CO_2气体保护自动焊在钢构件制作中的应用实践

Application practice of CO_2 gas shielded automatic welding onsteel structure construction

简述钢结构件的用途和市场状况:钢结构件焊接量大,要求高;CO2气体保护自动焊与手工电弧焊相比,可提高效率3～5倍,节省焊接材料58%,节电43%,具有焊接成本低、效率高、焊缝成型好、可操作性强等特点,应用广泛。CO2气体保护自动焊焊接设备主要由焊接电源、焊接机头、焊接小车、操作台等组成。对焊接设备各部分功能进行分析,给出焊接电压、焊接电流、焊接速度、送丝速度等工艺参数,并就焊丝伸出量、CO2气体流量、焊丝质量等对焊接的影响作重点分析。以焊接吊车梁为例,说明焊前准备、焊接、焊缝修整等焊接工艺过程及注意事项。

To narrate the application and market status of steel structure part： the working of steel structure part welding is big, requirements are high; comparing with manual arc welding, CO2 gas shielded automatic welding can raise efficiency from 3 to 5 times, save welding material 58% , save electricity 43% , it has the characteristics of low welding cost, high efficiency, welding bead good profile, strong operation, and it is used widely. The welding device of CO2 gas shielded automatic welding mainly has welding power, welding machine head, welding vehicle, operating table and so on. The function of each part is analyzed. The parameters of welding voltage, welding current, welding speed, wire feeder velocity etc. are given out. The influence of welding wire stretch, CO2 gas flow, welding wire quality on welding is analyzed. Taking welding crane beam as an example, the welding process such as before welding preparation, welding, welding beam finishing and attention item is explained.