Machine Learning Weld Tracking for Missing Weld Identification

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Solution Overview

Problem

Conventional part tracking systems cannot identify which specific welds were missed during the assembly process, leading to potential quality issues and inefficiencies in welding operations.

Innovation Solution

Utilizing machine learning techniques to analyze sequential welds and compare them with missing weld part models to identify specific missed welds, enabling real-time or post-process detection and correction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If conventional part tracking systems are used to monitor welds, then the number of welds can be counted, but the specific identity of missed welds cannot be identified

Engineering Contradiction:
Improveinformation about specific missed weldsVSAvoidprecision of weld identification
Core Design Contradiction:
Loss of informationVSMeasurement precision

Solution Approach 1:

The system segments the welding process into individual weld events with unique identifiers, tracking each weld's position, sequence number, and characteristics. This segmentation allows the system to identify which specific welds are missed rather than just counting total welds, resolving the information loss problem.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system implements feedback by continuously comparing actual weld data against the expected weld sequence from the part model. When deviations are detected, the system provides feedback about which specific welds are missing, enabling precise identification of missed welds through iterative comparison and validation.

Inventive Principle:
Principle #23Feedback

2Measurement precision

If machine learning techniques are implemented to identify specific missed welds, then weld identification precision improves, but system complexity increases

Engineering Contradiction:
Improveprecision of weld identificationVSAvoidcomplexity of detection system
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The system performs preliminary actions by pre-defining part models with expected weld sequences and characteristics before the actual welding process. This preparation allows the machine learning system to compare actual welds against predetermined patterns, improving identification precision without requiring complex real-time analysis of every weld parameter.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system creates simplified digital copies (part models) of the expected weld patterns and sequences. These models serve as reference templates that the machine learning system compares against actual weld data, enabling precise identification of missed welds while keeping the system complexity manageable through pattern recognition rather than full physical simulation.

Inventive Principle:
Principle #26Copying

3Measurement precision

If detailed analysis of each weld is performed to identify missed welds, then detection precision improves, but processing time increases

Engineering Contradiction:
Improveprecision of missing weld detectionVSAvoidtime for weld analysis
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system applies partial action by focusing analysis on critical weld characteristics and sequence patterns rather than examining every parameter of each weld in detail. The machine learning model is trained to identify the most discriminative features for detecting missed welds, achieving high detection precision while reducing processing time through selective feature analysis.

Inventive Principle:
Principle #16Partial or excessive action

Solution Approach 2:

The system performs preliminary filtering and pre-processing of weld data to identify anomalies and potential missed welds before conducting detailed analysis. By pre-sorting and prioritizing weld events based on sequence expectations and characteristic patterns, the system reduces the computational burden of detailed analysis and accelerates the overall detection process.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS12454026B2Systems and methods for identifying missing welds using machine learning techniques
Publication Date: 2025.10.28 ILLINOIS TOOL WORKS INC
  • US12454026B2 patent drawing
  • US12454026B2 patent drawing
  • US12454026B2 patent drawing

AI summary

Systems and methods for missing weld identification using machine learning techniques are described. In some examples, a part tracking system uses machine learning techniques to identify whether an operator has missed one or more welds when assembling a part. The part tracking system may additionally identify which specific welds were missed (e.g., the first weld, the third weld, the fifteenth weld, etc.). The part tracking system may be able to identify missing welds after a part has been completed, or in real-time, during assembly of the part. Identification of the particular weld(s) missed during the welding process can help an operator quickly assess and resolve any issues with the part being assembled, saving time and ensuring quality.