摘要
通过对于双尖角磁场再压缩等离子弧的电弧形态、电特性、热特性、力学特性及电弧稳定性的测定与分析,说明采用双尖角磁场再压缩等离子弧沿电弧截面长径方向进行切割是提高切口质量、工艺稳定性和切割生产率的有效途径。本文介绍了采用此方法对16～20mmlCr18Ni9Ti钢板切割的试验结果,并就双尖角磁场的磁头结构、再压缩等离子弧的物理特征及工艺特性、切割规范选择的特点以及切口质量进行了探讨。
From a test and analysis of a plasma arc which is under the re-constriction of dual-cusp magnetic field (DCMF) for its appearance, its electrical, mechnical and thermal characteristics, as well as its stability, it is found that using a DCMF re-constriction plasma arc and cutting along the major axis of its cross-section is able to effectively improve cut quality, process stability and cutting productivity. Given in this paper are the results from the cutting tests on 16～20mm 1Cr18Ni9Ti plates, also given are discussions on the structures of DCMF magnetic head, the physical features and technological characteristics of DCMF re-constriction plasma arc, and on the choice of cutting parameters and the uniqueness of cut quality.
关键词
等离子弧
磁场
切割
plasma arc
magnetic field
cutting
