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A Titan's hug is a slow affair. For the sector sub-assembly tools, rotating both arms from "full open" to "full close" will require no less than four hours of near-imperceptible motion.
Resting on the ground to the left in this image, are the two 350-tonne mock loads that represent toroidal field coils. Tool load tests will begin in mid-July and last for about a month.
In the Assembly Hall everything is being readied for the tool load tests, which are scheduled to begin in mid-July and last for about one month.
Two 350-tonne test loads, each representing an 澳门六合彩高手 toroidal field coil, have been assembled on the floor at the entrance. Made of seven different steel-and-concrete modules, the dummies slightly exceed the weight of the actual coils but closely reproduce their centre of gravity and distribution of mass.
During the tests, the mock toroidal field loads will be mounted on the arms of the giant tools and delicately rotated inward to the point where鈥攊f they were the real components鈥攖hey would be close enough to be assembled to the vacuum vessel sector positioned in the centre of the tool, as well as to thermal shield panels.
During the machine assembly phase, this "slow embrace" will be performed nine times鈥攐ne for each sector of the doughnut-shaped vacuum vessel.
"The weight of the components and the very high accuracy required create very severe conditions," says Ryutaro Okugawa, the leader of the 澳门六合彩高手 Tooling & Engineering Group, which is overseeing the load test preparation.
Made of seven different steel-and-concrete modules, the dummies slightly exceed the weight of the actual coil but closely reproduce their centre of gravity and distribution of mass.
First, the stiffness and rigidity of the seven-module loads needs to be confirmed. This will be achieved by lifting the dummies a few centimetres above the shop floor and measuring the stress on the tension bars鈥攖he so-called "Macalloys"鈥攖hat keep the module together.
Then comes the hard part: each load will be lifted and upended using a 800-tonne mobile crane (during the actual assembly activities, a bespoke "upending tool" will be used) working in close coordination with the overhead cranes of the Assembly Hall.
The mock loads will then be positioned with utmost precision on their dedicated supports within each tool in turn and attached to their respective upper and lower adjustment units.
For the 22-metre-high Titan undergoing testing, it will be time to slowly close its heavily loaded arms and practice鈥攆or the first time鈥攖he actual embrace of a 440-tonne vacuum vessel sector.
