李宏坤   

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Language:English

Paper Publications

Title of Paper:复杂曲面加工过程中铣刀在线监测方法

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Date of Publication:2018-08-15

Journal:振动、测试与诊断

Volume:38

Issue:4

Page Number:658-665

ISSN No.:1004-6801

Key Words:叶轮加工;时域同步平均;累积量;在线监测

Abstract:在验证了铣削力与刀柄摆动电涡流位移信号之间存在线性关系的基础上,以机床主轴端部x,y方向的加速度信号二次频域积分结果作为刀柄摆动位移信号,提取积分位移信号的基频及其谐波信号作为监测信号,解决了电涡流位移传感器安装不便的问题,同时有效去除了干扰信号的影响.利用时域同步平均(time synchronous averaging,简称TSA)计算监测信号的一阶和二阶累积量,结合时域指标方差、偏斜度、峭度、绝对均值及有效值定量刻画累积量波形,通过设定阈值实现状态预警,较好地解决了复杂曲面加工过程中铣刀状态在线监测与预警的难题.

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