big data analytics for process and quality monitoring in ... · big data analytics for process and...
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive PartsJoining Smart Technologies International Automotive Conference 08.05.2019
Luttmer, Michael; Thaler, Heiko; Dongus, Jürgen; Process Engineering
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Fully automated optical weld seam inspection systems (e.g.VIRO VSI from VITRONIC)
Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 2
BasicsMotivation Database Analytics
• Only optical evaluation of theweld seam
• Measuring principle: numerically error based
• Additional inspection station
• No contribution to increaseprocess capability
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 3
BasicsMotivation Database Analytics
• Only optical evaluation of theweld seam
• Measuring principle: numerically error based
• Additional inspection station
• No contribution to increaseprocess capability
Data Analytics on process data to increaseweld seam quality and process capability
Fully automated optical weld seam inspection systems (e.g. VIRO VSI from VITRONIC)
![Page 4: Big Data Analytics for Process and Quality Monitoring in ... · Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts Joining Smart Technologies](https://reader034.vdocuments.net/reader034/viewer/2022050202/5f562ad474f78e2b0346f07d/html5/thumbnails/4.jpg)
Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 4
BasicsMotivation Database Analytics
• Only optical evaluation of theweld seam
• Errors based on meassuringprinciples
• Additional inspection station
• No contribution to increaseprocess capability
Data Analytics on process data to increaseweld seam quality and process capability
Fully automated optical weld seam inspection trough systems such as the
VIRO VSI from VITRONIC
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 5
BasicsMotivation Database Analytics
Consumption [ltr/100km] 10 15
Time [min] 60 45
Distance Stuttgart - Karlsruhe
Approach: Find features with significant correlation to your target
Target Who was speeding?
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 6
BasicsMotivation Database Analytics
Color yellow blue
Add-ons climatronic bending lights
Distance Stuttgart - Karlsruhe
Approach: Find features with an significant correlation to your target
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 7
BasicsMotivation Database Analytics
The „modern“ gas metal arc welding process is a mixture of different process types
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 8
BasicsMotivation Database Analytics
The „modern“ gas metal arc welding process is a mixture of different process types
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 9
BasicsMotivation Database Analytics
The „modern“ gas metal arc welding process is a mixture of different process types
• Controlable heatinput
• Stable arc length
• Better gapbridgeability
• Evenly rippled surface
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 10
BasicsMotivation Database Analytics
How does our Database look like?
• Voltage• Current
• Quality seam
• Pores/Holes• Undercuts
• Offset seam
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Procedure: From process data to weld seam quality
Segmentation Classification Extraction Correlation Result
Automaticsegmentation ofsimilar process
cycles
11
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Procedure: From process data to weld seam quality
Segmentation Classification Extraction Correlation Result
Classification ofthe segments
withunsupervised
learning
12
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Route: From process data to weld seam quality
Segmentation Classification Extraction Correlation Result
Extraction ofstatistical and
process specificfeatures
• Mean• Variance• Skewness• Kurtosis
• Base time• Pulse time• Base current• Pulse current
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Procedure: From process data to weld seam quality
Segmentation Classification Extraction Correlation Result
Analysis ofcorrelation
between processand quality
features
14
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Consumption [ltr/100km] 10 15
Time [min] 60 45
Color yellow blue
Add-ons climatronic bending lights
Basics: The correlation coefficient measures the relation between features and target
Target Who was speeding?15
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 16
BasicsMotivation Database Analytics
Consumption [ltr/100km] High
Time [min] High Correlation-coefficientColor Low
Add-ons Low
Basics: The correlation coefficient measures the relation between features and target
Target Who was speeding?
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 17
BasicsMotivation Database Analytics
Consumption [ltr/100km] 10 15
Time [min] 60 45
Color Pink Blue
Add-ons parkingassistance
bending lights
Basics: The correlation coefficient measures the relation between features and target
Target Which car was driven by a „hipster“?
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Consumption [ltr/100km]
Time [min] Correlation-coefficientColor
Add-ons
Basics: The correlation coefficient measures the relation between features and target
Target Which car was driven by a „hipster“?18
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Consumption [ltr/100km] Low
Time [min] Low Correlation-coefficientColor High
Add-ons High
Basics: The correlation coefficient measures the relation between features and target
Target Which car was driven by a „hipster“?19
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Procedure: From process data to weld seam quality
Segmentation Classification Extraction Correlation Result
Selection ofhigh coefficient
20
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Procedure: From process data to weld seam quality
Segmentation Classification Extraction Correlation Result
HighPulse_meanUCoef. ~0.28
21
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Procedure: From process data to weld seam quality
Segmentation Classification Extraction Correlation Result
HighPulse_meanUCoef. ~0.28
22
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Procedure: From process data to weld seam quality
Segmentation Classification Extraction Correlation Result
HighPulse_stdPCoef. ~0.23
23
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Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
BasicsMotivation Database Analytics
Procedure: From process data to weld seam quality
Segmentation Classification Extraction Correlation Result
stdUCoef. ~0.06
24
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Summary
25
First steps are done- next ones have to follow
• Feasibility studies
• Features in time domains
• Criteria: IO, IOoN, IOmN
Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019
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Summary
Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 26
First steps are done- next ones have to follow
• Feasability studies
• Features in time domains
• Criteria: IO, IOoN, IOmN
• Statistical significance
• Features in frequency domains
• Determination of error types
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Outlook
Big Data Analytics for Process and Quality Monitoring in Gas Metal Arc Welding of Automotive Parts | TF/VRT | 08.05.2019 27
First steps are done- next ones have to follow
• Feasability studies
• Features in time domains
• Criteria: IO, IOoN, IOmN
• Statistical significance
• Features in frequency domains
• Determination of error causes
Bigger data basis, more classified welding errors
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