Title:
SCREW COMPONENT AND MANUFACTURING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2020020375
Kind Code:
A
Abstract:
To provide a screw component capable of suppressing fracture of a neck part upon being fastened.SOLUTION: A screw component comprises: a shaft part having a screw part formed on an outer peripheral surface, and a neck part adjacent to the rear end of the screw part and having an outer diameter smaller than an effective diameter of the screw part; and an expansion part expanding radially outward so as to be adjacent to the rear end of the neck part. When the screw part is viewed from a section including an axial line, a fiber flow continues, at least, from the intersection between a virtual line passing through the effective diameter of the screw part and the external surface of the expansion part to the tip of the external surface of the neck part, along the external surfaces of the expansion part and neck part.SELECTED DRAWING: Figure 2
Inventors:
MUNEMURA KENGO
Application Number:
JP2018143230A
Publication Date:
February 06, 2020
Filing Date:
July 31, 2018
Export Citation:
Assignee:
NGK SPARK PLUG CO
International Classes:
F16B35/00; B21H3/06; H01T13/02; H01T21/02
Attorney, Agent or Firm:
Patent Service Corporation Shinmei Century