Study on relationship between radiation and quality for laser cutting

ZHANG Yong-qiang; WU Yan-hua; CHEN Wu-zhu; ZHANG Xu-dong

In order to study the relationship between optical signal and cutting quality,an on-line monitoring system with cut front radiation as the criterion for laser cutting was built up.The signal was studied in time-domain and frequency-domain.The analysis in time-domain shows that there is little fluctuation for free defect,while the reverse for the defects.The analysis in frequency-domain shows that when the cutting speed is slower than that of combustion reaction,the dominant frequency relates to the waviness frequency of cut front.The combustion cycle is the main reason of both cutting waviness and main frequency of optical signal.

Corresponding author: ZHANG Yong-qiang, cwz-dme@mailtsinghuaedu.cn;

1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

Received Date: 2006-05-08

Accepted Date: 2006-06-27

Available Online: 2007-08-25

Abstract: In order to study the relationship between optical signal and cutting quality,an on-line monitoring system with cut front radiation as the criterion for laser cutting was built up.The signal was studied in time-domain and frequency-domain.The analysis in time-domain shows that there is little fluctuation for free defect,while the reverse for the defects.The analysis in frequency-domain shows that when the cutting speed is slower than that of combustion reaction,the dominant frequency relates to the waviness frequency of cut front.The combustion cycle is the main reason of both cutting waviness and main frequency of optical signal.

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Reference (9)

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Study on relationship between radiation and quality for laser cutting

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References

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