Numerical control apparatus for nc machine tool
    1.
    发明公开
    Numerical control apparatus for nc machine tool 有权
    数值计算器

    公开(公告)号:EP1083023A2

    公开(公告)日:2001-03-14

    申请号:EP00119366.3

    申请日:2000-09-08

    IPC分类号: B23Q15/007

    摘要: A numerical control apparatus (1 or 20) judging an overload on the basis of a specified reference value without any affection of a wear and abrasion of a tool, executing a pecking process even in machining wherein a feed rate changes every moment. In the numerical control apparatus (1 or 20) comprising pecking operation controlling means (12) which make a feed drive system (14) retracted when a cutting load detected by cutting load detecting means (7) exceeds a reference value during a drilling process, the cutting load detecting means (7) comprise a bite load detecting section (8) to detect the cutting load at a biting stage wherein a tool bites a work piece, and a stationary load detecting section (10) to detect the cutting load after the biting stage. The numerical control apparatus (1 or 20) comprises pecking judgement means (11) to judge that the feed drive system (14) should be retracted when a fluctuation load exceeds a specified reference value wherein the fluctuation load is obtained by reducing the bite load from the detected stationary load. When it is judged that the feed drive system (14) should be retracted, the pecking operation controlling means (12) make the feed drive system (14) retracted.

    摘要翻译: 一种数值控制装置(1或20),其基于指定的参考值判断过载,而不影响工具的磨损,即使在每次进给速率变化的加工中也执行啄钻过程。 在由在切削加载检测机构(7)检测出的切削负荷在钻削过程中超过基准值时,使进给驱动系统(14)缩回的啄击运转控制机构(12)的数控装置(1或20) 切割负荷检测装置(7)包括咬入负载检测部(8),用于检测在工具咬住工件的咬合阶段的切割负荷;以及固定负载检测部(10),用于检测在 咬人的舞台 数值控制装置(1或20)包括啄食判定装置(11),用于当波动负载超过指定的参考值时,判断进给驱动系统(14)应该缩回,其中通过减小咬合负载获得波动负载 检测到的固定载荷。 当判断进给驱动系统(14)应该缩回时,啄食操作控制装置(12)使进给驱动系统(14)缩回。

    Control method for NC machine tool
    10.
    发明公开
    Control method for NC machine tool 有权
    Steuerungsverfahrenfürnumerisch gesteuerte Werkzeugmaschine

    公开(公告)号:EP1083469A2

    公开(公告)日:2001-03-14

    申请号:EP00119335.8

    申请日:2000-09-07

    IPC分类号: G05B19/18

    摘要: A control method for an NC machine tool is provided which ensures a high precision of the contouring control, and allows for extension of the drill life, and reduction in machining time. The control method comprises: generating an operation command signal on the basis of the machining program and a time constant; generating a velocity command signal by multiplying a deviation of a present position signal fed back from the feed drive system (106) from the generated operation command signal by a position loop gain; generating an electric current command signal by multiplying a deviation of a present velocity signal fed back from the feed drive system (106) from the generated velocity command signal by a velocity loop gain; and controlling a drive motor of the feed drive system (106) on the basis of the generated electric current command signal for driving thereof, wherein a machining mode is determined from the machining program and, if the machining mode is a drilling mode, at least one of the operation command signal, the velocity command signal and the electric current command signal is modified when the feed drive system (106) is driven to be retracted opposite to a drilling feed direction.

    摘要翻译: 提供了一种用于NC机床的控制方法,其确保轮廓控制的高精度,并且允许延长钻头寿命,并减少加工时间。 控制方法包括:基于加工程序产生一个操作命令信号和一个时间常数; 通过将从所述进给驱动系统(106)反馈的当前位置信号与所生成的操作命令信号的偏差乘以位置环增益来产生速度指令信号; 通过将从所述进给驱动系统(106)反馈的当前速度信号与所生成的速度指令信号的偏差乘以速度环增益来产生电流指令信号; 并根据所产生的电流指令信号控制进给驱动系统(106)的驱动电动机,其中,从加工程序确定加工模式,如果加工模式是钻孔模式,至少 当进给驱动系统(106)被驱动以与钻取进给方向相反地缩回时,操作指令信号,速度指令信号和电流指令信号之一被修改。