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    • 6. 发明授权
    • Broken drill bit detector
    • 断钻检测器
    • US4502823A
    • 1985-03-05
    • US332581
    • 1981-12-21
    • Steve WronskiJohn E. AlbrightJeffrey J. Carlson
    • Steve WronskiJohn E. AlbrightJeffrey J. Carlson
    • B23B47/24B23B49/00H05K3/00B23C9/00H01J5/16
    • B23Q17/0909B23B49/001H05K3/0044Y10T408/14Y10T408/172Y10T408/21Y10T409/30392
    • A Drill Bit detector for use with numerically controlled drilling machine capable of sensing missing or broken Drill Bits in the range of 1 mil to 30 mils in diameter, or larger, is described. An infrared emitting diode is driven at a predetermined frequency with the pulsed light being directed through fiber optic cable directed at a portion of the Drill Bit to be detected. A change of light intensity occurring when a Drill Bit is missing is detected and the pulsed light detected converted to a pulsating electrical signal at the input frequency of the pulse light source. A frequency responsive circuit converts the pulsating electrical circuit to a digital signal indicative of the absence of the sensed Drill Bit. A timer determines whether or not the sensed digital signal occurs for a predetermined threshold time period, and causes it to be ignored as spurious if less than the predetermined time interval, or causes the drilling machine operation to be halted if occurring longer than the threshold time period. Multiple detection circuits are illustrated for use with most multiple drill spindles.
    • 描述了一种用于数控钻孔机的钻头检测器,其能够感测在1密耳至30密耳直径或更大的范围内的钻头的缺失或破裂。 红外发射二极管以预定频率被驱动,其中脉冲光被引导通过指向待检测的钻头的一部分的光纤电缆。 检测到钻头丢失时发生的光强变化,并且脉冲光被检测为以脉冲光源的输入频率转换为脉动电信号。 频率响应电路将脉动电路转换成指示感测钻头不存在的数字信号。 定时器确定感测到的数字信号是否在预定的阈值时间周期内发生,并且如果小于预定的时间间隔,则其被忽略为假,或者如果发生时间超过阈值时间,则使钻孔机操作停止 期。 示出了多个检测电路用于大多数多个钻头主轴。
    • 7. 发明授权
    • Unmanned machining center with tool checking
    • 无人机加工中心,带刀具检查
    • US4266120A
    • 1981-05-05
    • US59540
    • 1979-07-23
    • Richard Johnstone
    • Richard Johnstone
    • B23B49/00B23Q7/14B23Q11/08B23Q41/00G05B19/4065G06M3/02
    • B23Q11/08B23B49/001B23Q41/00B23Q7/1426G05B19/4065G05B2219/37103G05B2219/37233G05B2219/37245G05B2219/37252G05B2219/45145G05B2219/49169G05B2219/50139G05B2219/50171G05B2219/50249Y10T408/14
    • A numerically controlled machining center has a tool magazine, automatic tool changer, workpiece shuttle, and a workpiece magazine which holds enough workpieces for operation by the machining center for an entire shift of approximately eight hours. The numerical controls are programmed to perform predetermined machining operations on each workpiece, in turn, and to replace each finished workpiece with a fresh workpiece at the end of each machining program. A proximity switch is mounted on the machining center for checking tools to detect broken or incorrect tools. The tools are positioned adjacent to the proximity switch and are rotated while the output of the proximity switch is counted for one complete rotation of the tool to determine the number of radially extending teeth on the tool. If the tool has too few or too many teeth, thus indicating a broken or incorrect tool, it is replaced by another tool of the same type. If no alternate tool is available in the tool magazine, the machining cycle is automatically suspended.
    • 数控加工中心有一个刀库,自动换刀器,工件梭子和一个工件刀库,可以保存足够的工件,由加工中心运行大约八个小时。 数字控制被编程为依次对每个工件执行预定的加工操作,并在每个加工程序结束时用新的工件代替每个成品工件。 接近开关安装在加工中心,用于检查工具以检测破损或不正确的工具。 工具位于邻近开关附近并旋转,同时计数接近开关的输出以使刀具完全旋转,以确定刀具上径向延伸齿数。 如果刀具齿数太少或太多,因此指示刀具损坏或不正确,则由相同类型的另一刀具代替。 如果刀库中没有备用刀具,加工循环将自动暂停。