具质量之间的关系,并对我国压铸产业未来发展方向和面临的问题进行了分析。     

微铣加工关键技术研究现状与发展

微铣削加工技术在精密三维微小零件制造中的应用,引发了微细制造领域的重大技术变革,其区别于MEMS技术和超精密加工技术,是利用传统铣削加工方式并针对微米和中间尺度微小零件进行高效率、高精度微细制造的有效途径,具有加工材料的多样性和能实现三维曲面加工的独特优势.论文通过综合国内外大量文献,对微铣床设备研发、微铣削表面形貌、表面粗糙度与微毛刺及微铣刀具磨损等进行讨论,指出微铣削加工相关技术研究存在的不足并对该领域的发展提出自己的观点.     

Structured Method for Identifying Success Factors in New Product Development of Machine Tools

New product development of machine tools is always costly and risky for machine tools manufacturers; nevertheless, there have been few academic studies on the product development process of machine tools. Successful product developments were found to be related to perceived superior skills and resources within the objective of machine tools manufacturers. In this study, in order to establish the product development methodology for machine tools, the success factors in new product development have been identified based on the results of the interview and questionnaire investigations with experienced engineers in Japanese machine tools manufacturers. Based on the findings of this study, a structured method for identifying the success factors in new product development has been proposed.     

Status quo and development trend of lost foam casting technology

Lost foam casting（LFC）technology has been widely applied to cast iron and cast steel.However,the development of LFC for Al and Mg alloys was relatively slower than that for cast iron and cast steel.The application of LFC to Al and Mg alloys needs more effort,especially in China.In this paper,the development history of LFC is reviewed,and the application situations of LFC to Al and Mg alloys are mainly discussed.Meanwhile,the key problems of LFC for Al and Mg alloys are also pointed out.Finally,the prospects for LFC technology are discussed,and some special new LFC technologies are introduced for casting Al and Mg alloys.In future,the development trends of green LFC technology mainly focus on the special new LFC methods,metal material,coating,heat treatment,new foam materials as well as purification technology of tail gas,etc.     

基于MBD的全三维工艺技术在机床行业的应用

针对目前机床行业机床产品中高精度,异形复杂腔体类零件加工工艺复杂,以及后续车间装配工人识图不直观问题,提出了在机床行业应用全三维工艺。阐述了全三维工艺在机床制造过程中应用流程。详细阐述三维可视轻量化模型生成,设计工艺信息分类关联存储,三维工艺规程卡制作以及可视化终端查看关键技术,最后给出了应用实例。