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US 12,434,343 B2Granted
Calibration-based tool condition monitoring system for repetitive machining operations
AssigneeRochester Institute of Technology
InventorRui Liu
Life of this patent
Estimating the term…
Abstract
A real-time calibration-based tool condition monitoring system, device and method for repetitive machining operations to monitor tool conditions by a combination of a calibration procedure using a reference tool and similarity analysis comparing the reference tool with a working tool is disclosed.
Claims15
A method for tool condition monitoring, comprising:
- calibrating reference signals for different tool conditions for a machine system comprising a machine, tool, workpiece and monitoring device comprising a sensory system and control software, by
- installing a first reference tool in the machine to operate on a first workpiece,
- operating a repetitive machining operation on the first workpiece with the first reference tool under production conditions, whereby the first reference tool degrades,
- collecting at least one reference signal relating to a condition of the first reference tool generated by the sensory system while monitoring the first reference tool,
- installing a second reference tool in the machine to operate on a second workpiece,
- operating the repetitive machining operation on the second workpiece with the second reference tool under production conditions, whereby the second reference tool degrades,
- collecting at least one reference signal relating to the condition of the second reference tool generated by the sensory system while monitoring the second reference tool, and
- processing the collected at least one reference signals with control software to provide reference signals corresponding to specific reference tool conditions according to a calibration procedure;
- following the calibration of the reference signals for specific tool conditions, operating the repetitive machining operation on a third workpiece with a working tool under production conditions, whereby the working tool degrades;
- collecting at least one working signal relating to the condition of the working tool generated by the sensory system from monitoring tool conditions of the working tool;
- and
- processing and analyzing the collected at least one working signal with control software to provide a similarity analysis between the reference signals and the working signals to identify in real-time a status of the working tool condition.
9 more elements
A tool condition monitoring system, comprising:
- a workpiece;
- a working tool;
- a machine which performs a repetitive process on the workpiece with the working tool, whereby the working tool degrades;
- and
- a monitoring device comprising a sensory system comprising at least one sensor which collects reference signals from multiple reference tools each operating on a different reference workpiece during repetitive operations in calibration of the collected reference signals corresponding to different reference tool conditions and collects working signals during repetitive operations of the working tool in production, and control software which processes the calibrated reference signals and the collected working signals and operates a similarity analysis between the calibrated reference signals and the collected working signals to identify in real-time a status of the working tool condition during repetitive operations in production.
2 more elements
Dependencies are inferred from the claim text.