Cut Path Generation for Kerf Compensation in Complex Patterns

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Solution Overview

Problem

Existing cutting device control methods face complications when dealing with multiple paths, leading to over-cutting, under-cutting, and failure to accurately cut narrow areas due to the thickness of the cut (kerf), resulting in mismatched final cut items and potential fallout of pattern portions.

Innovation Solution

A method that involves selecting a first image line and a second closed image line, identifying intersections, and determining turns at these intersections to form a merged cut-path, which combines portions of both lines, thereby reducing the impact of cut thickness and improving accuracy in cutting complex patterns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple cutting paths are used to cut complex patterns, then the ability to cut intricate designs is improved, but the complexity of controlling the cutting tool increases and errors such as over-cutting and under-cutting occur

Engineering Contradiction:

Improveability to cut intricate designsVSAvoidcomplexity of controlling the cutting tool

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges multiple cutting paths into a single integrated path by identifying intersections between paths and creating a unified cutting sequence. This combines the versatility of multiple paths while simplifying control to a single continuous path, directly resolving the technical contradiction between adaptability and device complexity.

Inventive Principle:

Principle #5Merging (Combining)

2Manufacturing precision

If the cutting tool follows the same approximate path multiple times due to overlapping lines, then complete coverage of the pattern is achieved, but the time required for cutting increases and efficiency decreases

Engineering Contradiction:

Improvecomplete coverage of the patternVSAvoidcutting efficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent extracts and removes overlapping redundant path segments from the cutting sequence. By identifying intersections and eliminating duplicate coverage areas, the system maintains complete pattern coverage while significantly reducing redundant cutting operations, thus improving productivity without sacrificing manufacturing precision.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of manufacture

If the thickness of the cut (kerf) is not compensated for, then the cutting process is simple, but the final cut item does not match the pattern dimensions

Engineering Contradiction:

Improvesimplicity of the cutting processVSAvoiddimensional accuracy of the final cut item

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by pre-calculating and compensating for kerf width during the path generation phase. The system adjusts the cutting path positions in advance to account for material removal, ensuring dimensional accuracy is built into the cutting sequence before execution, thereby maintaining both ease of manufacture and manufacturing precision.

Inventive Principle:

Principle #10Preliminary action

4Ease of operation

If narrow areas of the pattern are cut without considering kerf width, then the cutting process is straightforward, but over-cutting occurs and narrow areas fail to be successfully cut

Engineering Contradiction:

Improvestraightforwardness of the cutting processVSAvoidsuccess rate of cutting narrow areas

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent applies local quality by implementing kerf compensation specifically in narrow areas where it is most critical. The system identifies narrow regions and applies localized path adjustments to prevent over-cutting, while maintaining straightforward cutting processes in broader areas, thus improving reliability without unnecessarily complicating the overall operation.

Inventive Principle:

Principle #3Local quality

5Manufacturing precision

If portions of the pattern are cut completely around, then the cutting is thorough, but the center portions fall out and the pattern integrity is compromised

Engineering Contradiction:

Improvethoroughness of cuttingVSAvoidintegrity of the pattern

Core Design Contradiction:

Manufacturing precisionVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary anti-action by identifying enclosed areas that would completely surround portions of the pattern and modifying the cutting path in advance to prevent fallout. The system creates intentional uncuts or modifies intersection handling to maintain pattern integrity while still achieving thorough cutting of all areas, thus preventing the harmful effect before it occurs.

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS9304505B2Method of forming a cut-path

Publication Date: 2016.04.05 IFE FOUND

AI summary

A method of forming a cut path that includes the steps of selecting a first image line and a second closed image line surrounding an enclosed area, Overlying the second closed image line on the first image line and identifying a pair of intersections between the first image line and the second closed image line, and making a determination to turn one of right or left at both of the intersections of the pair of intersections to add portions of the second closed image line lying between the intersections with portions of the first image line to form a cut-path.