数控车削中心整机静力学特性研究
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摘要
数控机床在外载荷作用下的变形直接影响机床的加工精度,对数控车削中心进行了静刚度检测试验,多点测量获取了机床各测点在外载荷作用下的变形。静刚度试验为评价机床静刚度提供数据,并为改进预测及方案修改方法提供试验手段。同时,建立机床三维模型并利用有限元分析软件对数控车削中心实施模拟实际加工加载状态的静力学分析,分析机床各处的变形状况。对试验和有限元分析的结果进行对比,分析解析值与试验测量值之间存在误差的原因,为进一步机床结构方案改进设计提供理论和试验依据。
The deformation of the CNC machine tool under the load directly affects the machining accuracy of the machine tool,The test of static stiffness of turning center is carried out, and the multipoint measurement is used to obtain the deformation of the measuring points of the machine tool under the external load. The static stiffness experiment provides data for evaluating the static stiffness of machine tools, and provides experimental means for improving the method of prediction and scheme modification. At the same time, the 3 D model of machine tool is established. The static analysis of the actual loading state is carried out by using the finite element analysis software, and the deformation state of the machine tool is analyzed. The results of experiment and finite element analysis are compared, and the reason for the error between the analytical value and the experimental value is analyzed, which provides a theoretical and experimental basis for further improvement of machine tool structure plan.
The deformation of the CNC machine tool under the load directly affects the machining accuracy of the machine tool,The test of static stiffness of turning center is carried out, and the multipoint measurement is used to obtain the deformation of the measuring points of the machine tool under the external load. The static stiffness experiment provides data for evaluating the static stiffness of machine tools, and provides experimental means for improving the method of prediction and scheme modification. At the same time, the 3 D model of machine tool is established. The static analysis of the actual loading state is carried out by using the finite element analysis software, and the deformation state of the machine tool is analyzed. The results of experiment and finite element analysis are compared, and the reason for the error between the analytical value and the experimental value is analyzed, which provides a theoretical and experimental basis for further improvement of machine tool structure plan.
引文
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[2]惠烨,黄玉美,李艳.车削中心自动变位全载荷加载装置设计及试验研究[J].机械强度,2015,37(5):839-844.
[3]张耀娟,杨克,王江.五轴联动数控磨床旋转进给机构静力学分析[J].机床与液压,2016,44(19):138-141
[4]王禹林,廖凯,金娜.主轴箱动/静/热态特性综合分析与优化[J].南京理工大学学报,2013,37(1):87-93.
[5]金涛,彭晓辉,赵万华.基于结合面的车铣复合加工中心有限元建模[J].组合机床与自动化加工技术,2011,(9):77-80.
[6]刘悦,汪劲松.基于轴承及导轨接触刚度的混联机床静刚度研究及优化[J].机械工程学报,2007,43(9):151-154.
[7]刘悦,王立平.混联机床的静刚度实验测量[J].机械强度,2009,31(6):1029-1032.
[8]纪海峰.基于ABAQUS的数控车床床身有限元分析及结构优化设计[J].机械设计与制造工程,2016,45(4):20-23.
[9]孔令叶.数控机床整机静刚度仿真分析及结构优化[J].工具技术,2016,50(5):37-40.
[10]沈晓健,李开明,张志英,等.并联式铣床立柱静刚度分析及结构优化[J].机械制造与自动化,2016,45(2):13-17.
[11]惠烨,李艳.数控车削中心主轴箱静刚度分析及研究[J].陕西科技大学学报,2014,32(3):123-126.