Press System Abnormality Level Determination via Stoppage Duration
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Solution Overview
Problem
In press systems, a high frequency of abnormal events does not necessarily indicate a high level of importance, making it difficult to distinguish between different abnormality levels.
Innovation Solution
A press system that includes a detection unit for identifying abnormalities and an abnormality determination unit that assesses the level of an abnormality based on the stoppage period after the occurrence, allowing for notification and storage of data accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If abnormality data is stored based on frequency of occurrence, then data on frequent abnormalities is prioritized, but the degree of importance cannot be determined
Solution Approach 1:
The patent changes the parameter for abnormality prioritization from frequency of occurrence to stoppage period duration. By measuring how long the press machine stops due to an abnormality, the system can determine the importance level of each abnormality type, with longer stoppages indicating higher importance. This resolves the contradiction by providing a simple yet effective metric that directly reflects abnormality severity without requiring complex analysis systems.
2Reliability
If all abnormality data is stored, then complete analysis is possible, but memory capacity is wasted on low-importance abnormalities
Solution Approach 1:
The patent extracts and stores only the most important abnormality data by prioritizing records based on stoppage period duration. The storage unit keeps a limited number of abnormality records (e.g., top 10) sorted by importance, extracting only the critical data needed for effective analysis. This resolves the contradiction by maintaining analysis reliability through selective storage of high-importance abnormalities while conserving memory capacity by excluding less critical data.
3Ease of operation
If abnormality importance is determined by frequency, then simple measurement is possible, but incorrect prioritization occurs
Solution Approach 1:
The patent changes the assessment parameter from frequency count to stoppage period duration. This simple temporal measurement directly reflects the impact and importance of each abnormality, with longer stoppages indicating more serious issues. The method maintains ease of operation through automatic timing measurement while achieving accurate prioritization, resolving the contradiction between simplicity and precision in abnormality assessment.
Data Source
AI summary
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.