Steel Works steel welding operation process:

Process

Cleanup welding parts → Check member assembly quality → Adjust welding parameters → Press the logical sequence welding → self, cross check records → test grade inspectors check

Operation Process

(1) General Provisions

① should review the handling of the assembly before welding quality and welding area when not meet the requirements, should be trimmed after passing the welding.

② butt joint, automatic welding corner joints and requires full penetration welds, and the drawing board should be set up at both ends of the arc weld bead, the material and groove forms should be the same as the weldment. SMAW should be greater than 20mm. After the removal of solder lead plate with gas cutting and grinding smooth.

③ arc weld should be at, can not scratch the base metal.

④ landing pitch arc welding seam when the ends should be greater than 10mm, the crater should be filled.

⑤ multilayer welding continuous welding should pay attention to cleaning and inspection between layers, defective should be promptly removed after welding.

⑥ weld cracks when you want to find out the reasons set out after the repair process in the treatment.

⑦ repair weld repair process should be carried out, the repair should not exceed the number of times the same place twice.

Not in the open welding ⑧ rain and snow. In more than four wind-welded, should take their precautions.

Select welding parameters

SMAW process specification parameters are: welding current, electrode diameter and welding level. Select Steel Works welding parameters should be ensuring the quality of welding conditions, the use of large diameter electrodes and high current welding, in order to improve labor productivity.

Select electrode diameter

Electrode diameter is generally based member thickness and welding position to choose, Table 3.1.6.2-1. Alternatively flat welding electrode diameter bigger, when vertical welding electrode diameter of not more than 5mm, Yang and horizontal welding rod maximum diameter 4mm, multi-layer welding electrode diameter and groove of the first layer of weld used is 3.2 ~ 4mm.