加工方法

Theoretical verification of generating method for grinding of gear involute helicoid;2. This paper proposes a new machining method of dram gear generating method in numerical control chine,which is simple and convenient and can pledge accurate engage gears.

针对鼓形齿常用切削方法中存在的不足，提出了一种在数控机床上用展成法加工鼓形齿的新方法，并对加工过程进行了啮合分析，得出结论：用数控机床只要改变程序便可加工任意齿数的齿轮，并可达到预期精度。

The interpolate algorithms of three-order NURBS curve and double three-orders NURBS surface are presented. The expressions of partial derivative and normal curvature of NURBS surface are derived by the theory of differential geometry. The geometric characteristics of different curvature area of the free-form surfaces are analyzed in detail. All these work lays a theoretical foundation for constructing the cutter location calculating model of free-form surfaces NC machining. 2 On the basis of analyzing the methods of cutter path generation, the standard of evaluating the various methods of cutter path generation is presented. The method of generating cutter path with constant scallop height is presented for the first time.

本文以提高复杂曲面多坐标数控加工精度和加工效率为目的，在对国内外研究现状进行深入分析的基础上，对数控编程中各环节的关键技术问题进行了深入研究，主要内容包括以下几方面： 1 分析了复杂曲面各种造型方法的优缺点，给出了根据各种边界条件所确定自由曲面的NURBS表示方法以及三次NURBS曲线曲面反算算法；用微分几何理论推导了NURBS曲面的偏导矢及法曲率计算表达式；对曲面不同曲率特性区域的几何特征进行了深入分析，为建立复杂曲面的数控加工刀位计算模型奠定了理论基础。

Distortion discipline of line heating for automatic processing is researchedThe main influence factors of shell plate forming by line heating are analyzed. Based on the analysis of measured data processed by the experiment machine of line heating, thickness of plate, length of heating line, processing speed and shrinkage are regarded as 4 dimensions, and the methods of vectors mapping, plane projection and conversion of coordinates are used to build mathematical models for local surface shrinkage of different thickness and processing parameters.

1研究了自动化加工水火弯板变形规律分析了水火弯板加工成型的主要影响参数，在对水火弯板实验机加工测量数据分析的基础上，以板厚、加热线长度、加工速度和收缩量作为4个维度，应用向量映射，平面投影、坐标转换方法建立了不同钢板厚度的局部表面收缩量和加工参数的数学模型。

In view of the complex nature of distortion problem, a method combining finite element simulation with experiment and theoretical analysis is adopted in this dissertation. Then, the distortion prediction method and distortion law of monolithic component are researched deeply and widely.

本文在阐述航空整体结构件国内外加工研究现状、产生变形原因的基础上，采用实验研究、理论建模和有限元模拟分析相结合的方法，对钛合金航空整体结构件铣削加工变形的预测方法和加工变形规律进行了深入、系统的研究。

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。

In this thesis, Node-Area Method, a new method to modeling Microfabrication of single silicon, is firstly introduced. This method is based on ESHAPE method and CA method. It takes advantage of both methods, and meanwhile, avoiding lower simulation precision of the former and lower computation efficiency of the latter. A new software is developed to simulate silicon bulk micromachining process. It can be applied to redisplay the process of MEMS Manufacture to help designer to design complex MEMS structures.

本论文引入一种新的单晶硅的加工建模方法——节点－区域法，它是借鉴原有仿真建模方法Eshape法和CA法的优点，并将两者适当的结合，克服Eshape法仿真精度低和CA法计算效率低的不足，开发出一个新的体硅加工工艺过程仿真软件，应用于设计和制备复杂的MEMS结构件，来更好的再现MEMS实际加工工艺过程，辅助MEMS设计人员设计开发复杂的微器件。

To improve the manufacturing capability of shoe tree in our country and enhancethe market competition, this paper studys a new method of motion control formachining shoe tree with NC machinetool. This paper discusses a method ofoptimizing the transmission system ,analyzing the stability of Servo System andascertaining every gains of servo system through dynamics emulation, analyzing themotion control of velocity and acceleration, programming to build NC programautomatically and developping a trajectory emulation software to emulate the tool'smachining movement.

为了提高我国鞋楦制造水平，增强产品市场竞争力，本文研究了鞋楦数控加工运动控制方法；对鞋楦机床的数控进给传动系统进行了优化设计和载荷匹配分析；分析了伺服控制系统的稳定性，并通过动态仿真确定伺服系统各环节的增益系数；分析了鞋楦加工运动速度和加速度控制方法；编软件自动生成数控程序；最后开发了鞋楦数控加工仿真软件。

Because of precision requirements,it is quite difficult to guarantee processing quality by slotting or broach.

在采煤机零件加工中，常常遇到深内孔长键槽的加工，由于精度的要求，用插削的方法很难保证加工质量，用拉削方法又不适宜。

According to the working procedure chart of theZH1105W diesel engine's gear cap analysis workpiece's precision, the surface roughness, thespecification, the processing spot size, the shape structure,material degree of hardness, the work piece rigidity and thedifferent of the components batch size to definite technique andtechnological process, determine aggregatemachine-tool's overall plan. Consider to theirregularity components but have high accuracy holes to beprocessing. So,"two holes at aface" is the best localization plan.

根据ZH1105W柴油机齿轮室盖的工序图分析其精度、表面粗糙度、技术要求、加工部位尺寸、形状结构、材料硬度、工件刚性及零件的批量的大小不同，确定被加工零件工艺方法和工艺过程，确定该组合机床的总体设计方案；考虑该零件表面结构的不规则性但有较高精度的孔需要加工，定位基准选择&一面双孔&是最佳的方法。

Robotized magnetic abrasive finishing for mould cavity surface;2. Discussing the method of generating mould cavity machining tool path and the layout of the tool path, illuminating the problems of tool choice at present.

本文讨论了模具型腔数控环切加工轨迹生成和规划方法，对目前刀具选择的问题进行说明，提出了刀具选择的方法，达到了加工刀具优化选择的目的，从而提高了数控加工效率。

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。