发明名称 |
IMPROVEMENTS IN OR RELATING TO DRILLING APPARATUS AND METHODS |
摘要 |
<p>The present invention provides a method of drilling a hole in a workpiece in order to control breakthrough of the workpiece comprising the steps of : a) initiating contact between a drill bit of a drill unit and the workpiece; b) operating the drill unit to rotate the drill bit to drill the workpiece; c) during drilling of the workpiece measuring the force, F and torque, T, experienced by the drill bit; d) calculating a variable F', based on the measured force, F, representing the rate of change of F; e) calculating a variable, T' based on the measured torque, T, representing the rate of change of T; f ) calculating a variable F' ' representing the rate of change of F'; g) calculating a variable T ' ' representing the rate of change of T"; h) detecting the onset of breakout of the workpiece by use of the variables F', F' ', T' and T' '; i) thereby controlling the speed of rotation of the drill bit during breakthrough of the workpiece to control the degree of breakout of the drill bit from the workpiece. A drilling system is also disclosed.</p> |
申请公布号 |
WO2007148114(A1) |
申请公布日期 |
2007.12.27 |
申请号 |
WO2007GB02345 |
申请日期 |
2007.06.22 |
申请人 |
ASTON UNIVERSITY;BRETT, PETER;TAYLOR, ROBIN;PROOPS, DAVID;COULSON, CHRIS;GRIFFITHS, MANSEL, V. |
发明人 |
BRETT, PETER;TAYLOR, ROBIN;PROOPS, DAVID;COULSON, CHRIS;GRIFFITHS, MANSEL, V. |
分类号 |
G05B19/416;B23Q15/013 |
主分类号 |
G05B19/416 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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