【作者】 王开全；

【导师】 任运来； 高新；

【作者基本信息】 燕山大学 ， 材料加工工程， 2004， 硕士

【摘要】 汽轮机叶片是汽轮机的核心零部件，起能量转换的关键作用。由于使用环境和性能的要求，以及制造成本方面的考虑，越来越多的厂家采用了精锻的生产工艺。本文针对叶片精锻工艺设计的实际要求，在总结了工厂经验的基础上，以Unigraphics（NX）为开发平台，应用参数化的思想，对叶片精锻模具CAD二次开发做了系统的研究。另外，采用Msc.SuperForm软件，对叶片锻造过程进行了模拟优化。主要内容如下：分析了叶片锻造模具设计中平衡角的确定方法；在工厂实际操作基础上，总结出四种精锻叶片型线修整方法及四种模锻叶片型线修整的方法，对叶根进行了分类，给出叶根设计计算的过程。针对叶片锻件设计中的型线修整各种方法，在UG平台上应用UG的通用开发语言UG Open/GRIP，采用参数化的思想开发了型线修整GRIP程序。应用用户自定义特征（UDF）的方法，结合草图、参数化及表达式技术，建立了叶根库；应用部件家族（Part family）及电子表格的技术，建立了模块库及常用零件库；应用API开发语言MenuScript，为系统编写了菜单。以叶片成形作平面变形问题，利用商用有限元软件Msc.SuperForm对叶片成形作了有限元模拟，分析了能量预选对螺旋压力机精锻叶片的影响；采用不同形式的预成形毛坯，对预成形对叶片精密锻造的影响做了分析，得出不同形式坯料的成形规律，分析了各种形式坯料成形的优缺点；总结了叶片精锻成形的流动规律。更多还原

【Abstract】 Turbine blades are core components in turbine, which play important roles in energy transformation. More and more manufacturer apply precision forging to the produce of blade, due to the special working environment and properties needed of blade, as well as the advantage of cost in precision forging compared with conventional forging. According to the needs of factory, applying parametric method, special development of CAD for the blade precision forging die is systematically studied on the basis of UG(NX) in this thesis after summing up the expertise of factory. The main content is as below:The methods of definition the equilibrium angle in forging die design have been analyzed. Four sorts of airfoil section trimming methods of precision and average forging have been summed up on the basis of factory. The blade roots have been categorized and their design process were given.According to the key difficult, section curve trimming, in forging design, a procedure was developed adopting developing language -UG Open/GRIP. This procedure can reduce the blade forging design period and bring convenience to the user.Using UDF method and other technique of UG including sketcher, expression, a blade root warehouse was established. A die block warehouse and frequent using part warehouse was established as well applying Part family and Spreadsheet technique. System menus were developed by using MenuScript, a sort of API developing language.Assuming the deformation of blade in forging was a plane deformation problem, FEM simulation was performed using commercially available FEM software package-Msc.SuperForm. Studies on the influence of energy of screw press on precision forging of blade. Analysis of different sort of billet’s merits and demerits in blade forming was performed and the forming rule was obtained.更多还原