V法造型线砂处理系统的设计与应用

随着人们对V法造型认识的增加和V法技术掌握程度的提高,V法造型线在生产中的使用越来越多,与之配套使用的V法砂处理系统的的磁选问题,成为V法生产中的瓶颈。本文介绍了一种V法造型线砂处理系统新的设计思路、组成和工作特点。经生产实践证明,该V法砂处理系统有效解决了V法造型线砂处理系统磁选的难题,满足了造型线的生产需求,提高了生产率。     

转盘式V法造型线设计

介绍了转盘式V法造型线的设计思路和设计特点．该生产线造型机采用四工位转盘设计．可以同时放置两副模型框循环使用;造型线采用PLC程序控制,根据生产程序自动运转,整个过程无须人工干预,生产灵活方便,高效快捷提高了生产效率;浇注冷却段采用地面人工生产的模式,既满足了生产需要,又节约了设备投资。该生产线生产率：8型／小时,砂箱尺寸：1300×1300×450／450。     

中小型铸件V法铸造生产线设计

根据中小型铸件V法铸造生产线的特点,阐述了V法造型线的工艺流程和主要技术参数,分析了砂处理系统需要解决的问题,并介绍了V法铸造生产线的主要设备.V法铸造生产线采用半自动化控制,可缩短生产周期,提高生产效率.     

自动翻箱合箱装置在V法生产线中的应用

V法铸造生产中翻箱、修型及合箱是影响造型线生产率和造型质量的一个重要环节,本文介绍了一种全自动在线翻箱合箱装置,对其结构特点和工作过程进行了阐述,并介绍了该装置在生产中的应用.     

12型/小时六工位转台式负压造型生产线

该负压造型生产线(亦称V法造型)主要用于生产工程机械用履带板,生产线不仅包括传统的造型单元、浇注、冷却单元及砂处理单元,而且为提高生产效率,增加了下芯单元.     

V法铸造工艺、设备和质量

介绍了利用真空V法工艺生产铸铁件、铸钢件的实际应用过程,总结了V法造型工艺的优缺点和操作技巧.     

V法从基础实验到装置研制的历程

1 V 法的解悟1971年春 V 法在秋田公司诞生。同年11月开始与新东公司共同研制 V 法设备。当时,发明不久的 V 法在生产铸件的理论还未搞清楚,生产技术还不成熟的状况下,只在秋田公司和前田铁工厂生产极少量的铸件。新东公司组成30人的研制组,平行地开始了阐明 V 法理论而进行的基础实验和用于V 法造型的设备的研制工作。1.1 对新方法如梦的期待     

用V法造型工艺生产机床铸件

介绍了采用V法造型工艺生产T型槽机床铸件的装备、工艺过程和工艺特点,分析了造型过程中存在的问题及解决方法,指出V法造型工艺生产铸件易产生机械粘砂、塌砂、拔缝及厚度增加和气孔缺陷,并提供了应对方法。     

V法造型主要设备常见故障分析

V法造型工艺在铸造行业已经被广泛应用,但V法造型设备的发展却比较缓慢。由于非标设备的缘故,设备在安装调试和使用过程中,经常发生故障,影响设备的正常使用。本文列举了V法造型设备经常出现的故障,分析了故障的原因和解决方案。     

年产10000 t高锰钢铸件的车间设计

介绍了年产10000t高锰钢大型锤头的车间设计过程。设计采用2台HX-5电弧炉熔炼、1台LF-15钢包精炼炉精炼，V法造型生产高锰钢大型锤头，配有1套20t／h干砂处理系统，铸件无损探伤采用X光探伤仪，设计采用两班平行工作制年产10000t高锰钢铸件。同时介绍了如何保证钢水质量、造型质量等，分析了V法造型工艺的主要特点，阐述了砂处理的工艺流程。     

基于三维造型软件创建协同造型原型系统

基于三维造型软件创建了协同造型系统,详细介绍了系统的结构、工作流程以及模型特征提取、数据的网络传输等关键技术,并通过具体实例,验证了协同造型系统的实用性.     

企业建模方法及ARIS建模过程应用研究

面对环境变化,建立企业模型成为企业管理的重要手段。文章首先介绍了企业建模的概念,其次比较了常用的建模工具,然后着重探讨了集成信息系统体系结构(ARIS)建模过程的视图结构与建模层次,最后以实例介绍了采用ARIS工具对业务流程进行建模的具体过程。     

基于OWL建模语言实现分布式企业建模的研究

为解决分布式企业建模的知识推理和集成问题，利用OWL的本体技术和传输能力以及作为W3C标准的优势，提出了基于web本体语言OWL的集成化建模语言OWL Based Integrated Modeling Language（OBIML）。OWL作为OBIML的元元模型，对OWL扩展建立的OBIML Schema作为OBIML的元模型。开发的分布式建模工具共享OBIML Schema，实现了图形化模型和OBIML描述的模型之间的转换以及模型的传输、集成和知识推理。给出基于OBIML的分布式建模工具的框架。并通过实例验证了应用OBIML实现分布式企业建模的正确性和可行性。     

Modeling Multi-Arc Spraying Systems

The use of plasma as energy source in thermal spraying enables among others the processing of feed stock materials with very high melting temperatures as coating materials. New generation multi-arc plasma spraying systems are widely spread and promise several advantages in comparison to the conventional single-arc systems. Numerical modeling of multi-arc plasma spraying offers the possibility to increase the understanding about this process. This study focuses on the numerical modeling of three-cathode spraying systems, introducing the recent activities in this field and discussing the numerical aspects which influence the prediction power of the models.     

Arc Plasma Torch Modeling

Arc plasma torches are the primary components of various industrial thermal plasma processes involving plasma spraying, metal cutting and welding, thermal plasma CVD, metal melting and remelting, waste treatment, and gas production. They are relatively simple devices whose operation implies intricate thermal, chemical, electrical, and fluid dynamics phenomena. Modeling may be used as a means to better understand the physical processes involved in their operation. This article presents an overview of the main aspects involved in the modeling of DC arc plasma torches: the mathematical models including thermodynamic and chemical nonequilibrium models, turbulent and radiative transport, thermodynamic and transport property calculation, boundary conditions, and arc reattachment models. It focuses on the conventional plasma torches used for plasma spraying that include a hot cathode and a nozzle anode.     

Modeling of electrochemical noise transients

Starting from the elementary corrosion reactions on a passive metal surface a model is developed for the origin of electrochemical noise. The ion currents flowing at the electrochemical reactions are described by the electrons remaining in the metal and then interpreted as a measuring signal. The measurable sum current is composed of the superimposition of the electron currents of the partial reactions. Due to the inhomogeneity of the metal surface, local metal dissolutions take place in preferential areas until the area is consumed or repassivated after short times. The short‐time surplus of free electrons leads for every metal dissolution event to a current transient, which itself consists of the partial currents of the elementary anodic and cathodic reactions. Due to the different reaction speeds, there are temporary charge disequilibria and thus measurable noise transients. In model calculations the influence of the diffusion of the oxygen on the sum signal as well as the variation of the anodic current is shown. Furthermore, the results show that a measurable noise signal can only arise under certain conditions. This signal arisen directly at the metal surface is not, however, ascertainable without further amplification. In the measurement amplifiers filter stages play an important role for signal conditioning. The influence of the measuring technique is shown at the filtration of a simulated test signal in different frequency domains. It is discussed how the signal distortion affects the detectability of the partial reactions described at the beginning and in which way the noise signal is estimated. Indications for the layout of suitable measuring parameters are given.     

相关性几何造型初探

本文明确提出几何造型中的相关性概念,给出了它的定义、性质及分类。论述了拓扑相关性、几何相关性、表示相关性、操作相关性、表示与操作的相关性以及它们之间的关系。运用相关性思想建立保证一致性机制,提高实体拼合运算的可靠性。     

Modeling of oxidation-induced growth stresses

Stress induced by the oxidation process is studied using an analysis based on the stress-driven diffusional flux of oxygen ions along oxide grain boundaries. The calculated stress, which is considered to originate from the constrained lateral expansion of the oxide scale, is in reasonable agreement with measured values.