Press Forming Analysis for Blank Shape Variation Deviation Prediction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing press forming techniques cannot predict the influence of shape variations in metal sheets on the dimensional accuracy of press formed parts, nor identify susceptible areas, leading to potential deviations from targeted dimensions.
Innovation Solution
A press forming analysis method that includes acquiring a first shape using a flat blank model, generating a shape variation blank model based on actual sheet measurements, and comparing it to a second shape after die release to determine deviation amounts and identify critical areas requiring countermeasures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a flat blank model is used for press forming analysis, then the analysis process is simple, but the prediction accuracy of shape variation influence is poor
Solution Approach 1:
The invention applies preliminary action by performing press forming analysis on multiple types of blanks (flat blank model and shape variation blank model) before actual production. This allows prediction of shape variation influences in advance, enabling proactive identification of problematic areas and implementation of countermeasures before manufacturing begins, thus resolving the contradiction between simple analysis process and accurate prediction.
2Manufacturing precision
If shape variation blank model is used for press forming analysis, then the prediction accuracy of shape variation influence is improved, but the analysis process complexity increases
Solution Approach 1:
The invention applies local quality by focusing analysis on specific local areas where shape variations occur in the blank. Instead of analyzing the entire blank uniformly, the method identifies and concentrates computational resources on regions with significant shape variations, thereby improving prediction accuracy for critical areas while controlling overall analysis complexity.
Solution Approach 2:
The invention applies segmentation by dividing the press forming analysis into multiple stages: first analyzing with a flat blank model to establish a baseline, then separately analyzing with a shape variation blank model to identify specific influences. This segmented approach allows systematic comparison and reduces the complexity of performing a single comprehensive analysis.
3Productivity
If press forming is performed without predicting shape variation influence, then the productivity is high, but the dimensional accuracy of press formed parts deteriorates
Solution Approach 1:
The invention performs press forming analysis on multiple types of blanks before actual production to predict shape variation influences in advance. This preliminary action identifies potential dimensional accuracy issues before manufacturing begins, allowing for proactive countermeasures that prevent defects without requiring extensive rework or scrap during production, thus maintaining high productivity while ensuring dimensional accuracy.
4Manufacturing precision
If press forming analysis is performed on multiple types of blanks, then the prediction accuracy of shape variation influence is improved, but the analysis time increases
Solution Approach 1:
The invention segments the press forming analysis into distinct phases: a first analysis using a flat blank model to establish baseline behavior, and a second analysis using a shape variation blank model to identify specific variation influences. This segmentation allows efficient use of computational resources by separating general from specific analysis, improving prediction accuracy while controlling total analysis time.
Solution Approach 2:
The invention applies partial action by focusing the detailed shape variation analysis only on critical areas where variations significantly impact dimensional accuracy. Instead of performing exhaustive analysis on the entire blank, the method concentrates computational effort on regions of interest, thereby improving prediction accuracy for critical dimensions while minimizing overall analysis time.
Data Source
AI summary
A press forming analysis method predicts an influence of a shape variation of a blank taken from a metal sheet having the shape variation when press forming is performed by using the blank and includes: acquiring a shape of a press formed part after die release as a first shape by performing press forming analysis when press forming is performed with a predetermined tool-of-press-forming model by using a flat blank model; generating a shape variation blank model corresponding to the shape variation; acquiring a shape of a press formed part after die release as a second shape by performing press forming analysis when press forming is performed with the predetermined tool-of-press-forming model by using the shape variation blank model; and acquiring a portion where both of the first and second shapes deviate from each other and a deviation amount by comparing the first and second shapes.