Title:
転造ダイスおよびこれを用いたボール状部付き軸部品の製造方法
Document Type and Number:
Japanese Patent JP4310295
Kind Code:
B2
Abstract:
A rolling die (1) is provided for forming a rod member with a ball portion. The rolling die includes a first die member (1a) and a second die member (1b) facing the first die member (1a). Each of the first die member and the second die member (1a,1b) has a process surface (2a,2b). The process surface (2a,2b) has a start forming portion (51) having a process tooth (5) configured to bite the rod member and an arc surface portion (8) proximate the process tooth (5), an intermediate forming portion (52) having the process tooth (5) and a curved surface (9) proximate the process tooth (5), the curved surface (9) being configured to press the rod member to form an arched shape, and a finish forming portion (53) having the process tooth (5) and a hemispheric groove (11) configured to press the rod member into the arched shape to form the ball portion. The invention also relates to a method of making a rod member with a ball portion.
Inventors:
Naoshige Taniguchi
Yoshio Nonaka
Norishige Hayashi
Kazuhiko Masuo
Yoshio Nonaka
Norishige Hayashi
Kazuhiko Masuo
Application Number:
JP2005215275A
Publication Date:
August 05, 2009
Filing Date:
July 26, 2005
Export Citation:
Assignee:
Sanmei Manufacturing Co., Ltd.
International Classes:
B21H1/00; B21H1/14
Foreign References:
| WO2005051594A1 | ||||
| WO1999047288A1 |
Attorney, Agent or Firm:
Suzuki Manabu
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