Title:
【発明の名称】ホイ-ルのボルト穴のナツト座加工方法
Document Type and Number:
Japanese Patent JP2557879
Kind Code:
B2
Abstract:
A method for processing a nut seat formed around a bolthole on a wheel including the steps of drilling the nut seat and the bolthole substantially simultaneously with a step drill and performing roller burnishing on at least edge portions of the nut seat wherein the roller is rolled on the nut seat in the circumferential direction of the nut while the roller is pressed onto the nut seat. By roller burnishing, at least the edge portions of the nut seat are finished to a specular grade. The strength of the nut seat itself can be increased by the roller burnishing, thereby decreasing the required thickness of a light alloy wheel and the total weight of the wheel. In addition, the manhours for processing the wheel can be reduced.
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Inventors:
OKUMURA TSUNEMASA
KOBAYASHI SHUNJI
KOBAYASHI SHUNJI
Application Number:
JP9999387A
Publication Date:
November 27, 1996
Filing Date:
April 24, 1987
Export Citation:
Assignee:
TOPY IND
International Classes:
B21H1/02; B24B39/00; B24B39/02; B24B39/04; B60B3/16; C21D7/08; (IPC1-7): B24B39/00; B60B3/16
Domestic Patent References:
| JP60118462A | ||||
| JP58167037A |
Attorney, Agent or Firm:
Nobuo Tabuchi (1 outside)