In the actual use of laser cutting machine, the problem that the cutting surface is not vertical often occurs. This problem not only affects the appearance quality of the product, but also may lead to errors in the assembly and subsequent processing of the parts. This paper will introduce in detail the effective method to solve the problem of non-vertical cutting surface of laser cutting machine, to help users improve the cutting quality and ensure the perpendicularity and smoothness of the cutting surface.

1. Align the laser beam

Laser beam alignment is the key to ensure the cutting accuracy of laser cutting machine. When there is a problem with the alignment of the laser head or optical lens, the laser beam may be off-center, resulting in a non-vertical cutting surface. Especially after the laser cutting is used for a long time or after many moves, the optical path system is prone to deviation.

The solution:

The optical path system of the laser cutting machine is calibrated regularly to ensure that the laser beam is perpendicular to the surface of the material. This is done by checking and adjusting the position of the laser head to ensure that it is perpendicular to the material. In addition, the lens needs to be inspected and cleaned to ensure that the transmission path of the optical system is unhindered. If there is a deviation in the optical path system, it can be corrected by adjusting the reflector or collimator inside the laser.

2. Adjust the laser focal length

The focal length of the laser beam directly affects the cutting quality. If the focal length is not set accurately, the laser beam may not focus properly on the surface or inside the material, resulting in uneven cutting depth, which in turn causes the cutting surface to tilt.

The solution:

The focal length of the laser beam is precisely adjusted according to the thickness and nature of the cutting material. Before the actual cutting operation, it is recommended to perform a small sample test to confirm that the focus position is suitable for the current material by cutting the sample. If the cutting effect is not ideal, the laser focal length should be properly adjusted to ensure that the focus of the laser beam is located in the middle area of the material to achieve the best cutting effect.

3. Optimize cutting speed

Cutting too fast will cause the laser beam to stay on the surface of the material for too short a time to fully cut the material. Especially for thicker materials, cutting too fast will cause the laser beam to produce different cutting effects at different depths of the material, resulting in non-vertical cutting surfaces.

The solution:

According to the thickness and characteristics of the material, the cutting speed is reduced appropriately. For thicker materials, it is recommended to use a slower cutting speed to ensure that the laser beam can make an even cut over the entire thickness range of the material. At the same time, the cutting speed and laser power should be coordinated to achieve the best cutting effect. In general, slow cutting helps to improve cutting accuracy and ensure that the cutting surface is vertical.

4. Adjust the laser power

Insufficient laser power or uneven laser power is another common cause of non-vertical cutting surfaces. If the power of the laser is not stable, the laser beam may not be able to consistently provide enough energy to complete the cutting of the entire material, resulting in inconsistent cutting depth and the problem of cutting surface tilt.

The solution:

Regularly check and calibrate the power output of the laser cutting machine to ensure its stability. The laser power output must match the material thickness to ensure that the laser beam has enough energy to penetrate the material. In addition, the state of the laser should also be checked, especially the internal components of the laser, such as the laser tube or pump source, whether there is attenuation, if the laser power decreases, the laser component should be maintained or replaced in time.