CN107096995B - method for focusing cutting head of laser cutting machine - Google Patents

Abstract

the invention discloses a method for focusing a cutting head of a laser cutting machine, which comprises the following specific steps: 1) the cutting head setting type selection and focusing management type selection, and the focusing management selects an adjustable reflector; 2) the calibration of the proportion of the big valve and the small valve, wherein the small valve is calibrated in a mode of measuring voltage through zooming; 3) adjusting the gap between the reflector and the mounting seat, and fixing the gap between the reflector and the mounting seat at 1mm by adjusting an M5 disc reed screw and an M4 jackscrew; 4) confirm the optical center, pull focus.

Description

Method for focusing cutting head of laser cutting machine

Technical Field

The invention relates to the technical field of laser cutting machines, in particular to a method for focusing a cutting head of a laser cutting machine.

background

the laser cutting is to focus the laser emitted from the laser into a laser beam with high power density through an optical path system, the laser beam irradiates the surface of a workpiece to enable the workpiece to reach a melting point or a boiling point, simultaneously, high-pressure gas coaxial with the laser beam blows away melted or gasified metal, and the material is finally formed into a cut joint along with the movement of the relative position of the laser beam and the workpiece, so that the purpose of cutting is achieved.

laser cutting machine is at the in-process that uses, need focus its cutting head in order to reach better cutting effect, and current laser cutting machine cutting head focusing mode is comparatively loaded down with trivial details, inconvenient user's use, has consequently brought very big inconvenience for user's use.

Disclosure of Invention

the invention aims to provide a method for focusing a cutting head of a laser cutting machine, which has the advantage of facilitating focusing by a user and solves the problem that the conventional cutting head of the laser cutting machine is inconvenient for the user to focus.

in order to achieve the purpose, the invention provides the following technical scheme: a method for focusing a cutting head of a laser cutting machine comprises the following specific operation steps:

1) the cutting head setting type selection and focusing management type selection, and the focusing management selects an adjustable reflector;

2) the calibration of the proportion of the big valve and the small valve, wherein the small valve is calibrated in a mode of measuring voltage through zooming;

3) Adjusting the gap between the reflector and the mounting seat, and fixing the gap between the reflector and the mounting seat at 1mm by adjusting an M5 disc reed screw and an M4 jackscrew;

4) Confirming the optical center and pulling the focus point, wherein the step 4) specifically comprises the following steps:

4.1) optical center adjustment: adjusting the M4 jackscrew of the reflector without adjusting the focusing lens;

when the optical center is on the upper side, adjusting an upper M4 jackscrew, and locking in the clockwise direction; when the device is downward, the M4 jackscrew is loosened in the counterclockwise direction;

when the optical center is deviated to the left, the right M4 jackscrew is locked clockwise; when the optical center is deviated to the right, the M4 jackscrew is loosened in the counterclockwise direction;

4.2) the selection of the nozzle is from big to small, after confirming that the optical center is centered, starting to pull a focus, measuring a focus line by using a roundness detector, selecting parameters of the focus, wherein the speed is 12000 mm/min, and the power is as follows: 1000W, height: 1/0.5mm, focus: 4/0/-8/-10 mm;

4.3) measuring black card: placing the black card on a measuring instrument, firstly drawing a reference measuring line segment, drawing an arc line 1 and an arc line 2, drawing the arc line to be as long as possible and positioned at the finest segment of the light beam, and calculating the shortest distance line segment between the arc line 1 and the arc line 2 to obtain a distance 1 line segment; and then calculating the distance = distance 2 from the reference measurement line segment to the distance 1 line segment, respectively calculating corresponding actual focal values according to a formula Y =11.5- (X + 1), wherein X is the distance 2, Y is the actual focal value, and writing in setting, wherein the setting needs to fill the actual calculated values into the focal values, and the accuracy is 1 digit after the decimal point.

drawings

FIG. 1 is a schematic view of the structure of the present invention 1;

fig. 2 is a schematic structural diagram 2 of the present invention.

Detailed Description

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A method for focusing a cutting head of a laser cutting machine comprises the following specific operation steps:

1) the cutting head setting type selection and focusing management type selection, and the focusing management selects an adjustable reflector;

2) The calibration of the proportion of the big valve and the small valve, wherein the small valve is calibrated in a mode of measuring voltage through zooming;

3) Adjusting the gap between the reflector and the mounting seat, and fixing the gap between the reflector and the mounting seat at 1mm by adjusting an M5 disc reed screw and an M4 jackscrew;

4) Confirming the optical center and pulling the focus point, wherein the step 4) specifically comprises the following steps:

4.1) optical center adjustment: adjusting the M4 jackscrew of the reflector without adjusting the focusing lens;

When the optical center is on the upper side, adjusting an upper M4 jackscrew, and locking in the clockwise direction; when the device is downward, the M4 jackscrew is loosened in the counterclockwise direction;

when the optical center is deviated to the left, the right M4 jackscrew is locked clockwise; when the optical center is deviated to the right, the M4 jackscrew is loosened in the counterclockwise direction;

4.2) the selection of the nozzle is from big to small, after confirming that the optical center is centered, starting to pull a focus, measuring a focus line by using a roundness detector, selecting parameters of the focus, wherein the speed is 12000 mm/min, and the power is as follows: 1000W, height: 1/0.5mm, focus: 4/0/-8/-10 mm;

4.3) measuring black card: placing the black card on a measuring instrument, firstly drawing a reference measuring line segment, drawing an arc line 1 and an arc line 2, drawing the arc line to be as long as possible and positioned at the finest segment of the light beam, and calculating the shortest distance line segment between the arc line 1 and the arc line 2 to obtain a distance 1 line segment; and then calculating the distance = distance 2 from the reference measurement line segment to the distance 1 line segment, respectively calculating corresponding actual focal values according to a formula Y =11.5- (X + 1), wherein X is the distance 2, Y is the actual focal value, and writing in setting, wherein the setting needs to fill the actual calculated values into the focal values, and the accuracy is 1 digit after the decimal point.

although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (1)

1. a method for focusing a cutting head of a laser cutting machine comprises the following specific operation steps:

1) The cutting head setting type selection and focusing management type selection, and the focusing management selects an adjustable reflector;

2) the calibration of the proportion of the big valve and the small valve, wherein the small valve is calibrated in a mode of measuring voltage through zooming;

3) Adjusting the gap between the reflector and the mounting seat, and fixing the gap between the reflector and the mounting seat at 1mm by adjusting an M5 disc reed screw and an M4 jackscrew;

4) confirming the optical center and pulling the focus point, wherein the step 4) specifically comprises the following steps:

4.1) optical center adjustment: adjusting the M4 jackscrew of the reflector without adjusting the focusing lens;

when the optical center is on the upper side, adjusting an upper M4 jackscrew, and locking in the clockwise direction; when the device is downward, the M4 jackscrew is loosened in the counterclockwise direction;

when the optical center is deviated to the left, the right M4 jackscrew is locked clockwise; when the optical center is deviated to the right, the M4 jackscrew is loosened in the counterclockwise direction;

4.2) the selection of the nozzle is from big to small, after confirming that the optical center is centered, starting to pull a focus, measuring a focus line by using a roundness detector, selecting parameters of the focus, wherein the speed is 12000 mm/min, and the power is as follows: 1000W, height: 1/0.5mm, focus: 4/0/-8/-10 mm;

4.3) measuring black card: placing the black card on a measuring instrument, firstly drawing a reference measuring line segment, drawing an arc line 1 and an arc line 2, drawing the arc line to be as long as possible and positioned at the finest segment of the light beam, and calculating the shortest distance line segment between the arc line 1 and the arc line 2 to obtain a distance 1 line segment; and then calculating the distance = distance 2 from the reference measurement line segment to the distance 1 line segment, respectively calculating corresponding actual focal values according to a formula Y =11.5- (X + 1), wherein X is the distance 2, Y is the actual focal value, and writing in setting, wherein the setting needs to fill the actual calculated values into the focal values, and the accuracy is 1 digit after the decimal point.