Laser working machine and method for maintaining laser working machine

Patent metadata

Field	Value
Publication number	US-12589449-B2
Application number	US-202217577332-A
Country	US
Kind code	B2
Filing date	Jan 17, 2022
Priority date	Jul 19, 2019
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

A laser working machine includes a first slot provided at another end portion of a first body. In the first slot, either one of a first shielding plate and a first light transmissive plate is selectively insertable in a sealed manner. The first shielding plate is configured to block a first optical path. The first light transmissive plate has a first optical path hole through which the first optical path and a second optical path are connectable. The laser working machine includes a second slot provided at a second body end portion of a second body. In the second slot, either one of a second shielding plate and a second light transmissive plate is selectively insertable in a sealed manner. The second shielding plate is configured to block the second optical path. The second light transmissive plate has a second optical path hole.

First claim

What is claimed is:

1 . A laser working machine comprising:
a torch through which laser light is radiated to a workpiece; a first body comprising:
one end portion on which the torch is mounted;
another end portion provided at a position opposite to the one end portion in a direction along a first optical path;
at least one mirror configured to reflect the laser light to guide the laser light to the torch along the first optical path; and
a first slot which is provided at the another end portion;
a second body comprising:
a second body end portion attachable and detachable to and from the another end portion of the first body;
a second optical path optically connected to the first optical path; and
a second slot which is provided at the second body end portion;
a first shielding plate insertable into the first slot in a sealed manner and configured to block and seal off a first passageway of the first body through which the first optical path passes; and a second shielding plate insertable into the second slot in a sealed manner and configured to block and seal off a second passageway of the second body through which the second optical path passes, wherein, when the first shielding plate is inserted into the first slot and the second shielding plate is inserted into the second slot, a space surrounded by the first shielding plate, the second shielding plate, the first body, and the second body is shielded.

2 . The laser working machine according to claim 1 , further comprising:
a first light transmissive plate insertable into the first slot in a sealed manner and having a first optical path hole through which the first optical path and the second optical path are connectable to each other; and a second light transmissive plate insertable into the second slot in a sealed manner and having a second optical path hole through which the first optical path and the second optical path are connectable to each other.

3 . The laser working machine according to claim 2 ,
wherein the another end portion of the first body has a first through hole defining the first optical path and extending in a first optical path extending direction, wherein the second body end portion has a second through hole defining the second optical path and extending in a second optical path extending direction, wherein the first slot is defined by:
a first base surface having an inner opening of the first through hole;
a second base surface that faces the first base surface in the first optical path extending direction and has a facing opening facing the inner opening of the first through hole in the first optical path extending direction; and
a first outer circumferential surface extending in the first optical path extending direction between the first base surface and the second base surface, and
wherein the second slot is defined by:
a third base surface having a first inner opening of the second through hole;
a fourth base surface that faces the third base surface in the second optical path extending direction and has a second inner opening of the second through hole facing the first inner opening of the second through hole in the second optical path extending direction; and
a second outer circumferential surface extending in the second optical path extending direction between the third base surface and the fourth base surface.

4 . The laser working machine according to claim 3 ,
wherein the first light transmissive plate comprises
a first attachment for mounting the first light transmissive plate on the another end portion of the first body,
a first light transmissive plate body connected to the first attachment and having the first optical path hole,
a first sealing member mounted on the first light transmissive plate body and surrounding an outer circumference of the first optical path hole as viewed from a first axial direction of a center axis of the first optical path hole to seal a gap between the first base surface and the first light transmissive plate body,
a second sealing member mounted on the first light transmissive plate body and surrounding the outer circumference of the first optical path hole as viewed from the first axial direction to seal a gap between the second base surface and the first light transmissive plate body, and
a first attachment sealing member mounted on the first attachment to seal a gap between a first slot opening and the first attachment, the first slot opening being an insertion hole through which the first shielding plate and the first light transmissive plate are inserted, and
wherein the second light transmissive plate comprises
a second attachment for mounting the second light transmissive plate on the second body end portion,
a second light transmissive plate body connected to the second attachment and having the second optical path hole,
a third sealing member mounted on the second light transmissive plate body and surrounding an outer circumference of the second optical path hole as viewed from a second axial direction of a center axis of the second optical path hole to seal a gap between the third base surface and the second light transmissive plate body,
a fourth sealing member mounted on the second light transmissive plate body and surrounding the outer circumference of the second optical path hole as viewed from the second axial direction to seal a gap between the fourth base surface and the second light transmissive plate body, and
a second attachment sealing member mounted on the second attachment to seal a gap between a second slot opening and the second attachment, the second slot opening being an insertion hole through which the second shielding plate and the second light transmissive plate are inserted.

5 . The laser working machine according to claim 4 ,
wherein the first shielding plate comprises
a third attachment for mounting the first shielding plate on the another end portion of the first body,
a first shielding plate body connected to the third attachment and comprising a first optical path shielding member that faces the inner opening of the first through hole in the first optical path extending direction to block the first optical path when the first shielding plate is inserted in the first slot,
a fifth sealing member mounted on the first shielding plate body and surrounding the first optical path shielding member as viewed from a first thickness direction of the first shielding plate body to seal a gap between the first base surface and the first shielding plate body, and
a sixth sealing member mounted on the first shielding plate body and surrounding the first optical path shielding member as viewed from the first thickness direction to seal a gap between the second base surface and the first shielding plate body, and
wherein the second shielding plate comprises
a fourth attachment for mounting the second shielding plate on the second body end portion,
a second shielding plate body connected to the fourth attachment and comprising a second optical path shielding member that faces the first inner opening of the second through hole in the second optical path extending direction to block the second optical path when the second shielding plate is inserted in the second slot,
a seventh sealing member mounted on the second shielding plate body and surrounding the second optical path shielding member as viewed from a second thickness direction of the second shielding plate body to seal a gap between the third base surface and the second shielding plate body, and
an eighth sealing member mounted on the second shielding plate body and surrounding the second optical path shielding member as viewed from the second thickness direction to seal a gap between the fourth base surface and the second shielding plate body.

Assignees

• Yamazaki Mazak Corp

Inventors

• Nakayama Tomohisa
• Sasaki Satoshi
• Kitamoto Tetsuichi

Classifications

• B23K26/128

  Laser beam path enclosures · CPC title

• B23K26/064

  by means of optical elements, e.g. lenses, mirrors or prisms · CPC title

• B23K7/10

  Auxiliary devices, e.g. for guiding or supporting the torch · CPC title

• G02B17/06

  using mirrors only {, i.e. having only one curved mirror (used in non-imaging applications G02B19/00)} · CPC title

• B23K26/702 Primary

  Auxiliary equipment · CPC title