Title:
有頭部品の製造方法
Document Type and Number:
Japanese Patent JP7261060
Kind Code:
B2
Abstract:
To provide a method of manufacturing a headed part that is less likely to create burr on a seat surface, which is likely to occur in rolling of a relief groove in a shaft part.SOLUTION: A method of manufacturing a headed part according to the present invention includes a pressing step of integrally molding a large-diameter shaft part 1 of a large diameter and a small-diameter shaft part 2 of a substantially same diameter as a wire rod 5 by pressing the wire rod 5 of a prescribed diameter in an axial direction, and a rolling step of molding an annular relief groove 3 in the small-diameter shaft part 2. The rolling step is a process of flowing an excess thickness 2a of the small-diameter shaft part 2 that was created in the molding step of the relief groove 3 toward the large-diameter shaft part 1. This enables the excess thickness 2a created in the rolling step to be taken into the large-diameter shaft part 2, thus providing an advantage of causing no waste such as disposal of a material.SELECTED DRAWING: Figure 4
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Inventors:
Yokota Masanori
Takashi Onishi
Hotta Shinji
Takashi Onishi
Hotta Shinji
Application Number:
JP2019067809A
Publication Date:
April 19, 2023
Filing Date:
March 29, 2019
Export Citation:
Assignee:
Nitto Seiko Co., Ltd.
International Classes:
B21H1/00; B21H3/06; B21J5/08; B21K1/46
Domestic Patent References:
| JP8267165A | ||||
| JP11010269A |