现用的单冲头平底座式楔块扩孔方法,省力范围较小,不可能扩制大型护环,而且操作繁杂生产效率低。本文阐明的外锥面楔扩、双锥面楔扩新技术改善了大护环机械式扩孔工艺。文中纪录了楔扩模拟实验参数,进行了理论分析,并以60万千瓦护环为例做了设计计算和有关力能参数的对比。 The existing single-punch flat-base wedge reaming method, a smaller range of labor-saving, it is impossible to expand the large retaining ring, and complicated operation of low production efficiency. This article illustrates the outer cone wedge expansion, double cone wedge expansion technology to improve the mechanical large reaming mechanical reaming process. In this paper, the wedge expansion simulation experimental parameters were recorded, and the theoretical analysis was carried out. The comparison between the design calculation and the relevant energy parameters was done by taking the 600,000-kilowatt guard ring as an example.