Electric Press Bend-Point Detection via Load Slope Regression
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Solution Overview
Problem
Conventional methods for detecting bend points in press-fitting operations using electric presses face challenges due to variations in slope values and speed, leading to inaccurate detection and noise interference, especially when calculating the slope of the slope of the load.
Innovation Solution
An electric press system with a detection unit, input/storage unit, calculation unit, and determination unit that calculates and compares the slope of the load and its slope at constant distance intervals, using regression lines and preprocessing to ensure significant values and prevent erroneous detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the slope of the load is calculated using differential operation to detect bend points, then the detection capability is improved, but high-frequency components are enlarged and data is buried in noise
Solution Approach 1:
The patent applies preliminary smoothing processing to the load data before calculating the differential value. This preprocessing step removes high-frequency noise components from the original load data, ensuring that when the differential operation is subsequently performed, the resulting slope values are not contaminated by noise. The smoothing operation is conducted in advance to preserve the integrity of the bend point detection while eliminating the harmful high-frequency components that would otherwise be amplified by the differential calculation.
2Measurement precision
If the slope of the slope of the load is calculated to detect inflection points, then the detection accuracy is improved, but local vibrations are picked up and determination becomes difficult
Solution Approach 1:
The patent performs smoothing processing on the load data before calculating the slope and slope of the slope. This preliminary action removes local vibrations and noise from the original data, ensuring that the subsequent differential calculations are based on cleaned data. By smoothing the data in advance, the patent prevents local vibrations from being picked up during the slope calculations, thereby maintaining determination reliability while still achieving accurate inflection point detection.
Solution Approach 2:
The patent introduces a smoothing operation as an intermediary step between the original load data and the differential calculations. This intermediary processing layer acts as a mediator that filters out harmful local vibrations and noise while preserving the essential features needed for bend point detection. The smoothing operation prepares the data in a suitable form for subsequent slope calculations, making the determination process more reliable.
3Adaptability or versatility
If speed variations occur during press-fitting, then the press operation becomes more flexible, but the calculated slope values become insignificant and erroneous detection occurs
Solution Approach 1:
The patent applies smoothing processing to the load data before calculating slopes, which compensates for the effects of speed variations. By removing high-frequency noise and local vibrations through preliminary smoothing, the patent ensures that the calculated slope values remain significant and meaningful even when speed variations occur during press-fitting. This preprocessing step makes the slope calculations robust against speed changes, preventing erroneous detection while maintaining operational flexibility.
Data Source
AI summary
A detection unit for detecting a data row of a press position and a load at the press position; an input/storage unit for storing at least a load value serving as references for determining stop or judge; a calculation unit of the value of the slope of the load for calculating the value of the slope of the load based on the press position and the load at the press position detected; a calculation unit of the value of the slope of the slope of the load for calculating the value of the slope of the slope of the load based on the calculated value of the slope of the load; and a determination unit for comparing the calculated value of the slope of the slope of the load with the values serving as the references to determine stop or judge are provided.