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This paper in view of present crude oil units running situation and the existence prominent question, in cooer with progress of production has carried out the corrosion mechanism research, the anticorrosion measure and the corrosion actually tests and analysis, the security and reliability analysis and the life forecast research, with the research of out and inner our country and the production actuality ,which provides a practical and feasible base for guaranteeing the equipment in the long-term and steady safe operation.

本文针对目前国内稠油加工常减压装置的生产运行现状和存在的突出问题,结合国内外研究工作和生产实际开展了稠油加工装置故障树分析、腐蚀机理、防腐措施、腐蚀实验、安全可靠性分析和寿命预测等方面的研究工作,为提高我国石油炼化装置的安全可靠性提供了理论基础和新的方法。

Finally, the implementation of the pencil and fillet cutting tool path generation is introduced.

最后介绍了清根补加工和区域补加工的刀具轨迹计算方法。

This article mainly elaborated numerical control lathe,milling machine utilizing the macro-program processing ellipse frustum of a cone,the surface craft route and essential method.

主要阐述了数控车床、铣床运用宏程序加工椭圆台、面的工艺路线和基本方法,结合实例分别分析了数控车床与数控铣床在椭圆加工过程中程序编制思路,并给出了FANUC系统常用车、铣椭圆粗、精加工宏程序。

At the same time, the function flow chart of machining simulation systems is given and a common method and process of developing machining simulation systems is educed.

同时,本文给出了金属切削加工模拟系统的功能框图和建立加工模拟系统的一般方法和步骤。

Secondly, the paper is expanded from follow three aspects: the virtual design, the virtual process and the product data managementduring the developing the torque converter. Applying the key technique of concurrent engineering---design for function, design for assemblyand design for manufactureof the method of design for "X", the virtual design of the torque converter is accomplished in CATIA V5. Then the model constitution and the simulation of virtual process of the torque converter is done in CATIA V5, including the model constitution and the simulation of 5-aixe NC virtual process of the vane, the model constitution(material:PVC) of the idler pulley rapid prototypingand the virtual assembly and the motion simulation of the torque converter, etc. 3-D data exchange between various CAD systems is realized by using STEP standard. The lever of classing the character model of the torque converter is given. And the access authorization is set up and given to manage the partners' reading/writing the product data.

应用并行工程的关键技术之一——面向产品全生命周期的设计DFX中面向功能的设计DFF、面向装配的设计DFA和面向制造的设计DFM的方法,在CATIA V5中完成液力变矩器虚拟设计;在CATIA V5中对液力变矩器进行虚拟加工建模和仿真,包括液力变矩器导轮叶片五轴数控加工刀轨建模与仿真、导轮快速成型RP建模、液力变矩器虚拟装配和运动仿真等;采用STEP标准实现多CAD系统之间三维数据交换,提出液力变矩器特征模型的分级标准并对三维模型数据进行分级管理,制定相应的权限等级以规范合作厂家的产品数据管理层次。

Further more, in order to express machining conditions with graph theory a new theory and space network are proposed, the decision of machining plan is made with incidence matrix.

提出了推理过程的具体算法,从而进一步提出了用图论来表达加工空间状态网络图,以及用有向图的关联矩阵进行加工方案的决策等新的理论和方法。

But with its variety and specialization , three-axial non-instaneous envelope method had not meet needs. So four-axial non -instaneous envelope method was set forth firstly in this article, which is based on three-axial non-instaneous envelope and spiral rod compressor rotator speciality.

然而随着螺杆应用范围的扩展,螺杆型线不断复杂化、多样化,三自由度无瞬心包络铣削法已不能满足部分型线的加工要求,为此本文在三自由度无瞬心包络铣削法的基础上,针对螺杆压缩机阴阳转子的特性,在国内首次提出四自由度无瞬心包络铣削螺旋曲面的新方法,赶超国际螺旋曲面加工技术水平,具有重要的理论和现实意义。

There isn't a efficiency method to measure the interelectrode gap of ECM.

在电解加工中还没有有效的加工间隙在线检测方法[1]。

Numerical analysis was made on magnetic field distribution in working area of magnetic abrasive finishing by the finite difference method,and a kind of arithmetic to calculate the isodynamic was put forward.

利用有限差分的方法对磁极开槽情况下磁力研磨加工区域中的磁场分布进行了数值分析,提出了一种等磁位线的计算绘制算法,得到了加工区域磁场分布的等磁位线图。

The isometric surface of the free form surface is generated for NC machining of the negative or positive model of the free form surface.

通过求等距面的方法,本论文解决了数控加工中的阴阳模加工问题。

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推荐网络例句

I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。