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Patent Searching and Data


Title:
FORGING MOLD DEVICE AND FORGING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/039272
Kind Code:
A1
Abstract:
In the present invention, an inner side joint member (143) of a constant speed universal joint (141) that has a track groove (147) which inclines with respect to a joint axis (n-n) is manufactured. The present invention comprises: a material inserting step (61) for inserting a material (W1) on the inner side of a die row (26); a closing step (62) for bringing upper and lower punches (23, 24) relatively close to one another; a molding step (63) for compressing the material by bringing the upper and lower punches even closer to one another; an opening step (64) for relatively separating the upper and lower punches; and a discharging step (65) for discharging the molded article obtained by the molding. In the material inserting step, the closing step, and the molding step, a closed state is set in which each die (25) of the die row is moved radially inward to cause the material to be set in a stable position, and in the opening step and the discharging step, an open state is set in which each die of the die row is moved radially outward.

Inventors:
YAMAGUCHI MASAMI (JP)
NUMAMOTO JUN (JP)
OBATA TOMOFUMI (JP)
Application Number:
PCT/JP2018/029688
Publication Date:
February 28, 2019
Filing Date:
August 07, 2018
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
B21J13/02; B21D37/02; B21K1/14; F16D3/20
Foreign References:
JPH11114652A1999-04-27
JPS5756132A1982-04-03
JP2000140984A2000-05-23
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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