大型重载复杂轮廓真空室领圈焊接变形控制

The welding deformation control of large complex heavyload vacuum chamber window collar rings

窗口领圈是聚变堆真空室的关键部件,在与真空室窗口颈管焊接成一体后不能整体加工矫形,所以对窗口领圈制造精度和质量要求很高.为获得较高的制造精度,采用相对于其它熔焊变形量较小、精度较高的电子束焊接对CFETR窗口领圈进行拼焊,根据固有应变理论计算出焊接的固有应变量导入软件,模拟窗口领圈在不使用夹具约束时四种拼焊方案的焊接变形情况,确定最优的焊接顺序和夹具约束方案,再对使用夹具约束时窗口领圈的焊接变形进行计算模拟.结果表明,窗口领圈采用不同的焊接顺序,变形量也各不相同,夹具约束能有效减小焊接变形.其结果为窗口领圈的实际拼焊过程提供了参考.

In order to obtain high manufacturing precision, CFETR window collar ring is welded into a integrity by EBW which has features of higher precision, smaller deformation than other fusion welding methods. According to the inherent strain theory, the inherent strain of EBW welding is calculated, then the result is imported into software.Simulation of welding deformation of four kinds of collar ring welding program without clamp is to determine the optimal welding sequence and fixture constraints, and then the simulation of welding deformation of four kinds of collar ring welding program with clamp were done. The results show that window collar with a different welding sequence results in different welding deformation. Fixture constraint can effectively reduce welding deformation. The results provide a reference for the actual welding process of window collar ring.