Influence Factors and Technological Research of Thick Plate Flame Cutting

CHEN Limin; ZHOU Yun; SONG Shihe

doi:10.7512/j.issn.1001-2303.2024.05.14

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Influence Factors and Technological Research of Thick Plate Flame Cutting
Vol. 54, Issue 5, Pages: 98-103(2024)
Published： 25 May 2024 ，
DOI： 10.7512/j.issn.1001-2303.2024.05.14

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陈立敏，周昀，宋世和.厚板火焰切割的影响因素及工艺性研究［J］.电焊机，2024，54（5）：98-103.

CHEN Limin, ZHOU Yun, SONG Shihe.Influence Factors and Technological Research of Thick Plate Flame Cutting[J].Electric Welding Machine, 2024, 54(5): 98-103.
陈立敏，周昀，宋世和.厚板火焰切割的影响因素及工艺性研究［J］.电焊机，2024，54（5）：98-103. DOI： 10.7512/j.issn.1001-2303.2024.05.14.

CHEN Limin, ZHOU Yun, SONG Shihe.Influence Factors and Technological Research of Thick Plate Flame Cutting[J].Electric Welding Machine, 2024, 54(5): 98-103. DOI： 10.7512/j.issn.1001-2303.2024.05.14.

摘要

利用JMP分析软件对燃气流量、燃比、割嘴高度、切割速度以及切割氧压力对厚板火焰切割质量的影响进行试验设计（DOE），分析各因子对质量响应的影响程度，并进行相关参数优化。选取180 mm厚的Q235B钢板，使用C

作为燃气进行切割试验。结果表明：对于厚板火焰切割，切割氧压力不宜过高，表面凹槽对压力敏感；预热火焰应选偏碳化焰，火焰长，温差小，对切割氧保护效果佳，表面质量高；割嘴高度不宜过高；燃气流量要适中，否则会有上熔边及上方凹陷，无法保证上缘直角边。利用此试验参数优化技术，分别用C

、CH

、C

以及新研发的“氢锋”气体分别对180 mm碳钢板进行切割试验，均得到良好的切割效果，验证了优化技巧的普适性。

Abstract

Using JMP analysis software for experimental design (DOE) to study the impact of gas flow rate

fuel-to-gas ratio

cutting nozzle height

cutting speed

and cutting oxygen pressure on the quality of thick plate flame cutting

and analyzing the extent of the impact of each factor on quality response

as well as optimizing the relevant parameters accordingly. A 180 mm thick Q235B steel plate was selected for cutting experiments using C3H8 as the experimental gas. The results show that for thick plate flame cutting

the cutting oxygen pressure should not be too high

as the surface groove is sensitive to pressure; the preheating flame should be a slightly carburizing flame

with a longer flame and smaller temperature difference

which is beneficial for the protection effect of cutting oxygen and results in higher surface quality; the cutting nozzle height should not be too high; the gas flow rate should be moderate

otherwise

there will be an upper melting edge and a concave upper part

which cannot ensure a right-angle edge on the upper rim. Utilizing this experimental parameter optimization technique

quality cutting tests were conducted on 180 mm carbon steel plates using propane

natural gas

acetylene

and the newly developed "Hydro Edge" gas

all of which yielded good cutting results

verifying the universality of the optimization techniques.

关键词

厚板火焰切割影响因素工艺参数

Keywords

plateflame cuttinginfluencing factorsprocess parameters

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