我国型钢轧机广泛采用半闭式机架,其中的主要构件H瓦座的强度计算,现在广泛采用的理论计算是按固定端处理导出的,本文认为无论从理论上、还是实际上都不合适。因为H瓦座在机架的安装配合不可能达到没有间隙的紧配合。本文从理论分析入手,又考虑了实际情况,认为按可动铰支座进行受力分析和理论计算是合理的。建议采用本文所导出公式计算H瓦座强度。 China’s steel rolling mill widely used semi-closed racks, of which the main component of the H-watt strength calculation, now widely used theoretical calculations are derived by the fixed-end processing, this paper that in theory, or in fact are not suitable. Because the H tile seat in the rack with the fit can not be achieved without a tight fit. Starting from the theoretical analysis, this article also considers the actual situation, and considers that the analysis of forces and the theoretical calculation based on the movable hinge support are reasonable. It is recommended to use the formula derived in this paper to calculate the strength of H tile seat.