导电嘴孔径的改进目前，我厂全部采用ＣＯ２气体保护焊代替手工电弧焊，焊接煤矿输送机、转载机、刨煤机等设备。但在长期的使用中，发现存在导电嘴孔径偏小的问题，常常因国产焊丝存在如锈蚀、变形、扭曲、划伤、粗细不均等因素增大了焊丝送进时的阻力，引起焊接过程中焊... Conductive nozzle aperture improvement At present, I plant all the CO2 gas shielded welding instead of manual arc welding, welding coal conveyor, reloader, plow and other equipment. However, in the long-term use, it is found that there is a problem that the diameter of the conductive nozzle is too small, and the resistance of the welding wire is often increased due to factors such as corrosion, deformation, distortion, scratching and uneven thickness of the welding wire, weld...