Series production of the toroidal field (TF) coils for the ITER has been launched since Oct. 2013. In advance of manufacturing of the actual products, we have performed the preliminary tests and mock-up tests to clarify and confirm the conditions of the welding and machining processes. The ITER TF coil is a welded-structure to endure strong magnetic forces, and it is a huge component in the ITER machine with dimensions of 16.5m height and 9.0m width and a weight of more than 300 ton per coil. In addition, dimensional requirements to the TF coil are very tight from a view point of stable plasma confinement. In the following section, features of the ITER TF coil are briefly introduced, and performance tests of manufacturing technologies such as welding processes are described, and typical results are summarized. In order to suppress welding deformation, combination method of Tungsten-inert gas welding(TIG) and beam welding(such as an Electron Beam Welding (EBW) and a Laser Beam Welding (LBW)) has been applied to a thick plate weld. Furthermore, process conditions of the EBW and LBW suitable for the thick plate have been investigated to improve work efficiency.
展开▼
机译：自2013年10月以来，已开始批量生产用于ITER的环形场（TF）线圈。在生产实际产品之前，我们已进行了初步测试和模型测试，以澄清和确认焊接条件和加工过程。 ITER TF线圈是一种焊接结构，可以承受强大的磁力，它是ITER机器中的巨大组成部分，其尺寸为16.5m高和9.0m宽，每个线圈的重量超过300吨。另外，从稳定的等离子体限制的角度出发，对TF线圈的尺寸要求非常严格。在以下部分中，将简要介绍ITER TF线圈的功能，并描述制造技术（例如焊接工艺）的性能测试，并总结典型的结果。为了抑制焊接变形，已将钨极惰性气体保护焊（TIG）和电子束焊接（例如电子束焊接（EBW）和激光束焊接（LBW））的组合方法应用于厚板焊接。此外，已经研究了适用于厚板的EBW和LBW的工艺条件，以提高工作效率。
展开▼
