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Vacuum vessel in Europe

Fitting the pieces virtually

10 May 2021
A "virtual fit" tool developed by the European Domestic Agency is helping the vacuum vessel manufacturing team anticipate the challenge of final assembly—the moment when four sub-segments are brought together and welded to form the final 440-tonne sector.  By visualizing alignment challenges and eventual clashes or gaps, the team is saving time and reducing risk.
05_VVsectors_3_web.jpg
Contractors at Mangiarotti (Italy) carry out ultrasound tests on the PS1 segment of vacuum vessel sector #5. Four poloidal segments will be aligned and welded to form one 40-degree section of the 澳门六合彩高手 vacuum vessel.
Each D- shaped 澳门六合彩高手 vacuum vessel sector is an assembly of four smaller manufactured pieces—the inboard, upper, equatorial and lower poloidal segments. In the final production stage, the completed segments, which weigh approximately 100 tonnes each, must be brought together on an assembly platform to be aligned within exacting tolerances and welded.  

With only millimetres to spare and huge components to be adjusted by crane, the operation is a challenging one. For vacuum vessel sector #5—the first in the European series—Fusion for Energy has introduced a virtual tool that takes metrology data from the completed segments and fits them together virtually, in advance of the actual operation.

The tool is capable of generating a simulation based on more than 1 million surveyed points, and highlighting various interface zones. By simulating different alignment scenarios, the contractors are able to arrive at the best and most optimized fit solution.

"It helps project managers to minimize risks and have a precise control of the assembly," explains Fusion for Energy metrology expert Alessandro Lo Bue, who worked with colleague Edoardo Pompa (SETIS Groupe Degaud) to build the methodology for virtual fitting from specialized software (SpatialAnalyzer?).

The tool has been in use for vacuum vessel sector #5 since November 2020.

See a report on the Fusion for Energy website .

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