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Title:
MANUFACTURING METHOD AND MANUFACTURING APPARATUS FOR RING-LIKE MEMBER
Document Type and Number:
Japanese Patent JP2016043381
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To realize a structure which prevents damage from occurring in a mandrel and improves the precision of a shape of a post-processing ring-like member.SOLUTION: A mandrel 23a is configured of a pair of support shanks 37a, 37b provided concentrically with each other in a state of axial separation and a form rolling shank 38 provided concentrically between both the support shanks 37a, 37b in the axial direction. One support shank 37a is provided in a state that an axial displacement to the rolling shank 38 is restricted. When a pressing force is applied from a metallic material 26 in the direction of separating from the rolling shank 38, the other support shank 37b is provided in a state of being displaceable in the direction.SELECTED DRAWING: Figure 1

Inventors:
KOBAYASHI KAZUTO
YASUDA YUTAKA
Application Number:
JP2014169183A
Publication Date:
April 04, 2016
Filing Date:
August 22, 2014
Export Citation:
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Assignee:
NSK LTD
International Classes:
B21H1/12
Domestic Patent References:
JPS4016898B1
JPH01180743A1989-07-18
JPH08243676A1996-09-24
JP2000334537A2000-12-05
JP2000343173A2000-12-12
JP2004074281A2004-03-11
JP2005262296A2005-09-29
JPS4425225B1
JPS5334667A1978-03-31
JPH01180743A1989-07-18
JPH08243676A1996-09-24
JP2000334537A2000-12-05
JP2000343173A2000-12-12
JP2004074281A2004-03-11
JP2005262296A2005-09-29
JPS5334667A1978-03-31
Attorney, Agent or Firm:
Patent business corporation Takakazu patent firm