基于UG二次开发的叶片预锻型线设计研究

Research on Pre-forging Profile Design Based on Secondary Development of UG

针对航空叶片预锻件设计过程中,生成预锻型线流程固定且复杂,易错但不易改等问题,利用UG二次开发技术,开发了预锻型线快速设计工具。首先,采用等距偏置法开发了叶片中弧线自动生成功能;基于分而治之思想,快速确定叶片最大厚度圆圆心位置与半径,并实现中弧线在进气边出气边两侧的快速划分;使用map数据结构,记录偏置过程中的数据,实现中弧线上各点的内切圆半径的快速计算;最后设计用户交互界面,预留局部调整窗口,实现对生成曲线的局部调整,保证预锻型线的质量。实验证明,该系统可以根据工程实际需求快速生成叶片预锻型线,极大提高了设计效率。

Aiming at the problems of fixed and complicated pre-forging profile generation process in the design process of aviation blade pre-forging parts,error-prone but not easy to change,a rapid pre-forging profile design tool is developed using UG secondary development technology.First of all,the automatic generation function of the axail curve of the blade is developed using the equidistant offset method.Based on the idea of divide and conquer,the center position and radius of the maximum thickness circle of the blade are quickly determined,and the arc is quickly divided on both sides of the inlet and outlet sides.The map is used to record the data in the offset process,and the rapid calculation of the radius of the inscribed circle is realized at each point on the middle arc.Finally it designs the user interaction interface,reserves a partial adjustment window,realizes the partial adjustment of the generated curve,and ensures the quality of the pre-formed line.Experiments show that the system can quickly generate blade pre-forging profiles according to actual engineering needs,which greatly improves design efficiency.