中厚钢板大功率固体激光切割模式

High power solid-state laser cutting mechanism of thick steel plates with O2

关键词:  激光切割  切割机理  中厚板切割  大功率固体激光

Key words:  laser cutting  cutting mechanism  thick steel plate cutting  high power solid-state laser

摘要:

对30mm厚钢板进行大功率固体激光切割试验,研究了主要工艺参数对切割特性的影响,揭示了中厚板激光切割的传热机理.结果表明,中厚板激光切割时呈现窄缝和宽缝两种切割模式,氧气压力和激光离焦量对窄缝-宽缝切割模式转变有很大的影响.窄缝横截面呈现出较平直的"I"型,宽缝横截面呈现出上宽下窄的"V"型.

Abstract:

6 kW disk laser-oxygen cutting experiment on 30 mm thick steel plate was carried out to reveal the thick plate laser cutting mechanism. The influence of main process parameters on laser cut quality was investigated. The results indicated that two laser cutting modes, i.e., narrow kerf mode and wide kerf mode were found when performing thick plate laser cutting. Oxygen pressure and laser defocused distance had a significant influence on transformation between two laser cutting modes. Cross section of wide kerf was found to be V type, while narrow kerf is I type. The kerf surface of two laser cutting modes was observed, indicating two different laser cutting processes.