Press Forming Blank Waveform Analysis for Dimensional Deviations
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Solution Overview
Problem
Existing techniques cannot predict the influence of shape variations in blanks taken from metal sheets on the dimensional accuracy of press-formed parts, nor can they identify susceptible portions within the press-formed parts.
Innovation Solution
A press forming analysis method that generates standard and cycle deviation waveform blank models to simulate press forming processes, allowing for the identification of portions where shape variations significantly impact the press-formed part's shape and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If press forming is performed using a blank taken from a metal sheet with shape variation, then productivity is improved by using actual metal sheets, but manufacturing precision deteriorates due to unpredictable dimensional deviations in press-formed parts
Solution Approach 1:
The patent performs preliminary press forming analysis simulations using standardized waveform blank models before actual production. By predicting shape variations and their effects on press-formed parts in advance, the system identifies critical portions and deviation amounts, enabling proactive countermeasures to be taken, thus preventing dimensional accuracy deviations while maintaining productivity
Solution Approach 2:
The patent creates standardized waveform blank models that replicate the characteristic shape variations found in actual metal sheets. These models serve as copies that capture the essential features of real blanks, allowing virtual testing and prediction without consuming actual materials, thereby enabling precision prediction while maintaining production efficiency
2Productivity
If the shape variation of blanks is not predicted, then the press forming process remains simple and fast, but the ability to identify critical portions and take countermeasures is lost
Solution Approach 1:
The patent uses standardized waveform blank models as simplified copies of actual blanks with shape variations. These models replicate the essential variation characteristics, enabling rapid virtual prediction of press forming outcomes without requiring complex physical testing, thus maintaining process speed while improving prediction capability
Solution Approach 2:
The patent performs preliminary virtual predictions using standardized models to identify critical portions and potential deviation issues before actual production. This advance prediction capability allows the system to maintain fast production speeds while reliably identifying where countermeasures are needed
Data Source
AI summary
A press forming analysis method includes: a first blank generation step of generating a standard waveform blank model; a first shape acquisition step of acquiring a first shape, which is a shape of press-formed part using standard waveform blank; a second blank generation step of generating a cycle deviation waveform blank model; a second shape acquisition step of acquiring a second shape, which is a shape of press-formed part using cycle deviation waveform blank; and a deviation amount acquisition step of obtaining a portion where both of the shapes deviate from each other and a deviation amount by comparing the first shape with the second shape.