公开(公告)号：US20210379676A1

公开(公告)日：2021-12-09

申请号：US17290668

申请日：2019-10-29

Applicant: HOWA MACHINERY, LTD.

Inventor： Hiroshi NAGAOSA ,  Shin YOSHIDA

IPC: B23B31/16 ,  B23B31/39

Abstract: A chuck-claw coupling mechanism includes a coupling member provided in a master jaw, a first resilient member, and an operation unit. The coupling member is movable between a coupling position at which the coupling member is coupled to the claw, and a separation position at which the coupling member is separated from the claw. The first resilient member urges the coupling member toward the coupling position. The operation unit moves the coupling member to the separation position.

公开(公告)号：US20210308817A1

公开(公告)日：2021-10-07

申请号：US17266332

申请日：2019-08-09

Applicant: HOWA MACHINERY, LTD.

Inventor： Hiroshi NAGAOSA

IPC: B23Q17/22 ,  G01L5/16 ,  G01L5/00 ,  B23B31/02 ,  B23Q3/06

Abstract: A chuck grip accuracy checking method includes a gripping in which the measurement target is gripped on the claws, a moving step, and a measuring step. In the moving step, a movable member provided with a measurement instrument capable of measuring a run-out of the measurement target is moved by driving a movable-member driver to a position at which the measurement instrument can measure a run-out of the measurement target. In the measuring step, a run-out of the measurement target is measured by the measurement instrument, while the chuck is being rotated by driving a rotation driver.

公开(公告)号：US20210008644A1

公开(公告)日：2021-01-14

申请号：US16982756

申请日：2019-03-15

Applicant: HOWA MACHINERY, LTD.

Inventor： Hiroshi NAGAOSA ,  Kazuya KAWAWAKI

IPC: B23B31/39

Abstract: A hand for exchanging claws of a chuck is configured to be fitted to a transfer device so as to attach and detach a claw to and from a fitting groove provided in the chuck of a machine tool. The hand for exchanging claws includes: a hand part capable of grasping the claw; and a compliance device that fits the hand part to the transfer device, and allows relative displacement between the transfer device and the hand part.

公开(公告)号：US20220184712A1

公开(公告)日：2022-06-16

申请号：US17598415

申请日：2020-03-25

Applicant: HOWA MACHINERY, LTD.

Inventor： Hiroshi NAGAOSA

IPC: B23B31/00

Abstract: A dust-proof mechanism for chuck includes a fluid supply source, an inner space inside a chuck, and a discharge space in the chuck. A supply fluid is supplied to the inner space from the fluid supply source, and passes through the inner space as a pressurized fluid. Through the discharge space, the pressurized fluid is discharged to the outside of the chuck from the inner space.

公开(公告)号：US20210379674A1

公开(公告)日：2021-12-09

申请号：US17290622

申请日：2019-10-29

Applicant: HOWA MACHINERY, LTD.

Inventor： Hiroshi NAGAOSA

IPC: B23B31/16 ,  B23B31/39

Abstract: A chuck-claw guide structure includes a guide-space delimiting part that delimits a guide space in communication with an attachment groove, and a regulation part provided on the guide-space delimiting part. The guide-space delimiting part has a contact surface configured to regulate the claw in contact therewith at a position along the attachment groove in a first direction. The regulation part is configured to regulate the claw at a position along the attachment groove in a second direction different from the first direction.

公开(公告)号：US20210299759A1

公开(公告)日：2021-09-30

申请号：US17050968

申请日：2019-04-18

Applicant: HOWA MACHINERY, LTD.

Inventor： Hiroshi NAGAOSA

IPC: B23B31/00 ,  B23B31/18 ,  F16J15/00 ,  F16J15/3232

Abstract: A sealing part disposed between a claw opening-and-closing member and a support member. The sealing part includes a first contact part that is in contact with the claw opening-and-closing member, and a second contact part that is in contact with the claw opening-and-closing member at a position different from that of the first contact part.