Title:
TOOL BREAKAGE DETECTING SYSTEM
Document Type and Number:
Japanese Patent JP3483636
Kind Code:
B2
Abstract:
PURPOSE: To perform high-precise detection of breakage of a tool which may occur even when a load is not so much applied on a rotation shaft and the feed shaft of a tool.
CONSTITUTION: In addition to monitor disturbance load torque of a shaft to effect relative movement between a main spindle and a work, and a tool by a rotary shaft disturbance torque estimating means 1 and a movement shaft disturbance load torque estimating means 2, disturbance load torque of a shaft not effecting relative movement between the work and the tool is also monitored by static shaft disturbance load torque estimating means 3 and 4. From disturbance load torque estimated thereby, breakage of a tool is decided by a comparing means 5 and when breakage of a toll occurs, a machine is stopped by a machine stop command means 6.
Inventors:
Takashi Nagatomi
Miwako Sakaguchi
Miwako Sakaguchi
Application Number:
JP31803694A
Publication Date:
January 06, 2004
Filing Date:
December 21, 1994
Export Citation:
Assignee:
FANUC CORPORATION
International Classes:
B23B47/24; B23Q17/09; G05B9/02; G05B19/18; G05B19/4065; (IPC1-7): B23Q17/09; G05B19/18
Domestic Patent References:
| JP751991A |
Other References:
【文献】米国特許4741231(US,A)
【文献】米国特許3809488(US,A)
【文献】米国特許3809488(US,A)
Attorney, Agent or Firm:
Matsumoto Takemoto (4 outside)
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