_钢结构手工电弧焊工艺标准(国外英文资料).doc

_钢结构手工电弧焊工艺标准(国外英文资料) This technology is applicable to general industrial and civil construction of steel structure manufacture and installation manual electric arc welding engineering. The 2.1 main materials and equipment: 2.1.1 welding: the models chosen according to design requirements, must have the certificate of quality. According to the requirements before welding after baking. It is prohibited to use medicine skin shedding, rusted core wire electrode. If there is no design requirement, it is reasonable to select the E43 series of Q235 steel welded steel structure welding; 16Mn steel welding should choose E50 series low alloy steel electrode; welding structure should adopt low hydrogen electrode (alkaline electrode). According to the specification requirements after baking, in heat insulation barrels, used with the check. Acid electrode and alkaline electrode to mixed use. 2.1.2 arc plate with groove connection with arc plate, the arc plate material and slope type should be the same as the weldment. 2.1.3 main equipment: electric welding machine (AC and DC), welding wire, welding tongs, mask, hammer, welding electrode oven, heat insulation barrels, wire brush, asbestos cloth, thermometer etc.. 2.2 operating conditions Familiar with 2.2.1 drawings, welding technology. 2.2.2 welding should be checked before the qualified certificate of validity, shall prove that the welding welder can bear. 2.2.3 field power supply should meet the electricity requirements of welding. 2.2.4 environment temperature lower than 0 DEG C for preheating, heat temperature should be determined according to the test process. 3.1 process Ready to arc welding (welding, welding, horizontal welding, overhead welding, weld inspection) 3.2 steel structure arc welding: 3.2.1 flat Select the appropriate welding process, 3.2.1.1 electrode diameter, welding current, welding speed, length of arc welding, the welding process test. 3.2.1.2 welding: welding inspection clearance groove assembly space