一、叶片毛坯的精化提高叶片毛坯精度,减少加工余量,是一个发展方向。但必须研究精度提高到什么程度,余量减到多少在技术上是可行的,在经济上是合理的。叶片毛坯的材料种类很多,尺寸范围变化很大,必须根椐不同情况提出不同的精度要求。不论什么叶片毛坯统统要求完全无 First, the refinement of the blanks to improve the blade blank precision, reduce machining allowance is a development direction. However, it is necessary to study to what extent the accuracy is increased. It is technologically feasible to reduce the margin, which is economically justified. Leaf blanks of many types of materials, the size range varies widely, different conditions must be based on different accuracy requirements. No matter what the blank leaves all completely required