公开(公告)号：US20230150065A1

公开(公告)日：2023-05-18

申请号：US17916531

申请日：2021-03-26

Applicant: MAEDA CORPORATION ,  TOYOKOH CO.,LTD.

Inventor： Yuji SHIRANE ,  Takehiro MISAKA ,  Kenji MARUYAMA ,  Takayuki OBARA ,  Kenjiro MOMI ,  Kazuhisa FUJITA ,  Takahiro UTSUGITA ,  Manabu HARAGUCHI

IPC: B23K26/354 ,  B23K26/082 ,  B23K26/364

CPC classification number: B23K26/354 ,  B23K26/082 ,  B23K26/364 ,  B23K2103/50

Abstract: Disclosed is a way of providing a surface processing method for concrete in which vitrifying is suppressed even when high-speed processing is performed. In a surface processing method of concrete, a surface of the concrete is irradiated with a laser beam so that a beam spot is scanned along a predetermined scanning pattern and the scanning pattern moves along the surface at a predetermined feed speed. When the beam spot repeatedly passes through a predetermined portion in the scanning pattern, an overlap ratio, which is a ratio of overlapping of a passage path of the beam spot over a passage path of the beam spot in an immediately preceding irradiation, is 90% or less.