Title:
車輪支持用転がり軸受ユニットの製造方法及び製造装置
Document Type and Number:
Japanese Patent JP4127266
Kind Code:
B2
Abstract:
In a manufacturing method and a manufacturing apparatus for a wheel-support rolling bearing unit, when forming a crimped portion 14 on an end (inside end) of a hub main body 8 a, by rocking die forging using a die 26 , while preventing enlargement of equipment, in order to prevent forming indentations in a second outer raceway 6 a and a second inner raceway 12 a, in the present invention, the outer ring 1 a is turned by a motor 48 , and the balls 32 are rotated. A difference is provided between the rotation speed of the balls 32 and an oscillation speed of the die 26 . This difference is preferably at least 10 min-1. By rotating the balls 32 the formation of indentations in the second outer raceway 6 a and the second inner raceway 12 a is prevented. Moreover, by providing the difference between the rotation speed and the oscillation speed of the die 26 , an increase in the torque required for rotation the outer ring 1 a is suppressed.
Inventors:
Yasumura Masahiro
Nobuyuki Hagiwara
Akifumi Horie
Nobuyuki Hagiwara
Akifumi Horie
Application Number:
JP2004515524A
Publication Date:
July 30, 2008
Filing Date:
June 19, 2003
Export Citation:
Assignee:
Nippon Seiko Co., Ltd.
International Classes:
F16C35/063; B21D39/00; B21J9/02; B21K23/04; B21K25/00; B23P11/00; B60B27/00; B60B35/18; F16C19/00; F16C19/18; F16C19/38; F16C33/64; F16C43/04
Domestic Patent References:
| JP2003021153A | ||||
| JP2002021864A | ||||
| JP2001221241A | ||||
| JP2001130210A | ||||
| JP2000343905A |
Attorney, Agent or Firm:
Takeo Koyama
Kinzo Koyama
Kameda Tetsuaki
Kinzo Koyama
Kameda Tetsuaki