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复杂曲面慢刀伺服加工刀具半径补偿算法

周玮 康敏 郭航言

周玮,康敏,郭航言. 复杂曲面慢刀伺服加工刀具半径补偿算法[J]. 机械科学与技术,2023,42(5):736-746 doi: 10.13433/j.cnki.1003-8728.20220018
引用本文: 周玮,康敏,郭航言. 复杂曲面慢刀伺服加工刀具半径补偿算法[J]. 机械科学与技术,2023,42(5):736-746 doi: 10.13433/j.cnki.1003-8728.20220018
ZHOU Wei, KANG Min, GUO Hangyan. Tool Radius Compensation Algorithm for Slow Tool Servo Turning on Complex Surface[J]. Mechanical Science and Technology for Aerospace Engineering, 2023, 42(5): 736-746. doi: 10.13433/j.cnki.1003-8728.20220018
Citation: ZHOU Wei, KANG Min, GUO Hangyan. Tool Radius Compensation Algorithm for Slow Tool Servo Turning on Complex Surface[J]. Mechanical Science and Technology for Aerospace Engineering, 2023, 42(5): 736-746. doi: 10.13433/j.cnki.1003-8728.20220018

复杂曲面慢刀伺服加工刀具半径补偿算法

doi: 10.13433/j.cnki.1003-8728.20220018
基金项目: 江苏省研究生科研与实践创新计划(KYCX19_0607)
详细信息
    作者简介:

    周玮(1996−),硕士研究生,研究方向为数控加工技术,1506036510@qq.com

    通讯作者:

    康敏,教授,博士生导师,博士,kangmin@njau.edu.cn

  • 中图分类号: TH164

Tool Radius Compensation Algorithm for Slow Tool Servo Turning on Complex Surface

  • 摘要: 为提高复杂曲面元件的面形加工精度,进行了慢刀伺服车削刀具路径规划,研究了刀具半径补偿算法。本文通过分析法向补偿算法和Z向补偿算法的不足,提出一种基于弦长垂线的刀具补偿算法,以环曲面为例进行仿真、车削加工验证该算法的可行性。仿真结果表明弦长垂线刀具补偿算法下所求刀位点精度较高,可实现X轴匀速运动。试验结果表明弦长垂线刀具补偿算法下面形加工精度优于法向补偿算法和Z向补偿算法,表面粗糙度受刀具补偿算法影响较小。
  • 图  1  慢刀伺服数控机床结构示意图

    图  2  刀具补偿流程图

    图  3  刀具圆弧半径补偿原理图

    图  4  Lc与插值误差关系图

    图  5  弦长垂线刀具补偿原理图

    图  6  刀触点生成算法离散误差

    图  7  环曲面三维示意图

    图  8  环曲面理论面形及刀触点轨迹分布

    图  9  等参数下两种算法下Lc分布范围

    图  10  等参数下两种算法下Lc分布范围

    图  11  等参数下两种算法下面形精度

    图  12  环曲面刀具路径仿真

    图  13  复杂曲面实际加工示意图

    图  14  两种算法下面形精度图

    图  15  弦长垂线补偿算法下环曲面表面粗糙度

    表  1  仿真参数表

    参数名参数值
    离散角Δθ
    刀具圆弧半径Rt 0.5 mm
    每圈进给量af 0.5 mm/r
    两相邻点运动时间ΔT 6 ms
    切削深度ap 0.1 mm
    工件半径Rg 20 mm
    环曲面正交弧半径R 140 mm
    环曲面基弧半径a 100 mm
    下载: 导出CSV

    表  2  三坐标测量机设备参数表

    测量方式示值误差/μm探测误/μm环境温度/℃
    点触发式2.7 + L/2502.720 ± 2
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-04-19
  • 网络出版日期:  2023-05-29
  • 刊出日期:  2023-05-25

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