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钣金加工结构件焊接时的注意事项
浏览: 发布日期:2018-10-29

结构件焊接时只有按照正确的方法,还有注意一些在操作时的注意事项,才能够保证结构件焊接的质量,也才能够保证结构件焊接时的安全,因此为了能够保证结构件焊接顺利进行,为大家介绍结构件焊接注意事项。

Only in accordance with the correct method when welding structural parts, there are some points for attention in the operation, in order to ensure the quality of structural parts welding, but also to ensure the safety of structural parts welding, so in order to ensure the smooth progress of structural parts welding, for everyone to introduce structural parts welding points for attention.

一、电弧的长度

Arc length

电弧的长度与焊条涂料种类和药皮厚度有关系。但都应尽量采取短弧,特别是低氢焊条。电弧长可能会产生气孔。短弧能够避免大气中的O2、N2等有害气体入侵焊缝金属,形成氧化物等不良杂质而影响焊缝质量。

The length of the arc is related to the type of coating and the thickness of the coating. However, short arc should be used as much as possible, especially low hydrogen electrode. The length of the arc may produce pores. Short arc can avoid harmful gases such as O2 and N2 from atmosphere invading weld metal, forming oxide and other undesirable impurities and affecting weld quality.

二、结构件焊接速度

Two. Welding speed of structural parts

适宜的焊接速度是以焊条直径、涂料类型、焊接电流、被结构件焊接物的热容量、结构开头等条件有其相应变化,不能作出标准的规定。保持适宜的焊接速度,熔渣能很好的覆盖着熔潭。使熔潭内的各种杂质和气体有充分浮出时间,避免形成焊缝的夹渣和气孔。在结构件焊接时如运棒速度太快,结构件焊接部位冷却时,收缩应力会增大,使焊缝产生裂缝。

Suitable welding speed is based on the electrode diameter, coating type, welding current, the heat capacity of the welded parts, the beginning of the structure and other conditions have corresponding changes, can not be standardized. To maintain proper welding speed, slag can well cover the molten pool. So that all kinds of impurities and gases in the molten pool have sufficient time to float, avoiding the formation of slag and air holes in the weld. If the moving speed of the rod is too fast, the shrinkage stress will increase and the weld cracks will occur when the welding part of the structure is cooled.

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