20 MN压剪试验机工作台导轨表面隆起形状研究  

Study on Surface Uplift Shape of Guide Rail of 20 MN Compression Shear Testing Machine

作　　者：李延民[1] 孙文斌 王栋[1] 尹泽涵 LI Yanmin;SUN Wenbin;WANG Dong;YIN Zehan(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou Henan 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,河南郑州450001

出　　处：《机床与液压》2024年第21期173-177,共5页Machine Tool & Hydraulics

基　　金：2022年度河南省重点研发专项项目(221111220600)。

摘　　要：20 MN压剪试验机进行压剪试验时,由于工作台承受偏心加载,导致其下方的滚动导轨块受力不均,使滚动导轨块出现低周疲劳破坏。同时,这种不均匀力还导致工作台产生不均匀变形,影响工作台寿命及检测精度。为解决上述问题,对工作台在压剪条件下的载荷情况进行分析,并对工作台进行静态仿真。通过提取导轨面上变形数据,进行多项式拟合,提出导轨隆起曲面结构,分析得到优化曲面,有效提高了滚动导轨块受力均匀性,减小了工作台变形,为工作台导轨的设计与改善提供了有力支撑。When the 20 MN compression shear testing machine performs compression shear test,due to the eccentric loading of the workbench,the force of the rolling guide block under it is uneven,which causes the low cycle fatigue failure of the rolling guide block.At the same time,non-uniform force also causes the workbench to produce uneven deformation,which affects the life and detection accuracy of the workbench.In order to solve the above problems,the load of the workbench under the condition of compression and shear was analyzed,and the static simulation of the workbench was carried out.The deformation data on the guide rail surface was extracted,and the polynomial fitting was carried out,the structure of the guide rail uplift surface was proposed,and the optimized surface was obtained by analysis,which effectively improved the force uniformity of the rolling guide rail block,reduced the deformation of the workbench,and providing a strong support for the design and improvement of the guide rail of the workbench.

关 键 词：压剪试验机 导轨表面隆起 滚动导轨块 有限元分析 

分 类 号：TH242[机械工程—机械制造及自动化]