零件

Through analysing the structural feature and pressing technical of LJ465Q-1A petrol motor front encloser,these design emphasize introduce the pressing process planning and punch flush trim die , hole flanging moding design of petrol motor front encloser, approach how to avoid flaw , ascertain rational pressing process and dying structure ,finally in terms of pressing process drawing ,achive the punch shaving die ,hole flanging structure design and assembly drawing , major parts drawing of the part .

本设计通过对LJ465Q-1A汽油发动机前罩壳的结构特点和冲压工艺分析，着重介绍了该零件的冲压工艺过程设计及冲孔修边模、翻孔模的设计要点，探讨了避免缺陷产生的方法，确定了合理的冲压工艺过程和模具结构，并以冲压工艺过程图为依据完成了该零件冲孔切边模与翻孔模的结构设计和装配图、主要零件图的绘制。

In order to develop this local property,this paper presents a method,which uses Fourier Series to approximate the boundary shapes of the shafts with periodic boundary of cross section,and uses the conformal mapping in Theory of Function of a Complex Variable to make the complicated boundary shapes of the shafts map a unit circle.Thus elastic theory can analyze...

本文提出一种方法，其实质是：采用富里埃级数来逼近横截面呈周期性变化边界的轴类零件的边界形状；并应用复变函数论中保角映射原理，将零件复杂的边界形状映像成单位圆，从而使弹性理论可以分析和计算复杂边界轴类零件的应力场；再通过留数的求解实现保角映射的反变换。

After the fatigue curve with 50% reliability and a few fatigue test results of a crane element have been known, the method, namely JFKC method, in this paper can be used to get the fatigue limiting stress distribution of this crane element quickly, based on the Miner Hypothesis and.

本文在已知某种起重机零件可靠度为50%的疲劳曲线并有了该种零件的少量试件的疫劳试验结果的条件下，以作者提出的修正的曼耐尔假设和抛物线假设为基础，提出了起重机零件疲劳极限应力分布的快速测定法——JFKC*法。

The graphical display for laser cutting based on industrial PC is presented in chapter 4, from which the programmer can check the program through the map of parts program on the screen.

编程人员可以对照零件加工程序映射到屏幕上的零件轮廓来检查编程错误；在动态图形显示中，采用部分屏动画技术，既能满足图形显示的实时性，又能产生良好的显示效果。在图形显示的基础上，采用定性定量相结合的方法解决了零件轮廓自动回避顶针这一问题。

A mixed method of conjugate gradient method and steepest descent method ;2. The Modified Steepest Descent Method──Best Point in Steepest Descent method;3. This paper presents the mathematical model for the optimization of heterogeneous components, and the method using sensitivity analysis and steepest descent method to optimize material properties, the component is then identified.

阐述了非均质材料零件设计优化的数学模型，并采用灵敏度分析以及最速下降法对其各个材料区域的材料性能进行设计优化，得到最佳材料性能参数后，再从非均质材料数据库中找到相应的工程材料，合成满足设计要求的非均质材料零件该方法为设计者提供了切实可行的非均质材料零件的材料设计方

Through to the outline basic point, nodal calculation procedure, and simulation emulation design of system, can compare outline describe precision, control the quality of part processing, know that the approximate law that described of the part.

通过对零件轮廓的基点、节点计算程序的设计，以及模拟仿真系统的设计，可以比较轮廓描述精度，控制零件加工质量，掌握零件近似描述的规律。

When you create a simplified substitute part, it is good practice to structure the part geometry such that the part origin and coordinates match the origin and coordinates of the assembly it substitutes.

您建立简化的替代件零件时，最好对零件的几何图形进行结构化，使零件的原点及座标与其替代的组合的原点及座标相符。

Based on coupled heat transfer theory and finite element method , outer boundary conditions between parts were transformed into inner boundary conditions of the component

基于耦合传热理论和有限元方法，将零件间的外边界条件转变为零件的内边界条件，直接对零件进行耦合仿真计算。

The method of reading the line, arc, spine, tolerances, surface roughness and full messages of the part from DXF file generated by AutoCAD is mainly introduced. Based on the study of DXF, a program interface is developed, by which the data can be shared among different CAD systems. According to the different Characters, the respective tool paths are designed. And by a machine configure file, the General postposition process is deal with. On the research of thegeneral simulation technology that is based on the NC codes. By analyzing the characteristics of the CNC system and the NC codes, a set of general simulation interface is developed.

本文主要介绍如何从AutoCAD生成的DXF文件中读取直线、圆弧、样条曲线、尺寸公差、表面粗糙度等信息及零件的全局信息，结合回转体零件的特点，通过对应用广泛的DXF的深入分析，建立了与不同CAD系统实现数据共享的编程接口；根据零件的不同加工特征提出了相应的走刀路线，并通过机床配置文件，初步实现了通用后置处理；研究了数控系统和NC代码的特点，建立了仿真通用接口，并提出代码翻译地基本思路。

In this paper the conception of remanufacturing machining is described, and analyze qualification for worn parts remanufacturing machining, then classify the remanufacturing machining methods, finally discuss the remanufacturing features of some mechanical machining methods, such as restore dimension method, rabbet part method, part replacing method, conversion and plasticity distortion method.

本文叙述了再制造加工的概念，分析了失效零件进行再制造加工的条件，并对再制造加工技术方法进行了分类；重点分析了失效零件机械加工法再制造的特点，并探讨了常用的修理尺寸法、钳工再制造恢复法、镶加零件法、局部更换法、换位法和塑性变形法等再制造修复方法。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐