公开(公告)号：US20220331900A1

公开(公告)日：2022-10-20

申请号：US17760735

申请日：2020-09-08

申请人： AMADA CO., LTD.

发明人： Fujinari ITOSHIRO ,  Hironobu MIYOSHI ,  Jun IWASAKI

IPC分类号： B23K26/03 ,  B23K26/38 ,  B23K31/10

摘要： A reflected beam detector detects a reflected beam reflected from a sheet metal when the sheet metal is irradiated with a laser beam so that the sheet metal is cut. A processing state determination unit is provided with a standard deviation value calculation unit and a quality determination unit. The standard deviation value calculation unit calculates, in a predetermined calculation cycle, a standard deviation value of a reflected beam detection value at a monitoring wavelength from among reflected beam detection values in a predetermined wavelength band output from the reflected beam detector. The quality determination unit determines whether or not a burning defect has occurred in which a cut surface of the sheet metal is excessively melted based on a comparison result of comparing, with a first threshold value, the standard deviation value calculated by the standard deviation value calculation unit.