Title:
METHOD OF MONITORING TOOL LIFE
Document Type and Number:
WIPO Patent Application WO/1984/001534
Kind Code:
A1
Abstract:
In this method of monitoring tool life wherein the life of a tool is monitored so that, when the life of the tool has expired, another tool is employed for the machining, the method comprises the steps of: setting in memory means (105, 111) the number of part-machining operations WL corresponding to the life of each tool and a tool selection number correction value Nct; inserting at the end of an NC machining program at least one of a command or a symbol indicating the end of the program; counting the number of the commands or symbols indicating program end; monitoring whether a count value W coincides with the number of part-machining operations WL which has been previously set, and counting the number of these coincidences; calculating in an arithmetic circuit (110) Nt + Nct.n where n is the number of coincidences, Nt the tool selection number indicated by a tool selection command in the NC machining program, and Nct the tool selection number correction value; and selecting a tool by using the result of this calculation as the actual tool selection number.
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Inventors:
KIYA NOBUYUKI (JP)
Application Number:
PCT/JP1983/000330
Publication Date:
April 26, 1984
Filing Date:
October 06, 1983
Export Citation:
Assignee:
FANUC LTD (JP)
International Classes:
B23Q11/00; B23Q15/16; G05B19/4065; (IPC1-7): B23Q15/16; G05B19/403
Foreign References:
| JPS5676355A | 1981-06-23 | |||
| JPS5157080A | 1976-05-19 | |||
| JPS5134995B2 | 1976-09-29 |
Other References:
See also references of EP 0120974A4
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