焊缝修复方案(1)

ZPMC

约旦RTG开裂修复方案Repair proposal of Jordan’s RTG crack

支腿与鞍梁的联系焊缝返修

The connective fillet weld repair of the leg and saddle beam 一、先将小车开到龙门架靠动力房一侧，远离待维修的支腿。

First drive the trolley to the power room side of the gantry, keep it away from the leg to be repaired.

二、对支腿与鞍梁的四周联系焊缝进行MT+UT检验，确定裂纹范围以及深度。

Second, have a MT+UT inspection of the leg and saddle beam’s roundabout connective fillet weld in order to determine the scope and depth of the crack.

三、对焊缝处进行返修：repair the connective welding

1、对于有裂纹的焊缝，在发现裂纹处打应力孔后，采用碳棒将焊缝从箱体

外侧碳刨开，并进行打磨清理，做MT检验合格后再进行修补施焊。焊接时先焊箱体内侧焊缝，内侧焊缝焊完后，从外侧碳刨清根，再焊接外侧角焊缝，焊接完成后进行焊缝表面打磨，做UT+MT检验。具体操作过程参考附图1。

注：在油箱鞍梁面板修复时，注意将油箱油放空，清洗，通风一段时间后再施焊。

Make the stress release hole where we found the crack.We should use the carbon rods to dig out the fillet weld of the external cabinet and grind it to be clean. We will weld after the MT inspection has passed. To begin with, we should weld the internal part of the cabinet and then root back gouge outside. Second, we should fillet weld from outside. Finally, we grind the surface and have UT+MT inspection. See the figure 1 for the operational process.

Note: Pay attention to empty and clear the oil tank when repairing the plate of the oil tank’s saddle beam. Welding it again after ventilating for a while.

四、返修采用手工焊，用J507焊条。

Adopt manual welding to repair and use J507 welding rod.

五、每根支腿及鞍梁必须是逐条焊缝进行返修，一条焊缝返修合格，再

按上述步骤返修下一条，不允许同时返修多条焊缝。

Repair each leg and saddle beam one by one. If one is qualified,

follow the step to repair the next one. You must not repair several

fillet weld at the same time.

六、焊缝返修检验合格后，按照涂装要求进行油漆。

Follow the painting requirements to paint after the repair

inspection is passed.

七、返修之前需对箱体内外的电缆和电气元件进行保护，返修过程中做

好箱体通风工作。

Protect the cables and electrical components in and out of the

cabinet before the repair. Ventilate the cabinet during the

repair.

八、所有支腿及鞍梁面板开裂焊缝均需按步骤1至7进行补焊，见附图2。

面板修复完成后对角撑端部进行两度补焊。参考附图3所示。

See the figure 2.After that , we should weld the diagonal brace

ends twice. See the figure 3.

九、补焊完成后按附图4所示要求及尺寸对焊缝及焊趾进行打磨。

According to the figure 4’s requirements and size to complete

the weld and grind the fillet weld and weld toes. Attachment 1

Attachment 2

Attachment 3

Attachment 4