In this paper , great research has been carried on in the field of nc machining technology of complicated parts based on il & sm flexible fixture , including the following four aspects : 1 作者主要研究基于il & sm柔性夹具的复杂零件数字化加工关键技术。主要包含以下四部分： 1
In view of the process of reproducing of actual details in reverse engineering , a new process is proposed in this paper in which the surface of details is dividing by character in its measurement and reconstruction 本文针对逆向工程中复杂零件表面的反求过程，提出对复杂零件表面按特征划分进行测量和曲面重构的反求路线。
At the same time , the systematic also can be inputted entity model which generated by other cad software . translate the entity model to facet model , and obtain the geometry models of compound parts 同时，系统也能够输入其它cad系统产生的几何模型，经过转换，把几何模型变为以面片模型表达的构件单元，实现复杂零件的建模。
In the measurement of dimention , shap , and deformation for 3 - d object , the measurement , and surface testing of complex precision components for microelement , and industrial inspection as well as remote sensing measurement etc . , it finds wide use 它广泛应用于三维物体的几何尺寸、形状、变形等的测量，精密复杂零件的微尺寸测量和外观检测，工业监测及航空遥感测量等技术领域中。
With the aid of il & sm fixture system put forward by professor li beizhi , variety of complicated parts are able to be located and fixed reliably . the location of the blank is reached by locating components and the initial state is memorized throughout the machining process 采用李蓓智教授等提出的一种非传统的工件安装技术和能够主动寻位与状态记忆的通用夹具系统( initiativelocationandstatememory ? il & sm ) ，可以实现对任意形状复杂零件的可靠定位和装夹。
Image measurement is a new measuring technology . it based on the optics , and syncretized electronics , computer science , laser science , and image processing technology , then , the image measuring system is formed . edge location is a key skill in the image measurement , and locating edge in pixel is satisfactory in common usage 图像测量是近年来测量领域中形成的新的测量技术，它以光学为基础，融合电子学、计算机技术、激光技术、图像处理技术等现代科学技术为一体，组成光、电、计算机综合的测量系统，它被广泛应用于几何量的尺寸测量、航空遥感测量、精密复杂零件的微尺寸测量和外观检测等和图像有关的技术领域中。
By iterative simulation calculating , relatively good trimming line can be obtained and an actual flanging experiment is carried out in order to verify the correctness of the method . the application proves that the method proposed in this paper could solve the problem well . the method can efficiently reduce the time and the cost of the development of the new product 实践证明，运用本文采用的方法能较好地解决复杂零件翻边工序中确定修边线的难题，该方法可以明显地减少修边线确定中的试凑次数，从而有效地缩短新产品的开发周期，节省开发费用，同时也发展了cae在冲压成型中的应用。
Two method are provided in this system - template part based planning and typical feature based planning . with the aid of this system , people can make full use of those useful machining processes and knowledges , and do nc programming more effectively . at the same time , capp and cam is integrated 系统提供了基于典型零件工艺和基于典型工艺特征两种方法，通过借鉴已有工艺设计经验和经实践验证的工艺参数，帮助工艺人员快速有效地生成复杂零件的数控工艺及其nc代码，实现了capp与nc编程的一体化操作和信息的有效集成。
