CAJ | 학술논문

在五轴联动数控机床中,转动轴进给系统的动态精度对轮廓误差的影响是不可忽视的。采用不同空间位置上的外形轮廓,对五轴联动数控机床转动轴的联动运动产生的轮廓误差进行分析。在建立转动轴进给系统模型的基础上,利用刀具位置系统到加工系统的转换得到转动轴指令,通过进给系统动态误差模型得到仿真输出指令,再将输出指令从加工系统转换回刀具位置系统,比较刀具位置的偏差,从而得到轮廓误差。找出轮廓误差点与外形轮廓空间位置之间的对应关系,利用这种关系可快速通过轮廓误差来考察转动轴进给系统的动态性能,为机床快速调整和维修提供一种手段。
재오축련동수공궤상중,전동축진급계통적동태정도대륜곽오차적영향시불가홀시적。채용불동공간위치상적외형륜곽,대오축련동수공궤상전동축적련동운동산생적륜곽오차진행분석。재건립전동축진급계통모형적기출상,이용도구위치계통도가공계통적전환득도전동축지령,통과진급계통동태오차모형득도방진수출지령,재장수출지령종가공계통전환회도구위치계통,비교도구위치적편차,종이득도륜곽오차。조출륜곽오차점여외형륜곽공간위치지간적대응관계,이용저충관계가쾌속통과륜곽오차래고찰전동축진급계통적동태성능,위궤상쾌속조정화유수제공일충수단。
As one axis of five--axis CNC machines, rotary axis servo system dynamic performance impacts heavier on the contour accuracy than that of linear axes and has to be treated carefully. Herein,the servo system model of axis rotation was established firstly. The rotation axis commands were formed based on the conversion system from the tool position to processing system, the output in- structions were related to the servo system dynamic error model, and then the output instructions from the processing system were converted back to the tool position system. The deviation was given from comparing the position of the tool with the designing surface and the contour errors were shown. A series of points on the contour were selected to calculate the errors from the joint motion of rotation axis in the five--axis CNC machine, The relation between the points with biggest departure and the geometric characteristics were analyzed. It may be used to evaluate the dynamic errors from rotation axis rapidly for adjustment and maintenance of CNC machines.