Abstract: In the processing of high-speed machining of continuous short-segments tool path,overlapping corner profile often contours due to the sharp corners are within close vicinity.A new kinematic smoothing algorithm was proposed to achieve high-speed smoothing transition.For overlapping corner transition paths in consecutive short segments,the overlapping parts were eliminated by stitching the midpoints of two adjacent transition profiles.By taking the motion limit of the drive and contour error as the boundary conditions,and combined with the jounce to constrain the acceleration change,the optimal corner transfer speed of the short-segment was derived.The machining time was reduced by 10%,and the acceleration curve reached G1 when the continuous short-segments tool path composed of overlapping corners was processed by experimentally comparing with traditional point-to-point interpolation algorithm,and the processing quality was improved effectively.

Key words: high-speed machining, short-segments, overlapping corner, jounce

摘要： 针对连续短线段高速加工过程中,存在由于相邻拐角距离较短,拐角转接轮廓重叠的问题,提出能够实现高速平滑转接的运动学方法。对连续短线段中的重叠拐角转接路径,采用缝合前后两个过渡轮廓中点的方式消除重合部分,并以驱动器的运动极限和轮廓误差为边界条件,结合跳度约束加速度变化,推导出转接过程中的最佳拐角转接速度。通过实验对比传统点对点插补算法验证分析,所提算法在加工包含重叠拐角的连续短线段刀具路径时,加速度曲线满足G1连续,加工时间减少10%,加工效率明显提高。

关键词: 高速加工, 短线段, 重叠拐角, 跳度