工艺参数对压铸AM60B合金力学性能的影响

采用液态压铸技术，在适宜的工艺参数下，压铸AM60B合金的力学性能达到σ=223MPa、δ5=10．5％和HBS59。除化学成分外，微观组织和合金相的取向都受工艺技术条件的显著影响，适宜的工艺参数将得到好的微观组织和合金相取向，从而提高合金的力学性能。本文是在冷室压铸条件下，系统地研究了压铸工艺参数对AM60B合金组织和力学性能的影响。     

铁、镁含量及热处理对压铸铝硅合金组织和拉伸性能的影响

采用普通压铸和真空压铸工艺制备了铁和镁含量不同的铝硅合金,并对它们进行固溶和时效热处理,研究了铁、镁含量对普通压铸合金组织和拉伸性能的影响,以及热处理对真空压铸合金拉伸性能及断口形貌的影响。结果表明:当铝硅合金中镁的质量分数为0.55%时,铁的质量分数不能超过0.60%,否则过量的铁易生成针片状Al9Fe2Si2相,该相会恶化合金的拉伸性能;镁元素的添加能使针片状Al9Fe2Si2相转变为Al8Mg3FeSi6相,在一定程度上消除铁元素的有害影响,提高合金的拉伸性能;辅以真空条件可使压铸合金的抗拉强度提高12%,热处理可使真空压铸合金的抗拉强度提高26.17%。     

新型高强耐磨锌基合金ZnAl27Cu2压铸特性探讨

用性能优良的压铸机,对ZnAl27Cu2合金压铸特性进行了研究。重点探讨了机器的增压阶段对该合金的影响。结果表明:充分发挥机器的增压效果,可以进一步改善和提高该合金的性能。试验还表明ZnAl27Cu2合金可以用冷室压铸方法成功生产各种大小、不同复杂程度的铸件。由于该种合金具有一系列优良的特性,将会成为压铸行业中的主要合金之一。     

压铸技术及压铸合金的发展与应用

简述了压铸发展的历史及压铸技术的发展状况。叙述了压铸铝合金、镁合金、锌和锌铝合金的研究开发与应用状况,分析了压铸合金有待进一步研究开发的问题     

压铸技术在汽车零部件生产中的应用

一、压铸技术的发展 压铸至今仅有100多年的历史,最初用于制造枪弹、活字等。在19世纪初,由于印刷业的蓬勃发展,1805年,美国研制出了世界上第一台铸字机,随着压铸行业的发展和所涉及的领域的扩大,压铸机和压铸合金也得到了发展。到第二次世界大战之前,热室压铸机和气压立式冷室压铸机已经研制出来,并在欧洲各国得到了广泛的应用。二次世界大战之后,逐步形成了压铸锌、铝、镁和铜等合金的标准、设备。     

浅谈压铸模具浇道设计

压铸模设计首先要了解金属熔体在压射过程中的相变过程，掌握压铸合金充填的流动规律；合理设计浇注系统是压铸模设计的关键。     

Cu,Fe,Mn对压铸AlSi9Cu3性能影响

本文通过对压铸ＡｌＳｉ９Ｃｕ３中合金元素Ｃｕ,Ｆｅ,Ｍｎ正交试验,研究了Ｃｕ,Ｆｅ,Ｍｎ合金元素对压铸铝合金ＡｌＳｉ９Ｃｕ３的力学性能影响。     

压铸铝硅合金中气孔形成及影响

本文对压铸铝硅合金中气孔的形成与压铸工艺、结晶时间和冷却速度、氢含量、合金成分、变质剂和除气方法等之间的关系进行总结，并同时分析各影响因素对气孔的作用机理。     

压铸铝硅合金中气孔形成及影响

本文对压铸铝硅合金中气孔的形成与压铸工艺、结晶时间和冷却速度、氢含量、合金成分、变质剂和除气方法等之间的关系进行总结，并同时分析各影响因素对气孔的作用机理。     

压铸锌合金的组织、生长过程与老化问题

本文就Zn-Al-Cu三元合金富锌部分各组织的情况进行探讨,研究合金组织的生长过程,提出改善压铸锌合金的可行途径。     

我国铸造覆膜砂的生产、应用与展望

论述了我国铸造覆膜砂的生产及应用情况。简要介绍了我国覆膜砂的发展历程、特点、原材料的选择、混制工艺及分类 ,着重介绍了覆膜砂的制芯 (造型 )工艺 ,特别是热芯盒制芯及壳芯制作工艺 ,覆膜砂生产铸件常见缺陷及解决措施以及覆膜砂的再生与质量控制等。展望了我国覆膜砂技术的发展方向及应用前景     

A system for design of multicavity die casting dies from part product model

Design of a die casting die is a nontrivial task, which depends upon a number of influencing factors related to material, part geometry, manufacturing resources, cost, delivery time, etc. Complexity of this die design activity further increases in case of a multicavity die. Currently available die design systems lack in the level of automation and do not explicitly address multicavity die design. Present work is an attempt to develop a system, which facilitates computer-aided design of a multicavity die casting die. The objective of the proposed system is to automate the process of deciding number of cavities, design of cavity layout and die–base, and core and cavity creation for a multicavity die casting die. The proposed system, which we named Auto_Die_Caster, works as an add-on application to solid modeling software SolidWorks. The proposed system is divided into four modules, namely data initialization, cavity design, cavity layout and die–base design, and core–cavity design. Use of commercial software like SolidWorks as a platform both for part design and generation of die design eliminates loss of data which makes the proposed system quite useful in the industrial scenario. To demonstrate the capabilities of Auto_Die_Caster, it was tried for a number of die casting parts and the results are presented. Proposed system is a step forward to design manufacturing integration for die casting process.     

模具材料计算机辅助选择系统的开发

采用结构化程序和规范化数据库技术开发了模具材料计算机辅助选择系统。该系统由初始信息输入模块、材料推荐检索模块、数据库管理等模块组成。系统的数据库分为6个规则库和1个实例库,规则库是规则推理的基础,实例库存放模具材料的技术参数。系统采用规则推理方法进行推理,提出了合理的模具选材建议。     

提高压铸模具寿命的途径研究

从压铸件的结构和压铸模具的设计、成形零件材料的选用、模具零件的加工与装配工艺、材料的热处理及压铸工艺参数的选用等方面,研究并指出了提高压铸模使用寿命的有效途径,对压铸模的设计与制造有一定的参考价值.     

基于模糊控制的挤压铸造模温控制系统研究

针对挤压铸造模具温度难于控制的特性,分析了挤压铸造工艺及挤铸模具温度影响因素。根据现有挤铸模具加热及冷却方式,结合分析研究影响挤铸模温的多因素与多变性,建立了新的挤铸模具温度控制模型,并运用模糊控制方法来实现温度控制。在设计好模糊控制器后,利用Matlab软件中的Simulink模块建立了模温控制系统模型并实现了仿真分析。仿真结果表明:与传统的PID控制相比,模糊控制系统具有良好的控制特性。     

轴类件的二氧化碳激光熔铸技术

对轴类件激光熔铸技术进行系统的阐述，文中对工艺参数的选择、熔铸材料的技术要求、给料及驱动系统对熔铸件的影响提供较多的依据。     

A study on reheating characteristics for thixo die casting process with electromagnetic stirring and extruded aluminum alloys and their mechanical properties

In this paper, the reheating process and mechanical properties of thixo die cast A356 alloy, using electromagnetic stirring (EMS) and extrusion before thixo die casting, were discussed. The EMS is used mainly to manufacture raw materials with a globular microstructure. If relevant reheating is carried out, products with excellent mechanical properties can be manufactured by EMS. Contrarily, extruded material has a fine dendrite microstructure and has rarely been assumed to be suitable for the thixo die casting process. This study demonstrated that the microstructure of extruded material could be globularized and applied to the thixo die casting process only with the relevant reheating parameters. This applicability was estimated through image analysis obtaining the solid fraction, the mean equivalent diameter, and roundness under various reheating conditions. After thixo die casting experiments using three materials, which were EMS, low-extrusion material (LER), and high-extrusion ratio materials (HER), mechanical properties were comparatively analyzed. EMS and HER materials show better mechanical properties than LER.     

Development of a die design system for die casting

This paper presents a research work of a computer-aided die design system for die casting. The proposed system consists of seven distinct modules. Through these modules, the die designers are able to create a die casting die from a product part model. It is a user-friendly system that allows both experienced and novice die designers to easily accomplish the task of die design.The practical goal of this research is twofold: (1) to develop a system that integrates the different stages of die design process and (2) that at the same time facilitates the editing of die casting design during or after the course of the design process. The approach undertaken in this research includes (1) feature-based and constraint-based modelling, (2) parametric design and (3) a geometric and topological information extraction technique from a B-rep model. A prototype system has been developed using this approach and the system is able to aid the automation of the die casting die design process, thus improving the efficiency and quality of, and reducing the cost of die design for die casting.     

压铸单元能效在线监测方法及监测系统

针对压铸单元能效复杂多变、难以实时有效监测的难题,通过对压铸单元能耗的构成进行分析建立了在线监测指标体系,提出了基于功率信息进行数据分析的在线监测方法。该方法通过小波变换对实时测量的压铸单元功率信息进行分析,利用极值查找法在线识别了设备的运行状态和加工件数,从而获得压铸单元的能效信息。基于C#语言开发了压铸单元能效在线监测系统。通过实验验证了所提方法和监测系统的有效性和实用性。     

压力铸造中模具脱模剂和防粘蜡的选择分析实验

压力铸造中模具脱模剂和防粘蜡种类繁多,如何正确选择对于铸件外观品质和模具寿命有着重要的影响。采用H13试样,在不同的涂敷工艺下,对于脱模剂和防粘蜡的成膜性和涂敷厚度进行实验考察,并且利用扫描电镜观察涂敷防粘蜡后的试样浸入铝液中的时间对其显微组织影响。实验和分析表明,防粘蜡皮膜性能在模具温度为300℃左右时涂敷,并保温2~5m in为最好。