公开(公告)号：US20210039151A1

公开(公告)日：2021-02-11

申请号：US17077787

申请日：2020-10-22

Applicant: SUMITOMO HEAVY INDUSTRIES, LTD. ,  JAPAN AEROFORGE, LTD.

Inventor： Kei Yamauchi ,  Shinya Ishigai

IPC: B21D11/14 ,  B21J1/02

Abstract: A compressive torsion forming device for processing a processing material using a first die and a second die facing each other includes a sliding portion that includes a first hydraulic chamber, and slides in accordance with a change in internal pressure of the first hydraulic chamber so as to move the first die in a direction of an axis; a rotating table provided with the second die and rotatable about the axis; a table support portion provided opposite to the second die with the rotating table interposed therebetween in the direction of the axis; and a rotational bearing that rotatably supports the rotating table with respect to the table support portion, and receives a force acting on the rotating table in a direction from the second die toward the rotating table.

公开(公告)号：US11826808B2

公开(公告)日：2023-11-28

申请号：US17077787

申请日：2020-10-22

Applicant: SUMITOMO HEAVY INDUSTRIES, LTD. ,  JAPAN AEROFORGE, LTD.

Inventor： Kei Yamauchi ,  Shinya Ishigai

IPC: B21D11/14 ,  B21J1/02

CPC classification number: B21D11/14 ,  B21J1/02

Abstract: A compressive torsion forming device for processing a processing material using a first die and a second die facing each other includes a sliding portion that includes a first hydraulic chamber, and slides in accordance with a change in internal pressure of the first hydraulic chamber so as to move the first die in a direction of an axis; a rotating table provided with the second die and rotatable about the axis; a table support portion provided opposite to the second die with the rotating table interposed therebetween in the direction of the axis; and a rotational bearing that rotatably supports the rotating table with respect to the table support portion, and receives a force acting on the rotating table in a direction from the second die toward the rotating table.

公开(公告)号：US20170312810A1

公开(公告)日：2017-11-02

申请号：US15524101

申请日：2015-10-29

Applicant: JAPAN AEROFORGE, LTD.

Inventor： Hiroaki KUWANO ,  Shinya ISHIGAI

IPC: B21J9/12 ,  B30B1/34 ,  B30B15/16 ,  B30B15/22

Abstract: A hydraulic forging press machine and a control method, whereby surging of the forging load or dead zones where the forging speed goes to zero is suppressed, and forging is performed with high precision throughout a wider range than the prior art, from low to high load. Pressure cylinders have a main pressure cylinder configured so working fluid is supplied during forging, and secondary pressure cylinders are configured so supplying and stopping of the supply of working fluid thereto are switched in response to the forging load, head-side hydraulic chambers of the secondary pressure cylinders being connected to a head-side hydraulic chamber of the main pressure cylinder via electromagnetic switching valves. Only the main pressure cylinder is used until the forging load exceeds a set load, and the number of secondary pressure cylinders used is sequentially increased as the forging load increases after the forging load exceeds the set load.

公开(公告)号：US10786847B2

公开(公告)日：2020-09-29

申请号：US15524101

申请日：2015-10-29

Applicant: JAPAN AEROFORGE, LTD.

Inventor： Hiroaki Kuwano ,  Shinya Ishigai

IPC: B21J9/12 ,  B30B1/34 ,  B30B15/22 ,  B30B15/16

Abstract: A hydraulic forging press machine and a control method, whereby surging of the forging load or dead zones where the forging speed goes to zero is suppressed, and forging is performed with high precision throughout a wider range than the prior art, from low to high load. Pressure cylinders have a main pressure cylinder configured so working fluid is supplied during forging, and secondary pressure cylinders are configured so supplying and stopping of the supply of working fluid thereto are switched in response to the forging load, head-side hydraulic chambers of the secondary pressure cylinders being connected to a head-side hydraulic chamber of the main pressure cylinder via electromagnetic switching valves. Only the main pressure cylinder is used until the forging load exceeds a set load, and the number of secondary pressure cylinders used is sequentially increased as the forging load increases after the forging load exceeds the set load.