中型、重型冷压和热锻用压床,由于受制造、运输等条件限制,往往采用组合式结构的床身,由床头(上横梁)、立柱和底座三部分组成,其间靠拉紧螺栓连接拉紧。此外,拉紧螺栓还用作加固强度薄弱的床身部分,如在平锻机上。为防止压床在工作载荷下床头、立柱和底座接合面间产生间隙,并保证在工作载荷作用下床头、立柱和底座接合面间有 Medium, heavy cold pressing and hot forging presses, due to manufacturing, transportation and other conditions, often combined modular bed, from the bed (on the beam), column and the base of three parts, by tightening bolts Tension the connection. In addition, tightening bolts are also used to reinforce the weakness of the bed portion, as in a forging machine. In order to prevent the bed under the working load under the bed, column and the base of the gap between the joints, and under the action of the load to ensure that bed, column and base joints have