Reference-Line Shape Comparison for Deformation Processing
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Solution Overview
Problem
Current methods for determining the necessary deformation amount in deformation processing of large or complex works are labor-intensive and time-consuming, especially when the curvature difference between intermediate and target shapes is significant, leading to low precision or inability to calculate accurately.
Innovation Solution
A deformation processing support system and method that acquires target and intermediate shape data with reference lines, positioning them relative to each other to calculate the necessary deformation amount for each position, using 3D laser scanners and cameras to enhance precision and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the best-fit technique is used to overlap intermediate shape data and target shape data, then the necessary deformation amount can be calculated, but the calculation precision degrades or calculation becomes unable when curvature significantly differs between the two shapes
Solution Approach 1:
The patent changes the fundamental parameter of shape comparison from curvature-based best-fit matching to reference line-based positioning. By transforming the comparison criterion from geometric curvature similarity to reference line coincidence, the method becomes applicable regardless of curvature differences between intermediate and target shapes.
Solution Approach 2:
The patent introduces reference lines as an intermediary element that mediates the comparison between intermediate and target shapes. These reference lines serve as a common reference framework that exists on both shapes, enabling accurate positioning and deformation calculation without requiring direct curvature matching.
2Measurement precision
If wooden forms are stacked on the work to ascertain gaps and necessary deformation amount, then the deformation information can be obtained, but much labor and a long time period are necessary
Solution Approach 1:
The patent replaces the mechanical stacking method with wooden forms with a digital measurement and calculation system. By using 3D measurement data, reference line detection, and computer-based deformation calculations, the system eliminates the need for physical wooden forms while maintaining measurement accuracy and significantly improving efficiency.
Solution Approach 2:
The patent creates digital copies (3D measurement data) of the workpiece at intermediate stages and compares them with the target shape data. This digital copying and comparison approach replaces the physical wooden form copying method, enabling faster and more accurate deformation assessment.
3Ease of operation
If the best-fit technique is used for overlapping shape data, then deformation calculation can be performed, but the method cannot be conducted when no similarity points are present
Solution Approach 1:
The patent introduces reference lines as a universal intermediary that can be applied to any workpiece regardless of its geometric features. These reference lines provide a consistent positioning framework that works for all work conditions, eliminating the limitation of requiring similarity points for best-fit matching.
Data Source
AI summary
A deformation processing system acquires target shape data of a work including a reference line, acquires intermediate shape data from the work having an intermediate shape having a reference line drawn thereon, puts these two pieces of data side by side by positioning the reference lines relative to each other, and calculates a necessary deformation amount of the work based on the difference between the two pieces of data put side by side.