Numerical control unit

Details Numerical control unit Numerical control unit

2005-05-10

2005-05-10

Von Buhr, Maria N. (Department: 2125)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Product assembly or manufacturing

C702S034000

Reexamination Certificate

active

06892110

ABSTRACT:
A numerical control unit having a load monitoring function for monitoring a load on a tool drive source during a machining operation. The numerical control unit includes a load monitoring section for monitoring the load on an electric motor; a wear recognizing section for recognizing the current extent of tool wear; a storing section for storing a plurality of preset limit load values corresponding individually to predetermined various extents of tool wear; a calculating section for calculating the current limit load value corresponding to the current extent of tool wear recognized in the wear recognizing section, based on the plurality of preset limit load values stored in the storing section; and a comparing section for comparing the load on the electric motor, monitored in the load monitoring section, to the current limit load value calculated in the calculating section, and for judging on the abnormality of the load. The wear recognizing section recognizes the current extent of tool wear by using one parameter selected from a group consisting of the number of times of use of a tool, the duration of cutting by a tool, the distance of cutting by a tool and the number of times of execution of machining program. The load monitoring section monitors at least one of maximum value, average value and minimum value of the load in a certain procedure of a machining program.

REFERENCES:
patent: 4536849 (1985-08-01), Borisch et al.
patent: 5568028 (1996-10-01), Uchiyama et al.
patent: 5857166 (1999-01-01), Kim
patent: 5936369 (1999-08-01), Iwashita et al.
patent: 6129609 (2000-10-01), Ripper et al.
patent: 6384560 (2002-05-01), Kakino et al.
patent: 6615103 (2003-09-01), Fujishima et al.
patent: 20020013639 (2002-01-01), Fujishima et al.
patent: 20040174130 (2004-09-01), Inoue et al.
patent: 1 166 960 (2002-01-01), None
patent: 1 342 534 (2003-09-01), None
patent: 1449615 (2004-08-01), None
patent: 7-51991 (1995-02-01), None
patent: 07-108443 (1995-04-01), None

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