Title:
MOLDING METHOD AND MOLDING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/039503
Kind Code:
A1
Abstract:
Provided are a molding method and a molding apparatus with which it is possible to maintain strength after molding while suppressing deformations. This molding method includes a burring step and a pressing step. In the burring step, a branching pipe (20) is formed by causing a circumferential wall (11) of a cylindrical member (workpiece (10)) having a cylindrical circumferential wall (11) to project outward in a tube shape. In the pressing step, a distal-end surface (21A) of the branching pipe (20) is pressed toward a base-end part (22) of the branching pipe (20). In the pressing step, the distal-end surface (21A) of the branching pipe (20) can be pressed by an end-surface pressing punch (51) in a state in which a burring punch (41) is inserted into the branching pipe (20).
Inventors:
HAYASE TOMOMI (JP)
KANEKO RYUICHI (JP)
KANEKO RYUICHI (JP)
Application Number:
PCT/JP2018/030953
Publication Date:
February 28, 2019
Filing Date:
August 22, 2018
Export Citation:
Assignee:
KYB CORP (JP)
International Classes:
B21D19/08; B21C37/29; B21D37/08
Foreign References:
| GB759146A | 1956-10-17 | |||
| FR1100159A | 1955-09-16 | |||
| JPH06344039A | 1994-12-20 | |||
| JP2003285121A | 2003-10-07 | |||
| JP2014057997A | 2014-04-03 |
Attorney, Agent or Firm:
GRANDOM PATENT LAW FIRM (JP)
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