公开(公告)号：US20250001478A1

公开(公告)日：2025-01-02

申请号：US18707849

申请日：2022-11-15

Applicant: A.L.M.T. Corp.

Inventor： Akihito ONO ,  Kohichiroh KIMURA ,  Yuichiro SEKI

IPC: B21C3/02 ,  B21C1/16

Abstract: There is provided an irregularly-shaped diamond die for producing an irregularly-shaped wire, wherein a processing hole is provided, the processing hole having a reduction portion and a bearing portion in this order from an upstream side in a wire drawing direction, a corner portion having a curved shape and a non-corner portion located at a position different from a position of the corner portion are provided in a cross section of the bearing portion perpendicular to the wire drawing direction, and a surface roughness of the corner portion is greater than a surface roughness of the non-corner portion. The surface roughness Sa of the corner portion is equal to or less than 0.30 μm and the surface roughness Sa of the non-corner portion is equal to or less than 0.20 μm.