INSERT NUT HAVING RECTANGULAR LATTIC STRUCTURE AND MANUFACTURING METHOD THEREOF

摘要

A method of manufacturing the insert nut having the rectangular lattice structure, comprises preparing a forged article having a flange and a nut body formed with a serration, which are formed by a forging process; pressing the forged article with a thread rolling die in which a diagonal line inclined at an angle of 15° to 30° with respect to a vertical line to a length direction thereof is formed, and a circular arc is defined by the diagonal line, and a curved die protrusion is provided to have a curvature R so that the vertical line is tangentially contacted with the circular arc, and thus an angle between rectangular lattices is maintained to 50° to 40°; and performing a thread rolling process by pressing-in and rotating the forged article.

主权项

1. An insert nut having a rectangular lattice structure, in which a nut body formed with a flange and a serration is formed by a forging process and then the serration is transformed into a diagonal shape by a thread rolling process in order to form a rectangular lattice,
wherein side inclined surfaces of the rectangular lattice are formed by the serration, and an upper inclined surface of the rectangular lattice is inclined at an angle of 15° to 40° with respect to a vertical line to a length direction of the nut body, and a curved line having a curvature R is formed, and thus an angle between the rectangular lattices is 50° to 40°.