摘要
经典的组合结构压机机架的预紧设计方法以横梁为刚体和拉杆立柱只有轴向变形为假设条件,给出的预紧设计方法与真实情况不相符合。为了使100 MN液压机安装完成后不产生偏载,对组合框架预紧式液压机装配预紧力分配规律进行了研究,得到了100 MN液压机拉杆的预紧力大小和递减规律。根据材料力学、有限元和实验分析的结果,实现了液压机安装完毕后上横梁不倾斜而只有竖直方向向下位移的目的。
The classical preload design method of combinational frame of hydraulic presses is based on the assumption that the beams of the frame are rigid and the column of tie rod has only axial deformation,which is not agreed with practice. In order to eliminate the unbalance load of a 100 MN hydraulic press after installation,the distribution law in prestressing in instalation of the combinational frame was researched,and the tie rod preloads and degression law of preloading were obtained. According to the results of material mechanics,finite element and experimental analysis,the aim of the installed hydraulic press was implemented that the upper beams are not unblanced,and are only moved vertically.
出处
《机床与液压》
北大核心
2016年第1期59-63,共5页
Machine Tool & Hydraulics
基金
天津市自然科学基金资助项目(13JCYBJC17800)
关键词
100
MN精密液压机
偏载
预紧力
分配规律
拉杆
100 MN Precision hydraulic press
Unbalance load
Preload
Distribution law
Tie rod
