公开(公告)号：US20200290114A1

公开(公告)日：2020-09-17

申请号：US16753069

申请日：2018-10-31

Applicant: NETUREN CO., LTD.

Inventor： Mitsuhiro OKAMOTO ,  Fumiaki IKUTA ,  Yoshitaka KUWAHARA ,  Kazuki MORI ,  Takashi IKEDA

IPC: B21K1/12

Abstract: A method for setting conditions for a shaft diameter enlargement, a shaft diameter enlargement method, and a shaft diameter enlargement apparatus are provided. A controller of the shaft diameter enlargement apparatus controls a compressing section, a bending section, and a rotating section to enlarge an intermediate portion of a shaft workpiece to have a predetermined outer diameter by rotating the shaft workpiece about its axis with axial compressive force a bending angle being applied to the intermediate portion. The controller determines whether the shaft workpiece is acceptable, based on the number of rotations of die shaft workpiece required for enlarging the intermediate portion to have the predetermined outer diameter or based on an enlargement ratio of the intermediate portion.

公开(公告)号：US20160346828A1

公开(公告)日：2016-12-01

申请号：US15117293

申请日：2015-03-17

Applicant: NETUREN CO., LTD.

Inventor： Yoshitaka KUWAHARA ,  Kazuki MORI ,  Mitsuhiro OKAMOTO ,  Takashi IKEDA ,  Fumiaki IKUTA

IPC: B21J5/08 ,  B21J13/00

CPC classification number: B21J5/08 ,  B21J13/00 ,  B21K1/12

Abstract: A shaft holding sleeve is inserted in a fitting hole of a compressing machine of a shaft diameter enlarging apparatus that applies an axial compression stress to a shaft stock to hold an end portion of the shaft stock during a shaft diameter enlarging process for radially enlarging a portion of the shaft stock. The shaft holding sleeve includes a front end surface to be inserted in the fitting hole, an exposed portion to be exposed to an outside of the fitting hole, and at least one air communication passage extending from the front end surface to a surface of the exposed portion. A jig may be attached to the shaft diameter enlarging apparatus to facilitate the insertion of the shaft holding sleeve into the fitting hole.

Abstract translation: 轴保持套筒插入轴直径扩大装置的压缩机的装配孔中，该轴直径扩大装置在轴直径扩大过程中向轴坯施加轴向压缩应力以保持轴坯的端部，以径向扩大部分 的轴库存。 轴保持套筒包括插入到装配孔中的前端面，暴露于装配孔外部的暴露部分，以及至少一个空气连通通道，从前端表面延伸到露出的外表面 一部分。 夹具可以附接到轴直径扩大装置，以便于将轴保持套筒插入到装配孔中。