Abnormality detection apparatus for a tool and numerical control apparatus provided with same
    1.
    发明公开
    Abnormality detection apparatus for a tool and numerical control apparatus provided with same 有权
    异常用于工具和数值控制装置,其装备有这种检测装置

    公开(公告)号:EP1083025A2

    公开(公告)日:2001-03-14

    申请号:EP00119336.6

    申请日:2000-09-07

    IPC分类号: B23Q17/09 B23Q15/16 G05B19/18

    摘要: An abnormality detection apparatus for a tool (11) is described for judging abnormalities of a tool by a uniformly set threshold value in relation to a cutting load even in a machining process wherein a feed rate changes every moment. The abnormality detection apparatus for a tool (10 or 21) comprises cutting load detecting means (8) to detect a cutting load on the basis of an electric current for driving that is output to a feed drive system (14) and/or an electric current for driving that is output to a spindle drive system (15), feed load estimating means (12) to estimate a feed load according to the feed rate wherein the feed load depends on the feed rate, tool load detecting means (11) to pick out a load component depending on the tool by reducing the feed load data estimated by the feed load estimating means (12) from the cutting load data detected by the cutting load detecting means (8), and abnormality judging means (13) to judge whether the tool is in an abnormal condition or not on the basis of the load data picked out by the tool load detecting means (11). The abnormalities of the tool can be judged by the uniformly set threshold value on the basis of the tool load wherefrom the feed load that fluctuates upon the feed rate has been removed.

    摘要翻译: 用于工具(11)的异常检测装置,描述了一种用于即使在加工过程worin的进料速率每时每刻都在变化相对于由统一地设置阈值判定的工具的异常的切削负荷。 用于工具(10或21)所述的异常检测装置包括切削负荷检测装置(8),以检测用于驱动的​​电流的基础上的切削负荷确实是输出到进给驱动系统(14)和/或电 电流用于驱动没有被输出到锭子驱动系统(15),进料负荷估计装置(12)来估计进料负载雅丁到进料速率worin进料负载依赖于速率进料,工具负荷检测装置(11),以 通过减少从由切割负载检测装置检测的切削载荷数据供给负荷估计装置(12)估计进料负载数据挑选出一个负载部件根据工具(8),以及异常判定装置(13)判断 该工具是否处于异常状态或不负载的数据的基础上由刀具载荷检测手段(11)挑选出来。 该工具的异常可通过工具从那里负荷进给负荷变动时那样进料速率已被除去的基础上的一致设定的阈值来判断。

    Numerical control apparatus for nc machine tool
    2.
    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。