康明斯6BT排气歧管铸件的生产技术

从造型、熔炼及热处理等方面介绍了康明斯6BT排气歧管铸件的主要生产工艺，并提出了铸造缺陷的解决措施。     

Vacuum casting replication of micro-riblets on shark skin for drag-reducing applications

A vacuum casting method to replicate shark skin surface accurately in large area was investigated to overcome some difficulties in the replication process. The fresh shark skin was pretreated as a replication sample, and the replication mold of shark skin was manufactured by casting the unsaturated polyester resin under vacuum and laying the multilayer glass fibers. Under vacuum condition, silicone rubber was poured into the resin mold to obtain the replication film of the shark skin with micro-riblets. The contour of the micro-riblet was measured by a Talysurf CLI2000 machine to evaluate the replication accuracy. Based on the contacting angle measurement, the hydrophobic property of the micro-riblet's surface was investigated. It was found that the vacuum casting method was an effective replication technology which was suitable to form large-area and highly accurate micro-riblets on the surface of the shark skin. The experiment of drag reduction was conducted in a water tank. Based on the experimental results, the replicated film of shark skin played a significant role in reducing drag. The maximum and minimum of drag reduction rate were 18.6% and 9.7%, respectively.     

进气管铸件消失模振动造型过程中模样的变形

研究了６１０５柴油机进气管模样在振动造型中的变形及其影响因素，得到了铸件尺寸变化的大致规律和合适的振动造型工艺     

铸造工艺CAD/CAE在进气管设计中的应用

将铸造工艺CAD／CAE系统应用到汽车进气管零件的设计中，能够较完整地完成三维实体造型到最后生成模具的全过程。在UG造型软件基础上开发了铸造工艺CAD系统，包括工艺参数设计、置口设计和浇注系统设计等模块。在CAE系统中，对铸件进行流场和温度场的模拟，以便校核和优化工艺设计。     

跨平台熔模铸造工艺工装CAD

开发了跨平台的熔模铸造工艺工装CAD软件系统。该系统功能全面,能进行零件结构工艺性分析,确定工艺参数,设计浇注系统,辅助设计压型,查询相关资料,为实现其跨平台性,软件系统采用JAVA语言进行程序设计,系统采用模块化结构,界面友好,使用,维护方便。     

离心铸造碳钢-高铬铸铁双金属复合管工艺初探

介绍了采用双液复合离心铸造工艺浇铸以碳钢为外套、高铬铸铁为内套的双金属套筒的工艺试验情况。通过分析及试验,确定了铸型转速、浇注温度和速度、两种金属浇注间隔时间,界面处选用1号保护剂,以及适合于双金属套筒的热处理工艺。研究结果表明,采用本离心铸造工艺制造双金属套筒,相对于镶铸工艺,简化了加工步骤,降低了材料用量,经济效益可观。     

Optimization of casting process based on the theory of inventive problem solving

Optimization of casting process involves the adjustment of parameters as well as the improvement of process schemes and measures. This paper proposes a new method based on the Theory of Inventive Problem Solving (TRIZ) for casting process optimization, and realizes the idea of applying TRIZ to optimize the casting process of a magnesium alloy intake manifold. By this method, the casting process is optimized so as to remove the shrinkage pores. The successful optimization of casting process demonstrates the feasibility of the proposed method.     

消失模铸造中的模型成型机

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,重点阐述了典型成型机在消失模铸造中的应用与技术特点,并对成型机的国产化研究与开发提出了建议.     

熔模铸造厂房工艺设计

以某新建熔模铸造项目为例,根据其产品种类多、材质非单一的特点,介绍了熔模铸造工艺的主要流程。基于熔模铸造工艺厂房的设计原则,合理设置熔模铸造生产蜡模成形、制壳、熔炼、清理等工序的布局,并结合生产情况,提出了熔模铸造环境保护的相关措施以减少对环境的污染。     

TBD620L6柴油机气缸体铸造工艺设计

对TBD620L6球铁气缸体的铸造工艺设计进行了介绍.对平做平浇、立做立浇、平做立浇三种工艺方案的优缺点进行了比较分析,最后决定采用立做立浇工艺.为达到既充型平稳,又能确保铸件上部温度较高、下部相对较低、有利于顺序凝固,采用阶梯式半封闭半开放浇注系统.为消除缩孔缩松缺陷,铸件顶部设置保温冒口,并在局部热节部位设置冷铁.按该工艺生产三年,废品率保持低于8％.     

铸钢冷却壁的铸造工艺

铸钢冷却壁作为换代高炉冷却壁,它与铸铁冷却壁相比有着本质上的性能提升.介绍了铸钢冷却壁铸造过程中各工序的要点,并针对冷却壁热面砖槽造型、冷却水管防熔穿措施和浇注过程控制等铸造难点给出了多种工艺方案,并通过生产实践证明了工艺方案的可行性.     

仿生表面减阻的研究现状与进展

仿生表面减阻是众多减阻方法中非常有前景的减阻方式。目前研究最多的是仿生鲨鱼皮减阻和仿生超疏水表面减阻,其中仿生鲨鱼皮表面减阻又分为直接复刻鲨鱼皮表面的盾鳞结构和仿鲨鱼皮沟槽减阻。文中介绍了国内外关于仿生减阻的最新研究进展及成果,综述了仿生鲨鱼皮表面减阻和仿生超疏水表面减阻的研究现状,探讨了仿生表面减阻未来的发展方向和研究重点。虽然仿生超疏水表面一般都具有粗糙的表面微纳结构以及较低的表面能,但不是所有的超疏水表面都具有减阻效果,因此超疏水表面的减阻效果还需要一个度量标准。     

高锰钢电铲铸件的生产

介绍了7C高锰钢电铲铸件前、后导轮的铸造工艺。前导轮采用圈冒口和边冒口,后导轮采用圆冒口;浇注系统为环形横水口,双层内水口;精炼钢水浇注温度在1 430~1 455℃之间;在300℃左右热割冒口并立即进炉热处理。采用该工艺已成功制造了4100XPC、2300XPC和2800XPC电铲铸件。     

激光快速成型用覆膜砂工艺性能探讨

探讨了激光快速成型用覆膜砂的工艺性能对激光烧结成型、铸型精度和铸件质量的影响，进而得到适用于激光快速成型方法直接制造铸件铸型用的覆膜砂烧结材料。     

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。     

基于快速原型技术的进气歧管模具制造

介绍了以快速原型技术和精密铸造技术进行进气歧管铸造模具制造的情况。结果表明，该工艺可更充分地发挥快速原型技术和精密铸造的优势，取得了缩短工期和降低成本的效果。     

喷嘴的熔模铸造生产工艺研究

重点介绍了喷嘴的熔模铸造基本工艺过程和主要工艺参数。结果表明,该工艺合理可行,解决了该产品普通铸造中的铸造缺陷问题。不但成功生产出了高质量的产品,提高了产品的合格率,而且还为同类产品的熔模铸造提供了参考。     

Gating system optimization of low pressure casting A356 aluminum alloy intake manifold based on numerical simulation

To eliminate the shrinkage porosity in low pressure casting of an A356 aluminum alloy intake manifold casting, numerical simulation on filling and solidification processes of the casting was carried out using the ProCAST software. The gating system of the casting is optimized according to the simulation results. Results show that when the gating system consists of only one sprue, the filling of the molten metal is not stable; and the casting does not follow the sequence solidification, and many shrinkage porosities are observed through the casting. After the gating system is improved by adding one runner and two in-gates, the filling time is prolonged from 4.0 s to 4.5 s, the filling of molten metal becomes stable, but this casting does not follow the sequence solidification either. Some shrinkage porosity is also observed in the hot spots of the casting. When the gating system was further improved by adding risers and chill to the hot spots of the casting, the shrinkage porosity defects were eliminated completely. Finally, by using the optimized gating system the A356 aluminum alloy intake manifold casting with integrated shape and smooth surface as well as dense microstructure was successfully produced.     

化学造型工艺减排的新认识与新措施

比较分析了化学造型和物理造型的典型工艺及其在铸造过程中的污染物种类及排放量。提出了化学造型(主要是树脂砂型)工艺在混砂、造型、浇注及砂处理工序中减少污染物排放量的新措施。研究表明:化学造型工艺的污染物排放量并不一定比物理造型工艺高,只要用好减排措施,也可以实现清洁生产。     

熔模铸造硅溶胶模壳制造工艺

介绍用石蜡-硬脂酸低温模料制作熔模,用硅溶胶作粘结剂制造模壳的工艺。包括熔模制造工艺、硅溶胶模壳工艺和焙烧工艺。生产实践证明,铸造硅溶胶模壳制造工艺是成熟的,为生产合格模壳和精密铸件提供了技术保障。