# US 2019/0168339 A1 · Laser processing machine and nozzle thereof

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- Number: US 2019/0168339 A1
- Document ID: US20190168339A1
- Status: Published application
- Kind: A1
- Application number: 15/832,952
- Filed: 2017-12-06
- Published: 2019-06-06
- Earliest claimed: 2017-12-06
- Inventors: SUNG-LING FANG
- Web page: https://patentgrep.com/patent/US20190168339A1

## CPC

- B23K 26/1488: {Means for protecting nozzles, e.g. the tip surface (by breakaway lines B23K26/1482)}
- B23K 26/21: by welding
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM

## Abstract

A laser processing machine and a nozzle thereof are provided. The nozzle includes a nozzle body and a protector. The nozzle body defines a laser passage therein. The protector is coupled to an end portion of the nozzle body. The protector has a through hole communicating with the laser passage. The protector is made of a conductive material not containing a metallic element.

## Claims

### Claim 1

A nozzle for a laser processing machine, comprising:
a nozzle body, the nozzle body defining a laser passage therein; and
a protector, coupled to an end portion of the nozzle body, the protector having a through hole communicating with the laser passage, the protector being made of a conductive material not containing a metallic element.

### Claim 2 (depends on 1)

The nozzle as claimed in claim 1, wherein the material of the protector is graphite.

### Claim 3 (depends on 1)

The nozzle as claimed in claim 1, wherein the protector is coupled to the end portion in an embedded manner.

### Claim 4 (depends on 3)

The nozzle as claimed in claim 3, wherein the end portion defines an accommodation trough and an opening edge surrounding the accommodation trough, the accommodation trough is configured to receive the protector, and the opening edge is provided with a chamfer.

### Claim 5 (depends on 3)

The nozzle as claimed in claim 3, wherein the end portion defines an accommodation trough and an opening edge surrounding the accommodation trough, the protector includes an insertion portion and a head portion, the head portion has a diameter greater than that of the insertion portion, the insertion portion is embedded into the accommodation trough, the head portion is against the opening edge, the head portion covers the opening edge, and the through hole passes through the insertion portion and the head portion.

### Claim 6

A laser processing machine, comprising:
a laser processing machine body, the laser processing machine body including a laser generating module and a focusing module, the focusing module corresponding to the laser generating module for focusing a laser generated by the laser generating module; and
a nozzle mounted to the laser processing machine body, the nozzle comprising a nozzle body and a protector, the nozzle body defining a laser passage therein, the protector being coupled to an end portion of the nozzle body, the protector having a through hole communicating with the laser passage for the laser to pass therethrough, the protector being made of a conductive material not containing a metallic element.

### Claim 7 (depends on 6)

The laser processing machine as claimed in claim 6, wherein the material of the protector is graphite.

### Claim 8 (depends on 6)

The laser processing machine as claimed in claim 6, wherein the protector is coupled to the end portion in an embedded manner.

### Claim 9 (depends on 8)

The laser processing machine as claimed in claim 8, wherein the end portion defines an accommodation trough and an opening edge surrounding the accommodation trough, the accommodation trough is configured to receive the protector, and the opening edge is provided with a chamfer.

### Claim 10 (depends on 8)

The laser processing machine as claimed in claim 8, wherein the end portion defines an accommodation trough and an opening edge surrounding the accommodation trough, the protector includes an insertion portion and a head portion, the head portion has a diameter greater than that of the insertion portion, the insertion portion is embedded into the accommodation trough, the head portion is against the opening edge, the head portion covers the opening edge, and the through hole passes through the insertion portion and the head portion.