查询词典 electric arc process

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中文主题词事故预防；麻醉学；球压试验；防护等级；分类；分类系统；清除；色码；设计；测定；词典；尺寸；文献；接地导线；接地；电接触保护；电气外壳；电力干线；电力系统；电击；电气事故；电气器具；电气工程；电气设备；医用电气设备；电气保护设备；电气安全；电驱动装置；电磁兼容性；电医学；静电学；外壳；环境条件；设备；设备安全；防爆；防火安全；一般条件；图形符号；热卷筒；冲击试验器；检验；使用说明；绝缘外壳；绝缘；漏电路径；文字书写；表；作标记；测量；机械安全；医疗设备；医学放射学；医学科学；医疗技术学；职业安全；保护覆盖层；合格试验；辐射防护；安全；安全装置；安全工程；安全规则；安全要求；安全标志；规范；材料强度；调查；符号；温度；试验大气环境；试验设备；试验；试验条件；试验电压；变压器

The process features and shape features of the electronic part are classified and defined, and then the feature model library is built, which enables rapid input of the part information. The rules and methods of stamping process design are summarized to build the stamping process library, so that the stamping process can be designed rapidly and intelligently. Furtherly, the process design rules and methods in process station layout of multi-station progressive die as well as the methods of decompounding and compounding process and the expression method of the process station layout are concluded and summarized, and then the rule library and case library of process station layout are built. Designing the process station layout rapidly is carried out based on rules and cases. At last the rapid design function of process station layout is validated through simulating the rapid designing layout system of multi-station progressive die on Pro/E 3D platform.

主要研究成果有：对电子产品冲压件的工艺特征与形状特征进行了分类和定义，建立了特征模型库，实现了冲压件信息的快速输入；归纳了冲压工艺设计规则和方法，建立了冲压工艺知识库，实现了冲压工艺快速与智能化设计；归纳总结了多工位级进模工步排样中的工序设计原则和方法，工序分解与工序组合方法，工步排样知识的表示方法，建立了工步排样规则库和实例库，利用基于规则和实例的推理方法，实现了工步排样的快速设计；在Pro/E三维软件平台上开发了电子产品多工位级进模工步排样快速设计系统，系统通过实例验证了工步排样的快速设计功能。

On the base of practical transformer substation main connection, electric components and system circuit model are first formed in the paper; analyze vacuum arc characteristic and medium resume are analyzed, then, according to vacuum chamber physical process of switching AC arc, resume process are divided into three stages: sheath development, neutral particles diffusion and static characteristic, with that, calculating model of medium resume strength is erected and applied in the computing of vacuum circuit breaker interrupting transform overvoltage; In the paper, Saber software is used to simulate a whole switching process; As follows, overvoltage characteristic of vacuum circuit breaker switching no load and load transformers, kinds of influence factors are analyzed in detail; At last, vacuum circuit breaker switching capacitance group overvoltage formative causes and electrode refining for lessening reignition are discuss.

本文针对中低压变电站的实际主接线建立各电气元件及系统的电路模型；在真空电弧的特点及间隙的介质恢复特性上，依据真空断路器灭弧室分断电弧的物理过程，将真空电弧熄灭后的恢复过程分为鞘层发展、中性粒子扩散和静态特性三个阶段，建立了相应的介质恢复强度的计算模型，应用到切除变压器操作过电压的计算中；采用Saber仿真软件模拟计算真空断路器切除变压器操作过电压；并分别对真空断路器切除空载及负载变压器操作过电压的特点与影响操作过电压的各种因素做了详细的分析；最后简要分析了真空断路器开断电容器组过电压的形成原因及为减少重燃的电极老炼措施。

The objectives of this paper were to investigate the simulation and design of continuous multiple-station rolling forming process for a U-Section Steel Bar by CAE software-DEFORMTM Due to the limitation of elements number using a short strip 120mm went through all the stations to simulate the real continuous rolling forming on factory The roller gap was fixed as 0 30mm roll speed was 20 rad/sec and progressive angles were all equal for each rolling process which were the formed angle divided by by the number of station Three rolling processes were selected with 6 9 and 12 stations respectively During simulation processes two cases occurred Case A the strip was through a single station Case B the strip across two stations Because the strip laterals side was stretched and twisted during the process The model of case B closer to the practical process than case A and the calculated stress and strain on the tip of U section for case A were lower than these for case B by up to 15% From the result of case B for each process the stress for 12-station process was smallest 9-station process second and 6-station process next Because less-station can save larger cost and forming time but the bigger stress and strain for 6-station caused wrinkles on lateral sides not found on 9-station and 12-station Therefore 9-station process was a more suitable design than 12-station process smaller stretched and twisted and stress The progressive angles for 12-station was 7 5?

本文主要是以DEFORMTM有限元素软体模拟U型钢片连续道次成型与单一道次成型以确认单一道次模拟的是否可取代连续道次模拟之研究。因DEFORMTM 软体对於网格元素上的限制故使用较短素材120mm通过所有的成型站以模拟工厂实际连续成形方法。辊轮间隙固定为0 3mm；辊轮转速为20 rad/sec；弯曲角度的方法为将成型角度平均除以成型站数。有三种辊轮成型方式被选择分别为6站，9站，与12站。在模拟的过程中有两种现象会产生 Case A，素材通过单一成型站。Case B，素材会通过两个成型站。因为在模拟过程中素材的两端会有拉应力与扭力。Case B的模拟比Case A像实际的制程，并计算应力与应变在U型断面的Tip部中可发现Case A比Case B低约15%。从Case B的每站的结果可以得知，12站的成型应力最小，9站次之，6站最后。

Our plant develops usualness inter-access technology communication with more than ten international famous electric furnace manufacturing companys,and repeated visits to the foreign advanced electric furnace factories and institutes every year, learning and absorbing foreign advanced industrial furnace manufacturing technology and production processes, technology, special components of electric furnace improving technology, product upgrading technology, it makes our plant keep synchronization with the international advanced industrial furnace manufacturing technology no whether in the type,the updating of furnace, fundation material progress, components manufacturing technology progess , manufacturing automation, and the way the loading of the loading basket manufacturing technology, WDS lining energy saving techniques, ceramic fiber wave of high pressure tied ceiling stack technology, oxidation-free protection atmosphere, carburizing, nitriding, molten, salt bath, nitrate Austempered, precision heat treatment process, equational flow and temperature heat transfer asymmetric quenching tank manufacturing technology, microcomputer program heat treatment technology curve temperature control process , and so on can keep pace with internationa advanced industrial electric furance manfacturing technology.

我厂与国际十多家著名电炉制造公司开展经常性互访技术交流，每年多次前往国外先进电炉制造厂和研究所，学习并吸收国外先进的工业电炉制造技术和生产过程，工艺技术，电炉专用零部件改进技术，产品更新换代技术，使我厂工业电炉产品无论在品种类型，炉种更新，基础材料进步，零部件制造技术进步，制造工艺自动化，装料方式和装料筐制造技术方式，WDS炉衬节能技术，陶瓷纤维波浪叠法高压捆扎吊顶技术，无氧化保护气氛，渗碳，氮化，盐浴，硝盐等温淬火，精密热处理工艺，均流均温换热不对称淬火油槽制造技术，微电脑程序热处理工艺曲线控温等各个方面，能够与国际上先进工业电炉制造技术保持同步。

On the basis of theoretical analysis to interrupting process in low voltage circuit breaker, a chain arc model is set up for magnetic field driven arc in arc chamber.

本文对低压断路器的开断过程进行了详细的理论分析，提出了一种低压断路器的链式电弧动态数学模型。

The previous research mainly depends on the arc voltage to estimate the arc position, and testing the dielectric recovery strength, and reignition process to judge the ability of arc extinguishment.

以往的研究工作主要根据电弧电压波形来判断电弧大概的位置，利用介质恢复强度测试和大量的重燃试验来判断低压电器的熄弧性能。

A computerized welding arc spectrum information sampling and processing system are developed to study of the ultraviolet spectrum distribution feature. Corresponding softwares also is developed. A process for sampling the ultraviolet spectrum automatically and the real-time monitoring of welding parameter are realized. based on the principles of the physics of arc and spectroscopy the information of welding arc ultraviolet spectrum sampled is changed and processed.

焊接电弧紫外光谱信息的计算机采集与处理系统*韩国明吴钊柳刚云绍辉李俊岳摘要以焊接电弧紫外光谱的分布特征为研究对象，研制了一套焊接电弧紫外光谱计算机采集与处理系统并开发了相关软件，实现了紫外光谱采集过程的自动化、焊接电流与电弧电压的实时监测，并在电弧物理和光谱学原理的基础上，对采集的焊接电弧紫外光谱信息进行变换和处理。

In this paper, used the 2-D optical fiber measurement system to investigate the whole process of arc movement, and the influence of the arc movement to the post current zero state of arc.

本文借助光纤测试系统从微观上研究电弧的运动全过程，分析电弧运动形态对电流过零后电弧状态的影响。

4There is not the electric arc ray radiation owing to the fact that burns down on the electric arc soldering flux layer.

由于电弧焊剂层下燃烧，没有电弧光辐射。

As a dominant party,CPC government should play a guardian,supervisee and guarantee role to overcome all the difficulties in the development of charitable cause and bring it into full play in the establishment of harmonious society on policies and regulations basis.

在中国共产党的文献中第一次把发展慈善事业提到&最广泛最充分地调动一切积极因素，不断提高构建社会主义和谐社会的能力&的高度来认识。近年来，社会学界对慈善事业的理论专著发表较多，有鉴于此，笔者不揣浅陋，谈谈自己的认识和见解。

Flow through the land, the land of the scale of operation allows the effectiveness of the land may be raised.

通过土地的流转，土地的规模经营可以让土地的效益得到提升。