在轴承环锻造的生产中,大、中型轴承的套圈多采用锤、平锻机和压力机成形工艺和扩孔机辗扩工艺联合的生产方式。实践证明,成型工艺生产的环坯的外形愈合理,尺寸精度愈高,辗扩后的环形锻件的尺寸精度和合格率也愈高。近年来国内外已经开始采用液压闭式冲挤新工艺,为扩孔机辗扩工艺提供了尺寸精确的环坯。下面就介绍一下这种新工艺。 In the production of bearing ring forging, large and medium-sized bearing rings and more use of hammer, flat forging machine and press forming process and reaming process rolling joint production methods. Practice has proved that the shape of the billet produced by the forming process is more reasonable and the higher the dimensional accuracy, the higher the dimensional accuracy and pass rate of the annular forgings after rolling. In recent years, hydraulic closed punching at home and abroad have begun to use new technology for reaming machine rolling technology provides a precision ring blank. Here’s to introduce this new technology.