Tool damage prevention system
    1.
    发明授权
    Tool damage prevention system 失效
    刀具损坏预防系统

    公开(公告)号:US5587915A

    公开(公告)日:1996-12-24

    申请号:US360780

    申请日:1994-12-29

    申请人: Takashi Nagatomi

    发明人: Takashi Nagatomi

    摘要: A tool damage prevention system is provided which can easily detect an abnormal load with high accuracy to reliably prevent damage to a tool, and which also can appropriately cope with abnormality even if tool damage or the like has already occurred. A first disturbance torque estimating device estimates a disturbance torque Ys acting on a spindle motor, based on a velocity signal X1s from the spindle motor (spindle) and a torque command value U1s for the spindle motor. A second disturbance torque estimating device estimates a disturbance torque Yz acting on a servomotor, based on a velocity signal X1z from the servomotor (feed shaft) and a torque command value U1z for the servomotor. A comparing device obtains a composite disturbance torque Y by combining the estimated disturbance torques Ys and Yz, and compares the composite disturbance torque Y with a preset reference torque Ye. A deceleration/stop command device outputs a command signal to decelerate or stop the tool feed or to change the tool in accordance with the result of the comparison.

    摘要翻译: PCT No.PCT / JP94 / 00668 Sec。 371日期1994年12月29日第 102(e)日期1994年12月29日PCT 1994年4月21日PCT PCT。 公开号WO94 / 26465 PCT 日期1994年11月24日提供了一种能够高精度地容易地检测异常负荷,可靠地防止对工具的损坏的刀具损坏防止系统,并且即使已经发生刀具损坏等也能适当地应对异常。 第一干扰转矩估计装置基于来自主轴电动机(主轴)的速度信号X1s和主轴电动机的转矩指令值U1s来估计作用在主轴电动机上的干扰转矩Ys。 第二扰动转矩估计装置基于来自伺服电机(进给轴)的速度信号X1z和用于伺服电动机的转矩指令值U1z来估计作用在伺服电动机上的扰动转矩Yz。 比较装置通过组合估计的扰动转矩Ys和Yz来获得复合扰动转矩Y,并将复合扰动转矩Y与预设的参考转矩Ye进行比较。 减速/停止指令装置根据比较结果输出指令信号以减速或停止刀具进给或更换刀具。

    Method of and apparatus for moving feed shafts of numerical controlled
machine tool
    2.
    发明授权
    Method of and apparatus for moving feed shafts of numerical controlled machine tool 失效
    数控机床进给轴移动方法及装置

    公开(公告)号:US5888037A

    公开(公告)日:1999-03-30

    申请号:US860323

    申请日:1997-06-23

    摘要: A feed-shaft moving method and an apparatus capable of reducing non-cutting motion time. In a first section and a second section, an immediately preceding path is connected with a rapid traverse by a rapid traverse motion path having a curve continuous with the immediately preceding path. The movement is accelerated up to a rapid traverse speed while passing the curve. In the first section, the path is connected with the next path by a rapid traverse path having a curve continuous with the next movement. The movement is decelerated to the next moving speed while passing the curve. The rapid traverse motion of the feed shaft can be completed in less time, with unnecessary interruption and with no impact on the machine.

    摘要翻译: PCT No.PCT / JP96 / 03111 Sec。 371日期:1997年6月23日 102(e)日期1997年6月23日PCT 1996年10月24日PCT公布。 公开号WO97 / 15874 日期1997年5月1日一种进料轴移动方法和能够减少非切割运动时间的装置。 在第一部分和第二部分中,紧邻在前的路径通过具有与前一路径连续的曲线的快速移动路径与快速移动连接。 在通过曲线时,运动加速到快速移动速度。 在第一部分中,路径通过具有与下一个运动连续的曲线的快速移动路径与下一个路径连接。 运动在通过曲线时减速到下一个移动速度。 进给轴的快速移动可以在更短的时间内完成,不必要的中断,对机器没有影响。

    Drilling control apparatus
    3.
    发明授权
    Drilling control apparatus 失效
    钻孔控制装置

    公开(公告)号:US5599142A

    公开(公告)日:1997-02-04

    申请号:US374798

    申请日:1995-02-15

    摘要: In a drilling control apparatus for properly controlling a load sitting on a drill, a cutting reaction force estimate unit (1) estimates a disturbance load torque Yz acting on a servomotor (feed axis) (63) based on a speed signal X1z to the servomotor (63) and a torque value U1z commanded to the servomotor (63). In drilling operations, the cutting reaction force Yz is equivalent to a cutting reaction force generated between a drill (75) and a workpiece (91). Note, rotation of the drill (75) is controlled by a spindle motor (73) and a position in a Z-axis direction of the drill (75) and a feed speed of the drill (75) are controlled by the servomotor (63) through a spindle head (74). A cutting reaction force monitor unit (2) monitors whether a cutting reaction force estimated by the cutting reaction force estimate unit (1) follows a predetermined pattern, and if not, then a feed axis torque control unit (3) controls a torque of the servomotor (63) to cause the cutting reaction force to follow the predetermined pattern. The cutting reaction force generated between the drill (75) and the workpiece (91) is changed according to the predetermined pattern by a torque control of the feed axis.

    摘要翻译: PCT No.PCT / JP94 / 00981 Sec。 371日期1995年2月15日 102(e)日期1995年2月15日PCT提交1994年6月16日PCT公布。 出版物WO95 / 02485 日期1995年1月26日在用于适当控制坐在钻头上的载荷的钻井控制装置中,切削反作用力估计单元(1)基于速度来估计作用在伺服马达(进给轴)(63)上的扰动载荷扭矩Yz 向伺服电机(63)发送信号X1z,并向伺服电动机(63)指令的转矩值U1z。 在钻孔操作中,切割反作用力Yz等同于在钻头(75)和工件(91)之间产生的切割反作用力。 注意,钻头(75)的旋转由主轴马达(73)控制,并且钻头(75)的Z轴方向的位置和钻头(75)的进给速度由伺服马达(63)控制 )通过主轴头(74)。 切割反作用力监视器单元(2)监视由切割反作用力估计单元(1)估计的切割反作用力是否遵循预定图案,如果否,则进给轴转矩控制单元(3) 伺服电动机(63)使切割反作用力遵循预定的模式。 通过进给轴的转矩控制,在钻头(75)和工件(91)之间产生的切割反作用力根据预定图案而改变。

    Cutter fracture detecting system
    5.
    发明授权
    Cutter fracture detecting system 失效
    刀具断裂检测系统

    公开(公告)号:US5773949A

    公开(公告)日:1998-06-30

    申请号:US682729

    申请日:1996-07-26

    摘要: A cutter fracture detecting system is capable of detecting a fracture of a cutter highly accurately which may occur even when no substantial loads are imposed on a rotating axis and a cutter feed axis of a machine tool. A rotating axis disturbant load torque estimating unit (1) and a moving axis disturbant load torque estimating unit (2) monitor disturbant load torques on a spindle and an axis with respect to which a workpiece and a cutter move relatively to each other, and still axis disturbant load torque estimating units (3, 4) also monitor disturbant load torques on axes with respect to which the workpiece and the cutter do not move relatively to each other. A comparing unit (5) determines that the cutter is fractured based on the disturbant load torques estimated by the disturbant load torque estimating units. When a cutter fracture is detected, the machine tool is stopped by a machine shutdown command unit (6).

    摘要翻译: PCT No.PCT / JP95 / 02154 Sec。 371日期1996年7月26日 102(e)日期1996年7月26日PCT提交1995年10月19日PCT公布。 公开号WO96 / 19316 PCT 日期1996年6月27日刀具断裂检测系统能够高精度地检测刀具断裂,即使在机床的旋转轴线和切削刀进给轴线上没有实质负载的情况下也可能发生切割。 旋转轴干扰负载转矩估计单元(1)和移动轴干扰负载转矩估计单元(2)监测主轴上的干扰负载转矩和相对于工件和切割器彼此相对移动的轴线,静止 轴扰动负载转矩估计单元(3,4)还监测工件和刀具相对于彼此不相对移动的轴上的不稳定负载转矩。 比较单元(5)基于由扰动负载转矩估计单元估计的扰动负载转矩来确定切割器断裂。 当检测到刀具断裂时,机床由机器停机命令单元(6)停止。