公开(公告)号：US20020146296A1

公开(公告)日：2002-10-10

申请号：US10082921

申请日：2002-02-26

Applicant: National Institute of Standards and Technology

Inventor： Tony L. Schmitz ,  Matthew A. Davies

IPC: B23C009/00

CPC classification number: B23Q17/0976 ,  G05B2219/37433 ,  G05B2219/37573 ,  G05B2219/37605 ,  G05B2219/45145 ,  Y10T82/10 ,  Y10T82/2595 ,  Y10T409/303752 ,  Y10T409/304312

Abstract: In milling operations, periodically sensed vibration signals synchronous with tool revolution enables a determination of whether the tool returns to approximately the same position each revolution. If so, stability is indicated by tightly grouped values of the periodically sensed vibration signal. If the tool does not return to the same position, spread in the value of the periodically sampled vibration signals is produced thereby indicating chatter conditions. Variance values may be calculated and displayed; histograms may be produced and displayed; corrective action, if needed, may be taken in response to the variance values and/or histogram. Nominal (or commanded) spindle speed, while not necessarily exactly synchronous with actual tool rotation, is entirely adequate to trigger samples and achieve clear indication of the presence or absence of chatter.

Abstract translation: 在铣削操作中，与刀具转速同步的周期性检测的振动信号能够确定刀具是否每转一次返回大致相同的位置。 如果是这样，则通过周期性检测的振动信号的紧密分组的值来指示稳定性。 如果工具不返回相同的位置，则产生周期性采样的振动信号的值的扩展，从而指示颤振条件。 可以计算和显示方差值; 可以生成和显示直方图; 如果需要，可以响应于方差值和/或直方图来采取校正动作。 标称（或指令）的主轴转速，而不一定与实际的刀具旋转精确同步，完全足以触发样品并获得有无颤动的明确指示。