Complex Glass Cutting Plans Using Layer-Specific Defect Maps
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Solution Overview
Problem
Current methods for generating cutting plans for complex glass products, such as laminated glass, do not distinguish between defects in glass sheets and other constituent elements, leading to unnecessary losses during cutting as all defects are treated equally and their exclusion zones are implicitly defined, resulting in inefficient cutting processes.
Innovation Solution
A method that generates a cutting plan for complex glass products by obtaining and combining defect maps of glass sheets and other layers, allowing cutting lines to pass through exclusion zones of defects in non-glass layers based on their criticality levels, thereby relaxing cutting constraints and minimizing losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all defects in complex glass products are treated equally with uniform exclusion zones, then cutting safety is ensured, but material loss increases unnecessarily
Solution Approach 1:
The patent applies local quality by differentiating the treatment of defects based on their location and type. Glass sheet defects receive full exclusion zones for safety, while interlayer defects receive reduced or no exclusion zones. This localized differentiation optimizes material utilization while maintaining cutting safety for critical defects.
Solution Approach 2:
The patent changes the parameter of exclusion zone size based on defect characteristics. Instead of a uniform exclusion zone radius for all defects, the system adjusts the exclusion zone parameters dynamically: full exclusion for glass sheet defects, partial or no exclusion for interlayer defects, thereby reducing material loss while ensuring safety.
2Manufacturing precision
If exclusion zones are defined for all defects including interlayer defects, then cutting accuracy is maintained, but cutting efficiency decreases
Solution Approach 1:
The system applies different cutting constraints to different defect types. Glass sheet defects enforce strict cutting avoidance for accuracy, while interlayer defects allow cutting lines to pass through or with minimal exclusion, thereby improving cutting efficiency without compromising accuracy for critical defects.
Solution Approach 2:
The patent applies partial action by selectively applying exclusion zones only where necessary (glass sheet defects) and reducing or eliminating them for non-critical defects (interlayer defects). This partial application of exclusion constraints optimizes the balance between cutting accuracy and efficiency.
3Device complexity
If a simple superposition of defect maps is used, then processing complexity is reduced, but cutting optimization is insufficient
Solution Approach 1:
The patent changes the processing approach from simple superposition to weighted superposition, where different defect types are assigned different weights and exclusion zone parameters. This enhanced processing method reduces material loss by optimizing cutting paths based on defect criticality, while the automated calculation keeps complexity manageable.
Solution Approach 2:
The system creates separate defect maps for different defect types (glass sheet defects, interlayer defects) and processes them differently. By copying and differentiating the defect representation, the system achieves better optimization without excessive complexity, as each map can be processed with appropriate constraints.
Data Source
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AI summary
The method enables the generation of a cutting plan for a complex glass product (VF) comprising at least one sheet of glass (FV) and at least one other layer (FI) than a sheet of glass. The method comprises: - a step (E20) of producing a map (CFV) of the defects in the at least one sheet of glass (FV); - a step (E40) of producing at least one other map (CFI, CDF) of defects, the defects in the at least one other map not being defects in a sheet of glass; each of the maps (CFV, CFI, CDF) comprising, for each of its defects, a position of the defect, a size of the defect, and a criticality level of the defect; - a step (E110) of generating a cutting plan (FDD) of the complex glass product (VF) at least on the basis of the maps (CFV, CFI, CDF) and specifications (CDC) taking account of the criticality levels, the cutting plan (FDD) comprising at least one cutting line and being such that none of the cutting lines passes through an exclusion zone of a so-called defect in the at least one sheet of glass (FV), the method being characterised in that it allows at least one of the cutting lines to pass through an exclusion zone of a defect on the other map (CFI, CDF).