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    • 4. 发明申请
    • ROTARY CUTTING TOOL
    • 旋转切割工具
    • WO1988003672A1
    • 1988-05-19
    • PCT/GB1987000794
    • 1987-11-09
    • RENISHAW PLCMcMURTRY, David, Roberts
    • RENISHAW PLC
    • G05B19/18
    • G05B19/4166B23B29/03432B23B2229/16B23B2270/48G05B2219/33207G05B2219/33337G05B2219/34443G05B2219/34448G05B2219/37027G05B2219/37351G05B2219/37405G05B2219/50063G05B2219/50252G05B2219/50293Y10T408/175Y10T408/85Y10T408/85843Y10T408/859
    • A boring tool (30) mounted on the spindle (10) of a boring machine is adapted for automatically producing a first bore (12A) and measure the diameter thereof prior to boring a relatively larger second bore (12B). The tool (30) includes a computer (40) storing the values of demanded first and second diameters, and programmed to determine the difference between the measured first diameter and the demanded second diameter, this difference being added to the demanded first diameter to produce a weighted target diameter (WTD4), whereby account is taken of the cutting error due to deflection of the tool while cutting the first bore (12A). The tool (30) includes a stepper motor (38) adapted to position the cutting bit (32) of the tool (30) in accordance with demand signals from the computer (40) identifying the diameters to be cut. The computer (40) can only identify a diameter in comparative terms i.e. in terms of a number of steps of the motor (38). If a diameter is to be known in absolute terms, the diameter e.g. of the first bore (12A) is measured independently of the tool (30) by a probe temporarily mounted on the spindle (10) whereby the diameter of the bore can be determined in terms of, say, micrometers by a computer (20) provided on the machine. The probe-measured value of the diameter is transmitted to the computer (40) of the tool (30) by an optical communication link (50) to provide the latter computer (40) with a reference identifying the diameter in absolute terms.
    • 安装在钻孔机的心轴(10)上的钻孔工具(30)适用于自动生产第一孔(12A)并且在钻孔较大的第二孔(12B)之前测量其直径。 工具(30)包括存储要求的第一和第二直径的值的计算机(40),并被编程以确定所测量的第一直径和所要求的第二直径之间的差,该差被加到所要求的第一直径上以产生 加权目标直径(WTD4),由此考虑到在切割第一孔(12A)时由于工具的偏转导致的切割误差。 工具(30)包括步进电动机(38),该步进电动机适于根据来自计算机(40)的识别要切割的直径的需求信号来定位工具(30)的切割钻头(32)。 计算机(40)只能以比较的方式识别直径,即以电动机(38)的步骤数来表示。 如果以绝对值知道直径,则直径 通过临时安装在主轴(10)上的探针独立于工具(30)测量第一孔(12A)的尺寸,由此可以通过计算机(20)来确定孔的直径(例如,微米),计算机(20) 在机器上 直径的探头测量值通过光通信链路(50)发送到工具(30)的计算机(40),以向后一计算机(40)提供以绝对值标识直径的参考。