How to adjust the light position of the laser cutting machine, and how to adjust the focus of the la

1. There are three easy ways to determine the focal position in industrial production:

1. Printing method: make the cutting head move from top to bottom, and carry out laser beam printing on the plastic plate, and the minimum printing diameter is the focus.

2. Inclined plate method: use a plastic plate placed at an angle to the vertical axis to pull it horizontally, and find the smallest part of the laser beam as the focus.

3. Blue spark method: remove the nozzle, blow air, and hit the pulsed laser on the stainless steel plate, so that the cutting head moves from top to bottom until the maximum blue spark is the focus.

2. For the cutting machine with flying optical path, due to the divergence angle of the beam, the length of the cutting time course of the proximal and distal end is different, and the size of the beam before focusing is different, and the larger the diameter of the incident beam, the smaller the diameter of the focal spot.

3. In order to reduce the change in the size of the focal spot caused by the change of beam size before focusing, manufacturers of laser cutting systems at home and abroad provide some special devices for users to choose

1. Collimator. This is a commonly used method, that is, a collimator is added to the output end of the CO2 laser for beam expansion, and the beam diameter after beam expansion becomes larger, and the divergence angle becomes smaller, so that the beam size before the proximal and distal end are focused in the cutting working range is nearly the same.

The process of aligning the nozzle outlet of the laser cutting machine with the laser beam is the laser cutting machine coaxiality adjustment.

Test method for concentricity:

Nozzles: Dimensions.

Tool: Scotch tape paper.

Method: 1. Adjust the coaxial position at focus 0 so that the laser is in the center of the nozzle;

2. The focus is 6mm;

If the focus 0 and 6mm are in the center of the nozzle, it is normal; Otherwise, replace the cutting head or laser optical path offset.

If the laser head nozzle is not on the same axis as the laser beam, how should it be adjusted? Please see how to do it below.

Put an iron plate on the platform, the cutting head is lowered, you can see that the size of the spot is about 1cm, adjust the two screws, adjust to the most round effect, and there is an obvious red light border around.

Attach scotch tape to the nozzle and zero the focus in front. The burst power is placed at 5%-10%. Press the dot to emit light and observe if the laser dot on the tape is in the center of the nozzle.

If the laser spot is not in the center of the nozzle, tighten the screw on whichever side the laser spot is biased. Pay attention to the angle of twisting is not too large, continue to use the tape to point out the light, first twist a little to see the effect, while the other one is a little looser, slowly adjust until it is adjusted to the center.

The parameter setting of the laser cutting machine generally needs to be set according to the cutting material, material thickness, cutting speed, power and other factors.

Focal length is a very important parameter of the laser cutting machine, which usually needs to be set according to the thickness of the material and the power of the laser. The position of the focal point will have a direct impact on the depth and quality of the cut. Cutting speedCutting speed refers to the speed at which the laser head moves.

These include factors such as the thickness of the material, the quality of the cut, and the power of the laser. In general, the thinner the material, the faster the cutting speed should be.

The power of the power laser is also one of the factors that affect the quality of the cut. The power setting also needs to be adjusted according to the specific cutting material and thickness, and generally speaking, the thicker the material, the more power is required. Laser gas type and flow rateLaser gas type and flow rate are also one of the most important parameters in the cutting process.

Usually laser cutting requires the use of gases such as oxygen or nitrogen as auxiliary gases to improve the quality and speed of the cut.

Precautions for the operation of the laser cutting machine

The operator must strictly abide by the safety operation procedures of the laser cutting machine, and shall not use it incorrectly and cause serious damage. The operator must consult all the accompanying instructions or be trained by a professional to be familiar with the structure and performance of the laser cutter and to have knowledge of the operating system. Do not place paper, cloth, or other flammable materials near unprotected laser beams.

Wear labor protection equipment according to regulations, and wear protective glasses near the laser beam according to regulations. Do not process the material until you know if it can be irradiated or heated by a laser to avoid producing harmful fumes and vapors. When the laser cutting machine is started, the operator shall not leave the post or entrust others to take care of it.

Keep the fire extinguisher within easy reach.