US 12,330,191 B2
Alien substance removing apparatus and electrical steel sheet manufacturing facility having thereof
Seong-Cheol Hong, Pohang-si (KR); Ki-Young Min, Pohang-si (KR); Se-Min Park, Pohang-si (KR); Dong-Geun Kim, Pohang-si (KR); Oho-Cheal Kwon, Pohang-si (KR); Chang-Ho Kim, Pohang-si (KR); and Sang-Uk Ha, Pohang-si (KR)
Assigned to POSCO CO., LTD, Pohang-si (KR)
Appl. No. 17/312,668
Filed by POSCO, Pohang-si (KR)
PCT Filed Dec. 11, 2019, PCT No. PCT/KR2019/017445
§ 371(c)(1), (2) Date Jun. 10, 2021,
PCT Pub. No. WO2020/122575, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 10-2018-0160645 (KR), filed on Dec. 13, 2018.
Prior Publication US 2022/0048136 A1, Feb. 17, 2022
Int. Cl. B08B 1/30 (2024.01); B08B 1/12 (2024.01); B08B 1/16 (2024.01); B08B 15/02 (2006.01); B23K 26/16 (2006.01); B23K 26/36 (2014.01); B23K 26/364 (2014.01); C21D 10/00 (2006.01)
CPC B08B 1/30 (2024.01) [B08B 1/12 (2024.01); B08B 1/165 (2024.01); B08B 15/02 (2013.01); B23K 26/16 (2013.01); B23K 26/36 (2013.01); B23K 26/364 (2015.10); C21D 10/005 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A foreign object removing apparatus, comprising:
a hood unit configured to collect a foreign object generated from an electrical steel sheet by laser irradiation; and
a scraping unit coupled to the hood unit, and configured to scrape and remove the foreign object attached to one surface of the hood unit facing the electrical steel sheet,
wherein the scraping unit comprises:
an expansion and contraction driving unit coupled to the one surface of the hood unit facing the electrical steel sheet; and
a scraper unit coupled to an end portion of a rod member of the expansion and contraction driving unit, wherein the rod member is expandable and contractable, and the scraper unit is configured to reciprocate in close contact with the one surface of the hood unit facing the electrical steel sheet,
wherein the hood unit comprises:
a cooling block member disposed on the electrical steel sheet, the cooling block member including:
a slit hole through which the irradiated laser passes; and
a cooling passage through which a cooling fluid flows and to which the scraping unit is coupled on the one surface of the hood unit facing the electrical steel sheet, and
in order that the rod member is disposed away from the slit hole and the scraper unit is evenly disposed on the cooling block member, the rod member of the expansion and contraction driving unit is coupled to the scraper body of the scraper unit at a position adjacent to a side end portion of the cooling block member.