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Patent Searching and Data


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
Attorney, Agent or Firm:
Patent business corporation Takakazu patent firm