大型容器中环缝坡口的形状是根据焊接技术要求的不同而形成,加工的难度大,尤其对保证薄壁大直径容器中的封头坡口成形,其加工要求难度更大,只有在保证坡口被完全加工出来的条件下,才能确保对接环缝的成形和焊缝质量。 我厂在制造MSR核电大直径容器封头、筒节的纵环缝坡口生产中,全部采用机械加工,特别是封头环缝坡口的加工,由于采用了自行研制的特殊 The shape of gasholding groove in large container is formed according to different technical requirements of welding and it is very difficult to process. Especially for forming the groove of gash head in thin-walled large-diameter container, the machining requirements are more difficult. The mouth is fully processed out of conditions, to ensure that the butt joint forming and weld quality. I plant in the manufacture of MSR nuclear large diameter container head, the longitudinal section of the cylinder joints groove production, all using mechanical processing, especially the first girth bevel groove processing, due to the use of self-developed special