CAJ | 학술논문

为了减小机床振动，提高连续小线段加工速度，提出了一种基于S型加减速的前看插补算法。采用五次多项式速度曲线，可以实现加速度和跃度的连续变化。首先根据NC代码的目标进给速度、机床动力性能和微段几何特征预求速度约束，然后反向扫描求解满足减速要求的速度约束，最后根据线段长度规划出约束之下的速度曲线，发送至位控模块进行实时运动控制。集成到三轴数控试验平台上试验，算法运行稳定，大大提高衔接速度，仿真结果表明加工时间比传统插补算法缩短了77.31%。
위료감소궤상진동，제고련속소선단가공속도，제출료일충기우S형가감속적전간삽보산법。채용오차다항식속도곡선，가이실현가속도화약도적련속변화。수선근거NC대마적목표진급속도、궤상동력성능화미단궤하특정예구속도약속，연후반향소묘구해만족감속요구적속도약속，최후근거선단장도규화출약속지하적속도곡선，발송지위공모괴진행실시운동공제。집성도삼축수공시험평태상시험，산법운행은정，대대제고함접속도，방진결과표명가공시간비전통삽보산법축단료77.31%。
This paper proposes a interpolation algorithm to reduce vibration and optimize the junction feder-ates between consecutive small line segments. Quintic polynomial is used to ensure the continuities of accel-eration and deceleration. First, the algorithm calculates the initial feedrate constraints according to NC code, machine dynamic performance and geometrical characteristic of the lines. Next, the constraints are recalcula-ted from the end of the preprocessing segments so that the feedrate can decelerate to an expected value. At last, the optimized feederate curve is planed regarding the constrains and the lengths of the lines, and the re-sults are sent to the real-time position control module. and reduce the cutting time. When integrated into 3-axis CNC system, simulations indicate that the method can greatly increase the jounction feedrates, and re-duce the cutting time by 77. 31% compared to the conventional methods.