CFETR窗口领圈焊接工装设计与焊接过程分析

Design of Welding Fixture and Welding Process Analysis of CFETR Window Collar

真空室窗口领圈是用于连接中国聚变工程实验堆真空室内部和外部颈管的连接段,由于其三维结构复杂、体积庞大、质量大,在与真空室窗口焊接成一体时无法整体加工矫形。因为窗口领圈需要与双曲面结构真空室主体贴合对接,所以对其制造精度要求较高。为了保证真空室的建造质量,采用一种微变形的高束焊接方法——真空电子束焊接对窗口领圈进行拼焊。以焊接零部件为基础,设计了一套焊接工装进行装夹固定,按照电子束焊缝的形貌特征,模拟电子束热源(由双椭球体热源和三维高斯体热源复合),运用SYSWELD软件进行焊接过程分析,结果验证了所设计的工装可以满足焊接需求。

The vacuum chamber window collar has been used to connect the internal and external neck tubes of the vacuum chamber of the China Fusion Engineering Test Reactor. Because of its complex three-dimensional structure, huge volume and large quality, it can not be processed and orthodontically welded into the vacuum chamber window as a whole. Because windaw collar needs to be fitted and docked with the main body of the hyperboloid vacuum chamber, which also needs high manufacturing accuracy. In order to ensure the construction quality of the vacuum chamber, a micro-deformation high beam welding method, namely vacuum electron beam welding, was used to tailor the window collar, which based on the welding parts, a set of welding equipment has been designed to clamp and fix. According to the morphological characteristics of the electronic beam welding seam, the electronic beam heat source (composed of double ellipsoid heat source and three-dimensional Gauss heat source) has been simulated. The welding process has been analyzed with SYSWELD software, the result has been verified the designed clamp craft equipments can meet the welding requirements.