车削变形参数的回归分析解法

在车削加工时,工件在切削力和夹具夹紧力的作用下会产生变形,变形量的大小直接影响工件的加工精度,在径向刚度较差的工件中表现得尤其明显.因此在车削批生产中合理选择其加工参数和夹紧力的大小对提高加工精度和加工效率有着重要的意义.采用数值回归分析方法可求得车削加工变形公式中的部分参数,对实际工件的批量加工有着重要的指导意义.

基于ANSYS车削薄壁焊接筒件内环面变形分析

基于有限元ANSYS法,对车削薄壁焊接筒件内孔环面过程中产生的变形进行分析,通过改变不同的加工条件,对环面的非焊缝处和焊缝处施加集中三向载荷,得到最大变形量和最大应力的数据,通过数据分析变化规律,从而得出对实际生产起指导作用的建议。

遗传算法优化设计在切削加工中的应用

优化设计是现代设计方法的重要组成部分,遗传算法是优化设计方法之一.根据薄壁铝合金件的加工变形量的经验公式,通过有限元分析软件Ansys 10.0对其变形量进行仿真,得出零件在不同加工参数下的变形量;再由优化设计中的遗传算法,用MATLAB7.0工具箱中的程序编程,得出在最小变形量时所需的加工参数和夹紧力,其对产品的生产加工有着现实的指导意义.

细长轴数控车床径向进给系统和刀台一体化设计

从力学角度分析细长轴类零件车削加工变形原因,提出细长轴数控车床径向进给系统和刀台一体化设计方案,解决由于机床结构的原因所造成的细长轴类零件车削加工变形问题。

Simulation and experiment analysis on thermal deformation of tool system in single-point diamond turning of aluminum alloy

The aim of this work is to simulate thermal deformation of tool system and investigate the influence of cutting parameters on it in single-point diamond turning(SPDT) of aluminum alloy. The experiments with various cutting parameters were conducted. Cutting temperature was measured by FLIR A315 infrared thermal imager. Tool wear was measured by scanning electron microscope(SEM). The numerical model of heat flux considering tool wear generated in cutting zone was established. Then two-step finite element method(FEM) simulations matching the experimental conditions were carried out to simulate the thermal deformation. In addition, the tests of deformation of tool system were performed to verify previous simulation results. And then the influence of cutting parameters on thermal deformation was investigated. The results show that the temperature and thermal deformation from simulations agree well with the results from experiments in the same conditions. The maximum thermal deformation of tool reaches to 7 μm. The average flank wear width and cutting speed are the dominant factors affecting thermal deformation, and the effective way to decrease the thermal deformation of tool is to control the tool wear and the cutting speed.