Claims
- 1. A machining control system, comprising:
a machining data base for storing information necessary for determining initial machining conditions; machining information determining means for obtaining the initial machining conditions on the basis of the information stored in said machining data base and in accordance with adaptive control characteristics defined by adaptive control modes and adaptive control parameters; and adaptive control means for controlling the machining in an appropriate state by changing the machining conditions in accordance with the machining states observed during the machining with said initial machining conditions as initial value of the machining conditions.
- 2. A machining control system as claimed in claim 1, wherein said machining data base stores therein information on tool characteristics, workpiece characteristics, relational expressions of the machining states to the tool characteristics/the workpiece characteristics and the machining conditions, standard machining conditions and machining state target values.
- 3. A machining control system as claimed in claim 1, wherein in the case where there are a plurality of selectable adaptive control characteristics, said machining information determining means selects the adaptive control characteristic such that any one of a machining period of time, a shape error, an abnormality occurrence rate and a tool wear amount becomes minimum among the plurality of adaptive control characteristics, and determines said initial machining conditions suitable for said adaptive control characteristics selected.
- 4. A machining control system as claimed in claim 1, wherein said adaptive control means analyzes at least one of the tool characteristics and the workpiece characteristics on the basis of the machining states that is observed through the machining and the machining conditions, and updates at least one of the information of the tool characteristics and the workpiece characteristics which are retained in said machining data base.
- 5. A machining control system as claimed in claim 1, wherein said machining data base is structured by characteristics inherent to the tools and the workpieces now used, characteristics common to the tools and the workpieces of the same lots as those of the tools and the workpieces now used, and characteristics common to all of the tools and the workpieces of the same kinds of the tool and the workpiece now used.
- 6. A machining control system as claimed in claim 1, wherein in the case where the machining is conducted first after the tools have been exchanged, said machining information determining means obtains the machining conditions such that the expected machining state does not exceed a machining state target value taking the characteristics common to the tools of the same lot or the same kind and a variation in the characteristics of the tools into consideration which are stored in said machining data base, and the machining conditions are determined as the initial machining conditions.
- 7. A machining control system as claimed in claim 1, wherein in the case where the machining is conducted first after the workpieces have been exchanged, said machining information determining means obtains the machining conditions such that the expected machining state does not exceed a machining state target value taking the characteristics common to the workpieces of the same lot or the same kind and a variation in the characteristic of the workpieces into consideration which are stored in said machining data base, and the machining conditions are determined as the initial machining conditions.
- 8. A machining control system as claimed in claim 1, wherein said adaptive control means judges that the abnormality occurs if the tool characteristics and the workpiece characteristics which are referred to in determination of the machining conditions in said machining information determining means are largely different from the tool characteristics and the workpiece characteristics which are analyzed in said adaptive control means, respectively, and updates at least one of the information of the tool characteristics and the workpiece characteristics with respect to the machining data base, and said machining information determining means re-determines the adaptive control characteristics and the machining conditions to prevent the abnormality.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2000-065279 |
Mar 2000 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application is based on Application No. 2000-065279, filed in Japan on Mar. 9, 2000, the contents of which are hereby incorporated by reference.