The reason why the fiber laser cutting machine has errors is that there are many problems in the process of using the fiber laser cutting machine, including errors in the laser cutting process and poor laser cutting effect. How do these errors happen?
1. The geometric error of the workpiece is affected by many reasons. The surface of the processed object fluctuates and generates heat during the cutting process, which makes the surface of the thin plate easy to deform. Due to the uneven surface, the laser focus changes randomly with the position and ideal position of the machined object surface.
2. The cutting thickness of the material exceeds the cutting material standard. Taking 3000 watts as an example, the thickness of the cutting plate of the laser cutting machine is less than 20mm. The thinner the plate, the easier it is to cut and the better the quality. If the steel plate is too thick, the laser cutting machine is more difficult to cut. Under the condition of ensuring cutting, there will be errors in machining accuracy, so it is necessary to determine the thickness of the plate.
3. Programming error in the processing of fiber laser cutting machine, the processing track on the complex surface has straight lines, arcs, etc. There is an error between the fitting curve and the actual curve. These errors lead to errors between the relative position of the actual focus and the surface of the object being processed and the ideal programming position. Some teaching programming systems may also bring some errors.
4. In the cutting process of the fiber laser cutting machine, the focus position error occurred in the laser cutting process of sample 02. Many factors change the relative position between the focus and the surface of the processed object, which is also related to the surface roughness of the sample. Surface smoothness of processed products. Workpiece clamping method, geometric error of machine tool and long-term load of machine tool will deform.
The thermal deformation of the workpiece in the processing process will lead to the deviation between the laser focusing position and the ideal given position (programming position), which is inevitable for these random errors. Only through on-line detection and control can we reduce the error and improve the working accuracy of fiber laser cutting machine.