公开(公告)号：EP1083025A3

公开(公告)日：2003-01-22

申请号：EP00119336.6

申请日：2000-09-07

申请人： Mori Seiki Co., Ltd. ,  Kakino, Yoshiaki ,  Yasda Precision Tools K.K. ,  Osaka Kiko Co., Ltd. ,  Yamazaki Mazak Corporation ,  MITSUBISHI DENKI KABUSHIKI KAISHA

发明人： Kakino, Yoshiaki ,  Fujishima, Makoto ,  Otsubo, Hisashi, c/o Yasda Precision Tools K.K. ,  Nakagawa, Hideo ,  Yamaoka, Yoshinori, c/o Yamazaki Mazak Corp. ,  Takeshita, Torao

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

CPC分类号： G05B19/404 ,  B23Q17/0961 ,  G05B2219/41376 ,  G05B2219/42289 ,  G05B2219/50276 ,  Y10T408/14

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。

公开(公告)号：EP1083469A3

公开(公告)日：2002-04-24

申请号：EP00119335.8

申请日：2000-09-07

申请人： Mori Seiki Co., Ltd. ,  Kakino, Yoshiaki ,  Yasda Precision Tools K.K. ,  Osaka Kiko Co., Ltd. ,  Yamazaki Mazak Corporation ,  MITSUBISHI DENKI KABUSHIKI KAISHA

发明人： Kakino, Yoshiaki ,  Fujishima, Makoto, c/o Mori Seiki Co., Ltd. ,  Otsubo, Hisashi, c/o Yasda Precision Tools K.K. ,  Nakagawa, Hideo, c/o Osaka Kiko Co., Ltd. ,  Yamaoka, Yoshinori, c/o Yamazaki Mazak Corp. ,  Takeshita, Torao, c/o Mitsubishi Denki K.K.

IPC分类号： G05B19/18

CPC分类号： G05B19/4166 ,  G05B2219/42073 ,  G05B2219/50107

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.