CAJ | 학술논문

研究了5坐标数控加工中刀轴矢量规划问题,分析了现有刀轴矢量生成方法的缺点,借鉴动画制作中设置关键帧的思想,提出了一种新的全局过渡光滑的刀轴矢量生成方法.首先根据加工零件的几何特征,在满足不发生碰撞干涉的前提下,设置一些关键刀轴矢量,然后采用样条函数对这些刀轴矢量进行插值.在生成刀位文件的过程中,通过将曲面上的参数与样条函数的自变量进行某种映射,从而得到样条函数值,并以此值作为刀位点的刀轴矢量.加工实例表明,该方法实现了全局刀轴矢量的光滑过渡,实现了转动速度以及加速度的连续.该方法能够避免因刀轴矢量突变而引起的机床震动,提高了零件的加工质量.
연구료5좌표수공가공중도축시량규화문제,분석료현유도축시량생성방법적결점,차감동화제작중설치관건정적사상,제출료일충신적전국과도광활적도축시량생성방법.수선근거가공령건적궤하특정,재만족불발생팽당간섭적전제하,설치일사관건도축시량,연후채용양조함수대저사도축시량진행삽치.재생성도위문건적과정중,통과장곡면상적삼수여양조함수적자변량진행모충영사,종이득도양조함수치,병이차치작위도위점적도축시량.가공실례표명,해방법실현료전국도축시량적광활과도,실현료전동속도이급가속도적련속.해방법능구피면인도축시량돌변이인기적궤상진동,제고료령건적가공질량.
The planning method of tool orientation in the five-axis NC machining is studied. The problem of the existing method is analyzed and a new method for generating the global smoothing tool orientation is proposed by introducing the key frame idea in the animation-making. According to the feature of the part, several key tool orientations are set without interference between the tool and the part. Then, these key tool orientations are interpolated by the spline function. By mapping the surface parameter to the spline parameter, the spline function value is obtained and taken as the tool orientation when generating the CL file. The machining result shows that the proposed method realizes the global smoothing of the tool orientation and the continuity of the rotational speed and the rotational acceleration. It also avoids the shake of the machine tool and improves the machining quality.