公开(公告)号：EP0343623A3

公开(公告)日：1990-10-31

申请号：EP89109376.7

申请日：1989-05-24

申请人： Cooper Industries Inc.

发明人： Alexander, Robert Herman ,  Neely, James Wesley ,  Osmer, Thomas Mitchell

IPC分类号： G05B19/18 ,  G05B19/416

CPC分类号： G05B19/4163 ,  G05B2219/37344 ,  G05B2219/45129 ,  Y10T408/03 ,  Y10T408/14 ,  Y10T408/165 ,  Y10T408/172 ,  Y10T409/306888 ,  Y10T409/30728

摘要： The thrust exerted on a drill bit (14) is sensed and employed to determine the speed at which the bit is driven. A controller (26) for the drill (10) compares the thrust to a predetermined threshold value and in response to the comparison emits a control signal which shifts a trans­mission (22) in the drill into high or low speed. After each shift, a number of thrust samples are taken in order to compute an average thrust for different strata (A, B, C) of the material (W) being drilled. At the completion of drilling each hole, the average thrusts for the hole are used to recalibrate the shift threshold value. In this manner, the shift threshold is adjusted to compen­sate for drill bit wear. The sensed thrust is also compared to a bit reject threshold value to determine when the bit is too dull for proper drilling.

公开(公告)号：EP0343623B1

公开(公告)日：1995-03-15

申请号：EP89109376.7

申请日：1989-05-24

申请人： Cooper Industries, Inc.

发明人： Alexander, Robert Herman ,  Neely, James Wesley ,  Osmer, Thomas Mitchell

IPC分类号： G05B19/18 ,  G05B19/416

CPC分类号： G05B19/4163 ,  G05B2219/37344 ,  G05B2219/45129 ,  Y10T408/03 ,  Y10T408/14 ,  Y10T408/165 ,  Y10T408/172 ,  Y10T409/306888 ,  Y10T409/30728

公开(公告)号：EP0343623A2

公开(公告)日：1989-11-29

申请号：EP89109376.7

申请日：1989-05-24

申请人： Cooper Industries Inc.

发明人： Alexander, Robert Herman ,  Neely, James Wesley ,  Osmer, Thomas Mitchell

IPC分类号： G05B19/18 ,  G05B19/416

CPC分类号： G05B19/4163 ,  G05B2219/37344 ,  G05B2219/45129 ,  Y10T408/03 ,  Y10T408/14 ,  Y10T408/165 ,  Y10T408/172 ,  Y10T409/306888 ,  Y10T409/30728

摘要： The thrust exerted on a drill bit (14) is sensed and employed to determine the speed at which the bit is driven. A controller (26) for the drill (10) compares the thrust to a predetermined threshold value and in response to the comparison emits a control signal which shifts a trans­mission (22) in the drill into high or low speed. After each shift, a number of thrust samples are taken in order to compute an average thrust for different strata (A, B, C) of the material (W) being drilled. At the completion of drilling each hole, the average thrusts for the hole are used to recalibrate the shift threshold value. In this manner, the shift threshold is adjusted to compen­sate for drill bit wear. The sensed thrust is also compared to a bit reject threshold value to determine when the bit is too dull for proper drilling.

摘要翻译： 感测并施加施加在钻头（14）上的推力来确定钻头被驱动的速度。 用于钻机（10）的控制器（26）将推力与预定阈值进行比较，并且响应于比较，发射将钻机中的变速器（22）移动成高速或低速的控制信号。 在每个班次之后，采取多个推力样本来计算正在钻取的材料（W）的不同层（A，B，C）的平均推力。 在钻孔完成后，孔的平均推力用于重新校准换挡阈值。 以这种方式，调整偏移阈值以补偿钻头磨损。 感测到的推力也与位拒绝阈值进行比较，以确定钻头何时太钝以适当钻孔。