查询词典 machining

Key Laboratory for Precision and Nontraditional Machining of Ministry of Education

大连理工大学精密与特种加工教育部重点实验室，大连 116024

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。

When the system starts displaying machining animation, it does not need to calculate small triangular facets normal to the workpiece surface. It only needs to find out what part of the cutter cuts the workpiece surface and to read the normal from the file.

当显示加工动画时不必再计算毛坯表面小平面的法向量，仅仅需要计算是刀具的哪部分切削了该小平面，然后从文件中读出对应的法向量。

Keywords Numerical Control;Five -axis Machining;Tool Compensation

数字控制；五轴加工；刀具补偿

The parallel kinematic machine is a novel class of manufacturing equipment which rises in recent years. It can achieve multi axis linkage numerical control machining, assembling and measuring, and so on.

并联机床(PKM，Parallel Kinematic Machine)是世界上近年来逐渐兴起的一种新型制造装备，可实现多坐标联动数控加工、装配和测量等功能，更能满足复。。。

Furthermore, the highefficiency, high precision ultrasonic vibration honing equipment of horizontal type CSW-1 and vertical type CSL-1 adapting to the machining cylinder sleeve parts with material of engineering ceramics and the ultrasonic honing oilstone dressing fixture are developed.

针对这些问题作者研制了超声珩磨装备，分析了现有超声系统的缺陷并提出了超声珩磨系统的局部共振设计思想，通过材料的高效去除机理等问题的研究，发现了超声珩磨的特有工效。

Considering property of solid abrasive lapping with high machining efficiency and large proportion of auxiliary working time, this paper develops a new lapping machine with computer control technology and digital display technology. It can reduce worker's labor strength and auxiliary working time, on-line measure lapping height, assure workpiece size accuracy and lap automatically.

针对固着磨料研磨效率高，辅助工时比重大的特点，将计算机控制技术和数显技术应用于研磨机上，研制出新型研磨机，在减轻工人劳动强度的同时，大幅度减少辅助工时，并对研磨加工量能进行在线检测，以确保工件尺寸精度，提高了研磨机的自动化程度。

Considering property of solid abrasive lapping with high machining efficiency and large proportion of auxiliary working time, this paper develops a new lapping machine with computer control technology and digital display technology. It can reduce worker's labor strength and auxiliary working time, on-line measure lapping height, assure workpiece size accuracy and lap automatically and improve lapping machine properties.

针对固着磨料研磨效率高，辅助工时比重大的特点，将计算机控制技术和数显技术应用于研磨机上，研制出新型高速研磨机，在减轻工人劳动强度的同时，大幅度减少辅助工时，并对研磨加工量能进行在线检测，以确保工件尺寸精度，提高了研磨机的自动化程度，改进了研磨机的性能。

Compared with ordinary products, certain products are more complex structure of many parts, precision machining and assembly process requirements, such as significant quantities of small features, but also the development of process planning, production scheduling and operations, such as a severe challenges.

与普通产品相比而言，某些产品更具有结构复杂、零部件众多、加工及装配工艺精度要求高、批量小等显著特点，也对工艺规划的制定、生产组织和作业排程等提出了严峻挑战。

Key words: numerical control machine tool; numerical control machining; opposite clearance; vector operation; precompensation

关键 词：数字控制机床；数控加工；反向间隙；向量运算；预补偿

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。