Method of determining worn rotary tool while in service

Details Method of determining worn rotary tool while in service Method of determining worn rotary tool while in service

B - Operations, Transporting

23

Q

342/21

B23Q 11/00 (2006.01) B23Q 11/04 (2006.01) B23Q 17/09 (2006.01) G05B 19/4065 (2006.01)

Patent

CA 1310385

Abstract of the Disclosure A method is disclosed of determining worn rotary tools during machining operations, comprising: (a) establishing the steady-state dominant tool force level required to (i) carry out a rotary machining operation at a given set of cutting conditions in the abrasive wear regime, (ii) using a known worn rotary tool with a given geometry, and (iii) using a workpiece of given material; (b) supporting another rotary tool of the same given geometry in a holder for being power driven for rotation, the holder having means to impart a signal in response to exceeding a predetermined force level calibrated to be just below the steady-state force level of the worn tool; and (c) while employing the support tool, initiating an automatic tool change in response to any signal imparted by the tool support. If the machining operation is drilling, the force level of steps (a) and (b) will use the thrust force component applied axially to the rotary tool. If the machining operation is drilling or tapping, a predominantly torque responsive operation, the force level of steps (a) and (b) will use the torque force component.

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