Title:
MANUFACTURING METHOD OF ROLLING BOLT
Document Type and Number:
Japanese Patent JP2018167273
Kind Code:
A
Abstract:
To enlarge a friction coefficient at a bolt tightening time, by a manufacturing method of a rolling bolt.SOLUTION: In a manufacturing method of a rolling bolt, a line steel stock is formed into a prescribed screwless bolt-shaped material (S12), a screw part is formed by a rolling method on the screwless bolt-shaped material (S18), and after forming the screw part, a shot blast treatment is performed onto the whole area of the surface of the rolling bolt (S22). Thereafter, a surface treatment (S24) and application of a friction coefficient stabilization material (26) are performed. Further, a rolling bolt into which a built-in type washer is integrated may be formed.SELECTED DRAWING: Figure 2
Inventors:
TAKEUCHI TAKETO
Application Number:
JP2017064490A
Publication Date:
November 01, 2018
Filing Date:
March 29, 2017
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
B21H3/04; B21K1/46; B24C1/06; F16B33/06
Domestic Patent References:
| JPS616209A | 1986-01-11 | |||
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| JP2016118028A | 2016-06-30 | |||
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| JPS5761215U | 1982-04-12 | |||
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| JPH08219131A | 1996-08-27 | |||
| JPH02218520A | 1990-08-31 | |||
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Foreign References:
| US3818525A | 1974-06-25 |
Attorney, Agent or Firm:
Patent Corporation yki International Patent Office