影响等离子弧切割质量与速度的重要原因,是在引弧或切割过程中出现的双弧。一旦有双弧出现,就必须立即停止切割,否则将会烧毁喷嘴、损坏工件。实践表明,产生双弧的原因很多,除所用气体(多为氮气)不纯外,一般还有如下原因:1.钨棒不在喷嘴压缩孔道的中心位置;2.喷嘴严重烧损,并带有缺陷。 An important reason that influences the quality and speed of plasma arc cutting is the double arc that occurs during arc starting or cutting. In the event of a double arc, it must be immediately stopped cutting, or it will burn the nozzle, damage to the workpiece. Practice has shown that there are many reasons for the generation of double arc, in addition to the gas used (mostly nitrogen) impure, there are generally the following reasons: 1. Tungsten rod is not in the nozzle compression center of the hole; 2. defect.