大型铣床横梁模态分析及装配改进方法研究

Research on large milling beam modal analysis and improved assembling

大型数控铣床由于横梁在导轨面承受溜板箱、滑枕等零部件重量及自重情况下产生的装配尺寸变形而造成的精度达不到标准。使用有限元分析软件ANSYS对数控动梁龙门镗铣床的横梁进行模态分析,依据横梁自重和溜板箱、滑枕等零部件重量发生的相对变形幅值,以及龙门镗铣床的加工特点和机床总体设计的结构特点。提出了在横梁装配中需要注意的几点事项和一些解决装配尺寸要求的方法,通过有限元分析其变形量并于实际测量值进行对比,证明实验的数据对现场装配的解决方法具有很好的理论支持。

For the assembly size accuracy cannot be up to the standard caused by deformation of large CNC boring machine beam caused by the weight of slideway,apron,ram and other parts,use the finite element analysis software ANSYS for the modal analysis of gantry CNC boring-milling machine beam.Based on the relative deformation caused by beam,apron,ram and other parts weight,the processing characteristics of gantry,boring-milling machine,the overall structure design of the machine tool,some matters needed attention in the beam assembly and some methods to solve the assembly size requirements are proposed.Through the finite element analysis of the deformation and compared with the actual measured value,the experiment data has a very good theoretical support for field assembly solution.