锻压技术

基于UG二次开发的精锻航空叶片型面参数提取技术

英文标题：Extraction technology of precision forged aeroengine blade profile parameters based on the second development of UG

作者：王溢鸿吕彦明刘泽涛刘东帅杨华

单位：江南大学

关键词：叶片型面参数航发叶片 UG二次开发参数提取最小二乘法

分类号：V263.1

出版年,卷(期):页码：2020,45(3):197-202

摘要：

针对精锻航空发动机叶片型面特征参数的提取的实用性要求，研究了基于 UG环境下航空叶片型面特征参数的提取技术，对于叶片型面的检测，主要针对的是叶片的各个截面参数，如前后缘、弦长、最大叶型厚度等。针对叶型的前、后缘特征，采用带约束的最小二乘法进行轮廓拟合；针对弦线特征，在坐标变换原理的基础上，采用投影法求解弦长和弦线角；针对中弧线特征，采用内切圆法求解，同时提取内切圆的圆心位置，求解出叶型的最大厚度等。最后，以某型号叶片为例，将提取数据与理论叶型参数值进行对比，验证了该技术的准确性。通过提取的截面轮廓特征数据，可以为测量路径规划、测量数据配准和线轮廓误差评定所需的参数提供理论支持。

For the practical requirements for extracting the characteristic parameters for precision forged aeroengine blade profile, the extraction technology based on the second development of UG was proposed, and the detection of the blade profile was mainly aimed at the various cross-section parameters of blade, such as the front and back edges, the chord length and the maximum thickness of the blade profile. Then, for the characteristics of front and back edges for the blade profile, the contour fitting was conducted by the least square method with restraint, and for the chord characteristics, based on the principle of coordinate transformation, the chord length and angle were solved by the projection method. In view of the characteristics for middle arc, the method of inscribed circle was adopted to solve the problem, at the same time, the center position of the inscribed circle was extracted, and the maximum thickness of the blade profile was obtained. Finally, for a certain type of blade, the extracted data with the theoretical blade profile parameter values were compared to verify the accuracy of the technology. Thus, the extracted profile data provides theoretical support for the parameters needed for the measurement path planning, measurement data registration and line contour error evaluation.

基金项目：

国家自然科学基金资助项目(61409230303)

王溢鸿（1992-），男，硕士研究生 E-mail：2424233659@qq.com 通讯作者：吕彦明（1966-），博士，教授，硕士生导师 E-mail:lvyanming126@126.com

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