机床的精度稳定性是影响机床的质量指标,高精度精密机床是否具有可用性,很大程度上取决于基础铸件能否长期保持其精度。 为了提高机床的刚度和减少变形,选用更高牌号的铸铁和采用簿壁复杂结构,已成为机床铸件发展的共同趋势。然而,这往往又会导致铸造应力增大和铸造性能恶化,因 The precision stability of the machine tool is the quality index of the machine tool. Whether the high precision precision machine tool is available or not depends largely on whether the base casting can maintain its accuracy for a long time. In order to improve the rigidity of the machine tool and reduce the deformation, the selection of higher grades of cast iron and the use of complex book wall structure has become a common trend in the development of machine tool castings. However, this often leads to an increase in casting stress and a deterioration in casting performance