公开(公告)号：US5218181A

公开(公告)日：1993-06-08

申请号：US743421

申请日：1991-08-22

Applicant: Toshiya Shintani

Inventor： Toshiya Shintani

IPC: B23K10/00

CPC classification number: B23K10/00

Abstract: The present invention is used as a method and an apparatus for effecting piercing start on a member to be To enable a suitable piercing start and good cutting qualities, a slag-deposition preventive (14) is applied to a portion to be pierced of a member (30) to be cut and the vicinity of the same, and a piercing start is thereafter effected, thereby preventing the slag from being deposited on the portion to be pierced and in the vicinity of the same. The apparatus has a reciprocatingly movable carriage (11) on which a plasma torch (12) of a plasma cutter mounted. An applicator (10) for applying the slag-deposition preventive is mounted on the carriage, the applicator being capable of moving together with the plasma torch (12). The apparatus is arranged to easily apply the preventive (30) to a selected portion of the member (30) to be cut.