Title:
疲労強度に優れた長寿命回転体の製造方法
Document Type and Number:
Japanese Patent JP4261879
Kind Code:
B2
Abstract:
A long life rotating body with an excellent fatigue strength and a method of manufacturing the rotating body, the rotating body formed by welding the end parts of stacked two sheets of sheet metal to each other comprising lap fillet welded joints, cold bending worked parts, and punched holes, characterized in that an ultrasonic shock treatment is applied to either of the welded joints, cold bending worked parts, and punched holes to form dents or smoothen the surfaces thereof so as to relieve a residual tensile stress, whereby the long life rotating body with the excellent fatigue strength formed of the sheet metal having the lap fillet welded joints, cold bending worked parts, and punched holes which is subjected to repeated loads by rotation such as road wheels for car, pulleys, gears, and crawler driving wheels can be provided.
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Inventors:
Tomonori Tominaga
Takagi
Takagi
Application Number:
JP2002333194A
Publication Date:
April 30, 2009
Filing Date:
November 18, 2002
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C21D7/06; B23K31/00; B23K31/02; B60B3/04; C21D7/04
Domestic Patent References:
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| JP2001180202A | ||||
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Foreign References:
| US20020014100 | ||||
| US6171415 |
Attorney, Agent or Firm:
Etsuichi Matsumoto
Shiina Akira
Shiina Akira