随着航空工业的发展,对金属材料的要求越来越高,金属材料的疲劳试验日益增加,其作用也日益重要。因为它是飞机设计制造、使用寿命方面一系列技术理论的重要依据之一。但要取得准确的疲劳试验数据,在很大程度上取决于试样的型面精度(见图1)能否达到图纸资料要求。 With the development of the aviation industry, the requirements for metal materials are getting higher and higher, and the fatigue tests of metal materials are increasing day by day. Its role is also increasingly important. Because it is one of the important bases of a series of technical theories in aircraft design and manufacture and service life. But to obtain accurate fatigue test data, to a large extent depends on the sample surface accuracy (see Figure 1) can meet the drawings and materials requirements.