一、问题的提出近十多年来,随着航空技术的发展,国内外对中小型发动机逐渐引起重视,其设计和工艺技术不断进步。中小型发动机的一个重要特征是整体叶轮。所谓整体叶轮就是指把数十个叶片直接与盘或内外环构成一体。它具有结构简单,尺寸紧凑,并因省掉叶片与盘的装配误差而使精度提高,可以减小发动机的尺寸和减轻其重量。但是,这些整体叶轮的型面复杂,精度要求高,截面变化大,通道狭窄,叶型薄,材料切削性能差,而且大多数毛坯都是锻造的 First, the issue put forward Over the past decade, with the development of aviation technology, small and medium sized engines at home and abroad gradually attracted attention, its design and process technology continues to progress. An important feature of small and medium-sized engines is the integral impeller. The so-called overall impeller refers to the dozens of leaves directly with the disk or the inner and outer ring form one. It has a simple structure, compact size, and due to the elimination of blade and disk assembly errors to improve accuracy, can reduce the size of the engine and reduce its weight. However, these integral impellers have complex profiles, high precision requirements, large cross-sectional variations, narrow passages, thin leaf profiles, poor material cutting performance, and most of the blanks are forged