Codesign of customer piece
We perform FSW feasibility analysis, suggesting design adaptations to get the part ready for FSW and to optimize FSW process.
Design and manufacturing of clamping jig
It must be taken into account:
- Number of clamps
- Clamping force
- Tool wear
- Tool path
Welding parameters and quality control
- Choice of the FSW tool
- Welding force
- Tool rotation speed
- Welding speed
- Plunging speed
These FSW parameters will optimize the part production while assuring a perfect and reproducible weld.
All this information is synthesized is a document called WPS: Welding Procedure Specification.
DMOS-QMOS approach applied to FSW welding (mainly used in aerospace and automotive).
The DMOS (welding procedure EN ISO 15609) lists the welding materials and the steps of the welding process :
-preparation before welding,
-setting welding parameters,
-right choice of FSW tool.
The QMOS (welding procedure qualification) occurs during the welding operation, carried out in strict execution of the associated DMOS. It certifies the reliability of the weld concerned.
For FSW projects that do not require an aeronautical standardization approach, we apply the standard ISO 25239.
Extract of Stirweld WPS (Welding Procedure Specification ISO 25239)
Manufacturing of first batches
Support & optimization after launch in Customer’s facilities
Perform 5 metallographic cross sections and analysis per part on indicated zones.
- The first part at the beginning of each shift (3 parts/day)
- If all parts OK during one entire week: one part per day
- If all parts OK during one entire month: one part per 2 days
If any part is not OK in any of the steps, Stirweld support will quickly help to solve it.
Stirweld has already supported the implementation of FSW through this industrial study to companies like:
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