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：US20180056371A1

公开(公告)日：2018-03-01

申请号：US15563029

申请日：2016-05-13

Applicant: NETUREN CO., LTD.

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

IPC: B21J5/08 ,  B21K1/24 ,  B21K23/04

CPC classification number: B21J5/08 ,  B21K1/24 ,  B21K1/46 ,  B21K23/04 ,  B23D55/04

Abstract: A method and an apparatus for manufacturing a stepped member are provided. An intermediate portion of a shaft workpiece is radially enlarged while being compressed in an axial direction by applying alternating load to the intermediate portion in a direction intersecting the axial direction in a state in which pressure that compresses the shaft workpiece in the axial direction is applied to both ends of the shaft workpiece. The enlarged intermediate portion of the shaft workpiece is cat in a direction perpendicular to the axial direction so that the shaft workpiece is divided into two stepped members. Each of the stepped members has a shaft portion and a head portion provided at an axial end of the shaft portion, and the head portion has a larger diameter than the shaft 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。

公开(公告)号：US20180304343A1

公开(公告)日：2018-10-25

申请号：US15769869

申请日：2016-10-20

Applicant: NETUREN CO., LTD.

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

IPC: B21J5/08 ,  B21K1/12 ,  B21K23/04 ,  B21K25/00

CPC classification number: B21J5/08 ,  B21K1/12 ,  B21K23/04 ,  B21K25/00

Abstract: A composite member includes a metal shaft member, and a fit member having an insertion hole and secured onto the shaft member inserted in the insertion hole. The shaft member includes a receiving portion contacting a first end surface of the fit member, a first radially enlarged portion adjacent to the receiving portion in an axial direction and tightly contacting an inner peripheral surface of the insertion hole, and a second radially enlarged portion adjacent to the first radially enlarged portion in the axial direction and tightly contacting a second end surface of the fit member opposite to the first end surface. The first and second radially enlarged portions are formed by applying a compressive load in the axial direction to the shaft member and an alternating load in a direction intersecting the axial direction to a portion of the shaft member inserted in the insertion hole.