What are the factors that affect the processing accuracy of metal laser cutting machines?

Q: What are the factors that affect the processing accuracy of metal laser cutting machines?

A: Compared with traditional processing technology, metal laser cutting machine has higher processing accuracy and better cross-sectional effect, without secondary processing. This is also the reason why many companies choose metal laser cutting machine. However, many companies have found that the cutting accuracy of laser cutting equipment is sometimes not ideal, which affects the subsequent processing flow. So what factors affect the machining accuracy?

1. Processing material

When the laser cutting machine processes metal, the cutting precision is different for different materials. Even if it is the same material, if the composition of the material is different, the cutting accuracy will be different. Therefore, the material of the workpiece also has a certain influence on the laser cutting accuracy. Generally, the smoother the material, the higher the processing accuracy.

Therefore, when processing different metal materials, you can make samples in advance to find out the most suitable parameter settings for such materials.

2. The shape of the laser beam

The beam emitted by the laser of the metal laser cutting machine is cone-shaped, so the cut gap is also cone-shaped. The shape of the laser beam is also a major factor affecting the cutting accuracy of a metal laser cutting machine. The smaller the spot after the laser beam is concentrated, the smaller the slit and the higher the processing accuracy.

Under such conical laser beam conditions, the greater the thickness of the workpiece, the lower the accuracy, and therefore the larger the slit. Therefore, when processing metals of different thicknesses, choosing the right laser power can achieve better results.

3. The accuracy of the workbench

When metal laser cutting machine is processing, the worktable vibrates with the vibration of the laser head. A high-precision worktable with a stable linear guide and a stepping motor will increase the cutting accuracy; if the worktable is uneven or other reasons, it will also affect the processing accuracy of the laser cutting machine.

4. Assist gas and nozzle

During the processing of metal laser cutting machine, the auxiliary gas and nozzle play the role of cleaning and controlling the cutting speed. The uneven pressure and temperature in the airflow will cause changes in the density of the airflow field, which will constrict the focus of the beam energy, cause refocusing or beam divergence, and affect the accuracy of metal cutting.