Punch Vibration Timing Detection for Wear-Robust Crack Monitoring
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Solution Overview
Problem
Existing methods for detecting the timing of punch strikes and crack events in high-speed pressing machines are affected by punch wear and differences between actual and set conditions, leading to inaccurate timing detection.
Innovation Solution
An information processing apparatus that uses an accelerometer to detect vibrations during the processing of a workpiece, identifying the start timing and cracking timing based on the amplitude of the vibration waveform, and transmits this information for display and comparison with reference data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If vibration detection methods are used to detect punch strike timing, then the detection can be performed without load sensors, but the timing detection accuracy is affected by punch wear and condition variations
Solution Approach 1:
The system performs preliminary detection of the workpiece position and punch position before the actual strike timing detection. This preliminary action allows the system to establish baseline conditions and adjust detection parameters accordingly, improving timing accuracy despite punch wear or condition variations.
Solution Approach 2:
The detection system dynamically adjusts its parameters based on detected vibration patterns and compares them against reference data. This dynamic adaptation allows the system to maintain accurate timing detection even when punch wear or workpiece conditions change during operation.
2Device complexity
If fixed reference waveforms are used for timing detection, then the detection method is simple, but it cannot adapt to actual condition variations
Solution Approach 1:
The system uses feedback by comparing detected vibration waveforms against reference data and adjusting timing detection based on the comparison results. This feedback mechanism enables the system to adapt to actual condition variations while maintaining a relatively simple detection methodology.
Solution Approach 2:
The system changes detection parameters dynamically by comparing vibration characteristics against reference data under different operating conditions. This allows the simple detection method to become adaptable to various actual conditions through parameter adjustment rather than requiring complex hardware changes.
3Measurement precision
If detailed vibration analysis is performed to improve timing detection accuracy, then measurement precision improves, but processing time increases
Solution Approach 1:
The system extracts only the essential vibration characteristics needed for timing detection from the full vibration signal, rather than performing detailed analysis of the entire waveform. This extraction approach maintains high timing detection precision while significantly reducing processing time by focusing only on the most relevant features.
Solution Approach 2:
The system performs partial analysis by comparing vibration data against reference information at key decision points rather than continuously analyzing all vibration data in detail. This partial action approach provides sufficient timing precision while minimizing processing time loss.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Accurately detects the timing of punch strikes and crack events, even in machines without load sensors, by focusing on peaks in the vibration waveform, enabling precise monitoring of punch wear and process consistency.
Implementation Method 1
an acquisition unit to obtain detected information representing a detected vibration generated in processing on a workpiece
Data Source
Figure 1
Figure 2A~2C
Figure 3~4
AI summary
An information processing apparatus includes an acquisition unit (76) to obtain detected information representing a detected vibration generated in processing on a workpiece, and a detection unit (78) to detect, based on the detected information, a start timing at which a punch has started striking the workpiece and a cracking timing at which the punch has cracked the workpiece.