Komatsu Corporation

Komatsu Industries Corporation

Kazunori Tsunekawa

Yoshihiro Yamaguchi

Shigeo Morimoto

Katsuo Saio

Satoshi Ohnishi

Mikio Minonishi

A plurality of cutout members are cut out from a plate blank by a plasma arc generated from a plasma torch by a method including a piercing step and a cutting step. In the piercing step, an aperture is formed on an outer peripheral side of a cutout member by maintaining the plasma torch at a first height from the plate blank on the outer peripheral side of the cutout member while the plasma arc is generated from the plasma torch and by moving the plasma torch relative to the plate blank in a horizontal direction. In the cutting step, a continuous cutting groove is formed along an outer contour of the cutout member by setting the plasma torch at a second height lower than the first height and by moving the plasma torch in the horizontal direction along an incision part and a processing line continuing to the incision part.

Plasma cutting method and plasma cutting device

Electrode for a plasma torch

Growing community of inventors

Hiratsuka, Japan

Kazunori Tsunekawa