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为在镗削时提高被加工孔的轴线直线度的精度,给出了拖板运动直线度误差和刀具回转轴线运动误差之间的关系,并研制利用激光测量装置在线同时测量拖板运动不直线度五个误差分量△Z,△Y,α,β,γ。利用动态数据系统(D.D.S.)处理方法对所得的数据进行系统建模,得到该动态系统最佳模型——四阶自回为模型AR(4)。利用微处理机对加工直线度误差进行向前一步予报及补偿控制,模拟实验结果表明在340毫米长度上镗孔轴线直线度误差在Y,Z两方向上分别从8微米和15微米缩减到2微米和9微米,校正效果显著。该方法可用于计算机数字控制机床及加工中心。
In order to improve the accuracy of the straightness of the machined hole in boring, the relationship between the linear motion error of the carriage and the movement error of the rotary axis of the tool is given. The measurement of the motion of the carriage is not straight at the same time by using the laser measuring device Degree of five error components △ Z, △ Y, α, β, γ. The data of the system are systematically modeled by using the D.D.S. processing method, and the best model of the dynamic system is obtained - the fourth order self-reckoning is the model AR (4). The use of a microprocessor to process the straightness error to a prior report and compensation control, simulation results show that the length of 340 mm boring axis straightness error in the Y and Z directions, respectively, from 8 microns and 15 microns reduced to 2 microns and 9 microns, the correction effect is significant. The method can be used in computer numerical control machine tools and machining centers.