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US 11,059,251 B2Granted
Press system and control method for press system
AssigneeKomatsu Industries Corporation
InventorTakahiko Kurokawa
Life of this patent
Estimating the term…
Abstract
A press system includes a detection unit configured to detect occurrence of an abnormality during press working for a workpiece, and an abnormality determination unit configured to determine an abnormality level, based on the abnormality detected by the detection unit and a stoppage period for which a pressing operation is stopped after occurrence of the abnormality.
Claims9
A press system comprising:
- a press machine for press working of a workpiece;
- and
- a controller for controlling operation of the press machine, the controller configured to:
- detect an occurrence of an abnormality of the press machine during press working of the workpiece based on a detection signal from at least one abnormality sensor of the pressing machine that detects the abnormality of the pressing machine;
- stop the press working of the workpiece by the press machine based on the occurrence of the abnormality;
- detect a stoppage period from when the press working of the workpiece by the press machine is stopped after the occurrence of the abnormality to when the abnormality is resolved and a press operation of the press machine is restarted;
- upon detecting the occurrence of the abnormality, count the stoppage period from when the press working of the work piece by the press machine is stopped after the occurrence of the abnormality to when the abnormality is resolved and the press operation of the press machine is restarted, wherein, when a predetermined pressing operation of the press machine is performed, counting the stoppage period does not stop, and wherein, when the predetermined pressing operation of the press machine is not performed, counting the stoppage period stops;
- and
- determine an abnormality level based on a length of the stoppage period.
6 more elements
A control method for a press system, the control method comprising:
- receiving an abnormality occurrence signal from at least one abnormality sensor of a press machine that detects an abnormality of the press machine during press working of a workpiece by the press machine;
- stopping the press working of the workpiece by the press machine based on the abnormality occurrence signal;
- detecting a stoppage period from when the press working of the workpiece by the press machine is stopped after a generation of the abnormality occurrence signal to when an abnormality of the abnormality occurrence signal is resolved and a press operation of the press machine is restarted;
- upon detecting the occurrence of the abnormality, counting the stoppage period from when the press working of the work piece by the press machine is stopped after the occurrence of the abnormality to when the abnormality is resolved and the press operation of the press machine is restarted, wherein, when a predetermined pressing operation of the press machine is performed, counting the stoppage period does not stop, and wherein, when the predetermined pressing operation of the press machine is not performed, counting the stoppage period stops;
- and
- determining an abnormality level based on a length of the stoppage period.
3 more elements
A press system comprising:
- a press machine for press working of a workpiece;
- and
- a controller for controlling operation of the press machine, the controller configured to:
- detect an occurrence of an abnormality of the press machine during press working of the workpiece;
- stop the press working of the workpiece by the press machine based on the occurrence of the abnormality;
- upon detecting the occurrence of the abnormality, count a stoppage period from when the press working of the work piece by the press machine is stopped after the occurrence of the abnormality to when the abnormality is resolved and a press operation of the press machine is restarted;
- during counting the stoppage period, determine whether an inching operation is performed by the press machine;
- when the inching operation is determined to be performed by the press machine, continue to count the stoppage period;
- when the inching operation is determined not to be performed by the press machine, stop counting the stoppage period;
- and
- determine an abnormality level based on a length of the stoppage period.
8 more elements
Dependencies are inferred from the claim text.