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    Dynamic correction of servo following errors in a computer-numerically controlled system and fixed cycle utilizing same
    5.
    发明授权
    Dynamic correction of servo following errors in a computer-numerically controlled system and fixed cycle utilizing same 失效
    在计算机数控系统中的伺服跟随误差的动态校正和使用相同的固定循环

    公开(公告)号：US5005135A

    公开(公告)日：1991-04-02

    申请号：US327324

    申请日：1989-03-22

    申请人： Alfred H. Morser ,  Walter M. Gildemeister ,  David M. Farmer

    发明人： Alfred H. Morser ,  Walter M. Gildemeister ,  David M. Farmer

    IPC分类号： G05B13/02 ,  G05B19/18 ,  G05B19/37 ,  G05B19/404 ,  G05B19/4061 ,  G05B19/4155 ,  G05B19/416

    CPC分类号： G05B19/373 ,  G05B2219/33119 ,  G05B2219/33338 ,  G05B2219/34206 ,  G05B2219/34419 ,  G05B2219/35245 ,  G05B2219/35263 ,  G05B2219/35279 ,  G05B2219/35287 ,  G05B2219/35294 ,  G05B2219/35373 ,  G05B2219/35394 ,  G05B2219/36168 ,  G05B2219/36395 ,  G05B2219/37619 ,  G05B2219/41113 ,  G05B2219/41192 ,  G05B2219/41219 ,  G05B2219/42062 ,  G05B2219/42152 ,  G05B2219/43199 ,  G05B2219/45215 ,  G05B2219/45216 ,  G05B2219/49376 ,  G05B2219/50109 ,  G05B2219/50113 ,  G05B2219/50208 ,  Y10T409/30056

    摘要： The invention relates to servo-driven computer-numerically-controlled systems of the type adapted to receive part program instructions defining a desired path of relative movement between a tool and a workpiece, wherein the path may include an interior or exterior curved portion to be effected by coordinated linear movement of machine members along at least two orthogonal linear axes. The invention provides apparati and methods for correcting path radius errors to facilitate rapid and accurate movement along the curve. In a preferred embodiment, such path radius correction is applied to a fixed cycle for machining inside circles preferably incorporating such path radius correction and providing substantially tangential engagement between the tool and a machining locus orbited by the tool to avoid abrupt accelerations or decelerations while the tool is in contact with the workpiece. In addition to avoiding surface blemishes, this facilitates machining a broader range of hole sizes with a given sized tool thereby reducing the need for frequent tool changes. The invention carries out path radius correction by generating position commands received by the servo using corrected radius data, the difference between which and the desired radius to be machined compensates for at least a portion of the path radius error that would otherwise be generated by the servo. Apparatus and methods for threading holes using a non-helical threading tools with or without path radius correction are also disclosed.

    摘要翻译： 本发明涉及适于接收部件程序指令的伺服驱动的计算机数字控制系统，该程序指令限定了工具和工件之间的相对运动的期望路径，其中该路径可包括要实现的内部或外部弯曲部分 通过沿着至少两个正交线性轴的机器构件的协调线性运动。 本发明提供了用于校正路径半径误差的装置和方法，以促进沿着曲线的快速和准确的移动。 在优选实施例中，将这种路径半径校正应用于用于在圆内进行加工的固定循环，优选地包括这种路径半径校正并且在工具与由工具轨道运动的加工轨迹之间提供基本上切向的接合以避免突然加速或减速，同时工具 与工件接触。 除了避免表面瑕疵之外，这有助于使用给定尺寸的工具加工更宽范围的孔尺寸，从而减少频繁更换刀具的需要。 本发明通过产生由伺服使用校正的半径数据接收的位置命令来执行路径半径校正，其中加工的所需半径和所需半径之间的差补偿由伺服器产生的路径半径误差的至少一部分 。 还公开了使用具有或不具有路径半径校正的非螺旋穿线工具穿孔的装置和方法。